CN113136918A - Rotation abnormity protection control system and excavator - Google Patents
Rotation abnormity protection control system and excavator Download PDFInfo
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- CN113136918A CN113136918A CN202110572795.3A CN202110572795A CN113136918A CN 113136918 A CN113136918 A CN 113136918A CN 202110572795 A CN202110572795 A CN 202110572795A CN 113136918 A CN113136918 A CN 113136918A
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- pressure sensor
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- 230000002159 abnormal effect Effects 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 7
- 230000008569 process Effects 0.000 claims abstract description 6
- 230000005856 abnormality Effects 0.000 claims description 3
- 238000012790 confirmation Methods 0.000 claims description 3
- 230000006872 improvement Effects 0.000 description 12
- 230000009471 action Effects 0.000 description 10
- FHQVHHIBKUMWTI-ZCXUNETKSA-N 1-palmitoyl-2-oleoyl phosphatidylethanolamine Chemical compound CCCCCCCCCCCCCCCC(=O)OCC(COP(O)(=O)OCCN)OC(=O)CCCCCCC\C=C/CCCCCCCC FHQVHHIBKUMWTI-ZCXUNETKSA-N 0.000 description 6
- 230000000670 limiting effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
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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
- E02F9/20—Drives; Control devices
- E02F9/2004—Control mechanisms, e.g. control levers
-
- 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
-
- 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
- E02F9/226—Safety arrangements, e.g. hydraulic driven fans, preventing cavitation, leakage, overheating
-
- 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
- E02F9/24—Safety devices, e.g. for preventing overload
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Component Parts Of Construction Machinery (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a rotation abnormity protection control system and an excavator, wherein the rotation abnormity protection control system comprises a storage battery, a display, a controller and a pressure sensor; the storage battery is respectively connected with the display and the controller, the controller is respectively connected with the pressure sensor and the display, the pressure sensor is used for detecting a pressure signal of the rotary motor and transmitting the detected pressure signal to the controller, and the controller displays the transmitted pressure signal on the display. The rotation abnormity protection control system feeds back the state of the rotation system in real time, protects the rotation device in real time in the rotation running process, judges whether the rotation is abnormal or not, sets whether the operation is continued or not according to the current state, reduces the damage degree of equipment, avoids the occurrence of safety accidents and reduces the loss.
Description
Technical Field
The invention relates to a rotation abnormity protection control system and an excavator, and belongs to the field of excavating mechanical equipment.
Background
The rotation safety of the excavator is important for the whole excavator, the rotation frequency is high, and the rotation is normal or not, so that the use of the whole excavator is influenced. At present, an excavator has no complete protection method or abnormity warning for rotation abnormity, when a problem occurs in the using process, the problem is hard to detect if the problem is a non-destructive fault, and when a serious problem occurs, the damage to a machine is large, the machine can only be manually checked, and the time and the labor are consumed. If the faults of the rotating device and the system can be found in advance and processed in time, the rotating device and the mechanical equipment are protected, and unnecessary loss can be avoided.
At present, a hydraulic excavator gyration automatic safety warning system and a hydraulic excavator (CN201711438841.0) are disclosed, which comprises a main pump, a gyration motor, a main control valve, a shuttle valve, a control unit and an alarm unit, wherein the main pump is hydraulically connected with the gyration motor through the main control valve, the main control valve is provided with a left pilot pressure control port and a right pilot pressure control port which are connected with pilot hydraulic sources, the shuttle valve is provided with a first shuttle valve inlet, a second shuttle valve inlet and a shuttle valve outlet, the left pilot pressure control port and the right pilot pressure control port are respectively and hydraulically connected with the first shuttle valve inlet and the second shuttle valve inlet of the shuttle valve, the shuttle valve outlet is provided with a pressure sensor, and the control unit is respectively and signally connected with the pressure sensor and the alarm unit. According to the scheme, whether the machine body rotates or not can be automatically, accurately and quickly judged, and then the automatic control alarm unit realizes safety warning to remind surrounding personnel not to enter the rotating operation radius, so that potential safety hazards are eliminated.
The above scheme has the following defects:
(1) at present, alarm is given during rotation operation, potential safety hazards are eliminated, but alarm processing is not carried out during rotation failure.
(2) When the rotation is abnormal, corresponding abnormal detection is not available, the alarm cannot be received, the operation and the rotation are still carried out, and equipment damage and even safety accidents are easily caused.
