Hydraulic auxiliary function expanding system and excavator

Abstract

The utility model discloses a hydraulic auxiliary function expanding system and an excavator, the hydraulic auxiliary function expanding system comprises a pilot electromagnetic valve, a pilot handle, a main control valve, a two-position six-way electromagnetic valve, a main element and an auxiliary element, the pilot electromagnetic valve, the pilot handle, the main control valve and the two-position six-way electromagnetic valve are communicated in sequence; and the two-position six-way electromagnetic valve is respectively communicated with the main element and the auxiliary element. Through the arrangement of the two-position six-way electromagnetic valve, switching between power-on and power-off of the two-position six-way electromagnetic valve can achieve working switching of the main element and the auxiliary element, so that working systems of the two elements can be controlled only through cooperation of one pilot handle and the two-position six-way electromagnetic valve, an additional pilot handle does not need to be added, the structure is simple, and the cost is low. And the cost and the installation difficulty are greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of excavator technology, and in particular to a hydraulic auxiliary function expansion system and an excavator. Background Technology

[0002] Existing excavator functions, such as winch and travel, are typically designed in-house during excavator manufacturing. Adding new auxiliary functions, such as drilling, requires a completely redesigned hydraulic piping. In traditional excavators, the number of tasks a hydraulic excavator can perform depends primarily on the number of actuating valve groups in the main valve. Therefore, adding new auxiliary functions requires the main valve manufacturer to develop a new main valve. However, developing a new main valve takes a long time and cannot quickly respond to user needs. Furthermore, modifications to the main valve may affect the reliability and stability of the hydraulic system, necessitating extensive testing and verification, thus increasing time and cost.

[0003] Existing patent CN108999819A discloses a hydraulic auxiliary function expansion device, including a main valve assembly and a hydraulic cylinder, as well as auxiliary actuators, an auxiliary pilot valve for controlling the action of the auxiliary actuators, a hydraulic cylinder pilot valve for controlling the action of the hydraulic cylinder, a two-position multi-way valve for switching oil circuits, and a two-position four-way solenoid valve for simultaneously controlling the operation of the two-position multi-way valve and selectively supplying oil to the auxiliary pilot valve and the hydraulic cylinder pilot valve. The main valve assembly is connected to the two-position multi-way valve, which is connected to both the auxiliary actuator and the hydraulic cylinder. The two-position four-way solenoid valve is also connected to the two-position multi-way valve, which is connected to both the auxiliary pilot valve and the hydraulic cylinder pilot valve. The auxiliary pilot valve and the hydraulic cylinder pilot valve are connected to the main valve assembly. This device can quickly add new auxiliary functions to a hydraulic excavator according to user and working conditions without changing the structure and function of the main valve, thus solving the problem of difficulty in adding auxiliary functions to hydraulic excavators. It features reliable performance, convenient operation, and high cost-effectiveness.

[0004] However, for each additional hydraulic auxiliary function expansion device, a corresponding pilot control valve needs to be added, which in turn requires setting up an installation position in the excavator cab. This not only takes up space but also makes operation difficult, time-consuming, and significantly increases costs. Utility Model Content

[0005] In order to overcome at least one of the defects described in the prior art, the purpose of this utility model is to provide a hydraulic auxiliary function expansion system and excavator, which can increase auxiliary functions by cooperating with a pilot handle and a two-position six-way solenoid valve, without the need to add an additional pilot handle, thereby reducing cost and installation difficulty.

[0006] The technical solution adopted by this utility model to solve its problem is:

[0007] A hydraulic auxiliary function expansion system includes: a pilot solenoid valve, a pilot handle, a main control valve, a two-position six-way solenoid valve, a main component, and an auxiliary component. The pilot solenoid valve, the pilot handle, the main control valve, and the two-position six-way solenoid valve are connected in sequence, and the two-position six-way solenoid valve is connected to the main component and the auxiliary component respectively.

[0008] In a preferred embodiment of this invention, the main control valve is supplied with oil via an oil tank, which is connected to the main control valve via a main pump.

[0009] In a preferred embodiment of this invention, the pilot handle is supplied with oil via an oil tank, which is connected to the pilot handle via a pilot pump and a pilot solenoid valve.

[0010] In a preferred embodiment of this invention, a filter is provided in the oil line between the pilot pump and the pilot solenoid valve.

