CN111075865A - Adjustable brake pad for train - Google Patents

Adjustable brake pad for train Download PDF

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Publication number
CN111075865A
CN111075865A CN201911383358.6A CN201911383358A CN111075865A CN 111075865 A CN111075865 A CN 111075865A CN 201911383358 A CN201911383358 A CN 201911383358A CN 111075865 A CN111075865 A CN 111075865A
Authority
CN
China
Prior art keywords
brake pad
friction
steel
pad
steel backing
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
Application number
CN201911383358.6A
Other languages
Chinese (zh)
Inventor
郑继刚
赵翔
肖凯
李加庆
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Bei Mo Gao Ke Friction Material Co ltd
Original Assignee
Beijing Bei Mo Gao Ke Friction Material Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Beijing Bei Mo Gao Ke Friction Material Co ltd filed Critical Beijing Bei Mo Gao Ke Friction Material Co ltd
Priority to CN201911383358.6A priority Critical patent/CN111075865A/en
Publication of CN111075865A publication Critical patent/CN111075865A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00Parts or details
    • F16D65/02Braking members; Mounting thereof
    • F16D65/04Bands, shoes or pads; Pivots or supporting members therefor
    • F16D65/092Bands, shoes or pads; Pivots or supporting members therefor for axially-engaging brakes, e.g. disc brakes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D69/00Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • F16D69/04Attachment of linings
    • F16D69/0408Attachment of linings specially adapted for plane linings

Abstract

The invention discloses an adjustable brake pad for a train. Brake lining includes the clutch blocks, the lining steel backing, a fastening piece, the adapter sleeve, circlip, belleville spring, a plurality of through-holes have been seted up on the clutch blocks, a plurality of through-holes use the clutch blocks center evenly to lay as the center, be equipped with a plurality of counter bores corresponding with a plurality of through-holes on the lining steel backing, belleville spring locates between clutch blocks and the lining steel backing, the adapter sleeve is T type structure, in the draw-in groove of circlip inboard embedding adapter sleeve, the circlip outside is supported and is pasted on the lining steel backing, through-hole and the counter bore corresponding with it, the adapter sleeve passes the lining steel backing in proper order, belleville spring, the clutch blocks, the adapter sleeve is established at the fastening piece middle part, the fastening piece both ends fasten with adapter sleeve bottom and lining steel backing respectively. The invention has the function of elastic floating adjustment, improves the planeness of the friction surface and the evenness of abrasion, improves the braking efficiency and prolongs the service life of the brake pad.

