Fixing device on automobile auxiliary frame

The invention discloses a fixing device on an automobile auxiliary frame. The fixing device comprises the auxiliary frame. Through holes are formed in the auxiliary frame. Each nut is arranged at oneend of a bolt. Nut boxes are arranged on the outer sides of the nuts and fix the nuts. All parts on the auxiliary frame are fixed through the bolts. Through the arrangement of the nut boxes, the nutsmove in a small range in the nut boxes to release the tolerance, the requirement for machining accuracy is reduced, and therefore manufacturing cost is reduced. 本发明公开了种汽车副车架上的固定装置，包括有副车架，在所述副车架上开设有通孔，所述螺栓的端上设置有螺母，并在所述螺母的外侧设置有螺母盒，由所述螺母盒固定住螺母，通过螺栓来将副车架上的各零件进行固定；通过设置有螺母盒，使得螺母在螺母盒中的小范围移动来释放公差，降低加工精度的要求，进而降低制造成本。