CN115120428A - A wheelchair bracket and wheelchair - Google Patents

Abstract

The invention belongs to the technical field of means of transportation, and specifically discloses a wheelchair support and a wheelchair. The wheelchair bracket includes: a backrest bracket; a seat bracket, which is rotatably connected to the backrest bracket through a backrest rotating shaft; an angle adjustment mechanism, including an adjustment piece, a linked rocker arm and a locking piece, the adjustment piece is fixedly connected to the backrest bracket, and the edge is provided with a Several tooth slots are arranged at intervals along the circumferential direction of the backrest rotating shaft. The rocker arm is rotatably installed on the outside of the seat bracket, and the locking piece is provided with convex teeth. The rotation of the rocker arm can drive the locking piece to move to make the convex teeth move. The backrest bracket and the seat bracket are locked relative to each other when the protruding teeth are engaged in the tooth slot, and when the protruding teeth are disengaged from the tooth slot, the backrest bracket can rotate relative to the seat bracket. The wheelchair includes the wheelchair bracket described above. The wheelchair bracket and the wheelchair disclosed by the invention can improve the use comfort and operation convenience of the wheelchair bracket and the wheelchair, and simplify the angle adjustment structure of the backrest bracket.

Description

A wheelchair bracket and wheelchair

technical field

The invention relates to the technical field of means of transportation, in particular to a wheelchair bracket and a wheelchair.

Background technique

Wheelchair is not only a means of transportation for the physically disabled and people with limited mobility, but also an important rehabilitation tool that helps wheelchair users to exercise and participate in social activities with the help of wheelchairs.

Wheelchairs generally include wheelchair frames, wheels, brakes, seat cushions and back cushions. Wheelchair frames generally include seat brackets, backrest brackets, front leg brackets, rear wheel brackets, armrest brackets, etc. The front wheel in the wheel is set On the front leg bracket, the rear wheel among the wheels is arranged on the rear wheel bracket, the braking device is arranged on the wheel, and the seat cushion and the backrest are respectively arranged on the seat bracket and the backrest bracket. Ordinary wheelchairs use artificial push to make the wheelchair run; on the basis of the above structure of the hand-cranked wheelchair, a hand-cranked device is added to control the operation of the wheelchair; the electric wheelchair adds an electronic power assist system on the basis of the above-mentioned structure, which can make the wheelchair user more convenient. It can operate and control the operation of the wheelchair to reduce the physical exertion of the user.

Due to the large size and weight of the wheelchair, in order to facilitate the use of the wheelchair, most of the existing electric wheelchairs have a foldable structure, and the whole vehicle can be folded to reduce the volume of the wheelchair when it is not in use. In addition, in the existing foldable wheelchair, the backrest can be folded relative to the seat, and the deployment angle can also be adjusted relative to the seat, so as to improve the comfort of use. However, the existing angle adjustment mechanism between the backrest and the seat usually has problems such as complex adjustment structure and poor adjustment, which affects the use experience of the wheelchair.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a wheelchair bracket to improve the convenience and reliability of the folding and angle adjustment of the backrest bracket.

To achieve the above object, the present invention adopts the following technical solutions:

A wheelchair support comprising:

backrest bracket;

a seat bracket, which is rotatably connected to the backrest bracket through a backrest rotating shaft;

The angle adjustment mechanism includes an adjustment piece, a linked rocker arm and a locking piece, the adjustment piece is fixedly connected to the backrest bracket, a number of tooth slots are opened on the edge of the adjustment piece, and a number of the tooth slots are along the edge of the backrest bracket. The backrest rotating shafts are arranged at intervals in the circumferential direction, the rocker arm is rotatably mounted on the outside of the seat bracket, the locking member is provided with protruding teeth, and the rotation of the rocker arm can drive the locking member to move to make the locking member move. The protruding teeth are engaged or disengaged from the tooth slots, and when the protruding teeth are engaged in the tooth slots, the backrest bracket and the seat bracket are relatively locked, and when the protruding teeth are disengaged from the tooth slots When the backrest bracket is rotatable relative to the seat bracket.

The beneficial effects of the present invention are:

The angle adjustment mechanism and wheelchair bracket provided by the present invention, because the rocker arm is arranged on the outside of the seat bracket, can facilitate the wheelchair user to rotate the rocker arm, and improve the convenience of angle adjustment and folding of the backrest bracket; A plurality of tooth slots are arranged on the edge, and the inclination angle of the backrest bracket relative to the seat bracket can be adjusted by controlling the protruding teeth to be stuck into the tooth slots of different positions, which is convenient for adjustment, and can realize the adjustment of different angle gears. That is, the wheelchair bracket and the wheelchair provided by the present invention can realize the folding and angle adjustment of the backrest bracket relative to the seat bracket, and the angle adjustment mechanism has a simple structure, reliable locking and convenient adjustment operation.

Another object of the present invention is to provide a wheelchair to improve the convenience and comfort of the wheelchair.

To achieve the above object, the present invention adopts the following technical solutions:

A wheelchair comprising the wheelchair support as described above.

In the wheelchair provided by the present invention, the use comfort and operation convenience of the wheelchair can be improved by adopting the above-mentioned wheelchair bracket.

Description of drawings

FIG. 1 is a partial structural schematic diagram of the seat support provided in Embodiment 1 of the present invention when it is in an unfolded state;

2 is a partial structural schematic diagram of the seat support provided in Embodiment 1 of the present invention when it is in a folded state;

3 is a schematic structural diagram of the angle adjustment mechanism provided in Embodiment 1 of the present invention in an unlocked state;

4 is a schematic diagram of the inner side structure of the angle adjustment mechanism provided in the first embodiment of the present invention in the last lock state;

5 is a schematic structural diagram of the angle adjustment mechanism provided in Embodiment 1 of the present invention when it is in a folded state;

6 is a schematic structural diagram of the angle adjustment mechanism provided in the first embodiment of the present invention when the connecting rod is in contact with the abutting surface;

7 is a schematic structural diagram of the angle adjustment mechanism provided in the first embodiment of the present invention when the convex teeth are in contact with the guide surface;

8 is a schematic view of the outer side structure of the angle adjustment mechanism provided in the first embodiment of the present invention in the last locked state;

9 is a schematic structural diagram of a wheelchair provided by Embodiment 2 of the present invention;

FIG. 10 is a partial structural schematic diagram of a wheelchair support provided in Embodiment 2 of the present invention;

FIG. 11 is a schematic structural diagram of a powertrain provided in Embodiment 2 of the present invention.

