The invention relates to a structure and a method for hanging and installing a bottom suspension device of a high speed motor
train unit. The bottom suspension device is hung on a crossbeam of a
train body undercarriage, the crossbeam of the
train body undercarriage is provided with an installation part, the bottom suspension device is correspondently provided with an installation seat, the installation part is provided with a suspension hole, the installation seat is provided with an installation hole, a suspension bolt sequentially penetrates through the suspension hole in the crossbeam of the train body undercarriage and the installation hole in the bottom suspension device from top to bottom, a
gasket and a
shock absorber are sequentially arranged in the installation holes in a penetrating manner, the
gasket and the
shock absorber are sleeved on the suspension bolt, the
shock absorber is fixedly connected with the installation seat, a protection supporting plate is also sleeved on the bottom of the shock absorber, and the bottom of the protection supporting plate is fixed in a locking manner through a tightening nut. By adopting the structure and the method, under the situation that the original light-
weight train body structure is not changed, the installation of the bottom suspension device can be modified, the modification cost is low, the period is short, and the structure and the method are suitable for modifying the train from a multi-point rigid connection to the resilient structure.