KR100451534B1 - Pad sliding guider of disc brake - Google Patents

Abstract

The present invention relates to a pad restraint device of a disc brake, the object of which is to facilitate the installation of the pad restraint device while at the same time detecting and alerting the wear of the pad.

According to the disc brake pad device 80 of the present invention, the box-shaped body 81 made of a metal material, which is inserted and coupled to surround the guide portions 52 and 62, forms a body 81. The wear detection end 82 extends from the side surface 81a to the disk 70 side. Accordingly, the pad while the inner device 80 is more easily and robustly installed through the box-shaped body 81, and the body 81 of the inner device 80 is the guide groove of the carrier 30. Since the slide along the friction 32, the movement of the pad plate 50, 60 is made easier. In addition, when the pads 51 and 61 are worn over a predetermined depth, the disk 70 and the wear detecting end 82 generate frictional metal sounds, so that the pad replacement timing can be easily known.

Description

Pad sliding guider of disc brake

The present invention relates to a disc brake, and more particularly to a pad brake internal device for smoothly moving a pad plate slidably mounted to a carrier.

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 built-in piston so 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, and a portion of the outer circumference is inserted between the pad plates. And a disk for rotating movement together.

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 bolted to the knuckle of the vehicle body, where a pair of pad plates with pads 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.

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 move the piston forward.

As the piston moves forward, the inner pad attached to the inner pad plate is momentarily pressed onto one side of the disk. In addition, since the braking hydraulic pressure remains in the cylinder, the caliper housing itself 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.

In the conventional disc brake, the inner pad plate and the outer pad plate slide to the disc side at both ends of the carrier, and a braking action is performed. A metal plate-shaped pad spring is installed at the end of the carrier so as to smoothly move the pad plate. .

However, since the conventional pad spring is widely installed to an area unnecessary for the movement of the pad plate, the material is wasted, and it takes a considerable installation space even during the assembly process, which is disadvantageous in design.

In addition, when the braking action of the disc brake is repeated, the pad continues to wear due to friction with the disc and the braking performance is lowered. Therefore, conventionally, as shown in FIG. 1, the wear detection member 3 for informing the driver of a pad replacement time is provided in the pad plate 1. That is, the wear detecting member 3 is made of a metal plate, one end of which is fixed to the outside of the pad plate 1 through the riveting means 3a, and the other end is bent to face the pad 2. At this time, the other end of the wear sensing member 3 is assembled so as to maintain a constant distance from the disk 4 in the initial state. In the disc brake having the wear sensing member 3, the other end of the wear sensing member 3 directly rubs with the disk 4 to generate metal noise during braking when the pad 2 is worn over a predetermined depth. This friction metal sound allows the driver to know when to replace the pad 2.

However, the conventional pad wear detection member 3 is fixed to the pad plate 1 through the riveting means 3a, thereby making the installation work difficult and integral with the pad plate 1 when the pad 4 is replaced. There is a disadvantage in that it acts as a cause of resource waste.

The present invention is to solve this problem, the object of the present invention is to improve the device for guiding the movement of the pad plate to install it more easily and firmly, the disc brake to facilitate the sliding of the pad plate The pad is to provide the device during.

And another object of the present invention is to provide a pad intermediary device of a disc brake that makes it easy to know when to replace it when the pad is worn over a predetermined depth.

1 is a schematic view showing a conventional pad wear detection member.

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

Figure 3 is an exploded perspective view showing the installation structure of the inner pad device according to the present invention.

Figure 4 is a cross-sectional view taken along the line IV-IV of Figure 4, showing the installation state of the pad inner ear device according to the present invention.

Figure 5 is a cross-sectional view taken along the line V-V of Figure 3, showing the operating state of the pad during the internal device according to the present invention.

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

10. Caliper housing 30. Carrier 32. Guide groove

50, 60 Pad plate 51, 61 Pad 52, 62 Guide part

70. Disk 80. Pad while the device 81. Body

82 .. wear detection 83 ..

The present invention for achieving this object is;

A pair of pad plates fixed to the vehicle body and having guide grooves formed at both ends in the transverse direction, and guide parts protrudingly formed at both ends to be coupled to the guide grooves so as to be slidable in the transverse direction, and having pads attached to one surface thereof In the disk brake with a part of the outer periphery is inserted between the pad plate to rotate with the wheel, and the pad interlocking device for guiding the movement of the pad plate,

The inner device of the pad is a box-shaped body made of a metal material that is inserted and coupled to surround the guide portion, and a wear detection end that extends from one side of the body to rub the disk when the pad is worn over a predetermined depth. It is a structure characterized by including.

