CN117064649A - A standing wheelchair - Google Patents

Abstract

The application belongs to the technical field of wheelchair design, and particularly relates to a standing wheelchair. The standable wheelchair comprises a chassis assembly and a seat assembly; the seat assembly comprises a backrest, a seat, pedals, a seat back angle adjusting mechanism, a seat surface angle adjusting mechanism and a pedal angle adjusting mechanism; the pedal is hinged with the seat; the pedal angle adjusting mechanism is used for adjusting the included angle between the pedals and the seat; the chassis assembly is used for supporting the seat above; the backrest is connected with the seat; the chair back angle adjusting mechanism is used for adjusting the included angle between the backrest and the chair; the seat angle adjusting mechanism is used for adjusting the inclination angle of the seat. The wheelchair can be adjusted to a standing state, and standing training is realized.

Description

A standing wheelchair

Technical field

The invention belongs to the technical field of wheelchair design, and specifically relates to a standing wheelchair.

Background technique

Wheelchairs are commonly used nursing equipment and are widely used in the medical field. Wheelchair users are generally those with weak lower limb strength, and patients in the recovery period usually need rehabilitation training such as standing.

Providing a multifunctional wheelchair that can stand and sit can meet the various needs of patients and reduce the number of medical devices that patients need to purchase. Most existing wheelchairs can only be used as ordinary wheelchairs.

Contents of the invention

In order to solve the deficiencies of the prior art, the present invention provides a standing wheelchair that can adjust the wheelchair to a standing state to achieve standing training.

In order to solve the deficiencies of the existing technology, the technical solutions provided by the present invention are:

A standing wheelchair, including a chassis assembly and a seat assembly;

The seat assembly includes a backrest, a seat, a footrest, a chairback angle adjustment mechanism, a seat surface angle adjustment mechanism and a footrest angle adjustment mechanism;

The footrest is hingedly connected to the seat;

The footrest angle adjustment mechanism is used to adjust the angle between the footrest and the seat;

The chassis assembly is used to support the upper seat;

The backrest is connected to the seat;

The chair back angle adjustment mechanism is used to adjust the angle between the backrest and the seat;

The seat angle adjustment mechanism is used to adjust the inclination angle of the seat.

Preferably, the seat includes a connected chair frame and a seat cushion; the backrest includes a connected back frame and cushion; the footrest is hinged with the chair frame; the chair frame is assembled with the chassis connect.

Preferably, the chair back angle adjustment mechanism includes an angle adjustment driving mechanism, a transmission rod, a driving gear, a transmission gear and a backrest connecting plate; the angle adjustment driving mechanism is connected to the chair frame and is drivingly connected to the transmission rod. ; The driving rod is connected to the driving gear; the driving gear is drivingly connected to the driving gear; the driving gear is connected to the backrest connecting plate; the backrest connecting plate is connected to the back frame.

Preferably, the chair back angle adjustment mechanism also includes a motor mounting plate, a spline shaft, a turntable and a fixed plate;

The angle drive mechanism is an angle-adjusting motor; the angle-adjusting motor is connected to the motor mounting plate; the motor mounting plate is fixed on the chair frame through a connecting shaft;

The backrest connection plate includes a backrest connection part and a transmission connection part; the backrest connection part is inserted into the back frame and connected with the back frame;

The driving gear is fixed at both ends of the transmission rod; the driving gear is drivingly connected to the transmission gear;

The spline shaft is fixedly connected to the transmission gear; the fixed plate, the turntable, the transmission connection part, and the transmission gear are sequentially sleeved on the spline shaft; the transmission connection part is fixedly connected to the spline shaft, and the transmission connection part is fixed around the turntable The plate rotates; the fixed plate is fixedly connected to the chair frame, and is rotationally connected to the transmission rod through a shaft sleeve.

Preferably, the backrest connection plate is in the shape of a folded line, and the angle between the central axis of the backrest connection part and the central axis of the transmission connection part is greater than 90 degrees.

Preferably, the seat angle adjustment mechanism includes a linear drive device, a bracket, a bracket rotating shaft and a drive device connection piece;

The bracket is connected to the chassis assembly;

The bracket rotating shaft is connected to the bracket, and the bracket rotating shaft is rotationally connected to the chair frame;

The driving device connecting piece is connected to the bracket rotating shaft;

One end of the linear drive device is hinged to the chair frame, and the other end is hinged to the drive device connecting piece.

Preferably, the bracket includes a horizontal supporting part and a connecting part with a bottom connected to the supporting part;

The supporting part is connected to the chassis assembly; the connecting part is arranged obliquely;

The rotating shaft of the bracket is arranged horizontally and is fixedly connected to the upper end of the connecting part;

The linear drive device is perpendicular to the rotating axis of the bracket;

The connecting piece of the driving device is arranged obliquely, the upper end is fixedly connected to the rotating shaft of the bracket, and the lower end is hinged to the linear driving device.

