Axle driving apparatus
OwnerNorihiro Ishiiinventor
Life of this patent
Estimating the term…
Abstract
An axle driving apparatus consisting of a housing for compactly housing inner portions of axles, a hydrostatic transmission, and a transmitting mechanism for transmitting power to the axles from an output shaft of the hydrostatic transmission. The housing is partitioned by an internal wall into a chamber containing the hydrostatic transmission and a chamber containing the other transmitting mechanisms. The housing is filled with oil in common with both chambers. A trunnion for changing the output rotation of the hydrostatic transmission is disposed in parallel to the axles. A shock absorber is provided to prevent abrupt speed change. A differential locking device is attached to the differential gear to thereby improve the straightforward running capacity of the vehicle.
Claims3
An axle driving apparatus for a vehicle comprising:
- a hydrostatic transmission including an input means, a hydraulic pump driven by said input means, a hydraulic motor driven by pressurized oil from said hydraulic pump, and an output means driven by said hydraulic motor;
- an axle;
- a drive train for connecting in a driving manner said output means of said hydrostatic transmission with said axle, wherein said output means, said drive train and said axle have respective rotary axes in parallel to one another;
- and
- a housing containing said hydrostatic transmission, said axle, and said drive train, said housing being dividable into a first housing member and a second housing member,
- wherein an open surface defining a plane is formed in each of said first and second housing members, and said open surface is larger than the greatest diameter of a movable swash plate in rotation;
- wherein said hydraulic pump is provided with a cylinder block, containing a plurality of reciprocally movable pistons and having a rotary axis substantially perpendicular to said rotary axis of said axle, said movable swash plate for receiving thrust from the heads of such pistons, and a means for slantingly rotatably supporting said movable swash plate in said housing;
- wherein said means for slantingly rotatably supporting said movable swash plate includes a first trunnion and a second trunnion provided coaxially at respective opposite sides of said movable swash plate in substantially parallel to said axle, said first trunnion is rotatably supported by said first housing member and is extended outwardly from said first housing member to be fixed on an arm linked with a speed changing member equipped on said vehicle, and said second trunnion is rotatably supported by said second housing member;
- and
- wherein a biasing mechanism, which automatically returns said movable swash plate to the neutral position when said arm is released from an operational force, is interposed either between said first trunnion and said first housing member or between said second trunnion and said second housing member.
Dependencies are inferred from the claim text.