Steering oil cylinder structure, steering device and electric control steering axle

Abstract

The invention provides a steering oil cylinder structure which comprises a first oil port, at least one second oil port, at least one third oil port, a piston and a piston rod, wherein the piston rod is connected to the piston; the cavity of an oil cylinder is divided into a rod cavity and a rodless cavity by the piston; the second oil port is arranged on a cylinder barrel corresponding to the rodless cavity; the third oil port is arranged on a cylinder barrel corresponding to the rod cavity; and the first oil port is arranged between the second oil port and the third oil port. The invention also provides a steering device provided with the steering oil cylinder structure and an electric control steering axle provided with the steering device. According to the steering device provided by the invention, the structure is simple, the weight of the whole vehicle is reduced, and the reliable centering function is realized.

Description

technical field [0001] The invention relates to the field of electronically controlled steering axles, in particular to a steering oil cylinder structure, a steering device and an electronically controlled steering axle. Background technique [0002] The number of axles with steering control function on a multi-axle vehicle can be a single axle or multiple axles according to the tonnage, or even all axles can be steering axles. For example, the front four axles on the famous 8-axle all-terrain crane all adopt the steering technology connected by mechanical rods, and the rear axles all realize active steering. [0003] In the early technology, the active steering rear axle used the steering control technology connected by mechanical linkages. In order to ensure the steering relationship between the axles, the design of the mechanical structural linkages was very complicated. The steering of this structure has the disadvantages of a single steering mode, a complex mechanical ...

AI Technical Summary

Problems solved by technology

[0006] In the steering system that does not use the center positioning cylinder, when the system finds an abnormality, the system can keep the steering angle of the electronically controlled steering axle that has turned a certain angle unchanged, and prompt an error, because the electronically controlled steering axle cannot return to the steering angle. Zero steering angle position, which will cause problems for subsequent driving, at which time the driver usually has to stop and wait for maintenance;

[0007] In the steering system using the center positioning oil cylinder, when the system finds an abnormality, the system can forcibly pull the electronically controlled steering axle that has turned a certain angle back to the middle position where the steering angle is 0 through the centering oil cylinder. The operator can reduce the speed of the vehicle and continue to drive the crane, but the weight and cost of the vehicle will increase due to the addition of the centering cylinder and its control device

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