Brake pad steel back facilitating rivet fixing

Abstract

The utility model discloses brake pad steel back convenient to rivet fixed belongs to brake pad steel back technical field. Brake pad steel back convenient to rivet fixed, including steel back board, recess is seted up in the inside of steel back board, recess inlays the uniform temperature board, and the edge of steel back board is provided with the boss and riveting gap, and the boss is provided with the locating pin of the penetration boss, and the inlaying of shape memory alloy ring has on the uniform temperature board, and the riveting gap is used for rivet insertion. The utility model discloses brake pad steel back convenient to rivet fixed, and the coplanar design of boss and locating pin provides the uniform installation reference plane for friction block and calliper, ensures the alignment accurate in the assembly process, and the first function mouth of riveting gap can accommodate rivet gun mouth, guarantees riveting angle consistent, and the surface layer of locating pin is equipped with metal layer, and the below is tapered hole, and the rivet can penetrate the metal layer and enter the tapered hole and take place plastic deformation under the pressure effect, and form high -strength connection.

Description

Technical Field

[0001] This utility model relates to the field of brake pad steel backing technology, and more specifically, to brake pad steel backing that is easy to rivet and fix. Background Technology

[0002] Traditional steel backing generates a temperature difference of over 200°C during continuous braking, which can easily cause uncontrolled thermal deformation and lead to uneven wear of the friction blocks. In addition, the riveting process is complicated, and some locating pins need to be pre-drilled, adding two more steps. When the braking temperature exceeds 300°C, the connection strength of ordinary rivets decreases by 40%. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and to provide a brake pad steel back that is easy to rivet and fix, so as to solve the above-mentioned shortcomings.

[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0005] This utility model discloses a brake pad steel backing that facilitates rivet fixing, comprising a steel backing plate, wherein the interior of the steel backing plate has a groove, and a heat spreader plate is embedded in the groove. The heat spreader plate is made of a composite material of graphene and copper to reduce the overall temperature difference of the steel backing plate. The edge of the steel backing plate is provided with a boss and a rivet notch. A positioning pin is provided through the boss. A shape memory alloy ring is embedded in the heat spreader plate. The rivet notch is used for rivet insertion.

[0006] Preferably, the thickness of the boss is lower than the thickness of the steel back plate, and one side of the boss is coplanar with the back of the steel back plate to form an installation reference surface.

[0007] Preferably, the positioning pin has a penetrable metal layer and a tapered hole, and the outer wall of the positioning pin has a spiral groove to assist stress diffusion and improve fatigue life.

[0008] Preferably, the riveting notch is located on the steel back plate near the shape memory alloy ring, and the riveting notch has two levels, namely a first functional port and a second functional port.

[0009] Preferably, the first functional port and the second functional port are distributed in a stepped manner, and the diameter of the first functional port is larger than that of the second functional port. A limiting port is provided at the opening of the second functional port. The limiting port forms a constriction structure at the second functional port to limit the rivet stroke. The second functional port forms a plastic deformation cavity to fix the position of the rivet. The second functional port is located in the shape memory alloy ring.

[0010] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0011] This utility model features a brake pad steel back designed for easy riveting and fixing. The coplanar design of the boss and locating pin provides a unified mounting reference surface for the friction block and caliper, ensuring accurate alignment during assembly. The first functional port of the riveting notch can accommodate the rivet gun nozzle, ensuring consistent riveting angles, reducing manual adjustment time, and improving automated assembly efficiency. The locating pin has a metal layer on its surface and a tapered hole below. Under pressure, the rivet can penetrate the metal layer and enter the tapered hole to undergo plastic deformation, forming a high-strength connection. The limiting port's constriction structure effectively controls the rivet stroke, preventing over-riveting or under-riveting, and ensuring consistent riveting quality. The outer wall of the locating pin has a spiral groove, which guides the uniform diffusion of stress during riveting, avoiding local stress concentration, thereby significantly improving the fatigue resistance and structural durability of the riveted part. The second functional port of the riveting notch is located on the shape memory alloy ring. When the braking temperature rises, the shape memory alloy ring undergoes a phase change contraction, applying an additional radial clamping force to the rivet, effectively compensating for gap changes caused by thermal expansion and maintaining the stability and sealing of the connection. Attached Figure Description

[0012] Figure 1 This is a structural diagram of the brake pad steel backing that is easy to rivet and fix;

[0013] Figure 2 This is a diagram showing the internal structure of the steel back of the brake pad, which is designed for easy riveting and fixing.

[0014] Figure 3 This is a cross-sectional view of the positioning pin of this utility model;

[0015] Figure 4 This is an enlarged view of section A of this utility model.

