CN111561015A - Excavator rotation control method, excavator rotation system and excavator - Google Patents
Excavator rotation control method, excavator rotation system and excavator Download PDFInfo
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- CN111561015A CN111561015A CN202010479564.3A CN202010479564A CN111561015A CN 111561015 A CN111561015 A CN 111561015A CN 202010479564 A CN202010479564 A CN 202010479564A CN 111561015 A CN111561015 A CN 111561015A
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- Prior art keywords
- excavator
- oil
- valve
- arm
- working
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/08—Superstructures; Supports for superstructures
- E02F9/10—Supports for movable superstructures mounted on travelling or walking gears or on other superstructures
- E02F9/12—Slewing or traversing gears
- E02F9/121—Turntables, i.e. structure rotatable about 360°
- E02F9/123—Drives or control devices specially adapted therefor
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
- E02F3/422—Drive systems for bucket-arms, front-end loaders, dumpers or the like
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/225—Control of steering, e.g. for hydraulic motors driving the vehicle tracks
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
- E02F9/2267—Valves or distributors
Abstract
The invention relates to the field of engineering machinery, in particular to an excavator rotation control method, an excavator rotation system and an excavator. An excavator swing control method includes: acquiring the working state of a bucket rod oil cylinder; if the bucket rod oil cylinder is in a state of driving a bucket rod of the excavator to unload, acquiring the working state of the rotary motor; if the rotary motor drives the excavator to rotate, a working oil path of the rotary motor is communicated with a rod cavity of the bucket rod oil cylinder, so that hydraulic oil in the working oil path flows to the rod cavity under the action of the rotation potential energy of the excavator and drives the bucket rod to unload. The excavator rotation control method can recover rotation potential energy of the excavator when the excavator rotates and the bucket rod of the excavator is unloaded, transfer the recovered rotation potential energy to the bucket rod in a hydraulic energy mode, and drive the bucket rod to unload as an auxiliary power source, so that energy consumption and use cost of the excavator are reduced.
Description
Technical Field
The invention relates to the field of engineering machinery, in particular to an excavator rotation control method, an excavator rotation system and an excavator.
Background
With the development of industrial technology in the world, as an efficient earthwork construction machine, the hydraulic excavator plays more and more obvious roles in engineering construction; the hydraulic excavator is large in loading mass and inertia, hydraulic pressure is large in the process of rotary braking, an overflow valve is mainly adopted for pressure protection, however, due to the adoption of the structure, the vast majority of rotary potential energy can be converted into heat energy at a throttling port, and then energy waste and system temperature rise are caused, and the reliability of system equipment and the service life of a hydraulic element are influenced.
Disclosure of Invention
The invention aims to provide an excavator rotation control method, an excavator rotation system and an excavator, which can recover rotation potential energy of the excavator when the excavator rotates and a bucket rod of the excavator is unloaded, transfer the recovered rotation potential energy to the bucket rod in a hydraulic energy mode, and drive the bucket rod to unload as an auxiliary power source, so that the energy consumption and the use cost of the excavator are reduced, the overhigh temperature of a hydraulic system of the excavator is avoided, and the reliability of the excavator is improved.
Embodiments of the invention may be implemented as follows:
in a first aspect, an embodiment of the present invention provides an excavator swing control method, including:
acquiring the working state of a bucket rod oil cylinder;
if the bucket rod oil cylinder is in a state of driving a bucket rod of the excavator to unload, acquiring the working state of the rotary motor;
if the rotary motor drives the excavator to rotate, a working oil path of the rotary motor is communicated with a rod cavity of the bucket rod oil cylinder, so that hydraulic oil in the working oil path flows to the rod cavity under the action of the rotation potential energy of the excavator and drives the bucket rod to unload.
In a second aspect, an embodiment of the present invention provides an excavator swing system, where the excavator swing system includes a swing motor, a stick cylinder, a recovery oil path, and a control assembly; two ends of the recovery oil way are respectively communicated with a working oil way of the rotary motor and a rod cavity of the bucket rod oil cylinder;
the control assembly is used for conducting the recovery oil way when the bucket rod oil cylinder drives the bucket rod of the excavator to unload, and the rotary motor drives the excavator to rotate, so that hydraulic oil in the working oil way of the rotary motor flows to the rod cavity under the action of rotary potential energy of the excavator and drives the bucket rod to unload.
In an alternative embodiment, the control assembly includes a stick main control valve and a swing motor main control valve;
the bucket rod main control valve is communicated with a working oil way of the bucket rod oil cylinder, and the rotary motor main control valve is communicated with a working oil way of the rotary motor.
