Brake pad and brake device

Abstract

The utility model discloses a brake pad and a brake device, relates to the technical field of brake systems, and aims to solve the problem that a friction body is not easy to replace after the brake pad is abraded to a limit. The brake pad comprises a swallow-tailed steel back, the swallow-tailed steel back comprises a swallow-tailed block portion and a steel back portion which are integrally formed, the swallow-tailed block portion is located on one face of the steel back portion, and a connecting hole is formed in the swallow-tailed The connecting sheet is provided with a fastener for penetrating through the connecting hole and is arranged on the other surface of the steel back part; the clamp spring is clamped and matched with one end of the fastener so as to fix the connecting sheet and the swallow-tail-shaped steel back; the surface of the friction body is flat, the steel back, the connecting piece and the friction body are the same in edge contour shape, and the friction body is fixedly connected with the face, away from the steel back, of the connecting piece. The friction body with the flat surface is in contact with the brake disc for braking, the friction body is detachably connected with the swallow-tail-shaped steel back through the connecting piece, metal chippings attached and accumulated to the surface of the friction body are reduced, the risk that the brake disc is scratched by the brake pad is reduced, and the friction body can be conveniently detached and replaced after abrasion reaches the limit.

Description

Technical Field

[0001] The utility model relates to the technical field of brake systems, in particular to a brake pad and a brake device. Background Art

[0002] The existing powder metallurgy brake pads for Russia's high-altitude trains with a speed of 200 kilometers per hour are of split structure for the dovetail and steel back, which are riveted and welded together by welding technology. The friction component and the steel back are also welded together, and the process is complicated. During the contact and braking process between the friction component and the brake disc, the metal cuttings continue to grind the surface of the brake disc and cause metal to accumulate on the surface of the brake pad, causing abnormal scratches on the friction surface of the brake pad and brake disc. After the wear limit is reached, the friction component cannot be disassembled and can only be scrapped at one time, which makes it inconvenient to disassemble and replace the friction component. Utility Model Content

[0003] The utility model aims to provide a brake pad and a brake device, which are used to reduce the scratches caused by the brake pad on the brake disc and facilitate the disassembly and replacement of the friction body after the wear reaches a limit.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] In a first aspect, the utility model provides a brake pad, comprising:

[0006] The dovetail steel back comprises an integrally formed dovetail block and a steel back, wherein the dovetail block is located on one side of the steel back and a connection hole is provided on the dovetail steel back;

[0007] A connecting piece, provided with a fastener for passing through the connecting hole, the connecting piece being arranged on the other side of the steel back;

[0008] A retaining ring is engaged with one end of the fastener passing through the connecting hole to fix the connecting piece and the dovetail steel back;

[0009] The friction body has a flat surface, and the edge contour shapes of the steel back, the edge contour shapes of the connecting piece and the friction body are the same. The friction body is fixedly connected to a side of the connecting piece away from the steel back.

[0010] Optionally, in the above-mentioned brake piece, at least two mounting grooves are provided on the dovetail block portion, and two adjacent mounting grooves are arranged at intervals, and the mounting grooves are used to limit the retaining spring.

[0011] Optionally, in the above-mentioned gate piece, the inner wall contour shape of the installation groove includes a circle or a polygon.

[0012] Optionally, in the above brake piece, the retaining spring includes an E-shaped retaining spring or a V-shaped retaining spring.

[0013] Optionally, in the above brake pad, the friction body is made of powder metallurgy material, and the friction body and the connecting plate are fixed by pressure sintering.

[0014] Optionally, in the above-mentioned gate piece, the fastener is a positioning locking pin.

[0015] Optionally, in the above-mentioned gate piece, the thickness of the steel back is 4 to 6 mm; the thickness of the connecting piece is 2 to 4 mm.

[0016] In the second aspect, the utility model also provides a braking device, including a brake pad, a brake disc and a caliper, the caliper is respectively arranged on both sides of the brake disc, a brake pad is provided on the end of the caliper facing the brake disc, the caliper is used to drive the friction body of the brake pad toward the brake disc and contact the brake, and the brake pad is any one of the above-mentioned brake pads.

[0017] Optionally, in the above-mentioned braking device, two brake pads are provided at one end of the clamp facing the brake disc, and the two brake pads are symmetrically arranged, and the straight surfaces of the two brake pads are arranged adjacent to each other.

