DRILL SHANK ATTACHMENT APPARATUS Russian patent published in 1998 - IPC

FIELD: mechanical engineering, in particular, agricultural engineering. SUBSTANCE: apparatus has bar 1 with T-shaped longitudinal slot 2, bracket 3, rod 5 inserted into bracket opening and provided with head 5 on one end and shank 7 on other end. Nut 8 is screwed onto shank 7 for engagement with bracket 3. Head 5 is positioned in slot 2 for engagement with its shoulders 6 and is provided with eccentrics which are wedged between opposed surfaces of slot 2. Counterhead 9 positioned on end of threaded shank 7 is adapted for receiving wrench and engaging end of nut 8. Bar 1 is mounted on drill frame. Carriers 14 of share are pivotally connected with bracket 3. Screwing of nut 8 biased to bracket 3 onto shank 7 performed in alternation with screwing in of rod 4 into nut 8 results in wedging of eccentrics in slot 2 and biasing of joints of connected members along axis of rod 4. When screwed off from shank 7, nut 8 rests upon counterhead 9 and, while wedging on shank 7, it causes disengagement of eccentrics from surface of slots 2. By moving bracket 3 along bar 1, share is fixed in its new position. Share is removed by leading head 5 out of slot 2. Wedging of eccentrics in slot 2 increases adhesion forces in device to prevent bracket 3 from spontaneous displacement along bar 1. EFFECT: increased efficiency and enhanced reliability in operation. 3 cl, 2 dwg