Rear wheel limiting structure of wheelchair with rear brake and detachable rear wheels

Abstract

The rear wheel limiting structure comprises a non-drive rear axle, rear wheels, a disc brake mounting plate and a limiting mechanism, a disc brake disc synchronous with the rear wheels is coaxially arranged on the side, close to the non-drive rear axle, of each rear wheel, one end of the disc brake mounting plate is fixedly assembled at the end of the non-drive rear axle, and the other end of the disc brake mounting plate is fixedly assembled at the other end of the non-drive rear axle. Each disc brake installation plate is provided with a disc brake device used for limiting and braking a rear wheel, each disc brake device comprises a disc brake body and an arc-shaped adjusting plate, the positions, close to the two ends, of each arc-shaped adjusting plate are provided with a hinge hole and a limiting hole respectively, the hinge holes are hinged to the front ends of the disc brake installation plates, and the limiting mechanisms are arranged in the middles of the bottom edges of the disc brake installation plates. When the rear wheel is disassembled, the limiting mechanism is pulled to be separated from the limiting hole, the disc brake disc can be separated from the disc brake device, limiting of the disc brake device to the disc brake disc can be relieved, limiting of the rear wheel is further relieved, and therefore the rear wheel can be easily disassembled from the non-drive rear axle, and convenience and rapidness are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of wheelchairs, in particular to a rear wheel limiting structure of a wheelchair with a rear brake and a detachable rear wheel. Background Art

[0002] A wheelchair is a means of transportation and rehabilitation for people with physical disabilities or limited mobility. With the help of a wheelchair, people with physical disabilities or limited mobility can exercise and participate in social activities. A three-wheeled wheelchair is a type of wheelchair. It adds a steering wheel and a nose to the front of an ordinary wheelchair, making it smoother and faster to travel, and more convenient for users to control the direction, and making it easier to make the wheelchair into an electric wheelchair.

[0003] In order to increase safety, it is necessary to add a brake system to the electric wheelchair. The rear brakes of existing wheelchairs are mostly fixed and cannot be disassembled at will, which results in the rear wheels (large wheels) that cooperate with the rear brakes also cannot be disassembled at will. According to the needs of users: when disabled people travel long distances, they need to put the wheelchair in the trunk of the vehicle for carrying. Since the wheelchair is large, it cannot be put in the whole. The head and two rear wheels need to be removed separately and put into the trunk, so the rear wheel needs to maintain the quick release function. In order to meet the quick release of the rear wheel without affecting the use of the rear brake, the utility model is proposed. Utility Model Content

[0004] The utility model aims to provide a rear wheel limiting structure of a wheelchair with a rear brake and a detachable rear wheel, so as to meet the demand of quick release of the rear wheel without affecting the use of the rear brake.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] The rear wheel limiting structure of a wheelchair with a rear brake and a detachable rear wheel comprises:

[0007] No drive rear axle;

[0008] A rear wheel is movably plugged into the end of the non-drive rear axle through a half-shaft, a bearing is arranged at the center of the rear wheel, one end of the half-shaft is inserted into the inner ring of the bearing, and the other end is inserted into the non-drive rear axle, and a disc brake disc synchronized with the rear wheel is coaxially arranged on one side of the rear wheel close to the non-drive rear axle;

[0009] A disc brake mounting plate with one end fixedly mounted on the end of the non-drive rear axle and the other end extending forward, each of the disc brake mounting plates is equipped with a disc brake for limiting and braking the rear wheels, and the disc brake comprises a disc brake body for braking in cooperation with the disc brake disc and an arc-shaped adjustment plate arranged on the outer ring of the disc brake body, and each of the arc-shaped adjustment plates is provided with a hinge hole and a limit hole near both ends, and the hinge hole is hinged to the front end of the brake mounting plate;

[0010] A limiting mechanism is arranged at the middle part of the bottom edge of the disc brake mounting plate and is used to cooperate with the limiting hole to limit the disc brake.

