KR20020054429A - Disc brake assembly with damping device - Google Patents

Abstract

PURPOSE: A disk brake assembly containing a damper is provided to prevent noise and vibration from being transferred into a chassis by improving combined portion between a disk and a carrier. CONSTITUTION: A disk brake assembly having a damper comprises a piston(20) moving through brake pressure by being mounted in a caliper housing(10); inner and outer pad plates(50,60) installed on a carrier(30); pads(51,61) inserted between the pad plates; a disk(70) rotated with a wheel(A); a cylinder(11) installed on a rear portion of the housing; a finger unit(12) operating an outer pad plate; a seal(13) returning the piston by being mounted on an inner circumference of the cylinder; a guide rod slidingly combining the housing to the carrier; and a guide groove(31) guiding the pad plates by being mounted on the carrier; frictional unit(72) arranged between the pad plates; a combining unit(71) combined to a middle portion of the wheel through a mounting bolt; a bolt combing unit formed on the carrier; a metal plate(81) mounted on a first damper member(80); and a through hole penetrated on the metal plate.

Description

Disc brake assembly with damping device

The present invention relates to a disc brake assembly with a vibration isolator, and more particularly to a disc brake with a vibration isolator to prevent the vibration and noise generated during braking action to be transmitted to the vehicle body through the knuckle portion and the wheel. .

In general, the disc brake is to obtain a braking force by pressing the disk-shaped disk that rotates with the wheel with a pad from both sides, the structure is as follows.

Conventional disc brakes include a caliper housing with a piston built in such a way as to move back and forth by braking hydraulic pressure, a caliper housing is slidably coupled, and a pair of pad plates are slidably inserted therein, and a portion of the outer circumference is inserted between the pad plates. And a disk that rotates with the wheel.

In the rear part of the caliper housing, a cylinder for transmitting the braking hydraulic pressure is machined, and the front part thereof is integrally provided with a finger portion bent downward to surround the outer pad plate, which will be described later. It comes in close contact with.

The carrier is fixed to the knuckle portion of the vehicle body through bolts, and a pair of pad plates with pads attached thereto are slidably installed inward. The pad plate is distinguished from an inner pad plate disposed to be in direct contact with the piston, and an outer pad plate disposed to be in contact with the inner surface of the finger.

And the disk is made of a disk shape, the center of which is fastened through the bolt to the center of the wheel is rotated integrally therewith. At this time, a part of the outer circumference of the disk is always rotated while being positioned between the pair of pad plates.

When the driver presses the brake pedal during driving of the vehicle having the disc brake configured as described above, a braking hydraulic pressure is formed in the master cylinder (not shown) and is continuously transmitted into the cylinder to advance the piston.

As the piston moves forward, the inner pad attached to the inner pad plate is pressed onto one side of the rotating disk. In addition, since the braking hydraulic pressure remains in the cylinder, the caliper housing body moves in the opposite direction to the piston, whereby the outer pad attached to the outer pad plate is pressed against the other side of the disk and brakes.

However, in such a conventional disc brake, considerable vibration and noise are generated by the frictional force between the disc and the pad during the braking action, which has a problem of being transmitted to the outside through the wheel and the knuckle portion.

That is, the braking noise and vibration are transmitted to the vehicle body through the wheel and the knuckle portion on which the disk is fastened, and are continuously transmitted through the suspension or the like to grow as vehicle vibration or cause abnormal noise.

The present invention is to solve this problem, an object of the present invention is to improve the disk and carrier coupling portion to prevent the vibration and noise generated during the braking action to prevent the transmission to the vehicle body through the wheel and knuckle portion. It is to provide a disk brake assembly equipped.

1 is an exploded perspective view of a disc brake to which the present invention is applied.

FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1, showing a state where the disc brake assembly according to the present invention is mounted on the vehicle body.

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

10. Caliper housing 30. Carrier

32. Bolt connection 70. Disk

80. 1st dustproof member 90. 2nd dustproof member

A..wheel C, E.mounting bolt

D. Knuckle

The present invention for achieving this object is;

A pair of pad plates with pads attached to one surface, a pair of pad plates are slidably disposed at both ends, respectively, and coupled to a carrier fastened to the knuckle portion of the vehicle body, and a pair of pad plates disposed on the carrier. A disc brake assembly having a disc inserted into and rotated with a central portion of a wheel, the disc brake assembly comprising:

The carrier is provided with a bolted fastening part which is fastened through a mounting bolt to the knuckle part,

Between the bolted portion and the knuckle portion is characterized in that the first dust-proof member for preventing vibration and noise transmission.

