The pressure angle is the point where the energy created by the application of pressure from the drive gear to the driven gear is maximum. It occurs when the gear teeth have fully meshed and is typically found just after the apex of the spoke.
The term pressure angle refers to the angle at which the driving force between two gears is maximum. It is the angle that puts the most pressure on the teeth or cogs of the two gears being pushed into each other. When the teeth of a gear mesh together, there is an amount of energy created through pressure and torque. When the gear teeth reach a certain point in their respective radii, especially in the case of drive gears, there is a transfer of energy between the two which is maximum when the gear teeth have reached the pressure angle.
The pressure angle is generally the point of the radius after the gear teeth have fully meshed. The teeth have begun to reach the apex of their radius. This occurs when the drive gear uses its teeth to push the driven gear in the direction determined by the design of the machine using the gears.
When the pressure angle is reached, the energy created by the application of pressure from the drive gear to the driven gear is usually sufficient to spin the driven gear and force it to do the job for which it is designed. This application can also cause another pressure angle within the gear system. This occurs especially when the driven gear is used to drive a drive belt or chain and the teeth of the gear are instrumental parts of the belt or chain movement.
When the gear teeth engage the belt, no matter which direction the belt is driven, pressure angles are created when the gear has turned enough to create force. That force exists behind the gear teeth and is then transferred into the belt. The angle here is the same point where the drive gear pushes the driven gear. Both gears are used to exert force in another medium.
The way a gear works on its axis is what creates the generation of the pressure angle, in a physical sense. The gear itself is used to drive something, whether it’s a belt or chain or even some other gear. Whenever the gear is used to engage another mechanism, there is a pressure angle at one point within the system. It is most typically found at the point after full contact between the gear and driven medium, or just after the apex of the spoke. Usually, since most mechanisms are in a vertical relationship, the pressure angle is shortly after a gear tooth has passed the most central point of the top of the gear’s rotation.
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