CN111150575A

CN111150575A - Rotation mechanism of gaz wheelchair seat

Info

Publication number: CN111150575A
Application number: CN202010126038.9A
Authority: CN
Inventors: 罗椅民
Original assignee: Guangdong Yiming Intelligent Medical Technology Co ltd
Current assignee: Guangdong Yiming Intelligent Medical Technology Co ltd
Priority date: 2020-02-27
Filing date: 2020-02-27
Publication date: 2020-05-15

Abstract

The invention discloses a rotating mechanism of a meritorious wheelchair seat, which comprises a servo motor box and a fixing box, wherein a servo motor is installed inside the servo motor box, the fixing box is fixedly arranged at the lower end of the servo motor box, and the fixing box The interior of the seat is provided with a seat rotation spindle, a fixed shaft and a worm gear through the bearing rotation. The upper end of the seat rotation spindle penetrates the servo motor box and is drivingly connected with the servo motor. The outer surface of the seat rotation spindle is sleeved with a one-way The one-way wheel includes a shrapnel, an outer gear ring, an inner ratchet ring and a circular ring; by designing a fixed box, rotating the handwheel controls the worm to mesh with the worm wheel, driving the seat rotation spindle to rotate, thereby realizing the rotation of the seat Control, and the servo motor controls the seat rotation without being restricted by the worm and worm gear mechanism. The operation is simple and convenient, and the steering of the seat can be adjusted and controlled even if the motor is damaged, which is convenient for the wheelchair to overcome life and professional activities in a narrow environment.

Description

Rotation mechanism of gaz wheelchair seat

Technical Field

The invention belongs to the technical field of wheelchairs, and particularly relates to a rotating mechanism of a wheelchair seat.

Background

The wheelchair is a chair provided with wheels and capable of helping to replace walking, and is divided into electric and manual folding wheelchairs, and is an important moving tool for home rehabilitation, turnover transportation, diagnosis and outgoing activities of wounded persons, patients and disabled persons, so that the patients can perform physical exercise and participate in social activities by means of the wheelchair, in order to overcome living activities and occupational activities in a narrow environment, the wheelchair seat is operated to rotate by 90 degrees through touch on a static control interface, a dynamic operation interface handle can move transversely by left and right, in order to overcome the defect that the environment of the left edge and the right edge of the wheelchair is smaller than 200mm, the wheelchair moves backwards in the narrow environment through touch on the static control interface, the dynamic operation interface handle moves forwards, namely, the guide wheels are converted into driving wheels in front, and the user operates in the.

The existing electric wheelchair has the problems that the rotation of a seat at the upper end of the wheelchair is completed through the driving of a motor, but the traditional electric wheelchair can only control the rotation of the seat through the motor, and when the motor fails or the power supply is insufficient, the orientation of the seat at the upper end of the wheelchair is possibly incorrect, so that the wheelchair is not convenient to manually push to move.

Disclosure of Invention

The invention aims to provide a rotation mechanism of a gay wheelchair seat, which aims to solve the problems that the rotation of the upper seat of the wheelchair is completed by motor drive in the conventional electric wheelchair, but the conventional electric wheelchair can only control the seat to rotate by a motor, and when the motor fails or the power supply is insufficient, the upper seat of the wheelchair is possibly not in right direction, so that the wheelchair is inconvenient to manually push to move.

In order to achieve the purpose, the invention provides the following technical scheme: a rotation mechanism of a gay wheelchair seat comprises a servo motor box and a fixing box, wherein a servo motor is installed inside the servo motor box, the fixing box is fixedly arranged at the lower end of the servo motor box, a seat rotation main shaft, a fixing shaft and a worm wheel are arranged inside the fixing box in a rotating mode through a bearing, the upper end of the seat rotation main shaft penetrates through the servo motor box and is in driving connection with the servo motor, a one-way wheel is sleeved on the outer surface of the seat rotation main shaft and comprises a spring plate, an outer gear ring, an inner ratchet ring and a circular ring, the outer gear ring is fixedly sleeved on the outer surface of the inner ratchet ring, the inner ratchet ring is rotatably sleeved on the outer surface of the circular ring, the circular ring is fixedly sleeved on the outer surface of the seat rotation main shaft, a notch is formed in the outer surface of the circular ring, the spring plate is installed in the notch, and the outer surface of, the first gear is meshed with the outer gear ring, and the worm wheel is meshed with the worm.

