CN109268412B - Low-abrasion brake pad and brake block structure - Google Patents
Low-abrasion brake pad and brake block structure Download PDFInfo
- Publication number
- CN109268412B CN109268412B CN201811135968.XA CN201811135968A CN109268412B CN 109268412 B CN109268412 B CN 109268412B CN 201811135968 A CN201811135968 A CN 201811135968A CN 109268412 B CN109268412 B CN 109268412B
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- China
- Prior art keywords
- brake
- brake block
- dovetail
- riveting
- holes
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Classifications
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- 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
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- 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
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
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- 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
- F16D65/00—Parts or details
- F16D65/78—Features relating to cooling
Abstract
The low-wear brake pad brake block structure comprises a plurality of brake blocks, a back plate, a dovetail plate, dovetail rivets and brake block locking rivets, wherein the brake blocks comprise friction bodies, a framework and a plurality of anti-rotation pins, riveting holes are formed in the center of the framework, anti-rotation pin mounting holes are formed in the periphery of the riveting holes, the anti-rotation pins penetrate through the anti-rotation pin mounting holes and are formed in the framework, the friction bodies are arranged on one side of the framework, the positions, opposite to the riveting holes, of the friction bodies are provided with rivet joint holes, the brake blocks are connected to one side of the back plate in a matched mode through the brake block locking rivets and the riveting holes, and the dovetail plate is connected to one side, far away from the brake blocks, of the back plate through the dovetail rivets; and mounting holes for mounting the brake block and the dovetail plate are formed in the back plate in a matching manner.
Description
Technical Field
The invention relates to the field of rail transit braking, in particular to a low-abrasion brake pad structure.
Background
Brake pads for motor train units are important braking elements in braking devices and braking systems, and the braking performance of the brake pads is mainly determined by the materials and the performances of brake pads and brake discs. In the case of determining the material and performance of brake pads and brake discs, the reliability of the brake pad structure is one of the main factors affecting the braking performance. Because the high-speed train is braked at a high speed, the brake pad bears larger shearing force and higher temperature and pressure, so that high requirements are put forward on the structure of the brake pad, the strength is reliable, and good heat conductivity is ensured, so that the braking performance of the brake pad during high-speed braking is ensured. In the braking process, the brake pad needs to convert huge friction kinetic energy into heat energy, the heat load of the brake block on the brake pad is huge, the brake block friction body on the brake pad is easy to rise sharply due to temperature, the heat cannot be timely dissipated, the brake block friction body is rapidly worn, and the phenomena of cracking, edge and corner falling and friction body falling occur.
The brake block on the brake pad of the motor train unit widely used in China at present adopts a riveting structure, and most of the brake block is a powder metallurgy friction body which is directly heated, pressurized and sintered on a framework, and then the framework is riveted on one surface of a polygonal plate-shaped backboard through rivets. In order to prevent the brake blocks from rotating in the braking process, each brake block is required to be provided with three or more riveting holes, and the three rivets are riveted on the steel back, so that not only is the whole riveting difficult to realize for all rivets on the whole brake pad, but also each brake block is required to be riveted independently, the assembly efficiency is low, the processing cost is high, the whole brake pad is easy to deform after being riveted, and the braking performance is influenced. Simultaneously, because three or more riveting holes are processed on one brake block, the friction area on the friction body of the brake block is reduced, the unit specific pressure of the friction surface of the brake block is large (the braking thrust acted by the unit area) during braking, the friction heat is increased, the friction surface of the brake block is cracked, edges and corners are dropped, and the friction body is dropped, so that the abrasion of the friction body of the brake block is accelerated.
Aiming at the problems, the invention provides a low-wear brake pad brake block structure for rail transit braking at a speed of 200 km/h-300 km/h, which reduces the unit specific pressure of the friction surface of the brake block during braking and achieves the aim of reducing the abrasion of the friction surface of a friction body of the brake block.
Disclosure of Invention
The invention aims at: the low-abrasion brake pad structure is provided, the unit specific pressure of the friction surface of the brake pad is reduced during braking, and the situation that the friction surface of the friction body of the brake pad is abraded fast is achieved.
In order to achieve the above purpose, the following technical scheme is adopted: the low-wear brake pad brake block structure comprises a plurality of brake blocks, a back plate, a dovetail plate, dovetail rivets and brake block locking rivets, wherein the brake blocks comprise friction bodies, a framework and a plurality of anti-rotation pins, riveting holes are formed in the center of the framework, anti-rotation pin mounting holes are formed in the periphery of the riveting holes, the anti-rotation pins penetrate through the anti-rotation pin mounting holes and are formed in the framework, the friction bodies are arranged on one side of the framework, the positions, opposite to the riveting holes, of the friction bodies are provided with rivet joint holes, the brake blocks are connected to one side of the back plate in a matched mode through the brake block locking rivets and the riveting holes, and the dovetail plate is connected to one side, far away from the brake blocks, of the back plate through the dovetail rivets;
and mounting holes for mounting the brake block and the dovetail plate are formed in the back plate in a matching manner.
