Wheel damping device for wheelchair
By installing front and rear wheel shock absorption components on the wheelchair, and using connecting rods and shock-absorbing springs to absorb vibrations, the problem of poor shock absorption when traditional wheelchairs travel on uneven roads is solved, improving riding comfort and wheelchair stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TOUSDA MEDICAL TECH CO LTD
- Filing Date
- 2025-05-21
- Publication Date
- 2026-04-24
AI Technical Summary
Traditional wheelchairs vibrate significantly when traveling on uneven surfaces, causing fatigue and potential health risks for riders, and have poor shock absorption.
The wheelchair's frame is equipped with front and rear wheel shock absorption components, including connecting rods and shock-absorbing springs. The compression and stretching of the springs absorb and buffer vibrations, ensuring the smoothness of the wheelchair's movement and the comfort of the rider.
It effectively absorbs and cushions vibrations during wheelchair movement, improving the user experience and the durability of the wheelchair frame, and reducing the impact on the rider's body.
Smart Images
Figure CN224155915U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wheelchair technology, specifically a wheel shock absorption device for wheelchairs. Background Technology
[0002] In modern society, wheelchairs, as an important assistive mode of transportation, provide convenience for many people with mobility impairments, helping them to better participate in social activities and improve their quality of life.
[0003] Traditional wheelchairs rely solely on the rigid structure of their frame to withstand vibrations generated during movement. While they may maintain relative stability on flat surfaces, when traveling on uneven terrain, the impact force between the front and rear wheels and the ground is directly and rapidly transmitted to the wheelchair frame and the rider. The rider experiences significant bumps and vibrations, which become increasingly pronounced with the distance traveled. This not only leads to fatigue and muscle aches but also, with prolonged exposure to such vibrations, may cause potential damage to the rider's bones, joints, and other parts of the body, impacting their overall health. Utility Model Content
[0004] To address the aforementioned shortcomings, this utility model proposes a wheel shock absorption device for wheelchairs. By installing front wheel shock absorption components and rear wheel shock absorption components on a fixed frame, it can effectively absorb and buffer vibrations during wheelchair operation. This not only improves the user experience but also solves the problem of vibration damage to the wheelchair frame, thus resolving the issue of poor shock absorption in traditional wheelchairs.
[0005] To achieve this objective, the present invention adopts the following technical solution:
[0006] A wheel shock absorption device for a wheelchair includes a rear wheel, a mounting frame, a rear wheel shock absorption assembly, a front wheel shock absorption assembly, and a front wheel, wherein the mounting frame is used to connect the rear wheel, the wheelchair body, and the front wheel;
[0007] An L-shaped frame is provided at the end of the fixed frame near the rear wheel. The vertical end of the L-shaped frame is fixedly installed on the fixed frame. The mounting end of the rear wheel shock absorber is connected to the L-shaped frame. The movable end of the rear wheel shock absorber is connected to the rear wheel. The space between the horizontal end of the L-shaped frame and the fixed frame forms a buffer space for the rear wheel.
[0008] The mounting end of the front wheel shock absorber is connected to the end of the mounting bracket near the front wheel, and the movable end of the front wheel shock absorber is connected to the front wheel.
[0009] The rear wheel shock absorber assembly includes a connecting rod and a first shock absorber spring. The mounting end of the connecting rod is hinged to the vertical end of the L-shaped frame, and the movable end of the connecting rod is connected to the rear wheel via a rotating shaft.
[0010] The first shock-absorbing spring vertically connects the movable section of the connecting rod to the horizontal end of the L-shaped frame.
[0011] The horizontal end of the L-shaped frame is provided with a vertical guide rod, the connecting rod is provided with a movable hole, the guide rod passes vertically through the movable hole, and the end of the guide rod is fixedly connected to the fixed frame.
[0012] The fixing frame includes a first horizontal part, a connecting part, and a second horizontal part. The first horizontal part is located directly above the second horizontal part. The connecting part connects the end of the first horizontal part and the end of the second horizontal part. The fixing frame has a U-shaped structure with a horizontal opening.
[0013] The vertical end of the L-shaped frame is fixedly connected to the second horizontal part. The first horizontal part is provided with a vertical fixing rod, which vertically connects the second horizontal part, the connecting rod, and the horizontal end of the L-shaped frame.
