JPH064436U - Disk brake retainer and pad spring for vehicles - Google Patents

Abstract

(57) [Summary] [Purpose] To allow the caliper body and friction pads to move naturally. Do not apply excessive pressure to the friction pad as much as possible. Smoothly move the friction pad during braking. [Structure] Pad spring portion 12a and retainer portion 12
b is connected to a flexible portion 12c that bulges outward in a loop shape to form the retainer / pad spring 12. The pad spring portion 12a is a belt-shaped body engaging portion 12e which is continuous with one end of the bending portion 12c, and the body engaging portion 12e.
It is composed of a pair of pad contacting pieces 12f, 12f projecting away from each other substantially from the center. The body engaging portion 12e is inserted into the inner wall from the side portion of the bridge portion, the pad contacting pieces 12f and 12f are pressed against the outer surface of the back plate, and the locking tongue piece 12d is engaged with the rotor groove of the caliper support arm. Let The retainer pieces 12h and 12h are laid on the pad guide portion. The loop-shaped bending portion 12c is arranged in the gap between the bridge portion and the caliper support arm.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a disc brake mounted on a vehicle such as a four-wheeled vehicle, and more specifically, to a retainer portion that guides the movement of the friction pad in the disc axial direction and a pad that similarly repels the friction pad toward the disc center. The present invention relates to a retainer / pad spring integrally provided with a spring portion.

[0002]

[Prior art]

 An example of a retainer / pad spring used for a vehicle disc brake is disclosed in Japanese Utility Model Publication No. 62-25550.

In this retainer / pad spring, an S-shaped bent portion is formed on a plate material, and one protrusion of the bent portion is used as a pad contact portion, and one side end connected to the pad contact portion is formed. As a body engaging portion by extending in a direction orthogonal to the longitudinal direction of the bent portion, and the body engaging portion and the pad contact portion constitute a pad spring portion and A part of the other side end connected to the other ridge is extended in the direction orthogonal to the longitudinal direction of the bent portion from the front side of the terminal end of the side end to form the locking tongue piece, and the other side end is formed. The other part of the end is the retainer part.

The retainer / pad spring formed in this manner bends the locking tongue toward the retainer portion and elastically contacts the rotor groove recessed inside the caliper support arm so that the retainer portion is retained. , Between the pad guide portion of the caliper support arm and the outer end surface of the ear piece of the back plate of the friction pad with a deforming force superior to the elastic force of the locking tongue, and the tip of this retainer portion, While contacting either one of the pad guide portion and the friction pad, the base end portion of the retainer portion is brought into contact with the other, and further the body engaging portion is arranged in the circumferential direction of the disc rotor. It is attached by engaging with the inner wall of the bridge portion of the caliper body and bringing the pad contacting portion into contact with the outer surface of the ear piece of the back plate.

[0005]

[Problems to be solved by the device]

 However, in the above-mentioned retainer / pad spring, since both pad contact portions are provided by utilizing the highly rigid S-shaped bent portion, the body engagement portion and both pad contact portions are Movements are always integrated and there is no flexibility to accommodate the individual movements of the caliper bodies and friction pads with which they engage or abut.

For example, when the caliper body moves toward the center of the disc and the gap between the bridge portion and the friction pad is narrowed, the body engaging portion and the pad abutting portion are compressed and deformed. The pad abutting part presses both friction pads toward the center of the disc with the same force. This action is based on the principle of leverage, with the body engaging portion acting as the force point, the pad contacting portion acting as the action point, and the retainer periphery as the apparent fulcrum, the caliper body acting on the body engaging portion. The pressing force is transmitted from the pad contact portion to the friction pad as an excessive pressing force. For this reason, the friction pad is more strongly restrained in the disc center direction, and the friction pad cannot move smoothly in the disc axial direction during braking.

