CN114934559B - Quick change device disengagement control system, method and engineering machinery - Google Patents
Quick change device disengagement control system, method and engineering machinery Download PDFInfo
- Publication number
- CN114934559B CN114934559B CN202210632459.8A CN202210632459A CN114934559B CN 114934559 B CN114934559 B CN 114934559B CN 202210632459 A CN202210632459 A CN 202210632459A CN 114934559 B CN114934559 B CN 114934559B
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- quick
- unlocking key
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000001960 triggered effect Effects 0.000 claims abstract description 23
- 238000001514 detection method Methods 0.000 claims abstract description 9
- 230000000007 visual effect Effects 0.000 claims description 15
- 238000004891 communication Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 2
- 230000004913 activation Effects 0.000 claims 1
- 239000003921 oil Substances 0.000 description 61
- 239000010720 hydraulic oil Substances 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 1
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
- E02F9/2025—Particular purposes of control systems not otherwise provided for
-
- 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
-
- 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
-
- 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
Landscapes
- 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)
- Operation Control Of Excavators (AREA)
Abstract
The invention relates to a quick-change device, which aims to solve the problem that the existing quick-change device is out of engagement and the accessory falls in high altitude; the quick change device release control system comprises a control system, an operating instrument, a quick change device release control method and engineering machinery, wherein the control system is provided with a first unlocking key and a second unlocking key for inputting unlocking signals; the controller detects the pressure value of the large cavity of the movable arm oil cylinder through the pressure detection device after the first unlocking key is triggered, and enables the second unlocking key when the pressure value of the large cavity of the movable arm oil cylinder is located in a set range; the quick-change control device outputs a control current for disconnecting the quick-change device to the quick-change solenoid valve when the first unlocking key and the second unlocking key are triggered simultaneously. In the invention, the risk of high-altitude falling of an accessory cannot be generated when the quick-change device is disconnected, and the risk of disconnection caused by misoperation of the quick-change device is further reduced when the first unlocking key and the second unlocking key are triggered simultaneously when the quick-change device is disconnected.
Description
Technical Field
The present invention relates to a quick-change device, and more particularly, to a quick-change device disengagement control system, method, and construction machine.
Background
The engineering machinery working devices such as loaders, excavators and the like realize corresponding functions by replacing different accessories. The quick-change device pulls the corresponding pin shaft through the piston rod of the oil cylinder to realize connection and disconnection of the accessory and the working device. The oil cylinder of the quick-change device is controlled to stretch and retract by a quick-change electromagnetic valve.
The quick-change electromagnetic valve in the existing quick-change device is directly controlled by a controller or an electric switch, and a driver can easily operate the quick-change device by mistake in a cab. If the accessory is in a state of being lifted by the working device, misoperation of disconnecting the accessory occurs, the accessory falls from the high altitude, and therefore safety accidents can be caused.
Disclosure of Invention
The invention aims to solve the technical problem that the existing quick-change device is erroneously operated to disconnect the accessory to cause the high-altitude falling, and provides a quick-change device disconnection control system, a quick-change device disconnection control method and engineering machinery, which can avoid that the quick-change device is erroneously operated to disconnect the accessory in an unsafe state.
The technical scheme for achieving the purpose of the invention is as follows: the quick-change device is used for connecting an accessory of engineering machinery with a working device, and the control system comprises a quick-change electromagnetic valve and a quick-change control device for controlling the quick-change electromagnetic valve, and is characterized by further comprising a pressure detection device for detecting the large cavity pressure of a movable arm oil cylinder of the lifting working device;
the quick-change control device comprises a controller and an operation instrument which are related by signal communication; the pressure detection device is connected with the controller;
the operation instrument is provided with a first unlocking key and a second unlocking key for triggering unlocking and disengaging operation;
the controller detects the pressure value of the large cavity of the movable arm oil cylinder through the pressure detection device after the first unlocking key is triggered, and enables the second unlocking key when the pressure value of the large cavity of the movable arm oil cylinder is within a preset range;
the quick-change control device outputs control current for disconnecting the quick-change device to the quick-change electromagnetic valve when the first unlocking key and the second unlocking key are triggered simultaneously.
