Shaft Mounted Counterweight, Method and Scroll Compressor Incorporating Same
AssigneeBitzer Kuhlmaschinenbau GmbH
InventorsWayne P. Beagle, James W. Bush, Jason K. Torrisi
Life of this patent
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Abstract
A counterweight mounted to a drive shaft in a scroll compressor is provided. The drive shaft has a central annular segment generally concentric about the central axis and an eccentric annular segment offset from the central axis that can be used for driving the movable scroll compressor body. A counterweight engages the eccentric and also engages the annular segment for location and mounting of the counterweight to the shaft.
Claims20
1-22. (canceled)
A scroll compressor for compressing fluid, comprising,
- scroll compressor bodies having respective bases and respective scroll ribs that project from the respective bases and which mutually engage;
- a drive unit providing a rotational output on a shaft, the shaft operatively driving one of the scroll compressor bodies to facilitate relative movement for the compression of fluid;
- and
- a counterweight mounted to the shaft, the counterweight having a first shaft contact surface defined about a first axis coacting with the shaft, and a second shaft contact surface defined about a second axis different than the first axis coacting with the shaft;
- wherein the counterweight further includes an opening with an at least partial counterbore which operates to locate the counterweight at a predetermined angular location about a circumference of the shaft.
An apparatus, comprising:
- a shaft rotatable about a central axis, the shaft having a central annular segment generally concentric about the central axis and an eccentric annular segment offset from the central axis, wherein the eccentric annular segment includes a drive bush configured to directly engage a drive hub of a scroll compressor body to effect the rotation thereof;
- and
- a counterweight located on the drive bush engaging the eccentric and engaging the annular segment for location and mounting of the counterweight to the shaft, the counterweight having means for locating at a predetermined angular position about the circumference of the shaft.
A method of mounting a counterweight to a shaft in a scroll compressor assembly, comprising:
- thermally differentiating a shaft and a counterweight to facilitate assembly, the shaft having annular segments including a central annular segment generally concentric about a central axis and an eccentric annular segment offset from the central axis;
- assembling the counterweight with the shaft, the counterweight having an opening with an at least partial counterbore;
- locating the counterweight on a first one of the annular segments;
- locking the counterweight on a second one of the annular segments.
Dependencies are inferred from the claim text.