CN218439971U - Hydraulic control system and working machine - Google Patents
Hydraulic control system and working machine Download PDFInfo
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- CN218439971U CN218439971U CN202222564606.0U CN202222564606U CN218439971U CN 218439971 U CN218439971 U CN 218439971U CN 202222564606 U CN202222564606 U CN 202222564606U CN 218439971 U CN218439971 U CN 218439971U
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Abstract
The utility model relates to a hydraulic system technical field provides a hydraulic control system and operation machinery. The hydraulic control system comprises an electric control unit, a hydraulic control unit, a switching assembly, a control oil source and a main valve. The main valve comprises a control oil port. One side of the electric control unit is connected with the control oil source, and the other side of the electric control unit is connected with the control oil port through the switching assembly. One side of the hydraulic control unit is connected with the control oil source, and the other side of the hydraulic control unit is connected with the control oil port through the switching assembly. The switching assembly is used for enabling the control oil source to be communicated with the control oil port through one of the electric control unit and the hydraulic control unit. The control mode of the working state of the main valve can be flexibly adjusted by an operator according to actual requirements. When one control mode is failed, the other control mode can still control the working state of the main valve. Therefore, the control flexibility and reliability of the hydraulic control system are greatly improved.
Description
Technical Field
The utility model relates to a hydraulic system technical field especially relates to a hydraulic control system and operation machinery.
Background
A hydraulic control system for a construction machine generally includes an actuator and a main control valve for controlling an operation state of the actuator. In the existing hydraulic control system, an electric control unit or a hydraulic control unit is usually configured to adjust the working state of a main control valve, and when the electric control unit or the hydraulic control unit configured to adjust the working state of the main control valve fails, the working state of the main control valve cannot be adjusted, which affects the normal operation of the whole hydraulic control system. The control flexibility and reliability of the working state of the main valve of the hydraulic control system are poor.
SUMMERY OF THE UTILITY MODEL
The utility model provides a hydraulic control system and operation machinery for solve the relatively poor problem of control flexibility and reliability of main valve operating condition among the current hydraulic control system.
According to the utility model discloses an aspect provides a hydraulic control system, include: the device comprises an electric control unit, a hydraulic control unit, a switching assembly, a control oil source and a main valve.
Wherein the main valve includes a control port. One side of the electric control unit is connected with the control oil source, and the other side of the electric control unit is connected with the control oil port through the switching assembly. One side of the hydraulic control unit is connected with the control oil source, and the other side of the hydraulic control unit is connected with the control oil port through the switching assembly.
The switching assembly is used for enabling the control oil source to be communicated with the control oil port through one of the electric control unit and the hydraulic control unit.
According to the utility model provides a pair of hydraulic control system, control the hydraulic fluid port and include first control hydraulic fluid port and second control hydraulic fluid port. The electronic control unit comprises a first electromagnetic valve and a second electromagnetic valve. The pilot-controlled unit includes a first pilot-controlled valve and a second pilot-controlled valve.
One side of the first electromagnetic valve is connected with the control oil source, and the other side of the first electromagnetic valve is connected with the first control oil port through the switching assembly. One side of the second electromagnetic valve is connected with the control oil source, and the other side of the second electromagnetic valve is connected with the second control oil port through the switching assembly.
One side of the first hydraulic control valve is connected with the control oil source, and the other side of the first hydraulic control valve is connected with the first control oil port through the switching assembly. One side of the second hydraulic control valve is connected with the control oil source, and the other side of the second hydraulic control valve is connected with the second control oil port through the switching assembly.
According to the utility model provides a pair of hydraulic control system, the switching module includes first shuttle valve and second shuttle valve. The first shuttle valve comprises a first oil inlet, a second oil inlet and a first oil outlet. The second shuttle valve comprises a third oil inlet, a fourth oil inlet and a second oil outlet.
One side of the first electromagnetic valve is connected with the first oil inlet, one side of the first hydraulic control valve is connected with the second oil inlet, and the first oil outlet is connected with the first control oil port. One side of the second electromagnetic valve is connected with the third oil inlet, one side of the second hydraulic control valve is connected with the fourth oil inlet, and the second oil outlet is connected with the second control oil port.
