Lift device for opening and closing of oil tank hatchcover

Abstract

The invention discloses a lift device for opening and closing of an oil tank hatch cover. The lift device comprises a hand wheel, a thrust ball bearing, bearing covers, a lead screw shaft, a nut, a support shaft sleeve, a sleeve, a guide sleeve and a base plate, wherein the support shaft sleeve is a cylindrical member and is vertically and fixedly connected to the base plate; a through hole is formed on the middle part of the base plate; the lead screw shaft is screwed in the nut fixedly connected with the upper end of the support shaft sleeve to form a lift mechanism and made of stainless steel; the guide sleeve is embedded at the lower end of the sleeve and coaxially sleeved on the outer wall of the support shaft sleeve; the thrust ball bearing, the bearing covers and the hand wheel are sleeved at the upper end of the lead screw shaft to form a manual rotation mechanism arranged at the upper end of the sleeve; the upper end of the lead screw shaft is hinged with a hand wheel shaft sleeve to realize linkage between the manual rotation mechanism and the life mechanism; and an axial shaft sealing mechanism is arranged at the upper end of the bearing covers. By the lift device, the material required for manufacturing can be reduced, the sealing is high, accumulated water is not produced in the interior, and a joint of the lead screw shaft and the nut cannot be stuck due to corrosion.

Description

technical field [0001] The invention relates to a lifting device, in particular, the invention relates to a lifting device used on ships. Background technique [0002] At present, the opening and closing of the oil tank cover on the ship is realized by the lifting device for opening and closing the oil tank cover. The lifting device for opening and closing the oil tank cover in the prior art includes a handwheel rotating mechanism, a lifting mechanism, a supporting shaft sleeve and a sleeve. The supporting sleeve is coaxially fitted in the sleeve, the handwheel rotating mechanism is installed on the upper end of the sleeve, and the nut in the lifting mechanism is fixedly connected to the upper end of the supporting sleeve; through the hinged connection between the handwheel and the screw shaft, manual rotation is realized The mechanism is linked with the lifting mechanism. The structure of the existing technology is simple, and the lifting action required for the opening an...

AI Technical Summary

Problems solved by technology

The structure of the existing technology is simple, and the lifting action required for the opening and closing of the oil tank cover can be realized conveniently, but there are also some shortcomings in the prior art: the screw shaft is made of carbon steel, and if there is water on the screw, the screw will The joint between the rod shaft and the nut may be killed due to corrosion; external water and dust can easily enter the lifting device from the upper end bearing installation; the supporting shaft sleeve is a rod-shaped member with a cylindrical hole at the upper end. Many, and it is easy to accumulate water in the cylindrical hole

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