Preferably, the seat angle adjustment mechanism also includes a seat installation shaft, a rotation locking groove, a rotation handle and a rotation pin;

The bracket is provided with vertical seat mounting holes;

The seat mounting shaft is set up vertically, and the lower end is connected to the chassis assembly, and is rotationally connected to the seat mounting hole through a tapered roller bearing;

The rotation locking groove is set horizontally, sleeved on the seat installation shaft, fixed to the seat installation shaft, located below the bracket, and has three notches on the outer periphery with angles of 0°, 90° and 180° respectively;

The rotating pin cooperates with the notch;

The rotating handle is connected to the lower end surface of the bracket and the rotating pin, and is used to control the unlocking and locking of the rotating pin and the notch.

Preferably, it also includes leg protection components and chest protection components;

The chest protector component is a strap connected to the backrest;

The leg protection assembly includes a mounting block connected to the footrest, a fixing seat fixedly connected to the mounting block, a fixing rod that penetrates into the fixing seat and is fixed by a locking screw, and the fixing rod is connected to the fixing rod through an automatic locking screw. An adjusting rod connected to the hinge assembly with damping, an adjusting nut fixedly connected to the adjusting rod, a supporting crossbar connected perpendicularly to the adjusting rod through an adjusting screw and the adjusting nut, two slidingly connected supporting crossbars and passing through The screw-locked slider seats are respectively connected to the two slider seats and soft pads that fit the legs. The adjustment screw passes through the support crossbar and is connected to the adjustment nut.

Preferably, casters are provided under the pedal;

The chassis assembly includes an auxiliary pedal; the auxiliary pedal is located between two driving wheels of the chassis assembly; a lifting mechanism for supporting and adjusting the height of the seat is connected above the chassis assembly.

Beneficial effects of the present invention:

In this application, the backrest and the seat are adjusted to be parallel through the chair back angle adjustment mechanism, the footrest and the seat are adjusted to be parallel through the foot pedal angle adjustment mechanism, and the seat is adjusted to an upright state through the seat surface angle adjustment mechanism. The standing wheelchair can be adjusted to a standing state, enabling standing training.

This application is equipped with casters and auxiliary pedals, which can improve the stability of the standing state and standing driving.

This application simultaneously adjusts the backrest and seat to 180°, and the footrest and chair surface to 180°, so that the wheelchair can be expanded into a bed of 1 meter and 1.8 meters long, which can be used as a nursing bed; in the nursing bed state, it can also be convenient for patients to move in the wheelchair. Transfer between beds.

This application combines the rotation function of the chair surface angle adjustment mechanism to rotate the seat to 90°, and can push the nursing bed laterally to the bedside. Combined with the lifting function, the seat surface can be adjusted to the same height as the bed, so that the user can maintain Easily transfer from bed to wheelchair in lying position.

This application can be further equipped with rehabilitation accessories to facilitate users to carry out rehabilitation training anytime and anywhere.

Description of the drawings

Figure 1 is a schematic diagram of the sitting posture of a standing wheelchair;

Figure 2(a) is a schematic diagram of a rear-wheel drive standing wheelchair;

Figure 2(b) is a schematic diagram of the front-wheel standing of the standing wheelchair;

Figure 3 is a schematic diagram of the back of the seat;

Figure 4 is a schematic diagram of the chair back angle adjustment mechanism;

Figure 5 is a schematic diagram of the chair back angle adjustment mechanism and the chair surface angle adjustment mechanism;

Figure 6 is a schematic diagram of the driving gear, transmission gear, and backrest connecting plate;

Figure 7 is a schematic diagram of the transmission gear and fixed plate;

Figure 8 is a schematic diagram of the backrest connection plate;

Figure 9 is a schematic diagram of the connection between the backrest connecting plate and the back frame;

Figure 10 is a schematic diagram of the seat angle adjustment mechanism;

Figure 11 is a schematic diagram of the bracket, the bracket rotating shaft and the drive device connector;

Figure 12 is a schematic diagram when the seat is tilted;

Figure 13 is a schematic diagram of the connection between the seat installation shaft and the chassis assembly;

Figure 14 is a schematic diagram of the connection between the seat installation shaft and the bracket;

Figure 15 is a schematic diagram of the pedal;

Figure 16 is a schematic diagram of the connection between the footrest connector and the chair frame;

Figure 17 is a schematic diagram of the leg protection assembly;

Figure 18 is a schematic diagram of the installation of the adjusting nut;

Figure 19 is a schematic diagram of the damping structure inside the hinge assembly;