[0011] Furthermore, the rear end of the disc brake mounting plate is fixedly mounted on the end of the non-drive rear axle, and a circular hole corresponding to the end of the non-drive rear axle is provided on the disc brake mounting plate. The end of the non-drive rear axle and the outer side of the disc brake mounting plate are also fixedly equipped with a locking nut for fixing and limiting the disc brake mounting plate.

[0012] Furthermore, a mounting side plate for mounting a wheelchair frame is provided at the end of the non-drive rear axle, and the bottom end of the disc brake mounting plate is fixedly connected to the mounting side plate by bolts.

[0013] Furthermore, both ends of the arc-shaped adjustment plate are respectively assembled on the disc brake body through adjustment bolts, and the disc brake body is provided with a pair of brake pads for engaging and braking the disc brake disc.

[0014] Furthermore, the hinge hole is a threaded hole, the limiting hole is a through hole, the front end of the disc brake mounting plate is hinged to the arc-shaped adjustment plate through a screw rod, and the front end of the disc brake mounting plate is provided with a threaded hole corresponding to the screw rod.

[0015] Furthermore, the limiting mechanism includes a sleeve, a limiting pin and a spring. The limiting pin is a variable diameter structure with one end larger than the other and a step formed thereon. The opening sizes at both ends of the sleeve are adapted to the passages at both ends of the limiting pin. The limiting pin is slidably assembled in the sleeve. One end of the spring contacts the step and the other end contacts the end of the sleeve. Beneficial Effects

[0016] The utility model fixes the disc brake through a structural form in which one side of the disc brake is hinged to the front end of the disc brake mounting plate and the other side is limitedly engaged with the middle part of the bottom edge of the disc brake mounting plate, thereby realizing the limiting and braking of the rear wheel by the disc brake. When the rear wheel needs to be disassembled, it is only necessary to pull the limiting mechanism and the limiting hole to disengage, and then adjust the position of the disc brake to disengage the disc brake disc from the disc brake, so that the limiting of the disc brake on the disc brake disc can be released, and then the limiting of the rear wheel can be released, so that the rear wheel can be easily disassembled from the non-drive rear axle, which is convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0019] Figure 2 It is a front view of the utility model.

[0020] Figure 3 This is a three-dimensional structural diagram of the utility model after the half shaft 2 and the rear wheel 3 are removed.

[0021] Figure 4 This is an exploded view of the structure of the utility model.

[0022] Figure 5 is a schematic diagram of the structure of the disc brake 6,

[0023] Figure 6 is a schematic diagram of the structure of the disc brake mounting plate 5,

[0024] Figure 7 is a cross-sectional view of the limiting mechanism 7,

[0025] The reference numerals are as follows:

[0026] Non-drive rear axle 1, half shaft 2, rear wheel 3, disc brake disc 4, disc brake mounting plate 5, round hole 51, disc brake 6, disc brake body 61, arc-shaped adjustment plate 62, hinge hole 621, limit hole 622, limit mechanism 7, sleeve 71, limit pin 72, spring 73, step 74, locking nut 8, mounting side plate 9. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solution of the utility model, the utility model is described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the protection scope of the utility model.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0029] It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0030] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0031] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] See also Figure 1 —7, the utility model provides a rear wheel limiting structure of a wheelchair with a rear brake and a detachable rear wheel, comprising a non-driven rear axle 1, a rear wheel 3, a disc brake mounting plate 5 and a limiting mechanism 7, wherein:

[0033] The non-drive rear axle 1 is a supporting bridge, which is only used to provide support for the wheelchair. The rear wheel 3 is movably connected to the end of the non-drive rear axle 1 through a half-axle 2. A bearing is provided at the center of the rear wheel 3. One end of the half-axle 2 is inserted into the inner ring of the bearing, and the other end is inserted into the non-drive rear axle 1. In order to ensure the stability of the wheelchair, the outer diameter of the half-axle 2 needs to be compatible with the inner diameter of the non-drive rear axle 1 and the inner diameter of the inner ring of the bearing, and the matching tolerance cannot be too large. In addition, a limit plate is provided at one end of the half-axle 2 inserted into the inner ring of the bearing, so that the rear wheel 3 will not be separated from the half-axle 2 when the wheelchair is moving. A disc brake 4 synchronized with the rear wheel 3 is coaxially provided on one side of the single rear wheel 3 close to the non-drive rear axle 1;

