CN211852589U - Powder metallurgy brake pad for motor train unit - Google Patents
Powder metallurgy brake pad for motor train unit Download PDFInfo
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- CN211852589U CN211852589U CN202020028131.1U CN202020028131U CN211852589U CN 211852589 U CN211852589 U CN 211852589U CN 202020028131 U CN202020028131 U CN 202020028131U CN 211852589 U CN211852589 U CN 211852589U
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- friction
- brake pad
- powder metallurgy
- spring
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Abstract
A powder metallurgy brake pad for a motor train unit comprises a left steel backing, a right steel backing, N friction blocks and N spring buckles; the left steel back is provided with a left dovetail plate, the right steel back is provided with a right dovetail plate, and the left steel back and the right steel back are provided with N positioning holes; the friction block comprises a back plate and a friction body; the N friction blocks are respectively arranged on the dovetail-free side planes of the left steel back and the right steel back; the back plate is provided with a pin shaft, an annular clamping groove, a transition section and a plate body; the pin shafts respectively extend into the positioning holes, and the annular clamping grooves are clamped with the springs in a buckling fit manner; and a horn-shaped spring is also arranged between the pin shaft and the positioning hole. The utility model discloses the clutch blocks of brake lining are unsteady, and the plane degree of friction surface can be adjusted to the three-dimensional degree of self-adaptation to the clutch blocks, has avoided the emergence of eccentric wear phenomenon among the messenger's brake lining braking process.
Description
Technical Field
The utility model relates to a brake pad, in particular to powder metallurgy brake pad for EMUs more than 250 kilometers of speed per hour.
Background
With the rapid development of high-speed trains in China, the safety performance of the high-speed trains is particularly important. The brake pad is a key execution component of a high-speed train braking system, and train kinetic energy is converted into friction heat energy through friction between the brake pad and a brake disc, so that the train is decelerated and finally stopped, and the safe operation of the high-speed train is ensured. With the continuous improvement of the train operation speed, higher requirements are put forward on the brake pad structure and the friction material.
CN205298361U discloses a powder metallurgy brake lining, adopts fixed connection between its clutch blocks and the steel backing, and the brake lining does not have angle modulation and floating regulation when braking, and the clutch blocks can not be adjusted by oneself, appears the eccentric wear phenomenon easily.
CN104455105A discloses a floating brake pad, which includes a back plate, wherein a plurality of positioning holes are formed on the back plate; the friction blocks comprise friction parts, positioning parts inserted into the positioning holes and spherical supporting parts arranged between the friction parts and the positioning parts, and the spherical surfaces of the spherical supporting parts protrude towards the positioning parts; the clamping springs are clamped on the positioning parts and connect the friction blocks to the back plate; the disc spring is arranged between the friction block and the back plate, a positioning groove is formed in the back plate, and the disc spring is arranged in the positioning groove; the back plate is divided into a plurality of concentric rings by taking the circle center of a brake disc matched with the brake pad as the circle center, the length of the rings in the radial direction is equal, and the friction area of the friction block in each ring is not more than 15% of the reference average friction area from top to bottom. Above-mentioned floating brake lining installs the dish spring additional between clutch blocks and backplate, makes the angle accessible dish spring of clutch blocks change in order to improve effective friction area to alleviate the eccentric wear of clutch blocks, but the dish spring is limited to the angle modulation of clutch blocks, so in the in-service use process, still exists phenomena such as clutch blocks eccentric wear.
Disclosure of Invention
The utility model aims to solve the technical problem that, overcome the above-mentioned not enough of prior art, provide a powder metallurgy brake lining for EMUs that clutch blocks can three-dimensional degree be adjusted.
