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    • 5. 发明授权
    • Chain saw
    • 链锯
    • US4981129A
    • 1991-01-01
    • US326245
    • 1989-03-31
    • Bror E. OstermanSture Andersson
    • Bror E. OstermanSture Andersson
    • B27B17/02B27B17/08B27B17/12B28D1/08E21C25/28
    • E21C25/28B27B17/02B27B17/08B27B17/12B28D1/088Y10T83/8763
    • A chain saw has a chain bar (1) with a nose sprocket (5) over which a saw chain (3) circulates. The sprocket (5) is mounted between two nose cheek plates (53). The interior spacing between the plates corresponds to the thickness of the sprocket. The peripheral area of the sprocket with associated teeth at the bar nose extends outside the cheek plates over at least half the sprocket circumference, such that the saw chain passing over the sprocket goes entirely free from the plates and the rest of the bar. Means are arranged for supplying pressurized lubricant via the bar to the sprocket mounting. The lubricant pressure and the gaps between the side surfaces of the sprocket and the inner faces of the cheek plates are such that in operation lubricant passes out through the gaps. Means are also arranged for supplying flushing and cooling medium via the bar for ejection against the saw chain and sprocket both at the place where the chain meshes with the sprocket and at the place where the chain unmeshes with the sprocket. The saw chain (3) is preferably adapted to run free from the bar before and after meshing with the sprocket. Sawing work is thus carried out mainly by the chain supported by the sprocket. The sprocket (5) suitably has a diameter of a magnitude such that both parts of the saw chain converge in a direction away from the nose sprocket.
    • PCT No.PCT / SE87 / 00379 Sec。 371日期1989年3月31日 102(e)1989年3月31日PCT PCT 1987年8月27日PCT公布。 第WO88 / 01559号公报 日期:1988年3月10日。链锯具有链条(1),其具有齿链(5),锯链(3)在其上循环。 链轮(5)安装在两个鼻颊板(53)之间。 板之间的内部空间对应于链轮的厚度。 在杆杆处具有相关齿的链轮的周边区域在链轮周边的至少一半的外侧延伸到颊板的外侧,使得通过链轮的锯链完全没有板和其余的杆。 装置被设置用于经由杆将加压的润滑剂供应到链轮安装件。 润滑剂压力和链轮的侧表面与颊板的内表面之间的间隙使得在操作中润滑剂通过间隙流出。 装置还布置成用于经由杆供应冲洗和冷却介质,用于在链条与链轮啮合的地方以及链条与链轮不啮合的位置处弹出抵靠锯链和链轮。 锯链(3)优选地适于在与链轮啮合之前和之后离开杆运行。 因此,锯切工作主要由链轮支撑的链条进行。 链轮(5)适当地具有使得锯链的两个部分在远离前端链轮的方向上会聚的直径。