CN111173070A - Excavator walking control system, electric control excavator and walking safety control method - Google Patents
Excavator walking control system, electric control excavator and walking safety control method Download PDFInfo
- Publication number
- CN111173070A CN111173070A CN202010131303.2A CN202010131303A CN111173070A CN 111173070 A CN111173070 A CN 111173070A CN 202010131303 A CN202010131303 A CN 202010131303A CN 111173070 A CN111173070 A CN 111173070A
- Authority
- CN
- China
- Prior art keywords
- excavator
- walking
- flow rate
- controller
- traveling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000003921 oil Substances 0.000 claims description 94
- 239000010720 hydraulic oil Substances 0.000 claims description 31
- 230000007257 malfunction Effects 0.000 claims description 7
- 230000007935 neutral effect Effects 0.000 claims description 4
- 230000005611 electricity Effects 0.000 abstract description 3
- 238000005086 pumping Methods 0.000 description 11
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- E02F9/226—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
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
- E02F9/2267—Valves or distributors
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention provides an excavator walking control system, an electric control excavator and a walking safety control method, and relates to the technical field of engineering machinery. In the excavator walking control system, flow sensor sets up between walking main valve core and walking motor, and flow sensor is connected with the controller electricity, and the controller is connected with the pilot valve electricity, and the pilot valve is connected in the both ends of walking main valve core, and when the actual flow that flow sensor detected was greater than predetermineeing the flow, the controller control pilot valve reduced the aperture of pilot pressure in order to reduce walking main valve core, and then reduced actual flow, until actual flow is not more than predetermineeing the flow. The electric control excavator comprises an excavator walking control system. The excavator walking control system can prevent the walking motor from exceeding the speed limit, avoid influencing the service life of the motor and reduce potential safety hazards.
Description
Technical Field
The invention relates to the technical field of engineering machinery, in particular to an excavator walking control system, an electric control excavator and a walking safety control method.
Background
Compared with a hydraulic control excavator, the electric control excavator can more accurately control the coordination of the actions of the excavator, and meanwhile, the pressure loss is reduced, the oil consumption is reduced, and the electric control excavator is more energy-saving and environment-friendly. However, when the existing electric control excavator walks on a slope, the walking motor is easy to overspeed, the service life of the walking motor is easy to reduce, and potential safety hazards exist.
Disclosure of Invention
The invention aims to provide an excavator walking control system, an electric control excavator and a walking safety control method, which can prevent a walking motor from overspeed, avoid influencing the service life of the motor and reduce potential safety hazards.
Embodiments of the invention may be implemented as follows:
in a first aspect, an embodiment provides an excavator walking control system, which includes an oil pumping assembly, a walking main valve element, a pilot valve, a walking motor, a flow sensor, and a controller;
the oil pumping assembly is connected to the walking main valve core, the walking main valve core is connected to the walking motor, the flow sensor is arranged between the walking main valve core and the walking motor and used for detecting the actual flow of hydraulic oil flowing through the walking motor, the flow sensor is electrically connected with the controller, the controller is electrically connected with the pilot valve, and the pilot valve is connected to two ends of the walking main valve core and used for providing pilot pressure for the walking main valve core so as to control the opening degree of the walking main valve core;
the controller is used for controlling the pilot valve to reduce the pilot pressure when the actual flow is larger than the preset flow so as to reduce the opening of the walking main valve core, and then the actual flow is reduced until the actual flow is not larger than the preset flow.
In an optional embodiment, a first oil path and a second oil path are arranged between the main walking valve core and the walking motor, one of the first oil path and the second oil path is used for oil inlet of the walking motor, the other one of the first oil path and the second oil path is used for oil return of the walking motor, and the first oil path and the second oil path are both provided with flow sensors.
In an optional embodiment, the device comprises an alarm device, and the controller is electrically connected with the alarm device and used for controlling the alarm device to send out an alarm signal when the actual flow rate is greater than the preset flow rate.
