A transmission device includes a shaft and two idler gears having gear toothings arranged coaxially with respect to an axis of rotation of the shaft and axially next to each other on the shaft. A switch element is fixed against rotation and arranged axially shiftably in relation to a first idler gear. With regard to the axis of rotation of the shaft, the switch element extends axially from between the two gear toothings up to a side of the first idler gear facing away from the second idler gear. The first idler gear has a passage through which the switch element passes in the axial direction. The switch element has a first switch toothing arranged axially between the idler gears and a second switch toothing arranged on the side of the first idler gear facing away from the second idler gear. The first switch toothing is connected to the second switch toothing in a manner fixed against rotation.

The disclosed transmission shift fork has improved contact areas that engage a gear that is shifted into and out of engagement with the drive train. As a result of the improved contact areas the gear and the shift fork have a more stable alignment that reduces wear during shifting and avoids uneven wear of the parts. The shift fork has an elongated pin that is positioned inside of a biasing spring. The pin has a length that is greater than the length of a compressed biasing spring, which contributes to increased stability and reduced wear from linear movement.

Disclosed is a coating method for a vehicle shift fork. In particular, an amorphous coating layer is formed on a pad part of the vehicle shift fork by using high velocity oxygen fuel spraying (HVOF) method. Also disclosed is a shift fork with an amorphous coating layer formed by the coating method. The coating method for a vehicle shift fork comprises: preparing a FeCrMo-based composition such as a powder; pretreating the shift fork by washing a pad part of the shift fork to remove impurities; forming a coating layer on the pad part using the FeCrMo-based powder by high velocity oxygen fuel spraying (HVOF) method; and cooling the coating layer at a rate of about 10.sup.6 to about 10.sup.8 K/s to form an amorphous coating layer.

Shift fork system and method. The shift fork system includes multiple fork guides that are removably coupled to a shift fork body. Each fork guide is configured to removably mate with a clutch assembly, including a hub, to enable the clutch assembly to be adjusted. Further, multiple attachment devices in the shift fork system are each be configured to releasably fix a position of one of the fork guides in relation to the clutch assembly.

Provided herein is a coating method for a vehicle shift fork, and the method includes: preparing a FeCrMo-based composition such as a powder; pretreating the shift fork by washing a pad part of the shift fork to remove impurities; forming a coating layer on the pad part using the FeCrMo-based powder by high velocity oxygen fuel spraying (HVOF) method; and cooling the coating layer at a rate of about 10.sup.6 to about 10.sup.8 K/s to form an amorphous coating layer. Further provided are an amorphous coating formed by high velocity oxygen fuel spraying (HVOF) method and a shift fork including the amorphous coating.

A vehicle drive unit has an electric machine and a manual gearbox with first and second shift elements and two planetary gear sets coupled to one another. Each gear set has a sun shaft, a ring gear shaft, and a web shaft. The second sun shaft is drivable by the electric machine and is configured as an output of the shift gear. The second ring gear shaft is connected rotationally fixed to the first web shaft, and the first sun shaft is connected rotationally fixed to a stationary component. When actuated, the first shift element connects the first ring gear shaft to an element of the first planetary gear set and/or of the second planetary gear set. When actuated, the second shift element connects the first ring gear shaft rotationally fixed to the second sun shaft or the second web shaft in order to shift a second gear.

A transmission includes a shifting fork. The transmission has a first gear state and a second gear state being selectable by means of the shifting fork. The shifting fork is displaceable in an axial direction between a first predetermined position and a second predetermined position. The first gear state is provided when the shifting fork is placed in the first predetermined position and the second gear state is provided when the shifting fork is placed in the second predetermined position. The first predetermined position and the second predetermined position are arranged one after the other without any further predetermined position providing a further selectable gear state arranged between the first predetermined position and the second predetermined position. The first gear state provides a first gear of the transmission and the second gear state provides a second gear or a park lock state of the transmission.

A transmission device includes a shaft and two idler gears having gear toothings arranged coaxially with respect to an axis of rotation of the shaft and axially next to each other on the shaft. A switch element is fixed against rotation and arranged axially shiftably in relation to a first idler gear. With regard to the axis of rotation of the shaft, the switch element extends axially from between the two gear toothings up to a side of the first idler gear facing away from the second idler gear. The first idler gear has a passage through which the switch element passes in the axial direction. The switch element has a first switch toothing arranged axially between the idler gears and a second switch toothing arranged on the side of the first idler gear facing away from the second idler gear. The first switch toothing is connected to the second switch toothing in a manner fixed against rotation.

The disclosed transmission shift fork has improved contact areas that engage a gear that is shifted into and out of engagement with the drive train. As a result of the improved contact areas the gear and the shift fork have a more stable alignment that reduces wear during shifting and avoids uneven wear of the parts. The shift fork has an elongated pin that is positioned inside of a biasing spring. The pin has a length that is greater than the length of a compressed biasing spring, which contributes to increased stability and reduced wear from linear movement.

An electric drive for a vehicle includes at least one electric machine (1) with a rotor shaft (2) as a drive shaft, a transmission connected to a first output shaft (3) and a second output shaft (4), and a shift element (5) with at least one actuatable coupling element for achieving a first shift position (N), a second shift position (S2) and a third shift position (S2). In the first shift position (N), the coupling element is connected either to an element of the transmission or to the rotor shaft (2). In the second shift position (S1), the element of the transmission is connected to the rotor shaft (2) via the coupling element. In the third shift position (S2), the element of the transmission and the rotor shaft (2) are connected to the housing via the coupling element.