Planetary gear train design software

Built on a strong, innovative set of design tools, the new 3d terrain and landscape. This is sometimes referred to as conepulley backgearing because of its use within the cone. A differential planetary gear model with backlash and. A planetary gear train is very much like our own solar system, and thats how it gets its name. The sun gear is located at the center, and transmits torque to the planet gears that orbit around it. The escape wheel normally turns once a minute and it connects through the train with the shaft holding the minute hand, which turns once an hour, hence the 60. In order to achieve the above objective, methodology of design used is explained in next point. Version 10 offers you unparalleled design capabilities for your railroad layout. In the past ive had luck using this site to create an illustrator file that i can extrude in rhino. The design allows for an unlimited number of stages. As you launch this software, it lets you define the module size in mm, number of planets, segments per flank, number of teeth in internal and planet. Free body diagrams of gear trains american society for.

A practical guide to fdm 3d printing gears engineerdog. Select a large number for the shaft diameter when making a template to get a circle around the gear. This section introduces the dimension calculations for spur gears, helical gears, gear rack, bevel gears, screw gears, and worm gear pairs. Since, i am working in the metric unit every dimension will be in mm. Just be sure to design all your gears using the same tool to ensure that they mesh as intended. Software puts teeth into gear design machine design. The epicyclic gear train family in general has a central sun gear which meshes with and is surrounded by planet gears. Epicyclic gearing or planetary gearing is a gear system consisting of one or more outer, or planet, gears or pinions, revolving about a central sun gear or sun wheel. Selecting gears in metric unit the gear tooth profile of the spur gear will be in module. There are endless combinations of noncircular gears than can be used today as key components in new mechanisms and machines.

Usually, an epicyclical gearing systems are employed to achieve high reduction ratio in a small and power dense package. Gearotic cad software provides statistical data about gears it makes, also comes with a gear train calculator should it be required. Gearify is a great tool to easily investigate the world of noncircular gears. The outermost gear, the ring gear, meshes with each of the planet gears.

Even with feverish cranking, the output shaft barely moves because of the very high gear ratio. In short the planetary gears systems have high torque density, compact, low inertia and can be grease lubricated for life, which are demands of industrial applications. Planet gears are just idle gears from the force perspective, and the fbd is shown in fig. The new softtrak feature lets you design professionalstandard track using splinelike tools the produce track complete with tangents, curves and easements if you choose. It is examined that load sharing capability is not equal in the planetary gear train. Ring gear planetary motion gears you can also generate templates for inside gearing, such as would be used for planetary motion gears. I am in need of planetary gear train design software. O e of the prime and biggest use of a planetary gearbox is for running the armature of a wind turbine.

Best regards, matthew ian loew luck is the residue of design. Fbd of a planetary gear train a planetary gear train is a gear train that allows the input and output shaft to be coaxial. In this case, the planet gears have 12 teeth, the sun gear has 18 and the ring gear has 42 teeth. In order to ensure valid comparison of the different transmis sion concepts, several default parameters must be predefined for the design process of the gears. Normally, the sun gear is driven and thus move the planet gears locked in the planet carrier and form the output shaft. In a planetary train at least one of the gears must revolve around another gear in the gear train. As more and more of these engineers reach retirement age younger engineers must pick up where they left off, and for many epicyclic gearing is an area where they lack experience. Gear ratio, torque and speed calculations smlease design. To model gear pair 2, add a line, to become coincident with the lineofcentres of gear pair 1. And i am looking for a complete packages wher i can design and optimize helical gear spur gear as a system. Design, load analysis and optimization of compound epicyclic. Feb 20, 2015 how to calculate the gear ratio in a planetary gear set where one member is stationary. From a kinematic point of view, what sets this mechanism apart is the kinematic constraint set between gear. Simply enter a negative number of teeth for one of the gears, and that gear will be an inside gear.

This software comes in handy to design planetary gears only. Planetary gear train nathaniel, i agree, it would be nice to be able to generate a complete gear train, but the biggest thing i would like to see is the correct tooth form for the gear part files that are generated. A planetary gear train is a little more complex than other types of gear trains. Ports c, r, and s represent the shafts connected to the planet gear carrier, ring gear, and sun gear. Programs also cover shafts, axles, and bearings, along with splines, interference.

