DOCSLIB.ORG

Design and Analysis of Differential Gear Box in Automobiles

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Design and Analysis of Differential Gear Box in Automobiles International Journal of Mechanical Engineering and Technology (IJMET) Volume 8, Issue 5, May 2017, pp. 175–185 Article ID: IJMET_08_05_019 Available online at http:// http://iaeme.com/Home/issue/IJMET?Volume=8&Issue=5 ISSN Print: 0976-6340 and ISSN Online: 0976-6359 © IAEME Publication Scopus Indexed DESIGN AND ANALYSIS OF DIFFERENTIAL GEAR BOX IN AUTOMOBILES N. Siva Teja Asst. Professor, Dept. of Mechanical Engineering, K L University, Vaddeswaram, Andhra Pradesh K. Dinesh Babu, M. Siva Nagendra, Ch. Phanideep, J. Sai Trinadh Dept. of Mechanical Engineering, K L University, Vaddeswaram, Andhra Pradesh, ABSTRACT The main objective of this paper is to perform mechanical design of differential gear box and analysis of gears in gear box. We have taken grey cast iron and aluminium alloy materials for conducting the analysis. Presently used materials for gears and gears shafts is Cast Iron, Cast Steel. So, in this paper we are checking as the aluminum can be the other material for the differential gear box for light utility vehicles so, we can reduce the weight. Key words: Differential Gear Box, Structural Analysis, Design and Structural Analysis of Differential Gear Box Cite this Article: N. Siva Teja, K. Dinesh Babu, M. Siva Nagendra, Ch. Phanideep, J. Sai Trinadh, Design and Analysis of Differential Gear Box In Automobiles, International Journal of Mechanical Engineering and Technology, 8(5), 2017, pp. 175-185. http:// http://iaeme.com/Home/issue/IJMET?Volume=8&Issue=5 1. INTRODUCTION A differential is a gear train with three shafts that has the property that the angular velocity of one shaft is the average of the angular velocities of the others, or a fixed multiple of that average. A gear box provides speed and torque conversions from a rotating power source to another device using gear ratios. In automobiles and other wheeled vehicles, the differential allows the outer drive wheel to rotate faster than the inner drive wheel during a turn. This is necessary when the vehicle turns, making the wheel that is traveling around the outside of the turning curve roll farther and faster than the other. The average of the rotational speed of the two driving wheels equals the input rotational speed of the drive shaft. An increase in the speed of one wheel is balanced by a decrease http://iaeme.com/Home/journal/IJMET 175 [email protected] Design and Analysis of Differential Gear Box In Automobiles in the speed of the other. When used in this way, a differential couples the input shaft (or prop shaft) to the pinion, which in turn runs on the ring gear of the differential. This also works as reduction gearing. On rear wheel drive vehicles, the differential may connect to half-shafts inside an axle housing, or drive shafts that connect to the rear driving wheels. Front wheel drive vehicles tend to have the pinion on the end of the main-shaft of the gearbox and the differential is enclosed in the same housing as the gearbox. There are individual drive-shafts to each wheel. 2. OBJECTIVES OF PRESENT WORK We are creating the frictional contact between two mating gears. And we are doing the structural analysis on gear box by providing the torque to the sun gear in the differential gear box. 3. MODELING AND ANALYSIS 3.1. Modeling details To determine the structural analysis on the differential gear box. First, we have to create a model of differential gear box in modeling software’s. We have the assembly of differential gear box in SOLIDWORKS. 