| 摘要 |
An eccentric drive mechanism (28) especially useful for a sickle assembly (12) of a harvester or mower includes two shafts (30, 36) that are coupled to a wheel-like drive member (20) such as a pulley, with one of the shafts (36) being in offset relation to the other shaft (30) and the central axis of the drive member (20). Each shaft (30, 36) presents inclined, flat wall sections (40, 42) in mutual interengagement, and releasable means (44) are provided for bringing the wall sections (40,42) into a position of wedging contact with each other and to the drive member (20) in order to retain the rotative position of one of the shafts (30,36) in a certain, pre-defined orientation relative to the rotative position of the other shaft and to the drive member (20). Advantageously, the drive mechanism enables the wheel-like drive member (20) to be supported on both sides to avoid imposition of cantilever-type loadings, and yet the mechanism can be readily disassembled and reassembled when desired without the need for extensive labor to realign and re-position the rotative orientation of the two shafts (30,36) relative to the drive member (20). The eccentric shaft (36) is coupled to a sway bar (62) of the header (10) for oscillation of the sickle (12). |
