Electric hydraulic steering system of articulated vehicle
By designing an electro-hydraulic steering system for articulated vehicles, which utilizes an electric steering pump and hydraulic cylinders to achieve vehicle steering, the steering problem of purely electric articulated vehicles is solved, providing a safe and effective steering solution.
Patent Information
- Application Number
- CN202520585247.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-03-31
AI Technical Summary
Existing pure electric articulated vehicles lack an effective electro-hydraulic steering system, which cannot meet steering requirements.
Design an articulated vehicle electro-hydraulic steering system, including an electric steering pump, hydraulic lines, a hydraulic valve steering mechanism, and a hydraulic cylinder. The hydraulic pump is driven by a high-voltage permanent magnet synchronous motor, and the vehicle steering is achieved by the extension and retraction of the hydraulic cylinder.
A safe and effective pure electric steering system is provided, which uses the extension and retraction of hydraulic cylinders to change the angle between the front and rear axles of the vehicle, thus meeting the steering requirements of pure electric articulated vehicles.
Smart Images
Figure CN223919382U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to pure electric hinged vehicle's steering technical field, concretely relates to a kind of hinged vehicle electric hydraulic steering system. BACKGROUND
[0002] The steering of current small hinged vehicle is full hydraulic type, which is different from the vehicle with front axle or rear axle steering, without mechanical steering gear mechanism and steering axle, with the development of new energy vehicle, pure electric hinged vehicle needs to match electric hydraulic system according to steering demand. UTILITY MODEL CONTENTS
[0003] The utility model solves the technical problems of pure electric hinged vehicle steering system, to solve the above problems, provide a kind of hinged vehicle electric hydraulic steering system.
[0004] The utility model is realized in the following way:
[0005] A kind of hinged vehicle electric hydraulic steering system, the electric hydraulic steering system includes electric steering oil pump 1, hydraulic line 2, hydraulic valve steering gear 3, hydraulic cylinder 4, hydraulic oil tank 5;The oil outlet of the hydraulic oil tank 5 is connected with the oil inlet of electric steering oil pump 1, the oil outlet of electric steering oil pump 1 is connected with the oil inlet P of hydraulic valve steering gear 3 by hydraulic line 2, the system oil return port T of hydraulic valve steering gear 3 is connected with hydraulic oil tank 5 by hydraulic line 2, the execution element oil inlet A of hydraulic valve steering gear 3 is connected with the rod cavity of hydraulic cylinder 4, and the execution element oil return port B of hydraulic valve steering gear 3 is connected with the rodless cavity of hydraulic cylinder 4.
[0006] The electric steering oil pump 1 includes controller, motor and hydraulic oil pump connected with motor and driven by motor;The control end of the motor is connected with the controller, and the controller is connected with the whole vehicle can bus, low voltage enables, for driving motor to drive hydraulic oil pump to generate high pressure oil, and the high pressure oil provides hydraulic power for system by hydraulic line 2.
[0007] The motor is high-voltage permanent magnet synchronous motor.
[0008] The hydraulic valve steering gear 3, when vehicle does not carry out steering operation, hydraulic oil directly from the oil inlet P of hydraulic valve steering gear 3 to oil return port, when vehicle steering, hydraulic oil from the execution element oil inlet A of hydraulic valve steering gear 3 to the rod cavity of hydraulic cylinder 4 after passing through oil cylinder backflow to the execution element oil return port B of hydraulic valve steering gear, at this time, oil cylinder elongation, the included angle between the oil cylinder side front and rear frame is increased, and vehicle steering is realized.
[0009] The beneficial effects of this utility model are as follows: This utility model uses an electric power steering pump as the hydraulic power source for the steering system. When an articulated vehicle is steering, the extension and retraction of the hydraulic cylinder changes the angle between the front and rear axles to achieve the steering action of the vehicle. Based on the characteristics of pure electric vehicles and combined with the current situation of articulated vehicles, it provides a safe and effective pure electric steering system solution. Attached Figure Description
[0010] Figure 1 This is a schematic diagram of the structure of this utility model.
[0011] Among them, 1 is the electric power steering pump; 2 is the hydraulic pipeline; 3 is the hydraulic valve steering gear; 4 is the hydraulic cylinder; 5 is the hydraulic oil tank; 6 is the front and rear frames and wheels; and 7 is the center hinge seat. Detailed Implementation
[0012] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0013] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same technical meaning as commonly understood by one of ordinary skill in the art to which this application pertains.
[0014] like Figure 1 As shown, an articulated vehicle electro-hydraulic steering system includes front and rear frames and wheels 6, as well as an electric steering pump 1, hydraulic lines 2, a hydraulic valve steering gear 3, a hydraulic cylinder 4, and a hydraulic oil tank 5 mounted on the front and rear frames. The oil outlet of the hydraulic oil tank 5 is connected to the oil inlet of the electric steering pump 1. The oil outlet of the electric steering pump 1 is connected to the oil inlet P of the hydraulic valve steering gear 3 through the hydraulic lines 2. The system return port T of the hydraulic valve steering gear 3 is connected to the hydraulic oil tank 5 through the hydraulic lines 2. The actuator inlet A of the hydraulic valve steering gear 3 is connected to the rod chamber of the hydraulic cylinder 4, and the actuator return port B of the hydraulic valve steering gear 3 is connected to the rodless chamber of the hydraulic cylinder 4.
