Published on March 10, 2014
INTRODUCTION APPLICATION PARTS HYDRAULIC ACTUATION PRESSURE IN THE SYRINGE TYPE OF ROBOT ARM SAFETY PRECAUTION CONCLUSION FUTURE SCOPE REFRENCE
A mechanical syringe actuated arm which is hydraulically operated and controlled by syringes filled with some fluid. It consists of various parts connected to each other in a pre-designed manner which are guided in a constrained way to obtain required output.
These arms are used in assembly lines of mega factories to assemble various parts of a product and also to paint vehicles. They are also used in earth movers to pick up heavy weight and keep them where required. Same principle is being used in JCB’s, automobile lifters, etc.
In the mechanism, each part has been provided with certain degree of freedom to move in a constrained way to guide other parts and also to pick up small weight items and to place them wherever required. The complete mechanism consists of a fixed vertical link. To its free end is connected or better to say hinged, another horizontal link which is free to oscillate about that hinge in an up-down way of motion.
To this link is connected a slotted type mechanism which consists of a slotted box which itself can oscillate about its hinge and in it is a sliding link which can come out of the slot to have the slider like motion. To this slider is connected a surface, underneath which are attached 4 spoons acting as arm to pick up the items. The entire mechanism is fixed on a rack and pinion type mechanism to allow degree of freedom of the mechanism as a whole to rotate by 130degrees.
All the movements are controlled hydraulically by syringes attached to each one. The hydraulic supply acts like the arm’s heart and muscles. It provides the energy for pushing, pulling, turning and lifting.
When pressing on the syringe system, be sure to press only the input plunger with your thumb and hold the output syringe with your other hand to prevent the syringe from separation Do not use syringe as a “squirt gun”. Wear safety glasses. Follow all normal laboratory rules.
The prepared mechanism has been successfully constrained and executed to carry out the required work of picking up the weight of objects like table tennis balls and to put them into glasses placed at different location.
If more time and more efforts would have been put into the model, more complexities could have been brought out. Moreover instead of manual operation of syringes could have been replaced by pre-defined computer programs or merely by pressing the switch operated. Further, more varieties and more flexibility to add or replace any part according to requirements can be done to improve its use and increase field of usage and to make it more universal or flexible.
http://www.instructables.com/id/Hydraulic- robot-made-of-cardboard-and-scotch- duct-/ http://www.youtube.com/watch? v=6xljw4yoe9A
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