JPH04110239U - Composite disc rotor - Google Patents

Abstract

(57) [Summary] [Purpose] A composite material that has sufficient welding between the liner and disc rotor during casting processing, eliminates the risk of peeling due to thermal expansion during braking, has high wear resistance, and is lightweight. To provide a disc rotor made of wood. [Configuration] Each liner having a disk-shaped outer and inner sliding surface is made of an aluminum alloy containing ceramic such as silicon carbide, and the inner cast-in surface has an overhang-like inverted liner on at least one side in the radial direction. A plurality of trapezoidal engaging protrusions are formed in a staggered manner, and the disc rotor main body is made of an aluminum alloy specified in JISH2117 and JISH2118, and the liner is cast into the rib surface of the disc rotor main body. It is made of composite material that is rolled and fixed.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to the improvement of disc rotors used in vehicle brake systems. It is something.

0002

[Conventional technology]

As part of reducing the weight of vehicles, cast iron liners have been replaced with light alloys such as aluminum alloys. For example, a disc rotor that is cast mainly in the disc rotor of As shown in Publication No. 3968 and Japanese Unexamined Patent Publication No. 55-82829, proposals have already been made. has been done.

0003 However, these composite disc rotors have a wear-resistant liner such as cast iron. and the disc rotor main body such as aluminum alloy. 1320°C to 1450°C and 650°C to 800°C, respectively. As a result, the welding between the liner and the main body of the disc rotor is incomplete, and Since there is a significant difference in the coefficient of thermal expansion of both parts, the temperature between 400°C and 70°C during braking Risk of separation between the liner and the main body of the disc rotor when the temperature rises to 0°C The drawback is that it has a built-in effect and cannot be expected to have sufficient effects in terms of weight reduction. was there.

0004

[Problem that the idea aims to solve]

In view of the above-mentioned dangers inherent in the conventional technology, the present invention aims to reduce the risk of light during casting processing. The welding between the rotor and the main body of the disc rotor is sufficient, and the coefficient of thermal expansion during braking is The difference is small, so there is no risk of separation between the liner and the main body of the disc rotor. Our goal is to provide a lightweight disc rotor with high wear resistance. .

[0005]

[Means to solve the problem] In order to solve the above-mentioned problem, in the invention of claim 1, a circle on which the brake shoe slides is The disk-shaped outer and inner liners, each having a sliding surface, are made of a composite reinforcing material. The liner is made of aluminum alloy, and the liner is made of aluminum alloy disc row. The invention has a structure in which it is cast into and fixed to the rib surface portion of the main body, and In the proposal, the inner casting surface of the disc-shaped liner is at least radially Multiple engaging protrusions with one side having an inverted trapezoidal overhang surface are formed in a staggered manner. At least on the inner casting surface, the liner is located mainly on the disc rotor. In the invention of claim 3, the rib surface part is cast and fixed. The liner is made of an aluminum alloy containing ceramics such as silicon carbide, and the disc The main body of the aluminum alloy is specified in JISH2117 and JISH2118. The structure is such that it is made of an alloy that can be used.

[0006]

[Effect]

According to the structure of claim 1, the liner is made of aluminum alloy with good mechanical braking performance. The main body of the disc rotor has high mechanical strength, which is required for brake equipment. Even if an aluminum alloy with a strength of Since it is made of gold, the difference in thermal expansion coefficient is small, and the liner remains stable even when affected by heat generated during braking. No peeling phenomenon occurs between the disc rotor and the disc rotor main body.

[0007] In addition, in the configuration of claim 2, the liner and the disc rotor main body have a cast-in structure. The bond strength of is significantly improved.

[0008] Furthermore, according to the structure of claim 3, the function of the invention of claim 1 can be fully expressed. can be done.

[0009]

【Example】

Figures 1 to 3 show an example of implementation, in which brake shoes (not shown) are in sliding contact. Each liner 2 has disc-shaped outer and inner sliding surfaces 1 and 9. It is cast into the rib surface part 4 of the main body 3 of the scrotor and is fixed integrally with the disc rotor. 5 is formed.

0010 The aforementioned liner 2 is made of composite reinforcing material such as ceramic particles such as silicon carbide. The cast surface 6 facing the rib surface portion 4 is made of an aluminum alloy containing has an overhang surface 7 on at least one side in the radial direction and has an inverted trapezoidal cross section. A plurality of engagement protrusions 8 are formed in a staggered pattern as shown in FIG.