The figures are marked as follows:

10. Angle adjustment mechanism; 20. Backrest bracket; 201, Insert rod; 30, Seat bracket; 40, Powertrain; 401, First lap rod; 402, Second lap rod; rod; 404, the base; 50, the second lap block; 501, the second groove; 60, the third lap block;

1. Adjusting part; 11. Main body of plate; 12. Flange part; 121. Tooth slot; 122. Guide surface; 13. Installation cylinder part; 14. Weight reduction hole; 21. Install the main board part; 22. Edge part; 23. Reinforcing ribs; 24. The first lap block; 241, The first groove; 3. Rocker arm; 41, the first rod part; 42, the second rod part; 43, the actuating shaft; 5, the locking piece; 51, the convex teeth; 52, the sliding hole; rod; 621, rod main body; 622, upper limit part; 623, lower limit part; 63, lower bracket; 631, sliding sleeve part; 632, mounting frame part; 633, adapter frame part; 6331, limit slot; 64 65, the mounting seat; 66, the pivot shaft; 67, the frame shaft; 7, the backrest shaft; 8, the limit protrusion; 81, the limit slope; 9, the sidewall; 91, the abutting surface; 92. Hook blocking part.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, the drawings only show some but not all structures related to the present invention.

In the description of the present invention, unless otherwise expressly specified and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integrated ; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may include the first and second features in direct contact, or may include the first and second features Not directly but through additional features between them. Also, the first feature being "above", "over" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature is "below", "below" and "below" the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.

In the description of this embodiment, the terms "up", "down", "right", "front", "rear" and other orientations or positional relationships are described based on the orientation of the wheelchair in use, which is only for the convenience of description and the simplification of operations , rather than indicating or implying that the indicated device or element must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention. In addition, the terms "first" and "second" are only used for distinction in description, and have no special meaning.

Example 1

This embodiment provides a foldable wheelchair, which has two states: folded and unfolded. When the wheelchair is in the unfolded state, the wheelchair user can use the wheelchair as a means of transportation or a rehabilitation aid; when the wheelchair is in the folded state It is convenient for wheelchair users or other auxiliary personnel to carry and store the wheelchair and save the space of the wheelchair.

As shown in FIGS. 1 and 2 , the wheelchair provided in this embodiment mainly includes a wheelchair bracket, a front wheel, a rear wheel, a seat cushion, a back cushion, and the like. The wheelchair bracket includes a seat bracket 30 , a backrest bracket 20 , a rear wheel bracket 40 and a front leg bracket. The rear part of the seat bracket 30 is rotatably connected to the lower end of the backrest bracket 20 , and both sides of the front end of the seat bracket 30 are rotatably connected respectively. There are front leg brackets, and the lower ends of the front leg brackets are rotatably connected to the front wheels; the upper ends of the rear wheel brackets 40 are rotatably connected to the rear of the seat brackets 30 and are located below the backrest brackets 20, and the lower ends of the rear wheel brackets 40 are connected with rear wheels ; The seat cushion is covered on the upper surface of the seat bracket 30, and the back cushion is covered on the front side of the backrest bracket 20, so as to improve the comfort of the wheelchair.

The backrest bracket 20 and the seat bracket 30 are rotatably connected through the angle adjustment mechanism 10 to realize the folding and angle adjustment of the backrest bracket 20 relative to the seat bracket 30 . And the present invention mainly describes and limits the specific structure of the angle adjustment mechanism 10. The specific structures and connection methods of the backrest bracket 20, the seat bracket 30, the rear wheel bracket 40 and the front leg bracket can be set with reference to the prior art. This is not the focus of the present invention, and will not be described in detail in this embodiment.

Specifically, the backrest support 20 and the seat support 30 are rotatably connected by the backrest rotating shaft 7 , and the left and right sides of the backrest support 20 are provided with an angle adjustment mechanism 10 . The angle adjustment mechanism 10 includes an adjustment member 1, a linked rocker arm 3 and a locking member 5. The adjustment member 1 is fixedly connected to the backrest bracket 20, and the edge of the adjustment member 1 is provided with a plurality of tooth slots 121, and a plurality of tooth slots 121 They are arranged at intervals along the circumferential direction of the backrest shaft 7; the rocker arm 3 is rotatably mounted on the outer side of the seat bracket 30, the locking member 5 is provided with a convex tooth 51, and the rotation of the rocker arm 3 can drive the locking member 5 to rotate to make the convex tooth 51 The backrest bracket 20 and the seat bracket 30 are locked relative to each other when the protruding teeth 51 are engaged in the tooth slot 121 , and when the protruding teeth 51 are disengaged from the tooth slot 121 , the backrest bracket 20 can be opposite to the seat bracket 30 turn.

In the angle adjustment mechanism 10 and the wheelchair bracket provided in this embodiment, since the rocker arm 3 is arranged on the outer side of the seat bracket 30 , it is convenient for the wheelchair user to rotate the rocker arm 3 , and the convenience of angle adjustment and folding of the backrest bracket 20 is improved. By setting a plurality of tooth slots 121 at the edge of the adjusting member 1, the inclination angle of the backrest bracket 20 relative to the seat bracket 30 can be adjusted by controlling the protruding teeth 51 to be snapped into the tooth slots 121 at different positions, and the adjustment is convenient and can be realized. Adjustment of different angle gears. That is, the wheelchair bracket and wheelchair provided in this embodiment can realize the folding and angle adjustment of the backrest bracket 20 relative to the seat bracket 30, and the angle adjustment mechanism has a simple structure, reliable locking and convenient adjustment operation.

As shown in FIGS. 3 and 4 , in one embodiment, the angle adjustment mechanism 10 further includes a mounting plate 2 , the mounting plate 2 is fixedly connected to the rear end of the seat bracket 30 , and the mounting plate 2 and the adjusting member 1 pass through the backrest rotating shaft 7 Turn the connection. By providing the mounting plate 2 , the connection structure between the seat bracket 30 and the backrest bracket 20 can be concentrated on the adjusting member 1 and the mounting plate 2 , simplifying the processing and assembly of the seat bracket 30 and the backrest bracket 20 . And the installation of the mounting plate 2 can raise the height of the backrest rotating shaft 7 relative to the seat bracket 30, thereby increasing the folding degree of the backrest bracket 20 and the seat bracket 30, so that the backrest bracket 20 can be completely folded to approximately the same height as the seat. The position of the chair support 30 is parallel. In this arrangement, when the backrest bracket 20 is provided with a cushion and the seat bracket 30 is provided with a seat cushion, the cushion can be fitted with the seat cushion, thereby improving the folding performance of the wheelchair and the folded aesthetics.

Preferably, the first end of the mounting plate 2 is connected to the rear end of the seat bracket 30 , the second end of the mounting plate 2 extends backward and upward slantingly, and the adjusting member 1 and the second end of the mounting plate 2 are rotatably connected through the backrest shaft 7 .