In an alternative embodiment, the control assembly further comprises a first valve body and a second valve body;
the pilot oil path of the first valve body is communicated with the bucket rod main control valve, the pilot oil path of the second valve body is communicated with the first valve body, and the second valve body is communicated with the working oil path of the rotary motor.
In an alternative embodiment, one end of the recovery oil passage that communicates with the working oil passage of the swing motor communicates with the first valve body.
In an alternative embodiment, one end of the recovery oil path, which is used for being communicated with the rod cavity, is connected with the bucket rod main control valve.
In an alternative embodiment, the control assembly comprises two first valve bodies and two second valve bodies;
the rotary motor comprises a first oil port and a second oil port, and the first oil port and the second oil port are both communicated with a working oil way of the rotary motor;
the two second valve bodies are respectively communicated with the working oil passages of the rotary motor at the first oil port and the second oil port;
the pilot oil paths of the two second valve bodies are respectively communicated with the two first valve bodies, and the pilot oil paths of the two first valve bodies are communicated with the bucket rod main control valve.
In an alternative embodiment, the two first valve bodies and the two second valve bodies are two-position three-way hydraulic control reversing valves.
In an optional embodiment, the excavator rotation system further comprises a one-way valve arranged on the recovery oil path, and the one-way valve is used for conducting the recovery oil path in a one-way mode from a working oil path of the rotation motor to the direction of the rod cavity.
In a third aspect, an embodiment of the present invention provides an excavator, which includes the excavator swing system described above.
The embodiment of the invention has the beneficial effects that:
according to the excavator rotation control method, the working state of the rotation motor is obtained by obtaining the working state of the arm cylinder when the arm is in a state of driving the arm of the excavator to unload, and the working oil path of the rotation motor is communicated with the rod cavity of the arm cylinder when the rotation motor is in a state of driving the excavator to rotate, so that hydraulic oil in the working oil path flows to the rod cavity under the action of rotation potential energy of the excavator and drives the arm to unload. By the arrangement mode, when the excavator rotates and the bucket rod of the excavator is unloaded, the rotation potential energy of the excavator is recovered, the recovered rotation potential energy is transferred to the bucket rod in a hydraulic energy mode and is used as an auxiliary power source to drive the bucket rod to unload, and therefore the energy consumption and the use cost of the excavator are reduced; in addition, the recovery mode can avoid the rotation potential energy being converted into heat energy, thereby avoiding the waste of the energy, being beneficial to reducing the temperature of a hydraulic system, and being beneficial to ensuring the reliability of the excavator and the service life of a hydraulic element.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a flowchart illustrating steps of a swing control method for an excavator according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an excavator swing system in the embodiment of the invention.
Icon: 200-excavator swing system; 210-a rotary motor; 220-bucket rod cylinder; 230-recovery oil circuit; 240-a control component; 241-a bucket rod main control valve; 242-rotary motor main control valve; 243-first valve body; 244-a second valve body; 245-one-way valve.
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. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the 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.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to 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 appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
Referring to fig. 1 and 2, fig. 1 illustrates steps of a swing control method of an excavator according to an embodiment of the present invention, and fig. 2 illustrates a structural principle of a swing system of the excavator according to an embodiment of the present invention; the embodiment provides an excavator rotation control method, which comprises the following steps:
acquiring the working state of the arm cylinder 220;
if the arm cylinder 220 is in a state of driving an arm of the excavator to unload, acquiring a working state of the swing motor 210;
if the swing motor 210 is driving the excavator to swing, a working oil path of the swing motor 210 is communicated with a rod chamber of the arm cylinder 220, so that hydraulic oil in the working oil path flows to the rod chamber under the action of swing potential energy of the excavator and drives the arm to unload.
It should be noted that, when the excavator swing control method is adopted, the working state of the swing motor 210 needs to be acquired when the arm cylinder 220 is in the unloading state, so as to avoid that the hydraulic energy converted from swing potential energy affects the normal operation of the arm. Secondly, the excavator swing control method is suitable for the swing of the excavator in the counterclockwise direction and the swing in the clockwise direction.
