International Research Journal of Engineering and Technology (IRJET) e-ISSN:2395-0056
Volume:13Issue:03|Mar2026 www.irjet.net p-ISSN:2395-0072
GEARLESS TRANSMISSION SYSTEM USING ELBOW MECHANISM
Shreyash Jagtap1 , Sai Salunkhe2 , Shubham Gurav3 , Adinath Khumbhar4 , Sameer Yewale5
1-4
Student[Department of Mechanical Engineering KBP Polytechnic Satar, Maharashtra, India
5Professor, Dept. of Mechanical Engineering, Kbp Polytechnic Satara, Maharashtra, India
Abstract - The gearless transmission system, which utilizes an "elbow" mechanism, is intended to provide a system for the transmission of rotary motion without gears. In a gearless transmission system, a number of "elbow" mechanisms are connected to a turning disc and a number of output shafts, where the "elbow" mechanisms are connectedtoeachotherto form a circular path when the input shaft rotates, causing the output shaft to turn simultaneously.
The gearless transmission system utilizing an "elbow" mechanism is simple in design, easy to manufacture, and requires minimal maintenance compared to other gear systems. This system is ideal for use in a number ofmechanical and industrial applications due to the low costs and high efficiency of the system in the transmission of motion to a number of shafts for simultaneous rotation.
Key Words: 1.Gearless transmission, 2.Elbow mechanism, 3.Powertransmission,4.Mechanical linkage,5.Rotary motion, 6.Machine design,7. Automationsystems.
1. INTRODUCTION
Oneofthemostimportantfunctionsofamechanicalsystem is the transmission of power, which is responsible for the transmission of motion from one point to another in the system. Generally, mechanical systems use gears for the transmissionofmotionfromoneshafttoanother.Gearsare effective for the transmission of power from one point to anotherinamechanicalsystem.However,therearemany disadvantagesofusinggearsforthetransmissionofpower from one point to another in a mechanical system. The disadvantages of gear transmission include complexity, higher cost, and the production of noise during the transmission of motion from one point to another in a mechanicalsystem.
To overcome the disadvantages of gear transmission in a mechanicalsystem,agearlesspowertransmissionsystem with an elbow mechanism is developed. In the gearless powertransmissionsystemwithanelbowmechanism,there isnoneedfortheuseofgearsforthetransmissionofmotion fromonepointtoanotherinthesystem.Thetransmissionof motionfromonepointtoanotherinthegearlesspower
transmissionsystemwithanelbowmechanismisdonewith thehelpofanelbowmechanismthatissimpleandconsists ofL-shaperodsthatrotatewiththehelpofarotatingdisc.
2. LITERATURE SURVEY
The gearless transmission systems use a system of transferringrotarymotionwithoutgears;forexample,using an elbow-shaped linkage system that rotates a disc and multiple output shafts for simultaneous rotation [2]. The elbowlinkagesystemissimpleandeasytomanufacture;the inputshaftrotatestheelbowrodinacircularmotionforthe outputshaftstorotatesimultaneouslywithoutgearmeshing [5].Theadvantagesofthegearlesstransmissionsystemare thatitischeaptomakeandmaintain[4];thesystemcanbe used for synchronized shaft rotation in various manufacturingprocessesandconveyors[2].Thesystemis adaptableforuseinvariousloads[5];however,thesystem haslimitationswhencomparedtoagearsystemintermsof torqueandspeed[1]
3. METHODOLOGY
Theprojectwascompletedinastep-by-stepfashion.Firstly, the drawing of the project, which included the top view, front view, and side view, was studied. This was to comprehend the arrangement of all the parts, such as the shafts,motor,bearings,andelbowrods.
Then,materialswereselectedfortheproject.Forexample, mildsteelwasusedfortheshafts,metalrodswereusedfor theelbowlinks,andsquarepipeswereusedfortheframes. Then, all the parts were fabricated based on the given dimensions.
Afterfabrication,theprojectwasassembled.Thisincluded mountingthemotor,fixingtheshaftsalongwithbearings, andinsertingtheelbowrodsintothehub.Properalignment wasmaintainedtoensuresmoothworkingoftheproject. Then, the project was tested by running the motor. The projectwassuccessfullyabletotransmitmotionfromone shafttoanotherthroughtheuseofanelbowmechanism. Lastly,theprojectwascheckedtoensuresmoothworking, minimum noise, and efficiency. Some adjustments were madetoensuresmoothworking.
4.
International Research Journal of Engineering and Technology (IRJET)
Volume:13Issue:03|Mar2026 www.irjet.net p-ISSN:2395-0072
SYSREM
DESIGNAND COMPENENT DESCRIPTION
TABLE4.1:-ComponentDescription
Sr.No ComponentName Material Used Function
1. InputShaft Steel Transfers input rotationalmotion
2. RotatingDisc Steel Connects elbow rods and rotates with inputshaft
3. ElbowRods Steel Transmits motion to outputshafts
4. OutputShafts Steel Receivesmotionfrom elbowrods
5. Bearings Standard BallBearing Supports smooth rotation
6. FrameStructure Steel Holdsallcomponents together
The gearless transmission system that uses an elbow mechanismhaskeypartsthatworktogethertomakemotion transmissionsmoothandefficient.
