Split input planetary transmission
First Claim
1. A planetary transmission comprising:
- an input section, including a reversible planetary drive adapted for connection to a prime mover, an output section and an intermediate drive shaft coupled between said input and output sections;
said output section including an output shaft coaxially aligned with and positioned adjacent to the intermediate drive shaft;
low, intermediate and high speed planetary gear sets;
each gear set including a sun and ring gear meshed with a plurality of planet gears;
each sun gear being coupled for rotation with the output shaft;
each gear set including a brake coupled to its ring gear and selectively operable for preventing rotation of the ring gear; and
each gear set further including a planet carrier with the planet carrier of the low speed planetary gear set being coupled for rotation with the ring gear of the intermediate speed planetary gear set, with the planet carrier of the intermediate speed planetary gear set being coupled for rotation with the ring gear of the high speed planetary gear set and with the planet carrier of the high speed gear set being coupled for rotation with the intermediate shaft.
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Abstract
A planetary transmission of a vehicle drive train comprises an input section including three planetary gear sets and three brakes that are selectively operable to condition the three gear sets for respectively establishing a forward converter drive, a reverse converter drive and a direct drive at an output shaft of the input section. The planetary transmission further comprises an output or range section coupled to the output of the input section. The output section includes three planetary gear sets connected together so as to form a three-stage planetary set and three brakes are respectively associated with the three gear sets and selectively operable to control the three gear sets such that low, intermediate and high output speeds are established for every input to the output section with drive torque being delivered by all three gear sets for low speed operation, by two gear sets for intermediate speed operation and by a single gear set for high speed operation.
44 Citations
3 Claims
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1. A planetary transmission comprising:
- an input section, including a reversible planetary drive adapted for connection to a prime mover, an output section and an intermediate drive shaft coupled between said input and output sections;
said output section including an output shaft coaxially aligned with and positioned adjacent to the intermediate drive shaft;
low, intermediate and high speed planetary gear sets;
each gear set including a sun and ring gear meshed with a plurality of planet gears;
each sun gear being coupled for rotation with the output shaft;
each gear set including a brake coupled to its ring gear and selectively operable for preventing rotation of the ring gear; and
each gear set further including a planet carrier with the planet carrier of the low speed planetary gear set being coupled for rotation with the ring gear of the intermediate speed planetary gear set, with the planet carrier of the intermediate speed planetary gear set being coupled for rotation with the ring gear of the high speed planetary gear set and with the planet carrier of the high speed gear set being coupled for rotation with the intermediate shaft. - View Dependent Claims (2, 3)
- an input section, including a reversible planetary drive adapted for connection to a prime mover, an output section and an intermediate drive shaft coupled between said input and output sections;
Specification