Yancheng XINLAN Precision Machinery Co., Ltd.

According to the different tooth line shapes in the expanded view of the pitch cone,Bevel gearIt can be divided into:

(1)Straight bevel gear

Straight bevel gears are the simplest type of bevel gears.The pitch bevel tooth line is a radial straight line, and each tooth line passes through the pitch cone tip, and its gear tooth travels along the bevel generatrix direction, gradually shrinking in proportion from the large end to the small end of the gear truncated cone, and finally meets two in space MeshingGear shaftIntersection.

(2) Spiral bevel gear

In the expanded view of the pitch cone surface of the spiral bevel gear, the pitch bevel tooth line is tangent to the concentric circle of the pitch cone axis, so it is also called the cut bevel gear.Compared with straight bevel gears, it has the same advantages as helical cylindrical gears: less impact load and smoother operation.However, due to its low productivity and performance inferior to the spiral bevel gears that can be mass-produced on special high-efficiency machine tools, they have been gradually replaced by the latter and rarely used.

(3) Zero degree spiral bevel gear

Zero-degree spiral bevel gear refers to a spiral bevel gear whose midpoint helix angle is zero degrees.It has the same direction as a straight bevel gear, but the gear teeth are curved.This kind of gear is processed on a machine tool for processing ordinary spiral bevel gears (that is, arc bevel gears), so like ordinary spiral bevel gears, some (points) can contact the tooth surface. This is a zero-degree spiral bevel gear. Compared with the advantages of ordinary straight bevel gears.Zero-degree spiral bevel gears and straight bevel gears produce the same supporting load.Therefore, when their supports are the same, the two gear pairs are interchangeable.

(4) Spiral bevel gear

The spiral bevel gear has a curved pitch bevel tooth line.The contact area of ​​the tooth surface starts from one end of the tooth and gradually moves to the other end.Like the meshing process of a spur bevel gear, the meshing process is accompanied by the movement of the contact point along the tooth height of the tooth profile.Due to the overlap of the end faces of the gear teeth, at least two pairs of gear teeth mesh at the same time (several pairs of gear teeth mesh at the same time).Therefore, compared with straight bevel gears and zero-degree spiral bevel gears of the same size (same modulus), spiral bevel gears can transmit more loads and work more smoothly.Especially when running at high speed, its noise and vibration are significantly reduced compared to the other two gears.The minimum number of teeth of spiral bevel gears can be reduced to 6 or even 5, so the transmission ratio is higher than that of straight bevel gears.