Brake assembly for wheelchair

Abstract

The utility model relates to the technical field of brake technology, in particular to a brake assembly for a wheelchair, which comprises a shaft body, a polygonal sliding groove is arranged in the middle of the surface of the shaft body, and a mounting seat is fixedly connected with the wheelchair through a support. Annular teeth are fixed to the surfaces, close to each other, of the brake disc and the sliding disc, an annular seat is arranged between the brake disc and the mounting seat, and brake pads are fixed to the surfaces, close to each other, of the annular seat and the brake disc; an electromagnetic coil is arranged in the outer shell, and the outer shell is fixed on the other side surface of the mounting seat; the brake device has the beneficial effects that the sliding disc is installed on the outer side of the shaft body in a sliding mode, the annular base is arranged between the brake disc and the installation base, the annular base and the brake disc are driven to be close to the sliding disc through mutual extrusion between the wedge-shaped driving block and the wedge-shaped driven block, two annular teeth can also be meshed, and then the braking effect is achieved; and it is ensured that the device can be electrically braked and mechanically braked in the using process, and therefore potential safety hazards in the using process are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to brake technical field, concretely is a kind of brake assembly for wheelchair car. BACKGROUND

[0002] Wheelchair brake is a kind of safety device for controlling wheelchair travel, in actual use, when user needs to stop wheelchair or stable stay, the speed of wheelchair or the movement of wheelchair can be controlled by stepping on brake pedal or pulling brake handle.

[0003] In prior art, brake is installed on the side of wheelchair walking wheel, brake pad is arranged on brake, brake pad is controlled to move by electromagnetic coil, when brake pad is close to brake disc on walking wheel, the friction force is generated by mutual extrusion, to realize the brake stop of wheelchair walking wheel.

[0004] But at present, brake for wheelchair car only relies on electromagnetic coil to control start and stop, when battery power on wheelchair is insufficient or brake circuit where brake is located appears fault, brake on wheelchair is difficult to control, to have greater security risk. Therefore, the utility model provides a kind of brake assembly for wheelchair car to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of brake assembly for wheelchair car to solve the problems raised in the above background.

[0006] To achieve the above object, the utility model provides the following technical scheme: a kind of brake assembly for wheelchair car, the brake assembly for wheelchair car includes:

[0007] Shaft body, the surface middle part of the shaft body is provided with polygonal slide groove, the outer side of the polygonal slide groove is provided with sliding disc sliding along the length direction of shaft body, the one side of the sliding disc is provided with mounting seat, the mounting seat is fixedly connected with wheelchair by support;

[0008] The one side of the mounting seat is provided with brake disc, the surface of the brake disc and sliding disc mutually close is fixed with annular tooth, annular seat is arranged between the brake disc and mounting seat, the surface of the annular seat and brake disc mutually close is fixed with brake pad, the surface of the annular seat is fixed with wedge driven block, the mounting seat is provided with hollow structure, and driving ring is rotatably installed in the inside, the surface of the driving ring is fixed with wedge driving block, the surface of the mounting seat is provided with avoiding slot, the wedge driving block passes through avoiding slot and is pasted with the side surface of annular seat;

[0009] Shell, the electromagnetic coil is built-in in the shell, the shell is fixed on the other side of mounting seat.

[0010] Preferably, the outer side wall of the mounting seat is provided with a limiting slot communicating with the inner cavity, the outer side wall of the driving ring is fixedly provided with a control handle, and the control handle extends into the inner cavity of the limiting slot and extends to the outer side of the mounting seat.

[0011] Preferably, the wedge-shaped driven blocks, the wedge-shaped driving blocks and the avoiding grooves are provided with a plurality of and are arranged in annular arrays around the center of the annular seat, the center of the driving ring and the center of the mounting seat respectively, the wedge-shaped driven blocks and the wedge-shaped driving blocks are opposite in the inclined direction, the avoiding grooves are arc-shaped and coincide with the movement track of the wedge-shaped driving blocks, and the length of the avoiding grooves is smaller than the interval between two wedge-shaped driving blocks.

