Integrated oil source valve for wheel excavator
By designing an integrated oil source valve, combining steering control, electromagnetic control of the equipment and pilot oil source control functions, the problems of many types of parts and complex pipeline connections in the existing technology are solved, and the effects of cost reduction and diversification of functions are achieved.
Patent Information
- Application Number
- CN202421936353.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-12
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-08-12
AI Technical Summary
In existing wheeled excavators, steering control, equipment electromagnetic control and pilot oil source control require independent oil source valves, resulting in a wide variety of parts, complex pipeline connections, and high costs.
Design an integrated oil source valve, combining steering control, electromagnetic control of the equipment and pilot oil source control functions, to reduce the types of parts and pipeline connections. The oil source valve includes a valve body, a steering control oil circuit and a pressure-regulating drive oil circuit, and achieves multi-function control through a two-position three-way solenoid valve and a three-position four-way solenoid valve.
Through integrated multi-function control, the types of parts and pipeline connections are reduced, and the cost is reduced. At the same time, the steering control and equipment control of wheeled excavators are realized.
Smart Images
Figure CN222963101U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of oil source valves, in particular to an integrated oil source valve for a wheeled excavator. Background Technique
[0002] With the continuous progress of modern technology and the rapid development of hydraulic technology globally, excavators, as important earthwork construction machinery, play an irreplaceable role in fields such as construction, mining, petroleum, and military engineering.
[0003] In recent years, in order to improve the working efficiency of excavators, reduce the working intensity of operators, and enhance the intelligent level of excavators, each main engine factory has applied electronic control technology to excavators, gradually forming an intelligent control system for excavators. Due to its flexibility, wheeled excavators play an important role in the construction machinery field. Compared with crawler excavators, wheeled excavators need to add a hydraulic system for steering control. For some special application fields, different attachments need to be replaced, and the hydraulic system for driving the attachments to move is often operated through electromagnetic buttons. According to these functional requirements of wheeled excavators, corresponding oil source valves need to be set separately to achieve functions such as steering control, attachment electromagnetic control, and pilot oil source control. Multiple oil source valves are set independently, increasing the types of components and the complexity of the connecting pipelines, resulting in high costs. Therefore, there is an urgent need to design an oil source valve that can integrate steering control, attachment electromagnetic control, and pilot oil source control, reduce the types of components, and reduce costs. Content of the Utility Model
[0004] The purpose of the utility model is to provide an integrated oil source valve for a wheeled excavator to solve the problems existing in the above-mentioned prior art. It integrates the steering control, attachment electromagnetic control, and pilot oil source control valves, reduces the types of components, reduces the connection of pipelines, and reduces costs.
[0005] To achieve the above purpose, the utility model provides the following scheme:
[0006] The utility model provides an integrated oil source valve for a wheeled excavator, including:
[0007] A valve body, one end of which is provided with an oil inlet;
[0008] A steering control oil circuit, arranged in the valve body, one end of which is connected to the oil inlet, and the other end is used for connecting and driving the steering controller of the wheeled excavator;
[0009] The voltage-stabilizing drive oil circuit is arranged inside the valve body, with one end connected to the oil inlet and the other end connected to a two-position three-way solenoid valve. The oil outlet of the two-position three-way solenoid valve is connected to a pilot oil circuit and a main oil circuit through an oil outlet pipeline. The pilot oil circuit is connected to a pilot handle through the output end of a pilot oil source valve. The main oil circuit is connected to the oil inlets of at least two parallel three-position four-way solenoid valves, and the multiple oil outlets of the three-position four-way solenoid valves are respectively connected to multiple pilot ports of a multi-way valve one by one.
[0010] Optionally, a first pressure reducing valve is provided on the steering control oil circuit.
[0011] Optionally, the first pressure reducing valve can reduce the oil pressure delivered to the steering controller to 120 bar.
[0012] Optionally, a second pressure reducing valve, a check valve and an accumulator are sequentially provided on the voltage-stabilizing drive oil circuit, and the pressure oil in the voltage-stabilizing drive oil circuit is delivered to the oil inlet of the two-position three-way solenoid valve after passing through the second pressure reducing valve, the check valve and the accumulator.
[0013] Optionally, the pressure of the pressure oil in the voltage-stabilizing drive oil circuit is 35 bar after passing through the second pressure reducing valve, the check valve and the accumulator.
[0014] Optionally, a damping device is further included. The damping device is arranged on the voltage-stabilizing drive oil circuit, and the damping device is located at one end of the second pressure reducing valve away from the check valve.
