A polygonal interlocking chain expansion device and a method for performing expansion and contraction

Abstract

The invention provides a polygonal interlocking chain type stretchable device and a stretching method. The polygonal interlocking chain type stretchable device is of a multi-chain structure and formed by alternately engaging a plurality of single stretchable chain type structures. Each single stretchable chain type structure is composed of a plurality of mutually hinged chain type units. The number of the chain type units can be increased flexibly according to needs, and therefore the purpose of adjusting the length of the stretchable device is achieved, and the polygonal interlocking chain type stretchable device has the advantage that the length is convenient to adjust. In the contracting process of the polygonal interlocking chain type stretchable device, the chain type units of each contracting single stretchable chain type structure are wound on a chain winding machine, the function of contracting to the zero position is achieved, and the advantage that the occupied space is small after contracting is achieved. Furthermore, compared with an existing device, under the condition that the occupied space is fixed after the stretchable device contracts, a large extension length is provided, and the polygonal interlocking chain type stretchable device has the advantage of being easy to produce and install.

Description

technical field [0001] The invention belongs to the technical field of mechanical transmission, and in particular relates to a polygonal interlocking chain expansion device and a method for performing expansion and contraction. Background technique [0002] At present, there are a large number and a wide variety of mechanical devices, the motion of which is linear reciprocating motion, for example, stage lifts, jacks, electric push-pull rods, crane telescopic arms and so on. In the above-mentioned mechanical devices, it is necessary to install a telescopic mechanical device, driven by the telescopic mechanical device, to realize the linear reciprocating motion of the controlled object. [0003] From the perspective of implementation, existing telescopic mechanical devices mainly include two types: scissor type telescopic devices and sleeve rod telescopic devices. Among them, the scissor-type telescopic device adopts multi-rod cross connection, and realizes telescoping in a ...

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Problems solved by technology

[0004] In the process of realizing the present invention, the inventor found that the above two kinds of telescopic mechanical devices all have the following disadvantages: (1) the device after shrinking cannot shrink to 0 position, and still occupies a large space; (2) when the telescopic mechanical device shrinks In the case of a certain occupied space, the stretching length provided by it is limited; (3) the external force bearing capacity perpendicular to the direction of telescopic movement is relatively poor

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