公开(公告)号：EP4472043A1

公开(公告)日：2024-12-04

申请号：EP22924063.5

申请日：2022-11-18

Applicant: NHK Spring Co., Ltd.

Inventor： KOBAYASHI, Dai ,  HIROTA, Yuji

IPC: H02K15/04 ,  H02K15/085

Abstract: The present disclosure effectively suppresses displacement of segment coils in the axial direction of a core when the ends of segment coil leg parts are bent. This production method produces a stator (10) that comprises a plurality of segment coils (40) that are annularly arranged in a plurality of layers (46A, 46B, 46C) that overlap in the radial direction of a stator core (14). The production method involves a tool (74) that has teeth (76A, 76B, 76C) being moved by a robot manipulator (72) and the teeth (76A, 76B, 76C) being inserted between the ends of leg parts (42) of the layers (46A, 46B, 46C). The ends that engage the teeth (76A, 76B, 76C) are thereby bent so as to be substantially crank-shaped. Before the teeth (76A, 76B, 76C) are inserted between the ends, a restraining jig (86) is inserted between bend parts (44) of the segment coils (40) of the layers (46A, 46B, 46C) and an end surface (14A) of the stator core (14) that is on one side in the axial direction.

公开(公告)号：EP4472042A1

公开(公告)日：2024-12-04

申请号：EP22924062.7

申请日：2022-11-18

Applicant: NHK Spring Co., Ltd.

Inventor： KOBAYASHI, Dai ,  HIROTA, Yuji

IPC: H02K15/04 ,  H02K15/085

Abstract: The present disclosure effectively prevents a segment coil from being displaced in the axial direction of a core when the terminal of a segment coil leg portion is bent in the radial direction of the core. With this manufacturing method, a stator provided with a plurality of segment coils (40), both leg portions (42A, 42B) of which are inserted into each slot of a stator core and which are overlapped in the radial direction of the stator core into multiple layers (46A, 46B, 46C) and aligned in an annular shape, is manufactured. In this manufacturing method, a tool (74) having teeth (76A, 76B, 76C) is moved by a robot manipulator and thereby the teeth (76A, 76B, 76C) are inserted between the terminals of the leg portions (42) of the respective layers (46A, 46B, 46C). The tool (74) is then turned by the robot manipulator (72) to the outside in the radial direction of the stator core by setting a clamping portion for clamping the leg portions (42) by a clamp (78) as the rotation center K1 and thereby the teeth (76A, 76B, 76C) are tilted.

公开(公告)号：EP4472041A1

公开(公告)日：2024-12-04

申请号：EP22924061.9

申请日：2022-11-18

Applicant: NHK Spring Co., Ltd.

Inventor： KOBAYASHI, Dai ,  HIROTA, Yuji

IPC: H02K15/04 ,  H02K15/085

Abstract: The present disclosure prevents the isolating coating of the terminal of a segment coil leg portion from being damaged when an inter-layer gap is enlarged. With this manufacturing method, a stator provided with a plurality of segment coils (40), both leg portions (42A, 42B) of which are inserted into each slot of a stator core and which are overlapped in the radial direction of the stator core into a plurality of layers (46A, 46B, 46C) and aligned in an annular shape, is manufactured. In this manufacturing method, a tool (74) having teeth (76A, 76B, 76C) is moved by a robot manipulator and thereby the teeth (76A, 76B, 76C) are inserted between the terminals of the leg portions (42) of the respective layers (46A, 46B, 46C). When inserted, the tool (74) is tilted in the insertion direction of the teeth (76A, 76B, 76C) and around the axis orthogonal to the radial direction and thereby the ends of the teeth (76A, 76B, 76C) are made non-contact with the insulating coatings of the terminals of the leg portions (42).