Wheelchair

Abstract

The utility model discloses a wheelchair, and particularly relates to the technical field of wheelchairs, the wheelchair comprises a hub and a tire on the hub, and further comprises a brake box and an oscillating rod hinged in the brake box, a first end of the oscillating rod is provided with a push rod in a sliding mode, and the brake rod hinged in the brake box is movably arranged on the tire. The brake rod is movably connected with the second end of the swing rod, and a locking block is arranged in the brake box in a sliding mode. According to the wheelchair, the swing rod swings to drive the brake rod to be attached to the tire for speed reduction, when the swing rod crosses the first curved surface block, the first curved surface block shields and limits the swing rod so that the brake rod can be kept in the state of being attached to the tire, and the push rod is pressed to slide relative to the swing rod so that the brake rod can be driven to rotate. And at the moment, the first curved surface block is separated from the swinging path of the swinging rod, so that the limiting of the swinging rod is relieved, and the swinging rod can swing again.

Description

TECHNICAL FIELD

[0001] The utility model relates to a wheelchair technical field, concretely relates to a wheelchair. BACKGROUND

[0002] The wheelchair is an auxiliary tool designed for people with difficulty in moving, usually composed of a seat, wheels and a frame, aiming to help users move.

[0003] According to patent announcement No. CN218899980U, the announcement date is: 2023-04-25 discloses a wheelchair, which comprises a main frame, a foot pedal connecting rod mechanism and a foot pedal; the foot pedal connecting rod mechanism comprises a telescopic support rod and a foot pedal connecting rod; the telescopic support rod is connected to the main frame in front and back sliding mode, the top of the foot pedal connecting rod is rotatably connected to the main frame, the middle part is rotatably connected to the telescopic support rod, and the bottom is connected to the foot pedal; when the telescopic support rod slides forward and backward relative to the main frame, it can drive the foot pedal connecting rod to rotate relative to the main frame.

[0004] In the prior art including the above patent, the current wheelchair will control the deceleration and stopping of the wheelchair through the brake assembly thereon when in use, and the brake assembly mostly comprises a swing rod for pushing the brake and a brake lever composed of connecting rods, which is driven by the user pushing the swing rod to cooperate with the connecting rods to scrape the wheels of the wheelchair to achieve the effect of deceleration. However, the connecting rod type brake assembly on the common wheelchair mostly cannot achieve brake locking when in use, and the user needs to push the swing rod for a long time to achieve the effect of the brake lever continuously adhering to the wheels, which leads to the decrease of the tightness of the brake lever adhering to the wheels when the user does not push the swing rod, and further leads to the decrease of the brake effect. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a wheelchair to solve the above technical problems.

[0006] In order to achieve the above purpose, the utility model provides the following technical scheme: a wheelchair, comprising a hub and a tire on the hub, further comprising a brake box and a swing rod hingedly arranged in the brake box, a push rod being slidably arranged at the first end of the swing rod, a brake lever being movably arranged on the tire and hingedly arranged in the brake box, the second end of the brake lever being movably connected with the swing rod, a locking block being slidably arranged in the brake box, the swing rod being slidably arranged on a first curved block arranged on the locking block, the push rod being slidably arranged on a second curved block arranged on the locking block, and the locking block being slidably arranged to make the first curved block deviate from the swing path of the swing rod.

[0007] Preferably, a reset spring is arranged between the swing lever and the push lever, and a locking spring is arranged between the locking block and the brake box, the second end of the swing lever is hingedly provided with a connecting rod, and the first end of the connecting rod is hingedly arranged on the brake lever.

[0008] Preferably, a friction box is fixedly arranged on the brake lever, a brake block is arranged in a cavity of the friction box, and the brake block is provided with a matching curved surface on the side of the tire.

[0009] Preferably, an arc-shaped brake rubber is fixedly arranged on the matching curved surface of the brake block.

[0010] Preferably, a contact rod is symmetrically hingedly arranged in the friction box, the first ends of the two contact rods are movably arranged on the opposite two side walls of the hub, and a torsion spring is arranged on the contact rod.

[0011] Preferably, a speed reduction block is fixedly arranged on the first end of the contact rod.