In addition, the first anti-vibration member is characterized in that it comprises a metal plate with a through hole perforated so that the mounting bolt, and a dust-proof layer made of an elastic material coated on both sides of the metal plate.

In addition, the center of the disk is provided with a coupling portion coupled to the center of the wheel,

The second dustproof member is disposed between the coupling portion and the center of the wheel.

According to this configuration, the vibration and noise generated during the braking action of the disc brake assembly are prevented from being transmitted to the vehicle body side through the knuckle portion and the wheel, and at the same time reduced more efficiently.

Hereinafter, one preferred embodiment according to the present invention will be described in detail with reference to the accompanying drawings. Briefly, the accompanying drawings, Figure 1 is an exploded perspective view of a disk brake assembly to which the present invention is applied, Figure 2 is a side cross-sectional view showing a state in which the disk brake assembly according to the present invention is mounted.

Disc brake assembly to which the present invention is applied, as shown therein, a caliper housing (10) in which the piston (20) is built so as to move back and forth by braking hydraulic pressure, and a pair of pad plates (50) (60) are fixed. A portion of the outer circumference is inserted between the carrier 30 and the pair of pad plates 50 and 60, which are spaced apart from each other, and the wheels A and the pads are maintained at a constant distance from the pads 51 and 61 to be described later. And a disk 70 that rotates together.

The caliper housing 10 includes a cylinder 11 having a piston 20 therein and a finger portion 12 for operating the outer pad plate 60 described later. The cylinder 11 is processed in the rear portion of the caliper housing 10 so that the braking hydraulic pressure formed in the master cylinder (not shown) is transmitted, and an elastic seal 13 for restoring the piston 20 is installed on the inner circumferential surface thereof. do. The finger portion 12 is formed to bend downward in the front portion of the caliper housing 10 to surround the outer pad plate 60. In addition, both ends of the caliper housing 10 is slidably coupled to the carrier 30 through the guide rod 40.

The carrier 30 is firmly fixed to the knuckle portion D of the vehicle body through the mounting bolt E, and the pair of pad plates 50 and 60 to which the pads 51 and 61 are attached can move forward and backward. Is placed. At both ends of the carrier 30, guide grooves 31 for guiding the sliding motion of the pad plates 50 and 60 are formed in a direction perpendicular to the rotation direction of the disk 70.

The pair of pad plates 50 and 60 are disposed to be in contact with the tip of the piston 20, and are arranged to be in contact with the inner pad plate 50 having the inner pad 51 attached to the inner side and the inside of the finger part 12. And an outer pad plate 60 having an outer pad 61 attached to an inner surface thereof. Both ends of the inner pad plate 50 and the outer pad plate 60 are loosely coupled to the guide grooves 31 of the carrier 30, so that the inner pad plate 50 and the outer pad plate 60 are symmetrically mounted about the disk 70.

And the disk 70 is composed of a large disc shape, the coupling portion 71 is fastened to the central portion (B) of the wheel (A) through the mounting bolt (C), and extends in the radial direction from the coupling portion (71) It consists of a friction portion 72 is arranged a portion of the outer circumference between a pair of pad plates (50, 60). Therefore, the disk 70 is integrally moved when the wheel A is rotated.

As such, the carrier 30 is fastened to the knuckle portion D and the disk 70 is coupled to the wheel A so that the disc brake assembly is mounted on the vehicle body to perform a braking action. On the other hand, in order to prevent the vibration and noise generated during the braking action to the vehicle body side between the carrier 30 and the knuckle portion (D) and between the disk 70 and the wheel (A), the first and second anti-vibration members The detailed structure thereof is as follows.

First, the carrier 30 is fastened to the knuckle part D of the vehicle body through the mounting bolt E. To this end, bolt coupling parts 32 to which mounting bolts E are coupled to both lower ends of the carrier 30, respectively. Is formed. In addition, a first dustproof member 80 is disposed between the bolt coupling portion 32 of the carrier 30 and the knuckle portion D of the vehicle body to prevent the vibration and noise generated during the braking action from being transferred to the vehicle body side. It is.

The first dustproof member 80 includes a metal plate 81 having a through hole 83 perforated therethrough for mounting bolts E, and a dustproof layer 82 formed by coating an elastic material on both sides of the metal plate 81. It includes. At this time, it is preferable that the dustproof layer 82 is made of a rubber having elastic force on its own. The vibration and noise generated during the braking action by the first dustproof member 80 are prevented from being transmitted to the vehicle body through the carrier 30 and the knuckle portion D.

