JPH0680034U - Vehicle disc brake pad retainer - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To make it easy to assemble the friction pad from the disc rotor side of the pad guide. [Structure] The pad retainer 13 has an inner receiving piece 13d and an outer receiving piece 13e facing inward and outward in the radial direction of the disk.
And an elastic loop portion 13g that is bent back near the inside of the inner receiving piece 13d, a pad elastic piece 13h is provided in parallel with both receiving pieces 13d and 13e, and the outer side of the inner receiving piece 13d intersects diagonally. The insertion guide piece 13j is projected. In addition, the pad elastic piece 13h is formed in a predetermined length,
The distance C2 between the elastic piece 13h and the outer receiving piece 13e is set to be equal to or slightly smaller than the length L, and the inner and outer receiving pieces 1
The interval C1 of 3d and 13e is set wider than the length L.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a disk brake for a vehicle used in a vehicle such as an automobile or a motorcycle, and more particularly, to a structure of a pad retainer that supports a back plate ear piece of a friction pad by a pad guide portion of a caliper support arm. .

[0002]

[Prior art]

 Ear lugs are projected on both sides of the back plate of the friction pad, and both ears are supported by the pad guides formed opposite to the pair of caliper support arms to suspend the friction pad so that it can move in the disc axial direction. In the disc brakes we have, a pad retainer made of a thin plate such as stainless steel is laid in the pad guide part, and the ear piece is supported through the pad retainer so that the friction pad can move smoothly. As an example thereof, there is one disclosed in Japanese Utility Model Publication No. 60-21559.

The pad guide portion used for the above-mentioned disc brake has a so-called upper jaw that is provided with a protruding piece that prevents the friction pad from rising and coming off, and the friction pad cannot be inserted / removed in the disk radial direction. The friction pad is designed to be inserted from the side opposite to the disc rotor into the pad guide section where the pad retainer is laid.

On the other hand, the pad retainer includes an inner piece and an outer receiving piece that face each other, a band-shaped side piece that connects them, and an elastic loop portion that protrudes outward from one end of the inner piece and is folded back to the inner side of the inner piece. And a pad elastic piece extending from the tip of the elastic loop portion between the inner piece and the outer receiving piece.

In the pad retainer described above, the outer receiving piece and the inner piece are laid on the upper surface and the lower surface of the pad guide portion, the side pieces are laid on the inner surface of the back wall of the pad guide portion, and the elastic loop portion is The ear piece of the friction pad is arranged so as to project to the side opposite to the disc rotor of the pad guide section. It is inserted between the pieces.

[0006]

[Problems to be solved by the device]

 However, in the above-mentioned assembly from the side opposite to the disc rotor, there is almost no gap between the caliper body and the caliper bracket for gripping the friction pad, and the elastic loop portion is the opposite between the outer receiving piece and the inner piece. Since it protrudes to the disc rotor side, the ear piece tilts from the beginning when it comes into contact with the elastic loop portion, making it difficult to insert the friction pad. Also, since the pad elastic piece is inclined toward the outer receiving piece, the eccentric load on the friction pad gradually increases, which makes it more difficult to insert the pad inward, and the friction pad is set in a tilted state. There is a risk of being lost.

Therefore, a skillful technique of urging the friction pad in the direction opposite to the inclination and inserting the urging force while adjusting the urging force is required. Had to rely on time-consuming manual work, which was one of the factors behind the automation of the friction pad assembly.

The present invention has been made in view of such circumstances, and an object of the present invention is to easily assemble a friction pad in a short time without requiring any special technique. Another object of the present invention is to provide a pad retainer suitable for automatic assembly by a machine.

[0009]

[Problems to be solved by the device]

 In accordance with the above-mentioned object, the present invention has a pair of caliper support arms extending from the outside of the disc rotor in the axial direction of the disc, to the caliper bracket fixed to the vehicle body, and the caliper support arms are provided so as to face each other. In the disc brake for vehicles that lays a pad retainer on the pad guide part and supports the ear pieces protruding to both sides of the back plate of the friction pad, the ear pieces of the back plate are sandwiched between the pad retainer and the disc retainer. The inner receiving piece and the outer receiving piece facing inward and outward in the radial direction and the pad elastic piece arranged near the disk rotor between the inner receiving piece and the outer receiving piece are provided, and the inner receiving piece and the outer receiving piece are provided. And the pad elastic piece are arranged in parallel with the disk axis, and the difference between the pad elastic piece and the end of the pad elastic piece on the side opposite to the disk rotor while projecting while inclining toward one of the receiving pieces. And a gap between the inner receiving piece and the outer receiving piece is set to be wider than the length of the ear piece in the radial direction of the disc, and the inner receiving piece or the outer receiving piece is connected to the other side. It is characterized in that the distance from the pad firing piece is set to be equal to or smaller than the length of the ear piece in the disk radial direction.

