JP2557636Y2 - Caliper of 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 of a disc brake used for various traveling vehicles such as motorcycles, and more specifically, a working portion having a cylinder hole, a reaction portion, and a disk rotor. The present invention relates to a caliper of a disc brake for a vehicle, which is integrally formed by casting with a bridge portion that connects over an outer periphery.

[0002]

2. Description of the Related Art In a caliper of a disk brake for a vehicle, a working portion having a cylinder hole, a reaction portion, and a bridge portion connecting these over the outer periphery of the disk rotor are integrally formed by casting to improve rigidity. Cast a plate-shaped rigid reinforcing member over the reaction part and bridge part for the purpose of
A known material is known (JP-A-62-56631).
Reference).

[0003]

However, in the conventional caliper, the rigidity of the reaction portion and the bridge portion is improved, but the rigidity of the action portion is still low.
At the time of braking, the action section bends with high-pressure brake fluid, giving a sense of braking.
Damage and increase the overall durability of the caliper
There is a problem that can not be .

The present invention has been made in view of such circumstances, and its purpose is to cast a working portion, a reaction portion, and a bridge portion connecting these over the outer periphery of a disk rotor. In the caliper of a disc brake for a vehicle, which is integrally molded with the
Easier drilling after casting while improving braking sensation
It is to provide a structure capable of performing the.

[0005]

According to the present invention, a working portion having a cylinder hole, a reaction portion, and a bridge portion connecting these over the outer periphery of a disk rotor are integrally formed by casting.
In forming, the caliper of <br/> disc brake for a vehicle, which is formed by insert casting a rigid reinforcing member, the rigid
The reinforcing member includes a plate-shaped portion extending from the reaction portion to the action portion across the bridge portion, and a reinforcing member extending from the bottom wall to the peripheral wall of the cylinder hole.
And enclosing the bottom wall of the cylinder hole of the enclosure
Form a through hole for the brake fluid introduction hole in the part to be wrapped
A hole for the brewer hole in the peripheral wall
Characterized in that the through holes are formed .

[0006]

In accordance with the above configuration, the rigidity of the reacting portion and the bridge portion is reinforced by a plate-shaped portion of the rigid reinforcing member that IG Rumi the reacting portion and the bridge portion, are in the bottom wall and a peripheral wall of the cylinder bore
The rigidity of the working part is reinforced by the loose enclosure. Ki
After the casting of the caliper, on the bottom wall and the peripheral wall of the cylinder hole,
The brake fluid introduction hole and the blender hole are
It is formed through a through hole previously formed in the enclosure.

[0007]

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

The caliper 1 has an action portion 3 and a reaction portion 4 arranged on both sides of a disk rotor 2 which rotates integrally with the wheels.
And a bridge portion 5 connecting the action portion 3 and the reaction portion 4 across the outer periphery of the disk rotor 2 are integrally formed by casting using a light metal such as aluminum. Also,
The reaction part 4 is composed of a gate-shaped reaction force claw.

A piston 6 is inserted into a cylinder hole 3a provided in the working section 3, and a pair of discs is provided between the disc rotor 2 and the working section 3 and between the disc rotor 2 and the reaction section 4. Friction pads 7, 7 are arranged respectively.

The caliper 1 extends from the reaction portion 4 to the working portion 3 across the bridge portion 5 and further to the cylinder hole 3.
It is cast integrally with the rigid reinforcing member 8 surrounding the bottom wall 3b and a peripheral wall 3c of a and viewed Ru Ig <br/>.

[0011] rigid reinforcing member 8 is formed by, for example, iron plate having a high rigidity, the claw portions boot from the gate-shaped reaction portion 4
A plate-like portion 8a bent in cross-section substantially L-shaped lead to the working portion 3 over a ridge 5, a bottomed cylindrical enclosure leading to a peripheral wall 3c of the bottom wall 3b of the cylinder hole 3a formed in the working portion 3 and a part 8b, a plate-like portion 8a and the enclosing portions 8b are integrally connected.

Further, the plate-like portion 8a and the enclosing portions 8b, acting portion 3 by these being separated from each other, a plurality of permeability for binding the inner layer and the outer layer of the reacting portion 4 and the bridge part 5 A hole 8c is formed.

Furthermore, the bottom of the cylinder hole 3a of the enclosure 8b
The through hole 8c formed in the part that is cast into the wall 3b is
It is used to form the rake liquid introduction hole 8d,
The brake fluid introduction hole 8d processed after the molding of the
Through the through hole 8c for the brake fluid introduction hole to the bottom wall 3b.
And raised by a separate hydraulic master cylinder (not shown)
The pressurized brake fluid is led to the hydraulic chamber 9 at the bottom of the cylinder hole.
Enter. In addition, it is formed in a portion that is cast into the peripheral wall 3c.
One of the through holes 8c is used to form a blender hole 8e.
Brewed after the molding of the caliper 3
The through hole 8e is formed through the through hole 8c for the blender hole.
Penetrated through the wall 3c and mixed with the brake fluid in the hydraulic chamber 9
Exhaust air to the outside.

