CN108061117A - A kind of EMU brake lining - Google Patents
A kind of EMU brake lining Download PDFInfo
- Publication number
- CN108061117A CN108061117A CN201711394956.4A CN201711394956A CN108061117A CN 108061117 A CN108061117 A CN 108061117A CN 201711394956 A CN201711394956 A CN 201711394956A CN 108061117 A CN108061117 A CN 108061117A
- Authority
- CN
- China
- Prior art keywords
- brake lining
- friction
- circular
- adjusting pad
- brake
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 241000357293 Leptobrama muelleri Species 0.000 claims abstract description 22
- 238000009434 installation Methods 0.000 claims abstract description 5
- 238000005299 abrasion Methods 0.000 abstract description 7
- 239000002184 metal Substances 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 230000002159 abnormal effect Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004663 powder metallurgy Methods 0.000 description 2
- 241000905957 Channa melasoma Species 0.000 description 1
- 102000010970 Connexin Human genes 0.000 description 1
- 108050001175 Connexin Proteins 0.000 description 1
- 208000035126 Facies Diseases 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/04—Attachment of linings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/04—Attachment of linings
- F16D2069/0425—Attachment methods or devices
- F16D2069/0441—Mechanical interlocking, e.g. roughened lining carrier, mating profiles on friction material and lining carrier
Abstract
The invention discloses a kind of EMU brake linings to include brake lining steel back (1) and the multiple brake lining friction pieces being distributed in brake lining steel back (1)；Gap is equipped between brake lining friction piece, the single brake lining friction piece includes brake lining friction (2), adjusting pad (3) and butterfly clamp spring (4)；The brake lining steel back (1) includes the friction piece mounting hole position of multiple installation brake lining friction pieces, and friction (2) and adjusting pad (3) are installed in each mounting hole position by butterfly clamp spring (4)；Brake disc can effectively be avoided to draw ditch extremely and metal melt occur, adjust brake lining deformation, abrasion are uniform; braking is stablized, and service life is long, and has the characteristics that convenient disassembly during replacement; and it is high using circular brake pad friction intensity, it can effectively inhibit to wear chip off-falling phenomenon in use.
Description
Technical field
The present invention relates to frame for movement technical field more particularly to a kind of EMU locks suitable for extremely frigid zones operation
Piece.
Background technology
Extremely frigid zones environment temperature down to less than -30 DEG C, and fall over a large area severe snow, for 300~350 kilometers of speed per hour and more than
CRH380 systems EMU, brake disc abnormal wear phenomenon is particularly acute.Main reason is that train is in the process of running,
Brake lining and brake disc phase mutual friction, roadbed sand grains or external hard foreign matter are blended in ice and snow, and are wrapped in brake lining and braking
It is not easy to discharge on clamp.Extraneous hard particles foreign matter, which is clipped between brake disc and brake lining rubbing surface, causes brake disc to scratch.Hard
Foreign matter is ground brake disc, generates metal filings or cuts wire, causes metal melt occur.Therefore, severe cold is solved
Brake disc scratches phenomenon extremely under ice and snow weather environment, it is necessary to which pair the brake lining used is matched with it optimizes.
Therefore, it is necessary to cause ice and snow phenomenon not easily to fall off according to gap is small between former each brake pad of brake piece, to high and cold powder
The shape of last metallurgy brake lining friction and distribution are designed, and increase the gap between each brake lining friction, and make Connexin,
Smoothness avoids the occurrence of dead angle, makes the smooth discharge of the field trashes such as ice and snow, abrasive dust.
The content of the invention
The object of the present invention is to provide a kind of EMU brake linings, and brake disc can effectively be avoided to draw ditch extremely and go out cash
Belonging to fusant, adjust brake lining deformation, abrasion are uniform, and braking is stablized, and service life is long, and with the spy of convenient disassembly when replacing
Point, and it is high using circular brake pad friction intensity, it can effectively inhibit to wear chip off-falling phenomenon in use.
