A manual wheelchair braking system that allows for single-person ramp braking and easy stopping and starting on inclines.

Abstract

This utility model provides a manual wheelchair braking system that allows for single-person ramp braking and easy stopping and starting on inclines. It includes a manual wheelchair with a circular tube and rolling wheels. The system also includes a support member fixedly connected to the circular tube via a clamp. A braking assembly is oscillatingly mounted on the support member. The braking assembly includes a brake wheel and a switch lever. A stop block is fixedly mounted on the switch lever. An arc-shaped groove with a 90° arc center angle is provided on the brake wheel corresponding to the stop block. An eccentric hinge hole is provided on the brake wheel, through which it is fixed to the support member. A tension spring is also provided inside the brake wheel, with one end fixed to the inner circumferential wall of the brake wheel and the other end fixedly connected to the stop block. The braking assembly also includes a parking handle hinged to a movable plate, on which the brake wheel is rotatably mounted.

Description

Technical Field

[0001] This utility model relates to the field of wheelchair braking technology, specifically a manual wheelchair braking system that allows for single-person braking on ramps and enables stopping and starting as needed when going uphill. Background Technology

[0002] Manual wheelchairs, as a common mobility aid, are primarily propelled by the user pushing the wheels. However, this method of propulsion presents significant safety hazards when facing complex terrain such as slopes. Due to gravity, if the user stops pushing the wheelchair while going uphill due to exhaustion or the need for a short rest, the wheelchair immediately risks sliding backward. This could not only cause the user to fall and get injured, but also pose a threat to the surrounding environment.

[0003] To address this issue, various anti-skid braking devices have emerged on the market. However, most of these existing technologies have significant limitations. First, many devices are structurally complex, often involving precision linkages, gears, or multi-stage locking mechanisms. This not only leads to high manufacturing costs and complex production processes but also makes routine maintenance and troubleshooting exceptionally difficult, thus affecting product adoption and reliability.

[0004] More importantly, most existing devices can only brake when the vehicle is parked. This means that when going uphill, the user must first come to a complete stop and then manually operate the locking device to prevent backward slippage. This operating mode cannot achieve the "stop and go" function, seriously affecting the convenience of use. When the user needs to rest briefly or encounters an emergency while pushing the vehicle, the inability to lock the wheelchair immediately and automatically greatly reduces the safety of the wheelchair and violates the original intention of mobility aids to provide independence and convenience. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a manual wheelchair braking system that is simple in structure, easy to operate, safe and reliable, and can brake on a single ramp and stop and go as needed when going uphill.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A manual wheelchair braking system capable of braking on a single ramp and stopping and starting on inclines includes a manual wheelchair equipped with a circular tube and rolling wheels. The system also includes:

[0008] A support member is fixedly connected to the circular tube by a pipe clamp, providing a stable mounting base for the braking assembly.

[0009] A braking assembly is provided, which is pivotally mounted on the support member. The braking assembly includes a core brake wheel and a switch shift lever. A stop block is fixedly mounted on the switch shift lever. An arc-shaped groove is provided on the brake wheel corresponding to the stop block, with a central angle of 90°, to limit the swing range of the switch shift lever and define different operating modes. An eccentric hinge hole is provided on the brake wheel, through which the brake wheel is pivotally fixed to the support member.

[0010] In order to achieve state reset after mode switching, a tension spring is also provided inside the brake balance wheel. One end of the tension spring is fixed to the inner peripheral wall of the brake balance wheel, and the other end is fixedly connected to the stop block to provide restoring force.

[0011] In addition, the braking assembly includes a parking handle for conventional parking braking. The parking handle is hinged to a movable plate, on which the brake wheel is rotatably mounted. By operating the parking handle, the movable plate can be moved, causing the brake wheel to engage or disengage from the wheels of the manual wheelchair, thus achieving the parking braking function.

[0012] In a preferred embodiment, a friction toothed ring is fitted around the outer periphery of the brake balance wheel. By providing the friction toothed ring, the friction between the brake balance wheel and the rolling wheel is increased, ensuring that a sufficiently large braking torque can be generated during braking, especially on slopes, preventing slippage and improving braking reliability.

[0013] In another preferred embodiment, the brake balance wheel is mounted on the movable plate via a connecting shaft, a retaining ball is slidably disposed inside the switch shift lever, a recess corresponding to the retaining ball is provided on the connecting shaft, and a locking spring is provided between the switch shift lever and the retaining ball.

[0014] For ease of installation and adjustment, the manual wheelchair also includes a handle. The switch lever and the parking handle are preferably located below the handle, which is ergonomic and convenient for users to operate at any time.

[0015] In addition, to accommodate manual wheelchairs of different models or diameters, an extension rod may be included, which is disposed between the tube clamp and the support member, increasing the system's installation adaptability.