3.2. Build Geometry Construct a three-dimensional representation of the bevel gears in SOLIDWORKS. The assembly consists of 2 side gears, 2 ring gears and on sun gear. After doing the assembly in solidworks. Save the file in. IGES format continuing the further work in ANSYS Mechanical. Figure 3.1.1 FinalAssembly of differential gear box http://iaeme.com/Home/journal/IJMET 176 [email protected] N. Siva Teja, K. Dinesh Babu, M. Siva Nagendra, Ch. Phanideep, J. Sai Trinadh 4. DESIGN OF DIFFERENTIAL GEAR BOX Figure 4.1.1 This figure represents the modeling of first side gear in solidworks. It is creaeted by drawing the bevel gear profile from prerequisites and removing the faces of bevel gear tooth for 45 deg mating of other gears for assembly.and adding an extruded stub axles rods to it. Figure 4.1.2 It is the second bevel side gear.This figure represents the modeling of second side gear in solidworks. It is creaeted by drawing the bevel gear profile from prerequisites and removing the faces of bevel gear tooth for 45 deg mating of other gears for assembly.and adding an extrude stub axles to it. Figure 4.1.3 This figure represents the modeling of ring gear in solidworks. It is creaeted by drawing the bevel gear profile from prerequisites and removing the faces of bevel gear tooth for 45 deg mating of other gears for assembly.and adding an xtrude stub axles to it. The ring rotates while the vehicle is taking a turn. It rotates in it’s own axis. http://iaeme.com/Home/journal/IJMET 177 [email protected] Design and Analysis of Differential Gear Box In Automobiles Figure 4.1.4 This figure represents the modeling of sun gear in solidworks. It is creaeted by drawing the bevel gear profile from prerequisites and removing the faces of bevel gear tooth for 45 deg mating of other gears for assembly.and adding an extruded sun gear plates for the fixing of two side and two ring gears.The sun gears carry the torque that is coming from the engine . 5. ANALYSIS OF DIFFERENTIAL GEAR BOX 5.1. Engineering Data We have used two different materials like grey cast iron and aluminium alloy for the analysis of this product. Table:5.1.1 It Shows The Material Properties of grey cast iron. Density 7200 kg m^-3 Coefficient of Thermal Expansion 1.1e-005 C^-1 Specific Heat 447 J kg^-1 C^-1 Thermal Conductivity 52 W m^-1 C^-1 Resistivity 9.6e-008-ohm m Young's Modulus Pa 1.1e+011 Poisson's Ratio 0.28 Tensile Ultimate Strength 2.4e+008 Compressive Ultimate Strength 8.2e+008 Table 5.1.2: It Shows The Material Properties of Aluminium Alloy. Density 2770 kg m^-3 Coefficient of Thermal Expansion 2.3e-005 C^-1 Specific Heat 875 J kg^-1 C^-1 Young's Modulus Pa 7.1e+010 Poisson's Ratio 0.33 Resistivity 3.63e-008-ohm m Thermal Conductivity 114 W m^-1 C^-1 Tensile Yield Strength 2.8e+008 Tensile Ultimate Strength 3.1e+008 http://iaeme.com/Home/journal/IJMET 178 [email protected] N. Siva Teja, K. Dinesh Babu, M. Siva Nagendra, Ch. Phanideep, J. Sai Trinadh 5.2. Frictional Contacts Figure 5.2.1 It shows the frictional coefficient between the mating gears as 0.2. for the frictional or rubbing contact between to test for the thermal conditions. 5.3. Meshing of Differential Gear Box Figure 5.3.1 In this figure, I am representing the fine meshing on the grey cast iron of element size of 0.6 and fine meshing of span angle center. By, meshing we can do the analysis properly and perfectly to know the load values on the differential gear box. Figure 5.3.2 In this figure, I am representing the fine meshing on the Aluminium Alloy of element size of 0.6 and fine meshing of span angle center. By, meshing we can do the analysis properly and perfectly to know the load values on the differential gear box. http://iaeme.com/Home/journal/IJMET 179 [email protected] Design and Analysis of Differential Gear Box In Automobiles 5.4. Torque acting on the Differential Gear Box Figure 5.4.1 This figure shows the combined image of all torques applied on the differential gear box the torques applied are 190, 235, 320 (N-m). 