Mechanical drawings is committed to giving our automotive and engineering customers the best mechanical design and mechanical drafting conversion results. The electric wheel hub motor was raced by ferdinand porsche in 1897 in vienna, austria. Although the electric scooters are using electric motor, it still called as scooter. Meadinfo shares knowledge on machine design, mechanical engineering fundamentals, latest technologies, industrial automation, cad, engineering calculators, tutorials and training. Determine torque in shafts from gears, pulleys, sprockets, clutches, and couplings. Motor vehicle mechanics textbook, fifth edition is a textbook on the maintenance and repair of motor vehicles that balances theory and practice. In regard to the united states, electric bicycles are not as popular as in the other countries mentioned and most electric bicycles are imported. Our dc motors are then manufactured in total compliance with these exact requirements. Rock, texas, electrical and mechanical engineering teams develop precision design and manufacturing specifications for each order. This article gives a systematic overview of elements of a controlled electrical drive with emphasis on the control system design. Mechanical engineering drawing concordia university.
The ball slides within a bored cylinder, against the pressure of a spring, which pushes the ball against the detent, a hole of smaller diameter than the ball. Electric motors formatted to fit inside the wheel of a vehicle have their own special constraints that. Machine design, mechanical engineering design, etc. A bearing is a machine element that constrains relative motion to only the desired motion, and reduces friction between moving parts. A great article about the worlds first hybrid electric car, the lohner porsche semper vivus, developed around 1900, which used hub motors in the front wheels. Aug 12, 2017 design hub how to read pipe and instrument drawings. Ac motor basic stator and rotor operation diagrams. Oct 17, 2015 this video covers how to design a engine block for a v12 engine. An ac motor converts electric energy into mechanical energy. Fundamentals of mechanical drafting 103 there are two kinds of oblique drawings. The motor drive design uses the 48v battery only to drive the motor and is.
The tapered key is tapered only on the side that engages the hub. Mechanical engineering drawing book pdf mechanical engineering drawing book pdf, engineering drawing symbols and their meanings pdf at drawing design then we can present our concept in a drawing format hehe the video tutorial link is added. In learning drafting, we will approach it from the perspective of manual drafting. The name and or drawing number of the assembly drawing in which the detail drawing is called up or used on is stated in the title block. Find free downloads for supplier parts models, component models, 3d parametric models and supplier component downloads, including free cad drawings, assembly models and full 3d cad models. Inwheel electric drive motors represent an effective method of providing propulsion to vehicles which otherwise were not designed to have driven wheels. Detail drawings seldom describe the intent of an engineering design. Spatial limitations motor must interface with suspension arm. Comments or inquiries concerning this manual should be directed to the mechanical. Find mechanical drawing stock images in hd and millions of other royaltyfree stock photos, illustrations and vectors in the shutterstock collection. Printed circuit board drawing defines all of the parameters and requirements for the vendor to manufacture the p.
The engine or the electric motor is used as the driving mechanism, and the transmission and the. This tutorial will introduce the user to the fundamental electrical and mechanical principles of ac electric induction motor design and application. Electric bicycle motors electric bike motor systems the. Common mechanical engineering terms ball and detent n a simple mechanical arrangement used to hold a moving part in a temporarily fixed position relative to another part. Dc brushed motor nomenclature brushed dc motors without a gear box can be estimated to be 80% efficient, meaning if a motor is drawing 60 watts of power 48 watts will be turned into mechanical energy and 12 watts will become heat. That is, theyre great for ev hacking and conversion. Use these free part models by dropping them directly into your 3d design or as part downloads for your solidworks parts library, inventor parts library or autocad parts library. In addition to the single row design, there also are double row, angular contact and ball thrust bearings.
This book on machine drawing is written, following the principles of drawing, as recommended by bureau of indian standards bis, in their standards titled engineering drawing practice for schools and colleges. In lessefficient motors, the amount of power wasted can be reduced by more careful application and improved motor design. Brushed dc motors without a gear box can be estimated to be 80% efficient, meaning if a motor is drawing 60 watts of power 48 watts will be turned into mechanical energy and 12 watts will become heat. Use simple shapes you have experience producing using the manual machines in the lab. Machine design elements and assemblies pdf michael spektor industrial press, inc. Harley and yao duan georgia institute of technology november, 2009. Axial gap gives compact machine construction and short frame with much.
The difference in this work is the design of a direct drive electric motor which is able to carry. Tida00281 is intended as a brushless dc motor drive design for automotive applications like electric pumps, cooling fan, turbo compressor, and so forth. It depends whether youre talking about an electric bicycle or an electric car. The purpose of the taper is to secure the key itself, as well as, to firmly engage the shaft to the hub without the need for a set screw. Bearings bearings are machine elements that allow components to move with respect to each other. Specific emphasis will be given to pump applications. Next, you switch from the detailed drawing to the assembly drawing you are creating. In addition, the design is unusual because it uses two. Discover the mechanical engineering technology channel at and discover an authoritative new voice in technology offering information for the novice, the student and the practicing professional. We can work on over 300 different image formats such as img, jpeg, pcx, pdf, pict, gif, tiff, etc. Oct 28, 2015 a servo motor is a linear or rotary actuator that provides fast precision position control for closedloop position control applications. Conversion to mechanical power by motors pumps, fans, hvac, refrigeration compressors, power tools, food processors, escalators, elevators. Mechanical drawing software is designed to help the draftsman to get the mechanical draft designed efficiently within a short time. In mechanical engineering, a key is a machine element used to connect a rotating machine element to a shaft.
