JPH0210841Y2 - - Google Patents

Description

[Detailed Description of the Invention] (A) Field of Industrial Application The present invention relates to an improvement of a mounting device for a bleeder of a hydraulic cylinder for a suspension that adjusts the vehicle height.

(b) Prior art As shown in Figure 4, this type of hydraulic cylinder for suspension supplies and discharges hydraulic oil from the tip of a piston rod 1 to hydraulic chambers A and B, and moves the piston 2 up and down to adjust the vehicle height. It is something. Therefore, the cylinder tube 3 has an oil pool 5 with a slight gap around the outer periphery.
A main seal 6 and a sub-seal 7 are provided, which are surrounded by the outer shell 4 so as to form a main seal 6 and a sub-seal 7 which surround the piston rod 1. The main seal 6 is intended to cut high-pressure oil, and the sub-seal 7 is intended to prevent oil leakage to the outside. Therefore, the main seal 6 allows for slight oil leakage and supplies oil to the sub seal 7.
Excess oil is introduced into an oil reservoir 5 and circulated through a bleeder 8 to a required hydraulic circuit.

As shown in FIG. 5, this bleeder 8 has a bent step 8a protruding from one end and a bulge 8b at the other end into which a nylon tube 9 is fitted. It is welded 8c to the shell 4 by brazing or the like.

(c) Problems to be solved by the invention As mentioned above, since the conventional bleeder 8 protrudes at right angles to the side of the outer shell 4, it requires a large space when installing the hydraulic cylinder to the vehicle body. Outer shell 4 for brazing
Accuracy on both the side and the bleeder 8 side is required.

In order to avoid this lateral protrusion, there is a method in which the bleeder 8 itself is bent as shown in FIG. 6, but this has the disadvantage that it requires bending work and increases the effort required for brazing work.

(d) Means for solving the problems In order to solve the above-mentioned problems, in the suspension hydraulic cylinder bleeder mounting device of the present invention, an oil pool 5 is formed between the outer shell 4 and the cylinder tube, A hydraulic cylinder in which the oil reservoir 5 is connected to a hydraulic circuit includes a protrusion that elastically fits into the mounting hole 11 of the outer shell 4, and a protrusion passage 12 formed in the protrusion, which communicates with the protrusion and has a bleeder at the tip. The bleeder case 10 is made of an elastic material, and the band 14 is used to fasten the case 10 to the outer shell 4.

(E) Effect According to the device of the present invention configured as above,
When installing the bleeder 8, after the bleeder 8 is pressure-fitted into the communication hole 13, the protruding passage 12 of the case 10 is press-fitted into the mounting hole 11 of the outer shell 4, and finally the band 14 is tightened. , the bleeder 8 parallel to the cylinder can be easily installed. In this case, it goes without saying that brazing and the like can be omitted.

(F) Example The example shown in Figures 1 and 2 is the outer shell 4.
This figure shows the state in which the bleeder 8 is attached, and the structure and operation are as described above.

FIG. 3 shows another embodiment, in which a bleeder case 10 is attached to the packing case 20 of a single-cylinder cylinder without an oil pool, and the band 14 is tightened as in the previous example. death,
The bleeder 8 is connected to the hydraulic circuit via a nylon tube, and its operation is the same as in the previous example.

(g) Effects of the invention As described above, according to the invention, by using the bleeder case, the bleeder does not protrude to the side, and not only does it require no bending process, but also no welding process. Therefore, installation is easy,
It has excellent features such as not requiring the same precision as welding, and has significant practical benefits.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional side view of a bleeder part showing one embodiment of the mounting device according to the present invention, Fig. 2 is a partially cutaway plan view of the same part, and Fig. 3 is a monocylindrical cylinder showing another embodiment. 4 is a partially cutaway side view showing an example of a conventional hydraulic cylinder, FIG. 5 is an enlarged sectional view of its bleeder portion, and FIG. 6 is an enlarged sectional view of another bleeder portion. . 4-Outer shell, 5-Oil pool, 8-Bleeder, 10-Bleeder case, 11-Mounting hole, 1
2 - Projection passage, 13 - Communication hole, 14 - Band.

Claims (1)

[Scope of Claim for Utility Model Registration] A hydraulic cylinder in which an oil pool is formed between an outer shell and a cylinder tube, and the oil pool is connected to a hydraulic circuit, which elastically fits into a mounting hole in the outer shell. communicating with a protrusion and a protrusion passage formed in the protrusion;
A hydraulic cylinder for suspension, comprising a main body having a communication hole at its tip into which a bleeder is elastically fitted, a bleeder case made of an elastic material, and a band that binds the case to an outer shell. bleeder mounting device.