CN215361530U - Hydraulic system for steering of electric off-road vehicle - Google Patents
Hydraulic system for steering of electric off-road vehicle Download PDFInfo
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- CN215361530U CN215361530U CN202121492723.XU CN202121492723U CN215361530U CN 215361530 U CN215361530 U CN 215361530U CN 202121492723 U CN202121492723 U CN 202121492723U CN 215361530 U CN215361530 U CN 215361530U
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Abstract
The utility model discloses a hydraulic system for steering an electric off-road vehicle, which comprises a hydraulic oil tank, a first motor, a second motor, a third motor, a hydraulic pump driven by the first motor, a hydraulic pump driven by the second motor, a hydraulic pump driven by the third motor, a front axle steering system, a rear axle steering system and a vehicle body posture leveling system, wherein the hydraulic pump driven by the first motor and the hydraulic pump driven by the second motor are respectively connected with the vehicle body posture leveling system and the front axle steering system through emergency valves; the hydraulic steering system can simultaneously realize the functions of steering the front axle and the rear axle of the electric off-road vehicle and leveling the posture of the vehicle body in the driving process; and the first motor and the second motor both adopt high-voltage and low-voltage double-source motors, so that when the high voltage of the vehicle breaks down, the emergency steering function under the driving condition of vehicle-mounted 24V low-voltage electric drive can be realized, and the safety of the vehicle and personnel is ensured.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to the technical field of vehicles, in particular to a hydraulic system for steering an electric off-road vehicle.
[ background of the utility model ]
At present, the chassis of the electric off-road vehicle needs to adopt electric control hydraulic grouping steering due to the use particularity: the front axle uses hydraulic power assistance, the rear axle uses electric control hydraulic active steering, the posture of the vehicle body is leveled, and the like; the hydraulic system of the electric power chassis usually adopts a mode of switching power sources of a hydraulic system for steering and a vehicle body posture leveling hydraulic system to realize the functions of hydraulic power-assisted steering of a front axle of a vehicle, electric control hydraulic active steering of a rear axle and vehicle body posture leveling of the vehicle.
However, the heavy off-road vehicle has extremely high requirements on the trafficability, the smoothness and the equipment, and the off-road vehicle in the prior art can not realize the dynamic vehicle body posture leveling function in the vehicle driving process although the off-road vehicle meets the vehicle steering and vehicle static leveling functions under the off-road condition.
[ Utility model ] content
Aiming at the defects of the prior art, the utility model aims to provide a hydraulic system for steering of an electric off-road vehicle, which can simultaneously realize the functions of front-back grouped steering and dynamic and static vehicle body posture leveling, has an emergency steering function and ensures the driving safety of the vehicle.
In order to achieve the purpose, the utility model provides a hydraulic system for steering an electric off-road vehicle, which comprises a hydraulic oil tank, a first motor, a second motor, a third motor, a hydraulic pump driven by the first motor, a hydraulic pump driven by the second motor, a hydraulic pump driven by the third motor, a front axle steering system, a rear axle steering system and a vehicle body posture leveling system;
oil outlets of the hydraulic pump driven by the first motor and the hydraulic pump driven by the second motor are respectively connected with the vehicle body posture leveling system and the front axle steering system through emergency valves, and oil return ports of the vehicle body posture leveling system and the front axle steering system are respectively connected with the hydraulic oil tank; and a hydraulic pump driven by a third motor is connected with a rear axle steering system.
Preferably, the first motor and the second motor are both high-voltage and low-voltage dual-source motors, and the third motor is a high-voltage motor.
Preferably, a flow sensor is arranged on a pipeline connecting the hydraulic pump driven by the second motor and the emergency valve, and is used for detecting the flow of the hydraulic oil pumped to the emergency valve by the hydraulic pump driven by the second motor.
Preferably, an indicator light is connected to the emergency valve, when the flow sensor detects that the flow of the hydraulic oil pumped to the emergency valve by the hydraulic pump driven by the second motor is insufficient, the indicator light is turned on, the emergency valve can automatically switch an oil way, oil supply for the vehicle body posture leveling system is stopped, and driving safety is guaranteed.
Preferably, an unloading assembly is arranged in the emergency valve, and when the front axle steering system does not work, redundant hydraulic oil is unloaded through the unloading valve.
Preferably, a hydraulic pump driven by a third motor is connected with a rear axle steering system through an oil source control valve, and an oil return port of the oil source control valve is connected with a hydraulic oil tank, so that the situation that the valve is damaged due to excessive hydraulic oil and too high pressure of the hydraulic oil to the rear axle is avoided.
