CN216519333U

CN216519333U - Train brake pad

Info

Publication number: CN216519333U
Application number: CN202220007284.7U
Authority: CN
Inventors: 不公告发明人
Original assignee: Shanghai Lianzong Rail Transit Technology Co ltd
Current assignee: Shanghai Lianzong Rail Transit Technology Co ltd
Priority date: 2022-01-05
Filing date: 2022-01-05
Publication date: 2022-05-13
Anticipated expiration: 2032-01-05

Abstract

The utility model provides a train brake pad, belonging to the technical field of brake pad manufacturing; the utility model includes: a steel backing and a plurality of friction blocks; the steel back is provided with a plurality of cambered surface grooves, and the central bottom of each cambered surface groove is provided with a mounting hole; each friction block is provided with a back plate, and a shaft pin is arranged on the back plate; a spherical protrusion is arranged at the joint of the shaft pin and the back plate; the friction block passes through the mounting hole through the shaft pin and is mounted on the steel back, and the spherical protrusion is in surface contact with the cambered groove; the friction blocks are divided into a plurality of groups, and each group at least comprises one friction block; and a gap is reserved between each group of friction blocks and the adjacent group of friction blocks. In the utility model, the spherical surface is installed on the steel back in a contact manner, so that eccentric wear of the friction block can be effectively reduced; and the friction blocks are arranged in groups and have gaps, so that good chip removal, ventilation and heat dissipation effects can be ensured.

Description

Train brake pad

Technical Field

The utility model relates to a brake pad manufacturing technology, in particular to a train brake pad, and belongs to the technical field of brake pad manufacturing production.

Background

The brake pad is the most critical execution component in the train braking system of the motor train unit, not only requires stable, wear-resisting and high temperature resistant friction coefficient, but also ensures the effective friction area of the brake pad and the brake disc, reduces the phenomena of unstable braking, abnormal wear, edge breakage, block falling and the like caused by eccentric wear, and improves the braking efficiency and the service life of the brake pad.

The friction block arrangement has very important influence on the cost and the service life of the brake pad, and under extreme climatic conditions such as sand wind, ice and snow weather, friction chips and hard particles are easy to remain between the brake disc and the brake pad to form inclusion, so that the brake pad is abnormally abraded, falls off blocks or scratches the brake disc, and the maintenance and use cost is increased rapidly. Scientific and reasonable's clutch blocks layout can form good ventilation chip removal passageway, effectively avoids the heat decay of brake disc and brake lining structure, reduces the deformation, the chap or the destruction that the structure leads to because of thermal fatigue, promotes the life of brake lining and brake disc, reduces the full life cycle cost of train.

The powder metallurgy brake pad for the motor train unit in the prior art generally comprises a steel back plate, a dovetail block and a plurality of brake pad friction bodies; the steel back plate and the dovetail block are of an integrated forming structure, any brake pad friction body is fixed on the steel back plate through a large gasket and a rivet, and the large gasket is located between the brake pad friction body and the steel back plate.

Because the friction bodies are fixedly connected with the steel back plate, brake pads cannot be automatically adjusted during braking, the gap between two adjacent friction plates is small, a large gap is formed between the friction plates but the channel is not smooth, friction chips and hard particles are easy to accumulate in the friction plates under extreme climates such as ice and snow, and the problems of abnormal abrasion, block falling or brake disc scratching and the like of the brake pads are easily caused. The unsmooth ventilation and heat dissipation channel can easily cause the high temperature generated during braking to be unable to be effectively dissipated, and the deformation, the cracking or the damage of the brake pad structural member caused by thermal fatigue can be easily caused repeatedly for a long time, thereby influencing the service life of the brake pad.

Therefore, it is a technical problem to be solved by those skilled in the art to develop a brake pad that can continuously and effectively dissipate heat, can prevent eccentric wear, and has good braking performance and long service life.

SUMMERY OF THE UTILITY MODEL

The utility model provides a novel train brake pad, which is characterized in that friction blocks are arranged in groups and installed in a spherical contact manner, so that the friction blocks can effectively remove chips and dissipate heat, and the technical problems of eccentric wear and heat dissipation of the friction blocks in the prior art can be solved.

The train brake pad of the present invention comprises: a steel backing and a plurality of friction blocks; the steel back is provided with a plurality of cambered surface grooves, and the bottom of the center of each cambered surface groove is provided with a mounting hole; each friction block is provided with a back plate, and the back plate is provided with a shaft pin; a spherical protrusion is arranged at the joint of the shaft pin and the back plate;

the friction block passes through the mounting hole through the shaft pin and is mounted on the steel back, and the spherical protrusion is in surface contact with the cambered groove;

the friction blocks are divided into a plurality of groups, and each group at least comprises one friction block; and a gap is reserved between each group of friction blocks and the adjacent group of friction blocks.

