CN215762939U

CN215762939U - Brake pad

Info

Publication number: CN215762939U
Application number: CN202122408390.4U
Authority: CN
Inventors: 梁金豹; 张家富; 吴雷; 王秀飞; 王宇; 宋嘉洁
Original assignee: Beijing Youcai Baimu Aviation Equipment Co ltd
Current assignee: Beijing Youcai Baimu Aviation Equipment Co ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2022-02-08
Anticipated expiration: 2031-09-30

Abstract

The present invention provides a brake pad, comprising: a friction body, one side of which is provided with a first arc bulge and is provided with a connecting hole penetrating through the first arc bulge; the surface of the steel back opposite to the friction body is provided with a first recess matched with the first arc bulge in shape, and the steel back is provided with a through hole communicated with the first recess; the two ends of the connecting piece are respectively inserted and fixed with the through hole and the connecting hole; the elastic piece is sleeved on the connecting piece and elastically abutted between the first arc bulge and the first recess. The brake pad can improve the effective friction area between the brake pad and a brake disc in the working process, has strong heat dissipation capability and can effectively reduce the phenomena of cracks, falling blocks, defects, performance decline and the like caused by the high-temperature and high-pressure action of the brake pad friction body.

Description

Brake pad

Technical Field

The utility model relates to the technical field of train braking, in particular to a brake pad.

Background

With the trend of high-speed development of trains, higher requirements are put on train braking. The brake pad for the train generally adopts a brake pad structure fixedly connected by rivets, and the shape of a friction block is generally circular, hexagonal, quadrilateral or triangular, when the train brakes at a high speed, the effective friction area between the brake pad and a brake disc is about 90 percent, and 100 percent of attachment is difficult to realize, so that the brake pad is easy to cause the phenomena of crack, block falling, defect and the like of the brake pad friction block due to the combined action of alternating stress and high thermal load bearing during high-speed braking, and the surface of the brake disc is easy to have high temperature points, generate thermal stress concentration, generate thermal cracks and influence the braking force efficiency of a high-speed motor train unit.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the utility model mainly aims to provide a brake pad which can improve the effective friction area between the brake pad and a brake disc in the working process, has strong heat dissipation capability and can effectively reduce the phenomena of cracks, falling blocks, defects, performance decline and the like of a brake pad friction body under the action of high temperature and high pressure.

To achieve the above object, the present invention provides a brake pad.

This brake pad includes:

the friction body is provided with a first arc bulge on one side surface and a connecting hole penetrating through the first arc bulge;

the surface of the steel back opposite to the friction body is provided with a first recess matched with the first arc bulge in shape, and the steel back is provided with a through hole communicated with the first recess;

the two ends of the connecting piece are respectively inserted and fixed with the through hole and the connecting hole;

and the elastic part is sleeved on the connecting part and is elastically abutted between the first arc bulge and the first recess.

Further, the radius of curvature of the first arc protrusion is smaller than that of the first recess.

Furthermore, the elastic piece is an elastic gasket, a second recess is arranged on one side surface of the elastic piece, which is abutted against the first arc protrusion, and the second recess is matched with the first arc protrusion.

Furthermore, a second arc bulge is arranged on one side surface of the elastic gasket, which is opposite to the second recess, and is matched with the first recess; the maximum outer diameter of the first recess is larger than the maximum outer diameter of the elastic washer.

Further, the elastic member is a disc spring.

Furthermore, the connecting hole is provided with an orifice chamfer, one end of the connecting piece penetrates through the connecting hole and is matched with the orifice chamfer, and the other end of the connecting piece is inserted into the through hole.

Furthermore, the connecting piece is an elastic connecting piece, and one end part of the elastic connecting piece is provided with a conical surface and is matched and abutted with the orifice chamfer; the other end of the elastic connecting piece is in a cone frustum shape and is inserted into the through hole, and the end part of the other end of the elastic connecting piece is provided with a cross open slot.

Further, the friction body comprises a powder layer and a back plate, the powder layer and the back plate are integrally sintered, and the first arc protrusion is arranged on the back plate.

