CN210715668U - Arc triangle-shaped's high-speed powder metallurgy brake lining for EMUs - Google Patents

Arc triangle-shaped's high-speed powder metallurgy brake lining for EMUs Download PDF

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Publication number
CN210715668U
CN210715668U CN201921126958.XU CN201921126958U CN210715668U CN 210715668 U CN210715668 U CN 210715668U CN 201921126958 U CN201921126958 U CN 201921126958U CN 210715668 U CN210715668 U CN 210715668U
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China
Prior art keywords
friction
ring
arc
triangle
brake lining
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CN201921126958.XU
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Chinese (zh)
Inventor
庾正伟
宋川
洪翔
黄杰
刘正华
江庆
田雅萍
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China Railway Longchang Materials Co Ltd
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China Railway Longchang Materials Co Ltd
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Abstract

The utility model discloses a high-speed EMUs of arc triangle-shaped shape are with powder metallurgy brake lining, including the steel backing and the clutch blocks of setting on the steel backing, the clutch blocks is the shape of arc triangle-shaped straight flange, the quantity of arranging of clutch blocks on the brake lining increases from the inner circle to the outer lane in proper order. Compared with the prior art, the utility model has the positive effects that: 1. the unique structure with the circular hole in the middle of the arc triangle has larger total side area compared with other structures, good heat dissipation effect and can effectively reduce the braking temperature; 2. compared with other arrangement modes, the reasonable arrangement of the positions of the friction blocks has the advantages that the temperature difference of the friction bodies of the inner ring and the outer ring is more uniform, and the consistency of the abrasion conditions of the friction blocks of the inner ring and the outer ring is better; 3. the reasonable design of the clearance between the friction block and the steel backing solves the problem of skeleton deformation caused by overhigh braking temperature under severe working conditions; 4. the design of two straight edges of the friction block and the anti-rotation boss effectively limits the rotation of the friction block, and the reliability of the friction block in the use process is improved.

