Wheelchair manual power-assisted drive device and wheelchair

Abstract

The utility model belongs to wheelchair technical field discloses a kind of wheelchair manual power drive device and wheelchair, wheelchair manual power drive device includes cross bar, clamping joint, directional swing piece and grip bar, cross bar opposite both ends are equipped with clamping joint, the position of clamping joint along the length direction of cross bar is adjustable, directional swing piece is located in the middle of cross bar, directional swing piece is configured as driving cross bar directional swing around first direction or second direction, grip bar is located in the end of directional swing piece away from cross bar;Wheelchair includes above-mentioned wheelchair manual power drive device, still includes body, wheel and limiting piece, wheel rotation is arranged in body, hand wheel ring is equipped on wheel, the clamping joint of cross bar opposite both ends is all clamped on hand wheel ring, limiting piece is arranged on body, for the swing range of limiting grip bar.This wheelchair manual power drive device, can be conveniently driven wheelchair forward and backward by user, simple structure, convenient operation is laborsaving.

Description

Technical Field

[0001] This utility model relates to the field of wheelchair technology, and in particular to a manual power assist drive device for a wheelchair and a wheelchair. Background Technology

[0002] A wheelchair is a seat with wheels, primarily used by people with functional disabilities or difficulty walking to facilitate their mobility. There are many types of wheelchairs, categorized by drive method (manual or electric), structure (folding or stationary), and purpose (standard, racing, standing, prone, and recumbent).

[0003] A standard four-wheeled wheelchair with handwheels typically includes a frame, wheels, seat, armrests, backrest, push handle, footrests, and guide wheels. It usually relies on a companion to push it, or the passenger to manually push the handwheels connected to one or two wheels to move the wheelchair forward or backward, making it suitable for most frail or disabled individuals. However, for some elderly or frail users, their limited strength makes it difficult to drive the handwheels themselves. Furthermore, pushing the handwheels tends to cause the upper body to lean backward or forward, potentially requiring some leg effort, which limits its usability. Utility Model Content

[0004] The purpose of this utility model is to provide a manual power-assisted drive device for wheelchairs, which enables users to drive the wheelchair forward and backward by themselves. It has a simple structure and is easy and labor-saving to operate.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A manual power steering device for a wheelchair includes:

[0007] crossbar;

[0008] The crossbar has locking connectors at both opposite ends. The position of the locking connectors along the length of the crossbar is adjustable. The locking connectors are used to engage with the handwheel rim of the wheelchair.

[0009] A directional swing member is disposed in the middle of the crossbar, and the directional swing member is configured to drive the crossbar to swing in a directional manner around a first direction or a second direction;

[0010] A grip is located at the end of the directional swing member away from the crossbar.

[0011] Preferably, the snap-fit ​​connector includes a connecting part and a snap-fit ​​part. The first end of the connecting part is connected to the crossbar, and the snap-fit ​​part is located at the second end of the connecting part. The snap-fit ​​part is bent toward the first end of the connecting part and together with the connecting part forms a first snap-fit ​​groove, which is used to snap-fit ​​with the handwheel ring.

[0012] Preferably, the bent end of the snap-fit ​​part is provided with a second snap-fit ​​groove, and the handwheel ring is connected to the wheel of the wheelchair through a support rib. The second snap-fit ​​groove is used to snap into the support rib.

[0013] Preferably, the connecting portion is connected to the crossbar via a first bolt assembly; wherein...

[0014] The first bolt assembly includes a first bolt and a first nut. The connecting part has a first mounting hole, and the end of the crossbar has an elongated hole. The length direction of the elongated hole is parallel to the length direction of the crossbar. The first bolt passes through the first mounting hole and the elongated hole and is threadedly connected to the first nut.

[0015] Preferably, the directional swing member includes a swing arm and a ratchet, the ratchet being rotatably connected to the swing arm and fixedly connected to the middle of the crossbar. The swing arm is connected to the grip, and the swing arm is equipped with a switching head. A first pawl and a second pawl are respectively provided on opposite sides of the switching head, and the switching head can swing between a first position and a second position.