[0010]

[Action]

 Inside the pad retainer, there is a set space on the disc rotor side that holds the inner side surface and the outer side surface of the ear piece, and a wider space than the ear piece, with the pad elastic piece and the receiving piece facing it. It is divided into a temporary storage space on the side opposite to the disk rotor, which consists of internal and external receiving pieces.

In the temporary storage space on the insertion side, the friction pad can be temporarily placed, the friction pad can be picked up again by manual assembly, and the chuck and push-in tool can be replaced by automatic assembly by machine. .

When the friction pad is inserted from this temporarily placed state, either the inner surface or the outer surface of the ear piece enters the disc rotor side while sliding on the insertion guide piece, and in the set space. , The ear piece is sandwiched between the other one of the inner receiving piece and the outer receiving piece and the pad firing piece, and the friction pad is set.

The ear piece of the friction pad tilts on the insertion guide piece, but since the other side surface of the ear piece contacts and is guided by the other guide piece, the friction pad is prevented from falling.

The ear piece in the set space is held in contact with either the inner side piece or the outer side piece or the other side and the pad elastic piece with the inner and outer side surfaces, and the friction pad is held against the side surface of the disc rotor. Suspended in parallel.

[0015]

【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 that rotates integrally with wheels, 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. The caliper body 5 is movably supported in the disc axial direction via the pair of slide pins 4 and 4, and the disc rotor 2 is sandwiched between the working portion 5a and the reaction portion 5b of the body 5. It is composed of a pair of friction pads 6 and 6 arranged to face each other.

The caliper body 5 is composed of the above-mentioned action portion 5 a and reaction portion 5 b which are arranged on both sides of the disc rotor 2, and a bridge portion 5 c which connects them to the outside of the disc rotor 2. . The action portion 5a is provided with a cylinder hole 7 having an opening on the side of the disk rotor 2, and a cylindrical piston 8 having a bottom is housed in the cylinder hole 7. The piston 8 has a hydraulic pressure at the bottom of the cylinder hole. The cylinder hole 7 is moved toward the disk rotor by the pressure liquid supplied to the chamber 9. Further, vehicle body mounting arms 5d and 5d are provided on the side portions of the action portion 5a, and the above-mentioned slide pins 4 are provided on the tip ends of the vehicle body mounting arms 5d by the mounting bolts 10, respectively. ing.

The caliper support arms 3 a, 3 a straddle the outside of the disc rotor 2 in the disc axial direction from both sides of the caliper bracket 3 while sandwiching both sides of the bridge portion 5 c, and further on the other side of the disc rotor 2. It has a shape extending along the side wall of the reaction portion 5b toward the center of the disk. The tip ends of the caliper support arms 3a, 3a are connected by a tie rod 3b to enhance the rigidity of both support arms 3a, 3a to which a braking torque is applied.

Each caliper support arm 3a is provided with a guide hole 3c for accommodating the above-mentioned slide pin 4, and both caliper support arms 3a, 3a are provided on the respective side portions of the disc rotor 2. Four pad guide portions 3d facing each other are provided. Each pad guide portion 3d has an upper jaw having a protruding piece 3e on the outer side, and each friction pad 6 includes ear pieces 11a and 11a protruding on both sides of the back plate 11 on the disk entry side and the ejection side pad. It is inserted into the guide portions 3d, 3d from the side opposite to the disc rotor, and is supported by the pad guide portions 3d, 3d via the pad retainer 13.

The pad retainer 13 straddles the outer side of the disc rotor 2 and a pair of retainer portions 13 a, 13 a laid on the pad guide portions 3 d, 3 d on both sides of the disc rotor on the disc entry side or the delivery side. , The connecting piece 13b connecting the upper portions of the retainer parts 13a, 13a, and the connecting piece 13b protruding from the central portion of the connecting piece 13b in the opposite direction to the retainer parts 13a, 13a and locked in the rotor groove 3f of the caliper support arm 3a. Mounting piece 13c.

