초록 ▼

A power-dividing device for a working vehicle includes a case member, an input shaft supported by the case member so that a first end portion of the input shaft can be operatively connected to a driving source, a PTO unit having a PTO shaft supported by the case member so as to be offset with respec

A power-dividing device for a working vehicle includes a case member, an input shaft supported by the case member so that a first end portion of the input shaft can be operatively connected to a driving source, a PTO unit having a PTO shaft supported by the case member so as to be offset with respect to the input shaft, a power transmission mechanism accommodated in the case member to transmit power from the input shaft to the PTO shaft, and a first pump unit having a first pump shaft operatively connected to the input shaft and being fluid-connected to an actuator disposed outside.

대표청구항 ▼

The invention claimed is: 1. An axle-driving device comprising: an axle case including an outer wall supporting a drive axle in a rotatable manner about its axis and an inner wall separated inward in a vehicle width direction from the outer wall so that an inner end portion of said drive axle in th

The invention claimed is: 1. An axle-driving device comprising: an axle case including an outer wall supporting a drive axle in a rotatable manner about its axis and an inner wall separated inward in a vehicle width direction from the outer wall so that an inner end portion of said drive axle in the vehicle width direction is positioned between said outer wall and the inner wall; a motor unit which forms a non-stepwisely changeable transmission in cooperation with an actuator disposed at a distance, the motor unit including a motor shaft supported by the inner wall in a rotatable manner about its axis so that an outer end portion of the motor shaft in the vehicle width direction is positioned in an accommodating space in said axle case such that in the vehicle width direction the outer end portion of the motor shaft is positioned further inward than the inner end portion of the drive axle, and a motor main body supported by said inner wall; a reduction power transmission unit which includes an output gear supported on the outer end portion of said motor shaft in the vehicle width direction so as to be non-rotatable with respect to the motor shaft, a final gear supported on the inner end portion of said drive axle in the vehicle width direction so as to be non-rotatable with respect to the drive axle, and a gear train for reducing a speed of and transmitting power from said output gear to said final gear and including an intermediate shaft supported by said axle case so as to be positioned above said motor shaft; a brake unit for selectively applying a braking force to said intermediate shaft based on operation from outside; and a mounting stay having a proximal end portion coupled to a body frame of the vehicle and a distal end portion supporting said axle case, in which said motor main body is connected to the inner wall of the axle case so that at least a portion of said motor main body overlaps with said final gear when viewed along an axial direction of said drive axle, said mounting stay is formed so as to define a surrounded space between the inner wall of said axle case and said body frame, the surrounded space having a size that allows said motor main body to be positioned therein while at least an upper side thereof is opened upward, said intermediate shaft is supported by the axle case so as to have an inner end portion in the vehicle width direction that is positioned above the motor shaft and extended into the surrounded space, and said brake unit is supported by the inner wall of said axle case so as to act on the inner end portion of the intermediate shaft, so that said brake unit is positioned between the inner wall and the body frame by utilizing a space of the surrounded space that is positioned above said motor main body. 2. An axle-driving device as set forth in claim 1, in which said brake unit includes a rotary member supported on said intermediate shaft in a non-rotatable manner, a fixed member supported by said axle case, a friction braking device which has a pair of friction discs respectively supported by said rotary member and said fixed member in a non-rotatable manner and which selectively applies a braking force to said rotary member based on operation from outside, and an operating arm for operating said friction braking device by swinging about a pivot axis disposed in parallel to said intermediate shaft, and said operating arm can be operated from the upper opening of said surrounded space. 3. An axle-driving device as set forth in claim 2, in which said motor unit is formed so that a connection portion to said actuator is oriented upward at a position between said operating arm of said brake unit and said body frame. 4. An axle-driving device as set forth in claim 3, in which said actuator is a hydraulic pump unit, said motor unit is a hydraulic motor unit fluid-connected to said hydraulic pump unit through a flow path so as to form an HST in cooperation with the hydraulic pump unit, and said hydraulic motor unit has a center section formed with an oil path which forms a portion of said flow path and a first end portion of which forms said connection portion to the actuator. 5. A vehicle comprising: a body frame including a pair of main frames disposed along a vehicle back and forth direction; an engine supported on the body frame; a power-dividing device including a pair of hydraulic pump units operatively connected to an output portion of the engine; a pair of drive axles; and a pair of axle-driving devices respectively and independently driving the pair of drive axles, in which each of said pair of axle-driving devices includes an axle case, a hydraulic motor unit, a reduction power transmission unit, a brake unit and a mounting stay, said axle case has an outer wall supporting the corresponding drive axle in a rotatable manner and an inner wall separated inward in a vehicle width direction from said outer wall so that an inner end portion of the drive axle in the vehicle width direction is positioned between the outer wall and the inner wall, the axle case being supported by the corresponding main frame, said hydraulic motor unit is fluid-connected to the corresponding hydraulic pump unit through a flow path so as to form an HST, the hydraulic motor unit including a motor shaft supported by said inner wall in a rotatable manner so that an outer end portion of the motor shaft in the vehicle width direction is positioned in an accommodating space in said axle case such that in the vehicle width direction the outer end portion of the motor shaft is positioned further inward than the inner end portion of the drive axle and a motor main body supported by said inner wall, a reduction power transmission unit includes an output gear supported on an outer end portion of said motor shaft in the vehicle width direction in a non-rotatable manner, a final gear supported on an inner end portion of said drive axle in the vehicle width direction in a non-rotatable manner, and a gear train for reducing a speed of and transmitting power from said output gear to said final gear, the gear train including an intermediate shaft supported by said axle case so as to be positioned above said motor shaft, said brake unit is formed to selectively apply a braking force to said intermediate shaft based on operation from outside, said hydraulic motor main body is connected to the inner wall of the axle case so that at least a portion of the motor main body overlaps with said final gear when viewed along an axial direction of said drive axle, said mounting stay has a proximal end portion coupled to the body frame and a distal end portion supporting the axle case, and defines a surrounded space between the inner wall of said axle case and said body frame, the surrounded space having a size that allows said motor main body to be positioned therein while at least an upper side thereof is opened upward, said intermediate shaft is supported by the axle case so as to have an inner end portion in the vehicle width direction that is positioned above the motor shaft and extended into the surrounded space, and said brake unit is supported by the inner wall of said axle case so as to act on the inner end portion of the intermediate shaft, so that said brake unit is positioned between the inner wall and the body frame by utilizing a space of the surrounded space that is positioned above said hydraulic motor main body. 6. A vehicle as set forth in claim 5, in which said brake unit includes a rotary member supported on said intermediate shaft in a non-rotatable manner, a fixed member supported by said axle case, a friction braking device which has friction discs respectively supported by said rotary member and said fixed member in a non-rotatable manner and which selectively applies a braking force to said rotary member based on operation from outside, and an operating arm for operating said friction braking device by swinging about a pivot axis disposed in parallel to said intermediate shaft, and said operating arm can be operated from the upper opening of said surrounded space. 7. A vehicle as set forth in claim 6, in which said hydraulic motor unit has a center section formed with an oil path forming a portion of said flow path between said hydraulic pump unit and the hydraulic motor unit, and said oil path opens upward at a position between said operating arm in said brake unit and said main frame.