KR19980067669U - Disc brake with return function of caliper body - Google Patents

Abstract

The present invention relates to a disc brake having a return function of a caliper body that allows the inner and outer pads to be easily separated from the disc by allowing the caliper body to return smoothly when the brake is released. A caliper bracket having an inner pad and an outer pad which is formed and is slid across both sides of the disk, and the pinholes at both ends so as to contact the inner pad and the outer pad to the disk, respectively, by the action of a piston in the cylinder. In the disc brake consisting of a caliper body fixed to the sliding pin to be coupled, an annular groove is formed on the inner circumferential surface of the pinhole, the elastic member is in close contact with the sliding pin is inserted into the groove, the sliding pin is the brake operation Once sliding into the pinhole It provides a disk brake made to compress the elastic member.

Description

Disc brake with return function of caliper body

The present invention relates to a disc brake of an automobile, and more particularly, an annular groove is formed on an inner circumferential surface of a pin hole in which sliding pins are in sliding contact, and grooves of the sliding pins are formed on grooves. A disc brake having a function of returning a caliper body to facilitate the return of a caliper body when a brake is released by inserting a close elastic member.

In general, a vehicle is provided with a braking device that serves to slow down or stop the vehicle speed while driving.

The brake system is a booster that doubles the pedal effort by using the vacuum pressure (engine suction pressure) generated by the power of the engine, creates pressure in each brake circuit, and changes the volume of the brake oil. It consists of a master cylinder that quickly compensates for the loss of circuit pressure and a wheel cylinder that stops the rotation of the wheel by the brake oil pressure and reduces the rotation speed.

The wheel cylinder is in close contact with an inner peripheral surface of the cylindrical drum synchronously rotating with the wheel wheels to close the brake shoe installed in the inner side of the wheel brake to generate a braking force, or to close the pad to the disk-shaped disk synchronously rotating with the wheel wheel It is installed in the disc brake that generates the braking force to activate the brake.

Here, a typical example of a conventional disc brake is illustrated in FIGS. 1 and 2, which will be briefly described as follows.

As shown in the figure, the disc brake is largely installed to rotate synchronously with the wheel wheel, and the inner and outer pads 125 which are fixed to the inner knuckle arm of the wheel wheel and slide with both sides of the disk 110 interposed therebetween ( Caliper bracket 120 having a 126 and a caliper sliding through the caliper bracket 120 to bring the inner and outer pads 125 and 126 into contact with the disk 110 by the action of the piston 132 according to the hydraulic pressure. The body 130 is comprised large.

At the lower end of the caliper bracket 120, a support part 121 having a through hole 122 is formed to be fixed to the knuckle arm through a bolt, and guide parts 123 having pin holes 123a are formed at both ends of the upper part. The inside of the guide part 123 is provided with a guide bracket 124 on which the inner and outer pads 125 and 126 slide.

A cylinder 131 is formed in the center of the caliper body 130 in the sliding direction of the inner and outer pads 125 and 126, and a piston 132 is provided in the cylinder 131 to enter the cylinder 131. The inner pads 125 and 126 are slid toward the disk 110 by the injected hydraulic pressure, and fastening holes 133 corresponding to the pin holes 123a are formed at both ends thereof, such that the pin holes of the guide part 123 are formed. A sliding pin 134 coupled to the 123a is fixed to the fastening hole 133 through the bolt 135. In addition, the lower end of the caliper body 130, the contact portion 138 is the outer side to contact the outer pad 126 to the outer surface of the disk 110 in response to the piston 132 during the operation of the piston 132. It extends to the pad 126 side and supports the back side thereof.

According to the conventional disc brake configured as described above, the pressure of the vacuum booster acting upon the stepping of the brake pedal injects the brake oil of the master cylinder into the cylinder 131 of the caliper body 130. At this time, the piston 132 is in close contact with the disk 110 while advancing by the injected brake oil.

While the inner pad 125 is in close contact with the disk 110, the caliper body 130 reacts backward with respect to the forward action of the piston 132 by the pressure of the brake oil. At this time, the caliper body 130 moves backward while sliding in the guide hole 123 of the caliper bracket 120 through the sliding pin 134. The close contact portion 138 formed at the lower portion of the caliper body 130 moving backward pulls the outer pad 126 to closely contact the outer surface of the disk 110.

According to the above process, the contact of the disk 110 of the inner and outer pads 125 and 126 stops the rotational motion of the disk 110 through the friction force or slows down the rotational speed.

However, after the brake is released, the inner pad 125 interposed on the cylinder 131 side is smoothly returned by the flow of the piston 132, but the outer pad 126 interposed on the opposite side is provided by the caliper body 130. Because of the flow, the return action was not smooth. That is, the outer pad 126 relies on the sliding pin 134 sliding to the pinhole 123a formed in the guide portion 123 of the caliper bracket 120, but the mechanism for returning the sliding pin 134 is separately Since the outer pad 126 is in contact with the disk 110 even after the release, there is a problem that hinders the running of the vehicle.

