KR200186746Y1 - Guide rod combination structure of disc brake - Google Patents

Abstract

The present invention relates to a guide rod coupling structure of a disc brake, the purpose of which is to prevent the departure of lubricant filled in the pinhole and at the same time effectively prevent the generation of rattle noise.

According to the guide rod coupling structure of the disc brake according to the present invention, the mounting groove 31a provided in the circumferential direction in the inner circumference of the pin hole 31, and made of an elastic material so that the other end of the guide rod 40 can be penetrated with ease. By having a ring-shaped buffer member 32 fitted and seated in the seating groove 31a, the detachment of the lubricant 80 filled in the pinhole 31a is prevented even in a repeated braking action. In addition, the direct shock between the guide rod 40 and the carrier 30 is prevented by the shock absorbing member 32, thereby reducing the shock transmitted from the outside and at the same time effectively prevent the generation of rattle noise to improve the reliability of the overall disc brake. There is an advantage to this.

Description

Guide rod combination structure of disc brake

The present invention relates to a disc brake, and more particularly, to a guide rod coupling structure of the disc brake for slidably coupling the caliper housing in which the piston is built into the carrier fixed to the vehicle body.

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 hydraulic brake and a disk hydraulic brake. Disc brake is to obtain a braking force by pressing the disk-like disk that rotates with the wheel instead of the drum with a pad on both sides, the structure is as follows.

Conventional disc brake has a caliper housing with a built-in piston to move back and forth by braking hydraulic pressure, a pair of pad plates are installed, the carrier is fixed to the vehicle body, a part of the outer periphery is inserted between the pad plate and the disk to rotate with the wheel Equipped.

The rear part of the caliper housing is machined with a cylinder for transmitting the braking hydraulic pressure, and the front part thereof is integrally provided with a finger portion which is bent downward to surround the outer pad plate, which will be described later. Close contact In addition, both end portions of the caliper housing is provided to protrude a fastening hole having a fastening hole for engaging with the carrier.

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 divided into an inner pad plate disposed to be in direct contact with the front end of the piston and an outer pad plate disposed to be in contact with the inner surface of the finger portion.

The caliper housing is slidably coupled to the carrier fixed to the vehicle body in the same direction as the forward and backward direction of the piston through the guide rod, and the coupling structure thereof is as follows.

Referring to FIG. 1, both ends of the caliper housing 1 are provided with a fastening part 1a in which the fastening hole 1b is drilled as described above, and is also provided at both ends of the carrier 2 so as to face the fastening hole 1b. Again, pinholes 2a of predetermined depths are formed, respectively.

After inserting the lower end of the guide rod 3 into the fastening groove 2a, the upper end of the guide rod 3 is fixed to the fastening hole 1b with the bolt 1c. At this time, since the guide rod is loosely fitted into the pinhole so as to be slidable, a predetermined clearance is formed between them.

On the other hand, the lubricant 4 is filled in the pinhole 2a in order to prevent friction damage and impact noise of the guide rod 3 due to the repeated braking action.

However, such a conventional disc brake has a problem in that the lubricant 4 is frequently injected due to the lubricating effect of the lubricant 4 coming out of the pinhole 2a due to the repeated braking action.

In addition, as the lubricant 4 exits, a kind of rattle noise is generated in the pinhole 2a that is caused by direct frictional shock between the guide rod 3 and the carrier 2 of the metal material in the braking action. In particular, this phenomenon occurs more severely when the vehicle is traveling on a vibration or uneven road, which is a factor that lowers the reliability of the disc brake.

The present invention is to solve this problem, an object of the present invention is to improve the coupling structure of the guide rod for slidingly coupling the caliper housing to the carrier to prevent the departure of the lubricant and at the same time to prevent the generation of rattle noise It is to provide a guide rod coupling structure of the disc brake.

1 is a schematic view showing a coupling structure of a carrier and a caliper housing of a conventional disc brake.

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

3 is an enlarged cross-sectional view showing an extract of the coupling structure of the guide rod according to the present invention.

Figure 4 is an exploded cross-sectional view showing an extract of the coupling structure of the guide rod according to the present invention.

