Portable detachable pulley

A portable detachable pulley, comprising a gasket, wherein

• a buckle assembly is provided on a lower end face of the gasket;
• the buckle assembly comprising two first buckles that are symmetrically arranged and fixedly mounted on the lower end face of the gasket;
• a second buckle being provided between the two first buckles and located at one end portion of one side of the two first buckles, with a fastening component provided at another end portion of the two first buckles;
• a connecting piece being movably assembled between the two first buckles, with a pulley assembly for rolling being provided beneath the connecting piece;
• the pulley assembly comprises a fixing seat fixedly arranged at a bottom of the connecting piece, and a first connecting column rotatably embedded at a bottom of the fixing seat;
• a pulley housing being fixedly assembled on an end face of the first connecting column away from the fixing seat, and a center plate being fixedly arranged inside the pulley housing;
• a rotating shaft being rotatably inserted in the center plate, and the rotating shaft and the pulley housing being coaxially arranged;
• both ends of the rotating shaft being fixedly sleeved with a roller body, respectively, and a brake member being arranged between the pulley housing and the rotating shaft.