Preferably, one end of the worm extends out of the outer surface of the fixed box through rotation of the rotating rod, and a hand wheel is fixedly mounted at the end part of the extending end.

Preferably, the lead angle of the worm is less than the equivalent friction angle between the teeth of the teeth.

Preferably, the diameter of the one-way wheel is equal to the diameter of the worm wheel, and the diameter of the first gear is equal to twice the diameter of the one-way wheel.

Preferably, the fixed ring board that is provided with in upper end of servo motor box, the top of ring board is rotated through plane bearing and is installed the roof, roof and seat fixed connection, and the upper surface edge of ring board has seted up the concave edge of ring, the lower surface edge of roof is provided with the ring arch, the concave edge of ring cooperatees with the ring arch.

Preferably, the cavity has been seted up to the inside of ring board, the surface of ring board sets up the smooth chamber that runs through the cavity, it has the pin rod to slide the embedding in the smooth chamber, the fixed stopper that is provided with in embedding end of pin rod, the ring groove has been seted up to the medial surface of roof, ring groove and stopper clearance fit, the pot head that stretches out of pin rod is equipped with reset spring.

Preferably, the outer surface of the circular ring plate is provided with an internal threaded hole, the reset spring is embedded into the internal threaded hole, and the end part of the internal threaded hole is provided with a plug through threaded screwing.

Compared with the prior art, the invention has the beneficial effects that:

(1) through the fixed box of design, it is connected with the worm wheel meshing to rotate the hand wheel control worm, drives the seat and rotates the main shaft and rotate, and then realizes the rotation control to the seat, and does not receive worm and worm wheel mechanism's restriction easy operation convenient when servo motor control seat rotates, also can adjust control seat under the condition that the motor damages and turn to, life activity and occupation activity under the narrow environment are overcome to the wheelchair of being convenient for.

(2) Through designing the worm gear, can realize reverse auto-lock, the operation of being convenient for is used, sets up the great first gear of diameter for adjust the slew velocity of seat, set up ring groove and stopper, prevent that roof and ring board from breaking away from, and the dismouting seat slewing mechanism of being convenient for.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view of the mounting box of the present invention;

FIG. 3 is a schematic view of a one-way wheel structure of the present invention;

FIG. 4 is a cross-sectional view of the top plate and annular ring plate of the present invention;

in the figure: 1. a servo motor case; 2. a fixing box; 3. a top plate; 4. a circular ring plate; 5. a seat rotation spindle; 6. a one-way wheel; 7. a first gear; 8. a fixed shaft; 9. a worm gear; 10. a worm; 11. a spring plate; 12. an outer gear ring; 13. an inner ratchet ring; 14. a circular ring; 15. a circular groove; 16. a pin rod; 17. a return spring; 18. a limiting block; 19. a cavity.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

Referring to fig. 1-4, the present invention provides a technical solution: a rotation mechanism of a wheelchair seat with gaz comprises a servo motor box 1 and a fixed box 2, wherein a servo motor is installed inside the servo motor box 1, the fixed box 2 is fixedly welded at the lower end of the servo motor box 1, a seat rotation spindle 5, a fixed shaft 8 and a worm wheel 9 are rotatably arranged inside the fixed box 2 through a bearing, the upper end of the seat rotation spindle 5 penetrates through the servo motor box 1 and is in driving connection with the servo motor, a one-way wheel 6 is sleeved on the outer surface of the seat rotation spindle 5, the one-way wheel 6 comprises a spring plate 11, an outer gear ring 12, an inner ratchet ring 13 and a circular ring 14, the outer gear ring 12 is fixedly sleeved on the outer surface of the inner ratchet ring 13, the inner ratchet ring 13 is rotatably sleeved on the outer surface of the circular ring 14, the circular ring 14 is fixedly sleeved on the outer surface of the seat rotation spindle 5 through a key groove and a flat key, a notch, the outer fixed cover of surface of fixed axle 8 is equipped with first gear 7 and worm wheel 9, first gear 7 is connected with outer gear ring 12 meshing, worm wheel 9 is connected with worm 10 meshing, the one end of worm 10 is rotated through the bull stick and is stretched out the surface of fixed box 2, and stretch out end fixed mounting has the hand wheel, rotate worm 10 through the hand wheel, be connected through worm 10 and worm wheel 9 meshing and drive fixed axle 8 and fixed cover and establish the synchronous rotation at the first gear 7 of fixed axle 8 surface, first gear 7 is connected with the meshing of one-way wheel 6 and drives seat rotation main shaft 5 and rotate, and then realize the rotation control to the seat.

