JPH0723632Y2 - Disc brake device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a carbon-carbon composite material obtained by impregnating carbon fiber with resin or pitch and firing to carbonize, or a carbon composite material obtained by impregnating carbon material with glass. The present invention relates to a disc brake device having a so-called carbon disc rotor formed by.

[Conventional technology]

A disc brake device having a carbon disc rotor is provided with a carbon disc rotor made of a carbon composite material and a pair of carbon friction pads made of a carbon composite material, as disclosed in JP-A-1-320328. ing.

This carbon disc brake device is provided on both sides of the carbon disc rotor 1 as shown in FIG. 6, for example.
A pair of carbon friction pads 4, 4 suspended by the hanger pin 3 of the caliper 2 are arranged, a piston 5 provided in the caliper 2 is hydraulically operated, and the carbon friction pads 4, 4 are used for the carbon disc rotor 1 Although the carbon disc rotor 1 and the friction pads 4, 4 are made of the same material, both of them are worn by repeated braking action.

[Problems to be solved by the device]

However, in the conventional carbon disc brake device,
Since the outer peripheral edge portion of the carbon disc rotor is often arranged so as to protrude from the outer peripheral side edge portion of the carbon friction pad, as shown in FIG. When the carbon disc rotor and the carbon friction pad wear gradually, the outer peripheral edge of the carbon disc rotor will not be worn, but will be worn from the inside a little, and the carbon friction pad will be the side face of the carbon disc rotor. It takes a long time to remove the carbon friction pad when exchanging the carbon disk rotor or the carbon friction pad.

Therefore, an object of the present invention is to provide a disc brake device in which the carbon friction pad can be easily removed even if the wear of the carbon disc rotor and the carbon friction pad progresses.

[Means for Solving the Problems]

In order to achieve the above object, the present invention presses a disk rotor made of a carbon composite material such as a carbon-carbon composite material or a glass-impregnated carbon material with a pair of friction pads made of the same material as the disk rotor. In a disc brake device that performs braking action by forming a ridge having a width narrower than the thickness of the disc rotor at the outer peripheral edge portion of the disc rotor, the outer peripheral edge portion being substantially the same as the outer peripheral side edge portion of the friction pad. It is characterized in that it is arranged so as to be flush with or inside.

[Action]

With such a configuration, the outer peripheral edge of the carbon disk rotor is located substantially flush with or inside the outer peripheral edge of the carbon friction pad, and therefore the abrasion of the carbon disk rotor and the carbon friction pad progresses due to repeated braking action. However, the outer peripheral edge of the carbon disk rotor also wears, and the carbon friction pad can be easily pulled out in the outer peripheral direction of the carbon disk rotor.

Moreover, since the width of the ridge formed on the outer peripheral edge of the carbon disk rotor is narrower than the thickness of the carbon disk rotor, it serves as a wear indicator when the carbon disk rotor is worn, and the carbon disk rotor replacement Tell the time.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

The disc brake device 10 includes a carbon disc rotor 11
Place a pair of carbon friction pads 12,12 on both sides of the caliper 1
It is hung and arranged by the hanger pin 14 of 3.

On the back surface of the carbon friction pads 12, 12, pistons 16, 16 fitted in cylinder holes 15, 15 formed in the caliper 13 so as to be liquid-tight and movable are respectively in contact, and the pistons 16, 16 are
And the hydraulic chambers 17,17 formed between the bottom of the cylinder holes 15,15
In addition, the pistons 16, 16 press the carbon friction pads 12, 12 against both side surfaces of the carbon disk rotor 11 by the pressure liquid supplied from the master cylinder (not shown) to perform the braking action.

The carbon disc rotor 11 has a ridge 11b having a width narrower than the thickness of the disc rotor 11 formed in the outer peripheral edge portion 11a in the circumferential direction, and the ridge 1b is formed at an appropriate portion of the ridge 11b.
A concave portion 11c that is wider than 1b and is narrower than the thickness of the disk rotor 11 is formed.

Further, in the carbon disk rotor 11, the outer peripheral edge portions 11a, 11a on the right and left sides of the protrusion 11b are provided on the outer peripheral side edge portions 12a, 12a of the friction pads 12, 12.
It is arranged so as to be substantially flush with a.

The outer peripheral edge portion 11a of the carbon disc rotor 11 may be located closer to the disc center than the outer peripheral side edge portions 12a, 12a of the friction pads 12, 12.

With this configuration, the carbon disc rotor 11 and the carbon friction pad 1
As shown in FIG. 4, even if the wear of the carbon disks 2 and 12 progresses, the outer peripheral edge portion 11a of the carbon disk rotor 11 also wears. Therefore, the carbon friction pads 12 and 12 can be easily moved in the outer peripheral direction of the carbon disk rotor 11. The carbon friction pads 12, 12 can be easily attached and detached.

Further, the protrusions 11b and the recesses 11c formed on the outer peripheral edge portion 11a of the carbon disc rotor 11 are
First, the side wall of the concave portion 11c is worn along with the wear of the carbon disk rotor 11, and the wear state of the carbon disk rotor 11 is recognized. It plays the role of a wear indicator that lets you know what you have done.

[Effect of device]

As described above, according to the present invention, the ridge having a width narrower than the thickness of the disk rotor is formed on the outer peripheral edge of the carbon disk rotor, and the outer peripheral edge is substantially flush with the outer peripheral side edge of the carbon friction pad. Alternatively, since the carbon disc rotor and the carbon friction pad wear due to repeated braking action, the carbon disc rotor also wears on the outer peripheral edge portion due to the repeated braking action. It can be easily pulled out in the outer peripheral direction of the rotor.

Moreover, since the width of the ridge formed on the outer peripheral edge of the carbon disk rotor is narrower than the thickness of the carbon disk rotor, it serves as a wear indicator when the carbon disk rotor is worn, and the carbon disk rotor replacement Tell the time.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention. FIG. 1 is a sectional view of a carbon disc brake device, FIG. 2 is an enlarged sectional view showing an arrangement state of a carbon disc rotor, and FIG. Fig. 3 is a sectional view taken along the line III-III in Fig. 2, Fig. 4 is a sectional view showing the worn state of the carbon disk rotor and the carbon friction pad, Fig. 5 is a view taken along the line VV of Fig. 2, and Fig. 6 is shown. It is sectional drawing which shows the worn state of the conventional carbon disc rotor and carbon friction pad. 10 ... Carbon disc brake device, 11 ... Carbon disc rotor, 11a ... Outer peripheral edge of carbon disc rotor, 11b ... Ridge, 11c ... Recess, 12 ... Carbon friction pad, 12a ... Carbon friction pad Outer peripheral edge, 1
3 ... Caliper, 14 ... Hanger pin, 15 ... Cylinder hole, 16 ... Piston, 17 ... Hydraulic chamber

Claims (1)

[Scope of utility model registration request] 1. A disc rotor made of a carbon composite material such as a carbon-carbon composite material or a glass-impregnated carbon material is pressed by a pair of friction pads made of the same material as the disc rotor to perform a braking action. In the disc brake device, a ridge having a width narrower than the thickness of the disc rotor is formed on the outer peripheral edge of the disc rotor, and the outer peripheral edge is substantially flush with or inside the outer peripheral side edge of the friction pad. A disc brake device, which is arranged so as to be positioned.