Anti-failure structure of wheel disc brake

Abstract

The utility model discloses a wheel disc brake anti-failure structure, which relates to the technical field of electric vehicle braking, and comprises a rim and a disc brake fixing piece, the side surface of the rim is provided with a fixing part, the disc brake fixing piece is provided with a mounting hole, the mounting hole is sleeved outside the fixing part, and the disc brake fixing piece is used for fixedly connecting a disc brake disc. The cross sections of the fixing part and the mounting hole in the direction perpendicular to the wheel axle are both of a non-circular structure, and the outer side face of the fixing part is attached to the inner side face of the mounting hole. The anti-failure structure for the disc brake of the wheel can effectively prevent the disc brake from failing and is higher in safety.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicle braking, in particular to a wheel disc brake anti-failure structure. Background Art

[0002] In the existing wheel disc brake braking on an electric vehicle wheel, a fixed part is provided on the side surface of the rim. The cross-section of the fixed part in the direction perpendicular to the wheel axle is circular. A circular mounting hole matching the shape of the fixed part is provided on the disc brake fixing piece. The mounting hole of the disc brake fixing piece is sleeved on the fixed part, and the inner side surface of the mounting hole is welded to the outer side surface of the fixed part. The brake disc is fixed on the disc brake fixing piece. However, in the actual riding and use of such a product, since the fixed connection between the mounting hole and the fixed part is only formed by welding, the phenomenon of welding detachment is likely to occur, which will cause relative rotation between the disc brake fixing piece and the fixed part during braking, thereby resulting in the failure of the disc brake braking and posing a major safety hazard. Therefore, there is an urgent need for a wheel disc brake anti-failure structure that can improve the safety of the electric vehicle disc brake device. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a wheel disc brake anti-failure structure to solve the problems existing in the above-mentioned prior art and make the electric vehicle have higher safety performance.

[0004] To achieve the above purpose, the utility model provides the following solution:

[0005] The utility model provides a wheel disc brake anti-failure structure, including a rim and a disc brake fixing piece. A fixed part is provided on the side surface of the rim. A mounting hole is provided on the disc brake fixing piece. The mounting hole is sleeved outside the fixed part. The disc brake fixing piece is used for fixedly connecting the brake disc. The cross-sections of the fixed part and the mounting hole in the direction perpendicular to the wheel axle are both non-circular structures. The outer side surface of the fixed part is attached to the inner side surface of the mounting hole.

[0006] Preferably, the outer side surface in the circumferential direction of the fixed part is fixedly welded to the inner side surface in the circumferential direction of the mounting hole.

[0007] Preferably, the fixed part includes a circular part and a limiting protrusion. The limiting protrusion is fixedly arranged on the outer side surface in the circumferential direction of the circular part. The mounting hole includes a circular hole and a limiting groove. The limiting groove is arranged on the inner side surface of the circular hole. The limiting protrusion can be inserted into the limiting groove.

[0008] Preferably, the end faces at both ends of the limiting protrusion in the circumferential direction of the circular portion are first limiting faces, and the two side faces of the limiting groove in the circumferential direction of the mounting hole are second limiting faces. One of the first limiting faces at one end of the limiting protrusion is attached to one of the second limiting faces, and the other first limiting face at the other end of the limiting protrusion is attached to the other second limiting face.

[0009] Preferably, a diameter of the circular portion is a first diameter. The two first limiting faces on one limiting protrusion are symmetrically arranged with respect to the first diameter, the two second limiting faces on one limiting groove are symmetrically arranged with respect to the first diameter, the two first limiting faces on one limiting protrusion are parallel to each other, and the two second limiting faces on one limiting groove are parallel to each other.

[0010] Preferably, two limiting protrusions are provided, and two limiting grooves are also provided at positions corresponding to the two limiting protrusions.

[0011] Preferably, the two limiting protrusions are arranged oppositely, and the two limiting grooves are arranged oppositely.