5.5. Fixed Support for Differential Gear Box Figure 5.5.1: In this figure, we are representing the fixed supports because while doing the structural analysis we can’t do it without giving the fixed supports so we have the fixed supports to the sun gear hands because it doesn’t imply any forces on the analysis of the paper. http://iaeme.com/Home/journal/IJMET 180 [email protected] N. Siva Teja, K. Dinesh Babu, M. Siva Nagendra, Ch. Phanideep, J. Sai Trinadh 6. EXPERIMENTAL RESULTS Total Deformation of Grey Cast Iron Figure 6.1 It shows the Total Deformation stress values of the differential gear box at different torques at 190, 235, 320 (N-m) on Grey Cast Iron Von-Mises Stress of Differential Gear Box: Figure 6.2 It shows the Von-Mises stress values of the differential gear box at different torques at 190, 235, 320 (N-m) on Grey Cast Iron. http://iaeme.com/Home/journal/IJMET 181 [email protected] Design and Analysis of Differential Gear Box In Automobiles Total Deformation of Aluminium Alloy Figure 6.3 It shows the Total Deformation stress values of the differential gear box at different torques at 190, 235, 320 (N-m) on Aluminium Alloy. Von-Mises Stress of Differential Gear Box Figure 6.4 It shows the Von-Mises stress values of the differential gear box at different torques at 190, 235, 320 (N-m) on Aluminium Alloy. http://iaeme.com/Home/journal/IJMET 182 [email protected] N. Siva Teja, K. Dinesh Babu, M. Siva Nagendra, Ch. Phanideep, J. Sai Trinadh 7.
Load more

Recommended publications
  • Design of Continuously Variable Bicycle Transmission
    Innovative Bicycle Drivetrain Design of continuously variable bicycle transmission Author: Jean Kolb Supervisor: Dr Eng. Slawomir Kedziora Chain drive with derailleur change mechanism . 98.5% efficiency . Relatively low weight . The most common drivetrain . Not innovative NuVinci CVT hub . Continuously variable ratio . Torque transmitted by traction . Ball planets change the contact angle Source: https://www.fallbrooktech.com/nuvinci-technology CVT hub by Hiroyuki Urabe . Used as reference for own design . Upstream planetary gear train and roller train . Estimated efficiency of 90% . Patented, but not developed CVT hub by Hiroyuki Urabe Pros Cons . Different and innovative . Relatively heavy weight . Continuously variable . Lower transmission efficiency . Enhanced e-bike engine . More complex than the efficiency comparable design from . Protected in hub enclosure “NuVinci” . Clean look Presentation and explanation of the developed design CVT hub Developed CVT hub Autodesk Fusion 360 unites every development step Cloud computing Developed CVT hub Developed CVT hub Upstream planetary gear train Input Output Sprocket Input Input torque on ring gear Fixed carrier Developed CVT hub Planetary roller train Output Input Input torque on sun roller Non-rotatable but on axle displaceable carrier Preloaded spring Preloaded spring to guarantee enough traction Wave spring Preloaded spring Spline Radial bearing on slidable sleeve Needle bearings Axial bearing gets pushed Left handed thread Gap between roller and sun Left handed thread Changing
    [Show full text]
  • Playing with Gears
    174_LEGO_02 10/25/01 3:11 PM Page 17 Chapter 2 Playing with Gears Solutions in this chapter: I Counting Teeth I Gearing Up and Down I Riding That Train: The Geartrain I Worming Your Way: The Worm Gear I Limiting Strength with the Clutch Gear I Placing and Fitting Gears I Using Pulleys, Belts, and Chains I Making a Difference: The Differential 17 174_LEGO_02 10/25/01 3:11 PM Page 18 18 Chapter 2 • Playing with Gears Introduction You might find yourself asking: Do I really need gears? Well, the answer is yes, you do. Gears are so important for machines that they are almost their symbol: Just the sight of a gear makes you think machinery. In this chapter, you will enter the amazing world of gears and discover the powerful qualities they offer, trans- forming one force into another almost magically.We’ll guide you through some new concepts—velocity, force, torque, friction—as well as some simple math to lay the foundations that will give you the most from the machinery.The concepts are not as complex as you might think. For instance, the chapter will help you see the parallels between gears and simple levers. We invite you once again to experiment with the real things. Prepare some gears, beams, and axles to replicate the simple setups of this chapter. No descrip- tion or explanation can replace what you learn through hands-on experience. Counting Teeth A single gear wheel alone is not very useful—in fact, it is not useful at all, unless you have in mind a different usage from what it was conceived for! So, for a mean- ingful discussion, we need at least two gears.
