JP2511957Y2 - Mounting structure of liquid supply pipe for hydraulic actuator - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure of a liquid supply pipe for supplying a working liquid to a hydraulic actuator such as a caliper body of a disc brake or a master cylinder for hydraulically operating a brake or a clutch.

[0002]

2. Description of the Related Art A caliper body of a hydraulic disc brake is connected to a liquid supply pipe for introducing the hydraulic pressure generated in a master cylinder. A mouthpiece is connected to the end of the liquid supply pipe on the side of the caliper body, and one side surface of the ring body provided at the tip of the mouthpiece is placed on the opening of the union hole formed in the caliper body to form a ring. A liquid supply pipe is attached to the caliper body by screwing a union bolt, which is inserted from the other side surface of the body, into the union hole.

By the way, when the liquid supply pipe is mounted as described above, the liquid supply pipe may be rotated together by screwing in the union bolt and may be mounted out of the direction to be set. In the disc brake disclosed in Japanese Patent Laid-Open No. 55-127139, a bifurcated boss portion is provided in the union hole of a caliper body in the vicinity thereof, and a cervical tube in the middle portion of the mouthpiece is sandwiched between the boss portion and liquid supply. The tube can be held in a predetermined direction.

[0004]

However, in such a mounting structure, the direction of the liquid supply pipe is limited to one direction according to a certain vehicle body condition. However, it was difficult to share the caliper body because the handling of the liquid supply pipe became defective and the connecting work was difficult.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a mounting structure of a liquid supply pipe which can set a plurality of connecting directions of the liquid supply pipe to a hydraulic actuator such as a caliper body of a disc brake.

[0006]

According to the above-mentioned object, the first
In the configuration of, one side surface of the ring body provided on the mouthpiece connected to the end of the liquid supply pipe is placed on the opening of the union hole formed in the hydraulic actuator such as the disc brake or the master cylinder, In a mounting structure of a liquid supply pipe for a hydraulic actuator, which is mounted by screwing a union bolt inserted from the other side surface of the ring body into a union hole, the hydraulic actuator is provided with a union boss portion having a polyhedral outer periphery. Then, the union hole is formed in the union boss portion, and a washer is interposed between the union boss portion and the ring body of the die, and the washer is attached to one of the flat surfaces of the outer periphery of the union boss portion. And a second anti-rotation piece that engages with the base and holds the orientation of the washer, and a second anti-rotation piece that engages with the mouthpiece to prevent the liquid supply pipe from rotating.

In the second configuration, one side surface of the ring body provided on the mouthpiece connected to the end of the liquid supply pipe is connected to a union provided on a hydraulic actuator such as a caliper body of a disc brake or a master cylinder. In the mounting structure of the liquid supply pipe for the hydraulic actuator, which is mounted on the opening of the hole and is screwed into the union hole, the union bolt inserted from the other side surface of the ring body is attached to the hydraulic actuator. Projecting a multi-sided union boss portion to form the union hole in the union boss portion, and to engage the die with one of the flat surfaces of the outer periphery of the union boss portion to form the liquid supply pipe. It has a tongue protruding from it.

[0008]

In the first construction, the engagement between the first detent piece of the washer and the flat surface of the outer circumference of the union boss portion is engaged, and in the second construction, the engagement between the tongue piece of the mouthpiece and the flat surface of the outer circumference of the union boss portion. The orientation of the liquid supply pipe integrated with the mouthpiece can be set by the number of surfaces of the union boss portion by changing the respective cases. Therefore, since the connecting direction of the liquid supply pipe does not restrict the mounting form of the actuator, the actuator can be commonly used for other mounting conditions.

For example, when the present invention is applied to the disc brake shown in the prior art, the caliper body is placed in the body structure and the entire disc brake while directing the liquid supply pipe in the direction in which there is no trouble in handling and connecting work. According to the shape, it is mounted around the disk rotor in the desired direction.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment in which the present invention is applied to a disc brake will be described below with reference to FIGS.