Furthermore, the cross-sectional area of the friction body is an eccentric hexagon, the first arc protrusion is arranged in the center of the surface of the friction body, and the connecting hole is formed in the center of the first arc protrusion.

Furthermore, the surface of the steel back is provided with an anti-rotation bulge for preventing the friction body from rotating in the braking process.

The brake pad can improve the effective friction area, and avoids the phenomena of crack, block falling, defect and the like of a brake pad friction body due to the improvement of the capacity of bearing alternating stress and high thermal load in high-speed braking; the brake disc prevents the surface of the brake disc from generating high temperature points, thermal stress concentration and thermal cracks, and influences the braking force efficiency of the high-speed motor train unit.

The brake pad has low manufacturing cost, greatly improves the production efficiency, and improves the structural stability and safety of the floating brake pad.

The brake pad is characterized in that the arc convex surface arranged at the centroid position of the bottom of the friction body and the arc concave arranged on the elastic member are set to be an equal arc 1, and the arc convex surface arranged at the bottom of the elastic member and the arc concave arranged on the steel back are set to be an equal arc 2. The circle centers of the arc 1 and the arc 2 are different, the arc 1 and the arc 2 are matched to achieve the purpose of floating, and the larger the difference value between the circle centers of the arc 1 and the arc 2 is, the larger the floating space is.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

FIG. 1 is a perspective view of a brake pad provided in accordance with an embodiment of the present invention;

FIG. 2 is a front view of a brake pad provided in accordance with an embodiment of the present invention;

FIG. 3 is a rear view of a brake pad provided in accordance with an embodiment of the present invention;

FIG. 4 is a top view of a steel backing provided in accordance with an embodiment of the present invention;

FIG. 5 is a side view of a steel backing provided by an embodiment of the present invention;

FIG. 6 is a cross-sectional view of a brake pad provided in accordance with one embodiment of the present invention;

FIG. 7 is a cross-sectional view of a brake pad provided in accordance with another embodiment of the present invention;

FIG. 8 is a perspective view of a connector provided in accordance with an embodiment of the present invention;

FIG. 9 is a longitudinal cross-sectional view of a friction body provided in accordance with an embodiment of the present invention;

fig. 10 is a longitudinal sectional view of an elastic pad provided in an embodiment of the present invention.

In the figure:

1. a friction body; 2. a steel backing; 3. a connecting member; 4. an elastic member;

11. a first arc protrusion; 12. a back plate; 13. a powder layer; 111. connecting holes;

21. a through hole; 22. a first recess; 23. an anti-rotation protrusion;

41. a second recess; 42. and the second arc bulge.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 to 10, the brake pad provided by the embodiment includes a friction body 1, wherein a first arc protrusion 11 is disposed on one side surface of the friction body 1, and a connection hole 111 is disposed through the first arc protrusion 11; the brake pad further comprises a steel back 2, a first recess 22 matched with the first arc bulge 11 in shape is arranged on the surface of the steel back 2 opposite to the friction body 1, and a through hole 21 communicated with the first recess 22 is formed in the steel back 2; the brake pad also comprises a connecting piece 3, and two ends of the connecting piece 3 are respectively inserted and fixed with the through hole 21 and the connecting hole 111; the brake pad further comprises an elastic member 4, wherein the elastic member 4 is sleeved on the connecting member 3 and elastically abuts between the first arc-shaped protrusion 11 and the first recess 22.

The friction body 1 and the steel back 2 of the brake pad are in contact assembly by adopting a mode of abutting an elastic piece 4, and simultaneously the friction body 1 and the steel back 2 are connected through the insertion fit of the connecting piece 3 and the through hole 21 and the connecting hole 111, therefore, the elastic member 4 between the friction body 1 and the steel back 2 can stably form elastic abutting force between the friction body 1 and the steel back 2, the abutting force can lead the surfaces of the friction body 1 and the steel back 2 which are matched and opposite to each other to form a changeable gap, the size of the gap is adjusted by the elastic abutting force formed by the elastic element 4 between the friction body 1 and the steel back 2, the friction body 1 can float up and down relative to the steel back 2 through the elastic compression and elastic reset of the elastic piece 4, and then the clearance is automatically adjusted along with the elastic compression and elastic reset of the elastic part 4, thereby ensuring the effective friction area of the brake pad and the brake disc.

