Patents by Inventor Hideyuki NEZU
Hideyuki NEZU 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: 11408488Abstract: The present invention relates to a two-stage transmission for an electrically driven vehicle including a dog clutch and a friction clutch, and an object of the present invention is to prevent a torque drop when shifting gears. The two-stage transmission for the electrically driven vehicle includes a planetary gear mechanism (12), a dog clutch (28), a friction clutch (30), an armature (26) to switch between the dog clutch (28) and the friction clutch (30), and an electromagnetic coil (31) to drive the armature (26). In the dog clutch (28) and the friction clutch (30), the coupling relationship among the rotational elements of the planetary gear mechanism (12) is set such that the dog clutch (28) is fastened and the friction clutch (30) is not fastened in speed reduction (the first speed), and the dog clutch (28) is not fastened and the friction clutch (30) is fastened in speed increase (the second speed).Type: GrantFiled: June 26, 2020Date of Patent: August 9, 2022Assignee: UNIPRES CORPORATIONInventors: Ryo Shirosaki, Ryosuke Suzuki, Hideyuki Nezu, Yuta Oono, Kentaro Furukawa
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Patent number: 11396913Abstract: The present invention relates to a two-speed transmission for an electric driving vehicle and the two-speed transmission for an electric vehicle has only one actuator. The transmission comprises a planetary gear mechanism (12), an elastic body (44), an armature (26) to integrally rotate with an input axis, an electromagnetic coil (46) and a multi-plate friction clutch (30). A ring gear (20) is fixed to a housing. The armature (26) comprises clutch projection portions (26-1). A dog clutch is constituted by the clutch projection portions (26-1) and recess portions (18-2) of a sun gear (18). When the electromagnetic coil (46) is not electrically energized, the dog clutch is engaged. The rotation of the input axis is reduced and is transmitted to an output axis via the sun gear (18) and a carrier (16).Type: GrantFiled: November 30, 2018Date of Patent: July 26, 2022Assignee: UNIPRES CORPORATIONInventors: Ryo Shirosaki, Ryosuke Suzuki, Hideyuki Nezu, Takashi Matsuura, Yuuta Oono, Atsushi Kobayashi, Yutaka Murata, Yoichi Furuichi
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Patent number: 11326653Abstract: A clutch hub which is engaged with the clutch plates in an outer circumference is a press-molding article made from one steel sheet. In its inner circumferential surface, plural oil grooves for cooling the clutch plates, which are extended to a shaft direction and have a space in a circumferential direction. Each of dams as a press-molding portion extending to radial inward is formed at an end portion of each of the oil groove. The dams include an upright front surface and a back surface, and the bottom surfaces and both side surfaces of the oil grooves are integrated with the dams at the front surface side and the back surface side.Type: GrantFiled: August 10, 2018Date of Patent: May 10, 2022Assignee: UNIPRES CORPORATIONInventors: Daichi Watanabe, Masamichi Miwa, Ryosuke Suzuki, Hideyuki Nezu
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Publication number: 20220128129Abstract: The present invention relates to a two-stage transmission for an electrically driven vehicle including a dog clutch and a friction clutch, and an object of the present invention is to prevent a torque drop when shifting gears. The two-stage transmission for the electrically driven vehicle includes a planetary gear mechanism (12), a dog clutch (28), a friction clutch (30), an armature (26) to switch between the dog clutch (28) and the friction clutch (30), and an electromagnetic coil (31) to drive the armature (26). In the dog clutch (28) and the friction clutch (30), the coupling relationship among the rotational elements of the planetary gear mechanism (12) is set such that the dog clutch (28) is fastened and the friction clutch (30) is not fastened in speed reduction (the first speed), and the dog clutch (28) is not fastened and the friction clutch (30) is fastened in speed increase (the second speed).Type: ApplicationFiled: June 26, 2020Publication date: April 28, 2022Applicant: UNIPRES CORPORATIONInventors: Ryo SHIROSAKI, Ryosuke SUZUKI, Hideyuki NEZU, Yuta OONO, Kentaro FURUKAWA
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Publication number: 20210071721Abstract: The present invention relates to a two-speed transmission for an electric driving vehicle and the two-speed transmission for an electric vehicle has only one actuator. The transmission comprises a planetary gear mechanism (12), an elastic body (44), an armature (26) to integrally rotate with an input axis, an electromagnetic coil (46) and a multi-plate friction clutch (30). A ring gear (20) is fixed to a housing. The armature (26) comprises clutch projection portions (26-1). A dog clutch is constituted by the clutch projection portions (26-1) and recess portions (18-2) of a sun gear (18). When the electromagnetic coil (46) is not electrically energized, the dog clutch is engaged. The rotation of the input axis is reduced and is transmitted to an output axis via the sun gear (18) and a carrier (16).Type: ApplicationFiled: November 30, 2018Publication date: March 11, 2021Applicant: UNIPRES CORPORATIONInventors: Ryo SHIROSAKI, Ryosuke SUZUKI, Hideyuki NEZU, Takashi MATSUURA, Yuuta OONO, Atsushi KOBAYASHI, Yutaka MURATA, Yoichi FURUICHI
