JPH0526343Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a disc brake for a vehicle with improved caliper rigidity.

[Conventional technology]

The caliper of a disc brake is a pair of friction pads arranged on both sides of the disc rotor, and the pushing part that pushes one side and the pushing part that pushes the other are connected at the outer periphery of the disc rotor. During braking, the inner circumferential side of the disc rotor of the caliper tends to separate from the disc rotor due to the reaction force that pushes the friction pad.

For this reason, the disc brake shown in Japanese Utility Model Application Publication No. 63-147940 has a caliper half with a piston that pushes one friction pad, and a caliper half with a piston that pushes the other friction pad. are connected by bolts on the outer periphery of the disc rotor, and the inner periphery of the disc rotor of both caliper halves is prevented from separating from the disc rotor by increasing the thickness on the outer periphery of the disc rotor from the bolt connection part. are doing.

[The problem that the idea attempts to solve]

However, with the above configuration, if an attempt is made to increase the size of the disc rotor, for example, the outer circumferential side of the disc rotor of the caliper is thick, which interferes with the space on the inner circumference of the wheel where the caliper is placed, making it difficult to install the caliper. If the built-up portion is made thinner, problems will arise with the rigidity of the caliper.

Therefore, the object of the present invention is to provide a disc brake for a vehicle, which can ensure the rigidity of the caliper even if the outer circumferential side of the caliper is made thinner than the bolt connection part of the caliper, and improves the degree of freedom in design.

[Means to solve the problem]

In order to achieve the above object, the present invention arranges a caliper half that pushes one of a pair of friction pads facing each other on both sides of the disc rotor, and a caliper half that pushes the other half on the outer peripheral side of the disc rotor. In a vehicle disc brake having calipers connected by bolts, a reinforcing plate covering at least an outer surface of each of the caliper halves is formed of a material having higher rigidity than the caliper halves, and the reinforcing plate is connected to the bolts. It is characterized by being fastened to each half of the caliper.

[Effect]

With this configuration, the rigidity of each caliper half is strengthened by the reinforcing plate, and the inner peripheral side of the disc rotor of both caliper halves is prevented from separating from the disc rotor due to the reaction force that pushes the friction pad during braking operation. do. In addition, the reinforcement plate
By extending the support arm for attaching the caliper to the vehicle body side bracket, the rigidity of the caliper bracket attachment part can be increased.Furthermore, the reinforcement plate is provided with a support piece that supports the inner peripheral side of the disc rotor of the friction pad. By extending the friction pad, positioning when assembling the friction pad becomes easier.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

1 to 4 show a first embodiment of the present invention, in which a disc brake 1 has an opposed piston type caliper 2 made of aluminum alloy.
A pair of friction pads 4 and 5 are arranged opposite to each other on both sides of the disc rotor 3, and a first caliper half 6 pushes one friction pad 4, and a second caliper half body 6 pushes the other friction pad 5. The half body 7 is connected to the disk rotor 3 by four bolts 8 arranged around the outer periphery of the disk rotor 3.

The first caliper half 6 has two cylinder holes 6a.
and a mounting arm 6b for attaching to the vehicle body side bracket, a piston 9 is fitted into each cylinder hole 6a in a fluid-tight and movable manner, and a hydraulic pressure chamber is defined between the bottom of the cylinder hole 6a and the piston 9. 10, supply port 1
The piston 9 is advanced by the pressure fluid supplied from the piston 1 to press the friction pad 4 against the disc rotor 3.

The second caliper half 7 has two cylinder holes 7a.
A piston 12 is fluid-tightly and movably inserted into each of the cylinder holes 7a and 12, and a communication path is established from the hydraulic chamber 10 to the first caliper half 6 to the hydraulic chamber 13 defined between the bottom of the cylinder hole 7a and the piston 12. The piston 12 is moved forward by the pressure fluid supplied through the piston 14 to press the friction pad 5 against the disc rotor 3.

Furthermore, relatively thick reinforcing plates 15 made of iron are provided on the outer surfaces of the first caliper half body 6 and the second caliper half body 7, respectively.

This reinforcing plate 15 is connected to the first caliper half 6
and a main body portion 1 that covers the outer surface of the second caliper half body 7
5a, and a fastening portion 15 for fastening to the first caliper half 6 and the second caliper half 7 with bolts 8 on the outer peripheral side of the disc rotor 3 of the main body portion 15a.
b, 15b, and an insertion portion 15c for the hanger pin 16 for suspending the friction pads 4, 5,
The friction pads 4 and 5 are bent on the inner circumference side of the disk rotor 3 along the first caliper half body 6 and the second caliper half body 7, and are in contact with the inner circumference side of the disk rotor 3 of the friction pads 4 and 5. A support piece 15d that supports
15d.

