A drive train for a rescue hoist includes a mounting portion for mounting the drive train within the rescue hoist. A load pin extends through the mounting portion and into a static structure of the rescue hoist to secure the drive train to the rescue hoist. The load pin is configured to sense the strain generated when the drive train imparts torque to the cable drum to rotate the cable drum. The sensed strain is communicated to a computer configured to calculate a torque generated by the drive train based on the sensed strain and further configured to calculate the load on the cable based on the sensed strain.

A winch has a supporting frame with a first wall and a second wall. The winch also has a drum interposed between the first and second walls and is supported by them so as to rotate about its longitudinal axis which is transverse to the walls. The winch also has a flexible element for moving a load being wound around the drum. The winch also has a drive structure associated with the first wall and with a transmission structure for rotationally actuating the drum. The winch may also have a reaction element which is associated with the second wall, which supports the drum so as to rotate and which is associated with the transmission structure in order to support them.

A winch has a supporting frame with a first wall and a second wall. The winch also has a drum interposed between the first and second walls and is supported by them so as to rotate about its longitudinal axis which is transverse to the walls. The winch also has a flexible element for moving a load being wound around the drum. The winch also has a drive structure associated with the first wall and with a transmission structure for rotationally actuating the drum. The winch may also have a reaction element which is associated with the second wall, which supports the drum so as to rotate and which is associated with the transmission structure in order to support them.

A miniature handheld electric traction device including a shell, a power supply part, a power motor, a reduction gear set, a braking part and a winding drum, wherein the power motor, the reduction gear set and the winding drum are arranged in the shell; the power motor is linked with the winding drum through the reduction gear set; a surface of the winding drum is wound with a traction rope; the reduction gear set includes a planetary gear; the sun gear of the planetary gear is coaxial with the winding drum; the power motor or the motor shaft of the power motor is inserted into the inner ring of the winding drum; the motor shaft is linked with the planetary gear.

A miniature handheld electric traction device including a shell, a power supply part, a power motor, a reduction gear set, a braking part and a winding drum, wherein the power motor, the reduction gear set and the winding drum are arranged in the shell; the power motor is linked with the winding drum through the reduction gear set; a surface of the winding drum is wound with a traction rope; the reduction gear set includes a planetary gear; the sun gear of the planetary gear is coaxial with the winding drum; the power motor or the motor shaft of the power motor is inserted into the inner ring of the winding drum; the motor shaft is linked with the planetary gear.

A control device that controls an electric hoisting machine includes: a tension sensor that detects tension of a pulling member; a mode input unit that inputs a mode switch signal to switch between a winding mode and an unwinding mode; and a control unit that controls the operation of a electric motor. The control unit, when set in the unwinding mode, controls the electric motor in accordance with a detection signal from the tension sensor to cause the rotating body to be inversely rotated when the tension of the pulling member is not less than a predetermined threshold value, and to prevent the rotating body from being inversely rotated when the tension of the pulling member is lower than the predetermined threshold value.

A drive unit is configured such that a closing side drum and an opening side drum are provided parallel to each other. In a state in which a closing side cable is wound around a small diameter portion of the closing side drum and an opening side cable is wound around a small diameter portion of the opening side drum, the sliding door moves from a predetermined position relative to an opening portion to a position where the opening portion is fully closed, and, in the state in which the closing side cable is wound around a large diameter portion of the closing side drum and the opening side cable is wound around a large diameter portion of the opening side drum, the sliding door moves from the predetermined position relative to the opening portion to a position where the opening portion is fully open.

A drive unit is configured such that a closing side drum and an opening side drum are provided parallel to each other. In a state in which a closing side cable is wound around a small diameter portion of the closing side drum and an opening side cable is wound around a small diameter portion of the opening side drum, the sliding door moves from a predetermined position relative to an opening portion to a position where the opening portion is fully closed, and, in the state in which the closing side cable is wound around a large diameter portion of the closing side drum and the opening side cable is wound around a large diameter portion of the opening side drum, the sliding door moves from the predetermined position relative to the opening portion to a position where the opening portion is fully open.

A transmission apparatus is disclosed. The transmission apparatus includes at least a first gearset and a last gearset. Each gearset includes a sun gear, a set of planetary gears, and a ring gear. The ring gears have splined outer surfaces. Each gearset has a rotational speed and a torque. A drum encloses and mates with the gearsets. The drum has splined inner surfaces that mate with the splined outer surfaces. The last splined outer surface transfers the last torque of the last gearset directly to the drum. The drum transfers at least a portion of the last torque to the first splined outer surface of the first gearset. This reduces the first rotational speed of the first gearset and increases the first torque of the first gearset, thereby reducing the last rotational speed of the last gearset and increasing the last torque of the last gearset.

A transmission apparatus is disclosed. The transmission apparatus includes at least a first gearset and a last gearset. Each gearset includes a sun gear, a set of planetary gears, and a ring gear. The ring gears have splined outer surfaces. Each gearset has a rotational speed and a torque. A drum encloses and mates with the gearsets. The drum has splined inner surfaces that mate with the splined outer surfaces. The last splined outer surface transfers the last torque of the last gearset directly to the drum. The drum transfers at least a portion of the last torque to the first splined outer surface of the first gearset. This reduces the first rotational speed of the first gearset and increases the first torque of the first gearset, thereby reducing the last rotational speed of the last gearset and increasing the last torque of the last gearset.