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公开(公告)号：US12151358B2
公开(公告)日：2024-11-26
申请号：US18184159
申请日：2023-03-15
Applicant: MAKITA CORPORATION
Inventor： Yoshihiro Ito , Tomohiko Imae , Jun Ueda
Abstract: A power tool including a rear cover simplifies assembly. A driver drill includes a motor including a stator and a rotor rotatable relative to the stator, a motor housing accommodating the motor, being cylindrical, and including a left housing and a right housing being laterally separable, a grip connected to a lower portion of the motor housing, an output unit in front of the motor and driven by the motor, and a rear cover supporting a rear portion of the rotor and closing a rear portion of the motor housing. The rear cover is held and fastened between the left housing and the right housing.
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公开(公告)号：US11628553B2
公开(公告)日：2023-04-18
申请号：US17190115
申请日：2021-03-02
Applicant: MAKITA CORPORATION
Inventor： Yoshihiro Ito , Tomohiko Imae , Jun Ueda
Abstract: A power tool including a rear cover simplifies assembly. A driver drill includes a motor including a stator and a rotor rotatable relative to the stator, a motor housing accommodating the motor, being cylindrical, and including a left housing and a right housing being laterally separable, a grip connected to a lower portion of the motor housing, an output unit in front of the motor and driven by the motor, and a rear cover supporting a rear portion of the rotor and closing a rear portion of the motor housing. The rear cover is held and fastened between the left housing and the right housing.
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Patent Agency Ranking
公开(公告)号：US11260515B2
公开(公告)日：2022-03-01
申请号：US16655556
申请日：2019-10-17
Applicant: MAKITA CORPORATION
Inventor： Yoshihiro Ito
Abstract: A rotary power tool, such as an oil pulse driver, includes: a motor, a pinion rotated by the motor, planet gears that mesh with the pinion, an internal gear that meshes with the planet gears and a shaft that is rotationally driven by the planet gears and disposed frontward of the planet gears. The internal gear comprises an internal gear part and an internal gear retaining part for holding the internal gear part. An oil unit bearing is disposed frontward of the internal gear part, and the oil unit bearing is held at a front part of the internal gear retaining part.
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公开(公告)号：US10427282B2
公开(公告)日：2019-10-01
申请号：US15236718
申请日：2016-08-15
Applicant: MAKITA CORPORATION
Inventor： Goshi Ishikawa , Yoshihiro Ito , Toshihisa Takada
IPC: B25B23/147 , B25B21/02
Abstract: In a rotary impact tool according to an aspect of the present disclosure, an impact mechanism rotates an output shaft by a rotational force of a motor and, when a torque equal to or greater than a given value is externally applied to the output shaft in a direction opposite a rotational direction of the output shaft, the impact mechanism intermittently applies an impact force as a momentary torque to the output shaft in the rotational direction of the output shaft. A protection unit stops the motor or reduces a rotational speed of the motor on condition that an abnormal impact detection unit detects the abnormal impact. A control unit controls activation of the protection unit differently when the rotational direction of the motor is set to a reverse rotational direction in comparison with when the rotational direction of the motor is set to a forward rotational direction.
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公开(公告)号：US12208499B2
公开(公告)日：2025-01-28
申请号：US17648224
申请日：2022-01-18
Applicant: MAKITA CORPORATION
Inventor： Yoshihiro Ito
Abstract: An impact power tool includes a front housing connected to a rear housing. A motor is disposed at least partially in the rear housing. An impulse case is disposed at least partially in the front housing. The impulse case is operably coupled to the motor to receive torque therefrom and be rotated thereby. A first protrusion is provided on an interior surface of the impulse case. A first blade is provided inside the impulse unit and is configured to be impacted by the first protrusion. An output shaft is partially disposed within the impulse unit and partially projects out of the impulse unit. The output shaft is configured to be rotated in response to the first protrusion impacting the first blade.
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公开(公告)号：US12090619B2
公开(公告)日：2024-09-17
申请号：US17514691
申请日：2021-10-29
Applicant: MAKITA CORPORATION
Inventor： Takaharu Nakatsuka , Yoshihiro Ito
CPC classification number: B25F5/001 , H02K5/1732 , H02K7/083 , H02K7/116 , H02K7/145 , H02K11/24 , H02K21/16 , B25B23/147
Abstract: A torque sensor is less likely to lower detection accuracy. A screwing machine includes a motor including a stator and a rotor rotatable about a rotation axis, a gear case, a planetary gear, an internal gear connected to the planetary gear, a torque sensor including a front plate coupled to the internal gear, a rear plate supported by the gear case, a hollow portion located between the front plate and the rear plate, and a strain gauge fixed to the hollow portion, a bearing located between the stator and the rear plate and supporting at least a part of the rotor, and a bearing box surrounding the bearing and supporting the bearing.
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公开(公告)号：US09878435B2
公开(公告)日：2018-01-30
申请号：US14295738
申请日：2014-06-04
Applicant: MAKITA CORPORATION
Inventor： Yoshihiro Ito
Abstract: A rotary power tool, such as an oil pulse driver, includes: a motor, a pinion rotated by the motor, planet gears that mesh with the pinion, an internal gear that meshes with the planet gears and a shaft that is rotationally driven by the planet gears and disposed frontward of the planet gears. The internal gear comprises an internal gear part and an internal gear retaining part for holding the internal gear part. An oil unit bearing is disposed frontward of the internal gear part, and the oil unit bearing is held at a front part of the internal gear retaining part.
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