Connect electric normal . Is this why ?

1 phase angle may be wrong. Song is the degree of control is not written above 120 degrees , write degrees is 60 degrees.
2 Santroll matching controller is not very strong , especially rare motors on the market , so for another just fine with .
3 may be a phase when you start wiring wrong, jitter weakness and other phenomena, who rode to put the controller burned , so you do not turn up later then how can you be sure that the Battery powered bikes controller burned. Before wiring , the first to detect motor Hall is good or bad , angle, winding and magnet motor is normal, then use the accompanying controllers, such as voltage , current limiting , angle , phase , etc. The key is to be consistent with the angle of the motor controller , otherwise they might forever . Motor angle detecting very simple , as long as there are three high three Hall signal is low, that is 60 degrees, the controller detects an angle relatively quickly and accurately with the instrument . After the above work , electrical wiring 60 degrees within 10 minutes and 120 degrees within one minute to get the motor . 27 , and the line on the color phase motor problems on the green on the motor , blue, yellow, in the end what is the Three wheel bikes representative of each phase ? Some places to see A, B, C phase , and sometimes see is W, V, U -phase ? Most standard A, B, C phase is represented by what color , with green, blue , yellow, how correspondence ? There are green, blue , yellow, three -phase line controller coarse , sometimes with 3 phase motor is completely linked by color , simply can not be transferred , and why ? Many plant previously used this provision : A- Yellow , B- Blue , C- Green . Latest national standard " electric bicycle motors and controllers" ( draft) 4.6.1 states: motor terminal A- blue , B- Green , C- yellow. Hall outlet color requirements with the motor. A --- U, B --- V, W --- C motor factory in order to do some changes in the electrical outlet different colors, with matching controllers for each manufacturer had to change the way the outlet . 28 , brushless controller detects stall current, battery cathode series digital multimeters, clamp meter Cece any other motor with a thread , both the current reading is inconsistent, digital clamp meter multimeter relatively large in terms of many , why ? Power input current to prevail . Motor current is pulsating , not easy to measure accurately , in addition to

Electric Bicycle (electricbicycle)

To the battery as an auxiliary energy, with two wheels, to achieve human riding, electric or electric-assisted bicycles special features. Technical requirements:
1. Maximum speed: should not electric trike exceed 20km / h; ("Exchange Act" 58 stipulates that the maximum speed of the electric car is not more than 15 km)
2. Vehicle Quality: not more than 40kg (including battery);
3. Foot traffic capability: You must have a good ride pedal function, 30min foot travel distance should not be less than 7km;
4. Continued mileage: After a charge to continue the mileage should not be less than 25km;
5. Maximum Ride noise: the maximum speed for electric uniform riding (electric assisted to 15km / h ~ 18km / h speed electric Three wheel bikes assisted riding) noise should not exceed 62dB (A); 100km energy consumption should not exceed 1.2kW · h;
6. 100 km power consumption: with electric ride (electric power to electrically assisted cycling), the power consumption of 100km.

Cargo bike crane hook

Mainly by the bridge, traveling mechanism , trolley , electrical equipment and other components. Depending on the frequency of use is divided into A5, A6 two working levels.
Main features:
( 1 ) box girder bridge using automatic Three wheel bikes submerged arc welding.
( 2 ) I-beam track cable car conductive conductivity using a new device , safe and reliable.
( 3 ) Lifting mechanism can be set up in accordance with the requirements second safety device. Increased reliability.
( 4 ) parts standardization, serialization, universal .
( 5 ) control room vision, all the agencies in the control room manipulation, manipulation of flexible working comfort .
Selection methods :
By job level , using industry . No  matter what level you choose , the first in the industry choose to calculate start , electric cycles / 1h, daily practical time and continuous use time (h) indicated . Selection or signed , you must clear the industry , the size limit , the power Folding electric bikes supply side , ambient temperature, speed, time, intermittent or continuous , starting point times / 1h. Jun reference for the above requirements . Selection, design , in order to better match the reasonable improve efficiency