[0012] Preferably, the outer side of the shaft body is fixedly provided with a fixing disc, the fixing disc is fixedly connected with the walking wheel of the wheelchair, and the middle portion of the sliding disc is provided with a polygonal through hole matched with the polygonal sliding groove.

[0013] Preferably, the outer side of the annular seat is rotatably provided with a rotating disc, the edge of the rotating disc is movably provided with a screw rod, the screw rod is fixed to the surface edge of the brake disc, the end of the screw rod is provided with a compression nut, and the compression nut and the rotating disc are provided with a compression spring.

[0014] Preferably, the surface of the annular seat is fixedly connected with an annular cylinder, and the annular cylinder movably penetrates the middle portion of the mounting seat, the surface of the annular cylinder is provided with a sliding groove, the inner wall of the mounting seat is fixedly provided with a protrusion, and the protrusion is located in the inner cavity of the sliding groove and is in sliding connection with the sliding groove.

[0015] Preferably, one end of the sliding groove is provided with a reset spring, the reset spring is pressed on the other side of the mounting seat, and the sliding groove and the protrusion are provided with a plurality of and are arranged in annular arrays.

[0016] Compared with the prior art, the utility model has the advantages that:

[0017] The utility model discloses a sliding disc is installed on the outside of the shaft body, and the side of the mounting seat is provided with a brake disc, and the mutually close surfaces of the sliding disc and the brake disc are provided with annular teeth, and the brake disc and the mounting seat are provided with an annular seat, and the mutually close surfaces of the brake disc and the annular seat are provided with brake pads, and the brake disc and the annular seat always close to each other and produce friction, and the sliding disc and the brake disc keep separating from each other, when the shell body is electrified, the sliding disc moves and closes to the brake disc under electromagnetic force, until the two annular teeth interlock, at this moment, the sliding disc and the brake disc keep synchronous rotation, and the friction between the two brake pads can brake the rotation of the brake disc, thereby the rotation of the shaft body is braked, simultaneously, the user can also pull the control handle and drive the driving ring to rotate, and the annular seat and the brake disc are driven to close to the sliding disc through the mutual extrusion between the wedge driving block and the wedge driven block, and the two annular teeth can also interlock, and the braking effect is realized, and the device can be electrically braked and mechanically braked when using, thereby reducing the security risk when using. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is whole structure perspective view of the utility model;

[0019] Figure 2 It is whole structure explosion view of the utility model;

[0020] Figure 3 It is sliding disc and shaft body structure connection view of the utility model;

[0021] Figure 4 It is brake disc and annular seat structure perspective view of the utility model;

[0022] Figure 5 It is mounting seat structure explosion view of the utility model.

[0023] In the drawing: 1, shaft body;11, polygonal slide groove;2, fixed disc;3, sliding disc;31, annular tooth;4, mounting seat;41, driving ring;42, wedge driving block;43, avoiding groove;44, limit slot;45, control handle;46, lug;5, brake disc;51, screw;52, compression spring;53, compression nut;6, annular seat;61, wedge driven block;62, annular cylinder;63, sliding groove;64, return spring;65, rotating disc;7, brake pad;8, shell body. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme of the utility model to be clear, complete description, and the advantage is more clear and clear, the following combining with the drawings to the utility model embodiment carries out further detailed explanation. It should be understood that the specific embodiments described herein are part of the embodiments of the utility model, rather than all embodiments, only to explain the embodiments of the utility model, and is not used to limit the embodiments of the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor are within the scope of the utility model.

[0025] Embodiment one, please refer to Figures 1-5 The utility model provides a kind of technical scheme: a wheelchair brake component, it include: shaft body 1 and shell 8.

[0026] Specifically, polygonal chute 11 is opened in the surface middle part of shaft body 1, the outside of polygonal chute 11 is sleeved with the sliding disc 3 sliding along the length direction of shaft body 1, sliding disc 3 can only slide along the length direction of shaft body 1, and will not relatively rotate with shaft body 1, mounting seat 4 is provided at one side of sliding disc 3, mounting seat 4 is fixedly connected with wheelchair by support, round hole is opened in the middle part of mounting seat 4 and is movably sleeved on the outside of the end of shaft body 1, when shaft body 1 rotates, sliding disc 3 rotates along, and mounting seat 4 is fixed with wheelchair, and will not rotate.

