Center pin traction device

The invention provides a center pin traction device. The center pin traction device comprises a traction center pin base, a traction center pin and a protective jacket. The bottom end of the traction center pin is clamped into the traction center pin base. The protective jacket is surrounded between the bottom end of the traction center pin and the inner wall of the traction center pin base. The protective jacket is provided with at least one gap. Due to the fact that the protective jacket is provided with the at least one gap, tight connection between the traction center pin base and the protective jacket can be relieved. The problem that a nylon bush and the traction center pin base are locked can be relieved in the operational process of a locomotive, and especially when the locomotive travels in a curved mode, the problem of eccentric wear of locomotive wheel rims and the problem of locomotive vibration can be relieved. 本发明提供种中心销牵引装置，包括：牵引中心销座、牵引中心销和保护套，该牵引中心销的底端卡接在牵引中心销座中，保护套围设在牵引中心销的底端与牵引中心销座内壁之间，其中保护套上