CN218670342U - Powder metallurgy brake lining - Google Patents
Powder metallurgy brake lining Download PDFInfo
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- CN218670342U CN218670342U CN202223399728.5U CN202223399728U CN218670342U CN 218670342 U CN218670342 U CN 218670342U CN 202223399728 U CN202223399728 U CN 202223399728U CN 218670342 U CN218670342 U CN 218670342U
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- powder metallurgy
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Abstract
The utility model discloses a powder metallurgy brake lining, include: a steel backing; the friction blocks are uniformly arranged on the steel back at intervals; the elastic pieces are arranged between the friction blocks and the steel backing; a plurality of spacing connection structure, spacing connection structure include connecting piece and a plurality of locating part, and the clutch blocks floats through connecting piece and steel backing and is connected, and a plurality of locating parts evenly arrange along the circumference of clutch blocks and set up, and a plurality of locating parts are connected clutch blocks and steel backing and are cooperated the restriction clutch blocks and rotate and skew. The powder metallurgy brake pad and the brake disc of the utility model can be better attached in the braking process, and the friction block can vibrate along with the brake disc, so that high-temperature abrasive dust can be smoothly discharged, and the disc surface temperature of the brake disc can be reduced; the friction blocks are limited to rotate and deviate through the matching of the limiting parts, so that the driving risk is reduced, the friction blocks are uniformly arranged at intervals, and the problem that the temperature of the disc surface of a brake disc fluctuates greatly due to the fact that the friction blocks are not uniformly cooled in the braking process is avoided.
Description
Technical Field
The utility model relates to a train braking technical field especially, relates to a powder metallurgy brake lining.
Background
A large number of fixed powder metallurgy brake pads are used in middle and high-speed motor trains in service, such as CRH5 and CJ200 motor train units. The braking mode is mainly the traditional pure air braking mode and is assisted by electric braking. Compared with a power dispersion type electric motor train unit which mainly uses electric braking and assists air braking, huge braking energy is almost completely borne by the powder metallurgy brake pad, and the requirement on the comprehensive performance of the brake pad is more strict.
The existing powder metallurgy brake pad has the following defects:
1) The friction block has a large single friction area, the heat load is concentrated in the braking process, the heat dissipation is not facilitated, and the problems of edge and corner dropping, metal embedding and the like of the friction block are easily caused;
2) The triangular or hexagonal friction block is adopted, the shape of the friction block is irregular, the heat dissipation is not uniform in the braking process, and the brake pad is easy to be worn eccentrically;
3) The triangular or hexagonal friction block is adopted, the shape of the friction block is irregular, and the whole chip removal channel of the brake pad has a closed area, so that the abrasion chips with higher temperature in the braking process are not discharged, and the whole heat dissipation effect of the brake pad is influenced;
4) When the brake disc deforms due to temperature rise in the braking process, the friction block cannot automatically adjust the height, the brake pad cannot be completely attached to the brake disc, and the braking deceleration is reduced, so that driving danger is caused;
5) The steel back of the brake pad is obtained by finish machining after casting, quality defects are difficult to control, and the manufacturing cost is high.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a powder metallurgy brake lining to the radiating effect of the clutch blocks of solving on the present powder metallurgy brake lining is poor, and the abrasive dust is difficult for discharging, and when the brake disc rose because of the temperature and produces and warp in the braking process, the clutch blocks can not the automatic adjustment height, causes the brake lining can not laminate completely with the brake disc, technical problem that braking deceleration reduces.
The above object of the present invention can be achieved by the following technical solutions:
the utility model provides a powder metallurgy brake lining, include: a steel backing; the friction blocks are uniformly arranged on the steel back at intervals; the elastic pieces are arranged between the friction blocks and the steel back; the friction block is connected with the steel back in a floating mode through the connecting piece, the limiting pieces are arranged in the circumferential direction of the friction block evenly, and the friction block is connected with the steel back in a matching mode through the limiting pieces.
