Screw jack

Details Screw jack Screw jack

B - Operations, Transporting

66

F

B66F 3/16 (2006.01) B66F 3/08 (2006.01) B66F 3/10 (2006.01)

Patent

CA 2170940

A screw jack comprising a bed, a case body having a groove formed therein and mounted on an upper surface of the bed, and a thrust bearing mounted on a central area of the upper surface of the bed. A large bevel gear is placed on the bed through the thrust bearing such that a main threaded shaft of the large bevel gear is secured at a lower end thereof to the thrust bearing and erected upwardly therefrom. A small bevel gear carried on the case body through a bearing meshes with the large bevel gear. An outer sleeve is guided along the groove of the case body. A heavy object raising inner sleeve is disposed within the outer sleeve and is guided by the outer sleeve. The main threaded shaft is rotated through the large bevel gear by the small bevel gear which is rotated by an external driver so that a heavy object is raised. The case body is integrally formed of aluminum casting or hard resin.

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