In view of this, the present invention allows the caliper body and the friction pad to individually move naturally, and in particular prevents the friction pad from being subjected to excessive pressing force as much as possible, so that the friction pad moves smoothly during braking. The purpose is to provide a retainer and pad spring that can be used.

[0008]

[Means for Solving the Problems]

 In accordance with the above-mentioned object, the present invention provides a pair of friction pads arranged on both sides of a disc rotor so as to elastically spring from the inside of a bridge portion of a caliper body toward a disc center and both side portions of the bridge portion. The pad guide portion provided on the caliper support arm straddling the outer side of the disc rotor with the pinch sandwiched between the retainer portion and the retainer portion that supports the ear piece protruding to the side portion of the back plate of the friction pad. In a retainer / pad spring for a vehicle disc brake, the pad spring portion is protruded from the body engaging portion that engages with the inner wall of the bridge portion and away from the body engaging portion in the disc axial direction. Each of the friction pads is configured with a pair of pad abutting pieces that elastically spring independently of each other, and the body engaging portion and the retainer portion are connected to each other. Tsu bulging looped into between the caliper supporting arm di unit, and is characterized in that the previous SL was connected by flexure of the elastic to allow the behavior of the body engagement portion.

[0009]

[Action]

 In the above-mentioned configuration, both pad contacting parts are independent on both sides of the body engaging part, and the body engaging part has a shape in which the parts other than the connecting part are separated, so that the actions of these three parts are mutually exclusive. Less likely to be affected.

For example, when the caliper body moves toward the center of the disk and the gap between the bridge portion and the friction pad is narrowed, the body engagement portion moves closer to the friction pad while deforming the bending portion. , The pad abutment pieces press the friction pads, but the pad abutment pieces are pushed away by the reaction force of the friction pads while opening in a V shape around the body engaging portion. Therefore, the pressing force exerted on the friction pad, which exceeds the preset value, is reduced by the deformation of the pad contacting piece. Also, when the friction pad tries to float outward in the disc half-diameter direction by the braking reaction force, the pad contacting piece bends and absorbs an excessive elastic force.

The behaviors of the body engaging portion and the pad abutment piece allow the flexure portion between the body engaging portion and the pad abutment piece to deform, and the behaviors of the body engaging portion and the pad abutment piece are the same. Is not transmitted to.

[0012]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

The disc brake 1 includes a disc rotor 2 rotating in the direction of arrow A, a caliper bracket 3 fixed to the vehicle body at one side of the disc rotor 2, and caliper support arms 3 a, 3 a of the caliper bracket 3. In addition, the caliper body 6 guided in the disc axial direction via the pair of sliding pins 4 and 5, and the pair of frictions pressed against the side surface of the disc rotor 2 by the movement of the caliper body 6. It consists of pads 7 and 7.

The caliper support arms 3 a, 3 a are extended from the caliper bracket 3 so as to sandwich the bridge portion 6 c of the caliper body 6 that straddles the outside of the disc rotor 2. The caliper support arms 3a, 3a are provided with the above-mentioned sliding pins 4, 5 in a protruding manner. The caliper body 6 inserts these sliding pins 4, 5 into the vehicle body mounting arms 6d, 6d, It is movably supported in the disc axial direction. Stepped pad guides 3b, 3b for suspending the friction pads 7, 7 are provided facing each other on the opposing surfaces of the caliper support arms 3a, 3a, and the center of the inner wall of each caliper support arm 3a is provided. A rotor groove 3c for accommodating the disk rotor 2 is recessed.

The caliper body 6 straddles the outside of the disc rotor 2 and the action portion 6 a provided on one side of the disc rotor 2, the reaction portion 6 b provided on the other side of the disc rotor 2. And the above-mentioned bridge portion 6c for connecting them. The action portion 6a is provided with a cylinder hole 8 which is open on the side of the disc rotor 2, and the vehicle body mounting arms 6d and 6d are provided on both sides thereof so as to project therefrom. The cylinder hole 8 accommodates a cylindrical piston 9 having a bottom, and the piston 9 moves the cylinder hole 8 by the pressure liquid supplied to the hydraulic chamber defined at the bottom of the cylinder hole 8. Move in the direction of the disk rotor.