Further, each retainer portion 13a includes an inner receiving piece 13d and an outer receiving piece 13e facing inward and outward in the disk radial direction, a side piece 13f connecting these pieces 13d and 13e, and an outer receiving piece 13e close to the disk rotor. From the outside toward the caliper body 5 and further bent back toward the inside of the outer receiving piece 13e, the pair of elastic loop portions 13g and 13g, and the inner receiving pieces 13d and 13d at the tips of the elastic loop portions 13g and 13g. And an outer receiving piece 13e and a pad elastic piece 13h extending in parallel.

The inner receiving piece 13d, the outer receiving piece 13e, and the side piece 13f are formed to have substantially the same length in the disc axial direction, and the distance C1 between the inner and outer receiving pieces 13d and 13e is equal to that of the ear piece 11a. It is set wider than the length L in the radial direction of the disc. The pad elastic piece 13h is formed with a length sufficient to move from the disk rotor end of the outer receiving piece 13e to the ear piece 11a of the friction pad 6 until the lining 12 is completely worn. The distance C2 between the pad elastic piece 13h and the outer receiving piece 13e is set to be equal to or slightly smaller than the length L of the ear piece 11a in the disk radial direction.

The portion surrounded by the pad resilient piece 13h, the inner receiving piece 13d on the side opposite to the disc rotor, the outer receiving piece 13e, and the side piece 13f in a U-shape serves as a temporary placement space for the ear piece 11a. The facing portion of the pad elastic piece 13h and the outer receiving piece 13e is a set space for the ear piece 11a.

Insertion guide pieces 13i are provided at the ends of the inner and outer receiving pieces 13d and 13e and the side pieces 13f on the side opposite to the disk rotor side, respectively, and the ear pieces 11a of the friction pad 6 are connected to the above-mentioned case. It can be easily inserted into the temporary storage space. Further, on the side opposite to the disc rotor of the pad projecting piece 13h, an insertion guide piece 13j which obliquely intersects the outside of the inner receiving piece 13d is provided so as to project, and the ear piece 11a inserted into the temporary storage space. Is further guided to above the pad firing piece 13h.

In the retainer portion 13a, an inner receiving piece 13d and an outer receiving piece 13e are laid on the upper surface and the lower surface of the pad guide portion 3d, respectively, and a side piece 13f is laid on the inner surface of the back wall of the pad guide portion 3d. Further, the pad elastic piece 13h projects from the pad guide portion 3d to the caliper body 5 side and is arranged in parallel with the disc axis together with the inner receiving piece 13d and the outer receiving piece 13e.

The present embodiment is configured as described above, and the friction pad 6 has the ear pieces 11a and 11a of the back plate 11 on the respective side portions of the disc rotor 2 for turning the disc in and out. It is inserted into the pad guide portions 3d, 3d from the side opposite to the disc rotor. In the temporary placement space of the pad retainer 13 on the insertion side into the pad guide portion 3d, the inner side surface of the ear piece 11a is supported by the inner receiving piece 13d (imaginary line in FIG. 1).

In the above-mentioned temporary storage space, the inner and outer receiving pieces 13d and 13e are wider than the ear piece 11a, and there is a margin between the outer surface of the ear piece 11a and the outer receiving piece 13e. In addition to being easy to insert, the friction pad 6 can be temporarily placed, allowing the friction pad 6 to be picked up again by manual assembly, and replacing the magnet chuck with a pushing member in assembly by machine. can do.

When the ear piece 11a is pushed in from the temporary placement space, the guide surface that supports the inner side surface of the ear piece 11a is replaced with the insertion guide piece 13j from the inner receiving piece 13d, and the inner side surface of the ear piece 11a moves. While slipping on the insertion guide piece 13j, approach the pad ejection piece 13h side.

Since the insertion guide piece 13j is inclined toward the inner receiving piece 13d as described above, the ear piece 11a on the insertion guide piece 13j is inclined at the same angle as the insertion guide piece 13j. The distance between the piece 13j and the outer receiving piece 13e becomes gradually narrower as it approaches the disc rotor 2, so that the outer side surface of the inclined ear piece 11a comes into contact with the outer receiving piece 13e and is guided. The rubbing of the friction pad 6 is prevented.

When the distance C2 between the pad elastic piece 13h and the outer receiving piece 13e is narrower than the length L of the ear piece 11a in the disk radial direction, the outer surface of the ear piece 11a is the outer receiving piece 13e. As soon as it comes into contact with the insertion guide piece 13j and approaches the pad ejection piece 13h on the insertion guide piece 13j, it pushes the insertion guide piece 13j and the pad ejection piece 13h toward the center of the disc to enter.