In an alternative embodiment, the alarm device comprises a display, the controller is electrically connected with the display, and the controller is used for controlling the display to display an alarm signal when the actual flow rate is larger than the preset flow rate.
In optional embodiment, including operating handle, the controller is connected with operating handle electricity, and the controller can detect operating handle's operating condition, and when operating handle was located the meso position and actual flow was greater than zero, the controller controlled the pilot valve pressure release in order to avoid the excavator to carry out the malfunction.
In an alternative embodiment, the oil pumping assembly comprises a hydraulic oil tank and an oil pump connected to the hydraulic oil tank, the oil pump being connected to the main traveling valve element.
In an alternative embodiment, the pilot valve is a proportional solenoid valve.
In a second aspect, an embodiment provides an electrically controlled excavator, which includes the excavator walking control system.
In an alternative embodiment, the controller is disposed within a center console of the electronically controlled excavator.
In a third aspect, an embodiment provides a method for controlling the walking safety of an electric control excavator, which is based on the excavator walking control system or the electric control excavator, and includes the following steps:
when the actual flow is larger than the preset flow, the controller controls the pilot valve to reduce the pilot pressure so as to reduce the opening of the walking main valve core, and then the actual flow is reduced until the actual flow is not larger than the preset flow.
The embodiment of the invention has the beneficial effects that:
the excavator walking control system comprises an oil pumping assembly, a walking main valve element, a pilot valve, a walking motor, a flow sensor and a controller. The oil pumping assembly is connected to the walking main valve element, the walking main valve element is connected to the walking motor, the flow sensor is arranged between the walking main valve element and the walking motor and used for detecting the actual flow of hydraulic oil flowing through the walking motor, the flow sensor is electrically connected with the controller, the controller is electrically connected with the pilot valve, and the pilot valve is connected to the two ends of the walking main valve element and used for providing pilot pressure for the walking main valve element so as to control the opening degree of the walking main valve element. The controller is used for controlling the pilot valve to reduce the pilot pressure when the actual flow is larger than the preset flow so as to reduce the opening of the walking main valve core, and then the actual flow is reduced until the actual flow is not larger than the preset flow. The electric control excavator comprises the excavator walking control system. The walking safety control method of the electric control excavator is based on the walking control system of the excavator or the electric control excavator and comprises the following steps of: when the actual flow is larger than the preset flow, the controller controls the pilot valve to reduce the pilot pressure so as to reduce the opening of the walking main valve core, and then the actual flow is reduced until the actual flow is not larger than the preset flow. Excavator walking control system is through setting up flow sensor between walking main valve core and the walking motor in order to detect the actual flow of the hydraulic oil of walking motor of flowing through, if actual flow is greater than the default, then reduce the pilot pressure to walking main valve core through controller control pilot valve, make the aperture of walking main valve core reduce, thereby reduce the actual flow of walking motor of flowing through, until it is not more than predetermineeing the flow, thereby can prevent effectively that the walking motor from speeding, realize the intelligent control to the walking motor rotational speed, avoid influencing the motor life-span, reduce the potential safety hazard of automatically controlled excavator.
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 schematic structural diagram of an excavator walking control system according to an embodiment of the present invention;
FIG. 2 is a control schematic diagram of the excavator walking control system in the embodiment of the invention.
Icon: 100-an excavator walking control system; 110-an oil pumping assembly; 111-third oil way; 112-hydraulic oil tank; 113-a fourth oil passage; 114-an oil pump; 115-fifth oil path; 120-walking main valve element; 121-a first oil passage; 123-a second oil path; 130-a pilot valve; 140-a travel motor; 150-a flow sensor; 160-a controller; 162-a display; 170-operating handle.
