Design and analysis of differential gearbox full report download abstract abstract my project design and analysis of differential gearbox mainly focuses on the mechanical design and analysis of gearbox as transmit the power. The function of the differential is to permit the relative movement between inner and outer wheels when vehicle negotiates takes. Design and fabrication of gear box full report download. Finite element analysis of spiral bevel gears pair used in. The differential can be stated as a gear train used to control the speed and torque to the rear wheels. A gearbox, also known as a gear case or gear head, is a gear or a hydraulic system responsible for transmitting mechanical power from a prime mover an engine or electric motor into some form of useful output. They are usually mounted on shafts that are 90 degrees apart, but can be designed to work at other angles as well. I simplified it greatly as there may be more than 2. The ring gear is attached to the differential case. By using epicyclic gear, different torque speed ratio can be obtained. How a differential works and types of differentials. One or more sun gears can be used for achieving different output.
The differential is found on all modern cars and trucks, and also in many allwheeldrive fullti. Introduction differential is an essential part of any four wheeled vehicle. The master rebuild kit comes complete with everything youll need to rebuild the center section of your differential. Differential gears of automotive transmission are being commercially produced with neat tooth forms.
Spur gear differential this is another type of differential that was used in some early automobiles, more recently the oldsmobile toronado, a spur gear differential has two equalsized spur gears, one foreach halfshaft, with a space between them. Feb 09, 2009 how differential gear works best tutorial. When comparing the stress values of the three materials for all speeds 2000rpm, 4500rpm and 6000 rpm, the values are less for aluminum alloy than alloy steel and cast iron. The gearbox is a kind of right angle gear and is suitable for a right angle solution with a low ratio. The main question is how to come up with such an arrangement of gears. Best practices for gearbox assembly and disassembly. Differential gear, in automotive mechanics, gear arrangement that permits power from the engine to be transmitted to a pair of driving wheels, dividing the force equally between them but permitting them to follow paths of different lengths, as when turning a corner or traversing an uneven road. This is the reason for a device known as a limited slip differential or traction control. The final pages cover the various types of differential that can be used, the choice of bearings and oil seals and finally the type of lubrication system required to suit the application. The main aim of this paper is to focus on the mechanical design and analysis on assembly of gears in gear box when they transmit power at different speeds i. For the sake of simplicity, it makes sense to first understand the individual steps behind the idea of the differential gear. These kits include the following, as needed per application.
Differential gearbox seminar reportpdf ppt download abstract. Gearboxes are used in almost every industry right from power to marine, and also include agriculture, textile, automobiles, aerospace, shipping etc. Proper maintenance is a must to protect you and the gear set. The teeth on bevel gears can be straight, spiral or hypoid. Research article design and structural analysis of. Each time the shaft spins one revolution, the gear moves one tooth forward. Construction and working of a differential in automobile. It consists of two bevel gears sun gear and two bevel gears planet gear. We sell them, we build them, we eat, sleep and dream about them we love differentials. The design and operating principle of a differential gear are not easy to understand at first glance. Transfer power from the drive shaft to the ring gear. Sai trinadh, design and analysis of differential gear box in automobiles, international. The rotation of the crown wheel gear is always the average of the rotations of the side sun gears. Typically, each gear mesh will have 1%2% loss in efficiency, so with three different meshes from the transmission shaft to each of the half shafts, the system will.
The engine is connected to the gearbox, the gearbox, via the tail shaft to the differential, and the differential via the axles to the wheels. Transmission box change the engine speed into torque when climbing hills and when the vehicle required. Chapter 11 drive lines, differentials, drive axles, and. So using aluminum alloy is safe for differential gear. Differential gear box, structural analysis, design and structural analysis of differential gear box cite this article. Thus, there is relative movement between inner and outer wheel.
A front wheel drive car basically doesnt have a normal input shaft, but everything else is the same. The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and owned by third party users. Buy products related to differential gearbox products and see what customers say about differential gearbox products on free delivery possible on eligible purchases. To transmit the power to the wheels while allowing them to rotate at different speeds this is the one that earned the differential its name. Design calculations are done on the differential of ashokleyland 2516m by varying materials and speeds. The gear train in an automobile differential is a common application of gears, but often misunderstood by the lay public. The differential is a device that splits the engine torque two ways, allowing each output to spin at a different speed.
The transmission box which is also known as the gear box is the second element of the power train in an automobile. When the vehicle is traveling in a straight line, there will be no differential movement of the planetary system of. As the spider gear is connected with the ring gear, power flows to it. Straight bevel gear teeth actually have the same problem as straight spur gear teeth as each tooth engages, it impacts the. Differentials open, locked, limited slip, edl, quattro the open differential thats more or less the diagram of the inside of differential for a rear wheel drive car. This differential has automotive style cut gears, tapered roller bearings, along with an overall larger gear size. Chapter 11 drive lines, differentials, drive axles, and power train accessories. I had developed this work as my semester project with a view to get familiar with the technologies as well as application. Oct 22, 2017 introduction differential is an essential part of any four wheeled vehicle. By observing the frequency analysis, the vibrations are less for aluminum alloy than other two. Also the spider gear is connected to two more side gears. There is one pinion gear and one ring gear or crown wheel per differential.