The purpose of the present invention is what is be achieved through the following technical solutions：
A kind of EMU brake lining, including brake lining steel back 1 and the multiple brake lining friction pieces being distributed in brake lining steel back 1；Lock
Gap is equipped between piece friction piece, the single brake lining friction piece includes brake lining friction 2, adjusting pad 3 and butterfly clamp spring 4；
The brake lining steel back 1 includes the friction piece mounting hole position of multiple installation brake lining friction pieces, each mounting hole position bag
Include the butterfly clamp spring card slot 23 coaxial with positioning ball-and-socket hole 21 at positive positioning ball-and-socket hole 21 and the back side；
The adjusting pad 3 includes positive adjusting pad ball-and-socket 33 and the adjusting pad coaxial with adjusting pad ball-and-socket 33 at the back side
Spherical surface 31；
2 back side of brake lining friction includes brake lining friction spherical surface 43, and 43 center of brake lining friction spherical surface is equipped with lock
Tight pin 41, locking pin 41 are interior by butterfly in butterfly clamp spring card slot 23 by sequentially passing through the central through hole of adjusting pad 3 and brake lining steel back 1
Shape clamp spring 4 is locked；Brake lining friction spherical surface 43 is engaged with adjusting pad ball-and-socket 33, adjusting pad spherical surface 31 and positioning ball-and-socket hole 21
It is engaged；
2 side of brake lining friction is equipped with spheric surface 44, and 3 side of adjusting pad is equipped with to the anti-of front extension
It revolves every the 34 anti-rotation column 32 with rearwardly extending, anti-rotation column 32 is arranged in the anti-trepanning 22 of through hole of 21 one side of positioning ball-and-socket hole, prevents
Radial facing 44 is rotated with anti-rotation every 34 cooperation limitation brake lining frictions 2.
The brake lining friction 2 includes the identical circular backboard 45 of cross sectional shape and circular friction piece 46；Brake lining friction
Bulbec face 43 is arranged on the back side of circular backboard 45；Circular friction piece 46 is fixed on the front of circular backboard 45.
The circular backboard 45 is equipped with multiple fixed holes 47, and circular friction piece 46 is equipped with fixing lug boss
48, fixing lug boss 48 is embedded in fixed hole 47, and circular backboard 45 is made to be tightly fastened with circular friction piece 46 and is connected.
The butterfly clamp spring 4 is rounded butterfly-like, and one side is openend 61；Match equipped with the groove 42 with locking pin 41
The round clasp 62 of conjunction, 62 exit passageway 63 of round clasp connect the openend 61.
As seen from the above technical solution provided by the invention, a kind of EMU lock provided in an embodiment of the present invention
Piece can effectively avoid brake disc from drawing ditch extremely and metal melt occur, adjust brake lining deformation, and abrasion are uniform, and braking is stablized,
Service life is long, and has the characteristics that convenient disassembly during replacement, and high using circular brake pad friction intensity, can be effective
Inhibit to wear chip off-falling phenomenon in use.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present invention, for this
For the those of ordinary skill in field, without creative efforts, other are can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is the structure diagram one of EMU brake lining provided in an embodiment of the present invention；
Fig. 2 is the structure diagram two of EMU brake lining provided in an embodiment of the present invention；
Fig. 3 is the brake lining steel back structure schematic diagram one of EMU brake lining provided in an embodiment of the present invention；
Fig. 4 is the brake lining steel back structure schematic diagram two of EMU brake lining provided in an embodiment of the present invention；
Fig. 5 is the adjusting pad structure diagram one of EMU brake lining provided in an embodiment of the present invention；
Fig. 6 is the adjusting pad structure diagram two of EMU brake lining provided in an embodiment of the present invention；
Fig. 7 is the brake lining friction structure diagram of EMU brake lining provided in an embodiment of the present invention；
Fig. 8 is the circular back board structure schematic diagram of the brake lining friction of EMU brake lining provided in an embodiment of the present invention；
Fig. 9 is the butterfly clip spring structure schematic diagram of EMU brake lining provided in an embodiment of the present invention.
Specific embodiment
With reference to the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Ground describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.Based on this
The embodiment of invention, the every other implementation that those of ordinary skill in the art are obtained without making creative work
Example, belongs to protection scope of the present invention.
It is another it should be noted that " on ", " under " in description orientation mentioned herein is not specific to the party except specified otherwise
Position is intended merely to description conveniently, its different description of placement direction of the product is also not quite similar.Those of ordinary skill in the art
Intelligible orientation without making creative work, belongs to protection scope of the present invention.
The embodiment of the present invention is described in further detail below in conjunction with attached drawing.