[0018] Compared with the prior art, when the above technical solution is adopted, after one side of the connecting plate is fixedly connected to a friction body with a smooth surface, the fastener on the connecting plate passes through the dovetail steel back and the two are detachably fixedly connected by a retaining spring, and the brake pad is braked by contacting the friction body with the surface of the brake disc. Compared with the traditional arrangement of multiple friction blocks on a steel back, the friction assembly and the steel back are connected by welding. The present application only realizes detachable installation between a friction body with a smooth surface and the dovetail steel back through the matching connection of the retaining spring and the fastener on the connecting plate. After the installation is completed, contact braking with the brake disc can be achieved, which facilitates the disassembly and replacement of the friction body after the wear limit is reached. There is no contact gap on the surface of the friction body, and metal debris or sand is not easy to accumulate on the surface of the friction body, reducing the risk of scratches on the brake disc by the brake pad. In addition, the dovetail steel back is an integrated structure, which eliminates the complicated welding process compared to the existing dovetail block and steel back that are welded separately, and avoids deformation of the dovetail block during welding. In addition, the friction body and the connecting plate can be pressurized, sintered, welded and fixed, and then mechanically connected to the dovetail steel back through fasteners, avoiding direct welding of the dovetail steel back to the friction body, which would cause deformation of the dovetail block and ensure more accurate positioning of the dovetail block interface. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0020] Figure 1 A schematic diagram of the overall structure of a brake piece provided by the utility model;

[0021] Figure 2A disassembly schematic diagram of a brake piece provided by the utility model;

[0022] Figure 3 A top view of a dovetail steel back of a brake pad provided by the utility model;

[0023] Figure 4 for Figure 3 Sectional view along AA direction;

[0024] Figure 5 A top view of a connecting piece of a brake piece provided by the utility model;

[0025] Figure 6 for Figure 5 Cross-sectional view along the BB direction;

[0026] Figure 7 A schematic diagram of the connection structure between a connecting piece and a friction body in a brake piece provided by the utility model;

[0027] Figure 8 A schematic diagram of the structure of a retaining spring in a brake piece provided by the utility model;

[0028] Fig. 9 The utility model is a schematic diagram of the structure of a fastener in a brake piece.

[0029] Reference numerals:

[0030] 1- dovetail steel back; 11- dovetail block; 12- steel back; 13- connection hole; 2- connection piece; 3- retaining spring; 4- friction body; 5- installation groove; 6- fastener. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0032] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The meaning of "several" is one or more, unless otherwise clearly and specifically defined.

[0034] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0035] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0036] like Figure 1-Figure 9 As shown, a brake pad provided by an embodiment of the utility model includes: a dovetail steel back 1, a connecting piece 2, a retaining spring 3 and a friction body 4.

[0037] Among them, the dovetail steel back 1 includes an integrally formed dovetail block 11 and a steel back 12, the dovetail block 11 is located on one side of the steel back 12, and the dovetail steel back 1 is provided with a connecting hole 13; the connecting piece 2 is provided with a fastener 6 for passing through the connecting hole 13, and the connecting piece 2 is arranged on the other side of the steel back 12; the retaining spring 3 is snap-fitted with one end of the fastener 6 passing through the connecting hole 13 to fix the connecting piece 2 and the dovetail steel back 1; the surface of the friction body 4 is flat, and the edge contour shape of the steel back 12, the edge contour shape of the connecting piece 2 and the edge contour shape of the friction body 4 are the same, and the friction body 4 is fixedly connected to the side of the connecting piece 2 away from the steel back 12.

[0038] When implementing it, Figure 1As shown, after one side of the connecting plate 2 is fixedly connected to a friction body 4 with a smooth surface, the fastener 6 on the connecting plate 2 passes through the dovetail steel back 1 and the two are detachably fixedly connected by the retaining spring 3. The brake pad contacts and brakes with the surface of the brake disc through the friction body 4. Compared with the traditional arrangement of multiple friction blocks on a steel back, the friction assembly and the steel back are connected by welding. The present application only realizes detachable installation between a friction body 4 with a smooth surface and the dovetail steel back 1 through the matching connection of the retaining spring 3 and the fastener 6 on the connecting plate 2. After the installation is completed, contact braking with the brake disc can be achieved, which facilitates the disassembly and replacement of the friction body 4 after the wear is limited. There is no contact gap on the surface of the friction body 4, and metal debris or sand is not easy to accumulate on the surface of the friction body 4, reducing the risk of scratches on the brake disc by the brake pad. In addition, the dovetail steel back 1 is an integrally formed structure, which eliminates the complicated welding process compared to the existing dovetail block and steel back that are welded separately, and avoids deformation of the dovetail block during welding. In addition, the friction body 4 and the connecting plate 2 can be first pressurized, sintered, welded and fixed, and then mechanically connected to the dovetail steel back 1 through the fastener 6, avoiding the direct welding of the dovetail steel back 1 to the friction body 4, which causes deformation of the dovetail block and ensures that the dovetail block interface is more accurately positioned.