In the figure, 1 is a disc rotor that rotates integrally with a wheel, and 2 is a caliper bracket fixed to the vehicle body at one side of the disc rotor 1.
The support arms 2a, 2a extending in the direction of the disk axis extending from the disk rotor 1 to the disk rotor 1 are provided with a caliper body 3 which is a hydraulic actuator of the present invention via a pair of slide pins 4, 4. It is supported so that it can move in any direction.

The caliper body 3 has a shape in which a working portion 3a arranged on both sides of the disc rotor 1 and a reaction portion 3b are connected by a bridge portion 3c straddling the outside of the disc rotor 1, and the working portion 3a. A pair of friction pads 5 and 5 are provided between the reaction portion 3b and the reaction portion 3b so as to face each other on both sides of the disc rotor 1.

On both sides of the acting portion 3a, the mounting arms 3d,
3d is provided so as to project, and at the tip of each mounting arm 3d,
The slide pin 4 that slides in an insertion hole 2b formed in the support arm 2a is screwed. A cylinder hole 6 is provided in the acting portion 3a so as to open on the side of the disc rotor 1, and a cup-shaped piston 7 is inserted in the cylinder hole 6 so as to be liquid-tight and movable, and a hydraulic pressure is applied to the bottom portion. Chamber 8 is defined.

At the center of the bottom wall of the action portion 3a, a union boss portion 3f having six flat surfaces 3e on the outer periphery is projected, and on the upper side wall of the action portion 3a is formed a bridder boss portion 3g. There is. The union boss 3f communicates with the union hole 9 for introducing hydraulic pressure, and the bridder boss 3g has an air ejecting bridder hole (not shown) communicating with the hydraulic chamber 8. It is provided. A liquid supply pipe 10 to be described later is connected to the union boss portion 3f, while a brider screw 11 is usually screwed to the brider boss portion 3g to close the brider hole.

The union boss portion 3f is a caliper body 3
Or a separate member such as a hexagon nut,
It is later attached to the caliper body 3 by welding or the like, and a flexible liquid supply pipe 10 connected to a known hydraulic master cylinder (not shown) is connected to the boss portion 3f via a base 12. The base 12 includes a connecting pipe 12a that is caulked and fixed to the tip of the liquid supply pipe 10, and two washers 1 on both sides.
It is composed of a ring body 12b sandwiched between 3, 14 and fixed to the union boss portion 3f by a union bolt 15 and a small diameter neck tube 12c connecting these in the middle, and a through hole 12d at the center of the ring body 12b. The annular groove 12e for liquid communication
Is recessed.

The one washer 13 interposed between the union boss portion 3f and the ring body 12b is a circular flat washer, and two first detent pieces 13a which are bent to one side from opposite positions. , 13a and two second detent pieces 1 protruding from the intersection of the pieces 13a, 13a and bent to the other side.
3b and 13c are used, and a normal flat washer is used as the other washer 14 provided outside the ring body 12b.

In the union bolt 15, a screw 15c is engraved on the outer circumference of the shaft portion 15b protruding from the hexagonal head portion 15a, and a T-shaped member penetrating in the radial direction and the axial direction inside the shaft portion 15b. A liquid passage hole 15d is formed.

The present embodiment is constructed in this way, and the one washer 13 is provided with the second rotation stopping pieces 13b and 13c.
While being directed toward the mounting direction of the liquid supply pipe 10, the first detent pieces 13a, 13a are engaged so as to sandwich the two opposed flat surfaces 3e of the union boss portion 3f. Next, attach the neck tube 12c of the base 12 to the second detent pieces 13b and 13c.
While sandwiching the ring body 12b, one side surface of the ring body 12b is placed on the washer 13, and the washer 14 is overlaid on the other side surface of the ring body 12b.
, The tip of the bolt 15 is screwed into the union hole 9, and the base 12 and the washers 13, 14 are fixed, whereby the liquid supply pipe 10 is attached in the desired direction.

