Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications!

Toggle Joint

A toggle joint mechanism can be used to multiply force.

Sponsored Links

Toggle joint mechanism

The toggle mechanism is made of two arms linked together. Point 1 is fixed, point 3 can move horizontally (as indicated in this principal drawing). The effort force acts vertically in point 2. 

The horizontal force acting in point 3 can be calculated for arms with equal or unequal lengths.

Arms with equal lengths

P = F a / 2 h                            (1)

where

P = horizontal force in point 3 (N, lb)

F = effort force (N, lb)

a = length (m, ft)

h = height (m, ft)

Arms with unequal lengths

P = F a / b                             (2)

where

b = length (m, ft)

Example - An Improvised Press for Replacing Car Bushings

A press to remove/refit bushings in car linkage arms can be improvised with two pieces of lumber:

toggle joint - improvised bush press

The effort force acting on the toggle joint (in point 2) with a person with weight 90 kg can be calculated as

F = (90 kg) (9.81 m/s2)

  = 883 N

The force acting on the bush (in point 3) can be calculated as

P = F a / 2 h

   = (883 N) (1983 mm) / (2 (258 mm))

   = 3393

The force ratio is 

 Fr = (3393 N) / (883 N)

    = 3.8

- the initial effort force is amplified near four times

Toggle Joint Calculator

This calculator can be used to calculate the resulting force in a toggle joint with arms with equal lengths. The calculator can be used for imperial and metric units as long as the use of units are consistent.

Note that kg is the SI unit of mass - check the difference between mass and weight (force).

Sponsored Links

Related Topics

  • Mechanics

    Forces, acceleration, displacement, vectors, motion, momentum, energy of objects and more.

Related Documents

Sponsored Links

Search

Search is the most efficient way to navigate the Engineering ToolBox.

Engineering ToolBox - SketchUp Extension - Online 3D modeling!

3D Engineering ToolBox Extension to SketchUp - add parametric components to your SketchUp model

Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with older versions of the amazing SketchUp Make and the newer "up to date" SketchUp Pro . Add the Engineering ToolBox extension to your SketchUp Make/Pro from the Extension Warehouse !

Translate this Page

Translate this page to Your Own Language .

About the Engineering ToolBox!

Privacy Policy

We don't collect information from our users. More about

Citation

This page can be cited as

  • The Engineering ToolBox (2018). Toggle Joint. [online] Available at: https://www.engineeringtoolbox.com/toggle-joint-d_2077.html [Accessed Day Month Year].

Modify the access date according your visit.

3D Engineering ToolBox - draw and model technical applications! 2D Engineering ToolBox - create and share online diagram drawing templates! Engineering ToolBox Apps - mobile online and offline engineering applications!

Unit Converter

















































12.8.9

Sponsored Links
.