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公开(公告)号：US11204081B2
公开(公告)日：2021-12-21
申请号：US16967276
申请日：2019-02-26
Applicant: NTN Corporation
Inventor： Yoshinori Ikeda , Tatsunori Shimizu , Shinsuke Hirano
Abstract: A screw shaft 22 constitutes a feed screw mechanism provided in an electric actuator. In the screw shaft 22 on which a mounting surface 22c for mounting a sensor target is formed, a portion where the mounting surface 22c is formed has a non-circular, line-symmetric cross section.
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公开(公告)号：US10731739B2
公开(公告)日：2020-08-04
申请号：US16083598
申请日：2017-03-16
Applicant: NTN CORPORATION
Inventor： Takushi Matsuto , Yoshinori Ikeda , Yuuki Naitou
IPC: H02K7/06 , H02K7/116 , H02K7/08 , F16H25/22 , F16H57/02 , F16C19/36 , F16C33/34 , F16C19/16 , F16H25/20 , F16C33/64 , H02K5/22
Abstract: Provided is an electric actuator (1), including: a motor part (A); and a motion conversion mechanism part (B) configured to convert a rotary motion of the motor part (A) into a linear motion to output the linear motion. The motion conversion mechanism part (B) includes: a screw shaft (33) arranged coaxially with a rotation center of a rotor (24) of the motor part (A); and a nut member (32) rotatably fitted to an outer periphery of the screw shaft. The rotor (24) includes a rotor inner (26) serving as a hollow rotary shaft having the nut member (32) arranged on an inner periphery thereof. A rotary motion of the rotor (24) is transmitted to the nut member (32) through an intermediate member (Z) arranged between an inner peripheral surface of the rotor inner (26) and an outer peripheral surface (32b) of the nut member (32).
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公开(公告)号：USD832325S1
公开(公告)日：2018-10-30
申请号：US29572895
申请日：2016-08-01
Applicant: NTN CORPORATION
Designer： Takushi Matsuto , Yoshinori Ikeda , Yuuki Naitou
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公开(公告)号：US09353838B2
公开(公告)日：2016-05-31
申请号：US14273690
申请日：2014-05-09
Applicant: NTN Corporation
Inventor： Yoshinori Ikeda
CPC classification number: F16H25/2204 , F16C17/02 , F16C19/46 , F16C33/128 , F16C33/20 , F16C2208/04 , F16C2208/40 , F16C2208/60 , F16C2223/12 , F16C2223/18 , F16H25/20 , F16H2025/2031 , F16H2025/2081 , Y10T74/18576 , Y10T74/18744
Abstract: An electric linear actuator has a housing, an electric motor, a speed reduction mechanism, and a ball screw mechanism. The ball screw mechanism has a nut and a screw shaft. The nut is rotationally supported by bearings on the housing but is axially immovable. The screw shaft is rotationally supported on the nut and is axially movable with respect to the housing. The housing has a first housing and a second housing abutting against one another. Bores contain the screw shaft in the housing. The speed reduction mechanism has an input gear, an intermediate gear, and an output gear, secured on the nut, mating with the intermediate gear. The intermediate gear is rotationally supported, via a bearing, on a shaft. The shaft is supported at its opposite ends on the first and second housings.
Abstract translation: 电动线性致动器具有壳体，电动马达，减速机构和滚珠丝杠机构。 滚珠丝杠机构具有螺母和螺杆轴。 螺母由壳体上的轴承旋转支撑，但是轴向不可移动。 螺杆轴被旋转地支撑在螺母上并且可相对于壳体轴向移动。 壳体具有彼此邻接的第一壳体和第二壳体。 孔内装有螺钉轴。 减速机构具有固定在螺母上的与中间齿轮配合的输入齿轮，中间齿轮和输出齿轮。 中间齿轮通过轴承旋转地支撑在轴上。 轴在第一和第二壳体的相对端处被支撑。
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公开(公告)号：US10830320B2
公开(公告)日：2020-11-10
申请号：US16071934
申请日：2016-12-27
Applicant: NTN CORPORATION
Inventor： Takushi Matsuto , Yoshinori Ikeda , Yuuki Naitou
IPC: F16H25/22 , H02K7/06 , H02K7/116 , F16H25/20 , F16H57/021 , F16D121/24 , F16D125/40
Abstract: Provided is an electric actuator, including: a motor part; a motion conversion mechanism part; an operation part; and a terminal part, wherein a hollow rotary shaft configured to support a rotor core of the motor part is supported by a rolling bearing so as to be rotatable, wherein the motion conversion mechanism part is coupled to the hollow rotary shaft, and includes a ball screw, wherein a ball screw nut of the ball screw is arranged inside the hollow rotary shaft, wherein the operation part is coupled to the motion conversion mechanism part, and wherein an inner raceway surface of the rolling bearing is formed on the hollow rotary shaft.
