KR100569459B1 - guide pin deformation prventing sturcture of disc brake caliper - Google Patents

Abstract

The present invention relates to a guide pin deformation prevention structure of a disc brake caliper, and the carrier 10 is divided into an inner and an outer carrier (11, 12), and both of the leading body side support body is coupled to the bolt 30, The guide hole h 'formed in the support body on the trailing part side of the outer carrier 12 is formed in a slot shape having a diameter extending in the deformation direction of the support body during braking.

Therefore, even when the trailing part side support body of the outer carrier 12 is deformed during braking, a free length is formed by an extended diameter of the guide hole h ', and thus the guide pin 3 is not deformed, thereby dragging. The phenomenon can be prevented, and the occurrence of judder, abnormal wear, noise, etc. caused by this can be prevented.

Description

Guide pin deformation prventing sturcture of disc brake caliper

1 is an exploded perspective view of a caliper of a general disc brake;

2 is a plan view of the caliper,

(A) and (b) of FIG. 3 are diagrams showing deformation states of a carrier and a caliper housing, respectively.

4 is a front perspective view of a carrier according to the present invention;

5 is a rear perspective view of the carrier according to the present invention;

6 is an enlarged perspective view of the inner side of the support body of the trailing portion side of the inner carrier;

FIG. 7 is a diagram corresponding to FIG. 3 and illustrates a modified state of the carrier to which the present invention is applied. FIG.

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

2: piston, 3: guide pin,

4: caliper housing, 10: carrier,

11: inner carrier, 12: outer carrier,

11a, 12a: coupling end, 21: inner brake pad,

22: outer brake pads, 30: bolts,

g: guide jaw, h, h ': guide ball.

The present invention relates to a caliper of a disc brake using a floating type caliper, and more particularly to a guide pin deformation prevention structure of a disc brake caliper which can prevent the guide pin from being deformed by a load generated during braking. It is about.

In general, as shown in FIG. 1, a caliper may include a carrier 1 in which a brake pad is installed, a piston 2, and a sliding movement through a guide pin 3 in the carrier 1. It consists of a caliper housing (4) mounted so that the carrier (1) is mounted to the knuckle.

Therefore, when brake hydraulic pressure is generated by the driver's brake pedal operation, the piston 2 pushes the inner brake pad, and the reaction force of the caliper housing 4 is in the opposite direction (the arrow direction in FIG. 2, the guide pin 3). The outer brake pads are pushed by the finger portion 4a on the front surface of the caliper housing 4 by moving in the direction away from the guide hole 1a of the carrier 1 so that both brake pads are brought into close contact with the brake disk. The braking force is to be generated.

However, during braking, a strong load is applied to the carrier 1 by friction between the brake disc and the two brake pads, so that deformation occurs in the rotation direction (arrow direction) of the brake disc as shown in FIG. do.

In particular, the amount of deformation of the trailing portion in front of the rotational direction is large and a large deformation occurs at the outer side (outer brake pad mounting portion) rather than the inner side (inner brake pad mounting portion), and as a result, as shown in FIG. Induces deformation of the trailing portion guide pin (3).

When the guide pin 3 is deformed as described above, the caliper housing 4 cannot slide smoothly with respect to the carrier 1 (increasing sliding force), and in severe cases, a stick phenomenon occurs and is normal. There was a problem that makes it impossible to operate.

 In addition, as described above, when the sliding mobility of the caliper housing 4 is reduced, the brake pad and the brake disc are not separated from each other even when the brake hydraulic pressure is released, so that the braking force is generated even when the driver takes his foot off the brake pedal. This can cause problems such as judder, abnormal wear and increased wear on brake pads or discs, squeal noise and turning noise.

Accordingly, the present invention has been made to solve the above problems, to prevent the drag and stick phenomenon by preventing the deformation of the guide pin, thereby to solve the various problems caused by the conventional drag phenomenon disc brake caliper The purpose of providing a guide pin deformation prevention structure of the.

The present invention for achieving the above object, in the caliper of the disc brake consisting of a carrier provided with an inner and outer brake pad, and a caliper housing built in the piston and slidably movable to the carrier via a guide pin. The carrier is divided into an inner carrier and an outer carrier, and the supporting body of the inner carrier and the outer carrier is fixed to each other by bolts, and the guide hole formed on the trailing part of the outer carrier supports the trailing part. Characterized in that it is formed in a slot shape extending in the deformation direction of the body.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

Figure 4 shows the carrier to which the present invention structure is applied from the outside (outside the vehicle) on the basis of the mounting state, Figure 5 is shown from the inside (inside the vehicle) (inner and outer brake pads installed), the present invention The carrier 10 is divided into two parts, an inner carrier 11 and an outer carrier 12.

That is, the middle portion of the body, which is conventionally integrated, is divided in the brake disc rotation direction (arrow direction) so that the inner carrier 11 and the outer carrier 12 are made of individual components.