The ear piece 11a, which has passed over the insertion guide piece 13j, reaches the pad elastic piece 13h, which is the set space, and enters while being sandwiched between the pad elastic piece 13h and the outer receiving piece 13e. The position where the lining 12 comes into contact with the side surface of the disc rotor 2 and receives a reaction force to stop the pushing is the set position of the friction pad 6.

When the space between the pad elastic piece 13h and the outer receiving piece 13e is narrower than the ear piece 11a, the ear piece 11a elastically holds the pad elastic piece 13h with an appropriate elastic force. Be done. When the lining 12 of the friction pad 6 is new, the ear piece 11a is located on the outermost side of the set space, as shown by the solid line in FIG.

The friction pad 6 is thus assembled to the set pace of the pad guide portion 3d and is hung parallel to the side surface of the disc rotor 2, and the ear piece 11a is padded by a braking operation. It reciprocates in the axial direction of the disc between the elastic piece 13h and the outer receiving piece 13e.

In the above embodiment, the pad guide portion is described with the upper jaw, but the pad retainer of the present invention can be applied to the stepped pad guide portion without the upper jaw. In addition, the pad elastic part may be provided on the side of the outer receiving part, and if the receiving part on the side where the pad elastic part is arranged is further cut into and the accommodating guide piece is accommodated, the pad elastic part will be inside and outside. Can be disposed between the receiving pieces of the.

[0035]

[Effect of device]

 As described above, according to the present invention, the set space on the disc rotor side that holds the inner surface and the outer surface of the ear piece by the pad resilient piece and one receiving piece inside the pad retainer and the ear piece. It is separated from the temporary storage space on the side opposite the disc rotor with a wider space than that of the disk rotor, and the guide pieces that are inclined between the two spaces guide the ears well from the temporary storage space to the set space. As a result, the rubbing pad will not fall over during assembly or tilted to the set position.

In addition, since the friction pad can be temporarily placed in the temporary storage space and the friction pad can be picked up again by manual assembling, no special skill is required for the operator, and the friction pad can be used by anyone. However, it can be easily assembled in a short time. Furthermore, in this temporary storage space, chucks and pushing tools can be replaced, so that automatic assembly by a machine is possible.

[Brief description of drawings]

FIG. 1 is a sectional view taken along line I-I of FIG.

FIG. 2 is a partially cutaway plan view of a disc brake according to an embodiment of the present invention.

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

4 is a sectional view taken along the line IV-IV in FIG.

FIG. 5 is a perspective view of a pad retainer.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Disc brake 2 ... Disc rotor 3 ... Caliper bracket 3a ... Caliper support arm 3d ... Pad guide part 3e ... Projection piece 3f ... Rotor groove 5 ... Caliper body 6 ... Friction pad 13 ... Pad retainer 13a ... Retainer portion 13b ... Coupling piece 13c ... Mounting piece 13d ... Inner receiving piece 13e ... Outer receiving piece 13f ... Side piece 13g ... Elastic loop portion 13h ... Pad elastic piece 13i ... Inner receiving piece 13d, Outer receiving piece 13e and Side piece 1
Insertion guide piece 13j formed on 3f ... Insertion guide piece C1 that diagonally intersects the outside of inner receiving piece 13d C1 ... Distance between inner receiving piece 13d and outer receiving piece 13e C2 ... Pad elastic piece 13h and outer receiving piece Distance from the piece 13e L ... Length of the ear piece 11a in the disk radial direction

Claims (1)

[Scope of utility model registration request] 1. A pair of caliper support arms extending over the outside of a disk rotor in the disk axial direction is extended to a caliper bracket fixed to a vehicle body, and a pad guide portion is provided opposite to both caliper support arms. In a disc brake for a vehicle in which a pad retainer is laid to support ear pieces projecting on both sides of a back plate of a friction pad, an inner support facing the pad retainer inward and outward in the radial direction of the disc with the ear piece of the back plate interposed therebetween. A piece and an outer receiving piece, and a pad elastic piece arranged near the disc rotor between the inner receiving piece and the outer receiving piece. The inner receiving piece, the outer receiving piece, and the pad elastic piece are provided as a disk. An insertion guide piece that is arranged parallel to the shaft and that projects while inclining toward one of the receiving pieces is formed at the end of the pad elastic piece opposite to the disk rotor. , The gap between the inner receiving piece and the outer receiving piece is set to be wider than the length of the ear piece in the disk radial direction, and the distance between the other of the inner receiving piece and the outer receiving piece and the pad elastic piece Is also set to be equal to or narrower than the length of the ear piece in the disk radial direction, the pad retainer for a vehicle disk brake.