In the embodiment, the lead angle of the worm 10 is smaller than the equivalent friction angle between the meshing teeth, so the structure has self-locking property, can realize reverse self-locking, namely the seat can be fixed by stopping rotating the hand wheel, the operation is simple, and the use is convenient.

In the embodiment, the diameter of the one-way wheel 6 is equal to that of the worm wheel 9, the diameter of the first gear 7 is equal to that of the two-time one-way wheel 6, and the effect of increasing and adjusting the rotating speed is achieved by arranging the first gear 7 with the larger diameter.

In this embodiment, the fixed ring board 4 that is provided with in upper end of servo motor box 1, the top of ring board 4 is rotated through plane bearing and is installed roof 3, roof 3 and seat fixed connection, and the upper surface edge of ring board 4 has seted up the concave edge of ring, and the lower surface edge of roof 3 is provided with the ring arch, and the concave edge of ring cooperatees with the ring arch, sets up roof 3, ring board 4 and plane bearing, reduces the rotation resistance, the stable rotation of the seat of being convenient for.

In this embodiment, cavity 19 has been seted up to the inside of ring plate 4, the smooth chamber that runs through cavity 19 is seted up to the surface of ring plate 4, it has pin rod 16 to slide the embedding in the smooth chamber, pin rod 16's embedded end welded fastening has stopper 18, ring groove 15 has been seted up to the medial surface of roof 3, ring groove 15 and stopper 18 clearance fit, the pot head that stretches out of pin rod 16 is equipped with reset spring 17, set up ring groove 15 and stopper 18, drive in stopper 18 embedding ring groove 15 and clearance fit through pin rod 16 and reset spring 17's effect, prevent that roof 3 and ring plate 4 from taking place to break away from.

In this embodiment, the internal thread hole has been seted up to the surface of ring plate 4, and reset spring 17 imbeds and sets up including in the screw hole, and the tip in internal thread hole closes soon through the screw thread and is provided with the end cap, sets up the internal thread hole that has the end cap, the reset spring 17's of being convenient for equipment and accomodate.

The working principle and the using process of the invention are as follows: by arranging the fixing box 2, when a servo motor in the servo motor box 1 is damaged, the worm 10 is rotated by the hand wheel, the worm 10 is meshed with the worm wheel 9 to drive the fixing shaft 8 and the first gear 7 fixedly sleeved on the outer surface of the fixing shaft 8 to synchronously rotate, the first gear 7 is meshed with the one-way wheel 6 to drive the seat rotating main shaft 5 to rotate, and further the rotation control of the seat is realized, as known by the ratchet mechanism, the inner ratchet ring 13 can only move in a single direction relative to the ring 14, when the seat rotates reversely, the elastic sheet 11 can be embedded into the ratchet groove of the inner ratchet ring 13 to realize the fixed connection of the inner ratchet ring 13 and the ring 14, therefore, when the seat is controlled to rotate by the servo motor, the servo motor always rotates along the same direction, at the moment, the inner ratchet ring 13 is rotationally connected with the ring 14, when the seat is required to be manually controlled to rotate, the hand wheel is rotated to enable the seat to, at the moment, the inner ratchet ring 13 and the circular ring 14 are fixedly connected through the elastic sheet 11, the operation is simple and convenient, the seat can be adjusted and controlled to steer under the condition that the motor is damaged, and the wheelchair can conveniently overcome life activities and occupational activities in a narrow environment;

