| 摘要 |
1,128,842. Endless conveyers. NATIONAL RESEARCH DEVELOPMENT CORP. 5 April, 1967, No. 16827/66. Heading B8A. [Also in Division A1] In a cabbage-harvester the cut crop is fed on to a conveyer 21 by a paddle-wheel 31 comprising a plurality of paddles 33 each of which is rigid in its direction of travel as the paddlewheel rotates but is flexible radially so that in the event of crop being trapped below one of the paddles, that paddle can yield radially to release it. The machine is mounted on a tractor 1 to extend alongside it and the cabbages are cut by two co-operating circular saws 7, 9 inclined towards one another at ground-level. The paddle-wheel 31 is mounted directly above the saws and feeds the inclined endless conveyer 21 which in turn delivers to a transverse conveyer 6. The space above the saws is closed laterally by two fixed plates 47 between which the paddles 33 fit with a small clearance. Each paddle comprises a bar 57 integral with a square-section arm 51 received in a socket 53 in the paddlewheel, the bar being connected with a second, radially-spaced, bar 61 by two lengths of rollerchain 39, 59 and by two hairpin-springs 63. The whole assembly is enclosed in a flexible cover (Fig. 3, not shown). In a modification, the parallel bars 57, 61 of each paddle are interconnected by spring-loaded lazy-tongs. |