Description

Adjustable brake pad for train
Technical Field
The invention relates to the technical field of train braking, in particular to a regulating type brake pad for a train.
Background
With the increasing criss-cross of the highway network, the driving safety of the train is more and more emphasized. When the train needs braking, a braking system is needed to generate braking torque to be transmitted to the brake pads to achieve braking, wherein friction blocks on the brake pads are directly contacted with wheels, kinetic energy is converted into heat energy through friction, and the heat energy is dissipated into air. Brake pads are key components of train braking devices and therefore have high performance requirements, for example: the brake lining friction material is required to have the characteristics of high friction performance, low noise and the like.
Among the prior art, the train braking brake lining is clutch blocks and brake lining steel backing riveted structure, including friction material layer, friction blocks steel backing, brake lining steel backing, is equipped with communicating rivet hole on friction material layer, friction blocks steel backing, the brake lining steel backing, fixes friction material layer, friction blocks steel backing, brake lining steel backing in proper order through the rivet.
For example, the invention patent with chinese patent publication No. CN107420465A discloses an integral dovetail plate type train brake pad, which comprises a back plate and a plurality of friction bodies connected to the back plate by rivets, and is characterized in that: the friction body comprises a friction material part and a friction back plate part, the friction material and the friction back plate are sintered into a whole in a pressurizing mode, wherein a rivet seat is sleeved outside the rivet, is arranged in a rivet hole reserved in the friction body and the back plate in advance and is in interference fit with the friction back plate of the friction body, and the rivet seat can bear certain shearing force in the interference fit during use, so that the service life of the rivet is ensured, and the rivet is prevented from being damaged by the shearing force to cause failure; the train brake pad structure has the advantages of long service life, high reliability and good braking effect in the braking process.
For another example, the invention patent with the chinese patent publication No. CN107061576A discloses a powder metallurgy brake lining for a motor train unit, which includes a steel backing plate, a dovetail block, and a plurality of brake lining friction bodies, wherein the steel backing plate and the dovetail block are an integral molding structure, any brake lining friction body is fixed on the steel backing plate by a large gasket and a rivet, the large gasket is located between the brake lining friction body and the steel backing plate, and a flange matched with the brake lining friction body in shape is arranged on the edge of the brake lining friction body on the steel backing plate. The brake pad adopts a specially designed structure, so that the rigidity and reliability of the steel backing are improved, the processing technology and the riveting technology are simplified, the production cost of the brake pad is reduced, the reliability and the service life of the brake pad are improved, and the brake pad can be widely applied to brake systems of various railway vehicles and high-speed motor train units.
The prior art has at least the following problems:
the friction block in the brake pad and the steel backing of the brake pad are fixed by a riveting structure and do not have a floating function, so that the pressure of the friction block acting on the wheel is unbalanced, the friction area is also uneven, the friction surface of the friction block contacting with the wheel is abraded unevenly, and the service life of the brake pad is shortened.
Aiming at the problems that in the prior art, a friction block of a brake pad is fixed with a steel backing of the brake pad by a riveting structure and does not have a floating function, so that the pressure of the friction block acting on a wheel is unbalanced, the friction area is also uneven, the abrasion of the friction surface of the friction block contacting with the wheel is uneven, and the service life of the brake pad is shortened, an effective solution is not provided at present.
Disclosure of Invention
The invention aims to provide a regulating type brake pad for a train, aiming at the defects of the prior art.
The brake pad includes: the brake pad comprises a friction block, a brake pad steel back, a fastener, a fastening sleeve, an elastic retainer ring and a disc spring;
a plurality of through-holes have been seted up on the clutch block, a plurality of through-holes use the clutch block center to evenly lay as the center, be equipped with on the brake lining steel backing with a plurality of through-holes corresponding a plurality of counter bores, belleville spring locates between clutch block and the brake lining steel backing, the adapter sleeve is T type structure, in the inboard draw-in groove of embedding adapter sleeve of circlip, the circlip outside is supported and is pasted on the brake lining steel backing, through the through-hole with its corresponding counter bore, the adapter sleeve passes the brake lining steel backing in proper order, belleville spring, the clutch block, the adapter sleeve cover is established at the fastener middle part, the fastener both ends fasten with adapter sleeve bottom and brake lining steel backing respectively.
Furthermore, the friction block comprises a friction material layer, a transition layer and a friction block steel back which are sequentially connected, and the friction block steel back is abutted against the disc spring.