Preferably, the rear axle steering system comprises an electric control proportional control valve bank, a rear axle centering locking oil cylinder, a rear axle steering power-assisted oil cylinder and an energy accumulator are connected to the electric control proportional control valve bank, an oil return port of the electric control proportional control valve bank is connected with a hydraulic oil tank, when a high voltage of a vehicle breaks down, the rear axle steering power-assisted oil cylinder does not work, the energy accumulator is used for providing power for the rear axle centering locking oil cylinder, and the rear axle centering locking function is achieved.
Preferably, a pressure sensor is arranged on the energy accumulator, and when the pressure sensor detects that the pressure of the energy accumulator is lower than a set value, the energy accumulator is charged through an electric control proportional control valve group; when the rear axle does not work in steering and the pressure sensor detects that the pressure of the energy accumulator is higher than a set value, the hydraulic oil is unloaded and returned to the hydraulic oil tank through the electric control proportional control valve bank.
Preferably, the system further comprises a controller, and the controller is respectively and electrically connected with the flow sensor, the indicator light, the pressure sensor and the electronic control proportional control valve group.
The utility model has the beneficial effects that:
the hydraulic steering system can simultaneously realize the functions of steering the front axle and the rear axle of the electric off-road vehicle and leveling the posture of the vehicle body in the driving process;
according to the hydraulic steering system, the first motor and the second motor both adopt high-voltage and low-voltage dual-source motors, so that when a vehicle breaks down in high voltage, an emergency steering function under the driving condition of vehicle-mounted 24V low-voltage electric drive can be adopted, and the safety of vehicles and personnel is ensured;
the arrangement of the rear axle centering and locking function in the rear axle steering system ensures that the rear axle wheels can be ensured to run straight and ensure the running safety when the rear axle steering is not needed and the high-voltage power of the vehicle fails.
[ description of the drawings ]
FIG. 1 is a schematic diagram of a hydraulic system for steering an electric off-road vehicle according to the present invention;
wherein, 1-a hydraulic oil tank; 2-a first electric machine; 3-a hydraulic pump driven by a first motor; 4-a second motor; 5-a hydraulic pump driven by a second motor; 6-a third motor; 7-a hydraulic pump driven by a third motor; 8-an emergency valve; 9-front axle steering system; 10-a vehicle body attitude leveling system; 11-a flow sensor; 12-an indicator light; 13-an oil source control valve; 14-an electric control proportional control valve group; 1401-an unloading valve; 1402-accumulator charge valve; 1403-centering latching valve; 1404-a steering assist valve; 15-centering and locking the oil cylinder by the rear axle; 16-a rear axle steering power-assisted cylinder; 17-an accumulator; 18-pressure sensor.
[ detailed description ] embodiments
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described with the following embodiments, but is by no means limited thereto. The following is a description of the preferred embodiments of the present invention, and should not be taken as limiting the utility model, but rather as embodying the utility model in its broadest form and as indicating any variations, equivalents and modifications within the spirit and scope of the present invention.
As shown in fig. 1, the utility model provides a hydraulic system for steering an electric off-road vehicle, comprising a hydraulic oil tank 1, a first motor 2, a first motor-driven hydraulic pump 3, a second motor 4, a second motor-driven hydraulic pump 5, a third motor 6, a third motor-driven hydraulic pump 7, a front axle steering system 9, a rear axle steering system 12 and a vehicle body posture leveling system 10; oil outlets of a hydraulic pump 3 driven by a first motor and a hydraulic pump 5 driven by a second motor are respectively connected with a vehicle body posture leveling system 10 and a front axle steering system 9 through an emergency valve 8, and oil return ports of the vehicle body posture leveling system 10 and the front axle steering system 9 are respectively connected with a hydraulic oil tank 1;
and a hydraulic pump 7 driven by a third motor is connected with a rear axle steering system through an oil source control valve 13, and an oil return port of the oil source control valve 13 is connected with the hydraulic oil tank 1.
Further, the first motor 2 and the second motor 4 are both high-voltage and low-voltage dual-source motors, and the third motor 6 is a high-voltage motor;
further, a flow sensor 11 is arranged on a pipeline connecting the second motor-driven hydraulic pump 5 and the emergency valve 8, and is used for detecting the flow of the hydraulic oil pumped from the second motor-driven hydraulic pump 5 to the emergency valve 8.
