JPH0754670Y2 - Disc brake - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a disc brake.

[Prior Art] Conventionally, a disc brake is mounted on a vehicle fixing member such as a carrier provided across a disc plate and slidably in a direction intersecting the disc plate across the disc plate. It consists of a supported caliper.

The caliper has a cylinder on one side of the disc plate, on which a piston facing the disc plate can be slidably fitted via a brake pad, and the brake pad on the other side of the disc plate. The claw portions that face each other are formed.

Then, when oil is supplied to the cylinder of the caliper, the piston moves toward the disc plate and presses the brake pad against one side of the disc plate, and accordingly, the caliper itself is in a direction opposite to the moving direction of the piston. By moving to, the claw portion presses the brake pad against the disc plate, and the disc plate is clamped by each brake pad for braking.

[Problems to be Solved by the Invention] Generally, a so-called brake squeal phenomenon that occurs when a brake is actuated is caused by the fact that the bending mode of the brake pad and the mode of the combination of the deformations of the claws match. It is believed to occur.

However, in the above-mentioned conventional caliper, since it is necessary to release the cutting tool for machining the cylinder performed from the outside, the claw portions can be provided only on both ends, and the combination mode of the deformation of the claw portions becomes simple. There was a possibility that the combination mode of the deformation of the claws and the bending mode of the brake pad would match, and the occurrence rate of brake squeal was high.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a disc brake in which brake squeal hardly occurs even when the brake is operated.

[Means for Solving the Problems] A disc brake according to a first aspect of the present invention is a two-piece type caliper including a cylinder bore caliper portion and a claw caliper portion, and the two-piece type caliper in a direction intersecting with the disc plate. In a disc brake composed of a vehicle fixing member that slidably supports the disc plate at a position that straddles the disc plate, a piston facing the one side surface of the disc plate via a brake pad is provided in the cylinder bore caliper portion. One cylinder that can be slidably fitted is formed, and three or more claw portions that abut the brake pad are formed on the surface of the claw caliper portion facing the brake pad. .

The disc brake of the second invention is characterized in that a thin portion for connecting the claw portions is provided between the claw portions of the first invention.

The disc brake of the third invention is characterized in that a space portion is formed between the contact surface of the brake pad with which the claw portion of the second invention contacts and the thin portion of the second invention. There is.

[Operation] According to the disc brake of the first invention, the caliper is
Since it is composed of the claw caliper part and the cylinder bore caliper part, the claw caliper part and the cylinder bore caliper part can be manufactured separately. It is not necessary to remove the bite, and the claw portions can be formed at both ends and the center of the claw caliper portion.

This makes it possible to reduce the number of combinations of the deformations of the claws to match the bending mode of the brake pad, and to reduce the so-called brake squeal phenomenon that occurs when the brake is operated. it can.

According to the disc brake of the second invention, the thin portions provided between the claw portions increase the rigidity of each claw portion, and the vibration of the claw portions can be suppressed.

According to the disc brake of the third invention, since the space is formed between the thin portion and the contact surface of the brake pad, when the brake is operated, the contact surface of the brake pad is uneven. It is possible to prevent the brake pad from being adversely affected, and as a result, it is possible to prevent uneven contact of the brake pad and prevent uneven wear.

[Embodiment] An embodiment of the disc brake of the present invention will be described below with reference to FIGS.

In the figure, reference numeral 1 is a caliper (two-piece type caliper).
Is. The caliper 1 is composed of a pawl caliper portion 2 and a cylinder bore caliper portion 3, and the pawl caliper portion 2 and the cylinder bore caliper portion 3 are connected by a plurality of tie bolts 4, 4.

Then, in the cylinder bore caliper portion 3 of the caliper 1,
A cylinder 12 is formed in which a piston 11 opposed to the side surface Da of the disc plate D via a brake pad 6a is slidably fitted. Further, the claw caliper portion 2 of the caliper 1 has three claw portions which respectively face the other end Db of the disc plate D via the brake pad 6b at the tip thereof.
7,7,7 are formed.

Here, since the caliper 1 is composed of the claw caliper portion 2 and the cylinder bore caliper portion 3, the claw caliper portion 2 and the cylinder bore caliper portion 3 can be manufactured separately, and therefore, the claw caliper portion can be manufactured. It is not necessary to allow the bite for forming the cylinder 12 to the cylinder bore caliper portion 3 to be released in the portion 2, and the pawl portions 7, 7, 7 can be formed at both ends and the center of the pawl caliper portion 2, respectively.

The caliper 1 thus configured is supported by the carrier (vehicle fixing member) 5 via the slide pins 8 and 8 so as to be slidable in a direction crossing the disk plate D in a position across the disk plate D. ing.

According to the disc brake having the above structure, when the brake oil is supplied from the master cylinder (not shown) connected to the pipe portion 9, the piston in the cylinder bore caliper portion 3 is
By moving 11 in the direction of the disc plate D, the brake pad 6a between the piston 11 and the disc plate D is pressed against one side surface Da of the disc plate D. Along with this, the entire caliper 1 slides in the direction of arrow A in the figure, and the brake pads 6b are pressed against the other side surface Db of the disc plate D by the claw portions 7, 7, 7 formed on the claw caliper portion 2. D
Is clamped by the brake pads 6a and 6b and braked.

