But speed limit skidding device with guarantee children safety

The utility model provides a but speed limit skidding device with guarantee children safety, includes wheel seat, speed limit wheel, lid, helicoidal, spring leaf, brake block slow down, a serial communication port, be provided with gyro wheel and speed limit wheel below the wheel seat, one side of speed limit wheel is provided with the speed reduction dish, the lid that slows down is provided withthe inner chamber, and the spring position fixing nail passes the spring leaf locating hole and fixes the one end of spring leaf in the inner chamber, be provided with the brake block on the other end of spring leaf, the rivet passes to slow down and cover the locating hole and will slow down and approximately fix the side at the wheel seat, the helicoidal is fixed and is covered in the speed reduction, and the butterfly bolt rotation when butterfly bolt's bolt head withstands the spring leaf, continues rotatory butterfly bolt in can getting into the helicoidal, and the brake block that can promote to fix on the spri