Preferably, the locking member 5 is rotatably connected with the mounting plate 2, and the angle adjustment mechanism 10 further includes a connecting rod 4, which is respectively connected with the rocker arm 3 and the locking member 5, and the rocker arm 3 drives the locking member 5 to rotate through the connecting rod 4, In order to switch the locking member 5 between the locking position and the unlocking position, when the locking member 5 is in the locking position, the protruding teeth 51 can be snapped into any tooth slot 121, and when the locking member 5 is in the unlocking position, the protruding teeth 51 come out Cogging 121 . This arrangement can simplify the structure of the locking piece 5 , reduce the size of the locking piece 5 , and can better design the running track of the protruding teeth 51 .

The rocker arm 3 includes an arm rotating shaft 31 and a handle 32. The arm rotating shaft 31 is arranged horizontally and is parallel to the rotating shaft and the backrest rotating shaft 7 of the backrest bracket 20. The arm rotating shaft 31 rotates and passes through the seat bracket 30, and the first end of the arm rotating shaft 31 extends into The inner side of the seat bracket 30 is connected with the first end of the connecting rod 4 , and the second end is exposed outside the seat bracket 30 and is connected with the handle 32 , the handle 32 extends along the front and rear directions of the seat bracket 30 . This arrangement can improve the operational convenience of the rocker arm 3 and improve the experience of using the wheelchair. More preferably, when the angle adjustment mechanism 10 is in the locked state, the handle 32 is positioned horizontally to reduce interference with external structures.

The locking member 5 is provided with a sliding hole 52, and the connecting rod 4 is protruded with an actuating shaft 43, and the actuating shaft 43 is slidably inserted into the sliding hole 52, and when the actuating shaft 43 rotates with the connecting rod 4 around the axis of the rotation shaft of the rocker arm 3 , the actuating shaft 43 slides in the sliding hole 52 to drive the locking member 5 to rotate, and when the actuating shaft 43 slides from the first end of the sliding hole 52 to the second end of the sliding hole 52, the locking member 5 rotates from the locking position Switch to the unlocked position. In other embodiments, the connecting rod 4 may also be provided with a sliding hole, and the locking member 5 may be provided with an actuating shaft.

In one embodiment, the locking member 5 includes a main body portion 53, one end of the main body portion 53 is rotatably connected to the mounting plate 2, the other end of the main body portion 53 is protruded with a protruding tooth 51 along the direction toward the backrest shaft 7, and the sliding hole 52 is provided On the main body portion 53 , the protruding teeth 51 are trapezoidal teeth, and the large ends of the trapezoidal teeth are connected to the main body portion 53 .

Correspondingly, the tooth slot 121 is a rectangular slot, which has a front slot wall and a rear slot wall oppositely arranged, and it can be understood that the front slot wall refers to the slot wall closer to the front side of the wheelchair bracket, and the rear slot wall is closer to the front side of the wheelchair bracket. Slot wall on rear side of wheelchair support. Except for the one tooth slot 121 on the rearmost side, the shape of the remaining tooth slots 121 is adapted to the shape of the protruding teeth 51 . And when the protruding teeth 51 are snapped into any slot 121 except the rearmost side, the rear slot wall of the slot 121 can fit with the protruding teeth 51 , and the pressure angle formed by the protruding teeth 51 and the rear slot wall is a negative angle. In this arrangement, when the backrest bracket 20 has a tendency to rotate counterclockwise under the downward pressing action of the user or the downward pressing action of an external force, the rear side groove wall exerts a force that is inclined forward and perpendicular to the rear side groove wall to the convex teeth 51 , the force urges the protruding teeth 51 to have a tendency to snap into the groove bottom of the tooth slot 121, so that the protruding teeth 51 and the tooth slot 121 cooperate more closely, effectively preventing the protruding teeth 51 from coming out of the tooth slot 121, and ensuring the backrest bracket 20 and the tooth slot 121. The reliability and safety of the seat bracket 30 locking.

Further, when the actuating shaft 42 is located at the first end of the sliding hole 52 , the pressure angle of the connecting rod 4 where the actuating shaft 42 is located is a negative value. Therefore, when the backrest bracket 20 has a tendency to rotate clockwise, the front side groove wall of the tooth slot 121 is in contact with the convex tooth 51, and the connecting rod 4 is at the dead center position, the locking member 5 cannot drive the connecting rod 4 to move, so that the The protruding teeth 51 cannot escape from the tooth slots 121 , that is, the protruding teeth 51 are tightly clamped in the tooth slots 121 .

That is, in this embodiment, the actuator 5 , the connecting rod 4 and the tooth slot 121 can be arranged so that the protruding teeth 51 can be inserted into any tooth slot 121 except the rearmost side, the locking member 5 , the connecting rod 4 and the adjusting member 1 The formed locking components all have the self-locking function, so that when the backrest bracket 20 has a tendency of turning forward clockwise or turning backward counterclockwise, the protruding teeth 51 cannot be separated from the tooth slots 121, and can only pass through the lock of the rocker arm 3. The rotation drives the protruding teeth 51 to disengage from the tooth slots 121 , which improves the state locking reliability and safety of the angle adjustment mechanism 10 .

Preferably, the actuating shaft 43 is a cylindrical shaft, the sliding hole 52 is an elongated hole, and the width of the sliding hole 52 is equal to the diameter of the actuating shaft 43 .

Preferably, in order to keep the locking member 5 returning to the locking position, the angle adjustment mechanism 10 further includes a restoring member, and the restoring member is used to apply an elastic force to the locking member 5 to maintain or return to the locking position. In one embodiment, the locking member 5 is rotatably connected to the mounting plate 2 through the locking shaft, and the restoring member is a torsion spring sleeved on the locking shaft. In another embodiment, the reset member may also be a spring, one end of the spring is fixed relative to the mounting plate 2 , and the other end of the spring is fixed on the locking member 5 or the connecting rod 4 .

As shown in FIGS. 4 and 5 , preferably, the angle adjustment mechanism 10 further includes a folding locking structure, which is configured when the backrest bracket 20 is folded relative to the seat bracket 30 to lock the gap between the backrest bracket 20 and the seat bracket 30 . The relative position ensures the stability of the state after folding.

The folding locking structure includes a limiting protrusion 8 protruding on the adjusting member 1 , and the limiting protrusion 8 has a limiting inclined surface 81 facing the connecting rod 4 . When the backrest bracket 20 is in the folded state, the limiting slope 81 extends from bottom to top in the direction toward the front side of the wheelchair, the link 4 is in the locked position, and the second end face of the link 4 can abut on the limiting slope 81 Therefore, the limiting protrusion 8 can be restricted from rotating counterclockwise relative to the connecting rod 4 , that is, the backrest bracket 20 can be restricted from being extended relative to the seat bracket 30 . When the backrest bracket 20 needs to be unfolded, the rocker arm 3 needs to be rotated, so that the connecting rod 4 is rotated counterclockwise from the locked position to the unlocked position, so that the connecting rod 4 can be disengaged from the limiting protrusion 8, and the backrest support 20 can be opposite to the seat The chair support 30 is rotated and deployed.

