A front and rear brake device for a wheelchair wheel

Abstract

The present invention discloses a front and rear braking device for a wheelchair wheel, which includes a central shaft and a wheel. A fixed seat is fixedly provided on the central shaft. A first connecting rod and a second connecting rod are rotatably provided on the fixed seat. A brake rod equipped with a braking component is hinged on the first connecting rod and the second connecting rod. A limiting column is fixedly provided on the fixed seat. A front foot pedal rod is hinged on the limiting column. The first connecting rod can abut against one side of the limiting column close to the second connecting rod. A rear foot pedal rod with one end hinged to the front foot pedal rod is hinged on the second connecting rod. Braking pedals are provided on both the front foot pedal rod and the rear foot pedal rod. An elastic member is telescopically provided between the fixed seat and the second connecting rod. A first limiting block and a second limiting block are fixedly provided on the fixed seat in sequence from bottom to top between the first connecting rod and the second connecting rod. One end of the front foot pedal rod hinged to the rear foot pedal rod can abut against the first limiting block and the second limiting block. The present invention can perform foot braking from both sides of the wheel, with more convenient operation and improved operation experience for caregivers.

Description

Technical Field

[0001] The present invention relates to the technical field of wheelchair braking, and in particular, to a front and rear brake device for wheelchair wheels. Background Art

[0002] For groups of people with inconvenient leg movement who need to rely on wheelchairs to move and live independently, they usually need caregivers to take care of their daily life. In order to facilitate the above-mentioned groups to get on and off the wheelchair, the wheelchair needs to be temporarily braked. Currently, a brake switch is equipped on the wheels of the wheelchair, and a brake pedal is connected to the brake switch. When the caregiver steps on the brake pedal, the brake pads connected to the brake pedal will abut against the wheels, thereby locking the wheels. Nowadays, the brake pedal on the wheelchair wheel is only provided at the rear side of the wheel, and the caregiver needs to walk to the rear of the wheel to perform the foot brake operation, which is very inconvenient to use and greatly reduces the operation experience of the caregiver. Summary of the Invention

[0003] The technical problem to be solved by the present invention is that for the wheelchair wheel brake device in the prior art, the caregiver can only perform the foot brake from the rear of the wheel, which is inconvenient to operate. Based on this, the present invention provides a front and rear brake device for wheelchair wheels that can be operated by the caregiver.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a front and rear brake device for wheelchair wheels, including a central shaft and a wheel rotatably arranged on the central shaft. A fixed seat is fixedly arranged on the central shaft, and a first connecting rod and a second connecting rod are rotatably arranged on the fixed seat. A brake rod equipped with a brake component is hinged on the first connecting rod and the second connecting rod. A limiting column is fixedly arranged on the fixed seat, and a front foot pedal rod is hinged on the limiting column. The first connecting rod can abut against the side of the limiting column close to the second connecting rod. A rear foot pedal rod is hinged on the second connecting rod, and one end of the rear foot pedal rod is hinged to the front foot pedal rod. Brake pedals are arranged on both the front foot pedal rod and the rear foot pedal rod. An elastic member is telescopically arranged between the fixed seat and the second connecting rod. A first limiting block and a second limiting block are fixedly arranged on the fixed seat between the first connecting rod and the second connecting rod in sequence from bottom to top. The end of the front foot pedal rod hinged to the rear foot pedal rod can abut against the first limiting block and the second limiting block.

[0005] Further, the rear foot pedal rod and the middle part of the second connecting rod are hinged through a third hinge shaft, and one end of the front foot pedal rod and one end of the rear foot pedal rod are hinged through a fourth hinge shaft. The brake device has an unlocking state and a locking state. In the unlocking state, the fourth hinge shaft is located below the connection line between the limiting column and the third hinge shaft. In the locking state, the fourth hinge shaft is located above the connection line between the limiting column and the third hinge shaft.

[0006] Further, the first limiting block is located below the first hinge column, and the second limiting block is located above the first hinge column.

