Features of helical gear transmission:
1. Only by continuously changing the helix angle, the diameters of the two wheels can be arbitrarily selected according to the distance from the center at the same time. Alternatively, if the diameters of the two wheels are constant, it is possible to vary the propeller angle to obtain different gear ratios.
2. By changing the direction of the two-axis rotation angle, the rotation direction can be changed from the driving wheel.
3. In addition to the sliding speed of the middle helical gear in the gear direction, the relative sliding speed of the middle gear teeth in the tangential direction also exists. In the transmission of gears, the sliding speed of the teeth increases the wear of the teeth, but in some cases, the sliding speed of the teeth is the cutting speed.
4. Helical gears are easier to manufacture than bevel gears and the price is relatively cheap.
5. Due to the point contact of the tooth surfaces of the two wheels, the contact stress is large and the wear is large.
Advantages and disadvantages of helical gears:
1 Because the meshing surface changes from small to large to small, the meshing is stable, the impact is small, and the noise is low;
2 large carrying capacity, improve life and stability;
3zmin is small and not easy to undercut, small in size;
4 But the axial thrust is large, the herringbone gear - no axial thrust, but it makes trouble..
Helical gear transmission is composed of two helical gears meshing together.
Purpose: to transmit the motion between two phases in space.
Features:
1 The helical direction can change the center distance and the transmission ratio
2 steering can be changed by screw rotation
3 wear fast
4 points of contact
5 small axial force