Furthermore, an indicator light is connected to the emergency valve 8, when the flow sensor 11 detects that the flow of the hydraulic oil pumped to the emergency valve 8 by the hydraulic pump driven by the second motor is insufficient, the indicator light 12 is turned on, the emergency valve 8 can automatically switch an oil way, oil supply for the vehicle body posture leveling system is stopped, and driving safety is guaranteed.
Further, in this embodiment, the emergency valve is selected from YJF-00 produced by jinan elm oil grinding, an unloading assembly is disposed in the emergency valve, and when the front axle steering system does not work, redundant hydraulic oil is unloaded to the hydraulic oil tank through the unloading assembly in the emergency valve.
Further, the rear axle steering system has the same principle as an electric control hydraulic active steering system in a dual-mode steering system of a special automobile chassis of the prior patent CN201720331448.0, and comprises an electric control proportional control valve group 14, wherein the electric control proportional control valve group 14 is connected with a rear axle centering locking oil cylinder 15, a rear axle steering power-assisted oil cylinder 16 and an energy accumulator 17, and when a high voltage of a vehicle fails or the rear axle steering does not work, the energy accumulator 17 charges the rear axle centering locking oil cylinder 15, so that the rear axle centering locking function is realized;
further, a pressure sensor 18 is arranged on the accumulator 17, and when the pressure sensor 18 detects that the pressure of the accumulator 17 is lower than a set value, the accumulator 17 is filled with liquid through the electronic control proportional control valve bank 14;
furthermore, the model of the electric proportional control valve group 14 is HTFYKS1613D06, and components such as an unloading valve 1401, an accumulator charging valve 1402, a centering locking valve 1403, a power steering valve 1404 and the like are arranged in the electric proportional control valve group; the oil return port of the unloading valve 1401 is connected with the hydraulic oil tank 1; an oil inlet of the centering locking valve 1403 is connected with the energy accumulator 17, and an oil outlet of the centering locking valve is connected with the rear axle centering locking oil cylinder 15; the oil outlet of the steering power-assisted valve 1404 is connected with a rear axle steering power-assisted oil cylinder 16; when the accumulator 17 needs to be charged, the accumulator charging valve 1402 is powered on, so that the oil return path of the unloading valve 1401 is disconnected, the electronic control proportional control valve group 14 charges the accumulator, and when the rear axle does not work in a steering mode and the pressure sensor 18 detects that the pressure of the accumulator 17 is higher than a set value, hydraulic oil is unloaded and returned to the hydraulic oil tank 1 through the unloading valve 1401.
The working principle of the hydraulic system for steering of the utility model is as follows: when the vehicle starts high-voltage electric driving to run, a hydraulic pump 3 driven by a first motor and a hydraulic pump 5 driven by a second motor respectively supply oil to a vehicle body posture leveling system 10 and a front axle steering system 9 through an emergency valve 8, and a hydraulic pump 7 driven by a third motor supplies oil to a rear axle steering power-assisted oil cylinder through an oil source control valve 13; thereby ensuring that the front and rear axle steering and the vehicle body leveling system of the vehicle work simultaneously; when the front axle steering system 9 does not work, the emergency valve 8 only supplies oil to the vehicle body posture leveling system, and redundant hydraulic oil is discharged through an unloading assembly in the emergency valve; when the rear axle does not work in steering and the pressure value detected by the pressure sensor 18 is greater than a set value, hydraulic oil output by the hydraulic pump 7 driven by the third motor is discharged through the electric control proportional control valve group 14, and the energy accumulator 17 supplies oil to the rear axle centering locking oil cylinder 15, so that the rear axle centering locking function is realized;
when the hydraulic pump 5 driven by the second motor breaks down under the high-voltage electric driving working condition, the flow sensor detects that the flow of hydraulic oil pumped to the emergency valve by the hydraulic pump driven by the second motor is insufficient, the indicator lamp 12 is lightened, the hydraulic pump 3 driven by the first motor supplies oil to the front axle steering system through the emergency valve 8 to provide a power source for the front axle steering system 9, so that the front axle steering system 9 can normally work, the emergency steering is realized, and the safety of vehicle running is ensured;
when the high voltage of the vehicle breaks down, the vehicle-mounted low-voltage 24V power supply can still drive the first motor 2 and the second motor 4 to work, at the moment, the third motor 6 does not work, the energy accumulator 17 is used for supplying oil to the rear axle centering locking oil cylinder 15, the rear axle centering locking function is realized, and the wheels of the rear axle of the vehicle can run linearly; the hydraulic pump 3 driven by the first motor and the hydraulic pump 5 driven by the second motor respectively supply oil to the vehicle body posture leveling system 10 and the front axle steering system 9 through the emergency valve 8, so that the vehicle body posture leveling function and the emergency steering function under the condition of 24V vehicle-mounted low pressure are realized, and the vehicle running safety is ensured;
when the vehicle high-voltage power supply and the hydraulic pump 5 driven by the second motor are in failure, the vehicle-mounted low-voltage 24V power supply works, the flow sensor detects that the flow of hydraulic oil pumped to the emergency valve by the hydraulic pump driven by the second motor is insufficient, the indicator lamp 12 is lightened, the hydraulic pump 3 driven by the first motor supplies oil to the front axle steering system through the emergency valve, and the vehicle body posture leveling system 10 does not work, so that emergency steering is realized; at the moment, the third motor 6 does not work, the energy accumulator 17 supplies oil to the rear axle centering locking oil cylinder 15, the rear axle centering locking function is realized, the rear axle wheels of the vehicle are guaranteed to run linearly, and the running safety of the vehicle is guaranteed.