In addition, the guide portion is provided with a recessed recessed groove,

The other side constituting the body is characterized in that the fixing piece is formed is formed by cutting a portion to be elastically deformed and coupled to the fixing groove.

In addition, the ceiling surface constituting the body is provided with an elastic support end bent to elastically contact the upper surface of the guide groove is a configuration characterized in that the bottom surface constituting the body slides while always in contact with the lower surface of the guide groove.

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

As shown in FIG. 2, the disc brake according to the present invention has a caliper housing 10 in which a piston 20 is embedded and a pair of pad plates 50 and 60 are spaced at a predetermined interval so as to move forward and backward by braking hydraulic pressure. Some of the outer periphery is inserted between the pad plate 50, 60, and the carrier 30 is installed so as to rotate together with the wheel (not shown) while maintaining a constant interval with the pad 51, 61 to be described later Disc 70 is included.

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, the caliper housing 10 is slidably coupled 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 fixed to the knuckle (not shown) of the vehicle body through a bolt, and a pair of pad plates 50 and 60 to which the pads 51 and 61 are attached is arranged to move forward and backward. The caliper housing 10 is slidably coupled to the carrier 30 through a guide rod 40 extending in a rod shape. For this purpose, fastening holes 15 of the caliper housing 10 are formed at both ends of the carrier 30. Sliding hole 31 is formed to correspond to. Therefore, after inserting the lower end of the guide rod 40 into the sliding hole 31 and tightening the bolt 16 by matching the upper end of the guide rod 40 with the fastening hole 15, the guide rod 40 is firmly fixed and at the same time The caliper housing 10 is slidably assembled to the carrier 30. In addition, guide grooves 32 for guiding the sliding motion of the pad plates 50 and 60 are formed at both ends of the carrier 30 in a direction perpendicular to the rotational direction of the disk 70.

In addition, 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 to which the inner pad 51 is attached and the inner side of the finger part 12. And an outer pad plate 60 to which the outer pad 61 is attached.

The inner pad plate 50 and the outer pad plate 60 are provided at both ends with guide parts 52 and 62 protruding to have a predetermined width in the longitudinal direction, and are installed symmetrically in the carrier 30. That is, the pair of pad plates 50 and 60 are coupled to the guide grooves 32 formed at both ends of the guide parts 52 and 62 on both sides of the pair of pad plates 50 and 60, respectively, so that the center of the disk 70 is centered. It is mounted symmetrically and slidably.

In addition, the guide portions 52 and 62 inserted into the guide grooves 32 make sliding of the pad plates 50 and 60 easier, and when the pads 51 and 61 are over-weared, The inner device 80 is installed while the pad can inform the driver.

3 to 5, the pad holder inner device 80 is detachably coupled to the guide parts 52 and 62 to facilitate sliding of the pad plates 50 and 60. In other words, it includes a body 81 provided in a box shape, and the wear detection end 82 extending from the body 81 to the disk 70 side.

The body 80 is formed of a metal plate and is folded in a box shape in which the front is opened to be fitted to completely cover the guide parts 52 and 62. And the wear detection end 82 is configured to extend from the one side surface 81a constituting the body 81 to the disk 70 side, when the pad 51, 61 is worn over a predetermined depth, the front end of the disk 70 Rub directly with) to generate metal sound.

In addition, the box-shaped body 81 and the fixing piece 83 to be maintained in a state coupled to the guide portion (52) (62). An elastic support end 81c is provided which can reduce the operation noise by its own elastic force while making the sliding motion of the pad plates 50 and 60 easier.

The fixing piece 83 is for preventing the body 81 from being separated without applying an artificial force in a state where the body 81 is fitted to the guide parts 52 and 62, and a part of the other side 81b constituting the body 81 is partially removed. It is bent and is bent inward to have its own elastic restoring force. Concave recessed fixing grooves 53 and 63 are provided on the side surfaces of the fixing piece 83 and the corresponding guide portions 52 and 62. Therefore, when the box-shaped body 81 is forcibly inserted into the guide portions 52 and 62, the fixing piece 83 is gradually coupled to the outside while being seated in the fixing grooves 53 and 63 and restored at the same time. do. As a result, the body 81 is easily and firmly mounted while the fixing piece 83 is elastically deformed, thereby preventing the body 81 from being separated from the guide portions 52 and 62 without applying an artificial force. .

And the elastic support end (81c) is provided on the ceiling surface constituting the body 81, when the guide portion 52, 62 is inserted into the guide groove 32, and the upper surface (32a) of the guide groove 32 The bending is configured to elastically contact. Accordingly, the bottom surface 81d constituting the body 81 slides integrally with the guide portions 52 and 62 while always being in surface contact with the bottom surface 32b of the guide groove 32.

