| 摘要 |
<p>1461014 Graders O & K ORENSTEIN & KOPPEL AG 15 Nov 1974 [17 Nov 1973] 49662/74 Heading E1F A blade 7 of a grader is adjusted by a mechanism comprising a swivel arm 14 pivotally connected at 13a to the cylinder of a lifting ram 10, a swivel arm 16 pivotally connected at 15a and 19 to the cylinders of a lifting ram 11 and a side displacement ram 12 respectively, the swivel arms being pivotally mounted at 23, 22 to walls 20, 21 of bridge frame 2 and pivotally connected at 26, 25 to a locking member 24 having holes 27a to 31c, and a spring biassed locking bolt 32c for selective engagement with holes 27a to 31a. The pivot points 22, 23, 25 and 26 define a linkage quadrilateral which is asymmetrically disposed with respect to transverse horizontal and vertical axes of symmetry of the bridge frame.</p> |
