(!)Due to Microsoft's end of support for Internet Explorer 11 on 15/06/2022, this site does not support the recommended environment.
Instead, please kindly use other browsers like Google Chrome, Microsoft Edge or Mozilla Firefox.

7 Million Products, 2,000 Brands.
50,000 Stock items for Same Day Ship Out.

All Categories

Search by Application

inCAD Library

Brands

Brand List

Webcode Seach | Series: #CODE

Keyword suggestions

Part number suggestions

Discontinued Products

Usage Example of Booster Mechanism (Fundamentals of Booster Mechanism)

Part 5 in the Fundamentals Series. Could you move the earth using leverage? An introduction to booster mechanisms with examples of how levers, toggles and crank mechanisms are used

Boost mechanisms and lever mechanisms
Toggle mechanism
Usage example of booster mechanism

Usage example of booster mechanism (1) Simple press using a lever

Usage example of booster mechanism_1

The mechanism shown in Fig. 5 is a simple press that combines a bell crank and a toggle joint crank.
Force (F0) applied to the bell crank handle gains booster (F1) by the booster mechanism in proportion to the arm length ratio,
and this force is supported by the press housing. That reaction force is redirected in the opposite direction by the toggle joint to become the pressing force (F1').

Application example of booster mechanism (2) Press using a crank and toggle mechanism

Application example of booster mechanism_1

Application example of booster mechanism_2

The mechanism in Fig. 6 is a press in which crank OA uses an eccentric disk so that the disk weight presses the workpiece when the disk center (=center of gravity) is below the center of rotation O.
In that, a crank and toggle mechanism is used.
Fig. 7 is a vector diagram of this mechanism, and a vector comparison of the forces at link A and machining point B shows that a boosting action is obtained.
In other words, F0 is increased by using an eccentric disk, and then the piston deflects it vertically to obtain the press force Fp with this mechanism.

How long of a lever is needed to move the earth?

“Give me a lever long enough and a fulcrum on which to place it, and I shall move the world.” So goes the saying by Archimedes.
So, can the earth be moved with a lever? If possible, how long does the lever need to be? Let’s calculate it.
Assuming that the weight of the Earth is 5.9736 × 10²⁴ kg, or approx. 6 × 10²⁴, and that Archimedes' weight is 50 kg and the distance from the fulcrum to the point of action is 1 km, the distance d from the fulcrum to the point of effort can be found assuming that the moment at the point of effort is balanced by the moment at the point of action.

Distance from the fulcrum to the point of effort

50kg	×	d	＝	6×10²⁴kg	×	1km
Archimedes' weight (force applied at the point of effort)		Distance from the fulcrum to the point of effort		Weight of the Earth		Distance from fulcrum to the point of action 1 km

d	=	6×10²⁴ kg × 1km	=	1.2 × 10²³ km
		50kg

If the distance from the fulcrum to the point of effort is 1.2 × 10²³ km and the distance from the fulcrum to the point of action is 1 km, the required lever length is 120,000,000,000,000,000,000,001 km.
It takes approx. 120,000,000,000,000,000,001 hours by plane flying at 1,000 km/h.
Even assuming that a person lives to 100 years, the distance would be 136,986,301,000,000 hours, so it would take approx. 136 trillion hours to fly there.
Unless people's lifespans increase dramatically, this will be impossible to achieve.