The utility model provides a technical scheme that its technical problem adopted is: a powder metallurgy brake pad for a motor train unit comprises a left steel backing, a right steel backing, N friction blocks and N spring buckles; the left steel back is provided with a left dovetail plate, the right steel back is provided with a right dovetail plate, and the left steel back and the right steel back are provided with N positioning holes; the friction block comprises a back plate and a friction body; the N friction blocks are respectively arranged on the dovetail-free side planes of the left steel back and the right steel back; the back plate is provided with a pin shaft, an annular clamping groove, a transition section and a plate body; the pin shafts respectively extend into the positioning holes, and the annular clamping grooves are clamped with the springs in a buckling fit manner; and a horn-shaped spring is arranged between the pin shaft and the positioning hole.
Further, the trumpet spring comprises a big head end, a middle section and a small head end; the middle section is arc-shaped and is connected with the big head end and the small head end; the big end is bent towards the small end, and the big end is lower than the upper horizontal plane of the horn-shaped spring.
Furthermore, in order to adjust the elasticity of the trumpet-shaped spring, 2-12 grooves, preferably 6-10 grooves are arranged in the longitudinal direction of the trumpet-shaped spring.
Furthermore, the locating hole is equipped with spacing heavy platform, the heavy platform of toper, the heavy platform of transition and the heavy platform of installation in proper order.
Further, the big end of the horn-shaped spring is arranged on the conical surface of the conical sinking platform; under the action of the braking pressure of the clamp, the big head end can move up and down on the conical surface of the conical sinking platform; the middle section is in contact with the transition section of the back plate, and the small end is installed in the transition sinking platform in clearance fit.
Further, the plate body is installed to be clearance fit in the spacing platform that sinks, the plate body with the lateral part fit clearance of the spacing platform that sinks is 0.1-2mm (preferred 0.2-1.2 mm), the plate body with the bottom fit clearance of the spacing platform that sinks is 0.2-2mm (preferred 0.5-1 mm), the plate body is in the spacing certain activity that sinks is allowed in the platform, but because the limiting displacement of the spacing platform that sinks, its activity can not be too big. Under the action of the clamp braking pressure, the friction block can move up and down (in the Z direction); under the action of friction force during braking, the friction block can swing left and right and back and forth (in the direction of X, Y); the depth of the limiting sinking platform is less than or equal to the thickness of the plate body; the spring buckle is installed in the installation sinking platform, and the friction block is fixed on the left steel back and the right steel back by the spring buckle.
Furthermore, the back plate is of an integral structure, and is formed by integrally forming through hot forging and pressing and then machining the end part of the pin shaft and the annular clamping groove.
Further, the friction block is formed by integrally sintering the back plate and the friction body.
Further, the friction block is of a polygonal structure, preferably a quadrilateral structure, a pentagonal structure, a hexagonal structure and an octagonal structure.
Further, the value of N is one of 12, 14, 16, 18, 20 and 22, preferably 16, 18 and 20.
Further, the left steel backing and the left dovetail plate are of an integrated metal structure; the right steel back and the right dovetail plate are of an integrated metal structure.
Further, the left steel backing and the left dovetail plate can be an integrated metal structure formed by casting or forging or machining a steel plate; the right steel backing and the right dovetail plate can be of an integrated metal structure formed by casting or forging or machining a steel plate.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the utility model discloses the tubaeform spring of brake lining makes the clutch blocks unsteady, and the plane degree of friction surface can three-dimensional regulation of self-adaptation to the clutch blocks, makes the brake lining braking in-process avoid the emergence of eccentric wear phenomenon.
(2) The left steel back and the left dovetail plate of the brake pad of the utility model are of an integrated metal structure, and the right steel back and the right dovetail plate are of an integrated metal structure; the integrated metal structure design of the steel back and the dovetail plate is higher in reliability than the riveting structure or the welding structure design.
