CN110886727A - Adjustable breathing device, hydraulic oil tank and engineering machinery - Google Patents
Adjustable breathing device, hydraulic oil tank and engineering machinery Download PDFInfo
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- CN110886727A CN110886727A CN201911295469.1A CN201911295469A CN110886727A CN 110886727 A CN110886727 A CN 110886727A CN 201911295469 A CN201911295469 A CN 201911295469A CN 110886727 A CN110886727 A CN 110886727A
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- hydraulic oil
- check valve
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- tank
- hydraulic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/26—Supply reservoir or sump assemblies
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/044—Removal or measurement of undissolved gas, e.g. de-aeration, venting or bleeding
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/615—Filtering means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/855—Testing of fluid pressure systems
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
Abstract
The invention discloses an adjustable breathing device, a hydraulic oil tank and engineering machinery, wherein the adjustable breathing device comprises a breathing valve, a one-way valve fixing structure and a plurality of one-way valves, the one-way valve fixing structure is communicated with the breathing valve, the one-way valves are arranged in the circumferential direction of the one-way valve fixing structure, the breathing valve is arranged on the hydraulic oil tank, the one-way valve fixing structure is arranged in the hydraulic oil tank, when the hydraulic oil tank is horizontal, the one-way valves are positioned above the liquid level of hydraulic oil, when the hydraulic oil tank is inclined, the one-way valves positioned above the liquid level of the hydraulic oil are used for conducting an air path between the hydraulic oil tank and the breathing valve, and the one-way valves positioned below the liquid level of the hydraulic oil are used for closing the oil path between the hydraulic oil tank and the breathing valve; the adjustable breathing device avoids the phenomenon that hydraulic oil leaks out due to the fact that hydraulic oil enters the breathing valve when the hydraulic oil tank is inclined.
Description
Technical Field
The invention belongs to the technical field of hydraulic systems, and particularly relates to an adjustable breathing device, a hydraulic oil tank and engineering machinery.
Background
The breather valve in the hydraulic system ensures that hydraulic oil in a stored hydraulic oil tank is isolated from the atmosphere within a certain pressure range and can be communicated with the atmosphere when the pressure exceeds or is lower than the pressure range.
The engineering machinery is used in special environments for a long time, particularly in environments of mountain digging, mine digging and the like, the gradient of a road where the engineering machinery moves is large, the gradient is high, and the breather valve cannot be kept above the liquid level of hydraulic oil all the time, so that the breather valve of a hydraulic oil tank of the engineering machinery is often drained of the hydraulic oil.
Disclosure of Invention
The invention mainly aims to provide an adjustable breathing device, a hydraulic oil tank and engineering machinery.
The invention is realized by the following technical scheme:
the invention provides an adjustable breathing device in a first aspect, which comprises a breathing valve, a one-way valve fixing structure and a plurality of one-way valves;
the one-way valve fixing structure is communicated with the breather valve, and the one-way valves are arranged in the circumferential direction of the one-way valve fixing structure;
the breather valve is used for installing on hydraulic tank, check valve fixed knot constructs be used for installing in the hydraulic tank when the hydraulic tank level, the check valve is located on the hydraulic oil liquid level during the hydraulic tank slope, be located above the hydraulic oil liquid level the check valve is used for switching on the hydraulic tank with gas circuit between the breather valve is located under the hydraulic oil liquid level the check valve is used for closing the hydraulic tank with oil circuit between the breather valve.
As above adjustable respiratory device still includes controller and balanced detector, the check valve with balanced detector all with the controller electricity is connected, balanced detector is used for detecting whether the liquid level of the hydraulic oil in the hydraulic tank is in the horizontality, the controller is used for when balanced detector detects the liquid level slope of hydraulic oil the control is located below the hydraulic oil liquid level the check valve is closed.