The utility model discloses an among the embodiment, the clutch blocks includes the friction piece and backplate, the friction piece with the backplate is connected, the backplate passes through spacing connection structure with the steel backing is connected.
In the embodiment of the utility model, one end of the connecting piece is fixedly connected with the steel backing, and the other end of the connecting piece is connected with the backboard in a floating way; one end of the limiting part is fixedly connected with the back plate, and the other end of the limiting part can move relative to the steel back along the axial direction of the friction block.
The utility model discloses an among the embodiment, the locating part includes the spacer pin, be equipped with the spacer pin mounting hole on the backplate, be equipped with spacing hole on the steel backing, the one end of spacer pin with spacer pin mounting hole interference fit, the other end of spacer pin with spacing hole clearance fit.
The utility model discloses an among the embodiment, the connecting piece includes the rivet, be equipped with a plurality of rivet mounting holes on the steel backing, be equipped with central mounting hole on the backplate, be equipped with the centre bore on the friction body, the one end of rivet is passed in proper order the centre bore central mounting hole and rivet mounting hole and riveting form the riveting head, the rivet with central mounting hole with centre bore clearance fit, the rivet with rivet mounting hole interference fit.
The utility model discloses an among the embodiment, be equipped with spacing shoulder on the rivet, the steel backing by spacing in the riveting head with between the spacing shoulder.
The utility model discloses an among the embodiment, be equipped with the rivet mounting groove on the steel backing, the riveting head is located in the rivet mounting groove.
The utility model discloses an among the embodiment, the friction member sintering is fixed on the backplate, be equipped with a plurality of material holes of grabbing on the backplate.
In the embodiment of the present invention, the friction block is cylindrical.
The utility model discloses an among the embodiment, the elastic component includes the dish spring, the dish spring cover is established the outside of connecting piece is a plurality of the locating part is arranged around the dish spring.
In an embodiment of the present invention, the steel backing is made by rolling a profile.
The utility model discloses an among the embodiment, the steel backing has relative front and the back that sets up, and is a plurality of the clutch blocks evenly the interval sets up on the front, the back is equipped with the dovetail that is used for being connected with arresting gear.
The utility model has the characteristics and advantages that:
according to the powder metallurgy brake pad, the friction blocks are in floating connection with the steel back through the connecting pieces, and the elastic piece is arranged between the friction blocks and the steel back, so that the friction blocks can float along the axial direction of the friction blocks, and on one hand, the powder metallurgy brake pad can be better attached to a brake disc in the braking process; on the other hand, the friction block is beneficial to vibrating along with the brake disc in the braking process, so that high-temperature abrasive dust is smoothly discharged, and the disc surface temperature of the brake disc is reduced; in addition, the friction blocks are limited to rotate and deviate through the matching of the limiting parts, so that the driving risk is reduced, the friction blocks are uniformly arranged at intervals, and the phenomenon that the temperature of the disc surface of the brake disc fluctuates greatly due to the fact that the friction blocks dissipate heat unevenly in the braking process is avoided.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1A is a schematic front structural view of a powder metallurgy brake pad of the present invention;
FIG. 1B is a schematic view of the back side structure of the powder metallurgy brake pad of the present invention;
fig. 2A is a schematic front structural view of the middle steel backing of the present invention;
fig. 2B is a schematic view of the back structure of the middle steel backing of the present invention.
FIG. 3 is a cross-sectional view of a powder metallurgy brake pad according to the present invention;
FIG. 4 is a schematic structural view of the friction block of the present invention;
fig. 5 is a schematic structural view of the middle back plate of the present invention;
fig. 6 is a schematic view of the structure of the middle back plate and the limit pin of the present invention;
FIG. 7 is a schematic view of the structure of the rivet of the present invention;
fig. 8 is a schematic structural view of the middle disc spring of the present invention.