Drawings
FIG. 1 is a front view of an embodiment 1 of a powder metallurgy brake pad for a motor train unit according to the present invention;
FIG. 2 is a left side view of embodiment 1 shown in FIG. 1;
FIG. 3 is a sectional view taken along line A-A of FIG. 1;
FIG. 4 is a perspective view of embodiment 1 shown in FIG. 1;
FIG. 5 is a schematic structural view of the friction block of embodiment 1 shown in FIG. 1;
FIG. 6 is a schematic structural diagram of the back plate of embodiment 1 shown in FIG. 1;
FIG. 7 is a cross-sectional view of the belleville spring of embodiment 1 shown in FIG. 1;
FIG. 8 is a perspective view of the trumpet spring of FIG. 7;
FIG. 9 is a sectional view of the pilot hole of embodiment 1 shown in FIG. 1;
FIG. 10 is a schematic structural view of the dovetail-free side plane of the left steel backing of example 1 shown in FIG. 1;
FIG. 11 is a schematic structural view of the left steel back dovetail profile of example 1 shown in FIG. 1;
FIG. 12 is a schematic structural view of the dovetail-free side plane of the right steel backing of example 1 shown in FIG. 1;
FIG. 13 is a schematic structural view of the right steel back dovetail profile of example 1 of FIG. 1;
fig. 14 is a schematic structural view of the spring clip of embodiment 1 shown in fig. 1.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Example 1
Referring to the attached drawings, the powder metallurgy brake pad for the motor train unit comprises a left steel back 1, a right steel back 2, 18 friction blocks 3 and 18 spring buckles 4; the left steel back 1 is provided with a left dovetail plate 11, the right steel back 2 is provided with a right dovetail plate 21, and the left steel back 1 and the right steel back 2 are provided with 18 positioning holes 5; the friction block 3 comprises a back plate 31 and a friction body 32; 18 friction blocks 3 are respectively arranged on the dovetail-free side planes of the left steel back 1 and the right steel back 2; the back plate 31 is provided with a pin shaft 311, an annular clamping groove 312, a transition section 313 and a plate body 314; the pin shafts 311 respectively extend into the positioning holes 5, and the annular clamping grooves 312 are matched and clamped with the spring buckles 4; a flared spring 6 is arranged between the pin 311 and the positioning hole 5.
The trumpet spring 6 comprises a large head end 61, a middle section 62 and a small head end 63; the middle section 62 is arc-shaped and connects the big head end 61 and the small head end 63; the big end 61 is bent towards the small end 63, and the big end 61 is lower than the upper horizontal plane of the horn-shaped spring 6.
In order to adjust the elasticity of the trumpet spring 6, 8 grooves 64 are formed in the longitudinal direction of the trumpet spring 6.
The positioning hole 5 is sequentially provided with a limiting sinking platform 51, a conical sinking platform 52, a transition sinking platform 53 and a mounting sinking platform 54.
The big end 61 of the horn spring 6 is arranged on the conical surface of the conical sinking platform 52, and the big end 61 can move up and down on the conical surface of the conical sinking platform 52 under the action of braking pressure; the middle section 62 is in contact with the transition section 313 of the back plate 31, and the small end 63 is installed in the transition sink 53 in a clearance fit.
The plate body 314 is arranged in the limit sinking platform 51 in clearance fit, and the depth of the limit sinking platform 51 is less than or equal to the thickness of the plate body 314; the spring buckle 4 is installed in the installation sinking platform 54; the spring buckle 4 fixes the friction block 3 on the left steel back 1 and the right steel back 2.
The plate body 314 with the lateral part fit clearance of spacing heavy platform 51 is 1.0mm, the plate body 314 with the bottom fit clearance of spacing heavy platform 51 is 1.0mm, ensures the plate body 314 is in there is certain activity in spacing heavy platform 51, but because the limiting displacement of spacing heavy platform 51, its activity can not be too big again. Under the action of the clamp braking pressure, the friction block 3 can move up and down (in the Z direction); the friction pad 3 can swing left and right and back and forth (X, Y direction) under the action of friction force during braking.
The back plate 31 has an integral structure, and is formed by hot forging and pressing integrally, and then machining the end of the pin shaft 311 and the annular groove 312.
The friction block 3 is integrally sintered and formed by the back plate 31 and the friction body 32; the friction block 3 is of an octagonal structure, and the octagonal sides form an axially symmetric shape.