Disclosure of Invention
In view of the above problems in the prior art, the present invention provides a swing abnormality protection control system and an excavator, which determine whether a swing device is operating normally according to a swing operation condition and a pressure signal, and further protect the swing device and the system when the swing is abnormal.
In order to achieve the above object, the present invention provides a system for protecting and controlling abnormal rotation, which comprises a storage battery, a display, a controller and a pressure sensor;
the storage battery is respectively connected with the display and the controller, the controller is respectively connected with the pressure sensor and the display, the pressure sensor is used for detecting a pressure signal of the rotary motor and transmitting the detected pressure signal to the controller, and the controller displays the transmitted pressure signal on the display.
As an improvement, the pressure sensors comprise a counterclockwise pilot pressure sensor, a clockwise pilot pressure sensor, a counterclockwise gyration pressure sensor and a clockwise gyration pressure sensor;
the counter-clockwise pilot pressure sensor is used for detecting pilot pressure signals of the rotary motor during counter-clockwise rotation, the clockwise pilot pressure sensor is used for detecting pilot pressure signals of the rotary motor during clockwise rotation, the counter-clockwise rotary pressure sensor is used for detecting high-pressure signals of the rotary motor during counter-clockwise rotation, and the clockwise rotary pressure sensor is used for detecting high-pressure signals of the rotary motor during clockwise rotation.
As an improvement, the output signal of the pressure sensor is a voltage signal or a current signal.
As an improvement, when the controller detects that the sensor signal exceeds the range, the pressure sensor body is in fault, the rotation action is forbidden to operate, the controller sends an alarm signal to the display, the display displays a fault code and displays corresponding fault problem description of the sensor, and meanwhile, the display pops up a selection interface for judging whether the whole machine continues to operate.
As an improvement, when the pressure sensor is normal, the controller detects a system pressure signal and a pilot pressure signal, and the controller processes the signals and then sends the processed signals to the display to display current pressure data.
As an improvement, when the controller detects that the system pressure and the pilot pressure are abnormal, the rotation system is abnormal, the rotation action is prohibited to operate, the display pops up a selection interface for judging whether the whole machine continues to operate, meanwhile, the controller sends an alarm signal to the display, and the display displays a fault code and displays corresponding fault problem description.
As an improvement, the display is a touch screen or a screen with keys, and a selection interface popped up by the display is directly selected by touching or is selected by pressing a confirmation key after a corresponding item is selected by keys.
As an improvement, when the rotation operation is performed through hydraulic operation, if the rotation is abnormal, the display pops up a selection interface whether the whole machine continues to operate, meanwhile, the controller sends an alarm signal to the display, and the display displays a fault code and displays corresponding fault problem description.
As an improvement, when the rotation operation is electric control operation, when a handle signal fault or an electromagnetic valve fault or rotation abnormity occurs, a display pops up a selection interface for judging whether the whole machine continues to operate, meanwhile, a controller sends an alarm signal to the display, and the display displays a fault code and displays corresponding fault problem description.
In addition, the invention also provides an excavator, and the rotation abnormity protection control system is installed on the excavator.
Compared with the prior art, the rotation abnormity protection control system feeds back the state of the rotation system in real time, protects the rotation device in real time in the rotation running process, judges whether the rotation is abnormal or not, sets whether the operation is continued or not according to the current state, reduces the damage degree of equipment, avoids the occurrence of safety accidents, and reduces the loss.
Drawings
FIG. 1 is a schematic structural view of the present invention;
in the figure: 1. the display, 2, the controller, 3, right electric control handle, 4, left electric control handle, 5, anticlockwise guide pressure sensor, 6, clockwise guide pressure sensor, 7, anticlockwise gyration pressure sensor, 8, clockwise gyration pressure sensor, 9, right gyration solenoid valve, 10, left gyration solenoid valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below. It should be understood, however, that the description herein of specific embodiments is only intended to illustrate the invention and not to limit the scope of the invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and the terms used herein in the specification of the present invention are for the purpose of describing particular embodiments only and are not intended to limit the present invention.
As shown in fig. 1, a system for protecting and controlling abnormal rotation of an excavator comprises a storage battery, a display 1, a controller 2 and a pressure sensor;
the storage battery is respectively connected with the display 1 and the controller 2 to supply power to the storage battery, the controller 2 is respectively connected with the pressure sensor and the display 1, the pressure sensor is used for detecting a pressure signal of the rotary motor and transmitting the detected pressure signal to the controller 2, and the controller 2 displays the transmitted pressure signal on the display 1.
