KR100502515B1 - Disc brake and Pad shim - Google Patents

Abstract

The present invention relates to a disc brake, and an object thereof is to improve a pad shim and effectively prevent noise caused by vibration and tremor of a pad plate without adding a separate component.

To this end, according to the disc brake according to the present invention, the fixing piece 81, the side elastic portion 83, the upper elastic portion 84, the lower elasticity to elastically support the pad plate (50, 60) to the pad shim 80 The part 85 is comprised integrally.

As a result, the fixing piece 81 is elastically supported while sliding the support surface 33 of the carrier 30 to cushion the vibration in the advancing direction of the inner / outer pad plates 50 and 60.

In addition, the protrusions 52 and 62 are elastically supported in the upper and lower directions in the guide grooves 32 by the upper elastic portion 84 and the lower elastic portion 85 to cushion the vertical shaking of the pad plates 50 and 60. The protrusions 52 and 62 in the guide groove 32 are elastically supported in the lateral direction through the side elastic part 83 to cushion the rotational direction of the disk 70 of the pad plates 50 and 60, and at the same time, The bending part 83a formed at the end portion of the side elastic part 83 provides elastic restoring force.

In addition, the overall fine vibration of the pad plate (50, 60) is attenuated by the adhesive applied to the inside of the pad shim (80).

As described above, the pad plates 50 and 60 may be formed by the side elastic part 83, the upper elastic part 84, and the lower elastic part 85 which are integrally formed on the pad shim 80 without adding a separate component. Noise due to vibration and tremor is suppressed and there is an effect that can reduce the number of materials and materials in the production thereof.

In addition, the side elastic portion 83` of the pad shim 80 extends to the end of the pad 51 and 61, and has a bending portion 83a` bent into the inner pad plate 50. When the pads 51 and 61 are worn over a certain period, the bending part 83a` generates noise by directly contacting the disk 70, thereby informing the driver of the replacement time of the pads 51 and 61. There is an effect that there is no need to install a wear detection device.

Description

Disc brake and pad shim

The present invention relates to a disc brake, and more particularly, to a disc brake capable of effectively preventing noise due to vibration and shaking of the pad plate by improving the pad shim.

In general, a brake mounted on a vehicle is a device for decelerating, stopping or maintaining a stopped state of a vehicle, and includes a drum brake and a disc brake. The disc brake obtains a braking force by pressing a disk-shaped disk that rotates together with a wheel instead of a drum with pads on both sides, and its structure is as follows.

Conventional disc brakes are installed on both sides of a caliper housing in which a piston is built to move back and forth by braking hydraulic pressure, a carrier fixed to the vehicle body, and both ends of the caliper housing slidably mounted through a guide rod, and on both sides of a disk rotating with wheels. It is provided with a pair of pad plate attached to the pad.

The caliper housing has a cylinder in which a piston is installed and a finger portion, so that a pair of pad plates are pushed to the disk side during braking action.

In addition, the two pad plates are slidably mounted to the carrier and are distinguished by an inner pad plate facing the piston and an outer pad plate facing the finger portion. In addition, in order to install the pad plate on the carrier, both sides of the carrier are formed with guide grooves for supporting the two pad plates to advance and retreat, and protruding jaws that are received by the guide grooves are provided at both ends of the two pad plates. In addition, a plate-shaped pad spring for guiding and restoring the sliding movement of the pad plate is installed between both ends of the pad plate and the guide groove of the carrier supporting it.

In addition, pad pads are respectively provided to cover outer surfaces of the inner pad plate and the outer pad plate, and the pad cores are made of a metal plate having a predetermined thickness to prevent braking frictional heat and friction vibrations from being transferred to the caliper housing side.

Therefore, when the driver presses the brake pedal and the braking hydraulic pressure generated from the master cylinder is transmitted to the cylinder, the inner pad plate moves forward with the piston, and the pad thereof is momentarily compressed on one side of the rotating disk. In addition, the caliper housing is moved in the opposite direction to the piston by the hydraulic pressure remaining in the cylinder, the finger portion pushes the outer pad plate, the pad attached thereto is pressed on the other side of the disk to exert a braking force. Most of the frictional heat generated during this braking action is dissipated into the atmosphere and is prevented from being transferred directly to the caliper housing by the pad shim.

