Multi-wheel independent damping wheelchair

Abstract

The invention belongs to the technical field of wheelchairs, and particularly relates to a multi-wheel independent damping wheelchair, each wheel is provided with an independent damping system, damping can be independently adjusted, and the driving stability is improved, the wheelchair comprises a seat frame, a foot frame and a backrest frame, front and rear wheels are arranged at the two ends of the seat frame respectively, first damping parts are arranged between the front wheels and the seat frame, and second damping parts are arranged between the rear wheels and the seat frame; the two wheels both have independent working capacity and can respectively drive the corresponding wheels to perform damping operation, the design effectively absorbs ground impact force, provides stable and comfortable riding experience, enhances the stability and durability of the wheelchair and adapts to different ground conditions, and the independent damping system can be individually adjusted according to the weight and habits of a user. And the riding comfort is further improved.

Description

Technical Field

[0001] The invention belongs to the technical field of wheelchairs, and in particular relates to a multi-wheel independent shock-absorbing wheelchair. Background Art

[0002] As a special medical device, the function of the walking wheelchair is set to serve specific groups of people or the elderly. Especially for people with limited mobility, it is not only a means of transportation, but more importantly, it can be used to travel and participate in social activities. In the current market, in the traditional wheelchair design, the front wheels on both sides have linked shock absorption, and the rear wheels on both sides have linked shock absorption, and are not equipped with an independent shock absorption system. Therefore, when the wheelchair encounters rugged roads or poor road conditions, the wheelchair will inevitably experience severe bumps due to the lack of sufficient cushioning and shock absorption capabilities. This bump not only greatly reduces the riding comfort, but may also cause the wheelchair to lose balance, and cause dangerous situations such as tilting and overturning. Such safety hazards seriously affect their daily travel safety and reduce their quality of life. Summary of the invention

[0003] The purpose of the present invention is to provide a multi-wheeled independent shock-absorbing wheelchair with a simple structure and each wheel is equipped with an independent shock-absorbing system, so that each wheel can independently adjust the shock absorption when facing different road conditions, thereby improving the driving stability.

[0004] The object of the present invention is achieved in that:

[0005] A multi-wheeled independent shock-absorbing wheelchair comprises a seat frame, a foot frame and a backrest frame respectively arranged at the front and rear ends of the seat frame, a front wheel and a rear wheel are arranged in pairs at the lower end of the seat frame, the front wheel is located on the side close to the foot frame, and the rear wheel is located on the side close to the backrest frame, a first shock-absorbing component is arranged between the front wheel and the seat frame, and the position of the first shock-absorbing component corresponds to the position of the front wheel one-to-one, a second shock-absorbing component is arranged between the rear wheel and the seat frame, and the position of the second shock-absorbing component corresponds to the position of the rear wheel one-to-one, and the first shock-absorbing component and the second shock-absorbing component can independently drive the corresponding front wheel or rear wheel to perform shock absorption.

[0006] Furthermore, the seat frame is provided with a pair of connecting frames, which are located on both sides of the seat frame, the connecting frames are provided with mounting pieces, the mounting pieces are provided with mounting holes, the front wheels are provided with front wheel frames, the front wheel frames are provided with connecting pieces, the upper ends of the connecting pieces are passed through the mounting holes and can move up and down relative to the mounting holes, the front wheel frames are connected to the connecting frames via the connecting pieces, the first shock absorber is sleeved on the connecting piece, the upper end of the first shock absorber abuts against the mounting piece, and the lower end abuts against the front wheel frame, when the front wheel moves upward, the front wheel frame moves upward accordingly to squeeze the first shock absorber to contract, and when the first shock absorber is reset, it drives the front wheel frame to move downward.