Figure 20 is a schematic diagram of the damping sleeve;

Figure 21 is a schematic diagram of the hinge assembly;

Figure 22 is a schematic diagram of the connection between the hinge assembly, the fixed rod and the adjusting rod;

Among them, 1 is the seat; 11 is the chair frame; 12 is the cushion;

2 is the backrest; 21 is the back frame; 22 is the cushion; 23 is the headrest; 24 is the armrest; 25 is the backpack;

3 is the pedal; 31 is the pedal connector; 32 is the leg pad; 33 is the pedal angle adjustment mechanism; 34 is the caster;

41 is the angle-adjusting motor; 42 is the transmission rod; 43 is the driving gear; 44 is the transmission gear; 45 is the backrest connecting plate; 451 is the backrest connection part; 452 is the transmission connection part; 46 is the motor mounting plate; 47 is the connecting shaft; 48 is a spline shaft; 49 is a turntable; 410 is a fixed plate; 411 is a sleeve; 412 is a cover;

5 is the seat angle adjustment mechanism; 52 is the drive device connection piece; 53 is the bracket rotating shaft; 54 is the rotating handle; 55 is the rotating pin; 56 is the linear drive device; 57 is the seat installation hole; 59 is the seat installation shaft. ; 510 is the rotation locking groove; 511 is the bracket; 5111 is the supporting part; 5112 is the connecting part; 512 is the deep groove ball bearing; 513 is the transition support sleeve; 514 is the tapered roller bearing sleeve; 515 is the tapered roller bearing ;516 is the pallet fixing shaft;

6 is the chassis assembly; 61 is the chassis; 62 is the wheel bracket; 63 is the auxiliary wheel; 64 is the lifting mechanism; 65 is the battery; 66 is the auxiliary pedal; 67 is the driving wheel;

7 is the leg guard component; 71 is the cushion; 72 is the adjusting screw; 73 is the slider seat; 74 is the support crossbar; 75 is the adjusting rod; 76 is the hinge component; 761 is the first hinge; 762 is the second hinge; 763 It is the third hinge; 764 is the anti-loosening washer; 765 is the butterfly spring; 766 is the damping sleeve; 767 is the damping shaft; 768 is the fastening nut; 77 is the fixed rod; 78 is the fixed seat; 79 is the mounting block; 710 is the adjusting nut; 711 is the locking screw.

Detailed ways

The present invention will be further described below in conjunction with the embodiments. The following embodiments are only used to illustrate the technical solutions of the present invention more clearly, but cannot be used to limit the scope of the present invention.

A standing wheelchair, see Figure 1, includes a chassis assembly 6 and a seat assembly; the seat assembly includes a backrest 2, a seat 1, a footrest 3, a chair back angle adjustment mechanism, a chair surface angle adjustment mechanism 5 and Foot pedal angle adjustment mechanism 33. The chassis assembly 6 is used to support the seat 1 above. The footrest 3 is hinged to the seat 1. The footrest angle adjustment mechanism 33 is used to adjust the angle between the footrest 3 and the seat 1 . The backrest 2 is connected to the seat 1. The chair back angle adjustment mechanism is used to adjust the angle between the backrest 2 and the seat 1. The seat angle adjustment mechanism 5 is used to adjust the inclination angle of the seat 1 .

As shown in Figure 13, the chassis assembly 6 includes a chassis 61, a wheel bracket 62, an auxiliary wheel 63, a driving wheel 67, a battery 65, a wheel driver, etc. The existing chassis assembly 6 can be used.

The angle between the footrest 3 and the seat surface can be adjusted arbitrarily within the range of 90 to 180° through the footrest angle adjustment mechanism 33, and the length of the footrest is adjustable at the same time. The footrest angle adjustment mechanism 33 adopts an existing adjustment mechanism, which can satisfy the need for the footrest 3 and the seat to be adjustable within a range of 90 to 180°. For example, the footrest angle adjustment scheme disclosed in the patent CN201711146026.7 is optional.

During use, the backrest 2 and the seat 1 are adjusted to be parallel through the chair back angle adjustment mechanism, the footrest 3 and the seat 1 are adjusted to be parallel through the foot pedal angle adjustment mechanism 33, and the seat 1 is adjusted through the seat surface angle adjustment mechanism 5. After adjusting to the upright state, the standing wheelchair can be adjusted to the standing state shown in Figure 2(a) and Figure 2(b) to achieve standing training.

In this application, casters 34 are provided under the pedal 3, as shown in Figure 2(a) and Figure 2(b). In the standing state, the casters 34 can be used as auxiliary support points, which is stable and reliable.

In this application, an auxiliary pedal 66 is added to the chassis assembly 6. The auxiliary pedal 66 is connected to the wheel bracket 62 and is located between the two driving wheels 67.

