Wheel steering control system and vehicle

Abstract

A wheel steering control system comprises a steering pump and an electric control mechanism, the steering pump extracts hydraulic oil from a steering oil tank to enter a steering gear, the steering gear is communicated with a front axle booster cylinder, and the hydraulic oil acting in the front axle booster cylinder flows back to the steering oil tank after passing through the steering gear. A bypass pipeline is arranged between an outlet of the steering pump and an oil return outlet of the steering gear, and an overflow valve and an electric control ball valve are installed on the bypass pipeline. The electric control mechanism comprises travel switches, a power source and the electric control ball valve, the travel switches are installed on the front side and the rear side of a vehicle frame of a steering plumbing arm and can be jacked by the steering plumbing arm, the electric control ball valve is opened when the travel switches are closed, and the electric control ball valve is closed when the travel switches are opened. The maximum steering angle of the wheels can be limited in an electric control mode. The utility model further provides a vehicle comprising the wheel steering control system.

Description

Technical Field

[0001] The present application relates to the technical field of wheel steering, and in particular to a wheel steering control system and a vehicle. Background Art

[0002] like Figure 1 As shown, in the related art, when the front wheels of some engineering vehicles are turned, the limiting bolts of the axle and the rigid contact of the wheel hub are used to achieve the steering limiting function. This limiting method will damage the limiting bolts and the wheel hub. Long-term use will cause the limiting failure and cause safety accidents. At the same time, when steering is limited, the steering force will be transmitted to the suspension, which may cause the leaf spring and U-bolt to jump out of position, resulting in problems such as wheel steering misalignment. Utility Model Content

[0003] The present application aims to solve the above problems and provide a vehicle wheel steering control system that limits the maximum steering angle through electronic control.

[0004] This application adopts the following technical solutions:

[0005] A wheel steering control system includes a steering pump and an electronic control mechanism. The steering pump draws hydraulic oil from a steering oil tank into a steering gear. The steering gear is connected to a front axle power cylinder. The hydraulic oil acting in the front axle power cylinder flows through the steering gear and then returns to the steering oil tank. A bypass line is provided between the outlet of the steering pump and the return oil outlet of the steering gear. A relief valve and an electronically controlled ball valve are installed on the bypass line.

[0006] The electronic control mechanism includes a travel switch, a power supply and the electronically controlled ball valve. The travel switch is installed on the front and rear frames of the steering arm and can be pushed by the steering arm. When the travel switch is closed, the electronically controlled ball valve is opened, and when the travel switch is disconnected, the electronically controlled ball valve is closed.

[0007] Furthermore, the travel switch includes a push rod, a spring, a break contact and a make contact.

[0008] Furthermore, when the steering wheel is not rotated, the steering drop arm is not in contact with the travel switch.

[0009] Furthermore, when the steering wheel rotates, the steering arm moves with the steering wheel and touches one of the travel switches; when the steering wheel rotates in the opposite direction, the steering arm moves in the opposite direction and touches the other travel switch.

[0010] Furthermore, the electric control mechanism also includes a fuse.

[0011] Furthermore, the steering pump adopts a steering vane pump.

[0012] The present application also provides a vehicle including the above-mentioned wheel steering control system.

[0013] Beneficial effects of this application:

[0014] The present application can realize the electronic control system path by touching the switch of the steering arm during steering, open the electronically controlled ball valve, and allow the hydraulic oil to flow through the overflow valve, thereby reducing the pressure of the entire steering hydraulic system. As a result, the output torque of the steering gear and the output torque of the front axle power cylinder decrease linearly, which manifests as heavy steering (the steering wheel cannot be turned), achieving the steering limit function. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the oil circuit in the embodiment of this application;

[0016] Figure 2 This is a schematic diagram of the electric control mechanism in the embodiment of the present application;

[0017] Figure 3 This is a schematic diagram of the electronic control circuit in the embodiment of the present application;

[0018] In the figure: 1 steering pump, 2 steering oil tank, 3 steering gear, 4 front axle power cylinder, 5 electronically controlled ball valve, 6 relief valve, 7 travel switch, 8 insurance. DETAILED DESCRIPTION

[0019] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0020] In the description of this application, it should be understood that the terms "front", "rear", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this application.

