What is a standard gear? What is standard installation? What is the standard center distance?
The gear modulus, pressure angle, addendum and root height are all standard values, and the gear with the thickness of the index circle and the width of the teeth is equal to the standard gear
The center distance of the standard gear according to the backlash without teeth is called the standard installation center distance of the standard gear, and the standard gear is installed at the center distance of the standard top gap, also called the standard installation center distance.Standard installation, a = a 'R' = R, a = R1r2
The gear modulus, pressure angle, addendum coefficient and gap coefficient are all standard values, and the tooth thickness is equal to the width of the teeth. Such gears are called standard gearsThe center distance of the standard gear according to the backlash without teeth is called the standard installation center distance of the standard gear, and the standard gear is installed at the center distance of the standard top gap, also called the standard installation center distance.Standard installation, a = a 'R' = R, a = R1r2The installation of a pair of gears engaged in meshing transmission, the misalignment between the pitch circle and the dividing circle, is called nonstandard installation, in which the center distance is called nonstandard installation center distance. There is backlash on the side of the tooth, resulting in a decrease in coincidence and a poor stability. Standard does not depend on the installation accuracy, to see the relevant books on mechanical design will know!
The installation of a pair of gears engaged in meshing transmission, the misalignment between the pitch circle and the dividing circle, is called nonstandard installation, in which the center distance is called nonstandard installation center distance. There is backlash on the side of the tooth, resulting in a decrease in coincidence and a poor stability. The standard does not depend on the installation accuracy.The standard center distance of gears is designed according to the principle that the gears are meshed without backlash. The gear backlash is 0 at the normal center distance. Because of the tolerance of gear manufacture, it is easy to clamp because of insufficient backlash. Gear overlap generally requires more than 1.2.
