KR20060099067A - A shim of disk brake - Google Patents

Abstract

The present invention provides a shim of the brake disc that can be guided and maintained by the guide groove formed in the shim is pushed due to the pressing force of the piston to prevent the gap caused by agglomeration of the adhesive to the pad plate and the screening. The shim consists of a plurality of guide grooves formed radially outwardly about the pressing area of the piston for guiding and retaining the adhesive pushed due to the operation of the machine piston.

Description

A shim of disk brake

1 is a cross-sectional view of a general disc brake.

2 is a partially enlarged cross-sectional view illustrating an adhesive structure of a pad plate and a shim of the disc brake of FIG. 1.

3 is a partially enlarged cross-sectional view illustrating a deformation state of a shim and an adhesive during the braking operation of FIG. 2.

Figure 4 is a partially enlarged cross-sectional view showing the adhesive structure of the shim pad plate and shim of the brake according to the present invention.

5 is a partially enlarged cross-sectional view illustrating a deformation state of a shim and an adhesive during the braking operation of FIG. 4.

6 to 8 are plan views illustrating various embodiments of a shim according to the present invention.

Explanation of symbols on the main parts of the drawings

10: shim 10a: guide groove

12: adhesive 14: pad plate

16: brake disc 18: brake pad

20: piston

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to shims of disc brakes, and more particularly to adhesives used to attach shims to brake pad plates that can prevent agglomeration between pad pads and screens from forming gaps between them. It's about the Sim.

In general, a vehicle is essentially equipped with a brake for decelerating, stopping or maintaining a stopped state of a vehicle while driving. Such brakes include drum brakes and disc brakes, which convert kinetic energy during driving into thermal energy through mechanical friction devices and release their frictional heat into the air to brake.

The disc brake is configured to generate a braking force by strongly pressing a disc-shaped disc that rotates together with a wheel instead of a drum by pads on both sides. As shown in FIG. 1, a disc brake has a disc 1 that rotates with a wheel or wheel, and a pair of pad plates 2 having brake pads 2a and 3a attached to both sides of the disc 1. , 3). The pad plates 2, 3 are linked to the caliper housing 4 to be pressed towards the disk 1. The caliper housing 4 is provided with a cylinder portion 4a provided with a piston 5 on one side thereof, and is provided on the other side of the cylinder portion 4a, and is connected by a connecting portion (not shown) to the rear surface of the opposite pad plate 3. It consists of the finger part 4b which supports.

When the brake brake is supplied into the cylinder portion 4a of the caliper housing 4, the disc brake presses one pad plate 2 as the piston 5 flows in, and the cylinder of the caliper housing 4. The portion 4b presses the other pad plate 3 through the finger portion 4b connected thereto while moving in the direction opposite to the movement of the piston 5. Therefore, the brake pads 2a and 3a of the pad plates 2 and 3 on both sides press the surface of the brake disc 1 by the operation of the caliper housing 4 to brake.

Meanwhile, a shim 6 is attached to an outer surface of each pad plate 2 to prevent noise or smooth operation during brake operation by the operation of the piston 5 of the caliper housing. As shown in FIGS. 2 and 3, the shim 6 is attached to the pad plate 2 by an adhesive 7.

However, this shim 6 has been shown to cause problems when braking or prolonged use. In other words, due to the continuous operation of the piston (5), the adhesive (7) is pushed together around the operating range (A) of the piston to form a dome (7a) shape, which results in the shim (6) and the adhesive (7) or There was a problem that a gap C was generated between the pad plates 2.

As such, when the gap is generated, the hydraulic force for operating the piston must be excessively consumed, and ultimately, the contact between the brake pad and the disc is incompletely made, which causes a problem in that the braking performance is lowered.

The present invention solves these problems, and an object of the present invention is to prevent agglomeration of the adhesive due to the push of the adhesive used to attach the shim to the pad plate and to prevent the formation of a gap between the pad plate and the shim. It is to provide a shim for disc brake.

Another object of the present invention is to provide a disc brake shim capable of preventing excessive consumption of hydraulic force required for a piston for pressing the pad plate.

