Connecting structure of engineering mechanical chassis

Abstract

The invention discloses a connecting structure of an engineering mechanical chassis. The connecting structure comprises an H frame, a longitudinal beam, H frame bending connecting plates and an H frame horizontal connecting plate, wherein the H frame bending connecting plates and the H frame horizontal connecting plate are used for enabling the H frame and the longitudinal beam to be connected; the H frame bending connecting plates are welded to the H frame horizontal connecting plate, so that a Z-shaped structure is formed; the H frame bending connecting plates are welded under one end of the H frame; and the H frame is fixedly connected with a longitudinal beam top plate of the longitudinal beam in a vertical direction through the H frame bending connecting plates, and is fixedly connected with a longitudinal beam bottom plate of the longitudinal beam in a horizontal direction through the H frame horizontal connecting plate. According to the connecting structure disclosed by the invention, the connection of the H frame and the longitudinal beam is formed by the top surfaces and the side surfaces; a stereoscopic connecting structure is uniform in bearing, and stress concentration is not liable to exist; the structural strength of the connection is greatly enhanced, and the connecting reliability is high; under the premise that the total height of the chassis is guaranteed, an enough structural space is provided for the H frame, so that the situation that the H frame has enough structural strength is guaranteed; the structure is simple, and the connecting manner is mainly embodied by one bending plate; and the number of welding structures is reduced, so that welding cost is reduced.

Description

technical field [0001] The invention relates to a connection structure, in particular to a construction machinery chassis connection structure, which belongs to the technical field of construction machinery. Background technique [0002] At present, the construction machinery chassis, especially the crawler type construction machinery chassis, generally consists of three parts: the H frame placed in the middle for connecting the boarding vehicle and the longitudinal beams on the left and right sides used to arrange the walking system. For the chassis of large-scale construction machinery, due to its large dead weight and large lateral peripheral dimensions, it is not convenient for overall transportation, so a detachable chassis is required. [0003] In the existing detachable construction machinery chassis, the main form is that the H frame is lapped on the longitudinal beam. The H frame of this structure is completely placed on the top surface of the longitudinal beam, and...

AI Technical Summary

Problems solved by technology

Although this structure is detachable, there are the following problems: First, because the size of the H-frame structure is limited by the height of the chassis of the whole machine, its structural strength and rigidity are difficult to be guaranteed. This phenomenon is especially obvious in large-scale construction machinery

Secondly, due to this connection form, only the upper plane of the longitudinal beam and the H-frame cooperate to carry the load, the load-bearing structure is relatively simple, and it is easy to cause stress concentration at the connection part, the load-bearing capacity is limited, and the reliability and stability are not strong.

[0004] In addition to the lap connection method, there are also some construction machinery chassis where the H-frame is inserted into the longitudinal beam. This type of connection will greatly weaken the structural strength of the longitudinal beam, and the application range is limited. Where the load is severe

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