According to the utility model provides a pair of hydraulic control system, the control oil source includes the pilot control oil circuit and controls back oil circuit. The other side of the first electromagnetic valve, the other side of the second electromagnetic valve, the other side of the first hydraulic control valve and the other side of the second hydraulic control valve are respectively connected with the pilot control oil way and the control oil return way.
According to the utility model provides a pair of hydraulic control system, first solenoid valve includes first electric control position and first automatically controlled stop position. The second solenoid valve includes a second electrically controlled position and a second electrically controlled shut-off position.
In the state of the first electric control position, the pilot control oil way is communicated with the first control oil port through the first electromagnetic valve and the first shuttle valve;
under the state of the first electric control cut-off position, the control oil return path is communicated with the first electromagnetic valve, and the first electromagnetic valve is cut off from the first control oil port through the first shuttle valve;
in the state of the second electric control position, the pilot control oil path is communicated with the second control oil port through the second electromagnetic valve and the second shuttle valve;
and in the state of the second electric control stop position, the control oil return path is communicated with the second electromagnetic valve, and the second electromagnetic valve is stopped from the second control oil port through the second shuttle valve.
According to the utility model provides a pair of hydraulic control system, first liquid accuse valve includes first liquid accuse position and first liquid accuse stop position. The second hydraulic valve includes a second hydraulic position and a second hydraulic shut-off position.
In the state of the first hydraulic control position, the pilot control oil path is communicated with the first control oil port through the first hydraulic control valve and the first shuttle valve;
in the state of the first hydraulic control stopping position, the control oil return path is communicated with the first hydraulic control valve, and the first hydraulic control valve is stopped from the first control oil port through the first shuttle valve;
in the state of the second hydraulic control level, the pilot control oil path is communicated with the second control oil port through the second hydraulic control valve and the second shuttle valve;
and in the state of the second hydraulic control cut-off position, the control oil return path is communicated with the second hydraulic control valve, and the second hydraulic control valve is cut off from the second control oil port through the second shuttle valve.
According to the utility model provides a pair of hydraulic control system, first solenoid valve with the second solenoid valve all includes two tee bend solenoid directional valves. The first hydraulic control valve and the second hydraulic control valve both comprise two-position three-way manual reversing valves.
According to the utility model provides a pair of hydraulic control system, the electrical unit still includes controlling means. The control device is connected with the first electromagnetic valve and the second electromagnetic valve and is used for respectively controlling the working positions of the first electromagnetic valve and the second electromagnetic valve.
The hydraulic control unit further comprises an operating handle. The operating handle is connected with the first hydraulic control valve and the second hydraulic control valve and is used for respectively controlling the working positions of the first hydraulic control valve and the second hydraulic control valve.
According to the utility model provides a pair of hydraulic control system, hydraulic control system still includes final controlling element, hydraulic pump and oil tank. One side of the main valve is connected with the hydraulic pump and the oil tank, and the other side of the main valve is connected with the execution device.
According to a second aspect of the present invention, there is provided a work machine comprising a hydraulic control system as described above.
The utility model provides an among the hydraulic control system, the main valve is including controlling the hydraulic fluid port. The control oil port is used for switching the working state of the main valve. The main valve is switched to different working states, and can drive an execution device of the hydraulic control system to execute different actions. The electric control unit and the hydraulic control unit are connected with a control oil source, and are respectively connected with a control oil port of the main valve through the switching assembly. Therefore, when the working state of the main valve needs to be switched through the hydraulic control unit, the switching assembly enables the hydraulic control unit to be communicated with the control oil port of the main valve, so that the control oil source flows to the control oil port of the main valve through the hydraulic control unit and the switching assembly, and the working state of the main valve is switched. When the working state of the main valve needs to be switched through the electric control unit, the switching assembly enables the electric control unit to be communicated with the control oil port of the main valve, so that the control oil source flows to the control oil port of the main valve through the electric control unit and the switching assembly, and the working state of the main valve is switched.
