Jiayouche with widen device

The utility model relates to a jiayouche with widen device belongs to semitrailer manufacturing technical field, including the frame body, frame side member's lateral margin is provided with the channel -section steel, it widens the device to be equipped with in the cell type cavity of channel -section steel, it includes the rotation axis to widen the device, the rotary sleeve, go up backup pad and bottom suspension fagging, the rotation axis both ends are fixed respectively on the two upper and lower inner walls of the cell type cavity of channel -section steel, it is fixed with the rotary sleeve to go up backup pad and bottom suspension fagging one end, go up backup pad top and rotary sleeve top parallel and level, bottom suspension fagging bottom parallel and level bottom the rotary sleeve, be provided with spacing groove no. 1 on the below inner wall of channel -section steel, the width of spacing groove no. 1 equals with the width of bottom suspension fagging, the outside of rotation axis is provided wit