[0012] Preferably, a buffer spring is fixedly arranged on the brake block, and the second ends of the two contact rods are located on the moving path of the brake block.

[0013] Preferably, the contact rod is a stainless steel rod.

[0014] In the above technical solution, the wheelchair provided by the present application has the following beneficial effects: the swing lever swings to drive the brake lever to swing and adhere to the tire to slow down, the swing lever is pressed to extrude the first curved block, when the swing lever passes the first curved block, the first curved block limits the swing lever to keep the brake lever adhered to the tire, the push lever is pressed to slide relative to the swing lever, the push lever extrudes the second curved block to drive the locking block to slide, the first curved block is separated from the swing path of the swing lever, the swing lever is released from the limitation to swing again, and the swing lever is locked and unlocked to keep the brake lever adhered to the tire to continuously slow down or separate from the tire to stop slowing down. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the drawings needed in the embodiments will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art according to these drawings.

[0016] Figure 1 The overall structure schematic view of the embodiment of the present application is provided.

[0017] Figure 2The brake box section structure schematic diagram provided by the embodiment of the utility model;

[0018] Figure 3 The friction box section structure schematic diagram provided by the embodiment of the utility model;

[0019] Figure 4 The brake box section structure schematic diagram provided by the embodiment of the utility model;

[0020] Figure 5 The swing rod section structure schematic diagram provided by the embodiment of the utility model;

[0021] Figure 6 The A place enlarged structure schematic diagram provided by the embodiment of the utility model;

[0022] Figure 7 The B place enlarged structure schematic diagram provided by the embodiment of the utility model;

[0023] Figure 8 The C place enlarged structure schematic diagram provided by the embodiment of the utility model.

[0024] Mark explanation:

[0025] 1, hub;2, brake box;3, friction box;4, locking block;11, tire;21, opening;22, push rod;23, return spring;24, swing rod;25, connecting rod;26, brake lever;31, cavity;32, brake block;33, arc brake rubber;34, buffer spring;35, contact rod;36, speed reduction block;37, torsional spring;41, first curved surface block;42, second curved surface block;43, locking spring. Specific implementation

[0026] In order to make the technical personnel in the prior art better understand the technical scheme of the utility model, the utility model will be introduced further in detail below in conjunction with the drawings.

[0027] As Figures 1-8As shown, a wheelchair includes a hub 1 and a tire 11 on the hub 1, a brake box 2, and a swing rod 24 hinged in the brake box 2. A push rod 22 is slidably disposed at the first end of the swing rod 24. A brake rod 26 hinged in the brake box 2 is movably disposed on the tire 11, and the second ends of the brake rod 26 and the swing rod 24 are movably connected. A locking block 4 is slidably disposed in the brake box 2. The swing rod 24 is slidably disposed on a first curved surface block 41 disposed on the locking block 4. The push rod 22 is slidably disposed on a second curved surface block 42 disposed on the locking block 4. The locking block 4 slides to disengage the first curved surface block 41 from the swing path of the swing rod 24. The swing lever 24 swings in conjunction with the brake lever 26 to cause the brake lever 26 to swing and adhere to the tire 11 for deceleration. The swing lever 24 swings to press the first curved block 41. When the swing lever 24 passes the first curved block 41, the first curved block 41 blocks and limits the swing lever 24 so that the brake lever 26 remains in contact with the tire 11. By pressing the push lever 22 to slide relative to the swing lever 24, the push lever 22 presses the second curved block 42 and causes the locking block 4 to slide. At this time, the first curved block 41 is disengaged from the swing path of the swing lever 24, thereby releasing the limitation on the swing lever 24 so that the swing lever 24 can swing again. Thus, by locking and unlocking the swing lever 24, the brake lever 26 can be kept in contact with the tire 11 for continuous deceleration and disengaged from the tire 11 to stop deceleration.

[0028] Specifically, the top of the brake box 2 has an opening 21 that communicates with it, and the push rod 22 moves within the opening 21.

[0029] As a further technical solution provided by this utility model, a return spring 23 is provided between the swing rod 24 and the push rod 22, and a locking spring 43 is provided between the locking block 4 and the brake box 2. A connecting rod 25 is hinged to the second end of the swing rod 24, and the first end of the connecting rod 25 is hinged to the brake rod 26.