[0016] When in the first position, the ratchet engages with the first pawl, causing the ratchet to rotate relative to the rocker arm in a first direction.

[0017] When in the second position, the ratchet engages with the second pawl, causing the ratchet to rotate relative to the rocker arm in a second direction.

[0018] The first direction and the second direction rotate in opposite directions.

[0019] Preferably, the crossbar and the ratchet are fixedly connected by a second bolt assembly; wherein...

[0020] The second bolt assembly includes a second bolt and a second nut. The crossbar has a second mounting hole, and the ratchet has a through hole. The second bolt passes through the second mounting hole and the through hole and is threadedly connected to the second nut.

[0021] Preferably, a switching lever is fixedly provided on the switching head.

[0022] Preferably, the grip bar is provided with a gripping part.

[0023] This utility model also provides a wheelchair, which includes the above-mentioned manual power-assisted drive device, making it easy for users to drive the wheelchair forward and backward by themselves. It has a simple structure and is convenient and labor-saving to operate.

[0024] A wheelchair, comprising the manual power steering device described in any one of the preceding claims, further comprising:

[0025] ontology;

[0026] A wheel is rotatably mounted on the body, and a handwheel rim is provided on the wheel. The snap-fit ​​connectors at opposite ends of the crossbar are snapped onto the handwheel rim.

[0027] A limiting member, provided on the main body, is used to limit the swing range of the grip.

[0028] Preferably, the limiting member is a limiting rope, which is disposed on the body and together with the body to form a limiting area, and the grip bar passes through the limiting area.

[0029] Beneficial effects:

[0030] The manual power steering device for wheelchairs provided by this utility model, when used in a wheelchair, has locking connectors at both ends of the crossbar that engage with the handwheel rim, thus connecting the drive device to the wheelchair. When the user sits in the wheelchair, they grip and swing the handles, causing the crossbar to swing in a first or second direction under the action of the directional swinging component. This drives the handwheel rim to rotate clockwise or counterclockwise, thereby propelling the wheelchair forward or backward. Utilizing the lever principle, this device allows the user to turn the handwheel rim more easily and effortlessly, making it easier to drive the wheelchair forward and backward independently. It features a simple structure, convenient and labor-saving operation, and strong practicality.

[0031] The wheelchair provided by this utility model includes the aforementioned manual power-assisted drive device, which makes it easy for users to drive the wheelchair forward and backward by themselves. It has a simple structure and is convenient and labor-saving to operate. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the manual power assist drive device for wheelchairs provided by this utility model;

[0033] Figure 2 This is the front view of the crossbar provided by this utility model;

[0034] Figure 3 This is a top view of the crossbar provided by this utility model;

[0035] Figure 4 This is a side view of the crossbar provided by this utility model;

[0036] Figure 5 This is a front view of the card connector provided by this utility model;

[0037] Figure 6 This is a top view of the card connector provided by this utility model;

[0038] Figure 7 This is a side view of the card connector provided by this utility model;

[0039] Figure 8 This is a schematic diagram showing the switching head of the directional swing component provided by this utility model in the first position;

[0040] Figure 9 This is a schematic diagram showing the switching head of the directional swing component provided by this utility model in the second position;

[0041] Figure 10 This is a structural schematic diagram of the wheelchair provided by this utility model.

[0042] In the picture:

[0043] 1. Crossbar; 11. Elongated hole; 12. Second mounting hole;

[0044] 2. Snap-fit ​​connector; 21. Connecting part; 211. First mounting hole; 22. Snap-fit ​​part; 23. First slot; 24. Second slot;

[0045] 3. Orienting swing component; 31. Swing rod; 311. Switching head; 3111. First pawl; 3112. Second pawl; 3113. First positioning groove; 3114. Second positioning groove; 312. Switching lever; 313. Insertion groove; 32. Ratchet; 321. Through hole; 331. Limiting bead; 332. Spring;

[0046] 4. Grip; 41. Grip section;

[0047] 100. Ontology;

[0048] 200. Wheel; 210. Handwheel rim; 220. Support rib;

