Separable headstock brake wheelchair rear wheel connecting mechanism

Abstract

The invention relates to the technical field of wheelchairs, and particularly discloses a separable headstock brake wheelchair rear wheel connecting mechanism which comprises a headstock, a wheelchair frame and rear wheels, the rear wheels are rotatably mounted at the bottom end of the wheelchair frame through roll shafts, and the headstock, the wheelchair frame and the rear wheels are detachably connected through supporting assemblies. A control assembly used for controlling a brake cable is arranged on the bicycle head, two rear wheels of the rear wheels are each provided with a disc brake mechanism, a linkage assembly, a brake cable set and a transmission assembly are arranged between the control assembly and brakes of the two disc brake mechanisms, and the supporting assembly comprises a first connecting piece and a second connecting piece. The safety effects that a brake handle is pinched by one hand and two wheels brake synchronously are achieved, an auxiliary reset structure for a brake cable is arranged, the sensitivity of brake cancelling is improved, a vehicle head is convenient to disassemble and assemble, and the occupied space in the transportation process is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of wheelchairs, and in particular to a detachable front brake and rear wheel connecting mechanism for a wheelchair. Background Art

[0002] A wheelchair is an assistive device that provides mobility and support for people with limited mobility or patients. It comes in many types and functions.

[0003] The Chinese patent (CN202446372U) discloses a labor-saving wheelchair, including a front frame, a rear frame, a seat arranged on the front frame, a rear wheel arranged on the rear frame, and two front wheels arranged on both sides of the axle of the front frame, and also includes a left drive rod and a right drive rod located in front of the seat, and the lower ends of the left drive rod and the right drive rod are respectively connected to the sprockets arranged on the front frame, and the sprockets are connected to the flywheels on the axles through chains. The left drive rod and the right drive rod are respectively provided with brake calipers, and the brake calipers are connected to the upper ends of the brake lines, and the lower ends of the brake lines are respectively connected to the disc brake devices arranged on the wheel hubs of the left and right front wheels.

[0004] However, there are some drawbacks in the above-mentioned related technologies. For example, during the use of the wheelchair, since most wheelchairs on the market use front wheel brakes, the comfort and safety are not good enough; and although some wheelchairs use rear wheel brakes, since the two rear wheels are generally braked separately through two sets of left and right brake connection mechanisms, braking is not convenient enough, and the braking process of the two rear wheels is difficult to synchronize, which is prone to bumps. Summary of the invention

[0005] In order to solve the above problems existing in the prior art, the present invention provides a detachable front brake wheelchair rear wheel connection mechanism, which can overcome the technical defects.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A detachable front brake wheelchair rear wheel connection mechanism comprises a front wheelchair, a wheelchair frame and rear wheels, the rear wheels are rotatably mounted on the bottom end of the wheelchair frame via roller shafts, the front wheelchair, the wheelchair frame and the rear wheels are detachably connected via a support assembly, a control assembly for controlling a brake line is arranged on the front wheelchair, both rear wheels of the rear wheels are provided with disc brake mechanisms, and a linkage assembly, a brake line assembly and a transmission assembly are arranged between the control assembly and the brakes of the two disc brake mechanisms;

[0008] The support assembly comprises a first connecting member and a second connecting member, wherein two second connecting members which are spaced apart are fixedly mounted on two opposite sides of the first connecting member by bolts;

[0009] The linkage assembly includes a brake line tube seat, which is installed on one side of the first connecting member by bolts, a tube cover is installed at one end of the brake line tube seat close to the front of the vehicle, a slider is slidably installed in the brake line tube seat, the slider is fixedly connected to the end of the brake line connected to the control assembly, a linkage block is fixedly installed at one end of the slider away from the tube cover, and a spring is installed between the slider and the side facing the tube cover;

[0010] The brake cable assembly includes a fixing seat and a rear wheel brake cable. The fixing seat is fixedly installed on the side wall of the second connecting member close to the linkage assembly. Two sleeves are penetrated by the fixing seat. The rear wheel brake cable passes through the two sleeves. The two ends of the rear wheel brake cable are respectively connected to the brakes of two disc brake mechanisms.

[0011] Preferably, a receiving block is fixedly mounted on one end of the first connecting member away from the second connecting member, and the receiving block is fixedly connected to the vehicle head by bolts.

[0012] Preferably, a first hoop seat is fixedly installed between the two second connecting members by bolts, the first hoop seat is sleeved on the side wall of the frame rod of the wheelchair frame, and a second hoop seat is fixedly installed on one end of the second connecting member away from the first connecting member, and the second hoop seat is sleeved on the roller shaft of the rear wheel.