[0039] like Figure 1-Figure 4 As shown, specifically, in this embodiment, at least two mounting grooves 5 are provided on the dovetail block portion 11, and two adjacent mounting grooves 5 are arranged at intervals, and the mounting grooves 5 are used to limit the position of the retaining ring 3. Among them, the mounting grooves 5 can be provided with 2, 3, 6, etc., and the number of the mounting grooves 5 is not specifically limited here, as long as the number of the mounting grooves 5 is set to meet the installation and fixing requirements.

[0040] Specifically, in this embodiment, the inner wall profile of the mounting groove 5 includes a circular or polygonal shape. Exemplarily, the inner wall profile of the mounting groove 5 can be circular, triangular or other shapes, and the inner wall profile of the mounting groove 5 is not specifically limited here, as long as the structure of the mounting groove 5 meets the installation and fixing requirements of the retaining ring 3.

[0041] like Figure 1 , Figure 2 and Figure 8As shown, specifically, in this embodiment, the clamp spring 3 includes an E-type clamp spring or a V-type clamp spring. During installation, the operator engages the inner ring edge of the E-type clamp spring with the fastener 6, or engages the inner ring edge of the V-type clamp spring with the fastener 6 to complete the fixed connection between the connecting piece 2 and the dovetail steel back 1. Among them, the inner ring edge of the E-type clamp spring and the C-type clamp spring 3 have the same structure, only the shape of the outer ring edge is different, and the different outer edge shapes are used to adapt to the different shapes of the installation groove 5, that is, when the inner wall contour shape of the installation groove 5 is circular, the clamp spring 3 can be an E-type clamp spring; when the inner wall contour shape of the installation groove 5 is triangular, the clamp spring 3 can be a V-type clamp spring. The structure of the clamp spring 3 is not specifically limited here, as long as the clamp spring 3 meets the requirements of engaging and fixing with the fastener 6.

[0042] Specifically, in this embodiment, the friction body 4 is made of powder metallurgy material, and the friction body 4 and the connecting piece 2 are fixed by pressure sintering. The friction body 4 and the connecting piece 2 made of powder metallurgy material are sintered under pressure, and the high-temperature powder metallurgy material of the friction body 4 and the connecting piece 2 are bonded together during sintering, which reduces the installation process between the friction body 4 and the connecting piece 2, avoids the friction body 4 from being worn and abnormally worn during braking due to inclusions such as ice, snow, sand, etc. retained in the gap between the multiple friction bodies 4, prolongs the service life of the brake pad, and facilitates the processing and manufacturing of the brake pad.

[0043] like Figure 1 Figure 2 and Fig. 9 As shown, specifically, in this embodiment, the fastener 6 is a positioning locking pin. The positioning locking pins can be provided with 2, 3, 6, etc., and the number of the positioning locking pins is not specifically limited, as long as the positioning locking pin passes through the connection hole 13 provided in the dovetail steel back 1 and meets the clamping fit with the clamping spring 3.

[0044] Specifically, in this embodiment, the thickness of the steel back 12 is 4 to 6 mm. Exemplarily, the thickness of the steel back 12 can be 4 mm, 5 mm, 6 mm, etc. The thickness of the steel back 12 is not specifically limited here, as long as the thickness of the steel back 12 meets the supporting strength.

[0045] Specifically, in this embodiment, the thickness of the connecting sheet 2 is 2-4 mm. Exemplarily, the thickness of the connecting sheet 2 can be 2 mm, 3 mm, 4 mm, etc. The thickness of the connecting sheet 2 is not specifically limited here, as long as the thickness of the connecting sheet 2 meets the supporting strength.

