A device to control rotation is disclosed. The device includes a stationary portion having an internal aperture with a frustoconical inner surface. The device also includes a movable portion having a frustoconical outer surface, adapted to engage the frustoconical inner surface, to stop rotation between the movable portion and the stationary portion when engaged. An input sleeve is included, configured to transmit an applied rotational force to the device, also configured so that, as the input sleeve moves in a first axial direction, the moveable portion engages the stationary portion, and as the input sleeve moves in a second and opposite axial direction, the moveable portion is pushed out of engagement with the stationary portion. The device further includes a one-way rotation governor, non-rotatably attached to the movable portion and non-rotatably attached to a shaft and configured to allow rotation between the movable portion and the shaft in one rotational direction and prevent rotation between the movable portion and the shaft in a second opposite rotational direction.

A device to control rotation is disclosed. The device includes a stationary portion having an internal aperture with a frustoconical inner surface. The device also includes a movable portion having a frustoconical outer surface, adapted to engage the frustoconical inner surface, to stop rotation between the movable portion and the stationary portion when engaged. An input sleeve is included, configured to transmit an applied rotational force to the device, also configured so that, as the input sleeve moves in a first axial direction, the moveable portion engages the stationary portion, and as the input sleeve moves in a second and opposite axial direction, the moveable portion is pushed out of engagement with the stationary portion. The device further includes a one-way rotation governor, non-rotatably attached to the movable portion and non-rotatably attached to a shaft and configured to allow rotation between the movable portion and the shaft in one rotational direction and prevent rotation between the movable portion and the shaft in a second opposite rotational direction.

An overhead lift includes a lift strap, a motor, an electromagnetic brake, and a release assembly. The motor includes a rotatable shaft coupled to the lift strap. The electromagnetic brake is coupled to the rotatable shaft and has an engaged state and a disengaged state. The release assembly is engaged with the electromagnetic brake. The release assembly incudes a release lever engaged with the electromagnetic brake and a release strap. The release lever is moveable between a first position and a second position, wherein the release lever switches the electromagnetic brake to the disengaged state when in the second position. The release strap is coupled to the release lever. Tensioning of the release strap moves the release lever from the first position to the second position thereby switching the electromagnetic brake to the disengaged state.

A mute hand winch includes a supporting system, a drive system and a braking system. The drive system includes a drive shaft, a capstan assembly and a first gear. Both the drive shaft and the capstan assembly are disposed at the base, the first gear is in threaded connection with the drive shaft, and the first gear is engaged with the capstan assembly. The braking system includes a second gear and a third gear. The second gear is sleeved on the drive shaft and is located at one side of the first gear. There is a gap between the first gear and the second gear. The first gear and the second gear are selectively attached and locked tightly to prevent the first gear and the capstan assembly from rotating. The third gear is fixed at the base, and the third gear has an unilateral bearing.

A mute hand winch includes a supporting system, a drive system and a braking system. The drive system includes a drive shaft, a capstan assembly and a first gear. Both the drive shaft and the capstan assembly are disposed at the base, the first gear is in threaded connection with the drive shaft, and the first gear is engaged with the capstan assembly. The braking system includes a second gear and a third gear. The second gear is sleeved on the drive shaft and is located at one side of the first gear. There is a gap between the first gear and the second gear. The first gear and the second gear are selectively attached and locked tightly to prevent the first gear and the capstan assembly from rotating. The third gear is fixed at the base, and the third gear has an unilateral bearing.

A mute hand winch includes a supporting system, a drive system and a braking system. The drive system includes a drive shaft, a capstan assembly and a first gear. Both the drive shaft and the capstan assembly are disposed at the base, the first gear is in threaded connection with the drive shaft, and the first gear is engaged with the capstan assembly. The braking system includes a second gear and a third gear. The second gear is sleeved on the drive shaft and is located at one side of the first gear. There is a gap between the first gear and the second gear. The first gear and the second gear are selectively attached and locked tightly to prevent the first gear and the capstan assembly from rotating. The third gear is fixed at the base, and the third gear has an unilateral bearing.

A mute hand winch includes a supporting system, a drive system and a braking system. The drive system includes a drive shaft, a capstan assembly and a first gear. Both the drive shaft and the capstan assembly are disposed at the base, the first gear is in threaded connection with the drive shaft, and the first gear is engaged with the capstan assembly. The braking system includes a second gear and a third gear. The second gear is sleeved on the drive shaft and is located at one side of the first gear. There is a gap between the first gear and the second gear. The first gear and the second gear are selectively attached and locked tightly to prevent the first gear and the capstan assembly from rotating. The third gear is fixed at the base, and the third gear has an unilateral bearing.

A system arrangement for the drive train of lifting mechanisms, such as crane lifting mechanisms, is disclosed. The system arrangement includes at least one drive motor (1, 1), at least one cable drum (2, 2) connected thereto, a reduction transmission (3) arranged between the drive motor (1, 1) and the cable drum (2, 2), an automatic overrun shutdown freewheel (6), and at least one safety brake (4, 4). To optimize such a drive train, at least one active motor locking assembly (5, 5) is utilized to hold the load when the drive motor (1, 1) is decelerated electrically to a rotary speed of zero. The active motor locking assembly is utilized instead of at least one passive operating brake.

A system arrangement for the drive train of lifting mechanisms, such as crane lifting mechanisms, is disclosed. The system arrangement includes at least one drive motor (1, 1), at least one cable drum (2, 2) connected thereto, a reduction transmission (3) arranged between the drive motor (1, 1) and the cable drum (2, 2), an automatic overrun shutdown freewheel (6), and at least one safety brake (4, 4). To optimize such a drive train, at least one active motor locking assembly (5, 5) is utilized to hold the load when the drive motor (1, 1) is decelerated electrically to a rotary speed of zero. The active motor locking assembly is utilized instead of at least one passive operating brake.

A brake device for an elevator hoisting machine includes: a rod movable in an axial direction; a plurality of pistons provided to the rod so as to be arranged side by side in the axial direction; a cylinder configured to accommodate each of the pistons therein and including a pressure control chamber formed between the cylinder and each of the pistons; a lining provided to the rod so as to be capable of coming into contact with a contacted body; and a spring device configured to press the pistons in a direction in which the lining is pressed against the contacted body. Gaps are respectively formed between at least one of the plurality of pistons and the rod and between pistons adjacent to each other. Each of the pistons is configured to be driven by a change in air pressure in the pressure control chamber.