JPH0684033U - Disc brakes for vehicles - Google Patents

Abstract

(57) [Abstract] [Purpose] The friction pad can be easily replaced while ensuring the rigidity of the bridge portion where the ceiling opening is formed. [Structure] An insertion hole 9d is formed in a rigid reinforcing member 9 that is installed in a ceiling opening 8 of a caliper body 3, a hanger pin 11 is inserted into the insertion hole 9d, and the hanger pin 11 is attached to the rigid reinforcing member 9. A part of the hanger pin 11 is exposed from the rigid reinforcing member 9, and the back plate 4 of the friction pads 4 and 4 is exposed on the exposed portions 11b and 11b.
Insert b and 4b.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a disc brake used in various traveling vehicles such as automobiles and motorcycles, and more particularly to a disc brake having a structure in which a bridge portion of a caliper body has a ceiling opening for inserting and removing a friction pad. .

[0002]

[Prior art]

 As a so-called open top type disc brake in which a pair of friction pads arranged on both sides of the disc rotor are inserted and removed through a ceiling opening formed in a bridge portion of a caliper body, for example, it is shown in Japanese Patent Publication No. 36-3204. There is something left.

A friction pad used for the disc brake is movably held in the disc axial direction by a torque receiving portion of the friction pad formed on the caliper body and a friction pad support piece formed on the bracket. It is designed to be inserted and removed through a rectangular ceiling opening formed in the bridge part of the caliper body. At the center of the ceiling opening, a structural reinforcing member is removably mounted with mounting bolts. The reinforcing member secures the rigidity of the bridge and prevents the friction pad placed inside from being pulled out. is doing.

[0004]

[Problems to be solved by the device]

 However, in the above-mentioned one, when replacing the friction pads, after loosening the mounting bolts and removing the stiffening members from the ceiling opening, pull out the friction pads one by one and replace the new friction pads one by one. It had to be attached and the rigid reinforcement member had to be attached to the ceiling opening, which was troublesome to put on and take off.

Therefore, an object of the present invention is to provide a disc brake for a vehicle in which the friction pad can be easily replaced while ensuring the rigidity of the bridge portion in which the ceiling opening is formed.

[0006]

[Means for Solving the Problems]

 To achieve the above object, the vehicle disc brake of the present invention has a ceiling opening formed in the bridge portion of the caliper body disposed outside the disc rotor, and the ceiling opening is formed in the disc axial direction. Friction pads, which are arranged opposite to each other on the both sides of the disc rotor, are hung on straddling hanger pins, and rigidity is provided in the axial direction of the disc in the ceiling opening. An insertion hole is formed in the reinforcing member, the hanger pin is inserted into the insertion hole, the hanger pin is attached to the rigid reinforcing member, and a part of the hanger pin is exposed from the rigid reinforcing member. The feature is that the back plate of the above-mentioned friction pad is inserted into the exposed part.

[0007]

[Action]

 As a result, the friction pad, hanger pin, and rigidity reinforcing member are unitized separately from the caliper body, and the friction pad, hanger pin, and rigidity reinforcing member are separated by attaching and detaching the rigidity reinforcing member using the mounting bolts. Is integrally attached to or removed from.

[0008]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show a first embodiment of the present invention, in which a disc brake 1 is attached to a vehicle body by a disc rotor 2 which rotates integrally with wheels (not shown) and one side portion of the disc rotor 2. It consists of a caliper body 3 and a pair of friction pads 4, 4 which are arranged inside the caliper body 3 so as to face each other with the disc rotor 2 in between.

The caliper body 3 divides a central portion of a bridge portion 3 c straddling the outer side of the disc rotor 2 in the disc circumferential direction, and a pair of caliper halves arranged opposite to both side portions of the disc rotor 2 from the bridge portion 3 c. A split type caliper in which 3a and 3b are integrally connected by four connecting bolts 5, four large and small cylinder holes 6 are formed in the caliper halves 3a and 3b so as to face each other. A cup-shaped piston 7 is housed so as to be liquid-tight and movable.

A rectangular ceiling opening 8 is formed through the bridge portion 3 c inward and outward, and the friction pads 4 and 4 are inserted and removed through the ceiling opening 8. Steps 3d and 3e are provided outside the center of the ceiling opening 8 so as to face each other, and a rigid reinforcing member 9 is fitted into the steps 3d and 3e. Outside the steps 3d and 3e, bolt insertion holes 3f and 3f are provided on the side of the caliper half 3a, and female screw holes 3g and 3g are provided on the side of the caliper half 3b. It is attached to the ceiling opening 8 by two attachment bolts 10 screwed into the bolt insertion holes 3f, 3f and the female screw holes 3g, 3g.

