A force is applied from a certain distance from the point of application, and the object under the force is subjected to rotational force. This chapter explains the effect of the force at this time.(1) Moment
- A force is applied from a certain distance from the point of application, and the object under force is subjected to rotational force. The effect of the force at this time is called moment.
- The farther the torque is from the point of application of the force, the more the effect is proportional to the distance.
- The distance from the center of rotation to the point where the force acts (linear distance) is called the force arm.
- Taking the seesaw as an example, it may be easier to understand by imagination. (Refer to Double Force Structure-3 (Elements of Mechanism Fixture))
In the seesaw part of the above figure, from the relationship between the force Fa and the arm length a, the moment M can be obtained by the following formula.
| M = Fa x a |
This principle is often used in many structural structures such as the cam pressure plate mechanism (the following figure: rotation → linear conversion mechanism 5 (element of the mechanism clamp)) and the lever mechanism (wrench tightening).
