A milling machine includes a rotor drive transmission having a plurality of gears disposed between a prime mover and a cutting rotor. The rotor drive transmission is associated with a rotor transmission hydraulic circuit including a hydraulic gearshift actuator to engage the plurality of gears in one or more gear ratios and a gearshift directional control valve to direct hydraulic fluid to and from the hydraulic gearshift actuator. In occurrence of a fault condition, the rotor transmission hydraulic circuit includes a gearshift trapping valve to maintain hydraulic pressure in the hydraulic gear actuator and the engaged gear ratio of the rotor drive transmission.

A stroke sensor includes a cover that covers a slide end on a protrusion side of a shaft in a slide region between the shaft and a housing while allowing a relative movement between the shaft and the housing, wherein a flange surface the extends radially outward from the slide end is provided on the housing, an axial direction seal that is in close contact with the flange surface in the axial line direction is provided on the cover, and a fixation member that presses the axial direction seal to be in contact with the flange surface is further provided.

Embodiments of this application provide a speed shifting apparatus, a control method thereof, a steering system, and a control method thereof, and relate to the field of mechanical transmission technologies. The speed shifting apparatus includes: an outer rotating wheel; an inner rotating wheel, where a rotation axis of the inner rotating wheel is parallel to and different from a rotation axis of the outer rotating wheel; and a plurality of meshing members, arranged along a circumferential direction of the inner rotating wheel or the outer rotating wheel. Either the outer rotating wheel or the inner rotating wheel is provided with a plurality of sliding grooves, and the plurality of sliding grooves are in a one-to-one correspondence with the plurality of meshing members.

Embodiments of this application provide a speed shifting apparatus, a control method thereof, a steering system, and a control method thereof, and relate to the field of mechanical transmission technologies. The speed shifting apparatus includes: an outer rotating wheel; an inner rotating wheel, where a rotation axis of the inner rotating wheel is parallel to and different from a rotation axis of the outer rotating wheel; and a plurality of meshing members, arranged along a circumferential direction of the inner rotating wheel or the outer rotating wheel. Either the outer rotating wheel or the inner rotating wheel is provided with a plurality of sliding grooves, and the plurality of sliding grooves are in a one-to-one correspondence with the plurality of meshing members.

A shift selector device includes an input member, a position setting mechanism and an activation controller. A selection operation of selecting a shift position is input to the input member. The position setting mechanism defines a movable range of the input member while supporting the input member in a displaceable manner. A plurality of the shift positions and at least one activation position linked to an automated travel system are disposed in the movable range. When the activation position is selected by displacement of the input member, the activation controller outputs an activation instruction for instructing a control function of the automated travel system linked to the activation position to be activated.

A drive assembly for a work vehicle includes a housing arrangement, a drive shaft rotatable in first and second clock directions, and a two-stage planetary gear set coupled to the drive shaft. The gear set includes, or is coupled to, an output element. First and second clutch arrangements are configured to selectively engage the gear set to effect first and second gear ratios, respectively. A step ratio from the first gear ratio and the second gear ratio is 3:1. At least one first actuator and at least one second actuator are configured to effect movement of the first and second clutch arrangements, respectively, to selectively engage the gear set. The drive shaft and the output element rotate in a same clock direction with the first clutch arrangement engaged with the gear set, and in opposite clock directions with the second clutch arrangement engaged with the gear set.

An actuating device for actuating gear shifting units of a manual transmission has deflectable transmission elements assigned to a respective gear shift unit for changing the gear ratio, a movable actuating element, and gear shift elements assigned thereto. The gear shift elements are movable together with the actuating element and are arranged in two gear shift groups. Dependent on a selecting position of the actuating element, the gear shift elements are coupled with coupling means for deflecting the transmission elements by means of a shifting movement. The shifting movement is independent of the selecting movement. The selecting position can be changed in selecting steps that are delimited by a selecting step length. At least one first gear shift element has an interconnected first gear shift length which is greater than the selecting step length.

An actuating device for actuating gear shifting units of a manual transmission has deflectable transmission elements assigned to a respective gear shift unit for changing the gear ratio, a movable actuating element, and gear shift elements assigned thereto. The gear shift elements are movable together with the actuating element and are arranged in two gear shift groups. Dependent on a selecting position of the actuating element, the gear shift elements are coupled with coupling means for deflecting the transmission elements by means of a shifting movement. The shifting movement is independent of the selecting movement. The selecting position can be changed in selecting steps that are delimited by a selecting step length. At least one first gear shift element has an interconnected first gear shift length which is greater than the selecting step length.

A shift device includes: a shift switching member including valley portions corresponding to shift positions; a motor including a rotor and a stator and configured to drive the shift switching member; a first drive system including a first control unit configured to control a voltage for driving the motor; a second drive system provided separately from the first drive system and including a second control unit configured to control a voltage for driving the motor; and a positioning member configured to establish the shift positions in a state in which the positioning member is fitted into any one of the valley portions of the shift switching member. The shift device acquires the shift positions when the motor is driven by the voltage output from one of the first and second drive systems to move the positioning member such that the positioning member continuously passes through the valley portions.

In some implementations, a controller may cause a gearbox coupled to a rotor to shift between a first gear ratio and a second gear ratio one or more times. The controller may obtain a first set of position data that identifies respective first positions of a gear selector of the gearbox for each shift to the first gear ratio, and a second set of position data that identifies respective second positions of the gear selector of the gearbox for each shift to the second gear ratio. The controller may determine a first calibrated position of the gear selector for a shift to the first gear ratio based on the first set of position data and a second calibrated position of the gear selector for a shift to the second gear ratio based on the second set of position data.