Wheelchair with wheelchair brake structure

Abstract

This utility model relates to the field of wheelchair technology, providing a wheelchair with a braking structure, including a wheelchair frame, rear wheels, front wheels, and a pull rod. Rear wheels are located at the rear ends of both sides of the wheelchair frame, drive components are located on both sides inside the wheelchair frame, and front wheels are located at the front ends of both sides of the wheelchair frame. Push wheels are located between the rear wheels and the front wheels, with quick-release components inside the push wheels and a braking component on the inner side of the push wheels. This utility model employs a synchronous belt drive, which features accurate transmission and a constant transmission ratio, ensuring stable and slip-free power transmission between gears. Simultaneously, the synchronous belt drive eliminates the need for frequent lubrication, avoiding oil contamination and significantly reducing noise during operation. This not only improves the stability of the wheelchair but also creates a quiet and comfortable riding environment for the user, making it particularly suitable for use in noise-sensitive places such as hospitals and libraries.

Description

Technical Field

[0001] This utility model relates to the field of wheelchair technology, and in particular to a wheelchair with a wheelchair braking structure. Background Technology

[0002] Wheelchairs, as important assistive mobility tools, are widely used in various scenarios such as medical rehabilitation and daily life, providing convenience for people with mobility impairments. However, traditional wheelchairs have many shortcomings in structural design and functional implementation. In terms of the transmission system, most traditional wheelchairs use chain drives. Over long-term use, chains are prone to loosening and wear, leading to unstable transmission and even chain jamming, affecting the normal use of the wheelchair. Furthermore, chain drives require regular lubrication and maintenance, increasing maintenance costs and time, and easily causing oil stains, which inconveniences users. In addition, the noise generated by the chain during operation can be quite loud, disturbing others in noise-sensitive environments such as hospitals and libraries, thus affecting the user experience. In terms of armrest design, traditional armrests are usually fixed in place. This fixed structure makes it difficult to quickly replace the armrests when they are damaged, and cleaning is also more difficult. At the same time, due to the lack of flexibility, the fixed armrests will become an obstacle and increase the difficulty of operation during wheelchair transfers, getting in and out of vehicles, etc.; and it cannot meet the personalized needs of different users for using armrests in different scenarios. Utility Model Content

[0003] The purpose of this invention is to provide a wheelchair with a wheelchair braking structure, which solves the above-mentioned problems by using this device.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a wheelchair with a wheelchair braking structure, including a wheelchair frame, rear wheels, front wheels and a pull rod. The rear wheels are provided at the rear ends of both sides of the wheelchair frame, and drive components are provided on both sides inside the wheelchair frame. The front wheels are provided at the front ends of both sides of the wheelchair frame. A push wheel is provided between the rear wheels and the front wheels. A quick-release component is provided inside the push wheel, and a brake component is provided on the inner side of the push wheel.

[0005] Preferably, the drive assembly includes a gear one disposed on both sides inside the wheelchair frame, the gear one being located at the middle position on the rear wheel side, and the shaft on one side of the gear one being fixedly connected to the shaft on the rear wheel side; a gear two being disposed at the middle position on both sides inside the wheelchair frame, the gear two being located at the middle position on the push wheel side; and a timing belt being disposed on the outside of the gear one and the gear two.

[0006] Preferably, the quick-release assembly includes a support block rotatably positioned at the middle of both sides of the wheelchair frame. One side of the support block is fixedly connected to the shaft on one side of the gear, and the other side of the support block protrudes from the outer wall of the wheelchair frame. A screw hole is provided inside the support block, and a through groove is provided inside the push wheel. A fixing block is provided in the through groove, and one end of the fixing block can be screwed into the screw hole.

[0007] Preferably, the support block protruding from the outer wall of the wheelchair frame is rectangular, the inside of the through groove is rectangular, the size of the through groove matches the size of the support block, and the push wheel can be fitted onto the outside of the support block through the through groove.

[0008] Preferably, the braking assembly includes a pull rod located on one side of the rear wheel. The pull rod has an L-shaped design, and a connecting hole is provided at the bend of the pull rod. The pull rod is rotatably mounted on both sides of the wheelchair frame through the connecting hole and the axle pin. A handle is fixed to one end of the pull rod, and a connecting plate is provided at the bottom of the pull rod. The connecting plate is fixed to the outer wall of the wheelchair frame.