Through the structure, the electric control unit and the hydraulic control unit are arranged in the hydraulic system at the same time, and are connected with the control oil port of the main valve through the switching assembly. The control mode of the working state of the main valve can be flexibly adjusted by an operator according to actual requirements. Meanwhile, when one control mode is failed, the other control mode can be used for controlling the working state of the main valve so as to ensure the normal operation of the hydraulic control system. Therefore, the control flexibility and reliability of the hydraulic control system are greatly improved.
Further, since the working machine comprises the hydraulic control system as described above, it also has the advantages as described above.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a first schematic diagram of a hydraulic control system provided by the present invention, in which a control device is not shown;
fig. 2 is a second schematic diagram of the hydraulic control system provided by the present invention, wherein the operating handle is not shown;
reference numerals:
100. an electronic control unit; 101. a first solenoid valve; 102. a second solenoid valve; 200. a hydraulic control unit; 201. a first hydraulic control valve; 202. a second hydraulic control valve; 301. a first shuttle valve; 302. a first oil inlet; 303. a second oil inlet; 304. a first oil outlet; 305. a second shuttle valve; 306. a third oil inlet; 307. a fourth oil inlet; 308. a second oil outlet; 401. a pilot control oil path; 402. controlling an oil return path; 500. a main valve; 501. a first control oil port; 502. a second control oil port; 600. a control device; 700. an operating handle; 800. an execution device; 901. a hydraulic pump; 902. and an oil tank.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the embodiments of the present invention can be understood in specific cases by those skilled in the art.
In embodiments of the invention, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "above," and "over" a second feature may mean that the first feature is directly above or obliquely above the second feature, or that only the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, without mutual contradiction, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification to make the objects, technical solutions, and advantages of the embodiments of the present invention clearer, and the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The following describes a hydraulic control system and a working machine according to an embodiment of the present invention with reference to fig. 1 and 2. It should be understood that the following description is only exemplary of the present invention and does not constitute any particular limitation of the present invention.
An embodiment of the first aspect of the present invention provides a hydraulic control system, as shown in fig. 1 and fig. 2, the hydraulic control system includes: an electronic control unit 100, a pilot control unit 200, a switching assembly, a pilot oil source, and a main valve 500.
Wherein the main valve 500 includes a control port. One side of the electronic control unit 100 is connected to a control oil source. The other side of the electronic control unit 100 is connected with the control oil port through a switching assembly. One side of the hydraulic control unit 200 is connected to the control oil source, and the other side of the hydraulic control unit 200 is connected to the control oil port through the switching assembly.
The switching assembly is used for communicating the pilot oil source with the pilot oil port through one of the electronic control unit 100 and the pilot control unit 200, so that the operating state of the pilot main valve 500 is switched by the electronic control unit 100 or the pilot control unit 200.
The utility model provides an among the hydraulic control system, main valve 500 includes the control hydraulic fluid port. The control port is used to switch the operating state of the main valve 500. The main valve 500 is switched to different operating states, and can drive the actuator 800 of the hydraulic control system to perform different operations. The electric control unit 100 and the hydraulic control unit 200 are both connected to the control oil source, and the electric control unit 100 and the hydraulic control unit 200 are respectively connected to the control oil port of the main valve 500 through the switching assembly. Thus, when the operating state of the main valve 500 needs to be switched by the pilot unit 200, the switching element connects the pilot unit 200 with the pilot port of the main valve 500, so that the pilot oil source flows through the pilot unit 200 and the switching element to the pilot port of the main valve 500, thereby switching the operating state of the main valve 500. When the operation state of the main valve 500 needs to be switched by the electronic control unit 100, the switching component connects the electronic control unit 100 with the control oil port of the main valve 500, so that the control oil source flows to the control oil port of the main valve 500 through the electronic control unit 100 and the switching component, and the operation state of the main valve 500 is switched.