The friction pad 4 is composed of a lining 4a and a back plate 4b, and a hanging piece 4d having a pin hole 4c is projectingly provided at the center of the upper part of the back plate 4b. Locking arms 4e, 4e, which incline toward the hanging piece 4d, are provided at both ends of the upper portion in a protruding manner.

The rigid reinforcing member 9 is a flat H-shaped member made up of two reinforcing portions 9a and 9a that are bridged over the stepped portions 3d and 3e, and a connecting portion 9b that connects the intermediate portions of both reinforcing portions 9a and 9a. Are doing The connecting portion 9b is formed such that the width in the disc axial direction is substantially the same as the thickness of the disc rotor 2, and the thickness in the disc radial direction is thicker than the reinforcing portions 9a, 9a. Are projected inward in the disk radial direction from the reinforcing portions 9a, 9a.

An insertion hole 9c for the mounting bolt 10 is formed through each reinforcing portion 9a, and an insertion hole 9d for the hanger pin 11 is formed through the inner protruding portion of the connecting portion 9b. A pad spring 12 is attached to the lower surface of the connecting portion 9b by rivets 13 and 13, and the above-mentioned friction pads 4 and 4 are suspended from the pad spring 12.

The hanger pin 11 is formed to have substantially the same length as the reinforcing portion 9a of the rigid reinforcing member 9, and the central portion 11a is inserted into the pin insertion hole 9d of the connecting portion 9b to be attached to the rigid reinforcing member 9. It Further, the exposed portions 11b, 11b of the hanger pin 11 projecting to both sides of the insertion hole 9d are moved until the lining 4a is completely worn from a new one, and the friction pad 4 is moved in the disc axial direction so that the braking action is exerted. Have enough length to do.

The pad spring 12 has a pair of elastic legs 12b and 12b extending in a V shape on a base 12a attached to the connecting portion 9b, and a pad is provided at the tip of each elastic leg 12b. The guide portion 12c is provided in the disc axial direction. The pad guide portion 12c is formed in a substantially C-shaped cross-section having an axial slit on the upper surface, and applies the elastic force to the locking arms 4e, 4e of the friction pad 4 locked by the pad guide portion 12c. Therefore, it is held without rattling.

In the friction pads 4 and 4, the pin holes 4c of the hanging piece 4d are inserted into the exposed portions 11b and 11b of the hanger pin 11 protruding on both sides of the connecting portion 9b, and the locking arms 4e and 4e are attached. The pad guide portions 12c, 12c are inserted and hung from the end portions thereof, and the rigid reinforcing member 9, the hanger pin 11, and the pad spring 12 are integrally unitized.

The rigid reinforcing member 9 to which the friction pads 4 and 4 are attached has both ends of the hanger pin 11 supported on the bottom surfaces of the step portions 3d and 3e of the caliper body 3 and is fitted to both step portions 3d and 3e. By this fitting, the insertion hole 9c of the rigid reinforcing member 9 is arranged coaxially with the insertion hole 3f of the bridge portion 3c and the female screw hole 3g. Next, the mounting bolt 10 is inserted into the insertion hole 9c of the rigid reinforcing member 9 through the insertion hole 3f on the side of the caliper half 3a, and the male screw end 10a of the bolt 10 is inserted into the female screw hole 3g of the caliper half 3b. The rigid strength member 9 is fixed by screwing in, and the friction pads 4 and 4 are suspended so as to face both sides of the disc rotor 2.

The friction pads 4 and 4 thus mounted are held by the pad guide portions 12c and 12c of the pad spring 12 without rattling while the vehicle is running, and when the vehicle is in braking, the braking reaction force The elastic leg portions 12b, 12b of the pad spring 12 are held by the elastic force without backlash, and the movement in the disc axial direction is performed by the hanger pin 11 and the pad guide portions 12c, 12c of the pad spring 12. Good guidance by.

In this embodiment, since the friction pads 4, 4 and the rigid reinforcing member 9, the hanger pin 11 and the pad spring 12 are unitized in advance, the rigid member 9 is attached to the mounting bolts 10, 10. The friction pads 4 and 4 can be attached to predetermined positions of the caliper body 3 by attaching the friction pads 4 and 4 to the ceiling opening 8. Also, when replacing the friction pads 4 and 4, the bolts 10 and 10 are removed and the rigidity reinforcing member 9 is removed from the caliper body 3, so that the friction pads 4 and 4 can be easily removed. The replacement work can be carried out in a short time and easily as compared with the conventional method in which the rigidity reinforcing member 9, the hanger pin 11, and the pad spring 12 have to be attached and detached each time the items 4 and 4 are replaced.