As shown in Figure 2(a), in the rear-wheel drive standing state, the driving wheels 67 are at the rear. When the patient stands, the casters 34 serve as auxiliary support points. At this time, the patient can do standing training, but because the center of gravity is forward at this time, , the friction force of the driving wheel 67 is not enough to enable the standing wheelchair to travel. As shown in Figure 2(b), in the forward standing state, the driving wheel 67 is in front. When the patient stands, the pedal of the footrest 3 is on the auxiliary pedal 66, the center of gravity falls on the axis of the driving wheel 37, and the caster 34 touches the ground. Used as an anti-roll wheel, it can be used for standing training and standing driving.

When in use, the backrest 2 and the seat 1 can also be adjusted to 180°, and the footrest 3 and the seat 1 can be adjusted to 180° at the same time. The seat 1 can be adjusted to a horizontal state through the seat angle adjustment mechanism 5, and the standing wheelchair can be The whole bed is adjusted to a horizontal state and used as a nursing bed; at the same time, this state can also facilitate the patient's transfer between the wheelchair and the bed.

Specifically, referring to FIGS. 1 and 3 , the seat 1 includes a connected chair frame 11 and a seat cushion 12 . The backrest 2 includes a connected back frame 21 and a back cushion 22; the footrest 3 is hingedly connected to the chair frame 11. The chair frame 11 is connected to the chassis assembly 6 . The back cushion 22 is also provided with a headrest 23. The footrest 3 is also provided with leg pads 32 .

Specifically, see Figure 4, Figure 5, Figure 6 and Figure 9. The chair back angle adjustment mechanism includes an angle adjustment drive mechanism, a transmission rod 42, a driving gear 43, a transmission gear 44 and a backrest connecting plate 45; the angle adjustment drive mechanism and the seat The chair frame 11 of the chair 1 is connected to the driving rod 42; the driving rod 42 is connected to the driving gear 43; the driving gear 43 is drivingly connected to the driving gear 44; the driving gear 44 is connected to the backrest connecting plate 45; the backrest connecting plate 45 is connected to the backrest connecting plate 45. The back frame 21 of the backrest 2 is connected. The angle-adjusting driving mechanism is an angle-adjusting motor 41. The transmission rod 42 may be a hexagonal rod. The angle-adjusting motor 41 rotates around the axis. The angle-adjusting motor 41 drives the transmission rod 42 to rotate. The rotation of the transmission rod 42 drives the driving gear 43 to rotate. The rotation of the driving gear 43 drives the transmission gear 44 to rotate. The transmission gear 44 is fixedly connected to the backrest connecting plate 45, thereby Drive the backrest 2 to rotate, so that the angle between the backrest 2 and the seat 1 can be adjusted arbitrarily within the range of 0 to 180°.

Specifically, referring to Figures 7 and 8, the chair back angle adjustment mechanism also includes a motor mounting plate 46, a spline shaft 48, a turntable 49 and a fixed plate 410; the backrest connection plate 45 includes a backrest connection part 451 and a transmission connection part 452. Referring to FIG. 5 , the angle-adjusting motor 41 is connected to the motor mounting plate 46 , and the motor mounting plate 46 is fixed on the chair frame 11 through the connecting shaft 47 . The driving gear 43 is fixed at both ends of the transmission rod 42; the driving gear 43 is drivingly connected to the transmission gear 44 close to the backrest 2. Referring to Figure 7, the spline shaft 48 and the transmission gear 44 are welded and fixed; the fixed plate 410, the turntable 49, the transmission connection part 452 of the backrest connection plate 45, and the transmission gear 44 are sequentially arranged and sleeved on the spline shaft 48, and the transmission connection part 452 Fixedly connected to the spline shaft 48, the transmission connection part 452, the transmission gear 44, and the spline shaft 48 as a whole can rotate around the fixed plate 410 through the turntable 49; the fixed plate 410 is fixedly connected to the chair frame 11, and is connected to the transmission rod 42 through The shaft sleeve 411 is rotatably connected. In addition, referring to FIGS. 3 and 4 , the chair back angle adjustment mechanism also includes a cover 412 , which is sleeved on the transmission gear 44 , the fixed plate 410 , the turntable 49 , and the spline shaft 48 . Referring to FIG. 8 , the backrest connecting plate 45 is in the shape of a folded line, and the angle between the central axis of the backrest connecting part 451 and the central axis of the transmission connecting part 452 is greater than 90 degrees. Referring to FIG. 9 , the backrest connection part 451 is inserted into the back frame 21 and connected with the back frame 21 .