As above adjustable respiratory device, check valve fixed knot constructs for hollow tubular structure, check valve fixed knot constructs the first end with the breather valve is connected, check valve fixed knot constructs the second end and seals, and is a plurality of the check valve interval is even set up in the same high circumferential direction of check valve fixed knot constructs.
As the adjustable breathing device is adopted, the number of the one-way valves is four.
As described above, in the adjustable breathing apparatus, the controller is configured to close the check valve on the check valve fixing structure on the side of the tilting direction when the balance detector detects that the hydraulic oil tank is tilted, so that at least one check valve on the check valve fixing structure on the side opposite to the tilting direction is in a conducting state.
As the adjustable breathing device, the second end of the one-way valve fixing structure is provided with the impurity precipitation collecting structure.
As for the adjustable breathing device, one side of the one-way valve communicated with the breathing valve is provided with the filtering structure.
As the adjustable breathing device, the filter structure is the filter screen.
In a second aspect, the invention provides a hydraulic oil tank, which includes an adjustable breathing apparatus, wherein the adjustable breathing apparatus is the adjustable breathing apparatus as described above.
A third aspect of the present invention provides a construction machine, including a hydraulic oil tank, where the hydraulic oil tank is the hydraulic oil tank described above.
The adjustable breathing device comprises a breathing valve, a plurality of one-way valves and a one-way valve fixing structure, wherein the one-way valve fixing structure is communicated with the breathing valve, the one-way valves are arranged in the circumferential direction of the one-way valve fixing structure, the adjustable breathing device is applied to a hydraulic oil tank, when the hydraulic oil tank is horizontal, the one-way valves are positioned above the liquid level of the hydraulic oil, the one-way valves are in an open state, and the breathing valve can keep the internal and external air pressure of the hydraulic oil tank stable; this adjustable breathing device is in during the hydraulic tank slope, the check valve that is located above the hydraulic oil liquid level switches on the gas circuit between hydraulic tank and the breather valve, and the check valve that is located below the hydraulic oil liquid level closes the oil circuit between hydraulic tank and the breather valve, can enough guarantee the stability of the inside and outside atmospheric pressure of hydraulic tank, can avoid hydraulic tank again when the slope hydraulic oil get into the breather valve and lead to the phenomenon that fluid let out.
The hydraulic oil tank comprises the adjustable breathing device, the breathing valve is arranged on the hydraulic oil tank, when the hydraulic oil tank is horizontal, the one-way valve is positioned above the liquid level of the hydraulic oil, the one-way valve is in an open state, and the breathing valve can keep the internal and external air pressure of the hydraulic oil tank stable; this adjustable breathing device is in during the hydraulic tank slope, the check valve that is located above the hydraulic oil liquid level switches on the gas circuit between hydraulic tank and the breather valve, and the check valve that is located below the hydraulic oil liquid level closes the oil circuit between hydraulic tank and the breather valve, can enough guarantee the stability of the inside and outside atmospheric pressure of hydraulic tank, can avoid hydraulic tank again when the slope hydraulic oil get into the breather valve and lead to the phenomenon that fluid let out.
The engineering machinery comprises the hydraulic oil tank, has the beneficial effects of the hydraulic oil tank, and is not described again.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings 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 those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic partial cross-sectional structural view of a hydraulic oil tank according to an embodiment of the present invention;
fig. 2 is a partial structural schematic diagram of a hydraulic oil tank provided by an embodiment of the invention;
FIG. 3 is a schematic cross-sectional view of an adjustable breathing apparatus according to an embodiment of the present invention;
fig. 4 is a top view of a check valve fixing structure and a check valve provided in an embodiment of the present invention.
Description of reference numerals:
1-a hydraulic oil tank;
2-an adjustable breathing apparatus;
21-a breathing valve;
22-a one-way valve;
23-a one-way valve securing structure;
24-an impurity precipitation collection structure;
25-filtration configuration.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "comprises" and "comprising," and any variations thereof, as used herein, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In the description of the present invention, it is to be understood that the terms "upper", "lower", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
The adjustable breathing apparatus, the hydraulic oil tank and the engineering machine provided by the invention are described in detail with reference to specific embodiments.
