An agricultural header includes: a header frame; at least one cutting unit carried by the header frame and including a cutting element and a driveshaft coupled to the cutting element; and a gearbox configured to drive the cutting element. The gearbox includes a gearbox output rotatably coupled to the driveshaft; and a clutch including an intermediate shaft and at least one clutch shoe rotatably coupled to the intermediate shaft and displaceable between a non-engaging position where the at least one clutch shoe does not engage the gearbox output and an engaging position where the at least one clutch shoe engages the gearbox output. The clutch is configured such that the at least one clutch shoe displaces to the engaging position when a rotational speed of the intermediate shaft reaches a threshold value.

An agricultural header includes: a header frame; at least one cutting unit carried by the header frame and including a cutting element and a driveshaft coupled to the cutting element; and a gearbox configured to drive the cutting element. The gearbox includes a gearbox output rotatably coupled to the driveshaft; and a clutch including an intermediate shaft and at least one clutch shoe rotatably coupled to the intermediate shaft and displaceable between a non-engaging position where the at least one clutch shoe does not engage the gearbox output and an engaging position where the at least one clutch shoe engages the gearbox output. The clutch is configured such that the at least one clutch shoe displaces to the engaging position when a rotational speed of the intermediate shaft reaches a threshold value.

In most applications in the power transmission field, a means must be provided to repeatedly engage and disengage a powered spinning shaft from a receiving shaft. The invention introduces a simple new way of doing so by taking advantage of a common universal joint's inability to continue transferring torque beyond a certain angle. When the angle is reached, the universal joint locks up and acts as a simple pivoting arm. This pivoting arm is used to transfer the torque to a receiving shaft which is also equipped with a pivoting shaft inserted into the elongated tube of the universal joint (FIG. 4). At lesser angles, the universal joint tube simply spins around the receiving shaft's pivoting shaft, producing no movement of the receiving shaft (FIG. 3). This mechanism accomplishes a clutching and declutching action with no friction wearing surfaces, thus a frictionless clutch.

The present disclosure provides a bidirectional controllable overrunning clutch for a powertrain of a motor vehicle, with the powertrain including a gear having ratchet teeth. The clutch includes a pawl movable to a disengaged position, a locked position, and a transition state where the pawl permits the gear to rotate in the forward direction and where rotation of the gear in the reverse direction moves the pawl to the locked position. The clutch further includes a spring for moving the pawl to the disengaged position. The clutch further includes an actuator configured to hold the pawl in the transition state when the gear rotates in the forward direction and the locked position when the gear changes rotation from the forward direction to the reverse direction.

The present disclosure provides a bidirectional controllable overrunning clutch for a powertrain of a motor vehicle, with the powertrain including a gear having ratchet teeth. The clutch includes a pawl movable to a disengaged position, a locked position, and a transition state where the pawl permits the gear to rotate in the forward direction and where rotation of the gear in the reverse direction moves the pawl to the locked position. The clutch further includes a spring for moving the pawl to the disengaged position. The clutch further includes an actuator configured to hold the pawl in the transition state when the gear rotates in the forward direction and the locked position when the gear changes rotation from the forward direction to the reverse direction.

The present disclosure provides a bidirectional controllable overrunning clutch for a powertrain of a motor vehicle, with the powertrain including a gear having ratchet teeth. The clutch includes a pawl movable to a disengaged position, a locked position, and a transition state where the pawl permits the gear to rotate in the forward direction and where rotation of the gear in the reverse direction moves the pawl to the locked position. The clutch further includes a spring for moving the pawl to the disengaged position. The clutch further includes an actuator configured to hold the pawl in the transition state when the gear rotates in the forward direction and the locked position when the gear changes rotation from the forward direction to the reverse direction.

The present disclosure provides a bidirectional controllable overrunning clutch for a powertrain of a motor vehicle, with the powertrain including a gear having ratchet teeth. The clutch includes a pawl movable to a disengaged position, a locked position, and a transition state where the pawl permits the gear to rotate in the forward direction and where rotation of the gear in the reverse direction moves the pawl to the locked position. The clutch further includes a spring for moving the pawl to the disengaged position. The clutch further includes an actuator configured to hold the pawl in the transition state when the gear rotates in the forward direction and the locked position when the gear changes rotation from the forward direction to the reverse direction.

The present invention provides an active clutch mechanism and a hopping robot equipped with the same, the active clutch mechanism comprising: a sun gear; a planetary gear; and a winding gear. When the sun gear rotates in one direction, the planetary gear revolves around the sun gear in the one direction to come into contact with the winding gear, and then rotates the winding gear to wind a wire so as to store energy in an energy storage unit connected to the winding gear. When the sun gear rotates in a direction opposite to the one direction, the planetary gear revolves around the sun gear in the direction different from the one direction to become spaced from the winding gear, so as to discharge the energy stored in the energy storage unit.

The present invention provides an active clutch mechanism and a hopping robot equipped with the same, the active clutch mechanism comprising: a sun gear; a planetary gear; and a winding gear. When the sun gear rotates in one direction, the planetary gear revolves around the sun gear in the one direction to come into contact with the winding gear, and then rotates the winding gear to wind a wire so as to store energy in an energy storage unit connected to the winding gear. When the sun gear rotates in a direction opposite to the one direction, the planetary gear revolves around the sun gear in the direction different from the one direction to become spaced from the winding gear, so as to discharge the energy stored in the energy storage unit.

A power transmission device has a back torque transmission cam that brings driving clutch plates 6 and driven clutch plates 7 into press contact with each other. A second clutch member 4b is moved when a rotational force is input to a first clutch member 4a via the output shaft 3. The pressure member 5 is located at a non-actuation position. A torque transmission portion transmits a rotational force transmitted to the second clutch member 4b to the first clutch member 4a not via the back torque transmission cam.