In order to improve the convenience of the deployment operation, after the connecting rod 4 is in contact with the limiting protrusion 8, the handle 32 can be released after the backrest bracket 20 is rotated by a certain angle, so as to facilitate the continued implementation of the deployment operation of the backrest bracket 20. In order to prevent the connecting rod 4 from returning to the locked position under the action of the reset member, causing the adjusting member 1 to be stuck or stuck in rotation, the angle adjustment mechanism 10 further includes a stop structure, which is used to make the locking member 5 close to the backrest bracket 20 . maintains an unlocked position during folding or unfolding.

As shown in Figures 5-7, the stopper structure includes a rib 9 protruding on the adjusting member 1, the first end of the rib 9 is connected to the limit protrusion 8, and the second end of the rib 9 is away from the limit The direction of the protrusion 8 extends backward, and the side of the rib 9 away from the backrest rotating shaft 7 forms an abutting surface 91 , and the distance between the abutting surface 91 and the backrest rotating shaft 7 gradually increases from the first end to the second end of the rib 9 , the end of the connecting rod 4 can be pressed against the abutting surface 91 . The arrangement of the stop structure has the advantages of simple structure, convenient arrangement and low cost. And when the backrest bracket 20 is in the folding process, the end of the connecting rod 4 abuts against the abutting surface 91, and the reset member is always in an elastic restoring force. When out of contact, the connecting rod 4 suddenly resets under the action of the elastic restoring force of the reset piece and abuts against the limiting inclined surface 81 , thereby producing a clicking sound to remind the folding self-locking formation.

More preferably, the distance between the rib 9 and the backrest shaft 7 is gradually increased from the first end to the second end of the rib 9, so that when the backrest bracket 20 is switched from the folded state to the unfolded state, the rib can be guaranteed. 9 Always press the connecting rod 4 to prevent the connecting rod 4 from being reset and improve the limit reliability. Further, the second end of the rib 9 is extended with a blocking hook portion 92 in the direction toward the backrest rotating shaft 7 , and when the connecting rod 4 is out of contact with the rib 9 , the blocking hook portion 92 is located on the front side of the connecting rod 4 , so that When the backrest bracket 20 is folded clockwise, the blocking hook portion 92 can abut against the side of the connecting rod 4 to limit the continuous rotation of the backrest bracket 20, that is, the setting of the blocking hook portion 92 can limit the backrest bracket 20 to reverse during the unfolding process Rotation for improved safety and reliability during deployment.

Further, the stop structure includes a guide surface 122 disposed at the edge of the adjusting member 1, the guide surface 122 is located on one side of the tooth slot 121 in the counterclockwise direction, and when the backrest bracket 20 is rotated from the folded state to the unfolded locking state, the protruding The teeth 51 can slide along the guide surface 122 to a tooth slot 122 closest to the guide surface 122 . The setting of the guide surface 122, on the one hand, through the pressing of the guide surface 122 against the protruding teeth 51, the locking member 5 is always in the non-locking position to avoid jamming or jamming, and on the other hand, the protruding teeth 51 can be better controlled. When the backrest bracket 20 is switched from the folded state to the unfolded state, the protruding teeth 51 can slide into the first tooth slot 121 along the guide surface 122 , improving the smoothness of the protruding teeth 51 being snapped into the tooth slot 121 .

Further, the stop structure is configured such that: when the connecting rod 4 abuts against the abutting surface 91 , the protruding teeth 51 are not in contact with the guide surface 122 ; when the connecting rod 4 is located on the side of the rib 9 away from the limiting protrusion 8 , the protruding teeth 51 slide against the guide surface 122 . Thereby, the structural arrangement of the angle adjustment mechanism 10 can be simplified.

For the convenience of description, the tooth slot 121 closest to the guide surface 122 is referred to as the first tooth slot 121, each tooth slot 121 corresponds to an angular gear, and the angular gear corresponding to the first tooth slot 121 is the first angular gear, The serial numbers of the tooth slots 121 and the angle gears gradually increase in the direction away from the guide surface 122 . In this embodiment, there are four angle gears, which can respectively make the backrest bracket 20 tilt relative to the seat bracket 30 at 105°, 115°, 125° and 135°. However, it can be understood that the number of angle gears and the angle value corresponding to each angle gear can be specifically set according to requirements, which is not specifically limited in the present invention.

In order to limit the maximum angle at which the backrest bracket 20 is unfolded relative to the seat bracket 30, the angle adjustment mechanism further includes an unfolding limit structure, and the setting of the unfolding limit structure can improve the safety and reliability during the angle adjustment process of the backrest bracket 20, and avoid the backrest bracket. 20 Backward tipping during the rearward rotation adjustment causes a collision to a person or structure.

As shown in FIG. 8 , in this embodiment, the deployment limiting structure includes a limiting baffle 15 protruding from the outer surface of the adjusting member 1 , and the limiting baffle 15 is located on the rear side of the mounting plate 2 . When the seat bracket 30 is in the last gear, the limiting baffle 15 abuts against the mounting plate 2 to restrict the backrest bracket 20 from continuing to rotate backwards. This deployment limiting structure has a simple structure and is easy to process. In other embodiments, other existing structures can also be used to limit the maximum angle of the backrest bracket 20 being flipped backwards.

In one embodiment, the adjusting member 1 includes a plate body 11 and a flange portion 12 protruding from the periphery of the plate body 11 . The plate body 11 is parallel to the mounting plate 2 and is located inside the mounting plate 2 . The thickness direction of the main body 11 protrudes outward from the two opposite sides of the plate main body 11 , the mounting plate 2 and the connecting rod 4 are respectively located on opposite sides of the adjusting member 1 , and one side of the flange portion 12 is in contact with the mounting plate 2 . The other side of the edge portion 12 is in contact with the link 4 . The limiting protrusions 8 and the ribs 9 are both protruded on the inner side of the board body 11 , and the thickness of the limiting protrusions 8 and the ribs 9 protruding from the board body 11 is greater than the height of the flange portion 12 protruding from the mounting board 2 , the guide surface 122 is formed on the side surface of the flange portion 12 . This arrangement can facilitate the arrangement of the limiting protrusion 8, the retaining edge 9 and the guide surface 122, and at the same time, it can avoid the direct contact between the plate main body 11 and the connecting rod 4 and the mounting plate 2, and reduce the connection between the adjusting member 1 and the mounting plate 2. The contact area of the rod 4 reduces the rotational resistance and improves the rotational smoothness of the connecting rod 4 and the adjusting member 1 .