As a modification of the embodiment, the pressure sensors include a counterclockwise pilot pressure sensor 5, a clockwise pilot pressure sensor 6, a counterclockwise gyration pressure sensor 7, and a clockwise gyration pressure sensor 8;
the counter-clockwise pilot pressure sensor 5 is used for detecting pilot pressure signals of the rotary motor during counter-clockwise rotation, the clockwise pilot pressure sensor 6 is used for detecting pilot pressure signals of the rotary motor during clockwise rotation, the counter-clockwise rotary pressure sensor 7 is used for detecting high-pressure signals of the rotary motor during counter-clockwise rotation, and the clockwise rotary pressure sensor 8 is used for detecting high-pressure signals of the rotary motor during clockwise rotation. The four pressure signals are respectively connected to the controller 2, and the controller 2 reads and analyzes the four pressure signals.
As an improvement of the embodiment, the output signal of the pressure sensor is a voltage signal or a current signal, when the controller 2 detects that the sensor signal exceeds the range, the pressure sensor body fails, the rotation action is prohibited from running, the controller 2 sends an alarm signal to the display 1, and the display 1 displays a fault code and displays corresponding fault problem description of the sensor. Meanwhile, the display 1 pops up a selection interface for judging whether the whole machine continues to operate, including continuing to operate, stopping operating or not making a selection. When the continuous operation is selected, the operation stop of the rotating device is released, and the working device continues to operate; when the operation is selected to be stopped, the rotating device is forbidden to operate, and the working device stops operating; when the selection is not carried out for a certain time, the default rotating device stops running, and the working device continues running. And automatically quitting the current interface when the corresponding operation is selected or the selection is not carried out after the time is exceeded.
As an improvement of the embodiment, the display 1 is a touch screen or a screen with keys, and a pop-up selection interface can be selected directly by touching, or by pressing a confirmation key after selecting a corresponding item through keys to complete the selection.
As an improvement of the embodiment, when the pressure sensor is normal, the controller 2 detects the system pressure and the pilot pressure signal, and the controller 2 processes the signal and then sends the processed signal to the display 1 to display the current pressure data. When system and pilot pressure anomalies are detected, including but not limited to the following faults: leakage of the rotary pilot pressure system or the rotary pressure system causes the pressure to be lower; or the related hydraulic parts are in failure, so that the oil circuit of the valve is communicated, and the pressure of the system is abnormal; or the rotation is blocked, the pressure of the rotation system is higher, the pressure exceeds a set value, for example, the pilot pressure is not in the normal working pressure range, or the pressure of the rotation system is not in the normal working pressure range, or when the pressure of the rotation device system works and the set pressure of the system is too large, the rotation system is abnormal. When the rotation is abnormal, the rotation action is prohibited from running, and meanwhile, the display 1 pops up a selection interface for judging whether the whole machine continues to run or not, wherein the selection interface comprises continuous running, running stopping or no selection. When the continuous operation is selected, the operation stop of the rotating device is released, and the working device continues to operate; when the operation is selected to be stopped, the rotating device is forbidden to operate, and the working device stops operating; when the selection is not carried out after a certain time, the rotation device stops running, and the working device continues running. Meanwhile, the controller 2 sends an alarm signal to the display 1, and the display 1 displays a fault code and displays corresponding fault problem description.
When the rotation operation is performed through hydraulic operation, the hydraulic pilot handle controls the rotation action, the rotation action is controlled through opening of the hydraulic pilot valve, the pilot valve is controlled hydraulically, and if the rotation is abnormal, the limiting action can limit a hydraulic oil pump proportional valve, so that the displacement of an oil pump is limited. In a normal state, if a handle for controlling the rotation operation is not operated, the pilot pressure and the rotation pressure work in a normal range; if a handle for controlling the swing operation is operated, it is detected that the pilot pressure and the swing pressure are within the normal range. In a fault state, when the handle is not operated, the pilot pressure is normal, and the pressure of the rotary system is not in a required working pressure range; when the handle is not operated, the pilot pressure is not within the required working pressure range, and the pressure of the rotary system is normal; when the handle is operated, the pilot pressure is not within the range of the required working pressure, and the pressure of the rotary system is normal; when the handle is operated, the pilot pressure is normal, and the pressure of the rotary system is not in the range of the required working pressure; or when the deviation between the system pressure of the slewing device and the set system pressure is overlarge, the slewing system is abnormal. When the fault state occurs, the display 1 pops up a selection interface for judging whether the whole machine continues to operate, including continuing to operate, stopping operating, or not selecting. When the continuous operation is selected, the operation stop of the slewing device is released, the working device continues to operate, and the hydraulic pump proportional valve outputs a signal normally; when the operation is selected to be stopped, the rotation device is forbidden to operate, the working device stops operating, and when a rotation pilot pressure signal is detected, the signal output of the pump proportional valve is limited; when the selection is not carried out after a certain time, the rotation device stops running, the working device continues running, and when a rotation pilot pressure signal is detected, the signal output of the pump proportional valve is limited. Meanwhile, the controller 2 sends an alarm signal to the display 1, and the display 1 displays a fault code and displays corresponding fault problem description.