[0049] 300. Limiting components. Detailed Implementation

[0050] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0051] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0052] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0053] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0054] This embodiment provides a wheelchair. (Refer to...) Figures 1 to 9 As shown, the wheelchair includes a body 100 and wheels 200. The wheels 200 are rotatably mounted on the body 100, and each wheel 200 has a handwheel rim 210. The wheelchair also includes a manual power-assisted drive device, which includes a crossbar 1, locking connectors 2, a directional swing member 3, and a grip bar 4. Locking connectors 2 are located at opposite ends of the crossbar 1, and their positions along the length of the crossbar 1 are adjustable. The locking connectors 2 are used to engage with the handwheel rim 210 of the wheelchair. The locking connectors 2 at opposite ends of the crossbar 1 are all engaged with the handwheel rim 210. The directional swing member 3 is located in the middle of the crossbar 1 and is configured to drive the crossbar 1 to swing in a first or second direction. The grip bar 4 is located at the end of the directional swing member 3 away from the crossbar 1.

[0055] In this embodiment, the wheelchair body 100 includes components such as a frame, seat, armrests, backrest, push handle, foot pedals, and guide wheels. The specific structure of the wheelchair body 100 is existing technology.

[0056] In this embodiment, when the manual power steering device is used on a wheelchair, the locking connectors 2 at both ends of the crossbar 1 are engaged with the handwheel rim 210, thus connecting the drive device to the wheelchair. When the user sits in the wheelchair, they grip the handle 4 and swing it. Under the action of the directional swing member 3, the crossbar 1 can swing in a first or second direction, thereby driving the handwheel rim 210 to rotate clockwise or counterclockwise, and thus propelling the wheelchair forward or backward. Utilizing the lever principle, this allows the user to rotate the handwheel rim 210 with less effort, making it easier to drive the wheelchair forward and backward independently. The structure is simple, the operation is convenient and effortless, and it is highly practical.

[0057] In addition, the wheelchair as a whole includes the aforementioned manual power-assisted drive device, thus having the beneficial effects of the aforementioned manual power-assisted drive device, making it easy for users to drive the wheelchair forward and backward by themselves. It has a simple structure and is convenient and labor-saving to operate.

[0058] In this embodiment, the snap-fit ​​connector 2 includes a connecting portion 21 and a snap-fit ​​portion 22. The first end of the connecting portion 21 is connected to the crossbar 1, and the snap-fit ​​portion 22 is located at the second end of the connecting portion 21. The snap-fit ​​portion 22 is bent toward the first end of the connecting portion 21 and together with the connecting portion 21 forms a first snap-fit ​​groove 23, which is used to snap-fit ​​with the handwheel ring 210. Specifically, the two first snap-fit ​​grooves 23 of the two snap-fit ​​portions 22 are located at both ends of the crossbar 1, and their openings are opposite to each other. When installing the crossbar 1, the positions of the two snap-fit ​​connectors 2 relative to the length direction of the crossbar 1 are adjusted to increase the distance between the two first snap-fit ​​grooves 23, thereby ensuring that the distance between the two first snap-fit ​​grooves 23 is greater than the diameter of the handwheel ring 210, so that the handwheel ring 210 can be located inside the two first snap-fit ​​grooves 23. When the crossbar 1 is in place, the two first slots 23 are located on the outer side of the handwheel ring 210. Then, the positions of the two locking heads 2 relative to the length direction of the crossbar 1 are adjusted again to reduce the distance between the two first slots 23. Finally, the handwheel ring 210 is inserted into the two first slots 23, and the locking heads 2 are fixed relative to the crossbar 1, thus completing the installation process.

[0059] Specifically, a second slot 24 is provided at the bent end of the snap-fit ​​part 22. The handwheel ring 210 is connected to the wheelchair wheel 200 via a support rib 220, and the second slot 24 is used to snap into the support rib 220. Specifically, during the snap-fit ​​process between the first slot 23 and the handwheel ring 210, the support rib 220 gradually approaches the second slot 24 and eventually snaps into the second slot 24, further achieving reliable positioning between the snap-fit ​​part 22 and the handwheel ring 210, and improving the reliability and stability of the snap-fit ​​part 2 installation.