In addition, due to the contact between the disk 110 and the outer pad 126, there is a problem of shortening the life of the brake due to premature wear of the outer pad 126 and causing noise and vibration caused by the contact.

Therefore, the present invention has been devised in view of the above-described conventional problems, and the return function of the caliper body allows the inner and outer pads to be easily separated from the disc by allowing a smooth return action of the caliper body when the brake is released. It is to provide a disk brake having.

1 is a perspective view of a partially cut bottom view showing a conventional disc brake

Figure 2 is a cross-sectional view showing the structure of the sliding pin and the pinhole of the conventional disc brake

Figure 3 is a bottom perspective view showing the lumbar incision showing the disc brake having a return function of the caliper body according to an embodiment of the present invention

4 is a cross-sectional view of the main portion showing the disc brake according to an embodiment of the present invention

Explanation of symbols on the main parts of the drawings

20: Caliper Bracket 23a: Pinhole

23b: groove 24: elastic member

25: inner pad 26: outer pad

30: caliper body 34: sliding pin

The present invention for achieving the above object is a guide portion having a pinhole at both ends and a caliper bracket having an inner pad and an outer pad that slides across both sides of the disk, and the inner side by the action of the piston in the cylinder In the disc brake composed of a caliper body is fixed to the sliding pin coupled to the pin hole at both ends so as to contact the pad and the outer pad, respectively, an annular groove is formed on the inner peripheral surface of the pin hole, An elastic member in close contact with the sliding pin is inserted to provide a disc brake configured to compress the elastic member while the sliding pin slides into the pin hole when the brake is operated.

Hereinafter, an embodiment of the present invention will be described in more detail based on the accompanying drawings.

3 and 4 illustrate a disc brake having a return function of a caliper body according to an embodiment of the present invention, and has an annular groove (in the inner circumferential surface of the pinhole 23a formed in the guide portion 23 of the caliper bracket 20). 23b) is recessed, and the elastic member 24 in close contact with the sliding pin 34 is inserted into the groove 23b. That is, the sliding pin 34 coupled to the caliper body 30 with the bolt 35 during the brake operation is slid into the pinhole 23a to compress the elastic member 24.

In addition, the elastic member 24 is made of a rubber material to increase the adhesion with the sliding pin (34).

Accordingly, the piston 32 is advanced by the pressure of the brake oil injected into the cylinder 31 of the caliper body 30 during the brake operation, and the inner pad 25 is brought into close contact with the disc 10, and the caliper body ( 30 reacts backward to the forward action of the piston 32. At this time, the caliper body 30 slides in the guide hole 23 pinhole 23a of the caliper bracket 20 through the sliding pin 34 to bring the outer pad 26 into close contact with the outer surface of the disk 10. .

As described above, while the sliding pin 34 is slid in the A direction to the pinhole 23a, the elastic member 24 inserted into the groove 23b of the pinhole is compressed by the flow of the sliding pin 34. It becomes a state. On the other hand, in the brake release process, as the oil pressure in the cylinder 31 is removed, the inner pad 25 that pressurizes the inner surface of the disk 10 is returned together with the piston 32. At this time, the sliding pin 34 returns to the caliper body 30 while returning to the B direction in the pinhole 23a by the elastic repulsive force of the compressed elastic member 24, the outer pad 26 to the disk 10 ) On the outer side of the

As described above, the present invention smoothly returns the caliper body by using the elastic repulsive force of the elastic member compressed by the sliding pin when releasing the brake, thereby easily separating both the inner pad and the outer pad from the disk.

Therefore, the present invention can solve the problem that each pad is in contact with the disc even after the brake is released, which hinders the driving ability of the vehicle, and shortens the life of the brake due to premature wear of the pad due to the disc and the pad. Noise and vibration can be prevented.

Although the present invention has been shown and described in connection with specific embodiments, it is common knowledge in the art that various modifications and changes can be made without departing from the spirit and scope of the invention as indicated by the appended utility model registration claims. Anyone who has a can easily know.

Claims (2)

Guide portions having pinholes are formed at both ends and caliper brackets having inner pads and outer pads sliding across both sides of the disk, and the inner pad and outer pad are brought into contact with the disk by the action of a piston in the cylinder. In the disc brake consisting of a caliper body is fixed to the sliding pin coupled to the pin hole at both ends, an annular groove is formed on the inner circumferential surface of the pin hole, the elastic member is in close contact with the sliding pin is inserted into the groove The disc brake, characterized in that the sliding pin is sliding to the pin hole during the brake operation to compress the elastic member. The disk brake of claim 1, wherein the elastic member is made of a rubber material.