[0013] Preferably, a wire protection tube is passed through and slidably sleeved on the tube cover, and the wire protection tube is fixedly sleeved on a brake line connected to the control assembly.

[0014] Preferably, two threaded holes are provided at the top of the slider, and the slider is connected with screws through the threaded holes. A first limiting groove is provided at the top of the brake line tube seat, and the first limiting groove is provided in a rounded rectangular shape. The moving track of the screw on the slider is located in the first limiting groove.

[0015] Preferably, the transmission assembly includes a rear brake sliding seat, which is slidably mounted on the side wall of the second connecting member, a pull wire is provided on the side of the rear brake sliding seat close to the fixed seat, an end of the pull wire away from the rear brake sliding seat is connected to a movable part, an end of the movable part away from the rear brake sliding seat is rotatably mounted with a roller, and the rear wheel brake wire is wrapped around the side wall of the roller.

[0016] Preferably, the side wall of the rear brake sliding seat is provided with two second limiting grooves, the second limiting grooves are arranged in a rounded rectangular shape, and the side of the wheelchair frame close to the rear brake sliding seat is threadedly connected with two fasteners, and the fasteners are located in the second limiting grooves.

[0017] Preferably, a groove is provided on one side of the rear brake sliding seat close to the second connecting member, the linkage block is arranged in an L-shape, and the vertical section of the linkage block is clamped in the groove of the rear brake sliding seat.

[0018] The beneficial effects of the present invention are:

[0019] 1. By setting the control component and the two disc brake mechanisms and the linkage component, brake line group and transmission component therebetween, the beneficial effect can be obtained that the rear brake sliding seat is slidably installed on the side wall of the second connecting member, a pull line is arranged on the side of the rear brake sliding seat close to the fixed seat, the end of the pull line away from the rear brake sliding seat is connected to a movable part, the end of the movable part away from the rear brake sliding seat is rotatably installed with a roller, the rear wheel brake line is wound around the side wall of the roller, a groove is arranged on the side of the rear brake sliding seat close to the second connecting member, the linkage block is arranged in an L shape, and the vertical section of the linkage block is clamped in the groove of the rear brake sliding seat;

[0020] Squeeze the handle of the control assembly and pull the brake wire on the front of the vehicle, pull the slider in the brake wire pipe seat to slide toward the front of the vehicle, the spring is compressed, and cooperates with the linkage block to drive the rear brake sliding seat and the slider to slide synchronously, cooperate with the pull wire and roller, pull the rear wheel brake wire to slide, cooperate with the two disc brake mechanisms to brake the two wheels of the rear wheel, release the control assembly, the spring drives the slider to reset, the rear brake sliding seat to reset synchronously, the pull wire, movable parts, roller and rear wheel brake wire are reset under the action of the disc brake mechanism, and the braking is cancelled, achieving the safety effect of double-wheel synchronous braking by squeezing the brake handle with one hand.

[0021] 2. By setting the linkage assembly, the beneficial effect that can be obtained is that the brake line tube seat is installed on one side of the first connecting member by bolts, a tube cover is installed at one end of the brake line tube seat close to the front of the vehicle, a slider is slidably installed in the brake line tube seat, the slider is fixedly connected to the end of the brake line connected to the control assembly, a linkage block is fixedly installed at one end of the slider away from the tube cover, and a spring is installed between the slider and the side facing the tube cover;

[0022] Release the control assembly, the spring drives the slider to reset, the rear brake sliding seat resets synchronously, the pull wire, movable parts, rollers and rear wheel brake line are reset under the action of the disc brake mechanism, and the brake line is divided into two sections, which has an auxiliary reset structure for the brake line and improves the sensitivity of brake cancellation.

[0023] 3. By setting the support assembly and the linkage assembly, the beneficial effect that can be obtained is that the support assembly includes a first connecting member and a second connecting member, two second connecting members distributed at intervals are fixedly installed on opposite sides of the first connecting member by bolts, a receiving block is fixedly installed on one end of the first connecting member away from the second connecting member, the receiving block is fixedly connected to the front of the vehicle by bolts, a brake line pipe seat is installed on one side of the first connecting member by bolts, a pipe cover is installed on one end of the brake line pipe seat close to the front of the vehicle, a groove is arranged on one side of the rear brake sliding seat close to the second connecting member, the linkage block is arranged in an L shape, and the vertical section of the linkage block is clamped in the groove of the rear brake sliding seat;

