US 12,438,430 B2
Linear motor with varying width slider teeth
Takanori Yokochi, Aichi (JP); and Tatsuya Shizu, Aichi (JP)
Assigned to OKUMA, Aichi (JP)
Filed by OKUMA Corporation, Aichi (JP)
Filed on Mar. 31, 2023, as Appl. No. 18/193,936.
Claims priority of application No. 2022-062302 (JP), filed on Apr. 4, 2022.
Prior Publication US 2023/0318426 A1, Oct. 5, 2023
Int. Cl. H02K 41/03 (2006.01)
CPC H02K 41/031 (2013.01) 4 Claims
OG exemplary drawing
 
1. A linear motor comprising:
a stator having a plurality of salient poles arranged at uniform intervals along a direction of extension; and
a slider provided facing the stator and configured to move along the direction of extension of the stator,
wherein the slider comprises:
a yoke;
a plurality of teeth projecting from the yoke toward the stator and located sequentially along a direction of movement;
permanent magnets provided in respective magnet-receiving cavities located between the teeth;
coil-receiving cavities formed on outer sides of a teeth set composed of the plurality of teeth; and
a coil wound in the coil-receiving cavities, and
wherein the plurality of teeth project radially from the yoke toward the stator, and a width of each of the teeth as measured at a yoke side is narrower than its width as measured at a stator side, and
widths of all of the teeth as measured at their respective ends at the yoke side are equal to each other.