    [Show full text]
  • Design and Development of Open Differential for Transmission System of Quad Bike
    International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 05 Issue: 12 | Dec 2018 www.irjet.net p-ISSN: 2395-0072 Design and Development of Open Differential for Transmission System of Quad Bike Utkarsha Chaudhari1, Prathamesh Sangelkar2, Prajval Vaskar3 1,2,3Department of Mechanical Engineering, Sinhgad Academy of Engineering, Kondhwa ---------------------------------------------------------------------***---------------------------------------------------------------------- Abstract – A differential is an important torque 2. ANALYTICAL CALCULATIONS transmitting device in most of the rear wheel drive vehicles. An ATV is a vehicle which is used to ride in off-road terrains; 2.1 Primary Calculations for Gear Reduction hence continuous application of traction is a vital factor which showcases its performative aspect. The paper describes Input Data: designing and manufacturing an open differential for an off road ATV (Quad Bike) so that the vehicle maneuvers sharp Turning radius of vehicle: - 3m corners without losing traction to the driving wheels. Rear Track width: - 40” Rear tire diameter: - 23” Key Words: Open differential, traction difference, ANSYS, CREO, gear, pinion, centre pin. 1. INTRODUCTION A differential is a gear train with three shafts that has the property that the rotational speed of one shaft is the average of the speeds of the others, or a fixed multiple of that average. In automobiles, the differential allows the outer drive wheel to rotate faster than the inner drive wheel during a turn. This is necessary when the vehicle turns, making the wheel that is travelling around the outside of the turning curve roll farther and faster than the other. The average of the rotational speed of the two driving wheels equals the input rotational speed of the drive shaft.
    [Show full text]
  • Parametric Instability Investigation and Stability Based Design for Transmission Systems Containing Face-Gear Drives
    University of Tennessee, Knoxville TRACE: Tennessee Research and Creative Exchange Doctoral Dissertations Graduate School 8-2012 Parametric Instability Investigation and Stability Based Design for Transmission Systems Containing Face-gear Drives Meng Peng [email protected] Follow this and additional works at: https://trace.tennessee.edu/utk_graddiss Part of the Acoustics, Dynamics, and Controls Commons, and the Propulsion and Power Commons Recommended Citation Peng, Meng, "Parametric Instability Investigation and Stability Based Design for Transmission Systems Containing Face-gear Drives. " PhD diss., University of Tennessee, 2012. https://trace.tennessee.edu/utk_graddiss/1434 This Dissertation is brought to you for free and open access by the Graduate School at TRACE: Tennessee Research and Creative Exchange. It has been accepted for inclusion in Doctoral Dissertations by an authorized administrator of TRACE: Tennessee Research and Creative Exchange. For more information, please contact [email protected]. To the Graduate Council: I am submitting herewith a dissertation written by Meng Peng entitled "Parametric Instability Investigation and Stability Based Design for Transmission Systems Containing Face-gear Drives." I have examined the final electronic copy of this dissertation for form and content and recommend that it be accepted in partial fulfillment of the equirr ements for the degree of Doctor of Philosophy, with a major in Mechanical Engineering. Hans A. DeSmidt, Major Professor We have read this dissertation and recommend its acceptance: J. A. M. Boulet, Seddik M. Djouadi, Xiaopeng Zhao Accepted for the Council: Carolyn R. Hodges Vice Provost and Dean of the Graduate School (Original signatures are on file with official studentecor r ds.) Parametric Instability Investigation and Stability Based Design for Transmission Systems Containing Face-gear Drives A Dissertation Presented for the Doctor of Philosophy Degree The University of Tennessee, Knoxville Meng Peng August 2012 ACKNOWLEDGEMENTS I would like to express my deepest gratitude to my primary advisor, Dr.
