Stossfreie tourenkupplung für hohe arbeitsgeschwindigkeiten

Abstract

The present paper reports on the development of principles allowing a considerable improvement in the efficiency of rotating couplings. A block diagram is shown in Fig. 2. The constant angular input velocity ω 0 is transformed by a step gear into a progressive stepping motion with the intermittent angular velocity ω A (0 ⩽ ω A max ω A ), and fed to a clutch with torque transmission through a positive connection. Establishing and releasing this connection is performed through response to control signals whenever the angular velocity ω A = 0. The control signals are generated by a synchronizing unit, a logical operation being carried out between the external coupling instructions and clock pulses identifying the angular velocity ω A = 0. Since the angular velocity difference between the input and output of the clutch is zero during the coupling action, the driven side is moved harmonically. The three gear drive and the cycloidal step gear for generating the stepping motion, as well as an electromagnetic drive for the clutch, are represented as self-contained function units for the technical implementation of the above principles. The step gears feature a shock- and jerk-free motion transmission with near-dwell. The near-dwell and the coupling time of the clutch are coordinated such that high working speeds are obtained from the rotating coupling. Theoretical considerations about the particular function units are complemented by essential suggestions concerning design and production engineering. The test results listed refer to both the individual function units and the entire coupling. The step gears can be used successfully when step angles of 360° or 180° are desired, with stepping frequencies of up to 50 Hz and higher. The electromagnetic drive enabled coupling times of less than 2 miliseconds to be obtained. In the long-duration test, 2.6 (10) 6 stepping cycles were attained (for Vf S = 35 Hz with J A = 250 gcm 2) by means of the full-revolution coupling, and 4(10) 6 stepping cycles (for f S = 50 Hz with J A = 250 gcm 2) by means of the half-revolution coupling without disturbances having occured. The results prove the fact that an ingenious combination of mechanism engineering on the one hand and of electromechanics and electronics on the other hand can produce assemblies of high efficiency.