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, the present embodiment provides an excavator walking control system 100, which includes an oil pumping assembly 110, a walking main valve 120, a pilot valve 130, a walking motor 140, a flow sensor 150, and a controller 160. Oil pumping assembly 110 is connected to main travel spool 120, and main travel spool 120 is connected to travel motor 140. The pumping assembly 110 delivers hydraulic oil to the travel motor 140 through the travel main spool 120. The flow sensor 150 is disposed between the traveling main spool 120 and the traveling motor 140, and detects an actual flow rate of the hydraulic oil flowing through the traveling motor 140. The flow sensor 150 is electrically connected to a controller 160, the controller 160 is electrically connected to a pilot valve 130, and the pilot valve 130 is connected to both ends of the traveling main spool 120, and is configured to supply a pilot pressure to the traveling main spool 120 to be able to control the opening degree of the traveling main spool 120. The controller 160 is configured to control the pilot valve 130 to decrease the pilot pressure to decrease the opening of the traveling main spool 120 when the actual flow rate is greater than the preset flow rate, so as to decrease the actual flow rate until the actual flow rate is not greater than the preset flow rate.
The oil pumping assembly 110 includes a hydraulic oil tank 112 and an oil pump 114 connected to the hydraulic oil tank 112, the oil pump 114 is connected to the main traveling valve 120, and the oil pump 114 is configured to pump hydraulic oil in the hydraulic oil tank 112 to the main traveling valve 120. A third oil passage 111, a fourth oil passage 113, and a fifth oil passage 115 are provided between the hydraulic tank 112 and the main traveling valve 120, an oil pump 114 is provided in the third oil passage 111, and the third oil passage 111 supplies oil to the main traveling valve 120. The fourth oil passage 113 and the fifth oil passage 115 are used to return the hydraulic oil flowing through the travel motor 140 to the hydraulic oil tank 112. In other embodiments, a valve or the like may be provided in the oil pumping unit 110, and only the main spool 120 is required to be normally supplied with oil.
A first oil passage 121 and a second oil passage 123 are provided between the main travel valve element 120 and the travel motor 140, and both ends of the first oil passage 121 and the second oil passage 123 are connected to the main travel valve element 120 and the travel motor 140, respectively. One of the first oil passage 121 and the second oil passage 123 is used for oil intake of the travel motor 140, and the other is used for oil return of the travel motor 140.
Specifically, the main traveling spool 120 has three states, i.e., a left position, a middle position, and a right position. When the main travel valve element 120 is in the neutral position, the main travel valve element 120 is closed, and hydraulic oil is not allowed to enter the travel motor 140.
When the main travel valve element 120 is at the left position, the third oil passage 111 is communicated with the first oil passage 121, the fifth oil passage 115 is communicated with the second oil passage 123, and hydraulic oil enters the main travel valve element 120 through the third oil passage 111, enters the travel motor 140 from the first oil passage 121, flows to the second oil passage 123 from the travel motor 140, and then returns to the hydraulic oil tank 112 through the main travel valve element 120 and the fifth oil passage 115 again. At this time, the first oil path 121 is used for oil feeding of the traveling motor 140, and the second oil path 123 is used for oil returning of the traveling motor 140.
When the main traveling valve element 120 is positioned at the right position, the third oil passage 111 is communicated with the second oil passage 123, the fourth oil passage 113 is communicated with the first oil passage 121, and hydraulic oil enters the main traveling valve element 120 through the third oil passage 111, enters the traveling motor 140 from the second oil passage 123, flows to the first oil passage 121 from the traveling motor 140, and then returns to the hydraulic oil tank 112 through the main traveling valve element 120 and the fourth oil passage 113 again. At this time, the second oil path 123 is used for oil feeding of the traveling motor 140, and the first oil path 121 is used for oil returning of the traveling motor 140.
The traveling main valve element 120 has pilot valves 130 connected to both ends thereof. In the present embodiment, the pilot valve 130 is a proportional solenoid valve. The pilot valve 130 changes the pilot pressure to the traveling main valve 120 by changing the passing current, and can proportionally control the opening degree of the traveling main valve 120, thereby adjusting the flow rate of the hydraulic oil passing through the traveling main valve 120. In other embodiments, the pilot valve 130 may also be an electro-hydraulic proportional pressure control valve, and only the pilot pressure can be flexibly adjusted.
