A multi-power source hydraulic steering system for a dual body all terrain vehicle

Abstract

The present application provides a kind of multi-power source hydraulic steering system for double vehicle body all-terrain vehicle to the power loss problem that may appear in all-terrain vehicle steering system, including engine 1, main pump 2 and hydraulic steering gear 4, engine 1 simultaneously drives main pump 2 and generator 8, generator 8 is connected to battery 9, battery 9 powers electric hydraulic pump 11 when needed, electric hydraulic pump 11 and the output oil line of main pump 2 are connected in parallel into hydraulic steering gear 4.By organic integration, seamless connection of multi-power source, power perception cooperation, make all-terrain vehicle can fully improve safety steering behavior, maximize to ensure the safety of vehicle in use.

Description

TECHNICAL FIELD

[0001] The present application relates to a steering control system of an all-terrain vehicle. BACKGROUND

[0002] The double-body all-terrain vehicle is mainly applied to the national defense construction industry and the natural disaster emergency rescue field in China. It can realize the driving on various complex off-road surfaces such as desert, grassland and snowfield, and has amphibious driving capability, depending on its efficient driving performance and all-terrain driving capability. When working, the all-terrain vehicle is always in the front line of work, so it is necessary to ensure its outstanding off-road escape capability and driving safety.

[0003] The existing all-terrain vehicle mainly relies on a hydraulic pump to directly drive steering, and some models also increase an accumulator to assist steering, but there is still a certain risk of steering, especially in the case of continuous downhill in the Tibetan area. When the engine of the vehicle is off, it cannot be braked in time. At this time, if the vehicle cannot control the body posture well, it is extremely likely to cause a safety accident. Since the accumulator is generally shared by the brake and the steering, the pressure is released too fast, and the safety control of steering cannot be guaranteed. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a safer multi-power source hydraulic steering system for the all-terrain vehicle to solve the possible power loss problem of the all-terrain vehicle steering system.

[0005] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

[0006] A multi-power source hydraulic steering system for a double-body all-terrain vehicle, comprising an engine 1, a main pump 2 and a hydraulic steering gear 4, the engine 1 simultaneously drives the main pump 2 and a generator 8, the generator 8 is connected to a storage battery 9, the storage battery 9 supplies power to an electric hydraulic pump 11 when needed, and the output oil lines of the electric hydraulic pump 11 and the main pump 2 are connected in parallel to the hydraulic steering gear 4.

[0007] An accumulator 5 is connected to the inlet pipeline of the hydraulic steering gear 4.

[0008] A pressure sensor 13 is installed on the inlet pipeline of the hydraulic steering gear 4, the signal of the pressure sensor 13 is input to a vehicle-mounted controller 14, and the vehicle-mounted controller 14 controls whether the electric hydraulic pump 11 works.

[0009] A relay 10 is installed between the electric hydraulic pump 11 and the storage battery 9, and the relay 10 is controlled to be opened and closed by the vehicle-mounted controller 14.

[0010] A safety overflow valve 6 is connected to the inlet pipeline of the hydraulic steering gear 4.

[0011] A one-way valve is installed on the output oil line of the electric hydraulic pump 11 and the main pump 2.

[0012] When the vehicle-mounted controller 14 monitors that the detection value of the pressure sensor 13 is lower than the preset value, the driving relay 10 is closed.

[0013] The beneficial effects of the present application are:

[0014] Through organic integration, seamless connection of multiple power sources, power perception cooperation, the all-terrain vehicle can fully improve the safe steering behavior, and maximize the safety of the vehicle in use. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is the schematic diagram of the hydraulic steering system. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application.

[0017] Embodiment 1:

[0018] As Figure 1 , the steering system includes an engine 1, a main pump 2, a check valve 3, a hydraulic steering gear 4, an accumulator 5, a safety overflow valve 6, a hydraulic oil tank 7, a generator 8, a storage battery 9, a relay 10, an electric hydraulic pump 11, a check valve 12, a pressure sensor 13, a vehicle-mounted controller 14, etc.

