JP2562810Y2 - Pressure oil introduction part of 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 an improvement of a pressurized oil introducing portion for feeding pressurized oil to a cylinder portion provided in a caliper of a disc brake for braking an automobile during braking. As well as not to damage the sealing surface,
An object of the present invention is to provide a structure in which a pressure oil supply / discharge pipe through which pressure oil flows through a cylinder portion can be attached to a seal surface so as to be adjustable in angle within a plane parallel to the seal surface.

[0002]

2. Description of the Related Art A disc brake used for braking an automobile is provided with a pair of pads sandwiching a rotor that rotates together with wheels, and a pair of pads are pressed by hydraulic pressure during braking to apply the pair of pads to both side surfaces of the rotor. Is pressed.

FIG. 10 shows an example of a pressure oil introducing section for sending a hydraulic pressure generated by depressing a brake pedal into a caliper having a built-in piston.

A caliper 1 having a cylinder portion 21 therein
An oil passage 2 is provided on a side wall of the oil passage 2 for communicating the cylinder portion 21 with the outside of the caliper 1, and a female screw 3 is formed on an inner peripheral surface of the oil passage 2. A seat 4 is formed on the outer surface of the caliper 1 around the oil passage 2, and the surface of the seat 4 is mirror-finished. An annular union 6 is provided at one end of a pressure oil supply / discharge pipe 5 communicating with a pressure oil supply means such as a master cylinder. On the inner peripheral surface of this union 6,
As shown in FIG. 11, one end of a passage 7 communicating with the pressure oil supply / discharge pipe 5 is opened.

[0005] The union 6 is fixed to the seat 4 by a union bolt 8 screwed with the female screw 3 on the inner peripheral surface of the oil passage hole 2. A rod portion of a union bolt 8 composed of a rod portion 9 having a diameter smaller than the inner diameter of the union 6 and a head portion 10 provided at an outer end of the rod portion 9 and having a diameter larger than the inner diameter of the union 6. An oil passage 11 having an opening at both ends on the side surface and the end surface of the intermediate portion of the rod portion 9 is provided inside the rod portion 9. Further, between the seat 4 and the union 6, and between the head 10 of the union bolt 8 and the union 6, metal packings 12, 12 made of copper or the like are sandwiched, respectively. To prevent pressure oil leakage.

At the time of braking, the pressure oil sent from the pressure oil supply / discharge pipe 5 to the inside of the union 6 through the oil passage 7 further flows through the oil passage 11 and the oil passage 2 into the cylinder portion 21 of the caliper 1. To push out the piston fitted in the cylinder portion 21 to perform braking.

Incidentally, in the case of the structure shown in FIGS. 10 and 11, the union bolt 8 is engaged with the notch 20 formed in the wall 19 at the end of the seat 4 and the pressure oil supply / discharge pipe 5 to connect the union bolt 8 to the female. Screw 3
The union 6 is prevented from rotating when screwing and tightening. Further, Japanese Utility Model Application Laid-Open No. 60-2026 discloses that square walls are provided with upright walls on opposite sides thereof to prevent damage to the seats, and a square base for the pressure oil supply / discharge pipe is attached to the seats. There is described a structure that does not sometimes rotate.

[0008]

However, the conventional oil pressure introducing portion of the disc brake constructed and operated as described above has the following problems to be solved.

That is, in order to prevent leakage of pressurized oil from the portion between the seat 4 and the union 6, the surfaces of the seat 4 and the union 6 with which both surfaces of the packing 12 abut must be mirror surfaces. is there. If the surfaces of the seat 4 and the union 6 are damaged, the pressure oil present inside the union 6 leaks to the outside through the damage, and the pressure oil for braking gradually decreases.

On the other hand, since the seat 4 formed on the outer surface of the caliper 1 is exposed to the outside before the union 6 is mounted, the seat 4 is liable to be scratched by foreign matters hitting during transportation and the like. The caliper 1 having a damaged portion 4 must be discarded as a defective product, or the surface of the seat 4 must be polished again.

