Abstract: An electric actuator includes a case, an electric motor 5 built in the case, and a motion conversion mechanism 4 configured to convert a rotary motion of the electric motor 5 into a linear motion. The electric motor 5 is fixed to the case (gear case 10) at a first end in an axial direction of the electric motor 5, and the electric actuator is provided with a first elastic member 50 between an outer peripheral surface of the electric motor 5 and an inner peripheral surface of the case (motor case 60) at a second end of the electric motor opposite to the first end fixed to the case (gear case 10).

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.

Abstract: Provided is an electric actuator, including: a driving motor (2); a motion conversion mechanism (6) configured to convert a rotary motion of the driving motor (2) to a linear motion; a transmission gear mechanism (5) configured to transmit a driving force from the driving motor (2) to the motion conversion mechanism (6); and a speed reduction mechanism (3) configured to reduce a speed of the rotary motion of the driving motor (2), and output the rotary motion reduced in speed to the transmission gear mechanism (5), wherein a side of one end portion of a rotation shaft (18) of a gear (16) of the transmission gear mechanism (5) is rotatably supported by a bearing (19), and a side of another end portion of the rotation shaft (18) of the gear (16) is rotatably supported by the output shaft (2a) of the driving motor (2).

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.

Abstract: An electric actuator 1 includes a drive unit 2, a driving force transmission mechanism 3, a motion conversion mechanism 4, an accommodation space accommodating the drive unit 2, the driving force transmission mechanism 3, and the motion conversion mechanism 4, and a ventilation section 5. The ventilation section 5 includes a vent 53 penetrating a partition wall partitioning the driving force transmission mechanism 3, an air flow path 46 communicating with the vent 53, and a filter 60.

Abstract: Provided is an electric actuator, including: a driving motor (2); a motion conversion mechanism (6) configured to convert a rotary motion of the driving motor (2) to a linear motion; a boot (27) configured to prevent entry of a foreign substance into the motion conversion mechanism (6); and a boot cover (31) arranged so as to cover an outer side of the boot (27), wherein the boot cover (31) is formed integrally with an exterior case (8) of the electric actuator, and wherein a boot mounting member (30) having the boot (27) mounted thereto is mounted to an inner side of the boot cover (31).

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.

Abstract: An electric actuator includes a case, an electric motor 5 built in the case, and a motion conversion mechanism 4 configured to convert a rotary motion of the electric motor 5 into a linear motion. The electric motor 5 is fixed to the case (gear case 10) at a first end in an axial direction of the electric motor 5, and the electric actuator is provided with a first elastic member 50 between an outer peripheral surface of the electric motor 5 and an inner peripheral surface of the case (motor case 60) at a second end of the electric motor opposite to the first end fixed to the case (gear case 10).

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.

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.

Abstract: An electric actuator 1 includes a drive unit 2, a driving force transmission mechanism 3, a motion conversion mechanism 4, an accommodation space accommodating the drive unit 2, the driving force transmission mechanism 3, and the motion conversion mechanism 4, and a ventilation section 5. The ventilation section 5 includes a vent 53 penetrating a partition wall partitioning the driving force transmission mechanism 3, an air flow path 46 communicating with the vent 53, and a filter 60.

Abstract: Provided is an electric actuator, including: a driving motor (2); a motion conversion mechanism (6) configured to convert a rotary motion of the driving motor (2) to a linear motion in an axial direction parallel with an output shaft (2a) of the driving motor (2); and a transmission gear mechanism (5) configured to transmit a driving force from the driving motor (2) to the motion conversion mechanism (6). The driving motor (2) is mounted to an actuator case (9) to which a double-row bearing (24) configured to support the motion conversion mechanism (6) and a bearing (19) configured to support the transmission gear mechanism (5) are mounted.

