Energy storage emergency steering module, hydraulic steering system and control method thereof

An emergency steering and steering system technology, applied in the field of engineering machinery steering systems, can solve problems such as inability to start emergency steering and potential safety hazards, and achieve the effects of solving poor emergency steering performance, improving reliability, and operating safety.

Inactive Publication Date: 2020-10-16
SANY AUTOMOBILE HOISTING MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the emergency steering system of construction machinery mostly adopts the emergency pump scheme. The power source of the emergency pump is taken from the transmission, and the transmission must be equipped with a constant mesh power take-off port; some schemes use the motor to drive the emergency pump to provide power for the steering system. However, these solutions cannot start the emergency steering when the emergency pump fails suddenly, which brings potential safety hazards

Method used

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  • Energy storage emergency steering module, hydraulic steering system and control method thereof

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Effect test

Embodiment 1

[0036] Such as figure 1 As shown, this embodiment provides an energy storage emergency steering module, which is used in the hydraulic steering system of engineering machinery (such as cranes). The hydraulic steering system includes a hydraulic pump 2, a power steering gear 3 and an angle steering gear 4. The hydraulic pump 2 is The electric hydraulic pump 2, the liquid intake end of the hydraulic pump 2 is connected with the fuel tank 1, the liquid outlet is connected with the liquid inlet port of the power steering gear 3, and the liquid return port of the power steering gear 3 is connected with the fuel tank 1 through a pipeline , to realize the oil return of the power steering gear 3. The hydraulic pump 2 is used to provide hydraulic power to the power steering gear 3 to drive the power steering gear 3 to drive the angle steering gear 4 to turn, so as to realize the steering requirements of the engineering machinery.

[0037] Such as figure 1 As shown, the energy storage...

Embodiment 2

[0050] Such as figure 1 As shown, this embodiment provides a hydraulic steering system, including a hydraulic pump 2, a power steering gear 3, and an energy storage emergency steering module according to Embodiment 1.

[0051] Since the hydraulic steering system of this embodiment includes the energy storage emergency steering module of Embodiment 1, the operation of the hydraulic steering system of this embodiment is not limited by the power take-off port of the gearbox, and the hydraulic steering system can be controlled to operate automatically, and the scope of application is wider. Wide range, safer, more convenient and reliable operation, which effectively solves the problem of poor emergency steering performance of construction machinery (especially electric drive vehicles).

Embodiment 3

[0053] This embodiment provides a control method for a hydraulic steering system, which is applied to the hydraulic steering system in Embodiment 2, see figure 1 As shown, the control method of the hydraulic steering system includes the following steps:

[0054] Judging the steering trend of the hydraulic steering system according to the detection information of the steering detection part 13;

[0055] When the hydraulic steering system has no steering tendency and the pressure of the accumulator 5 is lower than a predetermined pressure, the first control valve 7 is switched to the second control position, and the hydraulic pump 2 pumps hydraulic oil into the accumulator 5 liquid until the pressure of the accumulator 5 reaches the predetermined pressure;

[0056] When the hydraulic steering system has a steering tendency, the first control valve 7 is switched to the first control position, and the hydraulic pump 2 pumps hydraulic fluid into the power steering gear 3 to drive ...

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Abstract

The invention relates to the technical field of engineering machinery steering systems, and in particular relates to an energy storage emergency steering module, a hydraulic steering system and a control method thereof. The energy storage emergency steering module is used for the hydraulic steering system and comprises an energy accumulator, a first control valve and a second control valve. The first control position is used for being communicated with a hydraulic pump and a power steering gear of the hydraulic steering system, and a second control position is used for being communicated withthe hydraulic pump and the energy accumulator. The second control valve is used for communicating the energy accumulator with the power steering gear. The energy storage emergency steering module is additionally arranged in a traditional electric hydraulic steering system; during conventional runtime of engineering machinery, the hydraulic pump builds pressure to drive the power steering gear, thehydraulic steering system can normally operate and charge the energy accumulator of the energy storage emergency steering module; when the hydraulic pump is abnormal and cannot provide pressure, theenergy accumulator can achieve reliable auxiliary emergency steering, and therefore the problem that emergency steering cannot be achieved due to the fact that the hydraulic pump of engineering machinery is abnormal is solved.

Description

technical field [0001] The present application relates to the technical field of construction machinery steering systems, in particular to an energy storage emergency steering module, a hydraulic steering system and a control method thereof. Background technique [0002] At present, the emergency steering system of construction machinery mostly adopts the emergency pump scheme. The power source of the emergency pump is taken from the transmission, and the transmission must be equipped with a constant mesh power take-off port; some schemes use the motor to drive the emergency pump to provide power for the steering system. However, these solutions cannot start the emergency steering when the emergency pump fails suddenly, which brings potential safety hazards. Contents of the invention [0003] The purpose of the present application is to provide an energy storage emergency steering module, a hydraulic steering system and a control method thereof, so as to effectively start ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D5/30
CPCB62D5/30
Inventor 李栋升沈川何全文
Owner SANY AUTOMOBILE HOISTING MACHINERY
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