Clutch locking mechanism of electric theodolite

Abstract

The invention relates to a clutch locking mechanism of an electric theodolite. The clutch locking mechanism comprises a lens cone seat and a pitching angle rotating shaft fixedly connected with the lens cone seat, the lens cone seat is fixedly arranged at one end of the pitching angle rotating shaft, and the other end of the pitching angle rotating shaft is connected with a clutch hand wheel. A deep groove ball bearing, a gear, a clasping ring, a clasping ring pressing ring and a plane needle bearing are sequentially arranged on the outer circumference of the pitching angle rotating shaft in a sleeving mode in the direction from the lens cone seat to the clutch hand wheel, and a shell wrapping the deep groove ball bearing, the gear, the clasping ring, the clasping ring pressing ring and the plane needle bearing is arranged outside the pitching angle rotating shaft. A motor and a worm are arranged in the shell, and the worm and the gear are in meshing transmission under the action of the motor. The clutch locking mechanism has the following advantages that the clamping effect of the gear and the pitching angle rotating shaft is greatly improved through the axial clamping force and the radial clamping force applied to the clamping ring by the clamping ring pressing ring, and rotation slipping after the large lens cone is installed is avoided.

Description

Technical field: [0001] The invention belongs to the field of electric theodolite, and in particular relates to a clutch and locking mechanism of the electric theodolite. Background technique: [0002] The electric theodolite clutch locking device is used to lock the gear and the pitch angle rotation shaft to each other, so that after the gear and the pitch angle rotation shaft are fixed, the motor drives the worm and the gear for meshing transmission, thereby driving the axial rotation of the lens barrel seat . [0003] The existing electric theodolite clutch locking mechanism includes pitch angle rotation axis A1, lens barrel seat A2, friction plate A3, non-asbestos friction plate A4, gear A5, pressure plate A6, plane needle bearing A7 and clutch hand wheel A8, see image 3 , press the plane needle bearing A7 and the pressure plate A6 through the clutch handwheel A8, so that the pressure plate A6 exerts an axial pressing force on the gear A5, and under the axial friction o...

AI Technical Summary

Problems solved by technology

[0004] Patent No. 201610084427.3 A clutch locking device for a small theodolite bracket, see Figure 4 , tighten the screw so that the two ends of the locking ring 182 (clamp-like structure) are compressed and approach each other. At this time, the inner diameter of the locking ring 182 becomes smaller, and the tapered surface of the locking ring 182 further forces the locking ring 183 Moving upwards, since the top of the shaft is locked by the lock nut 22 and the nut 22 and the upper spacer 21 are rigid components, so only space can be left below for the locking ring 138, and the end face of the friction washer 17 is received by the nut 22 and the upper pad at this time. The reverse force of the spacer 21 is pressed, thereby increasing the friction between the worm wheel 14 and the friction washer 17, thereby realizing the tight fixation of the worm wheel 14 and the shaft 181. In this patent, by changing the locking pressure ring 182 The inner diameter of the locking ring 183 is moved, and the movement of the locking ring 183 forces the nut 22 and the upper washer 21 to apply a reverse force to the worm wheel 14 and the friction washer 17, and the locking ring 182 and the locking ring 183 are locked. The tapered surface is only used to exert an axial force on the worm wheel 14, and it will also cause certain deformation and wear to the friction washer 17 as in the above structure. Once it is used for a long time or when the lens barrel seat is equipped with a large lens barrel, it will still easily appear. Slip phenomenon

[0005] Therefore, the existing electric theodolite clutch locking mechanism only realizes the axial clamping between the worm wheel (gear) and the pitch angle rotating shaft, but cannot realize the axial and radial complete clamping between the worm wheel and the pitch angle rotating shaft. tight, and the radial clamping force is an extremely important factor for the installation of a large lens barrel, otherwise due to the self-weight of the large lens barrel and the gradual loss of the friction of the friction plate, the phenomenon of rotation and slippage will occur. Therefore, the existing electric theodolite clutch The locking mechanism cannot adapt to the installation of a large lens barrel

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