JP2018105476A5 - - Google Patents

Claims (6)

A transmission case;
An input shaft housed in the transmission case and to which power is transmitted from the internal combustion engine;
A clutch housed in the transmission case, capable of transmitting power between the internal combustion engine and the input shaft, and capable of interrupting transmission and a shift and select shaft for performing a shift operation;
A transmission unit that is attached to an outer wall of the transmission case, and that performs a shift by automatically operating the clutch and the shift and select shaft;
The transmission unit includes a hydraulic pressure generating device, a clutch operating device that operates the clutch by the hydraulic pressure generated by the hydraulic pressure generating device, and a shift direction and a select direction of the shift and select shaft by the hydraulic pressure generated by the hydraulic pressure generating device. An automatic transmission comprising a shift and select operating device that operates in a direction, and a base plate that fixes the hydraulic pressure generating device and the shift and select operating device to an outer wall of the transmission case,
The clutch operating device is installed on the input shaft, and a clutch release member that operates the clutch by hydraulic pressure generated by the hydraulic pressure generating device; a hydraulic pipe that connects the clutch release member and the hydraulic pressure generating device; With
The automatic transmission according to claim 1, wherein the base plate includes a hydraulic oil supply unit that supplies hydraulic oil to the hydraulic piping from the hydraulic pressure generator. The transmission case includes a clutch housing that houses the clutch, and a transmission case that is adjacent to the clutch housing and houses the shift and select shaft.
When viewed the automatic transmission from the axial direction of said input shaft, said clutch housing has a bulge bulge out outside the vertical wall extending in the vertical direction of the transmission case,
The base plate has an extending portion that extends outward from the outer wall of the transmission case and extends to the side of the bulging portion;
The automatic transmission according to claim 1, wherein the hydraulic pressure generating device and the hydraulic oil supply unit are installed in the extending part. The base plate is formed in a plate shape extending in a predetermined direction and is installed on the upper part of the transmission case,
The extending portion is configured from an end portion in the extending direction of the base plate and extends outward from the vertical wall of the transmission case,
The hydraulic oil supply section is provided on the lower surface side of the extension section,
Below the extension, an opening is formed in the clutch housing,
The automatic transmission according to claim 2, wherein the hydraulic pipe is introduced into the clutch housing through the opening.   4. The automatic transmission according to claim 2, wherein an area occupied by the hydraulic pressure generating device on the base plate is largest on an upper surface side of the extending portion. 5. The transmission case contains a counter shaft connected to the input shaft via a transmission gear, and a final gear to which power of the counter shaft is transmitted,
5. The automatic transmission according to claim 2, wherein the counter shaft and the final gear are disposed on the opposite side of the shift and select shaft with respect to the input shaft. Machine. The counter shaft is composed of a first counter shaft and a second counter shaft,
The transmission gear is composed of a first transmission gear that connects the first counter shaft and the input shaft, and a second transmission gear that connects the second counter shaft and the input shaft. The automatic transmission according to claim 5, wherein: