TWI695126B - Carbon ceramic brake disc - Google Patents

Abstract

A carbon ceramic brake disc integrates an inner brake disc, an outer brake disc and a colloid, whereby the carbon ceramic brake disc has the characteristics of light weight, heat resistance and resistance to deformation, and improves the ceramic brake disc Production yield and extend the service life of ceramic brake discs.

Description

Carbon ceramic brake disc

The invention relates to a carbon ceramic brake disc, in particular to a carbon ceramic brake disc with a structure for improving braking performance.

The common brake devices are drum brakes and disc brakes. Both of these brake devices are used to make the discs rub against the brake drum or brake disc. The friction is used to achieve the effect of deceleration and the brake The disc is connected with the rim to achieve the purpose of slowing down or stopping the vehicle.

Common brake discs on the market are made of stainless steel or aluminum alloy as the main component, but the weight of the metal brake disc is heavier, its heat resistance and deformation resistance are also poor, and its friction coefficient As the temperature increases, it decreases. Therefore, during high-speed competition, the addition of a metal brake disc will not only increase the overall weight of the vehicle, but when the heat is generated when it is actuated for a long time, it will be prone to braking force decline and deformation of the brake disc. .

Ceramics have the characteristics of hardness, wear resistance, high temperature resistance, etc., so they are often used in optoelectronics, semiconductors, and electrical equipment. Pure ceramic materials do not have ductility, which limits their scope of application. Carbon ceramic composites toughened by carbon fiber cloth Materials, which can make up for the shortcomings mentioned above It can be used in a wider range of fields, for example: ceramic brake discs made of carbon fiber/carbon ceramic composite materials have good thermal conductivity, high thermal radiation coefficient and excellent heat dissipation, and the friction coefficient will not decrease due to temperature rise And other advantages, so it is safer than metal brake discs under the condition of high temperature caused by severe braking. Carbon/ceramic brake discs have been widely used in racing heavy machines and racing cars, even in general high-end motorhomes.

Although the carbon ceramic composite material has the above advantages, but the conventional use of the carbon ceramic composite material to make the brake disc will face the disadvantage that the ceramic does not have ductility and is brittle or cracked, especially in the fixing of the brake disc and the rim At any place, whether it is fixed by a lock screw or braked, it will cause greater stress on the part, which is easy to damage the ceramic brake disc.

Therefore, there is an urgent need to develop a ceramic brake disc in the industry. By improving the structure and materials, the ceramic brake disc can withstand the stress performance, thereby improving the production yield of the ceramic brake disc and extending the service life of the ceramic brake disc.

In view of the shortcomings of the above-mentioned prior art, the main object of the present invention is to provide a carbon ceramic brake disc integrating an inner brake disc, an outer brake disc and a gel, by which the carbon ceramic brake disc has a light weight , Heat resistance, deformation resistance, and improve the production yield of ceramic brake discs, and extend the service life of ceramic brake discs.

In order to achieve the above object, according to a solution proposed by the present invention, a carbon-ceramic brake disc is provided, which can be used in a brake system with a brake pad and a rim, which may include: a brake inner disc, which may be a ring-shaped aluminum An alloy disc, the inner brake disc may include the inner brake disc body, a plurality of shear load-bearing structures, a plurality of hollow structures, a plurality of inner and outer disc fixing structures, and a plurality of rim fixing structures. The plurality of shear load-bearing structures are provided on the On the outer side of the inner brake disc body, the plurality of hollow structures are arranged on the inner brake disc body, the plural inner and outer disc fixing structures are arranged on the inner brake disc body, and the plural rim fixing structures are arranged on the inner brake disc On the disc body, wherein the shear load-bearing structure may be a semi-ring structure; an outer brake disc may be a ring-shaped carbon ceramic composite material disc, which is arranged outside the inner disc of the brake and may have The plurality of grooves corresponding to the plurality of shear load-bearing structures, the outer brake disc can be used for contact friction with the brake disc during braking; a gel can be used to bond and fix the inner brake disc and the outer brake disc.

The carbon-ceramic brake disc of the present invention, wherein the carbon-ceramic composite material can be prepared with ceramic glue and carbon fiber cloth, and the steps of the preparation method of the carbon-ceramic composite material can include: (A): a ceramic glue and a Carbon fiber cloth is made into a prepreg; (B): The prepreg is pressed with a hot press to make a carbon ceramic composite material; (C): The carbon ceramic composite material is placed in an infiltration mold to infiltrate the ceramic Precursor to the carbon-ceramic composite material, and then heat-treat the carbon-ceramic composite material; (D): Repeat step (C) to make a certain density carbon-ceramic composite material.

