What are internal and external gears?- Ningbo Fenghua Fuyin Auto Cage Accessory Factory

What are internal and external gears?

Jun 17,2022

1. External gear: the tooth on the outer circle is the external gear, and the tooth on the inner circle is the internal gear. External gears are very common in machinery. Generally, the circumference of the dividing circle is: l=m*z.

2. The inner gear is ring-shaped, the outer ring is smooth, the inner ring has teeth, the outer gear is original disc-shaped, and the outer ring has teeth.

3. The principle of internal gear and external gear is completely consistent (referring to the principle of involute and gear). It's just that the grooves of the internal gear are equivalent to the teeth of the external gear. For example, the top cutting of the internal gear is equivalent to the root cutting of the external gear. When designing and calculating the parameters of the internal gear, it is enough to regard the tooth slots as the teeth of the external gear.