| 摘要 |
A power-driven saw is disclosed having a readily-detachable, integrated endless-belt cutting assembly unit. The saw includes a power unit having a housing, and further includes a cutting assembly unit which can be mounted on the power unit, and detached therefrom, as a unit. The integrated cutting assembly unit includes a generally plate-like cutting element support, and an endless-belt cutting element (e.g., a saw chain articulated blade, or the like) which extends generally about the periphery of the support for high speed cutting movement thereabout. The integrated cutting assembly unit further includes means for driving the endless-belt cutting element, with the drive means being operatively-coupled with the motor of the power unit of the saw when the integrated cutting assembly unit is mounted to the power unit. The integrated cutting assembly unit further includes means for selectively-varying the tension of the endless saw blade for assuring optimum cutting performance, and which, desirably, permits the cutting element to be selectively-tensioned even when the integrated cutting assembly is detached from the power unit. The easily-detachable nature of the integrated cutting assembly unit greatly facilitates maintenance of the cutting element, and permits the power unit of the saw to be easily equipped with a new cutting element so as to avoid or minimize undesirable interruptions in cutting operations.
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