Middle beam frame

Abstract

The invention relates to a middle beam frame, and aims to overcome the defects that the middle beam frame is easy to be damaged for the reasons that front and back cantilever beams of the middle beam frame in the existing loader frame system produce tensile force under the front and back action of subframes. The middle beam frame comprises a left gusset piece and a right gusset piece arranged on the left and the right sides, at least two cantilever beams are connected between the left gusset piece and the right gusset piece, and hinge joint holes are arranged in the middle of the cantilever beams. The middle beam frame is characterized in that the cantilever beams comprise at least one rear arch cantilever beam with arch top backwards and at least one front arch cantilever beam with arch top forwards. The front arch cantilever beams and the rear arch cantilever beams are provided, and the arch-shaped cantilever beams convert front and back force on the arch-shaped cantilever beams into pressure stress inside stress cantilever beams, so that structure strength-bearing capacity is improved and stability is improved; compared with straight cantilever beams made of the boards with the same thickness, the front arch cantilever beams and the rear arch cantilever beams used in the middle beam frame can reduce occurrence rate of board cracking caused by tension.

Description

technical field [0001] The invention relates to a middle frame system of a loader, in particular to a middle beam frame. Background technique [0002] Because the loader needs to have a high passing capacity, it is required that the bridge has a certain swing angle relative to the whole machine; therefore, in the current loader, the connection mode of the bridge and the frame system is a rigid fixed connection between the bridge and the sub-frame. The upper rigidly connects the middle beam frame, which is square, and has a group of cantilevered beam plates at the front and back. The connecting plate on the side is fixedly connected, and the middle part of the front suspension beam plate and the rear suspension beam plate is connected by a hinge pin. The frame, that is, the vehicle frame, rotates within a certain angle range. [0003] Due to the nature of the loader’s work, the loader frequently advances, shovels, stops, and retreats. Therefore, the middle beam frame connec...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the disadvantages that the front and rear suspension beam plates of the center beam frame in the existing loader frame system are subjected to the front and rear effects of the sub-frame and present a pulling force that causes the center beam frame to be easily damaged, and to provide a strong impact resistance, Unbreakable center beam frame

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