This document presents information on gearless power transmission. It discusses the limitations of geared power transmission and how gearless transmission can transmit power at different angles without manufactured gears. The document describes the concept and working of an elbow mechanism, which uses three bent links to transmit torque between shafts at 90 degrees. It can also transmit power between shafts at angles from 90 to 180 degrees. Advantages include simple design, flexibility, and cost efficiency. Applications discussed include use in elbow engines, socket wrenches, drilling machines, and some home appliances.

1. A Presentation on
GEARLESS POWER TRANSMISSION
(Minor Project Work)
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Presented by: - Guided by: -
Utsav Patel (ID…….) ……..……………...
From: - .................................
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2. NEEDS OF GEARLESS POWER
TRANSMISSION LIMITATIONOF GEARED POWERTRANSMISSION
1. DESIGNOF GEAR
2. MANUFACTURINGOF GEAR
3. FLEXIBILITY
4. COST
 TRANSMITTING POWER AT DIFFERENT ANGLES WITHOUT ANY GEARS BEING
MANUFACTURED.

3. CONCEPT
 GEARLESS POWERTRANSMISSION WORKS ON “ELBOW MECHANISM”.
 IT IS A RIGHT-ANGLE CONSTANT VELOCITY JOINT, IN WHICH RODS BENT 90° ARE
ABLETOTRANSMITTORQUEAROUNDA CORNER.

4. WORKINGOF ELBOW MECHANISM
 IT TRANSMITS THE POWER BETWEEN TWO SHAFTS WHOSE AXES ARE AT 90°. IT
USES THREE BENT LINKS WHICH SLIDES RELATIVELY ACCORDING TO THE MOTION
GIVENTO INPUT SHAFT.
 THIS SLIDING MOTION OF THE BENT LINKS IS CONVERTED INTO THE ROTATIONAL
MOTION OFTHE OUTPUT SHAFT.

5. UPGRADATION
 IT ALSO TRANSMIT THE POWER
BETWEEN TWO SHAFTS AT DIFFERENT
ANGLES FROM 90° TO 180°.
 WE CAN USE MORE THAN THREE BENT
LINKS IN ORDDER TO GET SMOOTH
MOTIONTRANSFER.

6. ADVANTAGES
 SIMPLE IN DESIGN
 EASYTO MANUFACTURE
 FLEXIBLE
 COST EFFICIENT
 FREEDDOM OF INTERCHANGEABILITY
 EASYTO COOL
 HIGH EFFICIENCY (APPROX. 92%)

7. LIMITATIONS
 IT CAN BE USED FOR LOWTO MEDIUM LOADAPPLICATIONS.
 IT REQUIRED HIGH STARTINGTORQUE.
 SPEED RATIO IS ALWAYS CONSTANT 1:1.
 LINKS HAVETO BE REPLACEDAFTER CERTAINTIMEOF OPERATION.
 IT CAN NOTTRANSMIT POWER BETWEENTWO SHAFTS AT ANGLE LESSTHAN 90°.

8. APPLICATION
 EARLIER, IT HAS BEEN USED IN ELBOW
ENGINES. WHERE THIS JOINT IS KNOWN AS
HOBSON’S COUPLING.
 IT IS ALSO USED AS AN EXTENSION
FOR A SOCKETWRENCH.

9. APPLICATION
 ALSO USED FOR ANGULAR DRILLING
BETWEEN 0°TO 90° POSITTION.
 LUBRICATION PUMP FOR C.N.C. LATHE
MACHINE.
 IT USED IN SOME HOME APPLIANCES
SUCHAS JUICERSAND MIXTURES.
 IT CAN BE USED IN AUTOMOBILES &
ROBOTICSAPPLICATIONS.

10. THANKYOU