[0027] Second, one side of the mounting seat 4 is provided with brake disc 5, brake disc 5 and sliding disc 3 are fixed with annular teeth 31 on the surface of each other, sliding disc 3 and brake disc 5 keep away from each other in the initial state, when sliding disc 3 and brake disc 5 close to each other, two annular teeth 31 can be meshed with each other, at this time sliding disc 3 and brake disc 5 can keep relative fixed, sliding disc 3 rotates can drive brake disc 5 rotate, brake disc 5 and mounting seat 4 between the annular seat 6, annular seat 6 and brake disc 5 are fixed with brake pad 7 on the surface of each other, brake disc 5 and annular seat 6 always keep close to each other, that is, two brake pads 7 keep extrusion state and have friction between each other, when sliding disc 3 close to brake disc 5 and drive brake disc 5 rotate through the meshing of two annular teeth 31 between each other, the friction between the two brake pads 7 can produce brake effect on brake disc 5, thereby forming brake on sliding disc 3 and shaft 1, in addition, the surface of annular seat 6 is fixed with wedge driven block 61, mounting seat 4 is provided with hollow structure, and the inside is rotatably installed with driving ring 41, the surface of driving ring 41 is fixed with wedge driving block 42, the surface of mounting seat 4 is provided with avoiding slot 43, wedge driving block 42 passes through avoiding slot 43 and is attached to the side surface of annular seat 6, so when the user drives driving ring 41 to rotate, wedge driving block 42 can slide in the cavity of avoiding slot 43 and extrude wedge driven block 61, so that annular seat 6 can move close to sliding disc 3, and because brake disc 5 and annular seat 6 always keep close to each other, so when annular seat 6 moves, brake disc 5 can move with it, until the annular teeth 31 between brake disc 5 and sliding disc 3 are meshed with each other, at this time sliding disc 3 can also be braked.

[0028] Further, the outer shell 8 is built-in electromagnetic coil, the outer shell 8 is fixed on the other side of mounting seat 4, the sliding disc 3 of the device is made of metal material, when the electromagnetic coil inside the outer shell 8 is electrified, the sliding disc 3 can move close to the outer shell 8, until the annular teeth 31 between the sliding disc 3 and the brake disc 5 keep meshing with each other, so the device can form electric brake on the shaft 1 through the electromagnetic coil, also can realize manual brake on the shaft 1 through rotating driving ring 41, thereby improving the safety during work and reducing the security risk.

[0029] In order to control the movement of brake disc 5, the application also has a limiting slot 44 which is communicated with the inner cavity of the outer side wall of mounting seat 4, the outer side wall of driving ring 41 is fixed with control handle 45, control handle 45 penetrates the inner cavity of limiting slot 44 and extends to the outside of mounting seat 4, the user can control driving ring 41 to rotate forward and reverse by pulling control handle 45, thereby controlling brake disc 5 and sliding disc 3 to close or away from each other.

[0030] In order to ensure that the brake disc 5 and the annular seat 6 move more smoothly, the wedge-shaped driven blocks 61, the wedge-shaped driving blocks 42 and the avoidance grooves 43 are all provided with a plurality of annular array distributions around the center of the annular seat 6, the center of the driving ring 41 and the center of the mounting seat 4, respectively, to ensure that the brake disc 5 and the annular seat 6 move more smoothly and are not easily inclined. The wedge-shaped driving blocks 42 and the wedge-shaped driven blocks 61 are opposite in the inclined direction, so that the wedge-shaped driving blocks 42 can extrude the wedge-shaped driven blocks 61 when moving, thereby realizing the movement of the annular seat 6. The avoidance grooves 43 are arc-shaped and coincide with the movement track of the wedge-shaped driving blocks 42. The length of the avoidance grooves 43 is less than the spacing between the two wedge-shaped driving blocks 42, which is used to limit the rotation angle of the driving ring 41.

