CN211737840U - Improved brake pad for high-speed train - Google Patents
Improved brake pad for high-speed train Download PDFInfo
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- CN211737840U CN211737840U CN201922427210.XU CN201922427210U CN211737840U CN 211737840 U CN211737840 U CN 211737840U CN 201922427210 U CN201922427210 U CN 201922427210U CN 211737840 U CN211737840 U CN 211737840U
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- material layer
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- friction material
- friction block
- brake pad
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Abstract
The utility model relates to a modified high-speed train is with braking brake lining, the braking brake lining is through one shot forming with the clutch blocks steel backing and transition layer powder, the friction material layer powder of trident shape structure, after the suppression, the clutch blocks steel backing that trident shape structure top has three opening can inlay in the powder metallurgy material, plays the skeleton supporting role, then the sintering forms, the transition layer between clutch blocks steel backing and the friction material layer makes the steel backing and the friction material layer closely sinter together through interdiffusion after the sintering, strengthened the mechanical bonding strength between the two, strengthened the anti-shear property and the shock resistance of clutch blocks; the brake pad is formed by assembling a friction block and a pad steel back. The utility model provides an among the prior art appear the hole on the faying face between sintering in-process friction material layer and the clutch blocks steel backing, lead to the problem that friction material layer and clutch blocks steel backing faying face anti-shear property and shock resistance are weak.
Description
Technical Field
The utility model relates to a high-speed train braking technical field particularly, relates to a modified is brake lining for high-speed train.
Background
With the increasing criss-cross of the high-speed railway network, the running safety of the high-speed train is more and more emphasized, and the braking system is required to generate braking torque to achieve braking in the process from high-speed running to safe brake stopping running, wherein the friction blocks on the brake pads are directly contacted with the wheels, kinetic energy is converted into heat energy through friction and is dissipated into air, so that the performance requirement on the brake pads, particularly the friction blocks on the brake pads is high.
In the prior art, a friction block on a brake pad is formed by pressurizing and sintering a friction material layer and a friction block steel back, and the friction material layer and the friction block steel back are of mutually corresponding structures.
For example, chinese patent publication No. CN109307030A discloses a forked tail steel backing integral type powder metallurgy riveting brake lining, including integrative as cast forked tail steel backplate, there are a plurality of brake lining friction pieces through flat head rivet fastening on the forked tail steel backplate, are equipped with circular gasket between brake lining friction piece and the forked tail steel backplate, and every brake lining friction piece is including the friction piece and the irregular hexagon connection piece that the pressfitting is in the same place. The steel backing and the dovetail are integrated, and the elastic gasket is arranged between the steel backing and the friction body, so that certain gap adjustment amount can be ensured between the steel backing and the friction body, and the safe use of the brake pad can be ensured.
For another example, the utility model patent with chinese patent publication No. CN106979267A discloses a friction block for a high-speed train powder metallurgy brake pad and a method for manufacturing the same, wherein the friction block comprises a copper-plated back plate and a friction body, a transition layer is further provided between the copper-plated back plate and the friction body, and the transition layer is completely metallurgically fused with the copper-plated back plate and the friction body respectively; the friction body, the transition layer and the copper-plated back plate are pressed and then sintered to form the high-speed train powder metallurgy brake pad friction block; and the transition layer is formed by mixing and sintering metal powder and copper powder. The friction block can overcome the defect that the back plate and the friction body are separated and easily fall off due to low bonding strength of the back plate and the friction body in the friction block, and greatly prolongs the service life of the high-speed train powder metallurgy brake pad made of the friction block.
The prior art has at least the following problems:
because the powder metallurgy friction material contains non-metallic components such as graphite, silicon dioxide and the like, the non-metallic components are not wetted with metal, and pores are inevitably formed on a joint surface between the friction material layer and the friction block steel backing in the sintering process, so that the shear resistance and the shock resistance of the joint surface are poor, the friction material layer falls off and falls off, and the safety risk exists.
Aiming at the problems that in the prior art, a powder metallurgy friction material contains non-metallic components such as graphite, silicon dioxide and the like, the friction material is not wetted with metal, and pores are inevitably formed on a joint surface between a friction material layer and a friction block steel back in a sintering process, so that the shear resistance and the shock resistance of the joint surface between the friction material layer and the friction block steel back are poor, an effective solution is not provided at present.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a modified high-speed train is with braking brake block to the not enough of prior art.
The brake pad includes: friction blocks and brake pad steel backs;
the friction block comprises a friction block steel back and a friction material layer, a containing groove used for containing the friction block steel back is formed in the friction material layer, the friction block steel back is arranged in the containing groove, the friction block steel back is fixedly connected with the friction material layer, and a brake lining steel back is fixedly connected with the friction block steel back.
Further, the friction block steel back is in a three-fork-shaped structure.
Further, the outer side surface of the friction material layer is provided with wear increasing grains.
Furthermore, a transition layer is arranged between the friction block steel back and the friction material layer, and the friction block steel back, the friction material layer and the transition layer are formed by pressing, forming and sintering.
Further, the top end surface of the friction material layer is a convex curved surface.
Further, the shape of the brake lining steel back is dovetail type.