the connection slew velocity of worm wheel is slower, through setting up the great first gear 7 of diameter, reach the effect that increases the regulation rotational speed, the rotation of the quick adjustment control seat of being convenient for, set up roof 3, ring board 4 and plane bearing, reduce the rolling resistance, the stable rotation of the seat of being convenient for, set up ring groove 15 and stopper 18, effect through pin rod 16 and reset spring 17 drives stopper 18 embedding ring inslot 15 and clearance fit, prevent roof 3 and ring board 4 and take place to break away from, and the accessible inwards presses down pin rod 16 and removes ring groove 15 and stopper 18's block, the dismouting seat slewing mechanism of being convenient for.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A rotating mechanism of a meritorious wheelchair seat, comprising a servo motor box (1) and a fixing box (2), a servo motor is installed inside the servo motor box (1), and the fixing box (2) is fixedly arranged in the The lower end of the servo motor box (1) is characterized in that: a seat rotation main shaft (5), a fixed shaft (8) and a worm wheel (9) are arranged inside the fixed box (2) through bearings to rotate, and the seat The upper end of the rotating spindle (5) penetrates through the servo motor box (1) and is drivingly connected with the servo motor. The outer surface of the seat rotating spindle (5) is sleeved with a one-way wheel (6). ) comprising a shrapnel (11), an outer gear ring (12), an inner ratchet ring (13) and a circular ring (14), the outer gear ring (12) is fixedly sleeved on the outer surface of the inner ratchet ring (13), so The inner ratchet ring (13) is rotatably sleeved on the outer surface of the annular ring (14), the annular ring (14) is fixedly sleeved on the outer surface of the seat rotation spindle (5), and the outer surface of the annular ring (14) A notch (11) is installed on the surface of the notch, and a first gear (7) and a worm gear (9) are fixedly sleeved on the outer surface of the fixed shaft (8). The first gear (7) ) is meshed with the external gear ring (12), and the worm gear (9) is meshed with the worm (10).

2. The rotating mechanism of a meritorious wheelchair seat according to claim 1, characterized in that: one end of the worm (10) protrudes from the outer surface of the fixed box (2) through the rotation of the rotating rod, and the protruding end The end is fixedly installed with a handwheel.

3 . The rotating mechanism of a meritorious wheelchair seat according to claim 1 , wherein the lead angle of the worm ( 10 ) is smaller than the equivalent friction angle between the meshing teeth. 4 .

The rotating mechanism of a meritorious wheelchair seat according to claim 1, characterized in that: the diameter of the one-way wheel (6) is equal to the diameter of the worm wheel (9), and the diameter of the first gear (7) is equal to that of the worm wheel (9). The diameter is equal to twice the diameter of the one-way wheel (6).

The rotating mechanism of a meritorious wheelchair seat according to claim 1, characterized in that: a circular ring plate (4) is fixedly arranged on the upper end of the servo motor box (1), and the circular ring plate (4) ) is rotatably installed with a top plate (3) through a plane bearing, the top plate (3) is fixedly connected with the seat, and the upper surface edge of the annular plate (4) is provided with an annular concave edge, and the top plate (3) The edge of the lower surface of the device is provided with a circular ring protrusion, and the circular ring concave edge is matched with the circular ring protrusion.

6 . The rotating mechanism of a meritorious wheelchair seat according to claim 5 , characterized in that: a cavity ( 19 ) is opened inside the annular plate ( 4 ), and a cavity ( 19 ) of the annular plate ( 4 ) is provided inside A sliding cavity penetrating the cavity (19) is opened on the outer surface, a pin rod (16) is slidably embedded in the sliding cavity, and a limit block (18) is fixedly arranged at the embedded end of the pin rod (16). The inner side of (3) is provided with a circular groove (15), the circular groove (15) is in clearance fit with the limit block (18), and the extension end of the pin (16) is sleeved with a return spring ( 17).

7. The rotating mechanism of a meritorious wheelchair seat according to claim 6, characterized in that: the outer surface of the annular plate (4) is provided with an internal thread hole, and the return spring (17) is embedded in the A plug is arranged in the inner threaded hole and the end of the inner threaded hole is screwed together.