As a still further proposal of the invention, the friction body is sintered on the framework by adopting powder metallurgy materials at high temperature and high pressure.
As still further scheme of the invention, the skeleton is provided with anti-friction body falling bosses on one side close to the friction body, the number of the anti-friction body falling bosses is 3, and the connecting lines between the anti-friction body falling bosses are in a regular triangle.
As still further aspects of the present invention, the number of the anti-rotation pins on the brake block is at least 3, and the connecting lines between the anti-rotation pins are polygonal.
As still further aspects of the invention, the anti-rotation pin is T-shaped, and the anti-rotation pin mounting hole is a counter bore.
As still further scheme of the invention, a gasket sleeved on the anti-rotation pin is arranged between the brake block and the back plate.
As a still further aspect of the present invention, the number of the brake blocks is at least 5.
As a still further scheme of the invention, the mounting hole comprises a pin hole matched with the brake block, a brake block riveting hole and a dovetail plate riveting hole matched with the dovetail plate, the pin hole is a straight hole, and the brake block riveting hole and the dovetail plate riveting hole are conical holes.
The invention has the beneficial effects that:
the low-wear brake pad structure only needs to process a riveting hole on one brake pad, and the three riveting holes in the prior art are reduced to one riveting hole, so that the friction area of a friction body of the brake pad is increased, and the unit ratio pressure of the friction surface of the brake pad is reduced compared with that of the original structure during braking. Meanwhile, because a larger ventilation and heat dissipation gap is reserved between the brake pad and the back plate, heat on parts in the brake pad is timely discharged, so that the friction heat of friction surfaces of friction bodies is reduced, deformation of the back plate and other parts caused by heat absorption of brake materials can be effectively reduced, and the brake pad and brake pad structure can also avoid the phenomena of cracking and edge and corner falling of the friction bodies of the brake pad caused by overlong temperature rise of the brake distance, so that the service life of the brake pad is prolonged, and the train operation cost is reduced.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention.
Fig. 2 is a schematic view of an assembled perspective structure of the present invention.
FIG. 3 is a schematic view of a brake block according to the present invention.
Fig. 4 is a schematic diagram of a skeleton structure of the present invention.
FIG. 5 is a schematic view of a combination structure of a skeleton and an anti-rotation pin according to the present invention.
Fig. 6 is a schematic structural diagram of a back plate according to the present invention.
FIG. 7 is a schematic view of a back plate and dovetail plate combination of the present invention.
FIG. 8 is a schematic view of the construction of the anti-rotation pin, dovetail rivet and brake block locking rivet of the present invention.
Fig. 9 is a perspective view showing the overall structure of the present invention.
In the figure: 1-friction body, 11-riveting head hole, 2-skeleton, 21-riveting hole, 22-anti-rotation pin mounting hole, 23-friction body drop boss, 3-anti-rotation pin, 4-washer, 5-backplate, 51-pinhole, 52-brake block riveting hole, 53-dovetail plate riveting hole, 6-dovetail plate, 7-dovetail rivet, 8-brake block locking rivet.
Detailed Description
The following description of the embodiments of the present invention will be made more fully hereinafter with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention.
Referring to fig. 1-9, the low-wear brake pad brake block structure comprises a plurality of brake blocks, a back plate 5, a dovetail plate 6, a dovetail rivet 7 and a brake block locking rivet 8, wherein the brake blocks comprise a friction body 1, a framework 2 and a plurality of anti-rotation pins 3, a riveting hole 21 is formed in the center of the framework 2, anti-rotation pin mounting holes 22 are formed in the periphery of the riveting hole 21, the anti-rotation pins 3 penetrate through the anti-rotation pin mounting holes 22 and are formed in the framework 2, the friction body 1 is arranged on one side of the framework 2, a riveting joint hole 11 is formed in the position, opposite to the riveting hole 21, of the friction body 1, the brake blocks are connected to one side of the back plate 5 in a matched mode through the brake block locking rivet 8 and the riveting hole 21, and the dovetail plate 6 is connected to one side, far away from the brake blocks, of the back plate 5 through the dovetail rivet 7;
and mounting holes for mounting the brake block and the dovetail plate 6 are formed in the back plate 5 in a matching manner.
The friction body 1 is sintered on the framework by adopting powder metallurgy materials at high temperature and high pressure. The function or beneficial effect is as follows: the friction body and the framework are reliably matched, and the braking effect is ensured.
The framework 2 is provided with anti-friction body falling bosses 23 on one side of the friction body 1, the number of the anti-friction body falling bosses 23 is 3, and a connecting line between the anti-friction body falling bosses 23 is in a regular triangle shape. The function or beneficial effect is as follows: the friction body is firmly connected to the framework by the anti-falling boss 23, and the regular triangle reasonably releases the stress of the friction body during working, so that local fracture is not easy to occur.