    [Show full text]
  • Evaluation on Failure Analysis of an Automobile Differential Pinion Assembly (IJIRST/ Volume 1 / Issue 12 / 054)
    IJIRST –International Journal for Innovative Research in Science & Technology| Volume 1 | Issue 12 | May 2015 ISSN (online): 2349-6010 Evaluation on Failure Analysis of an Automobile Differential Pinion Assembly Ronak P Panchal Pratik B. Umrigar M.E. Student Department of Automobile Engineering Department of I.C. Engine & Automobile GTU, Mahesana, India GTU, Mahesana, India Abstract Bevel gears have become a subject to research interest because the dynamicload, attention of the noise level during operation and demand for lighter and smaller. In such type of gears there is a problems of failures contact at meshing the teeths. This can be avoided or minimized by proper method analysis and modification of the different gear parameters. This thesis presents characteristics of a bevel gear in dynamic condition involving meshing stiffness and other stresses produce. The purpose of this thesis is by using numerical approach to develop theoretical model of bevel gear and to determine the effect of meshing gear tooth stresses by taking material case hardened alloy steel (15Ni4Cr1) . To estimate the meshing stiffness, three-dimensional solid models for different number of teeth are generated by Solid works and the numerical solution is done in Ansys which is a finite element analysis. Keywords: Design of Spiral Bevel Gear, Analysis of Spiral Bevel Gear _______________________________________________________________________________________________________ I. INTRODUCTION Gear is a mechanical device used in transmission systems that allows rotational force to be transferred to another gears . The gear teeth allow force to be fully transmitted without slip and depending on the configuration can transmit forces at different speeds, torques, and even in a different directions.
    [Show full text]
  • Basic Gear Systems
    Basic Gear Systems A number of gears connected together is called a “Gear Train”. The gear train is another mechanism for transmitting rotary motion and torque. Unlike a belt and pulley, or chain and sprocket, no linking device (belt or chain) is required. Gears have teeth which interlock (or mesh) directly with one another. Advantages The main advantages of gear train transmission systems are that because the teeth on any gear intermesh with the next gear in the train, the gears can't slip. (An exact ratio is maintained.) Large forces can be transmitted. The number of turns a gear makes can be easily controlled. High ratios between the input and the output are easily possible. Disadvantages The main disadvantage of a gear system is it usually needs a lubrication system to reduce wear to the teeth. Oil or grease is used to reduce friction and heat caused by the teeth rubbing together. Gear systems to increase and decrease rotational velocity Gears are used to increase or decrease the speed or power of rotary motion. The measure of how much the speed or power is changed by a gear train is called the gear ratio (velocity ratio). This is equal to the number of teeth on the driver gear divided by the number of teeth on the driven gear. To decrease the speed of the output the driver gear is smaller than the driven gear. (This will reduce the speed but increase the “torque”.) This diagram shows a small gear (A) driving a larger gear (B). Because there are more teeth on the driven gear there is a reduction in output speed.
    [Show full text]
  • Design and Fabrication of Shaft Drive for Two Wheelers
    International OPEN ACCESS Journal Of Modern Engineering Research (IJMER) Design and Fabrication of Shaft Drive for two Wheelers K.Vinoth Kumar1, Kari Naga Nikhil2, Kakollu Manoj Kumar3, Kaza Sai Sravan4, K.Subha Theja5 1,2,3,4,5Student, Department Of Mechanical Engineering R.M.K College Of Engineering & Technology, Thiruvallur , India 1. Abstract 1.1 Role Of Automobile In Our Day To Day Life In modern world the living status were developed and developing more equipped. The automobile takes a great part in the development, since it plays a major key in daily life while automobile is concern two wheeler i.e.(motor cycles and bike) it plays very important role because it saves the time of traveller by reaching the target place very faster. Although it saves the time, it makes lots of noise by the chain drive and also makes greasy over the parts of the bike by the chain drive lubrication. It leads to lot of maintenance cost. So by keeping maintenance as the main concept in our mind we had planned to do this project. 1.2 Proposed Method A shaft-driven two wheeler is a two wheeler that uses a drive shaft instead of a chain to transmit power from the pedals to the wheel arrangement. Shaft drives were introduced over a century ago, but were mostly supplanted by chain-driven two wheelers due to the gear ranges possible with sprockets and derailleur. Recently, due to advancements in internal gear technology, a small number of modern shaft-driven two wheelers have been introduced. Shaft-driven bikes have a large bevel gear where a conventional bike would have its chain ring.
