Patents by Inventor Yoshiharu Naito
Yoshiharu Naito 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: 11368068Abstract: The present invention provides a bearing pressure plate and a dynamo-electric machine using the bearing pressure plate which are capable of avoiding breakage of a bolt by dispersing a stress when a load due to vibrations etc. is applied. A bearing pressure plate 5 has an annular inner ring portion 11 abutting against an outer ring 3Ba of a rolling bearing 3 that supports a rotation shaft 4, an annular outer ring portion 12 located at a radial direction outer side of the inner ring portion 11 and having a plurality of bolt holes 12b through which the outer ring portion 12 is secured to a fixing portion side with a plurality of bolts 12a, and bridge portions 13 integrally connecting the inner ring portion 11 and the outer ring portion 12 at positions except the bolt holes 12b in a circumferential direction.Type: GrantFiled: October 8, 2019Date of Patent: June 21, 2022Assignee: MEIDENSHA CORPORATIONInventors: Akihumi Shimizu, Koji Nagata, Takashi Abe, Yoshiharu Naito
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Publication number: 20220085684Abstract: The present invention provides a bearing pressure plate and a dynamo-electric machine using the bearing pressure plate which are capable of avoiding breakage of a bolt by dispersing a stress when a load due to vibrations etc. is applied. A bearing pressure plate 5 has an annular inner ring portion 11 abutting against an outer ring 3Ba of a rolling bearing 3 that supports a rotation shaft 4, an annular outer ring portion 12 located at a radial direction outer side of the inner ring portion 11 and having a plurality of bolt holes 12b through which the outer ring portion 12 is secured to a fixing portion side with a plurality of bolts 12a, and bridge portions 13 integrally connecting the inner ring portion 11 and the outer ring portion 12 at positions except the bolt holes 12b in a circumferential direction.Type: ApplicationFiled: October 8, 2019Publication date: March 17, 2022Applicant: MEIDENSHA CORPORATIONInventors: Akihumi SHIMIZU, Koji NAGATA, Takashi ABE, Yoshiharu NAITO
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Patent number: 10770933Abstract: A stator fixing structure is configured such that a projection (2) is provided to project from the outer periphery of a stator (1), which is formed by stacking a plurality of plate-shaped members, in a radial direction while a fastening member (11) is inserted into a fastening member inserting hole (3) formed in the projection (2) so as to fix the stator (1) to a frame (8), and the outer peripheral surface of the stator (1) except the projection (2) is fixed to the inner peripheral surface of the frame (8) by shrink fitting. A dent (4) is formed at the root of the projection (2), thereby reducing the proportion of the projection (2) in the periphery of the stator and increasing the contact area between the frame (8) and the stator (1) for the shrink fit part (7). Thus, the stator (1) can be effectively fastened to the frame (8).Type: GrantFiled: September 18, 2013Date of Patent: September 8, 2020Assignee: MEIDENSHA CORPORATIONInventors: Yoshiharu Naito, Koji Nagata, Takashi Abe
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Patent number: 9444295Abstract: In this rotor (101), which has permanent magnets (105) inserted in a rotor core (102), main body sections (117) of magnetic shield sections (107) are formed in contact with the q-axis-side end faces (105q) of each permanent magnet (105). In addition, an extension section (127) for each magnetic shield section (107) is formed positioned more toward the outer periphery than the outer-periphery-side pole face (105ou) of the permanent magnet (105) and between the d-axis and the q-axis at an end face of the rotor core (102). Each extension section (127) is configured so as to gradually approach the outer periphery of the rotor core (102) while extending from the outer-periphery-side end of the main body section (117) from the q-axis to the d-axis side, and then gradually move away from the outer periphery of the rotor core (102) while extending from the q-axis side to the d-axis side.Type: GrantFiled: September 9, 2013Date of Patent: September 13, 2016Assignee: MEIDENSHA CORPORATIONInventors: Takeshi Suwazono, Yoshiharu Naito, Sho Uchiyama
