Before the presentation, we have the structure of the correction method and the collision integral body were explained. In the history of the development of the body, the body type first appeared in the beam-type body, beam-type body is still widely used by many vehicles, such as trucks and a number of off-road vehicles. Improve the technical level from sheet metal technician point of view, to understand the structure of the body is very important, so we briefly introduce the following structure and characteristics of the beam-type body.
The history of the beam-body
FIG 1
On vehicles with beam-body, the beam-type frame (also It referred chassis) the main components of an automobile seat, an engine body and the like are fixed to the frame. Beam-type frame has a long history of use, dating back to the era of carriages and rickshaws.
The beam-type frame (FIG. 1) is usually caused by two side members made of strong, which two side members connected together by a plurality of cross bars, beams and side beams generally to 90deg ;. Despite this simple frame structure, but tough. Beam need have sufficient strength to withstand the traction force from the engine, suspension and shock from the weight of all, the beam strength and stiffness of these components and cross beams with different lateral dimensions, shape, number and material changes.
FIG. 2
Prior to the development of unibody construction, vehicles are all of the beam-body of the vehicle. Even after the development of unibody construction, trucks, buses and other heavy vehicles and some SUVs and sedans are still using beam-type body (Figure 2).
Type
The beam-type frame
Figure 3
The basic structure of a beam-type frame side member 2 and several pieces beam structure, but according to the shape thereof may be of several types (FIG. 3). Further, some types of beam-type frame comprising two side beams not or beams.
(Continued)
(Qiu Lin)