[0046] At the same time, the utility model also provides a braking device, including a brake pad, a brake disc and a caliper, the caliper is arranged on both sides of the brake disc, a brake pad is provided on the end of the caliper facing the brake disc, the caliper is used to drive the friction body 4 of the brake pad toward the brake disc and contact the brake, and the brake pad is any one of the above-mentioned brake pads.

[0047] During operation, the brake disc is coaxially arranged with the track wheel. When braking is required, the clamp applies clamping force to the brake disc from both sides of the brake disc. During this process, the clamp drives the friction body 4 of the brake pad toward the brake disc and gradually contacts it. The friction force generated between the friction body 4 and the surface of the brake disc reduces the rotation speed of the brake disc and completes the braking. Since the brake disc and the track wheel operate synchronously, the track wheel stops rotating while the braking of the brake disc is completed. When the wear reaches the limit, the operator only needs to remove the retaining spring 3, remove the worn friction body 4 and connecting plate 2, replace them with the connecting plate 2 with a new friction body 4, and clamp the retaining spring 3 with the fastener 6 on the connecting plate 2 again. After the installation is completed, continue the above-mentioned braking work. Compared with the traditional arrangement of multiple friction blocks on a steel back, the friction assembly and the steel back are connected by welding. The matching connection between the retaining spring 3 and the fastener 6 on the connecting plate 2 in the above-mentioned braking device enables a friction body 4 with a smooth surface to be detachably installed with the dovetail-shaped steel back 1. After the installation is completed, contact braking with the brake disc can be achieved, and there is no contact gap on the surface of the friction body 4, which reduces the adhesion and accumulation of hard foreign matter such as metal debris or sand on the friction body 4 during braking, reduces the risk of scratches on the brake disc by the brake pad, and facilitates the disassembly and replacement of the friction body 4 after the wear reaches the limit.

[0048] Specifically, in this embodiment, two brake pads are disposed on one end of the clamp facing the brake disc, and the two brake pads are symmetrically arranged, and the straight surfaces of the two brake pads are adjacent to each other.

[0049] During operation, two brake pads are used to perform contact braking on one side of the brake disc, and two brake pads are also provided on the other side of the brake disc for contact braking, which increases the contact area between the friction body 4 of the brake pad and the brake disc, increases the friction force, and improves the braking effect.

[0050] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0051] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A brake pad, characterized in that: include: A dovetail steel back, the dovetail steel back comprising an integrally formed dovetail block portion and a steel back portion, the dovetail block portion being located on one surface of the steel back portion, and the dovetail steel back having a connecting hole; A connecting piece, provided with a fastener for passing through the connecting hole, the connecting piece being arranged on the other side of the steel back; A retaining spring, engaged with one end of the fastener passing through the connecting hole, so as to fix the connecting piece and the dovetail steel back; The friction body has a flat surface, and the edge contour shapes of the steel back, the edge contour shapes of the connecting piece and the edge contour shapes of the friction body are the same. The friction body is fixedly connected to a side of the connecting piece away from the steel back.

2. The brake pad according to claim 1, characterized in that: At least two mounting grooves are arranged on the dovetail block portion, and two adjacent mounting grooves are arranged at intervals. The mounting grooves are used to limit the retaining spring.

3. The brake pad according to claim 2, characterized in that: The inner wall profile of the mounting groove includes a circular shape or a polygonal shape.

4. The brake pad according to claim 1, characterized in that: The clamping spring includes an E-shaped clamping spring or a V-shaped clamping spring.

5. The brake pad according to claim 1, characterized in that: The friction body is made of powder metallurgy material, and the friction body and the connecting sheet are fixed by pressure sintering.

6. The brake pad according to claim 1, characterized in that: The fastener is a positioning locking pin.

7. The brake pad according to claim 1, characterized in that: The thickness of the steel back is 4-6 mm; the thickness of the connecting piece is 2-4 mm.

8. A braking device, characterized in that: It includes a brake pad, a brake disc and a caliper, wherein the caliper is respectively arranged on two sides of the brake disc, the brake pad is provided on one end of the caliper facing the brake disc, the caliper is used to drive the friction body of the brake pad toward the brake disc and contact the brake, and the brake pad is the brake pad as described in any one of claims 1-7.

9. The braking device according to claim 8, characterized in that: Two brake pads are arranged at one end of the clamp facing the brake disc, and the two brake pads are symmetrically arranged, and the straight surfaces of the two brake pads are arranged adjacent to each other.

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