In the present invention, the circular arc protrusion, that is, the circular arc protrusion, may be understood as a recess having a circular arc surface since the shape of the recess matches with the circular arc protrusion.

In one embodiment of the present invention, the first recess 22 and the first arc protrusion 11 have a gap of 0.8 to 1.0mm, which is the same as the maximum pressing amount of the elastic member 4.

In order to further realize the self-adjusting floating function and automatic adjustment of the friction body 1 and ensure the effective friction area of the brake pad, the curvature radius of the first arc bulge 11 is smaller than the curvature radius of the first recess 22, the circle center corresponding to the arc surface of the first arc bulge 11 is different from the circle center corresponding to the arc surface of the first recess 22, so that the swing centers of the friction body 1 and the elastic element 4 are different, and the larger the difference value between the circle centers of the first recess 22 and the first arc bulge 11 is, the larger the floating space is, which is also the floating design principle of the friction body 1 in the utility model.

In the present invention, the elastic member 4 may be an elastic pad, and as shown in fig. 6 and 10, a second recess 41 is disposed on a side surface of the elastic pad abutting against the first arc protrusion 11, and the second recess 41 is matched with the first arc protrusion 11. The second recess 41 of the elastic pad has an arc size of arc 1, and cooperates with the first arc protrusion 11 to enable the friction body 1 to swing along the arc 1.

As shown in fig. 10, a side surface of the elastic pad opposite to the second recess 41 is provided with a second arc protrusion 42, and is matched with the first recess 22; and the maximum outer diameter of the first recess 22 is larger than that of the elastic pad to limit the swing range of the elastic pad. The first recess 22 formed in the steel backing 2 has an arc size of arc 2, and is matched with the second arc protrusion 42 of the elastic gasket, so that the elastic gasket swings along the arc 2. Moreover, the center of the swinging circle of the friction body 1 along the arc 1 is different from the center of the swinging circle of the elastic element 4 along the arc 2, so that the self-adjusting floating function and the automatic adjustment of the friction body 1 are realized, and the effective friction area of the brake pad is ensured.

The elastic member 4 may have an elastic effect, and may be configured to abut between the friction body 1 and the steel back 2 to form an elastic action, thereby achieving a floating structure, and for example, the elastic member 4 may be made of a material having an elastic effect or configured to have an elastic effect. In one embodiment, the resilient member 4 may also be a disc spring, as shown in fig. 7. The disc spring is different from the traditional spring, has special function, and is mainly characterized by large load, short stroke, small required space, convenient combination and use, easy maintenance and replacement and high economic safety. It is suitable for the precise heavy machinery with small space and large load. The optimal application range of the compression stroke is between 10% and 75% of the maximum compression stroke.

In the utility model, the friction body 1 is provided with a connecting hole 111, so that the friction body 1 can be conveniently fixed on the steel back 2 through the connecting piece 3. As shown in fig. 9, the friction body 1 includes a back plate 12 and a powder layer 13, the powder layer 13 and the back plate 12 are integrally sintered, that is, can be formed together by sintering, the first arc protrusion 11 is disposed on the back plate 12, and the connection hole 111 is disposed through the back plate 12.

As shown in fig. 1, the cross-sectional area of the friction body 1 is an eccentric hexagon, so as to maximize the utilization of the overall dimension space of the brake pad to increase the friction area, the first circular arc protrusion 11 is disposed at the center of the surface of the friction body 1, and the connection hole 111 is opened at the center of the first circular arc protrusion 11, i.e., at the centroid of the exterior of the friction body 1.

