CN210240373U

CN210240373U - Disc brake piece

Info

Publication number: CN210240373U
Application number: CN201920943085.5U
Authority: CN
Inventors: Xuejun Liu; 刘学军; Shunhou Dong; 董顺厚
Original assignee: Shandong Gold Phoenix Co Ltd
Current assignee: Shandong Gold Phoenix Co Ltd
Priority date: 2019-06-21
Filing date: 2019-06-21
Publication date: 2020-04-03
Anticipated expiration: 2029-06-21

Abstract

The utility model provides a disk braking piece, including disk braking piece body, disk braking piece body include installation department and braking surface, braking surface and installation department fixed connection are in the same place, are equipped with a straight flute in the middle of the braking surface, the start and end position of the left and right sides braking surface is equipped with the S type arcwall face of symmetry, S type arcwall face is including consecutive upper end chamfer, vertical section, lower extreme chamfer and horizontal segment. The utility model discloses a set up the S type arcwall face of symmetry to the braking surface left and right sides start-stop position of disc braking piece, changed the natural frequency of braking piece, improved the distribution of braking in-process braking pressure, eliminate the high frequency noise that appears when low-speed slip braking, the phenomenon that falls the material when the S type round chamfer that the braking surface edge formed simultaneously can effectually avoid colliding with has improved friction material' S resistant atress intensity of colliding with greatly, improves the quality of product and pleasing to the eye.

Description

Disc brake piece

Technical Field

The utility model relates to a motor vehicle braking system technical field especially relates to a institutional advancement's disc brake piece.

Background

In an automobile braking system, a brake pad is used as the most critical part and plays a decisive role in the quality of the braking system, the brake pad generally comprises a steel back and a friction material, when the automobile is braked, the steel back is pushed by a brake caliper, and the friction material is contacted with a brake disc, so that the aim of decelerating the automobile is fulfilled through friction.

However, during braking, a brake pad and a brake disc generate a loud noise during friction, and particularly, a high-frequency noise of 10000Hz or more is easily generated under a low-speed and low-brake pressure condition. In order to reduce high-frequency noise, manufacturers of brake pads generally adopt an inclined grinding technology, namely inclined grinding wheels are used for grinding two sides of a friction material of the brake pad, so that the contact area between the brake pad and a brake disc is reduced. Although the natural frequency and the brake pressure distribution of the brake pad can be changed through the beveling, the improvement effect on high-frequency noise is not obvious, and the edge of the brake pad material is prismatic after the beveling, so that the material is easy to collide and fall in the daily turnover and installation process, and the appearance of the material is damaged.

SUMMERY OF THE UTILITY MODEL

In view of the above prior art's shortcoming, the utility model aims to provide a disk braking piece for solve easily produce the problem that collides with in 10000Hz above high frequency noise and the daily turnover installation under the low brake pressure condition of low-speed among the prior art.

In order to achieve the above and other related objects, the utility model provides a disc braking piece, including disc braking piece body, disc braking piece body includes installation department and braking surface, the braking surface is in the same place with installation department fixed connection, process a straight flute, its characterized in that in the middle of the braking surface of disc braking piece: the starting and stopping positions of the braking surfaces on the left side and the right side of the disc type brake pad are provided with symmetrical S-shaped arc surfaces, and each S-shaped arc surface comprises an upper end chamfer, a vertical section, a lower end chamfer and a horizontal section which are sequentially connected.

Preferably, the central lines of the upper end chamfer and the lower end chamfer are parallel and form an included angle of 0-20 degrees with the central line of the braking surface.

Preferably, the upper end chamfer and the lower end chamfer are fillets, and the common tangential direction of the two chamfers is along the normal direction of the braking surface.

Preferably, the upper end chamfer is R2-R4, and the lower end chamfer is R3-R8.

Preferably, the thickness of the braking surface of the horizontal section is 2-4 mm.

Preferably, the projection area of each S-shaped arc surface accounts for 4% -8% of the area of the braking surface.

As described above, the utility model provides a pair of novel disc brake piece has following beneficial effect:

1. the disc brake pad is processed into an S-shaped arc surface, so that the contact area between the brake pad and the brake disc is reduced, the natural frequency of the brake pad is changed, the distribution of brake pressure in the braking process is improved, and high-frequency noise generated when the low-speed sliding brake is carried out is eliminated.

2. The chamfer at the upper end of the S-shaped arc surface is beneficial to smoothly and softly cutting the brake pad into the braking condition when the braking pressure fluctuates by adopting a fillet.

3. When the brake block is circulated or installed, the fillet of the S-shaped arc surface can effectively avoid the phenomenon that the material falls off when colliding, the stress state of the material when colliding is improved, the stress is concentrated by the sharp corner and is improved into the stress of the circular arc surface, the collision-resistant stress strength of the friction material is greatly improved, and the quality and the attractiveness of the product are improved.

Drawings

Fig. 1 is a schematic perspective view of a disc brake pad according to an embodiment of the present invention.

Fig. 2 is a perspective view of the disc brake pad of fig. 1 at another angle.

Fig. 3 is a top view of the disc brake pad shown in fig. 1.

