IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0051832
(2008-03-19)
|
등록번호 |
US-8181731
(2012-05-22)
|
우선권정보 |
JP-2007-234293 (2007-09-10) |
발명자
/ 주소 |
- Bessho, Hiroki
- Horiuchi, Yoshifumi
- Shimada, Hiroshi
- Komatsu, Takafumi
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
5 인용 특허 :
3 |
초록
▼
A drive train for a work vehicle comprises: an engine mounted to a vehicle body such that an output shaft of the engine extends in a lateral direction of the vehicle body; a hydrostatic transmission having a pump shaft, a motor shaft, and a housing, the hydrostatic transmission being mounted to the
A drive train for a work vehicle comprises: an engine mounted to a vehicle body such that an output shaft of the engine extends in a lateral direction of the vehicle body; a hydrostatic transmission having a pump shaft, a motor shaft, and a housing, the hydrostatic transmission being mounted to the vehicle body such that the pump shaft and the motor shaft extend in the lateral direction; a mechanical transmission having a plurality of transmission shafts each of which extends in the lateral direction. A pump side portion of the housing of the hydrostatic transmission is connected to an end plate of the engine and a motor side portion of the housing is connected to a casing of the mechanical transmission so that the housing extends from the engine to the mechanical transmission.
대표청구항
▼
1. A drive train for a work vehicle comprising: an engine mounted to a vehicle body such that an output shaft of the engine extends in a lateral direction of the vehicle body;a hydrostatic transmission having a pump shaft, a motor shaft, and a housing, the pump shaft being coupled to the output shaf
1. A drive train for a work vehicle comprising: an engine mounted to a vehicle body such that an output shaft of the engine extends in a lateral direction of the vehicle body;a hydrostatic transmission having a pump shaft, a motor shaft, and a housing, the pump shaft being coupled to the output shaft of the engine, the hydrostatic transmission being mounted to the vehicle body such that the pump shaft and the motor shaft extend in the lateral direction; anda mechanical transmission having a plurality of transmission shafts and being covered by a transmission case and mounted to the vehicle body such that each of the transmission shafts extends in the lateral direction, the plurality of the transmission shafts including an input shaft connected to the motor shaft of the hydrostatic transmission;wherein the hydrostatic transmission includes a port block connected to the transmission case, the port block having a first side extending adjacent the engine and a second side extending opposite from and parallel to the first side,the housing of the hydrostatic transmission includes a first case for covering a hydraulic pump of the hydrostatic transmission, a second case for covering a primary hydraulic motor of the hydrostatic transmission, and a third case for covering an auxiliary hydraulic motor of the hydrostatic transmission, in which the first case is connected to the second side of the port block, the second case is connected to the transmission case and the first side of the port block, and the third case is connected to the second side of the port block. 2. A drive train in accordance with claim 1, further comprising: a flat gear provided between one of the transmission shafts of the mechanical transmission and an axle of a wheel of the work vehicle. 3. A drive train in accordance with claim 1, wherein the transmission case includes a left-side first case and a right-side second case connected to each other, thereby forming a housing space for housing the transmission and a differential device for rear wheels, the right-side second case having a protrusion integrally formed therewith extending from an input unit of the mechanical transmission toward an output unit of the engine, wherein the left-side first case is on a left-side of the work vehicle when viewed from behind the work vehicle and the right-side second case is on a right-side of the work vehicle when viewed from behind the work vehicle. 4. A drive train in accordance with claim 3, wherein the protrusion has a first case portion for covering a flywheel and an output gear provided in the engine, a second case portion for covering an input gear provided in the pump shaft, and a third case portion for covering the primary hydraulic motor of the hydrostatic transmission. 5. A drive train in accordance with claim 4, wherein the port block also serves as right-side walls of the transmission case, thereby forming a housing space between the port block and the right-side second case of the mechanical transmission for housing the input gear meshed with the output gear of the engine. 6. A drive train for a work vehicle comprising: an engine mounted to a vehicle body such that an output shaft of the engine extends in a lateral direction of the vehicle body;a hydrostatic transmission having a pump shaft, a motor shaft, and a housing, the pump shaft being coupled to the output shaft of the engine, the hydrostatic transmission being mounted to the vehicle body such that the pump shaft and the motor shaft extend in the lateral direction;a mechanical transmission having a plurality of transmission shafts, each of the transmission shafts extending in the lateral direction, the plurality of the transmission shafts including an input shaft connected to the motor shaft of the hydrostatic transmission; anda transmission case for covering the mechanical transmission,wherein the hydrostatic transmission includes a port block connected to the transmission case, the port block being in the form of a plate having a first side extending adjacent the engine and a second side extending opposite from and parallel to the first side, andthe housing of the hydrostatic transmission includes: a first case for covering a hydraulic pump of the hydrostatic transmission, the first case being connected to the second side of the port block;a second case for covering a primary hydraulic motor of the hydrostatic transmission, the second case having one end thereof connected to the transmission case and the other end thereof connected to the first side of the port block, an inner wall of the second case cooperating with the port block to define a boundary of a housing space of the primary hydraulic motor, an outer wall of the second case cooperating with the transmission case to define a boundary of a housing space of the mechanical transmission; anda third case for covering an auxiliary hydraulic motor of the hydrostatic transmission, the third case being connected to the second side of the port block. 7. The drive train in accordance with claim 6, wherein the second case is provided integral with the transmission case to form a portion of the transmission case.
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