JP2542071Y2 - Torque receiving structure of pin slide type vehicle disk brake - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk brake mounted on a vehicle such as an automobile or a motorcycle, and more particularly, to a pin in which a caliper body is guided in a disk axial direction by a pair of slide pins. The present invention relates to a disk brake of a slide type having a structure in which a plate-shaped caliper bracket receives braking torque of a friction pad on an operation portion side.

[0002]

2. Description of the Related Art In a pin-slide type disk brake used in an automobile or the like, a caliper bracket fixed to a vehicle body at one side of a disk rotor is lightweight, low in material cost, and manufactured once by a press molding machine. A metal thin plate such as a steel plate that can perform a punching process is used. The caliper bracket has a pad mounting recess for accommodating the friction pad on the action portion side. During braking, the side wall of the friction pad is supported on the side wall of the friction pad on the side wall of the pad mounting recess to receive a braking torque. .

[0003] The friction pad on the working portion side adjusts the pad mounting recess toward the disk rotor side as the lining wears. With a thin caliper bracket, the friction pad extends from the new lining to the full wear. Since it is difficult to hold the back plate, a thick plate material is used for the caliper bracket, or, as disclosed in Japanese Utility Model Publication No. 2-2981, the working portion is formed on the side wall of the pad mounting recess and both sides of the opening of the pad mounting recess. It is known that the corner of the pad receiving step supporting the friction pad on the side is pushed out to one side of the caliper bracket by a press molding machine by a predetermined amount, so that the length of the side surface of the pad mounting recess is expanded. I have.

[0004]

However, increasing the thickness of the caliper bracket is disadvantageous in that it leads to an increase in weight and cost, and also extrudes the corner between the side wall of the pad mounting recess and the pad receiving step. In this case, a separate half piercing process by a press molding machine is required, and the corner portion may be distorted or deformed by bending due to the half piercing process, which may impair smooth sliding of the friction pad.

[0005] The present invention has been made in view of such circumstances, and its purpose is to increase the braking torque of the friction pad, increase the thickness of the caliper bracket,
It is an object of the present invention to provide a pin-sliding type vehicle disk brake torque receiving structure capable of favorably supporting the lining from the time of a new lining to the full wear without impairing the dimensional accuracy.

[0006]

SUMMARY OF THE INVENTION In accordance with the above-mentioned object, according to the present invention, a working portion and a reaction portion of a caliper body are disposed on both sides of a disk rotor so as to face each other, and a gap is provided between the working portion and the disk rotor. A pair of slide pins protrude in the disk axis direction on a plate-shaped caliper bracket fixed to the vehicle body, and the slide pins are inserted through guide holes formed in the action section, thereby to move the caliper body. Supports the disk so that it can slide in the axial direction,
In a pin-sliding type vehicle disc brake in which a pad mounting concave portion is formed between slide pin mounting portions of a slot, and a friction pad on an operation portion side is disposed in the pad mounting concave portion, the head of the slide pin is attached to the pad. It is protruded to the side wall and flush mounting recess, head and pad mounting of the slide pin
The torque receiving surface for supporting the side surface of the back plate of the working portion side friction pad is constituted by the side wall of the concave portion.
is there.

[0007]

In this configuration, the side wall of the pad mounting recess and the head of the slide pin aligned with it serve as a torque receiving surface for receiving the side surface of the back plate of the friction pad on the working portion side .

[0008]

1 to 4 show a first embodiment of the present invention.
It will be described based on.

The disc brake 1 includes a disc rotor 2 that rotates integrally with a wheel (not shown) in the direction of arrow A, a plate-shaped caliper bracket 3 fixed to the vehicle body at one side of the disc rotor 2, and a bracket. 3, a caliper body 5 supported via a pair of slide pins 4 and 4 so as to be movable in the axial direction of the disk, and a pair of friction members disposed inside the caliper body 5 so as to face each other with the disk rotor 2 interposed therebetween. It consists of pads 6 and 6.

The caliper bracket 3 is formed using a thin plate such as a steel plate in the same manner as in the prior art, and a pad mounting recess 3a is provided at the center thereof with an opening on the outside in the disk radial direction. Mounting holes 3 on both sides
b, 3b are formed through. The friction pad 6 on the action portion side is disposed in the pad mounting recess 3a, and the above-mentioned slide pins 4, 4 projecting from the disk rotor side are mounted in the mounting holes 3b, 3b.