Since such a pad inner device 80 is configured to surround only the sliding guide portion 52, 62 of the pad plate 50, 60, it can facilitate the manufacture and assembly thereof, the fixing piece It is firmly assembled through 83 to prevent departure during operation.

Next, the operation of the pad internal device 80 and its effects will be described.

First, when the pad plates 50 and 60 on which the inner device 80 is mounted are mounted on the carrier 30, as shown in FIG. 4, the elastic support end 81c of the body 81 is guided. It presses by contact with the upper surface 32a of the groove 32, and thereby the bottom surface 81d of the body 81 makes surface contact with the lower surface 32b of the guide groove 32. As shown in FIG. At this time, the wear detection end 82 extending from one side 81a of the body 81 is disposed to face the disk 70 side.

In this way, when the driver presses on a brake pedal (not shown) to the disc brake provided with the internal device 80 during the pad, 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 and the inner pad 51 frictions with one side of the disk 70. 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, thereby forming a finger portion formed to bend downward. 12 pushes the outer pad plate 60, which causes the outer pad 61 to be pressed onto the other side of the disk 70 to generate 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.

In this braking operation, the movement of the pad plates 50 and 60 is made easier along the guide grooves 32. The carriers 30 and the guide portions 32 of the pad plates 50 and 60 are molded products. This is because direct friction with the body is prevented, while the bottom 81d of the flat metal plate body slides while rubbing against the lower surface 32b of the guide groove 32. Further, the body of the internal device 80 is provided with a pad. Since the 81 is elastically disposed inside the guide groove 32 by the elastic support end 81c, a kind of rattle noise which is noisy during braking action is not generated.

In addition, when the pads 51 and 61 wear more than a predetermined depth due to prolonged use of the brake, as shown in FIG. 5, the wear detection end 82 provided to extend from the body 81 to the disk 70 side is provided. You can find out when to replace the pad. That is, when the pads 51 and 61 are braked with excessive wear, the movement width of the pad plates 50 and 60 increases, whereby the end of the wear detection end 82 rotates the disk 70. The metal sound is generated by friction with the driver, and the driver hears it to know when to replace the pad plates 50 and 60 to which the pads 51 and 61 are attached.

In addition, since the pad internal device 80 is detachably attached to the guide portions 52 and 62 of the pad plates 50 and 60 via the fixing piece 83, the pad plate 50 ( In the exchange of 60, it can be separated and reused, and can also be shared between the inner and outer pad plates 50 and 60 and other vehicles without distinction.

As described above in detail, the pad of the disc brake according to the present invention according to the present invention, a box-shaped body made of a metal material that is inserted and coupled to surround the guide portion, and the wear detection end extending from the side of the body to the disk side Equipped. As a result, during the pad, the inner device is easily and reliably installed through the box-shaped body, and the pad plate is more easily moved because the body of the inner device slides while rubbing along the guide groove of the carrier. . In addition, when the pad is worn over a predetermined depth, the disk and the wear sensing end generate friction metal sounds, so that the pad replacement timing can be easily known.

Claims (3)

A pair of pad plates fixed to the vehicle body and having guide grooves formed at both ends in the transverse direction, and guide parts protrudingly formed at both ends to be coupled to the guide grooves so as to be slidable in the transverse direction, and having pads attached to one surface thereof. In the disk brake having a portion of the outer periphery is inserted between the pad plate and rotates with the wheel, and the pad interlocking device for guiding the movement of the pad plate, The pad 80 during the pad, A box-shaped body 81 made of a metal material that is inserted and coupled to surround the guide parts 52 and 62; The wear detection end 82 extends from one side surface 81a constituting the body 81 to friction with the disk 70 to generate metal sounds when the pads 51 and 61 are worn over a predetermined depth. The pad brake of the disc brake device characterized in that it is provided. The method of claim 1, The guide parts 52 and 62 are provided with concave recessed grooves 53 and 63. Pad movement of the disc brake, characterized in that the other side 81b constituting the body 81 is provided with a fixing piece 83 formed by cutting a part of the body 81 to be elastically deformed and coupled to the fixing grooves 53 and 63. Guide device. The method of claim 1, The ceiling surface constituting the body 81 is provided with an elastic support end (81c) bent to elastically contact the upper surface (32a) of the guide groove 32, the bottom surface 81d constituting the body 81 is The pad brake of the disc brake is characterized in that the sliding surface is always in contact with the lower surface (32b) of the guide groove (32).