Characteristics of gear rack meshing transmission

In fact, the combination of the tooth and gear is a special method. The sprocket bar is like a straightened and stretched one. This kind of transmission is not only a circular operation completed by itself, but also a form of force transmission through which it can run on the bar.

Compared with the composition of gear, its important characteristics are as follows

(1) The tooth profile is straight, so all the normals on it are parallel. In the case of transmission, it operates as a straight line, and its speed and direction are the same. All the tooth angles on it are the same. The standard inclination angle of the straight line is 20 degrees.

(2) The square tooth profile on the same side of each tooth is relatively parallel, so whether it is on the indexing line or on the indexing line of the top rack, the tooth thickness and groove width are the same, which is the reference line to ensure the size of each position.