Embodiment one
As shown in Fig. 1 to 2, a kind of EMU brake lining, suitable for 300~350 kilometers of speed per hour and above CRH380 systems
High and cold EMU, brake lining use powder metallurgy brake pad, behind repeat no more.Include brake lining steel back 1 in structure and be distributed in brake lining
Multiple brake lining friction pieces in steel back 1；Brake lining steel back 1 is non-dove-tail form steel back, is that facies digitales dorsales manus carries the installation board-like knot of guide groove
Structure, two sides are respectively metal machining part there are one mounting-positioning holes.Gap is equipped between brake lining friction piece, it is whole to reduce brake lining
Body is because of the deflection of expanded by heating in braking process, and the abrasive dust of brake lining friction is discharged in time when being more convenient for braking.Single institute
The brake lining friction piece stated includes brake lining friction 2, adjusting pad 3 and butterfly clamp spring 4.
As shown in Fig. 3 to 4, the brake lining steel back 1 includes the friction piece mounting hole position of multiple installation brake lining friction pieces, often
A mounting hole position includes the butterfly clamp spring card slot 23 coaxial with positioning ball-and-socket hole 21 at positive positioning ball-and-socket hole 21 and the back side；This
Field technology personnel are appreciated that in structure as shown in figs. 1 and 2 to represent to design friction piece mounting hole position
For 18, but actually the concrete numerical value of friction piece mounting hole position can determine according to demand.
As shown in Fig. 5 to 6, the adjusting pad 3 includes positive adjusting pad ball-and-socket 33 and the back side and adjusting pad ball-and-socket
33 coaxial adjusting pad spherical surfaces 31；As shown in Fig. 7 to 8,2 back side of brake lining friction includes brake lining friction spherical surface 43,
43 center of brake lining friction spherical surface is equipped with locking pin 41,41 length of locking pin be more than adjusting pad 3 and brake lining steel back 1 thickness it
With, and annular groove 42 is additionally provided on extension, locking pin 41 is led to by sequentially passing through adjusting pad 3 and the center of brake lining steel back 1
Hole is locked in butterfly clamp spring card slot 23 by butterfly clamp spring 4；Specifically, the as shown in figure 9,4 rounded butterfly of butterfly clamp spring
Butterfly-shaped, one side is openend 61；Equipped with the 42 matched round clasp 62 of groove with locking pin 41, the outlet of round clasp 62 is logical
Road 63 connects the openend 61.The round clasp 62 of butterfly clamp spring 4 is stuck in annular groove 42, and brake lining friction 2 is locked,
Brake lining friction spherical surface 43 is engaged with adjusting pad ball-and-socket 33 after locking, and adjusting pad spherical surface 31 is contacted with positioning ball-and-socket hole 21 matches somebody with somebody
It closes.
Two mating spherical surfaces in braking process, can realize that automatic adjustment braking is flat by adjusting pad 3 and butterfly card 14
Face realizes that the smooth of maximum area is bonded with brake disc, carries out friction catch.
The locking mode of butterfly clamp spring 4 also enables brake lining friction 2 using 41 position of locking pin as pivot
Small rotation is carried out above the brake lining steel back 1 by adjusting pad 3, the position of the locking pin 41 can guarantee and brake
Cheng Zhong, the torque compared with pivot that unit area friction generates with it is mutual compared with the torque of disc centres
It offsets.
Meanwhile 2 side of brake lining friction is equipped with spheric surface 44,3 side of adjusting pad is equipped with prolongs to front
The anti-rotation stretched is arranged on the anti-trepanning 22 of through hole of 21 one side of positioning ball-and-socket hole every the 34 anti-rotation column 32 with rearwardly extending, anti-rotation column 32
In, spheric surface 44 is rotated with anti-rotation every 34 cooperation limitation brake lining frictions 2.
As shown in Fig. 7 to 8, the brake lining friction 2 includes the identical circular backboard 45 of cross sectional shape and rubs with circular
Body 46；Brake lining friction spherical surface 43 is arranged on the back side of circular backboard 45；Circular friction piece 46 is fixed on the front of circular backboard 45.
The circular backboard 45 is equipped with multiple fixed holes 47, and circular friction piece 46 is equipped with fixing lug boss 48, fixes
Boss 48 is embedded in fixed hole 47, and circular backboard 45 is made to be tightly fastened with circular friction piece 46 and is connected.It ensure that circular backboard
45 will not fall off with circular friction piece 46 in high-speed friction braking process.
