JPH0129293Y2 - - Google Patents

Description

[Detailed description of the invention] [Subject of the invention and its field of application] The present invention relates to a disc brake that is used mounted on a vehicle such as an automobile, and particularly has a pair of arms that straddle a part of the outer periphery of a disc rotor. a mounting that is fixed to a part of the vehicle body, an inner pad and an outer pad that are disposed on the inside and outside of the vehicle of the disc rotor and are assembled to the arms of the mounting so as to be slidable only in the axial direction of the disc rotor; A cylinder portion that is formed in a shape that straddles the disk rotor and both pads, opens toward the back surface of the inner pad, and slidably accommodates a piston that contacts the back surface of the inner pad in the axial direction; a caliper that is slidably assembled to the mounting in the axial direction of the disc rotor through a pair of support pins that extend along the axial line of the disc rotor and that includes a reaction part that extends and comes into contact with the back metal back surface of the outer pad; This invention relates to a pin slide type disc brake comprising a main body.

[Prior art]

In the above-mentioned type of disc brake, the caliper body and the mounting arm are generally close to each other but are separated from each other, and a gap is formed between the caliper body and the mounting arm on the outer periphery of the disc rotor.

[Problems with conventional technology and their technical analysis]

Incidentally, mud gradually accumulates on the caliper body and the mounting arm, and this mud enters between the disc rotor and the pad during braking through the above-mentioned gap, causing premature wear of the pad.
This phenomenon is particularly noticeable when the caliper main body or mounting is disposed above the axis (rotation center) of the disc rotor.

[Technical issues]

The present invention has been developed to address the above-mentioned problems, and its technical objective is to eliminate the gap formed between the caliper body and the mounting arm on the outer periphery of the disc rotor.

[Technical means]

In order to achieve the above-mentioned technical problem, in the present invention, in the pin slide type disc brake, an abutment part, a cover part, an axial holding part, a radial direction A dust plate having a holding portion is fitted and fixed by its axial holding portion and radial holding portion, the abutment portion of the dust plate slidably abuts the caliper main body, and the cover portion Covering the gap between the caliper main body and the arm of the mounting on the outer periphery of the disc rotor, restricting movement of the dust plate in the axial direction of the disc rotor with the axial holding part, and regulating the movement of the dust plate in the axial direction of the disc rotor with the radial holding part. Movement of the dust plate in the radial direction of the disc rotor is restricted.

[Operations and effects of technical means]

In the disc brake according to the present invention having the above structure, the dust plate has a contact part, a cover part, an axial holding part, and a radial holding part, and the dust plate is mounted at the axial holding part and the radial holding part. It is easy to assemble because it is fitted and fixed to the outer periphery of the disc rotor in the arm with one touch.
In addition, the abutment part slidably contacts the caliper body, and the cover part covers the gap between the caliper body and the mounting arm on the outer periphery of the disc rotor, so there is almost no negative effect on the sliding movement of the caliper body. The gap can be reliably closed, mud can be prevented from entering between the disc rotor and the pad through the gap, and early wear of the pad due to mud can be prevented. In addition, when the dust plate is installed, its movement in the axial direction of the disc rotor is restricted by the axial holding part, and the movement in the radial direction of the disc rotor is restricted by the radial holding part. It will not fall off even if subjected to any impact, and its functionality is guaranteed.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a first embodiment of the present invention, and the disc brake shown here includes a disc rotor 10 that is integrally fixed to a wheel hub (not shown), and a disc rotor 10 that is integrally fixed to a wheel hub (not shown).
A mounting 11 fixed to a part of the vehicle body such as a nut (not shown) on the inside of the vehicle (upper side in FIG. 1), an outer pad 12 and an inner pad 13 supported by this mounting 11, and a piston 14 are incorporated. The main component is a caliper main body 15 consisting of:

The mounting 11 is disposed above the axis of the disc rotor 10 and
It has a pair of arms 11a, 11a that straddle a part of the outer periphery of 0, and recesses 11b, 11b for supporting the outer pad 12 and inner pads 13 are supported on opposite sides of each arm 11a, 11a. A recess (not shown, but recess 11b) for
) are integrally formed. The outer pad 12 is the disk rotor 10
The mounting 11 is mounted on the outside of the vehicle by a pair of protrusions 12b, 12b formed on the back metal 12a.
U-shaped stainless steel plates (to ensure sliding of the outer pad and prevent rattling of the outer pad) 16 are placed in the recesses 11b, 11b.
The disc rotor 10 can be slid only in the axial direction (in the vertical direction in FIG. 1) of the disc rotor 10.
Although not shown in the figure, the inner pad 13 is located inside the vehicle of the disc rotor 10, but similarly to the outer pad 12, it is fitted into the recess of the mounting 11 with a pair of protrusions formed on its back metal via a U-shaped stainless steel plate. and disk rotor 1
It is possible to slide only in the 0 axis direction.

The caliper body 15 is formed in a substantially C-shape that straddles the disc rotor 10 and both pads 12 and 13, and has a cylinder portion 15a and a reaction portion 15.
b integrally provided, and a pair of arms 15
c, 15c are integrally provided, and the arm 15c
It is attached to the mounting 11 via a pair of support pins 17 and 18 extending along the axis of the disk rotor 10 so as to be slidable in the axial direction of the disk rotor 10. The cylinder portion 15a is open toward the back surface of the inner pad 13, and accommodates the piston 14 so as to be slidable in the axial direction. The piston 14 is a cup-shaped piston that opens toward the back surface of the inner pad 13, and is slidably inserted into the cylinder portion 15a via a piston seal (not shown) having a known retract function. The sliding portion between the piston 14 and the cylinder portion 15a is protected by a boot 19, and the support pins 17, 18 and the arm 15 of the caliper body 15 are protected by a boot 19.
The sliding parts with c are protected by boots 20 and 21, respectively.

