Patents by Inventor Hideo Terasawa
Hideo Terasawa 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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Patent number: 11218056Abstract: A first bearing box has, in one end face perpendicular to a direction along a rotor shaft and farther from a fan, an air outlet for air taken in through an air inlet to exit. A flow channel is defined between an outer peripheral surface of a cylindrical portion of the first bearing box continuous with the end face and a frame. A value obtained by dividing a distance between an outer periphery of blades in the fan and the air outlet by an outer radius of the blades is greater than or equal to a threshold.Type: GrantFiled: March 7, 2017Date of Patent: January 4, 2022Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Tatsuro Okubo, Hideo Terasawa
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Patent number: 11183910Abstract: A rotor includes a rotor core having slots on an outer periphery to receive rotor bars, short-circuit rings bonded to ends of the rotor bars to electrically connect the rotor bars together, core retainers located across the rotor core in a direction along a rotating shaft, and a deformation prevention portion located between each short-circuit ring and the rotor core. The deformation prevention portion is fixed to the short-circuit ring and to at least a portion of at least one rotor bar to reduce bending deformation of the portion of the rotor bar in a direction tangent to an outer peripheral surface of a portion of the rotor core of the rotor bar.Type: GrantFiled: March 6, 2017Date of Patent: November 23, 2021Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Tatsuro Okubo, Hideo Terasawa
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Patent number: 11101713Abstract: A vehicle motor is equipped with a downwind side air guiding member to guide air, flowing in from a suction port formed in an end of a frame at a first bracket side, through a stator ventilating path, into contact with an end portion of a stator coil, along the stator coil from an end portion of the stator coil, and then toward a stator core, and then to an exhaust port formed in a second bracket side of the frame end portion or in a second bracket.Type: GrantFiled: March 30, 2017Date of Patent: August 24, 2021Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Tatsuro Okubo, Hideo Terasawa
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Patent number: 10988147Abstract: A planetary gear device includes a bearing inner cylinder including an internal gear on the inner circumferential side, a bearing fitted on the outer circumference of the bearing inner cylinder, an output shaft outer cylinder fitted on the outer circumference of the bearing, and an output shaft end plate that fixedly supports the planetary carrier and transmits a rotation thereof to the output shaft outer cylinder. A wheel is fitted onto the outer circumference of the output shaft outer cylinder so as to prevent relative rotation. The bearing inner cylinder is fixed to a support frame. A drive motor is fixed coaxially with the planetary gear device on the side of the support frame opposite to the bearing inner cylinder, and a rotation shaft is coupled to the sun gear.Type: GrantFiled: March 29, 2016Date of Patent: April 27, 2021Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Michinori Hashimoto, Hideo Terasawa
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Patent number: 10870439Abstract: Two support frames support opposite wheels rollably on a rail and support the vehicle body through suspension systems. At one end, four L-shaped links and four support links are each coupled, bilaterally symmetrically and in front of and behind the wheels, to the two support frames in a manner allowing rotation on the support frames about an axis in the front-rear direction below and above the center axis of the wheels. In a bending portion in the middle, the L-shaped links are supported by the vehicle body rotatably about an axis in the front-rear direction, and the L-shaped links and support links are coupled at the other end to each other so as to allow rotation about an axis in the front-rear direction.Type: GrantFiled: March 29, 2016Date of Patent: December 22, 2020Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Michinori Hashimoto, Hideo Terasawa
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Patent number: 10767751Abstract: A first labyrinth seal includes: a drive shaft side annular protrusion that is formed on one of the slinger and the drive shaft seal plate and that protrudes over the circumference of the drive shaft; and a drive shaft side annular groove that is formed on the other of the slinger and the drive shaft seal plate and that recedes over the circumference of the shaft. A second labyrinth seal includes: a carrier-side annular protrusion that is formed on one of the carrier seal plate and the planetary carrier and that protrudes over the circumference of the shaft of the planetary carrier; and a carrier-side annular groove that is formed on the other of the carrier seal plate and the planetary carrier and that recedes over the circumference of the shaft.Type: GrantFiled: March 29, 2016Date of Patent: September 8, 2020Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Michinori Hashimoto, Hideo Terasawa
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Patent number: 10756605Abstract: Core slots are provided in an outer circumferential side of a rotor core and extend in an axial direction of a rotor shaft. A rotor conductor is a rod-shaped conductor inserted in each of the slots, and after insertion of the rotor conductor in each slot, a flared portion is formed flaring in a slot-transverse direction, and a propping-apart force occurring between the flared portion and both side wall surfaces of the slot fixes the rotor conductor to the slot. In an inner wall of an outer circumferential side of each slot abutting the flared portion, an unevenness is arranged along the axial direction of the rotor shaft.Type: GrantFiled: January 19, 2015Date of Patent: August 25, 2020Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Hideo Terasawa, Kenichi Nakagawa