In addition, the circular backboard 45 and circular friction piece 46 are the smooth circular structure with spheric surface 44, are protected
It has demonstrate,proved its edge and will not have been crushed in high-speed friction braking process due to edge effect and come off.
In this example, brake lining friction 2 and uniformly belong to distribution straggly, this belongs in the design in this field in common-sense
Hold, brake lining entirety can be reduced in braking process because of the deflection of expanded by heating.The brake lining friction 2 is in brake lining steel back 1
Square proportional, the brake lining friction 2 on guarantor unit's area of unit radius friction area and friction radius in plane
The braking energy born is identical, ensure that the abrasion of brake pad friction 2 on unit area are identical, can effectively improve lock
Piece service life.
Above-mentioned powder metallurgy brake pad provided in this embodiment has wide arc gap, easy chip removal, and abrasion are uniform, and braking is steady, makes
With long lifespan, replace when convenient disassembly the features such as.Friction has stable coefficient of friction and low abrasion, while there is height to lead
Hot, heat-resisting and higher anti-stick property and higher thermophysical property, mechanical performance.Brake noise is small, to brake disc not
Abnormal trench abrasion are generated, the high and cold EMU car braking of CRH380 systems of 300~350km/h and more than speed per hour can be met.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art is in the technical scope of present disclosure, the change or replacement that can readily occur in,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Subject to enclosing.
Claims (4)
1. a kind of EMU brake lining, which is characterized in that multiple in brake lining steel back (1) with being distributed in including brake lining steel back (1)
Brake lining friction piece；Gap is equipped between brake lining friction piece, the single brake lining friction piece includes brake lining friction (2), adjusting pad
(3) with butterfly clamp spring (4)；
The brake lining steel back (1) includes the friction piece mounting hole position of multiple installation brake lining friction pieces, and each mounting hole position includes
Positive positioning ball-and-socket hole (21) and the butterfly clamp spring card slot (23) coaxial with positioning ball-and-socket hole (21) at the back side；
The adjusting pad (3) includes positive adjusting pad ball-and-socket (33) and the adjustment coaxial with adjusting pad ball-and-socket (33) at the back side
Dig face (31)；
Described brake lining friction (2) back side includes brake lining friction spherical surface (43), and brake lining friction spherical surface (43) center is equipped with
Locking pin (41), locking pin (41) is by sequentially passing through the central through hole of adjusting pad (3) and brake lining steel back (1), in butterfly clamp spring card
It is locked in slot (23) by butterfly clamp spring (4)；Brake lining friction spherical surface (43) is engaged with adjusting pad ball-and-socket (33), adjustment dig
Face (31) is engaged with positioning ball-and-socket hole (21)；
Described brake lining friction (2) side is equipped with spheric surface (44), and the adjusting pad (3) side is equipped with to front extension
Anti- rotation is every (34) and the anti-rotation column (32) rearwardly extended, and anti-rotation column (32) is arranged on the anti-rotation of through hole of positioning ball-and-socket hole (21) one side
In hole (22), spheric surface (44) coordinates limitation brake lining friction (2) to rotate with anti-rotation every (34).
2. EMU brake lining according to claim 1, which is characterized in that the brake lining friction (2) includes section
The identical circular backboard (45) of shape and circular friction piece (46)；Brake lining friction spherical surface (43) is arranged on the back of the body of circular backboard (45)
Face；Circular friction piece (46) is fixed on the front of circular backboard (45).
3. EMU brake lining according to claim 2, which is characterized in that the circular backboard (45) is equipped with
Multiple fixed holes (47), circular friction piece (46) are equipped with fixing lug boss (48), and fixing lug boss (48) is embedded in fixed hole
(47) in, circular backboard (45) is made to be tightly fastened with circular friction piece (46) and is connected.
