An emergency steering system for a loader

Abstract

The utility model relates to a loader emergency steering system relates to engineering machinery technical field, including emergency unit, liquid filling valve, check valve, high pressure energy accumulator, flow amplification valve and hydraulic pipe, liquid filling valve connects high pressure energy accumulator and emergency unit through hydraulic pipe, and the oil outlet of high pressure energy accumulator and emergency unit is connected flow amplification valve through check valve, and flow amplification valve connects steering mechanism, and this system can be more reliable to realize steering under emergency.

Description

Technical Field

[0001] This utility model relates to the field of chemical machinery manufacturing, specifically to an emergency steering system for loaders. Background Technology

[0002] The statements herein provide only background information related to this invention and do not necessarily constitute prior art.

[0003] Loaders frequently turn during engineering operations. Their conventional steering systems rely on the main hydraulic pump driven by the engine for power. If the engine fails or the main hydraulic system malfunctions, the steering function will be affected, which may lead to loss of control of the equipment and cause safety accidents. Therefore, the emergency steering system is crucial for the safe operation of loaders.

[0004] Existing emergency steering systems for loaders mostly adopt a single accumulator scheme, which mainly consists of an accumulator, a simple control valve, and connecting pipelines. The accumulator stores hydraulic energy in advance. When the main system fails, the control valve opens, and the accumulator releases hydraulic oil to the steering mechanism to achieve emergency steering. However, this type of system has limited accumulator capacity, which is difficult to meet the emergency steering needs under long-term or complex working conditions, and the charging speed is slow, affecting the next emergency use. Utility Model Content

[0005] The purpose of this invention is to provide an emergency steering system for loaders that can at least solve one of the aforementioned technical problems.

[0006] To achieve the above objectives, this utility model proposes an emergency steering system for a loader, comprising an emergency unit, a filling valve, a check valve, a high-pressure accumulator, a flow amplification valve, and a hydraulic pipe. The filling valve is connected to the high-pressure accumulator and the emergency unit via the hydraulic pipe. The oil outlets of the high-pressure accumulator and the emergency unit are connected to the flow amplification valve via the check valve. The flow amplification valve is connected to the steering mechanism.

[0007] Further configured, the emergency unit includes a three-position seven-way directional valve.

[0008] Further configuration: the end of the three-position seven-way directional valve is connected to a two-position three-way solenoid valve.

[0009] A further configuration involves installing a throttle valve between the end of the three-position seven-way directional valve and the two-position three-way solenoid valve.

[0010] Further configuration involves connecting the end of the throttle valve to the return oil line.

[0011] Further configuration: The emergency unit is connected to the return oil line of the working oil pump via a hydraulic pipe.

[0012] Further configuration involves connecting the end of the filling valve to the parking brake valve assembly.

[0013] Further configuration involves installing hydraulic pipes at the oil inlet ends of the high-voltage accumulator and emergency unit.

[0014] Further configuration involves connecting the oil inlet of the high-voltage accumulator and the emergency unit to the pump via hydraulic pipes.

[0015] Further configuration involves pairing high-voltage accumulators.

[0016] The beneficial effects of one or more of the above technical solutions: By combining an emergency unit and a high-pressure accumulator, compared to a single accumulator solution, the emergency power reserve is increased, meeting the emergency steering needs under more complex operating conditions. The inclusion of a charging valve and a check valve makes accumulator charging more efficient and prevents oil backflow, ensuring the stability of the power supply. The design of the return oil line in the working oil pump system helps maintain system pressure and oil circulation, improving system reliability and durability. Therefore, this system can reliably achieve steering in emergencies, reducing safety risks. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute a limitation thereof.

[0018] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model; Figure 2 This is a partial structural schematic diagram of Embodiment 1 of the present utility model.

[0019] In the diagram, 1 is the emergency unit; 2 is the filling valve; 3 is the check valve; 4 is the high-pressure accumulator; 5 is the flow amplification valve; and 6 is the hydraulic pipe. Detailed Implementation

[0020] The specific implementation of this embodiment will now be described with reference to the accompanying drawings.

[0021] Reference Figure 1 and Figure 2 This utility model proposes an emergency steering system for a loader, including an emergency unit 1, a filling valve 2, a check valve 3, a high-pressure accumulator 4, a flow amplification valve 5, and a hydraulic pipe 6. The filling valve 2 is connected to the high-pressure accumulator 4 and the emergency unit 1 through the hydraulic pipe 6. The oil outlets of the high-pressure accumulator 4 and the emergency unit 1 are connected to the flow amplification valve 5 through the check valve 3. The flow amplification valve 5 is connected to the steering mechanism.

[0022] Emergency unit 1 includes a three-position seven-way directional valve, with a two-position three-way solenoid valve connected to its end. The two-position three-way solenoid valve has a fast response time, enabling it to complete opening and closing actions quickly, making it suitable for situations requiring rapid steering.