Secondly, in the process of executing the method, there are various embodiments, such as: the working states of the bucket rod and the excavator can be detected in a manual detection and operation control mode, and the rotary potential energy of the excavator is recovered according to the working states of the bucket rod and the excavator; in addition, the working states of the arm and the excavator can be detected through the sensors in a mode that the controller, the sensors and the electromagnetic control assembly 240 are combined, the controller receives signals detected by the sensors, and the electromagnetic control assembly 240 is controlled, so that the rotary potential energy of the excavator can be recovered according to the working states of the arm and the excavator; secondly, a hydraulic control mode can also be adopted, namely a mode of arranging hydraulic control valves in the hydraulic working circuits of the arm and the excavator is adopted, and the conduction between the hydraulic working circuit of the arm and the hydraulic working circuit of the excavator is controlled according to the flowing state of hydraulic oil in the hydraulic working circuit of the arm and the hydraulic working circuit of the excavator, so that hydraulic energy in the hydraulic working circuit of the arm is transferred to the hydraulic working circuit of the excavator.
The working principle of the excavator rotation control method is as follows:
according to the excavator rotation control method, the working state of the rotation motor 210 is acquired by acquiring the working state of the arm cylinder 220 when the arm is in a state of driving the arm of the excavator to unload, and the working oil path of the rotation motor 210 is communicated with the rod chamber of the arm cylinder 220 when the rotation motor 210 is in a state of driving the excavator to rotate, so that hydraulic oil in the working oil path flows to the rod chamber under the action of rotation potential energy of the excavator and drives the arm to unload. By the arrangement mode, when the excavator rotates and the bucket rod of the excavator is unloaded, the rotation potential energy of the excavator is recovered, the recovered rotation potential energy is transferred to the bucket rod in a hydraulic energy mode, and the recovered rotation potential energy is used as an auxiliary power source to drive the bucket rod to unload, so that the energy consumption and the use cost of the excavator are reduced.
In addition, compared with the prior art, the method for controlling the rotation of the excavator adopts a pressure protection mode of the overflow valve in the rotation process of the excavator, the rotation control method of the excavator can avoid the rotation potential energy being converted into heat energy, thereby avoiding the waste of energy, being beneficial to reducing the temperature of a hydraulic system, and being beneficial to ensuring the reliability of the excavator and the service life of a hydraulic element.
Referring to fig. 1 and fig. 2, based on the foregoing embodiments, the present embodiment further provides an excavator swing system 200, where the excavator swing system 200 includes a swing motor 210, an arm cylinder 220, a recovery oil path 230, and a control assembly 240; both ends of the recovery oil passage 230 are respectively communicated with the working oil passage of the swing motor 210 and the rod chamber of the arm cylinder 220.
The control module 240 is configured to conduct the recovery oil path 230 when the arm cylinder 220 drives an arm of the excavator to unload and the swing motor 210 drives the excavator to swing, so that hydraulic oil in a working oil path of the swing motor 210 flows to a rod chamber under the action of swing potential energy of the excavator and drives the arm to unload.
Further, in the present embodiment, the control assembly 240 includes an arm main control valve 241, a swing motor main control valve 242, a first valve body 243 and a second valve body 244;
the arm main control valve 241 is communicated with a working oil path of the arm cylinder 220, and the rotary motor main control valve 242 is communicated with a working oil path of the rotary motor 210; the pilot oil passage of the first valve body 243 communicates with the arm main control valve 241, and the pilot oil passage of the second valve body 244 communicates with the first valve body 243; the second valve body 244 communicates with a working oil path of the rotary motor 210, one end of the recovery oil path 230 communicating with the working oil path of the rotary motor 210 communicates with the first valve body 243, and one end of the recovery oil path 230 communicating with the rod chamber is connected to the arm main control valve 241.
The operating state of the working oil line of the arm cylinder 220 can be acquired by the arm main control valve 241, and the operating state of the working oil line of the swing motor 210 can be acquired by the swing motor main control valve 242; the arm main control valve 241 and the swing motor main control valve 242 can control the first valve body 243 and the second valve body 244, respectively; the first valve body 243 can also control the conduction state of the recovery oil path 230 and the working oil path of the rotary motor 210;
therefore, when the arm cylinder 220 is in a state of driving the arm of the excavator to unload and the swing motor 210 drives the excavator to swing, the first valve body 243 and the second valve body 244 can be respectively controlled by the arm main control valve 241 and the swing motor main control valve 242, so that the recovery oil path 230 is communicated with the working oil path of the swing motor 210 and the working oil path of the arm cylinder 220, and the hydraulic oil in the working oil path of the swing motor 210 flows to the rod chamber of the arm cylinder 220 under the action of the swing potential energy of the excavator, so that the recovered swing potential energy is transferred to the arm in a hydraulic energy mode by recovering the swing potential energy of the excavator and is used as an auxiliary power source to drive the arm to unload, thereby reducing the energy consumption and the use cost of the excavator.
