A torque restriction mechanism is provided by which torque cutoff and torque transmission can be reliably performed without being affected by a rotation state of the drive unit, and damage to a collision object can be reduced even with a simple configuration. The torque restriction mechanism includes a first clutch and a second clutch. The first clutch cuts off torque to a driven unit when reaction torque at a stationary portion of a motor equals or exceeds a first value. The second clutch that transmits torque in accordance with a rotation state of a rotor of the motor, cuts off torque to the driven unit when the reaction torque equals or exceeds a second value larger than the first value.

A torque restriction mechanism is provided by which torque cutoff and torque transmission can be reliably performed without being affected by a rotation state of the drive unit, and damage to a collision object can be reduced even with a simple configuration. The torque restriction mechanism includes a first clutch and a second clutch. The first clutch cuts off torque to a driven unit when reaction torque at a stationary portion of a motor equals or exceeds a first value. The second clutch that transmits torque in accordance with a rotation state of a rotor of the motor, cuts off torque to the driven unit when the reaction torque equals or exceeds a second value larger than the first value.

A clutch assembly for a hoist may comprise a first epicyclic gear train and a first set of friction disks rotationally coupled to the first epicyclic gear train. A second set of friction disks may be in operable communication with the first set of friction disks. Torque may be transferred between the first set of friction disks and the second set of friction disks by means of a friction coupling between the first set of friction disks and the second set of friction disks. A pinion may be rotationally coupled to the second set of friction disks. A splined portion of the pinion may form an output of the clutch assembly.

A clutch assembly for a hoist may comprise a first epicyclic gear train and a first set of friction disks rotationally coupled to the first epicyclic gear train. A second set of friction disks may be in operable communication with the first set of friction disks. Torque may be transferred between the first set of friction disks and the second set of friction disks by means of a friction coupling between the first set of friction disks and the second set of friction disks. A pinion may be rotationally coupled to the second set of friction disks. A splined portion of the pinion may form an output of the clutch assembly.

A hydro-viscous speed regulating device for heavy-load start of a belt conveyor is provided. An input shaft and an output shaft are connected through a spline tube, an inner friction plate set, and an outer friction plate set. The inner and outer friction plate sets are controlled by an inner oil cylinder and an outer oil cylinder respectively. Oil inlet and oil return of the inner oil cylinder and the outer oil cylinder are controlled by an oil inlet valve core and an oil return valve core automatically. During starting process, pressure oil enters into the outer oil cylinder, and pushes the outer friction plate set to be engaged to provide torque required by the output shaft. After the starting process is completed, the revolving speed of the output shaft rises; the oil inlet valve core and the oil return valve core move outward under the effect of a centrifugal force; the pressure oil enters into the inner oil cylinder and pushes the inner friction plate set to be engaged to provide torque required by the output shaft, and at the same time, oil returns to the outer oil cylinder. That is, during starting process, the outer friction plate set provides large torque required for start, and the inner friction plate set provides small torque during normal operation. The present invention achieves automatic switching between different torque required for start and normal operation. Moreover, the present invention has a compact structure, reliable performance, and low costs, and is applicable in a wide range.

A hydro-viscous speed regulating device for heavy-load start of a belt conveyor is provided. An input shaft and an output shaft are connected through a spline tube, an inner friction plate set, and an outer friction plate set. The inner and outer friction plate sets are controlled by an inner oil cylinder and an outer oil cylinder respectively. Oil inlet and oil return of the inner oil cylinder and the outer oil cylinder are controlled by an oil inlet valve core and an oil return valve core automatically. During starting process, pressure oil enters into the outer oil cylinder, and pushes the outer friction plate set to be engaged to provide torque required by the output shaft. After the starting process is completed, the revolving speed of the output shaft rises; the oil inlet valve core and the oil return valve core move outward under the effect of a centrifugal force; the pressure oil enters into the inner oil cylinder and pushes the inner friction plate set to be engaged to provide torque required by the output shaft, and at the same time, oil returns to the outer oil cylinder. That is, during starting process, the outer friction plate set provides large torque required for start, and the inner friction plate set provides small torque during normal operation. The present invention achieves automatic switching between different torque required for start and normal operation. Moreover, the present invention has a compact structure, reliable performance, and low costs, and is applicable in a wide range.

A driveline power transmitting component with a differential assembly having a differential input, first and second differential outputs, which are driven by the differential input, a first friction clutch, a first biasing spring and a second friction clutch. The first friction clutch has a friction plate that is non-rotatably but axially slidably coupled to the differential input. The first biasing spring urges the first friction clutch into an engaged condition in which the friction plate of the first friction clutch is frictionally engaged to the first differential output. The second friction clutch has a plurality of first clutch plates, which are axially slidably but non-rotatably coupled to the differential input, and a plurality of second clutch plates that interleaved with the first clutch plates and axially slidably but non-rotatably coupled to the first differential output.

A driveline power transmitting component with a differential assembly having a differential input, first and second differential outputs, which are driven by the differential input, a first friction clutch, a first biasing spring and a second friction clutch. The first friction clutch has a friction plate that is non-rotatably but axially slidably coupled to the differential input. The first biasing spring urges the first friction clutch into an engaged condition in which the friction plate of the first friction clutch is frictionally engaged to the first differential output. The second friction clutch has a plurality of first clutch plates, which are axially slidably but non-rotatably coupled to the differential input, and a plurality of second clutch plates that interleaved with the first clutch plates and axially slidably but non-rotatably coupled to the first differential output.

A clutch assembly for driveline components is provided. The ball ramp having first and second ball ramp members and at least one ball is provided. The first ball ramp member of the ball ramp is in operational communication with an input member to the clutch assembly. A first set of plates of a clutch pack are in operational communication with the input member and a second set of plates of the clutch pack are in operational communication with an output member. A sprag clutch assembly that is operationally coupled to the second ball ramp member of the ball ramp, only allows the second ball ramp member of the ball ramp to rotate in first direction. A thrust bearing that is in operational communication with the second ball ramp member of the ball ramp selectively disengages the clutch pack when the output member rotates in a second direction.

A clutch assembly for driveline components is provided. The ball ramp having first and second ball ramp members and at least one ball is provided. The first ball ramp member of the ball ramp is in operational communication with an input member to the clutch assembly. A first set of plates of a clutch pack are in operational communication with the input member and a second set of plates of the clutch pack are in operational communication with an output member. A sprag clutch assembly that is operationally coupled to the second ball ramp member of the ball ramp, only allows the second ball ramp member of the ball ramp to rotate in first direction. A thrust bearing that is in operational communication with the second ball ramp member of the ball ramp selectively disengages the clutch pack when the output member rotates in a second direction.