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Driving power source unit for automotive power transmission testing apparatus employing motor

  • US 5,085,071 A
  • Filed: 11/13/1989
  • Issued: 02/04/1992
  • Est. Priority Date: 11/14/1988
  • Status: Expired due to Term
First Claim
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1. A step-up gear unit comprising:

  • a first input shaft connected to a first power source unit and carrying a first input gear for driving the later;

    a second input shaft connected to a second power source unit and carrying a second input gear for driving the later, said second power source unit being independent of said first power source for independently driving said second input gear from said first input gear;

    an output shaft connected to a work and carrying a sole output gear for rotation therewith;

    a first and second intermediate gears supported on a rotary shaft, said first intermediate gear being adapted to mesh with said first input gear, said second input gear, at least one of said first and second intermediate gear being movable for selectively engaging and disengaging with associated one of said first and second input shaft, said at least one of first and second intermediate gears being associated with means for permitting axial shifting of said at least one of first and second gears between a first position at which said at least one of first and second intermediate gears is engaged with the associated one of said first and second input gears, and a second position at which said at least one of first and second intermediate gears is axially shifted away from the associated input gear for disconnecting gear train therebetween;

    a third intermediate gear rigidly secured on said rotary shaft for rotation therewith and constantly meshed with said output gear for driving latter; and

    wherein said axial shift permitting means includes spline coupling provided between said at least one of first and second intermediate gears and said rotary shaft.

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