During use, the rotation of the transmission gear 44 drives the backrest connecting plate 45 to rotate around the fixed plate 410, thereby realizing the rotation of the backrest 2 around the seat 1. And setting the backrest connecting plate 45 to a folded line type can ensure that the back frame 21 can be rotated to a position that is completely flush with the chair frame 11, so that the seat cushion 12 and the back cushion 22 can be completely parallel, solving the problem that the backrest 2 cannot be adjusted to the position in the prior art. Technical issue with seat 1 being parallel.

In an optional embodiment of the present invention, referring to Figures 1, 5, 10, 11 and 12, the seat angle adjustment mechanism includes a linear drive device 56, a bracket 511, a bracket rotating shaft 53 and a drive device connection piece 52; The bracket 511 is connected to the chassis assembly 12; the bracket rotating shaft 53 is connected to the bracket 511, and the bracket rotating shaft 3 is rotationally connected to the chair frame 11; the driving device connecting piece 52 is connected to the bracket rotating shaft 53; the linear drive device 56 One end is hinged with the chair frame 11 through the connecting shaft 47, and the other end is hinged with the driving device connecting piece 52. When in use, the chair frame 11 is fixed on the chassis assembly 6 through the bracket 511, the bracket rotating shaft 53, and the linear drive device 56. When it is necessary to adjust the angle of the seat surface, the length of the linear drive device 56 is changed, the chair frame 11 is rotated around the bracket axis 53, and the inclination angle of the seat surface is changed.

In a preferred embodiment of the present invention, referring to Figure 5, the linear drive device 56 is a push rod motor, a pneumatic cylinder or a hydraulic cylinder.

In the preferred embodiment of the present invention, referring to Figures 10, 11 and 12, the bracket includes a horizontally arranged supporting portion 5111 and a connecting portion 5112 with the bottom connected to the supporting portion 5111; the supporting portion 5111 is connected to the chassis assembly 12 connection; the connecting part 5112 is arranged obliquely, and the bracket rotating shaft 53 is fixedly connected to the upper end of the connecting part 5112. The bracket rotating shaft 53 is arranged horizontally. The two ends of the linear drive device 56 are respectively located on both sides of the center of the seat surface. The hinged end of the linear drive device 56 and the chair frame 11 is close to the backrest 2 . The linear drive device 56 is perpendicular to the bracket rotation axis 53 . The driving device connecting piece 52 is arranged obliquely, the upper end is fixedly connected to the bracket rotating shaft 53, and the lower end is hinged to the linear driving device 56. The seat angle adjustment mechanism can achieve stepless adjustment of the inclination angle of the seat 1 within the range of -15°-90°. When the linear drive device 56 is a push rod motor, the push rod motor mounting base can be installed on the back of the chair frame 11 close to the backrest 2, that is, when the push rod motor extends, the connection between the chair frame 11 and the backrest 2 tilts upward ( Figure 10). Of course, in other embodiments of the present invention, the hinged end of the linear drive device 56 and the chair frame 11 is far away from the backrest, and the bracket rotation axis is located close to the chair frame 11. When the push rod motor is extended, the chair frame 11 The connection with the backrest slopes downward.

In an optional embodiment of the present invention, referring to Figures 11 and 13, the seat angle adjustment mechanism also includes a seat mounting shaft 59, and the supporting portion 5111 of the bracket 511 is provided with a vertical seat mounting hole 57; The chair mounting shaft 59 is set up vertically, and its lower end is connected to the chassis assembly 6 and is rotationally connected to the seat mounting hole 57 through a tapered roller bearing 515.

In an optional embodiment of the present invention, referring to FIG. 14 , the seat angle adjustment mechanism also includes a deep groove ball bearing 512 , a transition support sleeve 513 , a tapered roller bearing sleeve 514 , a tapered roller bearing 515 and a tray fixing shaft 516 . The tapered roller bearing 515 is set on the seat installation shaft 59 and is fixed with the seat installation shaft 59; the tapered roller bearing set 514 is set on the tapered roller bearing 515 and is rotationally connected with the tapered roller bearing 515. The seat mounting hole 57 of the supporting part 5111 is fixedly connected. The transition support sleeve 513 is located above the tapered roller bearing sleeve 514 and is fixedly connected to the tapered roller bearing sleeve 514 and the seat mounting hole 57. The sleeve is set on the seat mounting shaft 59 The outer ring is not in contact with the seat installation shaft 59; the deep groove ball bearing 512 is located above the transition support sleeve 513, the outer ring is fixedly connected with the transition support sleeve 513 and the seat installation hole 57, and the inner ring is fixedly connected with the upper part of the seat installation shaft 59 , the upper end of the seat installation shaft 59 is connected to the tray fixing shaft 516 through threads. The tray fixed shaft 516 is located above the deep groove ball bearing 512 and compresses the inner ring of the deep groove ball bearing 512 to prevent shaking. The tray fixed shaft 516 can rotate synchronously with the seat installation shaft 59.

