Powder metallurgy brake pad for urban train

Abstract

The utility model provides a powder metallurgy brake pad for a city train, which comprises a steel backing, a brake pad body and a brake pad body, the steel backing is composed of two supporting parts, and the width of the supporting parts is gradually narrowed from the middle to the two sides; the number of the trilateral friction sets is two, the trilateral friction sets are arranged on the two supporting parts respectively, and each trilateral friction set is formed by arranging a plurality of regular trilateral friction blocks in a honeycomb shape in a manner that every two friction blocks are adjacent to each other; according to the brake pad, the defects that in the prior art, due to the fact that the belleville spring cannot provide enough thrust for the friction particles, the braking effect is weakened, stick-slip motion occurs between the friction particles and a vehicle, and friction noise is generated in the braking process can be overcome.

Description

Technical Field

[0001] The utility model relates to the technical field of brake pads, in particular to a powder metallurgy brake pad for urban trains. Background Art

[0002] With the rapid development of my country's high-speed railways, higher requirements are placed on the safety performance of train operation. Brake pads slow down or stop trains through friction, and are an indispensable key component in the train braking system. In the prior art, vehicles are often accompanied by friction noise during friction braking. In the prior art, brake pads include friction particles in contact with the vehicle, and most of them have a butterfly spring inside. However, the area of ​​the butterfly spring is too small, resulting in the friction particles When the friction brakes with the vehicle, the butterfly spring cannot provide enough thrust for the friction particles, resulting in a weakened braking effect, a stick-slip motion between the friction particles and the vehicle, and friction noise during the braking process. Utility Model Content

[0003] Therefore, the technical problem to be solved by the utility model is to overcome the defects in the prior art that the butterfly spring cannot provide sufficient thrust for the friction particles, resulting in a weakened braking effect, stick-slip movement between the friction particles and the vehicle, and friction noise during the braking process, thereby providing a powder metallurgy brake pad for urban trains with good butterfly spring thrust.

[0004] To this end, the utility model provides a powder metallurgy brake pad for urban trains, comprising: a steel back, composed of two supporting parts, the width of the supporting parts gradually narrows from the middle to both sides; a triangular friction group, having two groups, which are arranged on the two supporting parts, and the triangular friction group is composed of a plurality of regular triangle friction blocks arranged adjacent to each other in a honeycomb shape; a butterfly spring, which is arranged in an annular structure and is inscribed in the friction block.

[0005] Furthermore: the distance from the lower end surface of the butterfly spring to the upper end surface of the friction block gradually decreases from the inner ring to the outer ring.

[0006] Furthermore: a first circular groove for penetrating the friction block is arranged at the center of the friction block, and a second circular groove is arranged at the center of the butterfly spring, and the first circular groove and the second circular groove are arranged coaxially.

[0007] Further: Rivets are arranged in the first circular groove and the second circular groove, and the rivets are used to fix the friction block and the butterfly spring on the support part.

[0008] Furthermore: the support portion is provided with a receiving groove for receiving a butterfly spring, the butterfly spring is located in the receiving groove and the outer ring portion is in conflict with the friction block.

[0009] Furthermore: a back plate is arranged between the friction block and the butterfly spring, the cross-sectional shape of the back plate is consistent with the cross-sectional shape of the friction block, and the outer ring portion of the butterfly spring is in conflict with the back plate.

[0010] The technical solution of the utility model has the following advantages:

[0011] 1. The utility model provides a powder metallurgy brake pad for urban trains, in which two support parts are arranged in an arc-shaped structure, and the friction blocks are arranged along the arc direction of the support parts. The longitudinal area of ​​the support parts can just accommodate two friction blocks, so that the friction blocks as large as possible can be arranged in the limited support parts to the greatest extent, and the butterfly spring is annular in structure and is inscribed in the triangular friction block, which can expand the area of ​​the butterfly spring to the greatest extent. The butterfly spring has the function of free deformation under pressure, thereby balancing the surface pressure on the friction blocks, balancing the surface pressure of each friction particle, and absorbing the braking vibration and noise.

[0012] 2. The utility model provides a powder metallurgy brake pad for urban trains, in which a butterfly spring is arranged in a structure that is high in the middle and low around. When the friction block contacts the vehicle, the friction block will be subjected to the interaction force of the vehicle, thereby pushing the butterfly spring to deform toward one side of the support part, and the butterfly spring itself has an elastic restoring force, so the elastic restoring force of the butterfly spring itself will push the friction block toward the side close to the vehicle, thereby braking the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 Schematic diagram of the overall structure of the brake piece;

[0015] Figure 2 A schematic diagram of the structure of the brake pad with one side support portion removed;

[0016] Figure 3 Schematic diagram of the cross-sectional structure of the brake pad;

[0017] Figure 4 It is another schematic diagram of the cross-sectional structure of the brake piece.

[0018] Description of reference numerals:

[0019] 1. Steel back; 2. Support part; 3. Triangular friction group; 31. Friction block; 4. Butterfly spring; 5. First circular groove; 51. Second circular groove; 6. Rivet; 7. Accommodating groove; 8. Back plate. DETAILED DESCRIPTION

[0020] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present invention, 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0024] Example

[0025] The present embodiment provides a powder metallurgy brake pad for urban trains, comprising: a steel back 1, which is composed of two support parts 2, and the width of the support part 2 becomes narrower from the middle to the two side components; a triangular friction group 3, which has two groups and is arranged on the two support parts 2. The triangular friction group 3 is composed of a plurality of regular triangle friction blocks 31 arranged adjacent to each other in a honeycomb shape; a butterfly spring 4, which is arranged in an annular structure and is inscribed in the friction block 31.