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Publication number: 20200112224Abstract: A vehicle motor is equipped with a downwind side air guiding member to guide air, flowing in from a suction port formed in an end of a frame at a first bracket side, through a stator ventilating path, into contact with an end portion of a stator coil, along the stator coil from an end portion of the stator coil, and then toward a stator core, and then to an exhaust port formed in a second bracket side of the frame end portion or in a second bracket.Type: ApplicationFiled: March 30, 2017Publication date: April 9, 2020Applicant: Mitsubishi Electric CorporationInventors: Tatsuro OKUBO, Hideo TERASAWA
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Publication number: 20200096089Abstract: A first labyrinth seal includes: a drive shaft side annular protrusion that is formed on one of the slinger and the drive shaft seal plate and that protrudes over the circumference of the drive shaft; and a drive shaft side annular groove that is formed on the other of the slinger and the drive shaft seal plate and that recedes over the circumference of the shaft. A second labyrinth seal includes: a carrier-side annular protrusion that is formed on one of the carrier seal plate and the planetary carrier and that protrudes over the circumference of the shaft of the planetary carrier; and a carrier-side annular groove that is formed on the other of the carrier seal plate and the planetary carrier and that recedes over the circumference of the shaft.Type: ApplicationFiled: March 29, 2016Publication date: March 26, 2020Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Michinori HASHIMOTO, Hideo TERASAWA
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Publication number: 20200059133Abstract: A first bearing box has, in one end face perpendicular to a direction along a rotor shaft and farther from a fan, an air outlet for air taken in through an air inlet to exit. A flow channel is defined between an outer peripheral surface of a cylindrical portion of the first bearing box continuous with the end face and a frame. A value obtained by dividing a distance between an outer periphery of blades in the fan and the air outlet by an outer radius of the blades is greater than or equal to a threshold.Type: ApplicationFiled: March 7, 2017Publication date: February 20, 2020Applicant: Mitsubishi Electric CorporationInventors: Tatsuro OKUBO, Hideo TERASAWA
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Publication number: 20190386550Abstract: A rotor includes a rotor core having slots on an outer periphery to receive rotor bars, short-circuit rings bonded to ends of the rotor bars to electrically connect the rotor bars together, core retainers located across the rotor core in a direction along a rotating shaft, and a deformation prevention portion located between each short-circuit ring and the rotor core. The deformation prevention portion is fixed to the short-circuit ring and to at least a portion of at least one rotor bar to reduce bending deformation of the portion of the rotor bar in a direction tangent to an outer peripheral surface of a portion of the rotor core of the rotor bar.Type: ApplicationFiled: March 6, 2017Publication date: December 19, 2019Applicant: Mitsubishi Electric CorporationInventors: Tatsuro OKUBO, Hideo TERASAWA
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Publication number: 20190106126Abstract: A planetary gear device includes a bearing inner cylinder including an internal gear on the inner circumferential side, a bearing fitted on the outer circumference of the bearing inner cylinder, an output shaft outer cylinder fitted on the outer circumference of the bearing, and an output shaft end plate that fixedly supports the planetary carrier and transmits a rotation thereof to the output shaft outer cylinder. A wheel is fitted onto the outer circumference of the output shaft outer cylinder so as to prevent relative rotation. The bearing inner cylinder is fixed to a support frame. A drive motor is fixed coaxially with the planetary gear device on the side of the support frame opposite to the bearing inner cylinder, and a rotation shaft is coupled to the sun gear.Type: ApplicationFiled: March 29, 2016Publication date: April 11, 2019Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Michinori HASHIMOTO, Hideo TERASAWA
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Publication number: 20190084592Abstract: Two support frames support opposite wheels rollably on a rail and support the vehicle body through suspension systems. At one end, four L-shaped links and four support links are each coupled, bilaterally symmetrically and in front of and behind the wheels, to the two support frames in a manner allowing rotation on the support frames about an axis in the front-rear direction below and above the center axis of the wheels. In a bending portion in the middle, the L-shaped links are supported by the vehicle body rotatably about an axis in the front-rear direction, and the L-shaped links and support links are coupled at the other end to each other so as to allow rotation about an axis in the front-rear direction.Type: ApplicationFiled: March 29, 2016Publication date: March 21, 2019Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Michinori HASHIMOTO, Hideo TERASAWA