With this configuration, the electronic control unit 100 and the pilot control unit 200 are simultaneously disposed in the hydraulic system, and the electronic control unit 100 and the pilot control unit 200 are connected to the pilot port of the main valve 500 through the switching assembly. The operator can flexibly adjust the control mode of the working state of the main valve 500 according to the actual requirement. Meanwhile, when one of the control modes fails, the other control mode can be used for controlling the working state of the main valve 500 so as to ensure the normal operation of the hydraulic control system. Therefore, the control flexibility and reliability of the hydraulic control system are greatly improved.
In an embodiment of the present invention, the control oil port includes a first control oil port 501 and a second control oil port 502. The electronic control unit 100 comprises a first solenoid valve 101 and a second solenoid valve 102. The pilot control unit 200 includes a first pilot control valve 201 and a second pilot control valve 202.
One side of the first solenoid valve 101 is connected to a control oil source, and the other side of the first solenoid valve 101 is connected to the first control oil port 501 through a switching assembly. One side of the second solenoid valve 102 is connected to the control oil source, and the other side of the second solenoid valve 102 is connected to the second control oil port 502 through the switching assembly.
One side of the first hydraulic control valve 201 is connected to a control oil source, and the other side of the first hydraulic control valve 201 is connected to the first control oil port 501 through a switching assembly. One side of the second hydraulic valve 202 is connected to the control oil source, and the other side of the second hydraulic valve 202 is connected to the second control oil port 502 through the switching component.
Further, in one embodiment of the present invention, the switching assembly includes a first shuttle valve 301 and a second shuttle valve 305. The first shuttle valve 301 includes a first oil inlet 302, a second oil inlet 303, and a first oil outlet 304. The second shuttle valve 305 includes a third oil inlet 306, a fourth oil inlet 307, and a second oil outlet 308.
One side of the first solenoid valve 101 is connected to the first oil inlet 302, one side of the first hydraulic control valve 201 is connected to the second oil inlet 303, and the first oil outlet 304 is connected to the first control oil port 501. One side of the second solenoid valve 102 is connected to the third oil inlet 306, one side of the second hydraulic control valve 202 is connected to the fourth oil inlet 307, and the second oil outlet 308 is connected to the second control oil inlet 502.
Further, in an embodiment of the present invention, the control oil source includes a pilot oil path 401 and a control oil return path 402. The other side of the first solenoid valve 101, the other side of the second solenoid valve 102, the other side of the first pilot control valve 201, and the other side of the second pilot control valve 202 are connected to a pilot control oil passage 401 and a control oil return passage 402, respectively.
Specifically, as shown in fig. 1 and 2, the electronic control unit 100 includes a first solenoid valve 101 and a second solenoid valve 102. Pilot control unit 200 includes a first pilot control valve 201 and a second pilot control valve 202. In this embodiment, the first solenoid valve 101 and the second solenoid valve 102 each include a two-position three-way electromagnetic directional valve. The first hydraulic control valve 201 and the second hydraulic control valve 202 each include a two-position three-way manual directional valve.
Two oil ports on one side of the first solenoid valve 101 are respectively connected with the pilot control oil path 401 and the control oil return path 402, and the oil port on the other side of the first solenoid valve 101 is connected with the first control oil port 501 of the main valve 500 through the first oil inlet 302 and the first oil outlet 304 of the first shuttle valve 301. Two oil ports on one side of the second solenoid valve 102 are respectively connected to the pilot control oil path 401 and the control oil return path 402, and the oil port on the other side of the second solenoid valve 102 is connected to the second control oil port 502 of the main valve 500 through the third oil inlet 306 and the second oil outlet 308 of the second shuttle valve 305.
Two oil ports on one side of the first hydraulic control valve 201 are respectively connected with the pilot control oil path 401 and the control oil return path 402, and the oil port on the other side of the first hydraulic control valve 201 is connected with the first control oil port 501 of the main valve 500 through the second oil inlet 303 and the first oil outlet 304 of the first shuttle valve 301. Two oil ports on one side of the second hydraulic control valve 202 are respectively connected with the pilot control oil path 401 and the control oil return path 402, and the oil port on the other side of the second hydraulic control valve 202 is connected with the second control oil port 502 of the main valve 500 through the fourth oil inlet 307 and the second oil outlet 308 of the second shuttle valve 305.
