Brake mechanism of manual wheelchair

Abstract

The utility model relates to the field of wheelchair brake, in particular to a manual wheelchair brake mechanism which comprises a wheelchair body, a hand wheel connected with the wheelchair body, a brake frame arranged on one side of the hand wheel, a brake pad arranged inside the brake frame, a plurality of groove-shaped limiting pads arranged inside the brake pad, and friction pads symmetrically arranged on the two side faces inside the brake pad. A plurality of positioning plates are arranged at the top end and the bottom end of the brake frame, bolt holes are symmetrically formed in the positioning plates, a plurality of positioning rods are arranged at the bottom ends of the positioning plates, one side face of the outer portion of the brake frame is connected with an electric push rod, and a sleeve is arranged outside the electric push rod. The problems that a brake structure requires a user to have large operation force and is difficult for a user with weak force, meanwhile, the brake mechanism achieves braking through multi-stage transmission, certain response delay exists, and a brake block is not convenient to replace after being abraded are solved.

Description

Technical Field

[0001] This utility model relates to the field of wheelchair brakes, specifically a manual wheelchair brake mechanism. Background Technology

[0002] Wheelchairs are an important tool for rehabilitation. They are not only a means of transportation for people with physical disabilities and limited mobility, but more importantly, they enable them to exercise and participate in social activities. A typical wheelchair consists of four parts: a frame, wheels, brakes, and a seat. A hand-cranked wheelchair adds a hand crank to the basic wheelchair design.

[0003] Furthermore, the application document with announcement number CN212090004U mentions a manual wheelchair. This manual wheelchair allows the user to pull out a lever after prolonged sitting, then extend a telescopic push rod, rotating it until it is parallel to the seat cushion. This provides convenience and comfort, allowing the user to lie down and rest when tired. In case of going downhill or in an emergency, the handle can be pushed, which in turn drives a transmission block, which in turn drives a brake block. The brake block firmly holds the pivot, allowing the user to brake automatically in an emergency, ensuring user safety. However, this design still has certain drawbacks that need optimization. Specifically, the braking structure requires significant force from the user, which is difficult for users with weaker strength. Additionally, the braking mechanism uses multi-stage transmission, resulting in a certain response delay, and the brake blocks are difficult to replace after wear.

[0004] Therefore, it is particularly important to design a manual wheelchair braking mechanism to overcome the above-mentioned technical defects and improve overall practicality. Summary of the Invention

[0005] The purpose of this invention is to provide a manual wheelchair braking mechanism to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A manual wheelchair braking mechanism includes a wheelchair body connected to a handwheel. A brake frame is provided on one side of the handwheel. A brake pad is provided inside the brake frame. A plurality of grooved limiting pads are provided inside the brake pad. Friction pads are symmetrically provided on both sides of the inside of the brake pad. A plurality of positioning plates are provided at the top and bottom of the brake frame. Bolt holes are symmetrically provided on the positioning plates. A plurality of positioning rods are provided at the bottom of the positioning plates. An electric push rod is connected to one side of the outer side of the brake frame. A sleeve is provided on the outer side of the electric push rod.

[0008] As a preferred embodiment of this utility model, the wheelchair body is provided with a control button, which is linearly connected to the electric push rod via a cable, and the cable is disposed inside the sleeve and the wheelchair body.

[0009] As a preferred embodiment of this utility model, the electric push rod is disposed inside the sleeve, and the sleeve is fixedly connected to the wheelchair body.

[0010] As a preferred embodiment of this utility model, the brake frame is U-shaped, and the brake pads are fitted to the brake frame.

[0011] As a preferred embodiment of this utility model, the outer surface of the handwheel is provided with a protruding block for matching the grooved limiting pad, the grooved limiting pad is a rubber pad, and the friction pad is made of resin.