If you are a designer or an engineer, you can really speed up your design projects using traceparts cadcontent platform. Adding a hub motor and batteries to a bicycle is a mixture of pro and con. To prepare a drawing, one can use manual drafting instruments figure 12 or computeraided drafting or design, or cad. The most common and important features of a brushed dc motor are detailed in figure 1. The key prevents relative rotation between the two parts and may enable torque transmission. A project submitted in partial fulfillment of the requirements for the award of the degree of bachelor of science in mechanical and manufacturing engineering. To connect the servo motor used in nc machine tools with the ball screw, an exceptional usage of the coupling as shown in the diagram below on the right is possible. In this case, parallel misalignment is controlled by fitting the motor. For example, initial calculations may have indicated that a certain size motor was required, but in designing the power transmission system, the motor size may decreaseincrease depending on the inertia and efficiency of the. Following is the list of few of the best picked mechanical drawing software. Most ebike motors are mounted on the front or the rear wheel hub 4,5. In the case of common ac that is used throughout most of the united states, the current flow changes direction 120 times every second. Submitted to the graduate school of engineering and natural sciences.
An introduction to electric motors stmicroelectronics. Usually, a drawing represents something that exists just at conceptual level why not use pictorial representation. Automotive 1kw 48v bldc motor drive reference design. The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and owned by third party users. The keyway in the hub has a taper that matches that of the tapered key. For example, initial calculations may have indicated that a certain size motor was required, but in designing the power transmission system, the motor size may decreaseincrease depending on the inertia and efficiency of the power transmission system. Safety in the motor vehicle workshop is also considered. Thorough testing of every dc motor we build is conducted at our manufacturing plant in round rock. Keys and keyways 51 introduction university of babylon.
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. Mech 211, mechanical engineering drawing welcome to. Pc board design layout drawing printed wiring assembly drawing shows all components mounted on the printed circuit board along with notes clarifying assembly techniques and general specifications. In some states, the federal law and the state law for electric bicycles differ. The basic drawing standards and conventions are the same regardless of what design tool you use to make the drawings. Some gearboxes look very similar, it does not mean parts will interchange, check all part numbers if changing parts. Cad render of prototype formula sae electric vehicle. Although the slotted armature implies increased losses from flux ripple and tooth iron losses, the increased robustness is necessary to combat the mechanical. The drawing may not be exact to scale for size, same drawing may be for different gearboxes, this refers to gear sizes and in some cases gear location, read all directions before assembly. You can expect the software with predefined entities to get the design quickly. Splines provide a more uniform circumferential transfer of torque to the shaft than a key. The characteristics and uses of each type will be covered in chapter five.
Pdf motor vehicle mechanic free ebooks download free. Make your own miniature electric hub motor instructables. This is the only book on machine drawing, incorporating the. The lack of mechanical contact means that static friction can be eliminated, although viscous drag occurs when fluids are present. An engineering design is usually defined by many individual detail drawings which combine to form an assembly drawing. Once a gear box is added the overall efficiency of the system goes down. If you want other possibilities use drawing function and in the line drawing function. The hub i designed is unique because it runs in rigid, teetering, or independent bladeflapping modes. I received a request from the nwtc to design a twobladed hub for the experiment. Optimal design of an axialflux permanentmagnet middle motor.
The next page shows a drawing of a wheel hub design used with the entstort 44 rpm right. The mechanical design, analysis, and testing of a twobladed. Mechanical trade engineering drawing important symbol. Mechanical drawing lecture 5 keys and keyways 51 introduction a key, fig. School of mechanical engineering, taiyuan university of science and. Hubs are typically attached to motors by closely sliding over and locking. Porsches first engineering training was electrical, not internal combustion based.
For my thesis, i present the results of the mechanical design, analysis, and testing of the hub. Friction will help transmit torque and provide resistance to axial motion of the hub relative to the shaft. Traditional design of cage rotor induction motors ronald g. Engineering drawing important symbol for mechanical trade. Figure 3 shows the engineering drawing and design parameters of. Electric bicycles produced in taiwan are mostly exported to europe. It is certainly true that hub motors bypass practically all the mechanical losses. All engineering directorate design organizations and their contractors shall adhere to the requirements of this manual when preparing gsfc engineering documentation for flight hardware and ground support systems. Engineering drawing semester iii mechanical engineering department technical university of gda nsk lecture 1 112. This conversion is usually obtained through the generation of a magnetic field by means of a current flowing into one or more coils. You can do this by clicking on the big red a in the upper right corner and select the assembly drawing in the list of open files. The electric bicycle system is a systems project that incorporates three different ways of charging a lithiumion battery. Jul 01, 2019 a hub motor with a builtin planetary gear and clutch.
