KR20030034883A - A structure of back plate for brake pad - Google Patents

Abstract

PURPOSE: Back plate structure for a brake pad is provided to minimize uneven wear of a brake pad, to reduce noise, and to improve braking performance by offsetting moment of the brake pad. CONSTITUTION: A back plate is composed of a first back plate(1); a second back plate(7) combined with the first back plate by a hinge shaft(5); and an elastic supporting unit inserted between first and second back plates to support elastically for widening first and second back plates around the hinge shaft. The elastic supporting unit has spring seats(11,13) and a spring(15) placed on spring seats. Uneven wear is prevented by contacting a brake pad(104) to a brake disc evenly. The durability of the brake pad is increased by preventing judder and improving braking force.

Description

B STRUCTURE OF BACK PLATE FOR BRAKE PAD}

The present invention relates to a caliper of an automobile brake device, and more particularly to a structure of a back plate for supporting a brake pad.

The brake of a vehicle is used to slow down the speed of a vehicle or to maintain a stable state of a vehicle. In general, the brake of a vehicle is operated by a pedal to control the speed of a vehicle or maintain a temporary stop state while the driver frequently operates the vehicle while driving. .

Looking at the general structure of the hydraulic brake, the brake pedal which is operated by the driver's brake, the brake cylinder boosted by the brake booster to amplify the operating force of the brake pedal to generate a high pressure brake oil pressure, and the oil provided from the master cylinder It consists of a caliper that grabs the brake disc of the wheel with pressure and generates braking force.

Here, looking at the mechanism for generating a braking force on the brake disk of the wheel with reference to Figures 1 and 2, the brake disk 100 integrally connected to the wheel is brake pads on both sides by a caliper 102 fixed to the knuckle side 104 is installed to be in close contact, the brake pad 104 is in close contact with the brake disc 100 by the movement of the piston 108 is operated in the cylinder 106 provided in the caliper (102). Since the pressure of the brake pad 104 compresses the brake disc 100 varies according to the degree of oil pressure provided to the cylinder 106 of the caliper 102, the desired braking force can be obtained. To make it work.

As shown in FIG. 3, the brake pads are pressed to the brake discs to cause a braking action, as shown in FIG. 3. The brake pad inner 104 'is rotated between the brake pad inner 104' supported by ") and the brake pad outerer 104 ", and the brake pad inner 104 'has a clockwise moment m'. The brake pad outer 104 " receives the moment m " in the counterclockwise direction, and the amount of wear of the brake pads 104 is represented by the hatched portion.

However, in the actual vehicle, since the back plates 110 ′ and 110 ″ supporting the brake pad inner 104 ′ and the brake pad outlet 104 ″ are respectively mounted in one caliper housing, the inner side and the outer The moment direction of the side cannot be different, and the main moment M acting on the entire caliper 102 becomes clockwise as shown.

As a result, the brake pad outer 104 " cancels the direction of the moment m " and the main moment M in its own monolithic state, thereby substantially reducing the occurrence of substantial uneven wear.

On the contrary, in the brake pad inner 104 ', since the direction of the main moment M coincides with the direction of the one-piece state moment m', the occurrence of uneven wear is further increased, resulting in uneven wear of the brake pad. This is the main cause of lowering of braking force and vibration during braking.

Accordingly, the present invention has been made in view of the problems described above, and minimizes the uneven wear phenomenon of the brake pads caused by the above-mentioned causes, so that the back of the brake pad can ensure stable and quiet braking performance. The purpose is to provide a plate structure.

1 is a structural diagram showing a part of a general automobile brake device,

2 is an exploded perspective view of the general caliper of FIG.

3 is an explanatory diagram illustrating a problem of the prior art;

4 is an exploded perspective view illustrating a back plate structure of a brake pad according to the present invention;

5 is an operation explanatory diagram of the section V-V of FIG. 4;

6 is an explanatory view of the cross section taken along the line VI-VI in FIG. 4.

