摘要:
A modular hydrostatic transaxle (8) includes an axle module (12) removably connected to a hydrostatic transmission module (10). The axle module includes a differential connected to a reduction gear train and disposed in an axle casing (18). A pair of axles (20, 22) are connected to the differential and supported within the axle casing. The hydrostatic transmission module (10) comprises a transmission casing (78) separate from the axle casing (18) and hydraulically connected pump (169) and motor (138) disposed in the transmission casing. The motor output connection includes a shaft (26) piloted to an input drive (32) of the reduction gear train, which constitutes the alignment mechanism of the transmission and axle modules. The pump and motor cylinder barrels (116, 140) are hydraulically connected through the pump and motor block (90) at 90 °orientation, and a portion of the pump and motor block forms an inclined surface (184) which supports a face of a thrust bearing (186). At least one homogeneous low friction bearing strip (216) is confined between the swash plate (130) and the interior portion of the casing. A disconnect mechanism (30) includes a spring (212) that urges a sleeve to engage the output and input shafts. The brake disc (64) is disposed on a distal end of the output shaft and a brake cover (74) is fastened to the outer portion of the axle casing and substantially encloses the brake disc.
摘要:
A modular hydrostatic transaxle (8) includes an axle module (12) removably connected to a hydrostatic transmission module (10). The axle module includes a differential connected to a reduction gear train and disposed in an axle casing (18). A pair of axles (20, 22) are connected to the differential and supported within the axle casing. The hydrostatic transmission module (10) comprises a transmission casing (78) separate from the axle casing (18) and hydraulically connected pump (169) and motor (138) disposed in the transmission casing. The motor output connection includes a shaft (26) piloted to an input drive (32) of the reduction gear train, which constitutes the alignment mechanism of the transmission and axle modules. The pump and motor cylinder barrels (116, 140) are hydraulically connected through the pump and motor block (90) at 90°orientation, and a portion of the pump and motor block forms an inclined surface (184) which supports a face of a thrust bearing (186). At least one homogeneous low friction bearing strip (216) is confined between the swash plate (130) and the interior portion of the casing. A disconnect mechanism (30) includes a spring (212) that urges a sleeve to engage the output and input shafts. The brake disc (64) is disposed on a distal end of the output shaft and a brake cover (74) is fastened to the outer portion of the axle casing and substantially encloses the brake disc.
摘要:
A modular hydrostatic transaxle (8) includes an axle module (12) removably connected to a hydrostatic transmission module (10). The axle module includes a differential connected to a reduction gear train and disposed in an axle casing (18). A pair of axles (20, 22) are connected to the differential and supported within the axle casing. The hydrostatic transmission module (10) comprises a transmission casing (78) separate from the axle casing (18) and hydraulically connected pump (169) and motor (138) disposed in the transmission casing. The motor output connection includes a shaft (26) piloted to an input drive (32) of the reduction gear train, which constitutes the alignment mechanism of the transmission and axle modules. The pump and motor cylinder barrels (116, 140) are hydraulically connected through the pump and motor block (90) at 90°orientation, and a portion of the pump and motor block forms an inclined surface (184) which supports a face of a thrust bearing (186). At least one homogeneous low friction bearing strip (216) is confined between the swash plate (130) and the interior portion of the casing. A disconnect mechanism (30) includes a spring (212) that urges a sleeve to engage the output and input shafts. The brake disc (64) is disposed on a distal end of the output shaft and a brake cover (74) is fastened to the outer portion of the axle casing and substantially encloses the brake disc.
摘要:
A variable speed transmission (10, 10a) including a housing (12), a drive shaft (44) having an axis of rotation (62) and rotatably supported in the housing, an output shaft (20) having an axis of rotation and rotatably supported in the housing, a first pulley (64, 70) and a second pulley (68, 70) both having a common axis of rotation (61), a third pulley (42, 42a) having an axis of rotation (62) and rotatably attached to the drive shaft, and a belt (40). The output shaft is operatively connected to the drive shaft. The first pulley and the second pulley each have a variable pitch diameter and changes in the first and second pulley variable pitch diameters being inversely proportional. The third pulley and one of the first and the second pulleys are in engagement though the belt.
