KR200281970Y1 - Cover shim of disc brake - Google Patents

Abstract

The present invention relates to a cover shim of a disc brake, the purpose of which is to reduce the braking noise by improving the damping performance of the cover shim provided between the pad plate and the piston end surface.

The cover shim 800 of the disc brake according to the present invention is formed in a stack shape and is installed to cover the side portion of the inner pad plate 500 in contact with the front end surface of the piston 200, so that the braking frictional heat and the pad plate 500 are covered. To prevent vibration from being transmitted directly to the piston 200 side, a damping plate 830 made of a porous rubber material is attached between the inner plate 810 and the outer plate 820 of the cover shim 800 to improve damping performance.

Therefore, most of the vibration transmitted from the pad plate 500 that rubs against the disk 700 is lost by the vibration damping plate 830 inside the cover shim 800 and is prevented from being transmitted to the piston 200, thereby reducing braking noise. This has the advantage of improving the reliability of the overall disc brake.

Description

Cover shim of disc brake

The present invention relates to a disc brake, and more particularly, to a cover shim provided to surround the outer surface of the inner pad plate to prevent braking friction heat from being transferred to the piston side.

In general, a brake mounted on a vehicle is a device for decelerating, stopping or maintaining a vehicle while driving, and converts kinetic energy during driving into thermal energy by a mechanical friction device to release its frictional heat into the air to brake. Drum type hydraulic brakes and disc type hydraulic brakes.

Disc brake is to obtain a braking force by pressing the disk-shaped disk that rotates with the wheel instead of the drum with a pad on both sides. 1 is a plan sectional view showing the overall structure of such a disc brake.

As shown in the related art, the disc brake is divided into a housing 10 in which the piston 20 is installed and a carrier 40 fixed to the vehicle body and in which pad plates 50 and 60 are installed. The housing 10 has a cylinder 11 formed therein, and the piston 20 is configured to move back and forth by the braking hydraulic pressure transmitted through the inlet 12. In addition, fastening holes 13 are formed at both ends of the housing 10, respectively, for fastening with the carrier 40.

The carrier 40 is provided with a pair of pad plates 50 and 60 to which the pads 51 and 61 are attached. The pad plates 50 and 60 are spaced apart by a predetermined interval so as to move forward and backward within the carrier 40, which is an outer pad plate 50 to which the inner pad 51 is attached and an outer pad 61 to which the outer pad 61 is attached. The pad plate 60 is formed. The outer surface of the inner pad plate 50 is configured to be in contact with the piston 20 moving forward and backward, and the outer surface of the outer pad plate 60 is in contact with the finger portion 15 extending from the housing 10. It is installed to move forward when braking. Between the pair of pads 51 and 61, a disk-like disk 70 is inserted which is inserted into a part of its outer circumference and rotates together with a wheel (not shown) with a predetermined gap therebetween. In addition, a soft boot 16 for preventing foreign matter from entering the inlet of the cylinder 11 is installed, and a cover shim 80 made of steel sheet is provided to surround the outer surface of the inner pad plate 50. have. Therefore, the braking heat generated by the friction between the disk 70 and the pad 51 is prevented from being transferred to the piston 20 side, thereby preventing the boot 16 from being burned out by heat.

And the housing 10, the piston 20 is installed, and the carrier plate 40, the pad plate (50, 60) is installed is slidably coupled, these coupling structures are as follows. First, fastening holes 13 are formed at both ends of the housing 10, as described above, and fastening grooves 41 having a predetermined depth are formed at both ends of the carrier 40 so as to face the fastening holes 13. have. Accordingly, one end of the guide rod 30 is fixedly fastened to the fastening hole 13 using the bolt 14, and the other end thereof is inserted into the fastening groove 41 so as to be freely inserted therein, thereby fixing the carrier 40 to the vehicle body. The housing 10 is coupled to. Reference numeral 21 is a seal for restoring the piston 20 when the hydraulic pressure is released to the cylinder 11.

