HST and transmission
AssigneeKanzaki Kokyukoki Mfg. Co., Ltd.
InventorsKazuhiro Owada, Koji Iwaki, Kengo Sasahara
Life of this patent
Estimating the term…
Abstract
In a transmission of the present invention, a transmission case has a peripheral wall with an opening sized to allow an HST to be other than a main plate of the HST. The HST has the main plate and a sub-plate sandwiching members out of a center section, a pump-side holder and a motor-side holder that face to each other with the pump main body and the motor main body being arranged between the members. The sub-plate has an engaging portion, and the transmission case has a mounting seat with which the engaging portion is engaged in a slidable manner so that the HST is guided until an installation position.
Claims9
A transmission that speed-changes rotational power operatively input from a drive source, the transmission comprising:
- a transmission case;
- and
- an HST arranged at a predetermined installation position within the transmission case,
- wherein the HST includes a pump shaft, a pump main body supported by the pump shaft in a relatively non-rotatable manner around an axial line with respect to the pump shaft, a pump-side holder supporting the pump shaft in a rotatable manner around the axial line, a motor shaft, a motor main body supported by the motor shaft in a relatively non-rotatable manner around an axial line with respect to the motor shaft, a motor-side holder that supporting the motor shaft in a rotatable manner around the axial line, 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 sandwiching members out of the center section, the pump-side holder and the motor-side holder that face to each other in a state that the pump main body and the motor main body are arranged between the members,
- 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 HST is configured so that the main plate is detachably connected to an outer surface of the peripheral wall of the transmission case in a state where the HST is arranged at the installation position,
- wherein the sub-plate is provided with an engaging portion, and
- wherein the transmission case is provided with a mounting seat with which the engaging portion is engaged in a slidable manner so that the HST is guided until the installation position.
An HST comprising:
- a pump shaft;
- a pump main body supported by the pump shaft in a relatively non-rotatable manner 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 holder supporting the pump-side swash plate and also supporting the pump shaft in a rotatable manner around the axial line;
- a motor shaft;
- a motor main body supported by the motor shaft in a relatively non-rotatable manner 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 supporting the motor-side swash plate and also supporting the motor shaft in a rotatable manner around the axial line;
- a center section formed with oil paths fluidly connecting the pump main body and the motor main body;
- and
- a main plate and a sub-plate sandwiching members out of the center section, the pump-side holder and the motor-side holder that face to each other in a state that the pump main body and the motor main body are arranged between the members,
- wherein the main plate includes a main-plate-side main body portion facing an installation space of the center section, the pump-side swash plate holder and the motor-side swash plate holder, and an extended region extending outward in a planar direction from the main-plate-side main body portion, and
- wherein the sub-plate includes a sub-plate-side main body portion cooperating with the main-plate-side main body portion so as to sandwich the members out of the center section, the pump-side holder and the motor-side holder that face to each other in a state that the pump main body and the motor main body are arranged between the members, and an engaging portion extending outward in a planar direction from the sub-plate-side main body portion.
Dependencies are inferred from the claim text.