In an optional embodiment of the present invention, referring to Figures 3, 12 and 13, the seat angle adjustment mechanism also includes a rotation locking groove 510, a rotation handle 54 and a rotation pin 55; the rotation locking groove 510 is set horizontally and is sleeved on The seat installation shaft 59 is fixed to the seat installation shaft 59 and is located below the supporting part 5111. There are multiple notches with different angles (such as 0°, 90° and 180°, etc.) on the outer periphery; the rotating handle 54 and the bracket The lower end surface of 511 is connected to the rotating pin 55; the rotating pin 55 cooperates with the notch. The rotating handle 4 is an existing component and is no longer shown. It specifically includes a handle bracket, a rotating handle and a torsion spring. The handle bracket is connected to the lower end surface of the bracket 11. The rotating handle can rotate around the handle bracket, connect with the rotating pin 5 and drive The rotation of the rotary pin 5 causes the rotary pin 5 to disengage from the rotary lock groove 10 . The torsion spring is provided in the handle bracket. After the operator releases the rotary handle, the torsion spring can reset the rotary pin 5 and lock the rotary lock groove 10 . Turn the rotating handle to pull out the rotating pin 55 and release the lock between the rotating pin 55 and the notch. The seat 2 can be rotated around the seat installation axis 59. After reaching the predetermined position, the rotating pin 55 is inserted into the notch in the rotating lock groove. Realize seat 2 locking. That is to say, the present invention can further change the rotation angle of the seat 2 along the horizontal plane to realize the 90°/180° rotation function, and realize transverse driving, front-wheel drive standing, and front-wheel drive driving. At the same time, when the patient is transferred between the bed and the wheelchair, the rotation function further reduces the difficulty of docking the bed and the wheelchair.

In an optional embodiment of the present invention, see FIG. 13 , a lifting mechanism 64 for supporting and adjusting the height of the seat is connected above the chassis assembly 6 . The lifting mechanism 64 is a push rod motor or a hydraulic cylinder. The lifting mechanism 64 is provided on the chassis, and the upper end of the lifting mechanism is connected to the seat installation shaft 59 . When in use, the lifting mechanism 64 uses the seat installation shaft 59, the rotation locking groove 510 connected to the seat installation shaft 59, the upper seat surface angle adjustment mechanism, the backrest 2, the seat 1, the seat back angle adjustment mechanism and other components as one Lift as a whole. In the standing state of the rear drive shown in Figure 2(a), the lifting function facilitates adjusting the casters 34 on the footrest 3 to the ground state; in the standing state of the front drive shown in Figure 2(b), the lifting function facilitates adjusting the casters 34 on the footrest 3 to the ground state. The casters 34 on the footrest 3 are adjusted to the grounding state, and the pedal of the footrest 3 is lowered to the auxiliary pedal 66; in the nursing bed state, the lifting function facilitates adjusting the height of the seat 2 to be flush with the bed, and the user can maintain the lying position and easily move from Transfer from bed to wheelchair.

In an optional embodiment of the present invention, both sides and the front side of the chair frame 11 are profiles with T-shaped grooves; both sides of the back frame 21 are profiles with T-shaped grooves. Referring to Figures 15 and 16, the footrest 3 is hinged with the footrest connector 31. The footrest 3 is connected to the front side of the chair frame 11 through the footrest connector 31 that matches the T-shaped slot and then locked with screws. After loosening the screws, the pedal 3 can slide along the T-shaped slot and can be easily slid out from both sides of the T-shaped slot for easy disassembly. The universal T-shaped slots of the same specifications make it easy to match a variety of accessory structures that are beneficial to self-care and rehabilitation exercises according to the actual needs of the patient. They are also easy to assemble and disassemble, making the standing wheelchair also have rehabilitation training functions.

In an optional embodiment of the present invention, the standing wheelchair further includes a leg protection component 7 and a chest protection component. The leg protection component 7 and the chest protection component are both connected to the backrest 2 and are used to provide support to the patient's chest when the patient is standing, so that the patient can fit tightly on the seat surface. The chest protection component can be a strap. The leg protection assembly 7 is used to provide protection and support to the patient's knees in a standing state.

Specifically, referring to Figures 17 and 18, the leg protection assembly 7 includes a mounting block 79 connected to the footrest 3, a fixing base 78 fixedly connected to the mounting block 79, and a fixing member that penetrates into the fixing base 78 and is fixed by locking screws 711. The height of the rod 77 and the fixed rod 77 are adjustable in multiple levels. The adjusting rod 75 is connected to the fixed rod 77 through a hinge assembly 76 with self-damping. The adjusting nut 710 is fixedly connected to the adjusting rod 75. The adjusting screw is vertical to the adjusting rod 75. 72 The support crossbar 74 connected to the adjustment nut 710 and the adjustment screw 72 pass through the support crossbar 74 and are connected to the adjustment nut 710. Two slider seats 73 are slidably connected to the support crossbar 74 and locked by screws. A soft pad 71 is connected to the slider seat 73 and fits the leg.