In the figure:
11. a steel backing; 111. a limiting hole; 112. a rivet mounting hole; 113. a dovetail block; 114. a rivet mounting groove; 12. a friction block; 121. a friction body; 122. a back plate; 123. a limit pin mounting hole; 124. a central mounting hole; 124. a central bore; 125. a material grabbing hole; 13. a limiting connection structure; 131. a limiting member; 132. a connecting member; 133. a spacing pin; 134. riveting; 135. riveting the head; 136. a limiting shoulder; 137. a nail head; 14. an elastic member; 141. a disc spring.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1A, fig. 1B and fig. 3, the utility model provides a powder metallurgy brake lining, include: a steel backing 11; a plurality of friction blocks 12 uniformly arranged on the steel back 11 at intervals; a plurality of elastic pieces 14 arranged between the plurality of friction blocks 12 and the steel back 11; a plurality of spacing connection structure 13, spacing connection structure 13 includes connecting piece 132 and a plurality of locating part 131, and the clutch blocks 12 floats through connecting piece 132 and steel backing 11 and is connected, and a plurality of locating part 131 evenly arranges the setting along the circumference of clutch blocks 12, and a plurality of locating part 131 connect clutch blocks 12 and steel backing 11 and cooperate the restriction clutch blocks 12 to rotate and squint.
In the powder metallurgy brake pad of the utility model, the friction blocks 12 are in floating connection with the steel back 11 through the connecting pieces 132, and the elastic piece 14 is arranged between the friction blocks 12 and the steel back 11, so that the friction blocks 12 can float along the axial direction thereof, and on one hand, the powder metallurgy brake pad can be better attached to a brake disc in the braking process; on the other hand, the friction block 12 can vibrate along with the brake disc in the braking process, so that high-temperature abrasive dust is smoothly discharged, and the disc surface temperature of the brake disc is reduced; in addition, compare in setting up anti-rotation structure or utilizing a plurality of clutch blocks 12 to restrict mutually between a plurality of clutch blocks 12 and rotate, the utility model discloses a set up a plurality of locating parts 131 and restrict clutch blocks 12 and take place rotation and skew, can avoid the abrasive dust exhaust passage that forms between a plurality of clutch blocks 12 to have enclosed area and do not utilize chip removal and heat dissipation to a plurality of clutch blocks 12 set up at interval uniformly, avoid clutch blocks 12 to dispel the heat inhomogeneous and cause the quotation temperature of brake disc to produce great fluctuation in braking process.
As shown in fig. 1A, the inventors found that the arrangement uniformity of the friction blocks 12 is closely related to the braking stability of the powder metallurgy brake pad, which is a component directly receiving braking force and receives a great amount of heat during high-speed braking. The utility model discloses being arranged a plurality of clutch blocks 12 on the steel backing 11 equidistantly roughly, can guaranteeing more evenly that the heat that every clutch block 12 bore by bigger degree, the interval has even guaranteed every clutch block 12's rate of heat dissipation's uniformity between a plurality of clutch blocks 12 simultaneously, more is favorable to the whole coefficient of friction that remains stable of powder metallurgy brake lining.
Specifically, as shown in fig. 2A and 2B, the steel back 11 is finished by rolling a profile. The manufacturing defects are few, so that the processing qualified rate is improved, and the processing cost is reduced. The surface of the steel back 11 is plated with copper and is approximately in an irregular pentagon shape. The steel backing 11 has the relative front and back that sets up, and a plurality of clutch blocks 12 evenly interval sets up on the front of steel backing 11, and the back of steel backing 11 is equipped with two cross-sections for the forked tail piece 113 of inverted trapezoid, and two forked tail piece 113's forked tail angle is equipped with the chamfer. A dovetail groove is formed between the two dovetail blocks 113 for connection to a brake.