Low headroom Electric Bicycles Features

1, the best headroom than ordinary CD hoist lifting height can raise 200 ~ 500mm.
2 , excellent three- drive technology , lifting gear made ​​of high quality alloy steel , triple reduction , smooth operation , long life, reliable performance, avoids many of the disadvantages of the Three wheel bikes intermediate shaft hoist CD drive long distances .
3, the motor is a new type of self-cooled motor specially designed cone , motor housing is a good thermal performance of cast aluminum alloy materials , electrical insulation class F , protection class IP54, motors are higher than normal level .
4 , the electrical components of a world-class Schneider products , with large capacity and other components , control switches and motors and electrical components connected using quick plug , make on-site installation of more efficient ; hoists are all part of the cable leakage protection PE corrugated pipe ensure reliable cable connection .
5 , according to user requirements to: gourd running , lifting single and double speed or frequency stepless control , remote Folding electric bikes operation , overload protection, motor overheat protection and other features.
6 , compact structure , appearance, with many unique innovations:
( 1 ) no leakage cable hoist body , through various means throughout the cables are arranged in the inner gourd , gourd looks so much more beautiful ; such as: supporting shaft is hollow thick-walled steel pipe, under the premise of ensuring the use of strength , reducing the overall weight of the hoist , hoist around and through it to achieve the passage of cables .
Compact ( 2 ) gourd structure counterweight counterweight box , the user can add a variety of scrap steel or stone , etc. , saving the steel counterweight while representing low- headroom hoist reduced dimensions ;
( 3 ) hoists run using NF series helical gear reducer drive , both sides of the drive wheel to transmit torque through a six-rowed steel , large torque , high reliability , to avoid the situation of flat key shear failure , and this transmission installation is very conducive to running part of the gourd regulation ;
( 4 ) Lifting the host portion of the housing is rectangular welded structure, both sides mounting bolt holes , high versatility , you can quickly switch from fixed or suspended trolley electric hoist , and 360 ° out of rope .
7 , the entire structure for easy removal , installation, easy maintenance and good maintainability .

Electric tricycle (Electrically operated tricycle)

Is for the battery -powered motor -driven pull cargo or pull people use three vehicles . Electric tricycle is for battery -powered , motor -driven pull cargo or pull people use the three vehicles . Electric tricycle use is divided into household type , cargo type , electric trike -type models. Electric tricycle using tube capacity , so lining, deep discharge , traction battery , can work continuously for a long time to adapt to the requirements of discharge , battery normal use for two years , capacity has not Three wheel bikes. Electric tricycle motor DC series wound traction brush or brushless motor, internal motor has a speed booster , normal use is not easily damaged , ensure a strong power output .

The main components of electric tricycle carrying

Currently, electric tricycle frame design is still mainly rely on traditional design experience and a road test to complete. Due to the limitations of this approach , combined . The use of advanced analysis software ( eg ANSYS) force and strength to the frame to analyze the situation , to draw relevant static and dynamic mechanical properties and Three wheel bikes index is to solve the above problem of effective solutions. In this paper, Ltd. Henan Loncin motorcycle design and production of a first heavy laden electric tricycle frame static and dynamic mechanical properties were analyzed to obtain its mechanical performance parameters, and the frame structure is carried out with the motor resonance mode modal analysis , experimental and finite element analysis to predict the results of modal data for comparison, proposed preventive motor and frame resonance possible solutions . The main contents are the following aspects: Firstly, the basic theory of finite element analysis and related mechanical basics. Secondly , the use of three-dimensional design software Folding electric bikes create a physical model of electric tricycle frame and finite element simulation of three-dimensional models into platform A. .. frame is the main component of solar electric tricycle carrying at work not only to support the tricycle the weight of each component , but also bear came through the ground reaction force damping device , tensioning force and the work load and other buffering role in ensuring the solar electric tricycle frame vehicle service life and reliability plays important role in the smooth tricycle steering , driving safety , ride comfort and in a variety of road conditions and the frame structure by sex are inseparable relationship . Development of new agricultural solar electric tricycle frame for the study of transport , the use of general-purpose finite element analysis software MSC. Patran / Nastran for solar electric tricycle frame , made a comprehensive analysis of the performance of the simulation . This paper established a board unit as the basic unit of the finite element model of the frame , based on the model established by the two conditions of static stress frame frame analysis to identify the weak links in the frame ; followed by a frame modal analysis to identify the frame natural frequencies and mode shapes ; then frame made ​​of random vibration ( response spectrum ) analysis, frame irregularities in the road surface displacement response of the dynamic stress response and excitation to determine the performance parameters of the frame , the frame allows us to have a performance on a more comprehensive and objective understanding.