However, in the conventional disc brake, a pair of pad springs are installed in the guide groove of the carrier to perform sliding and restoring of the pad plate. Since the pad springs are provided separately on both sides of the carrier, the damping action is performed. And act independently of one another.

Therefore, the pad spring does not sufficiently attenuate the vibration, which makes it difficult to effectively suppress the noise caused by the vibration and the shaking phenomenon.

 In addition, since the pad spring must be manufactured and installed separately, the manufacturing process is complicated and the manufacturing cost increases.

The present invention is to solve this problem, an object of the present invention is to improve the pad core by elastically supporting the pad plate slidably mounted to the carrier, the vibration and vibration of the pad plate effectively without adding a separate component It is to provide a disc brake that can prevent the noise caused by.

The present invention for achieving this object is;

An inner pad plate and an outer pad plate having pads attached to inner surfaces thereof and protrusions provided at both ends thereof, and guide grooves provided at both ends so that the protrusions are slidably disposed, and the inner pad plates and outer pad plates are substantially in contact with each other. In the disk brake for a vehicle having a surface formed, a pad shim provided on the outer surface of the inner outer pad plate for vibration damping,

A fixing piece which is bent from the end of the pad shim and provided below the protruding portion to fix the pad shim to the inner and outer pad plates;

A side elastic portion bent from an end of the pad shim and provided on a side surface of the protrusion;

It is characterized in that the upper elastic portion and the lower elastic portion which is bent from the end of the pad core or the end of the side elastic portion is provided on the upper and lower portions, respectively.

In addition, the fixing piece is characterized in that it is in contact with the support surface to elastically support the inner outer pad plate.

In addition, the lower elastic portion is elastically deformed so that one side is bent away from the protrusion a predetermined distance so as to support the protrusion upward.

In addition, the side elastic portion is characterized in that the end is extended to a predetermined distance is bent into the inner outer pad plate.

In addition, the pad core is formed of a plate-like metal material having an elastic force, characterized in that the pressure-sensitive adhesive having a viscoelasticity is coated inside the metal material.

In addition, the side elastic portion is characterized in that the end is extended to the portion where the pad is located so as to sense the pad replacement time is bent into the inner outer pad plate.

In addition, the present invention for achieving this object;

In the brake pad shim used for the disc brake and attached to the outer surface for the vibration damping of the pad plate is attached to the inner surface and provided with projections on both ends,

A fixing piece for bending and extending from an end of the pad shim and provided below the protruding portion to fix the pad shim to the pad plate;

A side elastic portion bent from an end of the pad shim and provided on a side surface of the protrusion;

It is characterized in that the upper elastic portion and the lower elastic portion which is bent from the end of the pad core or the end of the side elastic portion is provided on the upper and lower portions, respectively.

In addition, the lower elastic portion is elastically deformed so that one side is bent away from the protrusion a predetermined distance so as to support the protrusion upward.

In addition, the side elastic portion is characterized in that the end is extended to a predetermined distance is bent into the pad plate.

In addition, the pad core is formed of a plate-like metal material having an elastic force, characterized in that the pressure-sensitive adhesive having a viscoelasticity is coated inside the metal material.

In addition, the side elastic portion is characterized in that the end is extended to the portion where the pad is located so as to sense the pad replacement time is bent into the pad plate.

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

1 and 2, a disc brake according to the present invention includes a caliper housing 10 which moves forward and backward by braking hydraulic pressure, and a pair of pad plates 50 and 60 to which pads 51 and 61 are respectively attached. A carrier 30 is installed at a predetermined interval, and a portion of the edge is inserted between the pair of pad plates 50 and 60 to perform a braking function of the disk 70 rotating together with a wheel (not shown). .

The caliper housing 10 includes a cylinder 11 on which a piston 20 is installed, a finger portion 12 for operating an outer pad plate 60 to be described later, and a finger portion 12 and a cylinder 11. It is defined as a bridge portion 13 for connecting. The cylinder 11 is provided at one side of the caliper housing 10 so that the braking hydraulic pressure generated in the hydraulic source such as the master cylinder is transmitted. The finger portion 12 is formed to be bent downward from the other side of the caliper housing 10 so as to surround the outer pad plate 60. The caliper housing 10 is slidably fastened to the carrier 30. For this purpose, fastening portions 14 having fastening holes 15 formed at both left and right ends thereof are symmetrically provided.