[0009] Preferably, a second connecting block is rotatably provided on the side wall of the connecting plate, and a brake lever is provided on one side of the second connecting block. The brake lever is rotatably provided on the side wall of the connecting plate and located on one side of the rear wheel. A first connecting block is provided between the second connecting block and the connecting hole. One side of the first connecting block is connected to the bottom of the connecting hole, and the other side of the first connecting block is connected to the top of the second connecting block. A push rod is connected to one side of the second connecting block, and one end of the push rod is connected to the middle position of the brake lever.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model provides a wheelchair with a braking structure. Traditional wheelchairs use chain drive, which is prone to problems such as chain loosening, wear, and jamming, and also produces considerable noise during operation. This wheelchair, however, uses synchronous belt drive. Synchronous belts are characterized by accurate transmission and a constant transmission ratio, ensuring stable and slip-free power transmission between gears one and two. Furthermore, synchronous belt drive requires no frequent lubrication, avoiding oil contamination, and significantly reduces noise during operation. This not only improves the stability of the wheelchair but also creates a quiet and comfortable riding environment for the user, making it particularly suitable for use in noise-sensitive places such as hospitals and libraries.

[0011] 2. This utility model provides a wheelchair with a braking structure. The armrests have been changed from a fixed design to a quick-release structure. When the armrests are damaged or need cleaning, users can quickly disassemble and install them without the need for professional tools, facilitating daily maintenance and replacement. These designs effectively reduce the overall maintenance cost of the wheelchair, improve usage efficiency, and extend the wheelchair's lifespan. The quick-release armrest design gives the wheelchair greater flexibility. Users can disassemble or install the armrests at any time according to their needs and usage scenarios. For example, when transferring the wheelchair or getting in and out of the vehicle, the armrests can be quickly removed to reduce obstruction and improve operational convenience; while during daily riding, installing the armrests provides users with a stable grip point, enhancing riding safety and comfort. This flexible design fully considers the personalized needs of different users, further improving the practicality of the wheelchair and the user experience.

[0012] 3. This utility model provides a wheelchair with a braking structure, which, combined with a lever-link combination for efficient braking, achieves a comprehensive upgrade in braking performance, ease of operation, and structural rationality. During braking, the lever principle amplifies hand force, achieving rapid and stable braking. The synchronous belt and quick-release armrests further optimize the wheelchair's transmission performance and flexibility. Whether for daily driving on flat roads, parking on slopes, or meeting the diverse needs of users with different physical conditions, this wheelchair can satisfy all needs, providing a safer, more comfortable, and reliable travel solution for users with mobility impairments. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a front view structural diagram of the present utility model; Figure 3 This is a partial structural exploded view of the present invention; Figure 4 For the present utility model Figure 3 Enlarged structural diagram at point A in the middle; Figure 5 This is a partial front view schematic diagram of the structure of this utility model; Figure 6 This is a partial structural diagram of the present invention. Figure 1 ; Figure 7 This is a partial structural diagram of the present invention. Figure 2 .

[0014] The following are the annotations in the diagram: 1. Wheelchair frame; 2. Push wheel; 21. Through groove; 22. Fixing block; 23. Support block; 24. Screw hole; 3. Rear wheel; 31. Gear 1; 32. Gear 2; 33. Timing belt; 4. Front wheel; 5. Pull rod; 51. Handle; 52. Connecting hole; 53. Connecting plate; 54. Connecting block 1; 55. Connecting block 2; 56. Push rod; 57. Brake lever. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0017] Combination Figures 1 to 7 As shown, a wheelchair with a wheelchair braking structure according to the present invention includes a wheelchair frame 1, rear wheels 3, front wheels 4 and a pull rod 5. The rear wheels 3 are provided at the rear ends of both sides of the wheelchair frame 1. Drive components are provided on both sides inside the wheelchair frame 1. Front wheels 4 are provided at the front ends of both sides of the wheelchair frame 1. Push wheels 2 are provided between the rear wheels 3 and the front wheels 4. Quick release components are provided inside the push wheels 2. Braking components are provided on the inner side of the push wheels 2.