Part of the bicycle

In 1888, Ireland's veterinary Dunlop, get inspiration from healing cow stomach gas expansion, he spent in home garden Folding electric bikes rubber and glued into round, play enough gas, mounted on bicycle wheels, to ride a bike race, incredibly, aroused people's great interest. Pneumatic tire is a landmark in the development history of the bicycle in the world, it increases the flexibility of the bicycle, won't because the road is rough and vibration; Greatly increased the speed at the Three wheel bikes time, reduced the wheels and road surface friction. So, it is fundamentally changing the bike ride performance, perfect the use function of the bicycle. Therefore, since the end of the 18th century, until the beginning of the 20th century, the invention of the bicycle and improvement, through about 200 years, there are many to strive for, to evolve into the style of this ride freely now.
Of a bicycle
(1) body parts: including frame, front fork, handlebar, saddle and front fork fitting and so on, is the main part of the bicycle.
(2) transmission parts: including the pedal, crank, sprocket, chain, axial and flywheel, etc., by human pedaled pedal, drive a drive wheel rotation, through the above drive forward.
(3) action part: front and rear wheels, including front axle parts, spokes and rim (circle), tires, etc.
(4) safety device: including brake (brake), car lights, bell, reflectors, etc.

The origin of the word

the first time in the word, and is still in use. In 1790, a French name, with his mind he loved so much. One day, he walked on a street in Paris, because the day rained, Folding electric bikes a lot of rain, on the road is very bad. All of a sudden, a carriage jumped from behind, and the road is narrow, the carriage is very wide, the schiff, hide to hide but not knocked down by a car, or was spattered mud and rain. Others saw it, sorry for him, but also gas straight scold, want to shout the cart stopped, reasonable representations. The schiff, but murmured: "don't cry, don't shout, let them go." The carriage walked away, he was standing on the side of the road. He was thinking: the road is so narrow, pedestrians and so much, bike why can't the carriage structure changed? Should the carriage along the cut off half, before and after the four wheels to two wheels... He thought, so home will begin to carry on the design. After repeated experiments, in 1791 the first Three wheel bikes "Trojan horse" of the car made out. Before and after the car has two wooden car wheels, intermediate connecting beam, Ann on a bench, like a toy. Because the car hasn't drive chain, by cyclists foot pedal, the car can move forward slowly, but also no steering device, the car can go straight, don't turn, go out to ride soon tired covered in sweat. Just a new things is not so perfect. The schiff, don't lose heart, he continued to think of some way to improve it. Unfortunately, he died soon. In Germany in 1816, has a look man named Lin dera ismail, he from CunDong this forest, every day go to the village west of the other trees, so every year. He thought, if people sit in the car, stop-go, follow one's inclinations, not very natural and unrestrained? DE les starts to make wooden wheel car, with the schiff, made almost. However, on the front wheel and a control direction of traverse to the child, to change the way forward. But when the cycle is still want to use two feet, hit the stamped on the ground, rolling forward to push the car. When the DE les to ride a bike to go out, test, was laughed at by many people along the way. In spite of this, he is very like your writing the "cute little pony". A DE les when cycled around driving a carriage, the driver laughed at he said his car slowly, so he and the driver said: "your letter not letter I car faster than your carriage" and they two made a bet. Distance from CunDong to village west of a back and forth, results DE les is faster than the driver for more than an hour. In 1840, England's blacksmith McMillan, got a battered "cute little pony". He put the crank in the rear axle and then use join the pedal in front of the crank and connecting rod, and the front and back with iron, the front wheel, rear wheel small. When the cyclist pedaled pedal, the car will be on their own motion, ran forward. In this way, really make the cyclist's feet off the ground, with alternating feet trample move into the wheel rolling, greatly improved the driving speed. In 1842, the macmillan ride this kind of car, ran 20 km a day, due to accidentally hit the car too fast, hit a little girl on the road, which was caught by the police, and impose a fine. The charges are "wild ride". Bicycle in 1861, France michaud of father and son, originally profession is the carriage repairman, they installed in the front wheel can turn the pedal board; Top of the saddle seat frame of the car in front so that unless technology special superb ride a bike, or grasp the handlebars, will fall down from the car. They put the two rounds of car box (ossuary) dubbed the "bicycle" James, and exhibited in Paris in 1867, fair, let the audience an eye-opener. In 1869, Britain's Renault after watching the French bicycle, feel the car is too heavy, start thinking about how to put the bike done some light. He USES the steel wire spokes to tighten circle as the wheel; At the same time, the use of thin steel bar to make the frame, the front wheel of the car is bigger, the rear wheels. To reduce the weight of the bike itself. Since the schiff, has been to Renault, it made the five types of bicycles and modern bicycles difference is bigger.