[0015] Optionally, the voltage-stabilizing drive oil circuit is also connected with a relief valve. The oil inlet of the relief valve is connected to the voltage-stabilizing drive oil circuit between the second pressure reducing valve and the check valve, and the oil return port of the relief valve is respectively connected to the oil return port of the two-position three-way solenoid valve and the oil return port of the three-position four-way solenoid valve.
[0016] Optionally, the starting pressure of the relief valve is set to 45 bar.
[0017] The utility model has achieved the following technical effects compared with the prior art:
[0018] The oil source valve structure of the utility model integrates steering control and attachment electromagnetic control, reduces the types of components, reduces the pipeline connections, lowers the cost, and can respectively achieve the steering control of a wheeled excavator and the control of various attachments. Description of the Drawings
[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0020] Figure 1 Structural schematic diagram of the integrated oil source valve for the wheeled excavator of the present invention;
[0021] Figure 2 Principle schematic diagram of the integrated oil source valve for the wheeled excavator of the present invention.
[0022] In the figure: 1 - valve body, 2 - first pressure reducing valve, 3 - second pressure reducing valve, 4 - overflow valve, 5 - two-position three-way solenoid valve, 6 - three-position four-way solenoid valve, 7 - check valve, 8 - accumulator, 9 - damping device, 10 - oil inlet. Detailed implementation manners
[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.
[0024] The purpose of the present invention is to provide an integrated oil source valve for a wheeled excavator to solve the problems existing in the above-mentioned prior art. It integrates the steering control, attachment electromagnetic control, and pilot oil source control valve, reducing the types of components, reducing the pipeline connections, and lowering the cost.
[0025] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the drawings and specific implementation manners.
[0026] Reference Figure 1 and Figure 2As shown in the figure, the utility model provides an integrated oil source valve for a wheeled excavator, which includes a valve body 1. The valve body 1 is a sealed housing structure, and an oil inlet 10 is provided at one end thereof. A steering control oil circuit and a voltage stabilizing drive oil circuit are arranged in parallel in the valve body 1. One end of the steering control oil circuit is connected to the oil inlet 10, and the other end is used to connect and drive the steering controller of the wheeled excavator. The steering controller is a device for controlling the steering system of an automobile. It can adjust the steering force and direction of the steering gear according to the driver's operation and the driving state of the automobile. The steering controller is usually interconnected with the steering gear, sensors and other control systems to achieve precise steering control and efficient energy utilization. The steering controller of the present utility model adopts a hydraulic power steering controller, which provides assistance through a hydraulic system. It belongs to the prior art and will not be elaborated herein.
[0027] One end of the voltage stabilizing drive oil circuit is connected to the oil inlet, and the other end is connected with a two-position three-way solenoid valve 5. The oil outlet of the two-position three-way solenoid valve 5 is connected with a pilot oil circuit and a main oil circuit through an oil outlet pipeline. The pilot oil circuit is connected with a pilot handle through the output end of the pilot oil source valve. As a pilot hydraulic system, the pilot hydraulic system is an auxiliary hydraulic system for controlling the main hydraulic system in large hydraulic equipment. It controls the actions of large hydraulic valves or actuators in the main hydraulic system through relatively small pressure and flow rates, so as to achieve precise control of the entire hydraulic system. The pilot hydraulic system is widely used in heavy machinery such as excavators, loaders, and cranes. By operating the pilot handle, the pressure or flow rate of the pilot oil is adjusted, thereby controlling the actions of the pilot multi-way valve, and finally adjusting the pressure and flow rate of the main oil circuit, so as to control the actions of the actuator. During operation, the driver operates the pilot handle to change the pressure or flow rate of the pilot oil. The pilot oil is transmitted to the pilot multi-way valve through the pilot oil circuit. The pilot multi-way valve controls the pressure and flow rate of the main oil circuit according to the changes in the pressure or flow rate of the pilot oil. The changes in the pressure and flow rate of the main oil circuit cause the actions of the actuator to change.
[0028] The main oil circuit is connected to the oil inlets of at least two parallel three-position four-way solenoid valves 6. The multiple oil outlets of the three-position four-way solenoid valves 6 are respectively connected to the multiple pilot ports of the multi-way valve in one-to-one correspondence. Different pilot ports correspond to different attachments. An attachment refers to a tool or device attached to a mechanical equipment to complete specific tasks. These tools can be replaced according to different application requirements to adapt to various operating scenarios. Attachments are widely used in multiple fields such as construction machinery, agricultural machinery, and logistics handling equipment.
