Patents by Inventor Kazuya Enokizono
Kazuya Enokizono 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).
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Publication number: 20220140681Abstract: In a rotating electric machine, an armature winding includes segmented conductors that include a coil side portion, housed in slots of the armature, and a coil end portion protruding from an armature core on both sides in an axial direction. The coil side portions are housed in the slots so as to form 2N+1 layers in a radial direction. The coil end portion connects two coil side portions respectively housed in the slots that are a predetermined pitch apart in a circumferential direction. The coil end portion includes a first coil end portion connecting the coil side portions of differing layers in the radial direction and a second coil portion connecting the coil side portions of the same layer. On both ends in the axial direction, any of the plurality of coil side portions that are housed in the slots is connected to the second coil end portion.Type: ApplicationFiled: November 2, 2021Publication date: May 5, 2022Applicant: DENSO CORPORATIONInventors: Toshiaki UGA, Hiroshi KANEIWA, Akihito KOIKE, Masayoshi YAMAMOTO, Kazuya ENOKIZONO, Hiroshi ENDO
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Patent number: 9692273Abstract: A rotating portion of a spindle motor includes a rotor magnet, a circular plate portion, and an annular raised portion that projects downward from the circular plate portion. A stationary portion includes a stator, a base portion, and an annular recessed portion configured to accommodate the raised portion. The raised portion includes an inner circumferential surface and an outer circumferential surface. The inner circumferential surface is positioned radially opposite a first side surface of the recessed portion with a first minute gap intervening therebetween. The outer circumferential surface is positioned radially opposite a second side surface of the recessed portion with a second minute gap intervening therebetween. The first minute gap has an axial dimension greater than an axial dimension of a seal portion.Type: GrantFiled: June 9, 2014Date of Patent: June 27, 2017Assignee: NIDEC CORPORATIONInventors: Yoichi Sekii, Kazuya Enokizono
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Patent number: 9667108Abstract: A brushless motor includes a stationary unit and a rotary unit rotatably supported with respect to the stationary unit. The stationary unit includes an armature and a base member arranged to support the armature. The rotary unit includes a magnet, a hub made of a magnetic material and a rotor yoke made of a magnetic material. The armature includes a plurality of coil patterns arranged along a circumferential direction. The hub includes an inner lower surface, an outer lower surface and a recess portion. The recess portion is arranged between the inner lower surface and the outer lower surface and depressed upward. At least a portion of the magnet is accommodated within the recess portion. At least one of the inner lower surface and the outer lower surface is positioned above a lower surface of the magnet.Type: GrantFiled: November 2, 2015Date of Patent: May 30, 2017Assignee: NIDEC CORPORATIONInventors: Toshikazu Himeno, Hongbing Du, Junichi Hashimoto, Kazuya Enokizono
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Publication number: 20170058852Abstract: A starter for an engine is provided which includes an electromagnetic brake device and a pinion thrust mechanism. The electromagnetic brake device holds a planetary carrier from rotating. The pinion thrust mechanism converts rotational motion of an internal gear into linear motion of a pinion when the rotation of the planetary carrier is locked. The pinion thrust mechanism includes a cylindrical cam cylinder, a starter housing, a thrust collar rotatable relative to the pinion, and an engaging pin. The cam cylinder is joined to the internal gear and has a circumferential extending cam groove. The starter housing has a straight groove traversing the cam groove. The engaging pin engages both the cam groove and the straight groove and is moved linearly with rotation of the cam cylinder. This enables the linear movement of the pinion regardless of a helix angle of the spline mounted on the output shaft.Type: ApplicationFiled: August 29, 2016Publication date: March 2, 2017Applicant: DENSO CORPORATIONInventors: Yoshito TAKAGI, Eitaro TANAKA, Kazuya ENOKIZONO
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Patent number: 9318928Abstract: A brushless motor includes a plate-shaped armature and a magnet facing either one of a top surface and a bottom surface of the armature. An inner peripheral surface of a base member and an outer peripheral surface of a bearing mechanism contact with each other or face each other in a diametrical direction with an adhesive therebetween in a first fixing part. Further, a rotor yoke and a hub protrusion contact with each other or face each other in a diametrical direction with an adhesive therebetween in a second fixing part. Then, a press-fitting or adhesion is carried out in the other of the first and the second fixing part.Type: GrantFiled: April 3, 2013Date of Patent: April 19, 2016Assignee: NIDEC CORPORATIONInventors: Toshikazu Himeno, Hongbing Du, Junichi Hashimoto, Kazuya Enokizono
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Publication number: 20160056675Abstract: A brushless motor includes a stationary unit and a rotary unit rotatably supported with respect to the stationary unit. The stationary unit includes an armature and a base member arranged to support the armature. The rotary unit includes a magnet, a hub made of a magnetic material and a rotor yoke made of a magnetic material. The armature includes a plurality of coil patterns arranged along a circumferential direction. The hub includes an inner lower surface, an outer lower surface and a recess portion. The recess portion is arranged between the inner lower surface and the outer lower surface and depressed upward. At least a portion of the magnet is accommodated within the recess portion. At least one of the inner lower surface and the outer lower surface is positioned above a lower surface of the magnet.Type: ApplicationFiled: November 2, 2015Publication date: February 25, 2016Applicant: NIDEC CORPORATIONInventors: Toshikazu Himeno, Hongbing Du, Junichi Hashimoto, Kazuya Enokizono