[0007] Furthermore, one end of the elastic member is fixedly connected to the fixed seat, and the other end of the elastic member is connected to the free end of the second connecting rod.

[0008] Furthermore, the front footrest rod is rotatably sleeved on the limit post, and one end of the front footrest rod is hinged to one end of the rear footrest rod through a fourth hinge shaft.

[0009] Furthermore, the distance between the limit post on the front footrest rod and the brake pedal is greater than the distance between the limit post and the fourth hinge shaft, and the distance between the third hinge shaft on the rear footrest rod and the brake pedal is greater than the distance between the third hinge shaft and the fourth hinge shaft.

[0010] Furthermore, a first hinge post and a second hinge post are respectively and fixedly connected to the fixed seat, the lower end of the first connecting rod is rotatably sleeved on the first hinge post, and the lower end of the second connecting rod is rotatably sleeved on the second hinge post.

[0011] Furthermore, the upper end of the first connecting rod is hinged to the brake lever through a first hinge shaft, and the upper end of the second connecting rod is hinged to the brake lever through a second hinge shaft.

[0012] Furthermore, the elastic member is a spring.

[0013] The beneficial effects of the present invention are as follows: for the front and rear brake device of the wheelchair wheels of the present invention, the front footrest rod and the rear footrest rod can perform linkage activities. The caregiver can lock the wheels by stepping on any one of the brake pedals on the front footrest rod and the rear footrest rod. Compared with the prior art, the caregiver does not need to move to the rear of the wheels to perform the braking operation, which helps the caregiver to operate quickly, and has high use reliability, greatly improving the operation experience of the caregiver. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below with reference to the drawings and embodiments.

[0015] Figure 1 is a partial exploded view (omitting the wheels) of the front and rear brake device of the wheelchair wheels of the present invention;

[0016] Figure 2 is a schematic structural diagram of the front and rear brake device of the wheelchair wheels of the present invention in the unlocked state;

[0017] Figure 3 is a schematic structural diagram of the front and rear brake device of the wheelchair wheels of the present invention in the locked state.

[0018] In the figure: 1. Central axis, 2. Wheel, 3. Fixed seat, 31. Limit post, 301. First hinge post, 302. Second hinge post, 303. First hinge shaft, 304. Second hinge shaft, 305. Third hinge shaft, 306. Fourth hinge shaft, 32. Connecting post, 4. First connecting rod, 5. Second connecting rod, 51. Hook, 6. Brake lever, 7. Front footrest lever, 8. Rear footrest lever, 9. Brake pedal, 10. Elastic member, 11. First limit block, 12. Second limit block. Detailed implementation manner

[0019] Now, the present invention will be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the present invention in a schematic manner, so it only shows the components related to the present invention.

[0020] Please refer to Figures 1-3 , the present invention provides a front and rear brake device for a wheelchair wheel, including a central axis 1, the central axis 1 is fixedly installed on the frame of the wheelchair, a wheel 2 is rotatably installed on the central axis 1, a fixed seat 3 is fixedly connected to the end of the central axis 1, a first connecting rod 4 and a second connecting rod 5 are rotatably installed on the fixed seat 3, a brake lever 6 is hinged on the first connecting rod 4 and the second connecting rod 5, a brake component (not shown in the figure) is fixedly connected to the end of the brake lever 6, when the brake component presses on the wheel 2, the wheel 2 can be locked, and the brake component can be a brake pad or a brake rod. A limit post 31 is fixedly connected to the fixed seat 3, a front footrest lever 7 is hinged on the limit post 31, the first connecting rod 4 can abut against one side of the limit post 31 close to the second connecting rod 5, a rear footrest lever 8 is hinged on the second connecting rod 5, one end of the front footrest lever 7 and one end of the rear footrest lever 8 are hinged to each other, and brake pedals 9 for a caregiver to step on are installed at the other ends of the front footrest lever 7 and the rear footrest lever 8 respectively. An elastic member 10 is telescopically arranged between the fixed seat 3 and the second connecting rod 5, a first limit block 11 and a second limit block 12 are fixedly connected to the fixed seat 3 in sequence from bottom to top between the first connecting rod 4 and the second connecting rod 5, and the end of the front footrest lever 7 hinged to the rear footrest lever 8 can abut against the first limit block 11 and the second limit block 12.

