JPH022487B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a caliper structure in a pin-slide vehicle disc brake that includes a cylinder body in which a piston is inserted into a yoke supported by a sliding pin, and the caliper structure thereof. Regarding the molding method.

[Conventional technology]

An example of this type of caliper in which a steel plate yoke is used as a part of the caliper and the yoke is movable in the disk axial direction by the guidance of a sliding pin is disclosed in, for example, Japanese Utility Model Application Publication No. 57-51833. There is.

This caliper is formed by installing a sliding pin on a bracket fixed to the vehicle body parallel to the disk axis, and slidingly supporting the cylinder body attached to the yoke on the sliding pin. Two large and small spaces are connected, and the cylinder body is arranged in the small space, and a part of the disc rotor and a pair of friction pads held by the bracket with the rotor sandwiched in the large space are arranged, respectively. The inner side of the reaction part side piece, which is opposite to the action part side piece of the yoke in which the cylinder body is arranged, serves as a reaction claw.

Then, as the piston inserted into the cylinder body moves forward, one friction pad is pressed against the disc rotor, and the reaction part side piece of the yoke, which moves toward the cylinder body due to this reaction force, pushes the other friction pad against the disc rotor. Press to perform braking action.

[Problem that the invention seeks to solve]

However, in the above-mentioned system, since the sliding pin that supports the yoke and the cylinder body is arranged biased to one side of the working part, the braking torque generates an undesirable rotational force on the caliper, and the friction pad on the other side Since the side piece of the reaction part of the yoke that pushes the pad is made of a flat plate, the pressing force is uneven, making it impossible to exert sufficient braking force, and causing uneven pad wear.

The present invention was made against the background of the above-mentioned circumstances, and aims to improve manufacturing by forming the support arm to which the yoke and the cylinder body are attached, and the support arm to which the sliding pin is attached, from a single plate. The aim is to provide a caliper that solves problems.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention has a first aspect of the present invention, in which a pair of friction pads that press the disk rotor from both sides are arranged in a space inside the yoke, and a piston that pushes one of the friction pads is arranged inside the yoke. In a caliper for a disc brake for a vehicle, in which the inserted cylinder body is attached to the inside of the yoke, and the yoke is movable in the axial direction of the disc rotor by means of a sliding pin, the cylinder body is attached to the side piece of the action part of the yoke. A mounting arm is provided, and a supporting arm for mounting the sliding pin on the mounting arm and a reaction claw for pushing the other friction pad toward the disc rotor by straddling the outer periphery of the disc rotor by means of a bridge part are provided in series; The second invention is characterized by a caliper structure in which a reaction claw is supported in contact with a side piece of a reaction part of a yoke, and a pair of friction pads that press a disc rotor from both sides are arranged in a space inside the yoke, and the friction In a method for forming a caliper for a disc brake for a vehicle, in which a cylinder body with a piston inserted therein for pushing one side of the pad is mounted inside a yoke, and the yoke is movable in the axial direction of a disc rotor by means of a sliding pin. , a mounting arm for the yoke and the cylinder body, a support arm to which a sliding pin is attached continuously to the mounting arm, a bridge portion that straddles the disk rotor, and a bridge portion continuous to the tip of the bridge portion and attached to the back surface of the other friction pad. The reaction claws to be arranged are punched out of a single plate, the support arm is bent parallel to the side surface of the disk rotor, and the bridge part and reaction claw are bent together in the direction of intersection of the yoke. The present invention is characterized by a method of forming a caliper in which the pawl is supported in contact with the side piece of the reaction portion of the yoke.

[Effect]

Therefore, the sliding pin is placed near the top of the disc rotor or its side, and the other friction pad is pressed with equal pressure by a reaction pawl rigidly supported on the reaction side of the yoke. Furthermore, since each component of the yoke and caliper is formed by bending a single plate, materials and manufacturing man-hours can be reduced, leading to cost reductions.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on FIGS. 1 to 3.

In the disc brake 1, a caliper 3 is supported on a bracket 2 fixed to a vehicle body by a sliding pin 4 so as to be movable in the same direction as the disc rotor shaft.

The caliper 3 is constructed by mounting a cylinder body 6 on a yoke 5, and the yoke 5 made of steel plate has a mounting arm 7 of the cylinder body 6, a support arm 8 of the sliding pin 4, and a bridge portion. 9 is integrally formed with a reaction claw 11 disposed on the reaction part side across the outer periphery of the disc rotor 10.

Cylinder hole 12 bored in cylinder body 6
A piston 15 is inserted into the disc rotor 10 to push one of the friction pads 13 of a pair of friction pads 13 and 14 facing each other on both sides of the disc rotor 10 using hydraulic pressure.

The yoke 5, mounting arm 7, support arm 8, bridge portion 9, and reaction claw 11 that constitute the caliper 3 are as follows:
It is formed by punching a single steel plate using a press machine and then bending it. As shown in Figure 3, the shape after processing is shown, a pair of attachments are attached to the inside of the action side piece 5a of the yoke 5. The arms 7, 7 are provided to protrude toward the reaction part side, and the rising parts 16, 16 at the tips of the mounting arms 7, 7 are respectively erected on the outside of the mounting arms 7, 7, and are continuous with the rising parts 16, 16. The formed support arms 8, 8 are bent outward parallel to the side surface of the disk rotor 10, and the bridge portions 9,
9 and the reaction claws 11, 11 arranged on the back surface of the other friction pad 14, the rotor 1 is moved so that each bridge part 9, 9 straddles the outer periphery of the disc rotor 10.
It is formed by integrally bending in the axial direction of 0.
This molding forms a space 17 within the yoke 5.