For this reason, conventionally, if the caliper 1 is not carefully conveyed, the yield of the caliper 1 is reduced, and the manufacturing cost of the disc brake is increased. Also, when the same disc brake is mounted on different types of vehicles, the mounting angle of the pressure oil supply / discharge pipe is often different. However, in the structure described in Japanese Utility Model Laid-Open No. 60-2026, the mounting angle of the pressure oil supply / discharge pipe is different. Cannot be adjusted. In such a case, the calipers had to be rebuilt according to the vehicle type. As a result, it was necessary to prepare a plurality of types of calipers. The pressure oil introduction part of the disc brake according to the present invention solves the above-mentioned disadvantages.

[0012]

The pressure oil introduction part of the disc brake of the present invention is formed on the side wall of a caliper having a cylinder part inside, similarly to the pressure oil introduction part of the conventional disk brake described above. An oil passage for communicating the cylinder portion with the outside of the caliper, a female screw formed on the inner peripheral surface of the oil passage, and a circular seat formed on the outer surface of the caliper around the oil passage. Part, a cylindrical union provided at one end of a pressure oil supply / discharge pipe communicating with the pressure oil supply means, and a union bolt which is screwed with the female screw to fix the union to the seat. You.

Further, in the pressure oil introducing portion of the disc brake of the present invention, a projection is formed at a portion around the seat which does not interfere with the union, and is formed so as to annularly surround substantially the entire periphery of the seat. It is characterized by doing.

[0014]

The pressure oil introduction section of the disk brake of the present invention configured as described above has the same effect as described above when the pressure oil is fed into the cylinder section in the caliper during braking. It is the same as the section.

Further, in the case of the pressure oil introducing portion of the disc brake of the present invention, the projection formed around the seat makes it difficult for foreign matter to hit the surface of the seat, and the surface of the seat is hardly damaged. Become. Further, the mounting angle of the pressure oil supply / discharge pipe is adjusted to an optimum state by leading the pressure oil supply / discharge pipe through a notch provided between the plurality of protrusions or at an appropriate position of the short cylindrical continuous protrusion. be able to.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a first embodiment of the present invention shown in FIGS. The pressure oil introduction portion of the disc brake of the present invention is the same as the above-described pressure oil introduction portion of the conventional disc brake except that a protrusion is formed around the seat portion. The protrusion formed around the portion will be mainly described.

Around the flat seat 4 formed on the outer surface of the caliper 1, a plurality of portions that do not interfere with the union 6 (see FIGS. 10 and 11) fixed to the seat 4 by the union bolt 8 are provided. The protrusions 13 are formed intermittently so as to surround substantially the entire circumference of the seat 4.

As described above, when the seat 4 having the projections 13 and 13 on the periphery is formed on the outer surface of the caliper 1, first,
A material 14 as shown in FIGS. 2 and 3 is manufactured by die-casting of aluminum, and then, as shown in FIG. 1, the inner peripheral surface of the material 14 is ground to form a cylinder 21 and a mirror-finished surface. Is formed by machining and the oil passing hole 2 having the female screw 3 formed on the inner peripheral surface, and the machining is completed.

As described above, the protrusions 13, 1,
In the case of the pressure oil introducing portion of the disc brake of the present invention, the seat portion 4 is formed due to the presence of the projections 13.
Foreign matter hardly hits the surface of the seat 4, and the surface of the seat 4 is hardly damaged.

Next, a second embodiment of the present invention shown in FIGS. In the first embodiment described above, a plurality of protrusions 13 are provided intermittently around the seat 4, whereas in the case of the present embodiment, a short cylindrical wall is formed around the seat 4. Are formed. In part of this projection 15,
A notch 16 for passing the pressure oil supply / discharge pipe 5 is provided.