When the rotary operation is electric control operation, the rotary action is controlled by an electromagnetic valve, the output is controlled by the right electric control handle 3 and the left electric control handle 4, the handles are in electric proportional control, an electric proportional signal is connected to the controller 2, and the controller 2 outputs a proportional signal to control the right rotary electromagnetic valve 9 and the left rotary electromagnetic valve 10. When the handle is not operated, the electric control handle has a signal, or the electric control handle has no signal when the handle is operated, and the signal fault of the handle is judged; when the electric control handle has no signal, the electromagnetic valve is electrified, the electric control handle has a signal, the electromagnetic valve is not electrified, and the fault of the electromagnetic valve is judged. When the fault occurs, the rotation action is prohibited to operate, and the display 1 pops up a selection interface for judging whether the whole machine continues to operate, including continuing to operate, stopping operating or not making a selection. When the continuous operation is selected, the operation stop of the rotating device is released, and the working device continues to operate; when the operation is selected to be stopped, the rotating device is forbidden to operate, and the working device stops operating; when the selection is not carried out after a certain time, the rotation device stops running, and the working device continues running. Meanwhile, the controller 2 sends an alarm signal to the display 1, and the display 1 displays a fault code and displays corresponding fault problem description.
When the electric control handle and the electromagnetic valve have no faults and are in a normal state, if the electric control handle for controlling the rotation operation is not operated, the pilot pressure and the rotation pressure work in a normal range; if an electric control handle for controlling the rotation operation is operated, the pilot pressure and the rotation pressure are detected to be in a normal range. In a fault state, when the electric control handle is not operated, the pilot pressure is normal, and the pressure of the rotary system is not in the required working pressure range; when the electric control handle is not operated, the pilot pressure is not within the required working pressure range, and the pressure of the rotary system is normal; when the electric control handle is operated, the pilot pressure is not within the required working pressure range, and the pressure of the rotary system is normal; when the electric control handle is operated, the pilot pressure is normal, and the pressure of the rotary system is not in the range of the required working pressure; or when the deviation between the system pressure of the slewing device and the set system pressure is overlarge, the slewing system is abnormal. When the fault occurs, the rotation action prohibits operation, meanwhile, the output of a pump proportional valve signal during rotation is limited, and the display 1 pops up a selection interface for judging whether the whole machine continues to operate or not to perform appropriate selection. Meanwhile, the controller 2 sends an alarm signal to the display 1, and the display 1 displays a fault code and displays corresponding fault problem description.
When the pressure sensor fails or the electric control handle fails or the electromagnetic valve fails or the rotation is abnormal, the display 1 pops up a selection interface whether the whole machine continues to operate, and after corresponding selection is carried out, the interface automatically exits. If the current selection operation is cancelled, the operation selection interface of the display 1 is operated, and whether the operation is forbidden or the operation is continued can be reselected.
The above description is only for the abnormality of the swing device, and the same is applicable to other actions of the excavator, including traveling, safe operation and protection of the boom, arm, and bucket.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A rotation abnormity protection control system is characterized by comprising a storage battery, a display, a controller and a pressure sensor; the storage battery is respectively connected with the display and the controller, the controller is respectively connected with the pressure sensor and the display, the pressure sensor is used for detecting a pressure signal of the rotary motor and transmitting the detected pressure signal to the controller, and the controller displays the transmitted pressure signal on the display.
2. The swing anomaly protection control system according to claim 1, wherein the pressure sensors comprise a counter-clockwise pilot pressure sensor, a counter-clockwise swing pressure sensor, a clockwise swing pressure sensor;
the counter-clockwise pilot pressure sensor is used for detecting pilot pressure signals of the rotary motor during counter-clockwise rotation, the clockwise pilot pressure sensor is used for detecting pilot pressure signals of the rotary motor during clockwise rotation, the counter-clockwise rotary pressure sensor is used for detecting high-pressure signals of the rotary motor during counter-clockwise rotation, and the clockwise rotary pressure sensor is used for detecting high-pressure signals of the rotary motor during clockwise rotation.
