CN209781530U - Non-dovetail type powder metallurgy brake pad for high and cold train - Google Patents
Non-dovetail type powder metallurgy brake pad for high and cold train Download PDFInfo
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- CN209781530U CN209781530U CN201920267247.8U CN201920267247U CN209781530U CN 209781530 U CN209781530 U CN 209781530U CN 201920267247 U CN201920267247 U CN 201920267247U CN 209781530 U CN209781530 U CN 209781530U
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- friction piece
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- alpine
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- 238000004663 powder metallurgy Methods 0.000 title claims abstract description 21
- 241000357293 Leptobrama muelleri Species 0.000 claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 2
- 239000004576 sand Substances 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 4
- 239000012535 impurity Substances 0.000 abstract description 3
- 238000005299 abrasion Methods 0.000 description 8
- 230000002159 abnormal effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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Abstract
The utility model discloses a non-dovetail type powder metallurgy brake pad for alpine train, including non-dovetail type steel back and brake pad friction piece, brake pad friction piece is the elliptic cylindrical structure that has spacing face, is provided with a plurality of location mounting holes on the non-dovetail type steel back, all is provided with anti-spin dog by each location mounting hole, all installs breach spherical spring in each location mounting hole, and anti-spin dog cooperates with spacing face and limits the degree of freedom of brake pad friction piece; gaps are formed between each brake pad friction piece and the adjacent brake pad friction pieces, so that impurities such as ice sand and the like are smoothly discharged; the design that the friction block is fixed by arranging a positioning pin on the brake pad for the existing motor train unit is cancelled, and the degree of freedom of the friction block of the brake pad is limited by matching a limiting surface and a rotation-preventing stop block; the axial floating function of the brake pad friction piece is realized through the axial telescopic assembly structure of the notch spherical spring and the butterfly-shaped clamp spring, the maximum-area fit between the friction piece and the brake disc can be achieved during braking, and the optimal balanced braking effect is achieved.
Description
Technical Field
the utility model relates to a motor car braking technical field especially relates to a non-dovetail type powder metallurgy brake lining for alpine train.
background
The environmental temperature in the alpine region is lower than minus 40 ℃, and the motor train units often have sand wind, frost, rain and snow storms at the speed of 300-350 km/h and above, the abnormal abrasion phenomenon of the brake disc is particularly serious, the main reason is that sand grains or external hard foreign matters in a roadbed are mixed in ice and snow under the action of strong wind in the running process of a train, and the brake pad and the brake clamp are not easy to discharge, when the train brakes, the brake pad and the brake disc rub against each other, the external hard particle foreign matter is clamped between the friction surfaces of the brake disc and the brake pad to scratch the brake disc, the hard foreign matter grinds the brake disc to generate metal abrasive dust or cut metal wires to cause the occurrence of metal melt, the abrasion condition of the brake disc is accelerated by the condition, therefore, the brake pad which can solve the abnormal scratch phenomenon of the brake disc in the environment of severe cold and ice weather and prolong the service life of the brake disc is very necessary.
in some existing brake pads for motor train units, a mode of combining a positioning pin and a positioning hole is usually adopted to position and fix a friction piece of the brake pad, but actually, the positioning pin is weak and easy to break, and the positioning pin is difficult to take out when broken in the positioning hole, so that the brake pad for the motor train unit with an optimized design is needed.
SUMMERY OF THE UTILITY MODEL
in order to solve the technical problem or one of the technical problems, the utility model provides a non-dovetail type powder metallurgy brake pad for alpine train, including non-dovetail type steel back and brake pad friction piece, brake pad friction piece is the elliptic cylindrical structure that has spacing face, be provided with a plurality of location mounting holes on the non-dovetail type steel back, every location mounting hole all is provided with anti-rotation block, every location mounting hole all is installed with breach spherical spring in, anti-rotation block with spacing face cooperation and restriction the degree of freedom of brake pad friction piece;
The center of the brake pad friction piece is also provided with a locking pin, and the locking pin of the brake pad friction piece extends into the positioning mounting hole of the non-dovetail steel back through the notch spherical spring;
Gaps are reserved between each brake pad friction piece and the adjacent brake pad friction pieces.
by adopting the scheme, the design that the friction block is fixed by arranging the positioning pin on the brake pad for the motor train unit is cancelled, the degree of freedom of the brake pad friction block is limited by the matching of the limiting surface and the anti-rotation stop block, and the brake pad friction block is prevented from rotating excessively; large gaps are formed among the brake pad friction pieces, and the gaps are continuous and smooth without dead angles, so that impurities such as ice sand, frozen snow, abrasive dust and the like are smoothly discharged; the axial floating function of the brake pad friction piece is realized through the axial telescopic assembly structure of the notch spherical spring and the butterfly-shaped clamp spring, the maximum-area fit between the friction piece and the brake disc can be achieved during braking, and the optimal balanced braking effect is achieved.
