A landing gear assembly includes a leg assembly including a first portion and a second portion, wherein the first and second portions of the leg assembly telescopingly engage one another, a gear assembly operably coupled to the first and second leg portions and configured to telescopingly move the first and second leg portions with respect to one another, the gear assembly including an input shaft, and a drive assembly coupled to the gear assembly comprising a gear arrangement configured to drive the drive shaft of the gear assembly at a first speed and at a second speed that is different than the first speed, an electric motor configured to drive the gear arrangement, and a battery configured to provide power to the motor.

A linear actuator (1) comprising an electric motor (20), a transmission (40), a spindle (80) being connected to the transmission (40), a spindle nut (81) being arranged on the spindle (80), a housing (10), an outer tube (3) being connected to the housing (10), and an inner tube (2) being connected to the spindle nut (81). The spindle nut (81) and the inner tube (2) are guided inside the outer tube (3). The transmission (40) including a transmission housing (41), a transmission input end and a transmission output end positioned opposite the transmission input end. A coupling (30) including a first coupling part (32) being connected to the output end of the transmission, a second coupling part (34) being connected to the end of the spindle and a coupling member (36) disposed between the first and second coupling parts (32, 34) and slidably engaged with the first and second coupling parts (32, 34).

The present disclosure relates to a brake actuator unit and to an electromechanical brake. The brake actuator unit has a spindle, which is driven in rotation by an electric motor, and a brake piston in the form of a spindle nut, which surrounds the spindle and is configured to press against a brake lining.

A press machine for forming a part comprises a planetary gear system, a first motor, a second motor, a linear actuator, and a press ram that holds a tool. The planetary gear system includes a ring gear, a sun gear, and a plurality of planet gears between the sun gear and the ring gear. The planetary gear system has an output shaft that is coupled to the linear actuator. The first motor is coupled to the planetary gear system for producing a high-speed condition on the linear actuator and the press ram. A second motor is coupled to the planetary gear system for producing a high-torque condition on the linear actuator and a corresponding high-force condition the press ram. The press ram forms the part with the tool during the high-force condition.

An electrically operated valve having excellent wear resistance while suppressing cost is provided. The electrically operated valve comprises a valve main body having a valve seat; a motor including a stator fixed to the valve main body and a rotor driven to rotate with respect to the stator, a planetary gear type deceleration mechanism configured to decelerate rotation of the rotor to transmit to an output gear, a valve member configured to be movable toward and away from the valve seat in an axial direction, and a feed screw mechanism configured to convert rotational movement of the output gear into movement of the valve member in the axial direction. The planetary gear type deceleration mechanism includes a sun gear coupled to the rotor, a planetary gear engaged with the sun gear, a carrier for rotatably supporting the planetary gear, an annular ring gear engaged with the planetary gear, and a sliding member abutting against an axial end of the sun gear. The output gear has a different number of teeth than the ring gear, and engages with the planetary gear, and the sliding member is made of a different material from the material of the sun gear.

A brake caliper of a disc brake has a caliper body straddling a brake disc and having a thrust device housing accommodating a thrust device operatively connected to a translating screw nut. The translating screw nut is operatively connected to a worm. The worm is operatively connected to a gearbox and rotatably supported by a screw thrust bearing configured to apply for the worm an axial reaction. At least one part of the gearbox is rotatably supported by a gearbox thrust bearing configured to apply for the at least one part of the gearbox a radial reaction. The thrust bearing has at least one radially inner slewing ring and the gearbox has an epicyclic gear having a fixed gear or an internally toothed body cooperating with at least one planet gear rotatably supported about at least one planet gear pin connected to the at least one radially inner slewing ring to transmit action of the gearbox to the worm by the at least one radially inner slewing ring.

An epicyclic step-down gear for an electric parking brake, this step-down gear comprising a drive shaft, at least one step-down stage and a cylinder which forms a screw/nut system with an outer planet gear of this step-down gear. This step-down gear comprises at least one axial force transmission component which is positioned between a bearing ring of the drive shaft and the cylinder so as to transmit axial forces applied via either the bearing ring or the cylinder to either this bearing ring or this cylinder. Such an axial force transmission component prevents the drive shaft from buckling by defining an axial force transmission path which is radially eccentric.

An electric actuator 1 includes: an electric motor 10; a first motion conversion mechanism 20 that has a screw shaft 21 rotatably driven by the electric motor 10 and a nut 22 screwed with the screw shaft 21, and converts a rotary motion of the screw shaft 21 into a linear motion of the nut 22; and a housing 40 accommodating the electric motor 10 and the motion conversion mechanism 20. The housing 40 includes a pair of housing split bodies 41 and 42 split by a plane parallel to an axial direction of the screw shaft 21.

Linear actuator comprising a housing (1) consisting of two parts (1a, 1.sub.b), an electric motor (3) with a motor shaft, a transmission (8-11) in connection with the motor shaft, a spindle unit in connection with the transmission, where the spindle unit comprises at least a spindle (7) with a spindle nut (14) and where the spindle (7) is equipped with a bearing (12), an adjustment element (13) in connection with the spindle unit. The linear actuator is characterized in that a mounting unit (2) is embedded in the housing, said mounting unit (2) has a front and a rear end, and where the motor (3) is placed on the rear end of the mounting unit (2) and the spindle (7) is mounted on the front end of the mounting unit (2), and where the transmission (8-11) is located inside the mounting unit (2). In addition to being able to reduce the number of components with this construction, e.g. the activation element (13), the front mounting (15) and the spindle nut (14) can be moulded as one single plastic unit, it also allows for a slackening of the tolerances as the assembly of the components is considerably simplified, namely only with regard to the mounting unit (2). In that connection, the transmission (8-11) is expediently placed in the mounting unit (2).

An electrically operated valve having excellent wear resistance while suppressing cost is provided. The electrically operated valve comprises a valve main body having a valve seat; a motor including a stator fixed to the valve main body and a rotor driven to rotate with respect to the stator, a planetary gear type deceleration mechanism configured to decelerate rotation of the rotor to transmit to an output gear, a valve member configured to be movable toward and away from the valve seat in an axial direction, and a feed screw mechanism configured to convert rotational movement of the output gear into movement of the valve member in the axial direction. The planetary gear type deceleration mechanism includes a sun gear coupled to the rotor, a planetary gear engaged with the sun gear, a carrier for rotatably supporting the planetary gear, an annular ring gear engaged with the planetary gear, and a sliding member abutting against an axial end of the sun gear. The output gear has a different number of teeth than the ring gear, and engages with the planetary gear, and the sliding member is made of a different material from the material of the sun gear.