The utility model provides a flywheel adds unlocking device and has its flywheel assembly, wherein, the flywheel adds unlocking device for fixed flywheel, include: fixing sleeve, fixing sleeve pass the shell of flywheel to with the shell of flywheel fixed connection hermetcally, ejector pin, ejector pin are worn to establish in fixing sleeve, and the first end of ejector pin passes fixing sleeve and pushes up second end position in the outer end of the shell of flywheel to, ejector pin mutually with the flywheel. The technical scheme of the utility model it rocks under the exogenic action easily when warehousing and transportation and receives the problem of destruction to have solved the flywheel among the prior art effectively.