Patent ID: 11933391
Assignee: KANZAKI KOKYUKOKI MFG. CO., LTD.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  B | IPC F

Claim 10:
11. A transmission that speed-changes rotational power operatively input from a drive source, the transmission comprising:
a transmission case;
an input-side transmission shaft that is operatively connected to the drive source and is supported by the transmission case in a rotatable manner around an axial line;
an input-side transmission gear supported by the input-side transmission shaft in a manner relatively non-rotatable around an axial line with respect to the input-side transmission shaft within the transmission case;
an output-side transmission shaft supported by the transmission case in a rotatable manner around an axial line;
an output-side transmission gear supported by the output-side transmission shaft in a manner relatively non-rotatable manner around an axial line with respect to the output-side transmission shaft within the transmission case; and
an HST,
wherein the HST includes a pump shaft, a pump main body supported by the pump shaft in a manner relatively non-rotatable around an axial line with respect to the pump shaft, a pump-side swash plate defining a capacity of the pump main body, a pump-side swash plate holder that supports a rear surface of the pump-side swash plate and is formed with a through hole through which the pump shaft is passed, a pump-side transmission gear supported by a portion of the pump shaft that extends from a portion passing through the pump-side swash plate holder in a direction away from the pump main body in such a manner that the pump-side transmission gear is relatively non-rotatable around the axial line with respect to the pump shaft, a motor shaft, a motor main body supported by the motor shaft in a manner relatively non-rotatable around an axial line with respect to the motor shaft, a motor-side swash plate defining a capacity of the motor main body, a motor-side swash plate holder that supports a rear surface of the motor-side swash plate and is formed with a through hole through which the motor shaft is passed, a motor-side transmission gear supported by a portion of the motor shaft that extends from a portion passing through the motor-side swash plate holder in a direction away from the motor main body in such a manner that the motor-side transmission gear is relatively non-rotatable around the axial line with respect to the motor shaft, a center section that is formed with oil paths fluidly connecting the pump main body and the motor main body, and a main plate and a sub-plate hold or support the center section, the pump-side swash plate holder and the motor-side swash plate holder in a sandwiched manner by inner surfaces of the main plate and the sub-plate that face each other,

wherein the transmission case has a peripheral wall and an opening formed in the peripheral wall,
wherein the opening is so sized as to allow, in an assembled state of the HST, insertion of components other than the main plate of the HST,
wherein the main plate is detachably connected to an outer surface of the peripheral wall of the transmission case so that the components of the HST other than the main plate is housed within the transmission case via the opening, and
wherein the pump-side transmission gear and the motor-side transmission gear mesh with the input-side transmission gear and the output-side transmission gear, respectively, in accordance with connection of the main plate to the outer surface of the peripheral wall of the transmission case.