[0024] The first connecting member and the two second connecting members are fixed to each other by multiple bolts, the second connecting member is fixedly connected to the wheelchair frame by the first hoop seat, the second connecting member is fixedly connected to the wheelchair frame by the second hoop seat, the first connecting member is detachably connected to the front of the vehicle by the receiving block, the front of the vehicle can be quickly separated from the wheelchair, which is convenient for the assembly of the wheelchair and saves space during transportation. The brake line pipe seat is detachably connected to the first connecting member by bolts. The brake line pipe seat is eliminated by removing the bolts, the linkage block and the rear brake sliding seat are separated from each other, the front of the vehicle is completely disassembled, which is convenient for disassembly and assembly of the front of the vehicle and reduces the space occupied during transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is the installation structure diagram of the vehicle head and the receiving block in the present invention;

[0028] Figure 3 This is a diagram of the installation structure of the support assembly in the present invention;

[0029] Figure 4 An exploded view of the support assembly of the present invention;

[0030] Figure 5 An exploded view of the linkage assembly in the present invention;

[0031] Figure 6 It is the installation structure diagram of the transmission assembly in the present invention;

[0032] Figure 7 It is the installation structure diagram of the rear brake sliding seat in the present invention.

[0033] Description of reference numerals:

[0034] In the figure: 1, front of the vehicle; 11, receiving block; 12, control assembly; 2, wheelchair frame; 21, first hoop seat; 3, rear wheel; 31, second hoop seat; 32, disc brake mechanism; 41, first connecting piece; 42, second connecting piece; 5, linkage assembly; 51, brake line pipe seat; 52, pipe cover; 53, slider; 54, linkage block; 55, spring; 56, wire protection pipe; 57, threaded hole; 58, first limiting groove; 6, brake line group; 61, fixing seat; 62, sleeve; 63, rear wheel brake line; 7, transmission assembly; 71, rear brake sliding seat; 72, pull wire; 73, movable part; 74, roller; 75, second limiting groove; 76, fastener; 77, groove. DETAILED DESCRIPTION

[0035] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are clearly and completely described below in combination with the accompanying drawings and preferred embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In the description of the present application, it should be understood that the orientation or position relationship indicated by "inside", "outside", etc. is based on the orientation or position described in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, a specific orientation structure and operation, and therefore cannot be understood as a limitation on the present application.

[0037] Reference Figure 1-Figure 7 , which is a detachable front brake wheelchair rear wheel connection mechanism disclosed by the present invention, includes a front wheelchair 1, a wheelchair frame 2 and a rear wheel 3. The rear wheel 3 is rotatably installed on the bottom end of the wheelchair frame 2 through a roller shaft. The front wheelchair 1, the wheelchair frame 2 and the rear wheel 3 are detachably connected through a supporting assembly. A control assembly 12 for controlling the brake line is provided on the front wheelchair 1, and both rear wheels of the rear wheel 3 are provided with a disc brake mechanism 32. A linkage assembly 5, a brake line group 6 and a transmission assembly 7 are provided between the control assembly 12 and the brakes of the two disc brake mechanisms 32.

[0038] The supporting assembly includes a first connecting member 41 and a second connecting member 42. The two second connecting members 42 are fixedly installed on opposite sides of the first connecting member 41 at intervals by bolts. A receiving block 11 is fixedly installed on one end of the first connecting member 41 away from the second connecting member 42. The receiving block 11 is fixedly connected to the front of the vehicle 1 by bolts. A first hoop seat 21 is fixedly installed between the two second connecting members 42 by bolts. The first hoop seat 21 is sleeved on the side wall of the frame rod of the wheelchair frame 2. A second hoop seat 31 is fixedly installed on one end of the second connecting member 42 away from the first connecting member 41. The second hoop seat 31 is sleeved on the roller shaft of the rear wheel 3. The first connecting member 41 and the two second connecting members 42 are fixed to each other by multiple bolts. The second connecting member 42 is fixedly connected to the wheelchair frame 2 through the first hoop seat 21. The second connecting member 42 is fixedly connected to the wheelchair frame 2 through the second hoop seat 31. The first connecting member 41 is detachably connected to the front of the vehicle 1 through the receiving block 11.

[0039] The linkage assembly 5 includes a brake line tube seat 51, which is installed on one side of the first connecting member 41 by bolts. A tube cover 52 is installed at one end of the brake line tube seat 51 close to the front of the vehicle 1. A slider 53 is slidably installed in the brake line tube seat 51. The slider 53 is fixedly connected to the end of the brake line connected to the control assembly 12. A linkage block 54 is fixedly installed at one end of the slider 53 away from the tube cover 52. A spring 55 is installed between the slider 53 and the tube cover 52 facing each other. The tube cover 52 penetrates and slides through the sleeve A wire protection tube 56 is connected, and the wire protection tube 56 is fixedly sleeved with the brake wire connected to the control assembly 12. Two threaded holes 57 are arranged at the top of the slider 53, and the slider 53 is connected with screws through the threaded holes 57. A first limiting groove 58 is arranged at the top of the brake wire tube holder 51. The first limiting groove 58 is arranged in a rounded rectangular shape. The moving track of the screw on the slider 53 is located in the first limiting groove 58. The brake wire tube holder 51 is detachably connected to the first connecting member 41 by bolts. The brake wire tube holder 51 can be cancelled by removing the bolts.