By adjusting the length of the adjusting screw 72 screwed into the adjusting nut 710, the gap between the cushion 71 and the leg can be changed. The distance between the two cushions 71 is changed by sliding the slider seat 73 along the support crossbar 74 so that the cushions 71 can fit the legs. The adjusting rod 75 can rotate around the fixed rod 77 through the hinge assembly 76 to adjust the angle of the soft cushion 71 . Take out the locking screw 711 to adjust the height of the fixing rod 77. After adjusting the height of the cushion 71, lock it with the locking screw 711.

Referring to Figures 19-22, the hinge assembly 76 includes a first hinge 761, a second hinge 762, a third hinge 763, a lock washer 764, a butterfly spring 765, a damping sleeve 766, a damping shaft 767 and a fastening nut 768. The damping sleeve 766 is set on the damping shaft 767. A friction surface is provided at the contact point between the damping sleeve 766 and the damping shaft 767. An anti-loosening washer 764, a plurality of butterfly springs 765, and anti-loosening are sequentially pressed into the cavity of the damping sleeve 766. The gasket 764, the anti-loosening washer 764, the butterfly spring 765, and the anti-loosening washer 764 are set on the damping shaft 767. The fastening nut 768 is threadedly connected to the outermost end of the damping shaft 767 and the anti-loosening washer 764, butterfly Press the spring 765 and the anti-loosening washer 764. By adjusting the tightness of the fastening nut 768, the friction force between the friction surface of the damping sleeve 766 and the damping shaft 767 is adjusted relative to each other. The first hinge 761, the second hinge 762, and the third hinge 763 are arranged in sequence. The first hinge 761 cooperates with the outer peripheral surface of the damping shaft 767, the first hinge 761 cooperates with the second hinge 762, and the second hinge 762 cooperates with the outer circumferential surface of the damping sleeve 766. The outer peripheral surface cooperates, the second hinge 762 cooperates with the third hinge 763 , the first hinge 761 is connected with the third hinge 763 and then connected with the fixed rod 77 , and the second hinge 762 is connected with the adjusting rod 75 . The angle adjustment of the adjusting rod 75 and the fixed rod 77 is achieved by the relative rotation of the damping sleeve 766 and the damping shaft 767 .

In an optional embodiment of the present invention, the standing wheelchair also includes a controller, which can be a handheld external controller, and the controller is connected with a foot angle adjustment mechanism, an angle adjustment motor, a wheel driver, a linear drive device, and a lifting mechanism. and other communication connections, making it convenient for users to control the forward, backward, rotation, backrest posture, chair surface posture, foot pedal posture, chair surface lifting, front-wheel drive standing, front-wheel drive driving, rear-wheel drive standing, etc. of the wheelchair through the controller.

In an optional embodiment of the present invention, the wheelchair that can be expanded into a nursing bed also includes a support handle 8, which is located on the back of the back frame 21 of the backrest and is preferably a telescopic rod. When the standing wheelchair is adjusted to a nursing bed, adjust the length of the support handle to touch the ground and use it as a supporting leg to avoid the risk of tipping over and improve the stability of the nursing bed. When the standing wheelchair posture is wheelchair or standing, the length of the support handle can be shortened.

In an optional embodiment of the present invention, referring to Figure 1, the backrest 2 is also provided with an armrest 24, and the backrest 2 is also provided with a backpack 25.

The above are only preferred embodiments of the present invention. It should be noted that those of ordinary skill in the art can also make several improvements and modifications without departing from the technical principles of the present invention. These improvements and modifications It should also be regarded as the protection scope of the present invention.

Claims (10)

1. A standable wheelchair, comprising a chassis assembly and a seat assembly;

the seat assembly comprises a backrest, a seat, pedals, a seat back angle adjusting mechanism, a seat surface angle adjusting mechanism and a pedal angle adjusting mechanism;

the pedals are hinged with the seat;

the pedal angle adjusting mechanism is used for adjusting an included angle between the pedals and the seat;

the chassis assembly is used for supporting the seat above;

the backrest is connected with the seat;

the chair back angle adjusting mechanism is used for adjusting the included angle between the backrest and the chair;

the seat angle adjusting mechanism is used for adjusting the inclination angle of the seat.

2. The standable wheelchair of claim 1 wherein the seat comprises a connected seat frame and seat cushion; the backrest comprises a back frame and a back cushion which are connected; the pedals are hinged with the chair frame; the chair frame is connected with the chassis assembly.