[0023] A throttle valve is installed between the three-position seven-way directional valve and the two-position three-way solenoid valve. The three-position seven-way directional valve efficiently recovers the potential energy of the external potentiometer by changing the oil path of the drive cylinder of the external potentiometer, and through a regenerative energy recovery method using differential interconnection between the two oil chambers of the drive cylinder, thus ensuring the reliability of the device's operation.

[0024] The throttle valve is connected to the return oil line at the end. The throttle valve adjusts the flow rate of fluid or gas by changing the degree of valve opening, thereby controlling system parameters such as system pressure, temperature, and flow rate.

[0025] Emergency Unit 1 is connected to the working oil pump return line via hydraulic pipe 6. The end of the filling valve 2 is connected to the parking brake valve group. The return line is connected to the entire system, which helps to maintain the system's oil circulation and pressure stability.

[0026] Hydraulic pipes 6 are installed at the oil inlet ends of the high-pressure accumulator 4 and the emergency unit 1, through which hydraulic oil is input.

[0027] The oil inlet of the high-pressure accumulator 4 and the emergency unit 1 is connected to the pump through the hydraulic pipe 6, and the pump provides hydraulic oil to the system.

[0028] High-voltage accumulators 4 are arranged in pairs, with the high-voltage accumulators 4 arranged side by side on both sides of the frame. The capacity of the high-voltage accumulators 4 is increased by increasing the number of them.

[0029] The working principle is as follows: Under normal operating conditions, the pump continuously operates, outputting hydraulic oil. The hydraulic oil is delivered through hydraulic lines 6, with a portion passing through check valve 3 to provide pressurized oil to the steering system, meeting normal steering requirements. The return line of the working oil pump system returns used oil to the oil tank and other components for circulation. At this time, the filling valve 2 may be in a state of maintaining stable system pressure or replenishing hydraulic oil. The flow amplification valve 5 adjusts the flow rate of oil entering the steering system according to operating commands to meet different steering operation requirements.

[0030] In an emergency, when the main pump malfunctions and cannot supply oil normally, emergency unit 1 is activated. High-pressure accumulator 4, acting as an emergency energy source, releases stored high-pressure hydraulic oil. The hydraulic oil flows through hydraulic lines 6, passes through check valve 3 to prevent backflow, and then has its flow rate regulated by flow amplifier valve 5 before entering the steering system to provide the necessary hydraulic power for steering operations, enabling emergency steering. The parking brake valve assembly works in conjunction with vehicle braking and other operations to ensure braking safety during steering and other maneuvers. At this time, filling valve 2 may stop its regular filling operation to avoid interfering with the emergency oil circuit and ensure the normal operation of the emergency steering system.

[0031] Terminals A and B are typically connected to actuators, such as hydraulic cylinders or hydraulic motors. By switching the directional valve, oil is alternately supplied and returned to terminals A and B, thereby controlling the extension, rotation, and other movements of the actuators.

[0032] Among them, end b: may be the control oil port of the directional valve or related to the pilot control oil circuit, used to receive pilot pressure oil to control the valve core of the directional valve to switch positions and realize the oil circuit switching.

[0033] Among them, T end: represents the return oil pipeline, through which the hydraulic oil after working in the system flows back to the oil tank.

[0034] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.

Claims

1. An emergency steering system for a loader, characterized in that, It includes an emergency unit, a filling valve, a check valve, a high-pressure accumulator, a flow amplification valve, and hydraulic pipes. The filling valve is connected to the high-pressure accumulator and the emergency unit through the hydraulic pipes. The oil outlets of the high-pressure accumulator and the emergency unit are connected to the flow amplification valve through the check valve. The flow amplification valve is connected to the steering mechanism.

2. The loader emergency steering system according to claim 1, characterized in that, The emergency unit includes a three-position seven-way reversing valve.

3. The loader emergency steering system according to claim 2, characterized in that, The three-position seven-way reversing valve is connected to a two-position three-way solenoid valve at its end.

4. The loader emergency steering system according to claim 3, characterized in that, A throttle valve is installed between the end of the three-position seven-way reversing valve and the two-position three-way solenoid valve.

5. The loader emergency steering system according to claim 1, characterized in that, The end of the throttle valve is connected to the return oil line.

6. The loader emergency steering system according to claim 1, characterized in that, The emergency unit is connected to the return oil line of the working oil pump via a hydraulic pipe.

7. The loader emergency steering system according to claim 1, characterized in that, The end of the filling valve is connected to the parking brake valve assembly.

8. The loader emergency steering system according to claim 1, characterized in that, Hydraulic pipes are installed at the oil inlet of the high-voltage accumulator and the emergency unit.

9. The loader emergency steering system according to claim 1, characterized in that, The oil inlet of the high-voltage accumulator and the emergency unit is connected to the pump via a hydraulic pipe.

10. The loader emergency steering system according to claim 1, characterized in that, High-voltage accumulators are installed in pairs.

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