The CAD System Design Of Higher-order Deformed Elliptic Gears And Its Kinematic Properties Analysis

This thesis comes from the National Natural Science Foundation, the research goal ishigh-end CAD systems oval gear multi-segment degeneration research and design,while using correlation analysis software were analyzed in terms of its kinematics.High-end multi-segment degeneration oval gear is a new non-circular gear, which canbe achieved between two parallel shaft gear ratio function default drive. Non-circulargear combines traditional round gear and cam mechanism with variable transmissioncan be achieved by a given transmission ratio can be designed and manufactured inaccordance with the requirements of high-precision movement, etc., can be achieved incombination with other agencies swing oscillation and intermittent, and other complexmotion. Thus, the prospect of non-circular gears very broad application prospects inparticular, has great potential in the instrumentation, textile machinery, agriculturalmachinery, construction machinery and other occasions. But so far, the non-circulargear has not been widely applied to real life to go, mainly because of the non-circularshape of the gear is extremely complex, there is no law at all, resulting in processingdifficulties, long design time, it is difficult for mass production. But with growingcomputer-aided design and CNC technology, this phenomenon has been characterizedby change rather than circular gear is its radius of curvature of the curve section variablecenter of rotation to engage the node to the trails is also variable, and thus in a meshingprocess for non-circular gears, the transmission ratio is changing. High-leveldegeneration oval gear is a very complex gear pitch curve equation, if the traditionalmethods are difficult to draw gear can draw out the gear tooth profile section curves andlines. Based on the principle of forming a high-level multi-segment degeneration ovalgear, to carry out the following main research:First, based on the principle of non-circular gears and differential geometry and otherrelated theories, mathematical models of the main design parameters of the modulus ofthe high-level degeneration oval gear section curve equation, tooth profile curveequation, such as the transmission ratio equations were deduced, and thus based on theestablishment of a new high-level variability applies to any oval pitch curve parametricdesign system, which has a perimeter check, checking eccentricity, automatic drawinghigh-end multi-segment degeneration oval gear pair by entering the relevant designparameters gear and other functions; study of non-circular gear tooth profile design and manufacturing process of non-circular gears, comprehensive comparison ofvarious non-circular gear tooth profile drawing method, taking one of the most easy tograsp, more convenient method of drawing, and in the process deduced correlationcurve equation; correlation using simulation software discussed eccentricity, kinematiccharacteristics of the various parameters change the order of the driving wheel and thedriven wheel, and the initial order of the input angular velocity than its transmissionratio from the rotation angle characteristic and impact of changes in the relationshipbetween driving wheel angular acceleration characteristics; reveals the high-endmulti-segment degeneration oval gear changes of the various effects of kinematicparameters to determine the design principles of high-end multi-segment degenerationoval gear. This study is a high-end multi-segment degeneration associated oval geardesign, manufacture, analysis and experiments provide the basic theoretical andexperimental evidence in favor of the promotion and application of high-endmulti-segment degeneration oval gear.