IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0189993
(2005-07-27)
|
등록번호 |
US-7431123
(2008-10-07)
|
우선권정보 |
JP-11-14919(1999-01-22); JP-11-14920(1999-01-22); JP-11-174647(1999-06-21) |
발명자
/ 주소 |
- Irikura,Koji
- Ishii,Norihiro
- Ohashi,Ryota
- Takada,Kenichi
- Kawada,Hirohiko
- Abend,Robert
- Andrews,Keith J.
- Hasegawa,Toshiyuki
- Shimizu,Hiroaki
|
출원인 / 주소 |
- Kanzaki Kokyukoki Mfg. Co., Ltd.
|
대리인 / 주소 |
Sterne, Kessler, Goldstein & Fox, P.L.L.C.
|
인용정보 |
피인용 횟수 :
10 인용 특허 :
99 |
초록
▼
A vehicle including an integral transaxle apparatus with axles, a driving hydrostatic transmission (HST), a steering HST, and a differential unit. Driving operating means for slanting operation of a first movable swash plate of the variable displacement driving hydraulic pump for switching the trave
A vehicle including an integral transaxle apparatus with axles, a driving hydrostatic transmission (HST), a steering HST, and a differential unit. Driving operating means for slanting operation of a first movable swash plate of the variable displacement driving hydraulic pump for switching the travelling direction between forward and backward and for changing the travelling speed, and steering operating means for slanting operation of a second movable swash plate of the variable displacement steering hydraulic pump so as to determine the leftward and rightward cornering angle are provided. The steering hydraulic motor has a third movable swash plate interlocking with the driving operating means so that the slanting direction of the third movable swash plate is changed according to the operation of the driving operating means, whereby the vehicle turns laterally in the same direction in response to the steering operating means whether the vehicle travels forward or backward.
대표청구항
▼
What is claimed is: 1. An integral hydrostatic transaxle apparatus for driving and steering a vehicle, comprising: a housing; a pair of axles disposed in said housing; a pair of planetary gear units disposed in said housing for differentially connecting said axles with each other wherein said plane
What is claimed is: 1. An integral hydrostatic transaxle apparatus for driving and steering a vehicle, comprising: a housing; a pair of axles disposed in said housing; a pair of planetary gear units disposed in said housing for differentially connecting said axles with each other wherein said planetary gear units include a driving input part and a steering input part; a first hydrostatic transmission disposed in said housing and operably connected to said driving input part of said planetary gear units for steplessly driving said pair of axles, said first hydrostatic transmission including a first hydraulic pump, a first hydraulic motor and a first center section fluidly connecting said first pump and said first motor; a second hydrostatic transmission disposed in said housing and operably connected to said steering input part of said planetary gear units for accelerating one of said pair of axles and decelerating the other of said pair of axles, said second hydrostatic transmission including a second hydraulic pump, a second hydraulic motor and a second center section fluidly connecting said second pump and said second motor, wherein said housing comprises a first part and a second part joined together along a joint surface and defining a contiguous interior space, wherein said first and second hydrostatic transmissions, said pair of planetary gear units, and said pair of axles are disposed in the interior space; and a pair of first and second transmission shafts disposed in parallel to said pair of axles so as to be supported in said housing, wherein said first transmission shaft includes a first connection portion for connecting said driving input part of said planetary gear units to said first hydraulic motor, wherein said second transmission shaft includes a second connection portion for connecting said steering input part of said planetary gear units to said second hydraulic motor, and wherein said second connecting portion includes a pair of gear trains, each of which is interposed between each of said driven gears and said steering input part of said planetary gear units, wherein each of said gear trains is partly disposed relatively rotatably on said first transmission shaft. 2. The integral hydrostatic transaxle apparatus as set forth in claim 1, wherein a portion of said first center section is plate shaped, on which said first hydraulic pump and motor are mounted so as to have parallel rotary axes in perpendicular to said axles, and wherein said first connection portion includes bevel gears. 3. The integral hydrostatic transaxle apparatus as set forth in claim 1, wherein a portion of said second center section is plate shaped, on which said second hydraulic pump and motor are mounted so as to have parallel rotary axes in perpendicular to said axles, and wherein said second connection portion includes bevel gears. 4. The integral hydrostatic transaxle apparatus as set forth in claim 3, wherein a portion of said first center section is plate shaped, on which said first hydraulic pump and motor are mounted so as to have parallel rotary axes in perpendicular to said axles, and wherein said first connection portion includes bevel gears. 