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Protection cover for sextant center shaft

A central shaft and protective cover technology, which is applied in the field of sextant central bearing devices, can solve the problems of increasing maintenance costs, loose nuts, and affecting measurement accuracy, so as to reduce maintenance costs, prevent accidental loosening, and prolong service life Effect

Inactive Publication Date: 2014-01-01
CHANGZHOU HAOMAI MARINE EQUIP TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, the central shaft on the sextant was fixed on the central shaft sleeve by a nut. Long-term use caused the nut to loosen, or even fall off and be lost. The various parts of the sextant also became loose, which affected the accuracy of the measurement.
As a result, the maintenance is inconvenient, the maintenance cost is increased, and the service life of the sextant is shortened.

Method used

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  • Protection cover for sextant center shaft

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Embodiment Construction

[0010] See figure 1 As shown, a protective cover for the central axis of a sextant, the cover 1 is fixed on the central axis with a nut for protecting the nut on the central axis, and the cover 1 is provided with a Groove 2 where the size of the nut wants to match; the protective cover is fixed on the nut on the central shaft by sticking; or the protective cover is fixed on the nut on the central shaft by clamping .

[0011] The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

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Abstract

The present invention discloses navigation mapper equipment, and more particularly relates to a sextant center bearing device. According to a protection cover for a sextant center shaft, a cover body is fixed on a center shaft provided with a screw cap and is provided for protecting the screw cap on the center shaft, and a groove with a size matched with the screw cap is arranged inside the cover body. According to the present invention, the protection cover for protecting the screw cap on the center shaft is added so as to effectively prevent accidental loosening of the screw cap, reduce maintenance cost and prolong a service life of the sextant.

Description

technical field [0001] The invention relates to a nautical surveying and mapping instrument device, in particular to a sextant center bearing device. Background technique [0002] A sextant is an optical instrument used to measure the angle between two distant targets. It is usually used to measure the angle between the sun or other celestial bodies and the sea level or horizon at a certain moment, so as to quickly know the latitude and longitude of the position of the ship or aircraft. Played a major role in navigation. In the past, the central axis of the sextant was fixed on the central shaft sleeve by a nut. Long-term use caused the nut to loosen, or even fall off and be lost. The parts of the sextant also became loose, which affected the measurement accuracy. As a result, maintenance is inconvenient, maintenance costs are increased, and the service life of the sextant is shortened. Contents of the invention [0003] The purpose of the present invention is to solve ...

Claims

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Application Information

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IPC IPC(8): G01C1/08
CPCG01C1/08
Inventor 朱亮狄丹岩
Owner CHANGZHOU HAOMAI MARINE EQUIP TECH
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