JPH0227681Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a hydraulic clutch type cylinder device for a vehicle clutch.

[Conventional technology]

A conventional example of this type is Utility Model Publication No. 55-5793, shown in FIG. This cylinder device 1
The cylinder body 2 and piston 3 are made of an alloy such as aluminum. Then, the main parts of the hydraulic chamber 2b of the cylinder body 2, the somewhat large-diameter rear chamber 2c communicating with the hydraulic chamber 2b, and the piston 3 movably housed in the chamber 2c were processed by cutting or the like. . Furthermore, in the cylinder device 1 described above, when the end of the push rod 6 protruding from the other end is fixed in contact with the release fork 12, a separate attachment member (not shown) is used.

[Problem that the invention attempts to solve]

Due to the above configuration, the conventional cylinder device has the following problems.

(1) Since the cylinder body 2 is molded from an alloy, it is heavy, and each main part has to be cut, resulting in high costs.

(2) As a solution to these problems, it was considered to make the cylinder body made of synthetic resin, but synthetic resin deteriorated the sealing performance at the piping connection part of the cylinder body, making it difficult to realize this.

[Means for solving problems]

The present invention includes a cylinder body made of synthetic resin, a piston housed in the cylinder body and moved by hydraulic pressure, and a push rod protruding from the piston through a sealing member that seals the other end of the cylinder body. In a cylinder device, a cap whose inner wall is threaded and fits into an opening on the piping connection end side of a cylinder body, a cylindrical body that covers the outer periphery of the cylinder body, and a cylinder body that protrudes outward in the axial direction from one end of the cylindrical body. a stopper piece that comes into contact with the circumferential surface of the pipe cap and restricts rotation of the pipe cap, and a cap member that projects radially from the base of the cylindrical body and includes a flange in which a mounting hole is formed; The cylinder body is attached to the member to be attached by the attachment member with the attachment hole of the flange of the cap member and the attachment hole of the flange provided on the outer periphery of the cylinder body aligned.

[Effect]

When fixing the above cylinder device to the member to be mounted, since the main cylinder body is made of synthetic resin, it can be mounted with good workability due to its light weight. Since the piping connection part provided at the front of the body both has a flange with a mounting hole, both can be easily and reliably fixed directly to the member to be attached, without the need for other mounting members. can. In addition, when connecting piping to the front end of the cylinder body, a metal piping connection part is already provided at this position, so the bolt fitting can be inserted into the female thread, and the hydraulic pressure can be supplied by being held by this bolt fitting. With a stopper piece for piping that performs rotation,
The piping can be connected firmly and stably.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings. Note that the same reference numerals are used for parts that are the same as or correspond to those in the prior art.

As shown in FIG. 1, the cylinder body 2, which is the main body of the cylinder device 1 in this embodiment, is constructed as follows. That is, this cylinder body 2 is molded from synthetic resin, and has an opening 2a in which a mouthpiece 7b of a mouthpiece member 7, which will be described later, is accommodated at the front end, which is the piping connection end side. A hydraulic chamber 2b and a chamber 2c for housing the piston 3 are concentrically connected to the rear of the opening 2a. Further, an annular groove 2d is formed on the outer circumferential surface of the front end side, into which a claw 7e of a cap member 7, which will be described later, is engaged.
Furthermore, a flange 2e having a symmetrical convex surface is provided protruding in the radial direction on the intermediate outer circumference near the annular groove 2d, similar to the one shown in FIG. Holes 2f are provided through each of them.

At the front end position of the cylinder body 2, a cap member 7, which will become a piping connection section shown below, is fitted. As shown in FIGS. 1 to 4, this cap member 7 has a small diameter cap 7b on the inside and a large diameter cylindrical body 7a on the outside, both of which are made of a single metal plate bent at the front side. It is formed concentrically with . A female thread 7c is provided on the inner diameter surface of the cap 7b, into which a bolt fitting 15 (to be described later) is screwed. Further, by cutting and raising this surface at one end of the circumferential surface of the cylinder body 7a, a U-shaped stopper piece 7d for preventing rotation of the mouthpiece 13a of the piping 13, which will be described later, is provided axially outward from the front end of the mouthpiece member 7. It is shaped to protrude in the direction. Similarly, a claw 7e for temporarily fixing the cap member 7 to the front part of the cylinder body 2 is provided at an opposing position on the circumferential surface of the cylinder body 7a, and a claw 7e for temporarily fixing the cap member 7 to the front part of the cylinder body 2 is cut down diagonally with respect to the surface portion at each position. It is shaped so that it can be fitted into the annular groove 2d. Further, a flange 7f having a convex surface symmetrical to the flange 2e of the cylinder body 2 is provided protruding in the radial direction at the base of the cylinder body 7a, and mounting holes 7g are respectively provided through the convex surface of the flange 7f. ing. Cap member 7 according to the above
In this case, the cap 7b is fitted into the opening 2a of the cylinder body 2, with the mounting hole 7g of the flange 7f matching the mounting hole 2f of the same flange 2e of the cylinder body 2, and each claw 7e is fixed at each position. It is fitted concentrically to the cylinder body 2 by fittingly fitting into the annular groove 2d.

In the chamber 2c of the cylinder body 2 according to the above embodiment, the piston 3 is movably housed by the support of the spring 4 under the sealing performance of the piston cup 8. A push rod 6 of a predetermined length is placed at the rear of the piston 3 via a boot 5 that seals the rear end of the cylinder body 2, and its one end abuts against the recess 3a of the piston 3. The cylinder devices 1 are arranged concentrically so as to be exposed to each other, and are constituted as a whole into a cylinder device 1. Note that 9 indicates the opening 2a of the cylinder body 2 and the cap member 7.
It is a seal attached to the outer periphery of the base 7b of 10
is a mounting bolt as a mounting member for fixing the cylinder body 2 and the cap member 7 to the vehicle body 11 with screw insertion from both mounting holes 2f and 7g, and 12 is a rear shaft of the push rod 6. It is a release fork whose end abuts.

