SU1486098A1 - Pruning shears - Google Patents

Description

The invention relates to agriculture 2

economic equipment, in particular to tools for trimming tree branches, vines and other plants. The purpose of the invention is to simplify the design and reduce energy consumption. The pruner consists of a bar 1 with a cutting knife 2 placed in a casing 3, made with a shear part, while the shear part is covered by a fork 5 connected to a sleeve 9 placed on a bar 1. During operation, the fork 5 bends the branch and the knife 2 cuts it off, without encountering resistance. 3 il.

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1486098 A1

1486098

The invention relates to agricultural machinery, in particular to tools for trimming the branches of trees, vines and other plants.

The purpose of the invention is to simplify the design and reduce the energy intensity of cutting.

FIG. 1 shows a pruner, general view; in fig. 2 - the same, side view; in fig. 3 - the process of cutting and bending the branches.

The pruner consists of a rod 1, at the end of which a rotating disk knife 2 is installed, an electric motor (not shown) placed in a sickle-shaped protective casing 3, which simultaneously performs the function of a contradiction. On the casing 3 pivotally mounted is a fork 5 which is spring-loaded by means of a spring 4, the ends of which are made of elastic elements 6. The end part of the fork 5 is connected by a flexible thread (cable) 7 passing through a guide bracket 8 through a bushing 9 coaxially mounted on a bar 1 s. the possibility of its free movement along the axis of the rod.

Pruner works as follows.

The operator, holding the lower end of the bar 1 with one hand and the sleeve '9 with the other, brings the rotary disc 2 (secant arrow A) to the place where branch 10 is cut, so that the branch extends between the crescent-shaped part of the casing 3 and the ends ( are made of elastic elements) 6 forks 5. Next, the branch is captured by the cutting edge of the knife, which tends to push the branch in the direction of narrowing the gap (see arrow B). From this moment begins the cutting process. Simultaneously, the operator moves

the sleeve 9 down (along arrow B), pulling the cable 7 and, thereby, turning the fork 5 relative to the hinge 11.

As a result, the ends of the fork turn down the cut branch (in the direction of arrow G), facilitating cutting and preventing friction between the knife and the cutting surfaces of the branch. After the end of the cutting process, the operator releases the sleeve, which, together with the fork, returns to its original position under the action of the force of the tensioned spring 4.

When a branch is folded over, its free part may be less resistant to bending than the main part, which adjoins the plant. In this case, one of the elastic ends of the fork rests on the main part of the branch and begins to bend due to its elasticity. At the same time, the second end of the fork continues to bend the free end of the branch, which has less resistance to bending. The stiffness of the elastic ends of the fork is set on the basis of the conditions for ensuring the bending of the most rigid branches and vines.

Claims (1)

Claim A pruner containing a rod on which a circular knife is installed in a sickle-shaped protective housing and a counter part, characterized in that, in order to simplify the design and reduce energy consumption, the pruner is equipped with a fork hinged on the sickle body enclosing the counter part, and the sleeve installed on the rod with the ability to move along it and connected with a fork flexible connection, while the fork is spring-loaded to the rod, and its ends are made of elastic. 1486098 f 1 / 2.2