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Patent number: 10927900Abstract: A wet-type multi plate clutch is configured to be used for a transmission in an automobile. A clutch pack is provided with a plurality of drive plates and a plurality of driven plates. The drive plates have single surfaces on which first clutch facings are fixed and opposed surfaces on which annular grooves are formed along entire peripheral lengths. The driven plates have single surfaces on which second clutch facings are fixed and opposed surfaces on which annular grooves are formed along entire peripheral lengths. The sliding surfaces of the drive plates and the driven plates are arranged between the first and second clutch facings, which are axially adjacent with each other.Type: GrantFiled: August 2, 2018Date of Patent: February 23, 2021Assignee: UNIPRES CORPORATIONInventors: Ryosuke Suzuki, Hideyuki Nezu, Takashi Matsuura
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Patent number: 10927901Abstract: A wet-type multi plate clutch having a obtaining hydraulic chamber, which is capable of increasing a fuel consumption efficiency by reducing a load of an oil pump for clutch oil for engaging the clutch and which realizes a simplified structure by eliminating a necessity of a canceller chamber. A disk spring 46 is, at its outer peripheral part, is supported by a clutch drum 10 and contacts, at its inner peripheral part, with a spring presser part 12-1 of the piston 12. The disk spring 46 faces, at the side opposite the piston 12, with clutch pack 20. A forward movement of the piston 12 by operating pressure in a hydraulic chamber is transmitted to the clutch pack 20 via the disk spring 46, resulting in an engaged condition of the clutch pack 20. A driving force of the piston 12 by the hydraulic oil pressure is boosted under a lever ratio a/b of the disk spring 46 and is transmitted to the clutch pack 20.Type: GrantFiled: January 4, 2019Date of Patent: February 23, 2021Assignee: UNIPRES CORPORATIONInventors: Hideyuki Nezu, Ryosuke Suzuki, Kazuhiro Ohta
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Publication number: 20200246857Abstract: An object of the present invention is to extend a retention time of clutch oil and enable to efficiently cool clutch plates. A clutch hub (42) which is engaged with the clutch plates in an outer circumference is a press-molding article made from one steel sheet. In its inner circumferential surface, plural oil grooves (74-4) for cooling the clutch plates, which are extended to a shat direction and have a space in a circumferential direction. Each of dams (76) as a press-molding portion extending to radial inward is formed at an end portion of each of the oil groove (74-4). The press-molding of the dams (76) is performed by pressing a front surface side of the clutch hub (42) by punches (82) and disposing inner pressing tools (84) at a back surface side. The dams (76) comprise an upright front surface (76-1) and a back surface (76-2), which are a molding surface molded by using the molding tools.Type: ApplicationFiled: August 10, 2018Publication date: August 6, 2020Applicant: UNIPRES CORPORATIONInventors: Daichi WATANABE, Masamichi MIWA, Ryosuke SUZUKI, Hideyuki NEZU
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Publication number: 20190136915Abstract: A wet-type multi plate clutch having a obtaining hydraulic chamber, which is capable of increasing a fuel consumption efficiency by reducing a load of an oil pump for clutch oil for engaging the clutch and which realizes a simplified structure by eliminating a necessity of a canceller chamber. A disk spring 46 is, at its outer peripheral part, is supported by a clutch drum 10 and contacts, at its inner peripheral part, with a spring presser part 12-1 of the piston 12. The disk spring 46 faces, at the side opposite the piston 12, with clutch pack 20. A forward movement of the piston 12 by operating pressure in a hydraulic chamber is transmitted to the clutch pack 20 via the disk spring 46, resulting in an engaged condition of the clutch pack 20. A driving force of the piston 12 by the hydraulic oil pressure is boosted under a lever ratio a/b of the disk spring 46 and is transmitted to the clutch pack 20.Type: ApplicationFiled: January 4, 2019Publication date: May 9, 2019Applicant: UNIPRES CORPORATIONInventors: Hideyuki NEZU, Ryosuke SUZUKI, Kazuhiro OHTA
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Publication number: 20180340577Abstract: A wet-type multi plate clutch capable of being used for a transmission in an automobile. A clutch pack 50 is provided with a plurality of drive plate 52 and a plurality of driven plates 54. The drive plates 52 have single surfaces on which clutch facings 55 are fixed and opposed surfaces on which annular grooves 58 along entire peripheral lengths are formed. The driven plates 54 have single surfaces on which clutch facings 56 are fixed and opposed surfaces on which annular grooves 59 along entire peripheral lengths are formed. The sliding surfaces of the drive plates 52 and the driven plates 54 are arranged between the clutch facings 55 and 56, which are axially adjacent with each other.Type: ApplicationFiled: August 2, 2018Publication date: November 29, 2018Applicant: UNIPRES CORPORATIONInventors: Ryosuke SUZUKI, Hideyuki NEZU, Takashi MATSUURA