Round threaded screw within the fixed in the rear right side

Within the flywheel, the flywheel threaded screw fixed in the rear right side, keep the same level with sprocket, and through the chain and sprocket connected to constitute a bicycle drive system. From the structure can be divided into two types: single-stage flywheel and multilevel flywheel. Single-stage flywheel is also known as single wheel flywheel, mainly composed of coat, flat and retaining core one thousand jins, one Three wheel bikes jins, spring, washer, silk in several steel ball and other parts. The working principle of the single stage flywheel: when stepping forward move pedal, chain drive the flywheel rotation forward, while the flywheel gear and contains one thousand jins, flywheel rotating force to the core by one thousand jin, core drives the rear axle and rear wheel rotation, bicycle went forward. When to stop when the foot pedal, chain and coat are not rotating, but the rear wheels under the effect of inertia still turns forward core and one thousand pounds, while the flywheel gear produces relative sliding, thus to Cargo bike the core into the cartridge slot, one thousand kg and one thousand jins compressing the spring. When one thousand jins slide to the top of the flywheel internal tooth addendum, one thousand jins spring is compressed at most, a little bit forward slip again, one thousand jins are one thousand jins spring play, on the tooth root of "clicking" sound. Core rotate faster, one thousand jins also quickly in the flywheel gear sliding, "clicking" sound. When reverse step move down coat reverse rotation, will speed up one thousand jins of sliding, the "clicking" sound more urgent. Multilevel flywheel is an important part of bicycle transmission level flywheel is on the basis of single-stage flywheel, add a few slices of the flywheel, and in combination with the sprocket center axis, composed of a variety of different transmission ratio, which changed the speed of the bicycle.