A rotary actuator is used in a shift-by-wire system for a vehicle. A speed reducer includes a ring gear and a sun gear and reduces a rotational speed of the motor. An output shaft outputs rotation of the motor at a reduced rotational speed by the speed reducer. A regulating pin is disposed in a fixing member and allows the sun gear to revolve around a rotational axis of the motor and to rotate about an eccentric axis. The regulating pin is a separate member from the fixing member. The regulating pin has a strength equal to or greater than a maximum torque reaction force received from the sun gear. A first difference in hardness between an engaging portion and the sun gear is set to be less than a second difference in hardness between the fixing member and the sun gear.

Disclosed are a common control apparatus for parking and a clutch, an operating method thereof, and a vehicle. The common control apparatus for parking and a clutch comprises a parking mechanism, a clutch mechanism, and a motor; the parking mechanism comprises a positioning plate, a rotating drum connected to the positioning plate, a cam groove formed on the rotating drum, an elastic positioner, and positioning grooves; the positioning plate rotates under the driving of the motor; the elastic positioner interacts with the positioning grooves; the rotating drum can rotate to positions corresponding to parking lock, parking disengagement, clutch engagement, and clutch disengagement; the clutch mechanism comprises a clutch shifting fork assembly and a shifting fork driving cam; the cam groove comprises a straight groove and an engagement rotation groove; and when the shifting fork driving cam is located in the engagement rotation groove, the engagement rotation groove is engaged with the shifting fork driving cam to drive the clutch shifting fork assembly to move axially. The present invention simultaneously controls the disengagement and engagement of the parking mechanism and the clutch by means of one motor, and the apparatus has the advantages of simple structure, easy manufacturing, low cost, and high efficiency.

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.

The invention regards a device for the selection and the displacement of actuation members of a gearbox for motor vehicles that comprises a plurality of forward gear ratios and a reverse gear ratio, each associated to a respective actuation member. The device includes a mechanism for the assistance to the engagement of the reverse gear.

A parking lock for a transmission of a motor vehicle may include a park gear rotatable about an axis of rotation, and an actuation device adjustable into a locking position and an unlocking position radially relative to the axis of rotation. In the unlocking position, rotating of the park gear may be possible, and in the locking position, rotating of the park gear may be prevented by way of positive locking. The actuation device may include a shifting drum and a locking lever, wherein the shifting drum may be rotatable about a guiding axis that is radial relative to the axis of rotation. The locking lever, by way of a guide track formed in the shifting drum, may interact with the guide track so that when the shifting drum is rotated, the locking lever may be guidable by the guide track radially relative to the axis of rotation and parallel to the guiding axis, and thereby the actuation device may be adjustable into the locking position and into the unlocking position.

A gear shifting assembly of a transmission, a transmission, and an automobile. The present disclosure aims to address the problem of complicated structure existing in a gear shifting assembly or the like. To this end, the gear shifting assembly of a transmission according to the present disclosure includes a P-gear mechanism and a forward-gear mechanism, wherein the gear shifting assembly further includes a drive mechanism and a shifting mechanism, and the shifting mechanism is configured to be capable of switching the drive mechanism so that the P-gear mechanism or the forward-gear mechanism is in an operational state. By employing the common drive mechanism, the gear-shifting function of forward gears and the function of parking at the P-gear can be realized without interference, and on the basis of function integration, elements are saved so that the gear shifting assembly is made more compact in structure.

An actuator arrangement for operating a clutch and a parking lock in a driveline of a motor vehicle comprises: a clutch having a clutch actuating member configured to drivingly connect or disconnect a clutch input part and a clutch output part; a parking lock having a locking element movable to a locking position to lock a ratchet wheel, and to a release position to release the ratchet wheel; and a parking lock actuating member for actuating the locking element; a controllable actuator with a movable actuator setting member which is movable into at least three setting positions and is operatively connected to the clutch actuating member and to the parking lock actuating member such that in a first setting position the parking lock is closed, in a second setting position the clutch is closed, and in a third setting position the clutch and the parking lock are opened.

Provided is an axially-limited guide device applied in a parking mechanism. The parking mechanism includes a parking pawl and a parking shift fork that is axially movable. The guide device includes a parking bracket assembly and a guide block. The guide block is configured to be slidably engaged with an execution member at an end of the parking shift fork to allow for a relative rotation of the parking pawl and a rotary shaft. The parking bracket assembly is configured to axially limit the parking pawl and guide the parking shift fork. The parking bracket assembly includes a limiting portion abutting against the guide block. The limiting portion is configured to limit an axial movement of the guide block when the execution member at the end of the parking shift fork is axially disengaged from the guide block. Also provided are a parking mechanism and an automobile.

The invention relates to a device for actuating a park lock in an automatic transmission of a motor vehicle, in which a gear position selector can be used to set t at least one drive-, neutral- and park position, and in which, when the park position is selected, a park lock that is operatively connected to the automatic transmission can be actuated, and it can then be activated or deactivated by means of an emergency actuator device that can be operated manually. The emergency actuating device has a toothed wheel (gear) that can be made to engage with a spur gear that is configured as an intermediate toothed wheel (gear). According to the invention, a first engaging element engages into a control cam provided on the spur gear and, when the spur gear moves, said first engaging element can be moved in order to activate and deactivate the park lock in the control cam.

A gear shifting assembly of a transmission, a transmission, and an automobile. The present disclosure aims to address the problem of complicated structure existing in a gear shifting assembly or the like. To this end, the gear shifting assembly of a transmission according to the present disclosure includes a P-gear mechanism and a forward-gear mechanism, wherein the gear shifting assembly further includes a drive mechanism and a shifting mechanism, and the shifting mechanism is configured to be capable of switching the drive mechanism so that the P-gear mechanism or the forward-gear mechanism is in an operational state. By employing the common drive mechanism, the gear-shifting function of forward gears and the function of parking at the P-gear can be realized without interference, and on the basis of function integration, elements are saved so that the gear shifting assembly is made more compact in structure.