公开(公告)号：US5528835A

公开(公告)日：1996-06-25

申请号：US346518

申请日：1994-11-29

Applicant: Do-Jin Ra

Inventor： Do-Jin Ra

IPC: B27B17/14

CPC classification number: B27B17/14

Abstract: The chain saw tensioner of the present invention provides a sheath anchored at one end to the housing of the chain saw which sheath receives a tensioning shaft slidably therein. The tensioning shaft is interconnected with the housing by a tension screw and is slidably adjustable with respect to the sheath by actuating the tensioning screw. The tensioning shaft and the sheath have matching and aligned slots that cooperate to receive a sliding bolt therethrough. The sliding bolt is interconnected with the blade of the saw and, by actuating the tensioning screw, it may be moved forward with respect to the housing of the saw to move the saw blade forward to tension the chain. Included within the tensioning shaft is a spring interconnected with a bolt rest for receiving and supporting the sliding bolt. The spring provides a bias which acts on the bolt to bias the bolt, and accordingly the saw blade, forward with respect to the housing to tension the chain. The spring further allows the bolt to move rearward of the tensioning shaft, and accordingly, rearward of the housing to decrease tension on the chain to prevent over tensioning of the chain.

Abstract translation: 本发明的链锯张紧器提供了在一端锚固到链锯的壳体上的护套，该护套可滑动地容纳张紧轴。 张紧轴通过张紧螺丝与壳体互连，并通过致动张紧螺钉而相对于护套可滑动地调节。 张紧轴和护套具有匹配和对准的槽，其协作以接收通过其中的滑动螺栓。 滑动螺栓与锯片相互连接，并且通过致动拉紧螺钉，它可以相对于锯的壳体向前移动，以向前移动锯片以拉紧链条。 包括在张紧轴内的是与螺栓连接的弹簧，用于接收和支撑滑动螺栓。 弹簧提供作用在螺栓上以偏置螺栓的偏压，并且因此锯片相对于壳体向前以拉紧链条。 弹簧进一步允许螺栓移动到张紧轴的后方，并且因此在壳体后方减小链条上的张力，以防止链条过度张紧。