JPH05272561A - Disk brake for vehicle - Google Patents

Abstract

PURPOSE:To prevent a brake from being trailed by providing a bellows section having a low-load spring characteristic at a pad end section on the side where a brake pad is separated from a disk rotor, and providing a pad return spring on one side of the side spring of a pad clip. CONSTITUTION:A pad return spring 9 is provided on one side of the side spring 8 of a pad clip, a brake pad and the bellows section 9a of the pad return spring 9 follow in the rotary shaft direction of a disk rotor 1 when a brake is applied, the bellows section 9a is elastically deformed on the axis centering on a support section 9b1, the bellows section 9a is elastically deformed in the rotary shaft direction of the disk rotor 1, and the bellows section 9a can secure stable returning force without collapsing. When the brake is released, the increase of the returning force is reduced by the bellows section 9a having a low-load spring characteristic against the abrasion of the brake pad, and the brake pad can be quickly separated from the rotary shaft direction of the disk rotor 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc brake for braking a vehicle.

[0002]

2. Description of the Related Art As a conventional technique of this type, for example, Japanese Utility Model Laid-Open No. 58-58124 has been known. This is a disk rotor that rotates integrally with the wheel, a pair of brake pads that face each other via the disk rotor, and a pair of brake pads that slidably support the pair of brake pads in parallel with the rotation axis of the disk rotor and that is fixed to the vehicle. Mounting, a caliper that is slidably attached to the mounting and presses each of a pair of brake pads in the disc rotor direction, and pad springs arranged so that both ends extend in the chord direction with respect to the disc rotor. The pad spring is an M-shaped spring whose center is attached to the brake pad, and both ends of the pad spring are elastically locked to the carrier arm. The carrier arm and the pad spring are locked. Using the frictional force applied to the arm, the locking part is slid onto the arm to obtain elastic force In which the brake pads to prevent the dragging of the braking return way away from the disc rotor by the force.

[0003]

However, in the above-mentioned prior art, M which is stretched between the outer peripheral portions of the brake pads is used.
Although the brake pad follows the backward movement of the arm part and returns so as to be separated from the disc rotor by the U-shaped pad spring, the locking part of the pad spring does not return to the natural position of the arm part of the carrier against uneven wear. Since the elastic force of the pad spring cannot be obtained, the brake pad cannot be quickly separated from the disc rotor when the brake is released next time, and the brake may be dragged.

Therefore, an object of the present invention is to quickly separate the brake pad from the disc rotor against uneven wear and to simplify the structure.

[0005]

[Constitution of the invention]

[0006]

Means for Solving the Problems The technical means of the present invention taken to solve the above-mentioned technical problems are as follows.
A disc rotor that rotates integrally with a wheel, a pair of brake pads that face each other via the disc rotor, and a pair of brake pads that have notches are slidably supported in parallel with the rotation axis of the disc rotor, and the vehicle A mounting fixed to a fixed portion, a caliper slidably mounted on the mounting to press each of the pair of brake pads toward the disc rotor, and the brake pads are rattled by urging the brake pads in parallel with the friction surface. A pair of brake pads provided with a retaining member that retains in the cutout without sticking, and a side spring that is provided on one side of the brake pad and that has an elastic portion that extends toward the brake pad and biases the brake pad in the circumferential direction. The inner surface of the cutout portion in the thickness direction between the side end surface on one side and the inner surface of the cutout portion facing the side end surface. With the pad clip that is locked to the mounting, the bellows-like bellows part with a low-load spring characteristic that is crimped to the end of the brake pad on the side where the brake pad is separated from the disc rotor, and the tip of the bellows part. A pad return spring provided on one side of the side spring of the pad clip, which comprises an arm extending from the pad clip and having a supporting portion supported so as to be engaged and on the axis of the bellows portion. is there.

[0007]

The above technical means works as follows. One brake pad presses one side of the rotating disk rotor, and at the same time, the caliper is displaced by its reaction force, and the other brake pad is pressed by the reaction force to perform a braking action.

At this time, by providing a pad return spring provided on one side of the side spring of the pad clip, the bellows of the pad return spring follow along with the brake pad in the disc rotor rotation axis direction during braking operation, Along with the follow-up, elastic deformation of the bellows portion is performed on the axis with the support portion as an axis, and the bellows portion of the pad return spring is elastically deformed in the disc rotor rotation axis direction.

[0009] The elastic deformation of the bellows portion, which has a spring characteristic of a low load against uneven wear when the brake is released, reduces the increase in the returning force of the brake pad from the disc rotor rotation axis direction, and at the same time reduces the bellows portion in the disc rotor rotation axis direction. The brake pad is rapidly separated from the disc rotor rotation axis direction by the deformation.

[0010]

Embodiments to which the present invention is applied will now be described in detail with reference to the accompanying drawings.

A description will be given with reference to FIGS. 1 and 2 to 3. The disc brake 9 includes an inner pad 2, an outer pad 3, a mounting 4, and a caliper 5. The inner pad 2 and the outer pad 3 are arranged on both sides of the disc rotor 1 that rotates with the wheels.

The inner pad 2 has ears 2a on both end portions,
The inner side of the disc rotor 1 is formed with 2b and is supported slidably in the disc rotor axial direction by a mounting 4 which will be described later and is fixed to a fixing member (not shown) of the vehicle body. Further, the back portion thereof is configured to be pressed toward the disc rotor 1 by a pair of pistons (not shown) arranged along the rotation direction of the disc rotor 1. The outer pad 3 is formed with ears 3a and 3b and is arranged in a caliper 5 which is integrally provided.

