Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1979-07-05
1981-11-03
Braun, Leslie
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
74390, F16H 128, F16H 3500
Patent
active
042979200
ABSTRACT:
A cycloid gear is provided which comprises a pair of eccentric discs which are attached to a drive shaft and which carry curved discs thereon having outer peripheries of cyclodic curved shape which roll off along a plurality of rollers that engage said outer peripheries, the pair of curved discs having bore holes extending therethrough in overlapping relation to one another respectively to define an effective axially directed opening through each pair of overlapping bore holes, there being a plurality of axially directed bolts which pass through said effective axially directed openings and which are connected to an output shaft to drive the output shaft as the curved discs rotate with rotation of the drive shaft and eccentric discs. Each bolt carries a resilient roller whose unstressed outside diameter is greater than the predetermined minimum dimension of the effective axially directed opening with which said bolt is associated, whereby said rollers transmit the rotational movement of the curved discs to the output shaft without any clearance and preload the gear.
REFERENCES:
patent: Re17811 (1930-09-01), Braren
patent: 1773568 (1930-08-01), Braren
patent: 3073184 (1963-01-01), Braren
patent: 3160032 (1964-12-01), Black
patent: 4050331 (1977-09-01), Braren
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