5. The integral hydrostatic transaxle apparatus as set forth in claim 1, wherein the first part and the second part of the housing are joined together along a substantially horizontal joint surface relative to a ground surface. 6. The integral hydrostatic transaxle apparatus as set forth in claim 1, wherein said first and second center sections are disposed in said housing so that said first pump and said first motor mounted on said first center section are aligned in a first direction, and said second pump and said second motor mounted on said second center section are aligned in a second direction which is perpendicular to the first direction. 7. An integral hydrostatic transaxle apparatus for driving and steering a vehicle, comprising: a housing; a pair of axles disposed in said housing; a pair of planetary gear units disposed in said housing for differentially connecting said axles with each other wherein said planetary gear units include a driving input part and a steering input part; a first hydrostatic transmission disposed in said housing and operably connected to said driving input part of said planetary gear units for steplessly driving said pair of axles, said first hydrostatic transmission including a first hydraulic pump, a first hydraulic motor and a first center section fluidly connecting said first pump and said first motor; a second hydrostatic transmission disposed in said housing and operably connected to said steering input part of said planetary gear units for accelerating one of said pair of axles and decelerating the other of said pair of axles, said second hydrostatic transmission including a second hydraulic pump, a second hydraulic motor and a second center section fluidly connecting said second pump and said second motor; and a pair of first and second transmission shafts disposed in parallel to said pair of axles so as to be supported in said housing, wherein said first transmission shaft is disposed nearer to said pair of axles than is said second transmission shaft, wherein said first transmission shaft includes a first connection portion for connecting said driving input part of said planetary gear units to said first hydraulic motor, and wherein said second transmission shaft includes a second connection portion for connecting said steering input part of said planetary gear units to said second hydraulic motor, wherein a portion of said second center section is plate shaped, on which said second hydraulic pump and motor are mounted so as to have parallel rotary axes in perpendicular to said axles, and wherein said second connection portion includes bevel gears, wherein said bevel gears include a drive gear and a pair of driven gears, wherein said drive gear is disposed toward said second hydraulic motor, and wherein said pair of driven gears are relatively rotatably disposed on said second transmission shaft, and mesh with said drive gear so as to be rotated in opposite directions to each other, and wherein said second connection portion further includes a pair of gear trains, each of which is interposed between each of said driven gears and said steering input part of said planetary gear units, wherein each of said gear trains is partly disposed relatively rotatably on said first transmission shaft. 8. The integral hydrostatic transaxie apparatus as set forth in claim 7, wherein a portion of said first center section is plate shaped, on which said first hydraulic pump and motor are mounted so as to have parallel rotary axes in perpendicular to said axles, and wherein said first connection portion includes bevel gears. 9. An integral hydrostatic transaxle apparatus for driving and steering a vehicle, comprising: a housing; a pair of axles disposed in said housing; a pair of planetary gear units disposed in said housing for differentially connecting said axles with each other wherein said planetary gear units include a driving input part and a steering input part; a first hydrostatic transmission disposed in said housing and operably connected to said driving input part of said planetary gear units for steplessly driving said pair of axles, said first hydrostatic transmission including a first hydraulic pump, a first hydraulic motor and a first center section fluidly connecting said first pump and said first motor; and a second hydrostatic transmission disposed in said housing and operably connected to said steering input part of said planetary gear units for accelerating one of said pair of axles and decelerating the other of said pair of axles, said second hydrostatic transmission including a second hydraulic pump, a second hydraulic motor and a second center section fluidly connecting said second pump and said second motor, wherein an interior space of said housing is divided into a first chamber containing said pair of planetary gear units and a second chamber containing said first and second hydrostatic transmissions.
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