A planetary or epicyclic gear trains comprises of one or more planet gears revolving around a sun gear. To add a second gear pair, you must add a second line with a. A carrier connected to a drive shaft holds the planet gears. Planetary gear trains are one of the main subdivisions of the simple epicyclic gear train family. They are great speed variation mechanisms, and are often. At the same time, expectations for gear reliability are high. This calculation software gives complete product information in the early phase of the product lifecycle plc. An update on the latest gear design software from several vendors, plus what gear design engineers can expect next. Final assembly of a 3 stage epicyclic planetary reduction gear with an arm at each stage results and discussion a 3 stage epicyclic planetary reduction gear was designed with the help of catia software. This christmas seasons i put my printer to good use making unique presents for my family. Modelling planetary gear pairs has become more complex because of a new mech designer rule the new rule is you cannot use the same line as the lineofcentres for more than one gear pair before r11. Branch rickey please see faq7376 for tips on how to make the best use of engtips fora. Gear generator is a tool for creating involute spur gears and download them in dxf or svg format.

Two forms of planetary gears of the bevel type are shown in figures 23 and 24. If the carrier is acting as the input in the planetary gear system, rotating the ring gear while the sun gear is still, divide the number of teeth on the ring gear the driven gear by the number of teeth on the planetary gears the driving gears. As you launch this software, it lets you define the module size in mm, number of planets, segments per flank, number of teeth in internal and planet gear, etc. Each cad and any associated text, image or data is in no way sponsored by or affiliated with any company, organization or realworld item, product, or good it may purport to portray. From a kinematic point of view, what sets this mechanism apart is the kinematic constraint set between gear pairs. Calculating gear ratios within a planetary gear set youtube. However, for a handcranked model, the practical limit is 3 stages. Design, load analysis and optimization of compound. Planetary gear trains are common in industrial, automotive, and aerospace systems. Gearify allows you to design gear mechanisms of nearly any shape. While ive never had to actually design and build a planetary gear train myself, i suspect that perhaps your problem may be in assuming that the three planetary gears must be at a 120 degree spacing. You can model most gear design arrangements and gear trains. As the weigh is 60%, and half the size of a conventional gear box, it is very likely to have a misconception that it is not as strong.

Planet gears are just idle gears from the force perspective, and. Gearify software noncircular gear creation software for. Working out planetary gear turns ratios working out the gear ratio of a planetary gear train can be. Designing this toy definitely took a few tries to get the desired effect. In a planetary gearbox we see a sun solar gear, satellite ring gear and two or more planet gears. Design and optimization of planetary gears considering all relevant influences tobias schulze gear design process lightweight construction and consideration of available resources result in gearbox designs with high load capacity and power density. Product evangelist product engineering software siemens plm software inc. Mechdesigner software makes it easy to add gear pairs that will transmit motion and force naturally through the mechanisms linkages. Design and operating principle of a lowbacklash planetary gearbox duration. Design and optimization of planetary gears considering all. The designs can be exported into dxf and svg files for use in other software. Planetary gear designer is a free program to design simple planetary gears. In order to calculate accurate impact forces, an impact model is chosen. Everything about gearotic can be utilized as an easy to use, drag and drop designer front end that simplifies difficult processes into your own masterpiece we hope you have fun playing with.

Lts will create planetary gear, spur gear, or involute spline design software tailored to meet your unique technical criteria. Planetary units with helical gears, rather than spur gears, have. It is aimed at students in the upper grades of primary school and works on your pc, tablet and smartphone. Methodology of design the design of planetary gear trains consists of following steps. Planetary gear question mechanical engineering general. Planetary epicyclic gear ratios equations and calculators. They are used to achieve high gear ratio within limited space. In this example, gear 1 and gear 3 are on the same axis. Epicyclic gearing systems also incorporate the use of an outer ring gear or annulus, which meshes. Especially for design concepts of planetary and spur gearboxes, the newest software development of driveconcepts gmbh mdesigngearbox is established. The epicyclic gear train model is taken from bhel, and some of its parameters have been.

A bigger canvas, planetary gears, simple object properties and tablet support. A simple method for calculating planetary gear ratios is described which can be used to determine quickly the potential usefulness of any planetary configurations. The point at the centre of the gear 1 in gear pair 2, must be merged, with the point at the centre of gear 2 in gear pair 1. Gearsketch is software were developing for learning about gears.

