会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 7. 发明专利
    • ROD-TYPE LIFTING DEVICE FOR HIGH LOAD MATTER
    • JPH10297880A
    • 1998-11-10
    • JP11888497
    • 1997-04-22
    • KAWASAKI HEAVY IND LTD
    • MATSUDA TOMOAKINISHIDA AKIOISHIDA KIMINARI
    • B66F3/08B66F7/14
    • PROBLEM TO BE SOLVED: To unify the stress generated on a screwing part, and prevent the generation of partially concentrated stress, by screwing a nut member of spindle structure, which can not be rotated and is mounted for vertically moving the high load matter, and of which a thickness becomes thinner from a lower part toward an upper part, to a screw rod vertically mounted on a frame. SOLUTION: A nut member 3 of spindle structure of which the thickness is gradually thinned from a lower part toward an upper part, is screwed on a screw rod 1 in such manner that it is unrotatable and vertically movable. A step part 6 for mounting and fixing a vertically movable beam 5 which is guided by a frame 2 is formed on a lower outer periphery of the nut member 3, and a load receiving beam 7 of horizontal atitude, which is movable in a fore and aft axial direction perpendicular to a left and right axial direction and comprises a gate bar structure, is loaded on an upper face of the vertically movable beam 5. As mentioned in the above, by providing the nut member with the spindle shape, the stress on each screw thread is similar to that of the other, the load applied to the screw thread and the displacement of the screw thread are balanced, and the stress generated on the screw threads can be almost unified.