[0012] As a preferred embodiment of this utility model, the brake pad is provided with a plurality of positioning holes for matching the positioning rod, and the brake frame and the positioning plate are fixed in position by bolts.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention provides a manual wheelchair braking mechanism that utilizes a structure consisting of a grooved limiting pad, a friction pad, a positioning plate, bolt holes, a positioning rod, and a sleeve. An electric push rod pushes the brake pads closer to the handwheel. Through the continuous advancement of the electric push rod and the auxiliary limiting effect of the friction pad, the grooved limiting pad and the convex block completely fit and lock together, restricting the displacement of the handwheel. After the brake pads wear out, the bolts can be removed for replacement. This solves the problems of the previous braking structure requiring significant operational force, which was difficult for users with weaker strength, and the braking mechanism using multi-stage transmission, resulting in a certain response delay and inconvenience in replacing worn brake pads. Attached Figure Description

[0015] Figure 1 This is a structural diagram of the entire utility model;

[0016] Figure 2 This is an enlarged schematic diagram of point A in this utility model;

[0017] Figure 3 This is a schematic diagram of the brake bracket of this utility model.

[0018] In the diagram: 1. Wheelchair body; 101. Handwheel; 2. Brake frame; 201. Brake pad; 202. Groove-shaped limiting pad; 203. Friction pad; 204. Positioning plate; 205. Bolt hole; 206. Positioning rod; 207. Electric push rod; 208. Sleeve. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0020] To facilitate understanding of this utility model, a more comprehensive description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are provided. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0021] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] For examples, see Figure 1-3 This utility model provides a technical solution:

[0024] A manual wheelchair braking mechanism includes a wheelchair body 1 connected to a handwheel 101. A brake frame 2 is provided on one side of the handwheel 101. A brake pad 201 is provided inside the brake frame 2. Several grooved limiting pads 202 are provided inside the brake pad 201. Friction pads 203 are symmetrically provided on both sides inside the brake pad 201. Several positioning plates 204 are provided at the top and bottom of the brake frame 2. Bolt holes 205 are symmetrically provided on the positioning plates 204. Several positioning rods 206 are provided at the bottom of the positioning plates 204. An electric push rod 207 is connected to one side of the brake frame 2. A sleeve 208 is provided on the outside of the electric push rod 207. When the user sits on the wheelchair body 1, he pushes the wheelchair forward or turns by turning the handwheel 101. When braking is needed, the user presses a control button on the wheelchair body 1. The control button sends a signal to the electric push rod 207 through a cable. The cable is cleverly hidden in the sleeve 208 and the wheelchair. Inside the main body 1, both aesthetics and safety are maintained. Upon receiving a signal, the electric push rod 207 responds quickly under the protection of the sleeve 208, pushing the brake frame 2 to move towards the handwheel 101. As the brake frame 2 moves, the grooved limiting pad 202 inside the brake pad 201 comes into close contact with the protruding block on the outer surface of the handwheel 101. At the same time, the resin friction pads 203 on both sides inside the brake pad 201 also begin to contact the handwheel 101, generating sufficient friction to quickly slow down or stop the movement of the wheelchair. The brake pad 201 fits tightly with the positioning rod 206 on the brake frame 2 through its positioning hole and is fixed in position by bolts on the positioning plate 204, facilitating installation and disassembly. The entire braking process is fast, smooth, and safe. When braking is no longer needed, the user presses the control button again, and the electric push rod 207 moves in the opposite direction, releasing the brake pad 201 and allowing the handwheel 101 to return to a free-rotating state.

[0025] The wheelchair body 1 is equipped with a control button, which is linearly connected to the electric push rod 207 via a cable. The cable is located inside the sleeve 208 and the wheelchair body 1. The control button controls the opening and closing of the electric push rod 207. The electric push rod 207 is located inside the sleeve 208, and the sleeve 208 is fixedly connected to the wheelchair body 1. The sleeve 208 protects the electric push rod. The brake frame 2 is U-shaped, and the brake pad 201 is fitted to the brake frame 2 for easy installation. The outer surface of the handwheel 101 has a protruding block for matching the grooved limiting pad 202. The grooved limiting pad 202 is a rubber pad, and the friction pad 203 is made of resin to facilitate the rotation of the handwheel. The brake pad 201 has several positioning holes for matching the positioning rod 206. The brake frame 2 and the positioning plate 204 are fixed in position by bolts to facilitate the installation of the brake frame 2 and the brake pad 201.

