CN217271572U

CN217271572U - Brake pad

Info

Publication number: CN217271572U
Application number: CN202221231209.5U
Authority: CN
Inventors: 徐熙庆; 刘壮; 罗健
Original assignee: Knorr Bremse Systems for Rail Vehicles Suzhou Co Ltd
Current assignee: Knorr Bremse Systems for Rail Vehicles Suzhou Co Ltd
Priority date: 2022-05-20
Filing date: 2022-05-20
Publication date: 2022-08-23
Anticipated expiration: 2032-05-20

Abstract

The utility model discloses a brake pad, include: the friction component comprises a support plate, a plurality of friction components and a fastening component, wherein the friction components and the fastening component are arranged on the support plate; the fastening assembly comprises a pin shaft penetrating through the friction assembly and the support plate, a crimping part arranged at one end of the pin shaft and a fastening piece; the friction assembly comprises a friction piece and a back plate, wherein the friction piece is provided with a friction piece perforation matched with the pin shaft and a pressure-bearing part matched with the press-connection part; the back plate is provided with a back plate through hole matched with the pin shaft; the fastener sets up the one side that deviates from friction components in the backup pad, and the fastener cooperates with the round pin axle in order to press from both sides the backplate clamping position between friction spare and backup pad. The utility model discloses a fastening components will divide the body the friction piece with the backplate is pressed and is hugged closely and is in the same place to compress tightly the location in the backup pad with the friction subassembly that friction piece and backplate constitute under fastening components's effect simultaneously, the convenient installation that has realized the friction piece is fixed, makes the assembly also more simple.

Description

Brake pad

Technical Field

The utility model relates to a train braking accessory, especially brake block.

Background

High-speed trains usually employ a disc brake system, in which a brake disc is mounted on an axle or on a side of a wheel web, two brake pads made of synthetic material are pressed against the side of the brake disc by a brake caliper, and the train stops moving forward by generating a braking force through friction. The braking mode can greatly reduce the thermal load and mechanical abrasion of the wheel tread because the acting force is not on the wheel tread. In addition, the disc brake has large friction area, stable brake and good brake effect.

The core component of the high-speed train mechanical braking system is a friction pair consisting of a brake disc and a brake pad. The working main body of the brake pad is a friction piece which is made of friction material through a powder metallurgy process, so that the brake pad has high compression strength, bending strength and shearing strength, and excellent wear resistance and heat dissipation.

In order to facilitate the installation and fixation of the friction member, the friction member is generally disposed on the back plate, the back plate and the friction member form friction particles, and the friction particles are then installed and fixed on the support plate of the brake pad through the fastener on the back plate.

In the prior art, the friction member is generally formed on the back plate in an adhesion mode, the back plate and the friction member are required to meet the condition of mutual adhesion in the process, the mode restricts the selection of materials of the back plate and the friction member, and the manufacturing process is relatively complex.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a brake pad to solve not enough among the prior art, its convenient realization the installation of friction piece is fixed, makes the assembly also more simple.

The utility model provides a brake pad, include: the friction component comprises a support plate, a plurality of friction components and a fastening component, wherein the friction components and the fastening component are arranged on the support plate;

the fastening assembly comprises a pin shaft penetrating through the friction assembly and the supporting plate, a crimping part arranged at one end of the pin shaft and a fastening part;

the friction assembly comprises a friction piece and a back plate, wherein a friction piece through hole matched with the pin shaft and a bearing part matched with the press-connection part are arranged on the friction piece; the back plate is provided with a back plate through hole matched with the pin shaft;

the fastener is arranged on one side, which is far away from the friction component, of the supporting plate, and the fastener is matched with the pin shaft so as to clamp and position the back plate between the friction piece and the supporting plate.

Further, the back plate through hole is opposite to the friction piece through hole, and the size of the back plate through hole is smaller than that of the friction piece through hole; a back plate limiting part is arranged on the back plate opposite to the friction piece through hole; and the pin shaft is provided with an axial limiting part which is used for abutting against the back plate limiting part.

Further, the pin shaft comprises a first shaft body and a second shaft body which are coaxially arranged, the crimping part is arranged on one side, away from the second shaft body, of the first shaft body, the first shaft body is matched with the friction part through hole, and the second shaft body is matched with the back plate through hole;

the size of the first shaft body is larger than that of the second shaft body so that a limiting table located beside the second shaft body is formed on the first shaft body, and the axial limiting portion is arranged on the limiting table.