In the present embodiment, the flow rate sensor 150 is provided on each of the first oil passage 121 and the second oil passage 123. The two flow rate sensors 150 are used to detect the flow rates of the hydraulic oil on the first oil passage 121 and the second oil passage 123, that is, the flow rate passing through the travel motor 140, respectively. The two flow sensors 150 are arranged, so that the detection result is more accurate, and on the other hand, the normal operation of the system can be still maintained under the condition that one flow sensor 150 fails. In other embodiments, the flow rate sensor 150 may be provided only in the first oil passage 121, or the flow rate sensor 150 may be provided only in the second oil passage 123, and only the actual flow rate of the hydraulic oil flowing through the travel motor 140 may be detected.
The controller 160 is electrically connected to the flow sensor 150, the flow sensor 150 sends the detected actual flow rate to the controller 160, and the actual flow rate can be compared with a preset flow rate in the controller 160 for analysis. The controller 160 is also electrically connected to the pilot valve 130. The preset flow can be the flow corresponding to the maximum rotating speed of the walking motor 140, when the actual flow is greater than the preset flow, the walking motor 140 exceeds the maximum rotating speed, the controller 160 controls the current of the pilot valve 130 to change, the pilot pressure of the pilot valve 130 is reduced, the opening degree of the walking main valve element 120 is further reduced, the actual flow is not greater than the preset flow until the actual flow is greater than the preset flow, so that the intelligent speed control of the walking motor 140 is realized, the motor overspeed is prevented, the damage of motor suction is avoided, the service life of the motor is prolonged, and the potential.
Meanwhile, the excavator walking control system 100 includes an alarm device, and the controller 160 is electrically connected to the alarm device and is configured to control the alarm device to send an alarm signal when the actual flow rate is greater than the preset flow rate. In this embodiment, the alarm device includes a display 162, the controller 160 is electrically connected to the display 162, and the controller 160 is configured to control the display 162 to display an alarm signal when the actual flow rate is greater than the preset flow rate. That is, when the actual flow rate is larger than the preset flow rate, the controller 160 can control the display 162 to alarm, and can control the main spool 120 to decrease the opening degree. In other embodiments, the alarm device may include an additional alarm device, and the alarm device may alarm by sound and light at the same time.
The excavator walking control system 100 includes an operation handle 170, the controller 160 is electrically connected to the operation handle 170, and the controller 160 can detect an operation state of the operation handle 170. When the operating handle 170 is located at the middle position and the actual flow is greater than zero, the controller 160 controls the pilot valve 130 to release pressure to avoid malfunction of the excavator. When the operating handle 170 is in the neutral position, the excavator should not walk. However, because the pilot valve 130 has an electromagnetic characteristic error, the main traveling valve element 120 is in a state that the main traveling valve element cannot be completely closed in place, and in this case, hydraulic oil can still enter the traveling motor 140 through the main traveling valve element 120, so that the traveling motor 140 operates, and the excavator generates malfunction, and potential safety hazards exist. In order to avoid this situation, the operating handle 170 is electrically connected to the controller 160, once the controller 160 detects that the operating handle 170 is in the neutral position state, the controller 160 simultaneously determines the actual flow sent by the flow sensor 150, if the actual flow is greater than zero (i.e., the preset flow is zero at this time), the controller 160 can control the current change of the pilot valve 130, so that the pilot valve 130 releases the pressure, so that the main traveling valve element 120 is completely closed in place, i.e., the actual flow is equal to zero, and no oil is supplied to the traveling motor 140, so that the excavator can be prevented from generating malfunction, or the excavator can be automatically stopped when traveling.
The embodiment also provides an electric control excavator, which comprises the excavator walking control system 100.
In this embodiment, the controller 160 is disposed in the console of the electrically controlled excavator. In other embodiments, the controller 160 may be independently disposed outside the console, and only needs to be disposed as required.