[0011] In a preferred embodiment, in this invention, the main pump, pilot pump, pilot solenoid valve, pilot handle, and the drain port of the main control valve are all connected to the oil tank.

[0012] In a preferred embodiment, the main pump has a first overflow valve on its drain line and the pilot pump has a second overflow valve on its drain line.

[0013] In a preferred embodiment, the auxiliary component in this invention is a motor component, and the oil port of the motor component is connected to the pilot solenoid valve through a high-low speed switching valve.

[0014] In a preferred embodiment of this invention, the drain port of the high-low speed switching valve is connected to the oil tank.

[0015] In a preferred embodiment, both the two-position six-way solenoid valve and the high-low speed switching valve in this invention are connected to a rocker switch, which is used to control the on / off state of the corresponding two-position six-way solenoid valve or high-low speed switching valve.

[0016] An excavator includes: the aforementioned hydraulic auxiliary function expansion system.

[0017] The beneficial effects of the hydraulic auxiliary function expansion system and excavator provided by this utility model are as follows:

[0018] The two-position six-way solenoid valve allows for switching between the operation of the main component and the auxiliary component by switching between power on and off. Thus, only one pilot handle is needed to control the working system of two components, eliminating the need for an additional pilot handle. This not only simplifies the structure but also greatly reduces costs and installation difficulty. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the hydraulic auxiliary function expansion system of this utility model.

[0020] The meanings of the reference numerals in the attached figures are as follows:

[0021] 1. Main pump; 2. Pilot pump; 3. First relief valve; 4. Filter; 5. Pilot solenoid valve; 6. Second relief valve; 7. Pilot handle; 8. Main control valve; 9. Two-position six-way solenoid valve; 10. Main components; 11. High and low speed switching valve; 12. Auxiliary components; 13. Oil tank. Detailed Implementation

[0022] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0023] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0025] See Figure 1 This utility model provides a hydraulic auxiliary function expansion system, including: pilot solenoid valve 5, pilot handle 7, main control valve 8, two-position six-way solenoid valve 9, main component 10 and auxiliary component 12. The pilot solenoid valve 5, pilot handle 7, main control valve 8 and two-position six-way solenoid valve 9 are connected in sequence. The two-position six-way solenoid valve 9 is connected to the main component 10 and auxiliary component 12 respectively.

[0026] This hydraulic auxiliary function expansion system is applied to excavators. Specifically, this invention provides an excavator including the aforementioned hydraulic auxiliary function expansion system. The main component 10 can be a bulldozer blade cylinder, outrigger cylinder, etc., and the auxiliary component 12 can be a drilling drive, winch motor, etc. Based on this, the functional control principle is as follows:

[0027] When pilot solenoid valve 5 is energized and 2-position 6-way solenoid valve 9 is de-energized, the hydraulic circuit between main component 10 and main control valve 8 is connected. Supplying oil to pilot handle 7 causes the valve core of main control valve 8 to move. Hydraulic oil then flows through main control valve 8 and 2-position 6-way solenoid valve 9 to main component 10, driving its operation. Manually controlling pilot handle 7 controls the valve core reversal of main control valve 8, thereby controlling the switching of the operating direction of main component 10, such as switching the direction of outrigger cylinders.

[0028] Both the pilot solenoid valve 5 and the 2-position 6-way solenoid valve 9 are energized. The auxiliary component 12 is connected to the oil circuit of the main control valve 8. Supplying oil to the pilot handle 7 causes the valve core of the main control valve 8 to move. Thus, hydraulic oil flows through the main control valve 8 and the 2-position 6-way solenoid valve 9 to the auxiliary component 12, driving the auxiliary component 12 to move. Manually controlling the pilot handle 7 can control the valve core of the main control valve 8 to change direction, thereby controlling the switching of the direction of movement of the auxiliary component 12, such as changing the rotation direction of a motor.

[0029] Thus, the two-position six-way solenoid valve 9 can switch between the operation of the main component 10 and the auxiliary component 12 by switching its power on and off. Therefore, only one pilot handle 7 is needed to cooperate with the two-position six-way solenoid valve 9 to control the working system of the two components. There is no need to add an extra pilot handle 7. This not only simplifies the structure, but also greatly reduces the cost and installation difficulty.

