摘要:
A power transmission apparatus for a working vehicle has substantially symmetrically disposed first and second transaxles (2), each of which supports a single axle (2), and a working apparatus driving power take-off device (P1,P2) including an input member (26). A gear casing (20) is spanned between the first and second transaxles (2). A primary drive shaft (23) is disposed in the gear casing (20) so as to be drivingly connected to a prime mover (203). A traveling drive train is disposed in the gear casing (20) so as to drivingly connect the primary drive shaft (23) to the input shafts of the respective transaxles (2). A working apparatus drive train is disposed in the gear casing (20) so as to drivingly connect the primary drive shaft (23) to the input member (26) of the working apparatus driving power take-off device (P1,P2).
摘要:
A differential gear assembly (1) comprises: a disc-shaped input gear (2) receiving drive force and having a central portion (9), an outer portion around the central portion, and one or more open space portions (2a,2b,2c), formed between the central portion and the outer portion; a pair of output shafts (3,3') extending in opposite directions along the axis of the input gear (2) and one end of each of the output shafts being loosely fitted in a central bore (9A) formed in the central portion of the input gear; a pair of side bevel gears (4,4') each of which is fixedly attached near the end of each output shaft (3,3') closer to the input gear; one or more support shafts (9B,9B') extending radially from the central portion into the open space portions of the input gear; one or more bevel pinions (5,5') rotatably supported on the one or more support shafts, respectively, to mesh with the pair of side bevel gears; and friction mechanism (6,6',7,7',8,8') located in at least one of said one or more open space portions that permits the bevel pinion to rotate with rotational resistance. A limited slip effect is provided without using a casing-shaped ring gear, whereby the resulting assembly can be compact and less costly.
摘要:
A transmission system for a motor vehicle includes a hydrostatic transmission (7), comprising a hydraulic pump (20) driving a variable speed hydraulic motor (21), mounted on the front of a transmission case (8). The vehicle is driven by either the rear or all four wheels, as required, from the hydraulic motor shaft (22) through change speed gearing (43). Front and rear PTO shafts (19, 17), for driving auxiliary machinery, extend from the lower and middle portions of the transmission case (8) respectively. They are driven by the hydraulic pump shaft (23) through selecting clutches (31, 36) and change speed gearing (32) in the case of the rear PTO shaft (17), located in the upper portion of the transmission case (8) above the rear wheel drive assembly. By this distribution of power transmission between the pump and motor shafts (23, 22) the system is made shorter in length and generally more compact.
摘要:
An improved differential unit (101) for an integrated hydrostatic transmission (IHT) is provided. The differential unit comprises an input gear (200), a cross-shaft (202) disposed within a central opening of the input gear, and a pair of clutch members (204L,204R) disposed coaxial with the input gear. One of each clutch member is disposed on opposite sides of the cross-shaft. A first plurality of friction members (208) extend from each clutch member. The differential unit also comprises a pair of side couplings (210L,210R), each coaxially disposed within one of the clutch members, and a second plurality of friction members (212) extending from each side coupling. Each clutch member includes a cam surface (206) that comes in contact with the cross-shaft when the differential unit is under normal operating conditions. Alternative embodiments are also described herein.
摘要:
A steerable hydraulic transaxle (15) comprises: a kingpin (26) relatively rotatably supported by a vehicle chassis (14); a housing (28) fixed to the kingpin (26); a single axle (35) disposed in the housing (28); a single wheel (36) fixed onto the single axle (15) out of the housing (28); and a hydraulic motor (10) disposed in the housing (28) so as to drive the single axle (15). A hydraulic transaxle comprises a transaxle casing for supporting left and right axles, a pair of hydraulic motors (10) disposed in the transaxle casing so as to drive the respective left and right axles (15), hydraulic ports provided in the transaxle casing so as to fluidly connect the pair of hydraulic motors (10) in parallel to a common hydraulic pump (5), and a system for restricting or canceling differential rotation of the pair of hydraulic motors.
摘要:
A transmission (30) for a self-propelled walking lawn mower is disclosed, the transmission comprising:
i) a casing (33); ii) input and output shafts (31,34) supported by the casing, the output shaft (34) driving ground engaging wheels of the mower and the input shaft (31) receiving drive force from an engine (11) of the mower wherein the input shaft extends substantially perpendicular to the output shaft and is located almost directly above the output shaft; iii) A drive gear (38) secured on the input shaft; iv) a driven gear (40) rotatably mounted on the output shaft and meshing with the drive gear; and v) a clutch for transmitting the rotation of the driven gear to the output shaft.