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    • 10. 发明授权
    • Chain saws
    • 链锯
    • US3878607A
    • 1975-04-22
    • US48382074
    • 1974-06-27
    • MCCULLOCH CORP
    • EHLEN JACK WBAILEY JAY R
    • B27B17/04B27B17/12
    • B27B17/12B27B17/04Y10T83/8881
    • A chain saw includes side plates defining a cutter bar and a sprocket wheel freely rotatably mounted at the nose end thereof to guide a cutting chain. The axial spacing between the sprocket wheel and the inner surfaces of the side plates is greater at the root portions of the sprocket wheel that at a location remote from the root portions to prevent rubbing which could otherwise produce heat checking at the root portions of the sprocket teeth. In accomplishing this, the root portions can be recessed away from the side plate inner surfaces and/or the side plate inner surfaces can be recessed away from the root portions. The recesses define reservoirs for receiving lubricating medium to maximize lubrication capacity.
    • 链锯包括限定切割杆的侧板和在其前端可自由旋转地安装以引导切割链的链轮。 链轮和侧板内表面之间的轴向间距在链轮的根部处在远离根部的位置处较大,以防止摩擦,否则可能会在链轮的根部处产生热量检查 牙齿 在实现这一点时,根部可以从侧板内表面凹入,和/或侧板内表面可以从根部凹入。 这些凹槽限定用于接收润滑介质的储存器以最大化润滑能力。