JPH039537Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of the Invention) The present invention relates to an improvement of a vehicle height adjustable hydraulic shock absorber.

(Prior art) When adjusting the height of a vehicle equipped with this type of height-adjustable hydraulic shock absorber while the vehicle is running, air is supplied into the shock absorber body or air is discharged outside the shock absorber body. Especially when the shock absorber is in the compression stroke, the oil scattered inside the shock absorber may blow out of the shock absorber, reducing the performance of the shock absorber itself or blocking the air hose flow path, causing damage to the intended vehicle. Problems such as not being able to adjust the height may occur.

(Purpose of the invention) The present invention was made to solve the above-mentioned problems.The purpose of this invention is to prevent the oil from blowing out of the main body during operation, thereby preventing the deterioration of its performance, and to achieve the desired result. The purpose of the present invention is to provide a vehicle height adjustable hydraulic shock absorber that can smoothly adjust the vehicle height.

(Structure of the invention) In order to achieve the above object, the invention provides a check valve in which slits are formed on the upper and lower surfaces of the connecting portion of the air hose to the shock absorber body.

(Embodiment) A preferred embodiment of the present invention will be described below with reference to the accompanying drawings.

Fig. 1 is a half-cut sectional view of the height-adjustable hydraulic shock absorber according to the present invention, Fig. 2 is an enlarged broken sectional view of the air hose connection part of the hydraulic shock absorber, and Fig. 3a, b, and c are top views of the check valve. , a cutaway side view, a bottom view, and FIG. 4 are views similar to FIG. 2 showing the operating state of the check valve.

In the vehicle height hydraulic shock absorber 1 shown in FIG. 1, a cylinder 2 has a double cylindrical structure with inner and outer cylinders 3 and 4, and a piston rod 5 is inserted into the inner cylinder 3 as shown in the figure. A piston 6 is connected to the lower end of the piston 6 and is fitted to the inner periphery of the inner cylinder 2 so as to be slidable up and down. Thus, the inside of the cylinder 2 is divided into an upper chamber S ₁ , a lower chamber S ₂ and a reservoir chamber S 3 , and each chamber is divided into an upper chamber S 1 , a lower chamber S 2 and a reservoir chamber S ₃ .
Hydraulic oil is sealed inside S ₁ , S ₂ , and S ₃ .

On the other hand, a top metal 7 is tied to the upper end of the piston rod 5, and the top end of a top case 8 is tied to the outer periphery of the top metal 7.
A seal member 9 that slides into contact with the outer circumference of the outer cylinder 4 is fitted into the lower inner circumference of the upper case 8 . An air chamber _S4 is formed within the upper case 8, and springs 10 and 11 are stretched within the air chamber _S4 . In addition, in the figure, 12 is a stopper bar, and 13 is a dust boot.

By the way, an air hose 14 is connected to the upper part of the upper case 8 via a joint member 15, and a check valve 16 is provided in the joint member 15 so as to be movable up and down. As shown, due to its own weight, it comes into contact with the upper surface of the upper case 8 so as to cover the through hole 8a formed in the upper case 8. The check valve 16 has a cylindrical shape as shown in FIG.
c are formed respectively.

Therefore, if compressed air is sealed into the air chamber _S4 of the hydraulic shock absorber 1 through the air hose 14, the piston rod 5 will move upward and the vehicle height will be adjusted higher, and conversely, air will be removed from the air chamber _S4 . Then, the piston rod 5 moves downward and the vehicle height is adjusted lower.

By the way, during the compression stroke of the hydraulic shock absorber 1, the hydraulic oil is scattered in the air chamber _S4 in the form of a spray, and at this time the check valve 16 is moved upward by the internal pressure of the air chamber _S4 . 4, the passage 1 of the air hose 14 is in close contact with the lower end surface of the air hose 14
Cover 4a. Therefore, as shown in FIG. 4, the sprayed hydraulic oil is vigorously jetted out from the through hole 8a provided in the upper case 8 toward the hole 16a of the check valve 16, collides with the peripheral wall of the hole 16a, and condenses.
Fall.

The air from which oil has been removed flows out through the slit 16b formed on the upper surface of the check valve 16 and the air hose 14. Note that slits 16b formed on the upper and lower surfaces of the check valve 16,
16c also functions to prevent the check valve 16 from coming into close contact.

(Effects of the invention) As described above, the check valve can prevent oil from flowing into the air hose and prevent the air hose from clogging with oil, which prevents the performance of the hydraulic shock absorber from deteriorating and It is possible to smoothly adjust the vehicle height during the period.

[Brief explanation of drawings]

Fig. 1 is a half-cut sectional view of the height-adjustable hydraulic shock absorber according to the present invention, Fig. 2 is an enlarged cutaway cross-sectional view of the air hose connection part of the hydraulic shock absorber, and Fig. 3 a, b, and c are each a check valve. The top view, cutaway side view, and bottom view of FIG. 4 are similar to FIG. 2, showing the operating state of the check valve. In addition, in the drawing, 1 is a vehicle height adjustable hydraulic shock absorber, 2 is a cylinder, 5 is a piston rod, 6 is a piston,
8 is an upper case, 14 is an air hose, 15 is a joint member, 16 is a check valve, 16a is a hole, 16b and 16c are slits, S ₁ , S ₂ and S ₃ are oil chambers, and S ₄ is an air chamber.

Claims (1)

[Scope of utility model registration request] In a vehicle height adjustable hydraulic shock absorber that adjusts the vehicle height by supplying air into the shock absorber body via an air hose or discharging air from within the shock absorber body, the air hose is connected to the shock absorber body. A cylindrical check valve is provided in which slits are formed in the upper and lower surfaces of the connecting part and the outer diameter thereof is smaller than the inner diameter of the connecting part, and one end of the check valve is opened into the through hole formed in the shock absorber body. , a vehicle height adjustable hydraulic shock absorber characterized by having a hole bored at the other end which is closed.