An electric theodolite clutch locking mechanism

Abstract

The invention relates to an electric theodolite clutch locking mechanism, comprising a lens barrel base and a pitch angle rotation shaft fixedly connected with the lens barrel base, the lens barrel base is fixedly arranged on one end of the pitch angle rotation shaft, and the other end of the pitch angle rotation shaft is connected to the There is a clutch handwheel, and the outer circumference of the pitch angle rotating shaft is sequentially set with deep groove ball bearings, gears, holding rings, holding ring compression rings and plane needle bearings from the lens barrel seat to the direction of the clutch handwheel. The outside of the pitch angle rotating shaft has a shell that covers the deep groove ball shaft, gears, clamping ring, clamping ring pressing ring and plane needle bearing. The shell has a motor and a worm, and the worm and the gear are in the motor. Engage the drive under action. The present invention has the following advantages: the axial clamping force and the radial clamping force exerted on the clamping ring by the clamping ring compressing ring greatly improve the clamping effect of the gear and the pitch angle rotating shaft, avoiding the increase of the large lens barrel The rotation after installation is slippery.

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

Images