SU1235815A1 - Hydraulic drive of outrigger of hoisting machine - Google Patents

Description

The invention relates to mechanical engineering, in particular to hydraulic actuators of outboard supports of lifting, road-building, mining machines.

The purpose of the invention is to simplify and increase reliability.

The drawing shows a remote support with hydraulic drive.

The hydraulic actuator of the outboard support of the load-lifting machine contains a drive hydraulic cylinder 1 stir, support 2 and mounted on support 2 a hydraulic cylinder 3 lifting and lowering the support. The hydraulic cylinder 1 has a piston 4 and a rod 5 cavity, and the lifting and lowering hydraulic cylinder 3 has a piston 6 and rod 7 cavities, respectively. The hydraulic actuator of the outrigger also contains a switchgear communicated with the cavities of the hydraulic cylinders and the hydraulic lines of the lifting machine and consists of a two-way hydraulic lock 8, the control cavities 9 and 10 of which are communicated through the input channels 11 and 12 with the main lines 13 and 14 of the hydraulic system . The valve cavity 15 of the two-way hydraulic lock through the output channel 16 and the main line 17 is in communication with the rod cavity 5 of the hydraulic cylinder 1 of the support movement, the piston cavity 4 of which is connected through the main line 18 to the hydraulic system 13 of the lifting machine. The valve cavity 19 of the two-way hydraulic lock through the output channel 20 and the main 21 communicates with the piston cavity 6 of the hydraulic motor 3 lifting and lowering the support, the rod cavity 7 of which is communicated through the main 22 with the main 14 of the hydraulic system of the lifting machine.

A piston-pusher 23 is installed in the case of a two-way hydraulic lock 8 between the inlet channels 11 and 12, and in the valve cavities 15 and 19 are spring-loaded locking elements 24 and 25. The rod 26 is the supporting element of the hydraulic cylinder 3 for raising and lowering the support.

During the operation of the support, it moves from position A to position B (cycle I), lowering (cycle II), lifting (cycle 111) and moving from position 5 to position A (cycle IV).

Hydraulic remote support lifting maschina works as follows.

Pressure from line 13 of the hydraulic system of a lifting machine through the line

Editor N. Gunko Order 2976/18

Compiled by O. Kuzmina Tehred I. VeresKorrektor I. Erdeyi

Circulation 799 Subscription

VNIIPI USSR State Committee

for inventions and discoveries

113035, Moscow, Zh-35, Raushsk nab. 4/5

Branch PPP "Patent, Uzhgorod, st. Project, 4

18 is fed into the piston cavity 4 of the hydraulic cylinder 1 of the support movement and along the line 13 into the inlet channel 11 of the two-way hydraulic lock 8, the piston pusher 23 moving to the right (according to the drawing) and opens the locking element 24 for draining the working fluid from the rod cavity 5 of the hydraulic cylinder 1 along highway 17, through channels 16 and 12 and further along highway 14 into the hydraulic system.

0 Due to the fact that the pressure for opening the locking element with a piston -pusher is much less than the pressure required for opening the locking element when the pressure of the working fluid is directly applied to the gripping element, the locking element 25 remains closed. In this case, the hydraulic cylinder 1 moves the support 2 from position A to position B (cycle 1), after reaching which the pressure of the working fluid in line 13 rises to the pressure required to open the locking element 25. After opening the latter, pressure is fed through channel 20 and line 21 In the porous cavity 6 of the hydraulic cylinder 3 of raising and lowering the support, and from the rod end 7, up to the mains 5, the gutters 22 are drained into the main line 14 of the hydraulic system (cycle II). There is a machine installation on portable support. To remove the machine from the outriggers, pressure from the hydraulic system line 14 is supplied via line 22 to the rod end 7 of the hydraulic cylinder 3, raising and lowering the support and through line 14 to the inlet 12 of the two-way hydraulic lock. The piston-pusher moves to the left (according to the drawing) and opens the locking element 25 for draining from the piston cavity 6 of the hydraulic cylinder 3 for raising and lowering the support along line 21 through channels 20 and. 11 to the highway 13 of the hydraulic system of a lifting machine (cycle GP). The locking element 24 remains closed until the end of the stroke.

0 26 of the hydraulic cylinder 3 lifting and lowering the support, after which the pressure in the line 14 increases to the value at which the locking element 24 opens, and the working fluid enters through the main line 17 into the rod cavity 5 of the hydraulic cylinder pa 1 moving the support and displaces the liquid from the porous neck cavity 4 of this cylinder along line 18 to line 13 of the hydraulic system of the machine (cycle IV), after which support 2 returns from position B to position A.

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Claims (1)

A HYDRAULIC DRIVE SUPPORT FOR A LIFTING MACHINE, containing hydraulic cylinders for raising and lowering and moving the support, a switchgear in communication with hydraulic cylinder cavities and hydraulic lines of the load-lifting machine, characterized in that, in order to simplify and increase reliability, the switchgear is a two-way hydraulic lock the cavity of which is in communication with the hydraulic lines, one of the valve cavities is in communication with the rod cavity of the support hydraulic cylinder, and another - with a piston cavity of the lifting and lowering cylinder of the support, the rod cavity of which is connected to the hydraulic system of the lifting machine, connected through one of the control cavities to the first of the valve cavities of the two-way hydraulic lock, and the piston cavity of the hydraulic cylinder of moving the support is connected to the other hydraulic main, which is through the control cavity is in communication with the second _{with the} valve cavity of the double-sided hydraulic lock. SU, „, 1235815