As shown in fig. 1A, in the embodiment of the present invention, the friction blocks 12 are substantially cylindrical, so as to further improve the uniformity of heat dissipation of the friction blocks 12, avoid the friction blocks 12 from eccentric wear, and form a wear debris discharging channel between the plurality of cylindrical friction blocks 12, which is more favorable for discharging high-temperature wear debris.
As shown in fig. 3 and 4, the friction block 12 includes a friction body 121 and a back plate 122, the friction body 121 is connected to the back plate 122, and the back plate 122 is connected to the steel back 11 through a spacing connection structure 13. Specifically, the friction body 121 is fixed to the back plate 122 by sintering. The friction body 121 has a substantially cylindrical block structure. The outer edge of the back plate 122 is flush with the outer edge of the friction body 121. Referring to fig. 5, a plurality of material catching holes 125 are formed on the back plate 122 to improve adhesion between the friction body 121 and the back plate 122. The plurality of material catching holes 125 are uniformly arranged along the circumferential direction of the back plate 122. The back plate 122 is a substantially circular plate-shaped structure and is made of a steel plate with a copper-plated surface.
As shown in fig. 3, 5 and 6, in the embodiment of the present invention, one end of the limiting member 131 is fixedly connected to the back plate 122, and the other end of the limiting member 131 can move along the axial direction of the friction block 12 relative to the steel back 11. The limiting piece 131 can abut against the inner wall surface of the limiting hole 111 to limit the friction blocks 12 from rotating and shifting along the plane extension direction of the steel back 11, so that the driving risk is reduced, and the plurality of friction blocks 12 can keep a distance, but the other end of the limiting piece 131 can move along the axial direction of the friction blocks 12, so that the axial floating of the friction blocks 12 cannot be interfered. Specifically, as shown in fig. 4, 5 and 6, the limiting member 131 may include a limiting pin 133, the back plate 122 is provided with a limiting pin installation hole 123, and one end of the limiting pin 133 is in interference fit with the limiting pin installation hole 123. Referring to fig. 2A and 2B, the steel backing 11 is provided with a limiting hole 111, and the other end of the limiting pin 133 is in clearance fit with the limiting hole 111. The material of the stopper pin 133 may be stainless steel. Optionally, the limiting member is fixedly connected to the back plate by welding or other methods.
As shown in fig. 3, in the embodiment of the present invention, one end of the connecting member 132 is fixedly connected to the steel backing 11, and the other end of the connecting member 132 is connected to the back plate 122 in a floating manner. The back plate 122 abuts against the back plate 122 by the elastic restoring force of the elastic member 14. Specifically, as shown in fig. 4 and 5, the back plate 122 is provided with a central mounting hole 124, and the friction body 121 is provided with a central hole 124. As shown in fig. 2A and 2B, the steel back 11 is provided with a plurality of rivet holes 112. As shown in connection with fig. 7, the connector 132 includes a rivet 134. One end of the rivet 134 passes through the central hole 124, the central mounting hole 124 and the rivet mounting hole 112 in sequence and is riveted to form a rivet head 135, the rivet 134 is in clearance fit with the central mounting hole 124 and the central hole 124, and the rivet 134 is in interference fit with the rivet mounting hole 112. The back plate 122 abuts against the head 137 of the rivet 134 by the elastic restoring force of the elastic member 14. Optionally, the connecting piece is fixedly connected with the steel backing by welding or other methods.
As shown in fig. 3 and 7, the rivet 134 is provided with a limit shoulder 136, and the steel back 11 is limited between the rivet head 135 and the limit shoulder 136, so as to improve the stability of the connection between the rivet 134 and the steel back 11.
As shown in fig. 2B, 3 and 7, the steel backing 11 is provided with a rivet fitting groove 114, and the riveting head 135 is located in the rivet fitting groove 114.