The embodiment further provides a walking safety control method of an electric control excavator, which is based on the excavator walking control system 100 or the electric control excavator and comprises the following steps:
when the actual flow rate is greater than the preset flow rate, the controller 160 controls the pilot valve 130 to decrease the pilot pressure to decrease the opening of the traveling main spool 120, thereby decreasing the actual flow rate until the actual flow rate is not greater than the preset flow rate.
When the preset flow is the hydraulic oil flow corresponding to the maximum rotating speed of the walking motor 140, the hydraulic oil flow can be used for preventing the walking motor 140 from overspeed, so that the motor is prevented from being sucked empty, the motor is prevented from being damaged, and the service life of the motor is prolonged. When the preset flow is zero, the pilot valve 130 can be controlled to release pressure when the operating handle 170 is located at the middle position, so that the walking main valve element 120 is located at the completely closed position, the malfunction of the excavator is prevented, or the excavator walks to automatically stop, the potential safety hazard is effectively reduced, and the reliability and the safety of the electric control excavator are improved.
The working principle and the working process of the excavator walking control system 100 are as follows:
the flow sensor 150 may detect an actual flow rate of the hydraulic oil flowing through the travel motor 140 in real time and transmit a data signal to the controller 160. When the actual flow rate exceeds the preset flow rate, the controller 160 controls the display 162 to display an alarm signal to remind the operator. Meanwhile, the controller 160 controls the pilot valve 130 to reduce the pilot pressure and reduce the opening of the traveling main spool 120 until the actual flow rate is not greater than the preset flow rate. If the preset flow rate is the hydraulic oil flow rate corresponding to the maximum rotation speed, the excavator walking control system 100 can control the rotation speed of the walking motor 140 within the preset maximum rotation speed range, so that the motor is prevented from being overspeed, the motor is prevented from being sucked empty, and the service life of the motor is prolonged. If the preset flow is zero, when the operating handle 170 is located at the middle position, the pilot valve 130 is controlled to release pressure, so that the walking main valve element 120 is located at the completely closed position, the malfunction of the excavator is prevented, or the excavator automatically stops walking, and the potential safety hazard is effectively reduced.
The excavator walking control system 100, the electric control excavator and the walking safety control method of the electric control excavator can intelligently control the actual flow of the hydraulic oil flowing through the walking motor 140, so that the actual flow does not exceed the preset flow to prevent the walking motor 140 from overspeed, further prevent the walking motor 140 from being damaged by air suction, and are beneficial to prolonging the service life of the motor, reducing potential safety hazards and improving the reliability of the electric control excavator.
The above description is only for the specific embodiment 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 appended claims.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010131303.2A CN111173070A (en) | 2020-02-28 | 2020-02-28 | Excavator walking control system, electric control excavator and walking safety control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010131303.2A CN111173070A (en) | 2020-02-28 | 2020-02-28 | Excavator walking control system, electric control excavator and walking safety control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111173070A true CN111173070A (en) | 2020-05-19 |
Family
ID=70620861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010131303.2A Pending CN111173070A (en) | 2020-02-28 | 2020-02-28 | Excavator walking control system, electric control excavator and walking safety control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111173070A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113107912A (en) * | 2021-04-28 | 2021-07-13 | 三一重机有限公司 | Constant-speed walking control method and device and excavator |
