Forklift outer door frame structure improvements

Off road forklifts job, always long and high-frequency withstand large loads, so the strength of the door frame assembly in particular played a key role in demanding the outer door frame.

1. The general structure of the outer door frame assembly

General assembly of the outer door frame structure shown in Figure 1. Square box structure is more complex, the back door frame assembly welding deformation of large, need to eliminate welding stress and secondary correction. The beams 1 and 3 under the crossbar processing complex, the production process is longer, and the need mold manufacturing, higher production costs, especially in the size of a beam sack difficult to guarantee in the actual production, the need to correct the processing is completed. To this end, the decision on the original outer door frame general improvements.

Figure 1

2. The new structure of the outer door frame assembly

New outer mast assembly structure shown in Figure 2. Square box structure is relatively simple, the door frame assembly of welding deformation is small, proper control can meet the requirements, no correction, and when the sack is easy to control the size of the beams b actual production.

Common type gantry tilt between the cylinder bearing seat and Huff vertical distance 450 mm, the new outer door frame relatively common type of outer door frame its Hough seat down, tilt between the cylinder bearing and bearing Huff vertical distance of 600 mm, and therefore the new mast in front, after tilting mast outside force state significantly improved.

Figure 2

3. Two outer door frame intensity contrast

After High Mast Diesel Forklift computer simulation experiments, the two kinds of the outer door frame assembly structural strength comparison, the maximum displacement of the results outside the ordinary type gantry 11.17 mm, the new maximum displacement of the outer door frame 11.9 mm. Although the increase in the new slight deformation of the outer door frame in the same conditions, but little difference between the amount of deformation that can meet a variety of conditions.

After CAE computer simulation experiments, the two kinds of the outer door frame beams in structural strength were compared. After loading under the same conditions, the stress state of the ordinary type outer door frame beams is poor, the maximum stress is 144 MPa; force status of new outer door frame beams Welded structure better, maximum stress is 113 MPa.

Seen from the above, the new structure of the outer door frame assembly is simple, less quality, optimized processing components, while higher productivity, at the same stress conditions can replace common type outer door frame assembly to use.