3. The system of claim 2, wherein the output signal of the pressure sensor is a voltage signal or a current signal.
4. The system of claim 3, wherein when the controller detects that the sensor signal exceeds the range, the pressure sensor body fails, the operation of the rotation is prohibited, the controller sends an alarm signal to the display, the display displays a fault code and displays a corresponding sensor fault problem description, and the display pops up a selection interface for whether the whole machine continues to operate.
5. The system of claim 3, wherein when the pressure sensor is normal, the controller detects the system pressure and the pilot pressure signal, and the controller processes the signal and sends the processed signal to the display to display the current pressure data.
6. The system of claim 5, wherein when the controller detects the system pressure and pilot pressure are abnormal, the rotating system is abnormal, the rotating operation is prohibited, the display pops up a selection interface for the complete machine to continue operating, and meanwhile the controller sends an alarm signal to the display, and the display displays a fault code and displays a corresponding fault problem description.
7. The system according to claim 4 or 6, wherein the display is a touch screen or a screen with keys, and the display pops up a selection interface, and the selection is directly performed by touching or is performed by pressing a confirmation key after selecting the corresponding item through keys.
8. The system of claim 1, wherein when the swing operation is performed by hydraulic operation, if the swing operation is abnormal, the display pops up a selection interface indicating whether the whole machine continues to operate, and meanwhile the controller sends an alarm signal to the display, and the display displays a fault code and displays a corresponding fault problem description.
9. The system of claim 1, wherein when the swing operation is an electric control operation, when the handle signal fails or the electromagnetic valve fails or the swing is abnormal, the display pops up a selection interface indicating whether the whole machine continues to operate, and meanwhile the controller sends an alarm signal to the display, and the display displays a fault code and displays a corresponding fault problem description.
10. An excavator, wherein the swing abnormality protection control system according to any one of claims 1 to 9 is mounted on the excavator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110572795.3A CN113136918A (en) | 2021-05-25 | 2021-05-25 | Rotation abnormity protection control system and excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110572795.3A CN113136918A (en) | 2021-05-25 | 2021-05-25 | Rotation abnormity protection control system and excavator |
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| Publication Number | Publication Date |
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| CN113136918A true CN113136918A (en) | 2021-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110572795.3A Pending CN113136918A (en) | 2021-05-25 | 2021-05-25 | Rotation abnormity protection control system and excavator |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115538508A (en) * | 2022-09-19 | 2022-12-30 | 徐州徐工挖掘机械有限公司 | Novel excavator rotation control system and control method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203247022U (en) * | 2013-05-15 | 2013-10-23 | 丽水学院 | Failure diagnosis device for slewing hydraulic system of automobile crane |
| CN107916693A (en) * | 2017-12-27 | 2018-04-17 | 青岛雷沃工程机械有限公司 | Hydraulic crawler excavator turns round automatic safe caution system and hydraulic crawler excavator |
| JP2018112304A (en) * | 2017-03-13 | 2018-07-19 | 川崎重工業株式会社 | Hydraulic drive system of construction machine |
| CN112127411A (en) * | 2020-09-18 | 2020-12-25 | 山东临工工程机械有限公司 | Excavator rotation control system, control method and excavator |
-
2021
- 2021-05-25 CN CN202110572795.3A patent/CN113136918A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203247022U (en) * | 2013-05-15 | 2013-10-23 | 丽水学院 | Failure diagnosis device for slewing hydraulic system of automobile crane |
| JP2018112304A (en) * | 2017-03-13 | 2018-07-19 | 川崎重工業株式会社 | Hydraulic drive system of construction machine |
| CN107916693A (en) * | 2017-12-27 | 2018-04-17 | 青岛雷沃工程机械有限公司 | Hydraulic crawler excavator turns round automatic safe caution system and hydraulic crawler excavator |
| CN112127411A (en) * | 2020-09-18 | 2020-12-25 | 山东临工工程机械有限公司 | Excavator rotation control system, control method and excavator |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115538508A (en) * | 2022-09-19 | 2022-12-30 | 徐州徐工挖掘机械有限公司 | Novel excavator rotation control system and control method |
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Application publication date: 20210720 |
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