In order to better realize the connection between the adjusting member 1 and the backrest bracket 20, the adjusting member 1 is also connected with the installation cylinder portion 13. The backrest bracket 20 includes two insertion rods 201 spaced along its width direction, and the insertion rods 201 are inserted into the corresponding side Installed in the cylindrical portion 13 and screwed with the mounting cylindrical portion 13 . Preferably, the flange portion 12 is connected with the mounting cylinder portion 13 by welding, so as to improve the overall structural stability of the adjusting member 1 . Further, several weight reduction holes 14 are also provided on the board main body 11 to reduce the overall weight of the angle adjustment mechanism 10 .

In another embodiment, the mounting board 2 includes a mounting mainboard portion 21 and an edge portion 22 surrounding the periphery of the mounting mainboard portion 21 , the mounting mainboard portion 21 is parallel to the board main body 11 , and the edge portion 22 is along the mounting mainboard portion 21 . The thickness direction of the mounting plate 2 protrudes outward from opposite sides of the mounting main plate portion 21 , and the edge portion 22 abuts against the flange portion 12 to reduce the contact area. Preferably, a reinforcing rib 23 is protruded on the mounting main board portion 21 , and the protruding height of the reinforcing rib 23 is equal to the height of the edge portion 22 protruding from the same side of the mounting main board portion 21 , so as to increase the overall structural strength of the mounting board 2 and ensure the Contact reliability.

In one embodiment, the connecting rod 4 includes a first rod portion 41 and a second rod portion 42 that are connected in a V-shape. One end of the first rod portion 41 away from the second rod portion 42 is connected to the rocker arm 3, and the second rod portion is connected to the rocker arm 3. The end of 42 away from the first rod portion 41 can abut with the rib 9 and the limiting slope 81 , and the included angle between the first rod portion 41 and the second rod portion 42 is greater than 90° and less than 180°. The actuating shaft 43 is connected to where the first rod portion 41 and the second rod portion 42 are connected.

As shown in FIGS. 3-5 , further, the angle adjustment mechanism 10 further includes a shock absorber assembly 6 , the shock absorber assembly 6 includes a shock absorber spring 61 , and the shock absorber spring 61 is configured to: when the backrest bracket 20 is in the unfolded state The backrest bracket 20 applies a moment that drives the backrest bracket 20 to rotate clockwise around the backrest rotation axis 7 .

The setting of the damping spring 61, when the protruding teeth 51 snap into the tooth slot 121, that is, when the backrest bracket 20 is in the unfolded and locked state, the damping spring 61 makes the backrest bracket 20 rotate clockwise due to the elastic restoring force. The movement trend of the protruding tooth 51 and the side wall of the tooth slot 121 close to the guide surface 122 are closely attached to avoid the problem of the backrest bracket 20 shaking back and forth due to the gap between the protruding tooth 51 and the slot wall of the tooth slot 121; At the same time, the influence of gravity on the backrest support 20 when the user leans against the backrest support 20 can be eliminated, and the use comfort of the wheelchair support and the wheelchair can be improved; Therefore, the angle of the backrest bracket 20 can be reduced more conveniently and the difficulty of adjustment can be reduced.

Further, the shock-absorbing spring 61 extends obliquely downward along the rear side to the front side of the wheelchair bracket, and the lower end of the shock-absorbing spring 61 is connected with the seat bracket 30, and the upper end of the shock-absorbing spring 61 is connected with the backrest bracket 20, when the backrest bracket When the 20 is in the unfolded state, the upper end of the damping spring 61 is located at the rear side of the backrest rotation shaft 7 and the damping spring 61 is in a compressed state. Therefore, when the protruding teeth 51 are engaged in any tooth slot 121 , the damping springs 61 are in a compressed state, and as the expansion angle of the backrest bracket 20 increases, that is, the number of gears of the backrest bracket 20 increases, the damping springs 61 are in a compressed state. The amount of compression increases, and the elastic restoring force exerted by the shock-absorbing spring 61 on the backrest bracket 20 increases, which is more beneficial for the backrest bracket 20 to change from a relatively large angle corresponding to the backrest bracket 20 in a high-speed position to a relatively large angle corresponding to the backrest bracket 20 in a low-speed position. The small angle rebound is more suitable for the actual situation that the larger the rotation angle of the backrest bracket 20 is, the greater the backward pressure exerted by the user on the backrest.

In order to facilitate the installation of the shock-absorbing spring 61, the shock-absorbing assembly 6 further includes a lower bracket 63 and a sliding rod 62. The lower bracket 63 is rotatably connected to the seat bracket 30, and the lower part of the sliding rod 62 slides through the lower bracket 63, and its upper end passes The pivot shaft 66 is rotatably connected with the backrest bracket 20, the upper end of the sliding rod 62 is provided with an upper limit portion 622, and the rotation axes of the lower bracket 63 and the pivot shaft 66 are parallel to the axis of the backrest shaft 7; the damping spring 61 is sleeved on the On the sliding rod 62 , the lower end of the damping spring 61 abuts on the lower bracket 63 , and the upper end of the damping spring 61 abuts on the upper limit portion 622 . By arranging the sliding rod 62 and the lower bracket 63, the shock absorber assembly 6 can rotate synchronously with the backrest bracket 20 during the unfolding or folding process of the backrest bracket 20, so as to avoid the shock absorption spring 61 from being twisted or bent to a large extent; The arrangement of the rod 62 can also ensure the expansion and contraction direction of the shock absorbing spring 61 and improve the reliability of the shock absorbing spring 61 in use.

Preferably, the lower bracket 63 is provided with a sliding sleeve portion 631 with two ends passing through.

The shock absorber assembly 6 further includes a limiter 64 , when the backrest bracket 20 is turned backward to a set angle, the limiter 64 abuts against the lower bracket 63 to restrict the lower bracket 63 from continuing to rotate counterclockwise with the backrest bracket 20 . Preferably, the setting angle is equal to or smaller than the deployment angle of the backrest bracket 20 relative to the seat bracket 30 when the first gear angle is geared.

With the above arrangement, when the backrest bracket 20 is rotated from the folded state to the set angle, the backrest bracket 20 drives the upper end of the sliding rod 62 to rotate backwards and downwards, thereby driving the lower bracket 63 to rotate counterclockwise until the lower bracket 63 and the limiter 64 After contact, the lower bracket 63 stops rotating, the rotation of the backrest bracket 20 drives the sliding rod 62 to slide relative to the lower bracket 63, and the damping spring 61 compresses until the protruding teeth 51 are inserted into the first gear slot 121; when the backrest is enlarged When the bracket 20 is in the gear position, the backrest bracket 20 is reversed counterclockwise in the unlocked state, and when the pivot shaft 66 of the sliding rod 62 rotates counterclockwise with the adjusting member 1, the upper end of the sliding rod 62 rotates around the pivot shaft 66. The lower bracket 63 is relatively fixed, the distance between the pivot shaft 66 and the upper end of the sliding sleeve portion 631 is reduced, the sliding rod 62 slides downward in the sliding sleeve portion 631 , and the damping spring 61 continues to be compressed.

