SU1333893A1 - Drive of pulsed action - Google Patents

Abstract

The invention relates to mechanical engineering and m. used in timber cutting machines. The purpose of the invention is to increase reliability. For this, the damping cylinder (C) 8 is designed as a separate C, its piston 9 is installed with the possibility of shutting off the direct connection of hydraulic cavities (P) 10 and 5 C 8 and power C 1. In cutting mode P 10 and 5 are communicated through distributor 15 , and piston 9, moving, reports them directly. This provides a rapid flow of fluid from the P 5 to the P10, an increase in pressure in the pneumatic P 11 damper C 8 and a decrease in pressure in the pneumatic P 4 power C 1. 1. Il. 00 00 oo cx; about 00

Description

The invention relates to mechanical engineering, in particular to devices for cutting timber, and can be used, for example, in timber industry.

The purpose of the invention is reliability.

The drawing shows a pulse drive circuit.

The actuator includes a ram 1, in which a piston 2 with a rod 3 is placed. The piston 2 separates the cylinder

1na piston pneumatic cavity 4, rod hydraulic cavity 5. The stem 3 is connected by working bodies, which are made in the form of knife holders 6 with a knife 7. The damping cylinder 8 has a separating piston 9 with the formation of hydraulic and pneumatic cavities 10 and 11. Hydraulic cavities 5 and 10 of hydraulic cylinders 1

and 8 are interconnected directly by hydroline 12, with the piston

2 and the separating piston 9 have the ability to periodically terminate the direct connection between the hydraulic parts 5 and 10 which are also interconnected via lines 13 and 14 and the i15 distributor, made two-way, and with the pressure source 16 and the drain 17, through the distributor 18, filled with three positions .

The drive works as follows. .

In the initial position, the piston 2 of the cylinder 1 and the piston 9 of the cylinder 8 are in the extreme left position (according to the drawing), blocked by the hydroline 12,

The distributor 18 is brought to a position in which the liquid from the source 16 of pressure is supplied to the cavity 5 of the cylinder 1 through line 13, and the distributor 15 is in this case

a position in which the cavity 10 is not connected. A pulsed-action actuator containing power and damping cylinders with pistons, pneumatic and hydraulic cavities from which the hydraulic cavities of the cylinders are connected directly and through a two-position distributor and with a source pressure and discharge through the second valve, the power cylinder rod is connected with the working body, and the piston is installed with the possibility of blocking the direct connection of the hydraulic cavities of the cylinders, differing

with the line 13. The piston 2 is moved to the extreme right (according to the drawing) position, the gas in the cavity 4 is compressed, so that in order to increase the reliability of the distributor 18 is transferred to the ty, the damper cylinder is made in the neutral position.

To ensure the cut, turn on the distributor 15 in a position that allows the lines 13 and 14 to communicate with each other. In this case, the working fluid from the cavity 5 of the cylinder 1 enters through the line 13,14 and the distributor 15 into the cavity 10 of the cylinder 8 and the piston 9

five

Q

five

0

This cylinder 8 begins to move to the right (according to the drawing) under the action of pressure in cavity 5. As the piston 9 of cylinder 8 moves, it opens hydroline 12 to connect cavities 5 and 10 of cylinders 1 and 8. Since hydraulic resistance of hydraulic line 12 is less than hydraulic resistance of line 13, 14 and the distributor 18, then there is a rapid flow of fluid from the cavity 5 into the cavity 10. This increases the pressure in the pneumatic cavity 11 of the cylinder .8 and the pressure in the cavity 4 of the cylinder 1 decreases.

The cutting mode occurs (the stored energy of the pneumatic cavity 4 of the cylinder 1 is converted into the kinetic energy of the knife 7).

At the end of the stroke to the left (according to the drawing), the piston 2 overlaps the communication line 12, the distributor 15 is moved to the position that terminates the connection between the lines 13 and 14, and the distributor 18 is set to the position in which the line 14 is connected through the distributor 18 to a drain 17. At the same time, the piston 9 of the cylinder 8 moves to the extreme left position (according to the drawing). This completes the duty cycle and the drive is ready for a new duty cycle.

Claims (1)

Invention Formula Impulse Actuator Drive, containing power and damping cylinders with pistons, pneumatic and hydraulic cavities, from which the hydraulic cavities of the cylinders are interconnected directly and through a two-position distributor and with a pressure source and drain through the second distributor, the power rod cylinder is connected with the working body, and the piston is installed with the possibility of blocking the direct connection of the hydraulic cavities of qi the fact that, in order to increase reliability, the damping cylinder is made in cylinders, characterized by the fact that, in order to increase reliability, the damping cylinder is made in 55 de separate cylinder, its piston. it is also installed with the possibility of overlapping the direct connection of the hydraulic cavities of the cylinders, as which the rod cavity is used in the power cylinder, and the second valve is three-position.