The left steel backing 1 and the left dovetail plate 11 are integrated metal structures formed by machining after casting; the right steel backing 2 and the right dovetail plate 21 are integrated metal structures machined and formed after casting.
The horn-shaped spring 6 of the powder metallurgy brake pad for the motor train unit enables the friction block 3 to float, and the friction block 3 can self-adaptively adjust the flatness of the friction surface in three dimensions, so that the eccentric wear phenomenon is avoided in the brake pad braking process. In addition, the integrated metal structure design of the steel backing and the dovetail plate has higher reliability than that of a riveting structure or a welding structure.
Example 2
The present embodiment is different from embodiment 1 only in that 9 grooves 64 are provided in the longitudinal direction of the trumpet spring 6; 16 friction blocks 3 and 16 spring buckles 4 are arranged; the left steel back 1 and the right steel back 2 are provided with 16 positioning holes 5; the fit clearance between the plate body 314 and the side part of the limit sinking platform 51 is 1.2mm, and the fit clearance between the plate body 314 and the bottom part of the limit sinking platform 51 is 0.5 mm; the left steel backing 1 and the left dovetail plate 11 are of an integrated metal structure formed by machining after forging; the right steel backing 2 and the right dovetail plate 21 are of an integrated metal structure formed by machining after forging.
The rest is the same as example 1.
Example 3
The present embodiment is different from embodiment 1 only in that 10 grooves 64 are provided in the longitudinal direction of the trumpet spring 6; 20 friction blocks 3 and 20 spring buckles 4 are arranged; the left steel back 1 and the right steel back 2 are provided with 20 positioning holes 5; the fit clearance between the plate body 314 and the side part of the limit sinking platform 51 is 0.2mm, and the fit clearance between the plate body 314 and the bottom part of the limit sinking platform 51 is 0.8 mm; the left steel backing 1 and the left dovetail plate 11 are integrated metal structures formed by machining steel plates; the right steel backing 2 and the right dovetail plate 21 are integrated metal structures formed by machining steel plates.
The rest is the same as example 1.
Example 4
The present embodiment is different from embodiment 1 only in that 6 grooves 64 are provided in the longitudinal direction of the trumpet spring 6; 22 friction blocks 3 and 22 spring buckles 4 are arranged; 22 positioning holes 5 are formed in the left steel back 1 and the right steel back 2; the fit clearance between the plate body 314 and the side part of the limit sinking platform 51 is 0.6mm, and the fit clearance between the plate body 314 and the bottom part of the limit sinking platform 51 is 0.6 mm;
the rest is the same as example 1.
Example 5
The present embodiment is different from embodiment 1 only in that 7 grooves 64 are provided in the longitudinal direction of the trumpet spring 6; 14 friction blocks 3 and 14 spring buckles 4 are arranged; the left steel back 1 and the right steel back 2 are provided with 14 positioning holes 5; the fit clearance between the plate body 314 and the side part of the limit sinking platform 51 is 2.0mm, and the fit clearance between the plate body 314 and the bottom part of the limit sinking platform 51 is 2.0 mm; the left steel backing 1 and the left dovetail plate 11 are of an integrated metal structure formed by machining after forging; the right steel backing 2 and the right dovetail plate 21 are of an integrated metal structure formed by machining after forging.
The rest is the same as example 1.
Example 6
The present embodiment is different from embodiment 1 only in that 12 grooves 64 are formed in the longitudinal direction of the trumpet spring 6; 12 friction blocks 3 and 12 spring buckles 4 are arranged; the left steel back 1 and the right steel back 2 are provided with 12 positioning holes 5; the fit clearance between the plate body 314 and the side part of the limit sinking platform 51 is 0.1mm, and the fit clearance between the plate body 314 and the bottom part of the limit sinking platform 51 is 0.2 mm; the left steel backing 1 and the left dovetail plate 11 are integrated metal structures formed by machining steel plates; the right steel backing 2 and the right dovetail plate 21 are integrated metal structures formed by machining steel plates.