[0014] The front wheel shock absorber assembly includes a mounting block, a buffer frame, and a second shock absorber spring. The mounting block is fixedly installed on the second horizontal part, and the bottom of the mounting block is fixedly connected to the mounting end of the buffer frame. The buffer end of the buffer frame is rotatably connected to the front and rear. The second shock absorber spring is vertically connected to the mounting end and the buffer end of the buffer frame. The second shock absorber spring is used to adjust the compression or extension of the buffer frame to reduce the vibration amplitude of the fixed frame.
[0015] The buffer frame includes a first buffer part and a second buffer part; the top of the first buffer part is fixedly connected to the bottom of the mounting block, the bottom of the first buffer part is hinged to the top of the second buffer part, the bottom of the second buffer part is rotatably connected to the front wheel, and the second shock-absorbing spring is vertically connected to the first buffer part and the second buffer part. The buffer frame is used to reduce the vibration amplitude of the front wheel.
[0016] The movable hole is elliptical in shape, and the length direction of the movable hole is consistent with the length direction of the connecting rod.
[0017] The technical solution of this utility model can include the following beneficial effects:
[0018] 1. By installing front and rear wheel shock absorption components on the fixed frame, vibrations during wheelchair movement can be effectively absorbed and buffered. This not only improves the user experience but also solves the problem of vibration damage to the wheelchair frame, addressing the issue of poor shock absorption in traditional wheelchairs.
[0019] 2. The coordinated operation of the connecting rod and the first shock-absorbing spring can efficiently absorb and buffer various vibrations and impacts encountered by the rear wheels during driving. Whether it is a raised obstacle or a bumpy road surface, the compression and extension of the first shock-absorbing spring can reduce the impact on the wheelchair and the rider, greatly improving the stability of the wheelchair and the comfort of riding. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of a wheel shock absorption device according to one embodiment of the present invention;
[0021] Figure 2 This is a schematic diagram of a fixing bracket according to one embodiment of the present invention;
[0022] Among them, 1. Rear wheel; 2. Fixing frame; 21. First horizontal part; 22. Connecting part; 23. Second horizontal part; 24. Fixing rod; 3. Rear wheel shock absorption assembly; 31. Connecting rod; 32. First shock absorption spring; 4. Front wheel shock absorption assembly; 41. Mounting block; 42. Buffer frame; 43. Second shock absorption spring; 44. First buffer part; 45. Second buffer part; 5. Front wheel; 6. L-shaped frame; 7. Guide rod. Detailed Implementation
[0023] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.
[0024] In the description of this utility model, it should be understood that the terms "length", "middle", "upper", "lower", "left", "right", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, 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.
[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "assembly," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of 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.
[0027] The following is combined Figures 1 to 2 This invention describes a wheelchair shock absorption device according to an embodiment of the present invention.
[0028] A wheel shock absorption device for a wheelchair includes a rear wheel 1, a fixing frame 2, a rear wheel shock absorption assembly 3, a front wheel shock absorption assembly 4, and a front wheel 5. The fixing frame 2 is used to connect the rear wheel 1, the wheelchair body, and the front wheel 5.
[0029] An L-shaped frame 6 is provided at the end of the fixed frame 2 near the rear wheel 1. The vertical end of the L-shaped frame 6 is fixedly installed on the fixed frame 2. The mounting end of the rear wheel shock absorber 3 is connected to the L-shaped frame 6. The movable end of the rear wheel shock absorber 3 is connected to the rear wheel 1. The space between the horizontal end of the L-shaped frame 6 and the fixed frame 2 forms a buffer space for the rear wheel 1.
[0030] The mounting end of the front wheel shock absorber 4 is connected to the end of the fixing frame 2 near the front wheel 5, and the movable end of the front wheel shock absorber 4 is connected to the front wheel 5.
[0031] The fixing frame 2 connects the rear wheel 1, the wheelchair body, and the front wheel 5 in sequence, forming a tight, integrated structure that effectively resists external impacts and torsion. This maintains the stability of the wheelchair's shape during operation, preventing wobbling and deformation due to a loose structure, thus improving the wheelchair's durability and reliability.
