Powder metallurgy brake pad back plate with fluted structure

Abstract

The utility model discloses a powder metallurgy brake pad back plate with a fluted structure, which belongs to the technical field of vehicle brake devices and comprises a steel back, a pin shaft arranged on the back of the steel back and a friction body arranged on the front of the steel back. The steel backing is of a hexagonal plate-shaped structure and is integrally forged and formed with the pin shaft arranged in the center of the back face. A groove for embedding the friction body is formed in the front end face of the steel backing; the groove is hexagonal and is concentric with the steel backing, and six edges of the groove are respectively parallel to the edge of the steel backing. According to the friction block, the flutes can be in full contact with a friction material, the bonding strength of the friction material and the back plate is improved, the production stability of the friction block is improved, and the production cost and the mass loss of the friction block are effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle brake devices, in particular to a powder metallurgy brake pad back plate with a groove structure. Background Art

[0002] The friction block of the powder metallurgy brake pad is formed by cold pressing the friction body and the back plate, and then sintering them in a sintering furnace. It is required that the back plate and the friction body are firmly bonded, have strong shear resistance during friction braking, and do not fall off.

[0003] During the transportation process after cold pressing, the friction body and the back plate need to have a certain bonding strength and avoid misalignment, which will make it difficult to place them during sintering, thus affecting the sintering quality and efficiency of the brake pad. In order to ensure strength, the traditional back plate is slotted, but the shape of the slot is complex, difficult to process, and the processing cost is expensive. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a powder metallurgy brake pad back plate with a groove structure, which has a simple groove form, strong shear resistance and low cost.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A grooved powder metallurgy brake pad back plate comprises a steel back, a pin arranged on the back of the steel back and a friction body arranged on the front of the steel back; the steel back is a hexagonal plate structure, which is forged integrally with the pin arranged at the center of the back; a groove for embedding the friction body is provided on the front end face of the steel back; the groove is hexagonal, concentrically arranged with the steel back, and the six sides are parallel to the edges of the steel back.

[0007] A further improvement of the technical solution of the utility model is that the depth of the groove ranges from 1 to 2 mm.

[0008] A further improvement of the technical solution of the utility model is that the width of the groove ranges from 2 to 6 mm.

[0009] A further improvement of the technical solution of the utility model is that: the groove comprises a hexagonal groove.

[0010] A further improvement of the technical solution of the utility model is that the groove includes a plurality of hexagonal grooves.

[0011] A further improvement of the technical solution of the utility model is that the groove further includes a circular groove which is concentric with the hexagonal groove and arranged on the inner side thereof.

[0012] A further improvement of the technical solution of the utility model is that: the groove also includes a plurality of circular grooves which are arranged concentrically with the hexagonal groove on the inner side thereof.

[0013] Due to the adoption of the above technical solution, the technical progress achieved by the utility model is:

[0014] 1. The back plate of the utility model is forged in one piece, which reduces the difficulty of production and shortens the production cycle. At the same time, a wide groove is set on the back plate for the friction body to be embedded inside, which increases the filling of the friction material in the groove, makes the groove pattern fully contact with the friction material, improves the bonding strength between the friction material and the back plate, improves the production stability of the friction block, and effectively reduces the production cost and quality loss of the friction block.

[0015] 2. When a hexagonal groove is provided on the front end face of the back plate in the utility model for embedding the friction body, the friction material is pressed into the hexagonal groove by cold pressing. Since the groove has the same shape as the back plate and the distance from any edge of the back plate is the same, the inner wall of the hexagonal groove can resist the shear force from any direction of the friction body, which makes the friction material tightly combined with the back plate.

[0016] 3. When the front end surface of the back plate in the utility model is provided with a hexagonal groove and a circular groove for embedding the friction body, the distance between the hexagonal groove and the edge of the back plate is the same, the distance between the internal circular groove and the center hole of the friction material is the same, the groove pattern is evenly distributed, the contact area between the friction material and the back plate is increased, the shear force is more evenly applied during the friction process, there is no weak point, and the safe use of the friction block can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a left sectional view of the back plate of the powder metallurgy brake pad with groove structure in the utility model;

[0018] Figure 2 This is a front view of the back plate of the powder metallurgy brake pad with groove structure in the first embodiment of the utility model;

[0019] Figure 3 This is a front view of the back plate of the powder metallurgy brake pad with groove structure in the second embodiment of the utility model;

[0020] Among them, 1. steel back, 2. pin shaft, 3. friction body, 4. groove. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below with reference to the accompanying drawings and embodiments:

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "front", "back" ... etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 a limitation on the present invention.

[0023] In the description of the present invention, "several" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0024] like Figure 1 As shown, the groove structure powder metallurgy brake pad back plate includes a steel back 1, a pin shaft 2 arranged on the back of the steel back 1 and a friction body 3 arranged on the front of the steel back 1;

[0025] The steel back 1 is a plate-like structure with a thickness of 4 mm, and is integrally forged with a pin 2 arranged at the center of the back; a groove 4 is provided on the front end surface of the steel back 1, and the depth of the groove 4 ranges from 1 to 2 mm, and the width ranges from 2 to 6 mm;

[0026] The friction body 3 is bonded to the steel back 1 by sintering and embedded in the groove 4, thereby enhancing the bonding strength between the friction body 3 and the steel back 1. Meanwhile, the part of the friction body 3 embedded in the groove 4 of the steel back 1 plays a role in resisting the shear force of the friction body 3.

[0027] Embodiment 1

[0028] like Figure 2 As shown, the groove 4 on the front end surface of the steel back 1 for embedding the friction body 3 comprises a hexagonal groove, and the hexagonal groove can be one or a plurality of hexagonal grooves parallel to each other.

[0029] Embodiment 2

[0030] like Figure 3 As shown, the groove 4 on the front end surface of the steel back 1 for embedding the friction body 3 includes a hexagonal groove and a circular groove. The hexagonal groove can be one or multiple parallel to each other, and the circular groove can be one or multiple parallel to each other.

[0031] In summary, the utility model can make the grooves fully contact with the friction material, improve the bonding strength between the friction material and the back plate, improve the production stability of the friction block, and effectively reduce the production cost and quality loss of the friction block.

Claims

1. A grooved powder metallurgy brake pad back plate, characterized in that: The invention comprises a steel back (1), a pin (2) arranged on the back of the steel back (1), and a friction body (3) arranged on the front of the steel back (1); the steel back (1) is a hexagonal plate-like structure, and is integrally forged with the pin (2) arranged at the center of the back; a groove (4) is provided on the front end surface of the steel back (1) for embedding the friction body (3); the groove (4) is hexagonal, and is arranged concentrically with the steel back (1), and the six sides are respectively parallel to the edges of the steel back (1); the depth of the groove (4) ranges from 1 to 2 mm; the width of the groove (4) ranges from 2 to 6 mm; the groove (4) further comprises one or more circular grooves arranged concentrically with the hexagonal groove on its inner side.

2. The groove structure powder metallurgy brake pad back plate according to claim 1, characterized in that: The groove (4) comprises a hexagonal groove.

3. The grooved powder metallurgy brake pad back plate according to claim 1, characterized in that: The groove (4) comprises a plurality of hexagonal grooves.

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