In the invention, the requirement that the pressure value of the large cavity of the movable arm oil cylinder is in a preset range is met, when the movable arm descends to touch the accessory of the working device, the pressure of the large cavity of the movable arm oil cylinder is reduced by about zero megapascals due to the support of the accessory, at the moment, the risk of high-altitude falling of the accessory cannot be generated when the quick-change device is disconnected, and in addition, the first unlocking key and the second unlocking key are required to be triggered simultaneously when the quick-change device is disconnected, so that the risk of disconnection caused by misoperation of the quick-change device is further reduced.
In the quick-change device disconnection control system, the control system further comprises an audible and visual alarm device connected with the controller, and the controller drives the audible and visual alarm device to send out audible and visual alarm information after the first unlocking key is triggered. The audible and visual alarm device sends out audible and visual alarm information to warn people around the accessory to keep away from the accessory, so that accidents are avoided.
In the quick-change device disconnection control system, the operation instrument is further provided with a boom descending indicator lamp, and the controller is used for igniting the boom descending indicator lamp when the first unlocking key is triggered and the pressure value of the large cavity of the boom cylinder is not in a preset range. By lighting the boom-down indicator lamp, an operator is prompted to perform boom-down operation on the engineering machinery, so that the attachment is grounded, and the attachment is safely disconnected.
In the quick-change device release control system, the controller prohibits the second unlocking key when the first unlocking key and the second unlocking key are not triggered simultaneously within a first preset time after the second unlocking key is enabled.
The technical scheme for achieving the purpose of the invention is as follows: the method for controlling the disengagement of the quick-change device is characterized by comprising the following steps:
triggering the first unlocking key to send an unlocking trigger signal to the controller.
The controller detects a movable arm oil cylinder large cavity pressure value and enables the second unlocking key when the movable arm oil cylinder large cavity pressure value is in a preset range.
When the first unlocking key and the second unlocking key are triggered simultaneously, a control current for disconnecting the quick-change device is output to the quick-change electromagnetic valve.
In the quick-change device disconnection control method, the controller drives the audible and visual alarm device to send out audible and visual alarm information after the first unlocking key is triggered.
In the quick-change device release control method, after the first unlocking key is triggered and the pressure value of the large cavity of the movable arm oil cylinder is not in a preset range, the controller controls the movable arm descending indicator lamp to be lightened.
In the quick-change device disengagement control method, the second unlocking key is forbidden when the first unlocking key and the second unlocking key are not triggered simultaneously within a first preset time after the second unlocking key is enabled.
In the quick-change device disengagement control method, the controller continuously detects the pressure value of the large cavity of the movable arm oil cylinder within a second preset time after the first unlocking key is triggered until the pressure value of the large cavity of the movable arm oil cylinder is within a preset range; and when the pressure value of the large cavity of the movable arm oil cylinder is not in the preset range, the controller controls the movable arm descending indicator lamp to be lightened until the preset time is over.
The technical scheme for achieving the purpose of the invention is as follows: the engineering machine is characterized in that the quick-change device of the engineering machine is provided with the quick-change device disengagement control system.
Compared with the prior art, in the invention, when the quick-change device is disconnected, the requirement that the pressure value of the large cavity of the movable arm oil cylinder is in a preset range is met, and the first unlocking key and the second unlocking key are triggered simultaneously, so that the quick-change device is prevented from being disconnected due to misoperation, and the accessory is at zero ground height when the quick-change device is disconnected, thereby realizing the safe disconnection of the quick-change device.
Drawings
Fig. 1 is a control schematic diagram of the quick change device disengagement control system of the present invention.
Part names and serial numbers in the figure:
the hydraulic oil tank 1, the main pump 2, the pressure reducing valve 3, the quick-change electromagnetic valve 4, the one-way pressure reducing valve group 5, the second pressure reducing valve 51, the second one-way valve 52, the hydraulic control one-way valve 6, the execution oil cylinder 7, the operation panel 8, the first unlocking key 81, the second unlocking key 82, the movable arm descending indicator lamp 83, the controller 9, the rotation warning lamp 10, the buzzer 11, the pressure switch 12 and the T-BOX13.
Detailed Description
The following describes specific embodiments with reference to the drawings.