[0015] It also includes a center hinge 7, which is a pivot connecting the front and rear frames. The hydraulic cylinder 4 stretches and compresses to make the front and rear frames rotate around the center hinge axis.
[0016] The electric power steering pump 1 includes a controller, a motor, and a hydraulic pump connected to and driven by the motor. The control terminal of the motor is connected to the controller, which is connected to the vehicle's CAN bus. The controller is enabled by low voltage and is used to drive the motor to drive the hydraulic pump to generate high-pressure oil. The high-pressure oil provides hydraulic power to the system through the hydraulic pipeline 2.
[0017] The motor is a high-voltage permanent magnet synchronous motor.
[0018] When the vehicle is not steering, the hydraulic oil flows directly from the inlet P to the return port of the hydraulic valve steering device 3. When the vehicle turns left or right, the hydraulic oil flows from the inlet A of the actuator of the hydraulic valve steering device 3 to the rod chamber of the hydraulic cylinder 4, passes through the cylinder, and flows back to the return port B of the actuator of the hydraulic valve steering device. At this time, the cylinder extends, and the angle between the front and rear frames on the cylinder side increases, thus enabling the vehicle to turn left or right.
[0019] The working principle of this utility model is as follows: When the vehicle starts and moves, the electric power steering pump drives the motor to drive the hydraulic pump to generate high-pressure oil. The high-pressure oil provides hydraulic power to the system through the hydraulic pipeline 2. If the controller of the electric power steering pump does not receive a steering signal, the hydraulic oil flows directly from the inlet P of the hydraulic valve steering device 3 to the return port. If the controller of the electric power steering pump receives a steering signal, the hydraulic oil flows from the inlet A of the actuator of the hydraulic valve steering device 3 to the rod chamber of the hydraulic cylinder 4, passes through the cylinder, and flows back to the return port B of the actuator of the hydraulic valve steering device. At this time, the cylinder extends, and the angle between the front and rear frames on the cylinder side increases, realizing the vehicle turning left or right.
[0020] This invention uses an electric power steering pump as the hydraulic power source for the steering system. When an articulated vehicle is steering, the extension and retraction of the hydraulic cylinder changes the angle between the front and rear axles to achieve the steering action. Based on the characteristics of pure electric vehicles and the current situation of articulated vehicles, this invention provides a safe and effective pure electric steering system solution.
[0021] The above description is only a preferred embodiment of the present utility model. It should be noted that those skilled in the art can make several changes and improvements without departing from the overall concept of the present utility model, and these should also be considered within the protection scope of the present utility model.
Claims
1. An articulated vehicle electro-hydraulic steering system, characterized in that: The electro-hydraulic steering system includes an electric steering pump (1), a hydraulic pipeline (2), a hydraulic valve steering gear (3), a hydraulic cylinder (4), and a hydraulic oil tank (5). The outlet of the hydraulic oil tank (5) is connected to the inlet of the electric steering pump (1). The outlet of the electric steering pump (1) is connected to the inlet P of the hydraulic valve steering gear (3) through the hydraulic pipeline (2). The system return port T of the hydraulic valve steering gear (3) is connected to the hydraulic oil tank (5) through the hydraulic pipeline (2). The actuator inlet A of the hydraulic valve steering gear (3) is connected to the rod chamber of the hydraulic cylinder (4). The actuator return port B of the hydraulic valve steering gear (3) is connected to the rodless chamber of the hydraulic cylinder (4).
2. The articulated vehicle electro-hydraulic steering system according to claim 1, characterized in that: The electric power steering pump (1) includes a controller, a motor, and a hydraulic pump connected to and driven by the motor; the control terminal of the motor is connected to the controller, the controller is connected to the vehicle CAN bus, and low-voltage enable is used to drive the motor to drive the hydraulic pump to generate high-pressure oil, and the high-pressure oil provides hydraulic power to the system through the hydraulic pipeline (2).
3. The articulated vehicle electro-hydraulic steering system according to claim 2, characterized in that: The motor is a high-voltage permanent magnet synchronous motor.
4. The articulated vehicle electro-hydraulic steering system according to claim 1, characterized in that: When the vehicle is not steering, the hydraulic oil flows directly from the inlet P of the hydraulic valve steering device (3) to the return port. When the vehicle is steering, the hydraulic oil flows from the inlet A of the actuator of the hydraulic valve steering device (3) to the rod chamber of the hydraulic cylinder (4), and then flows back to the return port B of the actuator of the hydraulic valve steering device. At this time, the cylinder extends and the angle between the front and rear frames on the cylinder side increases, thus realizing vehicle steering.