Hand-wheel quick-release wheelchair

Abstract

The utility model discloses a hand wheel quick detachable wheelchair, aims at setting transmission structure, and the rear wheel is driven to rotate through hand wheel, and hand wheel is detachable, and it is convenient to ride, its technical scheme: a kind of hand wheel quick detachable wheelchair, including two side frames and the cross arm of connecting two side frames, the bottom of side frame is equipped with front wheel and rear wheel, two side frames are equipped with seat pad, first synchronous wheel is rotatably equipped on side frame, second synchronous wheel is equipped on rear wheel, first synchronous wheel and second synchronous wheel are connected by synchronous belt transmission, first synchronous wheel is lower than seat pad, detachable installation has hand wheel on first synchronous wheel, rotate hand wheel and drive first synchronous wheel rotation, belong to wheelchair technical field.

Description

Technical Field

[0001] This utility model belongs to the field of wheelchair technology, and more specifically, relates to a wheelchair with a quick-release handwheel. Background Technology

[0002] A wheelchair is a device used to help people with mobility impairments move around. It typically consists of a seat, wheels, armrests, and footrests.

[0003] For example, patent 201410005957.5 discloses a wheelchair, including a seat assembly, a transmission device, and a transformation device. The seat assembly includes a seat, armrests on both sides of the seat, and a frame below the seat. A seat plate is provided between the seat and the frame. The transmission device includes a push rod on the outside of the back of the seat, an axle passing through the frame, wheels at both ends of the axle, and handwheels on the outside of the wheels. The transformation device includes a transformation switch on the push rod, a track between the seat and the frame, a pulley on the frame that matches the track, and a positioning pin between the pulley and the track.

[0004] The aforementioned wheelchair moves by rotating its rear wheels. When riding this type of wheelchair, one needs to sit on the seat from the footrest. Because there is a certain distance between the footrest and the seat, it is very inconvenient to sit on, and it is often impossible to sit on the seat from the side. Furthermore, due to the obstruction of the rear wheels, it is impossible to sit on the seat from the side. Summary of the Invention

[0005] The main purpose of this utility model is to provide a wheelchair with a quick-release handwheel, which is designed to set up a transmission structure that drives the rear wheel to rotate through the handwheel, and the handwheel is detachable for convenient use.

[0006] According to a first aspect of the present invention, a handwheel quick-release wheelchair is provided, comprising two side frames and a cross arm connecting the two side frames. The bottom of each side frame is provided with a front wheel and a rear wheel. A seat cushion is mounted on each of the two side frames. A first synchronous wheel is rotatably mounted on each side frame, and a second synchronous wheel is mounted on each rear wheel. The first synchronous wheel and the second synchronous wheel are connected by a synchronous belt drive. The first synchronous wheel is lower than the seat cushion. A handwheel is detachably mounted on the first synchronous wheel. Rotating the handwheel drives the first synchronous wheel to rotate.

[0007] In the aforementioned handwheel quick-release wheelchair, a backrest support tube is provided on the side frame, and a backrest cushion is mounted on the two backrest support tubes;

[0008] The backrest support tube is equipped with an armrest, which can rotate upwards.

[0009] In the aforementioned handwheel quick-release wheelchair, a hollow shaft is provided on the side frame, and the first synchronous wheel is rotatably mounted on the hollow shaft;

[0010] The first synchronous pulley is provided with multiple recesses, and the handwheel is provided with protrusions that are adapted to the recesses, the protrusions being embedded in the recesses;

[0011] The handwheel is provided with a pin that passes through the hollow shaft to prevent the protrusion from disengaging from the recess.

[0012] In the aforementioned quick-release wheelchair with handwheel, the first synchronous wheel has a threaded hole, and a screw is inserted through the handwheel. The screw engages with the threaded hole to fix the handwheel onto the first synchronous wheel.

[0013] In the aforementioned quick-release wheelchair with handwheel, the recess includes a circular blind hole, and the protrusion includes a cylinder, the cylinder engaging with the circular blind hole.

[0014] In the aforementioned handwheel quick-release wheelchair, the recess includes an arc-shaped through hole that bends around the axis of the hollow shaft, and the protrusion includes an arc-shaped block that engages with the arc-shaped through hole.

[0015] In the aforementioned quick-release wheelchair with handwheel, multiple recesses are evenly distributed circumferentially around the hollow axis.

[0016] In the aforementioned quick-release wheelchair with handwheel, a footrest bracket is fixed to the side frame, and a foot pedal is provided on the footrest bracket.

