gearless transmission system
TRANSCRIPT
PREPARING A WORKING MODEL OF GEARLESS TRANSMISSION
A project on
BY•ATUL KUMAR (1010440014)•AKASH DEEP MAURYA(1010440002)•AMIT KUMAR PATEL(1010440005)•PHURBA BHUTIA (1010440055)•PRAWAL BISTA (1010440056)
OVERVIEW
Need of gearless transmission.What is gearless transmission?ApplicationsComparisonMaterialsSpecification and manufacturing of partsAdvantagesLimitationsPossible advancesConclusion
Need Of Gearless Transmission
Today’s world requires speed on each and every field.
Engineers are constantly confronted to the challenges of efficient transmission of power.
Gears are costly to manufacture.It is needed to further increase the efficiency of
transmission which cannot be done using geared transmission
Gearless transmission mechanism is capable of transmitting power at any angle without any gears being manufactured.
What Is Gearless Transmission?
Also called elbow mechanism
It is an ingenious link mechanism of slider and kinematic chain principle.
Transmits power at any angle without utilising gears
Working Principle
Transmits the power between two shafts whose axes are at 90 degree through bent links.
Three links slide relatively according to the motion given to input shaft.
Due to this, the rotational motion of input shaft is converted into sliding motion of links which is then converted to rotational motion of the output shaft.
GeneralLayout
Constructional details
Part Dimensions
Cylinder 60mm(dia.)
Shaft 15mm(dia.)
Links 10mm(dia.), 170mm (length)
Bearings 15mm (inner dia.)
Applications
Tower clocksGang drilling( multi spindle drilling)Lubrication pump for CNC latheAngular drilling between 0- 90 degreeMovement of periscope in submarinesUsed in vehicles (go-carts)Hand driven machines like juice makers sheet folding
machines etc.
Geared Gearless
Manufacturing methods-
Costly.manufactured on
special purpose machines
Complex calculations
No interchangeability
Manufacturing methods-Less costly.
No need of special machines
Less calculations
Freedom of interchangeability
Geared v/s gearless transmission
Geared Gearless
Cause of failure-Pitting, corrosion,
erosion and fatigue have severe effect.
Replacement of entire gear set needs to be done.
Cause of failure- Pitting, corrosion,
erosion and fatigue effect less severely
Replacement of defected pin only
Geared v/s gearless transmission
Geared Gearless
Lubrication and cooling-
Complex systemCooling is a big
issue
Lubrication and cooling
SimpleEasy to cool
Geared v/s gearless transmission
Geared Gearless
Torque transmitting capacity
Used in high torque applications
Different speed at any angle is not easily possible
Torque transmitting capacity
Low torque applications
Different speed at any angle is easily done
Geared v/s gearless transmission
Materials S.No Part name Material Quantity
1 Cylinders MS 2
2 Bearings CI 4
3 Shaft MS 2
4 Bent links MS 3
5 Pulley CI 1
6 Frame MS 1
• Preliminary shaping of machine components
Primary shaping
• Final shape of machine component on lathe
Machining process
• Polishing, lapping, filingSurface finishing
• Arc weldingJoining
• Lubrication, adjustmentSpecial Operations
Manufacturing of parts
ADVANTAGES
Complete freedom of Interchangeability.More efficient than gear.Power could be transferred to any desired
angle.Ease of manufacturing.Misalignment of shafts can be tolerated to
some extent.Simpler cooling systemLow cost of manufacturing.Portability of parts.
LIMITATIONS
Does not work at very low starting torque.Improper hole drilling could pose much problem.Sudden load would cause mechanism breakdown.Links are to be replaced after certain cycle time.Speed ratio is always constant 1:1.
Future Aspects
Torque bearing capacity can be improved.
Flexible bent links can be used.
Has a bright future in automation and
robotics.
Can be used in automobile industry in near
future.
• The model works correctly as per the design
• With the help of this system, we can efficiently reduce the cost in power transmission and
• Further advancement in this technology can be made.
Conclusion
THANK YOU.