As shown in fig. 1, the hydraulic system of the quick-change device in this embodiment includes a hydraulic oil tank 1, a main pump 2, a pressure reducing valve 3, a quick-change electromagnetic valve 4, a one-way pressure reducing valve group 5, a pilot-operated one-way valve 6, an execution cylinder 7, and the like. The one-way pressure reducing valve group 5 is composed of a second pressure reducing valve 51 and a second one-way valve 52.
The hydraulic oil tank 1 is an indispensable auxiliary element of a hydraulic system, the main pump 2 converts low-pressure oil into high-pressure oil after absorbing oil from the hydraulic oil tank 1, the execution oil cylinder 7 is supplied with oil, the pressure reducing valve 3 and the second pressure reducing valve 51 are main pressure control elements, the pressure of the oil from the main pump is reduced to the pressure required by the execution oil cylinder 7, the quick-change electromagnetic valve 4 is a main direction control element, and the opening or closing of the execution oil cylinder is controlled. The hydraulic control one-way valve 6 is a direction control element, mainly realizing the locking function of the execution cylinder 7 when closed, and the second one-way valve 52 is another direction control element, allowing hydraulic oil to flow unidirectionally from the oil port B to the oil port a of the second one-way valve 52. For example, a wedge-shaped connection type quick connector is selected and additionally arranged, the pressure of the pressure reducing valve 3 is set to be 20Mpa, and the pressure of the pressure reducing valve 5-1 is set to be 10Mpa according to the opening pressure of 20Mpa and the closing pressure of 10Mpa recommended by a manufacturer of the quick connector.
The quick-change electromagnetic valve 4 is a two-position four-way electromagnetic valve, when the quick-change electromagnetic valve 4 is positioned at the left position, the oil coming from the main pump 2 enters from the A port of the pressure reducing valve 3, is depressurized by the pressure reducing valve 3, flows out from the B port of the pressure reducing valve 3, is regulated to 20Mpa, flows in from the oil inlet P of the quick-change electromagnetic valve 4, flows out from the oil port A of the quick-change electromagnetic valve 4, flows in from the oil port A of the one-way pressure reducing valve group 5, is depressurized by the second pressure reducing valve 51, flows out from the oil port B of the one-way pressure reducing valve group 5, and is regulated to 10Mpa from 20 Mpa. Because the pressure of the port a of the second relief valve 51 is 20Mpa and 10Mpa greater than the pressure of the port B of the second relief valve 51, hydraulic oil does not flow from the port B to the port a through the second check valve 52. Flows in from the oil port A of the hydraulic control check valve 6, flows out from the oil port B of the hydraulic control check valve 6, flows into the oil port A of the execution oil cylinder 7, flows out from the oil port B of the execution oil cylinder 7, flows into the oil port B of the quick-change electromagnetic valve 4, flows out from the oil port T of the quick-change electromagnetic valve, and flows back to the oil tank. Thereby realizing the locking of the quick-change device.
When the quick-change electromagnetic valve 4 is positioned at the right position, the oil coming from the main pump 2 enters from the port A of the pressure reducing valve 3, is reduced by the pressure reducing valve 3, flows out from the port B of the pressure reducing valve 3, is regulated to 20Mpa, flows in from the oil inlet P of the quick-change electromagnetic valve 4, flows out from the oil port B of the quick-change electromagnetic valve 4, simultaneously opens the hydraulic control one-way valve 6, enters the oil port B of the execution cylinder 7, and the oil in the large cavity of the execution cylinder 7 flows out from the oil port A, passes through the hydraulic control one-way valve 6, enters the oil port B of the one-way valve 5, passes through the second one-way valve 52, flows out from the oil port A of the one-way pressure reducing valve, enters the oil port A of the quick-change electromagnetic valve 4, flows out from the oil port T of the quick-change electromagnetic valve 4, and flows back into the oil tank. Thereby realizing the disengagement of the quick-change device.
The quick-change device is used for engineering machinery such as a loader, an excavator and the like, and realizes quick connection and disconnection of the accessory and the working device.
The disengagement control system of the quick-change device comprises a quick-change control device for controlling the quick-change electromagnetic valve, a pressure detection device and an audible and visual alarm device.
