| 摘要 |
A mowing device including a disc (120), the disc (120) providing a mount for at least one knife (50), said knife (50) being pivotably mounted to said disc (120) by a pivot pin (140), said pivot pin (140) defining a mounting axis (116), such that the knife (50) can rotate about said pivot pin (140) between a first extended position and any retracted position, said disc (120) being constructed of a basic material thickness and comprising a mounting surface (124), said mowing device including a knife adapter (130) comprising a cylindrical aperture (132) and a projection (136), said pivot pin (140) comprising a first cylindrical section (142) of a first diameter to fit into said cylindrical aperture in said knife adapter, and a second cylindrical section (144), of a second diameter, with a groove (146) defined by a groove width and a pin section thickness at the groove (146) of a dimension less than said second diameter; said mowing device including a retainer (150) constructed of a material thickness equal to or less than the width of said groove (146) with a key-hole shaped aperture (152) defined by a first circular section with a first inside diameter larger than said second diameter of said pin (140) and a slot shaped section with a width that is greater than said pin section thickness but less than said second diameter of said pivot pin (140), wherein said slot-shaped section of the retainer engages said groove (146) of said pivot pin (140) to retain said pivot pin while said projection (136) of said knife adapter (130) engages said retainer (150). <IMAGE> |