[0007] Further, a rotating part is provided at the rear end of the seat frame. A rear wheel frame is provided on the rear wheel. An upper guide rod and a lower guide rod are provided at the upper end of the rear wheel frame. A receiving groove is formed in the upper guide rod. The inner diameter of the receiving groove is larger than the diameter of the lower guide rod. The upper end of the lower guide rod is inserted into the receiving groove. The upper end of the upper guide rod is connected to the seat frame. The second shock absorber is sleeved on the upper guide rod and the lower guide rod. When the rear wheel moves upward, the rear wheel frame moves upward accordingly and compresses the second shock absorber to contract. When the second shock absorber resets, it drives the rear wheel frame to move downward.

[0008] Further, a pair of fixing parts are provided at the rear end of the seat frame. A rotating groove is formed in the fixing part. Rotating holes are formed on both sides of the rotating groove. A rotating shaft is provided at the upper end of the upper guide rod. The two sides of the rotating shaft are respectively connected to the rotating holes on both sides of the rotating groove and can rotate relative to the fixing part, so that the rear wheel frame can rotate relative to the seat frame.

[0009] Further, a rotating shaft is provided on the connecting frame. A rotating part is provided at the front end of the rear wheel frame. Connecting holes are formed on both sides of the rotating part. The rotating shaft is inserted into the connecting holes. The rotating part is connected to the connecting frame through the connecting holes and can rotate relative to the connecting frame around the rotating shaft.

[0010] Further, an upper abutting part is provided at the upper end of the upper guide rod, and a lower abutting part is provided at the lower end of the lower guide rod. The upper end of the second shock absorber is connected to the upper abutting part, and the lower end is connected to the lower abutting part. When the lower guide rod moves upward relative to the upper guide rod, the lower abutting part moves upward and compresses the second shock absorber to contract.

[0011] Further, a pair of pushing parts are provided on the backrest frame, and the pushing parts are located in the upper middle part of the backrest frame.

[0012] Further, the footrest includes a pair of footrest parts and support rods. One end of the support rod is connected to the seat frame, and the other end is connected to the footrest part.

[0013] Further, an armrest frame is further provided on the seat frame, and the armrest frame is located on both sides of the seat frame.

[0014] The prominent and beneficial technical effects of the present invention compared with the prior art are:

[0015] The object of the present invention is to provide a multi-wheel independent shock-absorbing wheelchair with a simple structure, in which each wheel is equipped with an independent shock-absorbing system, enabling each wheel to independently adjust shock absorption when facing different road conditions, thereby improving driving stability. The wheelchair includes a seat frame, a footrest frame and a backrest frame respectively provided at the front and rear ends of the seat frame. At the lower end of the seat frame, a pair of front wheels and rear wheels are provided. The front wheels are located on the side close to the footrest frame, and the rear wheels are located on the side close to the backrest frame. To improve the riding comfort, a first shock-absorbing member is provided between the front wheels and the seat frame, and the position of the first shock-absorbing member corresponds to the position of the front wheels one by one to ensure the shock-absorbing effect of the front wheels. Similarly, a second shock-absorbing member is provided between the rear wheels and the seat frame, and the position of the second shock-absorbing member corresponds to the position of the rear wheels one by one to ensure the shock-absorbing effect of the rear wheels. The first shock-absorbing member and the second shock-absorbing member each have independent working capabilities, and they can respectively drive the corresponding front wheels or rear wheels to perform shock-absorbing operations. Such a design enables the entire seat device to effectively absorb various impact forces from the ground during use, thereby providing a more stable and comfortable riding experience for the user. This independently working shock-absorbing system not only significantly improves the comfort of the seat, but also further enhances the stability and durability of the wheelchair, ensuring that the wheelchair is more reliable during long-term use. Through this design, the wheelchair can better adapt to various different ground conditions, and can provide a stable riding experience whether on a flat road surface or a rough ground surface. In addition, the independent shock-absorbing system can also be adjusted individually according to the user's weight and usage habits, further improving the riding comfort and bringing a more excellent riding experience for the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a perspective view of the present invention.

[0017] Figure 2 is a schematic diagram of the connection structure of the seat frame, footrest frame and backrest frame of the present invention.