The friction pads 7, 7 are arranged so as to face each other with the disc rotor 2 interposed between the action portion 6 a and the reaction portion 6 b. Each friction pad 7 is formed by joining a lining 10 that is in sliding contact with the disc rotor 2 and a back plate 11 held by the caliper support arms 3a and 3a. Ear pieces 11a, 11a are provided on both sides of the back plate 11, and the rubbing pad 7 attaches these ear pieces 10a, 10a to the pad guide portions 3b, 3b, respectively, and retainer / pad spring 12 respectively. It is supported movably in the disc axial direction via.

In the retainer / pad spring 12, one ends of the pad spring part 12a and the retainer part 12b are butted against each other at a substantially right angle, and the one ends are connected to each other by a flexible part 12c that bulges outward in a loop shape. The retainer portion 12b has a shape in which a locking tongue piece 12d is projected in a direction opposite to the pad spring portion 12a at the center, and an elastic plate material is used as the material.

The pad spring portion 12a protrudes from a strip-shaped body engaging portion 12e connected to one end of the bending portion 12c and substantially the center of both side portions of the body engaging portion 12e so as to be separated from each other while being slightly curved. It is composed of a pair of pad contact pieces 12f, 12f. In addition, the retainer portion 12b includes a connecting piece 12g extending from both sides of the other end of the bending portion 12c in a direction intersecting with the bending portion 12c, and a pair of retainer pieces 12h extending from both lower edges of the connecting piece 12g in an L shape. , 12h.

In each of the retainer / pad springs 12 formed as described above, the body engaging portion 12e of the pad spring portion 12a is inserted from the side portion of the bridge portion 6c into the inner wall, and both pad contacting pieces 12f are inserted. , 12f are pressed against the outer surfaces of the back plates 11, 11 to engage the locking tongue piece 12d with the rotor groove 3c of the caliper support arm 3a, and the retainer pieces 12h, 12h are connected with the pad guide portion 3b. It can be installed by laying on. Further, the loop-shaped bending portion 12c is arranged in the gap between the bridge portion 6c and the caliper support arm 3a.

By this attachment, the friction pads 7 and 7 are respectively moved toward the center of the disc by the body engaging portion 12e and the pad contacting pieces 12f and 12f which are contracted between the back plate 11 and the bridge portion 6c. The retainer pieces 12h and 12h which are independently repulsed and laid on the pad guide portion 3b smoothly guide the movement in the disc axial direction. The pad abutment piece 12f is inclined so as to gradually approach the bridge portion 6c toward the tip, and during braking, the friction pad 7 pushes the pad abutment piece 12f outward with the back plate 11 and pushes the pad abutment piece 12f outwardly. The pad contacting piece 12f, which returns to its original shape in the disk center direction when the braking is released, pushes the back plate 11 away from the disk rotor 2 due to its inclined shape. Then, the friction pad 7 is separated from the disc rotor 2 to prevent the lining 10 from being dragged.

In the present embodiment, as described above, the two pad contacting pieces 12f and 12f formed on the retainer / pad spring 12 are independent on both sides of the body engaging portion 12e, and the body engaging portion 12e is independent. The part 12e also has a shape in which three sides other than the connecting part are separated.

Therefore, when the caliper body 6 moves toward the center of the disk and the gap between the bridge portion 6c and the friction pads 7 and 7 is narrowed, the body engaging portion 12e moves to the friction pads 7 and 7. And both pad contacting pieces 12f, 12f press the friction pads 7, 7 more strongly than the set load, but these pad contacting pieces 12f, 12f are caused by the reaction force of the friction pads 7, 7 Since the body engaging portion 12e is pushed away while opening in a V shape around the body engaging portion, the pushing force exerted on the friction pads 7 or more than a preset value is reduced by the deformation of the pad contacting pieces 12f, 12f. . Further, even when the friction pads 7, 7 try to float outward in the radial direction of the disc due to the sliding contact with the disc rotor 2, the pad contacting pieces 12f, 12f are bent to absorb an excessive elastic force. . Therefore, in any case, the friction pads 7, 7 can be smoothly moved in the disc axial direction.

