A chain block including: a gear unit including a pinion gear, and a load gear configured to rotate integrally with a load sheave member; a case body configured to house the gear unit and to be supplied with grease being semifluid or semisolid at a working temperature as a lubricant; and a built-in cover arranged inside the case body, wherein: the built-in cover includes a first peripheral wall part configured to cover an outer peripheral side of the pinion gear, and a second peripheral wall part provided to be larger in diameter than the first peripheral wall part, the first driven gear body including a first large-diameter driven gear meshing with the pinion gear; and the built-in cover is provided in a circulation shape without a break by continuation of the first peripheral wall part and the second peripheral wall part.

A chain block including: a gear unit including a pinion gear, and a load gear configured to rotate integrally with a load sheave member; a case body configured to house the gear unit and to be supplied with grease being semifluid or semisolid at a working temperature as a lubricant; and a built-in cover arranged inside the case body, wherein: the built-in cover includes a first peripheral wall part configured to cover an outer peripheral side of the pinion gear, and a second peripheral wall part provided to be larger in diameter than the first peripheral wall part, the first driven gear body including a first large-diameter driven gear meshing with the pinion gear; and the built-in cover is provided in a circulation shape without a break by continuation of the first peripheral wall part and the second peripheral wall part.

A power transmission system that is adapted to transmit forces from a motor to a component comprises an externally threaded shaft 551 that is rotatably attached to the motor, an internally threaded fastener that is movably attached to the externally threaded shaft, a first element, and a second element that is movably attached to the first element at a second joint and that is rigidly attached to the component at a third joint.

A power transmission system that is adapted to transmit forces from a motor to a component comprises an externally threaded shaft 551 that is rotatably attached to the motor, an internally threaded fastener that is movably attached to the externally threaded shaft, a first element, and a second element that is movably attached to the first element at a second joint and that is rigidly attached to the component at a third joint.

A drive train for a rescue hoist includes a first stage, a second stage, and a third stage. The first stage receives an input from a motor and the third stage provides rotational power to a cable drum. The first stage, second stage, and third stage are disposed coaxially within a common housing. The first stage provides a first speed reduction, the second stage provides a second speed reduction, and the third stage provides a third speed reduction between the motor and the cable drum. The common housing includes a mounting flange for mounting the drive train to the rescue hoist.

A drive train for a rescue hoist includes a first stage, a second stage, and a third stage. The first stage receives an input from a motor and the third stage provides rotational power to a cable drum. The first stage, second stage, and third stage are disposed coaxially within a common housing. The first stage provides a first speed reduction, the second stage provides a second speed reduction, and the third stage provides a third speed reduction between the motor and the cable drum. The common housing includes a mounting flange for mounting the drive train to the rescue hoist.

Methodologies, systems, and computer-readable media are provided for monitoring object locations on a shelving fixture. An electronic detection device includes a first motor for winding and unwinding a first line and a second motor for winding and unwinding a second line. A controller can control the operation of the first and second motor and the electronic detection device is suspended from the first and second line behind a shelving fixture. When the first and second motor wind and unwind the first and second line, the electronic detection device moves to an expected location of an object on a shelving fixture. The electronic detection device also includes sensors that can determine an identity of the object and the quantity of the object on the shelving fixture.

Methodologies, systems, and computer-readable media are provided for monitoring object locations on a shelving fixture. An electronic detection device includes a first motor for winding and unwinding a first line and a second motor for winding and unwinding a second line. A controller can control the operation of the first and second motor and the electronic detection device is suspended from the first and second line behind a shelving fixture. When the first and second motor wind and unwind the first and second line, the electronic detection device moves to an expected location of an object on a shelving fixture. The electronic detection device also includes sensors that can determine an identity of the object and the quantity of the object on the shelving fixture.

A rope hoist which hoists and lowers a cargo via a wire rope includes: a frame structure which rotatably supports a wheel; a rope drum mechanism which is provided on one side of the frame structure in a width direction, and includes a drum motor which rotates the rope drum; a counterweight which is provided on another side of the frame structure in the width direction and is arranged in a state of having a space with respect to the frame structure; and a control unit which is attached to a side of the counterweight opposite to the rope drum mechanism in the width direction and inverter-controls the drum motor, to the rope drum mechanism side of the counterweight, a braking resistor part which processes regenerative electric power in the inverter control is attached in a state of being located in the space.

A drawworks system for a mineral extraction system includes a drum mounted on a drum shaft and configured to support a cable. The system also includes a gearbox assembly having a gearbox housing, a gearbox supported by the gearbox housing and having a gearbox input shaft and a gearbox output shaft, wherein the gearbox input shaft is configured to be coupled to at least one motor and the gearbox output shaft is coupled to the drum shaft to drive rotation of the drum shaft and the drum, and a brake supported by the gearbox housing and coupled to the drum shaft to block rotation of the drum shaft and the drum, wherein the gearbox and the brake are positioned on one side of the drum along an axial axis of the drawworks system.