[0031] In order to brake the walking wheels of the wheelchair, the fixed disc 2 is fixedly installed on the outer side of the shaft body 1. The fixed disc 2 is fixedly connected with the walking wheels of the wheelchair, that is, the walking wheels of the wheelchair are relatively fixed with the shaft body 1. The center of the shaft body 1 of the device coincides with the center of the walking wheels of the wheelchair. Therefore, the device can brake the walking wheels of the wheelchair by braking the rotation of the shaft body 1. The middle part of the sliding disc 3 is provided with a polygonal through hole matched with the polygonal sliding groove 11, so that the sliding disc 3 only slides in the length direction of the shaft body 1 and does not rotate relative to the shaft body 1. In addition, the fixed disc 2 and the sliding disc 3 are provided with magnet pieces on the side surfaces close to each other and are attracted to each other, which is used to reset the sliding disc 3 and ensure that the sliding disc 3 always keeps away from the brake disc 5. When the electromagnetic coil in the inner cavity of the shell body 8 is electrified, the magnetic field force generated by the electromagnetic coil on the sliding disc 3 is greater than the attraction force between the magnet pieces of the fixed disc 2 and the sliding disc 3. Therefore, the sliding disc 3 can move close to the brake disc 5. In addition, the fixed disc 2 and the sliding disc 3 can be reset by the tension spring. Here, the details are not described.

[0032] In order to adjust the braking force of the wheelchair, the rotating disc 65 is rotatably installed on the outer side of the annular seat 6. The rotating disc 65 and the annular seat 6 can be rotatably connected through a bearing or can be rotatably connected by forming a cooperation through the annular groove and the annular flange in the prior art. In short, the rotating disc 65 of the device can only rotate relative to the annular seat 6 on the outer side of the annular seat 6 and cannot be relatively displaced along the length direction of the shaft body 1 to cause separation. The screw rod 51 is movably and penetratively arranged at the edge of the rotating disc 65 and is fixed to the surface edge of the brake disc 5. The end of the screw rod 51 is provided with the compression nut 53, and the compression spring 52 is arranged between the compression nut 53 and the rotating disc 65. The screw rod 51 is screwed into the threaded hole 54 in the rotating disc 65, and the compression spring 52 is compressed between the rotating disc 65 and the compression nut 53. When the rotating disc 65 rotates, the screw rod 51 is driven to rotate, and the compression spring 52 is compressed to generate a force to drive the brake disc 5 to rotate. Figure 2 and Figure 4It can be known that the user can control the compression amount of the compression spring 52 by screwing the compression nut 53, so as to adjust the extrusion force between the two brake pads 7, and then control the friction force between the two brake pads 7, so as to adjust the braking force of the device on the wheelchair wheels.

[0033] In order to avoid the rotation of the annular seat 6, the application also has an annular barrel 62 fixedly connected in the middle of the surface of the annular seat 6, and the annular barrel 62 movably penetrates the middle of the mounting seat 4, the surface of the annular barrel 62 is provided with a sliding groove 63, the inner wall of the mounting seat 4 is fixedly provided with a protrusion 46, the protrusion 46 is located in the inner cavity of the sliding groove 63 and is in sliding connection with the sliding groove 63, and the protrusion 46 is in sliding connection with the sliding groove 63. Figure 4 And Figure 5 It can be known that the cooperation of the sliding groove 63 and the protrusion 46 can be used to limit the connection between the annular seat 6 and the mounting seat 4, so that the annular seat 6 can only slide towards or away from the mounting seat 4, and cannot rotate relative to the mounting seat 4, so that the friction force between the two brake pads 7 can brake the rotation of the shaft body 1.

[0034] In order to separate the brake disc 5 and the sliding disc 3 from each other, the application also has a reset spring 64 arranged on one end of the inner wall of the sliding groove 63, the reset spring 64 is pressed on the other side of the mounting seat 4, and the sliding groove 63 and the protrusion 46 are both provided with a plurality of annular array distributions, when the driving ring 41 is reset, the thrust generated by the reset spring 64 can drive the annular seat 6 to move towards the mounting seat 4, so as to realize the mutual separation between the brake disc 5 and the sliding disc 3.