[0017] One of the above-described technical solutions of this utility model has at least one of the following advantages or beneficial effects:

[0018] In this invention, a handwheel is additionally provided. The handwheel is connected to the rear wheel via a transmission structure. Based on the first and second synchronous wheels, turning the handwheel will drive the first synchronous wheel to rotate, which in turn drives the second synchronous wheel to rotate, thereby causing the rear wheel to rotate and enabling the wheelchair to move. At the same time, the first synchronous wheel is set lower than the seat cushion, and the handwheel and the first synchronous wheel are detachable. After removing the handwheel, one can sit on the seat cushion from the side without being affected by the foot pedal, making it more convenient. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0020] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present utility model;

[0021] Figure 2 This is an exploded view of the structure of the first embodiment of this utility model;

[0022] Figure 3 This is a schematic diagram of the side frame structure according to the first embodiment of this utility model;

[0023] Figure 4 This is an exploded view of the handwheel and the first synchronous wheel of the first embodiment of this utility model.

[0024] The figure labels for each figure are as follows:

[0025] 1. Side frame; 11. First synchronous pulley; 111. Recess; 112. Threaded hole; 12. Backrest support tube; 121. Support; 13. Hollow shaft; 2. Cross arm; 3. Front wheel; 4. Rear wheel; 41. Second synchronous pulley; 42. Synchronous belt; 5. Seat cushion; 6. Handwheel; 61. Protrusion; 62. Pin; 63. Screw; 7. Backrest cushion; 8. Armrest; 9. Foot pedal bracket; 10. Foot pedal. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0027] The following disclosure provides many different implementation methods or examples for different solutions to implement this utility model.

[0028] Reference Figures 1 to 4 As shown, a quick-release wheelchair with a handwheel includes two side frames 1 and a cross arm 2 connecting the two side frames 1. The bottom of the side frame 1 is provided with a front wheel 3 and a rear wheel 4. A seat cushion 5 is mounted on the two side frames 1. A first synchronous wheel 11 is rotatably mounted on the side frame 1, and a second synchronous wheel 41 is mounted on the rear wheel 4. The first synchronous wheel 11 and the second synchronous wheel 41 are connected by a synchronous belt drive. The first synchronous wheel 11 is lower than the seat cushion 5. A handwheel 6 is detachably mounted on the first synchronous wheel 11. Rotating the handwheel 6 drives the first synchronous wheel 11 to rotate.

[0029] The handwheel 6 and the rear wheel 4 are connected by a transmission structure. Based on the first synchronous wheel 11 and the second synchronous wheel 41, turning the handwheel 6 will drive the first synchronous wheel 11 to rotate, which in turn drives the second synchronous wheel 41 to rotate, thereby causing the rear wheel 4 to rotate, thus enabling the wheelchair to move. At the same time, the first synchronous wheel 11 is set lower than the seat cushion 5, and the handwheel 6 and the first synchronous wheel 11 are detachable. After removing the handwheel 6, one can sit on the seat cushion 5 from the side without being affected by the foot pedal, which is more convenient. Then, the handwheel 6 can be reattached to the first synchronous wheel 11, and the handwheel 6 can then be used to drive the rear wheel 4 to rotate.

[0030] In this embodiment, a backrest support tube 12 is provided on the side frame 1, and a backrest pad 7 is mounted on the two backrest support tubes 12.

[0031] The backrest support tube 12 is equipped with an armrest 8, which can be rotated upwards. After removing the handwheel 6, the armrest 8 can be rotated upwards to fully open the side of the seat cushion 5 for easy seating.

[0032] Specifically, the backrest support tube 12 is provided with a support 121, and the support 121 has an upward-opening groove. One end of the armrest 8 is hinged to the support 121. When the armrest 8 is lowered, the armrest 8 can be locked in the groove. The support 121 supports the armrest 8, allowing the armrest 8 to maintain its posture. When the handwheel 6 is removed, the armrest 8 can be rotated upward to allow the armrest 8 to leave the groove.

[0033] In this embodiment, the side frame 1 can be welded together from multiple tubes, and the side frame 1 and the backrest support tube 12 can also be fixed together by welding.

[0034] In this embodiment, a hollow shaft 13 is provided on the side frame 1, and the first synchronous pulley 11 is rotatably mounted on the hollow shaft 13;

[0035] The first synchronous pulley 11 is provided with a plurality of recesses 111, and the handwheel 6 is provided with protrusions 61 that are adapted to the recesses 111, and the protrusions 61 are embedded in the recesses 111.

[0036] The handwheel 6 is provided with a pin 62, which passes through the hollow shaft 13 to prevent the protrusion 61 from disengaging from the recess 111.

[0037] The handwheel 6 and the first synchronous wheel 11 are connected by the pin 62. The handwheel 6 and the first synchronous wheel 11 can rotate synchronously by the cooperation of the protrusion 61 and the recess 111. Rotating the handwheel 6 will rotate the first synchronous wheel 11.

[0038] The pin 62 passes through the hollow shaft 13. The pin 62 is equipped with a V-shaped spring buckle. The V-shaped spring buckle prevents the pin 62 from easily disengaging from the hollow shaft 13. Furthermore, the pin 62 can rotate with the handwheel 6. The hollow shaft 13 does not affect the rotation of the pin 62, but only restricts the pin 62 from disengaging.

