Main jib structure for fork installing machine

Abstract

The invention discloses a main jib structure for a fork installing machine and belongs to main jib structures of engineering machinery. The upper cover plate of a main jib is welded at the inner side of a U-shaped main jib plate to form a high-strength box structure; second shaft sleeves are respectively welded on the two sides of the rear surface of the wallboard of the U-shaped main jib plate; a bend cover plate is welded on one side of the rear surface of the wallboard of the U-shaped main jib plate; a crescent plate is welded on the rear surface of a main shaft sleeve at the upper face ofthe wallboard of the U-shaped main jib plate; a rear web plate, a rear inner web plate and a forth shaft sleeve are respectively welded on one side of the rear surface of the wallboard of the U-shaped main jib plate; cylinder support plates are symmetrically welded on a left web plate and a right web plate; third shaft sleeves are welded on the left web plate and the right web plate; and a front lower rib plate is welded in the middle of a front plate at the lower part of the front end of the U-shaped main jib plate. The main jib structure of the fork installing machine has the advantages that the U-shaped main jib plate and the upper cover plate are combined to greatly reduce welding lines; each web plate is in a curved shape combined with jib rest stress distribution, thus effectively ensuring the stress of the main jib structure to be more uniform and improving the integral strength; and the bearing capability is strong, the structure is concise and the weight is light.

Description

technical field [0001] The invention relates to a main arm structure of construction machinery, in particular to a forklift main arm structure. Background technique [0002] The forklift is a multi-purpose lifting and handling equipment, which combines stability and high work efficiency, and is suitable for a variety of material handling environments. The forklift has its unique structure. The front end is the working device. The working device includes the main arm, the telescopic boom (included in the main arm) and the floating fork. In the lifting operation, the main boom is mainly used to bear the gravity generated by the entire telescopic boom, forks and loads. At present, the main arm structure of the forklift machine generally adopts four pieces of plate tailor-welded to form a standard quadrilateral structure. Due to the unreasonable design structure, there are many butt welds, and the welding stress is not easy to release. The force uniformity is not good, resulti...

AI Technical Summary

Problems solved by technology

At present, the main arm structure of the forklift machine generally adopts four pieces of plate tailor-welded to form a standard quadrilateral structure. Due to the unreasonable design structure, there are many butt welds, and the welding stress is not easy to release. The force uniformity is not good, resulting in adverse effects such as short service life and cracking of the main arm

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