Ok, I had discussed all the hydraulic, pneumatic, electric actuators ……..and now I am going to discuss the mechanical actuators….. Let me show you about the important system (mechanical actuators) or subsystem that are used in robotics and Mechatronics.
To convert the rotary motion into linear motion.
these are mainly used in steering system , screw jack, ball screw, roller screw, cam rotation etc.there are some sub mechanism that are used to produce specific type of linear motion.A screw jack is basically like a actuator which convert the human effort provided on the lever (rotary motion ) into linear up and down motion of the ram .these are mainly used to lift out the heavy weight of a car, truck during the assembly of tyres, wheels, etc. similarly cams are generally used to valves operations
cams mainly used in internal combustion engine to operate the valves.cams are used where time period is required. cams may oscillate, rotates, or also reciprocates according to the requirement of motion and imparts the motion (reciprocation, rotation, oscillates ) to the other body called followers.
During the high load application mechanical actuators may actuated with the help of motors,or also used hydraulic pressure to increase the effort of mechanical actuators.
- THERE ARE SOME MAIN ADVANTAGE OF THE MECHANICAL ACTUATORS
- force amplification with the help of levers
- speed may change according to the driver requirement with the help of gears
- transfer the rotation from one axis to another axis with the help of chain, belts
- produce special types of motion like quick return mechanism, two & fro motion