[0016] Preferably, the pipe clamp includes a first hole for connecting to the extension rod and a second hole for connecting to the circular pipe, and the inner peripheral walls of both the first hole and the second hole are provided with friction grooves.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. Dual braking modes, comprehensive functions: This system integrates an anti-slip mode for "stop and go on inclines" and a regular "parking brake" mode. Users can easily switch to the anti-slip mode by operating the switch lever, so there is no need to worry about slipping backward when going uphill. Once the force is stopped, the wheelchair will automatically lock. On flat ground or when parking for a long time, the parking handle can be used for reliable parking braking.

[0019] 2. Simplified structure and low cost: This utility model achieves the core mode switching and braking functions through the clever design of the brake swing wheel, stop block and arc-shaped slide groove, avoiding complex linkage or gear mechanism, making the overall structure compact and simple, thereby significantly reducing manufacturing cost and maintenance difficulty. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0022] Figure 2 This is a three-dimensional structural cross-sectional view of the braking component in one embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the parking handle in one embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the switch shift lever in the "uphill position" in one embodiment of the present invention.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Circular tubular fitting; 2. Roller wheel; 3. Support component; 4. Pipe clamp; 41. First hole; 42. Second hole; 5. Braking assembly; 6. Brake balance wheel; 7. Switch shift lever; 8. Stop block; 9. Arc-shaped slide groove; 10. Hinge hole; 11. Tension spring; 12. Parking handle; 13. Movable plate; 131. Transmission connecting rod; 14. Friction gear ring; 15. Clamping ball; 16. Locking spring; 17. Handle; 18. Extension rod; 19. Connecting shaft. Detailed Implementation

[0027] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product.

[0028] It will be understood by those skilled in the art that certain well-known structures and their descriptions may be omitted in the accompanying drawings. The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0029] Example 1

[0030] like Figure 1-4 The present invention provides a manual wheelchair braking system that allows for single-person ramp braking and easy stopping and starting on inclines, installed on a standard manual wheelchair. The manual wheelchair mainly includes a frame (containing a circular tubular component 1), a seat, a backrest, and casters 2.

[0031] First, the support member 3 is secured to the circular tube 1 of the manual wheelchair frame using the clamp 4. Depending on the wheelchair model, an extension rod 18 can be added between the clamp 4 and the support member 3 to adjust the relative position between the braking assembly 5 and the roller 2. The support member 3 provides a stable mounting platform for the subsequent installation of the braking assembly 5.

[0032] The pipe clamp 4 includes a first hole 41 connected to the extension rod 18 and a second hole 42 connected to the circular pipe 1. The inner peripheral walls of both the first hole 41 and the second hole 42 are provided with friction grooves.

[0033] The braking component 5 is the core of this invention. It is oscillatingly mounted on the support member 3.

[0034] The braking assembly 5 includes a parking handle 12, which is hinged to a movable plate 13 via a pin. A brake wheel 6 is rotatably mounted on the movable plate 13 via a central pivot. A transmission link 131 is hinged between the parking handle 12 and the movable plate 13. Under normal driving conditions, the parking handle 12 is in the released position, and the brake wheel 6 is separated from the wheel 2 of the manual wheelchair, without interference. When a long-term parking is required, the user pulls the parking handle 12. The handle moves the movable plate 13, thereby pushing the entire brake wheel 6 firmly against the outer tire of the wheel 2. Preferably, a friction ring 14 is provided on the outer periphery of the brake wheel 6. The high-friction coefficient material of the friction ring 14 can generate a large frictional force with the outer tire of the wheel 2, thereby locking the wheel 2 and achieving reliable parking braking.

[0035] Uphill anti-skid mode (stop and go):

[0036] The switching and implementation of this mode is accomplished by the mechanism inside the switch shift lever 7, the brake balance wheel 6, and the locking ball 15.

[0037] A hinge hole 10 is eccentrically positioned on the brake balance wheel 6. The entire brake balance wheel 6 is hinged to the support member 3 through this hinge hole 10, allowing it to swing slightly around this hinge hole 10. The shift lever 7 is also installed nearby, with a stop block 8 securely mounted on it. A corresponding arc-shaped groove 9 is cut into the disc surface of the brake balance wheel 6, and the end of the stop block 8 slides into this groove. The arc angle of this groove is 90°, which defines two extreme positions of the shift lever 7: "driving position" and "uphill position".

[0038] Furthermore, the brake balance wheel is mounted on the movable plate via a connecting shaft 19. A retaining ball 15 is slidably disposed inside the switch shift lever 7. A corresponding recess for the retaining ball 15 is provided on the connecting shaft 19. A locking spring is provided between the switch shift lever 7 and the retaining ball 15. The retaining ball 15 allows the switch shift lever 7 to be held in the "driving position" or "uphill position," preventing accidental vibrations from causing the switch shift lever 7 to move.

