Related Resources: calculators
Toggle Clamp Equations and Calculator
Machine Design Applications
Application Engineering and Design
Toggle Clamp Equal Length Arms Equations and Calculator
A link mechanism commonly known as a toggle joint is applied to machines of different types, such as drawing and embossing presses, stone crushers, etc., for securing great pressure. The principle of the toggle joint is shown by Fig. 1. There are two links, b and c, which are connected at the center. Link b is free to swivel about a fixed pin or bearing at d, and link e is connected to a sliding member e. Rod f joins links b and c at the central connection. When force is applied to rod f in a direction at right angles to center-line xx, along which the driven member e moves, this force is greatly multiplied at e, because a movement at the joint g produces a relatively slight movement at e. As the angle α becomes less, motion at e decreases and the force increases until the links are in line.
Figure1
Figure 2
Preview: Toggle Clamp Equal Length Arms Calculator
2P sinα = F cosα
or
P = ( F cosα ) / ( 2 sinα )
or
F = ( 2P sinα ) / cosα
Where:
P = Reaction force / resistance (N, lbs)
F = Applied Force (N, lbs)
α = Angle (deg.)
Reference: Machinys Handbook, 27th Edition