[0030] Specifically, such as Figure 6 As shown, the two ends of the return spring 23 are fixedly installed on the swing rod 24 and the push rod 22, respectively, and the two ends of the locking spring 43 are fixedly installed on the locking block 4 and the brake box 2, respectively. When the swing rod 24 swings and slides on the first curved surface block 41, at this time... Figure 5 As shown, the locking spring 43 pushes the locking block 4 to make the first curved block 41 fit against the swing rod 24. Then, when the swing rod 24 passes the first curved block 41, the locking spring 43 pushes the side of the first curved block 41 to block the swing rod 24, thereby preventing the swing rod 24 from rebounding. When it is necessary to release the blockage of the swing rod 24, the locking spring 43 pushes the first curved block 41 to block the swing rod 24, thereby preventing the swing rod 24 from rebounding. Figure 4As shown, by pressing the push rod 22 to make the push rod 22 extrude on the second curved block 42, at this time the second curved block 42 is extruded to move away from the swing rod 24, and at the same time the second curved block 42 drives the locking block 4 to make the first curved block 41 slide and remove the shielding of the swing rod 24, then keep pressing the push rod 22 and swing the push rod 22 again to reset the swing rod 24, so as to realize the unlocking and resetting of the swing rod 24.

[0031] Further, the brake lever 26 is fixedly installed with a friction box 3, the friction box 3 is provided with a brake block 32 in the cavity 31, and the brake block 32 is provided with a matching curved surface on the side of the tire 11.

[0032] Specifically, by using the matching curved surface on the brake block 32, when the brake lever 26 swings to make the brake block 32 adhere to the tire 11, the matching curved surface adheres to the tire 11 to slow down the tire 11, and the matching curved surface can increase the contact surface between the brake block 32 and the tire 11, thereby better slowing down the tire 11.

[0033] Further, the matching curved surface of the brake block 32 is fixedly installed with an arc-shaped brake rubber 33.

[0034] Specifically, by using the arc-shaped brake rubber 33 on the brake block 32, the adhesion of the brake block 32 and the tire 11 is improved, and the friction between them is also increased, thereby improving the deceleration effect.

[0035] Further, the friction box 3 is symmetrically hingedly provided with a contact rod 35, the first ends of the two contact rods 35 are movably arranged on the opposite two side walls of the hub 1, and the contact rod 35 is provided with a torsion spring 37.

[0036] Specifically, the two ends of the torsion spring 37 are fixedly installed on the friction box 3 and the contact rod 35, and the contact rod 35 is driven to overturn to make the first end of the contact rod 35 adhere to the opposite two side walls of the hub 1, thereby further slowing down the hub 1.

[0037] Further, the first end of the contact rod 35 is fixedly installed with a speed reduction block 36.

[0038] Specifically, the speed reduction block 36 can be a rubber block, and the speed reduction blocks 36 on the two contact rods 35 adhere to the opposite two side walls of the hub 1 at the same time, thereby improving the effect of slowing down the hub 1.

[0039] Further, the brake block 32 is fixedly installed with a buffer spring 34, and the second ends of the two contact rods 35 are located on the moving path of the brake block 32.

[0040] Specifically, the two ends of the buffer spring 34 are fixedly installed on the brake block 32 and the friction box 3 respectively. When the arc-shaped brake rubber 33 on the brake block 32 is attached to the tire 11, as the brake lever 26 continues to swing, the brake block 32 stops moving due to the blockage of the tire 11, while the friction box 3 continues to move close to the tire 11. At this time, as shown in Figure 7 the brake block 32 simultaneously presses the second ends of the two contact rods 35, and then the first ends of the two contact rods 35 simultaneously approach and attach to the outer walls on the opposite sides of the wheel hub 1, so as to better improve the effect of decelerating the wheel hub 1 by utilizing the friction between the arc-shaped brake rubber 33 and the tire 11 and the friction between the deceleration block 36 and the wheel hub 1.

[0041] Furthermore, the contact rod 35 is a stainless steel rod.