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

10. Caliper housing 20. Piston

30. Carrier 31. Pinhole

31a.Sitting groove 32.Buffer member

40..Guide rod 80..Lubricant

The present invention for achieving this purpose, the caliper housing with a piston built to move forward and backward by hydraulic, a pair of pad plates are installed to move forward and backward by the piston, the carrier is fixed to the vehicle body, to enable the caliper housing to slide In the disc brake having a guide rod which is fixed to the end of the caliper housing and the other end is loosely fitted into the pinhole formed to a predetermined depth at the end of the carrier to be engaged,

It is a configuration characterized in that it comprises a ring-shaped buffer member made of a seating groove, an elastic material concave in the circumferential direction of the pin hole in the circumferential direction and fitted into the seating groove to allow the other end of the guide rod to pass through.

According to this configuration, it is possible to prevent the separation of the lubricant filled in the pinhole and at the same time to prevent direct friction between the guide rod and the carrier to reduce the generation of rattle noise.

Hereinafter, one preferred embodiment according to the present invention will be described in detail with reference to the accompanying drawings. Briefly explaining the accompanying drawings, Figure 2 shows the overall structure of the disc brake according to the present invention, Figures 3 and 4 are taken to extract the coupling structure of the guide rod according to the present invention.

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 apart at regular intervals to move forward and backward by braking hydraulic pressure. It includes a carrier 30 is installed so that, and a portion of the outer periphery is inserted between the pad plate 50, 60, a disk-like disk 70 that rotates with the wheel (not shown).

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 to the rear of the caliper housing 10 so that the braking hydraulic pressure formed in the master cylinder (not shown) is transmitted, the inner peripheral surface thereof is provided with an elastic seal 13 for restoring the piston 20. . And the finger portion 12 is formed to be bent in the downward direction at the front of the caliper housing 10 to surround the outer pad plate 60. 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 bolted to a knuckle (not shown) of the vehicle body, and the pair of pad plates 50 and 60 to which the pads 51 and 61 are attached can move forward and backward about the disk 70. Is installed. The pad plates 50 and 60 are disposed to be in contact with the tip of the piston 20. The pad plates 50 and 60 are disposed 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. ) Is attached to the outer pad plate 60 attached thereto.

Meanwhile, the caliper housing 10 is slidably coupled to the carrier 30 through the guide rod 40, and the coupling structure thereof will be described in detail with reference to FIGS. 3 and 4.

First, the guide rod 40 is configured to extend in the shape of a rod, the female screw 41 is processed at the top is fixed to the fastening hole 15 through the bolt 16.

In addition, pinholes 31 are formed at both ends of the carrier 30 at positions corresponding to the fastening holes 15 of the caliper housing 10 so that the lower ends of the guide rods 40 are loosely fitted to each other. Since the inner diameter D3 of the pinhole 31 is slightly larger than the lower end diameter D1 of the guide rod 40, the lower end portion of the guide rod 40 maintains an appropriate clearance, thereby allowing the forward and backward movement. At this time, if the clearance is too large, rattle noise is largely generated by friction between the guide rod 40 and the carrier 30 of the metal material inside the pinhole 31, so that it is preferable to design it to have a suitable clearance. On the other hand, the pin hole 31 is filled with a lubricant (潤滑劑, 80) to smoothly move forward and backward movement of the guide rod 40 and to prevent the noise noise between the metal.

In addition, the lower end of the guide rod 40 penetrates comfortably in the pinhole 31 to prevent separation of the lubricant 80 and at the same time prevents direct friction between the guide rod 40 and the carrier 30 and is transmitted from the outside. An annular cushioning member 32 is provided to mitigate the impact. The shock absorbing member 32 is a kind of O-ring made of an elastic material, and a mounting recess 31a recessed in the circumferential direction is formed at the inner circumference of the inlet of the pinhole 31 for its installation. At this time, the inner diameter (D2) of the buffer member 32 is preferably smaller than the inner diameter (D3) of the pinhole 31 and slightly larger than the lower diameter (D1) of the guide rod 40, which is the guide rod 40 In order to prevent the separation of the lubricant (80) filled in the bottom of the pinhole (31) at the same time the smooth movement of the retreat.

Next will be described the assembly process of the guide rod 40 according to the present invention configured as described above.

First, the lubricant 80 is sufficiently filled in the pinholes 31 formed at both ends of the carrier 30, and then the shock absorbing member 32 is inserted into the seating groove 31a. Then, when the lower end of the guide rod 40 is pushed into the pinhole 31, it is allowed to penetrate the buffer member 32 to the bottom of the pinhole 31. At this time, since the inner diameter D2 of the buffer member 32 is formed to be slightly smaller than the inner diameter D3 of the pinhole 31, the detachment of the lubricant 80 filled in the pinhole 31 is prevented.