[0018] Figure 3 is Figure 2 an enlarged view of part A in

[0019] Figure 4 is a schematic diagram of the structure of the present invention with the seat frame, footrest frame and backrest frame removed.

[0020] Figure 5 is a schematic diagram of the connection structure of the front wheels, front wheel frame, rear wheels and rear wheel frame of the present invention.

[0021] Figure 6 is a schematic diagram of the front wheel frame of the present invention.

[0022] Figure 7 is a schematic diagram of the structure of the rear wheels, second shock-absorbing member and rear wheel frame of the present invention.

[0023] Figure 8It is a schematic structural diagram of the rear wheel and rear wheel frame of the present invention.

[0024] Figure 9 It is a schematic structural diagram of the rear wheel frame of the present invention.

[0025] The meanings represented by the reference numerals in the figure:

[0026] 1 - seat frame; 2 - footrest; 3 - backrest frame; 4 - front wheel; 5 - rear wheel; 6 - first shock absorber; 7 - second shock absorber; 8 - connecting frame; 9 - mounting member; 10 - mounting hole; 11 - front wheel frame; 12 - connecting member; 13 - rotating part; 14 - rear wheel frame; 15 - upper guide rod; 16 - lower guide rod; 18 - fixing part; 20 - rotating hole; 21 - rotating shaft; 22 - rotating axis; 23 - connecting hole; 24 - upper abutting part; 25 - lower abutting part; 26 - pushing part; 27 - footrest part; 28 - support rod; 29 - armrest frame. Detailed implementation manners

[0027] The present invention will be further described below in conjunction with specific embodiments:

[0028] A multi-wheel independent shock-absorbing wheelchair includes a seat frame 1, a footrest 2 and a backrest frame 3 respectively arranged at the front and rear ends of the seat frame 1. The lower end of the seat frame 1 is provided with a pair of front wheels 4 and rear wheels 5. The front wheels 4 are located on the side close to the footrest 2, and the rear wheels 5 are located on the side close to the backrest frame 3. A first shock absorber 6 is provided between the front wheels 4 and the seat frame 1, and the position of the first shock absorber 6 corresponds to the position of the front wheels 4 one by one. A second shock absorber 7 is provided between the rear wheels 5 and the seat frame 1, and the position of the second shock absorber 7 corresponds to the position of the rear wheels 5 one by one. The first shock absorber 6 and the second shock absorber 7 can separately drive the corresponding front wheels 4 or rear wheels 5 for shock absorption.

[0029] The object of the present invention is to provide a multi-wheel independent shock-absorbing wheelchair with a simple structure, in which each wheel is equipped with an independent shock-absorbing system, enabling each wheel to independently perform shock-absorbing adjustment when facing different road conditions, thereby improving driving stability. The wheelchair includes a seat frame 1, a footrest frame 2 and a backrest frame 3 respectively provided at the front and rear ends of the seat frame 1. At the lower end of the seat frame 1, front wheels 4 and rear wheels 5 are provided in pairs. Among them, the front wheels 4 are located on the side close to the footrest frame 2, and the rear wheels 5 are located on the side close to the backrest frame 3. To improve the riding comfort, a first shock-absorbing member 6 is provided between the front wheels 4 and the seat frame 1. The position of the first shock-absorbing member 6 corresponds to the position of the front wheels 4 one by one to ensure the shock-absorbing effect of the front wheels 4. Similarly, a second shock-absorbing member 7 is provided between the rear wheels 5 and the seat frame 1. The position of the second shock-absorbing member 7 corresponds to the position of the rear wheels 5 one by one to ensure the shock-absorbing effect of the rear wheels 5. The first shock-absorbing member 6 and the second shock-absorbing member 7 each have independent working capabilities, and they can respectively drive the corresponding front wheels 4 or rear wheels 5 to perform shock-absorbing operations. Such a design enables the entire seat device to effectively absorb various impact forces from the ground during use, thereby providing a more stable and comfortable riding experience for the user. This independently working shock-absorbing system not only significantly improves the comfort of the seat, but also further enhances the stability and durability of the wheelchair, ensuring that the wheelchair is more reliable during long-term use. Through this design, the wheelchair can better adapt to various different ground conditions, whether it is a flat road surface or a rough ground surface, and can provide a stable riding experience. In addition, the independent shock-absorbing system can also be adjusted individually according to the user's weight and usage habits, further improving the riding comfort and bringing a better riding experience for the user.

