SU117051A1 - Automatic garden and grape pruner - Google Patents

Description

Known pruners with pneumatic, electromagnetic and mechanical actuators, consisting of a handle, a fixed shear knife, a movable cutting knife, a rod and a returnable screw spring.

The disadvantage of these secateurs is that they are extremely complex, heavy and inconvenient to use.

A distinctive feature of the proposed pruner is the use of a flexible mechanical drive from the connecting rod-crank mechanism mounted on the tractor, as a result of which the design is simplified and the operational reliability of the pruner is increased.

FIG. 1 shows a secateur in longitudinal section; in fig. 2-drive pruner, side view.

The pruner consists of a handle in which a stopper 2 is screwed with a shear blade 5. A movable knife 4 is pivotally attached to a protrusion on a shear blade 5. A rod 5 is located inside the knob 1 and a cable is embedded in the rod 6, passing through the plug 7 and entering the twisted flexible sheath 8 of the drive, the length of which can be up to 5 m.

For the return movement of the movable knife of the pruner, a screw return spring 9 is put on the rod 5. The pruner is turned on by the lever 10 having a wedge-shaped protrusion 11, and off by the flat spring 12 which pushes the lever 10.

The drive to the secator is effected from a square shaft 13 mounted on a special farm 14 located across the tractor at a height of 2 m above the ground. The square shaft 13 is connected by a driver 15 and a connecting rod 16 with crankshaft 17, which receives rotation from the tractor's power take-off shaft. The drive pulley 18 is connected to the flexible drive cable 6, and its casing 6 is mounted on the non-stationary part of the truss by means of adjusting screws 19.

Pruner works as follows.

№ 117051

Due to the oscillatory movements of the square shaft 13, the cable 6 of the flexible drive in its sheath 8 receives a reciprocating motion. Compression of the hand overcomes the force of the flat spring 12 of the lever 10 and its wedge-shaped protrusion 11, the entrance to the handle 1, shifts the stopper 7 and brings the turns of the sheath 8 closer. At the same time, the cable 6 t does not have the rod 5 and the movable knife 4, which closes the secantator's mouth. The backward movement of the knife is made by the return spring 9. If it is necessary to turn off the pruner, release the lever 10, the wedge-shaped protrusion 11 of which disengages from the stopper 7, as a result of which the latter moves inside the handle / by the amount of the working stroke of the rod 5 and the secateur stops its work.

Subject invention

Claims (2)

1.Automatic garden-grape pruner for trimming plants, consisting of two pivotally mounted (fixed and movable) knives, a tubular handle with a rod connected to a movable knife and cable, stem plugs, flexible drive plugs and a return helical spring, characterized by that, in order to simplify the design and increase its operational reliability, it uses a flexible mechanical drive from the connecting rod-crank mechanism. low mounted on the tractor. 2. The secator according to claim 1, wherein the activation mechanism is in the form of a spring-loaded lever hinged on the handle and provided with a wedge-shaped protrusion entering through the slot inside the handle and interacting with stopper of the flexible drive, the handle which is freely seated in the rear part, so that when you press the lever with your hand, the wedge-shaped protrusion moves the stopper back and thereby compresses the coils of the flexible cable sheath, as a result of which the movable pruning knife actuates the wedge-shaped stand out The p out of engagement with the stopper, which at the same time moves inside the handle and releases the flexible sheath of the cable from squeezing, as a result of which the closing of the movable knife with the stationary shear knife stops. from 3 at Fig 2