The above-described embodiments are merely illustrative of certain embodiments of the present invention, which are described in more detail and detail, but are not to be construed as limiting the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which shall all fall within the scope of protection of this section. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (8)
1. A hydraulic system for steering an electric cross-country vehicle is characterized by comprising a hydraulic oil tank, a first motor, a second motor, a third motor, a hydraulic pump driven by the first motor, a hydraulic pump driven by the second motor, a hydraulic pump driven by the third motor, a front axle steering system, a rear axle steering system and a vehicle body posture leveling system;
oil outlets of the hydraulic pump driven by the first motor and the hydraulic pump driven by the second motor are respectively connected with the vehicle body posture leveling system and the front axle steering system through emergency valves, and oil return paths of the vehicle body posture leveling system and the front axle steering system are respectively connected with the hydraulic oil tank; and a hydraulic pump driven by a third motor is connected with a rear axle steering system.
2. The hydraulic system for steering of an electric off-road vehicle as claimed in claim 1, wherein the first motor and the second motor are high and low voltage dual source motors, and the third motor is a high voltage motor.
3. The hydraulic system for steering of an electric off-road vehicle as claimed in claim 1, wherein a flow sensor is disposed on a pipeline connecting the second motor-driven hydraulic pump and the emergency valve for detecting the flow rate of the hydraulic oil pumped from the second motor-driven hydraulic pump to the emergency valve.
4. The hydraulic system for steering an electric off-road vehicle as claimed in claim 3, wherein an indicator light is connected to the emergency valve.
5. The hydraulic system for steering of an electric off-road vehicle as claimed in claim 4, wherein the hydraulic pump driven by the third motor is connected with the rear axle steering system through an oil source control valve, and the oil return path of the oil source control valve is connected with the hydraulic oil tank.
6. The hydraulic system for steering of an electric off-road vehicle according to claim 5, wherein the rear axle steering system comprises an electric control proportional control valve set, a rear axle steering power-assisted cylinder, a rear axle centering locking cylinder and an energy accumulator are connected to the electric control proportional control valve set, and an oil return port of the electric control proportional control valve set is connected with a hydraulic oil tank.
7. The hydraulic system for steering of an electric off-road vehicle as claimed in claim 6, wherein a pressure sensor is provided on the accumulator, and when the pressure sensor detects that the accumulator pressure is lower than a set value, the accumulator is charged through the electrically controlled proportional control valve set.
8. The hydraulic system for steering of an electric off-road vehicle as claimed in claim 7, further comprising a controller electrically connected to the flow sensor, the indicator light, the pressure sensor and the electrically controlled proportional control valve set, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121492723.XU CN215361530U (en) | 2021-07-01 | 2021-07-01 | Hydraulic system for steering of electric off-road vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121492723.XU CN215361530U (en) | 2021-07-01 | 2021-07-01 | Hydraulic system for steering of electric off-road vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215361530U true CN215361530U (en) | 2021-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121492723.XU Active CN215361530U (en) | 2021-07-01 | 2021-07-01 | Hydraulic system for steering of electric off-road vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215361530U (en) |
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2021
- 2021-07-01 CN CN202121492723.XU patent/CN215361530U/en active Active
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