Milling hub transmission sealing structure for milling excavator

The utility model discloses a milling hub transmission sealing structure for a milling excavator, which belongs to the technical field of dynamic sealing of mechanical equipment, is mounted between a milling hub and a transmission shaft, and comprises an expansion combined sleeve, a movable frame, a fixed seat, a first sealing ring, a floating oil seal, a second sealing ring and a clamp spring, the expansion combined sleeve is composed of an expansion bolt, an expansion ring, an outer ring and an inner ring. Compared with the prior art, the novel sealing structure is adopted, original axial sealing is changed into end face sealing, local compression on sealing caused by radial runout of the milling hub is eliminated, the floating oil seal is adopted for the end face sealing, the sealing face of the floating oil seal can run out along with radial runout of the milling hub, and the structure has the advantages of being low in failure rate and long in service life. 本实用新型公开了一种铣挖机用铣刨毂传动密封结构，属于机械设备动密封技术领域，该密封结构安装在铣