The carbon ceramic brake disc of the present invention, wherein the plurality of hollow structures can occupy 45% to 65% of the area of the brake disc.

The carbon ceramic brake disc of the present invention, wherein the radius of the inner disc of the brake may be 1.7 cm to 6 cm, and the radius of the outer disc of the brake is 4.75 cm to 8 cm.

In the carbon ceramic brake disc of the present invention, the material of the colloid can be selected from the group consisting of graphite adhesive, epoxy resin, and phenolic resin.

According to the carbon ceramic brake disc of the present invention, the carbon ceramic composite material may be ceramics with a weight ratio ranging from 50 to 80% and carbon fibers with a weight ratio ranging from 20 to 50%.

The carbon ceramic brake disc of the present invention, wherein the plurality of hollow structures can be a first hollow structure, a plurality of second hollow structures, and a plurality of third hollow structures. The plurality of second hollow structures can be six fan-shaped hollow structures. The plurality of third hollow structures may be six triangular hollow structures, wherein the first hollow structure is disposed at the center of the disc body in the brake, and the plural second hollow structures and the plural third hollow structures are staggered and surround The first hollow structure.

According to the carbon ceramic brake disc of the present invention, the length of the shear load-bearing structure is 2.9 cm, and the width of the shear load-bearing structure is 0.7 cm. The shear load-bearing structure forms a phase with the inner body of the brake disc Corresponding plural fourth hollow structure.

The carbon ceramic brake disc of the present invention further includes plural rivets The fixed structure of the plurality of inner and outer discs can be used to fix the inner brake disc and the outer brake disc.

The above summary, the following detailed description and the accompanying drawings are intended to further illustrate the ways, means and effects of this creation to achieve its intended purpose. The other purposes and advantages of this creation will be explained in the subsequent description and drawings.

100: external brake disc

200: Internal brake disc

210: Shear load-bearing structure

220: Complex hollow structure

221: The first hollow structure

222: Second hollow structure

223: The third hollow structure

224: Fourth hollow structure

230: Internal and external disc fixing structure

240: Wheel fixing structure

250: brake disc body

The first figure is a schematic view of the front structure of an embodiment of the carbon ceramic brake disc of the present invention; the second figure is a schematic view of the back structure of the embodiment of the carbon ceramic brake disc of the present invention.

The following is a specific example to illustrate the implementation of this creation. Those familiar with this skill can easily understand the advantages and effects of this creation from the content disclosed in this specification.

The carbon ceramic composite material of the invention is made of ceramic glue and carbon fiber cloth to make a prepreg. The size and number of pieces required for cutting the prepreg are pressed by a hot press to make a carbon ceramic composite material, and then in the glue infiltration mold , Infiltrate the ceramic precursor, heat-treat the ceramic precursor into ceramics; use carbon ceramic composite material on the brake disc, the role of the ceramic can be used as a friction material to facilitate the bite when braking; and carbon fiber provides this disc brake disc Excellent mechanical strength, due to the All the components of the carbon ceramic material have high temperature thermal stability, so it can give the brake disc surface not to change its properties due to the temperature rise when the brake is actuated, or to deform due to thermal stress, and its weather resistance and corrosion resistance The performance will be better than metal-based or polymer-based composite materials.

The carbon-ceramic composite material mentioned in the present invention can be prepared by the following steps: (A): a prepreg is made from a ceramic glue and a carbon fiber cloth; (B): the hot-press is used to press the Pre-impregnated cloth to make a carbon ceramic composite material; (C): Place the carbon ceramic composite material in a glue infiltration mold, infiltrate the ceramic precursor to the carbon ceramic composite material, and heat-treat the carbon ceramic composite material; (D): Repeat step (C) to make a carbon ceramic composite material with a certain density; thereby, the carbon ceramic composite material can improve the shortcomings of the conventional technology and form a carbon ceramic composite material with a certain thickness and strength.