The carrier 30 is firmly mounted to a knuckle (not shown) of the vehicle body through mounting bolts (not shown), and caliper housings 10 are slidably coupled to both ends thereof through a guide rod 40. That is, the guide holes 31 are formed at predetermined depths at both ends of the carrier 30 so that the ends of the guide rods 40 are loosely fitted at the positions corresponding to the fastening portions 14. Therefore, when one end of the guide rod 40 is fixed to the fastening portion 14 with the bolt 16 and the other end thereof is inserted into the guide hole 31, the caliper housing 10 is assembled to the carrier 30 to be slidable. .

In addition, the pair of pad plates 50 and 60 have an inner pad plate 50 attached to the inner surface of the pad plate 50 and 60 and the outer surface of the pair of pad plates 50 and 60 and the pad 61 attached to the inner surface. The outer surface is distinguished by an outer pad plate 60 disposed to contact the finger portion 12.

As shown in FIG. 2, in order to install such inner and outer pad plates 50 and 60, horizontally recessed guide grooves 32 are correspondingly provided at both ends of the carrier 30. Protrusions 52 and 62 are provided at both ends of the inner and outer pad plates 50 and 60 so as to be inserted into the guide grooves 32 in a relaxed manner. Therefore, when the protrusions 52 and 62 are inserted into the guide grooves 32, the inner and outer pad plates 50 and 60 are slidably assembled to the carrier 30, respectively.

On the other hand, braking frictional heat is prevented from being transmitted to the caliper housing 10 on the outer surface of the inner pad plate 50 in contact with the piston 20 and the outer surface of the outer pad plate 60 in contact with the finger portion 12, respectively. At the same time, the pad shim (80, Pad shim) for preventing the shaking phenomenon is mounted, the pad shim 80 according to the present invention with reference to Figures 2 to 5 in more detail as follows. Since the pad shim 80 according to the present invention mounted on the inner pad plate 50 and the outer pad plate 60 has the same shape, the pad shim 80 mounted on the inner pad plate 50 will be described below. Explain.)

As shown in Figures 2 to 4, the pad shim 80 has a predetermined thickness to prevent the front end of the piston 20 is in direct contact with the inner pad plate 50, and is made of a metal plate such as stainless steel and the inside As the adhesive is applied and fixed to the inner pad plate 50, the fixing piece 81 is formed on the pad shim 80 to further solidify the fixing. The fixing piece 81 extends and bends at the edge of the pad shim and is provided below the inner pad plate 50 protruding portion, and has its own elastic force. Accordingly, when the fixing piece 81 is coupled to the inner pad plate 50 while elastically deforming, the pad shim 80 is firmly mounted to surround the outer side of the inner pad plate 50.

In addition, the fixing piece 81 is substantially in contact with the support surface 33 of the carrier 30, and the vibration and shaking between the support surface 33 of the carrier 30 by its own elastic force. The material is made of stainless steel, such as pad pad 80, so that the inner pad plate 50 is smoothly retracted.

In addition, at both ends of the pad shim 80, an elastic portion 82 for elastically supporting each of the protrusions 52 inserted into the guide groove 32 is integrally formed to surround the protrusions 52. 82 is to prevent the shaking of the inner pad plate 50 disposed on the carrier 30, the side elastic portion 83 is bent from the end of the pad shim 80 and provided on the side surface of the protrusion 52 ), An upper elastic portion 84 that is bent from the end of the pad shim 80 and is provided on the upper portion of the protrusion 52, and is bent and extended from an end of the side elastic portion 83 to the lower portion of the protrusion 52. It includes a lower elastic portion 85 is provided.

The side elastic portion 83 is bent at the end of the pad core 80 is provided on the side of the protrusion 52, through which the side elastic portion 83 and the pad core 80 is integrally formed. In addition, the upper elastic portion 84 and the lower elastic portion 85 is also configured to be integral with the pad shim (80). In addition, the side elastic portion 83 has an end portion formed to extend a predetermined distance to have a bending portion 83a formed to be bent into the inner pad plate 50, and the bending portion 83a is formed on the side surface of the protrusion 52. It provides an elastic restoring force upon contact with the inner surface of the guide groove 32 correspondingly contacted.