Next, the effect will be explained. In the cylinder device of this embodiment with the above configuration, when it is fixed to the vehicle body 11 which is the member to be attached, the cylinder body 2
Since the cap member 7 and the cap member 7 are temporarily fixed by fitting the claw 7e into the annular groove 2d, each mounting hole 2
By screwing the mounting bolts 10 from f and 7g into screw holes (not shown) in the vehicle body 11, the cylinder device 1 can be easily and reliably fixed directly to both without requiring any other mounting members or the like. Furthermore, when piping is connected to the front end of the cylinder body 2, the cap member 7 is fitted at this position, so as shown in FIG. A cap 13a having a circumferential groove 13b on its surface
Hydraulic feed hose 1 through joint 13c
3d, the inner diameter part of the cap 13a is concentric with the female thread 7c of the cap member 7,
Further, the narrow diameter portion of the cap 13a is arranged so as to be fitted into the stopper piece 7d of the cap member 7 in a non-rotating state, that is, so that the circumferential surface of the cap 13a abuts on the inside of the U-shape of the stopper piece 7d. Then, small holes 15b and 15c are formed in the shape of a cross from the outside to the inside.
In addition, an air bleed screw 16 with a rubber cap 17 is inserted into the female thread 15a at a position outside the small hole 15b of the shaft center.
The bolt fitting 15 screwed through the cap 1
When screwed into the female thread 7c of the cap member 7 in a manner that penetrates the inner diameter of the bolt 3a and tightened, the piping 13 is held in a strong and stable state by the holding of the bolt fitting 15 and the rotation prevention action by the stopper piece 7d. can be connected to. Therefore, when hydraulic oil is supplied into the cylinder body 2 from the piping 13, the packing 14 is fitted in advance between the front end of the cap member 7 and the cap 13a, and between the cap 13a and the bolt fitting 15. , the above cap 13
Since the bolt fitting 15 is screwed into the female thread 7c of the cap member 7 and is in perfect contact with the female thread 7c of the cap member 7, extremely good sealing performance can be maintained.

In the above embodiment, the cylinder device was used in a hydraulic clutch system, but the present invention is not limited to the above embodiment, and can also be applied to, for example, a master cylinder that generates oil for brake operation. .

[Effect of idea]

As explained above, the present invention includes a cylinder body made of synthetic resin, a piston housed in the cylinder body and moved by hydraulic pressure, and a piston that protrudes from the piston via a sealing member that seals the other end of the cylinder body. A cylinder device comprising a push rod whose inner wall is threaded and which fits into an opening on the piping connection end side of the cylinder body, a cylinder body that covers the outer periphery of the cylinder body, and a cylinder body that extends axially outward from one end of the cylinder body. a stopper piece that protrudes in the direction and comes into contact with the circumferential surface of the piping cap of the cylinder body to restrict rotation of the piping cap;
A cap member configured of a flange protruding in the radial direction from the base of the cylinder body and having a mounting hole formed therein is provided, the mounting hole of the flange of the cap member and the mounting hole of the flange provided on the outer periphery of the cylinder body. Since the above-mentioned cylinder body is attached to the attached member using the mounting member in a state where the above-mentioned cylinders are aligned, when the above-mentioned cylinder device is fixed to the attached member, the main cylinder body is made of synthetic resin, so it is lightweight. In addition, the cylinder body and the piping connection section provided at the front of the cylinder body both have flanges with mounting holes, making it possible to install them with good workability. It can be easily and securely fixed directly to the mounting member, and the front end of the cylinder body is provided with a metal pipe connection part, and the bolt fitting can be inserted into the female thread of the pipe connection part, and the stopper piece can be prevented from rotating. Since the hydraulic pressure supply piping can be firmly and stably connected to this position, it is possible to enhance the functionality of this type of cylinder device and improve its quality, and the degree of processing is drastically reduced by resin molding, reducing costs. It has the effect of significantly reducing the

[Brief explanation of drawings]

FIG. 1 is a longitudinal side view showing an embodiment of the cylinder device according to the present invention, FIG. 2 is a front view of the same, and FIG. Figure 4 is a perspective view of the base member;
FIG. 5 is a longitudinal sectional side view showing an example of a cylinder device according to the prior art. 1...Cylinder device, 2...Cylinder body, 2
f, 7g...Mounting hole, 2e, 7f...Flange,
3... Piston, 5... Boot, 6... Push rod, 7... Base member, 7a... Cylindrical body, 7b...
...Band, 7c...Female screw, 7d...Stopper piece,
7e...nails.

Claims (1)

[Scope of utility model registration request] In a cylinder device equipped with a synthetic resin cylinder body with piping connected to one end, and a piston housed in the cylinder body and moved in one direction by hydraulic pressure via the piping, the inner wall is threaded so that the cylinder body A ferrule that fits into the opening on the piping connection end side, a cylindrical body that covers the outer periphery of the cylinder body, and a cylindrical body that protrudes axially outward from one end of the cylindrical body and comes into contact with the circumferential surface of the piping ferrule of the cylinder body, and the piping A stopper piece for regulating the rotation of the cap and a flange projecting radially from the base of the cylindrical body and having a mounting hole are provided. A cylinder device characterized in that the cylinder body can be attached to a member to be attached by an attachment member in a state where the attachment hole of a flange provided on the outer periphery of the body is aligned with the attachment hole of the cylinder body.