[0032] An L-shaped frame 6 is provided at the end of the fixed frame 2 near the rear wheel 1. The L-shaped frame 6 provides an installation position for the rear wheel shock absorption assembly 3. The space between the horizontal end of the L-shaped frame 6 and the fixed frame 2 forms a buffer space for the rear wheel 1. When the rear wheel 1 encounters a bump, the rear wheel shock absorption assembly 3 can function in this buffer space to reduce the impact of vibration on the wheelchair and the rider.
[0033] Next, a front wheel shock absorber 4 is installed at the end of the mounting bracket 2 away from the rear wheel 1. The front wheel shock absorber 4 can efficiently absorb and disperse the vibration of the front wheel 5 caused by uneven road surface during driving, creating a more stable and comfortable riding environment for passengers and further improving the riding comfort of users.
[0034] Therefore, by setting the front wheel shock absorber 4 and the rear wheel shock absorber 3 on the fixed frame 2, this utility model can effectively absorb and buffer the vibration during the wheelchair's movement, which can not only improve the user's experience, but also solve the problem of vibration damage to the wheelchair frame and solve the problem of poor shock absorption in traditional wheelchairs.
[0035] The rear wheel shock absorber assembly 3 includes a connecting rod 31 and a first shock absorber spring 32. The mounting end of the connecting rod 31 is hinged to the vertical end of the L-shaped frame 6, and the movable end of the connecting rod 31 is connected to the rear wheel 1 through a rotating shaft.
[0036] The first shock-absorbing spring 32 is vertically connected to the movable section of the connecting rod 31 and the horizontal end of the L-shaped frame 6.
[0037] When the wheel travels onto a raised obstacle, the rear wheel 1 experiences an upward impact force. Since the mounting end of the connecting rod 31 is hinged to the vertical end of the L-shaped frame 6, and the movable end is connected to the rear wheel 1 via a pivot, the upward movement of the rear wheel 1 drives the connecting rod 31 to move, causing the movable end of the connecting rod 31 to rotate upwards around the mounting end. As the movable end of the connecting rod 31 continues to rise, the first shock-absorbing spring 32 is compressed, absorbing and storing the impact energy received by the rear wheel 1, converting mechanical energy into the elastic potential energy of the spring. This slows down the upward speed and amplitude of the fixed frame 2, preventing the wheelchair from violently shaking due to sudden impacts.
[0038] Once the rear wheel 1 has passed the raised obstacle, it is no longer subjected to upward impact. At this point, the first damping spring 32 begins to release its previously stored elastic potential energy. The elastic restoring force of the first damping spring 32 pushes the movable end of the connecting rod 31 downward, restoring the connecting rod 31 to its original angle and position. The downward movement of the movable end of the connecting rod 31 then drives the rear wheel 1 downward, ensuring that the rear wheel 1 re-establishes close contact with the ground and maintains the stability of the wheelchair.
[0039] Furthermore, when the rear wheel 1 of the wheelchair travels onto a bumpy surface, it experiences a downward force, causing the movable end of the connecting rod 31 to rotate downwards around its mounting end, thus stretching the first shock-absorbing spring 32. During the stretching process, the first shock-absorbing spring 32 also absorbs and stores energy, preventing the rear wheel 1 from sinking excessively, reducing the severe vibrations caused by the bumpy surface, and ensuring the comfort of the occupant.
[0040] Therefore, the coordinated operation of the connecting rod 31 and the first shock-absorbing spring 32 can efficiently absorb and buffer various vibrations and impacts encountered by the rear wheel 1 during driving. Whether it is a raised obstacle or a bumpy road surface, the compression and extension of the first shock-absorbing spring 32 can reduce the impact on the wheelchair and the rider, greatly improving the stability of the wheelchair and the comfort of riding.
[0041] The horizontal end of the L-shaped frame 6 is provided with a vertical guide rod 7, the connecting rod 31 is provided with a movable hole, the guide rod 7 passes vertically through the movable hole, and the end of the guide rod 7 is fixedly connected to the fixed frame 2.
[0042] The guide rod 7 provides precise guidance for the up-and-down movement of the connecting rod 31, enabling the connecting rod 31 to move stably in the vertical direction when subjected to the impact of the rear wheel 1 or the restoring force of the spring. This ensures that the first damping spring 32 can be compressed and stretched in the correct direction, fully exerting its damping and buffering effect, and improving the consistency and reliability of the damping effect.