Further, the length of the locking pin is larger than the sum of the thicknesses of the notch spherical spring and the non-dovetail steel back, and an annular groove is formed in the part, exceeding the pin head, of the locking pin.
Furthermore, the surface of the anti-rotation stop block is the front surface of the non-dovetail steel back, a plurality of butterfly clamp spring clamping grooves are formed in the back surface of the non-dovetail steel back, each butterfly clamp spring clamping groove is annular, and the circle center of each butterfly clamp spring clamping groove is located at the same point as that of the positioning and mounting hole.
Further, a butterfly-shaped clamp spring is arranged in the butterfly-shaped clamp spring clamping groove, the butterfly-shaped clamp spring is of a circular butterfly-shaped structure, and one end of the butterfly-shaped clamp spring is an opening end.
Furthermore, the middle part of the butterfly-shaped clamp spring is provided with a clamp ring matched with the annular groove of the locking pin, and an outlet channel of the clamp ring is communicated with the opening end.
Furthermore, each anti-rotation stop block is in clearance fit with the limiting surface of the corresponding brake pad friction block and is in parallel constraint.
furthermore, the notched spherical spring is of a hemispherical dimple structure and comprises an annular bottom surface, an edge notch, an inwards concave ball socket and a central opening, the annular bottom surface is in contact fit with the bottom surface of the positioning mounting hole, and the inwards concave ball socket is in contact fit with the bottom surface of the brake pad friction piece.
Further, the brake lining friction piece further comprises a cylindrical back plate and a cylindrical friction body arranged below the cylindrical back plate, wherein the cross sections of the cylindrical back plate and the cylindrical friction body are the same in shape and size, and a limiting surface is arranged on a cylindrical curved surface.
Further, the structure of the non-dovetail steel back is a plate-type structure, the back surface of the non-dovetail steel back is provided with an installation guide groove, and the two ends of the non-dovetail steel back are provided with positioning holes.
Further, the distribution number of the brake pad friction pieces on the ring surfaces with different radiuses of the non-dovetail steel backing is in direct proportion to the square of the average friction radius of the ring surfaces.
The beneficial effects of the utility model reside in that:
(1) Large gaps are formed among the brake pad friction pieces, and the gaps are continuous and smooth without dead angles, so that impurities such as ice sand, frozen snow, abrasive dust and the like are smoothly discharged;
(2) The brake pad for the motor train unit is free of the design that the brake pad for the existing motor train unit is provided with the positioning pin for fixing the friction piece, the degree of freedom of the brake pad friction piece is limited through the matching of the limiting surface and the anti-rotation stop block, the brake pad friction piece is prevented from rotating excessively, and the occurrence of accidents caused by breakage or bending of the positioning pin is avoided due to the fact that the positioning pin is not designed;
(3) the axial floating function of the brake pad friction piece is realized through the axial telescopic assembly structure of the notch spherical spring and the butterfly-shaped clamp spring, the maximum-area fit between the friction piece and the brake disc can be achieved during braking, and the optimal balanced braking effect is achieved;
(4) The brake pad is convenient to disassemble and replace, stress concentration can be avoided by adopting the round brake pad friction piece, and the phenomena of block falling and edge falling in the use process can be effectively inhibited;
(5) the round brake pad friction piece has stable friction coefficient and low abrasion, and simultaneously has high heat conduction, heat resistance, higher anti-bonding performance, higher thermophysical performance and mechanical performance. The brake has long service life, stable braking and low noise, does not generate abnormal groove-shaped abrasion on the brake disc, and can meet the requirement of passenger car braking of the high and cold motor train unit with the speed per hour of 300-350 kilometers and above.
