SU596189A2 - Hydraulic drive of guide arm and bundling-forming device of lumbering machine - Google Patents

Description

According to the main author. St. No. 285404 is known for the hydraulic drive of the circumferential lever and the chain hoist of the binding machine of the forest machine.

However, when a large packet of trees is being tied up when the circumferential lever is lowered, the cable is pulled out of the chain hoist, and the piston of the cylinder of the chain hoist moves and forces the working fluid to the drain. The hydraulic cylinder of the chain pulley is locked with a check valve, which prevents the cable from being pulled out and disrupts the working capacity of the tandem forming device.

When the cable is pulled out from the place of attachment or its destruction, in some cases, for example, when the engine is muffled, it is impossible to manually pull the cable out of the chain hoist and retract the piston of the cylinder of the chain hoist as the cylinder of the chain hoist is locked with a check valve.

When a tree is loaded onto a conic, the tree is hit by a rope pulled by a trailing lever. At the same time, in order to reduce the load in the cable and the structures associated with it, it is necessary to draw the cable out of the chain hoist, which is accompanied by the movement of the cylinder of the chain hoist hydraulic cylinder.

When the tree strikes the cable, the cable is pulled out after the force in the cable increases and, accordingly, the pressure in the rod cavity of the hydraulic lever of the circumferential lever increases to the required amount, under the action of which the control plunger moves and the check valve opens. The opened non-return valve connects the hydraulic cylinder along, 1 disengaged with drain, which allows the cable to be pulled out of the chain hoist. All this

0 leads to a delay in the beginning of the stretching of the cable when striking a submerged tree and increasing the effort in the cable and the circumferential lever when loading the tree. The insertion of a control plunger for the check valve in, 1 is unjustified and complicates the hydraulic drive.

5The purpose of the invention is to increase reliability.

and simplify the design of the hydraulic drive.

This is achieved by the fact that the piston cavity of the hydraulic cylinder of the drive of the polyspast is connected to the drain line through a check valve controlled by the main cylinder to the tapan, and the check valve in the supply line is made uncontrollable.

The drawing shows schematically the hydraulic drive of the circumferential lever and the chain hoist of the belt-forming device while lifting

trailing arm.

The hydraulic actuator includes gnd) orgi-limiter 1, oil lines 2--4, control pipeline 5 with throttle 6, hydraulic cylinder of the circumferential lever 7, hydraulic actuator 8, control valve 9, the main valve 10, which is under the action of springs 1 1 through a system 12 is set to the extreme left position. In this position, the main valve 10 closes the oil pipe 3 and opens the non-return valve 13, as a result, the hydro-cylinder is connected by the oil pipe 4 with a live valve.

After the logging maggina is approached the tree, the tree is pressed and felled. When a tree is loaded onto a conic of a logging machine, a tree may have an effect on the bypass cable, the node of which the cable pulls out of the polnaspat and retracts the piston of the hydraulic chain drive of the polyspast. The working fluid from the hydronicle of the polyspast is discharged through the open non-return valve 13 via the oil pipe 4.

After loading the wood working fluid.) From the hydraulic distribution; I through the oil pipe 3 is fed into the piston cavity of the hydraulic lever of the circumferential lever 7. The circumferential lever with a circumferential cable (not shown in the drawing) is lowered, the vane is wrapped. Lezhaphi.k on horseman. A machine with a certain size of trees naket,; when lowering the circumferential lever, the circumferential cable was pulled out of the chain hoist. At -ITOM nopnieHb, the gigabyte cylinder 8 of the pulley 8 retracts and displaces the working fluid through the open check valve 14, the oil pipe 4 is eaten and c.

At the end of the stroke of the GPD cylinder of the circumferential lever, when the knock is tied to the tree, the stem of the hydraulic cylinder of the circumferential) is completed.

7 acts on the lever 9 and, through the control system 12, causes the interchangeable valve-Io valve 10 to the extreme right position. At the same time, the check valve 13 is closed, the oil pipe 3 is opened and through the return clanan 14 is connected to the hydrocylin.throm.

As a result of this, the working fluid from the oil line 3 enters the piston 1O. Of the hydraulic cylinder of the polyspast 8, and the extension of the hygroscopic cylinder of the folio / aster is tightening the loop of the circumferential cable around the nakad of trees.

With riepe.Menieiuiii the main valve to the extreme right position is the working .kidkos1.,

113 CAVITY AND MANAGEMENT AND VESTING -: LETTER BY MASS. On the control of the oil pipe 2, the middle of the hydraulic distributor 1 with a drain. After the trees are tightened by a cable, the lever of the hydroplane reader is placed in neutral position and the forest procurement machine transnortiruet a package of trees. At the same time, leakage from the porous field of the hydraulic cylinder of the oil and gas tank 8 and, accordingly, weakening of the tightening of the loop of the circumferential cable are excluded.

0: Closed non-return valves 13 and 14.

To unload a package of trees or load another tree, hydraulic valve 1 includes working fluid and is supplied through the oiling valve 2 to the rod no: iocTb of the hydraulic cylinder of the circumferential lever 7 and simultaneously along the oil line 5 into the cavity A of the main valve 10. Under the action of pressure of the working fluid in the cavity And the main valve shifts to the extreme left position, as a result of which the check valve 1 opens, the oil pipe

0 3 overlaps. At the same time, the throttle 6 ensures the smooth movement of the main clanan. At the same time, the piston of the hydraulic cylinder of the circumferential lever is stirred and the circumferential lever is raised. In cases when there were no trees in front of these meters or there was

 The sky is a single package of trees, at the end of the lift. The circumferential lever is pulled out of the cable. At the same time, the piston of the polysnest hydraulic cylinder retracts and displaces the working fluid through the open reverse clan 13 and

Q masloprovo.t 4 to discharge.

After lifting the circumferential lever hydro; ) The allocation is set to neutral. The main valve 10 in the leftmost position is held by the spring 11. The described cycle of technological operations

$ logging machine repeat.

Claims (1)

Invention Formula Hydraulic drive of the circumferential lever and zero 1-l-nG: Stake obvocno-forming device HP-sozagotitelnoy machines but auth. St. L 285404, characterized in that, in order to understand the reliability and simplify the design of the hydraulic drive, the piston cavity of the hydraulic cylinder of the polyspast drive shaft is connected to the drain line through a check valve, the main valve canal, and the check valve in the neck of the master's neck, 111 made peruprag le. i s m.