By fastening the reinforcing plate 15 formed in this manner to the outer surface of the first caliper half 6 and the outer surface of the second caliper half 7 with bolts 8, the reinforcing plate 15 is attached to the caliper 2 made of aluminum alloy. Since it is made of iron, which has higher rigidity than the first caliper half body 6 and the second caliper half body 7, the inner peripheral side of the disc rotor 3 is caused by the reaction force that pushes the friction pads 4 and 5 during braking operation. prevent you from leaving.

Therefore, the rigidity of the caliper 2 can be ensured without making the outer circumferential side of the disc rotor 3 thicker than the bolts 8 of the caliper 2, and restrictions on the arrangement space due to the larger diameter of the disc rotor 3 can be addressed.

Furthermore, when the friction pads 4 and 5 are assembled, the support pieces 15d and 15d of the reinforcing plate 15 that support the friction pads 4 and 5 come into contact with the disk rotor 3 side of the friction pads 4 and 5, , 5 to facilitate insertion of the hanger pin 16 into the friction pads 4, 5.

Furthermore, a hanger pin 16 is attached to the reinforcing plate 15.
By forming the insertion portion 15c, it is not necessary to form a hanger pin insertion portion in the first caliper half body 6 and the second caliper half body 7. The processing becomes easier.

5 and 6 show a second embodiment of the present invention, in which a reinforcing plate 20 fastened to the first caliper half 6 with bolts 8 is attached to the first caliper half 6.
a main body portion 20a that covers the outer surface of the main body portion 20a;
A fastening part 20 for fastening to the first caliper half 6 with a bolt 8 is provided on the outer peripheral side of the disc rotor 3.
b, 20b, and an insertion portion 20c for the hanger pin 16 for suspending the friction pads 4, 5,
Further, a support arm 20d that covers the mounting arm 6b of the first caliper half 6 to the vehicle body side bracket is extended from one fastening portion 20b, and is attached to the first caliper half 6 on the inner peripheral side of the disc rotor 3. a support piece 20e that is bent along the friction pads 4, 5 and supports the friction pads 4, 5 by coming into contact with the inner peripheral side of the disc rotor 3;
20e.

Thereby, the rigidity of the attachment arm 6b of the first caliper half 6 to the vehicle body side bracket can be increased.

In each of the above embodiments, a disc brake having an opposed piston type caliper was explained, but the present invention can also be applied to a floating type caliper connected by bolts, and the reinforcing plate may be made of a highly rigid material such as titanium alloy. material may be used.

[Effect of idea]

As described above, the present invention is a disc brake having a caliper that connects two caliper halves with bolts, in which a reinforcing plate covering each of the caliper halves is made of a material having higher rigidity than the caliper halves. , since the reinforcing plate was fastened to each caliper half using the bolt,
To prevent the inner peripheral side of the disc rotor of both caliper halves from separating from the disc rotor due to a reaction force pushing a friction pad during braking operation.
In addition, by extending the support arm part for attaching the caliper to the vehicle body side bracket to the reinforcing plate, the rigidity of the caliper bracket attachment part can be increased. By extending the support pieces that support the sides, positioning when assembling the friction pad becomes easier.

[Brief explanation of drawings]

1 to 4 show a first embodiment of the present invention, in which FIG. 1 is a plan view of the disc brake, FIG. 2 is a front view, FIG. 3 is a cross-sectional view of FIG. The figure is a cross-sectional view of FIG. 1, FIGS. 5 and 6 show a second embodiment of the present invention, FIG. 5 is a plan view of the disc brake, and FIG. 6 is a front view. 1... Disc brake, 2... Caliper, 3
... Disc rotor, 4, 5 ... Friction pad, 6
...First caliper half, 7...Second caliper half, 8...Bolt, 15, 20...Reinforcement plate.

Claims (1)

[Claims for Utility Model Registration] 1. A caliper half that pushes one of a pair of friction pads that are arranged opposite to each other on both sides of the disc rotor, and a caliper half that pushes the other half are arranged on the outer peripheral side of the disc rotor. In a vehicle disc brake having calipers connected by bolts, a reinforcing plate covering at least an outer surface of each of the caliper halves is formed of a material having higher rigidity than the caliper halves, and the reinforcing plate is connected to the bolts. A disc brake for a vehicle, characterized in that each caliper half is fastened to the other half. 2. The disc brake for a vehicle according to claim 1, wherein the reinforcing plate has a support arm extending therefrom for attaching the caliper to a vehicle body side bracket. 3. The disc brake for a vehicle according to claim 1 or 2, wherein the reinforcing plate is provided with a supporting piece extending from the inner peripheral side of the disc rotor of the friction pad.