[0018] The drive assembly includes a gear 31 located on both sides inside the wheelchair frame 1. The gear 31 is located in the middle of one side of the rear wheel 3, and the shaft on one side of the gear 31 is fixedly connected to the shaft on one side of the rear wheel 3. A gear 32 is located in the middle of one side of the wheelchair frame 1. The gear 32 is located in the middle of one side of the push wheel 2. A timing belt 33 is provided outside the gear 31 and the gear 32.

[0019] The quick-release assembly includes a support block 23 rotatably positioned at the middle of both sides of the wheelchair frame 1. One side of the support block 23 is fixedly connected to the shaft on one side of the gear 2 32. The other side of the support block 23 protrudes from the outer side wall of the wheelchair frame 1. A screw hole 24 is provided inside the support block 23. A through groove 21 is provided inside the push wheel 2. A fixing block 22 is provided in the through groove 21. One end of the fixing block 22 can be screwed into the screw hole 24.

[0020] The support block 23 protruding from the outer wall of the wheelchair frame 1 is rectangular, and the inside of the through groove 21 is rectangular. The size of the through groove 21 matches the size of the support block 23, and the push wheel 2 can be fitted onto the outside of the support block 23 through the through groove 21.

[0021] The braking assembly includes a lever 5 located on one side of the rear wheel 3. The lever 5 has an L-shaped design and a connecting hole 52 is provided at the bend of the lever 5. The lever 5 is rotatably mounted on both sides of the wheelchair frame 1 through the connecting hole 52 and the axle pin. A handle 51 is fixed to one end of the lever 5, and a connecting plate 53 is provided at the bottom of the lever 5. The connecting plate 53 is fixed to the outer wall of the wheelchair frame 1.

[0022] A second connecting block 55 is rotatably mounted on the side wall of the connecting plate 53. A brake lever 57 is mounted on one side of the second connecting block 55. The brake lever 57 is rotatably mounted on the side wall of the connecting plate 53 and located on one side of the rear wheel 3. A first connecting block 54 is provided between the second connecting block 55 and the connecting hole 52. One side of the first connecting block 54 is connected to the bottom of the connecting hole 52, and the other side of the first connecting block 54 is connected to the top of the second connecting block 55. A push rod 56 is connected to one side of the second connecting block 55, and one end of the push rod 56 is connected to the middle position of the brake lever 57.

[0023] Working principle: First, align the through groove 21 inside the push roller 2 with the outer contour of the support block 23, and smoothly insert it along the axial direction to ensure a tight fit and initial positioning. Next, slowly insert the fixing block 22 along the guide groove of the through groove 21. After the threaded end of the fixing block 22 is aligned with the threaded hole 24, use an adapter to tighten the fixing block 22. Utilize the fastening characteristics of the threaded pair to fix the push roller 2 onto the support block 23, thus completing the installation of the push roller 2. During disassembly, the installation operation is performed in reverse order. Using a special tool, rotate the fixing block 22 counterclockwise to completely unscrew it from the screw hole 24, and then remove the fixing block 22 from the through groove 21. Finally, smoothly pull the push wheel 2 out along the axial direction of the support block 23, completely separating the through groove 21 inside the push wheel 2 from the support block 23, thus easily removing the push wheel 2. Repeating the above installation and disassembly process allows for quick replacement of the push wheel 2. This design fully considers the convenience of equipment maintenance; no complex tools or professional skills are required, and ordinary users can easily complete the operation, effectively reducing subsequent maintenance costs and time costs.

[0024] Furthermore, During wheelchair use, the user rotates the push wheel 2 by applying force with both hands. The push wheel 2 transmits torque to the connected support block 23, causing the support block 23 to rotate synchronously. The rotation of the support block 23 drives the second gear 32 to rotate through the transmission mechanism. The second gear 32 then uses the elastic transmission characteristics of the synchronous belt 33 to efficiently transmit power to the first gear 31. The first gear 31 is coaxially mounted with the rear wheel 3, thereby driving the rear wheel 3 to rotate. The rear wheel 3 acts as the drive wheel, providing forward or backward power to the wheelchair, thus enabling the wheelchair to move. This multi-stage transmission design, through reasonable distribution of the transmission ratio, effectively reduces the user's operating force while ensuring driving torque, improving the wheelchair's handling comfort and flexibility.