Thus, in this embodiment, a dust plate 22, which is a press-molded stainless steel product, is fitted and fixed to the outer periphery of the disc rotor 10 on the arm 11a of the mounting 11. As shown in FIGS. 3 to 5, the dust plate 22 includes a contact portion 22a having bent portions 22a1 at both ends, and a cover portion 22b that is continuous with the contact portion 22a and is slightly inclined. A pair of tongue pieces 22c as axial holding parts continuously protrude from both ends of the cover part 22b, and a pair of tongues 22c as a radial holding part continuously bent from the middle part of the cover part 22b. It consists of a piece 22d, and is fitted and fixed to the arm 11a of the mounting 11 with one touch using the tongue pieces 22c and 22d. Further, when the dust plate 22 is attached to the arm 11a of the mounting 11, as shown in FIG. 1 and FIG. , the caliper main body 15 and the mounting 1 on the outer periphery of the disc rotor 10 at the cover part 22b.
The tongue piece 22c covers the gap between the arms 11a of the disc rotor 1, and its movement in the axial direction of the disk rotor is regulated by the tongue piece 22c.
2d, movement of the disk rotor in the radial direction is restricted.

In the disc brake configured as described above, the dust plate 22 includes a contact portion 22a, a cover portion 22b, a tongue piece 22c as an axial holding portion,
It has a tongue piece 22d as a radial holding part, and the tongue pieces 22c, 22d are fitted and fixed to the outer periphery of the disc rotor 10 on the arm 11a of the mounting 11 with one touch, so assembly is easy. In addition, the contact portion 22a slidably contacts the caliper main body 15, and the cover portion 22b covers the gap between the caliper main body 15 and the arm 11a of the mounting 11 on the outer periphery of the disc rotor 10. The above-mentioned gap can be reliably closed with almost no adverse effect on the movement of the disc rotor 10 and both pads 12, 1.
It is possible to prevent mud from entering between the pads 12 and 13, thereby preventing early wear of both pads 12 and 13 due to mud. Further, in the attached state, the dust plate 22 is restricted from moving in the axial direction of the disc rotor by the tongue piece 22c serving as an axial holding part, and is restricted from moving in the radial direction of the disc rotor by the tongue piece 22d serving as a radial holding part. Because its movement is restricted, it will not fall off even if it receives any impact while the vehicle is running, and its functionality is guaranteed.

6 to 10 show a second embodiment of the present invention, in which a dust plate 122 is integrally formed with the stainless steel plate 116. In this embodiment, the contact portion 12
2a is formed continuously from the stainless steel plate 116, and a cover portion 122b is formed continuously from this. Furthermore, the U-shaped bent portion 122c serving as an axial holding portion and the tongue piece 122d serving as a radial holding portion are those of the stainless steel plate 116. In this embodiment, in addition to the functions and effects of the first embodiment described above,
Assembling man-hours can be reduced by reducing the number of parts.

[Brief explanation of the drawing]

Figures 1 to 5 are diagrams showing the first embodiment of the present invention. Figure 1 is a plan view of a pin slide type disc brake according to the present invention, and Figure 2 is a plan view of the same disc brake from the outside of the vehicle. FIG. 3 is a front view of the dust plate shown in FIGS. 1 and 2, FIG. 4 is a plan view of the dust plate, and FIG. 5 is a side view of the dust plate, and FIGS. FIG. 10 is a diagram showing a second embodiment of the present invention, FIG. 6 is a plan view of a pin slide type disc brake according to the present invention, FIG. 7 is a front view of the same disc brake as seen from the outside of the vehicle, 8 is a front view of a dust plate integrated with the stainless steel plate shown in FIGS. 6 and 7, FIG. 9 is a plan view of the same dust plate, and FIG. 10 is a side view of the same dust plate. Explanation of symbols, 10... Disc rotor, 11...
...Mounting, 11a...Arm, 12...Outer pad, 12a...Back metal, 13...Inner pad, 14...Piston, 15...Caliper body,
15a... Cylinder part, 15b... Reaction part, 17, 18... Support pin, 22... Dust plate, 22a... Contact part, 22b... Cover part, 22c... Tongue piece as an axial holding part , 22
d...Tang piece as a radial holding part.

Claims (1)

[Scope of utility model registration request] A mounting that has a pair of arms that straddle a part of the outer periphery of the disc rotor and is fixed to a part of the vehicle body;
An inner pad and an outer pad are arranged on the inside and outside of the vehicle of the disc rotor and are assembled to the arm of the mounting so as to be slidable only in the axial direction of the disc rotor, and the pad is formed in a shape that straddles the disc rotor and both pads. A cylinder part that opens toward the back surface of the inner pad and abuts against the back surface of the inner pad and accommodates the piston so as to be able to slide in the axial direction; and a reaction section that extends toward the back surface of the outer pad and abuts against the back surface of the outer pad. A pin slide type disc brake comprising: a caliper main body that is slidably assembled in the axial direction of the disc rotor to the mounting via a pair of support pins extending along the axial line of the disc rotor. , a dust plate having an abutting part, a cover part, an axial holding part, and a radial holding part is fitted and fixed on the outer periphery of the disc rotor in the mounting arm by the axial holding part and the radial holding part. The contact portion of the dust plate slidably contacts the caliper main body, the cover portion covers a gap between the caliper main body and the arm of the mounting on the outer periphery of the disc rotor, and The axial holding portion restricts movement of the dust plate in the axial direction of the disk rotor, and the radial holding portion restricts movement of the dust plate in the radial direction of the disk rotor. Pin slide type disc brake.