JPS628675Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a sub-tank of a hydraulic shock absorber, and its object is to provide a sub-tank that facilitates flow control when pressure oil from the shock absorber flows into the sub-tank.

To explain this with reference to the illustrated embodiment, reference numeral 1 indicates a hydraulic shock absorber main body consisting of a cylinder, and the main body 1 has a spring receiver 2 provided on its outer periphery and a spring receiver 5 provided on a piston rod 4 extending from a piston 3 inside the main body 1 to the outside of the main body 1. A coil spring 6 is interposed between the oil chamber 7 and a discharge port 8 that opens outside the main body 1. A sub-tank 10 is connected to the discharge port 8 via a hose 9. The sub-tank 10 is provided with a gas chamber 11 for sealing gas and an oil chamber 12 surrounding the gas chamber 11, and the oil chamber 12 has a first oil passage 13 and a second oil passage 14 communicating with the hose 9. provided, the first oil passage 13 is formed with a step,
The oil passage 13 includes a piston part 15a that slides in the large passage 13a, and a piston part 15a that is seated on a step to close the small passage 13b, and an oil chamber 13c between the piston part 15a and the large passage 13a.
A first valve body 15 includes a valve part 15b forming a valve part 15b, and a check valve 15c that is inserted into the valve part 15b and opens and closes the small path 13b to communicate with the oil chamber 13c.
The second oil passage 14 is also formed with a difference in level through a spring 16, and the first oil passage 14 has a gap between it and the large path 14a. A cylindrical pipe 17 is inserted to form a narrow oil passage 14b connected to the oil chamber 13c of the passage 14, and a cylindrical pipe 17 is slidably inserted to form a temperature-sensitive temperature 18 in which a temperature-sensitive fluid is sealed in the cylindrical pipe 17. A second valve body 19 is fitted therein, and includes a piston portion 19a that protrudes from the piston portion 19a and a needle-shaped valve portion 19b that is fitted into the piston portion 19a to narrow the small path 14c. The sensitive chamber 18 is formed in the cylindrical tube 17 so that it can be adjusted freely, and a sliding rod recessed at the tip of the sensitive chamber 18 is slidably provided by an adjusting screw rod 18a. In the figure, 20 indicates a hose joint that connects the shock absorber main body 1 and the hose 9, and the joint 20 is rotatably attached to the discharge port 8 via a mounting screw 21 that is screwed into the discharge port 8. Connector 2 to be installed
It is formed from 2.

Next, to explain its operation, as the piston 3 moves forward, the oil in the oil chamber 7 of the shock absorber body 1 is forced into the oil chamber 12 of the sub-tank 10 through the hose 9, compressing the gas chamber 11. The sliding movement of the piston 3 is buffered, and at that time, oil flows from the oil chamber 13c of the first oil passage 13 through the oil passage 14b and small path 14c of the second oil passage 14, and the flow path is constricted. The sliding movement of the piston 3 is further buffered, and when the viscosity of the oil decreases due to a rise in oil temperature, the expansion of the fluid in the sensitive chamber 18 causes the valve portion 19b to deeply enter the small path 14c. Since the throttle is adjusted by adjusting the throttle, the buffer does not decrease, and when the oil temperature rises, the pressure in the oil chamber 13c of the first oil path 13 increases so that the valve portion 19b closes the small path 14c. This causes the first valve body 15 to move against the spring 16
The small path 13b of the oil passage 13 is opened to allow the oil to flow into the tank 10, and when the piston 3 moves back, the check valve 15c in the first valve body 15 is closed at low speed on the pull side. is opened by the weak spring pressure to perform delicate adjustment of the buffer on the pull side.

In this way, according to the present invention, the sub tank 10
The oil chamber 12 has a first oil passage 13 communicating with the hose 9.
and the second oil passage 14 are arranged in parallel, and the first oil passage 13
The first valve body 1 closes the oil passage 13 via a spring 16 and opens against the spring 16 due to the high pressure of the oil passage 13.
5 is provided, and the second oil passage 14 is provided with a second valve body 19 that throttles the oil passage 14 by the expansion of the fluid in the sensitive chamber 18. Therefore, the push-side passage flowing into the sub-tank 10 is It has the effect of being able to freely adjust according to temperature changes and exhibiting an excellent buffering effect.

[Brief explanation of drawings]

The drawing is a partially cutaway sectional view showing an embodiment of the present invention. 1...Buffer body, 7...Oil chamber, 9...Hose, 10...Sub tank, 12...Oil chamber, 13...
...First oil path, 14...Second oil path, 15...First valve body, 16...Spring, 18...Sensitive chamber, 19...Second valve body.

Claims (1)

[Scope of utility model registration request] In a sub-tank of a hydraulic shock absorber in which an oil chamber 7 in the shock absorber main body 1 and an oil chamber 12 in a sub-tank 10 filled with gas are connected via a hose 9, the hose 9 is connected to the oil chamber 12 of the sub-tank 10.
A first oil passage 13 and a second oil passage 14 are provided in parallel, and the first oil passage 13 is closed via a spring 16, and the high pressure of the oil passage 13 causes the spring 1 to close.
6, and a second valve body 19 is provided in the second oil passage 14, which throttles the oil passage 14 by expansion of the fluid in the sensitive chamber 18. A sub-tank in a hydraulic shock absorber.