In addition, as described above, the disk 70 is coupled to the wheel A is coupled to the engaging portion 71 provided on the center, the second dust-proof member 90 having a predetermined thickness is also disposed on these coupling portions. . The second dustproof member 90 is also composed of a metal plate 91 made of a disc shape, and a dustproof layer 92 formed by coating on both sides thereof. Accordingly, the vibration and noise transmission through the disk 70 can be effectively prevented, which will be described in detail in the following description.

Next, the operation and effects of the first dustproof member and the second dustproof member according to the present invention configured as described above will be described.

First, the disk 70 rotates together with the wheel A while the vehicle on which the disk brake assembly is mounted travels. In this state, when the driver presses the brake pedal (not shown) and the braking hydraulic pressure is transmitted, the piston 20 moves forward in the cylinder 11.

Therefore, the inner pad plate 50, which is slidably installed on the carrier 30, moves forward and rotates inward to friction between one side surface of the friction part 72 of the disk 70 and the inner pad 51 to brake. . At the same time, the caliper housing 10, which is slidably coupled through the guide rod 40, moves in the opposite direction to the piston 20 operating direction by the hydraulic pressure remaining in the cylinder 11, whereby the finger portion 12 moves on the outer pad plate. Pushing the 60, the outer pad 61 is pressed against the other side of the friction portion 72 of the disk 70, thereby generating a braking force.

When the driver releases the brake pedal and the brake hydraulic pressure is released, the piston 20 is restored and the inner pad 51 and the outer pad 61 are separated from each other by rubbing against the disk 70 that is rotating. The plate 50 and the outer pad plate 60 are returned to their initial positions.

During this braking action, vibration and noise are generated by the frictional force between the pads 41 and 51 and the disk 70, which is transmitted to the vehicle body side by the first dustproof member 80 and the second dustproof member 90. It is prevented and reduced efficiently.

That is, a part of the vibration and noise generated during the braking action is transmitted to the carrier 30 in which the pair of pad plates 50 and 60 are installed. The bolt fastening portion 32 and the knuckle portion D of the carrier 30 are provided. It is no longer transmitted through the first dustproof member 80 disposed between the extinguished. That is, vibration and noise are efficiently reduced by the dustproof layer 82 of the first dustproof member 80.

In addition, some vibration is also transmitted to the disk 70 side, which is also removed by the second dustproof member 90 disposed between the engaging portion 71 of the disk 70 and the wheel A. That is, vibration and noise generated during the braking action by the dustproof layer 92 made of rubber are prevented from being transmitted to the vehicle body side through the wheel A and the knuckle portion D.

On the other hand, this technical idea has been described as forming the dustproof layer (82, 92) by coating the rubber on the metal plate (81, 91) of the first dustproof member 80 and the second dustproof member (90), It is a matter of course that the intended purpose of the present invention can be achieved without being limited to these simply by configuring a rubber plate.

As described in detail above, according to the disc brake assembly with the vibration isolator according to the present invention, the vibration and noise generated during the braking action is disposed between the disc and the wheel and the first dustproof member disposed between the carrier and the knuckle portion. It is effectively reduced while being prevented from being transmitted to the vehicle body side by the second dustproof member. Accordingly, abnormal noise is not generated during the braking action of the disc brake assembly, and there is an effect of improving the overall product reliability.

Claims (3)

A pair of pad plates with pads attached to one surface thereof, a pair of pad plates each slidably disposed inside both ends thereof, and a carrier fastened to a knuckle portion of a vehicle body, and the pair of pad plates disposed on the carrier In a disc brake assembly having a disc inserted between the outer circumference and fastened to the center of the wheel to rotate with it, The carrier 30 is provided with a bolt fastening portion 32 which is fastened to the knuckle portion D through a mounting bolt E, A disk brake assembly having a vibration isolator, characterized in that the first dustproof member (80) is disposed between the bolt fastening portion (32) and the knuckle portion (D) to prevent vibration and noise transmission. The method of claim 1, The first dustproof member 80, It characterized in that it comprises a metal plate 81 in which the through-hole 83 is perforated so that the mounting bolt (E) penetrates, and the dustproof layer 82 is formed on both sides of the metal plate 81 coated with an elastic material. A disc brake assembly with a dustproof device. The method of claim 1, The center portion of the disk 70 is provided with a coupling portion 71 is coupled to the center portion (B) of the wheel (A), A disc brake assembly having a vibration isolator, characterized in that the second dustproof member 90 is disposed between the coupling portion 71 and the center (B) of the wheel (A).