Further, the quantity of clutch blocks is 5, and the quantity of the inboard clutch block that sets up of brake lining steel backing is 3, and the quantity of the outside clutch block that sets up of brake lining steel backing is 2.
Further, the end of the friction block is arc-shaped.
Further, the surfaces of the friction block steel back and the brake pad steel back are covered with platinum-aluminum alloy coatings.
Further, a solid lubricating coating is arranged on the outer side surface of the disc spring.
Further, the outer surface of the friction material layer is engraved with wear increasing grooves.
Further, the transition layer is 11-18% of Sn-Cu alloy.
Furthermore, an insulating ceramic layer is arranged on the outer surface of the friction block steel back.
Further, the solid lubricating coating is prepared by mixing resin, a diluent, graphite powder and a curing agent, wherein the mixing mass ratio of the resin, the diluent, the graphite powder and the curing agent is 1: 1.5: 1: 0.005.
compared with the prior art, the brake pad has the following remarkable advantages:
1, the brake pad has the advantages of automatically adjusting the brake clearance, enhancing the friction effect and being convenient to install and maintain by a method of fixedly mounting the rivet, the disc spring, the elastic retainer ring and the rivet sleeve on the brake pad steel backing in sequence, so that the brake efficiency is improved, and the service life of the brake pad is prolonged.
2, through set up the transition layer between clutch block steel backing and friction material layer, promote intermetallic atom/molecular's interdiffusion, further strengthened bonding strength between sintered clutch block steel backing and the friction material layer, improved anti-shear property and shock resistance between the two, the friction material layer can not appear and drop, fall the phenomenon of piece, improved the yields, make the clutch block safe and reliable more in service to be favorable to prolonging the life of brake lining.
And 3, a solid lubricating coating is arranged on the outer side surface of the disc spring, so that the friction coefficient of the disc spring in the matching process with the friction block steel back and the brake pad steel back is reduced.
4, the quantity through the clutch blocks that inboard set up on the brake lining steel backing is 3, and the quantity of the clutch blocks that the outside set up on the brake lining steel backing is 2 for brake disc uniform wear, generate heat at the braking in-process, prolonged life.
5, through being equipped with insulating ceramic layer at the surface of clutch blocks steel backing, the effectual heat that produces when having completely cut off the brake has reduced the influence of heat to train braking system.
And 6, covering platinum-aluminum alloy coatings on the inner side surface of the friction block steel back and the surface of the brake pad steel back to improve the corrosion resistance of the brake pad.
And 7, the end part of the friction block is arc-shaped, so that the specific surface area of the friction block is improved, the contact area is increased while the mechanical impact and the twisting power are reduced, and the stability of the friction block is improved.
Drawings
FIG. 1 is a partial cross-sectional view of a three-dimensional structure of a brake pad according to the present invention;
FIG. 2 is an enlarged schematic view at A in FIG. 1;
fig. 3 is a partial sectional view of a three-dimensional structure of a brake pad steel backing of the brake pad according to the present invention.
Description of reference numerals:
1-friction block, 11-friction material layer, 12-transition layer, 13-friction block steel back, 2-brake pad steel back, 3-fastening sleeve, 4-fastening piece, 5-elastic retainer ring, 6-disc spring, 7-counter bore, 8-through hole and 9-clamping groove.
Detailed Description
The invention is described in further detail below with reference to the drawings and the detailed description.
As shown in fig. 1 and 2, the brake pad includes: the brake pad comprises a friction block 1, a brake pad steel back 2, a fastening sleeve 3, a fastening piece 4, an elastic check ring 5 and disc springs 6, wherein a plurality of through holes 8 are formed in the friction block 1, the through holes 8 are uniformly distributed by taking the center of the friction block 1 as the center, a plurality of counter bores 7 corresponding to the through holes 8 are formed in the brake pad steel back 2, the disc springs 6 are arranged between the friction block 1 and the brake pad steel back 2, the disc springs 6 communicated with each other are arranged between each corresponding through hole 8 and each counter bore 7, specifically, the number of the disc springs 6 arranged between each corresponding through hole 8 and each counter bore 7 comprises 1, 2 or 4, it needs to be explained that the number of the disc springs 6 arranged between each corresponding through hole 8 and each counter bore 7 is the same, the disc springs 6 are used for buffering, vibration damping and energy storage, the fastening sleeve 3 is of a T-shaped structure, the inner side of the elastic check ring 5 is embedded into a clamping groove 9 on the, 5 outsides of circlip are supported and are pasted on brake lining steel backing 2, and is concrete, circlip 5 is used for increasing the pretightning force and the axial motion of fixed adapter sleeve 3, through-hole 8 and the counter bore 7 corresponding with it, and adapter sleeve 3 passes brake lining steel backing 2 in proper order, belleville spring 6, clutch blocks 1, and 3 covers of adapter sleeve are established at 4 middle parts of fastener, and 4 both ends of fastener are fastened with 3 bottoms of adapter sleeve and brake lining steel backing 2 respectively, and is concrete, and fastener 4 includes rivet, bolt.