[0030] Specifically, the main control valve 8 is supplied with oil via the oil tank 13, which is connected to the main control valve 8 via the main pump 1. After the pilot handle 7 controls the valve core of the main control valve 8 to move, the main pump 1 draws hydraulic oil from the oil tank 13 to supply oil to the main control valve 8. This allows the oil circuit between the main control valve 8 and the main component 10 or auxiliary component 12 to be connected by switching the energization of the two-position six-way solenoid valve 9, thereby controlling the operation of the main component 10 or auxiliary component 12.

[0031] The pilot handle 7 is supplied with oil via the oil tank 13, which is connected to the pilot handle 7 via the pilot pump 2 and the pilot solenoid valve 5. The pilot pump 2 draws hydraulic oil from the oil tank 13 and supplies oil to the pilot handle 7 via the pilot solenoid valve 5. Thus, manually controlling the pilot handle 7 can move the valve core of the main control valve 8, facilitating the connection of the oil circuit between the main control valve 8 and the main component 10 or auxiliary component 12 after oil is supplied to the main control valve 8.

[0032] Based on this, the control principle of this function is as follows:

[0033] When pilot solenoid valve 5 is energized and 2-position 6-way solenoid valve 9 is de-energized, the oil circuit between main component 10 and main control valve 8 is connected. Pilot pump 2 draws hydraulic oil and supplies it to pilot handle 7 via pilot solenoid valve 5, allowing manual control of pilot handle 7 to move the valve core of main control valve 8. At this time, main pump 1 draws hydraulic oil and flows to main component 10 via main control valve 8 and 2-position 6-way solenoid valve 9 to drive main component 10 to operate. Manually controlling pilot handle 7 can control the valve core reversal of main control valve 8, thereby controlling the switching of the operating direction of main component 10, such as switching the direction of outrigger cylinders.

[0034] Both the pilot solenoid valve 5 and the 2-position 6-way solenoid valve 9 are energized, and the auxiliary component 12 is connected to the oil circuit of the main control valve 8. The pilot pump 2 draws hydraulic oil and supplies it to the pilot handle 7 via the pilot solenoid valve 5, allowing manual control of the pilot handle 7 to move the valve core of the main control valve 8. At this time, the main pump 1 draws hydraulic oil and flows to the auxiliary component 12 via the main control valve 8 and the 2-position 6-way solenoid valve 9 to drive the auxiliary component 12 to operate. Manually controlling the pilot handle 7 can control the valve core reversal of the main control valve 8, thereby controlling the switching of the operating direction of the auxiliary component 12, such as switching the rotation direction of a motor.

[0035] Based on the above structure, a filter 4 is installed in the oil circuit between the pilot pump 2 and the pilot solenoid valve 5. The filter 4 is used to filter impurities in the hydraulic oil to prevent damage to the pilot solenoid valve 5, thereby effectively reducing costs.

[0036] The drain ports of the main pump 1, pilot pump 2, pilot solenoid valve 5, pilot handle 7, and main control valve 8 are all connected to the oil tank 13. The drain circuit facilitates the recovery and reuse of hydraulic oil, effectively controls pressure, saves costs, and ensures system safety.

[0037] The main pump 1 is equipped with a first relief valve 3 on its drain line, and the pilot pump 2 is equipped with a second relief valve 6 on its drain line. The first relief valve 3 and the second relief valve 6 have the function of relieving pressure, thereby ensuring the safe operation of the main pump 1 and the pilot pump 2.

[0038] In addition, the auxiliary component 12 of this utility model is a motor component, and the oil port of the motor component is connected to the pilot solenoid valve 5 through the high-low speed switching valve 11. When the motor component is working, the switching between energizing and de-energizing the high-low speed switching valve 11 can realize the switching between high and low speed rotation of the motor component, thereby adjusting the speed according to the actual working conditions to improve applicability.

[0039] Both the two-position six-way solenoid valve 9 and the high-low speed switching valve 11 are connected to rocker switches. The rocker switches are used to control the on / off state of the electromagnet SV1 on the corresponding two-position six-way solenoid valve 9 or the electromagnet SV2 on the high-low speed switching valve 11.