However, as when the inner carrier 11 and the outer carrier 12 are all integrally formed, the support body and the connecting body connecting the connecting body and the leading body of the trailing part are connected to each other. The guide jaw g is formed so that the pad 21 and the outer brake pad 22 can be slidably moved, and the guide pins 3 fixed to the caliper housing 4 are slid and moved. While guide holes (h) are formed, bolt holes for bolting to the knuckle are formed on both sides of the connection portion of the inner carrier (11).

The inner carrier 11 and the outer carrier 12 made of individual components as described above are formed with coupling end portions 11a and 12a for forming bolt holes on the outer surface of the support body of each of the leading portion side. The bolts 30 are coupled to each other by penetrating through 11a and 12a.

In addition, the guide hole (h ') formed in the support body of the trailing portion side of the outer carrier 12 of the guide holes (h), as shown in Figure 6 so as to accommodate the deformation of the support body when braking The diameter is expanded to form a short arc-shaped slot.
That is, since the trailing portion side support body of the outer carrier 12 is deformed along a circumference around the fixed leading side support body, the guide hole h 'is the leading body side support body of the outer carrier 12. It extends in diameter along the circumference which makes the distance from the inside to itself a radius, and forms short arc-shaped slot.

The operation and effects of the present invention will now be described.

When braking hydraulic pressure is applied to the piston 2 by the driver's brake pedal operation while the brake disc is rotating in the direction of the arrow shown in FIGS. 4 and 5, the inner and outer brake pads 21 and 22 are in close contact with both sides of the brake disc. And the braking force is generated.

At this time, a load in the direction as shown in (a) of FIG. 3 is generated in the carrier 10 such that the trailing body side support body is deformed in the rotational direction of the brake disc.

However, in the present invention, the inner carrier 11 and the outer carrier 12 are divided, and in particular, the guide hole h 'formed in the trailing part side support body of the outer carrier 12 is the leading part side of the outer carrier 12. It has a slot shape with a diameter extending along a circumferential line whose radius is the distance from the support body to itself, and even if deformation occurs in this portion, the deformation force is located inside the guide hole h '. It does not affect the guide pin (3).

That is, as shown in FIG. 7 by the slot-shaped guide hole h ', the guide pin 3 on the inner side of the support body of the trailing portion side of the simultaneous outer carrier 12 is deformed in the rotation direction of the brake disc. The marginal deformation distance C which may not be in contact with is secured.

Therefore, the guide pin 3 does not cause deformation, and thus the sliding force required when the caliper housing 4 slides left and right does not increase, so that the caliper housing 4 can smoothly move in the left and right directions. Will be.

Therefore, the brake pads can be reliably spaced away from the brake disc in the state where the brake hydraulic pressure is released by releasing the brake pedal, so that the friction materials are in contact with each other even after the braking operation is canceled, so that a drag phenomenon that generates a braking force does not occur. , Stick phenomenon caused by the severe deformation of the guide pin (3) is also not generated.

In addition, the drag phenomenon is prevented from occurring as described above, thereby preventing judders, brake pads and discs from abnormal wear and increased wear, squeal noise, and turning noise. You can do it.

On the other hand, the leading part of the carrier 10 was able to secure a sufficient rigidity that the guide pins are not deformed by the conventional structure, but the present invention is because the rigidity is weakened by the separation of the carrier, each inner and outer carrier Coupling end portions 11a and 12a are formed at 11 and 12 and through-fastening them with bolts 30 to reinforce its rigidity.

In addition, since the trailing part side support body of the outer carrier 12 is allowed to have some independent behavior with respect to other parts, the damping effect is generated against the brake torque variation (BTV) and the front and rear force variation. There is also.

As described above, according to the present invention, the caliper housing can be slidably moved left and right with respect to the carrier by preventing deformation of the guide pin due to carrier deformation during braking, thereby preventing the occurrence of drag and stick phenomenon.

In addition, due to the prevention of the drag phenomenon, it is possible to prevent the occurrence of judder, abnormal wear and early wear, and various noises generated by this.

In addition, a damping effect can be expected for a change in brake torque or a change in front and rear force.

Claims (1)

A caliper housing (4) having a carrier (10) provided with inner and outer brake pads (21, 22), a piston (2) therein, and slidably installed on the carrier (10) via guide pins (3). In the caliper of the disc brake made of, The carrier 10 is divided into an inner carrier 11 and an outer carrier 12, and the support body on the leading part side of the inner carrier 11 and the outer carrier 12 is fixed by a bolt 30, and the outer The guide hole h 'formed in the trailing portion side support body of the carrier 12 is formed in a slot shape having an expanded diameter along a circumference line having a radius from the leading portion side support body of the outer carrier 12 to the radius thereof. Guide pin deformation prevention structure of the disc brake caliper.

Images