[0014] Since this embodiment is constructed as described above, the action and reaction section 4 by the plate-like portion 8a of the reacting portion 4 and over the bridge portion 5 cast to the action unit 3 Guru Mishita rigid reinforcing member 8 The rigidity between the portions 3 is enhanced, and the rigidity of the action portion 3 is enhanced by the surrounding portion 8b surrounding the bottom wall 3b and the peripheral wall 3c of the cylinder hole 3a.

In particular, the action portion 3 is formed on the bottom wall 3 of the cylinder hole 3a.
Since b and the entire peripheral wall 3c are surrounded by the bottomed cylindrical enclosure 8b, the effect of reinforcing the rigidity is extremely large. Accordingly, the rigidity of the caliper 1 as a whole is reinforced and the durability is improved , and an excellent braking feeling with a sense of rigidity can be obtained.
Will be able to do it. In addition, the entire caliper 1 is formed of a light alloy such as aluminum, so that the caliper 1 has sufficient rigidity while reducing the weight.

Further, the caliper 3 after forming is post-processed.
The brake fluid introduction hole 8d and the blender hole 8e are
Each of the through holes 8c of the enclosing portion 8b cast into 3a
Formed through the hole, the brake fluid introduction hole 8d and the
The processing tool for drilling 8e is surrounded only by passing through the through hole 8c.
The cutting tool 8b does not need to be cut,
Or changing the feed speed or rotation speed of the processing tool.
There is no need to change the processing conditions, and the
It is only necessary to operate the machine under the same machining conditions.
No.

In the embodiment described above, the cylinder 3 is
Enclosed portion 8b which is cast around hole 3a is cylindrical with bottom
However, the entire surface of the peripheral wall 3d of the cylinder hole 3a is not necessarily
There is no need to cover, for example, the upper and lower sides of
It has a U-shaped cross section that covers the bottom wall 3b of the cylinder hole 3a.
However, almost the same effect can be obtained. In the above-described embodiment, the enclosing portion 8b cast into the working portion 3 and the plate-shaped portion 8a cast into the reaction portion 4 and the bridge portion 5 are formed.
Are integrally connected to each other, so that the rigidity of the entire caliper 1 can be further improved. However, each of these may be cast as a single unit.

[0018]

[Effect of the invention] The rigidity of the caliper of the present invention
As described above , the reinforcing member includes a plate-shaped portion extending from the reaction portion to the operation portion across the bridge portion, and an enclosing portion extending from the bottom wall of the cylinder hole of the operation portion to the peripheral wall , The enclosure
Brake fluid is introduced into the part that is cast into the bottom wall of the cylinder hole
Form a through hole for the hole and insert into the peripheral wall
Since the through hole for the blender hole is formed in the part, the rigidity of the entire caliper can be improved, and the durability is improved.
As well as providing a rigid braking feeling
Become like Also, the post-processed caliper on the caliper after molding
The rake liquid introduction hole and the blender hole are
Formed through the through hole of the enclosed enclosure,
The processing tool that drills the blender hole passes through this through hole
It is not necessary to cut the rigid reinforcing member only with
Change to other special items, or change the feed speed or
No need to change machining conditions such as number of turns
Can be operated with the same machining conditions as before,
Does not impair workability.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a disc brake showing one embodiment of the present invention.

FIG. 2 is a perspective view of a rigid reinforcing member.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Caliper, 2 ... Disk rotor, 3 ... Working part, 3a
... Cylinder hole, 3b ... Bottom wall, 3c ... Peripheral wall, 4 ... Reaction part, 5 ... Bridge part, 8 ... Rigid reinforcing member, 8a ... Plate part, 8b ... Enclosure part , 8c ... Through hole, 8d ... Brake fluid introduction
Hole, 8e ... Brewder hole

Claims (1)

(57) [Scope of request for utility model registration] 1. A rigid reinforcing portion for integrally forming a working portion having a cylinder hole, a reaction portion, and a bridge portion connecting these over the outer periphery of a disk rotor by casting.
In the caliper of a vehicle disk brake formed by casting a material, the rigid reinforcing member includes a plate-shaped portion extending from the reaction portion to a working portion across a bridge portion and a bottom wall of the cylinder hole to a peripheral wall. and a surrounding portion extending,該囲physician
Brake on the part that is cast into the bottom wall of the cylinder bore
Form a through hole for liquid introduction hole and insert into said peripheral wall
A caliper for a disc brake for a vehicle , wherein a through hole for a blender hole is formed in a portion to be formed .