[0021] As a preferred embodiment, a first hinge post 301 and a second hinge post 302 are respectively fixedly connected to the fixed seat 3, the first hinge post 301 and the second hinge post 302 are on the same horizontal line, the lower end of the first connecting rod 4 is rotatably sleeved on the first hinge post 301, and the lower end of the second connecting rod 5 is rotatably sleeved on the second hinge post 302. The upper end of the first connecting rod 4 and the brake lever 6 are hinged through a first hinge shaft 303, and the upper end of the second connecting rod 5 and the brake lever 6 are hinged through a second hinge shaft 304.

[0022] Regarding the appendix Figure 1In this regard, when the second link 5 rotates clockwise around the second hinge post 302, it will drive the first link 4 and the brake lever 6 to move simultaneously. At this time, the brake lever 6 will drive the brake component at its end to move to the right, so that the brake component presses against the wheel 2, thereby locking the wheel 2.

[0023] As a preferred embodiment, the front footrest lever 7 is rotatably sleeved on the limit post 31. The rear footrest lever 8 is hinged to the middle of the second link 5 through a third hinge shaft 305. One end of the front footrest lever 7 is hinged to one end of the rear footrest lever 8 through a fourth hinge shaft 306.

[0024] In this way, when the brake pedal 9 on the front footrest lever 7 is stepped down, the front footrest 7 rotates counterclockwise around the limit post 31, further driving the rear footrest 8 to rotate clockwise. During this process, since the third hinge shaft 305 in the middle of the second link 5 is not fixedly connected to the fixed seat 3, the second link 5 will rotate clockwise around the second hinge post 302 under the drive of the rear footrest 8, thereby driving the brake lever 6 to move to the right.

[0025] As a preferred embodiment, one end of the elastic member 10 is fixedly connected to the fixed seat 3, and the other end of the elastic member 10 is connected to the free end of the second link 5 (that is, the end of the second link 5 far from the second hinge post 302). When the elastic member 10 is in its natural state, the elastic force of the elastic member 10 acts on the second link 5, so that the second link 5 has a tendency to rotate counterclockwise. When the second link 5 rotates counterclockwise, it will drive the first link 4 to rotate counterclockwise, so that the first link 4 abuts against the limit post 31. At this time, the second link 5 will not continue to move under the action of the elastic member 10. Therefore, the brake lever 6 and the brake component thereon are locked in a specific position. At this position, the brake component is separated from the wheel 2, and the two have not contacted before, and the wheel 2 can rotate relative to the central axis 1, so that the wheelchair can move forward. When the caregiver steps on the brake pedal 9, the second link 5 rotates clockwise against the elastic force of the elastic member 10, and at this time the elastic member 10 is further stretched.

[0026] Furthermore, the elastic member 10 is a spring. A connecting post 32 is fixedly installed on the fixed seat 3. A hook 51 is fixedly provided at the end of the second link 5 far from the second hinge post 302. The ring at one end of the spring is hooked on the connecting post 32, and the ring at the other end of the spring is hooked on the hook 51, so as to facilitate the installation of the elastic member 10.

[0027] As a preferred embodiment, the distance between the upper limit post 31 on the front footrest lever 7 and the brake pedal 9 is greater than the distance between the limit post 31 and the fourth hinge shaft 306, and the distance between the third hinge shaft 305 on the rear footrest lever 8 and the brake pedal 9 is greater than the distance between the third hinge shaft 305 and the fourth hinge shaft 306, so as to make it easier for the caregiver to step on the brake pedal 9 more labor - saving.

