A single-axle pin type brake base plate

Abstract

A single-axle pin type brake base plate, comprising a brake base plate body, a camshaft mounting seat installed on the brake base plate body, a camshaft mounting hole arranged at the center of the camshaft mounting seat, a flange plate installed on the camshaft mounting seat, a center hole arranged at the center of the brake base plate body, characterized in that: an axle pin mounting seat is arranged at the lower side of the brake base plate body, an axle pin mounting hole is arranged at the center of the axle pin mounting seat, and the axis position error of the three holes of the axle pin mounting hole, the camshaft mounting hole and the center hole does not exceed 0.1mm. The utility model has simple structure, high strength, light weight and convenient installation.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile drum brakes, in particular to a single-axle pin type brake bottom plate. Background Art

[0002] The brake base plate is a key part in the brake assembly. It is a supporting part that fixes the brake shoe assembly and is assembled with the brake drum in the automobile brake. It is the core of the vehicle brake. The existing brake base plates have the following problems: First, the brake base plate is not strong enough and is easy to deform, resulting in brake failure; second, the existing brake base plates are mostly double-axle pin brake base plates, and the double-axle pin mounting seat is often large in size and heavy in weight, which not only increases the weight of the entire brake, but also wastes materials. At the same time, the double-axle pin mounting seat has a complex structure, resulting in complex processing procedures and inconvenient installation; third, the camshaft mounting hole, the brake base plate center hole, and the axle pin mounting hole of the double-axle pin brake base plate are not on the same straight line. The position of the return spring installed on the brake shoe is easy to deviate from the center line, causing the friction lining on the brake shoe to be unevenly stressed, resulting in unstable braking and reduced driving comfort. Summary of the invention

[0003] The utility model aims to overcome the defects and shortcomings of the prior art and provide a single-axle pin type brake base plate which has a simple structure, high strength, light weight and convenient installation.

[0004] To achieve the above purpose, the technical solution of the utility model is: a single-axis pin type brake base plate, including a brake base plate body, a camshaft mounting seat is installed on the brake base plate body, a camshaft mounting hole is arranged at the center of the camshaft mounting seat, a flange is installed on the camshaft mounting seat, and a center hole is arranged at the center of the brake base plate body, characterized in that: an axis pin mounting seat is arranged on the lower side of the brake base plate body, an axis pin mounting hole is arranged at the center of the axis pin mounting seat, and the axis position error of the three holes of the axis pin mounting hole, the camshaft mounting hole and the center hole does not exceed 0.1mm.

[0005] The bottom of the axle pin mounting seat is provided with an axle pin locking groove, and the axle pin locking groove is communicated with the axle pin mounting hole.

[0006] The flange is provided with a sensor mounting hole.

[0007] An arc-shaped positioning groove is arranged below the center hole, a trapezoidal boss is arranged around the center hole, mounting holes for connecting with the bridge housing are arranged at the four corners of the trapezoidal boss, a positioning through hole is arranged between the trapezoidal boss and the brake base plate body, and an annular weight-reducing groove concentric with the center hole is arranged on the reverse side of the trapezoidal boss.

[0008] The brake base plate body is connected to the camshaft mounting seat via two figure eight reinforcing ribs. Six ear plates are arranged around the brake base plate body, and threaded holes are arranged at the centers of the ear plates.

[0009] Compared with the prior art, the utility model has the following advantages:

[0010] 1. The utility model changes the double-axle pin type into a single-axle pin type. On the one hand, due to the optimization of the axle pin mounting seat structure, the weight of the brake base plate is reduced, and the processing is simpler and the installation is more convenient; on the other hand, the axis position error of the three holes of the axle pin mounting hole, the center hole and the camshaft mounting hole does not exceed 0.1mm, which ensures the stability of braking and improves driving comfort.

[0011] 2. The utility model provides an axle pin locking groove connected to the axle pin mounting hole at the bottom of the axle pin mounting seat. The axle pin locking groove is mainly used to install a locking device to prevent the axle pin from falling off and causing safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a front structural schematic diagram of the utility model.

[0013] Figure 2 It is a schematic diagram of the reverse structure of the utility model.

[0014] Figure 3 It is a cross-sectional view of the utility model.