The hydraulic pressure generated in a hydraulic master cylinder (not shown) goes from the liquid supply pipe 10 through the annular groove 12e of the base 12 into the central through hole 12d, and then the union bolt 1
It is supplied to the hydraulic chamber 8 through the liquid passage hole 15d of No. 5. By supplying this hydraulic pressure, the piston 7 presses the one friction pad 5 against one side surface of the disc rotor 1, then the caliper body 3 moves to the action portion 3a side, and the reaction portion 3b moves to the other friction pad. 5 is pressed against the other side surface of the disc rotor 1, and the disc rotor 1 is pinched by the friction pads 5 to perform a braking action.

When the liquid supply pipe 10 is attached to the acting portion 3a as described above, it tries to rotate together by screwing the union bolt 15, but one second rotation stopper piece 13b provided on the washer 13 is provided. , Neck tube 1 of base 12
Since 2c is supported to prevent this, the liquid supply pipe 10 is securely held in the set predetermined direction. Further by any chance,
Even if an excessive external force may be applied to the liquid supply pipe 10 after mounting, the other second rotation stopping piece 13c of the washer 13
However, since the opposite side of the neck tube 12c is supported to prevent rotation, the setting direction of the liquid supply tube 10 does not fluctuate.

Further, in the present embodiment, the engagement between the first detent pieces 13a, 13a of the washer 13 and the flat surface 3e of the union boss portion 3f is changed so that the liquid supply pipe 10 can be oriented in all six directions. It is possible to set
Even when the caliper body 3 is attached to a desired location around the disc rotor in accordance with the vehicle body structure and the overall shape of the disc brake, the supply pipe 10 can be oriented in a direction that does not cause any trouble in handling or connecting work. Therefore, the caliper body 3 can be widely used for other vehicle types having different vehicle body structures.

The first anti-rotation piece 13 in this embodiment.
Even with one a, there is a sufficient detent effect. Further, in positioning the liquid supply pipe 10, at least the second anti-rotation piece 13b is provided so that the direction does not change when the union bolt 15 is screwed in, which makes it difficult to set the direction and makes the work difficult.
Should be provided.

FIGS. 4 and 5 show a second embodiment of the present invention. In this embodiment, a tongue piece 12f that directly abuts the neck tube 12c of the mouthpiece 12 with the flat surface 3e of the union boss portion 3f.
And that both washers 14, 14 provided by sandwiching the ring body 12b are ordinary flat washers,
This is different from the first embodiment described above.

The tongue piece 12f is formed by welding a flat plate having substantially the same shape as the flat surface 3e of the union boss portion 3f so as to project from the neck tube 12c in a direction orthogonal to the axis thereof. While the ring 12b is in contact with any one of the flat surfaces 3e of the union boss portion 3f, the ring body 12b is attached to the washer 1
It is sandwiched by 4, 14 and overlapped on the upper surface of the union boss portion 3f, and the male screw 15c of the union bolt 15 inserted through these is screwed into the union hole 9 to fix the mouthpiece 12 and both washers 14, 14. By doing so, the liquid supply pipe 10
Are positioned and fixed in the desired direction.

In this embodiment, a tongue piece 12f is projected on the mouthpiece 12 having an existing shape, and the union boss portion 3f having a polygonal shape is used.
Since it only needs to be combined with the above, it can be manufactured at a lower cost as compared with the first embodiment described above, and further, the union boss portion 3 can be manufactured.
The liquid supply pipe 10 can be positioned even if the washer between the liquid supply pipe 10 and the connector is not provided.

Further, in this embodiment, in order to align the tongue piece 12f with the flat surface 3e of the union boss portion 3f, the cervical canal 12 is formed.
However, depending on the position of the plane 3e, the connecting pipe 1
It may be provided on the 2a or the ring body 12b. Further, as a modified example of the present embodiment, the tongue piece may be formed in a V shape, and the tongue piece may be engaged with two surfaces of the outer circumference of the union boss portion.