The rest is the same as example 1.
Example 7
The present embodiment is different from embodiment 1 only in that 2 grooves 64 are provided in the longitudinal direction of the trumpet spring 6; 16 friction blocks 3 and 16 spring buckles 4 are arranged; the left steel back 1 and the right steel back 2 are provided with 16 positioning holes 5; the fit clearance between the plate body 314 and the side part of the limit sinking platform 51 is 1.5mm, and the fit clearance between the plate body 314 and the bottom part of the limit sinking platform 51 is 1.5 mm; the left steel backing 1 and the left dovetail plate 11 are integrated metal structures formed by machining steel plates; the right steel backing 2 and the right dovetail plate 21 are integrated metal structures formed by machining steel plates.
The rest is the same as example 1.
Example 8
The present embodiment is different from embodiment 1 only in that the flared spring 6 is provided with 3 grooves 64 in the longitudinal direction; 20 friction blocks 3 and 20 spring buckles 4 are arranged; the left steel back 1 and the right steel back 2 are provided with 20 positioning holes 5; the fit clearance between the plate body 314 and the side part of the limit sinking platform 51 is 1.6mm, and the fit clearance between the plate body 314 and the bottom part of the limit sinking platform 51 is 0.4 mm; the left steel backing 1 and the left dovetail plate 11 are of an integrated metal structure formed by machining after forging; the right steel backing 2 and the right dovetail plate 21 are of an integrated metal structure formed by machining after forging.
The rest is the same as example 1.
Example 9
The present embodiment is different from embodiment 1 only in that 4 grooves 64 are provided in the longitudinal direction of the trumpet spring 6; the friction block 3 is of a regular hexagon structure; the fit clearance between the plate body 314 and the side part of the limit sinking platform 51 is 0.8mm, and the fit clearance between the plate body 314 and the bottom part of the limit sinking platform 51 is 0.7 mm; the left steel backing 1 and the left dovetail plate 11 are of an integrated metal structure formed by machining after forging; the right steel backing 2 and the right dovetail plate 21 are of an integrated metal structure formed by machining after forging.
The rest is the same as example 1.
Example 10
The present embodiment is different from embodiment 1 only in that 5 grooves 64 are provided in the longitudinal direction of the trumpet spring 6; the friction block 3 is of a regular pentagon structure; 18 friction blocks 3 and 18 spring buckles 4 are arranged; the left steel back 1 and the right steel back 2 are provided with 18 positioning holes 5; the fit clearance between the plate body 314 and the side part of the limit sinking platform 51 is 0.5mm, and the fit clearance between the plate body 314 and the bottom part of the limit sinking platform 51 is 1.2 mm; the left steel backing 1 and the left dovetail plate 11 are integrated metal structures formed by machining steel plates; the right steel backing 2 and the right dovetail plate 21 are integrated metal structures formed by machining steel plates.
The rest is the same as example 1.
Example 11
The present embodiment is different from embodiment 1 only in that 7 grooves 64 are provided in the longitudinal direction of the trumpet spring 6; the friction block 3 is of a square structure; 18 friction blocks 3 and 18 spring buckles 4 are arranged; the left steel back 1 and the right steel back 2 are provided with 18 positioning holes 5; the fit clearance between the plate body 314 and the side part of the limit sinking platform 51 is 0.7mm, and the fit clearance between the plate body 314 and the bottom part of the limit sinking platform 51 is 0.9 mm; the left steel backing 1 and the left dovetail plate 11 are integrated metal structures formed by machining steel plates; the right steel backing 2 and the right dovetail plate 21 are integrated metal structures formed by machining steel plates.
The rest is the same as example 1.
