Steering wheel assembly for motor vehicle and assembly method and structural assembly of steering wheel assembly

The invention relates to a steering wheel assembly for a motor vehicle and an assembly method and structural assembly of the steering wheel assembly. The structural assembly comprises a press-ring mechanism (3) and an air bag (2). The press-ring mechanism includes a first part (32), a second part (31) moving relative to the first part and a spring element (33), wherein the spring force of the spring element separates the first part and the second part from each other. The second part can occupy an initial position and a pressing position, wherein the press-ring mechanism can switch on an automobile horn at the pressing position. The first part (32) is used for direct mechanical connection with a steering wheel skeleton (11). A housing of the air bag is directly mechanically connected to the second part (31) and is not directly mechanically connected with the steering wheel skeleton (11). Therefore, the assembly friendliness of the structural assembly in the steering wheel assembly canbe realized, and the risk