Although the above-mentioned embodiments have been described with reference to the caliper body of a vehicle disc brake, the present invention relates to a master cylinder for hydraulically operating a brake or a clutch, and other fluid supply pipes for hydraulic actuators. It can be widely used as a mounting structure.

[0028]

As described above, in the mounting structure of the liquid supply pipe for the hydraulic actuator of the present invention, the hydraulic actuator is provided with the union boss portion having a polyhedral outer periphery, and the union hole is formed in the union boss portion. Is formed, and a washer is interposed between the union boss and the ring body of the base,
The washer has a first detent piece that engages with one of the outer surfaces of the union boss and holds the orientation of the washer, and a second detent piece that engages the mouthpiece and prevents the liquid supply pipe from rotating. Or to provide a mouthpiece with a tongue piece that engages with any of the flat surfaces of the outer circumference of the union boss,
Since the liquid supply pipe is positioned, the orientation of the liquid supply pipe can be changed in many directions by changing the engagement between the first rotation stopping piece of the washer or the tongue piece of the die and the flat surface of the outer periphery of the union boss. It becomes possible to set. Therefore, it is not necessary to limit the mounting form of the actuator by arranging the liquid supply pipe, so that the application of the actuator can be expanded.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a liquid supply pipe connecting portion according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing a state in which a liquid supply pipe is connected to a caliper body.

FIG. 3 is a partial sectional perspective view of a disc brake.

FIG. 4 is an exploded perspective view of a liquid supply pipe connecting portion according to a second embodiment of the present invention.

FIG. 5 is a sectional view showing a state in which a liquid supply pipe is connected to a caliper body.

[Explanation of symbols]

1 disc rotor 3 caliper body 3a acting as a hydraulic actuator of the present invention 3a working part of caliper body 3 union boss part 3e projecting from working part 3a flat surface provided on the outer periphery of union boss part 3f 8 hydraulic pressure Chamber 9 union hole 10 flexible liquid supply pipe 12 base 12a connecting pipe 12 of base 12b ring body 12c of base 12c neck tube 12f of base 12 tongue piece 13 protruding from neck tube 13 one of ring body 12b The washer 13a provided on the side surface side according to the present invention 1st detent piece 13b, 13c 2nd detent piece 14 washer provided on the other side surface of ring body 12b 15 union bolt

Claims (2)

(57) [Scope of utility model registration request] 1. A side surface of a ring provided on a mouthpiece connected to an end of a liquid supply pipe is connected to an opening of a union hole formed in a hydraulic actuator such as a caliper body of a disc brake or a master cylinder. In a mounting structure of a liquid supply pipe for a hydraulic actuator, which is mounted and screwed into a union hole by inserting a union bolt inserted from the other side surface of the ring body, in the hydraulic actuator, the union having a polyhedral outer periphery. A boss portion is provided so as to project the union hole in the union boss portion, and a washer is interposed between the union boss portion and the ring body of the mouthpiece. A first anti-rotation piece that engages with any one of the flat surfaces to hold the orientation of the washer, and a second anti-rotation piece that engages the mouthpiece and prevents the liquid supply pipe from rotating. A structure for mounting a liquid supply pipe for a hydraulic actuator characterized by the above. 2. A side surface of a ring body provided on a mouthpiece connected to an end portion of a liquid supply pipe is connected to an opening of a union hole formed in a hydraulic actuator such as a caliper body of a disc brake or a master cylinder. In a mounting structure of a liquid supply pipe for a hydraulic actuator, which is mounted and screwed into a union hole by inserting a union bolt inserted from the other side surface of the ring body, in the hydraulic actuator, the union having a polyhedral outer periphery. Protruding a boss portion to form the union hole in the union boss portion, and to the mouthpiece,
Engage with any flat surface of the outer periphery of the union boss,
A mounting structure for a liquid supply pipe for a hydraulic actuator, characterized in that a tongue piece for preventing rotation of the liquid supply pipe is provided in a protruding manner.