Design method of comfortable off-highway dump truck

Abstract

The invention relates to a design method of a comfortable off-highway dump truck, which is characterized in that a power system of the dump truck is connected to a main truck frame; a steering system is connected to the outer side on left side in front of the main truck frame; a suspension system is connected below the main truck frame; a brake system is connected to the inner side and the outer side of the main truck frame; a hydraulic cylinder of a lifting system is connected on the front end of a sub-frame and a front plate of a packing case through a cylinder connecting seat; the packing case is connected to the sub-frame; the sub-frame is connected to the main truck frame through a bracket and a connecting plate; a driving cab is unilaterally arranged at on left side in front of the main truck frame; the suspension system is an equalizing-suspension device; and an equalizing-suspension frame leaf spring is formed by connecting a main leaf spring and an auxiliary leaf spring. The invention defines the market of off-highway trucks, determines the technical index of the off-highway trucks according to the determined market demands, completes the design of the overall layout according to the requirement of the technical index at the same time and mainly solves the problem of the truck ground system in the off-highway state.

Description

technical field [0001] The invention relates to a dump truck used in off-highway working conditions, in particular to a comfortable off-highway dump truck capable of exerting high transport efficiency in short-distance transition transportation of various open-air mineral materials under off-highway working conditions design method. Background technique [0002] At present, for the specific market of bulk material transportation in domestic water conservancy and electric power construction sites, large-scale open-pit mines and other similar places, the construction site is relatively closed, the construction period is long, the transport materials are relatively stable, and the vehicles are heavily used and updated quickly. Mining vehicles in the engineering category are more suitable, but because of their high purchase and operating costs, project contractors purchase a small amount for qualification certification for bidding needs, and they are rarely used in practice; eng...

AI Technical Summary

Problems solved by technology

When this kind of vehicle is used on the construction site, due to the poor road conditions on the construction site, the softness and hardness of the road surface on which the vehicle is driving, the large resistance coefficient of the surface road, the high working intensity and severe overloading, the upper thrust rod often breaks, which causes long-term drive axles to move, mid The drive shaft of the rear axle is damaged, and the distribution of the suspension thrust rods cannot meet the requirements of the construction site.

[0006] 4. The traditional balance suspension is a single-leaf spring structure, that is, the middle of the leaf spring is fixed on a balance shaft

The existing problems are loud noise, heavy weight, and poor economical performance of the vehicle

[0008] 6. The traditional connection method of the oil cylinder for engineering vehicles is to directly connect the brackets at both ends of the oil cylinder to the front plate of the cargo box. This connection method has three disadvantages: 1. Drill 12 φ16.5 holes on the front plate of the cargo box. Holes, due to the heavy weight and large area of ​​the front plate of the cargo box, it is very inconvenient to process. Second, because the front plate of the cargo box is easily deformed when the cargo box is loaded, this will directly lead to changes in the installation position of the oil cylinder, making the oil cylinder The service life of the oil cylinder is reduced due to the additional force; third, because the bolts are directly connected to the front plate of the cargo box, the bolt heads are exposed inside the cargo box, and it is difficult to disassemble after being deformed or corroded by the impact of the cargo, which is not convenient for the oil cylinder Repair and replacement

[0009] 7. A large number of working condition surveys show that for the stripping of open-pit coal mines or the mining of metal ores, the materials loaded in the container can reach more than 50 tons at a time. During the lifting and unloading process of the container, the hinge seat is turned over The impact force of the device is large. If the strength is not enough or the structure is unreasonable, it is easy to cause cracks in the turning hinge seat or the gap increases, causing the cargo box to move left and right, so it will damage the lifting cylinder or cause a rollover accident.

[0012] 10. In the rear suspension of traditional engineering vehicles, there are two types of leaf spring skateboard seats. One is a frame structure, which can be self-limiting in the balanced suspension and when the rear axle jumps, but the upper plane is a plane, and at the same time There is no oil groove on the lower arc surface; the other is a sickle structure, and the upper plane is a plane, which cannot be self-limiting when the middle and rear axles jump

Due to the off-highway working conditions, the road surface of the vehicle is an engineering sidewalk, the road condition is poor, the road surface is uneven, and the axle jumps are large and frequent, so the traditional two structures of the leaf spring skateboard seat are used in off-highway working conditions. When the upper plane of the leaf spring seat comes into contact with the leaf spring wire and is impacted when the axle jumps down to the self-limiting position, the pressure on the leaf spring increases, and there is no oil groove on the lower plane. The spring slide seat is worn out, and the top is impacted, and the longest piece is easy to break when used on the construction site

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