SU28465A1 - Electric rotary hammer drill with continuous rotation - Google Patents

Description

Electro perforators with continuous rotation of a drill are known, with a hammer enclosed in a common casing with a working mechanism and with rotation transmission from the Motor by means of gears. In the proposed electric perforator, an annular spring is applied that is fixed at the end of the striker stem and is used for communication to the striker of reciprocating movement by means of a cam which is enclosed in an electric motor shaft.

In FIG. 1 image; a longitudinal section of the perforator; FIG. 2 - view of the failure of the annular spring.

On the shaft 5 of the perforator (Fig. 1) tightly, the plate J4, acting on the spring 13, is fixed. On the rod 10 there is a –Bee 75; acting on the plate 14. The spring 7 / serves to create a striking impact / 5 on the plate 14. At the end of the stem 10, an elastic annular spring 76 (FIG. 2) is attached, fixed on one side tightly to the perforator 7. The spring 16 is driven by a cam 9 wedged on the shaft of the electric motor 2. With the help of bevel gears 3v 4 and gear shaft 5, the operation of the electric motor 2 is transmitted to the cylindrical gear 6, which engages with. gear 7, sitting on the shaft 8 of the perforator.

The gear 7 together with the shaft 8 does not move, as the shaft 8 moves freely in the longitudinal direction on the shonekov attached to the shaft.

The operation of the perforator is as follows.

The power of the electric motor 2/6 with the help of a cam 9, stuck in the shaft of the electric motor 2, moves towards the motor; the spring // is compressed in the direction of the perforator casing 1, a shock-absorbing shock.

. In the following position, the cam 9 jumps off the spring 76, i6 and 77 are released, producing a blow through the striker 75 to the plate 14, from which the hammer drill shaft 8 receives an impact movement.

The spring 7J, being a shock absorber, at the moment of impact is compressed, after the impact it is released, pushing the plate 14 back. Through bevel gears, 3 and 4 to the gear shaft 5 of the cylindrical gears 6 and 7, the shaft 8 of the perforator continuously receives rotational movement.

Item 1

Impact electric perforator with continuous rotation of the drill, with the.-Motor, enclosed in a common casing with a working mechapizgl with the transfer of rotation from the motor through the "system

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gears, characterized by the application of an annular spring / b, fixed to the end of the rod fO of the striker / 5 m serving for the message about the return of on-and-d. the stepping movement of the striker by means of a cam 9 wedged on the shaft of the electric motor.

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Fig, 1

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