Active steering systems and hoisting machines for hoisting machines

Abstract

The invention relates to an active steering system for hoisting machinery and the hoisting machinery, wherein the hoisting machinery comprises a steering wheel (1) and wheels; the active steering system comprises an active steering device (3), a hydraulic power assisted steering device (6) and a hydraulic power assisted steering system; the active steering device (3) is arranged between the steering wheel (1) and a steering plumbing arm (7) of the hoisting machinery so as to regulate the steering transmission ratio between the steering wheel (1) and the steering plumbing arm (7) according to the running work condition of the hoisting machinery; the hydraulic power assisted steering device (6) is arranged between the steering wheel (1) and the steering plumbing arm (7) so as to control the hydraulic power assisted steering system to drive the steering directions of the wheels. In the active steering system, the hydraulic power assisted steering system is used for driving the steering directions of the wheel, so that the capability of overcoming the steering resistance is improved; the applicability to various crane underpans can be realized; the application range of the active steering system is increased.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to an active steering system for hoisting machinery and the hoisting machinery. Background technique [0002] At present, all-terrain cranes use mechanical hydraulic power steering and electro-hydraulic proportional steering system. The mechanical hydraulic power steering system is widely used in the industry because of its mature technology and strong reliability. The electro-hydraulic proportional steering system can realize multi-axis and multi-mode turn. But the existing steering system cannot solve the contradiction between low-speed flexibility and high-speed stability. [0003] Modern automobile steering technology has gone through several stages of hydraulic power steering, electric power steering, wire control steering and active steering. The active steering system has the variable transmission ratio function of the steer-by-wire steering, and retains the m...

AI Technical Summary

Problems solved by technology

[0006] In the above-mentioned eight-axle truck chassis crane and its steering control system, the fixed steering transmission ratio cannot solve the contradiction between low-speed flexibility and high-speed stability: hydraulic power assist can make the steering lighter, but in low-speed large corners, U-turn, In working conditions such as steering in a small field, it is necessary to turn the steering wheel repeatedly and greatly, resulting in poor steering flexibility and fatigue; when driving at high speeds, the rear axle lock can improve driving stability to a certain extent, but the improvement is limited. In rainy and snowy days, when turning sharply, there is still the possibility of instability; in the case of poor wheel alignment parameters, non-standard tire pressure, unbalanced suspension, etc., deviation will occur during straight driving, requiring the driver to constantly Make corrections to increase driving burden

[0007] In the above-mentioned active steering system that integrates the electric power steering function, the active steering system integrates the electric power steering function. Due to the large steering resistance of the crane chassis, the electric power steering cannot meet the system requirements, and its layout takes up a lot of space. Difficult to set up

Images