In one embodiment of the present invention, the first solenoid valve 101 comprises a first electrically controlled position and a first electrically controlled stop position, the second solenoid valve 102 comprises a second electrically controlled position and a second electrically controlled stop position,
in the first electrical control position state, the pilot control oil path 401 is communicated with the first control oil port 501 through the first electromagnetic valve 101 and the first shuttle valve 301;
in the state of the first electric control cut-off position, the oil return control path 402 is communicated with the first electromagnetic valve 101, and the first electromagnetic valve 101 is cut off from the first control oil port 501 through the first shuttle valve 301;
in the second electrical control position state, the pilot control oil passage 401 is communicated with the second control oil port 502 through the second solenoid valve 102 and the second shuttle valve 305;
in the second electrical control stop position, the control return path 402 communicates with the second solenoid valve 102, and the second solenoid valve 102 is closed by the second shuttle valve 305 and the second control port 502.
In one embodiment of the present invention, the first hydraulic control valve includes a first hydraulic control position and a first hydraulic control cutoff position. The second hydraulic valve 202 includes a second hydraulic position and a second hydraulic shut-off position.
In the state of the first hydraulic control level, the pilot control oil path 401 is communicated with the first control oil port 501 through the first hydraulic control valve 201 and the first shuttle valve 301;
in the state of the first hydraulic control stop position, the control oil return path 402 is communicated with the first hydraulic control valve 201, and the first hydraulic control valve 201 is stopped from the first control oil port 501 through the first shuttle valve 301;
in the second hydraulic control level state, the pilot control oil passage 401 communicates with the second control oil port 502 through the second hydraulic control valve 202 and the second shuttle valve 305;
in the second pilot-off position, the pilot return line 402 is communicated with the second pilot valve 202, and the second pilot valve 202 is shut off from the second pilot port 502 by the second shuttle valve 305.
Specifically, as shown in fig. 1 and 2, for example, the main valve 500 comprises a three-position, four-way reversing valve. The left control port of the main valve 500 is a first control port 501, and the right control port of the main valve 500 is a second control port 502. When the first control port 501 is filled with oil and the second control port 502 is not filled with oil, the main valve 500 is switched to the left position; when the first control port 501 is not filled with oil and the second control port 502 is filled with oil, the main valve 500 is switched to the right position. When the first control oil port 501 and the second control oil port 502 are simultaneously or not simultaneously communicated with oil, the main valve 500 is kept at the middle position.
In a specific operation, when the operation position of the main valve 500 needs to be electrically controlled and adjusted, the first manual valve is maintained at the first hydraulic control cut-off position, and the second manual valve is maintained at the second hydraulic control cut-off position. By adjusting the operating positions of the first solenoid valve 101 and the second solenoid valve 102, the main valve 500 can be switched to the operating state. For example, when the first solenoid valve 101 is switched to the first electrical control position and the second solenoid valve 102 is maintained at the second electrical control stop position, the oil in the pilot oil path 401 flows to the first control oil port 501 of the main valve 500 through the first solenoid valve 101, the first oil inlet 302 and the first oil outlet 304 of the first shuttle valve 301, so that the main valve 500 is switched to the left position. When the first solenoid valve 101 is switched to the first electrical control stop position and the second solenoid valve 102 is switched to the second electrical control position, the oil in the pilot control oil path 401 flows to the second control oil port 502 of the main valve 500 through the second solenoid valve 102, the third oil inlet 306 and the second oil outlet 308 of the second shuttle valve 305, so that the main valve 500 is switched to the right position.
When the operating position of the main valve 500 needs to be adjusted by manual control, the first solenoid valve 101 is kept at the first electric control stop position, and the second solenoid valve 102 is kept at the second electric control stop position. The main valve 500 can be switched between the operating states by adjusting the operating positions of the first pilot valve 201 and the second pilot valve 202. For example, when the first pilot control valve 201 is switched to the first pilot control level and the second pilot control valve 202 is maintained at the second pilot stop level, the oil in the pilot control oil path 401 flows to the first control oil port 501 of the main valve 500 through the first pilot control valve 201, the second oil inlet 303 of the first shuttle valve 301 and the first oil outlet 304, so that the main valve 500 is switched to the left level. When the first pilot control valve 201 is switched to the first pilot stop position and the second pilot control valve 202 is switched to the second pilot position, the oil in the pilot control oil path 401 flows to the second control oil port 502 of the main valve 500 through the second pilot control valve 202, the fourth oil inlet 307 and the second oil outlet 308 of the second shuttle valve 305, so that the main valve 500 is switched to the right position.
