SU493208A1 - The mechanism of felling trees - Google Patents

Description

one

The invention relates to the forest industry and can be used for directional felling of trees with feller-trelevochnyh machines.

The known mechanism of felling trees, mounted on a feller-skidder and contains, sliding and pivoting beams, a mechanism for fixing the pivoting beam, a pivoting lever, a rod and a power cylinder.

The purpose of the invention is to increase the efficiency of the mechanism in operation.

This is achieved by the fact that, in the proposed tree fall mechanism, the mechanism for fixing the rotary beam is made in the form of two plungers installed on the fence of the cabin of the feller-skidder at the beginning and at the end of the working stroke of the rotary beam.

FIG. 1 shows the described mechanism, a general view; in fig. 2 is a section along A-A in FIG. one; in fig. 3 is a section along BB in FIG. one.

The mechanism of the directional felting of trees contains a pivoting beam 1 of box section, fixed at one end on axis 2 and resting with the lower plane on the support bracket 3 of the fence, retracting beam 4, pivoting lever 5 hinged on the pivoting beam and assigned to transfer forces from the power cylinder 6 through rod 7 on retractable beam, shock absorber 8 for fencing

lever, wedges 9, clamp 10, guide 11 and springs 12.

The mechanism of felling trees as follows.

In the initial position, the beam is pulled out into the rotary beam, which is held in the extreme forward position due to the fact that the retainer 10 enters the hole in the rotary beam 1.

When fluid is supplied to the piston cavity of the power cylinder 6, the sliding beam 4 under the action of the power cylinder rod through the rotary lever 5 and the rod 7 moves out of the rotating beam 1 to the position when the wedge

9 will push in the latch 10 and the beam 1, thereby, will be able to turn. With further extension of the rod of the power cylinder 6, the rotary beam 1 together with the extendable beam 4 rotates around the axis 2 at an angle a,

carried out the directed fall of the tree. At the end of the working stroke, the beam 1 is fixed again on the other fixture 10. Now, when turning on the return stroke of the power cylinder, the turn beam cannot turn in the opposite direction, as a result of which the beam 4 rapidly moves into the beam 1. At the end of the close stroke, the wedge 9 presses the lock 10 and enables beam 1 together with beam 4 moved into it

to the starting position.

Thus, the proposed change in kinematics allows one to maintain a predetermined technological sequence of advance-turn, back-turn.

Subject invention

The mechanism of felling trees, mounted on a feller-trelevochnoj machine and containing

retractable and pivot beams, pivot beams locking mechanism, pivot arm, rod and power cylinder, is different because, in order to increase work efficiency, the pivot beams locking mechanism is made in the form of two plungers mounted on the fencing of the feller machine in the beginning and end of the working stroke of the rotary beam.

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