[0040] The brake cable assembly 6 includes a fixing seat 61 and a rear wheel brake cable 63. The fixing seat 61 is fixedly installed on the side wall of the second connecting member 42 close to the linkage assembly 5. Two sleeves 62 are provided through the fixing seat 61. The rear wheel brake cable 63 passes through the two sleeves 62. The two ends of the rear wheel brake cable 63 are respectively connected to the brakes of the two disc brake mechanisms 32, wherein the brakes are not limited to cable brakes and hydraulic brakes.

[0041] The transmission assembly 7 includes a rear brake sliding seat 71, which is slidably mounted on the side wall of the second connecting member 42. A pull wire 72 is provided on the side of the rear brake sliding seat 71 close to the fixed seat 61. The end of the pull wire 72 away from the rear brake sliding seat 71 is connected to a movable member 73. The end of the movable member 73 away from the rear brake sliding seat 71 is rotatably mounted with a roller 74. The rear wheel brake wire 63 is wound around the side wall of the roller 74. The side wall of the rear brake sliding seat 71 is provided with two second limiting grooves 75. The second limiting grooves 75 are arranged in a rounded rectangular shape. Two fasteners 76 are threadedly connected to one side of the wheelchair frame 2 close to the rear brake sliding seat 71. The fasteners 76 are located in the second limiting grooves 75. A groove is provided on the side of the rear brake sliding seat 71 close to the second connecting member 42. 77, the linkage block 54 is L-shaped, and the vertical section of the linkage block 54 is clamped in the groove 77 of the rear brake sliding seat 71. The handle of the control assembly 12 is squeezed by hand to pull the brake line on the front of the vehicle 1, and the slider 53 is pulled to slide toward the front of the vehicle 1 in the brake line tube seat 51. The spring 55 is compressed and cooperates with the linkage block 54 to drive the rear brake sliding seat 71 and the slider 53 to slide synchronously. Cooperate with the pull wire 72 and the roller 74 to pull the rear wheel brake line 63 to slide, and cooperate with the two disc brake mechanisms 32 to brake the two wheels of the rear wheel 3. Release the control assembly 12, the spring 55 drives the slider 53 to reset, and the rear brake sliding seat 71 is reset synchronously. The pull wire 72, the movable part 73, the roller 74 and the rear wheel brake line 63 are reset under the action of the disc brake mechanism 32, and the braking is cancelled.

[0042] The working principle and use process of the present invention are as follows: the first connecting member 41 and the two second connecting members 42 are fixed to each other by multiple bolts, the second connecting member 42 is fixedly connected to the wheelchair frame 2 by the first hoop seat 21, the second connecting member 42 is fixedly connected to the wheelchair frame 2 by the second hoop seat 31, the first connecting member 41 is detachably connected to the front of the vehicle 1 by the receiving block 11, the front of the vehicle 1 can be quickly separated from the wheelchair, which is convenient for the assembly of the wheelchair and saves space for transportation, the brake line pipe seat 51 is detachably connected to the first connecting member 41 by bolts, the brake line pipe seat 51 is removed by removing the bolts, the linkage block 54 is separated from the rear brake sliding seat 71, the front of the vehicle 1 is disassembled, and the need When braking, the user squeezes the handle of the control assembly 12 and pulls the brake wire on the front of the vehicle 1, pulling the slider 53 to slide in the brake wire tube seat 51 toward the front of the vehicle 1. The spring 55 is compressed and cooperates with the linkage block 54 to drive the rear brake sliding seat 71 to slide synchronously with the slider 53. Cooperating with the pull wire 72 and the roller 74, the rear wheel brake wire 63 is pulled to slide, and the two disc brake mechanisms 32 are cooperated to brake the two wheels of the rear wheel 3. The control assembly 12 is released, and the spring 55 drives the slider 53 to reset, and the rear brake sliding seat 71 is reset synchronously. The pull wire 72, the movable part 73, the roller 74 and the rear wheel brake wire 63 are reset under the action of the disc brake mechanism 32, and the braking is cancelled.