<Description of Symbols for Main Parts of Drawings>

One; First backplates 3 and 9; Hinge connection

5; Hinge axis 7; Second back plate

11,13; Spring seat 15; spring

17; Stopper 104; Brake pads

The brake pad back plate structure of the present invention for achieving the above object is a first back plate, a second back plate which is coupled to the first back plate by a hinge axis, the first back plate and the second Interposed on the back plate is characterized in that it comprises an elastic support means for elastically supporting the first back plate and the second back plate about the hinge axis.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings. In addition, the names and signs of the same parts as those used in the description of the prior art will be described using the same.

4 to 6 illustrate a brake pad back plate structure according to the present invention, in which a brake pad, a first back plate, and a second back plate are separated.

That is, the second back plate 7 is connected to the hinge connecting portion 3 provided at one side and the first back plate 1 is located at the outermost side, and the second back plate 7 is connected to the hinge connecting portion 9. In this case, the hinge shaft 5 and the hinge connecting portions 3 and 9 are positioned to have less wear of the brake pad 104.

In addition, the first back plate 1 and the second back plate 7 are elastically supported in a direction in which the first back plate 1 and the second back plate 7 are opened around the hinge axis 5. The elastic support means is interposed, the elastic support means in this embodiment is a spring sheet (11, 13) formed on the first back plate 1 and the second back plate 7, respectively, and the spring sheet ( 11, 13) was composed of a spring (15) seated.

Here, the spring seats (11, 13) is to be fixed to prevent the spring (15) is inserted and moved to be easily formed by press working or the like on the first back plate 1 and the second back plate (7). The number of the springs 15 and the spring seats 11 and 13 may vary depending on the needs of the model to be applied.

On the other hand, the brake pad 104 is directly coupled to the second back plate 7, the back plate structure having the first back plate 1, the second back plate 7 and the elastic support means as described above is As described in the prior art, it is used for brake pads with severe wear.

In addition, the first back plate 1 is provided with a stopper 17 so as to limit the rotational play of the second back plate 7 opened by the spring 15.

Referring to the operation of the present invention configured as described above are as follows.

When the brake is inoperative, the first back plate 1 and the second back plate 7 are opened by the force of the spring 15, at which time the stopper 17 provided in the first back plate 1 is opened. ), Excessive play of the second back plate 7 is in a prevented state.

When the brake is operated, the brake pad 104 having the back plate structure as described above is additionally subjected to the elastic force provided by the spring 15 when the brake disk 100 is pressed, and the spring 15 is The elastic force is provided so that the brake pad 104 is pressed against the rotating brake disc 100 so as to form a moment acting in a direction opposite to the direction of the moment received by the brake pad 104 and the main moment received by the entire caliper. The effect of canceling moments is brought about.

Accordingly, the brake pad 104 can be pressed against the brake disc 100 at an even pressure, deviating from the moment biased to one side, thereby preventing uneven wear, thereby preventing Judder generated by uneven wear during operation of the brake. To ensure a smooth braking force and to improve the durability of the brake pad 104.

According to the present invention as described above, by providing a brake pad back plate structure that can cancel the moment generated in the brake pad, to minimize the uneven wear phenomenon of the brake pad, to ensure a stable and quiet braking performance.

Claims (3)

The first back plate, A second back plate having one side coupled to the first back plate by a hinge axis; An elastic support means interposed in the first back plate and the second back plate to elastically support the first back plate and the second back plate in the opening direction about the hinge axis; Brake pad back plate structure, characterized in that consisting of. The method of claim 1, The elastic support means Spring sheets formed on the first back plate and the second back plate, respectively; A spring seated on the spring seat Brake pad back plate structure, characterized in that consisting of. The method of claim 1, The first back plate of the brake pad back plate structure, characterized in that the stopper is further provided to limit the rotational play of the second back plate is opened by the spring.