A switchable ratcheting clutch achieves four different modes of operation based on a relative rotational position of a cam ring and an inner ring. In a central relative position, an outer ring can rotate freely in either direction with respect to the inner ring. In either extreme relative position, the outer ring is prevented from rotating in either direction relative to the inner ring. In intermediate positions one either side of the central position, the outer ring is permitted to rotate in one direction but not the other. A number of pawls are supported on the inner ring and pushed radially out of engagement with the outer ring by a spring on a spring cage. The spring cage moves with the cam ring between the one-way positions but the cam ring rotates relative to the spring cage when moving into the extreme positions.

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 switchable ratcheting clutch achieves four different modes of operation based on a relative rotational position of a cam ring and an inner ring. In a central relative position, an outer ring can rotate freely in either direction with respect to the inner ring. In either extreme relative position, the outer ring is prevented from rotating in either direction relative to the inner ring. In intermediate positions one either side of the central position, the outer ring is permitted to rotate in one direction but not the other. A number of pawls are supported on the inner ring and pushed radially out of engagement with the outer ring by a spring on a spring cage. The spring cage moves with the cam ring between the one-way positions but the cam ring rotates relative to the spring cage when moving into the extreme positions.

A switchable ratcheting clutch achieves four different modes of operation based on a relative rotational position of a cam ring and an inner ring. In a central relative position, an outer ring can rotate freely in either direction with respect to the inner ring. In either extreme relative position, the outer ring is prevented from rotating in either direction relative to the inner ring. In intermediate positions one either side of the central position, the outer ring is permitted to rotate in one direction but not the other. A number of pawls are supported on the inner ring and pushed radially out of engagement with the outer ring by a spring on a spring cage. The spring cage moves with the cam ring between the one-way positions but the cam ring rotates relative to the spring cage when moving into the extreme positions.

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 device is described for transmitting mechanical power that allows variable output-speed to input-speed ratios. Gear sets such as epicyclic gear sets have components that rotate about a common axis selectively at the same rotational speed and at different relative rotational speeds as determined by at least one of fluid flow and fluid pressure. One or more inlet ports and fluid passageways introduce a working fluid into one or more volume spaces between the components. The internal pressure and flow of the working fluid through the device is controlled to provide substantially infinite variability of the output-speed to input-speed ratios for applications where, for example, an engine provides the mechanical power for propelling a vehicle.

A coupling assembly having an overrun mode and a channeled locking member are provided. The locking member has a ramped, open channel extending through a nose and main body of the locking member to an upper face of the main body. The locking member is movable between first and second positions. The first position is a coupling position and the second position is an uncoupling position. Pressurized fluid directed to a bottom of the channel urges the locking member towards the second position upon rotation of a first member of the assembly in a first direction relative to a second member of the assembly above a predetermined RPM to prevent abutting engagement of the locking member with a shoulder of the first member in the overrun mode.

A coupling assembly having an overrun mode and a channeled locking member are provided. The locking member has a ramped, open channel extending through a nose and main body of the locking member to an upper face of the main body. The locking member is movable between first and second positions. The first position is a coupling position and the second position is an uncoupling position. Pressurized fluid directed to a bottom of the channel urges the locking member towards the second position upon rotation of a first member of the assembly in a first direction relative to a second member of the assembly above a predetermined RPM to prevent abutting engagement of the locking member with a shoulder of the first member in the overrun mode.

A wet clutch (10) for mounting on a shaft (12) having an internal shaft conduit (88) for a hydraulic fluid is provided. The wet clutch (10) comprises: a clutch hub (16) configured to be mounted on the shaft (12), a clutch basket (18) configured to be rotationally supported relative to shaft (12), and a clutch pack (20) operationally connecting the clutch hub (16) and the clutch basket (18). The wet clutch (10) further comprises: a front part (34) configured to be fixed relative to the shaft, an actuator (22) supported by the front part (34) and radially spaced apart from the shaft (12), wherein the actuator (22) is configured to operationally connected to the shaft conduit (88). The wet clutch (10) further comprises: one or more relief valves (102) connected to the actuator and configured to release the hydraulic fluid.