[0060] In this embodiment, the connecting part 21 and the crossbar 1 are connected by a first bolt assembly (not shown). The first bolt assembly includes a first bolt and a first nut. The connecting part 21 has a first mounting hole 211, and the end of the crossbar 1 has an elongated hole 11, the length of which is parallel to the length of the crossbar 1. The first bolt passes through the first mounting hole 211 and the elongated hole 11 and is threadedly connected to the first nut. Specifically, after the connecting part 21 and the crossbar 1 are assembled, when the position of the snap-fit ​​connector 2 needs to be adjusted, the first nut is loosened, and the position of the first bolt relative to the elongated hole 11 is adjusted. After the snap-fit ​​connector 2 is adjusted, the first nut is tightened again, so that the first bolt and the first nut press the connecting part 21 and the crossbar 1 together, thereby fixing the snap-fit ​​connector 2 to the crossbar 1.

[0061] In some alternative embodiments, a telescopic component (not shown) is provided between the snap-fit ​​connector 2 and the crossbar 1. The telescopic component can be an electric telescopic rod or a telescopic cylinder, etc. Taking an electric telescopic rod as an example, the electric telescopic rod is connected between the snap-fit ​​connector 2 and the crossbar 1. The extension and retraction of the electric telescopic rod can drive the snap-fit ​​connector 2 to move along the length direction of the crossbar 1, thereby realizing the automatic adjustment of the position of the snap-fit ​​connector 2.

[0062] In this embodiment, the directional swing member 3 includes a swing arm 31 and a ratchet 32. The ratchet 32 ​​is rotatably connected to the swing arm 31 and fixedly connected to the middle of the crossbar 1. The swing arm 31 is connected to the grip bar 4. The swing arm 31 is equipped with a switching head 311. The two opposite sides of the switching head 311 are respectively provided with a first pawl 3111 and a second pawl 3112. The switching head 311 can swing between the first position and the second position. When in the first position, the ratchet 32 ​​engages with the first pawl 3111, causing the ratchet 32 ​​to rotate relative to the swing arm 31 in a first direction. When in the second position, the ratchet 32 ​​engages with the second pawl 3112, causing the ratchet 32 ​​to rotate relative to the swing arm 31 in a second direction. The first direction and the second direction are opposite in rotation. Specifically, the first pawl 3111 is configured to lock the ratchet 32 ​​when it rotates in the first direction, and allow the ratchet 32 ​​to rotate when it rotates in the second direction. The second pawl 3112 is configured to lock the ratchet 32 ​​when it rotates in the second direction, and to allow the ratchet 32 ​​to rotate when it rotates in the first direction. Specifically, when the switching head 311 is in the first position, the ratchet 32 ​​engages with the first pawl 3111. The swing arm 31 swings in the first direction, which locks the ratchet 32 ​​with the first pawl 3111, keeping the swing arm 31 and the crossbar 1 in a relatively fixed state. The swing arm 31 swings in the first direction, thereby driving the handwheel ring 210 to rotate in the first direction. At this time, the swing arm 31 cannot drive the ratchet 32 ​​to rotate when it rotates in the second direction. When the switching head 311 is in the second position, the ratchet 32 ​​engages with the second pawl 3112. At this time, the swing arm 31 swings around the second direction, which will cause the ratchet 32 ​​and the second pawl 3112 to lock together, so that the swing arm 31 and the crossbar 1 remain in a relatively fixed state. The swing arm 31 swings around the second direction, thereby driving the handwheel ring 210 to rotate around the second direction. However, the swing arm 31 cannot drive the ratchet 32 ​​to rotate when it rotates around the first direction.

[0063] The handwheel 210 can rotate in the first direction and the second direction, which correspond to the forward and backward directions of the wheelchair, thereby realizing the drive direction control of the wheelchair's forward and backward movement.