the reason why China is called "the kingdom of bicycles"

Driver only one thousand title of "the kingdom of bicycles" registered in China is a myth, the reason why China is called "the kingdom of bicycles", because China is in the number of bicycle ownership and Three wheel bikes in the world. But most only stay in transport at this sense, the bike as leisure fitness is one of the few, where there is little to cycling level. Mention the tour DE France, Han Jiling clearly said China driver is apart from the tour DE France is still some distance, "at the moment we are only a few drivers in a foreign country club, Chinese drivers ring method in field, I think there is still a long way to go." And driver Li Fuyu also think according to the actuality of China bicycle to want to join the tour DE France also electric trike time, "China billions people only more than 1000 drivers, and France has more than 20 registered driver. Many foreign experts believe that China's driver is very lack of competition, exercise, play too little. In France, registered bike race every year, more than 10000, while China doesn't even have one percent." Giant bike bike - international online features: according to the daily mail reported, a Dutch art professional college students collected all kinds of vehicles with from his friends made a giant bike parts, he rode the two meters tall monster in road scene is enough to attract the attention of all people. Walter, 29, the Vatican's bush was a mechanical engineer, currently studying art in college. Walter like with different USES parts making machine "hybrids". Near the graduation, he decided to own hobby further extension, at the same time into the art factors, creating a "big guy".

Bicycle inflatable note right amount

Bicycle inflatable note right amount. Tires under-inflated, resistance increases, driving, outer tube wall on vulnerable to fracture; Inflatable foot, wheels lose elasticity, laboring heavily at tyre force is too large, tire in the cord layer are easy to be broken, shorten service life. In addition, don't ride a bicycle when stored for a long time, also electric trike have the gas played right amount. Can anoint, nor the sun exposure; Bike every coated with the paint coat in the car, not car wax polish, will drop paint; After the bicycle in the rain, with dry cloth blot moisture, prevent rust; To place such as axle, flywheel, front fork, pedal, often should add some Three wheel bikes or oil, flywheel should add some thin oil. The bike with kerosene wash once a year. Note bikes not stored near the heat, the place such as kitchen, coal stove, avoid carbon monoxide gas corrosion. Teach you tips: elastic first lock nut loose, pull brake, brake lining and the circle of the spacing for 3-5 mm, screw tight lock nut again, if the asymmetry of left and right brake lining, should hold is the front and back, or eliminate.so axial flap, brake fork or correction to stick with loose bicycle crank and axis, first find out which side is loose, and then under the loose on one side of the crank support rods, bars the crank pin, tighten the nut. The old car can change a bit bigger crank pin. Such as crank pin wear or crank pin hole enlargement, can be in between the circular arc of the crank pin and axial stick on the pad iron, to prevent loosening. 24 or27 section of transmission, it is usually use 26 tires, 15 to 18 frame, and the front fork with a shock absorber. Mountain bike, is only the general, all no road curved, no small wheels car cushion, people called the mountain bike. Careful friends can discover, mountain bike also have many differences, such as: some front fork shoulder, have a plenty of one shoulder; With the disc brake, V brake; Have a plenty of rigid frame, have a plenty of full suspension frame; Another popular point, some car looks very big, some very fine... In fact, they are all mountain bike, just use different.