It should be noted that, when a plurality of disc springs 6 are stacked and combined, the disc springs 6 have large damping due to friction between the disc springs 6, so as to dissipate impact energy, specifically, the disc springs 6 are springs which are tapered in the axial direction and bear load, and store certain potential energy after bearing load deformation, and when braking, the disc springs 6 release part of the potential energy to keep pressure balance between the friction block 1 and the brake pad steel back 2.
Further, as shown in fig. 1, the number of the plurality of through holes 8 is 3, which is used for forming 3 elastic floating point positions on the friction block 1, balancing the pressure of the friction block 1 acting on the wheel, it should be noted that the increase of the number of the through holes 8 can cause the reduction of the structural strength of the friction block 1, the number of the elastic retainer rings 5, the disc springs 6, the fastening sleeves 3 and the fasteners 4 matched with the through holes 8 is correspondingly increased by the arrangement of the 3 through holes 8, the effects of adjusting the brake clearance and enhancing the friction force are good under the condition of ensuring the structural strength of the friction block 1, and here, the through holes 8 are used for the penetration of the fastening sleeves 3 and the fasteners 4, so as to fasten the friction block 1 and the brake pad steel backing 2.
Further, the inner side surface of the friction block steel back 13 and the surface of the brake pad steel back 2 are covered with a platinum-aluminum alloy coating (not shown in the figure), wherein the thickness of the platinum-aluminum alloy coating is 5-50 μm, and further, the thickness of the platinum-aluminum alloy coating is 5, 10, 20, 30, 40, 50 μm, and is used for improving the corrosion resistance of the brake pad.
Further, as shown in fig. 1, the end of the friction block 1 is formed in an arc shape to increase the specific surface area of the friction block 1.
Further, as shown in fig. 3, the brake pad steel back 2 is a half-sector plate-shaped structure, and specifically, the brake pad steel back 2 is provided with a plurality of counter bores 7 corresponding to each through hole 8 of the plurality of through holes 8 on the friction block 1.
Further, as shown in fig. 1 and 2, the friction block 1 includes a friction material layer 11, a transition layer 12 and a friction block steel back 13 which are connected in sequence, wherein the friction material layer 11, the transition layer 12 and the friction block steel back 13 are formed by sintering, and the friction block steel back 13 abuts against the disc spring 6.
Further, as shown in fig. 1, the number of the friction blocks 1 is 5, specifically, the number of the friction blocks 1 arranged on the inner side of the brake pad steel back 2 is 3, and the number of the friction blocks 1 arranged on the outer side of the brake pad steel back 2 is 2, it should be noted that, due to different circumferences of the inner ring and the outer ring of the brake disc (not shown in the figure), the abrasion and the heating of the brake disc are not uniform during braking, and the friction blocks 1 are arranged to balance the lengths of the friction surfaces and the friction forces of the inner ring and the outer ring of the brake disc, so that the brake disc is uniformly abraded and heated during braking, and the service life is prolonged.
Further, the outer side surface of the friction material layer 11 is engraved with an abrasion increasing pattern (not shown in the drawings) for improving the stability of the friction block 1.
Further, the transition layer 12 is 11-18% of Sn-Cu alloy, and is used for promoting inter-diffusion of intermetallic atoms/molecules, further enhancing the bonding strength between the sintered friction block steel back 13 and the friction material layer 11, improving the shear resistance and the impact resistance between the friction block steel back 13 and the friction material layer 11, and reducing the risk of falling off and chipping of the friction material layer 11.
Further, an insulating ceramic layer (not shown in the figure) is arranged on the outer surface of the friction block steel back 13, the insulating ceramic layer is formed by mixing AlO powder with the particle size of 0.5-3 micrometers and the purity of more than 99 percent and TiO and ZrO powder with the particle size of 1-10 micrometers, the AlO powder accounts for 90-95 percent of the total mass, and the mass ratio of TiO to ZrO is 8: and 3, the insulating ceramic layer is used for isolating heat generated during braking, so that the influence on a train braking system is reduced.
Further, a solid lubricating coating (not shown) is provided on the outer side surface of the disc spring 6, and the thickness of the solid lubricating coating is 30 μm, so as to reduce the friction coefficient when the disc spring 6 is matched with the friction block steel back 13 and the brake pad steel back 2.
Further, the solid lubricating coating is prepared by mixing resin, a diluent, graphite powder and a curing agent, wherein the mixing mass ratio of the resin, the diluent, the graphite powder and the curing agent is 1: 1.5: 1: 0.005.
furthermore, the resin is phenolic resin, the diluent is butanone, and the curing agent is m-xylylenediamine.
The above description is only for the preferred embodiment of the present invention and should not be construed as limiting the present invention, and various modifications and changes can be made by those skilled in the art without departing from the spirit and principle of the present invention, and any modifications, equivalents, improvements, etc. should be included in the scope of the claims of the present invention.