As shown in fig. 6 and 7, the connection hole 111 is provided with an orifice chamfer, one end of the connecting member 3 passes through the connection hole 111 and is matched with the orifice chamfer, so that one end of the connecting member 3 is clamped and fixed with the connection hole 111, and the other end of the connecting member 3 is inserted and fixed with the through hole 21. The size of the through hole 21 is smaller than the maximum diameter of the connecting end in the connecting piece 3, so that the aim of preventing the connecting piece 3 from jumping out is fulfilled.

In the utility model, the connecting piece 3 is an elastic connecting piece which is in an elastic deformation state after penetrating through the through hole 21 on the steel back 2, connects the friction body 1, the elastic piece 4 and the steel back 2 together and provides pretightening force. Wherein, one end of the elastic connecting piece is provided with a conical surface and is matched and abutted with the orifice chamfer; wherein the included angle of the conical surface is 5-10 degrees. The other end of the elastic connecting piece is in a cone frustum shape and is inserted into the through hole, and the end part of the other end of the elastic connecting piece is provided with a cross open slot which is used for clamping and preventing the elastic connecting piece from being separated during installation.

In addition, the elastic connecting piece can be an elastic nail, wherein the elastic nail can be made of spring steel or stainless steel.

As shown in fig. 8, the head of the elastic nail is provided with a conical surface and is matched and abutted with the chamfer of the hole; the elastic nail has a circular truncated cone shape and is fixedly inserted into the through hole 21, and the end of the nail rod is provided with a cross-shaped open slot.

Referring to fig. 4 and 5, the surface of the steel backing 2 is provided with anti-rotation protrusions 23 for preventing the friction body 1 from rotating during braking. Wherein, the back of the steel back 2 is provided with a dovetail groove for matching with other structures, thereby fixing the steel back 2. The arrangement position and number of the rotation preventing projections 23 are not particularly limited, and may be selected, for example, according to the actual structural design. In one embodiment, three anti-rotation protrusions 23 are provided on the surface of each steel back 2, and the three anti-rotation protrusions 23 form a triangular fixation, as shown in fig. 4.

In the utility model, the floating brake pad consists of 2 steel backs 2. Each steel backing 2 is matched with 10 friction bodies 1, and the 10 friction bodies 1 are uniformly arranged on the steel backing 2. In addition, the number of the friction bodies 1 can be changed into other numbers according to the relative sizes of the steel back 2 and the friction bodies 1, as long as the effective friction area can be met and the sufficient braking effect can be achieved, which is not described herein again.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A brake pad, comprising:

2. The brake pad of claim 1, wherein the radius of curvature of the first rounded protrusion is less than the radius of curvature of the first recess.

3. The brake pad according to claim 1 or 2, wherein the resilient member is an elastic pad, and a second recess is provided on a side surface of the resilient pad abutting against the first arc protrusion, and the second recess is engaged with the first arc protrusion.

4. The brake pad of claim 3, wherein a side of the resilient pad opposite the second recess is provided with a second rounded protrusion, and engages with the first recess; the maximum outer diameter of the first recess is larger than the maximum outer diameter of the elastic washer.

5. The brake pad of claim 1, wherein the resilient member is a disc spring.

6. The brake pad of claim 1, wherein the connection hole is provided with an orifice chamfer, one end of the connecting member passes through the connection hole and is matched with the orifice chamfer, and the other end is inserted into the through hole.

7. The brake pad of claim 6, wherein the connecting member is an elastic connecting member, and one end of the elastic connecting member is provided with a tapered surface and is in matched abutting contact with the chamfer of the opening; the other end of the elastic connecting piece is in a cone frustum shape and is inserted into the through hole, and the end part of the other end of the elastic connecting piece is provided with a cross open slot.

8. The brake pad of claim 1, wherein the friction body comprises a powder layer and a back plate, the powder layer is integrally sintered with the back plate, and the first arc protrusion is disposed on the back plate.

9. The brake pad according to claim 1 or 8, wherein the cross-sectional area of the friction body is an eccentric hexagon, the first circular arc protrusion is disposed at the center of the surface of the friction body, and the connection hole is opened at the center of the first circular arc protrusion.

10. The brake pad of claim 1, wherein the steel backing has anti-rotation protrusions on its surface for preventing rotation of the friction body during braking.