[0035] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A wheelchair brake assembly comprising: The wheelchair brake assembly comprises: The surface of the shaft body (1) is provided with a polygonal sliding groove (11), the outer side of the polygonal sliding groove (11) is provided with a sliding disc (3) sliding along the length direction of the shaft body (1), one side of the sliding disc (3) is provided with a mounting seat (4), the mounting seat (4) is fixedly connected with the wheelchair through a support; One side of the mounting seat (4) is provided with a brake disc (5), the surfaces of the brake disc (5) and the sliding disc (3) close to each other are fixedly provided with annular teeth (31), an annular seat (6) is arranged between the brake disc (5) and the mounting seat (4), the surfaces of the annular seat (6) and the brake disc (5) close to each other are fixedly provided with brake pads (7), the surface of the annular seat (6) is fixedly provided with a wedge-shaped driven block (61), the mounting seat (4) is provided in a hollow structure and rotatably provided with a driving ring (41) in the inside, the surface of the driving ring (41) is fixedly provided with a wedge-shaped driving block (42), the surface of the mounting seat (4) is provided with an avoiding groove (43), the wedge-shaped driving block (42) passes through the avoiding groove (43) and is attached to the side surface of the annular seat (6). An outer shell (8) is arranged in the inside of the electromagnetic coil, and the outer shell (8) is fixed to the other side surface of the mounting seat (4).

2. A brake assembly for a wheelchair according to claim 1, wherein: The outer side wall of the mounting seat (4) is provided with a limiting slot (44) in communication with the inner cavity, and the outer side wall of the driving ring (41) is fixedly provided with a control handle (45), which penetrates the inner cavity of the limiting slot (44) and extends to the outer side of the mounting seat (4).

3. A brake assembly for a wheelchair according to claim 1, wherein: The wedge-shaped driven block (61), the wedge-shaped driving block (42) and the avoiding groove (43) are all provided with a plurality of annular array distributions around the center of the annular seat (6), the center of the driving ring (41) and the center of the mounting seat (4), respectively, the wedge-shaped driven block (61) and the wedge-shaped driving block (42) are oppositely inclined, the avoiding groove (43) is arc-shaped and coincides with the movement track of the wedge-shaped driving block (42), and the length of the avoiding groove (43) is smaller than the interval between the two wedge-shaped driving blocks (42).

4. A brake assembly for a wheelchair according to claim 1, wherein: The outer side of the shaft body (1) is fixedly provided with a fixed disc (2), the fixed disc (2) is fixedly connected with the walking wheel of the wheelchair, and the middle part of the sliding disc (3) is provided with a polygonal through hole matched with the polygonal sliding groove (11).

5. A brake assembly for a wheelchair according to claim 1, wherein: The outer side of the annular seat (6) is rotatably provided with a rotating disc (65), the edge of the rotating disc (65) is movably provided with a screw rod (51), the screw rod (51) is fixed to the surface edge of the brake disc (5), the end of the screw rod (51) is provided with a compression nut (53), a compression spring (52) is arranged between the compression nut (53) and the rotating disc (65).

6. A brake assembly for a wheelchair according to claim 1, wherein: The surface middle part of the annular seat (6) is fixedly connected with an annular cylinder (62), and the annular cylinder (62) movably penetrates the middle part of the mounting seat (4), the surface of the annular cylinder (62) is provided with a sliding groove (63), the inner wall of the mounting seat (4) is fixedly provided with a protrusion (46), the protrusion (46) is located in the inner cavity of the sliding groove (63) and is in sliding connection with the sliding groove (63).

7. A brake assembly for a wheelchair according to claim 6 wherein: One end of the sliding groove (63) is provided with a reset spring (64), the reset spring (64) is pressed on the other side of the mounting seat (4), and the sliding groove (63) and the protrusion (46) are all provided with a plurality of annular array distribution.

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