Please refer to the first to second drawings, which are schematic diagrams of embodiments of the carbon ceramic brake disc of the present invention, wherein the first diagram is a schematic diagram of the front structure of the embodiment, and the second diagram is a schematic diagram of the back structure of the embodiment, as shown The carbon-ceramic brake disc of the present invention can be used in a brake system with brake pads and rims, and can include: an internal brake disc (200), which can be a ring-shaped aluminum alloy disc, the internal brake disc It can include the inner brake disc body (250), plural shear load-bearing structure (210), plural hollow structure (220), plural inner and outer disc fixing structures (230) and plural rim fixing structures (240), the plural shears Force bearing structure (210) The plurality of hollow structures (220) are arranged on the outer side of the inner brake disc body (250), the plurality of hollow structures (220) are arranged on the inner brake disc body (250), and the plurality of inner and outer disc fixing structures (230) are arranged on the inner brake disc The body (250) may be provided with screws or rivets on the plurality of inner and outer disc fixing structures (230) to fix the brake inner disc (200) and the brake outer disc (100), more preferably, the rivets are used to fix the When the inner disc (200) of the brake and the outer disc (100) of the brake are used, the easy-to-join feature of the rivet can reduce the stress of the joint, avoid the damage of the ceramic disc due to excessive force, and prevent vibration Shedding; the plural rim fixing structure (240) is arranged on the inner brake disc body (250), and can be screwed on the plural rim fixing structure (240) to fix the inner brake disc (200) and the vehicle body Because the inner disc (200) of the brake is screwed to the rim with a screw and uses a more resilient metal material, it can effectively prevent the part from being damaged due to excessive stress when locking and when the brake system is operating; The shear load-bearing structure (210) may be a semi-ring structure; an outer brake disc (100), which may be an annular carbon ceramic composite material disc, is disposed outside the inner brake disc (200), and With a plurality of grooves corresponding to the plurality of shear load-bearing structures (210), the outer brake disc (100) can be used to make contact friction with the brake system when braking, thereby reducing the speed of the vehicle, and when the brake system During operation, the plurality of shear load-bearing structures (210) and the plurality of grooves are combined with each other due to their concave-convex structure, which can provide sufficient shear support for the inner brake disc (200) and the outer brake disc (100), so that the The carbon ceramic disc can withstand the shear force caused to the surface during rotation to avoid damage to the carbon ceramic disc; and a gel can be used in the brake The disc is adhered and fixed to the outer disc of the brake.

The carbon-ceramic brake disc of the present invention, wherein the carbon-ceramic composite material can be ceramic with a weight ratio ranging from 50 to 80% and carbon fiber with a weight ratio ranging from 20 to 50%; the material of a brake disc can be aluminum The alloy, more preferably, can be used as a metal material with high toughness and low density. The material of the colloid can be selected from the group consisting of graphite glue, epoxy resin, and phenolic resin.

In an embodiment of the carbon ceramic brake disc of the present invention, the plurality of hollow structures can occupy 45% to 65% of the area of the brake disc. The plurality of hollow structures (220) can be a first hollow structure (221), The plural second hollow structure (222) and the plural third hollow structure (223), the plural second hollow structure (222) may be six fan-shaped hollow structures, and the plural third hollow structure (223) may be six triangular hollows Structure, wherein the first hollow structure (221) is disposed in the center of the disc body (250) in the brake, the plural second hollow structure (222) and the plural third hollow structure (223) are staggered and surround In the first hollow structure (221), the length of the shear load-bearing structure (210) may be 2.9cm, and the width of the shear load-bearing structure (210) may be 0.7cm. These shear load-bearing structures (210) are A corresponding plurality of fourth hollow structures (224) are formed between the inner brake disc body (250), the radius of the inner brake disc (200) may be 1.7cm to 6cm, and the outer brake disc (100) The radius can be from 4.75cm to 8cm. Therefore, the carbon ceramic brake disc proposed by the present invention can increase the hollowed area and still maintain the mechanical strength, thereby achieving the purpose of lightening.

The present invention proposes a two-piece internal and external dish for the characteristics of carbon ceramic materials Design, compared with the integrally formed ceramic brake disc, the inner brake disc of the present invention is metal, and the outer disc of the brake is carbon ceramic composite material; because the inner disc needs to be directly screwed on the rim, a more resilient The metal material can effectively avoid the damage of this part due to excessive stress when locking and the brake system is in operation; the shear load-bearing structure at the junction of the inner and outer discs of the brake has a large arc design to increase its bearing area to reduce Stress; the inner disc of the brake has a large area of holes, which can effectively reduce the weight of the brake disc 25-45% without compromising the structural strength; the shear load-bearing structure can be structurally strengthened according to the running direction of the brake disc to make the force Strong structural support in the direction; the fixed structure of the inner and outer discs is designed with rivets. The easy-to-join feature can reduce the stress of the joint, avoid the damage of the ceramic disc due to excessive force, and have the ability to prevent vibration and fall off. In summary, the present invention improves the stress resistance of ceramic brake discs by improving the structure and materials, thereby improving the yield of ceramic brake discs and extending the service life of ceramic brake discs.

