SU563454A2 - Excavator actuator for cutting slots - Google Patents

Description

one

The invention relates to the field of earthmoving machinery, namely, devices for cutting gaps mainly in frozen soils with the aim of their subsequent excavation or laying in a narrow trench cable.

A working tool for cutting gaps mainly in frozen soils is known, which consists of disk cutters, each of which is made so that the axis of circumference of the incisors of the incisors is displaced relative to the axis of rotation of the cutter and the cavities of the incisors, and the directions of these displacements of all installed cutters have an equal angular displacement relative to to each other.

However, the cutters of such a working body, working alternately at higher feeds, all the time have the same angular velocity of rotation.

The purpose of the invention is to reduce the energy intensity of cutting by imparting to each cutter an accelerated rotation when operating it on higher feed rates.

For this purpose, the drive of the working body is made in the form of pairs of elliptical wheels, which are installed relative to each other with phase shifts equal to the street displacements of the centers of circles of the projections of the teeth of the respective cutters.

The drawing shows the proposed working body.

The disk milling cutters 1 are mounted with an offset of the circumferences of the protrusions of the teeth with respect to the centers of the circles of the depressions coinciding with the centers of rotation of the mills. The directions of displacements of all disk mills are equidistant from each other, i.e. for the two mills shown in the drawing, the shift between the displacements is half the rotation of the working body - angle. / 2. Circular milling cutters 1

mounted to the tractor by means of a basement frame 2, on which mechanisms 3 of uneven rotation are mounted, for which pairs of elliptical wheels are selected. Leading elliptical wheels 4 mounted on

the shaft receiving the rotary gear from the power take-off shaft of the tractor or an additional gearbox mounted on the tractor frame (due to a cardan or other mechanical transmission). Driven elliptical wheels 5

fastened directly to disc cutters 1.

The work of the proposed device consists in alternately accelerated - slow rotation of each of the cutters. Accelerated phase

rotation coincides with the removal of thicker chips. When using pairs of elliptical wheels, the directions of the eccentricities of the driven wheels 5 are opposite to the directions of displacements of the corresponding disk cutters

1. The shaft on which the drive wheels 4 are mounted receives a uniform rotation. The driven wheels 5 are always in anti-phase uneven rotation. Seen along the base machine, the left driven wheel 5, together with the left cutter 1, is received at the moment fixed in FIG. 1, accelerated rotation, and the right pair - slow. Through a half-turn of the working body, the position is reversed.

Technical and economic efficiency of the proposed device is achieved by reducing the cutting power consumption of the soil.

Claims (1)

Invention Formula The working body of the earthmoving machine for cutting gaps according to ed. St. No. 434157, characterized in that, in order to reduce the cutting power intensity, its drive is made in the form of pairs of elliptical wheels, which are set relative to each other with phase shifts equal to the angular displacement of the centers of circles of the projections of the teeth of the respective cutters.