The first embodiment is as follows:
fig. 1 is a schematic partial cross-sectional structure diagram of a hydraulic oil tank according to an embodiment of the present invention, and fig. 2 is a schematic partial structure diagram of the hydraulic oil tank according to the embodiment of the present invention, please refer to fig. 1 and fig. 2, in which the present embodiment provides a hydraulic oil tank 1 including an adjustable breathing apparatus 2, the adjustable breathing apparatus includes a breathing valve 21, a plurality of check valves 22 and a check valve fixing structure 23, the check valve fixing structure 23 is communicated with the breathing valve 21, and the check valves 22 are disposed in a circumferential direction of the check valve fixing structure 23;
The check valve means that fluid can only flow along the inlet, but fluid at the outlet cannot flow back, and is used for preventing reverse flow in a hydraulic system, the check valve 22 of the present embodiment can prevent the liquid from flowing back into the hydraulic oil tank, and the specific structure of the check valve 22 is not particularly limited in the present embodiment. The check valve fixing structure 23 of the present embodiment is used for installing a check valve, and the shape and material of the check valve fixing structure 23 are not particularly limited in the present embodiment. The breather valve not only ensures that the hydraulic oil in the stored hydraulic oil tank is isolated from the atmosphere within a certain pressure range, but also can be communicated with the atmosphere when the pressure exceeds or is lower than the pressure range, and the specific structure of the breather valve 21 is not particularly limited in this embodiment.
When the hydraulic oil tank 1 is horizontal, the one-way valve 22 is positioned above the liquid level of hydraulic oil, the one-way valve 22 is in an open state, and the breather valve 21 not only ensures that the hydraulic oil in the stored hydraulic oil tank is isolated from the atmosphere within a certain pressure range, but also can be communicated with the atmosphere when the pressure exceeds or is lower than the pressure range; the quantity of check valve is a plurality of, and this embodiment is right the specific quantity of check valve does not do special restriction, and this adjustable respiratory device 2 is in during the slope of hydraulic tank 1, be located above the hydraulic oil liquid level check valve 22 switches on hydraulic tank with gas circuit between the breather valve is located below the hydraulic oil liquid level check valve 22 close hydraulic tank with oil circuit between the breather valve, the inside and outside atmospheric pressure stability of hydraulic tank can be guaranteed to the cooperation of check valve 22 and breather valve 21, has also avoided hydraulic oil to leak.
The adjustable breathing device comprises a breathing valve, a one-way valve and a one-way valve fixing structure, the adjustable breathing device is applied to a hydraulic oil tank, when the hydraulic oil tank is horizontal, the one-way valve is located above the liquid level of the hydraulic oil, the one-way valve is in an open state, and the breathing valve can keep the internal and external air pressure of the hydraulic oil tank stable; this adjustable breathing device is in during the hydraulic tank slope, the check valve that is located above the hydraulic oil liquid level switches on the gas circuit between hydraulic tank and the breather valve, and the check valve that is located below the hydraulic oil liquid level closes the oil circuit between hydraulic tank and the breather valve, can enough guarantee the stability of the inside and outside atmospheric pressure of hydraulic tank, can avoid hydraulic tank again when the slope hydraulic oil get into the breather valve and lead to the phenomenon that fluid let out.
Preferably, the adjustable breathing apparatus 2 of this embodiment further includes a controller and a balance detector, the check valve 22 with the balance detector all with the controller electricity is connected, the balance detector is used for detecting whether the hydraulic oil tank 1 is in the horizontality, and the controller is when the balance detector detects that the hydraulic oil tank 1 inclines, and the check valve below the control hydraulic oil liquid level is closed. The adjustable breathing device of the embodiment is realized by matching the balance detector with the controller, and the control mode is simple.