Humanized design in the modern product design

Humanized design in the modern product design
Humanized design is to point to in the design process, according to the structure of human behavior, physiology, psychology and thinking mode etc., on the basis of the original design, optimize the design object, so as to make the audience feel convenient and comfortable. Humanized design pays attention to humanistic care, emphasis on respect for human nature. Humanized Three wheel bikes in the modern product design, mainly has the following several aspects: first, the embodiment of humanization design in product function (1) physical function of product use value is the primary material function. (1) the reason why people have the demand for products, it is because to get its use value, function. Good function for a successful product design is very important. Such as: supermarket Cargo bike cart rack design gratings, with children shopping can be a child on the inside, so that we can make shopping more convenient, easy and pleasure; To produce mobile phones nokia, according to different users (business people, housewives, etc.), introduced different types of products (intelligent mobile phones, music, etc.). 2. Mental function in the modern design, the designer will attach great importance to product affective, expelling wooden loneliness, mechanical products in the product into the vitality of life, to a certain extent, relieve mental pressure of the people. (2) that is to say, the modern product design should not only meet the basic needs of people, and want to meet

The motor vehicle industry development

Since China's reform and opening up, along with the development of Shanghai economic development, urban road traffic in providing people with convenient travel Folding electric bikes at the same time, also accept the test. Since China's accession to the WTO, Shanghai became a member of the Shanghai cooperation organization (sco), the motor vehicle industry booming, the management of motor vehicles and drivers of road traffic safety management has Three wheel bikes the primary task. But now the traffic administrative department of the still follow the old management system, vehicle management system does not keep pace with The Times, thus affecting the normal and orderly development of road traffic in Shanghai. Taking Shanghai motor vehicle management as the research object, from its historical change, the current Shanghai motor vehicle management organization system, analyzed the main problems existing in the management, analyzes the causes of the problems in developed countries as a reference and the motor vehicle management, on the basis of advanced experience, put forward the countermeasures to strengthen the management of motor vehicles in Shanghai. The thesis is divided into five chapters. The first chapter studies the significance of Shanghai motor vehicle management, vehicle management in the source position of Shanghai road traffic management, the part briefly discusses the research of motor vehicle management theory and method of public administration. The second chapter of the Shanghai motor vehicle management analysis of existing problems. Shanghai before and after the reform and opening to the outside of the historical change of the motor vehicle management review briefly, and then summarizes the status of the current management system.

lding bicycles

Folding bicycles, the choose and buy: the folding bicycles, fine observation. First observe the surface of the bicycle, the lacquer Three wheel bikes bake lacquer face whether level off, the presence of impurities and clear off color, with or without paint and obvious scratch, frame welding process is fine. Look at the car after folded, front fork, frame and fork after will rub against each other, because often fold, in case the car works. Finally from the frame shape and the coordination of the main configuration to see the vehicle quality, standing behind electric trike wheel of the frame, casing and frame after the left side of the triangle gap is uniform, Stand behind the wheel to see if the front and back on a straight line. If the two are clearly skewed on the vision, this car is definitely a problem. Frame is the most key parts of the bicycle, due to the folding part is active, therefore requires strong corresponding parts, frame should be better than ordinary bicycle to have greater strength. Relates to riding safety brakes, brake is the key to check the brake ago. After folding bicycle wheels are generally small, riding centre of gravity is moving, before the gate is too easy to roll over. See the car weight aluminum alloy material weight under 10 kilograms, the discretion of the price mainly depends on the use of the material and quality. Under 15 kg (sports) to see both the lock of folding bicycles, convenient the folding lock design, and pay special attention to when the choose and buy, otherwise difficult and time-consuming to fold is contrary to the choose and buy intention.

The advantages and disadvantages of power quality

Mountain track as a result, power quality mountain bike athletes merits a great impact on performance. This Three wheel bikes through the consult literature with his coaching experience, mountain bikes for the strength training of the players were discussed. 1 power quality and training outline quality refers to the body's neuromuscular system the ability to overcome or Folding electric bikes resistance at work. On the basis of the division of different can be divided into different categories, according to the relationship of sport-specific can be divided into general and special forces; According to the relationship of athlete's weight can be divided into absolute power and relative strength; Needed to complete the different sports activities according to the different characteristics of the power quality can be divided into the biggest power, fast strength and endurance.

