Output split-type mechanical and hydraulic transmission

Machine element or mechanism – Elements – Gear casings

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Details

F16H 4704

Patent

active

041843851

ABSTRACT:
An output split-type mechanical and hydraulic transmission includes input and output shafts, first and second differential gear mechanisms for establishing different input-output speed ratios, at least two clutch mechanisms for selectively cooperating with components of the differential gear mechanisms and the input and output shafts to establish different input-output speed ratio ranges, and first and second hydraulic pump motors. The first pump motor has a variable hydraulic capacity and is mechanically and drivably connected to the input shaft for establishing variations in the hydraulic capacity. The second pump motor is mechanically connected to at least one component of both the first and second differential gear mechanisms for establishing rotational speeds of the components of the differential gear mechanisms during the different input-output speed ratio ranges in relationship to the variations of the first pump motor's hydraulic capacity. The first differential gear mechanism includes at least three elements, the first element being connected to the input shaft, the second element being connected to the output shaft, and the third element being connected to the second pump motor. The second differential gear mechanism includes at least three elements, the first element being connected to the input shaft, the second element being connected to the output shaft, and the third element being connected to the second pump motor. A clutch mechanism selectively cooperates with the elements of the first and second differential gear mechanisms to establish different input-output speed ratio ranges and includes a clutch for selectively connecting the second element of the second differential gear mechanism to the output shaft.

REFERENCES:
patent: 3667321 (1972-06-01), Maurice
patent: 3714845 (1973-02-01), Mooney, Jr.
patent: 3722324 (1973-03-01), Cordner et al.
patent: 3783711 (1974-01-01), Orshansky, Jr.
patent: 4008628 (1977-02-01), Orshansky, Jr.

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