JPH0749086Y2 - Split caliper body for vehicle disc brakes - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc brake mounted on a vehicle, and in particular, one of the two caliper halves has a reaction pawl and a spacer is interposed between the two caliper halves. The present invention relates to a split type caliper body having a structure.

[0002]

2. Description of the Related Art In a split type caliper body constructed by connecting two split caliper halves on both sides of a disc rotor, for example, as shown in Japanese Utility Model Laid-Open No. 62-81732, the outer circumference of the disc is split. There is a plate-like spacer on the surface that allows the same caliper half to be used for multiple models with different disk and pad thicknesses.

[0003]

However, in the above-mentioned structure, the caliper body is deformed by a braking reaction force so as to open in a V shape around the division surface outside the disk rotor. For this reason, the reaction force claw that is greatly affected by the braking reaction force is opened more toward the center of the disc, and the lining of the friction pad is worn more as it is closer to the outer peripheral edge of the disc rotor.

In order to prevent uneven wear of the lining of the friction pad, a technique has been disclosed in which the reaction force pawl is provided with a predetermined angle. However, since the caliper body is an integral type, the disc thickness and the pad thickness are increased. It cannot be diverted to correspond to.

Therefore, the present invention can prevent uneven wear of the friction pad with a simple structure even if the caliper body is deformed during braking, and can be used for various models having different disk thicknesses and pad thicknesses. An object of the present invention is to provide a split type caliper body of a vehicle disc brake that can be used.

[0006]

In order to achieve the above object, in the first invention, a cylinder hole is provided from the outside of the disk rotor to one of the two caliper halves divided into both sides of the disk rotor. In a split type caliper body of a vehicle disc brake, in which both caliper halves are connected via a spacer to the split surfaces of both caliper halves provided with reaction force pawls on the other side, the spacer is provided from the inner circumference side of the disc. It is formed in a wedge shape so that it becomes thicker toward the outer peripheral side of the disc, and a gap that expands toward the outer peripheral side of the disc is set between the reaction force pawl and the friction pad pushed by the reaction force pawl. It has a feature.

The second invention is characterized in that the caliper bodies are made of different metals and the spacers are insulated.

[0008]

In the first aspect of the invention described above, the gap extending toward the outer peripheral side of the disk is set between the reaction force claw and the friction pad pushed by the reaction force claw, so that the reaction force is not applied when the brake is not applied. Only the tip of the force pawl is in contact with the friction pad, but as the caliper deforms as described above during braking, the contact surface of the reaction pawl with the friction pad gradually expands toward the disk outer peripheral side. As a result, the opening of the reaction force pawl is suppressed, and the wear amount of the friction pad can be made substantially uniform.

Further, in the second structure, since the spacer is subjected to the insulation treatment, when the caliper half body and the spacer are made of different metals, electrolytic corrosion between the different metals can be prevented.

[0010]

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

In the disc brake 1, a bracket 2 fixedly mounted on the vehicle body is arranged on one side surface of a disc rotor 3 which rotates integrally with wheels, and slides projecting from support arms 2a, 2a on both sides. A caliper body 5 is supported by a pin 4 so as to be movable in the disc axial direction, and the disc rotor 3 pushes a pair of friction pads 6 and 6 provided on opposite sides of the caliper body 5 by the caliper body 5. And is braked.

Each friction pad 6 is composed of a lining 6a slidably contacting the disc rotor 3 and a back plate 6b to which the lining 6a is fixed, and the upper part of the back plate 6b is held by a hanger pin 7. There is.

The caliper body 5 is divided into two parts from the outside of the disc rotor 3 to both sides of the rotor 3, and the caliper half 5a on the working portion side is made of aluminum alloy and the caliper half 5b on the reaction portion side is cast iron. The caliper halves 5a and 5b, which are respectively formed, are connected to each other by a connecting bolt 9 with a spacer 8 sandwiched between the outer peripheral divided surfaces of the disc rotor 3. A piston 10 is inserted in a cylinder hole 5c formed in the caliper half 5a on the action part side, and a reaction force claw 5d is provided on the caliper half 5b on the reaction part side.

Similar to the caliper half 5a, the spacer 8 is formed of an aluminum alloy, is formed in a wedge shape so as to become thicker from the inner peripheral side of the disc toward the outer peripheral side of the disc, and the caliper half 5b is formed of cast iron. Insulation is applied to the contact surface with.