A top speed of bicycles

Bicycle top speed of 268.831 kilometers, is on October 3, 1995 by the Dutch Fred roma's bell by bonner, salt flats in Utah in the United States. This Folding electric bikeswas in large part thanks to his leading vehicle produced by low pressure air pockets. And people's normal walking bike is 15 km per hour. Chrome molybdenum steel frame: 90 s, bicycle frame with chrome molybdenum steel system for the mainstream. Its distortion performance and good Three wheel bikes properties, high temperature will not affect the material, when welding the price is cheap. But the weight is heavy, easy to oxidation. Appeared to overcome its shortcomings, give play to the advantages of the new material, chrome molybdenum steel frame again. Carbon fiber frame: light and absorb the impact of the ground, quick material of backwash force, etc., is the ideal bike frame material. Carbon fiber grade, tonnage high elasticity are also higher and higher, the price is expensive. There are several kinds of methods, such as with adhesive on the mould, overlapping carbon fiber, heat treatment, solidification, molding, etc. The proportion of titanium frame, titanium is 55% lighter than steel, it is not easy to oxidation. In order to improve the tensile strength, has mixed aluminum, vanadium and titanium alloy. Such as welding needs to be done in a vacuum processing complex, frame price expensive. Aluminum frame, aluminum alloy frame of light and strong rigidity. After special processing a frame of only 1 kg in weight. Aluminum pipe tends to large diameter, to alleviate the too strong rigidity, small cars fork pipe and adopt absorb the impact of carbon fiber and other popular attention.

The purpose of the mountain bike

Mountain biking is mainly of the tread of a lower limb along the circumference of a cyclical endurance and speed endurance sports, Three wheel bikes need to have good physical quality and ideal body conditions, this requires that the coaches need based on the characteristics of the mountain bike project and some objective evaluation criteria, and combined with electric trike experience, scientifically selecting promising young athletes. At present domestic formal mountain bike race more than personal lap time trial, cross-country circle, the project is a mechanical movement, mountain bike cross-country circle more generally a longer distance, mainly on aerobic and anaerobic metabolism is complementary endurance project. According to the rules of the UCI, mountain bike race course should include the woods, fields, roads and mountain road dirt or gravel road, and have obvious climbing mountain and downhill. Course requirements each lap between 6 ~ 9 km. Off-road mountain circle is more collective endurance events, UCI Suggestions under different number of laps of the best game finish time of 90 ~ 90 min, including complete laps of road sections. Mountain bike race movement level is higher, the stronger the aerobic capacity. Aerobic metabolism ability is closely related to the function of the respiratory system, and the extent of the respiratory system developed, and the degree of the size of the body shape, muscular, mountain bike race.

The bicycle has been the most closely relationship with People's Daily life one of the means of transportation

The bicycle has been the most closely Three wheel bikes with People's Daily life one of the means of transportation. While science and technology highly developed today, there are a lot more comfortable, fast and convenient transport than bicycle, but a people-oriented of transportation Cargo bike bicycle are more and more be favorred, and become an important part of urban traffic. Thinking from a different Angle, which requires the design of the bike, to be on the basis of ergonomics, can not only emphasis on the function of the bicycle, and ease of use and entertainment at an organic whole, meet consumer needs at all levels, that bring the vibrant life personality. As a result, the man-machine analysis was carried out on the bike has the vital significance. In this paper, from the perspective of ergonomics, the development of bicycle design the human element and bicycles, bicycle design, design the man-machine relationship analysis and research. Bicycle design is discussed, and the development, from the perspective of historical evolution, combining with the characteristics of bicycle the modelling of various periods, such as structure, material, color, design elements analyses the development characteristics of bicycle appearance modelling design, predict the future trend of the development of bicycle design: bicycle will be toward miniaturization, lightweight, rich personalization and humanity, science and technology, variety and development direction, such as antique. So as to satisfy a particular population, but also embodies the pursuit of a kind of the idea of humanization and individualized.

Electric bicycle production enterprise

A kind of electric motorcycles, electric cars, is a kind of appearance is similar to the motorcycle, but in a storage battery to drive the motor drive. Driven by electric motorcycles. Divided into two wheel, electric motorcycle and electric three-wheeled motorcycle, electric motorcycle, driven by electricity, maximum design speed of 50 km/h two rounds of motorcycle. Electric motor tricycle: driven by electricity, the Folding electric bikes design speed is greater than 50 km/h, the vehicle kerb mass less than 400 kg of three-wheeled motorcycle.Electric bicycle production enterprise and national institutes, colleges and universities cooperation, system upgrading of the technological content of products, the formation of technology and products with independent intellectual property rights, continue to stay ahead in the Three wheel bikes of the techniques of electric bicycles in the world. Four national standards for electric bicycle is the most main: there must be a foot can realize human cycling; The highest design speed is not more than 20 km/h; The mass is not more than 40 kg; Motor output power is not more than 240 w.