[0016] In the diagram: 1. Steel back plate; 11. Temperature plate; 12. Shape memory alloy ring; 2. Boss; 3. Positioning pin; 31. Metal layer; 32. Tapered hole; 33. Spiral groove; 4. Riveting notch; 41. First functional port; 42. Second functional port; 421. Limiting port. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0019] Combination Figures 1-4 The present invention relates to a brake pad steel backing for easy riveting and fixing, comprising a steel backing plate 1, wherein the steel backing plate 1 has a groove inside, and a heat spreader plate 11 is embedded in the groove. The heat spreader plate 11 is made of a composite material of graphene and copper to reduce the overall temperature difference of the steel backing plate 1. One side of the steel backing plate 1 is provided with a convex edge, and the other side of the steel backing plate 1 is a concave edge. The convex edge of the steel backing plate 1 is symmetrically provided with bosses 2, and a positioning pin 3 is provided on the bosses 2. A shape memory alloy ring 12 is embedded in the heat spreader plate 11. A riveting notch 4 is provided on the steel backing plate 1 at the position of the shape memory alloy ring 12 for rivet insertion.

[0020] Specifically, the boss 2 is partially embedded in the steel back plate 1, and the thickness of the boss 2 is lower than the thickness of the steel back plate 1. One side of the boss 2 is coplanar with the back of the steel back plate 1, forming an installation reference surface.

[0021] More specifically, both ends of the positioning pin 3 have protruding bosses 2. The positioning pin 3 located on the back of the steel back plate 1 is used for positioning and fixing the caliper during installation. The positioning pin 3 located on the front of the steel back plate 1 is used for positioning and fixing the friction block. The surface of the positioning pin 3 is provided with a metal layer 31. Below the metal layer 31 is a tapered hole 32. During riveting, the rivet automatically penetrates the metal layer 31 to form a through hole. The metal layer 31 and the tapered hole 32 are fixed by the rivet at the same time. The outer wall of the positioning pin 3 is provided with a spiral groove 33 to assist stress diffusion and improve fatigue life.

[0022] It should be noted that the riveting notch 4 is provided with two levels, namely a first functional port 41 and a second functional port 42. The first functional port 41 and the second functional port 42 are distributed in a stepped manner, and the diameter of the first functional port 41 is larger than that of the second functional port 42. Specifically, the first functional port 41 is used to accommodate the rivet nozzle, and a limiting port 421 is provided at the opening of the second functional port 42. The diameter of the limiting port 421 is smaller than that of the second functional port 42. The limiting port 421 forms a constriction structure at the second functional port 42 to limit the rivet stroke. At the same time, the second functional port 42 forms a plastic deformation cavity to fix the position of the rivet. The second functional port 42 is provided on the shape memory alloy ring 12, which can search 10% at high temperature.

[0023] Working process: The friction block is precisely positioned using the locating pin 3. The protruding part on the front of the locating pin 3 is inserted into the pre-drilled hole in the friction block. The back of the steel back plate 1 and the mounting surface of the caliper are accurately positioned by the coplanarly designed boss 2 and the back locating pin 3. During assembly, the rivet gun nozzle is inserted from the first functional port 41 to ensure the accuracy of the riveting angle. Under pressure, the rivet first contacts the metal layer 31 on the surface of the locating pin 3. When the pressure reaches 3.2-3.8kN, the tip of the rivet penetrates the metal layer 31 and enters the tapered hole 32. Under continuous pressure, the rivet... The rivet material undergoes plastic flow within the tapered hole 32, forming a tight fit. The spiral groove 33 guides stress diffusion and prevents local stress concentration. When the rivet head reaches the limiting port 421, the clamping structure ensures accurate termination of the rivet stroke. When the braking temperature rises, the shape memory alloy ring 12 begins to undergo phase transformation and shrinkage. The diameter of the second functional port 42 shrinks by about 10%, generating an additional radial clamping force on the rivet. This clamping force can compensate for the material thermal expansion gap caused by high temperature. The heat spreader 11 quickly conducts local high temperature, making the overall temperature distribution of the steel back plate 1 uniform.

[0024] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A brake pad steel backing that is easy to rivet and fix, comprising a steel backing plate (1), characterized in that: The steel back plate (1) has a groove inside, and a heat exchange plate (11) is embedded in the groove. The edge of the steel back plate (1) is provided with a boss (2) and a riveting notch (4). A positioning pin (3) is provided on the boss (2) and a shape memory alloy ring (12) is embedded in the heat exchange plate (11). The riveting notch (4) is used for rivet insertion.

2. The brake pad steel backing for easy riveting and fixing according to claim 1, characterized in that: The thickness of the boss (2) is lower than the thickness of the steel back plate (1), and one side of the boss (2) is coplanar with the back of the steel back plate (1) to form an installation reference surface.

3. The brake pad steel backing for easy riveting and fixing according to claim 1, characterized in that: The positioning pin (3) is provided with a penetrable metal layer (31) and a tapered hole (32), and the outer wall of the positioning pin (3) has a spiral groove (33).

4. The brake pad steel backing for easy riveting and fixing according to claim 1, characterized in that: The riveting notch (4) is located on the steel back plate (1) near the shape memory alloy ring (12). The riveting notch (4) has two levels, namely the first functional port (41) and the second functional port (42).

5. The brake pad steel backing for easy riveting and fixing according to claim 4, characterized in that: The first functional port (41) and the second functional port (42) are arranged in a stepped manner, and the diameter of the first functional port (41) is larger than that of the second functional port (42). A limiting port (421) is provided at the opening of the second functional port (42), and the second functional port (42) is provided on the shape memory alloy ring (12).

Images