The electric retractable view device for a vehicle includes a view device rotating section including a view section body mounted therein, a rotation support section that supports the view device rotating section so as to be rotatable relative to a predetermined rotation axis, and an electric driving mechanism that electrically moves the view device rotating section to either of a retracted position and an extended position. The electric driving mechanism includes a motor, and a power transmission mechanism that transmits a drive force of the motor to the view device rotating section to rotate the view device rotating section in the direction around the rotation axis. The power transmission mechanism includes a double-threaded worm, and one or more motor-side worms disposed on the motor side relative to the double-threaded worm. Each of the one or more motor-side worms is a single-threaded worm.

A drive arrangement for a motor vehicle functional part includes: a housing, in which a drive motor, a gear mechanism and an adjustor are provided at least partially; a drive shaft configured to transfer the adjustor via the gear mechanism from a closed position into an open position and vice versa; and a wrap spring arrangement comprising two wrap spring members, which act in opposite directions. The wrap spring arrangement is arranged on a gear mechanism output side, in a region of the adjustor.

Actuators for high lift devices on aircraft are disclosed herein. An example apparatus includes an actuator for a high lift device of an aircraft including a motor and a transmission, where the transmission includes a first gear stage and a second gear stage, the first gear stage including a first worm gear and the second gear stage including a second worm gear, the first worm gear, the second worm gear and the motor operative to prevent backdrive of the actuator.

The present invention is characterized by comprising: a pair of worm shafts, which are arranged in parallel with each other so as to have gear directions that are opposite to each other, and which are configured to be rotated in the same direction by a driving means; a following shaft that crosses the middle of the pair of worm shafts in the perpendicular direction; a pair of ring gears fixedly installed on the following shaft so as to face each other from both sides of the worm shafts; a worm wheel, which engages with the outer side of each worm shaft, and which has shaft gears formed on both sides thereof, respectively, such that the shaft gears engage with the ring gears; and a rotating member connected to the following shaft such that a rotating force, which is in a speed-reduced sate, is output.

A pressure generating device for a vehicle braking system includes a motor with a worm attached or formed on its motor shaft; a worm gear which, with the aid of a rotation of the motor shaft, can be made to carry out a rotary movement about a rotary axis oriented at an incline to the motor shaft; and a piston that is adjustable at least with the aid of the rotary movement of the worm gear, where a first spindle nut is attached or formed on the worm gear, and at least a first spindle is attached or formed on the piston, the first spindle being adjustable along the rotary axis with the aid of the rotary movement of the worm gear oriented about the rotary axis in such a way that the piston is also adjustable along the rotary axis or in parallel to the rotary axis.

A drive device includes a housing, a motor and a transmission assembly; the housing includes a first casing and a second casing; the first casing includes a first protruding portion and a second protruding portion; the second casing includes a third protruding portion; the transmission assembly includes a first-stage worm, a second-stage worm and a transmission wheel; the first-stage worm includes a first tooth-shaped portion; the second-stage worm includes a second tooth-shaped portion; the first protruding portion and the second protruding portion both limitedly cooperate with the second-stage worm; along the axial direction of the second tooth-shaped portion, the first protruding portion is located on one side of the second tooth-shaped portion; the second protruding portion is located on the other side of the second tooth-shaped portion; and the distance between the third protruding portion and the transmission wheel is within a preset range.

A boat lift that may have a first worm screw operably connected to the drive shaft defining an axis of rotation aligned with the drive shaft and operably contacting a first worm gear, the first worm screw and the first worm gear defines a first lifting stage. The boat lift may also have a second worm screw operably connected to the first worm gear and operably contacts a second worm gear, the second worm screw and the second worm gear defines a second lifting stage. The boat lift may have a tapered roller bearing assembly that operably engages the second worm screw, the tapered roller bearing assembly has a first tapered roller bearing secured at a first location proximate a first end of the second worm screw and a second tapered roller bearing secured at a second location proximate a second opposing end of the second worm screw.

The present disclosure relates to a transmission mechanism for a base station antenna, and a base station antenna including the transmission mechanism. The transmission mechanism includes a motor and at least one connecting rod, wherein a gear mechanism is provided on a first end of the connecting rod, and the motor drives the connecting rod to rotate via the gear mechanism; and wherein a worm gear unit is provided on a second end of the connecting rod opposite to the first end, and the worm gear unit is configured to drive a movable element of a phase shifter when the connecting rod rotates. The transmission mechanism according to the present disclosure can generate greater driving force through the worm gear unit, and has a shorter axial length and a smaller height, and thus is particularly suitable for a more compact and thinner 5G base station antenna.

A vehicle brake slack adjuster includes a housing coupled to a brake actuator and supporting a driving worm wheel engaging the brake cam shaft and a driving worm screw meshed with the driving worm wheel and transferring a brake actuating force, imparted by the brake actuator to the housing, to the driving worm wheel and cam shaft. The adjuster further includes a wear adjustment mechanism including a reference arm fixed against movement and including a control ring gear, a pinion gear meshed with the control ring gear and configured for rotation about an axis, a clutch ring disposed about the axis and configured for rotation with the pinion gear, a control worm screw disposed about the axis, a wrap spring engaging surfaces of the clutch ring and control worm screw and a control worm wheel meshed with the control worm screw and configured for rotation with the driving worm screw.

A double eccentric positioning apparatus uses two equal offset eccentric bushings to accurately position a tool (such as a drill bushing) in two dimensions. Miniature servo motors and precise gearing control the rotation of each eccentric bushing, which controls the direction of the offset vectors. The offset vectors are used to determine the final position of the drill bushing. The desired rotation angles can be mathematically calculated based on desired position. The inner eccentric bushing is located concentric to the offset of the outer eccentric bushing. This allows any position, within a radius of two times the eccentric offset, to be achieved. The use of worm gearing on the eccentric bushings prevents back-driving of the servo motors, due to the lead angle of the worm gears, and the friction between the worm wheel and worm gear.