At this time, since the three claw portions 7, 7, 7 are formed in the claw caliper portion 2, there are various types of combinations of deformation of the claw portions 7, 7, 7, and the brake pad 6 Matching with the bending mode can be extremely reduced, and the brake squeal phenomenon can be made less likely to occur.

Further, as shown in FIG. 4, the claw portion 7 of the claw caliper 2 is
As shown in FIG. 5, a thin portion 10, 7
It is provided with 10.

By providing the plate portions 10, 10 between the claw portions 7, 7, 7 in this manner, the rigidity of the claw portions 7, 7, 7 is increased, and the claw portions 7, 7, 7
Vibration can be suppressed.

In addition, as shown in FIG. 6, between the contact surface 6b 'of the brake pad 6b with which the claw portions 7,7,7 abut and the thin wall portions 10 and 10, the same area as the thin wall portions 10 and 10 is provided. The space portions 13, 13 having the are formed.

That is, the contact surface 6b ′ between the thin portions 10, 10 and the brake pad 6b.
By forming a space 13,13 between the claws 7,7,7
Can be brought into contact with the contact surface 6b 'of the brake pad 6b. Therefore, the rigidity of the claw portions 7, 7, 7 can be increased and the contact surface 6b of the brake pad 6b can be increased when the brake is operated. It is possible to make it less likely to be adversely affected by the unevenness of ′, and consequently prevent the brake pad 6b from hitting one side,
Uneven wear can be prevented. Also, the flat surface of the portion of the brake pad that contacts the contact surface 6b 'is processed by the claws 7,7,7.
Can only be.

Further, according to the disc brake of the above-described embodiment, since the caliper 1 is a two-piece type caliper composed of two members, the claw caliper part 2 and the cylinder bore caliper part 3, the claw caliper part 2 is made of iron or the like. A material having high rigidity can be used, and a lightweight material such as aluminum can be used for the cylinder bore caliper portion 3. Therefore, the weight of the entire disc brake can be reduced without reducing the rigidity of the pawl caliper portion 2.

In the above embodiment, the nail caliper portion 2 has three nail portions 7,
Although 7 and 7 are formed, the number of the claw portions is not limited to the embodiment and may be three or more.

[Effects of the Invention] As described above, according to the disc brake of the present invention, the following effects can be obtained.

． Since the caliper is composed of the claw caliper section and the cylinder bore caliper section, the claw caliper section and the cylinder bore caliper section can be manufactured separately,
Therefore, it is not necessary to remove the bite for forming the cylinder in the cylinder bore caliper portion in the claw caliper portion, and the claw portions can be formed at both ends and the center of the claw caliper portion. As a result, it is possible to make the number of combinations of the deformations of the claws different from each other and to extremely reduce the matching with the bending mode of the brake pad, thereby making it difficult to cause a so-called squeaking phenomenon that occurs when the brake is operated. it can.

In addition, since the claw caliper part can be made of a material with high rigidity and the cylinder bore caliper part can be made of a light material, the weight of the disc brake can be reduced without reducing the rigidity of the claw caliper part. Therefore, the fuel efficiency of the vehicle can be improved.

． Since the thin-walled portions that connect the respective nails are formed between the nails, the thin-walled portions increase the rigidity of the nails and suppress the vibration of the nails.

． Since a space is formed between the thin portion and the contact surface of the brake pad, when the brake is operated, it is possible to prevent it from being adversely affected by the unevenness of the contact surface of the brake pad. Moreover, it is possible to prevent uneven contact of the brake pad and prevent uneven wear. Further, the flat surface of the portion that contacts the contact surface of the brake pad can be processed only by the claw portion, and the productivity can be improved.

[Brief description of drawings]

1 to 6 are views for explaining the disc brake of the present invention. FIG. 1 is a front view of the disc brake of the present invention, FIG. 2 is a plan view of the disc brake, and FIG. 3 is a disc brake. FIG. 4 is a front view of a disc brake having a claw caliper portion of another structure, and FIG. 5 is a cross-sectional view of a claw caliper portion of another structure, taken along line XX. FIG. 6 and FIG. 6 are also XX cross-sectional views of the pawl caliper portion with a cross-sectional view of a part of the pawl caliper portion having another structure. 1 ... Caliper (2-piece type caliper), 2 ... Claw caliper part, 3 ... Cylinder bore caliper part, 6a, 6b ... Brake pad, 7 ... Claw part, 11 ... Piston, 12 ... Cylinder, 10 ...... Thin section, 13 ...... Space section, D ...... Disc plate, Da ...... one side, Db ...... other side.

Claims (3)

[Scope of utility model registration request] 1. A two-piece type caliper composed of a cylinder bore caliper section and a claw caliper section, the two-piece type caliper being slidable in a direction intersecting with the disc plate and at a position straddling the disc plate. In a disc brake composed of a vehicle fixing member that supports, in the cylinder bore caliper portion, one cylinder is formed in which a piston facing one side surface of the disc plate via a brake pad is slidably fitted. The disc brake is characterized in that three or more claw portions that abut the brake pad are formed on a surface of the claw caliper portion facing the brake pad. 2. The disc brake according to claim 1, wherein a thin wall portion connecting the claw portions is provided between the claw portions. 3. The disc brake according to claim 2, wherein a space portion is formed between the contact surface of the brake pad with which the claw portion abuts and the thin portion.