LINEAR ELECTRIC ENGINE OF RETURN-PULL MOVEMENT Russian patent published in 2018 - IPC H02K33/02 H01F7/16 

FIELD: electrical engineering.

SUBSTANCE: linear electric motor comprises a core 1 in the form of a cylinder with a through center axial hole 2 along the longitudinal axis O and an axial annular groove 3. Outer part of the cylinder, bounded by the annular groove 3, is the outer wall 4 of the core 1. In the end wall 6 of the core 1, at the level of the outer surface of the inner wall 5, six through ventilation openings 7 are formed, uniformly distributed along the circumference with a diameter of 10 % to 12 % of the radial dimension of the annular groove 3. On the inner surface of the inner wall 5, a supporting flange 8 is provided in the form of a protrusion into the space of the central axial hole 2. In the annular groove 3, an excitation winding 9 is arranged close to the outer 4 and end 6 walls. From the side of the inner wall 5 along the entire internal surface of the excitation winding 9, an air gap 10 is formed. In the annular groove 3, close to the outer wall 4 and the excitation winding 9 and with the working gap 11 with respect to the inner wall 5, a cover of the core 12 made in the form of a ring is installed, so that the excitation coil 9 is fixed by it. On the longitudinal axis O, a shaft 13 is mounted inside the central axial hole 2, at the outer end of which a fixing armature 14 is mounted on the side of the cover of the core 12 in the form of a disk with through technological holes 15 located along the average radius of the disk. In the working gap 11, there is a winding of the movable part 16 fixed to the shaft 13 by the fastening fitting 14 from the side of the outer end. On the longitudinal axis O, from the side of the lid between the support flange 8 and the fixing fixture 14 is a return spring 17 fixed to them.

EFFECT: technical result consists in reduction of dimensions, increase of manufacturability and reliability.

1 cl, 1 dwg