[0039] When the switch shift lever 7 is in the "driving position", the stop block 8 is located at one end of the slide groove. At this time, the brake swing wheel 6 maintains a safe gap with the rolling wheel 2 under its own weight or the action of the spring, which does not affect the wheelchair's free forward or backward movement.

[0040] When the user is ready to go uphill, the switch lever 7 can be moved to the "uphill position". At this time, the stop block 8 slides along the arc-shaped slide groove 9 to the other end. During this process, the stop block 8 will push the brake balance wheel 6 to swing around its hinge hole 10, so that the friction ring 14 on the brake balance wheel 6 gently rests against the rolling wheel 2.

[0041] To aid in the stability of mode switching and provide a restoring force, a tension spring 11 is installed inside the brake balance wheel 6, with one end connected to the stop block 8 and the other end connected to the inner wall of the brake balance wheel 6. When the switch shift lever 7 is moved from the "uphill position" back to the "drive position", the spring provides a restoring force to help the brake balance wheel 6 quickly disengage from the roller 2.

[0042] The working principle of this embodiment is as follows:

[0043] When moving uphill: When the shift lever 7 is moved from the "drive" position back to the "uphill" position, the movement of the shift lever 7 causes the brake balance wheel 6 to move, so that the outer circumference of the brake balance wheel 6 contacts the outer circumference of the roller. When the roller 2 rotates in the uphill direction, the roller 2 overcomes the elastic force of the tension spring 11 and pushes the brake balance wheel 6 away from the roller 2, so that the roller 2 can rotate independently of the brake balance wheel 6.

[0044] When stopping uphill or sliding backward: Once the user stops applying force, gravity will cause the wheelchair to tend to slide backward. The roller 2 attempts to reverse, causing the friction ring 14 to rotate in the opposite direction. Due to the blocking effect, the roller 2 will cause the brake wheel 6 to swing towards the roller 2, thereby making the brake wheel 6 firmly abut against the roller 2, thus stopping the rotation of the roller 2.

[0045] Downhill deceleration control: When shifting the switch lever 7 from "uphill position" back to "drive position", gently push the parking handle 12. Depending on the steepness of the downhill slope and the required speed, gradually increase or decrease the grip force, allowing the parking handle 12 to drive the brake wheel 6 to slowly press against the outer tire of the rolling wheel 2, thereby achieving deceleration.

[0046] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. 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 wheelchair braking system capable of braking on a single ramp and stopping and starting on an incline, comprising a manual wheelchair, wherein the manual wheelchair is provided with a circular tube and rolling wheels, characterized in that, Also includes: A support member is fixedly connected to the circular tube by a pipe clamp; a braking assembly is oscillatingly mounted on the support member. The braking assembly includes a brake wheel and a switch shift lever. A stop block is fixedly installed on the switch shift lever. An arc-shaped groove is provided on the brake wheel corresponding to the stop block. The arc center angle of the arc-shaped groove is 90°. A hinge hole is eccentrically provided on the brake wheel. The brake wheel is fixed to the support member through the hinge hole. The brake balance wheel is also equipped with a tension spring. One end of the tension spring is fixed to the inner circumferential wall of the brake balance wheel, and the other end is fixedly connected to the stop block. The braking assembly also includes a parking handle and a movable plate that can be swung on the manual wheelchair. A transmission link is hinged between the movable plate and the parking handle, and the brake swing wheel is rotatably mounted on the movable plate. By moving the parking handle, the brake wheel can be brought into contact with the rolling wheel of the manual wheelchair.

2. The manual wheelchair braking system according to claim 1, which allows for single-person ramp braking and stops and starts on inclines, is characterized in that... The brake balance wheel is fitted with a friction toothed ring on its outer periphery.

3. The manual wheelchair braking system according to claim 1, which allows for single-person ramp braking and stops and starts on inclines, is characterized in that... The brake swing wheel is mounted on the movable plate via a connecting shaft. A retaining ball is slidably disposed inside the switch shift lever. A recess corresponding to the retaining ball is provided on the connecting shaft. A locking spring is provided between the switch shift lever and the retaining ball.

4. The manual wheelchair braking system according to claim 1, which allows for single-person ramp braking and stops and starts on inclines, is characterized in that... The manual wheelchair also includes a handle, and the switch shift lever and the parking handle are located below the handle.

5. A manual wheelchair braking system according to claim 1, characterized in that, it allows for single-person ramp braking and easy stopping and starting on inclines. It also includes an extension rod, which is disposed between the pipe clamp and the support member.

6. A manual wheelchair braking system according to claim 5, capable of single-person ramp braking and stopping and starting on inclines, characterized in that, The pipe clamp includes a first hole for connecting to the extension rod and a second hole for connecting to the circular pipe. The inner peripheral walls of both the first hole and the second hole are provided with friction grooves.

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