Patents by Inventor Yasushi Nishikuma
Yasushi Nishikuma has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 11557931Abstract: A stator for a rotary electric machine includes a stator coil configured such that a tip end of a conductor segment bent in a stator circumferential direction is joined to a tip end of another conductor segment in the same phase. A conductive material is exposed from the tip ends of the conductor segments, and a distance between the tip ends in different phases and adjacent to each other in the stator circumferential direction is larger than a distance between the tip ends in the same phase and adjacent to each other in the stator circumferential direction.Type: GrantFiled: June 18, 2020Date of Patent: January 17, 2023Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Yasushi Nishikuma
-
Patent number: 11223259Abstract: To effectively cover a coil end with a resin layer. A method for manufacturing a stator includes a first resin layer forming step (ii) of forming a first thermoset resin layer by impregnating the tip end side of a coil end with first thermoset resin, the coil end protruding from the core of the stator, the first thermoset resin having liquidity; a second resin layer forming step (iii) of forming a second thermoset resin layer on the first thermoset resin layer by dropping second thermoset resin from the core side of the coil end toward the tip end side; and a curing step of curing the first thermoset resin and the second thermoset resin.Type: GrantFiled: November 15, 2018Date of Patent: January 11, 2022Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATIONInventors: Masashi Kawai, Yasushi Nishikuma, Hiroaki Takeda
-
Patent number: 11081945Abstract: Provided is a manufacturing method for a stator coil in which end portions of one-side conductor segments inserted into slots from the side of one end in an axial direction of a stator core and end portions of other-side conductor segments are connected to each other through coupling members inside the slots. The method includes: pressing in the one-side conductor segment or the other-side conductor segment in an insertion direction in a state where the end portion of the one-side conductor segment or the end portion of the other-side conductor segment, or an end portion of the coupling member has been moved toward the inner circumferential side of the stator core; connecting the end portion of the one-side conductor segment and the end portion of the other-side conductor segment to each other; and executing the pressing in and the connecting sequentially from the outer circumferential side of the stator core.Type: GrantFiled: August 26, 2019Date of Patent: August 3, 2021Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yasushi Nishikuma, Daisuke Mizushima, Yasuyuki Hirao
-
Publication number: 20200321819Abstract: A stator for a rotary electric machine includes a stator coil configured such that a tip end of a conductor segment bent in a stator circumferential direction is joined to a tip end of another conductor segment in the same phase. A conductive material is exposed from the tip ends of the conductor segments, and a distance between the tip ends in different phases and adjacent to each other in the stator circumferential direction is larger than a distance between the tip ends in the same phase and adjacent to each other in the stator circumferential direction.Type: ApplicationFiled: June 18, 2020Publication date: October 8, 2020Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Yasushi NISHIKUMA
-
Publication number: 20200112238Abstract: Provided is a manufacturing method for a stator coil in which end portions of one-side conductor segments inserted into slots from the side of one end in an axial direction of a stator core and end portions of other-side conductor segments are connected to each other through coupling members inside the slots. The method includes: pressing in the one-side conductor segment or the other-side conductor segment in an insertion direction in a state where the end portion of the one-side conductor segment or the end portion of the other-side conductor segment, or an end portion of the coupling member has been moved toward the inner circumferential side of the stator core; connecting the end portion of the one-side conductor segment and the end portion of the other-side conductor segment to each other; and executing the pressing in and the connecting sequentially from the outer circumferential side of the stator core.Type: ApplicationFiled: August 26, 2019Publication date: April 9, 2020Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yasushi Nishikuma, Daisuke Mizushima, Yasuyuki Hirao
-
Publication number: 20190157949Abstract: To effectively cover a coil end with a resin layer. A method for manufacturing a stator includes a first resin layer forming step (ii) of forming a first thermoset resin layer by impregnating the tip end side of a coil end with first thermoset resin, the coil end protruding from the core of the stator, the first thermoset resin having liquidity; a second resin layer forming step (iii) of forming a second thermoset resin layer on the first thermoset resin layer by dropping second thermoset resin from the core side of the coil end toward the tip end side; and a curing step of curing the first thermoset resin and the second thermoset resin.Type: ApplicationFiled: November 15, 2018Publication date: May 23, 2019Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATIONInventors: Masashi KAWAI, Yasushi NISHIKUMA, Hiroaki TAKEDA
-
Publication number: 20180262071Abstract: A stator for a rotary electric machine includes a stator coil configured such that a tip end of a conductor segment bent in a stator circumferential direction is joined to a tip end of another conductor segment in the same phase. A conductive material is exposed from the tip ends of the conductor segments, and a distance between the tip ends in different phases and adjacent to each other in the stator circumferential direction is larger than a distance between the tip ends in the same phase and adjacent to each other in the stator circumferential direction.Type: ApplicationFiled: March 7, 2018Publication date: September 13, 2018Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Yasushi NISHIKUMA