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Patent number: 9209656Abstract: A brushless motor includes a stationary unit and a rotary unit rotatably supported with respect to the stationary unit. The stationary unit includes an armature and a base member arranged to support the armature. The rotary unit includes a magnet, a hub made of a magnetic material and a rotor yoke made of a magnetic material. The armature includes a plurality of coil patterns arranged along a circumferential direction. The hub includes an inner lower surface, an outer lower surface and a recess portion. The recess portion is arranged between the inner lower surface and the outer lower surface and depressed upward. At least a portion of the magnet is accommodated within the recess portion. At least one of the inner lower surface and the outer lower surface is positioned above a lower surface of the magnet.Type: GrantFiled: April 22, 2013Date of Patent: December 8, 2015Assignee: NIDEC CORPORATIONInventors: Toshikazu Himeno, Hongbing Du, Junichi Hashimoto, Kazuya Enokizono
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Publication number: 20150015106Abstract: A rotating portion of a spindle motor includes a rotor magnet, a circular plate portion, and an annular raised portion that projects downward from the circular plate portion. A stationary portion includes a stator, a base portion, and an annular recessed portion configured to accommodate the raised portion. The raised portion includes an inner circumferential surface and an outer circumferential surface. The inner circumferential surface is positioned radially opposite a first side surface of the recessed portion with a first minute gap intervening therebetween. The outer circumferential surface is positioned radially opposite a second side surface of the recessed portion with a second minute gap intervening therebetween. The first minute gap has an axial dimension greater than an axial dimension of a seal portion.Type: ApplicationFiled: June 9, 2014Publication date: January 15, 2015Inventors: Yoichi SEKII, Kazuya ENOKIZONO
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Patent number: 8867166Abstract: A spindle motor includes a flat stator, a rotor magnet arranged above the stator, and a magnetic portion made of a ferromagnetic material. The magnetic portion is positioned lower than the stator and the magnetic portion are axially overlapped with coils. A magnetic attraction force is generated between the magnetic portion and the rotor magnet. Since the magnetic portion is positioned lower than the stator, it is possible to cause magnetic fluxes to efficiently flow between the rotor magnet and the stator. Further, the stator includes a protrusion protruded radially outward beyond an outer circumferential portion of a rotor hub. Accordingly, in a plan view, the stator is positioned radially outward of the rotor hub.Type: GrantFiled: January 31, 2013Date of Patent: October 21, 2014Assignee: Nidec CorporationInventors: Shigeharu Sumi, Toshikazu Himeno, Hongbing Du, Junichi Hashimoto, Kazuya Enokizono
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Patent number: 8659850Abstract: A stationary unit of a brushless motor includes a flat armature and a base member arranged to support the armature. The armature includes a power supply portion to which a lead wire is connected. The base member includes a wall portion and a window portion. The wall portion is radially opposed to an outer edge portion of the armature. The window portion is positioned below the power supply portion to axially extend through the base member. An adhesive agent exists between the wall portion and the outer edge portion of the armature. Accordingly, the base member and the armature are strongly fixed to each other. Further, a sealing material is interposed between a whole periphery of an edge of the window portion and the armature, so that the window portion is sealed.Type: GrantFiled: February 28, 2013Date of Patent: February 25, 2014Assignee: Nidec CorporationInventors: Toshikazu Himeno, Hongbing Du, Junichi Hashimoto, Kazuya Enokizono
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Publication number: 20130313935Abstract: A brushless motor includes a stationary unit and a rotary unit rotatably supported with respect to the stationary unit. The stationary unit includes an armature and a base member arranged to support the armature. The rotary unit includes a magnet, a hub made of a magnetic material and a rotor yoke made of a magnetic material. The armature includes a plurality of coil patterns arranged along a circumferential direction. The hub includes an inner lower surface, an outer lower surface and a recess portion. The recess portion is arranged between the inner lower surface and the outer lower surface and depressed upward. At least a portion of the magnet is accommodated within the recess portion. At least one of the inner lower surface and the outer lower surface is positioned above a lower surface of the magnet.Type: ApplicationFiled: April 22, 2013Publication date: November 28, 2013Applicant: NIDEC CORPORATIONInventors: Toshikazu Himeno, Hongbing Du, Junichi Hashimoto, Kazuya Enokizono
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Publication number: 20130258522Abstract: A stationary unit of a brushless motor includes a flat armature and a base member arranged to support the armature. The armature includes a power supply portion to which a lead wire is connected. The base member includes a wall portion and a window portion. The wall portion is radially opposed to an outer edge portion of the armature. The window portion is positioned below the power supply portion to axially extend through the base member. An adhesive agent exists between the wall portion and the outer edge portion of the armature. Accordingly, the base member and the armature are strongly fixed to each other. Further, a sealing material is interposed between a whole periphery of an edge of the window portion and the armature, so that the window portion is sealed. (FIG.Type: ApplicationFiled: February 28, 2013Publication date: October 3, 2013Applicant: NIDEC CORPORATIONInventors: Toshikazu Himeno, Hongbing Du, Junichi Hashimoto, Kazuya Enokizono
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Publication number: 20130257229Abstract: A brushless motor includes a plate-shaped armature and a magnet facing either one of a top surface and a bottom surface of the armature. An inner peripheral surface of a base member and an outer peripheral surface of a bearing mechanism contact with each other or face each other in a diametrical direction with an adhesive therebetween in a first fixing part. Further, a rotor yoke and a hub protrusion contact with each other or face each other in a diametrical direction with an adhesive therebetween in a second fixing part. Then, a press-fitting or adhesion is carried out in the other of the first and the second fixing part.Type: ApplicationFiled: April 3, 2013Publication date: October 3, 2013Applicant: NIDEC CORPORATIONInventors: Toshikazu Himeno, Hongbing Du, Junichi Hashimoto, Kazuya Enokizono