When driving a vehicle having a general disc brake configured as described above, when a driver presses a brake pedal (not shown), a braking hydraulic pressure is generated from a master cylinder, which is not shown, and the braking hydraulic pressure is continuously applied to the cylinder 11 through the inlet 12. Is passed into). Therefore, by advancing the piston 20 by braking hydraulic pressure, the inner pad 51 attached to the inner pad plate 50 is momentarily compressed to the side surface of the disk 70 that rotates together with a wheel (not shown). In addition, since the hydraulic pressure is present in the cylinder 11, the housing 10 itself slidably fastened to the carrier 40 through the guide rod 30 moves in the opposite direction, whereby the finger 15 is disposed on the outer pad. The plate 60 is pushed, and the outer pad 61 attached to the outer pad plate 60 is pressed to the side surface of the disk 70 to brake.

At this time, a significant braking heat is generated during the braking operation, which is prevented from being directly transmitted to the piston 20 by the cover shim 80 provided to surround the pad plate 50, thereby preventing the burn 16 from being burned. When the brake pedal (not shown) is released, the piston 20 is restored to its original position due to the elastic restoring force of the seal 21, and the disks 70 and the pads 51 and 61 are spaced apart from each other at regular intervals.

However, the disc brake is spaced apart from the disc 70 by shaking the pad plates 50 and 60 to which the pads 51 and 61 are attached. Such vibrations are directed to the piston 20 through the cover shim 80 formed of steel sheet. Transmitted, another braking noise is generated.

That is, when the braking action is released, since the inner surfaces of the pads 51 and 61 are spaced apart from each other by friction with the disk 70 which rotates at high speed with the wheel, the pad plates 50 and 60 tremble, and the vibration is caused by the pad plate 50. By passing directly to the piston 20 through the cover shim (80) surrounding the outer surface there is a problem that the entire housing (10) is vibrated to increase the braking noise of the overall disc brake.

The present invention is to solve this problem, the object of the present invention is to cover the side surface of the inner pad plate in contact with the front end of the piston cover is installed in the form of a laminate so that the brake friction heat and the vibration of the pad plate is transmitted to the piston side By attaching a vibration damping plate made of a porous rubber material that improves damping performance between the outer shell and the inner shell of the cover core, most of the vibration transmitted from the pad plate is transmitted to the lost piston side by the vibration damping plate inside the cover core. This provides a cover shim for the disc brake that is prevented and the braking noise is significantly reduced.

1 is a plan sectional view showing the overall structure of a conventional disc brake.

Figure 2 is a plan sectional view showing the overall structure of the disc brake according to the present invention.

3 is a schematic view showing an extract of the structure of the cover shim according to the present invention installed to cover the outer surface of the pad plate.

* Description of symbols on the main parts of the drawings *

100. Housing 200. Piston 400 Carrier

Inner pad plate 500 Inner pad 600 Outer pad plate

610 outer pad 700 disc 800 cover shim

810 .. Inner 820. Outer 830.

840..Combination

The present invention for achieving this purpose, the disk on the disk rotates with the wheel, the piston moving forward and backward by the braking hydraulic pressure, the front end face of the piston is provided on the center of the braking action by friction with the side of the disk when the piston advances In the pad brake with a pad, the disk brake having a cover core made of a laminated shape to surround the outer surface of the pad plate in contact with the piston to prevent the braking heat is transmitted to the piston side,

The cover shim is characterized in that it is provided between the inner plate and the outer plate, the vibration damping plate made of a porous rubber material to reduce the vibration noise transmitted from the inner plate and the outer plate.

Hereinafter, one preferred embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a plan sectional view showing the overall structure of the disc brake according to the present invention, Figure 3 is a perspective view showing a partially cut cover core according to the present invention.

Disc brake according to the present invention, as shown in these, the piston 200 which moves forward and backward by hydraulic pressure is installed in the cylinder 110 of the housing 100 forming the outer body, the central portion of the carrier 400 A pair of pad plates 500 and 600 to which the pads 510 and 610 are attached are configured. Both ends of the housing 100 are formed with a fastening hole 130 to which the guide rod 300 to be described later is fastened to the bolt 140, and reference numeral 210 is a seal for restoring the piston 200.

Fastening grooves 410 are formed at both ends of the carrier 400 fixed to the vehicle body, and the guide rod 300 fastened to the fastening hole 130 by the bolt 140 is fitted therein so as to be freely coupled to the housing 100. Both ends are slidably fastened. The carrier 400 is provided with pad plates 500 and 600 having pads 510 and 610 respectively attached to one surface thereof, which is an outer pad plate 500 having an inner pad 510 and an outer pad 610 attached thereto. The pad plate 600 is distinguished. The inner pad plate 500 is advanced inward due to the forward movement of the piston 200, and the outer pad plate 600 is advanced inward by the finger part 150 of the housing 100. In addition, a portion of the disc-shaped disc 700 that rotates together with the wheel (not shown) of the vehicle is inserted and rotated between the inner pad 510 and the outer pad 610.

