Swing arm of skid steering loader

Abstract

The invention discloses a swing arm of a skid steering loader. The swing arm comprises a left arm body, a right arm body, a cross beam, an upper arm body, a lower arm body and a connecting portion, wherein the cross beam is used for connecting the left arm body and the right arm body, the left arm body and the right arm body are in the same structure and are arranged symmetrically, the connecting portion is used for connecting the upper arm body and the lower arm body, the upper arm body is formed by welding of an outer side plate and an inner side plate, the cross section of the upper arm body is in a D shape, and the inner side plate can be made of a U-shaped steel which is formed by bending of a steel plate or a proper channel steel. The D-shape cross section is adopted, manufacturing processes of the swing arm are reduced, the number of welding joints is less than that of welding joints of swing arms having rectangular cross sections which are formed by welding of four side plates, machining processes of the swing arm are easier than those of swing arms having U-shaped cross sections, and the swing arm can not be cracked easily when bent.

Description

technical field [0001] The invention relates to a boom device of a loader, in particular to a skid loader boom, which belongs to the field of engineering machinery. Background technique [0002] The skid steer loader is a loader with compact structure and flexible action. Its boom is one of the main structural parts bearing the load. The structural form of the boom determines its load bearing capacity and manufacturing difficulty. degree. At present, the boom of the skid steer loader usually adopts a rectangular section or a U-shaped section. The rectangular section is welded by four steel plates or made of section steel. It is difficult to choose in the market, and the use of section steel can only be used to make booms with equal sections, which wastes materials. U-shaped sections are generally bent from steel plates, which is difficult to manufacture and easy to crack when bent. Contents of the invention [0003] The object of the present invention is to provide a boo...

AI Technical Summary

Problems solved by technology

At present, the boom of the skid steer loader usually adopts a rectangular section or a U-shaped section. The rectangular section is welded by four steel plates or made of section steel. It is difficult to choose in the market, and the use of section steel can only be used to make booms with equal sections, which is a waste of material. U-shaped sections are usually bent from steel plates, which is difficult to manufacture and easy to crack when bent.

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