[0021] Reference Figure 1 and 2The present application provides a wheel steering control system, including a steering pump 1 and an electronic control mechanism. The steering pump 1 draws hydraulic oil from a steering oil tank 2 and enters a steering gear 3. The steering gear 3 is connected to a front axle power cylinder 4. The hydraulic oil acting in the front axle power cylinder 4 flows through the steering gear 3 and then returns to the steering oil tank 2. A bypass line is provided between the outlet of the steering pump 1 and the return oil outlet of the steering gear 3. A relief valve 6 and an electronically controlled ball valve 5 are installed on the bypass line.

[0022] The electronic control mechanism includes a travel switch 7, a power supply and the electronically controlled ball valve 5. The travel switch 7 is installed on the front and rear frames of the steering arm and can be pushed by the steering arm. When the travel switch 7 is closed, the electronically controlled ball valve 5 is opened, and when the travel switch 7 is disconnected, the electronically controlled ball valve 5 is closed.

[0023] In the embodiment of the present application, the travel switch 7 includes a push rod, a spring, a break contact and a make contact.

[0024] In the embodiment of the present application, when the steering wheel is not rotated, the steering arm is not in contact with the travel switch 7.

[0025] In the embodiment of the present application, when the steering wheel rotates, the steering arm moves with the steering wheel and touches one of the travel switches 7. When the steering wheel rotates in the opposite direction, the steering arm moves in the opposite direction and touches the other travel switch.

[0026] In the embodiment of the present application, the electric control mechanism further includes a fuse 8 .

[0027] In the embodiment of the present application, the steering pump 1 is a steering vane pump.

[0028] The working principle of the embodiment of this application is as follows:

[0029] When the steering wheel turns left, it drives the steering gear 3 to turn left, causing the steering arm to rotate forward. When the steering arm reaches a certain angle, it contacts the front travel switch 7. When this contact pushes the travel switch 7 forward to the normally closed contact, the internal circuit of the travel switch 7 switches from an open state to a closed state. At this point, the power supply, travel switch 7, and electrically controlled ball valve 5 are in a closed loop. The solenoid valve of the electrically controlled ball valve 5 opens the hydraulic passageway of the electrically controlled ball valve 5, allowing hydraulic oil from the outlet of the steering pump 1 to enter the relief valve 6. The pressure of the entire steering hydraulic system can drop from a high set value to a low set value, for example, from 15 MPa to 2.5 MPa. As the hydraulic oil output system pressure drops, the output torque of the steering gear 3 and the output torque of the front axle booster cylinder 4 decrease linearly, resulting in a heavy steering (steering wheel cannot be turned), thus achieving the steering limit function. Similarly, when the steering wheel turns right, the steering arm triggers the rear travel switch 7, also achieving the right limit function. This application can achieve a linear limiting effect through the electronic control system in conjunction with the oil circuit system, effectively avoiding problems such as wheel steering misalignment caused by mechanical limiting of bolts and wheel hubs and leaf spring displacement.

[0030] The present application also provides a vehicle including the above-mentioned wheel steering control system.

[0031] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. A person skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A wheel steering control system, characterized in that: It includes a steering pump and an electronic control mechanism. The steering pump draws hydraulic oil from the steering oil tank into the steering gear. The steering gear is connected to the front axle power cylinder. The hydraulic oil acting in the front axle power cylinder flows through the steering gear and then flows back to the steering oil tank. A bypass line is provided between the outlet of the steering pump and the return oil outlet of the steering gear. A relief valve and an electronically controlled ball valve are installed on the bypass line. The electronic control mechanism includes a travel switch, a power supply and the electronically controlled ball valve. The travel switch is installed on the front and rear frames of the steering arm and can be pushed by the steering arm. When the travel switch is closed, the electronically controlled ball valve is opened, and when the travel switch is disconnected, the electronically controlled ball valve is closed.

2. A wheel steering control system according to claim 1, characterized in that: The travel switch comprises a push rod, a spring, a break contact and a make contact.

3. A wheel steering control system according to claim 1, characterized in that: When the steering wheel is not rotated, the steering drop arm is not in contact with the travel switch.

4. A wheel steering control system according to claim 1, characterized in that: When the steering wheel rotates, the steering arm moves with the steering wheel and touches one of the travel switches. When the steering wheel rotates in the opposite direction, the steering arm moves in the opposite direction and touches the other travel switch.

5. A wheel steering control system according to any one of claims 1 to 4, characterized in that: The electronic control mechanism further includes a fuse.

6. A wheel steering control system according to claim 5, characterized in that: The steering pump adopts a steering vane pump.

7. A vehicle, characterized in that: Includes the wheel steering control system according to claim 6.

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