Locomotive powder metallurgy brake shoe steel back

Abstract

The utility model discloses a locomotive powder metallurgy brake shoe steel back, including the integral connection of the shoe back body of two outer sections and middle section, the shoe nose that is fixedly connected in the middle section outside of shoe back body through the outside weld joint, and the shoe nose is equipped with shoe nose hole, its characterized in that is fixedly equipped with the locating boss on the outside surface of two outer sections of shoe back body, the inside surface of locating boss is equipped with the recess, and two locating bosses are arranged with the symmetry of shoe nose center line. The utility model can improve the connecting strength of powder metallurgy friction block and shoe back body, thereby ensuring the brake shoe braking effect and the operation safety of brake shoe steel back.

Description

Technical Field

[0001] This utility model relates to a steel backing for a locomotive powder metallurgy brake shoe. Background Technology

[0002] Existing locomotive powder metallurgy brake shoe steel backing, such as Figure 1 , Figure 2 As shown, the system includes a backing body 11 with a middle section and two outer sections integrally connected, and a nose 13 fixed to the outer side of the middle section of the backing body via an outer weld 12. The nose 13 is provided with a nose hole. Subsequently, powder metallurgy friction blocks need to be welded to the inner side of the backing body to form a locomotive powder metallurgy brake shoe for braking the locomotive wheels. During braking, the brake shoe steel backing needs to withstand a larger load. However, the welding connection strength between the powder metallurgy friction block and the backing body 11, and between the backing body 11 and the nose 13 is insufficient, affecting the braking effect of the brake shoe and the operational safety of the brake shoe steel backing. Summary of the Invention

[0003] The purpose of this utility model is to address the aforementioned shortcomings of the existing technology by providing a locomotive powder metallurgy brake shoe backing, which can improve the connection strength between the powder metallurgy friction block and the backing body, thereby ensuring the braking effect of the brake shoe and the operational safety of the brake shoe backing.

[0004] To achieve the above objectives, this utility model provides a steel backing for a locomotive powder metallurgy brake shoe, comprising a backing body integrally connected to a middle section and two outer sections, and a nose plate fixed to the outer side of the middle section of the backing body via an outer weld, the nose plate having a nose plate hole; characterized in that positioning bosses are fixedly provided on the outer surfaces of the two outer sections of the backing body, and grooves are provided on the inner surfaces of the positioning bosses, the two positioning bosses being symmetrically arranged about the center line of the nose plate.

[0005] When the brake shoe back body is welded to the powder metallurgy friction block, the two protrusions of the powder metallurgy friction block are placed in the grooves on the inner side of the two positioning protrusions. This not only improves the positioning accuracy and facilitates the welding of the two, but also improves the connection strength between the powder metallurgy friction block and the brake shoe back body by matching the two protrusions with the two grooves, thereby ensuring the braking effect of the brake shoe and the operational safety of the brake shoe steel back. As a further improvement of this utility model, the inner end of the tile nose is connected to the middle section of the tile back body through two welds, and the inner sides of the two welds do not exceed the inner side of the middle section of the tile back body; this can improve the welding connection strength between the tile back body and the tile nose. As a further improvement of this utility model, the bottom surface of the groove of the positioning boss is located on the outer side of the corresponding inner side of the outer section; this can ensure sufficient depth of the groove to improve the connection strength between the powder metallurgy friction block and the tile back body. In summary, this invention can improve the connection strength between the powder metallurgy friction block and the brake shoe backing, thereby ensuring the braking effect of the brake shoe and the operational safety of the brake shoe steel backing. Attached Figure Description

[0006] Figure 1 This is a front view of the steel backing of powder metallurgy brake shoes for existing locomotives.

[0007] Figure 2 for Figure 1 AA section diagram.

[0008] Figure 3 This is a front view of an embodiment of the present utility model.

[0009] Figure 4 for Figure 3 Top view.

[0010] Figure 5 for Figure 4 BB cross-sectional view.

[0011] Figure 6 for Figure 3 CC section view.

[0012] Figure 7 This is a front view of a powder metallurgy friction block that is used in conjunction with an embodiment of this utility model. Detailed Implementation

[0013] The present invention will now be described in further detail with reference to the accompanying drawings.

[0014] like Figures 3 to 6 As shown, this embodiment of a locomotive powder metallurgy brake shoe steel backing includes a backing body 1 integrally connected to a middle section and two outer sections, and a nose 2 fixed to the outer side of the middle section of the backing body 1 by an outer weld 4. The nose 2 is provided with a nose hole 3. The inner end of the nose 2 is connected to the middle section of the backing body 1 by two welds 5, and the inner side of each of the two welds 5 does not exceed the inner side of the middle section of the backing body 1. Positioning bosses 6 are fixed on the outer side of the two outer sections of the backing body 1 by local heating, pressing and stretching. The inner side of each positioning boss 6 is provided with a groove 7, and the bottom surface of each groove 7 is located on the outer side of the corresponding inner side of the outer section. The two positioning bosses 6 are symmetrically arranged with respect to the center line of the nose.

[0015] When the tile back body 1 and Figure 7 When welding the powder metallurgy friction block 8 shown, the two protrusions 9 of the powder metallurgy friction block 8 are placed in the grooves 7 on the inner side of the two positioning protrusions 6, and the grooves are ensured to have sufficient depth. This not only improves the positioning accuracy and facilitates the welding of the two, but also, with the two protrusions 9 and the two grooves 7 cooperating, plus the two welds 5, it can improve the connection strength between the powder metallurgy friction block 8 and the brake shoe back 1, thereby ensuring the braking effect of the brake shoe and the operational safety of the brake shoe steel back.

Claims

1. A steel backing for a locomotive powder metallurgy brake shoe, comprising a backing body integrally connected to a middle section and two outer sections, and a nose plate fixed to the outer side of the middle section of the backing body via an outer weld, the nose plate having a nose plate opening; characterized in that... Positioning bosses are fixed on the outer surfaces of both outer sections of the tile back body, and grooves are provided on the inner surfaces of the positioning bosses. The two positioning bosses are symmetrically arranged with respect to the center line of the tile nose.

2. The locomotive powder metallurgy brake shoe steel backing as described in claim 1, characterized in that... The inner end of the tile nose is connected to the middle section of the tile back body through two welds, and the inner side of each weld does not exceed the inner side of the middle section of the tile back body.

3. The locomotive powder metallurgy brake shoe steel backing as described in claim 1 or 2, characterized in that... The bottom surface of the groove of the positioning boss is located on the outer side of the inner side of the corresponding outer segment.

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