JPH0221453B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a floating caliper type disc brake, and more particularly to a pad support structure using anchor pins.

A caliper body that straddles the rotor is supported in a floating manner on a support fixed to a non-rotating part of the vehicle, and is supported by a caliper forearm located on the other side of the rotor and a caliper rear arm located on one side of the rotor, respectively. In floating caliper type disc brakes, which generate braking force by pinching the rotor that rotates with the wheel between the outer pad and the inner pad, conventionally, for example, an anchor pin is fixed between the forearm of the caliper and the rear arm of the caliper, and is straddled. , slide the outer pad and the inner pad on the anchor pin,
In addition, the braking torque generated in both pads during braking is transmitted from the carrier body to the support. In the case of such a pad support structure using anchor pins, since the anchor pin is placed across the forearm and rear arm of the caliper, the anchor pin is located outside the rotor, and is particularly suitable for railway vehicles using multiple cylinders. In the case of large floating caliper type disc brakes used in This resulted in excessive torque being applied to the guide pin.

The present invention was made in view of the above-mentioned circumstances, and includes fixing the back metal of the outer pad to the forearm of the caliper, fixing the back metal of the inner pad to the pad mounting plate, and fixing the anchor pin fixed to the pad mounting plate to the rear arm of the caliper. It is an object of the present invention to provide a floating caliper type disc brake which eliminates the above-mentioned drawbacks by being a cantilever type and sliding.

Embodiments of the floating caliper type disc brake according to the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, 1 is a carrier body, and 2 is a support fixed to a non-rotating part of the vehicle. The carrier body 1 has multiple guide pins 3
The rotor is slidably supported by a support 2 in the axial direction of the rotor. Each 4 is the rear arm 1a of Kyaripa body 1
A piston is fitted into the cylinder so that it can move forward and backward in the axial direction of the rotor, and the end surface of the piston on the rotor side is in contact with a pad mounting plate 6, which will be described later.
At both ends of the inner pad 5, ears 5a' of an inner pad back metal 5a and ears 6a of a pad mounting plate 6 are removably fixed with bolts 7. Reference numeral 8 designates an anchor pin, and an annular seat 8a is provided at the tip thereof, and the pad is mounted by fitting the annular seat 8a into the counterbore 6b of the pad mounting plate 6 and bringing its top surface 8b into contact with the inner pad back metal 5a. It is fixed to the plate 6, and its shaft portion 8c is fitted into an opening 1c provided in the rear arm 1a of the caliper body so as to be slidable in the rotor axial direction (see FIG. 3). Thus, the pad mounting plate 6 is provided with a plurality of anchor pins 8 that are spaced apart in the circumferential direction of the rotor and extend in the axial direction of the rotor. Reference numeral 9 designates an outer pad, and an outer pad back metal 9a is fixed to the forearm 1b of the carrier body with bolts 10 at ears 9a' at both ends thereof. 1
1 is between the support 2 and the outer pad 9.
1 is a centering device for the carrier body 1 provided between the support 2 and the inner pad 5, and 13 is a rotor.

In this embodiment, the carrier body 1 is composed of a single member, but the rear arm 1a
and forearm 1b are divided to form both arms 1a and 1b.
It can also be configured by combining.

Next, the effect will be explained.

When pressure oil is introduced into each cylinder 4 from the outside, the inner pad 5 that contacts the piston with its mounting plate 6
is pushed out and comes into sliding contact with the rotor 13, and in response to the reaction force, the outer pad 9 is guided by each guide pin 3 and comes into sliding contact with the disc rotor 13 to generate a braking force. At this time, the anchor pin 8 fixed to the pad mounting plate 6 fixed to the inner pad 5 slides in the opening 1c drilled in the rear arm of the caliper and protrudes slightly, thereby transferring the braking torque applied to the inner pad 5 to the caliper body 1. The information is transmitted to Support 2 via On the other hand, the braking torque applied to the outer pad 9 is transmitted to the support 2 from the forearm 1b of the carrier body. When the brake is released, if the pressure oil is discharged from each cylinder 4, the restoring elastic force of the seal member of the piston (not shown) built in the cylinder 4 and the centering mechanism 11,
12, the anchor pin 8 retreats into the opening 1c of the rear arm of the caliper.

