Question

Why semi cone angle of clutch is greater than friction angle?

Answer 1

Answer:

The torque transmitting capacity of cone clutch increases as its semi vertical angle increase. Explanation: Torque transmitted is inversely proportional to the sin of the semi vertical angle. 4. When semi vertical angle is greater than angle of static friction, clutch results in self-engagement.

Answer 2

Answer:

To avoid self-engagement in the cone clutch, its semi-cone angle is always kept greater than the angle of static friction.

Explanation:

• A cone clutch consists of inner and outer conical surfaces.
• The outer cone is keyed to the driving shaft, while the inner cone is free to slide axially on the driven shaft due to splines as shown in the figure.
• They are simple in construction and are easy to disengage. However, the driving and driven shafts must be perfectly coaxial for efficient functioning of the clutch.
• Cone clutches are friction clutches.
• To avoid self-engagement in the cone clutch, its semi-cone angle is always kept greater than the angle of static friction.