Method for making an epicyclic speed reducer with two stage integral rotor
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United States of America Patent
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Jun 13, 1989
Grant Date -
N/A
app pub date -
May 1, 1987
filing date -
May 1, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In the present invention, a two-stage integral epitrochoidal cyclic rotor is produced by a machining method which produces the desired tolerences in both stages of the rotor without removing the work-piece from the support that holds it throughout the manufacturing process. In the manufacturing process, the blank starting work-piece, which is preferably a circular disc, is secured to a support element, for example by a magnetic chuck. The overall outer surface of the work-piece is then rotated and orbited while it is accurately machined to produce the epitrochoidal contour of the first stage of the rotor. Then, without releasing the work-piece from the holding surface, a second accurate machining operation, again with rotation and orbiting, is carried out on the upper half of the work-piece to form the epitrochoidal contour of the second stage of the rotor. This arrangement provides an inexpensive method for making a two-stage integral epitrochoidal cyclic rotor in which the required precision of each contour is obtained while the tolerances between the epitrochoidal surfaces of the two stages are achieved and maintained. An epicyclic drive using the two-stage integral epitrochoidal cyclic rotor is also disclosed.
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