[0030] Preferably, connecting frames 8 are provided in pairs on the seat frame 1. The connecting frames 8 are located on both sides of the seat frame 1. An installation member 9 is provided on the connecting frame 8. An installation hole 10 is formed in the installation member 9. A front wheel frame 11 is provided on the front wheel 4. A connecting member 12 is provided on the front wheel frame 11. The upper end of the connecting member 12 passes through the installation hole 10 and can move up and down relative to the installation hole 10. The front wheel frame 11 is connected to the connecting frame 8 through the connecting member 12. The first shock absorber 6 is sleeved on the connecting member 12. The upper end of the first shock absorber 6 abuts against the installation member 9, and the lower end abuts against the front wheel frame 11. When the front wheel 4 moves upward, the front wheel frame 11 moves upward accordingly and squeezes the first shock absorber 6 to contract. When the first shock absorber 6 resets, it drives the front wheel frame 11 to move downward. During driving, when the vehicle encounters a bumpy or uneven road surface, the front wheel 4 will move upward due to the unevenness of the road surface. At this time, the front wheel frame 11 will also move upward accordingly and apply pressure to the first shock absorber 6, causing it to contract. This contraction action can effectively absorb the impact force of the road surface and reduce the vibration transmitted to the vehicle body and the driver, thus significantly improving the driving comfort. After the bump, the first shock absorber 6 will gradually reset and return to its original length. During this reset process, it will drive the front wheel frame 11 to move downward, making the front wheel 4 return to its initial position again. This series of actions ensures the stability and controllability of the front wheel 4 during driving. Through this mechanism, the front wheel 4 can better maintain contact with the road surface, ensuring the driving safety and handling accuracy of the vehicle under various complex road conditions. Therefore, this design not only improves the driving comfort but also ensures the stability and controllability of the front wheel 4, making the driving experience smoother and safer.

[0031] Preferably, a rotating part 13 is provided at the rear end of the seat frame 1, a rear wheel frame 14 is provided on the rear wheel 5, an upper guide rod 15 and a lower guide rod 16 are provided at the upper end of the rear wheel frame 14, a receiving groove is formed in the upper guide rod 15, the inner diameter of the receiving groove is larger than the diameter of the lower guide rod 16, the upper end of the lower guide rod 16 is inserted into the receiving groove, the upper end of the upper guide rod 15 is connected to the seat frame 1, the second shock absorber 7 is sleeved on the upper guide rod 15 and the lower guide rod 16, when the rear wheel 5 moves upward, the rear wheel frame 14 moves upward accordingly and squeezes the second shock absorber 7 to contract, when the second shock absorber 7 resets, it drives the rear wheel frame 14 to move downward. When the rear wheel 5 moves upward, the rear wheel frame 14 moves upward accordingly and squeezes the second shock absorber 7, causing it to contract. When the second shock absorber 7 resets, it drives the rear wheel frame 14 to move downward, thereby achieving the shock absorption effect and ensuring the smoothness and comfort during driving. It not only improves the flexibility and shock absorption performance of the seat frame 1, but also ensures the stability and guiding function of the rear wheel frame 14. It makes the driving process more stable and comfortable, and also enhances the overall driving experience. In addition, this design also has good durability and reliability, can adapt to various driving environments and conditions, and provides a safer and more pleasant driving feeling for users.