[0040] Based on this, combined Figure 1 According to Table 1 below, the control principle of this function is as follows:

[0041] When pilot solenoid valve 5 is energized and 2-position 6-way solenoid valve 9 is de-energized, the oil circuit between main component 10 and main control valve 8 is connected. Pilot pump 2 draws hydraulic oil and supplies it to pilot handle 7 via pilot solenoid valve 5, allowing manual control of pilot handle 7 to move the valve core of main control valve 8. At this time, main pump 1 draws hydraulic oil and flows to main component 10 via main control valve 8 and 2-position 6-way solenoid valve 9 to drive main component 10 to operate. Manually controlling pilot handle 7 can control the valve core reversal of main control valve 8, thereby controlling the switching of the operating direction of main component 10, such as switching the direction of outrigger cylinders.

[0042] Both the pilot solenoid valve 5 and the 2-position 6-way solenoid valve 9 are energized, while the high / low speed switching valve 11 is de-energized. The auxiliary component 12, i.e., the motor component, is connected to the main control valve 8 via the oil circuit. The pilot pump 2 draws hydraulic oil, which is supplied to the pilot handle 7 via the pilot solenoid valve 5, allowing manual control of the pilot handle 7 to move the valve core of the main control valve 8. At this time, the main pump 1 draws hydraulic oil, which flows to the motor component via the main control valve 8 and the 2-position 6-way solenoid valve 9, driving the motor component to rotate at low speed. Manually controlling the pilot handle 7 controls the valve core reversal of the main control valve 8, thereby controlling the switching of the motor component's rotation direction.

[0043] Pilot solenoid valve 5, 2-position 6-way solenoid valve 9, and high / low speed switching valve 11 are all energized. Auxiliary component 12, i.e., the motor component, is connected to the main control valve 8 via its oil circuit. Pilot pump 2 draws hydraulic oil, which is supplied to pilot handle 7 via pilot solenoid valve 5, allowing manual control of pilot handle 7 to move the valve core of main control valve 8. At this time, hydraulic oil drawn by main pump 1 flows to the motor component via main control valve 8 and 2-position 6-way solenoid valve 9. Pilot solenoid valve 5 is connected to the oil port of the motor component via high / low speed switching valve 11, allowing pilot pressure oil to flow to the motor component to drive its high-speed rotation. Manually controlling pilot handle 7 controls the valve core reversal of main control valve 8, thereby controlling the rotation direction of the motor component.

[0044] The drain port of the high / low speed switching valve 11 is connected to the oil tank 13. The drain circuit facilitates the recovery and reuse of hydraulic oil, effectively controls pressure, saves costs, and ensures system safety.

[0045] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A hydraulic auxiliary function expansion system, characterized in that, include: The system includes a pilot solenoid valve, a pilot handle, a main control valve, a two-position six-way solenoid valve, a main component, and an auxiliary component. The pilot solenoid valve, the pilot handle, the main control valve, and the two-position six-way solenoid valve are connected in sequence. The two-position six-way solenoid valve is connected to the main component and the auxiliary component, respectively.

2. The hydraulic auxiliary function expansion system according to claim 1, characterized in that: The main control valve is supplied with oil via an oil tank, which is connected to the main control valve via a main pump.

3. The hydraulic auxiliary function expansion system according to claim 2, characterized in that: The pilot handle is supplied with oil via the oil tank, and the oil tank is connected to the pilot handle via the pilot pump and the pilot solenoid valve.

4. The hydraulic auxiliary function expansion system according to claim 3, characterized in that: A filter is provided in the oil line between the pilot pump and the pilot solenoid valve.

5. The hydraulic auxiliary function expansion system according to claim 3, characterized in that: The main pump, the pilot pump, the pilot solenoid valve, the pilot handle, and the drain port of the main control valve are all connected to the oil tank.

6. The hydraulic auxiliary function expansion system according to claim 5, characterized in that: The main pump is equipped with a first overflow valve on its drain line, and the pilot pump is equipped with a second overflow valve on its drain line.

7. The hydraulic auxiliary function expansion system according to claim 3, characterized in that: The auxiliary component is a motor component, and the oil port of the motor component is connected to the pilot solenoid valve through a high-low speed switching valve.

8. The hydraulic auxiliary function expansion system according to claim 7, characterized in that: The drain port of the high-low speed switching valve is connected to the oil tank.

9. The hydraulic auxiliary function expansion system according to claim 7, characterized in that: Both the two-position six-way solenoid valve and the high-low speed switching valve are connected to a rocker switch, which is used to control the on / off state of the corresponding two-position six-way solenoid valve or the high-low speed switching valve.

10. An excavator, characterized in that, include: The hydraulic auxiliary function expansion system according to any one of claims 1-9.

Images