[0012] The utility model has achieved the following technical effects compared with the prior art:

[0013] In the wheel disc brake anti-failure structure provided by the utility model, when braking, the brake caliper clamps the disc brake. Since the cross-sections of the fixing part and the mounting hole in the direction perpendicular to the wheel axle are both non-circular structures, and the outer side surface of the fixing part and the inner side surface of the mounting hole are in contact with each other, rather than the circular mounting hole and the circular fixing part forming a socket joint as in the prior art, although there is a tendency of relative rotation between the fixing part and the disc brake fixing piece, relative rotation will not occur. Moreover, compared with the welding form, only when the fixing part is damaged will the braking fail, and the overall safety is stronger. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0015] Figure 1 It is a side view of the wheel rim in the wheel disc brake anti-failure structure provided by the present utility model;

[0016] In the figure: 1 - Rim, 11 - Fixed part, 12 - Circular part, 13 - Limit projection, 131 - First limit surface, 2 - Disc brake fixing piece, 21 - Mounting hole, 22 - Circular hole, 23 - Limit groove, 231 - Second limit surface. Detailed implementation

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0018] The purpose of the present invention is to provide a wheel disc brake anti-failure structure to solve the problems existing in the above-mentioned prior art and make the safety performance of electric vehicles higher.

[0019] To make the above-mentioned objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0020] The present invention provides a wheel disc brake anti-failure structure, as Figure 1 shown, including a rim 1 and a disc brake fixing piece 2. The side of the rim 1 has a fixed part 11, and a mounting hole 21 is provided on the disc brake fixing piece 2. The mounting hole 21 is sleeved outside the fixed part 11. The cross-sections of the fixed part 11 and the mounting hole 21 in the direction perpendicular to the wheel axle are both non-circular structures, and the outer side surface of the fixed part 11 is in contact with the inner side surface of the mounting hole 21.

[0021] In the wheel disc brake anti-failure structure provided by the present invention, when braking, the brake caliper clamps the disc brake. Since the cross-sections of the fixed part 11 and the mounting hole 21 in the direction perpendicular to the wheel axle are both non-circular structures, and the outer side surface of the fixed part 11 is in contact with the inner side surface of the mounting hole 21, it is not the socket formed by the circular mounting hole 21 and the circular fixed part 11 in the prior art. Although there is a tendency of relative rotation between the fixed part 11 and the disc brake fixing piece 2, relative rotation will not occur. Moreover, compared with the form of welding the fixed part 11 and the mounting hole 21, only when the fixed part 11 is damaged will the braking fail, and the overall safety is stronger.

[0022] In a preferred implementation manner of this first embodiment, the outer side surface of the fixed part 11 in the circumferential direction is fixedly welded to the inner side surface of the mounting hole 21 in the circumferential direction. On the basis of the non-circular fixed part 11 and the mounting hole 21 forming a socket and then being fixedly welded, double protection can be formed, the connection is more firm, and thus the safety performance is further enhanced.

[0023] In a preferred embodiment of the first embodiment, the fixing portion 11 includes a circular portion 12 and a limiting protrusion 13. The limiting protrusion 13 is fixedly arranged on the outer side surface of the circumferential direction of the circular portion 12. The mounting hole 21 includes a circular hole 22 and a limiting groove 23. The limiting groove 23 is arranged on the inner side surface of the circular hole 22, and the limiting protrusion 13 can be inserted into the limiting groove 23. The non-circular fixing portion 11 is jointly formed by the limiting protrusion 13 and the circular portion 12. The structure in which the limiting protrusion 13 and the limiting groove 23 cooperate with each other can facilitate the installation of the staff during the production process.

[0024] It should be noted that for the wheel disc brake anti-failure structure provided by the present utility model, the shapes of the fixing portion 11 and the mounting hole 21 have various forms. For example, the cross-section of the fixing portion 11 in the direction parallel to the wheel axle can be set as a polygon (square, rectangle, triangle, etc.), and the mounting hole 21 can be set as a figure with the same cross-section as the fixing portion 11 and sleeved with the fixing portion 11, which can also play a role in restricting the relative rotation between the disc brake fixing piece 2 and the fixing portion 11.