The number of the anti-rotation pins 3 on the brake block is at least 3, connecting lines between the anti-rotation pins 3 are polygonal, the polygonal is regular polygonal, and the center of the regular polygonal coincides with the center of the riveting hole 21. The function or beneficial effect is as follows: the brake block is guaranteed not to rotate during braking, and meanwhile the regular polygon can enable the force to be equally divided, so that local damage is avoided.
The anti-rotation pin 3 is T-shaped, and the anti-rotation pin mounting hole 22 is a countersunk hole. The function or beneficial effect is as follows: the anti-rotation pin 3 is matched with the anti-rotation pin mounting hole 22 to prevent the friction body from being damaged by deformation of the anti-rotation pin 3 due to excessive shearing force.
A gasket 4 sleeved on the anti-rotation pin 3 is arranged between the brake block and the back plate 5. The functions or beneficial effects are as follows: the brake block and the back plate have a certain gap, so that the heat dissipation is convenient.
The number of the brake blocks is at least 5. The functions or beneficial effects are as follows: ensuring the braking effect.
The mounting holes comprise pin holes 51 matched with the brake blocks, brake block riveting holes 52 and dovetail plate riveting holes 53 matched with the dovetail plates, the pin holes 51 are straight holes, and the brake block riveting holes 52 and the dovetail plate riveting holes 53 are conical holes. The functions or beneficial effects are as follows: the riveting device is convenient to install and rivet, and whether the riveting meets the standard is easy to observe.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (6)
1. The utility model provides a low abrasion brake block structure, includes a plurality of brake blocks, backplate (5), dovetail (6), dovetail rivet (7) and brake block locking rivet (8), its characterized in that: the brake block comprises a friction body (1), a framework (2) and a plurality of anti-rotation pins (3), wherein riveting holes (21) are formed in the center of the framework (2), anti-rotation pin mounting holes (22) are formed in the periphery of the riveting holes (21), the anti-rotation pins (3) penetrate through the anti-rotation pin mounting holes (22) and are formed in the framework (2), one side of the framework (2) is arranged on the friction body (1), riveting holes (11) are formed in positions, opposite to the riveting holes (21), of the friction body (1), the brake block is connected to one side of a back plate (5) in a matched mode through brake block locking rivets (8) and the riveting holes (21), and a dovetail plate (6) is connected to one side, far away from the brake block, of the back plate (5) through dovetail rivets (7);
mounting holes for mounting the brake block and the dovetail plate (6) are formed in the back plate (5) in a matching manner;
the friction body (1) is sintered on the framework by adopting powder metallurgy materials at high temperature and high pressure;
the friction body falling-off bosses (23) are arranged on one side of the skeleton (2) close to the friction body (1), the number of the friction body falling-off bosses (23) is 3, and connecting lines between the friction body falling-off bosses (23) are in a regular triangle shape.
2. The low wear brake pad structure of claim 1, wherein: the number of the anti-rotation pins (3) on the brake block is at least 3, and the connecting lines between the anti-rotation pins (3) are polygonal.
3. The low wear brake pad structure of claim 1, wherein: the anti-rotation pin (3) is T-shaped, and the anti-rotation pin mounting hole (22) is a counter bore.
4. The low wear brake pad structure of claim 1, wherein: a gasket (4) sleeved on the anti-rotation pin (3) is arranged between the brake block and the back plate (5).
5. The low wear brake pad structure of claim 1, wherein: the number of the brake blocks is at least 5.
6. The low wear brake pad structure of claim 1, wherein: the mounting hole comprises a pin hole (51) matched with the brake block, a brake block riveting hole (52) and a dovetail plate riveting hole (53) matched with the dovetail plate, the pin hole (51) is a straight hole, and the brake block riveting hole (52) and the dovetail plate riveting hole (53) are conical holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811135968.XA CN109268412B (en) | 2018-09-28 | 2018-09-28 | Low-abrasion brake pad and brake block structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811135968.XA CN109268412B (en) | 2018-09-28 | 2018-09-28 | Low-abrasion brake pad and brake block structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109268412A CN109268412A (en) | 2019-01-25 |
| CN109268412B true CN109268412B (en) | 2023-10-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811135968.XA Active CN109268412B (en) | 2018-09-28 | 2018-09-28 | Low-abrasion brake pad and brake block structure |
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| Country | Link |
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| CN (1) | CN109268412B (en) |
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| CN205806293U (en) * | 2016-06-30 | 2016-12-14 | 北京北摩高科摩擦材料有限责任公司 | A kind of train elastic adjusting type brake pad |
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2018
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| CN202597552U (en) * | 2012-05-07 | 2012-12-12 | 北京天宜上佳新材料有限公司 | Floating type brake pad for high-speed train |
| CN102996688A (en) * | 2012-12-14 | 2013-03-27 | 贵州新安航空机械有限责任公司 | Novel high-speed brake block |
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| CN109268412A (en) | 2019-01-25 |
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