Drawings
FIG. 1 is a front perspective view of a non-dovetail powder metallurgy brake pad for an alpine train according to the present invention;
FIG. 2 is a rear perspective view of the non-dovetail powder metallurgy brake pad for the alpine train of the present invention;
FIG. 3 is a diagram of the non-dovetail powder metallurgy brake pad for alpine trains without a brake pad friction piece;
FIG. 4 is a state diagram of the non-dovetail powder metallurgy brake pad for alpine trains of the present invention without a butterfly clamp spring;
fig. 5 is a perspective view of the notched spherical spring of the present invention;
Fig. 6 is another perspective view of the notched spherical spring according to the present invention;
Fig. 7 is a perspective view of the brake pad friction piece of the present invention;
FIG. 8 is a perspective view of the brake pad friction pin head of the present invention;
FIG. 9 is a schematic view of the annular groove of the brake pad friction roller of the present invention;
fig. 10 is a perspective view of the butterfly clip of the present invention.
in the figure, 1, a non-dovetail steel back; 2. a brake pad friction piece; 3. a notched spherical spring; 101. positioning the mounting hole; 102. an anti-rotation stop block; 103. a butterfly-shaped clamp spring clamping groove; 104. a butterfly clamp spring; 105. positioning holes; 201. a limiting surface; 202. a locking pin; 203. a cylindrical back plate; 204. a cylindrical friction body; 205. a bottom surface; 301. an annular bottom surface; 302. an edge gap; 303. a concave ball socket; 304. a central opening; 1041. an open end; 1042. a snap ring; 2021. an annular groove.
Detailed Description
Embodiments according to the present invention will be described with reference to fig. 1 to 10.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and the present invention is not limited to the specific embodiments disclosed below.
The embodiment of the utility model provides a non-dovetail type powder metallurgy brake lining for alpine train, including non-dovetail type steel backing 1 and brake lining friction piece 2, brake lining friction piece 2 is the elliptic cylindrical structure that has spacing face 201, be provided with a plurality of location mounting holes 101 on the non-dovetail type steel backing 1, every location mounting hole 101 is all provided with anti-rotation block 102 by the side, all install breach spherical spring 3 in every location mounting hole 101, anti-rotation block 102 with spacing face 201 cooperation and restriction brake lining friction piece 2's degree of freedom;
the brake pad friction piece 2 is also provided with a locking pin 202 in the center, and the locking pin 202 of the brake pad friction piece 2 extends into the positioning mounting hole 101 of the non-dovetail steel back 1 through the notch spherical spring 3;
Gaps are reserved between each brake pad friction piece 2 and the brake pad friction piece 2 adjacent to the brake pad friction piece.
By adopting the technical scheme, in the embodiment, the brake pad friction pieces 2 arranged on the non-dovetail steel backing 1 are provided with large gaps, so that the ventilation and heat dissipation of air are increased, the heating temperature rise of the whole brake pad in the braking process is reduced, the abrasion of the brake pad friction pieces 2 during braking and the wrapped sand, ice and snow or external hard foreign matters caused by rain, snow and wind and sand weather are more convenient to discharge in time, and the scratch to the brake disc is reduced; the design that the brake pad for the motor train unit is provided with the positioning pin for fixing the friction piece is cancelled, the degree of freedom of the brake pad friction piece 2 is limited through the matching of the limiting surface 201 and the anti-rotation stop block 102, the rotation of the brake pad friction piece is prevented, and the occurrence of accidents caused by the breakage or bending of the positioning pin is avoided due to the cancellation of the design of the positioning pin; the axial floating function of the brake pad friction piece 2 is realized through the axial telescopic assembly structure of the notch spherical spring 3 and the butterfly-shaped clamp spring 104, the maximum-area fit between the friction piece and the brake disc can be achieved during braking, and the optimal balanced braking effect is achieved.
On the basis of the above embodiment, the length of the locking pin 202 is greater than the sum of the thicknesses of the notched spherical spring 3 and the non-dovetail steel backing 1, and an annular groove 2021 is formed in the pin head excess part of the locking pin 202.
In practical implementation, the notched spherical springs 3 with different specifications are usually selected according to different train running environments, when a train runs in a high and cold area, due to the fact that the environment is severe, ice, snow and gravel are brought into gaps of brake pads, the notched spherical springs 3 with six or eight notches are adopted, the multi-notch notched spherical springs 3 are good in compression and extension performance, and good in ventilation and heat dissipation performance, so that the ice, snow and gravel entering the brake pads are easier to remove, workers can clean conveniently, and potential safety hazards are reduced; the train advances to the plateau area that the slope is gentler, because its operational environment is superior to plateau area and takes the steep area of slope of the operation of the semi-braking of floodgate, consequently chooses the less breach spherical spring 3 of breach for use usually, and this kind of breach spherical spring 3 has the characteristics that spring rate is big, more is fit for using on gentle track, because alpine train use non-dovetail type powder metallurgy brake lining design for the train that alpine region went, consequently the utility model discloses a many jaggies breach spherical spring 3 is in order to adapt to the train environment of traveling of alpine.