The structure of the present invention is such that the caliper body that straddles the rotor is provided with a caliper rear arm on one side of the rotor, and the caliper rear arm is provided with a cylinder into which a piston is fitted so as to be movable forward and backward in the rotor axial direction, and the end surface of the piston on the rotor side is in contact with the pad mounting plate, the other side of the caliper body is equipped with a caliper forearm, the caliper forearm is in contact with the outer pad back metal, and the caliper body is mounted in the rotor axial direction with a guide pin against a support fixed to a non-rotating part of the vehicle. A disc brake is slidably supported on a pad mounting plate, and an inner pad back metal is removably fixed to a pad mounting plate, and the pad mounting plate has a plurality of anchor pins spaced apart in the circumferential direction of the rotor and extending in the axial direction of the rotor. The anchor pin is a disc brake that fits into an opening provided in the rear arm of the caliper so as to be slidable in the axial direction of the rotor.

Therefore, by fixing the anchor pin to the pad mounting plate of a thick plate, the structure is made to withstand braking torque, and by inserting the anchor pin in a cantilevered manner into the carrier body so as to be able to slide freely, the mounting position of the anchor pin can be adjusted to the position of the carrier body. Since it could be placed closer to the center, the carrier body and pad back metal could be made smaller than before, making them easier to handle and to install and remove from the vehicle.

Furthermore, since the point of action of the resultant braking friction force between both pads and the rotor is closer to the guide pin, there is no need to worry about excessive torque being applied to the guide pin. In addition, the disc brake according to the present invention includes a pad mounting plate, to which the inner pad back metal is removably fixed, and includes an anchor pin. Therefore, during braking operation, the pressing force of the piston does not act directly on the inner pad back metal, but rather through the pad mounting plate, so the inner pad back metal is not required to have a high degree of rigidity. As a result, the inner pad back metal is made thinner and therefore lighter, and the inner pad replacement work becomes easier. Also, when replacing the inner pad, there is no need to remove the anchor pin from the rear arm of the caliper; you can simply remove the inner pad back metal from the pad mounting plate and reinstall it.
It has excellent workability because it does not involve centering work of anchor pins. Furthermore, since the inner pad back metal is removably fixed to the pad mounting plate, there is no need for high-precision machining of the anchor pins on the inner pad back metal, and the precision with respect to the anchor pins is limited to the pad mounting plate, which is not affected by heat during the manufacturing process. required. Therefore, it is easy to manufacture the pad mounting plate, and the pad mounting plate can be reused when replacing the inner pad, allowing effective use of parts.

[Brief explanation of drawings]

FIG. 1 is a front view of an embodiment of a floating caliper type disc brake according to the present invention, FIG. 2 is a partially cutaway plan view of the same, and FIG. 3 is an enlarged sectional view showing attachment of an anchor pin. 1... Caliper body, 1a... Caliper's rear arm, 1b... Caliper's forearm, 1c... Caliper's rear arm opening, 2... Support, 3... Guide pin,
4...Cylinder, 5...Inner pad, 5a...
Inner pad backing metal, 5a'...Ear part of inner pad backing metal, 6...Pud mounting plate, 6a...Ear part of pad mounting plate, 6b...Spot facing part of pad mounting plate,
7, 10...Bolt, 8...Anchor pin, 8a...
... Annular seat of the anchor pin, 8b... Top surface of the anchor pin, 8c... Shaft of the anchor pin, 9... Outer pad, 9a... Outer pad back metal, 9a'... Ear part of the outer pad back metal, 13... Rotor.

Claims (1)

[Claims] 1 The caliper body that straddles the rotor is equipped with a caliper rear arm on one side of the rotor, and the caliper rear arm is provided with a cylinder that fits a piston so that it can move forward and backward in the rotor axial direction, and the end surface of the piston on the rotor side is attached to the pad mounting plate. The other side of the caliper body is equipped with a caliper forearm, and the caliper forearm abuts the outer pad back metal, and the caliper body can slide in the rotor axial direction with a guide pin against a support fixed to a non-rotating part of the vehicle. It is a supported disc brake, in which an inner pad back metal is removably fixed to a pad mounting plate, and the pad mounting plate is provided with a plurality of anchor pins spaced apart in the circumferential direction of the rotor and extending in the axial direction of the rotor. A disc brake that is fitted into an opening provided in a rear arm of a caliper so as to be slidable in the axial direction of a rotor.