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Patent Agency Ranking
公开(公告)号：US11791695B2
公开(公告)日：2023-10-17
申请号：US16972730
申请日：2019-06-24
Applicant: NTN Corporation
Inventor： Shinsuke Hirano , Yoshinori Ikeda , Tatsunori Shimizu
CPC classification number: H02K11/0141 , F16H57/02 , G01D5/145 , H02K7/06 , H02K11/215 , F16H25/2204 , F16H2025/2031 , F16H2025/2081 , F16H2057/02034 , F16H2057/02082
Abstract: An electric actuator 1 includes a motor 5 and a motion conversion mechanism 4 that converts a rotary motion generated by driving the motor 5 into a predetermined motion. A magnet 31 as a sensor target is disposed on a movable part performing a predetermined motion, and magnetic sensors 32 detecting position information of the magnet 31 is disposed around the magnet 31. A magnetic shield plate 34 is disposed between the motor 5 and the magnetic sensors 32, and an outer surface 5e of the motor 5 and an inner surface 34a of the magnetic shield plate 34 face each other with a predetermined gap 35 therebetween.
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公开(公告)号：US11428300B2
公开(公告)日：2022-08-30
申请号：US16973590
申请日：2019-06-25
Applicant: NTN Corporation
Inventor： Shinsuke Hirano , Yoshinori Ikeda , Tatsunori Shimizu
Abstract: An electric actuator includes an electric motor 5, and a motion conversion mechanism 4 configured to convert a rotary motion of the electric motor 5 into a linear motion, in which the motion conversion mechanism 4 has a nut 17 rotatably supported, and a screw shaft 18 configured to axially move in accordance with a rotation of the nut 17, the electric actuator is provided with a case 20 covering an axial end surface 18b of the screw shaft 18, and the electric actuator is provided with an elastic member 30 between the axial end surface 18b of the screw shaft 18 and an opposite surface 20b of the case 20 facing the axial end surface 18b of the screw shaft 18.
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公开(公告)号：US11177718B2
公开(公告)日：2021-11-16
申请号：US16083592
申请日：2017-03-10
Applicant: NTN CORPORATION
Inventor： Takushi Matsuto , Yoshinori Ikeda , Yuuki Naitou
Abstract: An electric actuator (1) includes: a motor part (A); a motion conversion mechanism part (B); and a housing (2) configured to house the motor part (A) and the motion conversion mechanism part (B). The motion conversion mechanism part (B) includes: a screw shaft (33); and a nut member (32) rotatably fitted to an outer periphery of the screw shaft. The screw shaft (33) performs a linear motion in an axial direction along with a rotation of the nut member (32). The housing (2) includes a plurality of members coupled to one another in the axial direction. A terminal part (D) (terminal main body (50)) configured to hold a power supply circuit configured to supply drive power to the motor part (A) includes a tubular portion (50A) sandwiched by the members forming the housing (2) from both sides in the axial direction.
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公开(公告)号：US11162565B2
公开(公告)日：2021-11-02
申请号：US16084031
申请日：2017-03-24
Applicant: NTN CORPORATION
Inventor： Takushi Matsuto , Shinsuke Hirano , Atsushi Ikeda , Tomomi Ishikawa , Yoshinori Ikeda
Abstract: Provided is an electric actuator, including: a drive part (2); a motion conversion mechanism part (3) configured to convert a rotary motion from the drive part (2) into a linear motion in an axial direction in parallel to an output shaft of the drive part (2); and a lock mechanism part (7) configured to prevent drive by the motion conversion mechanism part (3). The lock mechanism part (7) includes: a rotary motor (64); and a lock member (60), which is driven by the rotary motor (64) so as to be brought into at least any one of a locking state of preventing the drive by the motion conversion mechanism part (3) and an unlocking state of releasing the locking state.
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公开(公告)号：US09574648B2
公开(公告)日：2017-02-21
申请号：US14461367
申请日：2014-08-16
Applicant: NTN Corporation
Inventor： Yoshinori Ikeda , Kensuke Funada
CPC classification number: F16H25/2204 , F16B21/183 , F16H25/2214 , F16H25/24 , F16H2025/2081 , H02K7/06 , Y10T74/18576
Abstract: An electric linear actuator has a cylindrical housing, an electric motor, a speed reduction mechanism, and a ball screw mechanism. The ball screw mechanism has a nut and a screw shaft coaxially integrated with the drive shaft. The housing has receiving bores to receive the screw shaft. A cylindrical sleeve is securely press-fit into the receiving bore of the housing. The sleeve has one pair of axially extending recessed grooves formed on its inner circumference at diametrically opposed positions. A guide pin, mounted on the end of the screw shaft, engages the recessed grooves. An annular groove is formed near an opening of the receiving bore of the housing. The sleeve is held in the receiving bore by a stopper ring snapped into the annular groove.
Abstract translation: 电动线性致动器具有圆柱形壳体，电动马达，减速机构和滚珠丝杠机构。 滚珠丝杠机构具有与驱动轴同轴一体的螺母和螺杆轴。 壳体具有接收孔以接收螺杆轴。 圆柱形套筒牢固地压配合到壳体的接收孔中。 套筒具有一对沿径向相对的位置形成在其内圆周上的轴向延伸凹槽。 安装在螺杆轴端部的引导销与凹槽啮合。 在壳体的接收孔的开口附近形成环形槽。 套筒通过卡止在环形槽中的止动环保持在接收孔中。
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