Fig. 3 is a schematic cross-sectional structural view of an adjustable breathing apparatus provided in an embodiment of the present invention, and fig. 4 is a top view of a one-way valve fixing structure and a one-way valve provided in an embodiment of the present invention. Referring to fig. 3 and 4, preferably, the check valve fixing structure 23 is a hollow cylindrical structure, a first end of the check valve fixing structure 23 is connected to the breather valve 21, another end of the check valve fixing structure 23 is closed, and the check valves 22 are uniformly spaced and arranged in a circumferential direction of the check valve fixing structure 23 at the same height. The check valve fixing structure 23 of the present embodiment is a cylindrical structure, and is simple in manufacturing method, and the check valves 22 are uniformly spaced in the circumferential direction at the same height of the check valve fixing structure 23, so that the appearance is beautiful.
In this embodiment, the number of the check valves 22 is four. In this embodiment, the number of the check valves 22 is set to four, the four check valves 22 are uniformly distributed on the same height of the check valve fixing structure 23 in the circumferential direction, when the hydraulic oil tank is in the horizontal state, the four check valves 22 are all located above the liquid level of the hydraulic oil, and when the balance detector detects that the liquid level of the hydraulic oil is inclined, the controller closes the check valve 22 located on the inclined direction side, so that at least one check valve in the opposite direction of the inclined direction is in the conduction state. This embodiment is through setting up four check valves 22, and the check valve of controller control incline direction and two adjacent check valves of incline direction are closed when hydraulic tank inclines, can avoid hydraulic oil to leak from the hydraulic oil incasement to can guarantee that breather valve 21 is above the fluid liquid level, avoid fluid to leak from the breather valve. This embodiment sets up four check valves, and the structure is easy to be realized, and control mode is simple.
Preferably, the bottom of the one-way valve fixing structure 23 is provided with an impurity precipitation collecting structure 24 for collecting impurities entering through the breather valve 21 and preventing the impurities entering the inside of the one-way valve fixing structure from entering the oil tank.
Preferably, a filtering structure 25 is arranged on one side of the one-way valve 22 communicated with the breather valve 21. By arranging the filtering structure 25, pollutants entering the one-way valve fixing structure 23 through the breather valve 21 can be filtered, the pollutants are prevented from entering the hydraulic oil tank through the one-way valve 22, and the cleanliness of hydraulic oil in the oil tank is improved. In this embodiment, the filtering structure is a filter screen.
Example two:
the embodiment provides a construction machine, which comprises the hydraulic oil tank in the first embodiment.
For example: the hydraulic oil tank comprises an adjustable breathing device, wherein the adjustable breathing device comprises a breathing valve, a one-way valve and a one-way valve fixing structure;
the one-way valve fixing structure is communicated with the breathing valves, the number of the one-way valves is multiple, and the one-way valves are arranged in the circumferential direction of the one-way valve fixing structure;
the breather valve is used for installing on hydraulic tank, check valve fixed knot constructs be used for installing in the hydraulic tank when the hydraulic tank level, the check valve is located on the hydraulic oil liquid level during the hydraulic tank slope, be located above the hydraulic oil liquid level the check valve is used for switching on the hydraulic tank with gas circuit between the breather valve is located under the hydraulic oil liquid level the check valve is used for closing the hydraulic tank with oil circuit between the breather valve.
When the engineering machinery works normally, the hydraulic oil tank is in a horizontal state, the check valve is positioned above the liquid level of the hydraulic oil, the check valve is in an open state, the breather valve not only ensures that the hydraulic oil in the stored hydraulic oil tank is isolated from the atmosphere within a certain pressure range, but also can be communicated with the atmosphere when exceeding or being lower than the pressure range, the internal and external air pressure of the hydraulic oil tank is ensured to be stable, when the engineering machinery inclines, the hydraulic oil tank is in an inclined state, the adjustable breathing device is in when the hydraulic oil tank inclines, the check valve positioned above the liquid level of the hydraulic oil conducts an air circuit between the hydraulic oil tank and the breather valve, the check valve positioned below the liquid level of the hydraulic oil closes an oil circuit between the hydraulic oil tank and the breather valve, the matching of the check valve and the breather valve can ensure the internal and external air pressure stability of.