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Patent number: 10069197Abstract: An ATC antenna device provided on a body of a lead car to receive signals from outside. In the ATC antenna device, a pair of ATC antenna coils is disposed symmetrically with respect to a center line of the body as viewed in a traveling direction of the body, and the paired ATC antenna coils are connected in series and are of opposite phase. An ATC antenna support device is attached to the body to support the paired ATC antenna coils, and is disposed asymmetrically with respect to the center line.Type: GrantFiled: May 22, 2014Date of Patent: September 4, 2018Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Hideo Terasawa, Kenichi Nakagawa
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Publication number: 20180006537Abstract: Core slots are provided in an outer circumferential side of a rotor core and extend in an axial direction of a rotor shaft. A rotor conductor is a rod-shaped conductor inserted in each of the slots, and after insertion of the rotor conductor in each slot, a flared portion is formed flaring in a slot-transverse direction, and a propping-apart force occurring between the flared portion and both side wall surfaces of the slot fixes the rotor conductor to the slot. In an inner wall of an outer circumferential side of each slot abutting the flared portion, an unevenness is arranged along the axial direction of the rotor shaft.Type: ApplicationFiled: January 19, 2015Publication date: January 4, 2018Applicant: Mitsubishi Electric CorporationInventors: Hideo TERASAWA, Kenichi NAKAGAWA
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Patent number: 9791349Abstract: An end play measurement apparatus is provided that measures end play of a tapered roller bearing of a gear unit. The gear unit supports a large-gear shaft, with which a gear is fitted, via the tapered roller bearing. The end play measurement apparatus includes a power generation unit, which is fixed to the large-gear shaft and generates power to move the gear unit backward and forward in the axial direction, a position change unit, which is interposed between the power generation unit and the gear unit and changes the axial position of the gear unit by using the power of the power generation unit, and a booster mechanism, which has a free end that receives the power of the power generation unit to boost the power.Type: GrantFiled: June 13, 2013Date of Patent: October 17, 2017Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Michinori Hashimoto, Shinsaku Maeda, Hideo Terasawa
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Publication number: 20170237324Abstract: A plurality of slots are disposed in a stator iron core. A plurality of stator coils are formed into coils having a rectangular cross sectional shape. The stator coils are inserted into each of the slots in a double-layer winding system such that a lower coil is inserted on an interior side of one slot of the plurality of slots and an upper coil is inserted on an entry side of another slot of the plurality of slots. Each of the slots is provided with a space that enables the lower coil to be rotated on the interior side of the slot when the upper coil is lifted up from another slot.Type: ApplicationFiled: August 8, 2014Publication date: August 17, 2017Applicant: Mitsubishi Electric CorporationInventors: Hideo TERASAWA, Kenichi NAKAGAWA
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Publication number: 20170110791Abstract: An ATC antenna device provided on a body of a lead car to receive signals from outside. In the ATC antenna device, a pair of ATC antenna coils is disposed symmetrically with respect to a center line of the body as viewed in a traveling direction of the body, and the paired ATC antenna coils are connected in series and are of opposite phase. An ATC antenna support device is attached to the body to support the paired ATC antenna coils, and is disposed asymmetrically with respect to the center line.Type: ApplicationFiled: May 22, 2014Publication date: April 20, 2017Applicant: Mitsubishi Electric CorporationInventors: Hideo TERASAWA, Kenichi NAKAGAWA
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Patent number: 9541162Abstract: There is provided a reduction gear unit including: a pinion; a bearing that is located on each of both sides of the pinion; a large gear that meshes with the pinion; a gear case that stores therein lubricant oil, and accommodates the pinion and the gear; and pinion bearing caps each of which includes an annular portion, wherein the annular portion extends from outside of the gear case toward inside thereof and parallel to a pinion shaft, and includes an end portion in which an end surface in an extending-direction is provided on a side of the pinion with respect to an extended line of a gear-side end surface of an inner race of the bearing, and an inner peripheral surface of the end portion is formed so that a diameter is decreased from a gear-side end surface of an outer race toward the end surface.Type: GrantFiled: June 24, 2011Date of Patent: January 10, 2017Assignee: MITSUBISHI ELECTRIC CORPORATIONInventor: Hideo Terasawa
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Publication number: 20160146701Abstract: An end play measurement apparatus is provided that measures end play of a tapered roller bearing of a gear unit. The gear unit supports a large-gear shaft, with which a gear is fitted, via the tapered roller bearing. The end play measurement apparatus includes a power generation unit, which is fixed to the large-gear shaft and generates power to move the gear unit backward and forward in the axial direction, a position change unit, which is interposed between the power generation unit and the gear unit and changes the axial position of the gear unit by using the power of the power generation unit, and a booster mechanism, which has a free end that receives the power of the power generation unit to boost the power.Type: ApplicationFiled: June 13, 2013Publication date: May 26, 2016Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Michinori HASHIMOTO, Shinsaku MAEDA, Hideo TERASAWA