FIELD: mechanical engineering.
SUBSTANCE: high-precision variable-length screw rod contains a drive nut and two associated tips. The internal and the external threaded surfaces of the drive nut are made with the same thread directions, but with different pitches. One of the tips is screwed into the internal thread of the mentioned nut, and the second tip is screwed onto the external thread of the nut. Relative movement of the tips when turning the nut is determined by the proposed mathematical relationship.
EFFECT: improved accuracy of regulation of changes in rod length when turning the drive nut.
1 cl, 1 dwg
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