Note the use of electric vehicles: a bicycle the fastening screw nut should be tightened, not loose and fall off. 2, all rotating parts should be flexible operation, may not have stuck, stay stiff phenomenon. Such as: front and rear wheels should be rotating flexible, and should not be jumping up and down and side to side, will have to stop when the front and rear wheels should do a brisk swing, not suddenly stop. Turning left handlebar should be flexible and comfortable, pedal crank shaft and should be tightened, not loose each other, and flexible rotation. 3, shift the car in the right gear speed range strain, shift position should be clear, there is not a neutral middle. 4, the chain should be elastic fit, flexible operation. Forward Reverse repeatedly shake hands crank sprocket, chain flexible operation, not a chain and jump off phenomenon. BACKGROUND electric passenger tricycle electric tricycle wide range of applications, there are elderly scooter electric three-wheeled electric tricycle cargo, there is an electric cargo tricycle with passenger electric tricycle with their kids electric three-wheeled electric tricycle cargo Which is strong, even there occupied laden electric tricycle. Electric tricycles are more open. Electric tricycle electric three-wheeled cargo business is certainly convenient, simple operation, good stability, uses much cheaper prices. When squally showers struck, totally restricted use of electric tricycle. The year will inevitably have a 2-3 month rainy season, the winter cold wind less is 3,2 months. Based on the above, some areas started on the installation of the electric tricycle electric tricycle shed to protect against the cold showers. Electric tricycle shed is currently divided into three categories: one, a simple bracket supported on an electric tricycle, stand covered with cloth advertising is abandoned, although a few can resist the cold, rough appearance of serious impact on the city's image, basic rain was shelved home, practical value is very low. 2, some opportunistic vendors use scrap metal in electric tricycle simple welded frame, only the price is quite expensive, life expectancy is only one year old. Tin shed electric tricycle electric tricycle itself adds weight, but also affect the electric tricycle mileage. 3, the use of stainless steel and polycarbonate panels electric tricycle shed, it is clear, the door is not installed on the Linyi freight wholesale electric three, which means practical value is not high. Transparent polycarbonate panels is quite low, rain or at night can not use, but also severely limit the use of electric tricycle. V electric tricycle shed above are small workshops, no mass, no size limit, so far, no one off the assembly line production of electric tricycle is the overall production and sales. Which freight electric three strong, White Dragon machinery (certified), freight electric three provided by the White Dragon Shandong Machinery Co. White Dragon Shandong Machinery Co., Ltd. (www.bailonggrp.com) Shandong Linyi, bicycles, tricycles and accessories leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In the White Dragon machinery leadership with the staff warmly welcome all inquiries negotiations to create a better future for White Dragon machinery.