The caliper body 5 includes a working portion side piece 5a.
And a reaction portion side piece 5b are connected by four connecting bolts 7. The action portion side piece 5a has an action portion 5c disposed on one side of the disk rotor 2 and a disk rotor 2 And a bridge portion 5d that straddles the outer periphery of the member are integrally formed by casting. Also, the reaction part side piece 5
In FIG. 2B, the entire plate material such as a steel plate stamped by a press machine is a reaction portion 5e disposed on the other side of the disk rotor 2.

The working portion side piece 5a is provided with a large-diameter cylinder hole 8 at the center of the working portion 5c, and small-diameter guide holes 5f, 5f on both sides thereof, each of which is open to the disk rotor 2 side. A cup-shaped piston 9 is accommodated in the cylinder hole 8 in a liquid-tight and movably movable manner.
A hydraulic chamber 10 is defined between the bottom wall of the cylinder bore 8 and the hydraulic chamber 10. On both sides of the bridge portion 5d, female screw holes 5g opening toward the reaction portion 5e are provided, each of which has two holes over the action portion 5c.
The caliper body 5 is integrally connected by screwing the connection bolt 7 into the female screw hole 5g.
Also, the slide shaft 4 is inserted into the guide hole 5f.
And supported so as to be movable in the disk axial direction.

Each friction pad 6 comprises a lining 6a which is in sliding contact with the side surface of the disk rotor 2, and a metal back plate 6b which holds the lining 6a. Working part 5c
The friction pad 6 on the side slides the caliper bracket 3
The pad mounting recess 3a is formed between the pin mounting portion, also the friction pads 6 of the reacting portion 5e side inner torque is bulged to receiving projection 5h of reacting portion 5e, 5h are respectively disposed between the working The two hanger pins 11, 11 hanged over the portion 5 c and the reaction portion 5 e are movably suspended in the disk axial direction, and are hung on both hanger pins 11, 11.
A pad spring 12 is engaged with the ceiling opening 11 and the ceiling opening 5i, and is repelled toward the center of the disk.

The slide pin 4 includes a caliper body 5
Insertion shaft portion 4a to be inserted into the guide hole 5f
And a mounting groove 4c between the shaft portions 4a and 4b into which one end of the dustproof boot 13 covering the guide hole 5f is fitted, and a mounting shaft portion 4b on the base end side fitted into the mounting hole 3b of the caliper bracket 3. And a retaining flange 4d provided around the outer end of the mounting shaft portion 4b. Mounting shaft 4b
Is set to be longer than the plate thickness of the caliper bracket 3, and the slide pin 4 is caulked outward with the tip end side of the mounting shaft portion 4 b protruding from the mounting hole 3 b toward the non-disk rotor side of the caliper bracket 3. The caliper bracket 3 is attached so as to sandwich the caliper bracket 3 between the swaged portion and the flange 4d.

[0015] The retainer flange 4 d, the torque receiving portion 4e protruding along the disc rotor side of the caliper bracket 3 to the pad mounting recess 3a direction is extended. The side face 4f of the torque receiving portion 4e is
a of the torque receiving portion 4e.
The side face 4f and the side wall 3c of the pad mounting recess 3a constitute a torque receiving surface 14, whereby the torque receiving surface 1 is formed.
4 is provided with a friction pad 6 on the side of the action portion 4c.
The length in the axial direction of the disk supporting the side surface of the back plate 6b is ensured from the time of a new article to the time of full wear.

This embodiment is configured as described above.
When the hydraulic fluid of the hydraulic master cylinder (not shown) is supplied to the hydraulic chamber 10 of the caliper body 5 by the driver's braking operation, the piston 9 is expanded by the expansion of the hydraulic chamber 10 so that the piston 9 closes to the opening of the cylinder hole 8. The piston 9 pushes the friction pad 6 on the action portion side, and presses the lining 6 a of the friction pad 6 against one side surface of the disk rotor 2. Next, due to this reaction, the caliper body 5 slides toward the action portion 5c, the reaction portion 5e pushes the friction pad 6 on the reaction portion side, and the lining 6a of the friction pad 6 moves to the other side of the disk rotor 2. When pressed, a braking action is performed.

The friction pads 6 and 6 are slid in the direction of arrow A by the braking torque generated by sliding contact with the disk rotor 2, and the side of the back plate 6b on the disk outlet side receives torque on the action portion 4c side. At the reaction portion 4e side, the side surface of the back plate 6b on the disk outlet side also contacts the torque receiving projection 5h, and the braking torque is supported. The friction pad 6 on the reaction portion slides integrally with the caliper body 5 in the disc axial direction due to the above-mentioned braking and the wear of the lining 6a, whereas the friction pad 6 on the action portion has a caliper during braking. It operates in the opposite direction to the body 5 and is gradually fed out from the torque receiving surface 14 toward the disk rotor 2 as the lining 6a wears. In this embodiment, the side wall 3c of the caliper bracket 3 and the slide pin 4 in combination with the torque receiving portion 4e, the torque receiving surface 14 having a sufficient length in the disk axial direction.
As a result, the back plate 6b of the action portion side friction pad 6 is held from the time when the lining 6a is new to the time when it is fully worn.