-
Patent number: 9350219Abstract: A purpose is to provide a rotor manufacturing method including a magnet assembly formed of divided permanent magnet pieces to enhance insulation and advance cost reduction. The rotor manufacturing method includes forming permanent magnet pieces by dividing a permanent magnet, arranging and resin-molding the permanent magnet pieces to form a magnet assembly, and placing the magnet assembly in a rotor. The method includes placing the permanent magnet pieces all together in a molding die for use in resin-molding, and moving the permanent magnet pieces by a moving device provided in the molding die to move the permanent magnet pieces within the molding die, thereby forming the magnet assembly.Type: GrantFiled: February 14, 2011Date of Patent: May 24, 2016Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tetsuyoshi Fukaya, Yasushi Nishikuma
-
Patent number: 9331557Abstract: A method for cleaving a plate-shaped workpiece formed with two or more linear recesses into three or more parts includes: a first positioning step of holding the workpiece by a positioning unit in place to position a first linear recess; a first clamping step of clamping one side of the first linear recess by a fixing clamp and the other side by a rotating clamp; a first cleaving step of moving back the positioning unit and rotationally separating the rotating clamp; a second positioning step of releasing the clamps and causing the positioning unit to position a second linear recess; a second clamping step of clamping one side of the second linear recess by the fixing clamp and the other side by the rotating clamp, and a second cleaving step of moving back the positioning unit and rotationally separating the rotating clamp.Type: GrantFiled: March 31, 2011Date of Patent: May 3, 2016Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shingo Fubuki, Tetsuyoshi Fukaya, Katsuhiko Tatebe, Yasushi Nishikuma
-
Patent number: 9065316Abstract: A stator structure for a rotary electric machine includes a stator core having a cylindrical shape in which slots and pole pieces are formed on an inner peripheral side and alternately arranged in a circumferential direction, a conductor segment which is a conducting wire having a rectangular cross section inserted in one of the slots through an insulator being connected with a conductor segment similarly inserted in another slot to form a coil. Each insulator has a shape including a pair of opposite side surface portions connected with an intermediate portion along a wall surface defining the slot. Each insulator includes end protrusions facing each other at free ends of the side surface portions to position the conductor segments. The insulators are made of an insulating and elastic material.Type: GrantFiled: December 23, 2009Date of Patent: June 23, 2015Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shingo Fubuki, Yasuji Taketsuna, Yasushi Nishikuma, Katsuhiko Tatebe, Tomohiro Takenaga
-
Patent number: 8967441Abstract: A magnet splitting device includes a one-side holder for holding a plurality of pre-split magnets on one sides of respective splitting grooves, an other-side holder for holding the magnets on the other sides, and an actuating unit for causing relative movement of the other-side holder to split the magnets all at once. The other-side holder includes a plurality of other-side independent holding parts for holding the magnets independently. The actuating unit includes a plurality of independent actuating parts for moving the other-side independent holding parts independently and a simultaneous operating part for simultaneously operating the holding parts.Type: GrantFiled: July 10, 2009Date of Patent: March 3, 2015Assignee: Toyota Jidosha Kabushiki KaishaInventors: Yasushi Nishikuma, Yasuji Taketsuna
-
Publication number: 20140109392Abstract: In a method for manufacturing a rotor in which a plurality of cleaved magnet pieces are mounted in a rotor core with cleaved surfaces of the cleaved magnet pieces in an engaged state. In a cleaving step, a magnet workpiece having a recess in a surface thereof is cleaved at the recess as a starting point, thereby producing a first magnet piece and a second magnet piece. In a surface processing step, the cleaved surface is processed to reduce protrusions on the cleaved surface of the first magnet piece. Accordingly, the engagement between the cleaved surfaces is poor, the contact area is reduced, and the contact resistance is increased. As a result thereof, the eddy currents in the cut magnets flow less easily, and loss caused by eddy currents may be decreased.Type: ApplicationFiled: May 19, 2011Publication date: April 24, 2014Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yasushi Nishikuma, Tetsuyoshi Fukaya, Katsuhiko Tatebe, Shingo Fubuki
-
Patent number: 8672013Abstract: An apparatus for handling a magnet handles a plurality of split magnets obtained by sequentially splitting a magnet to be split from one end thereof. The apparatus for handling a magnet is equipped with a mechanism which arranges a split magnet with respect to a previously split magnet so that the magnets are put on top of one another and the corresponding irregularities of a pair of split surfaces thereof are arranged opposite each other. The apparatus for handling a magnet is also equipped with a section where the plurality of split magnets are arranged.Type: GrantFiled: July 29, 2009Date of Patent: March 18, 2014Assignee: Toyota Jidosha Kabushiki KaishaInventors: Yasushi Nishikuma, Yasuji Taketsuna
-