[0025] In a preferred embodiment of the first embodiment, the end surfaces at both ends of the limiting protrusion 13 in the circumferential direction of the circular portion 12 are both first limiting surfaces 131, and the two side surfaces of the limiting groove 23 in the circumferential direction of the mounting hole 21 are both second limiting surfaces 231. One first limiting surface 131 at one end of the limiting protrusion 13 is attached to one second limiting surface 231, and the other first limiting surface 131 at the other end of the limiting protrusion 13 is attached to the other second limiting surface 231. The two first limiting surfaces 131 are respectively attached to the two second limiting surfaces 231, which can limit the disc brake fixing piece 2 in two directions by the fixing protrusion, thereby further enhancing the safety performance of the disc brake structure.

[0026] In a preferred embodiment of the first embodiment, a diameter of the circular portion 12 is the first diameter. The two first limiting surfaces 131 on one limiting protrusion 13 are symmetrically arranged with respect to the first diameter, and the two second limiting surfaces 231 on one limiting groove 23 are symmetrically arranged with respect to the first diameter. The two first limiting surfaces 131 on one limiting protrusion 13 are parallel to each other, and the two second limiting surfaces 231 on one limiting groove 23 are parallel to each other. Compared with the form in which the two first limiting surfaces 131 on one limiting protrusion 13 have an included angle, the setting method in which the two first limiting surfaces 131 on one limiting protrusion 13 are parallel to each other can make the force on the first limiting surface 131 and the second limiting surface 231 more uniform, thereby improving the safety performance.

[0027] In order to further improve the reliability of the disc brake structure, in a preferred embodiment of the first embodiment, two limiting protrusions 13 are provided, and two limiting grooves 23 are also provided at positions corresponding to the two limiting protrusions 13.

[0028] In a preferred embodiment of the first embodiment of the present invention, the two limiting protrusions 13 are arranged oppositely, and the two limiting grooves 23 are arranged oppositely.

[0029] In the present utility model, specific examples are used to illustrate the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A wheel disc brake failure prevention structure, comprising a rim and a disc brake fixing plate, wherein the side of the rim has a fixing portion, the disc brake fixing plate is provided with a mounting hole, the mounting hole is sleeved outside the fixing portion, and the disc brake fixing plate is used for fixing and connecting a disc brake disc, characterized in that: The cross sections of the fixing portion and the mounting hole in a direction perpendicular to the wheel axle are both non-circular structures, and the outer side surface of the fixing portion fits with the inner side surface of the mounting hole.

2. The wheel disc brake failure prevention structure according to claim 1, characterized in that: The outer side surface of the fixing portion in the circumferential direction is fixed by welding to the inner side surface of the mounting hole in the circumferential direction.

3. The wheel disc brake failure prevention structure according to claim 1 or 2, characterized in that: The fixing portion includes a circular portion and a limiting protrusion, wherein the limiting protrusion is fixedly arranged on the circumferential outer side surface of the circular portion; the mounting hole includes a circular hole and a limiting groove, wherein the limiting groove is arranged on the inner side surface of the circular hole, and the limiting protrusion can be inserted into the limiting groove.

4. The wheel disc brake failure prevention structure according to claim 3, characterized in that: The end faces of the limiting protrusion at both ends in the circumferential direction of the circular part are both first limiting surfaces, and the two side faces of the limiting groove in the circumferential direction of the mounting hole are both second limiting surfaces. One of the first limiting surfaces at one end of the limiting protrusion is fitted with one of the second limiting surfaces, and another of the first limiting surfaces at the other end of the limiting protrusion is fitted with another of the second limiting surfaces.

5. The wheel disc brake failure prevention structure according to claim 4, characterized in that: One diameter of the circular portion is the first diameter, the two first limiting surfaces on one of the limiting protrusions are symmetrically arranged about the first diameter, the two second limiting surfaces on one of the limiting grooves are symmetrically arranged about the first diameter, the two first limiting surfaces on one of the limiting protrusions are parallel to each other, and the two second limiting surfaces on one of the limiting grooves are parallel to each other.

6. The wheel disc brake failure prevention structure according to claim 4, characterized in that: The limiting protrusions are provided with two, and the limiting grooves are also provided with two at positions corresponding to the two limiting protrusions.

7. The wheel disc brake failure prevention structure according to claim 6, characterized in that: The two limiting protrusions are arranged opposite to each other, and the two limiting grooves are arranged opposite to each other.

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