Hoist and steering control system and method of nine-shaft automobile chassis

Abstract

The invention discloses a steering control system and a steering control method of a nine-shaft automobile chassis. The system comprises a mechanical drive device, a power-assisted steering device, a hydraulic drive device and a steering control device which are used for driving wheels to steer, wherein the mechanical drive device and the power-assisted steering device drive wheels on first, second, third, fourth and fifth steering shafts to steer respectively; sixth, seventh, eighth and ninth steering shafts are provided with medium locking cylinders and steering cylinders respectively; extended ends of each medium locking cylinder and each steering cylinder are connected with a steering knuckle arm of a corresponding steering shaft to form an interlocking mechanism; and the steering control device connects or disconnects oil inlet and oil return paths of a corresponding medium locking cylinder and a corresponding steering cylinder according to a steering mode and drives wheels on a corresponding steering shaft to steer. The mechanical drive device and the hydraulic drive device drive wheels on different steering shafts to steer respectively, so that various steering modes are provided. On the basis, the invention also provides a hoist using the steering control system.

Description

technical field [0001] The invention relates to an automobile control system, in particular to a nine-axle automobile chassis crane and its steering control system and method. Background technique [0002] In recent years, with the construction and maintenance of more and more large-scale wind power and other new energy projects, as well as the demand for large-scale petrochemical and power plant construction, the super-large tonnage all-terrain crane market has achieved considerable development. [0003] As we all know, in the construction machinery industry, the all-terrain crane has the highest technical complexity factor and the most difficult one. Every time a lifting weight step is raised, the design difficulty will increase several times, such as self-disassembly of the whole machine, tower jib, single crane, etc. In many technical fields such as cylinder bolt telescopic boom, chassis multi-axle steering, etc., the design difficulty of super-large tonnage all-terrain ...

AI Technical Summary

Problems solved by technology

[0005] However, see figure 1 , the figure shows a schematic diagram of the overall structure of a nine-axle all-terrain truck crane, such as figure 1 As shown, the outriggers of the nine-axle all-terrain truck crane are arranged in an X shape, and the earrings connecting the movable outriggers to the frame are respectively arranged between the fifth and sixth steering shafts and the seventh and eighth steering shafts, limited by The space structure of the chassis, the design of the steering control system of the nine-axle car chassis is quite complicated, so the existing nine-axle car chassis crane has only one steering mode, such as figure 2 As shown, the figure shows the steering schematic diagram of the existing nine-axle all-terrain crane. In this steering mode, all the wheels on the first to fifth steering axles steer in the same direction, and the seventh to eighth steering axles The steering direction of all the wheels on the steering wheel is also the same but opposite to the steering direction of the wheels on the first to fifth steering shafts, and the wheels on the sixth steering shaft do not turn and always maintain a straight-line driving state

[0006] It can be seen that the steering control system of the existing nine-axle automobile chassis has the problems of poor curve passing ability and maneuverability, and because the tires on the sixth steering axle do not turn all the time, and the steering center of the whole vehicle is located at the sixth steering axle. The extension line of the six steering shafts, therefore, the wear of the tires on the sixth steering shaft is obviously greater than that on the other steering shafts, which is likely to cause safety hazards during the driving of the vehicle

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