[0032] Preferably, a pair of fixing parts 18 are provided at the rear end of the seat frame 1, a rotating groove is formed in the fixing part 18, rotating holes 20 are formed on both sides of the rotating groove, a rotating shaft 21 is provided at the upper end of the upper guide rod 15, and both sides of the rotating shaft 21 are respectively connected to the rotating holes 20 on both sides of the rotating groove and can rotate relative to the fixing part 18, so that the rear wheel frame 14 can rotate relative to the seat frame 1, enabling the rotating shaft 21 to freely rotate relative to the rotating holes 20, thereby realizing the relative rotation between the upper guide rod 15 and the fixing part 18, and enabling the rear wheel frame 14 to flexibly rotate relative to the seat frame 1, thus greatly improving the adaptability and flexibility of the overall structure. This design not only makes the bicycle more stable during driving, but also provides a better control experience for the rider.

[0033] Preferably, a rotating shaft 22 is provided on the connecting frame 8, a rotating part 13 is provided at the front end of the rear wheel frame 14, connecting holes 23 are formed on both sides of the rotating part 13, the rotating shaft 22 is inserted into the connecting holes 23, the rotating part 13 is connected to the connecting frame 8 through the connecting holes 23 and can rotate relative to the connecting frame 8 around the rotating shaft 22, and the rotating part 13 can freely rotate on the axis of the rotating shaft 22, thereby realizing the relative rotation function between the rotating part 13 and the connecting frame 8, not only ensuring the connection stability, but also greatly improving the flexibility of the overall structure and the convenience of operation.

[0034] Preferably, an upper abutting portion 24 is provided at the upper end of the upper guide rod 15, and a lower abutting portion 25 is provided at the lower end of the lower guide rod 16. The upper end of the second shock absorber 7 is connected to the upper abutting portion 24, and the lower end is connected to the lower abutting portion 25. When the lower guide rod 16 moves upward relative to the upper guide rod 15, the lower abutting portion 25 moves upward to squeeze the elastic member to contract, ensuring the stability and reliability of the shock absorber during operation. When shock absorption treatment is required for the system, the lower guide rod 16 will move upward relative to the upper guide rod 15. During this process, the lower abutting portion 25 will move upward accordingly and apply pressure to the second shock absorber 7. This pressure will cause the second shock absorber 7 to undergo compressive deformation, thereby absorbing and dispersing vibration energy to achieve the purpose of shock absorption. In this way, the vibration amplitude of the entire system can be effectively controlled, thereby improving the stability and service life of the equipment.

[0035] Preferably, pushing portions 26 are provided in pairs on the backrest frame 3, and the pushing portions 26 are located in the upper middle part of the backrest frame 3.

[0036] Preferably, the footrest 2 includes a pair of footrest portions 27 and support rods 28. One end of the support rod 28 is connected to the seat frame 1, and the other end is connected to the footrest portion 27.

[0037] Preferably, an armrest frame 29 is further provided on the seat frame 1, and the armrest frame 29 is located on both sides of the seat frame 1.

[0038] The above embodiments are only preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A multi-wheel independent shock-absorbing wheelchair, characterized in that, It includes a seat frame (1), a footrest frame (2) and a backrest frame (3) respectively arranged at the front and rear ends of the seat frame (1). The lower end of the seat frame (1) is provided with a pair of front wheels (4) and rear wheels (5). The front wheels (4) are located on the side close to the footrest frame (2), and the rear wheels (5) are located on the side close to the backrest frame (3). A first shock absorber (6) is provided between the front wheels (4) and the seat frame (1), and the position of the first shock absorber (6) corresponds to the position of the front wheels (4) one by one. A second shock absorber (7) is provided between the rear wheels (5) and the seat frame (1), and the position of the second shock absorber (7) corresponds to the position of the rear wheels (5) one by one. The first shock absorber (6) and the second shock absorber (7) can independently drive the corresponding front wheels (4) or rear wheels (5) to perform shock absorption.