The train brake pad is characterized in that the top end of the shaft pin is provided with an annular clamping groove, and a spring buckle is arranged on the annular clamping groove; the friction block is mounted on the mounting hole through the spring buckle.

The train brake pad as described above, wherein the steel backing has a front side and a back side, and the arc groove is located on the front side; the back surface is provided with a containing groove for containing the spring buckle.

The train brake pad as described above, wherein a dovetail groove is further provided on the back surface.

The train brake pad as described above, wherein the back plate, the spherical protrusion and the axle pin are an integrally forged metal piece.

The train brake pad, wherein the friction block is a rectangular friction block; in each group of friction blocks, two adjacent friction blocks are in close contact with each other; and the steel back is also provided with a limiting boss which is used for contacting with the friction block.

The train brake pad, wherein the limit boss is of a strip structure; the limiting boss abuts against one side of the back plate to prevent the friction block from rotating.

The train brake pad is characterized in that the steel backing is provided with two symmetrically arranged steel backs, and each steel back is provided with 9 friction blocks; the friction blocks on each steel backing are divided into four groups, and the number of each group is 1, 2, 3 and 3.

The train brake pad as described above, wherein the gap width between the adjacent sets of friction blocks is 5-15 mm.

In the utility model, the spherical surface is installed on the steel back in a contact manner, so that eccentric wear of the friction block can be effectively reduced; and the friction blocks are arranged in groups and have gaps, so that good chip removal, ventilation and heat dissipation effects can be ensured.

Drawings

FIG. 1 is a general schematic view of a train brake pad according to an embodiment of the present invention;

FIG. 2 is a schematic front view of a steel backing of a train brake pad according to an embodiment of the utility model;

FIG. 3 is a schematic view of the back of a steel backing of a train brake pad according to an embodiment of the utility model;

FIG. 4 is a schematic vertical section of FIG. 1;

FIG. 5 is a schematic diagram of a friction block structure of a train brake pad according to an embodiment of the present invention;

fig. 6 is a schematic view of the spring fastener of fig. 4.

Detailed Description

The structure of the train brake pad is mainly applied to the train brake pad.

As shown in fig. 1, and with reference to fig. 2-6; the train brake pad of the embodiment of the utility model comprises: a steel back 1 and a plurality of friction blocks 2; a plurality of cambered surface grooves 14 are formed in the steel backing 1, and a mounting hole 10 is formed in the center bottom of each cambered surface groove 14; as shown in fig. 5, each of the friction blocks 2 has a back plate 20, and the back plate 20 has a shaft pin 21; a spherical protrusion 23 is arranged at the joint of the shaft pin 21 and the back plate 20; the spherical protrusion 23 is a spherical structure protruding toward the top end of the shaft pin 21.

The friction block 2 is installed on the steel backing 1 by penetrating the installation hole 10 through the shaft pin 21, and the spherical protrusion 23 is in surface contact with the cambered surface groove 14; because the spherical protrusions 23 and the cambered grooves 14 are both spherical structures and are in spherical contact, eccentric wear caused by shaking of the friction block 2 can be effectively prevented, and a lower wear rate is obtained.

As shown in fig. 1, the friction blocks 2 are divided into a plurality of groups, each group including at least one friction block 2; and a gap is reserved between each group of friction blocks 2 and the adjacent group of friction blocks 2.

Preferably, the friction block 2 is a rectangular friction block; in each group of friction blocks, two adjacent friction blocks 2 are in close contact with each other; the steel backing 1 is also provided with a limiting boss 11 which is used for contacting with the friction block 2.

Preferably, the limiting boss 11 is a strip-shaped structure; the limit boss 11 abuts against one side of the back plate 20 to prevent the friction block 2 from rotating.

In general, the steel back 1 has two symmetrically arranged blocks, and each steel back 1 is provided with 9 friction blocks; the friction blocks on each steel backing 1 are divided into four groups, and the number of each group is 1, 2, 3 and 3. In this embodiment, 18 friction bodies are divided into 8 groups and radially arranged to form a channel with a narrow inner part and a wide outer part, so as to ensure good chip removal, ventilation and heat dissipation effects.

Furthermore, the length of the gap between the friction blocks of the adjacent groups is 5-15 mm.

The embodiment utilizes the spherical surface cooperation between the spherical surface protrusions and the steel backing cambered surface grooves, and a floating structure formed by the buckle springs, so that the friction body is self-adaptive to float and tightly attached to the surface of the brake disc, and a good braking effect is achieved.