Further, the size of the first shaft body in the axial direction is smaller than the hole depth of the friction piece through hole so as to form a gap part between the axial limiting part and the back plate limiting part.

Furthermore, the friction piece is provided with a positioning groove which is arranged to face away from the opening of the back plate, the friction piece through hole is communicated with the positioning groove and is provided with an inlet positioned at the bottom of the positioning groove, and the pressure bearing part is arranged at the bottom of the positioning groove and is positioned beside the inlet; the pressing part is positioned in the positioning groove and abuts against the pressing part.

Further, the friction component is also provided with a reinforcing piece arranged on the friction piece, the reinforcing piece comprises a reinforcing plate arranged on the bearing portion and a reinforcing ring arranged on the side wall of the friction piece through hole, and the crimping portion is abutted on the reinforcing plate.

Furthermore, the reinforcing ring and the reinforcing plate are integrally formed, and the reinforcing piece is further provided with an embedded part which is arranged on the reinforcing ring and extends into the friction piece.

Furthermore, one side of the back plate, which is far away from the friction piece, is provided with a hemispherical protrusion, the hemispherical protrusion is arranged at the center of the back plate, and the back plate through hole is arranged at the center of the hemispherical protrusion.

Furthermore, the brake pad is also provided with a rotary limiting component;

the rotation limiting assembly comprises a limiting groove which is arranged on the back plate and faces the opening of the friction piece, a positioning part matched with the limiting groove is formed on the friction piece, and the cross section of the positioning part is triangular, quadrangular or polygonal.

Furthermore, the brake pad is further provided with a rotary limiting assembly, the rotary limiting assembly comprises a positioning column which is arranged on the back plate and protrudes towards the direction of the friction piece, and a groove body matched with the positioning column is arranged on the friction piece.

Further, one side of the friction piece, which is far away from the back plate, forms a friction surface; the brake pad is also provided with a wear indicator arranged on the friction piece, and the wear indicator is arranged on one side of the friction piece far away from the friction surface; the wear indicator is configured to form an easily detectable mark on the rubbed object after the rubbing is performed against the rubbed object.

Further, the wear indicator may be a different color than the friction member or the wear indicator may be a fluorescent member.

Further, the friction member has a mounting groove therein that opens toward the backing plate, and the wear indicator is positioned within the mounting groove.

Further, the wear indicator includes a first wear indicating portion and a second wear indicating portion, the first wear indicating portion being closer to the friction surface than the second wear indicating portion, the first wear indicating portion and the second wear indicating portion being different colors.

Further, the first wear indicator and the second wear indicator are coaxially arranged, the size of the cross section of the first wear indicator is different from that of the cross section of the second wear indicator, and the size of the cross section of the first wear indicator is smaller than that of the cross section of the second wear indicator; the mounting groove is internally provided with a first groove body matched with the first wear indicating part and a second groove body matched with the second wear indicating part.

Compared with the prior art, the embodiment of the utility model provides a through fastening components with the friction spare of components of a whole that can function independently with the backplate pressure is hugged closely and is in the same place to compress tightly the location in the backup pad with the friction subassembly that friction spare and backplate constitute under fastening components's effect simultaneously, the convenient installation that has realized the friction spare is fixed, makes the assembly also more simple.

Drawings

Fig. 1 is an exploded view of a brake pad disclosed in an embodiment of the present invention;

FIG. 2 is a schematic view of an assembly of a brake pad disclosed in an embodiment of the present invention;

fig. 3 is an exploded view of the first friction assembly and the pin shaft of the brake pad according to the embodiment of the present invention;

fig. 4 is a schematic structural view of a pin shaft in the brake pad disclosed in the embodiment of the present invention;

fig. 5 is a schematic view illustrating the assembly of the first friction component and the pin shaft in the brake pad disclosed in the embodiment of the present invention;

FIG. 6 is an enlarged view of a portion of FIG. 5 at A;

FIG. 7 is a top view of a friction member with a reinforcement member attached to a brake pad according to an embodiment of the present invention;

FIG. 8 is a cross-sectional view taken in the direction BB in FIG. 7;