In an embodiment of the present invention, the electronic control unit 100 further includes a control device 600. The control device 600 is connected to the first solenoid valve 101 and the second solenoid valve 102, and is used for controlling the operating positions of the first solenoid valve 101 and the second solenoid valve 102, respectively.
The pilot-operated unit 200 further includes an operating handle 700. The operating handle 700 is connected to the first pilot valve 201 and the second pilot valve 202 and is used to control the operating positions of the first pilot valve 201 and the second pilot valve 202, respectively.
For example, as shown in fig. 1 and 2, the electronic control unit 100 further includes a control device 600. The control device 600 is electrically connected to the first solenoid valve 101 and the second solenoid valve 102. The control device 600 is capable of controlling the first solenoid valve 101 to switch between the first electrical control position and the first electrical control stop position, and is also capable of controlling the second solenoid valve 102 to switch between the second electrical control position and the second electrical control stop position. In addition, the control device can be provided with a remote controller for controlling the working state of the control device.
The pilot-controlled unit 200 further includes an operating handle 700. The operating handle 700 is connected to the first pilot valve 201 and the second pilot valve 202. The operating handle 700 can control the first hydraulic control valve 201 to switch between the first hydraulic control level and the first hydraulic control stop level, and can also control the second hydraulic control valve 202 to switch between the second hydraulic control level and the second hydraulic control stop level.
It should be noted that, in the embodiment of the present invention, the control device 600 may be a conventional hardware control device 600 such as a single chip or a PLC. In other words, the control means of the present invention can be implemented by only a hardware device or a hardware circuit without being implemented by a software program.
In an embodiment of the present invention, the hydraulic control system further includes an actuator 800, a hydraulic pump 901, and an oil tank 902. One side of the main valve 500 is connected to the hydraulic pump 901 and the tank 902, and the other side of the main valve 500 is connected to the actuator 800.
For example, the actuator 800 includes, but is not limited to, an arm cylinder, a swing motor, a travel motor, a boom cylinder, a bucket cylinder, or the like.
An embodiment of the second aspect of the present invention provides a working machine, including a hydraulic control system as described above.
For example, the work machine includes an excavator.
It should be understood that the above-described embodiment is only an exemplary embodiment of the present invention, and should not constitute any limitation to the present invention. That is, the work machine includes, but is not limited to, an excavator. For example, in other embodiments of the present invention, the working machine may further include a crane, a loader, a heading machine, or the like.
Further, since the work machine includes the hydraulic control system as described above, it also has the advantages as described above.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. A hydraulic control system is characterized by comprising an electric control unit, a hydraulic control unit, a switching component, a control oil source and a main valve,
wherein the main valve comprises a control oil port, one side of the electric control unit is connected with the control oil source, the other side of the electric control unit is connected with the control oil port through the switching assembly, one side of the hydraulic control unit is connected with the control oil source, the other side of the hydraulic control unit is connected with the control oil port through the switching assembly,
the switching assembly is used for enabling the control oil source to be communicated with the control oil port through one of the electric control unit and the hydraulic control unit.
2. The hydraulic control system of claim 1, wherein the pilot oil port comprises a first pilot oil port and a second pilot oil port, the electronic control unit comprises a first solenoid valve and a second solenoid valve, the hydraulic control unit comprises a first hydraulic control valve and a second hydraulic control valve,
one side of the first electromagnetic valve is connected with the control oil source, the other side of the first electromagnetic valve is connected with the first control oil port through the switching component, one side of the second electromagnetic valve is connected with the control oil source, the other side of the second electromagnetic valve is connected with the second control oil port through the switching component,
one side of the first hydraulic control valve is connected with the control oil source, the other side of the first hydraulic control valve is connected with the first control oil port through the switching assembly, one side of the second hydraulic control valve is connected with the control oil source, and the other side of the second hydraulic control valve is connected with the second control oil port through the switching assembly.
