Machine element or mechanism – Mechanical movements – Rotary to or from reciprocating or oscillating
Patent
1975-07-09
1978-09-19
Wyche, Benjamin W.
Machine element or mechanism
Mechanical movements
Rotary to or from reciprocating or oscillating
56330, F16H 3300
Patent
active
041144635
ABSTRACT:
The invention relates to a drive for a straddle type berry harvester suitable in particular for harvesting raspberries. The harvester has a frame mounted on wheels movable over a row of berry plants and having opposed rotatable upright cylindrical tined shakers connected above by universals to output shafts of a drive and mounted above conveyors in laterally slidable bearings to avoid obstructions in their path. Spring-mounted interleaved deflector plates lie between and beneath the shakers inclined towards the conveyors to guide berries shaken off by the shakers and falling therebetween. The shakers are rotated by cooperation of the tines with the plants as the harvester moves thereover.
The drive for the shakers consists of two vibrating head assemblies and a high speed input in each assembly driven in synchronization but in opposed rotary direction by a single high speed prime mover. The high speed input is transmitted to an eccentric mounted on an input shaft in each assembly, the rotation of the eccentric producing pivoting of a link pivotally mounted on a rotatable housing for the input shaft. The housings are linked for synchronized contra-rotation. The movement of each link is transmitted by a crank to an output shaft of the associated assembly as a torsional vibration. The output shafts and shakers connected thereto are allowed to rotate under the action of the plants thereon by virtue of the rotatable housing and are also shaken by the high speed torsional vibration applied by the vibrating head assemblies.
In a modified drive more suitable for use with black-current harvesters, a separate prime mover which drives the harvester also provides a positive rotation of the housings and hence the shakers in contra-rotation.
REFERENCES:
patent: 3344591 (1967-10-01), Christie et al.
Garden Graham Miller
Harwood Richard James
New Zealand Inventions Development Authority
Ratliff, Jr. Wesley S.
Wyche Benjamin W.
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