SU111576A1 - Electric perforator - Google Patents

Description

Electric perforators for drilling holes by a rotary percussion method are known.

A feature of the proposed electric perforator is that in order to hit the drill tip, the drill rod is applied on the shaft of an electric motor, a cam disk sitting inclined to its axis, combined with a hammer-rim.

This implementation provides improved efficiency and improves the operating conditions of the electric perforator The drawing shows an electric perforator in a longitudinal section.

The electric perforator consists of the following main parts: electric motor U, cam disc 2. shtoka 3, piston 4, cylinder 5, safety rubber buffer 6, rod 7, hammer 8, water pipe 9, sealing ring 10, swiveling box 11 and ratchet pawl 12 .

The motor shaft / is connected to the axis of the cam disc 2 by an elastic clutch.

The cam disk 2 is located on an axis enclosed in tapered roller bearings, iodine angle of 40 °. The rod 5 has two needle bearings of a special design with a conical surface. The washer screwed on the free end of the rod 3 is placed in the chamber wedge 4 between the coil spring and the rubber gasket. finger rod 7.

The process of electric perforator is as follows. The rotation of the cam disc 2 from the electric motor 1 causes the reciprocating movement of the brush 5 to move backward. When moving to the extreme right position, the rod 3 pushes the latter with its washer placed in the chamber of the piston 4. The spring is compressed by the acceleration forces. At the moment of slowing the stroke of the rod, the piston under the action of inertia and decompression of the spring

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way with. The maximum speed obtained and strikes the striker 8. After striking the rod with its washer through the rubber pad, it smoothly picks up the piston and moves it to the left.

In this case, the spiral spring is compressed, plosh, and the inertia of the piston - Then the cycle is repeated.

The motor 7 also receives a rotation from the rod 7, at the end of which the ratchet pawl 12 is turned eccentrically, turning the rotary bush //, which transmits the rotation to the drill rod.

Subject invention

An electric perforator for drilling holes by a shock-rotational method, characterized in that in order to hit the drill tip of the drill string, a cam disk is mounted inclined to its axis and coupled with a hammer.