A device for actuating a rotating shaft selected from a plurality of parallel rotating shafts, comprising a driving shaft supported and actuated by corresponding rotation means, which is provided with a driving gear for the transmission of torque, a plurality of driven shafts each one of which is provided with a corresponding driven gear that is designed to be meshed with the driving gear, the driven gears being arranged on the respective driven shaft in an axial position that is offset with respect to the other driven gears, the driving gear being capable of performing a translational movement axially with means of translational motion for alternate meshing with one of the driven gears, the device further comprising means of prevention of rotation for the driven shafts whose driven gear is not meshed with the driving gear.

A transmission actuator for tractor includes: a motor which provides power; rails which are movable by operating the motor; a rail sensor which detects a neutral state of the rails; a position sensor which detects a movement displacement of the rails; and a rotation sensor which is mounted to the motor to detect the number of revolutions of the motor.

Provided is a vehicle speed-change system including the following: a transmission positioned to the rear of a crank shaft of an engine; a transmission case that retains the transmission; a shift mechanism that has a shift cam which performs a speed-change operation of the transmission; and a shift actuator that operates the shift cam. The transmission includes a counter shaft positioned to the rear of the crank shaft, and a drive shaft to which rotation of the counter shaft is transmitted. The shift cam is positioned further to the rear than the counter shaft, and the shift actuator is arranged in a rear portion of the transmission case and to the rear of the shift cam.

Provided is a vehicle speed-change system including the following: a transmission; a transmission case that retains the transmission; a shift mechanism that performs a speed-change operation of the transmission; and a shift actuator that operates the shift mechanism. The shift actuator includes the following: a motor; a transmission mechanism that transmits rotation of the motor; and an actuator output shaft that outputs motive power transmitted by the transmission mechanism. The shift actuator is fixed to a side surface of the transmission case, and is arranged such that at least a portion of the motor overlaps the shift mechanism in a side surface view of the vehicle.

An electric vehicle transmission system is disclosed. The electric vehicle transmission system is employing a planetary gear type speed reducer so as to implement first-gear shifting, second-gear shifting, or reverse shifting, thereby enabling reduced manufacturing costs of an electric vehicle while increasing the fuel efficiency of the electric vehicle, and also employing the planetary gear type speed reducer so as to implement forward and reverse shifting, thereby enabling reduced manufacturing costs of the electric vehicle while increasing the fuel efficiency of the electric vehicle.

A transmission structure of electric clutchless motorcycle includes an electric motor, a variable speed gear set, a variable speed gear box and a gear position sensing unit. The arrangement of the gear position sensing unit is so configured that the transmission structure of electric clutchless motorcycle mechanism not only maintains the inertial energy recharge of the electric motor to increase the endurance of the vehicle, but also allows the driver to accurately control the speed control knob when switching gears, and furthermore can increase the automatic gear shift function of the electric gear shift design.

A gear shifting device is provided, by which an axial shift movement of a shift element into a shift position through interaction of a shift pin with an associated groove-like shift gate that is changeable in an axial direction. The shift element features, on an inner diameter and/or an outer diameter, the associated shift gate, while the respective shift pin is arranged in a radially opposite and displaceable manner on a transmission component adjacent to the shift element. As an alternative, the shift element, on an inner diameter and/or an outer diameter, accommodates the respective shift pin in a radially displaceable manner, whereas the associated shift gate for the respective shift gate is arranged to be radially opposite on a transmission component located adjacent to the shift element. The shift pin is movable through an associated actuator in a radial manner between an initial position and a mesh position in which each shift pin is introduced into the associated shift gate.

A gear selector actuator (1) is provided with an electric linear drive that is accommodated in a housing (2) that is closed on an axial side by a cover (3) that has an opening (4) for an actuation element. The actuation element is held on the cover (3) and the housing (2) has a cap (5) covering an installation opening of the housing and securing the actuation element.

The present disclosure provides a transmission apparatus for an electric vehicle. The transmission apparatus for the electric vehicle includes a synchronization device connected to an input shaft, and a first shift device selectively engaged with the synchronization device to perform a gear shift operation, wherein the first shift device includes a first shift motor configured to receive power from the outside of the transmission apparatus and rotate, a first rotation shaft connected to the first shift motor to rotate about a rotation axis according to forward and reverse rotations of the first shift motor, a first movement block moving forward and backward in conjunction with the first rotation shaft, and a first shift fork connected to the first movement block to move integrally, and the synchronization device selectively operates to shift a gear as the first shift fork moves.

A multi-directional compliant shifting mechanism for a multi-speed power tool may couple a movable selector to a power transmission system of the tool, for selecting an operational speed of the multi-speed power tool. The complaint shifting mechanism may provide shifting compliance in a first direction in response to movement of the selector in a first direction, and may provide shifting compliance in a second direction in response to movement of the selector in a second direction. In one example, this multi-directional shifting compliance may be provided by interaction of the selector with a camming surface, in combination with a single compression spring. In another example, this multi-directional shifting compliance may be provided by first and second springs, selectively acting to provide compliance in the first and second directions.