Gear and rack meshing characteristics and conditions

The characteristics and conditions of rack and pinion meshing are as follows, for reference.

Gear and rack meshing characteristics:

1,Gear rackWhen meshing, the meshing line is a fixed straight line.

2. When the gear meshes with the rack, the index circle of the gear always coincides with the pitch circle regardless of whether it is installed in a standard manner.

Gear and rack meshing conditions:

gearThe conditions for meshing with the rack are: equal modulus and equal tooth profile angle (pressure angle).

1. If the gear is a standard gear, the distance is the radius of the gear index circle.That is, the index line of the rack ((standard rack) is tangent to the index circle of the gear.

2. If it is a variable gear, when designing a rack, you can always find out and calculate the pitch circle of the gear and the pitch line of the rack. The pitch circle of the gear is tangent to the pitch line of the rack, and the distance is the pitch circle. radius.

The above instructions include but are not limited to, if you have more questions or related processing needs, you can consult EP free of charge.