Furthermore, the outer side of the friction block steel back is provided with an inner concave part, and the inner side of the friction material layer is provided with an inner convex part corresponding to the inner concave part.
Furthermore, three top ends of the friction block steel back are respectively provided with a notch, and the inner side of the friction material layer is provided with three bulges corresponding to the notches.
Further, the transition layer is 12-20% Sn-Cu alloy.
Furthermore, the friction block steel back, the transition layer and the friction material layer are respectively provided with a first through hole, a third through hole and a second through hole which are communicated with each other.
Compared with the prior art, the brake pad has the following excellent effect that is showing:
the friction block steel back embedded in the friction material layer has the advantages that the mechanical bonding strength of the friction block steel back embedded in the friction material layer is enhanced, the friction block steel back plays a role of a friction material layer framework, the overall structural strength of the friction block is enhanced, the friction block steel back is of a three-fork structure, so that in the braking process of a high-speed train, the friction material layer is evenly stressed, the structural strength of the brake pad is improved, and the service life of the brake pad is prolonged.
2, through set up the transition layer between clutch block steel backing and friction material layer, promoted intermetallic atom/molecular's interdiffusion, further strengthened the bonding strength between sintered clutch block steel backing and the friction material layer, improved anti-shear property and shock resistance between clutch block steel backing and the friction material layer, the phenomenon that the friction material layer drops, falls the piece can not appear, improved the yields, make the clutch block safe and reliable more in service, and the extension that is showing the life of brake lining.
3, the outer side surface of the friction material layer is provided with the lines, so that the stability of the friction block is effectively improved.
4, set up to convex surface through the top terminal surface with the friction material layer, improved the specific surface area of clutch blocks, increased area of contact when reducing mechanical damage and wrench movement power, the stability of clutch blocks when having increased the brake.
And 5, the three top ends of the steel back of the friction block are respectively provided with a notch, the inner side of the friction material layer is provided with three bulges corresponding to the notches, and the three notches are clamped and fixed with the friction material layer, so that the steel back of the friction block and the friction material layer are more stable, the strength of the friction block is improved, and the service life of the brake pad is further prolonged.
Drawings
Fig. 1 is a schematic perspective view of a brake pad of the present invention;
fig. 2 is a schematic perspective view of a friction block steel back in the brake pad of the present invention;
fig. 3 is a schematic perspective view of a friction material layer in the brake pad of the present invention;
fig. 4 is a cross-sectional view of a friction block in the brake pad of the present invention.
Description of reference numerals:
1-friction block, 11-friction block steel back, 111-first through hole, 112-notch, 113-inner concave part, 114-top end part, 12-friction material layer, 121-accommodating groove, 122-second through hole, 123-top end surface, 124-inner convex part, 125-bulge, 2-brake pad steel back, 3-transition layer and 4-third through hole.
Detailed Description
The invention is described in further detail below with reference to the drawings and the detailed description.
As shown in fig. 1 to 3, the brake pad includes: the friction block comprises a friction block 1 and a brake pad steel back 2, the friction block 1 comprises a friction block steel back 11 and a friction material layer 12, a containing groove 121 for containing the friction block steel back 11 is arranged on the friction material layer 12, the friction block steel back 11 is arranged in the containing groove 121, the friction block steel back 11 is fixedly connected with the friction material layer 12, the brake pad steel back 2 is fixedly connected with the friction block steel back 11, the friction block steel back 11 is arranged in the containing groove 121 to play a role of a framework of the friction material layer 12 and used for increasing the structural strength of the friction material layer 12, as shown in figure 4, a transition layer 3 is arranged between the friction block steel back 11 and the friction material layer 12, the friction block steel back 11, the friction material layer 12 and the transition layer 3 are formed by pressing, forming and sintering, wherein the transition layer 3 is 12-20% of Sn-Cu alloy and used for promoting mutual diffusion of intermetallic atoms/molecules and enhancing the bonding strength between the sintered friction block steel back 11 and the friction material layer, seted up the first through-hole 111 of a plurality of on the clutch blocks steel backing 11, the first through-hole 111 equipartition of a plurality of is on clutch blocks steel backing 11, be equipped with third through-hole 4 and second through-hole 122 corresponding with the first through-hole 111 of a plurality of on transition layer 3 and the friction material layer 12 respectively, be used for passing second through-hole 122 in proper order with fastener (not shown in the figure), third through-hole 4, first through-hole 111, third through-hole 4 equals with first through-hole 111 size, the size of second through-hole 122 is greater than third through-hole 4, first through-hole 111, be used for locating in the second through-hole 122 the head end of fastener, and is concrete, the fastener includes the rivet.