[0019] The engine 1 drives the main pump 2 and the generator 8 at the same time, the generator 8 is connected to the storage battery 9, the storage battery 9 supplies power to the electric hydraulic pump 11 when needed, the electric hydraulic pump 11 and the output oil line of the main pump 2 are connected in parallel to the hydraulic steering gear 4, and the accumulator 5 is connected to the inlet oil line of the hydraulic steering gear 4. The pressure sensor 13 is installed on the inlet oil line of the hydraulic steering gear 4, the signal of the pressure sensor 13 is input to the vehicle-mounted controller 14, and the vehicle-mounted controller 14 controls whether the electric hydraulic pump 11 works. The relay 10 is installed between the electric hydraulic pump 11 and the storage battery 9, and the relay 10 is controlled to open and close by the vehicle-mounted controller 14. The safety overflow valve 6 is connected to the inlet oil line of the hydraulic steering gear 4. The check valve is installed on the output oil line of the electric hydraulic pump 11 and the main pump 2.

[0020] When the engine 1 works, the main pump 2 and the generator 8 work at the same time;

[0021] When the main pump 2 works, the oil suction port sucks hydraulic oil from the hydraulic oil tank 7, the high-pressure oil of the oil outlet opens the check valve 3 (reverse stop), reaches the hydraulic steering gear 4, and at the same time, the high-pressure oil charges the accumulator 5 to ensure that the accumulator maintains pressure. As the first power source of the steering system.

[0022] When the generator 8 works, the generated electric energy is stored in the storage battery 9;

[0023] When the main pump 2 is not working, the storage of high-pressure hydraulic oil of the accumulator 5 can directly drive the steering gear, ensuring that the steering gear can realize steering when working. As the second power source of the steering system, the second power source acts as an effective buffer between the first power source and the third power source, realizing seamless connection of multiple power sources.

[0024] When the vehicle is powered on, the pressure sensor 13 works continuously and feeds back the pressure signal to the vehicle-mounted controller 14 in real time. When the controller 14 detects that the P port pressure of the hydraulic steering gear 4 is lower than the minimum allowable steering pressure, it immediately drives the relay 10 to close, and then the electric energy of the battery drives the electric hydraulic pump 11 to work. The electric hydraulic pump 11 provides high-pressure hydraulic oil when working, which directly reaches the hydraulic steering gear 4 through the one-way valve 12 (reverse stop), ensuring the safe steering behavior of the vehicle. As the third power source of the steering system.

[0025] If the high-pressure oil output by the main pump 2, the accumulator 5 and the electric hydraulic pump 11 exceeds the maximum allowable pressure of the steering system, the safety overflow valve 6 is opened for rapid pressure relief overflow, and the overflow oil directly reaches the hydraulic oil tank 7.

Claims

1. A multi-power source hydraulic steering system for a dual-body all-terrain vehicle, comprising an engine (1), a main pump (2), and a hydraulic steering gear (4), characterized in that: The engine (1) drives the main pump (2) and the generator (8) at the same time. The generator (8) is connected to the battery (9). The battery (9) supplies power to the electric hydraulic pump (11) when needed. The output oil circuits of the electric hydraulic pump (11) and the main pump (2) are connected in parallel to the hydraulic steering gear (4). An accumulator (5) is connected to the oil inlet pipe of the hydraulic steering gear (4). A pressure sensor (13) is installed on the oil inlet pipe of the hydraulic steering gear (4). The signal of the pressure sensor (13) is input to the vehicle controller (14). The vehicle controller (14) controls whether the electric hydraulic pump (11) works. When the main pump (2) does not work, the high-pressure hydraulic oil stored in the accumulator (5) directly drives the steering gear to ensure that the steering gear can achieve steering when it works. The accumulator (5) serves as the second power source of the steering system. The second power source serves as a buffer between the first power source, the main pump (2), and the third power source, the electric hydraulic pump (11), to achieve seamless connection of multiple power sources.

2. The multi-power source hydraulic steering system for a dual-body all-terrain vehicle according to claim 1, characterized in that: A relay (10) is installed between the electric hydraulic pump (11) and the battery (9), and the relay (10) is controlled to open and close by the vehicle controller (14).

3. The multi-power source hydraulic steering system for a dual-body all-terrain vehicle according to claim 1 or 2, characterized in that: A safety relief valve (6) is connected to the oil inlet line of the hydraulic steering gear (4).

4. The multi-power source hydraulic steering system for a dual-body all-terrain vehicle according to claim 1 or 2, characterized in that: One-way valves are installed on the output oil lines of the electric hydraulic pump (11) and the main pump (2).

5. The multi-power source hydraulic steering system for a dual-body all-terrain vehicle according to claim 2, characterized in that: When the vehicle controller (14) detects that the pressure sensor (13) detects that the value is lower than the preset value, it drives the relay (10) to close.

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