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Device for adjusting the angle of a sighting unit to a target

A target, clutch unit technology, applied in the direction of active optical measurement devices, instrument parts, instruments, etc., can solve the problem of not being able to adjust quickly, and achieve the effect of saving manufacturing costs, avoiding adjustment, and saving maintenance costs

Inactive Publication Date: 2006-05-31
LEICA GEOSYSTEMS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the detent torque of the friction clutch is constant, smooth mechanical quick adjustments cannot be made at the same time as reliable and precisely positioned adjustment angles

Method used

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  • Device for adjusting the angle of a sighting unit to a target
  • Device for adjusting the angle of a sighting unit to a target
  • Device for adjusting the angle of a sighting unit to a target

Examples

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Embodiment Construction

[0025] Figures 1a and 1b show a first embodiment of an angle adjustment device known from the prior art in two different sectional views. The cross-section in FIG. 1b is taken along the section line A-A in FIG. 1a. The device for a geodetic instrument, in particular a theodolite, a rangefinder or a panorama station, has an aiming unit 1a, shown only partially, in the form of an altimeter with a housing 17a and a two-part datum Part 2a, the reference part has the substructure of the theodolite not shown. The bearing 3 a, which may also be formed as a rolling bearing, also as a sliding bearing, enables the targeting unit 1 a to be twisted relative to the reference part 2 a about an axis 4 a forming a vertical shaft. A clamping ring 14a with clamping pins 15a is arranged around the reference part 2a. By twisting the eccentric shaft 16a about the adjusting axis 21a in the universal joint-type quick-adjusting hollow shaft 20a, the clamping bolt 15a is adjusted along an axis inter...

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Abstract

The invention relates to a device for adjusting the angle of a sighting unit towards a target, in particular for a geodesic-measuring instrument. The inventive device comprises a reference base, at least one bearing for mounting the sighting unit thereon in such a way that it is pivotable with respect to said reference base around an axis, a gear for accurately adjusting an angle of rotation around said axis between the sighting unit and the reference base and a coupling unit for limiting or interrupting a torque flux around the axis. The gear and the coupling unit are in series arranged in the torque flux between the sighting unit and the reference base. The torque flux is carried out around the axis between the sighting unit and the reference base by means of the gear and the coupling unit when it is non-interrupted thereby. Said device is characterised in that the coupling unit is provided with at least one electromagnet for producing a magnetic field and the torque flux can be limited or interrupted according to the interruptibility of the magnetic field.

Description

technical field [0001] The invention relates to a device according to the preamble of claim 1 for an angular adjustment of an aiming unit of a geodetic instrument, in particular for a target. Background technique [0002] Aiming units in geodetic instruments such as theodolites, range finders or panoramic stations are generally distinguished by their extremely high accuracy of angular adjustment to less than 0.5″ or 0.15 mgon depending on the accuracy class, by Turn to align the target. Such high precision requires a high-precision transmission mechanism to accurately adjust the angle. In addition to high angle adjustment accuracy, a high angle adjustment speed is also required, so that it can be quickly and easily within the range of eg + / -180 Furthermore, in levels and other geodetic instruments of smaller precision classes, fast adjustments on the one hand and angularly precise adjustments on the other hand are required, wherein the accuracy of the fine angle adjustments ...

Claims

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Application Information

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IPC IPC(8): G01C1/02G12B5/00
CPCG01C1/02G12B5/00G01C15/002
Inventor 安东·哈勒
Owner LEICA GEOSYSTEMS AG