That is, the setting of the limiting member 64 can ensure that when the angle of the backrest bracket 20 is larger, the compression degree of the shock-absorbing spring 61 is greater, and can ensure the correctness of the compression direction of the backrest bracket 20, and improve the reliability of the use of the angle adjustment mechanism 10. and when the backrest bracket 20 is in the locked state, since the shock-absorbing spring 61 is in a compressed state, the shock-absorbing spring 61 exerts a forward and downward force on the lower bracket 63, so that the lower bracket 63 tightly abuts on the limiting member 64 , to ensure that the shock absorber assembly 6 does not continue to rotate. Furthermore, with this arrangement, when the backrest bracket 20 is folded and the angle is set, the damping spring 61 can be in an extended state, so that the damping spring 61 can exert a backward and upward restoring force on the backrest bracket 20 . , which is beneficial to the reset of the backrest bracket 20 from the folded state to the unfolded state.

More preferably, the limiting member 64 is a limiting round bar, which is parallel to the rotation axis of the backrest bracket 20 and located on the front side of the lower bracket 63 . Further, a limiting slot 6331 is defined on the front side of the lower bracket 63 , and the limiting slot 6331 is an arc-shaped slot opening toward the limiting round bar. When the backrest bracket 20 is in the first gear position, the limiting round bar is inserted into the limiting groove 6331 and abuts against the groove wall of the limiting groove 6331,

Further, the lower end of the sliding rod 62 is provided with a lower limiting portion 623 . The lower limiting portion 623 is located outside the sliding sleeve portion 631 and can abut with the lower end face of the sliding sleeve portion 631 . The lower limiting portion 623 is used to prevent the sliding rod 62 from tilting. The sliding sleeve part 631 is disengaged up and down. Preferably, the upper limiting portion 622 is integrally formed with the sliding rod 62 , and the lower limiting portion 623 is detachably connected to the sliding rod 62 . The upper limit portion 622 is preferably, but not limited to, a limit piece, and the lower limit portion 623 is preferably, but not limited to, a screw.

In order to facilitate the rotational connection between the sliding rod 62 and the pivot shaft 66 , the upper end of the sliding rod 62 is connected with a mounting seat 65 , the mounting seat 65 is connected with the upper limit portion 622 , and the mounting seat 65 is rotatably connected with the pivot shaft 66 . The mounting seat 65 has a U-shaped structure with an opening away from the sliding rod 62 . The two side plates of the U-shaped structure are provided with pivot holes through which the pivot shaft 66 penetrates and fits with the pivot holes. The pivot shaft 66 is provided with an axial limit structure that prevents the mounting seat 65 from moving axially along the pivot seat. The axial limit structure can be any existing structure that can achieve axial limit, and the present invention does not apply to this. make specific restrictions.

Preferably, in order to facilitate the processing and assembly of the lower bracket 63, the lower bracket 63 further includes a mounting frame portion 632 and an adapter frame portion 633. The mounting frame portion 632 has a plate-like structure parallel to the mounting plate 2, and the mounting frame portion 632 passes through The rack rotating shaft 67 is rotatably connected with the mounting plate 2 . The adapter frame portion 633 is connected to the upper side of the mounting frame portion 632 , a limiting groove 6331 is defined at the bottom of the adapter frame portion 633 , and a sliding sleeve portion 631 is connected to the front side of the adapter frame portion 633 . Preferably, the adapter frame portion 633 and the mounting frame portion 633 and the sliding sleeve portion 631 are all connected by welding.

Embodiment 2

As shown in FIG. 9 , this embodiment provides a wheelchair, which includes the wheelchair bracket in the first embodiment, and further includes a power assembly disposed on the rear side of the wheelchair bracket.

As shown in FIGS. 10 and 11 , the wheelchair support of the wheelchair and the power assembly 40 of the wheelchair are detachably connected through a connection structure, the connection structure includes at least two connection components, and the two connection components are arranged at intervals along the height direction of the wheelchair. The connection assembly includes a lap block and a lap rod, one of the lap block and the lap rod is arranged on the wheelchair bracket, the other of the lap block and the lap rod is arranged on the power assembly 40, and the lap block is arranged on the power assembly 40. There are grooves for accommodating the lap bars, the grooves on the two lap blocks are in opposite directions, and at least one locking hook is rotatably provided on the wheelchair bracket or the power assembly 40 , and the wheelchair bracket is connected with the power assembly 40 When the lap lever is lapped into the corresponding groove, the locking hook is rotated to the locking position, and at least one lap lever is closed between the lap block and the locking hook.

In this embodiment, the power assembly 40 includes a power assembly body and a drive wheel disposed on the power assembly body. The drive wheel is connected to a motor, so that the motor drives the drive wheel to rotate. The power assembly 40 is used as the power source of the entire wheelchair, and the power assembly 40 is detachably connected with the wheelchair bracket, so as to realize the movement of the wheelchair bracket driven by the power assembly 40 . The lap block and the locking hook are arranged on the wheelchair bracket, and the lap bar is arranged on the power assembly 40 . The function of the locking hook is to limit the lap rod and prevent the lap rod from separating from the lap block. When the wheelchair bracket and the power assembly 40 are in a connected state, the lap bar overlaps with the lap block, that is, the lap bar is located in the groove of the lap block and abuts against the groove bottom of the groove. The locking hook is rotatably connected with the wheelchair bracket, and the locking and loosening of the lap rod can be realized by rotating the locking hook. Since the notches of the grooves on the two lap blocks face opposite directions,

Specifically, among the two lap blocks, the notch of the groove of the upper lap block is set upward, and the notch of the groove of the lower lap block is set downward, so only one locking hook is required to lock One of the connection components can realize the fixation of the two connection components, and realize the connection and fixation of the wheelchair bracket and the power assembly 40 .

The lap block and the locking hook can be made of a plate, and the lap rod can be made of a pipe or a bar, which is convenient to manufacture. When installing, just lap the lap bar located on the powertrain 40 with the groove of the lap block on the wheelchair bracket, and turn the locking hook to close at least one lap bar in the groove of the lap block. The installation and fixation of the wheelchair bracket and the power assembly 40 can be realized, which has the characteristics of simple structure and convenient installation.

Specifically, the two connecting assemblies are a first connecting assembly and a second connecting assembly, the first connecting assembly is located above the wheelchair, and the second connecting assembly is located below the wheelchair.