[0025] Braking and releasing the brake: (a) Braking operation: When braking the wheelchair is required, the user grips handle 51 and applies downward pressure vertically to push lever 5. Lever 5 rotates around connecting hole 52, amplifying the force applied by the hand through leverage. The bottom of lever 5 is connected to the top of connecting block 2 55 via connecting block 1 54. As lever 5 rotates, connecting block 2 55 rotates synchronously. As connecting block 2 55 rotates, one side gradually moves downward and pushes push rod 56, which then transmits the thrust to brake lever 57, causing the bottom of brake lever 57 to press against the side wall of rear wheel 3 with a certain pressure. By increasing the friction of rear wheel 3 rotation, braking of rear wheel 3 is achieved, thus completing the braking operation of the wheelchair. This braking structure uses a lever-linkage combination transmission, which is labor-saving and has a significant braking effect, enabling the wheelchair to stop smoothly in a short time, effectively ensuring user safety.

[0026] (ii) Release the brake When the brake is released, pull handle 51 upwards, causing lever 5 to rotate in the opposite direction, which in turn resets connecting block 2 55. The reset of connecting block 2 55 pulls push rod 56, causing brake lever 57 to gradually move away from rear wheel 3, releasing the brake on rear wheel 3 and restoring the wheelchair's ability to move freely. This bidirectional controllable braking design is simple and intuitive to operate, allowing users to quickly switch between braking and driving states according to actual needs, greatly improving the convenience and safety of wheelchair use.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wheelchair with a wheelchair braking structure, comprising a wheelchair frame (1), rear wheels (3), front wheels (4), and a pull rod (5), characterized in that: The rear ends of both sides of the wheelchair frame (1) are provided with rear wheels (3), the two sides inside the wheelchair frame (1) are provided with drive components, the front ends of both sides of the wheelchair frame (1) are provided with front wheels (4), a push wheel (2) is provided between the rear wheels (3) and the front wheels (4), a quick release component is provided inside the push wheel (2), and a brake component is provided on the inner side of the push wheel (2). The drive assembly includes a gear 1 (31) disposed on both sides inside the wheelchair frame (1). The gear 1 (31) is located in the middle position on one side of the rear wheel (3), and the shaft on one side of the gear 1 (31) is fixedly connected to the shaft on one side of the rear wheel (3). A gear 2 (32) is disposed in the middle position on both sides inside the wheelchair frame (1). The gear 2 (32) is located in the middle position on one side of the push wheel (2). A timing belt (33) is disposed outside the gear 1 (31) and the gear 2 (32). The quick-release assembly includes a support block (23) rotatably positioned at the middle of both sides of the wheelchair frame (1). One side of the support block (23) is fixedly connected to the shaft on one side of the gear (32). The other side of the support block (23) protrudes from the outer wall of the wheelchair frame (1). A screw hole (24) is provided inside the support block (23). A through groove (21) is provided inside the push wheel (2). A fixing block (22) is provided in the through groove (21). One end of the fixing block (22) can be screwed into the screw hole (24). The braking assembly includes a pull rod (5) located on one side of the rear wheel (3). The pull rod (5) is L-shaped and has a connecting hole (52) at the bend. The pull rod (5) is rotatably mounted on both sides of the wheelchair frame (1) through the connecting hole (52) and the axle pin. One end of the pull rod (5) is fixed with a handle (51), and the bottom of the pull rod (5) is provided with a connecting plate (53). The connecting plate (53) is fixed to the outer wall of the wheelchair frame (1).

2. The wheelchair with a wheelchair braking structure according to claim 1, characterized in that: The support block (23) protruding from the outer wall of the wheelchair frame (1) is rectangular, the inside of the through groove (21) is rectangular, the size of the through groove (21) matches the size of the support block (23), and the push wheel (2) can be fitted onto the outside of the support block (23) through the through groove (21).

3. A wheelchair with a wheelchair braking structure according to claim 1, characterized in that: A second connecting block (55) is rotatably provided on the side wall of the connecting plate (53). A brake lever (57) is provided on one side of the second connecting block (55). The brake lever (57) is rotatably provided on the side wall of the connecting plate (53) and located on one side of the rear wheel (3). A first connecting block (54) is provided between the second connecting block (55) and the connecting hole (52). One side of the first connecting block (54) is connected to the bottom of the connecting hole (52), and the other side of the first connecting block (54) is connected to the top of the second connecting block (55). A push rod (56) is connected to one side of the second connecting block (55), and one end of the push rod (56) is connected to the middle position of the brake lever (57).

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