[0034] One end of the disc brake mounting plate 5 is fixedly mounted on the end of the non-drive rear axle 1, and the other end extends forward. Specifically, the rear end of the disc brake mounting plate 5 is fixedly sleeved on the end of the non-drive rear axle 1, and a circular hole 51 corresponding to the end of the non-drive rear axle 1 is provided on the disc brake mounting plate 5. A locking nut 8 for fixing and limiting the disc brake mounting plate 5 is also fixedly mounted on the end of the non-drive rear axle 1 and on the outer side of the disc brake mounting plate 5. The end of the non-drive rear axle 1 is also provided with a mounting side plate 9 for mounting a wheelchair frame. In order to ensure that the disc brake mounting plate 5 is firmly installed, the bottom end of the disc brake mounting plate 5 is fixedly connected to the mounting side plate 9 by bolts. The disc brake mounting plate 5 is fixed at two points with the non-drive rear axle 1 and the mounting side plate 9, respectively, so that it is more stable and firm.

[0035] The disc brake mounting plate 5 is equipped with a disc brake 6 for limiting and braking the rear wheel 3. The disc brake 6 is a commercially available product, including a disc brake body 61 that cooperates with the disc brake disc 4 for braking and an arc-shaped adjustment plate 62 arranged on the outer ring of the disc brake body 61. Figure 5 Specifically, both ends of the arc-shaped adjustment plate 62 are respectively assembled on the disc brake body 61 through adjustment bolts, and a return spring is sleeved on the outer ring of a single adjustment bolt. A pair of brake pads for engaging and braking the disc brake disc 4 are provided on the disc brake body 61. The disc brake disc 4 is located between the two brake pads, thereby realizing the limitation of the two brake pads on the disc brake disc 4, such as Figure 3 The disc brake 6 belongs to the common prior art. The principle is that one brake pad is fixed and the other can be lifted. The bottom is fixedly connected to a lifting rod with an external thread. The disc brake body 61 is provided with an internal thread adapted to the lifting rod. An operating handle is provided at the free end of the lifting rod. A reset spring with relatively large elastic force is provided on the outer ring of the lifting rod. The operating handle is pulled by a pull wire to clamp the disc brake 4 with two brake pads for braking. The pull wire is released, and the two brake pads are reset under the action of the reset spring.

[0036] The arc-shaped adjustment plate 62 is provided with hinge holes 621 and limit holes 622 near both ends. Figure 5 The hinge hole 621 is hinged to the front end of the disc brake mounting plate 5. Specifically, the hinge hole 621 is a threaded hole, and the limit hole 622 is a through hole. The front end of the disc brake mounting plate 5 is hinged to the arc-shaped adjustment plate 62 through a screw rod. The front end of the disc brake mounting plate 5 is provided with a threaded hole corresponding to the screw rod. The threaded screw rod and the hinge hole 621 are used to realize the hinge, which is more stable.

[0037] The limiting mechanism 7 is arranged at the middle of the bottom edge of the disc brake mounting plate 5, and is used to cooperate with the limiting hole 622 to achieve the limiting of the disc brake 6. Specifically, Figure 7 When the locking cam 72 is in the state of being moved forward, the locking cam 72 is in the state of being moved forward, and the locking cam 72 is in the state of being moved forward, so that the locking cam 72 can be locked in the locking cam 72 by the locking cam 73.

[0038] In actual application, the two rear wheels 3 are both provided with the rear wheel limiting structure of the wheelchair with detachable rear wheels of the utility model, so as to realize the quick-detachable double disc brake structure of the wheelchair.