The lower elastic portion 85 is bent again extending from the side elastic portion 83 is provided on the lower portion of the protrusion 52, one side is spaced apart from the protrusion 52 to support the protrusion 52 while being elastically deformed. Bending is formed.

That is, the lower elastic portion 85 extends downwardly from the side elastic portion 83 below the protrusion 52 and then bent toward the protrusion 52 to contact the protrusion 52 and away from the protrusion 52 again. Bend. Accordingly, the lower elastic portion 85 supports the inner pad plate 50 with considerable elastic force.

Since the protrusions 52 and 62 of the inner and outer pad plates 50 and 60 are elastically supported by the elastic portion 82 provided integrally with the pad shim 80, their vibrations and vibrations during braking action and release are achieved. Phenomenon is prevented and noise is suppressed accordingly.

On the other hand, referring to Figure 5 as another embodiment of the pad shim 80, the side elastic portion 83` of the pad shim 80 is formed to extend to the end of the pad 51, 61, the inner and outer It has a bending portion (83a`) formed bent into the pad plate (50, 60), this bending portion (83a`) is in direct contact with the disk 70 when the pad (51, 61) is worn over a certain amount of noise This causes the driver to inform the driver of the replacement time of the pads 51 and 61.

Next, the operation of the disc brake according to the present invention configured as described above and the effects thereof will be described.

First, when the driver presses a brake pedal (not shown) while the vehicle is running, a braking hydraulic pressure is formed in the master cylinder (not shown), which is transmitted to the cylinder 11 to advance the piston 20.

Accordingly, the braking force is generated by friction of the pad 51 on the side of the disk 70 that rotates while the inner pad plate 50 installed on the carrier 30 moves forward. In addition, the caliper housing 10 moves in the opposite direction to the piston 20 due to the hydraulic pressure remaining in the cylinder 11, whereby the finger part 12 pulls the outer pad plate 60 and the pad 61 thereof. A pressing braking force is generated on the side of the disk 70.

In this braking operation, heat generated by friction between the pads 51 and 61 and the disk 70 is prevented from being transferred to the piston 20 and the finger portion 12 by the pad shim 80. That is, the braking frictional heat is not transmitted to the caliper housing 10 side by the pad shim 80 and most of the heat is dissipated to the atmosphere.

When the brake hydraulic pressure is released by the driver by releasing the brake pedal, the pads 51 and 61 are separated from each other by friction with the disk 70 that rotates together with the wheel, and the piston 20 is also restored to the cylinder 11.

At this time, since each pad plate (50, 60) is supported through the fixing piece 81 and the elastic portion (82) integrally provided in the pad shim (80), due to the vibration and vibration during braking action and release Noise is suppressed.

That is, the fixing piece 81 of the inner and outer pad plates 50 and 60 is elastically supported while sliding the carrier surface 30 support surface 33, thereby vibrating in the advancing direction of the inner and outer pad plates 50 and 60. Will be buffered.

In addition, the upper elastic portion 84 and the lower elastic portion 85 formed with one side bent may allow the protrusions 52 and 62 of the inner and outer pad plates 50 and 60 to elastically support in the guide groove 32 in the vertical direction. As a result, vibrations of the inner and outer pad plates 50 and 60 in the vertical direction are buffered.

In addition, the side elastic parts 83 buffer the vibrations in the rotational direction of the disk 70 of the inner / outer pad plates 50 and 60 by allowing the protrusions 52 and 62 to be elastically supported laterally in the guide grooves 32. do.

As such, since the fixing piece 81, the upper elastic portion 84, the lower elastic portion 85, and the side elastic portion 83 are integrally connected to both sides of the pad shim 80 end (that is, the components Structures connected in parallel) Each of the components disposed on both ends of the pad shim 80 may simultaneously play an elastic support role.

In addition, the overall fine vibration of the inner and outer pad plates 50 and 60 is attenuated by the adhesive applied to the inside of the pad shim 80.

  As a result, vibration and shaking of the respective pad plates 50 and 60 are prevented during the braking action and release, thereby significantly reducing the noise of the disc brake.

In addition, the side elastic portion 83` is formed when the end thereof extends to a portion where the pads 51 and 61 are positioned to have a bending portion 83a` which is bent into the inner / outer pad plates 50 and 60. In addition to the role of elastic support in the direction, when the pads 51 and 61 are worn for a predetermined time or more, they directly contact the disk 70 to generate noise, thereby informing the driver of the time of replacing the pads 51 and 61.

