Multispeed powershift transmission
OwnerJoachim Horschinventor
Life of this patent
Estimating the term…
Abstract
A mechanical power transmission system for an engine or motor driven vehicle is disclosed. The transmission of the present invention includes an input transmission, a compound planetary transmission, and an output transmission. The compound planetary transmission includes two input and two outputs. The input transmission has a single input connected to the engine or motor of the vehicle and two outputs connected to the two inputs to the planetary transmission. The output transmission includes two inputs connected to the two outputs of the planetary transmission and one output connected through suitable gearing to the wheels of the vehicle or any other mechanism to be driven by a motoring device at various speed ratios.
Claims49
A mechanical power transmission system connectable to an engine driven output of an apparatus, comprising:
- a housing;
- an input transmission arranged within said housing and including an input and two outputs, with said input being operably connected to the driven output of said apparatus;
- a compound planetary system including two inputs and two outputs, with said inputs being operably connected to the two outputs of said input transmission through mating gear sets;
- and
- an output transmission including two inputs connected to the two outputs of the compound planetary system and one output connected, through gearing, to a mechanism configured to be driven by said motor driven apparatus at various speeds.
The transmission system of 22 wherein sequentially higher speeds for the output of the output transmission are obtainable within the normal operating range where the first put of the compound planetary system is connected to the input of the input transmission through four selectively engagable clutches, with a lowest speed ratio being established for said transmission system when only one of said four clutches is engaged, and with one additional clutch of said four clutches being engaged in order to obtain the next higher speed for the output of the output transmission.
A transmission system operably connected to a rotatable output of an engine said transmission system comprising:
- a housing;
- an input transmission arranged within said housing and having an input, two outputs and selectively operable gearing disposed between said input and said outputs to define a first selectively connectable power flow path from the engine to either first or second inputs of a compound planetary system, and wherein said input transmission is comprised of a second selectively connectable power flow path from the engine to the second input of the compound planetary system, with said second selectively connectable power flow path being continuously variable, and wherein said compound planetary system is configured with mating gear sets to absorb, combine and deliver power through either of two outputs to an output transmission, with said output transmission having first and second inputs connected to the two outputs of the compound planetary system to absorb power selectively at various gear ratios and gearing for transmitting power to an output at various rotational speeds relative to the rotational speed of the engine output, and wherein the power flows at the outputs of the planetary system may be positive or negative.
A transmission system operably connected to a rotatable output of an engine, said transmission system comprising:
- a housing;
- an input transmission arranged within said housing and having an input, two outputs and selectively operable gearing disposed between said input and said outputs to define a first selectively connectable power flow path from the engine to either first or second inputs of a compound planetary system, and wherein said input transmission includes a hydrostatic system including a variable hydrostatic unit defining, at least partially, a second selectively connectable power flow path from the engine to the second input of the compound planetary system, with said second selectively connectable power flow path being continuously variable, and wherein said compound planetary system is configured with mating gear sets to absorb, combine and deliver power through either of two outputs to an output transmission, with said output transmission having first and second inputs connected to the two outputs of the compound planetary system to absorb power selectively at various gear ratios and gearing for transmitting power to an output at various rotational speeds relative to the rotational speed of the engine output, and wherein continuously variable power flow path provides a speed range for the second input of the compound planetary system between forward and reverse such that as an output of said hydrostatic system approaches extreme speeds, in forward or reverse directions, a shift from a first clutch to a second clutch in the output transmission is effected at or near synchronism of the engaging clutch, with synchronism being defined as the condition where an input member of the clutch is operated at approximately equivalent speed as an output member of the same clutch.
Dependencies are inferred from the claim text.