ELECTRIC MOTOR DEVICE Russian patent published in 2007 - IPC F04B17/04 H01F7/121 

FIELD: electric engineering and mechanical engineering, possible use in various electro-conductive devices, in particular, chisel hammers, pile hammering devices, during beading, in drilling equipment.

SUBSTANCE: suggested electric motor device contains serially installed electromagnets, interacting with elements positioned on a rod, while that rod is mounted with possible axial movement in aperture of electromagnet cores. In accordance to invention, electromagnetic pairs consisting of electromagnet and iron disk interacting with electromagnet, are serially placed relatively to each other in such a way, that the distance between electromagnet and iron disk of each following electromagnetic pair is increased by one and the same value, while iron disks except for the last one are spring-loaded relatively to bushings fixedly held on the rod and mounted on the rod with possible axial movement, while the last iron disk is held fixedly on the end of rod and spring-loaded relatively to previous iron disk.

EFFECT: increased drive of electric motor device rod due to increased magnetic effect of its electromagnets.

3 cl, 6 dwg