| High frequency reciprocating motion is widely used in many occasions of engineering; the traditional way is to use a fixed speed motor as a power source to achieve reciprocating rotation through various transmissions and actuators. Although such mechanism has a high load carrying capacity, operating speed and production efficiency, satisfied the requirements of mass production well, but there are also some problems about this way. On one hand, it needs to change the movement pattern in the middle through the complex mechanism, moreover due to the presence of inertia force; the low transmission efficiency also leads to the waste of energy. On the other hand, it’s difficult to adapt to the diversity of product variety because of lack of flexibility. However if servo motor drive actuator directly, owing to the bottleneck of technology, the servo motor with large inertia, reciprocating carrier and fast response under the condition of high-frequency is difficult to produce. With the improving of modern industrial automation level and the development of products diversity, lots of new requirements are requested for the reciprocating rotation mechanism. At first it should tend to be controlled with high degree of automation. At same time, the speed and dynamic process should be controlled to meet the needs of product diversification.On the basis, the main contents of the thesis are as follows:1. Design the non-circular planetary gear train on the basis of circular gear train and complete its different configurations, analyzing that for reciprocating rotation output through entering unidirectional rotational motion.2. Give the non-circular gear pitch curve design method of non-circular gear train that could convert the unidirectional rotating input into reciprocating rotation output and establish appropriate model, using simulation software to simulate the dynamic characteristics of the non-circular gear train.3. Study that for further expansion reciprocating rotation in the form of diversity, using servo motors drive oval gear differential gear train, non-circular gear differential gear train to get adjustable swing amplitude reciprocating rotation output as well as swing center’s movement of the swing rotary output with simulation to reduce the servo motor’s driving requirements in large changes of torque.4. Study the application of servo drive non-circular gear train in comber detaching roller, optimize servo motor input parameters and gear train parameters to get the best overall performance of the mechatronic device.5. Design non-circular gear train directly according to the requirements of the output process law,get the non-circular gear pitch curve to meet the process requirements.The more direct and effective method has decreased the angular acceleration of the servo motor greatly as well the requirement on motor is reduced.The servo-driving non-circular gear train has a collection of cams, gears and gear train:both variable speed transmission, easily controlled of the cam and accurate, efficient transmission, overloaded balance of the gear, and compact, small size, large carrying capacity, high efficiency and long life of gear train. The use of double servo drive on non-circular gear differential gear train could synthesize double single-way rotation movement to a reciprocating rotation movement and simultaneously output various movement pattern reciprocating rotation, and greatly reduce the requirements of the servo motor characteristics; better to meet the different requirements of practical application than conventional mechanisms that could achieve reciprocating rotation. This mechatronic device can be embedded to a whole system as a module to improve the level of mechatronic of the system with a strong practical significance, and well meet the development needs of multi-species, high-performance, small-batch of the modern industrial machinery. |
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