What is the best bicycle Electric Bicycles

Simply speaking is both light and strong , and the performance is better . With these conditions because it folding bicycle was easy bike ride , safe and convenient . But to achieve all of the above conditions , you need good material . So, bicycle parts is often a specific factor about bike prices. The best is to be able to participate in the Olympic Electric Bicycles race bike parts . Regardless of the strength properties of the weight or the best materials are used .

Transmission What are the Electric Bikes

General use of bicycles in the city , in fact, there are many slopes in the city. For example, you can Electric folding Bikes sometimes feel the pedal cyclist suddenly sink , with your eyes can not determine the slope often more. At this point , the role of transmission can be fully reflected, if there is transmission , it can be replaced at this time as long as the lighter gear to ease the ride. Of course , the same can be used when the wind . Advantage lies in the transmission , which can help you in case of physical prowess , effectively reducing your physical exertion . For Cargo trikes example, when the cold , physical exertion is not too large, so I chose lighter than the number of teeth will be very easy if you ride when riding . When the female body as well as the poor , tired student exam , older persons can flexibly use speed bike . Therefore, the benefits of shifting the car really is too much.

Trends Electric Bikes

Due to differences in national living standards, the Electric scooters purpose of using a bike is different, in some countries the rider to travel , exercise and sports for the children's primary purpose , the general use of multi-speed cars, sport utility vehicles and mountain bikes ; bicycle in some countries primarily as a means of transport , more use of light trucks and multi-speed cars. Overall, the bike is moving in the United States , light , fast , new , inexpensive direction. Beauty is beautiful shape, colorful, ornate and impressive ; Light is light weight, riding light ; prison is high cargo bike intensity ; new is new styles, varieties ; Lim is a low cost and competitive. Chinese elderly hobby cycling has hundreds of thousands of people , they set up bike riding around the organization , you need a group for the elderly riding travel , exercise bike, now double bicycles, recumbent -style bike has been developed came out.

What speed electric vehicles and related parts

Maximum speed of the electric car depends on the rated motor speed , you can limit the output voltage to limit the output speed , can be transferred to the output terminal plus two resistor divider in the Hall , if accuracy is not required , you can also signal line plus one to two diodes ( with controller sensitivity related to the Cargo bike experimentally determined ) . How can we know the brush motor brushes changed ? Generally when the brushes wear to 1/ 3 of the time, he should be replaced, the motor does not turn bad brush Fortunately , afraid of bad is good sparks serious damage commutator segments , then more harm than good , so the motor carbon brush should be life management . With a 240 -watt motor, battery is 36V20Ah, but the car Folding electric bikes starts, the power indicator pointer will point to the lowest level , but the car is not enough power, I ask this question about where is not just with a controller on the line of ? What kind of controller like this should be used , there is no good controller is recommended . Common causes of this phenomenon in general , there are two : the line impedance is too large, there may be various circuits joints bad .

What is the lead-acid battery sulfation causes and hazards?

After the formation of lead sulfate high activity over a period of time, if there is no timely charge within this period of time, or charging is not complete, so that it does not translate into timely positive electrode active material, will again lead sulfate crystallization temperature is low, the crystalline precipitate of lead sulfate, this was repeated again and again, increasing the crystalline particles become poor conductivity, it is difficult to dissolve, when charging is difficult to recover lead sulfate crystals, known as irreversible salinization (manual refer to such alleged Electric Tricycle salinization salinization). There are many, such as an electrode grid corrosion fatal, severe deformation of the grid electrode, the electrode active material falling off, the battery internal short circuit or battery failure CAUSE Electric folding Bikes physicochemical, however, statistics show that battery failure majority are by the electrode active material caused irreversible sulfation.

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 .

Three wheel bikes

The controller is to control the motor speed component is the core of electric vehicles electrical system with voltage , Cargo bike limiting or Folding electric bikes protection. Intelligent controller also has a variety of riding modes and vehicle electrical components self-test function . Electric vehicle energy management controller and various control signal processing core member .

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 .

Theoretical studies designed electric tricycle

Fuel locomotive environmental pollution caused by increasing the electric tricycle as a cost-effective , low maintenance operating costs , flexible and convenient means of transport Folding electric bikes. Which the status of the use of low -frequency electric tricycle is an important driver of the troubled township , single-purpose electric tricycle often ends after use is often long idle . Discussion and research on this situation unfolding is necessary, which is often multi-functional electric tricycle talk Cargo bike the topic. However , theoretical studies of electric tricycle design is still in the primary level in design innovation and practice , there are still a large number of urgent problems . This paper analyzes the generation of electric tricycle , the development of the internal conditions and external causes, and from the perspective of the actual use of electric tricycle behavior , proposed township electric tricycle with innovative design strategies .