[0028] It should be noted that no matter which brake pedal 9 on the front footrest lever 7 and the rear footrest lever 8 the caregiver steps on, it will cause the hinge ends of the front footrest lever 7 and the rear footrest lever 8 to move upward, thereby driving the second connecting rod 5 to move to stretch the elastic member 10, and then driving the brake lever 6 to move, so that the brake component presses tightly on the wheel 2, thereby locking the wheel 2. For the convenience of the applicant to clearly and briefly describe the state of the brake device of the present invention during use, it is now stipulated that when the brake component does not lock the wheel 2, the brake device of the present invention is in the unlocked state; when the brake component locks the wheel 2, the brake device of the present invention is in the locked state.

[0029] As a preferred embodiment, the first limit block 11 is located below the first hinge post 301, and the second limit block 12 is located above the first hinge post 301. When the brake device of the present invention is in the unlocked state, the ends of the front footrest lever 7 and the rear footrest lever 8 abut against the top of the first limit block 11 under the elastic force of the elastic member 10; when the brake device of the present invention is in the locked state, the ends of the front footrest lever 7 and the rear footrest lever 8 abut against the bottom of the second limit block 12. The first limit block 11 and the second limit block 12 play a limiting role on the front footrest lever 7 and the rear footrest lever 8.

[0030] The use process of the front - and - rear wheel brake device of the wheelchair of the present invention is as follows: when the brake device is in the unlocked state, the brake component on the brake lever 6 is separated from the wheel 2, and the wheelchair can travel normally. In this state, the fourth hinge shaft 306 is located between the limit post 31 and the third hinge shaft 305 on the connecting line (that is, Figure 3Below the dashed line between the middle limit post 31 and the third hinge shaft 305. When the caregiver needs to lock the wheel 2, the caregiver can step on the brake pedal 9 on either the front footrest rod 7 or the rear footrest rod 8. At this time, the front footrest rod 7 rotates counterclockwise, and at the same time, the rear footrest rod 8 rotates clockwise. The hinge joint of the front footrest rod 7 and the rear footrest rod 8 moves upward and thus disengages from the top of the first limit block 11. As the caregiver gradually steps on the brake pedal 9, the fourth hinge shaft 306 gradually moves upward. When the user continues to step on the brake pedal 9 until the fourth hinge shaft 306 crosses the connection line between the limit post 31 and the third hinge shaft 305 and abuts against the bottom of the second limit block 12, the brake lever 6 moves to the right in place, and the brake component thereon presses tightly on the wheel 2. At this time, the brake device of the present invention is in a locked state. Further, when in the locked state, the second link 5 has a tendency to rotate counterclockwise under the elastic force of the elastic member 10, which will cause the rear footrest rod 8 to have a tendency to move to the left, and further push the front footrest rod 7 to the left. However, the front footrest rod 7 is installed on the fixed seat 3 through the first hinge post 301 and it will not move to the left. Therefore, when the fourth hinge shaft 306 is above the connection line between the limit post 31 and the third hinge shaft 305, the front footrest rod 7 and the rear footrest rod 8 will not easily reset. Thus, the brake device in the locked state has a self-locking function and high reliability. When the caregiver needs to release the lock, they need to lift the front footrest rod 7 or the rear footrest rod 8 upward.

[0031] It should be noted that when assembling each component, they all have their normal movement spaces and there will be no interference to ensure the normal linkage of each component of the brake device.

[0032] For the front and rear brake device of the wheelchair wheel of the present invention, the front footrest rod 7 and the rear footrest rod 8 can be linked. The caregiver can lock the wheel 2 by stepping on any one of the brake pedals 9 on the front footrest rod 7 and the rear footrest rod 8. Compared with the prior art, the caregiver does not need to move to the rear of the wheel 2 to perform the braking operation, which helps the caregiver to operate quickly and has high use reliability, greatly improving the operation experience of the caregiver.