    [Show full text]
  • Gear Nomenclature
    Nomenclature Gear Gear Nomenclature Racks Bevel Gears Spur Gears B Bevel Gear, Cast Iron S Steel B Pinion, Steel TS Steel, 20° BS Bevel Gear, Steel C Cast Iron BS Pinion, Steel TC Cast Iron, 20° H Hardened Teeth Notes: NM Non-Metallic B steel pinions may run with BS gear of same ratio. R Steel ANY RATIO OTHER THAN 1:1. RA Steel, Heavy Backing Examples: Pinion and driven gear have S620 Steel 6DP 20T 14½°PA TR Steel, 20°, Heavy Backing different number of teeth. R20 Steel, 20°, Wide Face TS620 Steel 6DP 20T 20°PA C660 Cast 6DP 60T 14½°PA Examples: Examples: S620H Steel 6DP 20T Hardened 14½°PA R6X2 14½° STD Backing 6DPX2' Long B1040-2 Cast 10DP 40T 2:1 Ratio NM620 Non-Metallic 6DP 20T 14½°PA RA6X4 14½° Heavy Backing 6DPX4' Long B1020-2 Steel 10DP 20T 2:1 Ratio S612BS1 Steel 6P 12T 1" Bore KW SS TR6X6 20° STD Width 6DPX6' Long BS1040-2 Steel 10DP 40T 2:1 Ratio TS816BS7/8 Steel 8DP 16T 20°PA .875 Bore KW SS R206X6 20° Wide Face 6DPX6' Long BS1020-2 Steel 10DP 20T 2:1 Ratio BS1020-2 Steel 10DP 20T 2:1 Ratio Miter Gears Worm Worm Gear M Miter — Steel Gears W Steel W Worm, Steel A or B Larger Bore (Suffix) WH Steel With Hub WH Worm, Steel w/Hub HM Miter-Hardened Teeth Projection Projection K KW & SS WG Steel Hardened WG Worm, Steel Hardened Ground Threads Ground Threads Notes: WHG Steel Hardened Ground Threads WHG Worm, Steel Hardened ALWAYS 1: 1 RATIO.
    [Show full text]
  • High Efficiency Moped a MQP Proposal Submitted to the Faculty Of
    High Efficiency Moped A MQP Proposal Submitted to the Faculty of the WORCESTER POLYTECHNIC INSTITUTE in partial fulfillment of the requirements for the Degree of Bachelor of Science in Mechanical Engineering by ___________________________________ Tim Ellsworth Date: 10/11/2012 Approved: Prof. Kenneth Stafford, Major Advisor Prof. Cosme Furlong-Vazquez Table of Contents List of Tables ................................................................................................................................................. 4 List of Figures ................................................................................................................................................ 5 Abstract ......................................................................................................................................................... 7 Executive Summary ....................................................................................................................................... 9 Introduction ................................................................................................................................................ 12 Objective ................................................................................................................................................. 12 History ..................................................................................................................................................... 13 Component Selection .................................................................................................................................
