JP2571520Y2 - Disc spring pad spring - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pad spring interposed in an engagement portion between a pad supporting arm and a pad in a vehicle disk brake.

[0002]

2. Description of the Related Art FIGS. 4 to 8 show an example of a conventional disk brake (Japanese Utility Model Laid-Open No. 1-154339). In the drawings, reference numeral 1 denotes a rotor which rotates integrally with wheels and the like. Reference numeral 2 denotes a torque receiving member fixed to a stationary portion such as a vehicle body. A pair of arms 2a and 2b are provided on both sides of the torque receiving member in parallel with the axis of the rotor 1. The outer peripheral surface of the rotor 1 of each arm 2a and 2b. Relief grooves 2c and 2d (see FIG. 4) are formed in a portion opposed to. Reference numerals 3 and 4 are guide pins, which are provided upright on the respective arms 2a and 2b of the torque receiving member 2. Reference numeral 5 denotes a caliper that is fitted to the guide pins 3 and 4.

As shown in FIG. 6, a caliper 5 includes an actuator section 5a, a reaction section 5b straddling the rotor 1 and facing the actuator section 5a, and a parking brake device section 5c provided on the opposite side of the actuator section 5a. Consists of A piston 6 is slidably fitted in the cylinder 5d of the actuator section 5a.

[0004] Reference numerals 7 and 8 denote a pair of pads, and back plates 7a and 8a.
And linings 7b and 8b. Each back plate 7a, 8a
U-shaped engagement grooves 7c (see FIG. 7) and 8c
A pad 7, 8 is movably mounted on each arm 2a, 2b of the torque receiving member 2 via a pad spring 9, which will be described later. 7d (see FIG. 7),
Reference numeral 8d (not shown) denotes a retaining groove formed on the upper surface of each of the engaging grooves 7c, 8c.
(See FIG. 5).

As shown in FIGS. 4 and 5, a pair of pad springs 9 elastically hold the sliding surfaces of the pads 7, 8 to improve the corrosion resistance and abrasion resistance of the sliding surfaces of the pads 7, 8 and reduce vibration. It is a member for the purpose of prevention.

As shown in detail in FIG. 8, the pad spring 9 has a substantially U-shaped main body 9a in contact with the entire sliding surfaces of the pads 7, 8, and protrudes from the center of the upper surface of the main body 9a. The main body 9a further includes a mounting portion 9c and a hanging portion 9 which is bent at a right angle from the mounting portion 9c and continues.
d, a pair of lower claws 9e provided at right and left sides of the lower portion of the hanging portion 9d, and an intermediate hook projecting obliquely downward at the center of the hanging portion 9d above the lower nail 9e. Nail 9
f. The extension portion 9b is formed by bending the center of the mounting portion 9c obliquely upward, and the bent portion has a spring property.

[0007]

[Problems to be solved by the invention]
FIG. 7 shows a portion where the pad spring 9 of the conventional device of No. 54339 applies an acting force to the pad 7 in the rotor circumferential direction.
Is a point at the upper end of the hanging part 9d. For this reason, the lower portion of the pad 7 swings in the direction of the rotor axis to generate a rattling sound or a brake squeal.

An extension 9b extending from the main body 9a
Is resiliently contacted with the inside of the caliper 5 or the pad retraction spring 10.
5, or the positional relationship with the pad retraction spring 10 fluctuates greatly, and the circumferential acting force on the pad 7 varies greatly. Therefore, the movement of the pad 7 in the rotor axis direction is poor, and the delay in braking effect and poor return are caused. Occur. In addition, the assemblability of the brake is complicated, and the pad spring 9 is provided with an extended portion 9b extending from the main body 9a.
Therefore, there is a problem that the pad spring becomes large and the material removal is poor.

[0009]

In order to solve the above-mentioned problems, in the present invention, a pair of pads are provided on both sides of a torque receiving member so as to be in parallel with the rotor axis, and frictionally engage with both side surfaces of the rotor. In a disc brake in which a pad is slidable by interposing a plate-shaped pad spring at an engaging portion between the opposed arm and the pad, the pad spring having a cross-sectional shape. A substantially U-shaped channel, the web portion of which has a curved shape protruding toward the inside of the channel, and the pad spring is provided so as to cover the inner surface of the engaging groove of the engaging portion. Is configured.

The cross-sectional shape of the above-mentioned pad spring is substantially U-shaped channel shape, and two or more ridges projecting toward the inside of the channel are formed on the web portion of the pad spring. You may comprise.

[0011]

There are two or more locations where the pad spring configured as described above exerts an acting force on the pad in the circumferential direction of the rotor, including the inner circumferential side and the outer circumferential side of the rotor in the engaging groove between the pad and the arm. Therefore, the swing of the pad in the rotor axis direction is restricted by this, so that it is possible to prevent rattle noise and brake squeal.

Further, the acting force on the pad in the circumferential direction due to the spring force of the pad spring of the present invention is determined only by the dimensional relationship between the engaging portion of the torque receiving member and the engaging groove of the pad. Can be reduced, so that the acting force can be set low. Therefore, the sliding resistance of the pad in the rotor axis direction can be reduced, and a delay in braking effect and a poor return of the pad can be prevented.