[0043] Furthermore, the guide rod 7 enhances the structural strength and stability of the entire shock absorption device. By tightly connecting the L-shaped frame 6, connecting rod 31, and fixing rod 24 into a whole, the connection strength between the various components of the rear wheel 1 shock absorption device can be increased, improving the rigidity of the entire rear wheel shock absorption assembly 3. This allows the wheelchair to better resist the impact and torsion of external forces during operation, maintaining the stability and integrity of the structure.
[0044] The fixing frame 2 includes a first horizontal part 21, a connecting part 22, and a second horizontal part 23. The first horizontal part 21 is located directly above the second horizontal part 23. The connecting part 22 connects the end of the first horizontal part 21 and the end of the second horizontal part 23. The fixing frame 2 has a U-shaped structure with a horizontal opening.
[0045] The vertical end of the L-shaped frame 6 is fixedly connected to the second horizontal part 23. The first horizontal part 21 is provided with a vertical fixing rod 24, which vertically connects the second horizontal part 23, the connecting rod 31 and the horizontal end of the L-shaped frame 6.
[0046] The first horizontal section 21, the connecting section 22, and the second horizontal section 23 form a stable U-shaped structure. Through the interconnection of each part, external forces from different directions can be effectively dispersed and borne, greatly enhancing the structural rigidity of the entire rear wheel shock absorption device and even the wheelchair, reducing structural deformation and damage caused by external forces, and extending the service life of the wheelchair.
[0047] Furthermore, the fixing rod 24 vertically connects the second horizontal part 23 to the horizontal end of the L-shaped frame 6, enhancing the connection stability between the L-shaped frame 6 and the fixing frame 2, so that the L-shaped frame 6 can be firmly fixed on the fixing frame 2, providing a reliable installation base for the rear wheel shock absorber assembly 3, and ensuring that the shock absorber assembly will not affect the shock absorption effect due to loose connection during operation.
[0048] Meanwhile, the interaction between the fixing rod 24, the L-shaped frame 6, and the fixing frame 2 can further absorb and disperse vibration energy, enhance the shock absorption effect, and thus provide passengers with a smoother riding experience.
[0049] The front wheel shock absorber assembly 4 includes a mounting block 41, a buffer frame 42, and a second shock absorber spring 43. The mounting block 41 is fixedly mounted on the second horizontal part 23. The bottom of the mounting block 41 is fixedly connected to the mounting end of the buffer frame 42. The buffer end of the buffer frame 42 is rotatably connected to the front and rear. The second shock absorber spring 43 is vertically connected to the mounting end and the buffer end of the buffer frame 2. The second shock absorber spring 43 is used to adjust the compression or extension of the buffer frame to reduce the vibration amplitude of the fixed frame 2.
[0050] When the front wheel 5 travels onto a raised obstacle, it experiences an upward impact force, causing the buffer end of the buffer unit to move upward. This shortens the distance between the mounting end and the buffer end of the buffer frame 42, thereby compressing the second damping spring 43. During compression, the second damping spring 43 converts the impact energy of the front wheel 5 into its own elastic potential energy, absorbing and buffering most of the impact force. This reduces the speed and amplitude of the upward movement of the front wheel 5, preventing the fixed frame 2 from experiencing severe jolts due to a sudden large impact on the front wheel 5.
[0051] When the front wheel 5 passes over the raised obstacle, the elastic restoring force of the second shock absorber spring 43 will push the buffer end of the buffer frame 42 downward, so that the buffer frame 42 returns to a position and angle close to the original, and drives the front wheel 5 to make smooth contact with the ground again.
[0052] Therefore, on uneven ground, the front wheel shock absorber 4 will continuously repeat the above compression and stretching process to ensure that the front wheel 5 can always maintain relatively stable contact with the ground, providing stable driving support for the wheelchair and reducing the impact of vibration on the wheelchair as a whole and the rider.
[0053] The buffer frame 42 includes a first buffer part 44 and a second buffer part 45; the top of the first buffer part 44 is fixedly connected to the bottom of the mounting block 41, the bottom of the first buffer part 44 is hinged to the top of the second buffer part 45, the bottom of the second buffer part 45 is rotatably connected to the front wheel 5, and the second shock-absorbing spring 43 is vertically connected to the first buffer part 44 and the second buffer part 45. The buffer frame 42 is used to reduce the vibration amplitude of the front wheel 5.
