KR101064136B1 - Drum brake - Google Patents

Abstract

The present invention relates to a drum brake device, and more particularly, to a structure of a mounting plate constituting part of a drum brake device and a cable bracket for supporting a cable.

The present invention is a drum brake device, there is a rotating lever for operating the operating lever, the cable is coupled to the rotating lever, the cable bracket for fixing and supporting the cable and to take the tension of the cable in a certain direction extends from the mounting plate It is characterized in that it is formed as an integral, there is an effect that can reduce the cost and time and weight of the product when manufacturing the drum brake device by eliminating the fastener that was used to combine both conventionally.

Description

Drum Brake {DRUM BRAKE}

1 is a perspective view showing a conventional drum brake device.

Figure 2 is a view showing the shape of the rear portion of a conventional drum brake device.

3 is a view showing a mounting plate of a conventional drum brake device.

Figure 4 is a view showing the shape of the rear portion of the drum brake apparatus according to the present invention.

5 is a view showing a mounting plate and a cable bracket of the drum brake apparatus according to the present invention.

[Description of the Reference Numerals]

12 bolt 13 assembly screw

30a: first brake shoe 30b: second brake shoe

60: operating lever 61: rotating lever

100: mounting plate 110: cable bracket

200: backplate

The present invention relates to a drum brake device, and more particularly, to a structure of a mounting plate constituting part of a drum brake device and a cable bracket for supporting a cable.

In general, a drum brake mounted on a vehicle is a device that obtains a braking force by rubbing a cylindrical drum (not shown) rotating together with a wheel (liner) with the linings 31a and 31b therein.

The drum brake contacts the inner circumferential surface of the drum and supports the rims 32a and 32b having the linings 31a and 31b attached thereto and the inner circumferential surfaces of the rims 32a and 32b to reinforce rigidity of the rim. The pair of brake shoes 30a and 30b made of the webs 33a and 33b are pushed toward the inner circumferential surface of the drum by the operation of the operation lever 60 to perform a braking action. In addition, the lower ends of the two brake shoes 30a and 30b support the lower ends of the webs 33a and 33b of the two brake shoes 30a and 30b, and at the same time adjust the lengths of the drum and both of the brake shoes 30a. A gap adjusting device 50 is installed to adjust the gap therebetween. At this time, when the operation of the operating lever 60 is released, the two brake shoes 30a and 30b are returned to their original positions by the restoring spring 40, thereby enabling normal driving again.

The braking part including parts such as the two brake shoes 30a and 30b, the operation lever 60, and the restoring spring 40 is supported by a support plate, and the role of the support plate is generally adjusted by the mounting plate 10. do. The back plate 20 is literally a rear support portion of the drum brake device, which is a part that engages the knuckle of the vehicle body. This structure can be changed depending on the characteristics of the vehicle or the characteristics of the drum brake. The mounting plate 10 and the back plate 20 are coupled to each other by a coupling support member 14.

The drum brake, which brakes a fast rotating wheel by contact friction, is subject to enormous moments or torsional stresses. Therefore, the backplate needs to be rigidly reinforced, and the mounting plate is adopted to reinforce such backplate. It is coupled to the vehicle body together with the plate.

On the other hand, the operating lever 60, which acts to push the brake shoes (30a, 30b) to the inner circumferential surface of the drum is coupled with the rotation lever 61 for operating the operation lever 60, the rotation lever 61 ) Is coupled to the cable (not shown) and when the tension is applied to the cable, the pivoting lever 61 is pulled, and thus the operating lever 60 is operated. A device for stably supporting such a cable is a cable bracket (11). The cable bracket 11 is often fastened with the mounting plate 10 because the cable tension is to be fixed in a certain direction.

Conventionally, the cable bracket 11 is fastened by the mounting plate 10 and the fasteners 12 such as bolts, and thus, a process of providing an assembly screw part 13 for fastening the bolts 12 in the process. There was a problem that the production time and cost increase by adding a process of fastening the cable bracket to the mounting plate by using the bolts, there was a problem that the weight increases by increasing the number of parts.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to reduce the manufacturing cost, time and weight of the drum brake device by eliminating fasteners such as bolts for fastening the mounting plate and the cable bracket.