The final pages cover the various types of differential that can be used, the choice of bearings and oil seals and finally. Lego technic differential gear box kit gears, pins, axles, connectors 27 pieces. In a differential, since the speed transmitted by the crown gear is shared by both of the wheels not necessarily traveling. In most applications gearbox reliability is critical to the produc. When two gears are in contact and there is no slipping, v w 1 x r 1 w 2 x r 2, where v is the tangential velocity at the point of contact between the gears, and r is the respective pitch radius of the gear. The crown wheel has another unit called the differential unit. Differentials open, locked, limited slip, edl, quattro. There are a total of three bearings on the pinion gear giving it much more support over the standard rear differentials, this is why the kit includes a shorter driveshaft. Why because differentials are what makes a vehicle a 4 wheel drive they have more than one. This unique design affords the ability to take up lost motion in the drive train and to actually preload the mechanism producing. Differential gear box 3d cad model library grabcad. In this article, youll learn why your car needs a differential, how it works and what its shortcomings are.
Differential gear hdi series component type hdi258sk8dk the rotary feed tables are driven by dual pinions which engage the ring gear. Bevel gearboxes are special speed reducers with their shafts lying perpendicular to each other and therefore used mainly in rightangle applications. Here we present a simplified explanation of how and why an automobile differential works. The rpm difference between left and right created by the. In order to help select the oil for differential correctly, the best gear oils are gathered and presented on the list. Differential gear system mini project report transmission. Working of differential gear box for automobile vehicles.
Slip differentials provide more driving force to the wheel. Objective phase 1 to study the differential and working in a vehicle. Always distribute equal amounts of torque to both wheels react to resistance traction to allow the wheel with more resistance traction to rotate less and the wheel with less resistance rotate faster needed in turns where the inside wheel has to rotate less than the outside wheel. Second they multiply the torque by varying the gear ratio thru different combinations of gear teeth. First they are the component that changes the rotational direction of the torque. Mar 31, 2014 the transmission box which is also known as the gear box is the second element of the power train in an automobile. Bevel gears are useful when the direction of a shafts rotation needs to be changed. A gear box transmits the engine power to the driving wheels with the help of different gearing systems. In the differential, bevel pinion gear is fixed to the propeller shaft which rotates the crown wheel. While taking a turn, the basic requirement of the vehicle is to control the speed of rear. Chapter 11 drive lines, differentials, drive axles, and power. Differential is an arrangement of gears which work together and allow the vehicle to take a turn smoothly.
Objectives when you have completed this chapter, you will be able to do the following. Integy rc model hopups c25956green billet machined gear box for traxxas latrax. Differential lubrication hypoid gear types usually use 75w to 90w gear lube limited. In this paper the differential gears assembly and its housing are analyzed for the vibrational effect on a system in which the life of the gears is detrmined within different frequency range in the platform of ansys14. Spurgear differential this is another type of differential that was used in some early automobiles, more recently the oldsmobile toronado, a spurgear differential has two equalsized spur gears, one foreach halfshaft, with a space between them. Identify the components and explain the functions and the maintenance. It is used to change the speed and torque of vehicle according to variety of road and load conditions. Apr, 2014 differential is an arrangement of gears which work together and allow the vehicle to take a turn smoothly.
In this research the differential gears analyzed for vibration effect on whole system to optimize the life of the gears under different frequency in the platform of ansys14. Working of a differential is explained in a logical and illustrative manner in this animated video. Well also look at several types of positraction, also known as limited slip differentials. Transaxle final drive types helical requires the centerline of the pinion gear to be aligned with the centerline of the ring gear planetary allows for a very compact transaxle design. Analysis is also conducted by varying the different composites materials for gears. Jun 11, 2014 working of a differential is explained in a logical and illustrative manner in this animated video. Detailed modeling, assembly and analysis of tooth of crown gear and pinion is performed. 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. Gear lies at the heart of differential and special mention should be made about its rotation.
An excellent tutorial from the 1930s on the principles and development of the differential gear. Because the torque in and out is different, a gear box has to. Nov 23, 2012 spur gear differential this is another type of differential that was used in some early automobiles, more recently the oldsmobile toronado, a spur gear differential has two equalsized spur gears, one foreach halfshaft, with a space between them. Differential rebuild kits west coast differentials. Design and analysis of differential gearbox engineers. Working of differential gear box for automobile vehicles differential when a four wheeler car takes a turn, the outer wheel turns faster than inner wheel. What is epicyclic gearbox main components, working and. Us gear final results properly designed, manufactured, and maintained us gear gears, correctly assembled by you in a clean, rigid gear box, and operated with the proper lubricant, will result in safe and satisfactory performance. Design and fabrication of gear box full report download gearbox.
Differential gear system mini project report free download as word doc. This is why, if the driven roadwheels are lifted clear of the ground with the engine off, and the drive shaft is held say leaving the transmission in gear, preventing the ring gear from turning inside the differential, manually rotating one driven. Different gear combinations are used to give the smooth running, the lower fuel. A gear box transmits the engine power to the driving wheels with the help of different gearing. They all perfectly fit differential, however, each one has its peculiarities, which should be considered. Sun gear i t is the gear with angular cut teethes and is placed in the middle of the epicyclic gearbox. A differential allows wheels of a vehicle to rotate at different speeds.
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