Drilling jig for drilling of outer wallboard of forklift

Abstract

The invention provides a drilling jig for drilling of an outer wallboard of a forklift. The drilling jig comprises a drill plate. A center hole corresponding to a square mounting hole in the outer wallboard is formed in the middle of the drill plate. Drill bushing holes corresponding to threaded holes in the outer wallboard in position are formed around the center hole and sleeve drill bushings. Positioning pins are arranged on the bottom end faces of the drill plate. Bevel elastomers are arranged on one side, opposite to the positioning pins, of the drill plate. Each bevel elastomer comprises a base provided with a guide hole. The guide holes sleeve bevel mandrels movably. Springs are arranged in the bevel mandrels. The top ends of the springs penetrate the bevel mandrels to be connected with the closed ends of the guide holes. The bevel mandrels are radially fixed in the guide holes to move up and down through rotation-preventive screws. The drilling jig has the advantages that the square mounting hole in the outer wallboard is taken as a benchmark, and six-point type automatic positioning is achieved through the positioning pins and oblique positioning blocks at the lower ends of the bevel mandrels, so that stress is uniform, pit defects of a cut arc stopping point of the square mounting hole are avoided, and processing efficiency is improved.

Description

technical field [0001] The invention relates to the mechanical field, in particular to a drilling template used for drilling the outer wall of a forklift. Background technique [0002] The outer wall plate on the forklift is large in shape and heavy in weight, and its lightest weight reaches 83.1Kg, especially the outer wall plate on the heavy-duty forklift is heavier, which makes it difficult to process various threaded holes on the outer wall plate. Since the threaded holes on the outer wall plate are distributed around the 120mmX200mm installation square hole, and the installation square hole is directly cut out by flame cutting, it is affected by many factors, and the size error of the installation square hole after cutting is about ±1mm, and The cutting edge has a slope of 1-1.5°, and there are pits at the cutting arc ending point. Therefore, due to the blanking error of the installation square hole and the existence of the pit surface, the drilling template cannot b...

AI Technical Summary

Problems solved by technology

Therefore, due to the blanking error of the installation square hole and the existence of the pit surface, the drilling template cannot be directly positioned by the installation square hole, and usually uses scribe processing, but because the relative position size error of each screw hole is required to be within ±0.2mm, the scribe There are difficulties in line processing, and the random inspection often shows that the position size is within an error of 0.3-0.4mm, which seriously affects the subsequent processing

Therefore, in order to ensure the processing quality, the processing efficiency can only be reduced. Although it can meet the basic assembly requirements, it is not suitable for mass production.

In addition, due to the shape and weight of the outer wall plate, it is necessary to carry out the marking process before drilling, which is inconvenient for reciprocating transportation.

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