Further, as shown in fig. 2 and fig. 3, the friction block steel back 11 is a three-fork structure, an included angle between adjacent top ends 114 of the friction block steel back 11 of the three-fork structure is 120 degrees, an arc structure passing through the inner concave portion 113 is excessive between the adjacent top ends 114, correspondingly, the friction material layer 12 is provided with an inner convex portion 124 corresponding to the inner concave portion 113, an inner side surface of the inner convex portion 124 is a convex curved surface for being attached to the inner concave portion 113, it should be noted that the friction block steel back 11 is not limited to a three-fork structure, such as a four-fork shape, a five-fork shape, and a six-fork shape … …, only the friction block steel back 11 needs to be ensured to be embedded into the friction material layer 12, so that the friction block steel back 11 plays a role of a framework of the friction material layer 12, the thickness of the friction block steel back 11 is smaller than that of the friction material layer 12, and the side length of the friction material, the friction block steel back 11 is conveniently embedded into the accommodating groove 121 on the friction material layer 12, three top ends 114 of the friction block steel back 11 are respectively provided with a notch 112, and correspondingly, three protrusions 125 corresponding to the notches 112 are arranged on the inner side of the friction material layer 12 for improving the stability of the friction block steel back 11 and the friction material layer 12 during braking, here, it should be noted that when the top ends 114 of the friction block steel back 11 are not provided with the notches 112, although the friction block steel back 11 is also embedded into the friction material layer 12, in the long-term use process, the friction block steel back 11 is easily protruded out of the friction material layer 12 or the friction block steel back 11 is loosened in the friction material layer 12, which is not beneficial to the service life of the friction block 1, similarly, when the friction block steel back 11 is of a four-fork-shaped, five-fork-shaped or six-fork-shaped … … structure, the number of the notches 112 arranged on the top ends 114 of the friction block steel back 11 is opposite to the number of the protrusions 125 arranged on the inner side of the friction material layer Should be used for ensuring the stability of the friction block steel back 11 and the friction material layer 12.
Further, the outer surface of the friction material layer 12 is provided with polishing patterns (not shown), and the polishing patterns are distributed in a ring shape with the center of the friction material layer 12 as the center.
Further, as shown in fig. 1 to 3, the tip end surface 123 of the friction material layer 12 is a convex curved surface for increasing the surface area of the friction block 1, increasing the contact area while reducing mechanical impact and twisting power.
Further, as shown in fig. 1, the brake pad includes a pad steel back 2 and a plurality of friction blocks 1, the pad steel back 2 is fixedly connected with the friction block steel back 11, and the friction blocks 1 are uniformly distributed on the pad steel back 2 and used for generating friction torque by being squeezed with the wheel.
Further, the brake lining steel backing 2 is in a dovetail shape.
The above description is only a preferred embodiment of the present invention and should not be taken as limiting the invention, and it will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention.
Claims (10)
1. An improved brake pad for high-speed trains, comprising: the brake pad comprises a friction block (1) and a brake pad steel back (2);
the friction block (1) comprises a friction block steel back (11) and a friction material layer (12), wherein the friction material layer (12) is provided with a holding groove (121) for holding the friction block steel back (11), the friction block steel back (11) is arranged in the holding groove (121), the friction block steel back (11) is fixedly connected with the friction material layer (12), and the brake lining steel back (2) is fixedly connected with the friction block steel back (11).
2. The improved brake pad for high-speed trains as claimed in claim 1, wherein said friction block steel backing (11) is of a three-forked structure.
3. The improved brake pad for high speed trains as set forth in claim 1, wherein the outer side surface of said friction material layer (12) is provided with a wear enhancing texture.
4. The improved brake pad for high-speed trains as claimed in claim 1, wherein a transition layer (3) is arranged between the friction block steel backing (11) and the friction material layer (12), and the friction block steel backing (11), the friction material layer (12) and the transition layer (3) are formed by pressing, forming and sintering.
5. The improved brake pad for high-speed trains as set forth in claim 1, wherein the top end surface (123) of said friction material layer (12) is convexly curved.
6. The improved brake pad for high-speed trains as claimed in claim 1, wherein the shape of the pad steel backing (2) is dovetail type.
7. The improved brake pad for high-speed trains as claimed in claim 1, wherein the outside of said friction block steel backing (11) is provided with an inner recess (113), and the inside of said friction material layer (12) is provided with an inner protrusion (124) corresponding to said inner recess (113).
8. The improved brake pad for high-speed trains as claimed in claim 2, wherein the three top ends (114) of the friction block steel backing (11) are respectively provided with a notch (112), and the inner side of the friction material layer (12) is provided with three protrusions (125) corresponding to the notches (112).
9. The improved brake pad for high-speed trains as claimed in claim 4, wherein said transition layer (3) is 12-20% Sn-Cu alloy.
10. The improved brake pad for high-speed trains as claimed in claim 4, wherein the friction block steel backing (11), the transition layer (3) and the friction material layer (12) are respectively provided with a first through hole (111), a third through hole (4) and a second through hole (122) which are communicated with each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922427210.XU CN211737840U (en) | 2019-12-27 | 2019-12-27 | Improved brake pad for high-speed train |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922427210.XU CN211737840U (en) | 2019-12-27 | 2019-12-27 | Improved brake pad for high-speed train |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211737840U true CN211737840U (en) | 2020-10-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922427210.XU Active CN211737840U (en) | 2019-12-27 | 2019-12-27 | Improved brake pad for high-speed train |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211737840U (en) |
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2019
- 2019-12-27 CN CN201922427210.XU patent/CN211737840U/en active Active
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