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公开(公告)号:US20200317100A1
公开(公告)日:2020-10-08
申请号:US16761594
申请日:2018-11-15
Applicant: NHK Spring Co., Ltd.
Inventor: Yuichiro Yamauchi , Yu Yoda , Takuya Sato , Katsuji Goto , Masakazu Ando , Ayane Sato
Abstract: A joined body includes: a thin plate including through holes; first members each including: a base portion and a protruding portion inserted into one of the through holes; and a second member placed oppositely to the base portion via the thin plate and made of a material that is of a same kind as a material of the first members. The thin plate is made of a material having a specific gravity smaller than the materials of the first and the second members. The second member and an end portion of the protruding portion are connected together by melt-solidification. A post-joining hardness difference in a range of 30% along a direction orthogonal to a joint interface between the second member and the protruding portion, the range being centered on the joint interface, is equal to or less than 90% of a pre-joining hardness difference.
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公开(公告)号:US11498466B2
公开(公告)日:2022-11-15
申请号:US16761594
申请日:2018-11-15
Applicant: NHK Spring Co., Ltd.
Inventor: Yuichiro Yamauchi , Yu Yoda , Takuya Sato , Katsuji Goto , Masakazu Ando , Ayane Sato
IPC: B60N2/68 , B23K11/11 , B23K11/20 , F16B5/00 , F16B5/12 , B23K103/20 , B23K101/00
Abstract: A joined body includes: a thin plate including through holes; first members each including: a base portion and a protruding portion inserted into one of the through holes; and a second member placed oppositely to the base portion via the thin plate and made of a material that is of a same kind as a material of the first members. The thin plate is made of a material having a specific gravity smaller than the materials of the first and the second members. The second member and an end portion of the protruding portion are connected together by melt-solidification. A post-joining hardness difference in a range of 30% along a direction orthogonal to a joint interface between the second member and the protruding portion, the range being centered on the joint interface, is equal to or less than 90% of a pre-joining hardness difference.
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公开(公告)号:US12074486B2
公开(公告)日:2024-08-27
申请号:US17421537
申请日:2020-01-14
Applicant: NHK SPRING CO., LTD.
Inventor: Yohei Kameda , Yu Yoda
CPC classification number: H02K15/12 , H02K15/03 , H02K1/276 , Y10T29/49012
Abstract: A rotor includes a rotor core configured by laminated steel plates and a magnet insertion hole extending along an axial direction of the rotor core, with a resin interposed between a permanent magnet placed in the magnet insertion hole and an inner wall face of the magnet insertion hole. In a manufacturing method for this rotor, in a first process, the permanent magnet and the resin are integrated together to manufacture a resin-coated permanent magnet. Next, in a second process, the resin-coated permanent magnet is press-fitted into the magnet insertion hole. Next, in a third process, the post-second-process rotor core is heated to a temperature that is at least the temperature at which the resin softens. Next, in a fourth process, the post-third process rotor core is cooled.
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公开(公告)号:US11549535B2
公开(公告)日:2023-01-10
申请号:US16605353
申请日:2018-04-03
Applicant: NHK Spring Co., Ltd.
Inventor: Yuichiro Yamauchi , Ayane Sato , Katsuji Goto , Masakazu Ando , Takuya Sato , Yu Yoda , Shimpei Kurokawa , Masatake Kinoshita
Abstract: A joined body includes: a thin plate including through holes; a first member including a proximal portion having a portion contacting the thin plate, and a protruding portion that protrudes in relation to a contact surface of the proximal portion and is inserted through the through hole; and a second member arranged oppositely to the proximal portion via the thin plate and made of a material that is same as that of the first member. The thin plate is made of a material having a specific gravity smaller than that of the material forming the first and the second members. The second member and an end portion of the protruding portion are connected to each other, by a part of the second member and a part of the end portion being melt-solidified, the end portion being at a side opposite to a side connected to the proximal portion.
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