As shown in fig. 3 and fig. 8, in the embodiment of the present invention, the elastic member 14 includes a disc spring 141, the disc spring 141 is sleeved outside the connecting member 132, and the plurality of limiting members 131 are uniformly arranged around the disc spring 141 along the circumferential direction of the friction block 12. Specifically, the disc spring 141 and the connecting member 132 are concentrically arranged, and the two limiting members 131 are symmetrically arranged on two sides of the disc spring 141. The material of the disc spring 141 may be stainless steel.
The above description is only for the embodiments of the present invention, and those skilled in the art can make various changes or modifications to the embodiments of the present invention according to the disclosure of the application document without departing from the spirit and scope of the present invention.
Claims (12)
1. A powder metallurgy brake pad, comprising:
a steel backing;
the friction blocks are uniformly arranged on the steel back at intervals;
the elastic pieces are arranged between the friction blocks and the steel back;
the friction block is connected with the steel back in a floating mode through the connecting piece, the limiting pieces are arranged in the circumferential direction of the friction block evenly, and the friction block is connected with the steel back in a matching mode through the limiting pieces.
2. Powder metallurgy brake lining according to claim 1,
the friction block comprises a friction body and a back plate, the friction body is connected with the back plate, and the back plate is connected with the steel back through the limiting connection structure.
3. Powder metallurgy brake lining according to claim 2,
one end of the connecting piece is fixedly connected with the steel backing, and the other end of the connecting piece is in floating connection with the back plate; one end of the limiting part is fixedly connected with the back plate, and the other end of the limiting part can move relative to the steel back along the axial direction of the friction block.
4. Powder metallurgy brake lining according to claim 3,
the limiting part comprises a limiting pin, a limiting pin mounting hole is formed in the back plate, a limiting hole is formed in the steel back, one end of the limiting pin is in interference fit with the limiting pin mounting hole, and the other end of the limiting pin is in clearance fit with the limiting hole.
5. Powder metallurgy brake pad according to claim 3,
the connecting piece includes the rivet, be equipped with a plurality of rivet mounting holes on the steel backing, be equipped with central mounting hole on the backplate, be equipped with the centre bore on the friction body, the one end of rivet passes in proper order the centre bore central mounting hole and rivet mounting hole and riveting form the riveting head, the rivet with central mounting hole with centre bore clearance fit, the rivet with rivet mounting hole interference fit.
6. Powder metallurgy brake lining according to claim 5,
the rivet is provided with a limiting shoulder, and the steel backing is limited between the riveting head and the limiting shoulder.
7. Powder metallurgy brake lining according to claim 5,
the steel backing is provided with a rivet mounting groove, and the riveting head is positioned in the rivet mounting groove.
8. Powder metallurgy brake pad according to claim 2,
the friction body is fixed on the back plate in a sintering mode, and a plurality of material grabbing holes are formed in the back plate.
9. Powder metallurgy brake pad according to claim 1,
the friction block is cylindrical.
10. Powder metallurgy brake lining according to claim 1,
the elastic part comprises a disc spring, the disc spring is sleeved outside the connecting part, and the plurality of limiting parts are arranged around the disc spring.
11. Powder metallurgy brake pad according to claim 1,
the steel backing is made by finish machining of a rolled profile.
12. Powder metallurgy brake lining according to claim 1,
the steel backing has relative front and back that sets up, and a plurality of the clutch blocks evenly interval sets up on the front, the back is equipped with the dovetail that is used for being connected with arresting gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223399728.5U CN218670342U (en) | 2022-12-19 | 2022-12-19 | Powder metallurgy brake lining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223399728.5U CN218670342U (en) | 2022-12-19 | 2022-12-19 | Powder metallurgy brake lining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218670342U true CN218670342U (en) | 2023-03-21 |
Family
ID=85549893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223399728.5U Active CN218670342U (en) | 2022-12-19 | 2022-12-19 | Powder metallurgy brake lining |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218670342U (en) |
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2022
- 2022-12-19 CN CN202223399728.5U patent/CN218670342U/en active Active
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