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Patent number: 9225211Abstract: A rotor structure for a rotary machine in which a rotor (10) is securely fastened to the outer periphery of a shaft (20) and a positioning key is formed on the inner wall of the rotor (10), while a key (11) is formed on the outer periphery of the shaft (20), wherein curved sections (R) are formed on the side surfaces on both sides of the positioning key (11), thereby reducing stress at the angled sections of the rotor core to a greater extent than positioning keys of the prior art. At the same time, torque can be transmitted over the entire surface of an interference section of the shaft (20) thereby enabling torque to be reliably transmitted, and a magnetic path of a magnetic protrusion (d-axis) to be ensured. A motor can thus be reduced in size.Type: GrantFiled: October 17, 2011Date of Patent: December 29, 2015Assignee: MEIDENSHA CORPORATIONInventors: Yoshiharu Naito, Koji Nagata
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Publication number: 20150249368Abstract: A stator fixing structure is configured such that a projection (2) is provided to project from the outer periphery of a stator (1), which is formed by stacking a plurality of plate-shaped members, in a radial direction while a fastening member (11) is inserted into a fastening member inserting hole (3) formed in the projection (2) so as to fix the stator (1) to a frame (8), and the outer peripheral surface of the stator (1) except the projection (2) is fixed to the inner peripheral surface of the frame (8) by shrink fitting. A dent (4) is formed at the root of the projection (2), thereby reducing the proportion of the projection (2) in the periphery of the stator and increasing the contact area between the frame (8) and the stator (1) for the shrink fit part (7). Thus, the stator (1) can be effectively fastened to the frame (8).Type: ApplicationFiled: September 18, 2013Publication date: September 3, 2015Applicant: MEIDENSHA CORPORATIONInventors: Yoshiharu Naito, Koji Nagata, Takashi Abe
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Publication number: 20150236556Abstract: In this rotor (101), which has permanent magnets (105) inserted in a rotor core (102), main body sections (117) of magnetic shield sections (107) are formed in contact with the q-axis-side end faces (105q) of each permanent magnet (105). In addition, an extension section (127) for each magnetic shield section (107) is formed positioned more toward the outer periphery than the outer-periphery-side pole face (105ou) of the permanent magnet (105) and between the d-axis and the q-axis at an end face of the rotor core (102). Each extension section (127) is configured so as to gradually approach the outer periphery of the rotor core (102) while extending from the outer-periphery-side end of the main body section (117) from the q-axis to the d-axis side, and then gradually move away from the outer periphery of the rotor core (102) while extending from the q-axis side to the d-axis side.Type: ApplicationFiled: September 9, 2013Publication date: August 20, 2015Applicant: Meeidensha CorporationInventors: Takeshi Suwazono, Yoshiharu Naito, Sho Uchiyama
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Publication number: 20130293057Abstract: A rotor structure for a rotary machine in which a rotor (10) is securely fastened to the outer periphery of a shaft (20) and a positioning key is formed on the inner wall of the rotor (10), while a key (11) is formed on the outer periphery of the shaft (20), wherein curved sections (R) are formed on the side surfaces on both sides of the positioning key (11), thereby reducing stress at the angled sections of the rotor core to a greater extent than positioning keys of the prior art. At the same time, torque can be transmitted over the entire surface of an interference section of the shaft (20) thereby enabling torque to be reliably transmitted, and a magnetic path of a magnetic protrusion (d-axis) to be ensured. A motor can thus be reduced in size.Type: ApplicationFiled: October 17, 2011Publication date: November 7, 2013Inventors: Yoshiharu Naito, Koji Nagata
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Patent number: D942510Type: GrantFiled: March 16, 2020Date of Patent: February 1, 2022Assignee: MEIDENSHA CORPORATIONInventors: Yoshiharu Naito, Takahiko Oishi, Yohei Takahashi
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Patent number: D951300Type: GrantFiled: March 16, 2020Date of Patent: May 10, 2022Assignee: MEIDENSHA CORPORATIONInventors: Yoshiharu Naito, Takahiko Oishi, Yohei Takahashi