A multi-section telescopic rod with the combination of self-pushing and pulling

Abstract

The invention discloses a multi-section telescopic rod with self pushing and pulling functions, belongs to the field of mechanical stretching, pushing and pulling, fills the blank that no hard pipe for aerial refueling is available at present in China, and solves the problems that as a cable type crane and a hydraulic type telescopic push rod or a single external thread screw rod are required to respectively complete hoisting and compression of an object separately in the prior art, the jacking capacity of the cable type crane is insufficient, which causes high difficulty in vertical operation, the single external thread screw rod has a limited length, and the three or multiple-section hydraulic type push rod is low in pull back capacity. The telescopic rod comprises three or more sections; stretching of the section of the telescopic rod in front of the final section is completed by directly screwing an internal thread gear, and stretching of each of the rest of sections is completed by screwing of internal and external thread nuts driven by the internal thread gear. The multi-section telescopic rod can stretch, push and pull automatically, hoist and jack the object alone, and work in different directions, and can be applied to the working field of various types of machinery needing three or more sections for automatic stretching, push and pulling.

Description

Technical field: [0001] The invention belongs to the field of mechanical telescopic and push-pull, and can be used in various mechanical work fields requiring multi-section self-extending and retracting, pulling and pushing. Background technique: [0002] At present, the existing telescopic rods with more than three sections, such as those used for mops, fishing nets, various antennas and other machinery, cannot expand and contract by themselves, let alone pull and push objects. In the field of ejecting objects, it is mainly completed by a cable crane and a hydraulic telescopic push rod or a single externally threaded screw, while a cable crane can only lift heavy objects vertically on the ground, with insufficient jacking capacity and difficulty in non-vertical operations; a single The length of the externally threaded screw is limited; the pullback ability of the three-section and above hydraulic push rod is weak, there is a pressure difference between the inside and outsi...

AI Technical Summary

Problems solved by technology

This kind of telescopic rod has simple structure and wide range of uses, and solves different problems in different fields according to the use

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