JPS6148622A - Compound brake disc - Google Patents

Abstract

PURPOSE:To prevent the occurrence of thermal deformation or any other trouble in a metal disc by providing a ventilating path for cooling a metal disc, and a bell mouth being opposite to the ventilating path with air inlets. CONSTITUTION:A metal disc 4 sandwiched between double friction side plates 21 (C/C composite-friction side plates) made of carbon.carbon composite material is provided with a ventilating path for air-cooling, and plural air inlets 9 are also drilled on the splined section 6 of the bell mouth 1 being opposite to the above ventilating path. In this way, the metal disc 4 is provided with a spacer 8 to ensure plural air flow paths, and the end of the bell mouth 1 with the air inlets 9. A cooling air is therefore introduced into the inside of the bell mouth 1 as the disc 4 rotates, and then discharged to the periphery of the metal disc 4 through the air flow paths represented with flowing lines 10 to sufficiently cool the disc 4 during this process.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a brake disc made of a novel composite material.

[Conventional technology]

In vehicles such as large buses and trunks, disc brakes are used under extremely harsh conditions.
Disc brakes made from conventional materials such as cast iron frequently suffer from problems such as heat cracks and fade, which have become serious problems.

As a countermeasure to this problem, attempts have been made to manufacture the entire disc and band from a carbon-carbon composite (hereinafter abbreviated as C/C combo), and this has been put into practical use in some racing motorcycles and four-wheeled vehicles.

However, since the disc brake of this structure generates a lot of noise when using the C/C combo, it is considered too expensive to be adopted in general civilian vehicles due to cost considerations.

For this reason, on the surface of discs and pads made of conventional materials,
Although it is desired to propose a specific method for attaching C/C' components, there are still many problems such as differences in physical properties such as thermal expansion coefficient with conventional materials and mechanical constraints, and solutions have not yet been found. In view of the situation, the present applicant first placed i pieces of 'C/C combo friction side plates on both sides of the conventional material disk and connected them with a bell mouth inside each to create a mechanism for restraining rotational movement. proposed a composite brake disc equipped with elements.

[Problem that the invention seeks to solve]

The present invention uses expensive C/C components as disc brake materials, suppresses increases in brake manufacturing costs, and eliminates problems such as heat crank and fade that frequently occur with conventional materials. This is a further improvement to the brake disc Z proposed in

[Means for solving problems]

The gist of the present invention is to provide a composite brake disc consisting of both friction side plates made of carbon-carbon composite and a conventional metal plate sandwiched between them, in which an air passage for air is established in the metal disc. The present invention provides a composite brake disc in which an inlet for introducing air into the air flow path is attached to a disc mounting element part that fits with the brake disc. A ventilation passage for air cooling is created in the metal disc made of conventional material, and at the same time, multiple air inlets are cut in the spline attached part of the bell mouth facing this ventilation passage, and the metal disc is cooled by the introduced air. The purpose is to prevent thermal deformation and other damage to metal discs and rods due to frictional heat generated during operation.

The present invention will be explained below with reference to FIGS. 1 and 2.

Figure 1 shows an example in which a cooling ventilation passage is provided inside the metal disc, and Figure 2 shows an example in which the ventilation passage is provided outside the metal disc (between the C/C component friction side plate and the metal disc). Here is an example. It is also possible to carry out the above two steps simultaneously to achieve a more thorough cooling effect.

1 is the bell mouth where the composite brake disc is attached, 2 is the C/C component friction side plate, 4 is the metal disc, 6 is the C/C
A spline attached to the end of the bell mouth 2 that engages with the component friction side plate 2 and the metal disk 4, and an end plate 7, a front grate 5, and a bolt 3 are connected to the C/C component friction side plate 2 and the metal disk 4. This is an element that prevents the bell mouth from falling off from the bell mouth 2.

Now, there is a spacer 8 on the metal disk 4 to ensure a plurality of air flow paths, and an air inlet 9 on the end of the bell mouth 2.
If provided, the cooling air is introduced from the inside of the bell mouth 2 as the disk rotates, and is discharged to the outer periphery of the metal disk 4 through the flow path represented by the streamline 10. The metal disc is sufficiently cooled, and thermal deformation and other problems with brake performance due to heat effects can be extremely easily avoided. /C
It is comparable in performance to components made from 100-inch disks, and thermal deformation and other effects of heat are avoided compared to those made from conventional metal disks.

[Brief explanation of drawings]

Figures 1 and 2 respectively show a cross-sectional view and a front view of the brake disc of the present invention. Z end play 1/8, spacer. 9. Air inlet - 10. Streamline

Claims (1)

[Claims] In a composite brake disc consisting of both friction side plates made of carbon-carbon composite and a conventional metal plate sandwiched between them, an air flow path for air is established in the metal disc, and the disc fitting is used for mounting the disc. A composite brake disc characterized in that an element component is provided with an inlet for introducing air into the air flow path.