In the present embodiment, the first valve body 243 is configured to control the operation of the second valve body 244 under the control of the arm main control valve 241 when the arm cylinder 220 is in the state of driving the arm of the excavator to unload; the second valve 244 is used to communicate the recovery oil path 230 with the working oil path of the swing motor 210 and the working oil path of the arm cylinder 220 under the control of the first valve 243 when the swing motor 210 drives the excavator to swing; therefore, the first valve body 243 is prevented from directly controlling the recovery oil path 230 to ensure that the recovery oil path 230 is in a conduction state when the arm cylinder 220 drives the arm of the excavator to unload and the swing motor 210 drives the excavator to swing, so as to avoid the situation of false conduction.
In another embodiment of the present invention, when the control module 240 includes the arm main control valve 241 and the swing motor main control valve 242, another component may be provided, such as an electromagnetic control valve or a sensor, so as to recover the swing potential energy of the excavator and transfer the recovered swing potential energy to the arm in a hydraulic energy manner when the arm cylinder 220 is driving the arm of the excavator to unload and the swing motor 210 is driving the excavator to swing.
Further, in the present embodiment, the rotary motor 210 includes a first oil port (as shown by mark a in fig. 2) and a second oil port (as shown by mark B in fig. 2), and both the first oil port and the second oil port are communicated with the working oil path of the rotary motor 210; when the first oil port is in an oil inlet state and the second oil port is in an oil outlet state, the rotary motor 210 is in a counterclockwise rotation state; when the first oil port is in the oil outlet state and the second oil port is in the oil inlet state, the rotary motor 210 is in the clockwise rotation state; in order to enable the hydraulic oil in the working oil path of the swing motor 210 to flow to the rod chamber and drive the arm to unload under the action of the swing potential energy of the excavator when the swing motor 210 is in the counterclockwise direction or the clockwise direction, the control assembly 240 includes two first valve bodies 243 and two second valve bodies 244, and the two first valve bodies 243 and the two second valve bodies 244 are two-position three-way hydraulic control directional valves. The two second valve bodies 244 are respectively communicated with the working oil passages of the rotary motor 210 at the first oil port and the second oil port; pilot oil passages of the two second valve bodies 244 are respectively communicated with the two first valve bodies 243, and pilot oil passages of the two first valve bodies 243 are both communicated with the arm main control valve 241; accordingly, a control structure corresponding to the counterclockwise and clockwise rotations of the swing motor 210 can be formed, and the swing potential energy generated by the counterclockwise or clockwise rotation of the swing motor 210 can be recovered.
In this embodiment, in order to avoid the oil return in the recovery oil passage 230, the excavator swing system 200 further includes a check valve 245 provided in the recovery oil passage 230, and the check valve 245 is configured to unidirectionally communicate the recovery oil passage 230 in the direction of the rod chamber from the working oil passage of the swing motor 210.
Based on the excavator swing system 200, the excavator according to the embodiment of the present invention includes the excavator swing system 200.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. An excavator swing control method, comprising:
acquiring the working state of a bucket rod oil cylinder (220);
if the arm cylinder (220) is in a state of driving an arm of the excavator to unload, acquiring the working state of the rotary motor (210);
if the slewing motor (210) drives the excavator to slew, a working oil path of the slewing motor (210) is communicated with a rod cavity of the arm cylinder (220), so that hydraulic oil in the working oil path flows to the rod cavity under the action of slewing potential energy of the excavator and drives the arm to unload.
2. An excavator rotation system is characterized in that:
the excavator swing system (200) comprises a swing motor (210), an arm cylinder (220), a recovery oil path (230) and a control assembly (240); two ends of the recovery oil path (230) are respectively communicated with a working oil path of the rotary motor (210) and a rod cavity of the bucket rod oil cylinder (220);
the control assembly (240) is used for conducting the recovery oil path (230) when the arm cylinder (220) drives an arm of an excavator to unload and the swing motor (210) drives the excavator to swing, so that hydraulic oil in a working oil path of the swing motor (210) flows to the arm cavity under the action of swing potential energy of the excavator and drives the arm to unload.
3. The excavator slewing system of claim 2, wherein:
the control assembly (240) comprises a bucket rod main control valve (241) and a rotary motor main control valve (242);
the bucket rod main control valve (241) is communicated with a working oil path of the bucket rod oil cylinder (220), and the rotary motor main control valve (242) is communicated with a working oil path of the rotary motor (210).
