SU1643200A1 - Vehicle suspension hydraulic/pneumatic member - Google Patents

Abstract

The invention relates to the transport engineering, in particular the DU: p-11 - -1 to t 4vb-j-7irr to hydropneumatic elements with a counter pressure of the hydropneumatic suspensions of vehicles. The purpose of the invention is to increase the efficiency of the vehicle suspension by improving the elastic characteristics of the hydraulic pneumatic element. The goal is achieved by the fact that the device is equipped with an additional piston 15 placed in the rod cavity with the possibility of free sliding on the rod, and inside the cylinder 1 there is an annular stop 16, limiting the movement of the additional piston during compression. 1 il. CL o 4b SO yu

Description

This invention relates to a transport engineering, in particular to hydropneumatic elements with a counter-pressure to the hydropneumatic suspensions of vehicles. The purpose of the invention is to increase the efficiency of the vehicle suspension by improving the elastic characteristic of the hydropneumatic element.

Pa drawing shows a hydropneumatic element, a longitudinal section.

The hydropneumatic element comprises a cylinder housing 1, the upper lid 2 of which is pivotally connected to the sprung mass of the vehicle, the main piston 3, the stem 4 of which is pivotally connected to the unsprung mass, the gas chamber 5 divided by a flexible diaphragm 6 into two cavities, one of which is A gas under pressure, and the other B is communicated via channel 7, equipped with a damping (damping) device 8, with a piston cavity B filled with liquid, and a backpressure chamber 9, made inside the piston and a rod a, the upper part of which is filled with gas under pressure, and the lower part with liquid. The lower part of the backpressure chamber connecting tube 10 is connected with the rod cavity E, which is closed from below by a spacer 11 with seals. A flexible seal 14 is mounted between the bottom cover 12 of the hydraulic cylinder body and the plug 13 of the stem to prevent dust from getting into the working surfaces and into the internal cavities of the hydropneelement that An additional piston 15 is placed in the rod cavity, freely sliding along the rod, and inside the cylinder body there is an annular stop 16, which limits the movement of the additional piston during compression.

The hydraulic cylinder body 1 has an opening 17 with a plug 18, through which the fluid is drained, which seeped into the cavity L formed between the main 3 and the additional 15 pistons.

Hydropneumatic works as follows.

During compression, the main piston 3 displaces fluid from the cavity B of the hydraulic cylinder through the damping device 8 into the cavity B of the gas cylinder.

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measures 5. The diaphragm 6 of the gas chamber bends towards the cavity A, the volume of which is reduced, and the gas in it is compressed, as a result of which its pressure rises.

The total volume of the rod end E and the tube 9 of the counter pressure chamber 9 connected to it during compression increases. The gas in the cavity G expands and its pressure decreases.

In the initial part of the compression stroke, the additional piston 15 is under the pressure of a fluid in the rod

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cavity, pressed his sleeve to the end of the main piston 3, and both pistons are moved as one piece. In this case, the resultant force acting on the pistons 3 and 15, and consequently, on the rod 4, is equal to the difference between the force created by the pressure of fluid in cavity B, and the force created by the pressure of fluid in cavity E.

At the end of the compression stroke, the additional piston 15 abuts against the ring 16. Only the main piston 3 moves with the rod 4.

The resulting force acting on the piston 3 and the rod 4 is equal to the force created by the pressure of the fluid in cavity B. During withdrawal, the gas expands in cavity A and the gas compresses in cavity G.

In the initial part of the stroke, only the main piston 3 moves away, and the additional piston 15, pressed against the fluid pressure in the cavity E against the stop 16, remains stationary. The force 4 is transferred to the rod 4 by the pressure of the fluid in cavity B. At the final part of the stroke, the pistons 3 and 15 move as one unit, and the resultant force is transmitted to the rod 4 by the pressure of the fluid in the cavities B and E.

Deactivating the backpressure cavity of the hydropneumatic element at the final part of the compression stroke improves the elastic characteristic of the hydropneumatic element and thereby improves the efficiency of the hydropneumatic suspension of the vehicle.

Claims (1)

Invention Formula Hydropneumatic suspension of the vehicle, containing hinge516432006 But due to the sprung mass of the elastic characteristic of a hydrocap, in which the piston pneumatic element is placed, it is equipped with an additional rod connected to a non-pressure piston placed in the curtain with a different mass and made of a clear cavity with the possibility of displacing the counterpressure chamber 5 the rod, and an annular stop, the lower part of which is rigidly mounted on the inner tube and communicated with the rod cavity, between the pistons and the housing surface with the fact that The contact is an additional goal of increasing the efficiency of the suspended piston with an annular stop and with the vehicle ki by improving the first piston.