[0011] Disc rotor main body 3 is made of aluminum alloy JISH2117 and JISH2 118, the liner 2 is cast in the rib surface portion 4, and the liner is Due to the shape of the engagement protrusion 8 of the nut 2, the casting is firmly fixed. Note that cooling air holes 12 are provided through the inner and outer peripheral surfaces of the rib surface portion 4 at equal intervals in the circumferential direction. It is.

0012 The aforementioned liner 2 was cast using a sand mold manufactured by the gas casting method, and is shown in Fig. 3. Surfaces 10 and 11 and overhang surface 7 are turned, and surfaces 13 and 14 are , 15, 16, and 17 are left as cast surfaces, and the disc rotor main body is It is cast integrally with the body 3.

[0013] The manufacturing process of this composite material disc rotor 5 includes gas mold casting method, metal mold casting method. , can be manufactured using the die-casting method and various other methods.

[0014] An example will be explained in detail using the gas type construction method shown in FIG. In Figure 4, the lower mold 20 is molded using the gas molding method, and is closely attached to the outer sliding surface 1 of the liner 2. The rotor outer side surface 18 of the lower die and the receiving surface 2 of the end surface 11 of the liner 2 1 is formed, and after molding, a liner 2 is fitted into the lower mold as shown in FIG.

[0015] Like the lower mold 20, the upper mold 22, which was molded using the gas mold method, also has a liner like the lower mold 20. - The rotor inner side surface 19 of the upper mold that is in close contact with the inner sliding surface 9 of 2 and the liner. The receiving surface 23 of the surface 11 which is the end surface of the liner 2 is formed, and after the molding, the liner 2 is fitted into the upper mold. It is fixed with adhesive.

[0016] The lower mold 20 and the upper mold 22 are a core 2 for forming the rib surface portion 4 and the cooling air holes 12. 4 is assembled internally, and the sprues 25 molded using the gas type construction method are attached at two locations. A cast rotor mold 26 is constructed by attaching the rotor mold 26.

[0017] Next, the molten aluminum alloy specified in JISH2117 mentioned above is added to the molten metal. When the molten metal is poured from the spouts 27 and 28 opened in the spouts 25 and 25, the molten metal flows into the spout 2. 7 and the weir 30 at the bottom of the spout 28. The hot water flowing into the cavity 31 of the body 3 and filling the riser 32 is heated by the riser effect. The rotor 2 is cast into a mold, and is integrally connected to the disc rotor main body 3 and solidified.

[0018] After cooling, the sprues 25, 25 and the weirs 29, 30 are removed, and then the shot The disc rotor 5 is obtained as a casting material through the finishing process by blasting. It will be done.

[0019] By using ceramic particles such as silicon carbide in liner 2, the This results in a homogeneous liner 2 in which the particles are distributed.

[0020]

[Effect of the idea]

The present invention has the structure explained above, and includes a liner and a molded liner. Since the main body of the disc rotor is made of aluminum alloy, there is little difference in expansion coefficient. Therefore, the welding between the two is complete, and the temperature rise during braking is repeated due to the presence of the engaging protrusion. Even if the liner is returned, there is no separation between the liner and the disc rotor main body.

[0021] In addition, the liner is an aluminum alloy composited with ceramics such as silicon carbide. Therefore, it is lightweight and can be manufactured at low cost.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of a disc rotor according to an example of implementation.

FIG. 2 is a partially cutaway plan view of what is shown in FIG. 1;

FIG. 3 is a sectional view taken along the line E--I in FIG. 2;

FIG. 4 is a longitudinal cross-sectional view of an example of a casting mold.

[Explanation of symbols]

1 Outer sliding surface 2 liner 3 Disc rotor main body 4 Rib surface part 5 Disc rotor 6 Inner casting surface 9 Overhang surface 8 Engagement protrusion 9 Inner sliding surface

Claims (3)

[Scope of utility model registration request] Claim 1: Each of the disc-shaped outer and inner disc-shaped liners with sliding contact surfaces on which the brake shoes are in sliding contact is made of an aluminum alloy compounded with a reinforcing material. A composite disc rotor that is cast and fixed to the rib surface. 2. A plurality of engagement protrusions each having at least one side in the radial direction formed as an inverted trapezoidal overhang surface are formed in a staggered manner on the inner casting surface of the disc-shaped liner. 2. The composite material disc rotor according to claim 1, wherein the liner is cast into and fixed to the rib surface of the main body of the disc rotor on the inner cast-in surface. 3. The liner is made of an aluminum alloy containing ceramic such as silicon carbide, and the disc rotor is made of aluminum alloy JISH2117 and JISH211.
3. The composite material disc rotor according to claim 1 or 2, wherein the disc rotor is made of an alloy defined in Item 8.