FIG. 9 is a schematic structural view of a wear indicator in a brake pad according to an embodiment of the present invention;

fig. 10 is an exploded view of the second friction assembly and the pin of the brake pad according to the embodiment of the present invention;

fig. 11 is a schematic view of an assembly structure of a second friction component and a pin shaft in a brake pad disclosed in an embodiment of the present invention;

FIG. 12 is an enlarged partial schematic view at C of FIG. 11;

fig. 13 is a schematic view of another wear indicator mounting configuration disclosed in an embodiment of the present invention;

fig. 14 is an exploded view of a first assembly structure of a third friction component and a pin shaft in the brake pad disclosed in the embodiment of the present invention;

fig. 15 is an exploded view of a second assembly structure of a third friction component and a pin shaft in the brake pad disclosed in the embodiment of the present invention;

fig. 16 is a schematic view of an assembly structure of a third friction component and a pin shaft in the brake pad disclosed in the embodiment of the present invention;

description of the reference numerals: 1-a support plate, 11-a support plate positioning groove,

2-friction component, 21-friction piece, 210-friction piece through hole, 211-bearing part, 212-positioning groove, 213-positioning part, 214-groove body, 215-friction surface, 216-mounting groove,

22-back plate, 220-back plate through hole, 221-back plate limiting part, 222-hemispherical protrusion, 223-limiting groove, 224-positioning column,

23-a reinforcing member, 231-a reinforcing plate, 232-a reinforcing ring, 233-an embedded part,

3-fastening component, 31-pin shaft, 310-axial limiting part, 311-first shaft body, 312-second shaft body, 32-crimping part, 33-fastening piece, 4-disc spring, 5-protective gasket,

6-wear indicator, 61-first wear indicator, 62-second wear indicator, 63-indicator groove.

Detailed Description

The embodiments described below by referring to the drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.

The embodiment of the utility model discloses a brake lining, this brake lining be used for high-speed train and with the brake disc cooperation of train in order to realize the brake braking of train, brake lining sets up on the braking clamp, thereby moves to the brake disc direction under the effect of braking clamp so that the friction member on the brake lining compresses tightly the laminating and realizes brake disc pivoted control on the brake disc.

In this embodiment, as shown in fig. 1 to 9, the brake pad includes: the device comprises a supporting plate 1, a plurality of friction components 2 and fastening components 3, wherein the friction components 2 and the fastening components 3 are arranged on the supporting plate 1; the fastening assembly 3 is used to arrange the friction assembly 2 on the support plate 1.

The fastening component 3 in this embodiment comprises a pin 31 penetrating through the friction component 2 and the support plate 1, a crimping part 32 arranged at one end of the pin 31 and a fastening part 33;

the friction assembly 2 comprises a friction piece 21 and a back plate 22, wherein the friction piece 21 is provided with a friction piece through hole 210 matched with the pin shaft 31 and a pressure bearing part 211 matched with the pressure bearing part 32; the press-contact part 32 is pressed and fixed on the press-contact part 211 and presses and fixes the friction piece 21 on the back plate 22; it can be understood that the back plate 22 is provided with a back plate through hole 220 adapted to the pin 31;

the fastener 33 is arranged on the side of the support plate 1 facing away from the friction component 2, and the fastener 33 cooperates with the pin 31 to clamp and position the back plate 22 between the friction member 21 and the support plate 1.

As shown in fig. 2 and 6, the fastening part 33 and the pressure-bonding part 32 are oppositely arranged on both sides of the support plate 1, after the fastening part 33 is loaded and matched with the pin 31, the pressure-bonding part 32 is abutted against the pressure-bearing part 211, the pressure-bearing part 211 is pressure-bonded and attached to the back plate 22, and the back plate 22 is press-positioned on the support plate 1 under the left and right sides of the pressure-bonding part 32.

As shown in fig. 1 and fig. 2, the fastening member 33 may be an installation clamp spring, the pin 31 is provided with a pin groove adapted to the installation clamp spring, and the installation clamp spring is clamped in the pin groove.

Furthermore, the brake pad further comprises a disc spring 4 and a protective pad 5 which are arranged between the back plate 22 and the support plate 1, a support plate positioning groove 11 which is arranged towards the opening of the friction component 2 is formed in the support plate 1, the support plate positioning groove 11 is matched with the disc spring 4, and the disc spring 4 is positioned in the support plate positioning groove 11.