Description

Arc triangle-shaped's high-speed powder metallurgy brake lining for EMUs
Technical Field
The utility model relates to a powder metallurgy brake lining for high-speed EMUs of arc triangle-shaped shape.
Background
The powder metallurgy brake lining is used as an important part of a train braking system of a motor train unit, and influences the safety, stability and comfort of the running of the motor train unit. Along with the continuous promotion of speed at the time of EMUs train operation, constantly improve to each item performance requirement of powder metallurgy brake lining, the following problem often appears in the powder metallurgy brake lining at the braking in-process:
1. the friction body on the brake pad has high temperature, and the heat fading is accelerated, so that the friction performance is reduced;
2. the temperature difference of friction bodies of the inner ring and the outer ring of the brake pad is large, so that the abrasion conditions of the friction bodies are large;
3. the framework of the friction block is easy to deform in the long-term service process, so that the brake pad is out of service;
4. the friction block rotates in the braking process, so that the friction performance of the friction block is influenced, and the impact vibration performance of the friction block is reduced.
5. The friction block is easy to incline due to large braking force in the using process, so that the friction block is seriously worn.
Therefore, the powder metallurgy brake pad structure needs to be optimized to solve the above problems.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model provides a powder metallurgy brake lining for high-speed EMUs of arc triangle-shaped shape.
The utility model adopts the technical proposal that: the powder metallurgy brake pad for the arc-triangular high-speed motor train unit comprises a steel backing and friction blocks arranged on the steel backing, wherein the friction blocks are in the shape of straight edges of the arc-triangular brake pad, and the arrangement number of the friction blocks on the brake pad is increased from an inner ring to an outer ring.
Furthermore, the friction blocks are distributed on the steel backing along an arc line from the inner ring to the outer ring and are distributed in 3 layers, and the distribution number is 2, 3 and 4 in sequence from the inner ring to the outer ring.
Furthermore, a special-shaped anti-rotation boss is arranged on the steel backing, and the anti-rotation boss is matched with the edge of the friction block.
Furthermore, the friction block is formed by combining and pressing a friction body and a base, each corner of the friction body is composed of an arc edge with the radius of 50-55mm and an arc edge with the radius of 10-12mm, one corner of the friction body is provided with symmetrically arranged anti-rotation straight edges with the length of 20-22mm, and the center of the friction body is provided with a round hole.
Furthermore, the diameter of the round hole is 10-12mm, and the base is formed by interference fit of a positioning pin and the framework.
Further, the front of the steel backing is provided with a disc spring mounting hole, a disc spring is arranged in the disc spring mounting hole, the back of the steel backing is provided with a clamp spring mounting hole concentric with the disc spring mounting hole, a clamp spring is arranged in the clamp spring mounting hole, the positioning pin penetrates through the disc spring and extends into the clamp spring mounting hole, and the clamp spring is matched with a clamp spring clamping groove in the positioning pin to fix the friction block on the steel backing.
Furthermore, the depth of the disc spring mounting hole is 1-2 mm, and the depth of the clamp spring mounting hole is 4-5 mm.
Furthermore, a spherical surface is arranged on the framework and is in contact with an inner ring of the disc spring, and a floating gap is formed between the framework and the steel back.
Furthermore, the radius of the spherical surface is 11-13mm, and the height is 4-6 mm.
Further, the floating gap is 0.8-1.2 mm.
Compared with the prior art, the utility model has the positive effects that:
1. the unique structure with the circular hole in the middle of the arc triangle has larger total side area compared with other structures, good heat dissipation effect and can effectively reduce the braking temperature;
2. compared with other arrangement modes, the reasonable arrangement of the positions of the friction blocks has the advantages that the temperature difference of the friction bodies of the inner ring and the outer ring is more uniform, and the consistency of the abrasion conditions of the friction blocks of the inner ring and the outer ring is better;
3. the reasonable design of the clearance between the friction block and the steel backing solves the problem of skeleton deformation caused by overhigh braking temperature under severe working conditions;
4. the design of two straight edges of the friction block and the anti-rotation boss effectively limits the rotation of the friction block, and the reliability of the friction block in the use process is improved.
5. The utility model discloses a powder metallurgy brake lining for high-speed EMUs excellent in use effect, longe-lived.
Drawings
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a schematic structural view of a powder metallurgy brake lining for a high-speed motor train unit in an arc-triangle shape according to the present invention;
FIG. 2 is a schematic structural view of the friction block of the present invention;
FIG. 3 is a schematic structural view of the friction block base of the present invention;
FIG. 4 is a sectional view taken along line A-A of the steel backing of the present invention;
FIG. 5 is a top view of the powder metallurgy brake lining for the arc-triangle high-speed motor train unit of the present invention;
fig. 6 is a schematic structural view of the friction body of the present invention;
fig. 7 is a schematic structural view of the dowel of the present invention;
fig. 8 is a schematic structural view of the framework of the present invention.
Detailed Description
A powder metallurgy brake pad for a high-speed motor train unit in an arc triangle shape, as shown in fig. 1 to 8, comprising: the anti-rotation steel back comprises a steel back 1, a clamp spring 2, a disc spring 3, a friction block 4, a friction body 5, a base 6, a positioning pin 7, a framework 8, a clamp spring mounting hole 9, a disc spring mounting hole 10, an anti-rotation boss 11, an anti-rotation boss 12, a round hole 13, a clamp spring clamping groove 14, a spherical surface 15 and the like. Wherein:
as shown in figure 1, the utility model discloses a powder metallurgy brake lining for high-speed train comprises steel backing 1, a plurality of jump ring 2, a plurality of belleville spring 3 and a plurality of clutch blocks 4.
As shown in fig. 4 and 5, a clamp spring mounting hole 9, a belleville spring mounting hole 10, an anti-rotation boss 11, and an anti-rotation boss 12 are provided on the steel backing 1. The disc spring mounting hole 10 is a circular counter bore with the depth of 1mm-2mm and is arranged on one surface of the steel backing 1 close to the friction block 4; the clamp spring mounting hole 9 is a circular counter bore with the depth of 4-5mm, is arranged on the back of the disc spring mounting hole 10 and is concentric with the disc spring mounting hole 10; the friction blocks 4 are distributed on the steel backing 1 along an arc line from the inner ring to the outer ring and are distributed in 3 layers, and the distribution number is 2, 3 and 4 from the inner ring to the outer ring; an anti-rotation boss 11 and an anti-rotation boss 12 are arranged on the steel back 1 and are respectively matched with the edges of the 4 friction blocks 4 to control the rotation amount of the friction blocks (as shown in figures 5 and 6, two side surfaces of the anti-rotation boss 11 are respectively contacted with an anti-rotation straight edge of one friction body and an arc triangle of the other friction body, two side surfaces of the anti-rotation boss 12 are respectively contacted with the anti-rotation straight edges of the two friction bodies), and the other friction blocks 4 are matched with the anti-rotation straight edges to control the rotation amount of the friction blocks.
As shown in fig. 2, the friction block 4 is formed by pressing a friction body 5 and a base 6 in combination.
As shown in fig. 3, the base 6 is formed by interference fit of a positioning pin 7 and a framework 8.
As shown in figure 6, the friction body 5 consists of 3 circular arc edges R1 with the radius of 50-55mm, 3 circular arc edges R2 with the radius of 10-12mm, 2 anti-rotation straight edges L1 with the length of 20-22mm and 1 central round hole 12 with the diameter of 10-12 mm. The special arc triangle structure with the two anti-rotation straight edges ensures the maximization of the side area of the friction body and improves the heat dissipation performance of the friction body. Meanwhile, the design of the two anti-rotation straight edges can also control the rotation of the friction body.
As shown in fig. 7, the positioning pin 7 is provided with a snap spring slot 14.
As shown in figure 8, a spherical surface 15 with the radius of 11-13mm and the height of 4-6mm is arranged on the framework 8, the spherical surface 15 is in contact with the inner ring of the disc spring 3 when in use, and the floating adjustment function during the braking of the friction block can be realized by the assembly mode that the spherical surface is in contact with the disc spring, so that the eccentric wear phenomenon caused by the inclination of the friction block is avoided. The floating clearance of the framework 8 and the steel backing 1 is 0.8-1.2mm, in the braking process, when the floating adjustment quantity is equal to the floating clearance of the framework 8 and the steel backing 1, the framework 8 is in contact with the steel backing 1, the framework is supported by the steel backing at the moment, and the problem of framework deformation can be solved.
During the equipment, put belleville spring 3 in belleville spring mounting hole 10 of steel backing 1, clutch blocks 4 are put on belleville spring 3, and the dowel pin 7 of clutch blocks 4 passes belleville spring 3 and stretches to in the jump ring mounting hole 9 at the steel backing 1 back, puts jump ring 2 into jump ring mounting hole 9 of steel backing 1 and cooperates with jump ring draw-in groove 14 on dowel pin 7, fixes clutch blocks 4 on steel backing 1.
The utility model discloses a theory of operation does:
1. the utility model discloses 4 structural design of clutch blocks of straight flange are prevented changeing in unique arc triangle-shaped area compares with other clutch blocks structures commonly used, and the side area of friction piece is bigger, and the thermal diffusivity is better. The design that the center of the friction body 5 is provided with the round hole 13 is also beneficial to heat dissipation and chip removal of the friction body 5, and the problem of overhigh temperature of the friction body is effectively solved;
2. according to the characteristic that the brake linear velocities of the inner and outer friction surfaces of the brake pad are different, the arrangement of the friction blocks is reasonably designed, the arrangement number of the friction blocks 4 from the inner ring to the outer ring is sequentially increased, so that the friction blocks of the inner and outer rings are heated more uniformly, and the problem of large temperature difference of friction bodies of the inner and outer rings is effectively solved;
3. the utility model discloses floating clearance to between clutch block skeleton 8, belleville spring 3 and the steel backing 1 has carried out optimal design, has increased the support nature of steel backing to the clutch block skeleton. When the brake pad is braked and stressed, the disc spring is stressed, deformed and floated, and the friction block framework is supported by the steel backing, so that the problem of framework deformation is effectively solved;
4. the unique friction block structure design with two anti-rotation straight edges and the anti-rotation bosses 11 and 12 effectively limit the rotation of the friction block 4 in the braking process, thereby solving the problem of the rotation of the friction block;
5. the utility model discloses a design of the sphere 15 of clutch block skeleton 8 and the contact of belleville spring 3 can make clutch block 4 float at the certain limit, reaches the effect of the 4 working faces of automatically regulated clutch block, makes the 4 working faces of clutch block can laminate with the brake disc better, effectively solves the problem of clutch block 4 eccentric wear.

