JP2546996Y2 - Divided caliper body for vehicle disc brake - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a caliper body of a disc brake used for various traveling vehicles such as motorcycles, and more specifically, a plurality of divided bodies made of iron and aluminum alloy are joined to each other. The present invention relates to a split caliper body for a vehicle disk brake.

[0002]

2. Description of the Related Art A large disc brake is required to cope with an increase in the speed of a vehicle, and a caliper body using a light metal such as an aluminum alloy is employed for the purpose of reducing the weight. There is a problem that the caliper used has insufficient rigidity.

[0003] Therefore, there is known a split caliper body in which an operating portion side split body made of a light metal such as an aluminum alloy and a reaction portion side split body made of iron are joined and connected to each other. As described above, when dissimilar metals are joined to each other, electric corrosion occurs on the joining surface due to the potential difference between the joining surfaces.

[0004] For the purpose of preventing the electrolytic corrosion, there has been known a structure in which a plate-like spacer made of a non-conductor is interposed and connected to a joint surface of both divided bodies (Japanese Utility Model Laid-Open No. 50-20090, Japanese Utility Model Application Laid-Open No. 62-81732).

[0005]

However, the conventional split-type caliper body is attached to the conventional split-type caliper body in such a manner that water drops such as rainwater are connected to the action-portion-side split body side and the reaction-action-portion side split body side beyond the protrusion of the spacer. In some cases, current flows between the operating part-side divided body and the reaction part-side divided body, the insulation between the two divided bodies is released, and electric corrosion occurs due to a potential difference, resulting in rusting or damage.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a split caliper for a disc brake for a vehicle in which a plurality of split bodies made of iron and an aluminum alloy are joined to each other. An object of the present invention is to provide a structure in which electric corrosion does not occur in a joint in a body.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a split caliper body for a vehicle disk brake in which a plurality of split members made of iron and an aluminum alloy are joined to each other. A configuration in which a rust coating is applied and an anodic oxide coating is applied to the surface of the divided body made of the aluminum alloy,
The joint surface is covered with a rust inhibitor.

[0008]

According to this structure, the joint surface of the two divided bodies is covered with the rust-preventive film, and no electrolytic corrosion occurs at the joint.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

The split type caliper body 1 has an operating portion side split body 3 cast from an aluminum alloy disposed on one side of a disk rotor 2 which rotates integrally with a wheel, and a reaction portion side cast from a cast iron on the other side. The divided body 4 is arranged, and the working part side divided body 3 and the reaction part side divided body 4 are connected by four connecting bolts 5.

A cylinder hole 7 into which the piston 6 is inserted is provided in the working part side divided body 3 on the disk rotor 2 side, and a reaction force claw 8 is formed in the reaction part side divided body 4.

On the surface of the working portion side divided body 3, for example,
An anodic oxide coating 9 having a thickness of about 4 μm is provided, and a rust-preventive coating 10 (for example, an adhesion amount of about 0.16 g / cm ² ) is provided on the surface of the reaction part side divided body 4. Rust prevention coating 1
Examples of 0 include nickel plating (including electroless plating), a manganese-iron phosphate coating (parkerizing), a zinc chromic acid polymer coating (dacrodized), and the like.

The surfaces 3a and 4a of the joints between the working part side divided body 3 and the reaction part side divided body 4 are covered with a rust preventive agent 11. Examples of the rust preventive 11 include an acrylic resin-based rust preventive paint, a silicon-based seal material, and a rubber-based seal material.

Further, a pair of friction pads 12, 12 are arranged between the disk rotor 2 and the working part side divided body 3 and between the disk rotor 2 and the reaction part side divided body 4, respectively. Each of the friction pads 12 includes a lining 12a slidingly contacting the sliding surface 2a of the disk rotor 2 and a back plate 12b, and is supported movably in the axial direction of the disk rotor 2.

As described above, the anodic oxide film 9 is formed on the surface of the working portion side divided body 3 cast by the aluminum alloy.
Since the surface of the reaction part side divided body 4 cast by cast iron is coated with the rust preventive film 10 and the two are joined, the joining surface 3
Even if a potential difference occurs between b and 4b, no electrolytic corrosion occurs. Further, the surfaces of the joint surfaces 3b, 4b of the working part side divided body 3 and the reaction part side divided body 4 which are most susceptible to electrolytic corrosion are treated with a rust preventive agent 1.
1, the joining surfaces 3b, 4 of the two divided bodies 3, 4
It is possible to effectively prevent the occurrence of electrolytic corrosion between b.

[0016]

[Effects of the Invention] As described above, the present invention applies a rust-preventive coating to the surface of a split body made of iron of a split caliper body, and applies an anodized coating to the surface of a split body made of an aluminum alloy to form a caliper body. , It is possible to prevent the occurrence of electrolytic corrosion due to a potential difference between the joining surfaces of the two divided bodies. In addition, when the surface of the joint between the working part side divided body and the reaction part side divided body that is most susceptible to electrolytic corrosion is covered with a rust preventive, the joint surface of both parts is insulated, so that the occurrence of electrolytic corrosion is extremely small. It can be effectively prevented.

[Brief description of the drawings]

FIG. 1 is a partially enlarged view of a caliper body showing one embodiment of the present invention.

FIG. 2 is a partial cross-sectional plan view of the caliper body showing one embodiment of the present invention.

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

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Split type caliper body, 3 ... Working part side split body, 3a
... joining surface, 4 ... reaction part side divided body, 4a ... joining surface,
9: anodized film, 10: anti-rust film, 11: anti-rust agent

Claims (2)

(57) [Scope of request for utility model registration] 1. A split caliper body for a vehicle disk brake comprising a plurality of divided bodies made of iron and an aluminum alloy joined to each other. A split caliper body for a disc brake for a vehicle, wherein an anodized film is applied to a surface of a split body made of an alloy. 2. The caliper body according to claim 1, wherein the joint surface is covered with a rust inhibitor.