In this embodiment, as described above, the mounting shaft 4b
With caulking portion, the retainer flange 4d of the slide pin head which constitutes the fixing means of the slide pins 4, to extend the torque receiving portion 4e, side 4 of the torque receiving portion 4e
f is aligned with the side wall 3c of the pad mounting concave portion 3a, and the necessary length is secured on the torque receiving surface 14 on the operating portion side.
For the caliper bracket 3, a thin plate that is lightweight and easy to mold can be used.
Since it is only necessary to slightly change the shape, the cost is advantageous and the manufacturability is excellent. Further, since post-processing such as half piercing is not required, the dimensions of the friction pad 6 on the working portion side can be satisfactorily slid from the time when the lining 6a is new to the time when the lining 6a is fully worn, without distortion or bending. it can.

The slide pin 20 of the second embodiment shown in FIG.
Is composed of an insertion shaft portion 20a, a mounting shaft portion 20b on the base end side, a boot groove 20c, and a flange 20d for retaining the same as in the first embodiment. 20d and mounting shaft 20
The difference from the first embodiment is that the swaged portion b is replaced.

On the flange 20d of the slide pin 20,
Torque receiving portion 20e which protrudes to the pad mounting recess 3a along the disc rotor side of the caliper bracket 3 are extended, the side surface 20f, the pad mounting recess 3
a of the slide pin 20
The torque receiving surface 21 is constituted by the side surface 20f and the side wall 3c of the pad mounting recess 3a .

[0021]

[Effect of the invention] As described above, the present invention
A pair of slide pins on the disk bracket in the disk axis direction
The slide pin mounting part of the caliper bracket
A pad mounting recess is formed between
The head protrudes flush with the side wall of the pad mounting recess,
Works with the head of the slide pin and the side wall of the pad mounting recess
The torque receiving surface that supports the side of the back plate of the
Due to the configuration, the required length is
Lightweight, molded into a caliper bracket
It is possible to use thin plates that are easy to
It is only necessary to slightly change the shape of the slide pin
Excellent in cost and excellent in manufacturability. Also half
Since post-processing such as piercing is not required, dimensions due to distortion or bending
Lining of the friction pad on the working part side without deviation of the law
It can be slid well from new to full wear.
Can be.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional plan view of a disc brake showing a first embodiment of the present invention.

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a sectional view taken along line III-III of FIG. 2;

FIG. 4 is a sectional view taken along line IV-IV of FIG. 3;

FIG. 5 is a sectional plan view of a main part of a disc brake showing a second embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Disc brake 2 ... Disc rotor 3 ... Caliper bracket 3a ... Pad mounting recess 3b ... Mounting hole 3c ... Side wall of pad mounting recess 3a 4 , 20 ... Slide pin 4a ... Insert shaft 4b ... Mounting shaft 4c ... Boot groove 4d ... Flanges 4e , 20e of the head of the slide pin 4 serving as the fixing means of the present invention ... Torque receiving portions 4f , 20f ... Side surfaces 5 of the torque receiving portion 5 ... Caliper bodies 5c ... Working portions 5d ... Bridge portions 5e ... Reaction portions 5f ... Guides Hole 5h: Torque receiving projection 6: Friction pad 6a: Lining 6b: Back plate 7: Connection bolt 14 , 21, ... Side wall of pad mounting recess and head of slide pin
Torque receiving surfaces A ... rotational direction of the disk rotor 2 composed of the parts

Claims (1)

(57) [Scope of request for utility model registration] An operating portion and a reaction portion of a caliper body are disposed on both sides of a disk rotor so as to face each other, and a plate-shaped caliper bracket fixed to a vehicle body between the operating portion and the disk rotor is provided. a pair of slide pins projecting from the disk axis direction, the slide pin, together with the is passed through the drilled guide hole in the acting portion, slidably supports the caliper body to the disk axis direction, the carry
The pad mounting recess is formed between the slide pin attachment part of the path the brackets, the pins slide type disc brake for a vehicle which is disposed the friction pad acting portion side in the pad mounting recess, the head of the slide pins, the pad It is protruded to the side wall and flush mounting recess, of the slide pin head and path
A torque receiving structure for a pin-slide type vehicle disk brake, wherein a torque receiving surface for supporting a side surface of a back plate of a working portion side friction pad is constituted by a side wall of a pad mounting recess .