초록 ▼

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 ch

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.

대표청구항 ▼

What is claimed is: 1. An axle driving apparatus for a vehicle, comprising; a housing; an axle disposed in said housing; an input means disposed in said housing; a hydraulic pump driven by said input means, wherein said hydraulic pump is provided with a reciprocally movable cylinder block with a

What is claimed is: 1. An axle driving apparatus for a vehicle, comprising; a housing; an axle disposed in said housing; an input means disposed in said housing; a hydraulic pump driven by said input means, wherein said hydraulic pump is provided with a reciprocally movable cylinder block with a plurality of pistons disposed in said cylinder block, said cylinder block having a rotary axis which is substantially perpendicular to a rotary axis of said axle; a movable swash plate for receiving thrust from the heads of said pistons; means disposed on opposite sides of said movable swash plate in said housing for rotatably supporting said movable swash plate and for permitting said movable swash plate to slant along an axis substantially parallel to said axle, said means for rotatably supporting said movable swash plate includes a first trunnion provided at one side of said swash plate having an axis which coincides with a slantingly rotary axis of said swash plate and extends outwardly from a side wall of said housing, and an arm fixed to the outer end of said first trunnion connected with a speed change operating member provided on said vehicle which longitudinally, swingably moves around said slantingly rotary axis; a hydraulic motor driven by pressurized oil from said hydraulic pump; an output means driven by said hydraulic motor; a drive train for drivingly connecting said output means and said axles; and a shock absorber mounted between said arm and said housing for applying operational resistance to said speed change operating member. 2. An axle driving apparatus for a vehicle, comprising: a housing; an axle disposed in said housing; an input means disposed in said housing; a hydraulic pump disposed in said housing and driven by said input means, wherein said hydraulic pump is provided with a reciprocally movable cylinder block with a plurality of pistons disposed in said cylinder block, said cylinder block having a rotary axis which is substantially perpendicular to a rotary axis of said axle; a movable swash plate for receiving thrust from the heads of said pistons; means disposed on opposite sides of said movable swash plate in said housing for rotatably supporting said movable swash plate and for permitting said movable swash plate to slant along an axis substantially parallel to said axle, said means including a pair of first and second coaxial trunnions provided at respective opposite sides of said swash plate, said pair of trunnions having axes coinciding with a slantingly rotary axis of said swash plate; a hydraulic motor disposed in said housing and driven by pressurized oil from said hydraulic pump, id="DEL-S-00007" date="20060905" wherein said hydraulic pump,id="DEL-S-00007" wherein said hydraulic pump is located between said axle and said hydraulic motor when viewed in plan; an output means driven by said hydraulic motor; a drive train for drivingly connecting said output means and said axle, said drive train having a shaft; and a partition wall formed in said housing, said hydraulic pump and said hydraulic motor being disposed at one side of said partition wall, said drive train being disposed at an other side of said partition wall, wherein one end of said shaft of said drive train is supported by said one side of said partition wall, and wherein said first trunnion is supported by said other side of said partition wall. 3. An axle driving apparatus for a vehicle according to claim 2, wherein said housing is provided with a first housing member and a second housing member joined along a plane substantially perpendicular to said rotary axis of said cylinder block, and wherein said movable swash plate is slantingly movably housed in said first housing member. 4. An axle driving apparatus for a vehicle according to claim 2, wherein said second trunnion extends outwardly from a side wall of said housing, and said means for rotatably supporting said movable swash plate further includes: an arm fixed to the outer end of said second trunnion connected with a speed change operating member provided on said vehicle which longitudinally swingably moves around said slantingly rotary axis. 5. An axle driving apparatus for a vehicle according to claim 4, further comprising: a shock absorber mounted between said arm and said housing for applying operational resistance to said speed change operating member. 6. An axle driving apparatus for a vehicle according to claim 4, further comprising: a side plate mounted on one side wall of said first housing member for supporting said first trunnion; and a bias mechanism disposed between said side plate and said movable swash plate for returning said movable swash plate to a neutral position. 7. An axle driving apparatus for a vehicle according to claim 6, further comprising: a cooling fan disposed above said first housing member and integrally rotatable with said input means; and a plurality of fins provided at an outer surface of said side plate and disposed in the direction of the flow of cooling wind generated by said cooling fan. 8. 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 id="DEL-S-00008" date="20060905" raidid="DEL-S-00008" id="INS-S-00008" date="20060905" said id="INS-S-00008" 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 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 id="INS-S-00009" date="20060905" along a first plane perpendicular to said axleid="INS-S-00009" , wherein an opening surface defining said first plane is formed in each of said first and second housing id="DEL-S-00009" date="20060905" memberid="DEL-S-00009" id="INS-S-00010" date="20060905" membersid="INS-S-00010" , and id="INS-S-00011" date="20060905" wherein a height of id="INS-S-00011" said opening surface is larger than the id="DEL-S-00010" date="20060905" greatest diameterid="DEL-S-00010" id="INS-S-00012" date="20060905" largest radius id="INS-S-00012" of said swash plate in rotation; wherein said hydraulic pump is provided with a reciprocally movable cylinder block, containing therein a plurality of pistons and having a rotary axis substantially perpendicular to said rotary axis of said axle, a movable swash plate for receiving thrust from the heads of said pistons, and a means for slantingly rotatably supporting said movable id="DEL-S-00011" date="20060905" awashid="DEL-S-00011" id="INS-S-00013" date="20060905" swash id="INS-S-00013" 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 id="DEL-S-00012" date="20060905" inid="DEL-S-00012" id="INS-S-00014" date="20060905" , said first and second trunnions being id="INS-S-00014" substantially parallel to said axle, said first trunnion id="DEL-S-00013" date="20060905" isid="DEL-S-00013" id="INS-S-00015" date="20060905" being id="INS-S-00015" rotatably supported by said first housing member and id="DEL-S-00014" date="20060905" is extendedid="DEL-S-00014" id="INS-S-00016" date="20060905" extending id="INS-S-00016" outwardly from said first housing member to be fixed to an arm linked with a speed changing member equipped on said vehicle, and said second trunnion id="DEL-S-00015" date="20060905" isid="DEL-S-00015" id="INS-S-00017" date="20060905" being id="INS-S-00017" rotatably supported by said second housing member. 9. An axle driving apparatus for a vehicle according to claim 8, wherein a third housing member is separably joined to said second housing member through a second plane substantially perpendicular with respect to the rotary axis of said cylinder block. 10. An axle driving apparatus for a vehicle according to claim 9, further comprising: a first internal wall portion formed within said second housing member for supporting said second trunnion. 11. An axle driving apparatus for a vehicle according to claim 10, further comprising: a second internal wall portion formed within said third housing member; wherein end surfaces of said first internal wall portion and said second internal wall portion extend toward said second plane, overlapping each other when said second housing member and said third housing member are joined and forming in amid housing a first section for containing therein said hydrostatic transmission and a second section for containing therein said drive train. 12. An axle driving apparatus for a vehicle according to claim 11, further comprising: an intermediate transmitting member disposed between said output means and said axles, said intermediate transmitting member having a rotary axis extending substantially in parallel to said second plane; and a shaft for disposing thereon said intermediate transmitting member, said shaft being sandwiched between said first internal wall portion and said second internal wall portion for support. 13. An axle driving apparatus for a vehicle according to claim 7, further comprising: an internal wall portion formed within said second housing member for supporting said second trunnion.