Fig. 4 is a front view of the disc brake pad of fig. 1.

Description of the element reference numerals

1 mounting part

2 braking surface

3 straight groove

4S-shaped arc surface

41 upper end chamfer

42 vertical section

43 lower end chamfer

44 horizontal segment

Detailed Description

The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.

It should be understood that the structures, ratios, sizes, etc. shown in the drawings of the present specification are only used for matching with the contents disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any modification of the structures, changes of the ratio relationship or adjustment of the sizes should still fall within the scope of the present invention without affecting the functions and the achievable purposes of the present invention. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.

Referring to fig. 1 to 4, the present invention provides a disc brake pad, which includes a disc brake disc body, the disc brake disc body includes an installation portion 1 and a braking surface 2, and the braking surface 2 is fixedly connected to the installation portion 1. A straight groove 3 is arranged in the middle of the braking surface 2, symmetrical S-shaped arc surfaces 4 are arranged at the starting and stopping positions of the braking surfaces at the left side and the right side, and each S-shaped arc surface comprises an upper end chamfer 41, a vertical section 42, a lower end chamfer 43 and a horizontal section 44 which are sequentially connected. Preferably: the central lines of the upper end chamfer 41 and the lower end chamfer 43 are parallel, and form an included angle of 0-20 degrees with the central line of the braking surface, the upper end chamfer 41 and the lower end chamfer 43 are fillets, the common tangential direction of the two fillets is the normal direction of the braking surface, the upper end chamfer 41 is R2-R4, the lower end chamfer 43 is R3-R8, the thickness of the braking surface of the horizontal section is 2-4mm, and the projection area of each S-shaped arc surface accounts for 4% -8% of the area of the braking surface.

A specific embodiment is provided as an example, in this embodiment, the mounting portion 1 is a steel backing, the braking surface 2 is a friction material braking surface, and the friction material braking surface 2 is fixed on the steel backing 1. The middle of the braking surface 2 of the brake pad is provided with a straight groove 3 with the depth of 7mm and the width of 2.5mm, the starting and stopping positions of the braking surfaces on the left side and the right side are provided with symmetrical S-shaped arc surfaces 4, each S-shaped arc surface 4 consists of an upper end chamfer 41, a vertical section 42, a lower end chamfer 43 and a horizontal section 44 which are sequentially connected, the central lines of the upper end chamfer 41 and the lower end chamfer 43 are parallel, the included angle between the central lines and the braking surfaces is 15 degrees, the upper end chamfer 41 and the lower end chamfer 43 are both round corners, the common tangential direction of the two chamfers is the normal direction of the braking surfaces, the upper end chamfer 41 is R2, the lower end chamfer 43 is R5, the thickness of the horizontal section of the S-shaped arc surfaces is 3mm, and the projection area of each S.

A test program is written according to the low-speed and low-pressure braking conditions, and the following conclusion is obtained through the performance test of the brake pad with the parameters:

frequency of noise	Before improvement (noise over 70 db)	After improvement (noise over 70 db)
			10KHz to 14KHz	11.2％	0.2％
14KHz to 16KHz	1.1％	0.0％

To sum up, the utility model provides a disc brake piece carries out S type arcwall face processing at the braking face left and right sides start-stop position, the natural frequency of brake piece has been changed, the distribution of braking pressure among the braking process has been improved, the high frequency noise that appears when carrying out the low-speed slip braking has been eliminated, S type arcwall face upper end chamfer adopts the fillet not only to be of value to when the braking pressure is undulant the brake piece can be smoothly soft cut into under the braking condition simultaneously, and the brake piece has enough to meet the need or when installing, the material that appears when can effectually avoiding colliding with falls the piece phenomenon, improve the stress state when the material collides with, concentrate the atress by the closed angle and improve to circular cambered surface atress, the resistant atress intensity of colliding with of friction material has been improved greatly, improve the quality and the pleasing to the eye of. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. The utility model provides a disk brake piece, includes disk brake piece body, disk brake piece body includes installation department and braking surface, the braking surface with installation department fixed connection is in the same place, set up a straight flute in the middle of the braking surface, its characterized in that: the start-stop positions of the left side and the right side of the braking surface are provided with symmetrical S-shaped arc surfaces, and each S-shaped arc surface comprises an upper end chamfer, a vertical section, a lower end chamfer and a horizontal section which are sequentially connected.

2. The disc brake pad of claim 1, wherein: the central lines of the upper end chamfer and the lower end chamfer are parallel, and an included angle of 0-20 degrees is formed between the central lines of the upper end chamfer and the lower end chamfer and the central line of the braking surface.

3. The disc brake pad of claim 1, wherein: the upper end chamfer with the lower extreme chamfer is the fillet and two chamfers public tangential direction is the normal direction of braking surface.

4. The disc brake pad of claim 3, wherein: the upper end chamfer is R2-R4, and the lower end chamfer is R3-R8.

5. The disc brake pad of claim 1, wherein: the thickness of the braking surface of the horizontal section is 2-4 mm.

6. The disc brake pad of claim 1, wherein: the projection area of each S-shaped arc surface accounts for 4% -8% of the total area of the braking surface.