摘要:
A hydrostatic transmission (34, 35) including a variable displacement pump (56) including an input shaft (40) and a pump cylinder barrel rotatably coupled to the input shaft, the pump cylinder barrel having a plurality of cylinder chambers arranged in parallel with other and distributed about the input shaft axis of rotation. Each cylinder chamber has a reciprocating piston therein which bears against a pivotable swashplate, the displacement of the pump being varied in response to changes in the position of the swashplate. A gerotor motor (66) is attached to the pump and has an output shaft (128). The motor includes an engaged pair of inner (120) and outer (118) members, the outer member being eccentric relative to the inner member. The inner member is rotatably driven relative to the outer member by fluid received between the inner and outer members from the pump, the inner member being drivingly connected to the output shaft. A plurality of fluid conduits (58, 60) extend between the pump to the motor, through which the motor is in fluid communication with the pump.
摘要:
A hydrostatic transaxle including first and second hydrostatic transmission modules and an axle drive housing. Each module includes a transmission housing, a rotating fluid pump and a rotatable fluid motor with the pump being of variable displacement and the motor being rotated at various speeds and in forward and reverse directions in response to changes in pump displacement. The axle drive housing contains first and second gear trains and a pair of axles. One of the axles is operably coupled to the first transmission module motor through the first gear train, and the other of the axles is operably coupled to the second transmission module motor through the second gear train. Each of the hydrostatic transmission module housings is detachably fixed to the axle drive housing.
摘要:
A modular hydrostatic transaxle (8) includes an axle module (12) removably connected to a hydrostatic transmission module (10). The axle module includes a differential connected to a reduction gear train and disposed in an axle casing (18). A pair of axles (20, 22) are connected to the differential and supported within the axle casing. The hydrostatic transmission module (10) comprises a transmission casing (78) separate from the axle casing (18) and hydraulically connected pump (169) and motor (138) disposed in the transmission casing. The motor output connection includes a shaft (26) piloted to an input drive (32) of the reduction gear train, which constitutes the alignment mechanism of the transmission and axle modules. The pump and motor cylinder barrels (116, 140) are hydraulically connected through the pump and motor block (90) at 90°orientation, and a portion of the pump and motor block forms an inclined surface (184) which supports a face of a thrust bearing (186). At least one homogeneous low friction bearing strip (216) is confined between the swash plate (130) and the interior portion of the casing. A disconnect mechanism (30) includes a spring (212) that urges a sleeve to engage the output and input shafts. The brake disc (64) is disposed on a distal end of the output shaft and a brake cover (74) is fastened to the outer portion of the axle casing and substantially encloses the brake disc.
摘要:
A modular hydrostatic transaxle (8) includes an axle module (12) removably connected to a hydrostatic transmission module (10). The axle module includes a differential connected to a reduction gear train and disposed in an axle casing (18). A pair of axles (20, 22) are connected to the differential and supported within the axle casing. The hydrostatic transmission module (10) comprises a transmission casing (78) separate from the axle casing (18) and hydraulically connected pump (169) and motor (138) disposed in the transmission casing. The motor output connection includes a shaft (26) piloted to an input drive (32) of the reduction gear train, which constitutes the alignment mechanism of the transmission and axle modules. The pump and motor cylinder barrels (116, 140) are hydraulically connected through the pump and motor block (90) at 90 °orientation, and a portion of the pump and motor block forms an inclined surface (184) which supports a face of a thrust bearing (186). At least one homogeneous low friction bearing strip (216) is confined between the swash plate (130) and the interior portion of the casing. A disconnect mechanism (30) includes a spring (212) that urges a sleeve to engage the output and input shafts. The brake disc (64) is disposed on a distal end of the output shaft and a brake cover (74) is fastened to the outer portion of the axle casing and substantially encloses the brake disc.
摘要:
An implement (25) having an engine and transaxle module (34) comprises an engine (36, 36') having an output shaft (60), and a transaxle (38, 38') having at least one axle (42, 44) operatively coupled to the output shaft through the transaxle. The implement includes a handle (40) attached to the engine and transaxle module, a ground engaging wheel (46, 48) operatively coupled to each axle, and one of a plurality of interchangeable working devices (29, 29') attached to the engine and transaxle module. Within the implement, the engine and the transaxle are rigidly and directly attached to one another in a vertically stacked orientation.
摘要:
A powertrain module (14) for a zero turn radius vehicle (10), such as a tractor or mower, the powertrain module generally including a structural member (24) or mounting plate to which an engine (30), a pair of hydrostatic transmission modules (26a, 26b), and a pair of axle drive units (28a, 28b) are attached to form a self-contained powertrain module which may be shipped as a single packaged unit for installation into the zero turn radius implement. The mounting plate provides structural rigidity between the powertrain components attached thereto, and the mounting plate of the powertrain module may be attached directly to the frame (12) of the vehicle, or alternatively, may itself serve as a structural frame member for the vehicle.