At present, Siccc, the only carbon fiber brake disc brand in the world, can only be produced in small quantities, and the brake performance is poor after testing the dry/wet average braking force and heat resistance test.

The invention proposes to produce a lighter-weight carbon ceramic brake disc (outer brake disc) and a metal support disc (inner brake disc). The gap between the brake disc and the support disc is joined with glue to make the brake disc The disc is integrated with the aluminum alloy support disc, and there will be no collision between the two during braking to improve carbon The performance of the ceramic brake disc and aluminum alloy support disc module, and when the specifications are the same with a radius of 8cm, the overall weight is about 90g.

According to the above discussion, it can be concluded that the improved carbon-ceramic brake disc of the present invention has the following advantages: 1. Increased brake sensitivity; 2. Improve handling performance; 3. Better high temperature resistance; 4. Lightweight-only the same size metal The brake discs are 50%-70%, which helps to improve the suspension performance; 5. It can produce excellent braking force without preheating; 6. Good heat dissipation-extend the life of the caliper.

The above-mentioned embodiments are only illustrative of the characteristics and effects of this creation, and are not intended to limit the scope of the substantive technical content of this creation. Anyone who is familiar with this skill can modify and change the above-mentioned embodiments without violating the spirit and scope of creation. Therefore, the protection scope of the rights of this creation should be as listed in the patent application scope described later.

100: external brake disc

200: Internal brake disc

210: Shear load-bearing structure

220: Complex hollow structure

221: The first hollow structure

222: Second hollow structure

223: The third hollow structure

224: Fourth hollow structure

230: Internal and external disc fixing structure

240: Wheel fixing structure

250: brake disc body

Claims (9)

A carbon ceramic brake disc is used for a brake system with a brake pad and a rim. The brake disc includes: a brake inner disc, which is an annular aluminum alloy disc, and the brake inner disc includes a brake inner Disc body, plural shear bearing structure, plural hollow structure, plural inner and outer disc fixing structure and plural rim fixing structure, the plural shear bearing structure is arranged on the outer side of the inner disc body of the brake, the plural hollow structure is arranged on In the brake inner disc body, the plural inner and outer disc fixing structures are arranged on the inner brake disc body, and the plural rim fixing structures are arranged on the inner brake disc body, wherein the shear bearing structure is half Ring-shaped structure; a brake outer disc is a ring-shaped carbon ceramic composite material disc, which is arranged outside the brake inner disc and has a plurality of grooves corresponding to the plurality of shear load-bearing structures, the The outer brake disc is used for contact friction with the brake disc during braking; a gel is used to bond and fix the inner brake disc and the outer brake disc. The carbon ceramic brake disc as described in item 1 of the patent application scope, wherein the carbon ceramic composite material is made of ceramic glue and carbon fiber cloth. The carbon ceramic brake disc as described in item 2 of the patent application scope, wherein the method for preparing the carbon ceramic composite material includes: (A): making a prepreg with a ceramic glue and a carbon fiber cloth; (B ): Press the prepreg with a hot press to make a carbon ceramic composite material; (C): Place the carbon ceramic composite material in an infiltration mold and infiltrate the ceramic precursor to the carbon ceramic composite material, Performing heat treatment on the carbon ceramic composite material; (D): repeating step (C) to make a carbon ceramic composite material with a certain density. The carbon ceramic brake disc as described in item 1 of the patent application scope, wherein the plurality of hollow structures account for 45% to 65% of the area of the brake disc. The carbon ceramic brake disc as described in item 4 of the patent scope, wherein the plural hollow structure is a first hollow structure, plural second hollow structure and plural third hollow structure, and the plural second hollow structure is Six fan-shaped hollow structures, the plurality of third hollow structures are six triangular hollow structures, wherein the first hollow structure is disposed at the center of the disc body in the brake, the complex second hollow structures and the complex third The hollow structure is staggered and surrounds the first hollow structure. The carbon ceramic brake disc as described in item 5 of the patent application, wherein the length of the shear load-bearing structure is 2.9 cm, and the width of the shear load-bearing structure is 0.7 cm. The carbon ceramic brake disc as described in item 1 of the patent scope, wherein the material of the colloid is selected from the group consisting of graphite glue, epoxy resin, and phenolic resin. The carbon-ceramic brake disc as described in item 1 of the patent application scope, wherein the carbon-ceramic composite material is ceramics with a weight ratio ranging from 50 to 80% and carbon fibers with a weight ratio ranging from 20 to 50%. The carbon-ceramic brake disc as described in item 1 of the patent application scope further includes a plurality of rivets provided on the plurality of inner and outer disc fixing structures for fixing the inner brake disc and the outer brake disc.

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