Planetary gear design a planetary gear system, also referred to as epicyclic gearing, consists of three elements a sun gear, one or more planet gears, and a ring gear. The usefulness of planetary gear trains and the engineering techniques necessary for optimum design are discussed in this paper. The planetary gearbox got its name because of how the different gears move together. Gear design software to model most gear arrangements. Planetary gears a masterclass for mechanical engineers. There are two main gear trains in a clock, the minutes train that requires a total ratio of 60. Or check out one of my other posts like adding support, dont waste material on your 3dprints. Backlash between the sun gear and planet gears are precisely specified to avoid teeth interference and undercut. With the right feedback, you can get your software developer to work for you to provide the most relevant features possible. The planetary gear set, also known as the epicyclic gear train, is one of the most important and interesting inventions in engineering.

Gears can be animated with various speed to demonstrate working mechanism. Typically, the planet gears are mounted on a movable arm or carrier, which itself may rotate relative to the sun gear. This is a fully functional handcranked model of a multistage planetary reducer. It becomes coincident with the lineofcentres of the first gear pair. Users can choose the number of planets, segments per flank, and the number of internal and planet gear teeth. Reverted gear trains are a type of compound gear trains in which input and output shafts are on the same axis. Calculation of gear dimensions gear dimensions are determined in accordance with their specifications, such as module m, number of teeth z, pressureangle. This is good for testing the approximate speeds on a gear train. Sure, there are other offtheshelf design software packages available, but using it often involves compromises in your design that you probably wouldnt prefer. Riveted gear train gear ratio is calculated similar to compound gear train. Feb 28, 2017 the planetary gear set, also known as the epicyclic gear train, is one of the most important and interesting inventions in engineering. Lightweight design for planetary gear transmissions. This does not generate planetary gears, and im also unclear as to how design a planetary gear with a 2.

You can edit and analyze all of its kinematic properties. Gear train with sun, planet, and ring gears matlab. Software tools for sizing and selection let design engineers quickly find and compare gearheads that suit an application. Jan 19, 2015 download planetary gear designer an intuitive and portable application that helps users create planetary gearing designs and save them to dxf file format with minimum effort. Hence the author has taken the work on design of compact planetary gear train used in gear boxes used for automation in car parking systems. There would be numerous applications of planetary gearbox, but i will anser with the one which im sure about. All the three stages are designed separately and then assembled together with the help of arm and shaft of required dimensions. A key part of gear design software development is customer feedback. An epicyclic gear train also known as planetary gear consists of two gears mounted so that the center of one gear revolves around the center of the other. Mechdesigner software makes it easy to add gearpairs that will transmit motion and force naturally through the mechanisms linkages. This block models a gear train with sun, planet, and ring gears.

For example, if the carrier is held stationary, the gears essentially form a standard, non planetary, gear arrangement. In addition it let you compose full gear layouts with connetcted gears to design multiple gears system with control of the inputoutput ratio and rotation speed. A carrier connects the centers of the two gears and rotates to carry one gear, called the planet gear or planet pinion, around the other, called the sun gear or sun wheel. A typical application is the automatic transmission system of car. The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and owned by third party users. Everyone with a workshop or a garage got a custom geared light switch cover. Design of lightweight planetary gear transmissions. The planet gear in figure 23 rotates about a fixed bevel gear at the center of which is the driven shaft. Jan 07, 2017 but if you are using fdm 3d printed gears anyway, then good enough is good enough. Planetary gear train design software mrgear mechanical op 24 mar 04 08. Recent articles in gear solutions have discussed epicyclic gearing, but often in the context of experienced engineers. The planets will spin in the opposite direction from the sun at a relative speed inversely proportional to the ratio of diameters e. Planetary gears are common in transmission systems, where they provide high gear ratios in compact geometries.

Gear generator is a tool for creating involute spur gears and download them in svg format. Each input shaft is applied with a preset torque of 300 nm and a speed of 1,500 rpm. Download planetary gear designer an intuitive and portable application that helps users create planetary gearing designs and save them to dxf file format with minimum effort. How to calculate the gear ratio in a planetary gear set where one member is stationary. Calculation of gear dimensions free gear guide khk gears. Planetary gear designer is yet another free gear design software for pc. Thus the loads have to be minimum to reduce the stresses in the gear train. You will see below, the models use one line as the lineofcentres for gear pair 1 and gear pair 2 r11 and after.