PROBLEM TO BE SOLVED: To accurately synchronize extending and shortening of a plurality of hydraulic cylinders.SOLUTION: A hoist unit comprises: a first oil passage 13 one end of which is connected to a hydraulic pump 4; a plurality of second oil passages 14 branching from the other end of the first oil passage 13; lifting motors 7a to 7d respectively connected to the plurality of second oil passages 14; and a plurality of third oil passages 15 respectively interposed between the lifting motors 7a to 7d and hydraulic cylinders 2a to 2d. The lifting motors 7a to 7d include: an output shaft 72 rotated accompanying inflow and outflow of hydraulic oil; and a gear 73 connected to the output shaft 72. Since respective gears 73 for the lifting motors 7a to 7d are formed with the same number of teeth and disposed so as to be engaged with one another, the lifting motors 7a to 7d are equal to one another in terms of the number of revolutions of the output shaft 72. Accordingly, since the hydraulic oil is evenly supplied to each of the hydraulic cylinders 2a to 2d, extending and shortening of the hydraulic cylinders can accurately be synchronized.SELECTED DRAWING: Figure 1
【課題】複数の油圧シリンダのそれぞれの伸縮を精度良く同調させること。【解決手段】油圧ポンプ4に一端が接続される第1油路13と、その第1油路13の他端から分岐する複数の第2油路14と、それら複数の第2油路14にそれぞれ接続される上昇用モータ7a〜7dと、それら上昇用モータ7a〜7d及び油圧シリンダ2a〜2dの間にそれぞれ介設される複数の第3油路15と、を備え、上昇用モータ7a〜7dは、作動油の流入および流出に伴って回転する出力軸72と、その出力軸72に接続されるギヤ73と、を備え、上昇用モータ7a〜7dのギヤ73は、それぞれ同一の歯数で形成されると共に、互いに噛み合わせて配設されるので、出力軸72の回転数は、上昇用モータ7a〜7dのそれぞれにおいて等しくなる。よって、油圧シリンダ2a〜2dのそれぞれに均一に作動油が供給されるので、その伸縮を精度良く同調させることができる。【選択図】図1
HOIST UNIT
昇降装置
2018-11-15
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 |