CN107606009A - One kind brake backboard - Google Patents

Abstract

One kind brake backboard, it includes backboard, boss, groove；Boss and backboard integrative-structure, are cast, groove is located at boss side surfaces using spheroidal graphite cast-iron.Boss circular arc line of active force resultant direction suffered by is evenly arranged, concentric arc trajectory arrangement of the groove of boss side surfaces along circular arc line, powder metallurgy frictional layer forms active force under frictional force effect to boss during brake, each boss can equably share active force, make backboard uniform force, the groove design of boss side surfaces ensure that powder metallurgy frictional layer can be fully combined together after sintering curing with backboard, it is therefore prevented that the situation that frictional layer peels off during stress occurs.

Description

A brake back plate

technical field

The invention relates to a vehicle tool, in particular to a brake back plate.

Background technique

The brake back plate is an important part of the car brake, and it is the base layer for the adhesion of the powder metallurgy friction layer. One type of the current brake back plate is to weld barbed wire on the low carbon steel back plate to enhance the adhesion effect of the powder metallurgy friction layer. For ductile iron castings, there are bosses arranged in a certain area on it. The purpose is to enhance the adhesion of the powder metallurgy friction layer on the brake back plate. The frictional force can be evenly distributed to the back plate. At the same time, due to the different thermal expansion and contraction properties of the back plate and the powder metallurgy friction layer, and due to the layout of the bosses, the grooves cannot be processed on the side, and the friction layer may peel off. , the attachment is not strong enough.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art and provide a brake back plate.

The present invention is achieved through the following technical solutions:

A brake back plate, which includes a back plate, a boss, and a groove; the boss and the back plate have an integral structure, cast with ductile iron, and the groove is located on the side of the boss;

It is characterized in that the above-mentioned brake back plate, the powder metallurgy friction layer forms an action force on the boss under the action of friction during braking, the boss is evenly arranged along the arc line formed by the resultant direction of the force, and the groove on the side of the boss Arranged along the concentric arc track line of the arc line, the groove is milled and formed along the concentric arc track line with a forming milling cutter after casting.

The beneficial effects of the present invention are: when braking, the powder metallurgy friction layer forms an action force on the boss under the action of friction, and the bosses are evenly arranged along the arc line formed by the resultant force direction of the action force, and each boss can evenly share the action The force ensures that the back plate is evenly stressed, and the groove design on the side of the boss ensures that the powder metallurgy friction layer can be fully combined with the back plate after sintering and solidification, preventing the friction layer from peeling off when the force is applied.

Description of drawings

Fig. 1 is a schematic diagram of the present invention;

Fig. 2 is a schematic diagram of the attached powder metallurgy friction layer of the present invention;

Fig. 3 is a schematic diagram of the stress on the boss and the groove milling path of the present invention;

Fig. 4 is a schematic diagram of the stress on a single boss in the present invention.

In the figure, back plate 1, boss 2, groove 3, powder metallurgy friction layer 4

detailed description

As shown in Figures 1, 2, 3, and 4, a brake back plate includes a back plate 1, a boss 2, and a groove 3; table side;

It is characterized in that the above-mentioned brake back plate, when braking, the powder metallurgy friction layer 4 forms an acting force f on the boss 2 under the action of friction, and the boss 2 is evenly arranged along the arc line formed by the resultant force F of the acting force, and the convex The groove 3 on the side of the platform 2 is arranged along the concentric arc trajectory line X of the arc line, and the groove 3 is milled along the concentric arc trajectory line X with a forming milling cutter after casting.

The working process of the present invention is: when the powder metallurgy friction layer 4 is stressed, an action force f will be formed on the boss 2. Since the arc line formed by the boss 2 along the direction of the resultant force F of the action force f is evenly arranged, the same arc Each boss 2 on the line can share the force evenly, and the resultant force is F. This layout makes the force on the entire backplane 1 uniform. At the same time, because the grooves 3 on the side of the boss 2 are arranged along the concentric arc trajectory , which is convenient for milling and forming, and at the same time ensures that the powder metallurgy friction layer 4 can be completely combined with the back plate 1 after sintering, and will not peel off when stressed.

Claims (2)

1. A brake back plate, characterized in that: it includes a back plate, a boss, and a groove; the boss and the back plate have an integrated structure, cast with nodular cast iron, and the groove is located on the side of the boss. 2. A brake back plate as claimed in claim 1, characterized in that: for the brake back plate, the powder metallurgy friction layer forms a force on the boss under the action of friction during braking, and the boss along the force The circular arc lines formed by the direction of the resultant force are evenly arranged, and the grooves on the side of the boss are arranged along the concentric arc trajectory of the circular arc line. After casting, the groove is milled and formed along the concentric arc trajectory with a forming milling cutter.