[0029] In order to achieve stable and reliable steering control, therefore, the present utility model is provided with a first pressure reducing valve 2 on the steering control oil circuit. The first pressure reducing valve 2 can reduce the oil pressure delivered to the steering controller to 120 bar. The pressure of the first pressure reducing valve 2 is adjustable and is used to drive the steering controller of the wheeled excavator.
[0030] Furthermore, in order to achieve stable and controllable oil pressure in the voltage-stabilizing drive oil circuit, a damping device 9, a second pressure reducing valve 3, a check valve 7, and an accumulator 8 are successively arranged on the voltage-stabilizing drive oil circuit. The pressurized oil in the voltage-stabilizing drive oil circuit is delivered to the oil inlet of the two-position three-way solenoid valve 5 after passing through the second pressure reducing valve 3, the check valve 7, and the accumulator 8. After the hydraulic oil in the voltage-stabilizing drive oil circuit successively passes through the damping device 9, the pressure reducing valve, the second check valve 7, and the accumulator 8, a stable pressure of 35 bar will be formed. The damping device 9 can reduce the pressure change at the liquid inlet of the valve body 1 and the fluctuations generated by the second pressure reducing valve 3, and the pressure of the second pressure reducing valve 3 can be adjusted. The damping device 9 belongs to the prior art and is a device for providing a damping effect. It can be a simple mechanical device or a complex electronic system, usually used to reduce vibrations, reduce the vibration amplitude by consuming vibration energy, improve safety, and reduce the risk of structural damage caused by vibrations.
[0031] In order to protect the oil circuit and related components from damage due to excessive oil pressure, an overflow valve 4 with a pressure set to 45 bar is connected to the voltage-stabilizing drive oil circuit in this utility model. The oil inlet of the overflow valve 4 is connected to the voltage-stabilizing drive oil circuit between the second pressure reducing valve 3 and the check valve 7. The oil return ports of the overflow valve 4 are respectively connected to the oil return port of the two-position three-way solenoid valve 5 and the oil return port of the three-position four-way solenoid valve 6, merged into a total oil return port T, and connected to the fuel tank. The overflow valve 4 is a hydraulic control valve used to regulate the pressure of the hydraulic system to ensure that the pressure in the system does not exceed a predetermined maximum value. When the pressure in the system exceeds the set value, the overflow valve 4 will open and discharge the excess hydraulic oil into the fuel tank, thereby protecting the system from overpressure damage. The overflow valve 4 is one of the most basic safety protection devices in the hydraulic system.
[0032] The first pressure reducing valve 2, the second pressure reducing valve 3, the overflow valve 4, the check valve 7, the accumulator 8, the two-position three-way solenoid valve 5, the three-position four-way solenoid valve 6, and the damping device 9 in this utility model are all installed on the valve body 1 by threaded connection and all have corresponding torque requirements.
[0033] As Figure 2As shown in the figure, the working principle of the present utility model is as follows: The oil inlet 10 of the valve body 1 is connected to the oil inlet end, and the oil entering the oil inlet 10 is divided into two paths; one path serves as the steering control oil path, which is reduced in pressure to 120 bar by the first pressure reducing valve 2. The pressure of the first pressure reducing valve 2 can be adjusted and is used to drive the steering controller of the wheeled excavator; the second path serves as the voltage stabilizing drive oil path, which is parallel to the steering control oil path. The second path will sequentially pass through the damping device 9, the second pressure reducing valve 3, the one-way valve 7, and the accumulator 8 to form a stable pressure of 35 bar. Among them, the damping device 9 can reduce the fluctuation generated by the change of the oil inlet pressure of the valve body 1 on the second pressure reducing valve 3. The pressure of the second pressure reducing valve 3 can be adjusted. An overflow valve 4 is connected in parallel in the second oil path, and the pressure is set at 45 bar to prevent instantaneous impact and protect the damage to the subsequent components caused by excessive pressure after the pressure reducing valve fails. The one-way valve 7 and the accumulator 8 have the functions of stabilizing pressure and reducing impact. The 35-bar pressure oil in the second path is connected to the oil inlet of the two-position three-way solenoid valve 5. After passing through the oil outlet of the two-position three-way solenoid valve 5, it is divided into two branches. The two-position three-way solenoid valve 5 has a safety function. After it is energized, it can output 35-bar pressure oil to the first branch and the second branch, otherwise it cannot work. The first branch serves as the pilot oil path, which is connected to the pilot handle through the output end BV of the pilot oil source valve and is used to drive the pilot multi-way valve to act. This process and principle are prior art, so no detailed description will be given here; the second branch serves as the main oil path and is connected to the oil inlet of the three-position four-way solenoid valve 6. In this embodiment, two three-position four-way solenoid