[0033] Inspired by the ideal embodiments of the present invention described above, through the above description, relevant staff can make various changes and modifications without departing from the scope of the present invention. The technical scope of the present invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A front and rear braking device for a wheelchair wheel, characterized in that: It includes a central shaft (1) and a wheel (2) rotatably provided on the central shaft (1). A fixed seat (3) is fixedly provided on the central shaft (1). A first connecting rod (4) and a second connecting rod (5) are rotatably provided on the fixed seat (3). A brake lever (6) equipped with a braking component is hinged on the first connecting rod (4) and the second connecting rod (5). A limiting post (31) is fixedly provided on the fixed seat (3). A front foot pedal rod (7) is hinged on the limiting post (31). The first connecting rod (4) can abut against the side of the limiting post (31) close to the second connecting rod (5). A rear foot pedal rod (8) with one end hinged to the front foot pedal rod (7) is hinged on the second connecting rod (5). Braking pedals (9) are provided on both the front foot pedal rod (7) and the rear foot pedal rod (8). An elastic member (10) is telescopically provided between the fixed seat (3) and the second connecting rod (5). A first limiting block (11) and a second limiting block (12) are fixedly provided on the fixed seat (3) in sequence from bottom to top between the first connecting rod (4) and the second connecting rod (5). The end of the front foot pedal rod (7) hinged to the rear foot pedal rod (8) can abut against the first limiting block (11) and the second limiting block (12).

2. The front and rear brake device for a wheelchair wheel according to claim 1, wherein: The rear foot pedal rod (8) is hinged to the middle of the second connecting rod (5) through a third hinge shaft (305). One end of the front foot pedal rod (7) is hinged to one end of the rear foot pedal rod (8) through a fourth hinge shaft (306). The braking device has an unlocked state and a locked state. In the unlocked state, the fourth hinge shaft (306) is located below the connection line between the limiting post (31) and the third hinge shaft (305). In the locked state, the fourth hinge shaft (306) is located above the connection line between the limiting post (31) and the third hinge shaft (305).

3. The front and rear brake device for a wheelchair wheel according to claim 2, wherein: The first limiting block (11) is located below the first hinge post (301), and the second limiting block (12) is located above the first hinge post (301).

4. The front and rear brake device for a wheelchair wheel according to claim 1, wherein: One end of the elastic member (10) is fixedly connected to the fixed seat (3), and the other end of the elastic member (10) is connected to the free end of the second connecting rod (5).

5. The front and rear brake device for a wheelchair wheel according to claim 2, characterized in that: The front foot pedal rod (7) is rotatably sleeved on the limiting post (31), and one end of the front foot pedal rod (7) is hinged to one end of the rear foot pedal rod (8) through a fourth hinge shaft (306).

6. The front and rear brake device for a wheelchair wheel according to claim 5, characterized in that: The distance between the limiting post (31) and the braking pedal (9) on the front foot pedal rod (7) is greater than the distance between the limiting post (31) and the fourth hinge shaft (306). The distance between the third hinge shaft (305) and the braking pedal (9) on the rear foot pedal rod (8) is greater than the distance between the third hinge shaft (305) and the fourth hinge shaft (306).

7. The wheelchair wheel front and rear braking device according to claim 2, characterized in that: A first hinge post (301) and a second hinge post (302) are respectively fixedly connected to the fixed seat. The lower end of the first connecting rod (4) is rotatably sleeved on the first hinge post (301), and the lower end of the second connecting rod is rotatably sleeved on the second hinge post (302).

8. The front and rear brake device for a wheelchair wheel according to claim 7, wherein: The upper end of the first connecting rod (4) is hinged to the brake lever (6) through a first hinge shaft (303), and the upper end of the second connecting rod (5) is hinged to the brake lever (6) through a second hinge shaft (304).

9. The front and rear brake device for a wheelchair wheel according to claim 4, characterized in that: The elastic member (10) is a spring.

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