CS232358B1 - Swinging device esp.for sprinkler - Google Patents

Description

(54)

Apparatus for swinging a working member, for example a sprayer

The device for swiveling the working member and returning it to its original position is an invention which relates to your fields where it is necessary to swing the working member and return it to its original position. The condition is to connect such an organ to the hydraulic circuit. The problem solved was that the previous systems did not solve the automatic return to the original position. The principle is that the hydraulic cylinder securing the two-arm lever is connected to the hydraulic pump via a two-way distributor with a control valve and a locked operating position, the outlet of the distributor being led through the control valve to the tank. A hydraulic motor is connected downstream of the pump, the outlet of which is led to the tank.

232 358 (»0 (Bl)) (51) Int Cl? A Ol G 25/09

232 358

The subject of the invention is a device for oscillating operating elements, e.g., the spray booms of a wide-engaging sprayer upon being caught by an obstacle and returning these booms back to their original position after the obstacle has been missed.

Currently produced sprayers are in most cases not equipped with any device to protect the arms against impact. Due to the ever-increasing working width, there are frequent accidents of these arms when bypassing obstacles on land (electricity pylons, trees on the edges of land etc.) _o

In recent types of machines, there are sporadically occurring shock-absorbing devices operating on the principle of a spring latch. The disadvantage of this solution is that after hitting an obstacle, the operator must stop the machine, get out and manually return the locked arm back to the working position, resulting in reduced machine performance and markedly reduced quality of work between the obstacle and machine stop. Although hydraulic ram pistons are commonly used in wide-frame boom sprayers, this impact control system is by no means used.

The above-mentioned drawbacks are eliminated by the device according to the invention, characterized in that the hydraulic cylinder securing the two-arm lever is connected to the hydraulic pump under constant pressure through a two-way distributor with locked working position. into the hydraulic drive of the main working bodies, the excess oil leaks into the tank via the hydraulic motor _o

232 358

The device according to the invention achieves the use of a hydraulic system for both folding and unfolding the arms of the working frame and simultaneous use for protection against impact on an obstacle, when the secured arm is deflected and returns after the obstacle is missed. . The device according to the invention makes it possible to further increase the working speed in the obstacle window, allowing better application around the obstacles.

The proposed device can also be used on other machines that require protection against impact. The advantage of the proposed device is that the pressure in the hydraulic system and thus the resistance over the entire stroke does not increase when the piston is moved compared to commonly used hydraulic protection systems with pressure accumulator (eg soil tillage machines).

It is very advantageous to use this device on machines which work with hydraulic drive of working elements and require protection against an obstacle.

BRIEF DESCRIPTION OF THE DRAWINGS The object of the invention is schematically shown in the drawing, in which Fig. 1 represents a two-arm lever in a rest position;

shows the position of the arm in a deflected position after impacting an obstacle, and FIG. 3 shows a schematic connection to a hydraulic system.

The resistance of the obstacle P acts over the arm K and the lever r on the foldable double-arm lever 12, which is fixed to the fixed inner part of the arm 10. At the inner part of the arm 10 is also fixed a hydraulic cylinder 6, which is under permanent pressure oil from the hydraulic pump cylinder holds the second piston force P _P lever arm 12, the eight entire outer part of the arm 11 in the operational position against the stop 13. In the case that the resulting torque caused by the resistance of the obstacle P exceeds the force of the piston P, without increasing the pressure in the hydraulic system, oil escapes from the hydraulic cylinder 6, via the hydraulic motor 2 or the control valve 2 ^{and the} piston releases the arm to position. which is further connected to a pressure source immediately returns the arm back to its initial position.

Within the tank 1, a pump 2, hydromoir ^ 'is the portion between the pump and the hydraulic motor 2 is connected via terminal £ 2-way directional valve ³ the control valve 2 the hydraulic cylinder 6 for the protection and control arms. Switchboard control position 2 is ^e

- 3 232 3S8 equipped with a lock in the shaft. In this case, it is possible to squeeze the lines of the vmm 2 into the hydraulic cylinder 6 which holds the secured part of the arm 11 in the working position.

in case the working machine is not equipped with hydraulic drive, the proposed system can be used so that the excess oil supplied by the pump 2 flows back through the control valve 2.

druhrn vývodem

Claims (2)

SUBJECT OF THE INVENTION 232 358 A device for pivoting a working member, for example a split-foldable collapsible boom sprayer equipped with a hydraulic cylinder, characterized in that the hydraulic cylinder (6) is connected to the hydraulic pump (2) via a two-way distributor (5) which is connected by one outlet (4) between the pump (2) and the hydraulic motor (3) and the other outlet (8) equipped with a control valve (9) is connected to the tank (1). Λ Apparatus according to claim 1, characterized in that a hydraulic motor (3) is connected downstream of the pump (2), the outlet of which is led to the tank (1).