Lift cylinder support for electric drive mining dump truck

Abstract

The invention discloses a lift cylinder support for an electric drive mining dump truck. The lift cylinder support comprises two lifting bases which are formed in a casting mode. An inner cavity is formed in one end of each lifting base, and the other end of each lifting base is a circular ring end capable of being welded to a steel pipe. A boss is machined in each inner cavity. Through and coaxial pin shaft holes are machined in the side wall of each inner cavity and the corresponding boss. Pin shafts penetrate into the pin shaft holes of each lifting base and a bearing in the cylinder head of a lift cylinder in the corresponding inner cavity, and thus two lift cylinders are correspondingly connected with the two lifting bases. The outer wall of each inner cavity is welded to a threaded base. One end of the outside of each pin shaft is provided with a baffle, and each baffle is provided with a U-shaped opening capable of being buckled on the corresponding threaded base. The left lifting base and the right lifting base are each subject to monoblock casting and are in arc smooth transition, so that structure mutation and stress concentration are prevented, and the anti-fatigue characteristic of a frame is improved. The left lifting base and the right lifting base are connected through the steel pipe, and thus the stress condition is improved. Moreover, the left lifting base and the right lifting base form an enclosed structure together with a frame lengthwise beam, and hence the torsional performance of the entire frame is improved. The cylinders and the pin shafts can be mounted and dismounted more conveniently.

Description

technical field [0001] The invention relates to a support structure and a connection structure of a lifting oil cylinder of an electric transmission mining dump truck, and belongs to the technical field of dump truck frames. Background technique [0002] Mining dump truck is the key equipment in open-pit mining and large-scale earthwork construction. It is a professional equipment used for ore or earthwork transportation. It has the characteristics of heavy load and high work efficiency. At present, mining dump trucks have a trend of becoming large and gigantic, and the requirements for the strength of the load-bearing structure of mining dump trucks are becoming more and more stringent. The frame of the mining dump truck is used as the base of the whole vehicle, and the loads of other components and goods are applied to the frame, causing the frame to bear the effects of gravity, impact load, torsional load and alternating load at the same time, so the frame is required It...

AI Technical Summary

Problems solved by technology

The main structure of the existing mining dump truck lifting cylinder support is as follows: figure 1 As shown, in this structure, firstly, a pin hole is set on the oil cylinder support 10, and the cantilever pin 11 is placed in the pin hole through interference fit, and welding is performed at the joint between the pin 11 and the pin hole, and the pin The shaft 11 and the oil cylinder support 10 are in an over-constrained state through interference fit and welding and fixing at the same time, and the probability of cracking at the weld is high; the pin shaft 11 is a cantilever beam structure, which is prone to stress concentration during work

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