The present invention for achieving the above object is the first brake shoes and the second brake shoes respectively installed on both sides of the drum for braking of the drum rotating with the wheel, the parking brake is pulled when the both side brake shoes An operating lever for pushing toward the inner surface of the drum, a combined lever operated by the cable and operated by the cable to operate the operating lever, a restoring spring for repositioning the both brake shoes, and a clearance adjustment for adjusting the gap between the brake shoes. A drum brake device comprising a back plate for supporting a braking part including a device and a mounting plate coupled with the back plate to reinforce the rigidity of the back plate, the rotation lever for operating the actuating lever. Is coupled to the cable, and the cable is fixed and supported. It is characterized by a cable bracket so as to take in a certain direction that extends from the mounting plate formed as one body. That is, it is not fastened by any fastener between the cable bracket and the mounting plate, it is characterized in that it is formed integrally as one component.

In addition, the cable bracket is formed by extending from the mounting plate is bent and characterized in that the groove is formed to support the cable, bent in the direction to move the rotation lever to operate the operating lever is formed. It is characterized by.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

Drum brake apparatus according to the present invention, except for the structure of the mounting plate and the cable bracket is almost similar to the structure of a general drum brake operated by the cable will be described with reference to FIG.

When the vehicle is parked or the like, the cable (not shown) pulls the pivoting lever 61 protruding to the rear portion of the drum brake by pulling the handle of the parking brake. Here, the rear part of the drum brake refers to a surface on which the back plate 20 is coupled to the mounting plate 10 and coupled to the vehicle body. Meanwhile, the rotation lever 61 operates the operation lever 60 and the operation lever 60 pushes both brake shoes 30a and 30b to cause friction with the drum to perform a braking action. At this time, when the tension of the cable is extinguished, the rotating lever and the operating lever are returned, and the both brake shoes 30a and 30b are returned to their original positions by the restoring spring 40.

Here, as shown in FIG. 4, when the rear portion of the drum brake according to the present invention is viewed, the pivoting lever 61 for operating the actuating lever protrudes to the rear portion of the back plate 200 and the cable (not shown). ) Will combine. The cable at this time is usually combined with a cylinder for adjusting the tension of the cable. The cable bracket is fixed and supported so that tension is applied in a predetermined direction. As shown in FIGS. 4 and 5, in the drum brake device according to the present invention, the mounting plate 100 and the cable bracket 110 are integrally formed. Formed. That is, each mounting plate and the cable bracket are not fastened by separate fasteners, but the mounting plate 100 and the cable bracket 110 are integrated as one component.

The cable bracket 110 is formed to be bent to easily support the cable is formed with a groove for inserting the cable or the cylinder coupled to the cable.

As described in detail above, the present invention eliminates the fasteners used to couple the drum brake device by combining the mounting plate for coupling with the back plate and the cable bracket for supporting the cable in the drum brake device. There is an effect that can reduce the cost, time and weight of the product when manufacturing.

Claims (3)

First brake shoes and second brake shoes respectively installed on both sides of the drum for braking the drum rotating together with the wheel, and an operation lever for pushing both brake shoes toward the inner surface of the drum when the parking cable is pulled. The bag supports the brake unit including a rotation lever operating by a cable and operating the operating lever, a restoring spring for repositioning both brake shoes, and a clearance adjusting device for adjusting a gap between the brake shoes. In the drum brake device comprising a plate and a mounting plate coupled to the back plate to reinforce the rigidity of the back plate, And a cable bracket for supporting the cable coupled to the mounting plate and the pivot lever. The method of claim 1, And the cable bracket extends from the mounting plate and is bent, and a groove is formed to support the cable. The method of claim 1, The cable bracket is a drum brake device, characterized in that formed in the direction to move the rotation lever to operate the operating lever.

Images