Claims (8)

1. The utility model provides a powder metallurgy brake lining for high-speed EMUs of arc triangle-shaped shape which characterized in that: the brake pad comprises a steel back and friction blocks arranged on the steel back, wherein the friction blocks are in the shape of an arc triangle with a straight edge, and the arrangement number of the friction blocks on the brake pad is increased from an inner ring to an outer ring; the friction block is formed by combining and pressing a friction body and a base, each corner of the friction body is composed of an arc edge with the radius of 50-55mm and an arc edge with the radius of 10-12mm, one corner of the friction body is provided with an anti-rotation straight edge which is symmetrically arranged and has the length of 20-22mm, and the center of the friction body is provided with a round hole; the steel backing is provided with a special-shaped anti-rotation boss, and the anti-rotation boss is matched with the edge of the friction block.
2. The arc-triangle-shaped powder metallurgy brake lining for the high-speed motor train unit according to claim 1, is characterized in that: the friction blocks are distributed on the steel backing along an arc line from the inner ring to the outer ring and are distributed in 3 layers, and the distribution number is 2, 3 and 4 in sequence from the inner ring to the outer ring.
3. The arc-triangle-shaped powder metallurgy brake lining for the high-speed motor train unit according to claim 1, is characterized in that: the diameter of the round hole is 10-12mm, and the base is formed by interference fit of a positioning pin and the framework.
4. The arc-triangle-shaped powder metallurgy brake lining for the high-speed motor train unit as claimed in claim 3, wherein: the front of steel backing sets up the belleville spring mounting hole, sets up belleville spring in the belleville spring mounting hole the back of steel backing sets up with the endocentric jump ring mounting hole of belleville spring mounting hole, sets up the jump ring in the jump ring mounting hole, the dowel pin passes belleville spring and stretches into in the jump ring mounting hole, jump ring and the cooperation of the jump ring draw-in groove on the dowel pin fix the clutch blocks on the steel backing.
5. The arc-triangle-shaped powder metallurgy brake lining for the high-speed motor train unit as claimed in claim 4, wherein: the depth of the disc spring mounting hole is 1mm-2mm, and the depth of the clamp spring mounting hole is 4-5 mm.
6. The arc-triangle-shaped powder metallurgy brake lining for the high-speed motor train unit as claimed in claim 4, wherein: the framework is provided with a spherical surface, the spherical surface is in contact with an inner ring of the disc spring, and a floating gap is formed between the framework and the steel back.
7. The arc-triangle-shaped powder metallurgy brake lining for the high-speed motor train unit as claimed in claim 6, is characterized in that: the radius of the spherical surface is 11-13mm, and the height is 4-6 mm.
8. The arc-triangle-shaped powder metallurgy brake lining for the high-speed motor train unit as claimed in claim 6, is characterized in that: the floating clearance is 0.8-1.2 mm.
CN201921126958.XU 2019-07-17 2019-07-17 Arc triangle-shaped's high-speed powder metallurgy brake lining for EMUs Active CN210715668U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921126958.XU CN210715668U (en) 2019-07-17 2019-07-17 Arc triangle-shaped's high-speed powder metallurgy brake lining for EMUs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921126958.XU CN210715668U (en) 2019-07-17 2019-07-17 Arc triangle-shaped's high-speed powder metallurgy brake lining for EMUs

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CN210715668U true CN210715668U (en) 2020-06-09

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113027961A (en) * 2021-02-10 2021-06-25 中铁隆昌铁路器材有限公司 Friction body self-adaptive adjusting structure of powder metallurgy brake pad for high-speed motor train unit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113027961A (en) * 2021-02-10 2021-06-25 中铁隆昌铁路器材有限公司 Friction body self-adaptive adjusting structure of powder metallurgy brake pad for high-speed motor train unit

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