Steering control system of explosion-proof rubber-tyred vehicle
By setting up a pressure feedback port and shuttle valve connection in the steering control system of the explosion-proof rubber-wheeled vehicle, the hydraulic system control was optimized, solving the problem of difficult steering and achieving the effect of easy steering and fewer turns.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-04
- Publication Date
- 2026-04-10
AI Technical Summary
Existing hydraulic steering systems for explosion-proof rubber-tired vehicles suffer from difficulties in steering due to improper hydraulic system control, resulting in insufficient hydraulic assistance during movement and turning.
An explosion-proof rubber-wheeled vehicle steering control system was designed. By setting pressure feedback ports on the proportional multi-way valve, flow amplifier, steering gear and filling valve, and using shuttle valve to connect these feedback ports to the variable piston pump, the flow rate can be controlled separately from other circuits, and the hydraulic oil pressure of the steering gear can be guaranteed first.
It increases steering pressure and flow, achieving easier steering and fewer turns, thus solving the problem of difficult steering.
Smart Images
Figure CN224104145U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a kind of explosion-proof rubber-tired vehicle steering control system, belong to steering system technical field. BACKGROUND
[0002] Explosion-proof rubber-tired vehicle is widely recognized by coal mine users due to its flexible and fast characteristics. However, the existing explosion-proof rubber-tired vehicle mainly adopts a hydraulic steering control system. Due to unreasonable control of the hydraulic system, the proportional multi-way valve and the hydraulic steering system share a hydraulic oil circuit, which causes the steering system to fail to obtain sufficient hydraulic assistance when the explosion-proof rubber-tired vehicle needs to move and steer, resulting in steering difficulty. SUMMARY
[0003] To solve the technical problems existing in the prior art, the utility model provides an explosion-proof rubber-tired vehicle steering control system with a reasonable structure design, which can prioritize the hydraulic pressure of the steering gear when walking.
[0004] To achieve the above-mentioned purpose, the utility model employs the technical scheme of an explosion-proof rubber-tired vehicle steering control system, which comprises a hydraulic oil tank, a variable plunger pump and a steering gear. The variable plunger pump is connected to the hydraulic oil tank. The oil outlet of the variable plunger pump is connected to a high-pressure filter. The oil outlet of the high-pressure filter is connected to a proportional multi-way valve through a first pipeline and connected to a flow amplifier through a second pipeline. The flow amplifier is connected to the steering gear. The EF port of the flow amplifier is connected to a liquid filling valve. The flow amplifier, the steering gear, the proportional multi-way valve and the liquid filling valve are respectively provided with pressure feedback ports. The pressure feedback ports are respectively connected to shuttle valves through feedback pipelines. The shuttle valves are connected to the control valve of the variable plunger pump.
[0005] Preferably, the high-pressure filter is further connected to an overflow pipe, which is connected to the hydraulic oil tank. The overflow pipe is provided with an overflow valve.
[0006] Preferably, the oil inlet of the variable plunger pump is connected to an oil suction filter.
[0007] Compared with the prior art, the utility model has the following technical effects: the utility model adopts one pressure feedback port on each of the proportional multi-way valve, the flow amplifier, the steering gear and the liquid filling valve. The shuttle valves are used to connect the pressure feedback ports, which are finally collected on the variable plunger pump. The flow and pressure of the pump are adjusted by sending signals to the variable plunger pump. This steering control circuit separates the flow of the proportional multi-way valve from the flows of the other two circuits. During actual operation, the braking and steering are generally not actuated when the proportional multi-way valve is actuated. Therefore, the EF port of the flow amplifier is connected to the P port of the liquid filling valve, which can prioritize steering when walking, improves the steering pressure and flow, and realizes the functions of easy steering and fewer turns. Attached Figure Description
[0008] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation
[0009] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0010] like Figure 1 As shown, a steering control system for an explosion-proof rubber-wheeled vehicle includes a hydraulic oil tank 1, a variable displacement piston pump 2, and a steering gear 3. The variable displacement piston pump 2 is connected to the hydraulic oil tank 1. A high-pressure filter 5 is connected to the outlet of the variable displacement piston pump 2. The outlet of the high-pressure filter 5 is connected to a proportional multi-way valve 7 via a first pipeline 6 and to a flow amplifier 9 via a second pipeline 8. The flow amplifier 9 is connected to the steering gear 3. A filling valve 10 is connected to the EF port of the flow amplifier 9. Pressure feedback ports are respectively provided on the flow amplifier 9, the steering gear 3, the proportional multi-way valve 7, and the filling valve 10. These pressure feedback ports are connected to a shuttle valve 12 via a feedback pipeline 11. The shuttle valve 12 is connected to the control valve of the variable displacement piston pump 2. An overflow pipe 13 is also connected to the high-pressure filter 5, and the overflow pipe 13 is connected to the hydraulic oil tank 1. An overflow valve 14 is installed on the overflow pipe 13. An oil suction filter 4 is connected to the inlet of the variable displacement piston pump 1.
[0011] In this invention, a proportional multi-way valve controls the hydraulic cylinder, enabling the movement of the vehicle's working mechanisms; a steering gear + flow amplifier controls the vehicle's steering; and a filling valve stores energy to release the brakes. Each of the proportional multi-way valve 7, flow amplifier 9, steering gear 3, and filling valve 10 has a pressure feedback port. These ports are connected via shuttle valves, ultimately converging on a variable displacement piston pump. A signal is sent to the variable displacement piston pump 2 to regulate its flow rate and pressure. This steering control circuit separates the flow rate of the proportional multi-way valve from the other two circuits because, in actual operation, braking and steering are generally not activated when the proportional multi-way valve is actuated. Therefore, the EF port of the flow amplifier is connected to the P port of the filling valve, prioritizing steering during movement, increasing steering pressure and flow rate, and achieving easier steering with fewer turns.
[0012] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model shall be included within the scope of the present utility model.
Claims
1. An explosion-proof rubber-tyred vehicle steering control system comprising a hydraulic fluid tank, a variable displacement piston pump and a steering gear, characterised in that: The hydraulic oil tank is connected with a variable plunger pump, the oil outlet of the variable plunger pump is connected with a high-pressure filter, the oil outlet of the high-pressure filter is connected with a proportional multi-way valve through a first pipeline and connected with a flow amplifier through a second pipeline, the flow amplifier is connected with a steering gear, the EF port of the flow amplifier is connected with a liquid filling valve, the flow amplifier, the steering gear, the proportional multi-way valve and the liquid filling valve are respectively provided with pressure feedback ports, the pressure feedback ports are respectively connected with shuttle valves through feedback pipelines, the shuttle valves are connected with the control valve of the variable plunger pump.
2. The explosion-proof rubber-tyred vehicle steering control system according to claim 1, characterized in that: The high-pressure filter is further connected with an overflow pipe, the overflow pipe is connected with the hydraulic oil tank, and the overflow pipe is provided with an overflow valve.
3. The explosion-proof rubber-tyred vehicle steering control system of claim 1, wherein: The oil inlet of the variable plunger pump is connected with an oil suction filter.