In the train brake pad of the present embodiment, as shown in fig. 4 and 5, an annular groove is formed at the top end of the shaft pin 21, and a spring buckle 22 is installed on the annular groove; the friction block 2 is mounted on the mounting hole 10 through the spring catch 22 to prevent the friction block from falling off the mounting hole.

Further, the steel back 1 is provided with a front surface and a back surface, and the cambered surface groove 14 is positioned on the front surface; the back surface is provided with a receiving groove 16 for receiving the spring clip 22. The receiving groove 16 is used for engaging the outer side of the spring buckle 22 from the outside, so as to ensure that the spring buckle is not easy to fall off.

Typically, the back surface is also provided with dovetail grooves 15. The dovetail plate is used to mount the entire brake pad on the brake apparatus. In addition, the steel backing and the dovetail plate are of an integrated metal structure. The integrated metal structure of the steel back and the dovetail plate has higher reliability than a riveting structure or a welding structure.

In an actual state, the left steel backing and the left dovetail plate are of an integrated metal structure formed by machining after casting; the right steel backing and the right dovetail plate are integrated metal structures which are machined and formed after casting.

In the train brake pad of the present embodiment, the back plate 20, the spherical protrusion 23 and the axle pin 21 are an integrally forged metal piece. Under the condition of meeting the size requirement of a standard interface, the thickness of the friction material of the friction block is 2-3mm thicker than that of other similar brake pad friction blocks. Under the same technical conditions, compared with other brake pads, the brake pad has the advantages that the service life is prolonged, the replacement frequency is reduced, and the whole life cycle cost of the train is reduced.

The utility model has the following advantages:

1. scientific and reasonable's clutch blocks arrange, have good chip removal, ventilation cooling effect when keeping stable coefficient of friction, avoided the heat decay of brake disc and brake lining structure, prolong the life of brake disc and brake lining structure when promoting braking efficiency.

2. The brake pad has simple structure, few parts and low manufacturing cost.

3. The spherical protrusion of the back plate and the steel back cambered surface groove are matched to form a spherical floating structure, so that the self-adjusting function of the friction block is provided, the eccentric wear of the brake pad is improved, the braking efficiency is improved, and the service life of the friction block is prolonged.

4. Under the requirement of meeting the standard interface size, the brake lining has a thicker friction block design, the service life of the brake lining is prolonged, the replacement frequency is reduced, and the full life cycle cost of the train is reduced.

5. The steel backing can be repeatedly used after the friction body is repaired and detached, and the whole life cycle cost of the train is further reduced.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments. Through the above description of the embodiments, those skilled in the art will clearly understand that the above embodiment method can be implemented by some modifications plus the necessary general technical overlap; of course, the method can also be realized by simplifying some important technical features in the upper level. Based on such understanding, the technical solution of the present invention essentially or contributing to the prior art is: integral structures and incorporating the methods described in the various embodiments of the present invention.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A train brake pad, comprising: a steel backing and a plurality of friction blocks; the steel back is provided with a plurality of cambered surface grooves, and the bottom of the center of each cambered surface groove is provided with a mounting hole; each friction block is provided with a back plate, and a shaft pin is arranged on the back plate; a spherical protrusion is arranged at the joint of the shaft pin and the back plate;

2. The train brake pad according to claim 1, wherein the top end of the shaft pin is provided with an annular clamping groove, and a spring buckle is arranged on the annular clamping groove; the friction block is mounted on the mounting hole through the spring buckle.

3. The train brake pad of claim 2, wherein the steel backing has a front face and a back face, the cambered groove being located on the front face; the back surface is provided with a containing groove for containing the spring buckle.

4. The train brake pad of claim 3 wherein said back face further comprises a dovetail groove disposed thereon.

5. The train brake pad of claim 1, wherein the backing plate, the spherical protrusion and the axle pin are a unitary piece of forged metal.

6. The train brake pad of claim 1, wherein the friction block is a rectangular friction block; in each group of friction blocks, two adjacent friction blocks are in close contact with each other; and the steel back is also provided with a limiting boss which is used for contacting with the friction block.

7. The train brake pad of claim 6, wherein the limiting boss is a bar structure; the limiting boss abuts against one side of the back plate to prevent the friction block from rotating.

8. The train brake pad according to any one of claims 1 to 3, wherein the steel backing has two symmetrically arranged blocks, each block having 9 friction blocks mounted thereon; the friction blocks on each steel backing are divided into four groups, and the number of each group is 1, 2, 3 and 3.

9. The train brake pad of claim 8, wherein the gap width between adjacent sets of pads is 5-15 mm.