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.

Italy Electric scooters market

Italy 's heavy industry , light industry , tourism is highly developed , of course, a motorcycle is Folding electric bikes well developed. However, due to educational level and taste of our people has been in a low state, so many European brands are not perceived American people . The other is the multi- Italy by SMEs , to plant for small manufacturers to determine the brand of people who , to their knowledge is certainly very small. 1946 film " Roman Holiday" swept the world in which romantic love story infect everyone, spread so far. Hepburn scooter bike while driving is Piaggio VESPA from Italy , also known as the only士帕or wasp , the car does not like the Japanese motorcycle pedal plastic shell , but the whole steel frame repression , so durable high degree . 1940s , VESPA 50 years can be seen. Currently has 50 million worldwide sales . India 3 million , Vietnam 1 million , while China is less than 10 . And the country is currently Piaggio Zongshen cooperation. Now Cargo bike has acquired most of the European motorcycle manufacturers , namely Apulia, Spain Derby, Ji Leila , AIDS and so many ancient brands . Most of the French flag motorcycle parts are almost always Piaggio . Ducati motorcycles in luxury, but not a bad opening Ducati said. Malaguti , both heavy locomotives, quality and quality can Agusta below par . MV Agusta , nicknamed motorcycle Lamborghini, two Ferraris , current and Lifan cooperation. Bombardier , the car did not see Spider-Man , that is Bombardier . Italian riding the Czech Republic, and produced full plate as Piaggio scooters . Another is the production of helicopters Agusta , Piaggio and Bombardier is the production of private aircraft. Italian motorcycle brand still many, and Japanese motorcycle is different, the Italian motorcycle is better, durable, not easily broken , perfect design , as opposed to just imitate , assembled ( little Japanese motorcycle design , assembly of many ) marketing Japanese motorcycle , the Italian motorcycle if people want to know , just step up publicity efforts to gain a foothold . Of course , the Italian motorcycle is the most threatening of the Japanese motorcycle trader .

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

Multi-function folding bicycles design research and discussion

Multi-function folding bicycles design research and discussion
Multi-function folding bicycle design background and significance of the bike as a short walking and leisure tools is irreplaceable by other means of transport. But urban development lead to traffic congestion, vehicle storage area is insufficient, lack of bicycle parking places and stolen phenomenon is very serious situation, pressing for bicycle take up less space, easy to carry. The emergence of folding bicycles, better solve the above problems. The current folding bicycles, folding main electric trike is to reduce the occupied space, function is relatively single, not through simple changes with other functions; At the same time around the folded way of folding, folding after modelling is generally quite rough, like a scrap of bike, its outstanding, bones and muscles exposed edges and corners, no folding locking device, can't Cargo bike independently and stand down. To make up for the above defects, this paper designs a new type of multifunctional folding bicycles. The folding bikes "four with a car", in addition to general bicycles instead of walking or fitness function, but also as a shopping cart, after the folding luggage trailer and seat use, unifying the cycling, shopping, transportation and rest. 2 folding bicycles, folding folding scheme analysis scheme is the core issue of folding bike design.

Mountain bike (English for Mountain B Ike, MTB)

Mountain bike (English for Mountain B Ike, MTB), in order to free to roam in the hills, it has a bike stronger than normal, the frame, light outgoing trucks, it is not enough, must also have a flexible and powerful drive system. Along with the advance of human society, accelerating the pace of life, make people eager to return to nature release accumulated for a long time of oppression, and such problems as environment pollution, electric trike shortages, traffic congestion becoming more serious, the global bicycle industry development momentum, particularly aesthetically pleasing, functional diversity of mountain bike is more popular. A 1, the research object, research objects and methods in chongqing, chongqing yongchuan N km on the bullet, chongqing hard stone, chongqing jiangbei sky, the quick feet five mountain bike club as the research object. Investigation content of chongqing's Folding electric bikes bike club, facilities, sports level, investigate the source of funds, etc. , three research methods, literature review related general situation of the literature, events, and mountain bike movement, etc.; Through the Internet and telephone for mountain bike club executives asked interview. Second, the results and the analysis of the number of mountain bike status quo in chongqing mountain bike club. Chongqing mountain bike club so far a total of seven.

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.