When the caliper body 5 is formed by assembling the caliper halves 5a and 5b and the spacer 8 with the connecting bolt 9, the reaction force claw 5d and the back plate 6b of the friction pad 6 on the reaction part side.
A space E that expands toward the outer peripheral side of the disk is formed between the space E and the space E. The angle E of the space E is the same as the angle β formed by both contact surfaces of the spacer 8, and The angle β is determined according to the degree of uneven wear due to the strength difference due to the lining material and the back plate thickness.

In the disc brake 1 as described above, only the tip 5e of the reaction claw 5d is in contact with the friction pad during non-braking. Further, when the caliper body 5 is deformed around the joint surface between the caliper halves 5a and 5b and the spacer 8 during braking, the contact surface between the reaction force claw 5b and the back plate 6b gradually becomes the reaction force claw 5d. It expands toward the base 5f side. As described above, even if the caliper body 5 is deformed by the braking reaction force, the reaction force claw 5d is not easily separated from the back plate 6b, and a wide pressing area for the friction pad 6 can be secured on the inner and outer circumferences of the disc. The reaction force does not easily separate from the back plate 6b, and the lining 6a can be worn almost uniformly.

Further, since the contact surface of the spacer 8 on the side of the caliper half 5b is subjected to insulation treatment, electrolytic corrosion can be prevented even if both are different metals.

Further, by changing the thickness of the spacer 8, the caliper halves 5a and 5b can be used for various models having different disk thicknesses and pad thicknesses as in the conventional case, and the angle of the spacer 8 can be changed. As a result, it is possible to deal with the degree of wear caused by the difference in strength due to the material of the lining and the thickness of the back plate.

The caliper halves are not limited to those of different metals, but may be of the same type of metal, and the material of the spacer is not particularly limited to aluminum alloy. Further, insulation treatment may be applied to a predetermined place as necessary.

[0020]

As described above, according to the present invention, the spacer interposed on the dividing surface of the caliper body is formed in a wedge shape so that the thickness increases from the inner peripheral side of the disc toward the outer peripheral side of the disc, and the reaction force is increased. Between the claw and the friction pad that is pushed by the reaction claw,
By setting the gap that expands toward the outer peripheral side of the disc, even if the caliper body is deformed during braking, uneven wear of the lining can be effectively prevented.

Further, by changing the thickness of the spacer, the same caliper half can be used for various models having different disk thicknesses and pad thicknesses, and by changing the angle of the spacer, the material of the lining and the back plate can be changed. It is possible to deal with the degree of wear caused by the strength difference due to the thickness.

Further, since the spacer is subjected to the insulation treatment, even if the caliper half and the spacer are made of different metals, electrolytic corrosion can be prevented and durability can be improved.

[Brief description of drawings]

FIG. 1 is a sectional view taken along line I-I of FIG.

FIG. 2 is a partially sectional front view of a vehicle disc brake showing an embodiment of the present invention.

[Explanation of symbols]

1 ... Disc brake, 2 ... Bracket, 3 ... Disc rotor, 4 ... Sliding pin, 5 ... Caliper body, 5a, 5
b ... caliper half, 5c ... cylinder hole, 5d ... reaction force claw,
6 ... Friction pad, 6a ... Lining, 6b ... Back plate, 7 ...
Hanger pin, 8 ... Spacer, 9 ... Connecting bolt, 10 ...
Cylinder

Claims (2)

[Scope of utility model registration request] 1. A spacer is provided from the outside of the disk rotor on one of the two caliper halves divided on both sides of the disk rotor so as to have a cylinder hole, and on the other of the two caliper halves having reaction pawls. In a split type caliper body of a vehicle disc brake in which both caliper halves are connected by interposing, the spacer is formed in a wedge shape so as to become thicker from the disc inner peripheral side toward the disc outer peripheral side, and A split caliper body for a vehicle disc brake, characterized in that a gap that expands toward the outer peripheral side of the disc is set between the force pawl and the friction pad that is pushed by the reaction pawl. 2. The split caliper body for a vehicle disc brake according to claim 1, wherein the caliper bodies are made of different metals, and the spacers are insulated.