4. The excavator slewing system of claim 3, wherein:
the control assembly (240) further comprises a first valve body (243) and a second valve body (244);
the pilot oil passage of the first valve body (243) is communicated with the arm main control valve (241), the pilot oil passage of the second valve body (244) is communicated with the first valve body (243), and the second valve body (244) is communicated with the working oil passage of the rotary motor (210).
5. The excavator slewing system of claim 4, wherein:
one end of the recovery oil passage (230) communicating with the working oil passage of the rotary motor (210) communicates with the first valve body (243).
6. The excavator slewing system of claim 5, wherein:
and the recovery oil path (230) is used for connecting one end communicated with the rod cavity with the main control valve (241) of the bucket rod.
7. The excavator slewing system of claim 4, wherein:
the control assembly (240) comprises two of the first valve bodies (243) and two of the second valve bodies (244);
the rotary motor (210) comprises a first oil port and a second oil port, and the first oil port and the second oil port are both communicated with a working oil circuit of the rotary motor (210);
the two second valve bodies (244) are respectively communicated with the working oil passages of the rotary motor (210) at the first oil port and the second oil port;
the pilot oil passages of the two second valve bodies (244) are respectively communicated with the two first valve bodies (243), and the pilot oil passages of the two first valve bodies (243) are communicated with the arm main control valve (241).
8. The excavator slewing system of claim 7, wherein:
the two first valve bodies (243) and the two second valve bodies (244) are two-position three-way hydraulic control reversing valves.
9. The excavator slewing system of any one of claims 2 to 8, wherein:
the excavator rotation system (200) further comprises a check valve (245) arranged on the recovery oil path (230), and the check valve (245) conducts the recovery oil path (230) in a one-way mode from a working oil path of the rotation motor (210) to the direction of the rod cavity.
10. An excavator, characterized in that:
the excavator comprises an excavator slewing system (200) according to any one of claims 2-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010479564.3A CN111561015A (en) | 2020-05-29 | 2020-05-29 | Excavator rotation control method, excavator rotation system and excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010479564.3A CN111561015A (en) | 2020-05-29 | 2020-05-29 | Excavator rotation control method, excavator rotation system and excavator |
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| Publication Number | Publication Date |
|---|---|
| CN111561015A true CN111561015A (en) | 2020-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010479564.3A Pending CN111561015A (en) | 2020-05-29 | 2020-05-29 | Excavator rotation control method, excavator rotation system and excavator |
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| CN (1) | CN111561015A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115198837A (en) * | 2022-08-01 | 2022-10-18 | 徐州徐工挖掘机械有限公司 | Hydraulic system and excavator |
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| RU2237135C1 (en) * | 2002-12-09 | 2004-09-27 | Открытое акционерное общество "Ижорские заводы" | Hydraulic drive for single-bucket excavator |
| CN102518169A (en) * | 2011-12-27 | 2012-06-27 | 山重建机(济宁)有限公司 | Hybrid hydraulic excavator |
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| CN104405004A (en) * | 2014-11-07 | 2015-03-11 | 徐州徐工挖掘机械有限公司 | Rotating overflow energy recycling system of hydraulic excavator |
| CN102733442B (en) * | 2011-04-02 | 2015-07-22 | 柳工常州机械有限公司 | Gyration energy recycling system of hydraulic excavator |
| CN209620158U (en) * | 2019-02-15 | 2019-11-12 | 青岛雷沃工程机械有限公司 | A kind of excavator hydraulic control system |
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2020
- 2020-05-29 CN CN202010479564.3A patent/CN111561015A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2237135C1 (en) * | 2002-12-09 | 2004-09-27 | Открытое акционерное общество "Ижорские заводы" | Hydraulic drive for single-bucket excavator |
| CN102733442B (en) * | 2011-04-02 | 2015-07-22 | 柳工常州机械有限公司 | Gyration energy recycling system of hydraulic excavator |
| CN102518169A (en) * | 2011-12-27 | 2012-06-27 | 山重建机(济宁)有限公司 | Hybrid hydraulic excavator |
| CN103541395A (en) * | 2013-09-26 | 2014-01-29 | 徐州徐工挖掘机械有限公司 | Hydraulic excavator energy-conservation control system |
| CN104405004A (en) * | 2014-11-07 | 2015-03-11 | 徐州徐工挖掘机械有限公司 | Rotating overflow energy recycling system of hydraulic excavator |
| CN209620158U (en) * | 2019-02-15 | 2019-11-12 | 青岛雷沃工程机械有限公司 | A kind of excavator hydraulic control system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115198837A (en) * | 2022-08-01 | 2022-10-18 | 徐州徐工挖掘机械有限公司 | Hydraulic system and excavator |
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Application publication date: 20200821 |