The subject matter of this specification can be embodied in, among other things, an actuator that includes a worm drive assembly having a worm shaft, and a worm wheel configured as a ring having a radially outer perimeter comprising a first collection of gear teeth extending radially outward from the radially outer perimeter and at least partly engaged with the worm shaft, and a coaxial radially inner perimeter comprising a second collection of gear teeth extending radially inward from the inner perimeter, and an epicyclic gear assembly having a sun gear and a planet gear engaged with the sun gear and the second collection of gear teeth.

The subject matter of this specification can be embodied in, among other things, an actuator that includes a worm drive assembly having a worm shaft, and a worm wheel configured as a ring having a radially outer perimeter comprising a first collection of gear teeth extending radially outward from the radially outer perimeter and at least partly engaged with the worm shaft, and a coaxial radially inner perimeter comprising a second collection of gear teeth extending radially inward from the inner perimeter, and an epicyclic gear assembly having a sun gear and a planet gear engaged with the sun gear and the second collection of gear teeth.

The subject matter of this specification can be embodied in, among other things, an actuator that includes a worm drive assembly having a worm shaft, and a worm wheel configured as a ring having a radially outer perimeter comprising a first collection of gear teeth extending radially outward from the radially outer perimeter and at least partly engaged with the worm shaft, and a coaxial radially inner perimeter comprising a second collection of gear teeth extending radially inward from the inner perimeter, and an epicyclic gear assembly having a sun gear and a planet gear engaged with the sun gear and the second collection of gear teeth.

The subject matter of this specification can be embodied in, among other things, an actuator that includes a worm drive assembly having a worm shaft, and a worm wheel configured as a ring having a radially outer perimeter comprising a first collection of gear teeth extending radially outward from the radially outer perimeter and at least partly engaged with the worm shaft, and a coaxial radially inner perimeter comprising a second collection of gear teeth extending radially inward from the inner perimeter, and an epicyclic gear assembly having a sun gear and a planet gear engaged with the sun gear and the second collection of gear teeth.

A vertical raising safety rail. The safety rail includes lower linkage arm assemblies that are connected to a base and to a center rail assembly and configured to raise or lower the center rail assembly relative to the base when a rotational force is applied to the drive shaft. The safety rail also includes upper linkage arm assemblies that are connected to the center rail assembly and to a top rail. The upper linkage arm assemblies are connected to corresponding lower linkage assemblies and are configured to move the top rail relative to the center rail assembly. When the top rail is raised, one or more safety curtains are unfurled from a take-up roller inside the top rail to provide a safety curtain in the vertical plane of the safety rail.

A vertical raising safety rail. The safety rail includes lower linkage arm assemblies that are connected to a base and to a center rail assembly and configured to raise or lower the center rail assembly relative to the base when a rotational force is applied to the drive shaft. The safety rail also includes upper linkage arm assemblies that are connected to the center rail assembly and to a top rail. The upper linkage arm assemblies are connected to corresponding lower linkage assemblies and are configured to move the top rail relative to the center rail assembly. When the top rail is raised, one or more safety curtains are unfurled from a take-up roller inside the top rail to provide a safety curtain in the vertical plane of the safety rail.

An angle superimposition apparatus for a vehicle steering device with a planetary gear. The apparatus includes—a first shaft and a second shaft, which are arranged in a longitudinal direction so as to be rotatable relative to one another about the common longitudinal axis thereof. —A carrier arrangement is fixedly arranged to the body shell, on which carrier arrangement the first shaft and the second shaft and a rotor shaft are at least partially mounted and positioned so as to be rotatable. —An auxiliary drive with a stator is arranged on the carrier arrangement and with a rotor shaft, having a rotor, mounted rotatably and arranged coaxially with respect to the longitudinal axis and one of the shafts. —A planetary gear having a worm, which is arranged as a sun wheel so as to be rotatable about an axis of rotation and is arranged on the rotor shaft.

An angle superimposition apparatus for a vehicle steering device with a planetary gear. The apparatus includes—a first shaft and a second shaft, which are arranged in a longitudinal direction so as to be rotatable relative to one another about the common longitudinal axis thereof. —A carrier arrangement is fixedly arranged to the body shell, on which carrier arrangement the first shaft and the second shaft and a rotor shaft are at least partially mounted and positioned so as to be rotatable. —An auxiliary drive with a stator is arranged on the carrier arrangement and with a rotor shaft, having a rotor, mounted rotatably and arranged coaxially with respect to the longitudinal axis and one of the shafts. —A planetary gear having a worm, which is arranged as a sun wheel so as to be rotatable about an axis of rotation and is arranged on the rotor shaft.

The present application provides a motor gearbox used in, for example, a smart door lock. The gearbox may comprise a housing, a motor disposed in the housing, a gearbox output shaft disposed in the housing; and a clutch mechanism comprising a main gear and a planetary gear meshing with the main gear. The main gear may be connected and driven by the motor, and the planetary gear may be selectively connected to the gearbox output shaft when the motor drives the main gear to rotate. When the main gear is rotating, the planetary gear may move in a circumferential direction of the main gear.

The present application provides a motor gearbox used in, for example, a smart door lock. The gearbox may comprise a housing, a motor disposed in the housing, a gearbox output shaft disposed in the housing; and a clutch mechanism comprising a main gear and a planetary gear meshing with the main gear. The main gear may be connected and driven by the motor, and the planetary gear may be selectively connected to the gearbox output shaft when the motor drives the main gear to rotate. When the main gear is rotating, the planetary gear may move in a circumferential direction of the main gear.