[0039] In this embodiment, a mounting block is fixed on the side frame 1. The mounting block has a through groove, and the hollow shaft 13 passes through the through groove. The hollow shaft 13 is designed as a stepped shaft, and the bearing can be positioned by relying on the steps. The first synchronous pulley 11 cooperates with the bearing. The two ends of the hollow shaft 13 are threaded with anti-loosening nuts. The hollow shaft 13 is fixed on the mounting block by the anti-loosening nuts, while preventing the first synchronous pulley 11 from disengaging from the hollow shaft 13. Based on the through groove, the position of the hollow shaft 13 can also be adjusted, thereby adjusting the distance between the first synchronous pulley 11 and the second synchronous pulley 41.

[0040] In this embodiment, the first synchronous pulley 11 has a threaded hole 112, and the handwheel 6 is provided with a screw 63. The screw 63 cooperates with the threaded hole 112 to fix the handwheel 6 on the first synchronous pulley 11.

[0041] The handwheel 6 and the first synchronous wheel 11 are further fixed to ensure that the handwheel 6 and the first synchronous wheel 11 rotate synchronously;

[0042] Specifically, the screw 63 can be the screw on a single-arm knob, which is more convenient to turn when the single-arm knob is turned; a hexagonal groove can be opened on the first synchronous wheel 11, and the nut can be embedded in the hexagonal groove. The threaded hole of the nut can serve as the threaded hole 112 that mates with the screw 63.

[0043] In this embodiment, the recessed portion 111 includes a circular blind hole and an arc-shaped through hole, and the protrusion 61 includes a cylinder and an arc-shaped block. The cylinder cooperates with the circular blind hole, the arc-shaped through hole bends around the axis of the hollow shaft 13, and the arc-shaped block cooperates with the arc-shaped through hole, thereby allowing multiple parts of the handwheel 6 to extend into the first synchronous wheel 11, which facilitates the transmission of torque. The design of the arc-shaped through hole can reduce weight, while the circular blind hole is more used for positioning.

[0044] In this embodiment, multiple recesses 111 are evenly distributed around the hollow axis 13, resulting in more uniform force distribution.

[0045] In this embodiment, a footrest bracket 9 is fixed on the side frame 1, and a foot pedal 10 is provided on the footrest bracket 9. The foot pedal 10 can be used by the rider to place their legs. Of course, the footrest bracket 9 can also be rotated for easy folding.

[0046] In this embodiment, the wheelchair is foldable, and the two side frames 1 can be brought together or separated by the cross arms 2, so the backrest cushion 7 and the seat cushion 5 can both be made of flexible material.

[0047] In this embodiment, a handbrake structure is also provided on the side frame 1, which allows the passenger to brake the rear wheel 4.

[0048] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A handwheel quick-release wheelchair, characterized in that, It includes two side frames and a cross arm connecting the two side frames. The bottom of the side frames is provided with a front wheel and a rear wheel. A seat cushion is mounted on the two side frames. A first synchronous pulley is rotatably mounted on the side frame, and a second synchronous pulley is mounted on the rear wheel. The first synchronous pulley and the second synchronous pulley are connected by a synchronous belt drive. The first synchronous pulley is lower than the seat cushion. A handwheel is detachably mounted on the first synchronous pulley. Rotating the handwheel drives the first synchronous pulley to rotate.

2. The quick-release wheelchair with handwheel according to claim 1, characterized in that, The side frame is equipped with backrest support tubes, and backrest cushions are mounted on the two backrest support tubes. The backrest support tube is equipped with an armrest, which can rotate upwards.

3. The handwheel quick-release wheelchair according to claim 1, characterized in that, The side frame is provided with a hollow shaft, and the first synchronous pulley is rotatably mounted on the hollow shaft; The first synchronous pulley is provided with multiple recesses, and the handwheel is provided with protrusions that are adapted to the recesses, the protrusions being embedded in the recesses; The handwheel is provided with a pin that passes through the hollow shaft to prevent the protrusion from disengaging from the recess.

4. The quick-release wheelchair with handwheel according to claim 3, characterized in that, The first synchronous pulley has a threaded hole, and a screw is inserted through the handwheel. The screw engages with the threaded hole to fix the handwheel onto the first synchronous pulley.

5. The quick-release wheelchair with handwheel according to claim 3, characterized in that, The recessed portion includes a circular blind hole, and the protruding portion includes a cylinder, the cylinder cooperating with the circular blind hole.

6. The quick-release wheelchair with handwheel according to claim 3 or 5, characterized in that, The recessed portion includes an arc-shaped through hole that bends around the axis of the hollow shaft, and the protruding portion includes an arc-shaped block that engages with the arc-shaped through hole.

7. The quick-release wheelchair with handwheel according to claim 3, characterized in that, The plurality of said recesses are evenly distributed circumferentially around the hollow axis.

8. The quick-release wheelchair with handwheel according to claim 1, characterized in that, A foot pedal bracket is fixed on the side frame, and a foot pedal is provided on the foot pedal bracket.

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