One end of the cup spring 4 may be directly against the back plate 22, although in another embodiment a protective spacer 5 may be provided between the cup spring 4 and the back plate 22.

In the embodiment, the fastening component 3 presses the friction piece 21 and the back plate 22 which are separated, tightly, and simultaneously presses the friction component 2 consisting of the friction piece 21 and the back plate 22 to be positioned on the support plate 1 under the action of the fastening component 3, so that the friction piece 21 is conveniently mounted and fixed through the structure, and the assembly is simpler.

It can be understood that, in order to enable the pin 31 to penetrate through the friction assembly 2, the back plate through hole 220 is opposite to the friction member through hole 210, and the size of the back plate through hole 220 is smaller than that of the friction member through hole 210; a back plate limiting part 221 is arranged on the back plate 22 opposite to the friction piece through hole 210; the pin 31 is provided with an axial limiting portion 310 for abutting against the back plate limiting portion 221.

In the embodiment, the friction member 21 is damaged or lost due to an unexpected condition, as shown in fig. 6, a gap is formed at a position where the friction member 21 is originally clamped between the crimping portion 32 and the back plate after the friction member 21 falls off, and the existence of the gap easily causes the pin 31 to shake in the axial direction.

In order to avoid the above problem, as shown in fig. 6, a back plate limiting portion 221 is disposed on the back plate 22, and an axial limiting portion 310 adapted to the back plate limiting portion 221 is disposed on the pin 31, where the axial limiting portion 310 is configured to abut against the back plate limiting portion 221 to prevent the pin 31 from moving in the axial direction.

As shown in fig. 4, the pin 31 includes a first shaft body 311 and a second shaft body 312 coaxially arranged, the pressure-bonding part 32 is arranged on a side of the first shaft body 311 away from the second shaft body 312, the pressure-bonding part 32 is a pressure-bonding plate, a cross-sectional dimension of the pressure-bonding plate is larger than that of the first shaft body 311, and the pressure-bonding plate presses and fixes part of the friction member 21 on the back plate.

The pin shaft 3 further has a third shaft body disposed on the second shaft body 312, and the pin shaft groove is disposed on the third shaft body.

The first shaft 311 is fitted into the friction member through hole 210, and the second shaft 312 is fitted into the back plate through hole 220; the second shaft 312 and the back plate through hole 220 may be in an interference fit, and in order to facilitate the assembly of the back plate 22 and the second shaft 312, the diameter of the third shaft is smaller than that of the second shaft 312.

The cross-sectional dimension of the first shaft body 311 is greater than the cross-sectional dimension of the second shaft body 312 so as to form a limit table located beside the second shaft body 312 on the first shaft body 311, and the axial limit portion 310 is arranged on the limit table.

As shown in fig. 6, the dimension of the first shaft 311 in the axial direction is smaller than the hole depth of the friction member through hole 210 to form a gap portion between the axial direction limiting portion 310 and the back plate limiting portion 221.

The gap can make the press-connecting part 32 press and fix the friction member 21 on the back plate 22 better, and if the axial limiting part 310 abuts directly on the back plate limiting part 221, the press and fixation of the press-connecting part 32 on the friction member 21 will be affected.

The friction piece 21 can be compressed when being elastically deformed because of elastic deformation generated after crimping, and the existence of the gap part can offset the compression amount, so that the crimping acting force applied to the friction piece 21 by the crimping part 32 is completely transmitted to the back plate 22, and the compression positioning of the friction piece 21 is better realized.

It can be understood that the size of the gap portion is small, so that the axial limiting portion 310 does not move a large distance to achieve the contact with the back plate limiting portion 221 after the friction member 21 falls off, and the movement of the pin 31 in the axial direction is avoided as much as possible.

As shown in fig. 5, in the present embodiment, the friction member 21 has a positioning groove 212 disposed facing away from the back plate 22, the friction member through hole 210 is communicated with the positioning groove 212 and has an inlet located at the bottom of the positioning groove 212, and the pressing portion 211 is disposed at the bottom of the positioning groove 212 and beside the inlet; the press contact portion 32 is positioned in the positioning groove 212 and abuts on the press contact portion 211.

The positioning of the crimping part 32 can be conveniently realized by arranging the positioning groove 212, and the assembly of the pin 31 can be better realized by arranging the positioning groove 212 to be arranged towards the opening away from the back plate 22.