The arm portions 2a, 2a of the bracket 2 are arranged on both outer sides of the bridge portions 9, 9 in the space portion 17,
A pad spring/retainer member 18 fitted to the U-shaped jaw portions 2b, 2b of the arm portions 2a, 2a,
18, friction pads 13 disposed below the bridge portions 9, 9 and facing each other with the disc rotor 10 in between;
The fourteen ears 13a, 14a are supported without wobbling.

On the inside of the action part side piece 5a between the mounting arms 7, 7,
A mounting protrusion 5c for holding the cylinder body 6 extends together with the mounting arms 7, 7, and through holes 19, 19 for inserting sliding pins are punched into the support arms 8, 8.

The reaction claws 11, 11 have their tips bent slightly inward so that they can press the friction pad 14 evenly, and have projections 11a, 11a protruding from the reaction portion side piece 5b of the yoke 5. , are fixed by welding by contacting the inner surfaces of the protrusions 5d press-formed on the piece 5b.

FIG. 4 shows another embodiment showing a modification of the above embodiment, in which L-shaped receiving pieces 20, 20 are fixed to the upper surface of the reaction section side piece 5b of the yoke 5 so as to protrude toward the space 17 side. , reaction claws 11 on the backs of the receiving pieces 20, 20,
The outer surfaces of 11 are abutted and fixed by welding.

Therefore, in both embodiments, each component such as the yoke of the caliper, the mounting arm, the support arm, the bridge part, and the reaction claw, excluding the cylinder body, is integrally molded from a single steel plate, which reduces the material and manufacturing man-hours. This allows for significant cost reductions.

In addition, since the caliper is supported by the arm of the bracket placed in the space of the yoke above the disc rotor, it is less likely to be subjected to unbalanced loads due to braking torque, and the disc rotor can be moved in the axial direction by the sliding pin. It can be done smoothly.

Furthermore, since the reaction claw is welded and fixed to the side piece of the reaction part of the yoke, the rigidity of the yoke and the reaction claw is increased, and the reaction claw can be folded to fit the shape of the friction pad so that it can be pressed evenly. Because the song was formed,
Effective braking can be performed by effectively using surface pressure, and uneven wear of the friction pads can be prevented.

In the above embodiment, the reaction claw was fixed to the side piece of the reaction portion of the yoke by welding, but the necessary rigidity can be provided to both by simply bringing them into contact.

〔Effect of the invention〕

As explained above, the present invention includes a cylinder body in which a piston for pushing one of a pair of friction pads is inserted, which is mounted inside a yoke, and a mounting arm of the cylinder body is provided by the yoke. A support arm on which the sliding pin is attached and a reaction claw that straddles the disc rotor and pushes the other friction pad toward the disc rotor are connected, and the reaction claw is brought into contact with the side piece of the reaction part of the yoke. Because of the support, the sliding pin can be placed near the top of the disc rotor or its side, suppressing the unbalanced load on the caliper due to braking torque, and the reaction claws are supported in contact with the side pieces of the reaction part of the yoke. This not only improves strength, but also pushes the friction pad with even pressure to prevent uneven wear.

Furthermore, since each component of the caliper is formed by bending a single plate, costs can be reduced by reducing materials and manufacturing man-hours.

[Brief explanation of drawings]

1 to 3 show an embodiment of the present invention,
Fig. 1 is a partial sectional plan view of the disc brake, Fig. 2 is a half sectional rear view, Fig. 3 is a perspective view of the yoke and each member integrally formed therewith, and Fig. 4 shows another embodiment. FIG. 3 is a perspective view of the illustrated yoke and each member integrally formed therewith. 1... Disc brake, 2... Bracket,
2a...Arm portion, 3...Caliper, 4...Sliding pin, 5...Yoke, 5a...Action portion side piece, 5b...
...Reaction part side piece, 5d...Protrusion, 6...Cylinder body, 7...Mounting arm, 8...Support arm, 9...Bridge portion, 10...Disc rotor, 11...Reaction force claw, 13, 14...Friction pad, 15...Piston, 16...Rising portion, 19...Through hole, 20
...Uke piece.

Claims (1)

[Claims] 1. A pair of friction pads that press the disc rotor from both sides are arranged in a space inside the yoke, and a cylinder body in which a piston that pushes one of the friction pads is inserted is installed inside the yoke. In addition, in a caliper for a disc brake for a vehicle in which the yoke is movable in the disk axial direction by a sliding pin, a cylinder body mounting arm is provided on the action portion side piece of the yoke, and the sliding arm is provided on the mounting arm. A support arm on which the pin is mounted and a reaction claw that pushes the other friction pad toward the disk rotor by straddling the outer periphery of the disc rotor by means of a bridge part are provided in series, and the reaction claw is attached to the side piece of the reaction part of the yoke. A caliper structure for a vehicle disc brake characterized by contact support. 2 A pair of friction pads that press the disc rotor from both sides are arranged in the space inside the yoke, a cylinder body with a piston inserted therein that pushes one of the friction pads is installed inside the yoke, and the yoke is In a method for molding a caliper for a disc brake for a vehicle that is movable in the axial direction of a disc rotor by a sliding pin, a sliding pin is continuously mounted on the mounting arm of the yoke and the cylinder body, and on the mounting arm. A support arm, a bridge portion that spans the disk rotor, and a reaction claw that is continuous to the tip of the bridge portion and placed on the back side of the other friction pad are punched out of a single plate, and the support arm is parallel to the side surface of the disk rotor. A caliper for a disc brake for a vehicle, characterized in that the bridge portion and the reaction claw are integrally bent in the cross direction of the yoke, and the reaction claw is supported in contact with the side piece of the reaction portion of the yoke. molding method.