As described in detail above, according to the disc brake according to the present invention, a fixing piece, a side elastic portion, an upper elastic portion, and a lower elastic portion, which elastically support the pad plate on the pad core, are integrally formed.

Therefore, the simple and compact structure has the effect of being able to effectively perform the elastic support and vibration damping of the pad plate.

In other words, the fixing piece cushions the vibration in the pad plate traveling direction, and the lower elastic part and the upper elastic part absorb the up and down vibration, and the side elastic part can effectively perform the vibration attenuation in the disk rotation direction. Therefore, there is an effect of being able to suppress the noise generated by the vibration and vibration phenomenon.

In addition, it is possible to detect the pad replacement time by measuring the wear level of the pad through the side elastic portion, there is an effect that does not need to install a separate pad wear detection device.

1 is a plan cross-sectional view of a disc brake according to the present invention.

2 is an exploded perspective view showing a disk brake according to the present invention.

3 is a perspective view showing an extract of the pad shim and the pad plate according to the present invention.

Figure 4 is a perspective view showing a part of the mounting state of the pad shim according to the present invention.

5 is a perspective view showing a part of the pad shim mounting state of another embodiment according to the present invention.

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

10: caliper housing, 20: piston,

30: carrier, 32: guide groove,

33: support surface, 50, 60: pad plate,

52, 62: protrusion, 80: pad shim,

82: elastic portion, 83: side elastic portion,

83a: bending portion, 84: upper elastic portion,

85: lower elastic part.

Claims (11)

An inner pad plate and an outer pad plate having pads attached to inner surfaces thereof and protrusions provided at both ends thereof, and guide grooves provided at both ends so that the protrusions are slidably disposed, and the inner pad plates and outer pad plates are substantially in contact with each other. In the disk brake for a vehicle having a surface formed, a pad shim provided on the outer surface of the inner outer pad plate for vibration damping, A fixing piece which is bent from the end of the pad shim and provided below the protruding portion to fix the pad shim to the inner and outer pad plates; A side elastic portion bent from an end of the pad shim and provided on a side surface of the protrusion; An upper elastic part and a lower elastic part which are bent from the end of the pad shim or the end of the side elastic part and are respectively provided on the upper and lower parts of the protrusion, The side elastic portion is a vehicle disk brake, characterized in that the end is extended to a predetermined distance is bent into the inner outer pad plate. The method of claim 1, And the fixing piece is brought into contact with the support surface to elastically support the inner and outer pad plates. The method of claim 1, The lower elastic portion is elastically deformed, the disc brake for a vehicle, characterized in that one side is bent away from the protrusion a predetermined distance so as to support the protrusion upward. delete The method of claim 1, The pad shim is formed of a plate-like metal material having elasticity, and a viscoelastic adhesive is applied to the inside of the metal material. The method of claim 1, The side elastic portion is a vehicle disc brake, characterized in that the end is extended to the portion where the pad is located so as to sense the pad replacement timing is bent into the inner outer pad plate. In the brake pad shim used for the disc brake and attached to the outer surface for the vibration damping of the pad plate is attached to the inner surface and provided with projections on both ends, A fixing piece for bending and extending from an end of the pad shim and provided below the protruding portion to fix the pad shim to the pad plate; A side elastic portion bent from an end of the pad shim and provided on a side surface of the protrusion; An upper elastic part and a lower elastic part which are bent from the end of the pad shim or the end of the side elastic part and are respectively provided on the upper and lower parts of the protrusion, The side elastic portion is a brake pad shim, characterized in that the end is extended to a predetermined distance is bent into the pad plate. The method of claim 7, wherein The lower elastic part is elastically deformed, the brake pad shim, characterized in that one side is bent a predetermined distance from the protrusion so as to support the protrusion upward. delete The method of claim 7, wherein The pad shim is formed of a plate-like metal material having elastic force, and a brake pad shim is coated with a viscoelastic adhesive inside the metal material. The method of claim 7, wherein The side elastic part is a brake pad shim, characterized in that the end is extended to the portion where the pad is located so as to sense the pad replacement time is bent into the pad plate.