As shown in fig. 7 to 8, the friction member 2 further has a reinforcing member 23 provided on the friction member 21, the reinforcing member 23 includes a reinforcing plate 231 provided on the pressure receiving portion 211 and a reinforcing ring 232 provided on a side wall of the friction member through hole 210, the pressure receiving portion 32 abuts on the reinforcing plate 231, and the reinforcing plate 231 has an annular structure.

The provision of the reinforcing member 23 can improve the stability of the fitting of the crimping portion 32 to the friction member 21, and the reinforcing member 23 can be integrally formed during the formation of the friction member 21 by adding a reinforcing material during the manufacture of the friction member 21.

It will be appreciated that the size of the stiffener ring 232 in the axial direction is less than or equal to the depth of the friction member bore 210, thereby avoiding the stiffener ring 232 from being supported between the crimping portion 32 and the backing plate 22 and thus avoiding the weakening of the compression of the friction member 21 after the stiffener ring is used.

The reinforcing ring 232 and the reinforcing plate 231 are integrally formed, and the reinforcing member 23 further has a pre-embedded portion 233 which is disposed on the reinforcing ring 232 and extends into the friction member 21. The pre-embedded parts 233 are pre-placed in the friction member 21 in the process of forming the friction member 21, the pre-embedded parts 233 are multiple, the pre-embedded parts 233 are arranged along the circumferential direction of the reinforcing member 23, and the pre-embedded parts 233 and the reinforcing plate 231 are integrally formed.

Further, as shown in fig. 1 to 3, a hemispherical protrusion 222 is disposed on a side of the back plate 22 away from the friction member 21, the hemispherical protrusion 222 is disposed at a central position of the back plate 22, and the back plate through hole 220 is disposed at a central position of the hemispherical protrusion 222.

When the back plate 22 is pressed against the support plate 1, the hemispherical protrusion 222 abuts against the disc spring, and the arrangement of the hemispherical protrusion 222 enables the back plate 22 to have a certain moving space after being mounted and fixed, so that the back plate is more flexibly suitable for uneven brake discs.

In this embodiment, since the back plate 22 and the friction member 21 are only fixedly assembled by crimping, in order to prevent the back plate 22 and the friction member 21 from rotating relatively, the brake pad further has a rotation limiting component;

as shown in fig. 3 and 10, the rotation limiting assembly includes a limiting groove 223 disposed on the back plate 22 and opening toward the friction member 21, a positioning portion 213 adapted to the limiting groove 223 is formed on the friction member 21, and a cross section of the positioning portion 213 is triangular, quadrangular or polygonal. The positioning portion 213 has a hexagonal cross section in the present embodiment.

As shown in fig. 14 to 16, in another embodiment, the rotation limiting component includes a positioning post 224 disposed on the back plate 22 and protruding toward the friction member 21, a groove body 214 adapted to the positioning post 224 is disposed on the friction member 21, and the rotation limiting of the back plate 22 and the friction member 21 is realized through the cooperation of the positioning post 224 and the groove body 214, it can be understood that at least two sets of the rotation limiting components are disposed between the back plate 22 and the friction member 21 to realize the rotation limiting of the two sets of the rotation limiting components.

Need timely change the brake lining after friction member 21 wearing and tearing are accomplished in prior art, need detect the thickness of friction subassembly 2 when detecting the brake lining of vehicle, thereby judge whether need to change the brake lining, mainly detect friction subassembly 2 thickness through the measuring mode among the prior art, change the brake lining promptly after detecting the thickness of friction subassembly 2 and being less than a certain value, because the space at brake lining place is limited in the practical application in-process, adopt the measuring mode to hardly operate, thereby caused the inconvenient observation of the friction subassembly 2 wearing and tearing condition, the wearing and tearing condition of friction subassembly 2 can not timely efficient be confirmed.

In order to solve the above problem, a friction surface 215 is formed on a side of the friction member 21 facing away from the back plate 22; the brake pad further comprises a wear indicator 6 arranged on the friction member 21, the wear indicator 6 being arranged on the friction member 21 on a side remote from the friction surface 215; the wear indicator 6 is provided to form an easily detectable mark on the object to be rubbed after the object to be rubbed is rubbed against the object.

