Bevel gear reducers
Introduction
A bevel gear is a type of gear in which the axes of rotation of the two rings intersect, which are coupled to each other and whose teeth are conical in shape. Bevel gears are most often mounted on shafts that form 90 degrees, but they can also be designed to work at other angles.[1] Their passing surface is a cone "Cone (geometry)").
Two important concepts in gearing are inclined surface and angle of inclination. The pitch surface of a gear is the imaginary toothless surface that would be obtained by averaging the peaks and valleys of the individual teeth. The pitch surface of a spur gear is in the shape of a cylinder. The inclination angle of a gear is the angle between the face of the inclined surface and the axis.
The most familiar types of bevel gears have tilt angles of less than 90 degrees and are therefore cone-shaped. This type of bevel gear is called external because the gear teeth point outward. The pitch surfaces of external bevel gears are coaxial with the gear axes; and the vertices of the two surfaces are located at the intersection point of their two axes of rotation.
Bevel gears that have tilt angles of more than ninety degrees have teeth that point inward and are called internal bevel gears.
Bevel gears that have tilt angles of exactly 90 degrees have teeth that point outward parallel to the axis and resemble the tips of a crown, which is why this type of bevel gear is called a crown.
They are called miter gears when the two rings have the same number of teeth and their axes form a right angle.
Oblique bevel gears are those whose teeth are arranged at a certain angle with the guidelines of the pitch surface.
Guys
Bevel gears are classified into different types depending on their geometry:.
miter gears
Miter gears are a special case of bevel gears that have the same number of teeth. The shafts are set at right angles to each other, and the two rings have matching pitch surfaces and angles, with a conical pitch surface.[2].