[0039] Working principle: the disc brake 4 is braked by the disc brake 6, thereby braking the two rear wheels 3. When the rear wheel 3 needs to be removed, just pull the limit pin 72 of the limit mechanism 7 to disengage the limit pin 72 from the limit hole 622 of the arc-shaped adjustment plate 62, and then adjust the position of the disc brake 6 to disengage the disc brake 4 from the disc brake 6, so that the limit of the disc brake 6 on the disc brake 4 can be released, and then the limit on the rear wheel 3 is released, so that the rear wheel 3 can be easily removed from the non-drive rear axle 1. When the wheelchair needs to be used, follow the above-mentioned disassembly steps and reverse the operation to install the rear wheel 3 back, which is convenient and quick.

[0040] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A rear wheel limiting structure for a wheelchair with a rear brake and a detachable rear wheel, characterized in that: include: No drive rear axle (1); A rear wheel (3) is movably plugged into the end of the non-drive rear axle (1) through a half shaft (2); a bearing is provided at the center of the rear wheel (3); one end of the half shaft (2) is inserted into the inner ring of the bearing, and the other end is inserted into the non-drive rear axle (1); a disc brake (4) is coaxially provided on one side of the rear wheel (3) close to the non-drive rear axle (1) and is synchronized with the rear wheel (3); A disc brake mounting plate (5) with one end fixedly mounted on the end of the non-drive rear axle (1) and the other end extending forward, the disc brake mounting plate (5) is respectively mounted with a disc brake (6) for achieving the limiting and braking of the rear wheel (3), the disc brake (6) comprising a disc brake body (61) for braking in cooperation with the disc brake disc (4) and an arc-shaped adjustment plate (62) arranged on the outer ring of the disc brake body (61), the arc-shaped adjustment plate (62) is respectively provided with a hinge hole (621) and a limiting hole (622) near the two ends, and the hinge hole (621) is hinged to the front end of the disc brake mounting plate (5); A limiting mechanism (7) is arranged at the middle of the bottom edge of the disc brake mounting plate (5) and is used to cooperate with the limiting hole (622) to limit the position of the disc brake (6).

2. The rear wheel limiting structure of a wheelchair with a rear brake and a detachable rear wheel according to claim 1, characterized in that: The rear end of the disc brake mounting plate (5) is fixedly sleeved on the end of the non-drive rear axle (1); a circular hole (51) corresponding to the end of the non-drive rear axle (1) is provided on the disc brake mounting plate (5); and a locking nut (8) for fixing and limiting the disc brake mounting plate (5) is also fixedly mounted on the end of the non-drive rear axle (1) and on the outer side of the disc brake mounting plate (5).

3. The rear wheel limiting structure of a wheelchair with a rear brake and a detachable rear wheel according to claim 2, characterized in that: The end of the non-drive rear axle (1) is provided with a mounting side plate (9) for mounting a wheelchair frame, and the bottom end of the disc brake mounting plate (5) is fixedly connected to the mounting side plate (9) by bolts.

4. The rear wheel limiting structure of a wheelchair with a rear brake and a detachable rear wheel according to claim 1, characterized in that: The two ends of the arc-shaped adjustment plate (62) are respectively assembled on the disc brake body (61) via adjustment bolts, and the disc brake body (61) is provided with a pair of brake pads for engaging and braking the disc brake disc (4).

5. The rear wheel limiting structure of a wheelchair with a rear brake and a detachable rear wheel according to claim 1, characterized in that: The hinge hole (621) is a threaded hole, the limit hole (622) is a through hole, the front end of the disc brake mounting plate (5) is hinged to the arc-shaped adjustment plate (62) via a screw rod, and the front end of the disc brake mounting plate (5) is provided with a threaded hole corresponding to the screw rod.

6. The rear wheel limiting structure of a wheelchair with a rear brake and a detachable rear wheel according to claim 1, characterized in that: The limiting mechanism (7) comprises a sleeve (71), a limiting pin (72) and a spring (73); the limiting pin (72) is a variable diameter structure with one end larger than the other and a step (74) formed thereon; the openings at both ends of the sleeve (71) are adapted to the openings at both ends of the limiting pin (72); the limiting pin (72) is slidably assembled in the sleeve (71); one end of the spring (73) contacts the step (74) and the other end contacts the end of the sleeve (71).

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