valves 6 are taken as examples for illustration. One of the three-position four-way solenoid valves 6 has two working oil ports A1 and B1, and the other three-position four-way solenoid valve 6 has two working oil ports A2 and B2. The function of the three-position four-way solenoid valve 6 is of the Y type. By controlling the energization and de-energization of the three-position four-way solenoid valve 6 through current, it is controlled whether the four working oil ports A1, B1, A2, and B2 output 35-bar pressure oil. A1, B1, A2, and B2 are connected to the corresponding pilot ports of the multi-way valve, and different pilot ports correspond to different attachments, so as to control the corresponding attachments through electricity. The Y-type function is a kind of neutral position function of the three-position four-way solenoid valve 6, which defines the connection state of the oil ports when the solenoid valve is in the neutral position. The characteristic of the Y-type function is that when it is in the neutral position, it disconnects the oil inlet and the oil return port from the two working oil ports; when the three-position four-way solenoid valve 6 is not activated and is in the neutral position, the two working oil ports are disconnected from the oil inlet and the oil return port, and there is no pressure on both sides of the hydraulic cylinder, and the hydraulic cylinder returns to the initial position by relying on external force. When the corresponding electromagnetic button is operated to activate the three-position four-way solenoid valve 6, one of the working oil ports is connected to the oil inlet, and the other working oil port is connected to the oil return port, thereby driving the hydraulic cylinder to act and further controlling the corresponding attachment to work.
[0034] In this utility model, specific examples are used to expound the principle and implementation mode of the utility model. The description of the above embodiments is only used to help understand the method and its core idea of the utility model; at the same time, for those of ordinary skill in the art, according to the idea of the utility model, there will be changes in the specific implementation mode and application scope. To sum up, the content of this specification should not be construed as a limitation to the utility model.
Claims
1. An integrated oil source valve for a wheeled excavator, characterized in that: include: A valve body, one end of which is provided with an oil inlet; A steering control oil circuit is arranged in the valve body, one end of which is connected to the oil inlet, and the other end is used to connect to and drive a steering controller of the wheeled excavator; A voltage-stabilizing driving oil circuit is arranged in the valve body, one end of which is connected to the oil inlet, and the other end is connected to a two-position three-way solenoid valve, the oil outlet of the two-position three-way solenoid valve is connected to a pilot oil circuit and a main oil circuit through an oil outlet pipeline, the pilot oil circuit is connected to a pilot handle through the output end of a pilot oil source valve, the main oil circuit is connected to the oil inlets of at least two parallel three-position four-way solenoid valves, and the multiple oil outlets of the three-position four-way solenoid valves are respectively connected one-to-one with the multiple pilot ports of the multi-way valve.
2. The integrated oil source valve for a wheeled excavator according to claim 1, characterized in that: The steering control oil circuit is provided with a first pressure reducing valve.
3. The integrated oil source valve for a wheeled excavator according to claim 2, characterized in that: The first pressure reducing valve can reduce the oil pressure delivered to the steering controller to 120 bar.
4. The integrated oil source valve for a wheeled excavator according to claim 1, characterized in that: The pressure-stabilizing driving oil circuit is provided with a second pressure reducing valve, a one-way valve and an accumulator in sequence, and the pressure oil in the pressure-stabilizing driving oil circuit is transported to the oil inlet of the two-position three-way solenoid valve after passing through the second pressure reducing valve, the one-way valve and the accumulator.
5. The integrated oil source valve for a wheeled excavator according to claim 4, characterized in that: The pressure of the pressure oil in the pressure-stabilizing driving oil circuit is 35 bar after passing through the second pressure reducing valve, the one-way valve and the accumulator.
6. The integrated oil source valve for a wheeled excavator according to claim 4, characterized in that: It also includes a damping device, which is arranged on the pressure-stabilizing driving oil circuit, and is located at one end of the second pressure reducing valve away from the one-way valve.
7. The integrated oil source valve for a wheeled excavator according to claim 4, characterized in that: The pressure-stabilizing driving oil circuit is connected to a relief valve, the liquid inlet of the relief valve is connected to the pressure-stabilizing driving oil circuit located between the second pressure reducing valve and the one-way valve, and the oil return port of the relief valve is respectively connected to the oil return port of the two-position three-way solenoid valve and the oil return port of the three-position four-way solenoid valve.
8. The integrated oil source valve for a wheeled excavator according to claim 7, characterized in that: The starting pressure of the relief valve is set to 45 bar.