Being the brake disc by the thing that rubs in this embodiment, wearing and tearing to a certain extent back at friction spare 21, wearing and tearing indicator 6 outwards exposes and produces relative friction with the brake disc, wearing and tearing indicator 6 can form the vestige on the brake disc, and this vestige is the easy detection trace that detects for convenience, has realized through above-mentioned structure whether have the easy detection trace on the brake disc and judge whether wearing and tearing of friction spare 21 target in place, and then can more directly perceived effectual observation whether need change the brake lining.

In a specific embodiment, the easily detectable mark may be a mark with color, which is directly observed on the brake disc by naked eyes, or the easily detectable mark may be a fluorescent material adhered on the brake disc after the fluorescent material is rubbed, and whether the fluorescent material is present or not is observed by illuminating the brake disc during detection, if so, it indicates that the friction member 21 is worn in place, so that the need for replacing the brake pad can be determined in time.

It will be appreciated that in order to achieve the above, the wear indicator 6 is a different colour to the friction member 21 or the wear indicator 6 is a fluorescent member.

It should be noted that the specific material of the non-fluorescent wear indicator 6 is not limited in particular, as long as the prior art can form a friction mark on a rubbed object after being rubbed, the material can be doped with different pigments to form different friction marks, and the material can be rubber or organic composite material with different pigments.

As shown in fig. 3, in order to facilitate loading of the wear indicator 6 on the friction member 21, the friction member 21 has a mounting groove 216 opening toward the back plate 22, and the wear indicator 6 is positioned in the mounting groove 216.

The wear indicator 6 may be installed and fixed by forming an installation groove 216 on the friction member 21 after the friction member 21 is molded, or may be placed in advance and molded together during the molding of the friction member 21.

As shown in fig. 11 to 13, the wear indicating member 6 includes a first wear indicating portion 61 and a second wear indicating portion 62, the first wear indicating portion 61 is closer to the frictional surface 215 than the second wear indicating portion 62, and the first wear indicating portion 61 and the second wear indicating portion 62 are different in color.

The wear indication parts with two different colors can better monitor the wear degree of the friction piece 21, the first wear indication part 61 can be set to be yellow, the second indication part 62 is set to be red, yellow easily-detected marks are formed on the brake disc after the first wear indication part 61 is worn, only the fact that the brake disc needs to be noticed is achieved, after the second wear indication part 62 is worn, the second wear indication part 62 is relatively arranged at a position far away from the friction surface 215, the second wear indication part 62 indicates that the wear is serious after being worn, the second wear indication part 62 forms red marks on the brake disc, the red marks have a warning effect, and observation can be achieved more visually.

Providing the first wear indicating portion 61 and the second wear indicating portion 62 enables two-stage indication, thereby achieving better indication. Of course, in other embodiments, a multi-level reminder may be set, and when the multi-level reminder is set, only more wear indicators need to be set.

Because two-stage reminding is arranged, the wear indicator 6 has directivity, the installation and fixation of the wear indicator 6 need to be along a specific direction, and a direction indicating structure is arranged on the wear indicator 6 in order to conveniently realize the installation and fixation of the wear indicator 6;

as shown in fig. 11 and 12, the direction indicating structure is an indicating groove 63 provided on the first wear indicating portion 61, and the indicating groove 63 is opened in a direction away from the second wear indicating portion 62.

Of course, in another embodiment, as shown in fig. 13, the direction indicating structure is an indicating groove 63 provided on the second wear indicating portion 62, and the indicating groove 63 is opened in a direction away from the first wear indicating portion 61.

In the present embodiment, as shown in fig. 9, the first wear indicator 61 and the second wear indicator 62 are coaxially disposed, and the size of the cross section of the first wear indicator 61 is different from that of the cross section of the second wear indicator 62. The cross-sectional dimensions of the first wear indicating part 61 and the cross-sectional dimensions of the second wear indicating part 62 are set so as not to differ such that the wear indicator 6 has a pyramid type or an inverted pyramid type, thereby providing the wear indicator 6 with direction indication.

In order to facilitate the installation and fixation of the wear indicator 6, the cross section of the first wear indicator 61 is smaller than the cross section of the second wear indicator 62; the mounting groove 63 is internally provided with a first groove body matched with the first wear indicating part 61 and a second groove body matched with the second wear indicating part 62.