4. according to the EMU brake lining described in claim 1,2 or 3, which is characterized in that the butterfly clamp spring (4) is rounded
Butterfly-like, one side is openend (61)；Equipped with groove (42) matched round clasp (62) with locking pin (41), circular card
Ring (62) exit passageway (63) connects the openend (61).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711394956.4A CN108061117A (en) | 2017-12-21 | 2017-12-21 | A kind of EMU brake lining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711394956.4A CN108061117A (en) | 2017-12-21 | 2017-12-21 | A kind of EMU brake lining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108061117A true CN108061117A (en) | 2018-05-22 |
Family
ID=62139656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711394956.4A Pending CN108061117A (en) | 2017-12-21 | 2017-12-21 | A kind of EMU brake lining |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108061117A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108488279A (en) * | 2018-05-22 | 2018-09-04 | 沈阳精合数控科技开发有限公司 | A kind of non-dove-tail form powder metallurgy brake pad |
| CN110340645A (en) * | 2019-08-02 | 2019-10-18 | 北京浦然轨道交通科技有限公司 | A kind of brake lining resolving device and method |
| CN115415515A (en) * | 2022-09-07 | 2022-12-02 | 北京浦然轨道交通科技股份有限公司 | Friction body and preparation method thereof, friction assembly and powder metallurgy brake pad |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1211500B (en) * | 1961-12-06 | 1966-02-24 | Dba Sa | Brake shoe for partially lined disc brakes with loose brake caliper, especially for motor vehicles |
| CN102748417A (en) * | 2012-04-09 | 2012-10-24 | 北京天宜上佳新材料有限公司 | Floating type train brake lining with replaceable friction blocks |
| WO2014121704A1 (en) * | 2013-02-06 | 2014-08-14 | 北京天宜上佳新材料有限公司 | Floating type brake pad for train |
| CN203847599U (en) * | 2014-03-14 | 2014-09-24 | 天津机辆轨道交通装备有限责任公司 | High-speed train brake pad capable of automatically adjusting applying friction |
| CN106996430A (en) * | 2017-04-27 | 2017-08-01 | 克诺尔车辆设备(苏州)有限公司 | A kind of floating type brake lining |
| CN206377190U (en) * | 2016-12-30 | 2017-08-04 | 北京瑞斯福高新科技股份有限公司 | The kilometer motor vehicle group powder metallurgy brake pad of dovetail steel back integral type speed per hour 160~250 |
| CN206539626U (en) * | 2016-12-26 | 2017-10-03 | 常州中车铁马科技实业有限公司 | A kind of train brake plate |
| CN207814286U (en) * | 2017-12-21 | 2018-09-04 | 北京瑞斯福高新科技股份有限公司 | A kind of EMU brake lining |
-
2017
- 2017-12-21 CN CN201711394956.4A patent/CN108061117A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1211500B (en) * | 1961-12-06 | 1966-02-24 | Dba Sa | Brake shoe for partially lined disc brakes with loose brake caliper, especially for motor vehicles |
| CN102748417A (en) * | 2012-04-09 | 2012-10-24 | 北京天宜上佳新材料有限公司 | Floating type train brake lining with replaceable friction blocks |
| WO2014121704A1 (en) * | 2013-02-06 | 2014-08-14 | 北京天宜上佳新材料有限公司 | Floating type brake pad for train |
| CN203847599U (en) * | 2014-03-14 | 2014-09-24 | 天津机辆轨道交通装备有限责任公司 | High-speed train brake pad capable of automatically adjusting applying friction |
| CN206539626U (en) * | 2016-12-26 | 2017-10-03 | 常州中车铁马科技实业有限公司 | A kind of train brake plate |
| CN206377190U (en) * | 2016-12-30 | 2017-08-04 | 北京瑞斯福高新科技股份有限公司 | The kilometer motor vehicle group powder metallurgy brake pad of dovetail steel back integral type speed per hour 160~250 |
| CN106996430A (en) * | 2017-04-27 | 2017-08-01 | 克诺尔车辆设备(苏州)有限公司 | A kind of floating type brake lining |
| CN207814286U (en) * | 2017-12-21 | 2018-09-04 | 北京瑞斯福高新科技股份有限公司 | A kind of EMU brake lining |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108488279A (en) * | 2018-05-22 | 2018-09-04 | 沈阳精合数控科技开发有限公司 | A kind of non-dove-tail form powder metallurgy brake pad |
| CN110340645A (en) * | 2019-08-02 | 2019-10-18 | 北京浦然轨道交通科技有限公司 | A kind of brake lining resolving device and method |
| CN115415515A (en) * | 2022-09-07 | 2022-12-02 | 北京浦然轨道交通科技股份有限公司 | Friction body and preparation method thereof, friction assembly and powder metallurgy brake pad |
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