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.

Methods and system are provided for locking a half shaft to a wheel hub to engage four wheel drive are disclosed. In one example, a wheel hub is locked to a half shaft via a radially expanding engagement mechanism. The radially expanding engagement mechanism is without grease and without springs.

A control device for a power transmission mechanism includes a controller. The power transmission mechanism includes an engagement mechanism and an operation mechanism including a movable member and a guide member. The guide member includes a plurality of guide areas being configured to move relative to the movable member to guide the movable member to an engaging position or to a disengaging position. The controller is configured to switch, when determining that a predetermined condition related to traveling of the vehicle is satisfied, a contact guide area that is in contact with the movable member to guide the movable member to the engaging position or to the disengaging position, from a first guide area to a second guide area that are included in the plurality of guide areas.

Clutch arrangement provided with a housing and a clutch device, one of which serves as a clutch element carrier for a clutch element and the other serves as a friction region carrier. The clutch element has a carrier for a friction lining and a holding apparatus for receiving the carrier on the clutch element carrier, radially adjacently with respect to the friction lining. In a first radial region, the clutch housing has an axial projection at a first axial spacing from the clutch device and, with a radial offset with respect thereto, has an axial recess at a second axial spacing from the clutch device in a second radial region, and has a transition region radially between the axial projection and the axial recess, either the axial projection or the axial recess being intended to provide a bearing face for at least one component of the clutch device.

A hand crank for a landing gear is described, the hand crank having a main body provided at a first end with a connecting element for fastening the hand crank to an input shaft of the landing gear and formed at an opposite, second end to rotate the hand crank. The hand crank only allows torque to be transmitted from the hand crank to the input shaft if the operator holds the hand crank with at least one hand. A clutch is arranged in the force flow between the first end of the main body and the connecting element, wherein the clutch is held in an open disconnected position and is moved into a force-locked connection position by operating an actuating element arranged at the second end.

Methods and system are provided for locking a half shaft to a wheel hub to engage four wheel drive are disclosed. In one example, a wheel hub is locked to a half shaft via a radially expanding engagement mechanism. The radially expanding engagement mechanism is without grease and without springs.

An armature is configured to come into contact with an actuator due to magnetic attraction force. An outer plate is fixed to an armature, the outer plate being located on an opposite side of the armature from the actuator, the outer plate being configured to rotate together with the armature. An inner hub is located between the armature and the outer plate to be movable in a direction along a rotation axis, the inner hub being fixed to a driven device. A rubber member is disposed between the inner hub and the outer plate to give an urging force to the inner hub and the outer plate in a direction away from each other. This electromagnetic clutch is configured such that the urging force of the rubber member non-linearly increases as the actuator and the armature approach each other due to the magnetic attraction force.

A hydraulic system includes a normally open-type hydraulic clutch which connects or disconnects a power transmission line between an engine and a wheel, an actuator which supplies a hydraulic pressure to the hydraulic clutch, an oil flow path which connects the actuator to the hydraulic clutch, a valve member which is provided on the oil flow path and which enables to switch between an open state where the oil flow path communicates and a closed state where the oil flow path closes, a hydraulic pressure sensor which is provided on the oil flow path, and a bypass flow path which bypasses the valve member. A one-way valve, which permits a supply of a hydraulic pressure from an actuator side to a hydraulic clutch side and which shuts off a supply of a hydraulic pressure from the hydraulic clutch side to the actuator side, is provided on the bypass flow path.

A drive apparatus for a hybrid vehicle has an internal combustion engine, which has a crankshaft for outputting a drive power, and a torsional vibration reduction device, which is designed to reduce torsional vibrations and to transfer drive power from the crankshaft in the direction of a drivable wheel of the motor vehicle. A clutch device has a clutch input side, a clutch output side, a form-fit clutch and a frictional clutch. The torque transfer from the clutch input side to the clutch output side and thus from the crankshaft to the drivable wheel can be selectively produced, wherein the torque transition from the clutch input side to the clutch output side is enabled as soon as at least one of the two clutches is closed. The torsional vibration reduction device is arranged after the clutch device, relative to the torque transmission from the crankshaft in the direction of the drivable wheel. The clutch input side is connected to the crankshaft for conjoint rotation and the clutch output side is connected to the torsional vibration reduction device for conjoint rotation.

A clutch includes: an input member and an output member that rotate about an axis; an actuator fixed so as to be nonrotatable, the actuator having a plunger, a case, and a coil housed in the case; and an elastic member having one end which is connected to the output member via a bearing and another end which is connected to the plunger directly or indirectly. Further, when the coil is energized and the plunger is attracted in a direction of the axis, the another end of the elastic member is biased in the direction of the axis, the elastic member is elastically deformed, and the output member is consequently pressed against and engaged with the input member.