Gear-type fine tuning mechanism

Abstract

The invention discloses a gear-type fine tuning mechanism which comprises an azimuth tuning device and an azimuth locking device which are connected through a swing rod; the azimuth tuning device comprises a reduction gearbox, a giggle screw, a giggle hand wheel, a gear shaft, a gear, a first bevel gear and a second bevel gear; the giggle hand wheel is connected with the reduction gearbox throughthe giggle screw; the reduction gearbox is connected with the second bevel gear; the first bevel gear and the second bevel gear are meshed mutually; the gear is connected with the first bevel gear through the gear shaft; the azimuth locking device comprises a locking hand wheel, a locking screw and a giggle switch; the locking hand wheel is connected with the locking screw; the locking screw is connected with the swing rod; the giggle switch is electrically connected with the swing rod. The invention discloses the gear-type fine tuning mechanism which has large regulation range, high regulation accuracy and high flexibility.

Description

technical field [0001] The invention relates to a theodolite fine-tuning mechanism, in particular to a gear-type fine-tuning mechanism. Background technique [0002] In the theodolite, in order to make the telescope aim at the target accurately, the theodolite is equipped with a micro-moving screw that rotates the telescope horizontally and vertically, but it is difficult and time-consuming to fine-tune the telescope by hand. When rotating, there must be a release mechanism to cooperate with it, so that the sight frame can quickly reach the target to be aimed at. The traditional theodolite azimuth fine-tuning generally uses the micro-movement screw to push the locking rod and the top spring to drive the sighting frame to rotate. When the micro-moving screw is rotated in the opposite direction, the locking rod will drive the sighting frame to rotate reversely under the action of the top spring. Due to the limitation of the structure of parts such as micro-movement screw and ...

AI Technical Summary

Problems solved by technology

Due to the limitation of the structure of parts such as micro-movement screw and top spring, the adjustment range is small

When the traditional azimuth fine-tuning mechanism is applied to a large-scale theodolite, due to improper selection of the top spring force, when the micro-movement screw rotates, the theodolite sighting frame cannot be pushed evenly, and there is often a jumping phenomenon, making it difficult to align the sighting frame with the target ;Another common problem is: the gap between the micro-movement screw and the nut is large, resulting in shaking, which makes the instrument's collimating frame not stable enough

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