US 11,990,792 B2
Stator with split core and yoke with protrusions and recesses engaging together and surrounding the split core
Tsuyoshi Matsuda, Kariya (JP); Kazuhiro Miura, Kariya (JP); Yuuya Asai, Kariya (JP); Takashi Nagaya, Kariya (JP); Takumi Okano, Kariya (JP); Isoshi Soga, Kariya (JP); and Kazuya Nagasaka, Kariya (JP)
Assigned to DENSO CORPORATION, Kariya (JP)
Filed by DENSO CORPORATION, Kariya (JP)
Filed on Mar. 26, 2021, as Appl. No. 17/213,438.
Application 17/213,438 is a division of application No. 16/275,804, filed on Feb. 14, 2019, granted, now 11,011,947.
Application 16/275,804 is a continuation of application No. PCT/JP2017/030221, filed on Aug. 24, 2017.
Claims priority of application No. 2016-167804 (JP), filed on Aug. 30, 2016; and application No. 2017-110944 (JP), filed on Jun. 5, 2017.
Prior Publication US 2021/0218296 A1, Jul. 15, 2021
Int. Cl. H02K 1/17 (2006.01); F16B 2/08 (2006.01); H02K 1/18 (2006.01); H02K 15/03 (2006.01)
CPC H02K 1/17 (2013.01) [F16B 2/08 (2013.01); H02K 1/185 (2013.01); H02K 15/03 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A stator comprising:
a split core having an annular shape and including core pieces arranged circumferentially; and
a wound yoke having a band shape and arranged on an outer circumferential wall surface of the split core, wherein
the wound yoke is arranged along a circumferential direction of the outer circumferential wall surface of the split core,
the wound yoke has at least one protrusion formed at one end thereof,
the wound yoke has at least one recess formed at another end thereof, the recess facing and engaging with the protrusion in the circumferential direction in a state where the wound yoke is arranged along the circumferential direction of the outer circumferential wall surface of the split core,
the recess includes a first hole close to an opening of the recess, and a second hole which is spaced more from the opening than the first hole is from the opening, the second hole communicating with the first hole,
a size of the first hole in an axial direction orthogonal to the circumferential direction is smaller than a size of the second hole in the axial direction,
a distal end portion of the protrusion is compressed in the circumferential direction such that the distal end portion of the protrusion has a spread part expanded in the axial direction, and
the protrusion engages with the recess in a state where a surface of the spread part facing a base of the protrusion is in contact with a step formed between the first hole and the second hole.