1. Characteristics of motion in transmission systems
http://prezi.com/dzcjagebuomb/motion-transformation/
The most common motion transformation systems in technical objects are described below
1. RACK AND PINION SYSTEMS
Possible transformations:
Rotation ---> Translation
or
Translation --->Rotation
Reversebility: YES
These systems contain at least one gear called pinion and one straight bar with teeth called a rack.
The greater the number of teeth of the pinion, the slower its rotation.
2. SCREW GEAR SYSTEMS.
Possible transformations:
Rotation ---> Translation
Reversebility: NO
The screw is the driver and its rotational motion is transformed into the translational motion of the nut.
The nut must be connected to the screw in such a way that the nut can rotate..
The threads of the nuts and screws must match
3. CAM AND FOLLOWER SYSTEM
Possible transformations:
Rotation ---> Translation
Reversebility: NO
These devices transform the rotational motion of the cam into the reciprocating translational motion of a follower, in other words, a back and forth movement like that of a sewing machine needle
4. SLIDER -CRANK MECHANISMS
Slider-crank mechanisms are used in internal combustion engines for example to transform the rotational motion of the pistons into the rotational motion of the crank, causing the wheels to turn
The connecting rod contains two bushings to attach it to the crank and piston.
The cylinder must guide the part moving in the translation
The system requieres frequent lubricationn