    [Show full text]
  • Analysis of Differential Crown Gear and Pinion for Axle with Different Materials
    ISSN: 2455-2631 © April 2019 IJSDR | Volume 4, Issue 4 Analysis of differential crown gear and pinion for axle with different materials 1Dr. Satypal T. Warghat, 2Dhiraj V. Astonkar, 3Manish P. Bijwe 1Head of Department, 2,3Assistant Professor Department of Mechanical Engineering, Dr. Sau. KamaltaiGawai Institute of Engineering and Technology, Darapur, Tq. Daryapur, Dist. Amravati, Maharashtra 444814 Abstract: The differential can be stated as a gear train used to control the speed and torque to the rear wheels. While taking a turn, the basic requirement of the vehicle is to control the speed of rear wheels so that the vehicle turns smoothly on road surface. The differential mainly consists of three shafts and gear train arrangement. The first shaft is propeller shaft which provides the necessity torque and speed to differential for turn. The other two shafts are axle shafts mounted for each rear wheels. These shafts are attached to propeller shaft by crown gear and pinion arrangement thus making a bevel pair of gears. The two main parts of differential transmission system, one is crown gear which gives allowable speed to turn the vehicle and another is pinion which provides allowable speed and torque for turning the vehicle. Thus, the analysis of such crown gear and pinion makes necessity for strength. The analysis is conducted to verify the best material for the gears in the gear box at high speeds by analyzing von miss stress, deformation and also by considering safety of transmission. The various materials selected for analysis are Grey Cast Iron, Structural Steel, Titanium Alloy and Polyethylene.
    [Show full text]
  • Study of Differential Bevel Gear Through Machining Method
    International Journal of Engineering and Technical Research (IJETR) ISSN: 2321-0869, Volume-1, Issue-3, May 2013 STUDY OF DIFFERENTIAL BEVEL GEAR THROUGH MACHINING METHOD Mohd Abbas, Sanjeev Sharma, Vinit Kumar Sharma Straight Path. Abstract— In this paper we have selected the machining method, a cost saving manufacturing process to produce If the left side gear (red) encounters resistance, the planet straight bevel gears without any compromise with quality gear (Green) rotates about the left side gear, in turn applying parameters, then validate the samples taken from vendor as extra rotation to the right side gear (yellow). per our design requirement and to increase Durability & Productivity of Straight Bevel Gears. To validated we have used tractor as a testing equipment and validate the gears to our design specification. Index Terms— Straight Bevel Gear, Spiral Bevel Gear Circular Pitch, Pressure Angle, Pitch Diameter, Tooth Parts. I. INTRODUCTION Power is supplied from the engine, via the gearbox, to a driveshaft, which runs to the drive axle. A pinion gear at the end of the propeller shaft is encased within the differential Figure 2: Differential Dynamics When Vehicle Takes Turn. itself, and it engages with the large crown-wheel. The crown-wheel is attached to a carrier, which holds a set of A general Gear manufacturing process contains the three-four small planetary straight bevel gears. The three following process- planetary gears are set up in such a way that the two outer gears (the side gears) can rotate in opposite directions relative to each other. The pair of side gears drive the axle shafts to each of the wheels.
    [Show full text]
  • General Applications of Gears
    UNIT - III GEAR MANUFACTURING PROCESS SPRX1008 – PRODUCTION TECHNOLOGY - II Gears are widely used in various mechanisms and devices to transmit power and motion positively (without slip) between parallel, intersecting (axis) and non-intersecting non parallel shafts, •without change in the direction of rotation •with change in the direction of rotation •without change of speed (of rotation) •with change in speed at any desired ratio Often some gearing system (rack – and – pinion) is also used to transform Rotary motion into linear motion and vice-versa. Fig.1 Features of Spur Gear Gears are basically wheels having, on its periphery, equispaced teeth which are so designed that those wheels transmit, without slip, rotary motion smoothly and uniformly with minimum friction and wear at the mating tooth – profiles. To achieve those favorable conditions, most of the gears have their tooth form based on in volute curve, which can simply be defined as Locus of a point on a straight line which is rolled on the periphery of a circle or Locus of the end point of a stretched string while its unwinding over a cylinder as indicated in Fig. General Applications of Gears Gears of various type, size and material are widely used in several machines and systems requiring positive and stepped drive. The major applications are: • Speed gear box, feed gear box and some other kinematic units of machine tools • Speed drives in textile, jute and similar machineries • Gear boxes of automobiles • Speed and / or feed drives of several metal forming machines • Machineries for mining, tea processing etc. • Large and heavy duty gear boxes used in cement industries, sugar industries, cranes, conveyors etc.
    [Show full text]