mine dump truck

Abstract

The invention belongs to the field of vehicle manufacture and particularly relates to a mineral dumper which comprises a frame, a rear axle and a container. A coaming of the container is strengthened by a quadrilateral framework main beam and a quadrilateral framework auxiliary beam. Two ends of two lifting oil cylinders are respectively supported on the frame and the front portion of the container. Two bottom support bases of a container rear beam, the frame and a rear overhang are connected to form two points, and the frame and the container are integrally connected through the two connection points. In addition, an oscillating shaft single longitudinal arm structure and a single longitudinal arm independent suspension of a double-lug hydro-pneumatic spring are adopted. The mineral dumper has the advantages that a force transmission path of load is optimized, the load is borne by the frame and the container together and is directly transmitted to the ground, the frame only bears small pressure and is designed to be light in weight, self-weight of the whole dumper is reduced, unladen mass utilization coefficient is high, oil consumption rate of the dumper is reduced, and manufacture cost and operation cost of the mineral dumper are reduced.

Description

technical field [0001] The invention belongs to the field of vehicle manufacturing, and in particular relates to a mining dump truck, which is suitable for mine earthwork, ore transportation, construction fields such as roads and railways, and material transportation in non-road transportation fields. Background technique [0002] At present, mining dump trucks mainly include power system, frame, front axle, rear axle, hydraulic system, electric drive system, cab, cargo box, vehicle management control system and auxiliary systems. The front axle is steered, and the rear axle is driven mechanically or by electric motor. The rear axle generally adopts a rigid bridge structure, and the four rear wheels are divided into two groups and distributed on both sides of the frame, and two motors are used to drive the two groups of rear wheels respectively. The rear axle, the rear support of the cargo box, and the frame are connected together as a rotating shaft during lifting. The lif...

AI Technical Summary

Problems solved by technology

[0003] But at the same time, the above mine dump truck also has the following disadvantages: the load bearing mode of the mine dump truck is that all the load and the weight of the cargo box act on the upper plane of the frame, which is transmitted to the tires by the frame, and then transmitted To the ground, the frame needs to carry all the load and the weight of the cargo compartment during the entire transportation process, so the frame needs to be rigid and strong enough to bear the pressure, so the frame has to be made particularly strong and heavy; at the same time, in some Under special working conditions, the local position will bear the pressure brought by the weight of the entire cargo, and this position has to be designed more robustly. For example, when dumping, the weight of the cargo plus the weight of the container is all concentrated on the lifting of the frame Therefore, the lifting position of the frame generally adopts a cast steel frame. As the frame is made stronger and heavier, the manufacturing cost of the mining vehicle is greatly increased.

The heavy frame will inevitably increase the weight of the mining vehicle itself. Since the weight of the mining vehicle consumes a considerable part of fuel no matter in the process of driving with no load or full load, the heavier the weight of the mining vehicle, the more The fuel economy of the vehicle is poor, and the operating cost of the mining vehicle is high

The weight of the mining vehicle is heavy, and the utilization factor of the curb weight is low. Under the same cargo capacity, the diameter of the tire used is large, and the center of mass of the vehicle is high, which brings the risks of high tire cost and poor safety performance of the mining vehicle.

The rigid bridge structure is that the wheels of the vehicle are connected by an integral axle (rigid shaft). The wheels together with the axle are supported under the frame (or body) by elastic suspension. The disadvantage is that the truck frame is narrow and the suspension has to It is very strong; it has very high requirements on tires and road conditions, and obstacles on the road are a huge challenge to tires. The tires that pass over obstacles will bear double the load, while the loads on the connected tires are almost zero. The load distribution of other tire groups will also be affected; the different diameters of each tire will also affect the uneven load distribution of the tires; due to the narrow frame, the frame bears a very high moment from the side load, and when cornering The load on the outermost tire will increase significantly. The above shortcomings will greatly increase the damage rate of the tire and increase the maintenance cost.

In short, the curb quality utilization factor of mining dump trucks is low, resulting in high vehicle manufacturing, operation and maintenance costs, and poor economical use

Images