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 the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. An adjustable breathing apparatus, characterized by:
comprises a breather valve, a one-way valve fixing structure and a plurality of one-way valves;
the one-way valve fixing structure is communicated with the breather valve, and the one-way valves are arranged in the circumferential direction of the one-way valve fixing structure;
the breather valve is used for installing on hydraulic tank, check valve fixed knot constructs be used for installing in the hydraulic tank when the hydraulic tank level, the check valve is located on the hydraulic oil liquid level during the hydraulic tank slope, be located above the hydraulic oil liquid level the check valve is used for switching on the hydraulic tank with gas circuit between the breather valve is located under the hydraulic oil liquid level the check valve is used for closing the hydraulic tank with oil circuit between the breather valve.
2. The adjustable breathing apparatus of claim 1 wherein: still include controller and balanced detector, the check valve with balanced detector all with the controller electricity is connected, balanced detector is used for detecting whether the liquid level of the hydraulic oil in the hydraulic tank is in the horizontality, the controller is used for when balanced detector detects the liquid level slope of hydraulic oil the control is located below the hydraulic oil liquid level the check valve is closed.
3. The adjustable breathing apparatus of claim 2 wherein: the check valve fixed knot constructs for hollow tubular structure, check valve fixed knot constructs the first end with the breather valve is connected, check valve fixed knot constructs the second end and seals, and is a plurality of the check valve interval is even set up in on the same high circumferential direction of check valve fixed knot constructs.
4. The adjustable breathing apparatus of claim 3 wherein: the number of the check valves is four.
5. The adjustable breathing apparatus of claim 3 wherein: the controller is configured to close the check valve on the check valve fixing structure on one side in the tilting direction when the balance detector detects that the hydraulic oil tank is tilted, so that at least one check valve on the check valve fixing structure on the opposite side to the tilting direction is in a conducting state.
6. The adjustable breathing apparatus of any of claims 1-5 wherein: and the second end of the one-way valve fixing structure is provided with an impurity precipitation and collection structure.
7. The adjustable breathing apparatus of claim 6 wherein: and a filtering structure is arranged on one side of the one-way valve communicated with the breather valve.
8. The adjustable breathing apparatus of claim 7 wherein: the filtering structure is a filter screen.
9. A hydraulic oil tank is characterized in that: the adjustable breathing device is arranged on a top plate of the hydraulic oil tank, and the adjustable breathing device is as claimed in any one of claims 1 to 8.
10. A construction machine comprising a hydraulic oil tank according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911295469.1A CN110886727A (en) | 2019-12-16 | 2019-12-16 | Adjustable breathing device, hydraulic oil tank and engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911295469.1A CN110886727A (en) | 2019-12-16 | 2019-12-16 | Adjustable breathing device, hydraulic oil tank and engineering machinery |
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| Publication Number | Publication Date |
|---|---|
| CN110886727A true CN110886727A (en) | 2020-03-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911295469.1A Pending CN110886727A (en) | 2019-12-16 | 2019-12-16 | Adjustable breathing device, hydraulic oil tank and engineering machinery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113803305A (en) * | 2021-08-16 | 2021-12-17 | 中联重科土方机械有限公司 | Control method and control system of air pressure balance control device and engineering machinery |
-
2019
- 2019-12-16 CN CN201911295469.1A patent/CN110886727A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113803305A (en) * | 2021-08-16 | 2021-12-17 | 中联重科土方机械有限公司 | Control method and control system of air pressure balance control device and engineering machinery |
| CN113803305B (en) * | 2021-08-16 | 2024-04-02 | 中联重科土方机械有限公司 | Control method and control system of air pressure balance control device and engineering machinery |
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