[0064] Furthermore, the switching head 311 is provided with a first positioning groove 3113 and a second positioning groove 3114. The first positioning groove 3113 corresponds to the switching head 311 being in the first position, and the second positioning groove 3114 corresponds to the switching head 311 being in the second position. The rocker arm 31 has an insert groove 313, and a limiting bead 331 is provided in the insert groove 313. A spring 332 is provided between the limiting bead 331 and the insert groove 313. Specifically, when the switching head 311 is in the first position, the first positioning groove 3113 is in the position corresponding to the insert groove 313. At this time, the limiting bead 331 is locked in the first positioning groove 3113 under the pushing action of the spring 332, thus fixing the switching head 311 in the first position. When the switching head 311 is in the second position, the second positioning groove 3114 is in the position corresponding to the insert groove 313. At this time, the limiting bead 331 is locked in the second positioning groove 3114 under the pushing action of the spring 332, thus fixing the switching head 311 in the second position.

[0065] When the switching head 311 needs to be swung, for example, when the switching head 311 swings from the first position to the second position, the switching head 311 is manually driven to swing, which overcomes the elastic force of the spring 332 and causes the spring 332 to deform. This allows the switching head 311 to push the limiting bead 331 out of the first positioning groove 3113 and move into the groove 313 until the switching head 311 swings to the position corresponding to the groove 313 and the second positioning groove 3114. At this point, the spring 332 pushes the limiting bead 331 and locks it into the second positioning groove 3114.

[0066] Specifically, the switching head 311 is rotatably connected to the lever 31 via a swing shaft (not shown).

[0067] For example, the structural features of the aforementioned directional swing member 3 can be directly implemented using a two-way ratchet 32 ​​wrench.

[0068] In this embodiment, the crossbar 1 and the ratchet 32 ​​are fixedly connected by a second bolt assembly (not shown). The second bolt assembly includes a second bolt and a second nut. The crossbar 1 has a second mounting hole 12, and the ratchet 32 ​​has a through hole 321. The second bolt passes through the second mounting hole 12 and the through hole 321 and is threadedly connected to the second nut. The second bolt assembly has a simple structure and is easy to assemble and disassemble.

[0069] In this embodiment, a switching lever 312 is fixedly mounted on the switching head 311. Specifically, the lever 31 has an inner cavity, a ratchet 32 ​​passes through the inner cavity and is rotatably connected to the inner cavity, the switching head 311 is located inside the inner cavity, and the switching lever 312 passes through the inner cavity and extends out of the lever 31. The switching lever 312 facilitates the operator to swing and control the switching head 311.

[0070] In this embodiment, the grip bar 4 is provided with a gripping part 41. Specifically, the gripping part 41 is made of rubber and is also provided with friction texture to facilitate reliable gripping by the user.

[0071] In this embodiment, the wheelchair also includes a limiting member 300. The limiting member 300 is disposed on the main body 100 and is used to limit the swing range of the grip bar 4. The setting of the limiting member 300 effectively limits the swing range of the grip bar 4, preventing the swing angle of the grip bar 4 from being too large and exceeding the user's hand gripping range, and further ensuring practicality.

[0072] Specifically, the limiting member 300 is a limiting rope, which is located on the body 100 and together with the body 100 forms a limiting area. The grip bar 4 passes through the limiting area. Specifically, the limiting rope is a non-elastic rope. When the grip bar 4 swings to its limit position, it contacts the limiting rope. The limiting rope prevents the grip bar 4 from swinging further, thus effectively limiting the swing range of the grip bar 4.

[0073] In some alternative embodiments, the limiting member 300 is configured as a limiting block (not shown) fixed to the wheelchair body 100. A limiting block is provided on the side corresponding to the grip bar 4 in the width direction of the wheelchair. There are two limiting blocks, and the grip bar 4 is located between the two limiting blocks. When the grip bar 4 swings to its limit position, the grip bar 4 comes into direct contact with the limiting block. Under the stop of the limiting block, the grip bar 4 is prevented from swinging further, thereby effectively limiting the swing range of the grip bar 4.

