Analysis on Structure and Transmission Principle of Live Gear Reducer

More and more places are used in the life of the reducer. This paper analyzes the structure and transmission principle of the movable gear reducer. Active tooth reducer structure and transmission principle The motion analysis of the various components of the movable tooth reducer is as follows.

The shock absorber is an input device, the cage is an output device, and the center wheel is fixed. The eccentric shocker rotates around the eccentric point, the roller rotates in the cage and rotates around the eccentric point B. During the rotation of the roller, the roller and the shock absorber are always tangent, that is, the geometric center of the roller and the geometry of the shock absorber The distance between the centers remains the same, and the distance between the geometric center of the roller and the eccentric point is constantly changing, since the center wheel is stationary and always in contact with the roller.

Therefore, its contour shape is an outer envelope formed by the roller along the center of the roller. To obtain the tooth profile of the center wheel, it is necessary to first calculate the curve equation of the roller trajectory. The envelope generated along the trajectory of the roller is centered on the theoretical trajectory. The relationship between the radius of the roller and the radius of the shock absorber is different from that of the outer oscillating line. There is no integral multiple relationship, which is more flexible for designing the reducer. Reduce the weight and volume of the reducer.

The rotation angle of the roller with the rotation of the movable rack changes periodically. In one cycle, the relative speed changes from small to large, from large to small, from small to large, and then from large to small. The maximum value and a minimum value. Curvature of the center of the movable tooth The curvature of the center tooth profile curve indicates the degree of bending of the tooth profile curve near the point. It depicts the geometrical characteristics of the tooth profile curve and is based on the study of the bearing capacity and lubrication state of the movable tooth drive. Important parameters. The center of the tooth has the largest curvature and the smallest radius of curvature; the curvature decreases to zero along the tooth profile and continues to decrease to a negative value.

In the strength check, the calculation result can be made more realistic according to the radius of curvature. The slip rate of the movable tooth drive understands the characteristics of the slip rate and contributes to the development of a reducer with low wear, long life and high meshing efficiency. The wear law of the tooth shape depends to some extent on the variation of the relative sliding speed of the tooth profile at the contact point.

A new method for solving the tooth profile of the movable tooth reducer is to draw the tooth profile curve and realize the parameterization of the movable tooth drive design. And thus draw the speed curve, curvature curve, slip rate curve. The motion law of the components of the movable tooth transmission is obtained from the information of the equation curve, which lays a foundation for further research on the movable tooth transmission.

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Label: Analysis of the structure and transmission principle of the movable tooth reducer

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