A gear shift operation mechanism capable of achieving reduction in size and weight, reduction in power consumption, simplification and reduction in number of component parts, and cost reduction is provided. A screw shaft that configures a ball screw, a motor that rotates the screw shaft, a nut that is screwed onto the screw shaft, a clutch that is disposed on the screw shaft, and a select lever that is integrated with the screw shaft by switching on the clutch, and has restraint cancelled with respect to the screw shaft by switching off the clutch are included, one end of a main lever is engaged with the nut, the other end is engaged or connected with a shaft, and the select lever is engaged with the main lever.

A shift system for shifting a gear unit has at least one movably disposed selector shaft and at least one switch element. The selected position of the switch element is changed by movement of the selector shaft relative to the switch element. A drive shaft is rotatable about a center axis. In a first selected position of the switch element, it can be connected to co-rotate at least in one direction of rotation to a component of the gear unit. In a second selected position of the switch element, it can be disconnectable from the component of the gear unit in each direction of rotation. At least a part of the switch element co-rotates with a rotation of the drive shaft about the center axis, so that relative movement of the switch element with respect to the selector shaft is generated. A gear unit has such a switch system.

A gear moving assembly includes: a tubular shaft having a hollow portion formed therein; a sliding unit including: a base disposed in the hollow portion of the shaft, and a plurality of sliders including respective rods that are disposed in the respective sliding channels to be slidable relative to the shaft in the longitudinal direction; a plurality of movable gears disposed around a circumferential surface of the shaft to be movable relative to the shaft in the longitudinal direction, and provided to correspond to the respective sliders; and a plurality of interlocking units configured to connect the sliders to the corresponding movable gears so that sliding of each of the sliders is independently interlocked with movement of the corresponding movable gear. A transmission includes the gear moving assembly.

A gear shift operation mechanism capable of achieving reduction in size and weight, reduction in power consumption, simplification and reduction in number of component parts, and cost reduction is provided. A screw shaft that configures a ball screw, a motor that rotates the screw shaft, a nut that is screwed onto the screw shaft, a clutch that is disposed on the screw shaft, and a select lever that is integrated with the screw shaft by switching on the clutch, and has restraint cancelled with respect to the screw shaft by switching off the clutch are included, one end of a main lever is engaged with the nut, the other end is engaged or connected with a shaft, and the select lever is engaged with the main lever.

A gear shifting device for a transmission of a vehicle has a rod configured to be connected to an actuator for moving the rod along a longitudinal axis of the rod, and a set of shift forks comprising a first shift fork and a second shift fork, the first and second shift forks being fixed to the rod so as to be actuated in unison. The rod has a first part and a second part configured to be mechanically connected to each other via at least one connection interface, wherein the first shift fork is fixed to the first part of the rod and the second shift fork is fixed to the second part of the rod.

A work vehicle includes a drive wheel, an electric motor, a first clutch, a second clutch, a first transmission part, a second transmission part, a first hydraulic chamber, and an urging member. The electric motor is configured to drive the drive wheel. The first clutch includes a first piston and a plurality of first clutch discs. The second clutch includes a second piston and a plurality of second clutch discs. The first transmission part receives a mechanical power outputted from the electric motor through the first clutch. The second transmission part receives the mechanical power outputted from the electric motor through the second clutch. The first hydraulic chamber is supplied with a hydraulic pressure for moving the first piston toward the plurality of first clutch discs. The urging member urges the second piston toward the plurality of second clutch discs.

A system and method for an actuation assembly for a transmission. The actuation assembly, in one example, includes a first cam device that is idly coupled to a support shaft and a second cam device idly coupled to the support shaft. The actuation assembly further includes a first one-way clutch which is coupled to the first cam device and an idler gear that is rotationally coupled to an actuator and a second one-way clutch that is coupled to the second cam device and the idler gear that is rotationally coupled to the actuator.