Further, since the hanger pin 11 is housed in the stepped portions 3d and 3e, there is no possibility that the hanger pin 11 will be pulled out without using any special retaining means.

FIGS. 5 to 8 show a second embodiment of the present invention, in which the rigid reinforcing member 20 includes reinforcing portions 20a, 20a in the disc axial direction and connecting portions 20b, 20b in the disc circumferential direction. The rigid reinforcing member 20 is a frame body connected to the ceiling opening 8 in a rectangular shape, and the rigid reinforcing member 20 is closely fitted inside the ceiling opening 8 and has a stepped portion 3d formed outside the opening 8. , 3e.

Insertion holes 20c similar to those of the first embodiment are formed in the reinforcing portions 20a and 20a, respectively. Inner protrusions 20d, 20d that protrude inward in the disc radial direction are provided on both sides of the central portion of the connection portions 20b, 20b. The protrusions 20d, 20d have insertion holes 20e, 20e of the hanger pin 21 in the disc axial direction. Is formed to penetrate through.

The friction pads 4 and 4 are suspended on the exposed portion 21a of the hanger pin 21 which is hung on the protruding portions 20d and 20d of the rigid reinforcing member 20, and the exposed portion 21a has a first portion. Similar to the embodiment, a length is ensured that allows the friction pads 4 and 4 to move in the disc axial direction from the time when the lining 4a is completely worn to the time when the lining 4a is completely worn.

In this embodiment, the friction pads 4 and 4, the hanger pin 21, and the rigid reinforcing member 20 are integrally unitized, and the friction pad 4 is attached and detached by using the mounting bolt 10. , 4 are attached or removed.

It should be noted that the present invention is not limited to those used for piston-opposed disc brakes as in the above-described embodiments, but can be applied to any type of disc brake as long as it has a ceiling opening. Can also be applied.

[0026]

[Effect of device]

 As described above, according to the present invention, the rigidity reinforcing member provided in the ceiling opening of the caliper body is provided with the insertion hole, the hanger pin is inserted into the insertion hole, and the hanger pin is attached to the rigidity reinforcing member. By exposing a part of the hanger pin from the rigidity reinforcing member and inserting the back plate of the friction pad into the exposed part of the hanger pin, the rigidity reinforcing member, the friction pad and the hanger pin are integrated into a unit. While the rigidity of the bridge is secured by the rigidity reinforcing member, the friction pad can be easily attached and removed in a short time by simply attaching and detaching the rigidity reinforcing member. Assembly workability can be improved by omitting the work of attaching and removing the related members.

[Brief description of drawings]

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

FIG. 2 is an exploded perspective view of essential parts showing a first embodiment of the present invention.

FIG. 3 is a partially sectional plan view showing a first embodiment of the present invention.

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

5 is a sectional view taken along line V-V in FIG.

FIG. 6 is an exploded perspective view of essential parts showing a second embodiment of the present invention.

FIG. 7 is a partial sectional plan view showing a second embodiment of the present invention.

8 is a sectional view taken along line VIII-VIII in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Disc brake 2 ... Death rotor 3 ... Caliper body 3a, 3b ... Caliper half 3c ... Bridge part 3d, 3e ... Step part 3f ... Insertion hole 3g ... Female screw hole 4 ... Friction pad 4a ... Lining 4b ... Back plate 4c ... Pin insertion hole 4d ... Hanging piece 5 ... Connection bolt 8 ... Ceiling opening 9 ... Rigid reinforcement member 9a ... Reinforcement portion 9b ... Connection portion 9c ... Insertion hole 9d ... Insertion hole 10 ... Mounting bolt 11 ... Hanger pin 11a ... Hanger pin 11 central portion 11b ... exposed portion of hanger pin 11 12 ... pad spring 13 ... rivet

Claims (1)

[Scope of utility model registration request] 1. A ceiling opening is formed in a bridge portion of a caliper body arranged outside the disk rotor, and a hanger pin straddling the ceiling opening in the disk axial direction is arranged opposite to both sides of the disk rotor. In a vehicle disc brake in which a friction pad is suspended, and a rigid reinforcing member is installed by bolts in the disc axial direction of the ceiling opening, an inserting hole is formed in the rigid reinforcing member, and the inserting hole is formed in the inserting hole. Insert the hanger pin, attach the hanger pin to the rigid reinforcing member, and expose a part of the hanger pin from the rigid reinforcing member,
A disc brake for a vehicle, wherein a back plate of the friction pad is inserted into an exposed portion of the hanger pin.