To hinder wear of an operation gear, resulting from firm contact of a collar with the operation gear.SOLUTION: A screw jack 1 comprises: a jack body 2; a body gear 21 provided in the jack body; an operation gear 3 having a head portion 31 that engages with the body gear and a shaft portion 32 extending from the head portion; and a collar 4 interposed between the jack body and the shaft portion of the operation gear. This screw jack includes a protective portion 5 protecting the operation gear from the collar, and the protective portion includes a cylindrical portion interposed between the collar and the shaft portion.SELECTED DRAWING: Figure 1
【課題】カラーが操作ギアと強く接触することによる操作ギアの摩耗を抑制すること。【解決手段】ジャッキ本体2と、ジャッキ本体内に備えた本体ギア21と、本体ギアに噛み合う頭部31と前記頭部から延びる軸部32とを有する操作ギア3と、ジャッキ本体と操作ギアの軸部との間に介在するカラー4と、を備えたスクリュジャッキ1であって、操作ギアをカラーから保護する保護部5を備え、前記保護部は、カラーと軸部との間に介在する筒部を備えた構成とする。【選択図】図1
SCREW JACK
スクリュジャッキ
2020-05-07
Patent
Electronic Resource
Japanese
IPC: | B66F HOISTING, LIFTING, HAULING, OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD , Hub-, Verhol- oder Schubvorrichtungen, soweit nicht anderweitig vorgesehen, z.B. Vorrichtungen mit unmittelbarer Krafteinwirkung auf die Last |