[0015] In the figure: brake base plate body 1, camshaft mounting seat 2, camshaft mounting hole 3, flange 4, center hole 5, axle pin mounting seat 6, axle pin mounting hole 7, axle pin locking groove 8, sensor mounting hole 9, arc-shaped positioning groove 10, trapezoidal boss 11, mounting hole 12, positioning through hole 13, annular weight-reducing groove 14, figure-eight reinforcing rib 15, ear plate 16, threaded hole 17, countersinking hole 18, weight-reducing groove 19, bolt avoidance groove 20, curved reinforcing rib 21. DETAILED DESCRIPTION

[0016] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0017] See also Figure 1-Figure 3A single-axis pin type brake base plate comprises a brake base plate body 1, a camshaft mounting seat 2 is installed on the brake base plate body 1, a camshaft mounting hole 3 is arranged at the center of the camshaft mounting seat 2, a flange 4 is installed on the camshaft mounting seat 2, a sensor mounting hole 9 is arranged on the flange 4, a center hole 5 is arranged at the center of the brake base plate body 1, an axis pin mounting seat 6 is arranged on the lower side of the brake base plate body 1, an axis pin mounting hole 7 is arranged at the center of the axis pin mounting seat 6, an axis pin locking groove 8 is arranged at the bottom of the axis pin mounting seat 6, the axis pin locking groove 8 is connected with the axis pin mounting hole 7, and the axis pin mounting hole 7, the camshaft mounting hole 3 and the center hole 5 have an axis position error of no more than 0.1mm.

[0018] A circular arc-shaped positioning groove 10 is arranged below the center hole 5 to facilitate the installation and positioning of the half-axle; a trapezoidal boss 11 is arranged around the center hole 5, and the four corners of the trapezoidal boss 11 are provided with mounting holes 12 for connecting with the bridge housing, and a countersunk hole 18 is arranged on the reverse side of the trapezoidal boss 11 at a position concentric with the mounting hole 12 to ensure that the bolts are securely fastened; a positioning through hole 13 is arranged between the trapezoidal boss 11 and the brake base plate body 1 for bridge housing installation; an annular weight-reducing groove 14 concentric with the center hole 5 is arranged on the reverse side of the trapezoidal boss 11 to reduce the weight of the brake base plate.

[0019] The brake base plate body 1 is connected to the camshaft mounting seat 2 by two figure eight reinforcing ribs 15. Six ear plates 16 are arranged around the brake base plate body 1. A threaded hole 17 is arranged at the center of the ear plate 16 for fixing the brake base plate dust cover to prevent dust and debris from entering and affecting the service life of the brake.

[0020] The reverse side of the axle pin mounting seat 6 is provided with a weight reduction groove 19 to further reduce the weight of the brake base plate, and a bolt avoidance groove 20 is provided above the weight reduction groove 19 to prevent the bridge housing-brake base plate connecting bolt from interfering with the axle pin mounting seat 6. The reverse side of the axle pin mounting seat 6 is connected to the brake base plate body 1 through two curved reinforcing ribs 21 to further enhance the strength of the brake base plate.

Claims

1. A single-axis pin type brake base plate, comprising a brake base plate body (1), a camshaft mounting seat (2) mounted on the brake base plate body (1), a camshaft mounting hole (3) being arranged at the center of the camshaft mounting seat (2), a flange (4) being mounted on the camshaft mounting seat (2), and a center hole (5) being arranged at the center of the brake base plate body (1), characterized in that: An axle pin mounting seat (6) is arranged at the lower side of the brake base plate body (1), an axle pin mounting hole (7) is arranged at the center of the axle pin mounting seat (6), and the axis position error of the three holes of the axle pin mounting hole (7), the camshaft mounting hole (3) and the center hole (5) does not exceed 0.1 mm.

2. The single-axle pin type brake base plate according to claim 1, characterized in that: The bottom of the axle pin mounting seat (6) is provided with an axle pin locking groove (8), and the axle pin locking groove (8) is connected to the axle pin mounting hole (7).

3. The single-axle pin type brake base plate according to claim 1, characterized in that: The flange (4) is provided with a sensor mounting hole (9).

4. The single-axle pin type brake base plate according to claim 1, characterized in that: A circular arc locating groove (10) is arranged below the center hole (5), a trapezoidal boss (11) is arranged around the center hole (5), four corners of the trapezoidal boss (11) are provided with mounting holes (12) for connecting with the bridge housing, a locating through hole (13) is arranged between the trapezoidal boss (11) and the brake base plate body (1), and an annular weight-reducing groove (14) concentric with the center hole (5) is arranged on the reverse side of the trapezoidal boss (11).

5. The single-axle pin type brake base plate according to claim 1, characterized in that: The brake base plate body (1) is connected to the camshaft mounting seat (2) via two splayed reinforcing ribs (15). Six ear plates (16) are provided around the brake base plate body (1). A threaded hole (17) is provided at the center of the ear plate (16).

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