The structure, features and effects of the present invention have been described in detail above according to the embodiment shown in the drawings, and the above description is only the preferred embodiment of the present invention, but the present invention is not limited to the implementation scope shown in the drawings, and all changes made according to the idea of the present invention or equivalent embodiments modified to the same changes should be considered within the protection scope of the present invention when not exceeding the spirit covered by the description and drawings.

Claims

1. A brake pad, comprising: the friction component comprises a support plate, a plurality of friction components and a fastening component, wherein the friction components and the fastening component are arranged on the support plate;

the friction component comprises a friction piece and a back plate, and the friction piece is provided with a friction piece through hole matched with the pin shaft and a pressure bearing part matched with the pressure bearing part; the back plate is provided with a back plate through hole matched with the pin shaft;

2. The brake pad of claim 1, wherein: the back plate through hole is opposite to the friction piece through hole, and the size of the back plate through hole is smaller than that of the friction piece through hole; a back plate limiting part is arranged on the back plate opposite to the friction piece through hole; and the pin shaft is provided with an axial limiting part which is used for abutting against the back plate limiting part.

3. The brake pad of claim 2, wherein: the hinge pin comprises a first shaft body and a second shaft body which are coaxially arranged, the crimping part is arranged on one side, away from the second shaft body, of the first shaft body, the first shaft body is matched with the friction part through hole, and the second shaft body is matched with the back plate through hole;

4. The brake pad of claim 3, wherein: the size of the first shaft body in the axial direction is smaller than the depth of the through hole of the friction piece, so that a gap part is formed between the axial limiting part and the back plate limiting part.

5. The brake pad of claim 1, wherein: the friction piece is provided with a positioning groove which is arranged to face away from the opening of the back plate, the friction piece through hole is communicated with the positioning groove and is provided with an inlet which is positioned at the bottom of the positioning groove, and the bearing part is arranged at the bottom of the positioning groove and is positioned at the side of the inlet; the pressing part is positioned in the positioning groove and abuts against the pressing part.

6. The brake pad of claim 5, wherein: the friction component is also provided with a reinforcing piece arranged on the friction piece, the reinforcing piece comprises a reinforcing plate arranged on the pressure bearing part and a reinforcing ring arranged on the side wall of the friction piece through hole, and the crimping part is abutted on the reinforcing plate.

7. The brake pad of claim 6, wherein: the reinforcing ring with reinforcing plate integrated into one piece, the reinforcement still has the setting and is in on the reinforcing ring and extend the setting and be in pre-buried portion in the friction member.

8. The brake pad of any one of claims 1 to 7, wherein: one side of the back plate, which is far away from the friction piece, is provided with a hemispherical protrusion, the hemispherical protrusion is arranged at the central position of the back plate, and the back plate through hole is arranged at the central position of the hemispherical protrusion.

9. The brake pad of any one of claims 1 to 7, wherein: the brake pad is also provided with a rotary limiting component;

10. The brake pad according to any one of claims 1 to 7, wherein: the brake pad is further provided with a rotary limiting assembly, the rotary limiting assembly comprises a positioning column which is arranged on the back plate and protrudes towards the direction of the friction piece, and a groove body matched with the positioning column is arranged on the friction piece.

11. The brake pad according to any one of claims 1 to 7, wherein: one side of the friction piece, which is far away from the back plate, forms a friction surface; the brake pad is also provided with a wear indicator arranged on the friction piece, and the wear indicator is arranged on one side of the friction piece far away from the friction surface; the wear indicator is configured to form an easily detectable mark on the rubbed object after the rubbing is performed against the rubbed object.

12. The brake pad of claim 11, wherein: the wear indicator is a different color than the friction element or the wear indicator is a fluorescent element.

13. The brake pad of claim 11, wherein: the friction member has a mounting slot therein that opens toward the backing plate, and the wear indicator is positioned within the mounting slot.

14. The brake pad of claim 13, wherein: the wear indicator includes a first wear indicator portion and a second wear indicator portion, the first wear indicator portion being closer to the friction surface than the second wear indicator portion, the first wear indicator portion and the second wear indicator portion being different colors.

15. The brake pad of claim 14, wherein: the first wear indicator and the second wear indicator are coaxially arranged, the size of the cross section of the first wear indicator is different from that of the cross section of the second wear indicator, and the size of the cross section of the first wear indicator is smaller than that of the cross section of the second wear indicator; the mounting groove is internally provided with a first groove body matched with the first wear indicating part and a second groove body matched with the second wear indicating part.