Example 12
The present embodiment is different from embodiment 1 only in that 9 grooves 64 are provided in the longitudinal direction of the trumpet spring 6; the friction block 3 is of a regular hexagon structure; 16 friction blocks 3 and 16 spring buckles 4 are arranged; the left steel back 1 and the right steel back 2 are provided with 16 positioning holes 5; the fit clearance between the plate body 314 and the side part of the limit sinking platform 51 is 0.9mm, and the fit clearance between the plate body 314 and the bottom part of the limit sinking platform 51 is 1.8 mm; the left steel backing 1 and the left dovetail plate 11 are integrated metal structures formed by machining steel plates; the right steel backing 2 and the right dovetail plate 21 are integrated metal structures formed by machining steel plates.
The rest is the same as example 1.
The above, only be the preferred embodiment of the present invention, it is not right the utility model discloses do any restriction, all according to the utility model discloses any modification, change and equivalent structure transform that the technical essence was done to above embodiment all still belong to the technical scheme's of the utility model protection scope.
Claims (9)
1. A powder metallurgy brake pad for a motor train unit comprises a left steel backing (1), a right steel backing (2), N friction blocks (3) and N spring buckles (4); a left dovetail plate (11) is arranged on the left steel back (1), a right dovetail plate (21) is arranged on the right steel back (2), and N positioning holes (5) are formed in the left steel back (1) and the right steel back (2) in total; the friction block (3) comprises a back plate (31) and a friction body (32); the N friction blocks (3) are respectively arranged on the dovetail-free side planes of the left steel back (1) and the right steel back (2); the method is characterized in that: the back plate (31) is provided with a pin shaft (311), an annular clamping groove (312), a transition section (313) and a plate body (314); the pin shafts (311) respectively extend into the positioning holes (5), and the annular clamping grooves (312) are matched and clamped with the spring buckles (4); and a horn-shaped spring (6) is arranged between the pin shaft (311) and the positioning hole (5).
2. The powder metallurgy brake pad for motor train units according to claim 1, wherein the trumpet spring (6) comprises a large head end (61), a middle section (62) and a small head end (63); the middle section (62) is arc-shaped and is connected with the big head end (61) and the small head end (63); the big head end (61) is bent towards the small head end (63), and the big head end (61) is lower than the upper horizontal plane of the horn-shaped spring (6).
3. The powder metallurgy brake pad for motor train units according to claim 2, wherein the trumpet spring (6) is provided with 2-12 grooves (64) in the longitudinal direction.
4. The powder metallurgy brake pad for the motor train unit according to claim 1, wherein the positioning hole (5) is sequentially provided with a limiting sinking platform (51), a conical sinking platform (52), a transition sinking platform (53) and an installation sinking platform (54).
5. The powder metallurgy brake pad for the motor train unit according to claim 4, wherein the plate body (314) is installed in the limit sunken platform (51) in a clearance fit manner, and the depth of the limit sunken platform (51) is less than or equal to the thickness of the plate body (314); and a spring buckle (4) is arranged in the mounting sinking platform (54).
6. The powder metallurgy brake pad for motor train units according to claim 4, wherein the friction block (3) is integrally sintered and formed by the back plate (31) and the friction body (32).
7. The powder metallurgy brake pad for motor train units according to claim 4, wherein the friction block (3) is of a polygonal structure.
8. The powder metallurgy brake pad for motor train units according to claim 4, wherein the value of N is one of 12, 14, 16, 18, 20 and 22.
9. The powder metallurgy brake pad for motor train units according to claim 4, wherein the left steel backing (1) and the left dovetail plate (11) are of an integral metal structure; the right steel backing (2) and the right dovetail plate (21) are of an integrated metal structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020028131.1U CN211852589U (en) | 2020-01-07 | 2020-01-07 | Powder metallurgy brake pad for motor train unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020028131.1U CN211852589U (en) | 2020-01-07 | 2020-01-07 | Powder metallurgy brake pad for motor train unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211852589U true CN211852589U (en) | 2020-11-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020028131.1U Expired - Fee Related CN211852589U (en) | 2020-01-07 | 2020-01-07 | Powder metallurgy brake pad for motor train unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211852589U (en) |
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2020
- 2020-01-07 CN CN202020028131.1U patent/CN211852589U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201103 Termination date: 20220107 |