Subsequently, when the bolt 16 is screwed into the female screw 41 of the guide rod 40 through the fastening hole 15, the caliper housing 10 slides on the carrier 30 through the guide rod 40. Possibly combined.

Next, the braking action and effects of the disc brake configured in this way will be described.

First, when the driver steps on the brake pedal when the vehicle moves forward, a braking hydraulic pressure is formed in the master cylinder, which is transmitted into the cylinder 11 to advance the piston 20 in the direction of arrow A (see FIG. 2).

Accordingly, the inner pad plate 50, which is installed in the carrier 30 so as to move forward and backward, moves forward and rotates inward, and the inner pad 51 rubs against the inner side of the disk 70 to perform a braking action. In addition, the caliper housing 10 slidably coupled through the guide rod 40 moves in the arrow B direction (see FIG. 2) by the hydraulic pressure remaining in the cylinder 11, thereby forming a bent portion downward. 12 pushes the other surface of the outer pad plate 60 and the outer pad 61 is squeezed to the side of the disk 70 to generate a braking force. This braking action is because the lower end of the guide rod 40 is partially out of the pinhole 31 to move the caliper housing 10.

When the brake pedal is released by the driver by releasing the brake pedal, the inner pad 51 and the outer pad 61 are separated from each other by friction with the disk 70 that rotates, so that the piston 20 moves into the cylinder 11. The guide rod 40 is also restored and inserted into the pinhole 31 again.

As such, the braking action of the disc brake is simultaneously performed on both sides of the disc because the caliper housing 10 is slidably coupled to the carrier 30 through the guide rod 40. The pinhole 31 to be coupled is filled with a large amount of lubricant 80 is made easier to operate.

That is, since the ring-shaped buffer member 32 is provided at the inlet portion of the pinhole 31 so as to maintain proper clearance with the guide rod 40, the lubricant 80 filled in the pinhole 31 during the braking action. By preventing the deviating, a sufficient amount of lubricant 80 is always present in the pinhole 31.

On the other hand, when the rotating torque of the disk or the vehicle travels on an uneven road surface, the guide rod 40 is shaken in the pinhole 31, the elastic member buffer member 32 is arranged to surround the guide rod 40 Thus, direct friction between the guide rod 40 and the carrier 30 in the pinhole 31 is prevented. That is, direct frictional shock between the guide rod 40 and the carrier 30 of the metal material is prevented by the shock absorbing member 32 disposed at the inlet of the pinhole 31, thereby preventing rattle noise and of course the overall disc brake. Operation noise is greatly reduced.

This technical idea is not limited to the configuration of the shock absorbing member 32 at the inlet portion of the pinhole 31, and even if a plurality of shock absorbing members 32 are formed at regular intervals in the pinhole 31, the intended purpose of the present invention is provided. Of course it can be achieved.

As described in detail above, according to the guide rod coupling structure of the disc brake according to the present invention, the mounting groove formed in the circumferentially concave direction in the pinhole, and made of an elastic material and the mounting groove so that the other end of the guide rod is allowed to pass through By providing a ring-shaped cushioning member fitted to and coupled to the shaft, separation of the lubricant filled in the pinhole is prevented even in a repeated braking action. In addition, since the direct friction between the guide rod and the carrier is prevented by the buffer member, the shock transmitted from the outside is alleviated, and at the same time, the rattle noise is effectively prevented, thereby improving the reliability of the overall disc brake.

Claims (3)

A caliper housing 10 in which a piston 20 is built in to move back and forth by hydraulic pressure, and a pair of pad plates 50 and 60 are installed to move in and out by the piston 20 and are fixed to the vehicle body 30. In order to slidably couple the caliper housing 10 to the carrier 30, one end is fixed to an end of the caliper housing 10 and the other end is formed with a predetermined depth at an end of the carrier 30. In the disk brake having a guide rod 40 is loosely fitted to the coupling, A seating recess 31a provided in the circumferential direction in the inner circumference of the pinhole 31; A guide rod coupling structure of a disc brake, comprising a ring-shaped buffer member 32 made of an elastic material and fitted into the seating groove 31a to allow the other end of the guide rod 40 to pass through freely. . The method of claim 1, The inner diameter D2 of the shock absorbing member 32 is smaller than the inner diameter D3 of the pinhole 31 and larger than the other end diameter D1 of the guide rod 40. . The method of claim 1, The seating groove (31a) is a guide rod coupling structure of the disc brake, characterized in that provided in the inlet portion of the pinhole (31).