Novel friction disc limit structure

The utility model relates to a novel friction disc limit structure, this limit structure comprises friction disc body and piston, the friction disc body be equipped with spacing part, the piston on beequipped with piston anti -rotating groove. Spacing part for installing the rivet between friction disc body and piston, the rivet pass the rivet mounting hole and install in the piston anti -rotating groove who is equipped with on the piston. The beneficial effects of the utility model are that: the utility model discloses a structure of improving the friction disc is improved the parking in -process and is easily harmd the amortization piece, and the not enough problem of parking power avoids the piston to have light micro rotation's problem at the in -process that impels the friction discthrough increasing spacing part, has configuration optimization, manufacturing cost does not increase, does not satisfy the parking performance requirement, effectively reduces advantages such as parking power is not enough. 本