Further, the preferred embodiment of the utility model discloses a do, with the place face of preventing revolving dog 102 is the front of non-dovetail steel backing 1, the back of non-dovetail steel backing 1 is provided with a plurality of butterfly-shaped jump ring draw-in grooves 103, and every butterfly-shaped jump ring draw-in groove 103 is the annular, the centre of a circle of butterfly-shaped jump ring draw-in groove 103 with the centre of a circle of location mounting hole 101 is on the same point.
On the basis of above-mentioned embodiment, furtherly, the embodiment of the utility model discloses a do, be provided with butterfly jump ring 104 in the butterfly jump ring draw-in groove 103, butterfly jump ring 104 is circular butterfly column structure, butterfly jump ring 104's one end is open end 1041.
On the basis of the above embodiment, further, a snap ring 1042 matched with the annular groove 2021 of the locking pin 202 is disposed in the middle of the butterfly clamp spring 104, and an outlet channel of the snap ring 1042 is communicated with the open end 1041.
The brake pad friction pieces 2 are distributed on the non-dovetail steel back 1 in a staggered manner to increase air circulation and heat dissipation of the channel, reduce the temperature rise of the whole brake pad during braking, and are clamped by matching the annular groove 2021 of the locking pin 202 with the clamping ring 1042 of the butterfly clamp spring 104.
on the basis of the above embodiment, further, each anti-rotation stopper 102 is in clearance fit with and parallel constraint with the limiting surface 201 of the corresponding brake pad friction piece 2.
On the basis of the above embodiment, further, the notched spherical spring has a hemispherical dimple structure, and includes an annular bottom surface 301, an edge notch 302, a recessed ball socket 303 and a central opening 304, where the annular bottom surface 301 is in contact fit with the bottom surface of the positioning and mounting hole 101, the recessed ball socket 303 is in contact fit with the bottom surface 205 of the brake pad friction piece 2, and the edge notch 302 facilitates flexible extension and retraction of the spring.
On the basis of the above embodiment, further, the brake pad friction piece 2 further includes a cylindrical back plate 203 and a cylindrical friction body 204 disposed below the cylindrical back plate 203, and the cross-sectional shapes and sizes of the cylindrical back plate 203 and the cylindrical friction body 204 are the same and both are provided with a limiting surface 201 on a cylindrical curved surface.
By adopting the technical scheme, the brake pad friction device is convenient to disassemble and replace, the circular brake pad friction device 2 can avoid stress concentration, the phenomena of block falling and edge falling in the using process can be effectively inhibited, the circular brake pad friction device 2 has stable friction coefficient and low abrasion, and meanwhile, the brake pad friction device has high heat conduction, heat resistance, higher anti-bonding performance, higher thermophysical performance and mechanical performance, long service life, stable braking, low noise, no abnormal groove-shaped abrasion to a brake disc, and can meet the requirement of passenger car braking of a high and cold motor train unit with the speed per hour of 300-350 kilometers and above.
On the basis of the above embodiment, further, the structure of the non-dovetail steel back 1 is a plate-type structure with a mounting guide groove on the back surface, and the two ends of the non-dovetail steel back 1 are provided with positioning holes 105.
furthermore, the distribution quantity of the brake pad friction shoes 2 on the ring surfaces with different radiuses of the non-dovetail steel backing 1 is in direct proportion to the square of the average friction radius of the ring surfaces, so that the brake energy borne by the brake pad friction shoes 2 in unit area is the same, the abrasion of the brake pad friction shoes 2 in unit area is the same, and the service life of the brake pad can be effectively prolonged.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a cold-high train is with non-dovetail type powder metallurgy brake lining which characterized in that: the brake pad friction piece comprises a non-dovetail steel back (1) and a brake pad friction piece (2), wherein the brake pad friction piece (2) is of an elliptic cylindrical structure with a limiting surface (201), a plurality of positioning mounting holes (101) are formed in the non-dovetail steel back (1), an anti-rotation stop block (102) is arranged beside each positioning mounting hole (101), a notch spherical spring (3) is arranged in each positioning mounting hole (101), and the anti-rotation stop block (102) is matched with the limiting surface (201) and limits the degree of freedom of the brake pad friction piece (2);
The brake pad friction rotor (2) is also provided with a locking pin (202) at the center, and the locking pin (202) of the brake pad friction rotor (2) extends into the positioning and mounting hole (101) of the non-dovetail steel back (1) through the notch spherical spring (3);
Gaps are reserved between each brake pad friction piece (2) and the adjacent brake pad friction pieces (2).
2. the non-dovetail type powder metallurgy brake pad for the alpine train according to claim 1, wherein: the length of the locking pin (202) is greater than the sum of the thicknesses of the notch spherical spring (3) and the non-dovetail steel back (1), and an annular groove (2021) is formed in the pin head exceeding part of the locking pin (202).