Abstract: Provided is an electric actuator, comprising: a driving motor (2); a motion conversion mechanism (6) configured to convert a rotary motion of the driving motor (2) to a linear motion in an axial direction parallel with an output shaft (2a) of the driving motor (2); and a transmission gear mechanism (5) configured to transmit a driving force from the driving motor (2) to the motion conversion mechanism (6), wherein a double-row bearing (24) configured to support the motion conversion mechanism (6) is arranged on an opposite side of the driving motor (2) with respect to the transmission gear mechanism (5), and wherein a relationship of L<Dm/2+Db/2 is satisfied, where Dm is an outer diameter of the driving motor (2), Db is an outer diameter of the double-row bearing (24), and L is an axis-to-axis distance (L) between the driving motor (2) and the motion conversion mechanism (6).

Abstract: A drive unit of an electrically assisted bicycle includes a movement restrictor to restrict the movement of a first bearing relative to a housing along a thrust direction. A first end surface of the first bearing is farther outward than a second end surface along the right-left direction. The housing includes an abutting portion that abuts the first end surface of the first bearing, and a groove that is farther inward than the abutting portion along the right-left direction. The movement restrictor includes the abutting portion, the groove of the housing, and an elastic member fitted in the groove.

Abstract: A drive unit for an electrically assisted bicycle includes a one-way clutch including an inner member linked to an end of a connecting shaft and an outer member linked to a drive sprocket wheel. The inner member includes clutch pawls and a boss. The outer member includes clutch teeth that are able to engage with the clutch pawls and an extension to be coupled to the drive sprocket wheel. The extension includes a recess to accept the boss at an inner member side thereof. The recess has an inner peripheral surface that is able to slide against an outer peripheral surface of the boss.

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.

Abstract: A method of manufacturing a bridge-type ball screw (1) with a bridge member (5) fit into a nut bridge window (6). The bridge member (5) has a linking groove (5a) with a rolling track that acts as a circulating path. After the bridge member (5) is fit into the nut bridge window (6), a cylindrical mandrel (8), with projections (9), is inserted into the nut (3). An upper die (10) restricts the upper surface of the bridge member (5) and is lowered while the nut (3) is held between the upper die (10) and the mandrel (8). A connection part is subject to plastic working by the projections (9) of the mandrel (8). The bridge member (5) is simultaneously deformed by the upper die (10) to secure the bridge member (5) into the nut bridge window (6).

Abstract: Provided is an electric actuator, including: a driving motor (2); a motion conversion mechanism (6) configured to convert a rotary motion of the driving motor (2) to a linear motion; a boot (27) configured to prevent entry of a foreign substance into the motion conversion mechanism (6); and a boot cover (31) arranged so as to cover an outer side of the boot (27), wherein the boot cover (31) is formed integrally with an exterior case (8) of the electric actuator, and wherein a boot mounting member (30) having the boot (27) mounted thereto is mounted to an inner side of the boot cover (31).

Abstract: Provided is an electric actuator, including: a driving motor (2); a motion conversion mechanism (6) configured to convert a rotary motion of the driving motor (2) to a linear motion; a transmission gear mechanism (5) configured to transmit a driving force from the driving motor (2) to the motion conversion mechanism (6); and a speed reduction mechanism (3) configured to reduce a speed of the rotary motion of the driving motor (2), and output the rotary motion reduced in speed to the transmission gear mechanism (5), wherein a side of one end portion of a rotation shaft (18) of a gear (16) of the transmission gear mechanism (5) is rotatably supported by a bearing (19), and a side of another end portion of the rotation shaft (18) of the gear (16) is rotatably supported by the output shaft (2a) of the driving motor (2).

Abstract: Provided is an electric actuator, including: a driving motor (2); a motion conversion mechanism (6) configured to convert a rotary motion of the driving motor (2) to a linear motion in an axial direction parallel with an output shaft (2a) of the driving motor (2); and a transmission gear mechanism (5) configured to transmit a driving force from the driving motor (2) to the motion conversion mechanism (6). The driving motor (2) is mounted to an actuator case (9) to which a double-row bearing (24) configured to support the motion conversion mechanism (6) and a bearing (19) configured to support the transmission gear mechanism (5) are mounted.