[0026] The above specific improvements are: Figure 1 and Figure 2As shown, compared with the prior art, the two support parts 2 are arranged in an arc-shaped structure, and the friction blocks 31 are arranged along the arc direction of the support parts 2. The longitudinal area of ​​the support parts 2 can just accommodate the two friction blocks 31, so that the friction blocks 31 can be arranged as much as possible in the limited support parts 2, and the butterfly spring 4 is annular in structure and is inscribed in the triangular friction block 31, which can maximize the area of ​​the butterfly spring 4. The butterfly spring 4 has the function of free deformation under pressure, thereby balancing the surface pressure on the friction block 31, and can balance the surface pressure of each friction particle, absorbing the braking vibration force and noise.

[0027] On the basis of the above embodiment: the distance from the lower end surface of the butterfly spring 4 to the upper end surface of the friction block 31 gradually decreases from the inner ring to the outer ring.

[0028] The above specific improvements are: Figure 3 and Figure 4 As shown, the butterfly spring 4 is arranged in a structure that is high in the middle and low around. When the friction block 31 contacts the vehicle, the friction block 31 will be subjected to the interaction force of the vehicle, thereby pushing the butterfly spring 4 to deform toward one side of the support part 2. The butterfly spring 4 itself has an elastic restoring force, so the elastic restoring force of the butterfly spring 4 itself will push the friction block 31 toward the side close to the vehicle, thereby completing the braking of the vehicle.

[0029] On the basis of the above embodiment: a first circular groove 5 for penetrating the friction block 31 is provided at the center of the friction block 31, and a second circular groove 51 is provided at the center of the butterfly spring 4, and the first circular groove 5 and the second circular groove 51 are coaxially arranged.

[0030] On the basis of the above embodiment: rivets 6 are provided in the first circular groove 5 and the second circular groove 51 , and the rivets 6 are used to fix the friction block 31 and the butterfly spring 4 on the support part 2 .

[0031] On the basis of the above embodiment: the support portion 2 is provided with a receiving groove 7 for receiving the butterfly spring 4 , the butterfly spring 4 is located in the receiving groove 7 and the outer portion of the ring contacts the friction block 31 .

[0032] The above specific improvements are: Figure 3 and Figure 4 As shown, in order to ensure that the butterfly spring 4 does not slide between the friction block 31 and the support part 2, during installation, the butterfly spring 4 is placed in the receiving groove 7 of the support part 2, and then the rivet 6 is passed through the first circular groove 5 and the second circular groove 51, and finally the rivet 6 is crimped so that the butterfly spring 4 is coaxially arranged with the friction block 31 to avoid displacement of the butterfly spring 4 during friction braking of the friction block 31.

[0033] On the basis of the above embodiment: a back plate 8 is further arranged between the friction block 31 and the butterfly spring 4 , the cross-sectional shape of the back plate 8 is consistent with the cross-sectional shape of the friction block 31 , and the outer ring portion of the butterfly spring 4 is in conflict with the back plate 8 .

[0034] The above specific improvements are: Figure 4 As shown, a back plate 8 is further arranged between the friction block 31 and the butterfly spring 4. The cross-sectional shape of the back plate 8 is consistent with the cross-sectional shape of the friction block 31. Through the arrangement of the back plate 8, a transition effect can be played. The back plate 8 is arranged in a planar structure. During installation, the butterfly spring 4 is installed in the accommodating cavity, and then the back plate 8 is installed above the butterfly spring 4. Finally, the friction block 31 is fixed on the back plate 8. In order to increase the connection strength between the back plate 8 and the friction block 31, the two can be welded or sintered to form a whole.

[0035] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A powder metallurgy brake pad for urban trains, characterized in that: include: The steel back (1) is composed of two supporting parts (2), and the width of the supporting parts (2) gradually narrows from the middle to the two sides; The triangular friction group (3) has two groups, which are arranged on two supporting parts (2). The triangular friction group (3) is composed of a plurality of regular triangular friction blocks (31) arranged adjacent to each other in a honeycomb shape. The butterfly spring (4) is arranged in an annular structure and is inscribed in the friction block (31).

2. The powder metallurgy brake pad for urban trains according to claim 1, characterized in that: The distance between the lower end surface of the butterfly spring (4) and the upper end surface of the friction block (31) gradually decreases from the inner ring to the outer ring.

3. The powder metallurgy brake pad for urban trains according to claim 2, characterized in that: A first circular groove (5) for penetrating the friction block (31) is arranged at the center of the friction block (31), and a second circular groove (51) is arranged at the center of the butterfly spring (4), and the first circular groove (5) and the second circular groove (51) are arranged coaxially.

4. The powder metallurgy brake pad for urban trains according to claim 3, characterized in that: Rivets (6) are arranged in the first circular groove (5) and the second circular groove (51), and the rivets (6) are used to fix the friction block (31) and the butterfly spring (4) on the support part (2).

5. The powder metallurgy brake pad for urban trains according to claim 4, characterized in that: The support portion (2) is provided with a receiving groove (7) for receiving a butterfly spring (4); the butterfly spring (4) is located in the receiving groove (7) and the outer ring portion thereof abuts against the friction block (31).

6. The powder metallurgy brake pad for urban trains according to claim 5, characterized in that: A back plate (8) is also provided between the friction block (31) and the butterfly spring (4); the cross-sectional shape of the back plate (8) is consistent with the cross-sectional shape of the friction block (31); and the outer ring portion of the butterfly spring (4) is in contact with the back plate (8).

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