3. The standable wheelchair of claim 2, wherein the back angle adjustment mechanism comprises an angle adjustment drive mechanism, a drive bar, a drive gear, and a back attachment plate; the angle modulation driving mechanism is connected with the chair frame and is in transmission connection with the transmission rod; the transmission rod is connected with the driving gear; the driving gear is in transmission connection with the transmission gear; the transmission gear is connected with the backrest connecting plate; the backrest connecting plate is connected with the back frame.

4. A standable wheelchair according to claim 3, characterized in that,

the chair back angle adjusting mechanism further comprises a motor mounting plate, a spline shaft, a turntable and a fixing plate;

the angle driving mechanism is an angle modulation motor; the angle modulation motor is connected with the motor mounting plate; the motor mounting plate is fixed on the chair part frame through a connecting shaft;

the backrest connecting plate comprises a backrest connecting part and a transmission connecting part; the backrest connecting part is inserted into the back frame and connected with the back frame;

the driving gears are fixed at two ends of the transmission rod; the driving gear is in transmission connection with the transmission gear;

the spline shaft is fixedly connected with the transmission gear; the fixed plate, the turntable, the transmission connecting part and the transmission gear are sequentially sleeved on the spline shaft; the transmission connecting part is fixedly connected with the spline shaft and rotates around the fixed plate through the turntable; the fixed plate is fixedly connected with the chair frame and is rotationally connected with the transmission rod through the shaft sleeve.

5. The standable wheelchair of claim 4, wherein the back-rest connection plate is of a fold line shape, and the angle between the central axis of the back-rest connection portion and the central axis of the drive connection portion is greater than 90 degrees.

6. The standable wheelchair of claim 2 wherein the seat angle adjustment mechanism comprises a linear drive, a bracket pivot and a drive connection;

the bracket is connected with the chassis assembly;

the bracket rotating shaft is connected with the bracket, and the bracket rotating shaft is rotationally connected with the chair part frame;

the driving device connecting piece is connected with the bracket rotating shaft;

one end of the linear driving device is hinged with the chair frame, and the other end of the linear driving device is hinged with the driving device connecting piece.

7. The standable wheelchair of claim 6, wherein the bracket comprises a horizontally disposed support and a connection with the support at the bottom;

the bearing part is connected with the chassis assembly; the connecting part is obliquely arranged;

the bracket rotating shaft is horizontally arranged and fixedly connected with the upper end of the connecting part;

the linear driving device is perpendicular to the bracket rotating shaft;

the driving device connecting piece is obliquely arranged, the upper end of the driving device connecting piece is fixedly connected with the bracket rotating shaft, and the lower end of the driving device connecting piece is hinged with the linear driving device.

8. The standable wheelchair of claim 6 wherein the seat angle adjustment mechanism further comprises a seat mounting shaft, a rotation locking slot, a rotation handle and a rotation pin;

the bracket is provided with a vertical seat mounting hole;

the seat mounting shaft is vertically arranged, and the lower end of the seat mounting shaft is connected with the chassis assembly and is rotationally connected with the seat mounting hole through a tapered roller bearing;

the rotary locking groove is horizontally arranged and sleeved on the seat mounting shaft and fixed with the seat mounting shaft, and is positioned below the bracket, and three notches with angles of 0 DEG, 90 DEG and 180 DEG are arranged on the periphery of the rotary locking groove;

the rotating pin is matched with the notch;

the rotary handle is connected with the lower end face of the bracket and connected with the rotary pin and is used for controlling unlocking and locking of the rotary pin and the notch.

9. The standable wheelchair of claim 1, further comprising a leg guard assembly and a chest guard assembly;

the chest protector component is a binding band and is connected with the backrest;

the leg guard assembly comprises a mounting block connected with the pedal, a fixing seat fixedly connected with the mounting block, a fixing rod penetrating into the fixing seat and fixed through a locking screw, an adjusting rod connected with the fixing rod through a hinge assembly with damping, an adjusting nut fixedly connected with the adjusting rod, a supporting cross rod perpendicular to the adjusting rod and connected with the adjusting nut through the adjusting screw, two sliding blocks connected with the supporting cross rod in a sliding mode and locked through screws, and soft cushions connected with the two sliding blocks and attached to the legs respectively, wherein the adjusting screw penetrates through the supporting cross rod and is connected with the adjusting nut.

10. The standable wheelchair of claim 1, wherein,

casters are arranged below the pedals of the pedals;

the chassis assembly includes an auxiliary pedal; the auxiliary pedal is positioned between the two driving wheels of the chassis assembly; and a lifting mechanism for supporting and adjusting the height of the seat is connected above the chassis assembly.