The above-described behaviors of the body engaging portion 12e and the pad contacting pieces 12f, 12f are such that the loop shape of the bending portion 12c is deformed and this is allowed. The behavior of the pieces 12f and 12f is not transmitted to the retainer portion 12b.

As described above, in the present embodiment, the pad contacting pieces 12f and 12f have a shape that makes it easy to move individually with respect to the body engaging portion 12e even when the pad spring portion 12a is compressed. Therefore, even if a load larger than the set value is generated, the load is damped so as not to be transmitted to the friction pads 7, 7 as much as possible. Therefore, the movement of the friction pads 7, 7 guided by the pad guide portion 3b is prevented. It will not interfere with.

Further, since the pad contacting pieces 12f, 12f are provided separately on both sides of the body engaging portion 12e, the behavior of one of the friction pads 7, 7 is less likely to be transmitted to the other, so that the friction pads are separated from each other. Does not interfere with natural movement.

[0026]

[Effect of device]

 The retainer / pad spring according to the present invention has a body engaging portion that engages with the inner wall of the bridge portion and a body engaging portion that protrudes from the body engaging portion so as to be separated from each other in the disc axial direction. The pad spring part is composed of a pair of pad abutting pieces that elastically springs, and the body engaging part and the retainer part laid on the pad guide part of the caliper support arm are connected to the caliper body bridge part and the caliper support part. By forming a loop-shaped bulge between the caliper body and the friction pad, the elastic body allows the behavior of the body engaging portion to be connected to each other. Further, since the pressing force more than necessary does not act on the friction pad as much as possible, the friction pad can be smoothly moved during damping.

[Brief description of drawings]

FIG. 1 is a perspective view of a retainer / pad spring according to an embodiment of the present invention.

2 is a partial cross-sectional plan view in which the retainer / pad spring of FIG. 1 is used for a disc brake.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is an enlarged view of a main part of FIG.

5 is a sectional view taken along line VV of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Disc brake 2 ... Disc rotor 3 ... Caliper bracket 3a ... Caliper support arm 3b ... Pad guide part 3c ... Rotor groove 6 ... Caliper body 6a ... Working part 6b ... Reaction part 6c ... Bridge part 7 ... Friction pad 10 ... Lining 11 ... Back plate 11a ... Ear piece 12 ... Retainer / pad spring 12a ... Pad spring part 12b ... Retainer part 12c ... Deflection part 12d ... Locking tongue piece 12e ... Body engaging part 12f ... Pad contacting part 12g ... connecting piece 12h ... retainer piece

Claims (1)

[Scope of utility model registration request] 1. A pair of friction pads disposed opposite to each other on both sides of a disc rotor are sandwiched between a pad spring portion elastically springing from the inside of a bridge portion of a caliper body toward a disc center and both side portions of the bridge portion. A pad guide portion provided on a caliper support arm that straddles the outer side of the disc rotor, and a retainer / pad for a disc brake for a vehicle integrally provided with a retainer portion that supports an ear piece projecting to a side portion of the back plate of the friction pad. In the spring, the pad spring portion is protruded from the body engaging portion that engages with the inner wall of the bridge portion so as to be separated from the body engaging portion in the disc axial direction, and each of the friction pads is independent. A pair of pad abutting pieces that are elastically ejected, the body engaging portion and the retainer portion, and the bridge portion and the caliper. A retainer / pad spring for a vehicle disc brake, which bulges in a loop shape to a support arm and is connected by an elastic bending portion that allows the behavior of the body engaging portion.