The mounting 4 is formed with arms 4a and 4b. The arm portions 4a and 4b have cutout portions 4c. The notch 4c is provided with a pad clip 6 having corrosion resistance. The caliper 5 is composed of a cylinder portion 5A and a reaction portion 5B. The cylinder portion 5A is arranged on the back portion of the inner pad 2. The reaction portion 5B is a bridge portion 5b arranged on the outer periphery of the reaction claw 5b1 that abuts on the back surface of the outer pad 3, the disk rotor 1, and the back surface of each pad 2, 3.
Have two. The reaction claw 5b1 is configured to press the outer pad 3 toward the disc rotor 1.

2 to 3, the pad clip 6 is shown.
Has a corrosion resistance and is composed of a holding member 7, side springs 8, and pad return springs 9. The pad clip 6 is the notch 4 of the mounting 4.
It is provided between the inner surface of c and both ears 3a of the outer pad 3,
The pair of outer pads 3 are locked to the mounting 4 so as to be sandwiched in the thickness direction along the inner surface of the notch 4c between the side end surface of each ear 3a and the inner surface of the notch 4c facing the side end surface. The holding member 7 is arranged on the surface that receives the outer pad 3 from the inner side in the radial direction of the disc rotor, and presses the outer pad 3 outward in the radial direction of the disc rotor by a bend (not shown) to prevent the outer pad 3 from rattling.
Further, the side spring 8 is arranged on the surface that receives the pads 2 and 3 from one side in the disk rotor rotation direction, and prevents abnormal noise due to vibration.

The pad return spring 9 according to one embodiment of the present invention has corrosion resistance and is provided on one side of the side spring 8 of the pad clip 6 and is integrally molded with the pad clip 6. In addition, the pad return spring 9 is swaged so that the pad return spring 9 can be rotated by the arm 9b of the pad return spring 9 on both ears 3a on the side where the outer pad 3 is separated from the disc rotor 1, and the spring interference during assembly. Is being prevented. The arm portion 9a1 of the pad return spring 9 has an arm portion 9a1.
Normally, a bellows-shaped bellows portion 9a having a low spring characteristic with respect to a spring used for preventing drag is used.

The bellows portion 9a of the pad return spring 9
Quickly separates the outer pad 3 from the disc rotor and prevents the outer pad 3 from being excessively returned due to uneven wear.

The other arm portion 9b is formed in an L shape and fitted into the arm portions 4a and 4b of the mounting 4. A support portion 9b1 is formed on the arm portion 9b. The support portion 9b1 is engaged with the tip end portion 9a2 of the bellows portion 9a so as to come along the axis line as shown in the axis line in FIG. 3 while tracing the arm portion 9b, and is supported by the tip end portion 9a2.

Therefore, when the braking operation is released, the pad return spring 9 follows along with the outer pad 3 in the rotation axis direction of the disc rotor, and the support portion 9b1 follows the follow-up.
As shown by the line in FIG. 3, the bellows portion 9a is elastically deformed along the axis, and a stable returning force can be secured without the bellows portion 9a falling forward.

Further, since the pad return spring 9 is near the notch 4c of the mounting 3, when the outer pad 3 is separated from the disc rotor 1, the inclination of the outer pad can be prevented.

Since the inner pad 2 has the same structure, the description of its structure and operation will be omitted.

[0021]

According to the present invention, the pad return spring provided on one side of the side spring of the pad clip allows the bellows of the pad return spring to follow along with the brake pad in the disc rotor rotation axis direction during braking operation. Following this, elastic deformation of the bellows part is performed on the axis with the support part as the axis, and the bellows part of the pad return spring is elastically deformed in the direction of the disc rotor rotation axis to provide a stable return force without the bellows part falling. Can be secured. The elastic deformation of the bellows part, which has a low spring resistance against the wear of the brake pad when the brake is released, reduces the increase in the returning force of the brake pad from the disc rotor rotation axis direction, and also reduces the increase of the bellows part in the disc rotor rotation axis direction. The deformation allows the brake pad to be quickly separated from the rotation direction of the disk rotor, and the intended purpose can be achieved.

[Brief description of drawings]

FIG. 1 is a side view showing a configuration of a disc brake of this embodiment.

FIG. 2 is a front view showing the configuration of the disc brake of the present embodiment.

FIG. 3 is a top view from the line of sight A shown in FIG.

[Explanation of symbols]

1 Disc Rotor 3 Outer Pad, 3a, 3b Ear 4 Mounting 4c Notch 5 Caliper 8 Pad Clip 9 Pad Return Spring, 9a Bellows, 9a1
Arm 9a2 Tip, 9b Arm, 9b1 Support 10 Disc brake

Claims (1)

[Claims] 1. A disc brake that rotates integrally with a wheel, a pair of brake pads that are opposed to each other via the disc brake, and a pair of brake pads that have notches and that slide in parallel with the rotation axis of the disc rotor. A mounting that supports the brake pad and is fixed to a fixed portion of the vehicle, a caliper that is slidably mounted on the mounting and presses each of the pair of brake pads toward the disc rotor, and the brake pad that is parallel to the friction surface. Holding member for holding the brake pad in the cutout portion without rattling by biasing the brake pad, and one side of the brake pad having an elastic portion extending toward the brake pad and biasing in the circumferential direction of the brake pad. And a side end surface of one side of the pair of brake pads having side springs To the inner surface of the cutout portion facing the inner surface of the cutout portion in the thickness direction across the pad clip locked to the mounting, and the end portion of the brake pad on the side where the brake pad is separated from the disc rotor The pad clip has a bellows-shaped bellows portion which is swaged into a low load and has a spring characteristic, and a support portion which is supported so as to be engaged with a tip end portion of the bellows portion and on the axis of the bellows portion. And a pad return spring provided on one side of the side spring of the pad clip, the disc brake for a vehicle.