Claims (10)

1. A regulating brake pad for a train, comprising: the brake pad comprises a friction block (1), a brake pad steel back (2), a fastening piece (4), a fastening sleeve (3), an elastic retainer ring (5) and a disc spring (6);
the brake pad is characterized in that a plurality of through holes (8) are formed in the friction block (1), the through holes (8) are uniformly distributed by taking the center of the friction block (1) as the center, a plurality of counter bores (7) corresponding to the through holes (8) are formed in the brake pad steel back (2), the disc spring (6) is arranged between the friction block (1) and the brake pad steel back (2), the fastening sleeve (3) is of a T-shaped structure, the inner side of the elastic check ring (5) is embedded into a clamping groove (9) of the fastening sleeve (3), the outer side of the elastic check ring (5) abuts against the brake pad steel back (2), the fastening sleeve (3) sequentially penetrates through the brake pad steel back (2), the disc spring (6) and the friction block (1) and the fastening sleeve (3) is sleeved at the middle part of the fastener (4), and two ends of the fastening piece (4) are respectively fastened with the bottom of the fastening sleeve (3) and the brake pad steel back (2).
2. The adjustable brake pad for the train as claimed in claim 1, wherein the pad (1) comprises a friction material layer (11), a transition layer (12) and a pad steel backing (13) which are connected in sequence, and the pad steel backing (13) abuts against the disc spring (6).
3. The adjustable brake pad for trains according to claim 1, wherein the number of the friction blocks (1) is 5, the number of the friction blocks (1) disposed inside the pad steel backing (2) is 3, and the number of the friction blocks (1) disposed outside the pad steel backing (2) is 2.
4. Adjustable brake pad for trains according to claim 1, characterized in that the end of the pad (1) is arc-shaped.
5. Adjustable brake pad according to claim 1, characterized in that the disc spring (6) is provided with a solid lubricant coating on its outer surface.
6. Adjustable brake pad for trains according to claim 2, characterized in that the surface of said pad steel back (13) and said pad steel back (2) is covered with a platinum aluminium alloy coating.
7. Adjustable brake pad according to claim 2, characterized in that the outer surface of the friction material layer (11) is embossed with wear enhancing embossments.
8. The adjustable brake pad for a train of claim 2, wherein the transition layer (12) is 11-18% Sn-Cu alloy.
9. Adjustable brake pad for trains, according to claim 2, characterized in that the outer surface of said pad steel backing (13) is provided with an insulating ceramic layer.
10. The adjustable brake pad for the train as claimed in claim 5, wherein the solid lubricating coating is prepared by mixing resin, diluent, graphite powder and curing agent, and the mixing mass ratio of the resin, the diluent, the graphite powder and the curing agent is 1: 1.5: 1: 0.005.
CN201911383358.6A 2019-12-27 2019-12-27 Adjustable brake pad for train Pending CN111075865A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911383358.6A CN111075865A (en) 2019-12-27 2019-12-27 Adjustable brake pad for train

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911383358.6A CN111075865A (en) 2019-12-27 2019-12-27 Adjustable brake pad for train

Publications (1)

Publication Number Publication Date
CN111075865A true CN111075865A (en) 2020-04-28

Family

ID=70318955

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911383358.6A Pending CN111075865A (en) 2019-12-27 2019-12-27 Adjustable brake pad for train

Country Status (1)

Country Link
CN (1) CN111075865A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111677791A (en) * 2020-06-18 2020-09-18 沈阳远程摩擦密封材料有限公司 Carbon ceramic material brake pad for 200KMh speed grade power concentrated motor vehicle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111677791A (en) * 2020-06-18 2020-09-18 沈阳远程摩擦密封材料有限公司 Carbon ceramic material brake pad for 200KMh speed grade power concentrated motor vehicle

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