SU842237A1 - Multistep power cylinder - Google Patents

Description

I

The invention relates to mechanical engineering, namely to power cylinders, and can be used, for example, in force actuators of vehicles.

A multistage power cylinder is known, comprising a housing with a bottom and seals, telescopic pistons of steps with rods and a telescopic tube II.

The disadvantage of the known ram is the impossibility of its simultaneous operation from two independent drives, duplicating; each other, which is necessary in the case of high requirements for reliability and reliability of the working operation.

The purpose of the invention is to provide. reliability and reliability of the working operation due to the simultaneous operation of the cylinder from two drives, duplicating each other.

The goal is achieved by the fact that the cylinder is provided with a glass with a bottom, which adjoins its inner surface with seals on the bottom of the housing and rigidly fastened with the inner edge of the bottom with the stem of the first stage of the telescopic piston, and forms together with the bottom of the housing and stem of the first step an additional working cavity.

The drawing shows a multi-stage power cylinder, general view, section.

The power cylinder includes a housing 1 with a bottom 2 and a seal 3 in which the telescopic pistons 4,5 and 6 are placed, respectively, of the first, second and third stages with rods, respectively, and 9.

In addition, the power cylinder contains a cup 10 with a bottom 11, conjugated by its inner surface 12 with a seal 3 of the bottom 2 of the housing 1 and rigidly fastened with the inner edge

the bottom 11 with the rod 7 of the telescopic piston 4 of the first stage, and forming together with the bottom 2 of the housing 1 and the rod 7 of the first stage an additional working cavity 13.

The telescopic piston 4 of the first stage together with the housing 1 forms a fluid cavity 14, which through a telescopic tube consisting of two shirts 15 and 16 is connected to the underwater channel 17. The housing 1 of the bottom 2, which is conjugated with the rod 7 of the telescopic piston 4 of the first stage, forms displacement cavity 18 which through the hole

19 is connected to the piston cavity

20 second and third steps. In the rod 7, the first one: the blunt holes in the holes 21 for connecting the displacement cavity I8 to the piston cavity 20 in the direction of movement of the telescopic piston 5 of the second stage. No. 1 for supplying the liquid to the rod cavity

22 third steps c. stock 9 is made channel 23.

The cavity between the two groups of seals of the housing 1 communicates with the atmosphere through a drainage channel 24. For supplying gas to the additional working cavity 13, the cup 10 is provided with an opening 25.

The power cylinder operates as follows.

When the working fluid is supplied through the channel 17 and the telescopic tube consisting of two shirts 16 and 15 into the fluid cavity 14, the piston 4 of the First stage telescopically moves. In this case, the working fluid from the test cavity 18 through holes 19 and 21 is displaced into the piston cavity 20 of the second and third stages. As a result, simultaneously with the movement of the telescopic piston 4 of the first stage, the telescopic piston 5 of the second stage, and then the piston 6 of the third stage, first moves. When the piston 5 of the second stage moves, the openings 21 connecting the displacement cavity 18 e by the piston cavity alternately open. A gradual increase in the cross-sectional area between the two cavities ensures a smooth acceleration of the load connected to the actuator. In the process of moving the telescopic piston 6 of the third (last)

steps, the working fluid from the rod end 22 is displaced through channel 23

In the case when the cylinder is actuated by the gas supply, the latter is supplied to the additional working cavity 13 through the opening 25 in the beaker 10. Under the action of the pressure of the gas, movement is effected. 10 and fastened to it through the rod 7 of the telescopic piston 4 of the first stage. At the same time, the working fluid is expelled from the displacement cavity 18 through the openings 19 and 21 into the piston cavity 20 of the second and third stages. Otherwise, the operation of the cylinder is no different from the proposed case of actuating the cylinder by the supply of working fluid.

To fill the liquid cavity 14, the channel 17 is connected to the hydraulic system tank, from where the working liquid cocTb is sucked into the specified cavity. If there is a leak of gas through the first group of seals of the housing 1, then this gas is vented to the atmosphere through the drainage channel 24. Thus, the contact of two different working media (liquid and gas) is prevented.

When two independent hydraulic and gas drives are simultaneously operated, the working fluid is injected through cat 17 and telescopic tube 15 and 16 into the liquid cavity 14, and gas through the opening 25 in the cup 10 is fed into the additional working cavity 13. This causes the first stage of the cylinder to move, and consequently, all its other steps are in the order we offer.

Claims (1)

The telescopic piston reversal in the third stage of the cylinder is forced by the pressure of the working fluid flowing through the channel 23 into the rod cavity 22. At the same time, the working fluid from the piston cavity 20 is displaced through the holes 19 and 21 into the displacement cavity 18, moving the telescopic piston 4 first steps, and the working fluid from the liquid cavity 14 displaces em-c through the telescopic tube 15, 16 and the channel 17 into the hydraulic system tank. The return stroke of the telescopic piston 5 of the second stage is performed under the action of an external load. The movement of the working fluid in this case is the same as during the reverse course of the third stage. Introduction to the cylinder of a glass with a bottom, coupled with its inner surface with seals of the bottom of the housing and rigidly fastened with the inner edge of the bottom with the stem of the telescopic piston of the first stage and forming together with the bottom of the housing and the stem of the first stage an additional working cavity allows the cylinder to work from two independent drives hydraulic and gas, which, in turn, ensures the safety of the working operation and allows the proposed multi-stage steppe cylinder to be used in Sob responsible drives. Claims of the Invention Multistage power cylinder comprising a housing with a bottom and a seal 7 telescopic pistons with stuni, foams with rods and a telescopic multiplier tube, in order to ensure the reliability and reliability of the working operation due to the simultaneous operation of cylinders from two drives duplicating each other flpyfa , the cylinder is provided with a glass with a bottom adjoining its inner surface with: seals of the bottom of the housing and rigidly fixed with the inner 4 edge of the bottom with a telescopic piston of the first station penalties and forming together with the bottom of the housing and the rod of the first stage additional working cavity. . Sources of information received in the examination at the examination., I. Marutov V. A. Hydraulic cylinders. M., Mashchinostroenie, 1966, p.98, fig. 84 .. zo 73 1 Iff n 25