A gear transmission having a speed changing section includes a speed changing gear for setting a speed stage and a shift gear slidably mounted on a rotation support shaft and operated to engage and disengage with the speed changing gear, the speed changing section configured to speed-change inputted power and to output the resultant power via the rotation support shaft. An arrangement is provided for facilitating engagement of the shift gear with the speed changing gear even when respective end faces of the shift gear and the speed changing gear hit each other. A transmission mechanism (20B) is provided for outputting power of a rotation support shaft (24) to a traveling device. The transmission mechanism (20B) has a transmission flexibility portion (80) which allows free rotation of the rotation support shaft (24) by a set rotation angle.

Provided are a seven-speed double clutch transmission and a vehicle. The seven-speed double clutch transmission includes: an outer input shaft and an inner input shaft, a 4/6-speed driving gear and a 2-speed driving gear are sequentially fixed on the outer input shaft, and a 1-speed driving gear, a 3-speed driving gear and a 5/7-speed driving gear are sequentially fixed on the inner input shaft; a first output shaft and a second output shaft, a 4-speed driven gear, a 2-speed driven gear, a 1-speed driven gear and a 5-speed driven gear, are sequentially fixed on the first output shaft, and a 6-speed driven gear, a reverse gear, a reverse gear synchronizer, a 3-speed driven gear and a 7-speed driven gear are sequentially fixed on the second output shaft.

A gear transmission having a speed changing section includes a speed changing gear for setting a speed stage and a shift gear slidably mounted on a rotation support shaft and operated to engage and disengage with the speed changing gear, the speed changing section configured to speed-change inputted power and to output the resultant power via the rotation support shaft. An arrangement is provided for facilitating engagement of the shift gear with the speed changing gear even when respective end faces of the shift gear and the speed changing gear hit each other. A transmission mechanism (20B) is provided for outputting power of a rotation support shaft (24) to a traveling device. The transmission mechanism (20B) has a transmission flexibility portion (80) which allows free rotation of the rotation support shaft (24) by a set rotation angle.

An electric drive axle including a first shaft in driving engagement with an electric motor. A first gear and a second gear are coupled with the first shaft. A second shaft is disposed offset from the first shaft. A third gear is selectively coupled with the second shaft, and the third gear is meshed with the first gear. A fourth gear is selectively coupled with the second shaft, and the fourth gear is meshed with the second gear. A fifth gear is coupled with the second shaft and meshed with a sixth gear coupled with a differential case.

Provided are a seven-speed double clutch transmission and a vehicle. The seven-speed double clutch transmission includes: an outer input shaft and an inner input shaft, a 4/6-speed driving gear and a 2-speed driving gear are sequentially fixed on the outer input shaft, and a 1-speed driving gear, a 3-speed driving gear and a 5/7-speed driving gear are sequentially fixed on the inner input shaft; and a first output shaft and a second output shaft, a 4-speed driven gear, a 2-speed driven gear, a 1-speed driven gear and a 5-speed driven gear, are sequentially fixed on the first output shaft, and a 6-speed driven gear, a reverse gear, a reverse gear synchronizer, a 3-speed driven gear and a 7-speed driven gear are sequentially fixed on the second output shaft.

Methods and systems for an electric drive axle of a vehicle are provided. A gear train in an electric drive axle system includes, in one example, an input shaft configured to rotationally couple to an electric motor-generator and including a first gear and an intermediate shaft including a second gear rotationally coupled to the first gear and a third gear and a fourth gear each configured to rotationally couple to a separate gear on an output shaft. In this example, the second gear, the third gear, and the fourth gear have different sizes, the third gear includes an axial extension having at outer surface, and an interior surface of the second gear circumferentially surrounds at least a portion of the outer surface of the axial extension.

The invention relates to a transmission structure for a hybrid vehicle with an internal combustion engine, a first electric machine, and a second electric machine. In this case, a first electric machine shaft which is assigned to the first electric machine can be driven by a drive shaft which can be driven by the internal combustion engine via a first gear set. In this case, a travel drive gear of a differential gearing of the vehicle can be driven by a second electric machine shaft assigned to the second electric machine via a second gear set. The transmission structure can thereby be compactly designed and in particular, the use of the installation space and/or the efficiency of the electric machines can be improved in that the first gear set has a ring gear with inner teeth and a spur gear which engages with the inner teeth of the ring gear.

Provided is a truck with a lowerable bed for reducing the height difference between the ground and a payload area to provide easy loading and unloading. A traction system for a truck with a lowerable bed is also provided.

A system for a vehicle is disclosed. The system comprises a gear box. The gear box comprises a first shaft coupled to a first motor and a second shaft coupled to the second motor and a third shift. Each shaft extends through a respective pinion. The gearbox has a first shifter for the first motor and a second shifter for the second motor. The shifters are configured to selectively engage a respective pinion to an appropriate shaft as needed. The gear box further comprises a fourth shaft extending through a first gear and a second gear and an other pinion. The first gear meshes with a first pinion. The second gear meshes with a second pinion. The other pinion meshes with a third pinion and a fourth gear. A differential is mechanically coupled to the fourth gear and a left axle shaft and a right axle shaft.

Methods and systems for an electric drive axle of a vehicle are provided. A gear train in an electric drive axle system includes, in one example, an input shaft configured to rotationally couple to an electric motor-generator and including a first gear and an intermediate shaft including a second gear rotationally coupled to the first gear and a third gear and a fourth gear each configured to rotationally couple to a separate gear on an output shaft. In this example, the second gear, the third gear, and the fourth gear have different sizes, the third gear includes an axial extension having at outer surface, and an interior surface of the second gear circumferentially surrounds at least a portion of the outer surface of the axial extension.