[0042] Working principle: the pushing rod 22 is pushed forward to swing the swing rod 24 and slide on the first curved block 41. At this time, as shown in Figure 5 the locking spring 43 pushes the locking block 4 to make the first curved block 41 attach to the swing rod 24, and as the swing rod 24 swings, the swing rod 24 cooperates with the connecting rod 25 to swing the brake lever 26, which drives the friction box 3 to approach the tire 11. When the arc-shaped brake rubber 33 on the brake block 32 is attached to the tire 11, as the brake lever 26 continues to swing, the brake block 32 stops moving due to the blockage of the tire 11, while the friction box 3 continues to move close to the tire 11. At this time, as shown in Figure 7 the brake block 32 simultaneously presses the second ends of the two contact rods 35, and then the first ends of the two contact rods 35 simultaneously approach and attach to the outer walls on the opposite sides of the wheel hub 1, so as to better improve the effect of decelerating the wheel hub 1 by utilizing the friction between the arc-shaped brake rubber 33 and the tire 11 and the friction between the deceleration block 36 and the wheel hub 1. Then, when the swing rod 24 passes the first curved block 41, the side of the first curved block 41 is blocked to the swing rod 24 under the pushing of the locking spring 43, so as to avoid the swing rod 24 from rebounding. At this time, the arc-shaped brake rubber 33 and the deceleration block 36 remain in the attached state.

[0043] When it is necessary to unlock the swing rod 24, as shown in Figure 4 the pushing rod 22 is pressed to make the pushing rod 22 press on the second curved block 42, at this time, the second curved block 42 is away from the swing rod 24 due to the pressing, and the second curved block 42 drives the locking block 4 to make the first curved block 41 slide and unlock the swing rod 24. Then, the pushing rod 22 is kept pressed and swung again to reset the swing rod 24, so as to realize the unlocking and resetting of the swing rod 24.

[0044] The above has only described certain exemplary embodiments of the present application by way of illustration, and it is needless to say that the described embodiments can be modified in various ways without departing from the spirit and scope of the present application for those skilled in the art. Therefore, the above drawings and descriptions are illustrative in nature, and should not be understood as limiting the scope of protection of the claims of the present application.

Claims

1. A wheelchair comprising a wheel hub (1) and a tyre (11) on the wheel hub (1), characterised in that, Also include the brake box (2) and articulated disposed in the brake box (2) swing lever (24), the first end of the swing lever (24) is provided with a push rod (22) slidingly, the brake lever (26) is movably arranged on the tire (11) in the brake box (2) is hingedly arranged, and the brake lever (26) and the second end of the swing lever (24) are movably connected, the brake box (2) is provided with a locking block (4) slidingly, the swing lever (24) is slidingly arranged on the first curved block (41) provided on the locking block (4), the push rod (22) is slidingly arranged on the second curved block (42) provided on the locking block (4), and the locking block (4) slides to make the first curved block (41) off the swing lever (24) swing path.

2. A wheelchair according to claim 1, characterised in that The reset spring (23) is arranged between the swing lever (24) and the push rod (22), and the locking spring (43) is arranged between the locking block (4) and the brake box (2), the second end of the swing lever (24) is hingedly provided with a connecting rod (25), and the first end of the connecting rod (25) is hingedly provided on the brake lever (26).

3. A wheelchair according to claim 1, wherein, The brake lever (26) is fixedly installed with a friction box (3), the brake block (32) is arranged in the cavity (31) of the friction box (3), and the brake block (32) is provided with a fitting curved surface on one side of the tire (11).

4. A wheelchair according to claim 3, wherein, The fitting curved surface of the brake block (32) is fixedly installed with an arc-shaped brake rubber (33).

5. A wheelchair according to claim 3, wherein, The friction box (3) is symmetrically hingedly provided with a contact rod (35), the first ends of the two contact rods (35) are movably arranged on the opposite two side walls of the hub (1), and the contact rod (35) is provided with a torsion spring (37).

6. A wheelchair according to claim 5, wherein, The first end of the contact rod (35) is fixedly installed with a speed reducer (36).

7. A wheelchair according to claim 5, wherein, The brake block (32) is fixedly installed with a buffer spring (34), and the second ends of the two contact rods (35) are located on the moving path of the brake block (32).

8. A wheelchair according to claim 7, characterised in that The contact rod (35) is a stainless steel rod.

Images