Theinputshaftgetsmotionfromthemotorandisthemain partthatdrivesthesystem.Thismotionisthenpassedonto therotatingdisc,whichisattachedtotheshaftandspinswith it.Therotatingdiscislikeabasethatconnectstotheelbow rodsandhelpsturnmotionintomotionthatuseslinks.
TheelbowrodsareL-shapedsteellinks.Dothemainwork,in thesystem.Theysendmotionfromtherotatingdisctothe outputshaftsbyslidingandrotating.Theoutputshaftsget thismotion.Spinaccordinglywhichisthefinaloutput.
Bearings are used to support the shafts so they can spin smoothlyandwithoutfriction.Allthesepartsareattachedto a frame that holds them in place keeps them aligned and providesstabilitywhenthesystemisworking.
Theframeisimportantbecauseitkeepseverythingandin line. The elbow rods, rotating disc and shafts all work togethertomakethesystemrunsmoothly.Thebearingshelp reducefriction,whichmakesthesystemmoreefficient.
Overall the gearless transmission system using an elbow mechanismismadeupofimportantpartsthatworktogether toprovideefficientmotiontransmission.Thesystemrelies onthemovementofitspartstoachievesmoothandefficient operation.
FIG4.1:-2DDrawing
drawingshowsthedesignofagearlesstransmissionsystem usingelbowmechanismwithtop,front,andsideviews.All dimensionsaregiveninmillimetersforproperfabrication. The system includesa motor connected to the input shaft, whichdrivesacircularplate(hub)mountedontheshaft. Elbowrodsareconnectedtotheplate,whichtransmitmotion totheoutputshaftplacedat90°,showinggearlessmotion transfer.Bearingsareusedtosupporttheshaftsandreduce frictionforsmoothoperation.Theentiresystemismounted on a frame structure made of square pipes and plates to maintainalignmentandstability.
Thedrawingalsoprovidesdetailsofindividualparts,helping inaccuratemanufacturingandassemblyofthesystem
FIG4.2:-3DModel
The3Dmodelisagearlesstransmissionsystem.Itusesan elbowmechanismthatismountedonaframe.Thissystem hasa motorthatisconnectedtotheinputshaft.Whenthe electricmotorrunsitmakestheinputshaftrotate.Theinput shaftissupportedbybearingssothatitcanmovesmoothly. Thereisaplate,whichislikeadisc,fixedontheinputshaft. Manyelbowrodsareconnectedbetweentwooftheseplates. Astheinputshaftrotatestheseelbowrodsmoveinacircle.
International Research Journal of Engineering and Technology (IRJET) e-ISSN:2395-0056
Volume:13Issue:03|Mar2026 www.irjet.net
Theytransfermotiontotheoutputshaft.Theoutputshaftis positionedatanangle,whichis90degrees.Thisshowsthat the gearless transmission system can transmit motion withoutusinganygears.
Thewholethingissupportedbyasteelframestructure.This steel frame provides stability. Makes sure all the partsare properlyaligned.Therearebearings,intheplaceswherethey are needed to reduce friction and make sure everything works efficiently. The design of the gearless transmission system is simple and compact. It is a way to show how gearless motion transmission works. The gearless transmissionsystemiseasytounderstand.Itdoesnottake upalotofspace
5. ADVANTAGES AND APPLICATIONS
Advantages
Simpleandcompactdesign
Lowmanufacturingcost
Reducedmaintenancerequirements
Noneedforlubricationlikegearsystems
Abilitytotransmitmotiontomultipleshafts
Applications
Mechanicalautomationsystems
Smallindustrialmachines
Educationaldemonstrationmodels
Powertransmissionmechanisms
Agriculturalmachinery
6. CONCLUSIONS
Agearlessmechanismthattransmitsmotionusingapivoting or elbow-shaped, multi-linked machine is a new twist on howtosendmotionfromonepartofamachinetoanother, using no gears. Traditional gear systems require a lot of partstooperateaswellastimeintheirupkeepbecausethey createfriction,wear,andrequireoilorotherlubricant.Using thismethodovercomesmanyofthoseissuesbycreatinga linkage,providingmore"efficient"powertransferwithless "mechanicalloss"fromthetransmissionofforcethroughthe linkingmechanism.Themechanismusestwoelbow-shaped rods to convert rotation into a combination of linear and rotational motion so that power can be "smoothly" and continuouslytransferredfromoneshafttoanother,evenat angles up to 90°, without creating vibration or noise. A gearless transmission mechanism provides a reliable machinethatrequiresfarlessmaintenancethanagearstyle. This gearless transmission mechanism has a simplified manufacturingandassemblyprocesscomparedtogear-style machines,thusmakingitcost-effective.Itisidealforusein light-medium duty machinery and automation and educational models with smooth, continuous power transmission
REFERENCES
p-ISSN:2395-0072
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[2]Gaikwad, J. (2017). Gearless Transmission Mechanism anditsApplications.
[3]S.S.Rattan,TheoryofMachines,McGrawHillEducation, India,2017.
[4]N.Patil,J.Gaikwad,M.Patil,andC.Sonawane,“Gearless TransmissionMechanismanditsApplications,”International JournalofInnovativeResearchinScience,Engineeringand Technology,vol.6,no.3,2017.
[5]Khan,A.S.,&Pandey,K.(2021).Designandfabricationof gearlesstransmissionusingelbowMechanism.International ResearchJournalofEngineeringandTechnology