What are the helical gear parameters and what is the calculation formula?

What are the helical gear parameters and what is the calculation formula?Many users may not be very clear. The following is some information compiled by EP for your reference.

XNUMX. Description of helical gear parameters:

1. Helix angle β:

The angle between the gear teeth of the helical gear and the axis.The greater the helix angle β, the more inclined the gear teeth, the better the smoothness of the transmission, but the greater the axial force.

2. Modulus:

Factors that determine the size of the tooth.Gear modulus is defined as a basic parameter of modular gear teeth.For the calculation of modulus, click on the article "Gear module"View related instructions.

3. Pressure angle:

When a pair of conjugate tooth profiles mesh at a point, the direction of the positive pressure on the tooth profile at that point (ie, the normal direction) is an acute angle between the direction of velocity at that point.Generally take 20 degrees.

4. Number of teeth:

The total number of gear teeth on the entire circumference of the gear is generally represented by the letter Z.A gear with the same number of teeth has a larger module, and its size is also larger.

5. Tooth pitch:

The length of the indexing arc between equivalent points on two adjacent teeth.

6. End face:

A plane perpendicular to the axis of the gear, the parameters on the end face are generally subscripted t.

7. Dharma:

For the plane perpendicular to the spiral, the parameters on the normal plane are generally subscripted n.

8. Addendum height coefficient:

It is the general parameter for calculating the tooth tip height. It takes the standard value, ha*=1 or 0.8. The tooth tip height is the distance from the gear circle to the index circle.

9. Top clearance coefficient:

It is the general parameter for calculating the tooth root height and the total tooth height. The standard value is taken, c* = 0.25 or 0.3.For standard gears, it is stipulated that C=C*m, C*C is the top gap coefficient.

XNUMX. Calculation formula of helical gear parameters:

Regarding the related content of helical gear parameters, if you have more questions or related processing requirements, you can contact EP Gear processing Technical staff free consultation, you can choose a suitable solution according to your actual application requirements!