On the other hand, the outer surface of the inner pad plate 500 that is in contact with the front end surface of the piston 200 is fixed through the engaging piece 840 formed plate-like cover core 800 to cover it, the pad 510 The frictional heat with the disk 700 is not directly transmitted to the piston 200 by the cover shim 800, thereby preventing damage to the boot 160 installed at the inlet of the cylinder 110. The cover shim 800 has a vibration damping plate 830 configured to attenuate vibration by improving damping performance as a characteristic element of the present invention. That is, the cover shim 800 is formed of a steel plate is provided with the inner plate 810 and the engaging piece 840 in contact with the outer surface of the pad plate 500 and the outer plate 820 in contact with the piston 200 in the center, such an inner plate The vibration damping plate 830 is integrally attached between the 810 and the outer plate 820. The vibration damping plate 830 is made of a rubber material and has excellent damping performance and has a porous honeycomb structure, thereby preventing the vibration transmitted from the pad plate 500 to be transmitted to the piston 200. On the other hand, the cover core (800) structure surrounding the outer surface of the outer pad plate 600 is also made the same, of course, the vibration is transmitted to the finger portion 150 is also prevented.

Next, the operation of the disc brake according to the present invention configured as described above will be described. When the driver steps on the brake pedal (not shown) when the vehicle moves forward, the braking hydraulic pressure is transmitted from the master cylinder (not shown) into the cylinder 110 through the inlet port 120 so that the piston 200 moves forward. Accordingly, the inner pad plate 500 installed in the carrier 400 so as to move forward and backward is moved forward, and the inner pad 510 attached thereto is friction with the side of the disk 700 that rotates together with the wheel to perform a braking action. Done. At the same time, the outer pad 610 of the outer plate 600 is the disk 700 by the finger portion 150 by sliding the housing 100 in the opposite direction of the piston 200 advance by the hydraulic pressure remaining in the cylinder 110. ) And friction braking.

When the driver releases the brake pedal and the brake hydraulic pressure is released, the piston 200 is restored to its original position by the restoring force of the seal 210, and the inner pad 510 and the outer pad 610 rotate at high speed. Again with friction).

At this time, the pad plates 500 and 600 to which the pads 510 and 610 are attached are shaken, and most of the vibrations are attenuated by the vibration damping plate 830 of the cover shim 800 having excellent damping performance. It is prevented from being transmitted to the piston 200, so that the overall operating noise due to the braking action is greatly reduced.

This technical idea is not limited to this, and although not shown, it is a matter of course that the desired purpose of the present invention can be achieved even if the vibration damping plate of the cover core is made of a lattice mesh of rubber material.

As described in detail above, the cover shim of the disc brake according to the present invention is formed in a stack shape and is installed to cover the side portion of the inner pad plate in contact with the front end surface of the piston, so that the braking frictional heat and the vibration of the pad plate are directly transmitted to the piston side. In order to prevent this, a damping plate made of a porous rubber material is attached between the inner and outer plates of the cover shim to improve damping performance.

Therefore, most of the vibration transmitted from the pad plate in friction with the disk is prevented from being lost by the vibration damping plate inside the cover shim and transmitted to the piston side, thereby reducing the braking noise, thereby improving overall reliability of the disk brake.

Claims (1)

The disk 700 that rotates with the wheel, the piston 200 to move forward and backward by braking hydraulic pressure, the front end surface of the piston 200 is provided on the center contact the disk 700 when the piston 200 is advancing The pad plate 500 is attached to the pad 510 and the pad plate 500 is in contact with the piston 200, and the braking heat is transferred to the piston 200. In the disc brake having a cover shim 800 made of a laminated shape to prevent the The cover shim 800 is made of a porous rubber material to reduce vibration noise transmitted between the inner plate 810 and the outer plate 820, the inner plate 810 and the outer plate 820, and transmitted from the pad plate 500. A cover shim for a disc brake, comprising a vibration damping plate (830).