[0043] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A detachable front brake wheelchair rear wheel connection mechanism, comprising a front wheelchair (1), a wheelchair frame (2) and a rear wheel (3), It is characterized in that The rear wheel (3) is rotatably mounted on the bottom end of the wheelchair frame (2) via a roller shaft; the front wheel (1), the wheelchair frame (2) and the rear wheel (3) are detachably connected via a support assembly; a control assembly (12) for controlling a brake line is provided on the front wheel (1); both rear wheels of the rear wheel (3) are provided with a disc brake mechanism (32); a linkage assembly (5), a brake line assembly (6) and a transmission assembly (7) are provided between the control assembly (12) and the brakes of the two disc brake mechanisms (32); The support assembly comprises a first connecting member (41) and a second connecting member (42), wherein two second connecting members (42) are spaced apart and fixedly mounted on opposite sides of the first connecting member (41) by means of bolts; The linkage assembly (5) comprises a brake line tube seat (51), the brake line tube seat (51) is installed on one side of the first connecting member (41) by means of bolts, a tube cover (52) is installed at one end of the brake line tube seat (51) close to the vehicle head (1), a slider (53) is slidably installed in the brake line tube seat (51), the slider (53) is fixedly connected to the end of the brake line connected to the control assembly (12), a linkage block (54) is fixedly installed at one end of the slider (53) away from the tube cover (52), and a spring (55) is installed between the slider (53) and the tube cover (52) facing each other; The brake line assembly (6) comprises a fixing seat (61) and a rear wheel brake line (63); the fixing seat (61) is fixedly mounted on a side wall of a second connecting member (42) close to the linkage assembly (5); two sleeves (62) are provided through the fixing seat (61); the rear wheel brake line (63) passes through the two sleeves (62); and the two ends of the rear wheel brake line (63) are respectively connected to the brakes of two disc brake mechanisms (32).

2. A detachable front brake wheelchair rear wheel connection mechanism according to claim 1, It is characterized in that A receiving block (11) is fixedly mounted on one end of the first connecting member (41) away from the second connecting member (42), and the receiving block (11) is fixedly connected to the vehicle head (1) by means of bolts.

3. A detachable front brake wheelchair rear wheel connection mechanism according to claim 1, It is characterized in that A first hoop seat (21) is fixedly installed between the two second connecting members (42) by means of bolts, the first hoop seat (21) is sleeved on the side wall of the frame rod of the wheelchair frame (2), and a second hoop seat (31) is fixedly installed on one end of the second connecting member (42) away from the first connecting member (41), and the second hoop seat (31) is sleeved on the roller shaft of the rear wheel (3).

4. A detachable front brake wheelchair rear wheel connection mechanism according to claim 1, It is characterized in that A wire protection tube (56) is passed through the tube cover (52) and is slidably sleeved thereon. The wire protection tube (56) is fixedly sleeved thereon with a brake wire connected to the control assembly (12).

5. A detachable front brake wheelchair rear wheel connection mechanism according to claim 1, It is characterized in that The top of the slider (53) is provided with two threaded holes (57), and the slider (53) is connected with screws through the threaded holes (57). The top of the brake line tube seat (51) is provided with a first limiting groove (58), and the first limiting groove (58) is arranged in a rounded rectangular shape. The moving track of the screw on the slider (53) is located in the first limiting groove (58).

6. A detachable front brake wheelchair rear wheel connection mechanism according to claim 1, It is characterized in that The transmission assembly (7) includes a rear brake sliding seat (71), and the rear brake sliding seat (71) is slidably mounted on the side wall of the second connecting member (42). A pull wire (72) is provided on the side of the rear brake sliding seat (71) close to the fixed seat (61), and the end of the pull wire (72) away from the rear brake sliding seat (71) is connected to a movable member (73), and the end of the movable member (73) away from the rear brake sliding seat (71) is rotatably mounted with a roller (74), and the rear wheel brake wire (63) is wound around the side wall of the roller (74).

7. A detachable front brake wheelchair rear wheel connection mechanism according to claim 6, It is characterized in that The side wall of the rear brake sliding seat (71) is provided with two second limiting grooves (75), the second limiting grooves (75) are arranged in a rounded rectangular shape, and one side of the wheelchair frame (2) close to the rear brake sliding seat (71) is threadedly connected with two fasteners (76), and the fasteners (76) are located in the second limiting grooves (75).

8. A detachable front brake wheelchair rear wheel connection mechanism according to claim 6, It is characterized in that A groove (77) is provided on one side of the rear brake sliding seat (71) close to the second connecting member (42); the linkage block (54) is arranged in an L-shape, and the vertical section of the linkage block (54) is clamped in the groove (77) of the rear brake sliding seat (71).

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