Machine element or mechanism – Gearing – Rotary bodies
Patent
1976-02-17
1977-05-10
Gerin, Leonard H.
Machine element or mechanism
Gearing
Rotary bodies
74 8915, 744248A, 74459, F16H 5518, F16H 2702, F16H 118, F16H 5522
Patent
active
040220761
ABSTRACT:
An anti-backlash, automatically reversing nut construction for use with a diamond thread screw, comprising a nut proper and a separate follower movable with respect to the nut proper, both said parts having through bores for receiving the screw. The follower part carries a non-shiftable thread-engaging ball extending into the bore thereof, and also a laterally-movable thread engaging ball likewise extending into the bore. The movable ball is capable of being shifted translationally on the follower in directions substantially parallel to the screw axis whereby it can transfer from engagement in one groove to engagement in another groove of the screw to thereby effect a change in the axial direction of travel of the nut assemblage. The nut proper also carries a non-shiftable thread-engaging ball and a laterally-movable thread-engaging ball, the latter being capable of shifting translationally on the nut proper, also in directions substantially parallel to the screw axis. Spring means are provided, engageable with both the nut proper and follower, for biasing these parts in opposite axial directions with respect to one another, thereby eliminating looseness of the nut assemblage on the threads of the screw. The arrangement is such that for a given relative sense of rotation between the screw and nut assemblage, the latter can undergo reciprocating movement between the ends of the screw, with the reversals in the axial direction of travel of the nut assemblage being automatically effected with virtually zero backlash.
REFERENCES:
patent: 2644341 (1953-07-01), Rabe
patent: 3779094 (1973-12-01), LaBarre
Gerin Leonard H.
Lehmann H. Gibner
Lehmann K. Gibner
Norco Inc.
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