| 摘要 |
There is disclosed a workhead for timber processing, the workhead having a main body and a jaw assembly for grappling timber. The jaw assembly includes first and second cooperating pairs of jaw arms that are pivotally mounted to the main body. The first of the cooperating pairs of jaw arms provides cutting blades for delimbing. The workhead further includes a feed roller assembly for translating a felled tree through the cutting blades. First and second feed rollers of the feed roller assembly are associated with the jaw arms of the second cooperating pair of arms of the jaw assembly. A third feed roller is provided on the main body for pivotal movement relative to the main body. The feed rollers also effect compression debarking of the felled tree as it is translated through the cutting blades. Each roller has projecting engaging bars which extend in a generally helical configuration along the outer surface of the roller and between its opposed terminal ends. Each of the engaging bars is spaced apart from an adjacent engaging bar in a substantially parallel relationship, and the engaging bar has a contacting edge to engage the surface of the tree, with the contacting edge providing blunt longitudinally extending projections along its length. Also disclosed is a fluid delivery system having a swivel hydraulic manifold in combination with a fixed hydraulic manifold attached to the main body of the workhead. The workhead is capable of various timber processing operations, such as felling, grappling, bunching, shovel-logging, loading, debarking, delimbing and bucking.
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