As described above, when the seat 4 having the short cylindrical wall-shaped projection 15 is formed on the outer surface of the caliper 1,
First, by die-casting aluminum, FIG.
Material 17 as shown in FIG. 7 or Material 1 as shown in FIGS.
8 and then, as shown in FIGS.
While grinding the inner peripheral surface of the cylinder 18 to form the cylinder portion 21,
A seat 4 having a mirror-finished surface and a female screw 3 on the inner peripheral surface
Are formed by machining, and the notch 16 for allowing the passage of the oil passage hole 2 and the pressure oil supply / discharge pipe 5 is completed. The notch 16 can be formed at any position on the protrusion 16 according to the union mounting angle. Other structures and operations are the same as those in the first embodiment.

[0022]

Advantages of the Invention The pressure oil introducing portion of the disc brake of the present invention is constructed and operates as described above, and thus has the following effects.

(1) Since a plurality of independent projections are intermittently arranged in a ring or a single short cylinder-shaped notch is provided around the seat, the seat is not damaged. Strong protective effect.

(2) Therefore, it is possible to prevent the occurrence of defective products due to damage to the seat portion, thereby improving the yield of the caliper, and to suppress an increase in cost for the treatment for protecting the seat portion.

(3) Since the mounting angle of the pressure oil supply / discharge pipe can be adjusted, the caliper may be rebuilt in order to change the mounting angle of the pressure oil supply / discharge pipe when used in a different vehicle type. It is not necessary to prepare the oil supply and to have a hard time how to attach the pressure oil supply / discharge pipe.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of the present invention.

FIG. 2 is a perspective view of a caliper material in the first embodiment.

FIG. 3 is a sectional view of a material of a caliper in the first embodiment.

FIG. 4 is a sectional view showing a second embodiment of the present invention.

FIG. 5 is a perspective view showing a second embodiment of the present invention.

FIG. 6 is a sectional view showing a first example of a caliper material according to the second embodiment.

FIG. 7 is a perspective view showing a first example of a caliper material in the second embodiment.

FIG. 8 is a cross-sectional view showing a second example of a caliper material in the second embodiment.

FIG. 9 is a perspective view showing a second example of a caliper material in the second embodiment.

FIG. 10 is a perspective view showing the disc brake having the pressure oil introduction section to which the present invention is applied, in a state where the pressure oil introduction section is disassembled.

FIG. 11 is a cross-sectional view of a conventional pressure oil introduction unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Caliper 2 Oil passage 3 Female screw 4 Seat 5 Pressure oil supply / discharge pipe 6 Union 7 Passage 8 Union bolt 9 Rod 10 Head 11 Oil passage 12 Packing 13 Projection 14 Material 15 Projection 16 Notch 17 Material 18 Material 19 Wall 20 Notch 21 Cylinder

Claims (3)

(57) [Scope of request for utility model registration] An oil hole formed in a side wall of a caliper having a cylinder portion therein and communicating the cylinder portion and the outside of the caliper; a female screw formed on an inner peripheral surface of the oil hole; A circular seat formed on the outer surface of the caliper around the oil passage hole, a cylindrical union provided at one end of a pressure oil supply / discharge pipe communicating with the pressure oil supply means, the female screw and the screw; And a union bolt for fixing the union to the seat portion, and a projection is formed around the seat portion at a portion that does not interfere with the union, in a state that substantially the entire circumference of the seat portion is annularly surrounded. The pressure oil introduction part of the disc brake characterized by the fact. 2. A plurality of protrusions are formed intermittently around the seat with an interval allowing a pressure oil supply / discharge pipe connection of the union to be led out, and substantially annularly surround the entire periphery of the seat. 2. The pressure oil introduction part for a disc brake according to claim 1, wherein 3. A single projection is formed in a short cylindrical shape around a seat portion, and substantially annularly surrounds substantially the entire periphery except a portion through which a pressure oil supply / discharge pipe passes. 2. A pressure oil introducing portion of the disc brake according to 1.