In the pad spring according to the present invention, the cross-sectional shape of the portion covering the inner peripheral surface of the engagement groove is formed in a substantially U-shape, and the extended portion is formed like the conventional pad spring shown in FIG. Therefore, the size and the weight can be reduced, and the assemblability is also facilitated.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. In the present invention, as shown in FIGS. 4 to 6, arms 2a and 2b are provided on both sides of the torque receiving member 2 in parallel with the rotor axis.
A pair of pads 7 and 8 that frictionally engage with both side surfaces of the rotor 1 are mounted between the two arms 2a and 2b, and the opposite arms 2
The present invention relates to a disk brake in which pads 7 and 8 are slidable with a plate-shaped pad spring interposed between engagement portions between a and 2b and pads 7 and 8.

FIGS. 1 and 2 show a first embodiment of the present invention, wherein the same reference numerals as those described above denote the same components.

In this embodiment, as shown in FIG. 1, the plate-like pad spring 11 has a substantially U-shaped channel shape, and its web portion 11a has a curved portion protruding toward the inside of the channel. Shape. 11b is an outer flange portion, 11c is an inner flange portion, 11d is a top portion on the outer circumference side, and 11e is a top portion on the inner circumference side.

Further, as shown in FIG.
Notches 11f, 11g, 1 at appropriate intervals in the middle of c
1h, and the end portions of the two tongue pieces formed thereby are bent at positions recessed from the inner flange portion 11c so as to engage with the engaging portions 2e of the arm portions 2a, and the intermediate hooks are provided. A claw 11i is formed, and this pad spring 11 is provided so as to cover the inner surface of the engaging groove 7c of the engaging portion 2e of the arm 2a as shown in FIG.

FIG. 3 shows a second embodiment of the present invention. The pad spring 12 has a substantially U-shaped channel shape and a web portion 12a.
The two chevrons 12 projecting toward the inside of the channel
b and 12c are formed, 12d is an outer flange portion,
12e is an inner flange portion, 12f is a top portion on the outer peripheral side,
g is the middle top, 12h is the top on the inner circumference side, and the mounting method is the same as that of the first embodiment.

[0019]

Effects of the Invention The pad springs 11 and 12 of the present invention configured as described above apply the acting force to the pads in the circumferential direction of the rotor (each of the tops 11d and 11e or 12f and 12f and 12f).
g, 12h) are two or more points including the inner and outer sides of the rotor in the engagement groove between the pad and the arm, whereby the swing of the pad in the rotor axial direction is regulated, and the rattle noise is suppressed. And brake squeal can be prevented from occurring.

The pad springs 11 and 12 of the present invention are also provided.
Is determined only by the dimensional relationship between the engaging portion of the torque receiving member 2 and the engaging groove of the pad. Can be reduced, so that the acting force can be set low. Therefore, according to the present invention, the sliding resistance of the pad in the rotor axis direction can be reduced, and the effect that the delay of the braking effect and the poor return of the pad can be prevented can be obtained.

The pad springs 11 and 12 of the present invention are also provided.
The cross-sectional shape of the portion that covers the inner peripheral surface of the engagement groove is formed in a substantially U-shape, and there is no extension 9b unlike the conventional pad spring 9 shown in FIG. If this is the case, it is possible to reduce the size and weight and also to obtain the effect that the assemblability becomes easy.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view of a disc brake showing a mounted state of a pad spring of the present invention.

FIG. 2 is a perspective view of the pad spring of FIG. 1;

FIG. 3 is a partial cross-sectional view of a brake showing a mounted state of a pad spring according to another embodiment of the present invention.

FIG. 4 is an elevational view showing a pad mounting portion of a conventional disc brake in a partial cross section.

FIG. 5 is a plan view of FIG. 4;

FIG. 6 is a sectional view taken along line AA of FIG. 4;

FIG. 7 is a partial cross-sectional view showing a mounted state of a conventional pad spring.

FIG. 8 is a perspective view of a conventional pad spring.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotor 2 Torque receiving member 2a, 2b Arm part 2c, 2d Relief groove 2e Engaging part 3, 4 Guide pin 5 Caliper 5a Actuator part 5b Reaction part 5c Parking brake device part 5d Cylinder 6 Piston 7, 8 Pad 7a, 8a Back Plates 7b, 8b Lining 7c, 8c Engagement groove 7d, 8d Hook groove 9 Pad spring 9a Main body 9b Extension 9c Placement 9d Hanging part 9e Lower claw 9f Intermediate hook 10 Retraction spring 11 Pad spring 11a Web Part 11b Outer flange part 11c Inner flange part 11d Outer peripheral top part 11e Inner peripheral side top part 11f, 11g, 11h Notch 11i Intermediate latching claw 12 Pad spring 12a Web part 12b, 12c Angle 12d Outer flange part 12e Inner flange part 12 f Top of outer circumference 12g Middle top 12h Top of inner circumference

Claims (2)

(57) [Scope of request for utility model registration] An arm parallel to a rotor axis is provided on both sides of a torque receiving member, and a pair of pads frictionally engaged with both sides of a rotor are mounted between the two arms, and the opposite arms are provided. In a disk brake in which a pad is slidable by interposing a plate-shaped pad spring at an engagement portion with the pad, the pad spring has a substantially U-shaped channel shape in cross section, and its web portion is provided inside the channel. A pad spring for a disc brake, wherein the pad spring has a curved shape protruding toward the outside, and the pad spring is provided so as to cover an inner surface of an engagement groove of the engagement portion. 2. The pad spring according to claim 1, wherein the cross-sectional shape of the pad spring is substantially U-shaped channel shape, and two or more peaks protruding toward the inside of the channel are formed on the web portion thereof. Disc brake pad spring.