A linear linkage expansion device

Abstract

The invention provides a linear superposed large scope fast telescopic device. The device comprises a pedestal and at least two stages of slide blocks. A gear which is located in the pedestal and connected with a motor drives the slide blocks to slide. The slide blocks are stacked on the pedestal stage by stage. The linkage relationship between the slide blocks is formed through meshing of gears and racks of the upper and lower stages of slide blocks. According to the telescopic device, different extension-and-retraction amount and different extension-and-retraction speed can be obtained by selecting the quantity of the stacked slide blocks. The extension-and-retraction directions of all stages of slide blocks are identical. The extension-and-retraction amount can be decided by the number of stages of the slide blocks. The linear linkage telescopic device overcomes the structural instability caused by the situation that in the prior art, power equipment needs to extend or retract with the device, and accordingly the position of the power equipment is changed. Through keeping the power equipment in an unchanged position of the fixed pedestal, because of the linkage relationship between the upper and lower stages of slide blocks, the power is transmitted and outputted to each stage of slide block, thus not only the precise control of the extension-and-retraction amount can be achieved, but also at the same time, the stability of the whole device is maintained.

Description

technical field [0001] The invention relates to the structural field of mechanical operating devices, in particular to a device structure for telescopic operation mainly used in narrow environments. Background technique [0002] Currently existing mechanical telescopic devices (excluding hydraulic and pneumatic telescopic devices) basically adopt the principle of two-way telescopic expansion, that is, fix the middle rod and expand and contract both ends at the same time, and the number of joints is often fixed at two or three. Therefore, the existing mechanical telescopic devices generally have the problem that the position of the driving unit changes during the telescopic process. The unfixed drive has a serious negative effect on the stability of the telescoping process. In addition, the existing mechanical telescoping devices are prone to breakage when performing rapid telescoping, so when telescoping over a long distance, they can only adapt to a slow telescoping speed,...

AI Technical Summary

Problems solved by technology

However, in the existing mechanical telescopic devices, the telescopic speed and telescopic distance are generally not taken into consideration at the same time, and the stability of the telescopic process needs to be enhanced.

[0004] Therefore, there are the following three problems that need to be solved or improved in the existing mechanical telescopic devices: (1) the number of nodes is fixed, and the required number of telescopic nodes cannot be adjusted as required; Instability caused by changes; (3) The scaling speed problem during long-distance scaling

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