3. The hydraulic control system of claim 2, wherein the switching assembly includes a first shuttle valve including a first oil inlet, a second oil inlet, and a first oil outlet, and a second shuttle valve including a third oil inlet, a fourth oil inlet, and a second oil outlet,
one side of the first electromagnetic valve is connected with the first oil inlet, one side of the first hydraulic control valve is connected with the second oil inlet, the first oil outlet is connected with the first control oil port, one side of the second electromagnetic valve is connected with the third oil inlet, one side of the second hydraulic control valve is connected with the fourth oil inlet, and the second oil outlet is connected with the second control oil port.
4. The hydraulic control system according to claim 3, wherein the control oil source includes a pilot control oil passage and a control oil return passage, and the other side of the first solenoid valve, the other side of the second solenoid valve, the other side of the first hydraulic control valve, and the other side of the second hydraulic control valve are connected to the pilot control oil passage and the control oil return passage, respectively.
5. The hydraulic control system of claim 4, wherein the first solenoid valve includes a first electrically controlled position and a first electrically controlled shut-off position, wherein the second solenoid valve includes a second electrically controlled position and a second electrically controlled shut-off position,
in the state of the first electric control position, the pilot control oil way is communicated with the first control oil port through the first electromagnetic valve and the first shuttle valve;
in the state of the first electric control stop position, the control oil return path is communicated with the first electromagnetic valve, and the first electromagnetic valve is stopped from the first control oil port through the first shuttle valve;
in the state of the second electric control position, the pilot control oil path is communicated with the second control oil port through the second electromagnetic valve and the second shuttle valve;
and in the state of the second electric control stop position, the control oil return path is communicated with the second electromagnetic valve, and the second electromagnetic valve is stopped from the second control oil port through the second shuttle valve.
6. The hydraulic control system of claim 5, wherein the first pilot operated valve includes a first pilot operated position and a first pilot operated shutoff position, the second pilot operated valve includes a second pilot operated position and a second pilot operated shutoff position,
in the state of the first hydraulic control level, the pilot control oil path is communicated with the first control oil port through the first hydraulic control valve and the first shuttle valve;
under the state of the first hydraulic control cut-off position, the control oil return path is communicated with the first hydraulic control valve, and the first hydraulic control valve is cut off from the first control oil port through the first shuttle valve;
in the state of the second hydraulic control level, the pilot control oil path is communicated with the second control oil port through the second hydraulic control valve and the second shuttle valve;
and in the state of the second hydraulic control stop position, the control oil return path is communicated with the second hydraulic control valve, and the second hydraulic control valve is stopped with the second control oil port through the second shuttle valve.
7. The hydraulic control system of claim 6, wherein the first and second solenoid valves each comprise a two-position, three-way solenoid directional valve, and the first and second pilot operated valves each comprise a two-position, three-way, manual directional valve.
8. The hydraulic control system according to claim 7, wherein the electronic control unit further comprises a control device connected to the first solenoid valve and the second solenoid valve and configured to control operating positions of the first solenoid valve and the second solenoid valve, respectively;
the hydraulic control unit further comprises an operating handle, and the operating handle is connected with the first hydraulic control valve and the second hydraulic control valve and is used for respectively controlling the working positions of the first hydraulic control valve and the second hydraulic control valve.
9. The hydraulic control system of claim 1, further comprising an actuator, a hydraulic pump, and a tank, wherein one side of the main valve is connected to the hydraulic pump and the tank, and the other side of the main valve is connected to the actuator.
10. A work machine, characterized by comprising a hydraulic control system according to any one of claims 1-9.
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| CN202222564606.0U CN218439971U (en) | 2022-09-27 | 2022-09-27 | Hydraulic control system and working machine |
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| CN202222564606.0U CN218439971U (en) | 2022-09-27 | 2022-09-27 | Hydraulic control system and working machine |
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