2. The multi-wheel independent shock-absorbing wheelchair according to claim 1, wherein: A pair of connecting frames (8) are provided on the seat frame (1), and the connecting frames (8) are located on both sides of the seat frame (1). An installation member (9) is provided on the connecting frame (8), and an installation hole (10) is opened on the installation member (9). A front wheel frame (11) is provided on the front wheels (4), and a connecting member (12) is provided on the front wheel frame (11). The upper end of the connecting member (12) passes through the installation hole (10) and can move up and down relative to the installation hole (10). The front wheel frame (11) is connected to the connecting frame (8) through the connecting member (12). The first shock absorber (6) is sleeved on the connecting member (12). The upper end of the first shock absorber (6) abuts against the installation member (9), and the lower end abuts against the front wheel frame (11). When the front wheels (4) move upward, the front wheel frame (11) moves upward accordingly and squeezes the first shock absorber (6) to contract. When the first shock absorber (6) resets, it drives the front wheel frame (11) to move downward.

3. The multi-wheel independent shock-absorbing wheelchair according to claim 2, characterized in that: A rear wheel frame (14) is provided on the rear wheels (5). An upper guide rod (15) and a lower guide rod (16) are provided at the upper end of the rear wheel frame (14). A receiving groove is opened on the upper guide rod (15), and the inner diameter of the receiving groove is larger than the diameter of the lower guide rod (16). The upper end of the lower guide rod (16) passes through the receiving groove. The upper end of the upper guide rod (15) is connected to the seat frame (1). The second shock absorber (7) is sleeved on the upper guide rod (15) and the lower guide rod (16). When the rear wheels (5) move upward, the rear wheel frame (14) moves upward accordingly and squeezes the second shock absorber (7) to contract. When the second shock absorber (7) resets, it drives the rear wheel frame (14) to move downward.

4. The multi-wheel independent shock-absorbing wheelchair according to claim 3, wherein: A pair of fixing parts (18) are provided at the rear end of the seat frame (1). A rotating groove is opened on the fixing part (18), and rotating holes (20) are opened on both sides of the rotating groove. A rotating shaft (21) is provided at the upper end of the upper guide rod (15). The two sides of the rotating shaft (21) are respectively connected to the rotating holes (20) on both sides of the rotating groove and can rotate relative to the fixing part (18), so that the rear wheel frame (14) can rotate relative to the seat frame (1).

5. The multi-wheel independent shock-absorbing wheelchair according to claim 3, wherein: A rotating shaft (22) is provided on the connecting frame (8). A rotating part (13) is provided at the front end of the rear wheel frame (14). Connecting holes (23) are formed on both sides of the rotating part (13). The rotating shaft (22) is inserted into the connecting holes (23). The rotating part (13) is connected to the connecting frame (8) through the connecting holes (23) and can rotate relative to the connecting frame (8) around the rotating shaft (22).

6. The multi-wheel independent shock-absorbing wheelchair according to claim 3, wherein: An upper abutting part (24) is provided at the upper end of the upper guide rod (15), and a lower abutting part (25) is provided at the lower end of the lower guide rod (16). The upper end of the second shock absorber (7) is connected to the upper abutting part (24), and the lower end is connected to the lower abutting part (25). When the lower guide rod (16) moves upward relative to the upper guide rod (15), the lower abutting part (25) moves upward to squeeze the second shock absorber (7) to contract.

7. A multi-wheel independent shock-absorbing wheelchair according to any one of claims 1-6, characterized in that: Pairs of pushing parts (26) are provided on the backrest frame (3), and the pushing parts (26) are located in the upper middle part of the backrest frame (3).

8. A multi-wheel independent shock-absorbing wheelchair according to any one of claims 1-6, characterized in that: The footrest (2) includes paired footrest parts (27) and support rods (28). One end of the support rod (28) is connected to the seat frame (1), and the other end is connected to the footrest part (27).

9. A multi-wheel independent shock-absorbing wheelchair according to any one of claims 1-6, characterized in that: An armrest frame (29) is further provided on the seat frame (1), and the armrest frame (29) is located on both sides of the seat frame (1).

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