[0074] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A manual power assist drive device for a wheelchair, characterized in that, include: Horizontal bar (1); The snap-fit ​​connector (2) is provided at both ends of the crossbar (1). The position of the snap-fit ​​connector (2) along the length of the crossbar (1) is adjustable. The snap-fit ​​connector (2) is used to snap into the handwheel ring (210) of the wheelchair. A directional swing member (3) is provided in the middle of the crossbar (1), and the directional swing member (3) is configured to drive the crossbar (1) to swing in a directional manner around a first direction or a second direction; The grip (4) is located at the end of the directional swing member (3) away from the crossbar (1).

2. The manual power steering device for wheelchairs according to claim 1, characterized in that, The snap-fit ​​connector (2) includes a connecting part (21) and a snap-fit ​​part (22). The first end of the connecting part (21) is connected to the crossbar (1). The snap-fit ​​part (22) is located at the second end of the connecting part (21). The snap-fit ​​part (22) is bent toward the first end of the connecting part (21) and together with the connecting part (21) forms a first slot (23). The first slot (23) is used to snap-fit ​​with the handwheel ring (210).

3. The manual power steering device for wheelchairs according to claim 2, characterized in that, The bent end of the snap-fit ​​part (22) is provided with a second snap-fit ​​groove (24). The handwheel ring (210) is connected to the wheel of the wheelchair (200) through the support rib (220). The second snap-fit ​​groove (24) is used to snap with the support rib (220).

4. The manual power steering device for wheelchairs according to claim 2, characterized in that, The connecting part (21) and the crossbar (1) are connected by a first bolt assembly; wherein, The first bolt assembly includes a first bolt and a first nut. The connecting part (21) has a first mounting hole (211). The end of the crossbar (1) has an elongated hole (11). The length direction of the elongated hole (11) is parallel to the length direction of the crossbar (1). The first bolt passes through the first mounting hole (211) and the elongated hole (11) and is threadedly connected to the first nut.

5. The manual power steering device for wheelchairs according to claim 1, characterized in that, The directional swinging component (3) includes a swing arm (31) and a ratchet (32). The ratchet (32) is rotatably connected to the swing arm (31), and the ratchet (32) is fixedly connected to the middle of the crossbar (1). The swing arm (31) is connected to the grip (4). The swing arm (31) is equipped with a switching head (311). The switching head (311) has a first pawl (3111) and a second pawl (3112) on opposite sides. The switching head (311) can swing between the first and second positions. When in the first position, the ratchet (32) engages with the first pawl (3111), causing the ratchet (32) to rotate relative to the rocker arm (31) in a first direction. When in the second position, the ratchet (32) engages with the second pawl (3112), causing the ratchet (32) to rotate relative to the rocker arm (31) in a second direction. The first direction and the second direction rotate in opposite directions.

6. The manual power steering device for wheelchairs according to claim 5, characterized in that, The crossbar (1) and the ratchet (32) are fixedly connected by a second bolt assembly; wherein, The second bolt assembly includes a second bolt and a second nut. The crossbar (1) has a second mounting hole (12), and the ratchet (32) has a through hole (321). The second bolt passes through the second mounting hole (12) and the through hole (321) and is threadedly connected to the second nut.

7. The manual power steering device for wheelchairs according to claim 5, characterized in that, A switching lever (312) is fixedly installed on the switching head (311).

8. The manual power steering device for wheelchairs according to claim 1, characterized in that, The grip (4) is provided with a gripping part (41).

9. A wheelchair, characterized in that, Including the manual power steering device for wheelchairs as described in any one of claims 1-8, further comprising: Ontology(100); A wheel (200) is rotatably mounted on the body (100). A handwheel ring (210) is provided on the wheel (200). The snap-fit ​​connectors (2) at opposite ends of the crossbar (1) are snapped onto the handwheel ring (210). A limiting member (300) is provided on the body (100) to limit the swing range of the grip (4).

10. The wheelchair according to claim 9, characterized in that, The limiting member (300) is configured as a limiting rope, which is located on the body (100) and together with the body (100) forms a limiting area, and the grip (4) passes through the limiting area.

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