Publication number: 20140013582Abstract: A method for cleaving a plate-shaped workpiece formed with two or more linear recesses into three or more parts includes: a first positioning step of holding the workpiece by a positioning unit in place to position a first linear recess; a first clamping step of clamping one side of the first linear recess by a fixing clamp and the other side by a rotating clamp; a first cleaving step of moving back the positioning unit and rotationally separating the rotating clamp; a second positioning step of releasing the clamps and causing the positioning unit to position a second linear recess; a second clamping step of clamping one side of the second linear recess by the fixing clamp and the other side by the rotating clamp, and a second cleaving step of moving back the positioning unit and rotationally separating the rotating clamp.Type: ApplicationFiled: March 31, 2011Publication date: January 16, 2014Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shingo Fubuki, Tetsuyoshi Fukaya, Katsuhiko Tatebe, Yasushi Nishikuma
-
Patent number: 8375562Abstract: A manufacturing method of a rotating electric machine includes the steps of: preparing a plurality of split stator cores annularly arranged at intervals in a circumferential direction so that their inner end portions are aligned with an imaginary circle and a support member positioned inside the imaginary circle in a radial direction to support the inner end portions of split stator cores; mounting a fastening member on outer peripheries of split stator cores to press respective split stator cores inward in the radial direction; and displacing split stator cores pressed by fastening member inward in the radial direction while the support member is supporting split stator cores.Type: GrantFiled: October 21, 2008Date of Patent: February 19, 2013Assignee: Toyota Jidosha Kabushiki KaishaInventors: Yasuhiro Endo, Eiji Yamada, Yasushi Nishikuma, Kohei Yoshikawa
-
Publication number: 20120274165Abstract: A purpose is to provide a rotor manufacturing method including a magnet assembly formed of divided permanent magnet pieces to enhance insulation and advance cost reduction. The rotor manufacturing method includes forming permanent magnet pieces by dividing a permanent magnet, arranging and resin-molding the permanent magnet pieces to form a magnet assembly, and placing the magnet assembly in a rotor. The method includes placing the permanent magnet pieces all together in a molding die for use in resin-molding, and moving the permanent magnet pieces by a moving device provided in the molding die to move the permanent magnet pieces within the molding die, thereby forming the magnet assembly.Type: ApplicationFiled: February 14, 2011Publication date: November 1, 2012Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tetsuyoshi Fukaya, Yasushi Nishikuma
-
Publication number: 20120256512Abstract: A stator structure for a rotary electric machine includes a stator core having a cylindrical shape in which slots and pole pieces are formed on an inner peripheral side and alternately arranged in a circumferential direction, a conductor segment which is a conducting wire having a rectangular cross section inserted in one of the slots through an insulator being connected with a conductor segment similarly inserted in another slot to form a coil. Each insulator has a shape including a pair of opposite side surface portions connected with an intermediate portion along a wall surface defining the slot. Each insulator includes end protrusions facing each other at free ends of the side surface portions to position the conductor segments. The insulators are made of an insulating and elastic material.Type: ApplicationFiled: December 23, 2009Publication date: October 11, 2012Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shingo Fubuki, Yasuji Taketsuna, Yasushi Nishikuma, Katsuhiko Tatebe, Tomohiro Takenaga
-
Publication number: 20120125969Abstract: An apparatus for handling a magnet handles a plurality of split magnets obtained by sequentially splitting a magnet to be split from one end thereof. The apparatus for handling a magnet is equipped with a mechanism which arranges a split magnet with respect to a previously split magnet so that the magnets are put on top of one another and the corresponding irregularities of a pair of split surfaces thereof are arranged opposite each other. The apparatus for handling a magnet is also equipped with a section where the plurality of split magnets are arranged.Type: ApplicationFiled: July 29, 2009Publication date: May 24, 2012Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yasushi Nishikuma, Yasuji Taketsuna
-
Publication number: 20120104064Abstract: A magnet splitting device includes a one-side holder for holding a plurality of pre-split magnets on one sides of respective splitting grooves, an other-side holder for holding the magnets on the other sides, and an actuating unit for causing relative movement of the other-side holder to split the magnets all at once. The other-side holder includes a plurality of other-side independent holding parts for holding the magnets independently. The actuating unit includes a plurality of independent actuating parts for moving the other-side independent holding parts independently and a simultaneous operating part for simultaneously operating the holding parts.Type: ApplicationFiled: July 10, 2009Publication date: May 3, 2012Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yasushi Nishikuma, Yasuji Taketsuna
-
Patent number: 8115353Abstract: A connection line has a first bent portion bent toward a coil's main body in a vicinity of a stator core's axial length limit line. Furthermore, the connection line at a portion closer to the coil's main body than the first bent portion has a second bent portion bent away from the coil's main body. Furthermore, the connection line has a third bent portion bent away from the coil's main body to have a connection portion along an end surface of the terminal member in contact therewith generally parallel thereto.Type: GrantFiled: July 17, 2008Date of Patent: February 14, 2012Assignee: Toyota Jidosha Kabushiki KaishaInventors: Hiroaki Urano, Kazutaka Tatematsu, Yasuji Taketsuna, Yasushi Nishikuma, Yutaka Komatsu