The present invention for achieving this object is an adhesive that is pushed due to the operation of the piston in the shim of the disc brake is attached by an adhesive to the outer surface of the pad plate to prevent the occurrence of noise due to contact between the piston and the pad plate A plurality of guide grooves are formed in the radially outer side of the pressing area of the piston to guide the.

In addition, the shim is characterized in that it is formed at a predetermined interval on the two circular regions located radially outward with respect to the pressing region of the piston.

In addition, each of the guide grooves is characterized in that formed in one of the garden, oval, cone.

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

As shown in FIGS. 4 and 5, the shim 10 according to the invention is attached to the outer surface of the pad plate 14 by an adhesive 12. Of course, a brake pad 18 is attached to the inner surface of the pad plate 14 that contacts the brake disc 16 and provides a practical braking force. Outside the shim 10 is provided with a piston 20 that is operated by hydraulic pressure in connection with a caliper housing (not shown).

In particular, the seam 10 according to the present invention is formed with a plurality of guide grooves 10a for guiding and holding the adhesive 12 that can be pushed due to the pressurization of the seam 10 when the piston 20 is pressed. .

As illustrated in FIGS. 6 to 8, various types of guide grooves 10a may be formed in the shim 10 according to the present invention. In addition, it is preferable that each guide groove 10a is formed at a predetermined interval on two circular regions that can be located in a direction about the pressing region P on which the piston 20 acts.

As shown in FIG. 6, according to one embodiment, a plurality of guide grooves 12 are drilled on two circular regions that can be located radially about a pressing region pressed by the piston 20. Can be. Here, each of the guide grooves 12 may have a garden cross section.

As shown in FIG. 7, according to another embodiment, a plurality of guide grooves 12 may be drilled on two circular regions that may be located radially about a pressing region where the piston 20 is pressed. Each guide groove 12 may have an elliptical cross section.

As shown in FIG. 8, according to another embodiment, a plurality of guide grooves 12 are drilled on two circular regions, which may also be located radially about the pressing region where the piston 20 is pressurized. Can be. Here each guide groove 12 may be made of a conical with a round.

The following describes the operation of the disc brake shim according to the present invention.

Although the adhesive 12 is uniformly distributed between the shim 10 and the pad in the initial state, that is, the state in which it is not used or the brake is not activated, the piston 20 is frequently shim 10 as time passes. ), As shown in FIG. 4, the adhesive 12 may be pushed out of the piston pressurizing region and guided to the guide groove 12 to be maintained there or discharged to the outside. Therefore, between the shim 10 and the pad plate 14 is prevented from agglomeration due to the push of the adhesive can be prevented from eventually forming a gap between the shim 10 and the pad plate 14. In addition, it is possible to maintain a uniform attachment state without a gap or gap between the shim 10 and the pad plate 14.

In this state, as shown in FIG. 5, when the piston 20 presses the shim 10 for braking, the pad plate 14 can press toward the brake disc 16 as in the initial state. . Therefore, the hydraulic force for operating the piston can also be provided uniformly, thereby preventing the consumption of excessive hydraulic force.

As described above, according to the shim of the disc brake according to the present invention, since the adhesive is pushed due to the pressing force of the piston is guided to the guide groove formed in the shim, the gap between the pad plate and the screen is generated due to the agglomeration of the adhesive. There is an effect that can be prevented.

In addition, since the gap between the shim and the pad plate is prevented, there is an effect of preventing excessive consumption of hydraulic force required for braking.

Claims (3)

In the shim of a disc brake attached by an adhesive to the outer surface of the pad plate to prevent the occurrence of noise due to contact between the piston and the pad plate, And a plurality of guide grooves formed radially outward of the pressing area of the piston to guide the adhesive pushed due to the operation of the piston. 2. The disc brake shim according to claim 1, wherein the shim is formed at regular intervals on two circular regions located radially outward with respect to the pressure zone of the piston. 3. The shim of a disc brake according to claim 1 or 2, wherein each of the guide grooves is formed in one of a garden shape, an oval shape, and a cone shape.

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