Parallel interlocking chain stretchable device and stretching method

Abstract

The invention provides a parallel interlocking chain type stretchable device and a stretching method. The stretchable device is of a double-chain structure and formed by alternately engaging two single stretchable parallel chains. Each single stretchable parallel chain 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 parallel interlocking chain type stretchable device has the advantage that the length is convenient to adjust. In the contracting process of the parallel interlocking chain type stretchable device, the chain type units of each contracting single stretchable parallel chain 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. After the two single stretchable parallel chains are engaged and interlocked, the stretchable device has higher rigidity, can bear high-strength pushing force and pulling force needed by stretching, and can also bear the high bending force in the direction perpendicular to the stretching direction. The parallel 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 parallel interlocking chain type 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 i...

AI Technical Summary

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

Images