| CN118814904A (en) * | 2024-08-02 | 2024-10-22 | 徐州徐工挖掘机械有限公司 | A crawler excavator walking safety control method, system and excavator |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080105709A (en) * | 2007-06-01 | 2008-12-04 | 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 | Running motor overspeed prevention device of crawler excavator |
| CN102888873A (en) * | 2012-09-12 | 2013-01-23 | 徐州徐工挖掘机械有限公司 | Device for improving linear running performance of excavator during compound action |
| CN103562565A (en) * | 2011-05-25 | 2014-02-05 | 神钢建设机械株式会社 | Rotary work machine |
| CN107060727A (en) * | 2016-09-27 | 2017-08-18 | 桂林航天工业学院 | A kind of hydraulic gate TT＆C system |
| CN108575092A (en) * | 2017-01-10 | 2018-09-25 | 株式会社小松制作所 | Work vehicle and control method |
| CN108755829A (en) * | 2018-05-24 | 2018-11-06 | 柳州柳工挖掘机有限公司 | Crawler-mounted excavator turns to automatic gear shifting control system and control method |
| CN108978771A (en) * | 2018-06-28 | 2018-12-11 | 柳州柳工挖掘机有限公司 | Hydraulic slewing system and excavator |
| CN211774102U (en) * | 2020-02-28 | 2020-10-27 | 上海三一重机股份有限公司 | Excavator walking control system and electric control excavator |
-
2020
- 2020-02-28 CN CN202010131303.2A patent/CN111173070A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080105709A (en) * | 2007-06-01 | 2008-12-04 | 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 | Running motor overspeed prevention device of crawler excavator |
| CN103562565A (en) * | 2011-05-25 | 2014-02-05 | 神钢建设机械株式会社 | Rotary work machine |
| CN102888873A (en) * | 2012-09-12 | 2013-01-23 | 徐州徐工挖掘机械有限公司 | Device for improving linear running performance of excavator during compound action |
| CN107060727A (en) * | 2016-09-27 | 2017-08-18 | 桂林航天工业学院 | A kind of hydraulic gate TT＆C system |
| CN108575092A (en) * | 2017-01-10 | 2018-09-25 | 株式会社小松制作所 | Work vehicle and control method |
| CN108755829A (en) * | 2018-05-24 | 2018-11-06 | 柳州柳工挖掘机有限公司 | Crawler-mounted excavator turns to automatic gear shifting control system and control method |
| CN108978771A (en) * | 2018-06-28 | 2018-12-11 | 柳州柳工挖掘机有限公司 | Hydraulic slewing system and excavator |
| CN211774102U (en) * | 2020-02-28 | 2020-10-27 | 上海三一重机股份有限公司 | Excavator walking control system and electric control excavator |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113107912A (en) * | 2021-04-28 | 2021-07-13 | 三一重机有限公司 | Constant-speed walking control method and device and excavator |
| CN118814904A (en) * | 2024-08-02 | 2024-10-22 | 徐州徐工挖掘机械有限公司 | A crawler excavator walking safety control method, system and excavator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8510000B2 (en) | Hybrid construction machine | |
| JP3078818B2 (en) | Auxiliary fuel transfer device for aircraft | |
| EP1790859B1 (en) | Hydraulic controller for working machine | |
| US20140090368A1 (en) | Hydraulic system for construction machinery | |
| EP2657539A2 (en) | Hydraulic system for construction machine including emergency control unit for electric hydraulic pump | |
| CN111173070A (en) | Excavator walking control system, electric control excavator and walking safety control method | |
| JP2014502708A (en) | Construction machine hydraulic system | |
| JP2001280256A (en) | Pump control method and pump control device | |
| JP5078748B2 (en) | Control device for hybrid construction machine | |
| CN109154153B (en) | Safety system for construction machine | |
| US20210285185A1 (en) | Working Machine | |
| CN211774102U (en) | Excavator walking control system and electric control excavator | |
| CN104870719B (en) | Automatic variable speed control device and control method for construction machinery | |
| CN107917114B (en) | Method for detecting non-commanded spool positioning and preventing fluid flow to a hydraulic actuator | |
| JP2006290561A (en) | Crane operating control device | |
| KR20150027230A (en) | Slewing work machine | |
| CN104185739A (en) | Hydraulic system for construction equipment | |
| CN114207224B (en) | Construction machine | |
| JP2010112493A (en) | Control device for working machine | |
| CN103775403B (en) | Hydrostatic drive system | |
| JP3294183B2 (en) | Hydraulic winch counter balance circuit | |
| CN104755772B (en) | Method for controlling drive flow of a wheeled excavator | |
| CN210260885U (en) | Confluence switching valve, speed regulation interlocking control system and self-walking crane | |
| JP6160090B2 (en) | Construction machinery | |
| JP3714713B2 (en) | Hydraulic control device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |