SU1253513A1 - Arrangement for pulling stumps - Google Patents

Description

The invention relates to devices for stump clearing and can be used in the forest industry.

The purpose of the invention is to demonstrate the reliability of capture mon.

FIG. 1 shows the device D.T1Y stubbing stumps, general view; in fig. 2 shows section A-A in FIG. one; figure 3 - diagram of the forces acting on the structural elements; in fig. 4 is a view .B in FIG. one.

A stump rooting device is attached to the handle 1 of a transport vehicle. It contains frame 2 with a double-jaw grip. At the ends of the frame 2 jacks 3 are installed with support plates 4,

To the center of the frame 2 two jaws 5 of the grip and two hydraulic cylinders 6 drive the jaws are fixed. Each jaw 5 and each hydraulic cylinder 6 are connected to frame 2 by means of a horizontal 7 and vertical 8 hinges, which ensure rotation of the jaws 5 and hydraulic cylinders 6 of vertical and horizontal planes. The axes of the vertical hinges 8 of the jaw and the hydraulic cylinder located on one side are spaced in such a way that the distance between the frame 2 and the axis of the vertical hinge of the hydraulic cylinder 6 is less than the distance between the frame and the axis of the vertical hinge of the jaw. The magnitude of the spacing is Р, is 0.2 P, from the condition of the ratio of the normal (N) and tangential (T) components of the hydraulic force force, where P is the horizontal projection of the segment between the axis of the horizontal hinge;

and the jaw and the axis of the spherical ball

FIG. 2

g

five

0 5 p

five

0

13a

nira 9, a combination of a hydraulic cylinder and a thigh.

The lower KOHip i 10 jaws are rounded to allow them to slide off. the lateral roots are mon, and the upper ones have cheeks II, interacting with pyramidal clamps 12 mounted on frame 2. Clamp 12 secures jaws 5 in the transport position and limits the angle of rotation in the working position.

The device works as follows.

The grip with the open jaws 5 leads to a stump. When closing the grip by the hydraulic cylinders 6, the cheeks 1I of the jaws 5 come out of contact with the retainer 12 and receive an additional degree of freedom. When the jaws 5 are closed, they are constantly self-centering under the action of the torque moment P until the moment when the jaw touches the ground. Further, when embedded in the ground, when the lower root enters the lateral root, part 10 of the jaw 5 jumps off of it and, bypassing the root, continues diving until the stumps are fully captured. Then jacks 3 are turned on and the stump is removed from the ground. At the end of the extraction (or loading), the jaws 5 are opened, the cheeks 11, the contact with the inclined surface of the latch 12 and with further closing is centered and the stopper is fixed. After moving to the next stump, the cycle repeats.

Thus, the proposed device provides reliable capture of mon and allows, by eliminating re-capturing, an increase in productivity by 3-4%.

ten

1g.

Claims (1)

STUMP RIVER DEVICE, including jacks with base plates mounted at the ends Phi. " 1 hydraulic hinges are attached to the hydraulic cylinders, interconnected with the jaws of the gripper with lower and upper ends fixed to the frame by means of horizontal hinges, characterized in that, in order to increase reliability, the gripping frame is connected to hydraulic cylinders and jaws by means of vertical hinges and equipped with pyramidal clamps, this axis of the vertical hinges of the hydraulic cylinders are located at a distance from the frame less than the axis of the vertical hinges of the jaws, the lower ends of which are rounded, and the upper ones in transport position are located in piramidal- S and „„ 1253513