[0026] The working process of this utility model is as follows: When using this type of manual wheelchair braking mechanism, the user first sits on the wheelchair body 1 and pushes the wheelchair forward or steers by turning the handwheel 101. When braking is needed, the user presses the control button on the wheelchair body 1. The control button sends a signal to the electric push rod 207 via a cable. This cable is cleverly hidden inside the sleeve 208 and the wheelchair body 1, maintaining both aesthetics and safety. Upon receiving the signal, the electric push rod 207 responds quickly under the protection of the sleeve 208, pushing the brake frame 2 to move towards the handwheel 101. As the brake frame 2 moves, the grooved limiting pad 2 inside the brake pad 201... 02 makes close contact with the protruding block on the outer surface of the handwheel 101. At the same time, the resin friction pads 203 on both sides inside the brake pad 201 also begin to contact the handwheel 101, generating sufficient friction to quickly slow down or stop the movement of the wheelchair. The brake pad 201 is tightly engaged with the positioning rod 206 on the brake frame 2 through the positioning hole on it, and is fixed in position by the bolts on the positioning plate 204, which facilitates installation and disassembly. The entire braking process is fast, smooth and safe. When the brake is no longer needed, the user presses the control button again, the electric push rod 207 moves in the opposite direction, releases the brake pad 201, and allows the handwheel 101 to return to a free rotation state.

[0027] All standard parts used in this application can be purchased from the market. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The control method is through control buttons. The control circuit of the control buttons can be realized by a person skilled in the art through simple circuit connection. It is common knowledge in the field. Furthermore, the main focus of this application is on the braking mechanism. Therefore, this application will not explain the structure and connection of the wheelchair and handwheel in detail.

[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 manual wheelchair braking mechanism, comprising a wheelchair body (1), characterized in that: The wheelchair body (1) is connected to a handwheel (101). A brake frame (2) is provided on one side of the handwheel (101). A brake pad (201) is provided inside the brake frame (2). Several grooved limiting pads (202) are provided inside the brake pad (201). Friction pads (203) are symmetrically provided on both sides inside the brake pad (201). Several positioning plates (204) are provided at the top and bottom of the brake frame (2). Bolt holes (205) are symmetrically provided on the positioning plates (204). Several positioning rods (206) are provided at the bottom of the positioning plates (204). An electric push rod (207) is connected to one side of the outer side of the brake frame (2). A sleeve (208) is provided on the outer side of the electric push rod (207).

2. The manual wheelchair braking mechanism according to claim 1, characterized in that: The wheelchair body (1) is provided with a control button, which is linearly connected to the electric push rod (207) via a cable. The cable is located inside the sleeve (208) and the wheelchair body (1).

3. The manual wheelchair braking mechanism according to claim 1, characterized in that: The electric push rod (207) is disposed inside the sleeve (208), and the sleeve (208) is fixedly connected to the wheelchair body (1).

4. A manual wheelchair braking mechanism according to claim 1, characterized in that: The brake frame (2) is U-shaped, and the brake pad (201) is fitted to the brake frame (2).

5. A manual wheelchair braking mechanism according to claim 1, characterized in that: The outer surface of the handwheel (101) is provided with a protruding block for matching the grooved limiting pad (202). The grooved limiting pad (202) is a rubber pad, and the friction pad (203) is made of resin.

6. A manual wheelchair braking mechanism according to claim 1, characterized in that: The brake pad (201) is provided with a number of positioning holes for matching the positioning rod (206), and the brake frame (2) and the positioning plate (204) are fixed in position by bolts.

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