Similar in principle to the gears used in manual gearboxes in most roadgoing vehicles. During the brushless dc motor design phase, portescap engineers aim. There are two major types of splines used in industry. J american society for engineering education the american society of mechanical engineers diagrams including proposed usa standard for connection diagrams and terminal diagrams. Find bending moments from gears, pulleys, or sprockets that are transmitting loads to or from other devices. Paste the view from the detailed drawing into the assembly drawing by holding down the ctrl key and pressing the v key. Mechanical design the design of autonomous mobile robots capable of intelligent motion and action without requiring either a guide to follow or a teleoperator control involves the integration of many different bodies of knowledge. The design goal was a motor drive design that could work with the emerging 48v and 12v battery systems in industry.
Pdf electrical scooter mechanical engineering design 1 uitm. Mechanical drawings mechanical design mechanical drafting. The purpose of the project is to show that it is possible and relatively simple. In this case, parallel misalignment is controlled by fitting the motor in a line with the casing. Insidepenton com electronic design adobe pdf logo tiny. Pdf this article designs a pivotsteering electric chassis based on. Topics covered range from engine principles and components to maintenance of the lubrication, cooling, and fuel systems. Brushed motors, the more conventional design, use a mechanical commutation where a rotating armatures with brushes are used to make the electrical connections. Cad or autocad programs allow users to draw up and see prototypes of their design. By using this website you agree to our cookies usage and data transfer in and outside of the eu. Mechanical design executive summaries autonomous mobile robot. Creating mechanical parts and assembling them with drawing sheets may get time consuming and complex.
As a result, he developed his first cars as electric cars with electric wheel hub motors that ran on batteries. The taper will impart a compressive contact pressure between the hub and the shaft. Servo motor types and working principle electronics hub. Pdf electric chassis design based on a hub motor researchgate. Tecowestinghouse motor companys position of industry leadership comes from an uncompromising commitment to quality manufacturing and customer service. Some taper keys have a gib, or tab, for easy removal during disassembly. The electric machine designed in the thesis is switched reluctance machine. Mechanical engineering archives bright hub engineering. Contacttype bearings have mechanical contact between elements, and they in clude sliding, rolling, and flexural bearings. The academic course of machine design elements and assemblies a. Servo motors have a high speed response due to low inertia and are designed with small diameter and long rotor length. In a cabinet drawing, receding surfaces are drawn onehalf size.
An ac motor uses alternating current in other words, the direction of current flow changes periodically. Mechanical energy what is an electric motor an electric motor is a device converting electrical energy into mechanical energy usually a torque. Figure 1 shows an exploded view of a typical motor hub wheel assembly. Design optimization and analysis of an outerrotor direct. Motors with 100 volts, or higher ratings, are used in appliances, automation and in industrial applications. Compare combined stresses to suitable allowable stresses. Mechanical system design tapered keys designed to be inserted from the end of the shaft after the hub is in position. Unlike large industrial motors, a servo motor is not used for continuous energy conversion. Each type of bearing has its own niche application area, and thus design engineers must be familiar.
The hub must be capable of rigidly supporting its share of the robots weight without failure during its expected life span. Computer aided design cad is an extremely helpful tool for mechanical engineers. Electric bicycles can be used for a variety of purposes, for instance, as a vehicle for police or law. The machine is selected for a highperformance electricbike as a. Roller bearing one variation of roller bearings the tapered roller is used extensively for fleet, automotive and other vehicular applications. The dapu geared hub motor is made by a japanese company in shanghai, china. Thousands of new, highquality pictures added every day. The information contained in a drawing must be used to build an accurate componentsystem. A\ hub motor has to draw a higher current for the same torque output, and.
The drawings for the sun, planet and ring gears are provided in the. For a key to function, the shaft and rotating machine element must have a keyway and a keyseat, which is a slot and pocket in which the key fits. Download free cad drawings, technical data for engineering. If the hub geometry and material selection are inadequate, the hub can break completely or bend so much that the motor can not effectively accomplish its task. The basic procedure of feedback and feedforward cascade control system design is presented for the. Mechanical power transmission hub design hubs are used to transmit mechanical power from a drive motor by coupling it to an output device such as a wheel or an arm. My friend got ripped off when he bought this electric bike.
Shaft design objectives compute forces acting on shafts from gears, pulleys, and sprockets. Acavalier drawing and a cabinet drawing are drawn in the same manner, except that a cavalier drawing is always made to the exact measurements of the object. The reduced moving parts give brushless motors a long life, limited only by wear on ball bearings. This motor type is distinct from a direct drive motor like bionx, and has a variety of benefits stemming from its design that can be appreciated in its unique ride feel and performance.