The first connecting assembly includes a first lap block 24 and a first lap rod 401. The first lap block 24 is installed on the wheelchair bracket, the first lap rod 401 is installed on the power assembly 40, and the locking hook is installed on the wheelchair bracket. On the wheelchair bracket, the locking hook and the first lap block 24 are arranged at intervals along the width direction of the wheelchair bracket, the locking hook has a hook portion for hooking the first lap rod 401 , and the wheelchair bracket is connected to the power assembly 40 , the hook portion of the locking hook hooks the first lap lever 401 and restricts the first lap lever 401 in the first groove 241 on the first lap block 24 .

Specifically, the first lap block 24 is provided with a first groove 241 for accommodating the first lap rod 401 , and the size of the first groove 241 decreases sequentially from the notch of the first groove 241 to the groove bottom. It can be understood that, during the installation process, the second lap bar 402 located below is first overlapped with the second lap block 50 to pre-fix the wheelchair bracket and the power assembly 40, and then the first lap bar is lapped. 401 is close to the first overlapping block 24 , the locking hook is rotated, and the hook portion of the locking hook hooks the first overlapping rod 401 and moves into the first groove 241 of the first overlapping block 24 . Since the notch of the first groove 241 of the first lap block 24 is upward, and the notch of the groove of the second lap block 50 is downward, in order to facilitate the first lap rod 401 to enter the first groove 241, the first The size of the groove 241 decreases sequentially from the notch to the groove bottom, that is, the opening of the first groove 241 is trumpet-shaped to facilitate the entry of the first lap rod 401 .

The second connecting assembly includes a second lap block 50 arranged on the wheelchair bracket and a second lap rod 402 arranged on the power assembly 40. The second lap block 50 is detachably connected to the wheelchair bracket, and the second lap joint The block 50 has a second groove 501 for receiving the second tie rod 402 . In the connected state, the second lap rod 402 is inserted into the second groove 501 .

In this embodiment, the second lap block 50 is a U-shaped wear-resistant metal piece. The width of the second groove 501 is the same, and the size of the groove bottom of the second groove 501 is matched with that of the second overlapping rod 402, so that after the second overlapping rod 402 is inserted into the second groove 501, the second overlapping rod 402 Can abut with the second groove 501 . Since there is strong extrusion and friction between the second lap bar 402 and the groove wall of the second groove 501 , the second lap block 50 is made of wear-resistant metal material.

The second lap rod 402 is connected with the power assembly 40 by screws, so as to facilitate replacement when the second groove 501 is worn out and deformed, so as to avoid the second lap rod 402 in the second groove due to the wear of the second groove 501 There is movement in 501, which causes looseness between the wheelchair bracket and the powertrain 40.

Specifically, there are two first connecting assemblies and two second connecting assemblies, the two first connecting assemblies are arranged at intervals along the width direction of the wheelchair, and the two second connecting assemblies are arranged at intervals along the width direction of the wheelchair. It can be understood that the wheelchair has a certain width, and the width of the wheelchair is greater than the width of the human body. Therefore, in order to ensure the stable connection between the wheelchair bracket and the power assembly 40, two first and second connecting assemblies are arranged at intervals along the width direction of the wheelchair, and both the first connecting assembly and the second connecting assembly are arranged in the width direction of the wheelchair. near the end.

Specifically, the connecting structure further includes a third connecting assembly, the third connecting assembly is located between the first connecting assembly and the second connecting assembly, and the third connecting assembly includes a third overlapping block 60 disposed on the wheelchair bracket and The third lap rod 403 on the power assembly 40 is in a connected state, and the third lap rod 403 is lapped with the third lap block 60 . In this embodiment, the third connecting assembly is spaced apart from the first connecting assembly and the second connecting assembly, respectively. The provision of the third connection component is beneficial to increase the connection points between the wheelchair bracket and the power assembly 40 and improve the connection stability of the two.

In order to facilitate the smooth connection between the third lap bar 403 and the third lap block 60, the third lap block 60 is provided with a third groove for accommodating the third lap bar 403, and the notch of the third groove is vertically arranged. . It can be understood that, the three connecting components are arranged at intervals along the height direction of the wheelchair, the third overlapping block 60 is located in the middle position, and the notch of the third groove is arranged vertically, so that the third overlapping rod 403 can be inserted in the horizontal direction. in the third groove.

Specifically, the connection assembly further includes a base 404, which is used for installing the lap rod, the base 404 includes two supporting plates arranged at intervals, and the two ends of the lap rod are respectively penetrated on the two supporting plates. It can be understood that the lap rods pass through the two spaced support plates, and in the connected state, the non-ends of the lap rods are located in the grooves. The two support plates can play a limiting role in the length direction of the lap rod.

In this embodiment, the above-mentioned first lap block 24 is protruded on the rear side of the mounting plate 2 , the above-mentioned locking hook is formed on the mounting frame portion 632 , and the locking hook is provided with a locking groove. The first lap bar 401 is the limiting round bar in the first embodiment. When the backrest bracket 20 is in the folded state, the openings of the locking groove and the first groove 241 are set backwards, the locking hook and the first lap bar 401 are in a non-hook state, and the first lap bar 401 can be disengaged from the first lap bar 401. A groove 241 and a locking groove, that is, the power assembly 40 can be removed from the seat bracket; when the backrest support 20 is rotated to the first gear, the notch of the locking groove is set downward, and the first groove 241 The notch is inclined backward and upward, and the first overlapping rod 401 is located in the locking groove and cannot be disengaged from the first groove 241 and the locking groove. That is, when the backrest bracket is in the deployed locked state, the power assembly 40 is locked on the wheelchair bracket.

That is, the wheelchair bracket and wheelchair provided in this embodiment can switch between the locked and detachable states of the power assembly 40 on the wheelchair bracket through the rotation of the backrest bracket, so that the power assembly 40 can be easily disassembled and assembled, and This can effectively ensure the reliability of the setting of the powertrain 40 when the wheelchair bracket is in a deployed state.

Note that the above are only preferred embodiments of the present invention and applied technical principles. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and can also include more other equivalent embodiments without departing from the concept of the present invention. The scope is determined by the scope of the appended claims.

