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公开(公告)号：US20250035192A1
公开(公告)日：2025-01-30
申请号：US18605860
申请日：2024-03-15
Applicant: MITSUBA Corporation
Inventor： MOTOAKI KOBAYASHI , TEPPEI TOKIZAKI , TOHRU YUMOTO , NOBUYUKI NAGAI
Abstract: A fifth ball bearing that rotatably supports a rotating shaft is provided on one side of a pinion gear in an axial direction of the rotating shaft. A sixth ball bearing that rotatably supports the rotating shaft is provided on the other side of the pinion gear in the axial direction of the rotating shaft. A carrier is provided with a bearing fixing portion that supports the fifth ball bearing immovably in the axial direction of the rotating shaft, and a bearing guide portion that supports the sixth ball bearing movably in the axial direction of the rotating shaft. The fifth and sixth ball bearings are provided so as not to be close to each other in the axial direction of the rotating shaft, and a female screw portion has a rattling adjustment member that presses the sixth ball bearing toward the side where the fifth ball bearing is provided.
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Patent Agency Ranking
公开(公告)号：US20240072605A1
公开(公告)日：2024-02-29
申请号：US18334359
申请日：2023-06-13
Applicant: MITSUBA Corporation
Inventor： TEPPEI TOKIZAKI , Motoaki Kobayashi , Satoshi Tamura , Masaki Hayata , Masakazu Saito , Yoshichika Kawashima
Abstract: A brushless motor includes a motor part and a gear part. The motor part includes: a rotating shaft, having a first gear; a rotor, having a bottom wall and a side wall, the bottom wall being fixed to the rotating shaft; magnets, fixed to the side wall and arranged side by side in a circumferential direction of the rotor; a stator, provided between the rotating shaft and the magnets in a radial direction of the rotor and wound with a coil; and a motor housing, rotatably supporting the rotating shaft, and accommodating the rotor and the stator. The gear part includes: a second gear, meshed with the first gear; an output shaft, having an output part, having a base end side thereof fixed to the second gear, and parallel to the rotating shaft; and a gear housing, rotatably supporting the output shaft, and accommodating the second gear.
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公开(公告)号：US20240063689A1
公开(公告)日：2024-02-22
申请号：US18501019
申请日：2023-11-02
Applicant: MITSUBA Corporation
Inventor： NAOKI KOJIMA , MOTOAKI KOBAYASHI , TEPPEI TOKIZAKI , Yoshichika KAWASHIMA
Abstract: A deceleration mechanism is provided with first and second gears, a first tooth part arranged in the first gear and extending spirally in an axial direction of the first gear, an engagement projected part arranged on the first tooth part, second tooth parts arranged on the second gear, and an engagement recessed part arranged between the adjacent second tooth parts. The engagement projected part is formed in an arc shape in a direction orthogonal to the axial direction of the first gear and has a curvature center eccentric from a rotation center of the first gear. The second tooth parts are inclined with respect to the axial direction of the first gear and arranged in a circumferential direction of the second gear. The engagement projected part is formed in an arc-shape in a direction orthogonal to the axial direction of the first gear and engaged with the engagement projected part.
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公开(公告)号：US20240003408A1
公开(公告)日：2024-01-04
申请号：US18037564
申请日：2022-03-31
Applicant: MITSUBA Corporation
Inventor： MOTOAKI KOBAYASHI , TEPPEI TOKIZAKI
IPC: F16H1/08
CPC classification number: F16H1/08
Abstract: When viewed in the axial direction of a pinion gear (31), the center (C1) of a pinion main body (31b) and the center (C2) of a helical tooth (31c) are offset from each other, the helical tooth (31c) has a larger diameter than the pinion main body (31b), and the pinion main body (31b) partially protrudes outside an imaginary circle (VC) that forms the outer shape of the helical tooth (31c). A cross-sectional shape of the pinion gear (31) can be made non-circular with the pinion main body (31b) partially protruding outside the imaginary circle (VC) that forms the outer shape of the helical tooth (31c).
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公开(公告)号：US20230258248A1
公开(公告)日：2023-08-17
申请号：US18074531
申请日：2022-12-05
Applicant: MITSUBA Corporation
Inventor： TEPPEI TOKIZAKI , MOTOAKI KOBAYASHI , KUMIKO MASUBUCHI , TSUBASA ISHIZEKI , Yoshichika Kawashima
IPC: F16H19/08 , F16H57/04 , F16H57/021
CPC classification number: F16H19/08 , F16H57/0464 , F16H57/021 , F16H57/032
Abstract: The disclosure provides a motor with a deceleration mechanism capable of suppressing disengagement of gears even when a large external force is applied to an output shaft. A backup member 70 maintaining engagement between a pinion gear 61 and a helical gear 62 is provided on a side of the pinion gear 61 opposite to the side of the helical gear 62 in a gear case 20. Thus, even when a large external force is applied to the output shaft, disengagement of the gears (disengagement of the pinion gear 61 and the helical gear 62) can be suppressed. Therefore, damage to the pinion gear 61 and the helical gear 62 (deceleration mechanism 60) can be prevented for a long period of time, and consequently the life of the motor 10 with the deceleration mechanism can be extended.
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公开(公告)号：US20220316558A1
公开(公告)日：2022-10-06
申请号：US17607897
申请日：2020-06-26
Applicant: MITSUBA Corporation
Inventor： TEPPEI TOKIZAKI , NAOKI KOJIMA , MOTOAKI KOBAYASHI , SHUNJI KUMAGAI
Abstract: A speed reduction mechanism and a motor equipped with the speed reduction mechanism are provided. A pinion gear is provided with one spiral engagement projected part, and a helical gear is provided with a plurality of engagement recessed parts with which the engagement projected part is engaged. The engagement projected part and the engagement recessed part are formed so that their cross-sectional shapes along a direction orthogonal to an axial direction of the pinion gear are in arc shapes. A shape of helical teeth and a shape of the engagement recessed part are determined based on a shape of the engagement projected part provided on a spiral tooth.
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