[0054] When encountering minor vibrations, the buffer frame 42 can absorb energy through the slight movement of the second buffer part 45 and the minor deformation of the second damping spring 43; while when encountering a larger impact, the first buffer part 44 and the second buffer part 45 can move in coordination, and the second damping spring 43 is further compressed to provide greater cushioning force. This ability to automatically adjust the cushioning method according to the vibration intensity allows the buffer frame 42 to adapt to various complex road conditions and different usage scenarios.
[0055] The movable hole is elliptical in shape, and the length direction of the movable hole is consistent with the length direction of the connecting rod 31.
[0056] When the wheelchair encounters vibrations, the connecting rod 31 will reciprocate as the shock-absorbing components extend and retract. The elliptical movable hole provides sufficient and suitable movement space for the connecting rod 31, avoiding obstruction of the movement of the connecting rod 31 due to mismatch in the shape or direction of the movable hole, ensuring that the connecting rod 31 can move smoothly, thereby ensuring the normal operation of the entire rear wheel 1 shock absorption device.
[0057] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.
Claims
1. A wheelchair shock absorption device, characterized in that, It includes a rear wheel, a mounting frame, a rear wheel shock absorber assembly, a front wheel shock absorber assembly, and a front wheel, wherein the mounting frame is used to connect the rear wheel, the wheelchair body, and the front wheel; An L-shaped frame is provided at the end of the fixed frame near the rear wheel. The vertical end of the L-shaped frame is fixedly installed on the fixed frame. The mounting end of the rear wheel shock absorber is connected to the L-shaped frame. The movable end of the rear wheel shock absorber is connected to the rear wheel. The space between the horizontal end of the L-shaped frame and the fixed frame forms a buffer space for the rear wheel. The mounting end of the front wheel shock absorber is connected to the end of the mounting bracket near the front wheel, and the movable end of the front wheel shock absorber is connected to the front wheel.
2. The wheel shock absorption device for a wheelchair according to claim 1, characterized in that, The rear wheel shock absorber assembly includes a connecting rod and a first shock absorber spring. The mounting end of the connecting rod is hinged to the vertical end of the L-shaped frame, and the movable end of the connecting rod is connected to the rear wheel via a rotating shaft. The first shock-absorbing spring vertically connects the movable section of the connecting rod to the horizontal end of the L-shaped frame.
3. A wheelchair shock absorption device according to claim 2, characterized in that, The horizontal end of the L-shaped frame is provided with a vertical guide rod, the connecting rod is provided with a movable hole, the guide rod passes vertically through the movable hole, and the end of the guide rod is fixedly connected to the fixed frame.
4. A wheelchair shock absorption device according to claim 3, characterized in that, The fixing frame includes a first horizontal part, a connecting part, and a second horizontal part. The first horizontal part is located directly above the second horizontal part. The connecting part connects the end of the first horizontal part and the end of the second horizontal part. The fixing frame has a U-shaped structure with a horizontal opening. The vertical end of the L-shaped frame is fixedly connected to the second horizontal part. The first horizontal part is provided with a vertical fixing rod, which vertically connects the second horizontal part, the connecting rod, and the horizontal end of the L-shaped frame.
5. A wheelchair shock absorption device according to claim 4, characterized in that, The front wheel shock absorber assembly includes a mounting block, a buffer frame, and a second shock absorber spring. The mounting block is fixedly installed on the second horizontal part, and the bottom of the mounting block is fixedly connected to the mounting end of the buffer frame. The buffer end of the buffer frame is rotatably connected to the front and rear. The second shock absorber spring is vertically connected to the mounting end and the buffer end of the buffer frame. The second shock absorber spring is used to adjust the compression or extension of the buffer frame to reduce the vibration amplitude of the fixed frame.
6. A wheelchair shock absorption device according to claim 5, characterized in that, The buffer frame includes a first buffer part and a second buffer part; the top of the first buffer part is fixedly connected to the bottom of the mounting block, the bottom of the first buffer part is hinged to the top of the second buffer part, the bottom of the second buffer part is rotatably connected to the front wheel, and the second shock-absorbing spring is vertically connected to the first buffer part and the second buffer part. The buffer frame is used to reduce the vibration amplitude of the front wheel.
7. A wheelchair shock absorption device according to claim 3, characterized in that, The movable hole is elliptical in shape, and the length direction of the movable hole is consistent with the length direction of the connecting rod.