Claims (17)

1. A wheelchair support, comprising: Backrest bracket (20); a seat bracket (30), which is rotatably connected to the backrest bracket (20) through a backrest rotation shaft (7); An angle adjustment mechanism (10) includes an adjustment member (1), a linked rocker arm (3) and a locking member (5), the adjustment member (1) is fixedly connected to the backrest bracket (20), and the adjustment A plurality of tooth slots (121) are formed on the edge of the member (1), and the plurality of tooth slots (121) are arranged at intervals along the circumference of the backrest shaft (7), and the rocker arm (3) is rotatably mounted on On the outer side of the seat bracket (30), the locking member (5) is provided with protruding teeth (51), and the rotation of the rocker arm (3) can drive the locking member (5) to move so as to make the locking member (5) move. The protruding teeth (51) are snapped into or out of the tooth slots (121), and when the protruding teeth (51) are snapped into the tooth slots (121), the backrest bracket (20) and the seat bracket (30) Relative locking, when the protruding teeth (51) are disengaged from the tooth slots (121), the backrest bracket (20) can rotate relative to the seat bracket (30). 2. The wheelchair support according to claim 1, wherein the angle adjustment mechanism (10) further comprises a mounting plate (2), and the mounting plate (2) is fixedly connected to the seat support (30) , the mounting plate (2) and the adjusting member (1) are rotatably connected through the backrest shaft (7), and the rocker arm (3) and the locking member (5) are both arranged on the mounting plate ( 2) on. 3. The wheelchair support according to claim 2, characterized in that the locking member (5) is rotatably connected with the mounting plate (2), and the angle adjustment mechanism (10) further comprises a connecting rod (4), The connecting rod (4) is respectively connected with the rocker arm (3) and the locking piece (5), and the rocker arm (3) drives the locking piece (5) to rotate through the connecting rod (4). , so that the locking member (5) can be switched between the locking position and the unlocking position. When the locking member (5) is in the locking position, the protruding teeth (51) can be snapped into any of the tooth slots ( In 121), when the locking member (5) is in the unlocking position, the protruding teeth (51) are disengaged from the tooth slots (121). 4. The wheelchair support according to claim 3, wherein an actuating shaft (43) is protruded from one of the connecting rod (4) and the locking member (5), and the connecting rod (4) and the other one of the locking members (5) is provided with a long sliding hole (52), the actuating shaft (43) slides through the sliding hole (52), and when the actuating shaft (43) slides through the sliding hole (52). When the moving shaft (43) slides from the first end of the sliding hole (52) to the second end of the sliding hole (52), the locking member (5) is rotated and switched from the locking position to the unlocking Location. 5. The wheelchair bracket according to claim 4, wherein the sliding hole (52) is provided on the locking member (5), and when the actuating shaft (43) is located in the sliding hole (52) 52), the pressure angle of the connecting rod (4) where the actuating shaft (43) is located is a negative value. 6. The wheelchair support according to claim 4, wherein the angle adjustment mechanism (10) further comprises: A reset member, which is used to maintain or restore the locking member (5) to the locking position; and/or a folding locking structure for locking the relative positions of the backrest support (20) and the seat support (30) when the backrest support (20) is in a folded state; and/or a stop structure for keeping the locking member (5) in an unlocked position during the folding or unfolding of the backrest bracket (20); and/or The deployment limiting structure is used to limit the maximum deployment angle of the backrest bracket (20) relative to the seat bracket (30). 7. The wheelchair bracket according to claim 6, wherein the folding locking structure comprises a limiting protrusion (8) protrudingly arranged on the adjusting member (1), the limiting protrusion (8) ) has a limit slope (81), when the backrest bracket (20) is in the folded state, the limit slope (81) extends obliquely upward from the rear side to the front side of the wheelchair bracket, and the One end of the connecting rod (4) away from the rocker arm (3) abuts on the limiting slope (81). 8. The wheelchair support according to claim 7, characterized in that, the stop structure comprises a rib (9) protruding on the adjusting member (1), and the first side of the rib (9) The end is connected with the limiting protrusion (8), the second end of the retaining edge (9) extends backward in a direction away from the limiting protrusion (8), and the retaining edge (9) is far away from the limiting protrusion (8). An abutting surface (91) is formed on one side of the backrest rotating shaft (7), and the distance between the abutting surface (91) and the backrest rotating shaft (7) is from the first end to the second side of the rib (9). The ends gradually increase, and the end of the connecting rod (4) can be pressed against the abutting surface (91). 9. The wheelchair support according to claim 8, wherein the stop structure comprises a guide surface (122) provided at the edge of the adjusting member (1), and the guide surface (122) is located on the One side of the tooth slot (121) in the counterclockwise direction, and when the backrest bracket (20) is rotated from the folded state to the unfolded locking state, the protruding teeth (51) can slide along the guide surface (122) into one of the tooth slots (121) closest to the guide surface (122). 10. The wheelchair bracket according to claim 9, wherein the stop structure is configured such that when the connecting rod (4) abuts against the abutting surface (91), the protruding teeth (51) Non-contact with the guide surface (122); when the connecting rod (4) is located on the side of the rib (9) away from the limiting protrusion (8), the protruding teeth ( 51) Slide and abut on the guide surface (122). 11. The wheelchair bracket according to claim 8, characterized in that, a blocking hook portion (92) extends from the second end of the baffle (9) in a direction toward the backrest rotation shaft (7), and the blocking The hook portion (92) can abut on the side wall of the link (4). 12. The wheelchair support according to claim 6, characterized in that, the deployment limiting structure comprises a limiting baffle (15) protruding from the outer side of the adjusting member (1), when the protruding teeth (51) ) is snapped into one of the tooth slots (121) on the rearmost side, and the limiting baffle (15) is in contact with the mounting plate (2) to restrict the backrest bracket (20) from continuing to turn backwards. 13. The wheelchair support according to any one of claims 1-12, wherein the angle adjustment mechanism (10) further comprises a shock-absorbing spring (61), the shock-absorbing spring (61) is used for When the protruding teeth (51) are snapped into the tooth grooves (121), a moment is applied to the backrest bracket (20) for urging the backrest bracket (20) to rotate clockwise. 14. The wheelchair support according to any one of claims 1-12, characterized in that, when the backrest support (20) is in a folded state, the backrest support (20) is positioned on the seat in parallel and spaced apart Just above the bracket (30). 15. The wheelchair bracket according to any one of claims 2-12, wherein the locking member (5) comprises a main body (53), and one end of the main body (53) is connected to the mounting plate (2). ) rotating connection, the other end of the main body part (53) is protruded with the convex teeth (51) in the direction toward the backrest rotating shaft (7), the convex teeth (51) are trapezoidal teeth, and the trapezoid The big ends of the teeth are connected to the main body (53). 16. A wheelchair, characterized by comprising the wheelchair support according to any one of claims 1-15. 17. The wheelchair according to claim 16, characterized in that, the wheelchair further comprises a power assembly (40), and a first lap rod (401) is provided on the power assembly (40), and the angle The adjustment mechanism includes a locking hook arranged in linkage with the backrest bracket (20), and when the backrest bracket (20) is rotated until the protruding teeth (51) are locked into the tooth slots (121) on the frontmost side, The locking hook hooks the first lap rod (401) to lock the power assembly (40) and the wheelchair bracket, and when the backrest bracket (20) is in a folded state, the locking The hook is rotated to disengage from the first tie rod (401), and the power assembly (40) can be removed from the wheelchair support.

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