3. The non-dovetail type powder metallurgy brake pad for the alpine train according to claim 1, wherein: the anti-rotation check block (102) is arranged on the front face of the non-dovetail steel back (1), a plurality of butterfly clamp spring clamping grooves (103) are formed in the back face of the non-dovetail steel back (1), each butterfly clamp spring clamping groove (103) is annular, and the circle center of each butterfly clamp spring clamping groove (103) is located at the same point as that of the positioning mounting hole (101).
4. The non-dovetail type powder metallurgy brake pad for the alpine train according to claim 3, wherein: a butterfly clamp spring (104) is arranged in the butterfly clamp spring clamping groove (103), the butterfly clamp spring (104) is of a circular butterfly-shaped structure, and one end of the butterfly clamp spring (104) is an opening end (1041).
5. The non-dovetail type powder metallurgy brake pad for the alpine train according to claim 4, wherein: the middle part of the butterfly clamp spring (104) is provided with a clamp ring (1042) matched with the annular groove (2021) of the locking pin (202), and an outlet channel of the clamp ring (1042) is communicated with the opening end (1041).
6. The non-dovetail type powder metallurgy brake pad for the alpine train according to claim 1, wherein: each anti-rotation stop block (102) is in clearance fit with the limiting surface (201) of the corresponding brake pad friction piece (2) and is in parallel constraint.
7. the non-dovetail type powder metallurgy brake pad for the alpine train according to claim 1, wherein: the notch spherical spring (3) is of a hemispherical dimple structure and comprises an annular bottom surface (301), an edge notch (302), an inwards concave ball socket (303) and a central opening (304), the annular bottom surface (301) is in contact fit with the bottom surface of the positioning mounting hole (101), and the inwards concave ball socket (303) is in contact fit with the bottom surface (205) of the brake pad friction piece (2).
8. The non-dovetail type powder metallurgy brake pad for the alpine train according to claim 1, wherein: the brake pad friction piece (2) further comprises a cylindrical back plate (203) and a cylindrical friction body (204) arranged below the cylindrical back plate (203), wherein the cross sections of the cylindrical back plate (203) and the cylindrical friction body (204) are the same in shape and size, and a limiting surface (201) is arranged on a cylindrical curved surface.
9. The non-dovetail type powder metallurgy brake pad for the alpine train according to claim 1, wherein: the non-dovetail steel back (1) is of a plate type structure, the back face of the non-dovetail steel back is provided with an installation guide groove, and positioning holes (105) are formed in two ends of the non-dovetail steel back (1).
10. The non-dovetail type powder metallurgy brake pad for the alpine train according to claim 1, wherein: the distribution quantity of the brake lining friction pieces (2) on the ring surfaces of the non-dovetail steel backing (1) with different radiuses is in direct proportion to the square of the average friction radius of the ring surfaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920267247.8U CN209781530U (en) | 2019-03-04 | 2019-03-04 | Non-dovetail type powder metallurgy brake pad for high and cold train |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920267247.8U CN209781530U (en) | 2019-03-04 | 2019-03-04 | Non-dovetail type powder metallurgy brake pad for high and cold train |
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| Publication Number | Publication Date |
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| CN209781530U true CN209781530U (en) | 2019-12-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920267247.8U Active CN209781530U (en) | 2019-03-04 | 2019-03-04 | Non-dovetail type powder metallurgy brake pad for high and cold train |
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| CN (1) | CN209781530U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113071451A (en) * | 2021-03-22 | 2021-07-06 | 中车株洲电力机车有限公司 | Tread cleaning device and friction block thereof |
-
2019
- 2019-03-04 CN CN201920267247.8U patent/CN209781530U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113071451A (en) * | 2021-03-22 | 2021-07-06 | 中车株洲电力机车有限公司 | Tread cleaning device and friction block thereof |
| CN113071451B (en) * | 2021-03-22 | 2023-08-08 | 中车株洲电力机车有限公司 | Tread cleaning device and friction block thereof |
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Effective date of registration: 20210401 Address after: 102200 No. c1042, 2nd floor, building 16, No. 37 courtyard, Chaoqian Road, science and Technology Park, Changping District, Beijing Patentee after: Beijing Pulan Rail Transit Technology Co., Ltd Patentee after: SHANDONG HEZE DETONG NEW MATERIAL TECHNOLOGY Co.,Ltd. Address before: No. 510, gate 40, binshuili, binshuidao, Hexi District, Tianjin 300060 Patentee before: Guo Jiaxin |