Come in and see what internal transmission is.

Bicycle automatic transmission (that is, internal transmission) is a new type of transmission designed and manufactured by using centrifugal and lever principles, which automatically shifts gears with the change of riding speed. The third speed ratio is1:0.71:1.1:1.4, which is suitable for people's normal riding rules, and the shift time can be adjusted according to people's preferences. The product size is designed and manufactured according to the bicycle industry standard of China, which is suitable for spokes 13G, with 36 spokes. At present, the number of flywheels produced is 1 1T, 13T, 14T, 16T, 18T, 20T, which are adjustable and fully automatic. The working principle of automatic transmission is to change the transmission ratio at will according to the change of bicycle speed, so as to achieve the purpose of saving labor and speeding up, which fundamentally replaces the manual transmission. The conversion ranges of the three gears are 0- 1 16 (rpm), 96- 120 (rpm), which is greater than 120 (rpm). Its shifting power is driven by centrifugal force generated by bicycle riding state, and the speed ratio is controlled by riding speed. Through the combination of torque input and mechanical principle, the movement driven by centrifugal force is limited, and the gear is locked to achieve the purpose of fixed gear positioning. To sum up, the performance and characteristics of automatic transmission are as follows: 1, and manual control is not required for gear shifting (cable system is cancelled). 2. This product has three gears, and the gear switching is completed automatically with the vehicle speed, without manual operation. First gear 0 ~14.5 km/h; Second gear12 ~16 km/h; The third gear is greater than15 km/h.3. You can adjust the speed change sooner or later. According to the different needs of users, you can adjust the bolts yourself to make the speed change range suitable for your riding frequency. Because the centrifugal device and spring form a system, the axial transformation of 1~3 gear is completed. Because the greater the pre-tightening force of the compression spring, the greater the centrifugal force required for shifting, and the higher the vehicle speed required to provide the required centrifugal force, and vice versa. Therefore, by adjusting the bolt and changing the pre-tightening force of the spring, the shift can be changed sooner or later. 4, suitable for all ages, the elderly like to ride some, you can ride a low-speed zone and shift gears early; Young people like to be quick, they can ride the expressway and shift gears later. As long as the pre-tightening force of the spring is adjusted, they can easily shift gears. 5, follow one's inclinations, change if you want, and stay the same if you don't want to change. When the speed reaches the speed range, the centrifugal force has been able to achieve speed change, but as long as the rider does not stop pedaling, he will not shift gears. 6, high sensitivity, because this product is mechanically driven, using the centrifugal force generated by wheel rotation and lever principle to complete the speed change, the vehicle speed determines the centrifugal force, and the centrifugal force determines the position of the spline, so the speed change is accurate and there is no worries. 7. Compact structure. In the design, each part should fulfill multiple functions as much as possible, avoid many parts and links, and improve the reliability of products. Therefore, compared with manual cable transmission device, it has simple structure and good dynamic performance. 8, wide adaptability, convenient maintenance, products are designed according to national standards and industry standards, so a large number of parts adopt national standard parts and industry standard parts, which is convenient for disassembly, maintenance and replacement of wearing parts. 9. Good sealing performance. Adopt dynamic and static sealing structures to ensure the cleanliness of products and maintain good performance with little maintenance.