SU387642A1 - LIBRARY - Google Patents

Description

one

The invention relates to agricultural machinery, in particular, to preservation equipment for tillage machines, mainly single-root, such as plantation, bush-marsh plows, deep-rippers, etc.

One-body tillage implements with a safety device are known, including a working body, which is simultaneously both a probe and a copying of its supporting wheel, connected respectively via a stand and a fork with a frame, and a power spring.

The proposed single-hinged plowing machine differs from the known ones in that the stand of the working body is connected via a two-link lever for control with a hydraulic booster, in which the power hydraulic pair is mounted between the frame and the fork of the machine's support wheel.

This allows you to automatically forcibly recess the tool when hitting a car against an insurmountable obstacle, thereby preventing it from breaking.

To protect the two-link lever from breakage at the initial moment of the body digging, its links are articulated and the ends are connected by a spring, the rigidity of which is greater than the stiffness of the spring.

lottery hydraulic booster. In addition, the support of the support wheel is telescopically connected to the frame hinge.

FIG. 1 is a schematic diagram of the proposed machine; in fig. 2 - the same, when driving the working body of the machine to the obstacle.

The tool body / is attached to the frame 2 pivotally and held in the working position.

a pre-compressed spring 3. One end of the spring guide 4 is pivotally connected to the end of the working tool stand 5, and the other freely moves inside the sleeve 6, which is pivotally connected to the frame.

The spring is pre-compressed by moving the nut 7.

The deformation of the spring 3 by means of levers 8, 9 and 10 is transmitted to the spool rod n. The actuation force is changed by either moving the nut 7 or moving the nut 12, changing the relative position of the levers 5 and 9.

A fork 13 is pivotally attached to the plow frame, at the end of which a support is mounted

wheel 14. A stepless adjustment mechanism is provided for varying the plowing depth, consisting of a stand 15 and an adjusting screw 16, which move freely within the harness 17, hinged to the plow frame. To frame on

some distance from the support wheel is pivotally connected to the rod 18 of the power cylinder 19, the lower cavity of which is disconnected from the tractor hydraulic system and communicates with the atmosphere, and the upper one is connected to the hydraulic system through the valve //.

During normal plowing, the spool spring 20 moves to the far right position. In this position of the slide valve, the oil pumped by the tractor's hydraulic pump flows through the cavity A of the slide valve to the power line. This achieves unloading of the tractor hydraulic pump at the position of the safety device corresponding to the state of normal plowing (without any obstacles).

The overflow valve 21 and the check valve 22 serve respectively for maintaining the constant pressure in the hydraulic system (50 KZJCM-, which corresponds to the working pressure of the spool //) and for passing oil in one direction.

When "moving" the working body of the machine to the obstacle, the stand of the working body, overcoming the force of the spring 3, turns slightly. This movement is transmitted through a system of levers 8, 9, and 10 to the spool rod. The lever 8, having overcome the force of the spring 20, moves the spool to the extreme left position. Further rotation of the lever is limited by the stroke of the spool. With a larger rotation of the rack of the working body, the lever 9, overcoming the force of the spring 23, changes its position relative to the lever 8. The stiffness and preload of the spring 23 is taken several times larger than the rigidity and preload of the spring 20. This achieves uniformity tripping force.

In the leftmost position of the spool, the injection line is connected through cavity B of the spool with the upper cavity of the power cylinder.

The piston of the power pidrocylinder moves to EEz, through the fork, it transmits the force to the support wheel and raises the frame with the working body.

After the machine has walked around the obstacle, the working body under the force of the spring 3 takes up the working position. The spool moves to the extreme right position under the action of the force of the spring 20. Under the action of the own weight of the machine, the working body is deepened, and the oil squeezed out of the upper cavity of the power hydraulic cylinder goes through the cavity A of the spool.

Prev invented and

1. Hinged single-planed arable machine, including a working body, which is both a probe and a supporting one.

a wheel connected respectively through a stand and a fork with a frame and a power spring, which is characterized by the fact that, in order to prevent it from breaking down by automatically forcing the working body when the nai machine hits, the workable body is connected through a two-link lever with hydraulic booster whose power hydropair is pivotally mounted between the frame and the support fork

wheels.

2. Machine no. 1, characterized in that, in order to protect the two-link arm from damage at the initial moment of digging

the casing, its links are articulated between themselves, and the ends are connected by a spring, the rigidity of which is greater than the rigidity of the hydraulic booster spring.

3. Machine by. 1 and 2, characterized in that the support of the support wheel is telescopically connected to the frame hinge. Figure 1 / AUU- /.