The quick change control device comprises a controller 9, an operation instrument 8 and a T-BOX13 which are connected in signal communication. The pressure detection device is a pressure switch 12 connected with the controller, and the audible and visual alarm device is a buzzer 11 and a rotary warning lamp 10 which are connected with the controller 9 and controlled to drive to work. The electric control end of the quick-change electromagnetic valve 4 is connected with the operation instrument 8 and can also be connected with a controller.
The operation instrument 8 has a first unlocking key 81 and a second unlocking key 82 for inputting an unlocking signal, and a boom-down indicator 83. The controller 9 detects the pressure value of the large cavity of the movable arm oil cylinder through the pressure switch 12 after the first unlocking key 81 is triggered, and enables the second unlocking key when the pressure value of the large cavity of the movable arm oil cylinder is within a preset range; the quick-change control device outputs a control current for disengaging the quick-change device to the quick-change solenoid valve when the first unlocking key 81 and the second unlocking key 82 are simultaneously activated.
The control method of the quick-change device release control system comprises the following steps:
the operator touches the first unlock key 81, and the first unlock key 81 transmits an unlock trigger signal to the controller 9.
The controller 9 detects the boom cylinder large cavity pressure value after receiving the trigger signal of the first unlocking key 81, and enables the second unlocking key 82 when the boom cylinder large cavity pressure value is within a predetermined range. When the accessory is grounded, the accessory supports a working device of the engineering machinery, the working device is not lifted by virtue of the movable arm oil cylinder, so that the pressure of a large cavity of the movable arm oil cylinder is in a lower pressure and is usually in a preset range of 0-4Mpa, at the moment, the pressure switch 12 outputs a high level, the controller 9 receives a high level signal output by the pressure switch 12, the second unlocking key 82 is enabled, and after the second unlocking key 82 is enabled, an indicator lamp corresponding to the second unlocking key 82 is lightened. If the accessory is in a suspended state, the movable arm of the working device of the engineering machinery is lifted by the movable arm oil cylinder, at the moment, the pressure of the large cavity of the movable arm oil cylinder is higher and is not in a preset range (0-4 Mpa), the pressure switch 12 outputs a low level, the controller 9 prohibits the second unlocking key 82 after receiving the low level signal output by the pressure switch 12, and the indicator lamp corresponding to the second unlocking key 82 is in an off state after the second unlocking key 82 is prohibited. When the second unlocking key 82 is enabled, the corresponding unlocking signal can be generated by touching the second unlocking key. If the second unlocking key is forbidden, touching the second unlocking key can not generate a corresponding unlocking signal.
After the respective indicator lights of the first unlocking key 81 and the second unlocking key 82 on the operation instrument 8 are turned on, the operator simultaneously touches the first unlocking key 81 and the second unlocking key 82, and the controller 9 or the operation instrument 8 outputs control current, so that the quick-change electromagnetic valve 4 is in the right position to realize the disconnection of the quick-change device. The control current output to the quick-change solenoid valve may be output by the controller or by the operation instrument.
When the first unlocking key 81 and the second unlocking key 82 are not touched by the operator at the same time within a first predetermined time, for example, within 10 seconds, after the respective indication lamps of the first unlocking key 81 and the second unlocking key 82 on the operation instrument 8 are turned on, the controller 9 prohibits the second unlocking key 82, turns off the indication lamp corresponding to the second unlocking key, and simultaneously controls the rotation warning lamp 10 and the buzzer 11 to stop working. Waiting for the next time the operator touches the first unlocking key.
When the first unlocking key 81 is touched to send an unlocking trigger signal to the controller, the controller 9 controls the driving buzzer and the rotary warning lamp to work, and sends out an audible and visual warning signal to warn people around the accessory to keep away from and pay attention to safety.
When the first unlocking key 81 is touched to send an unlocking trigger signal to the controller, if the pressure value of the large cavity of the boom cylinder is not within a preset range, namely, when the pressure switch 12 outputs a low level, the controller controls to light the boom-down indicator 83 to prompt an operator to lower the boom.
And the controller continuously detects the pressure value of the large cavity of the movable arm oil cylinder within a second preset time after the first unlocking key is triggered until the pressure value of the large cavity of the movable arm oil cylinder is within a preset range. And when the pressure value of the large cavity of the movable arm oil cylinder is not in the preset range, the movable arm descending indicator lamp 83 is lightened until the preset time is ended, and if the pressure value of the large cavity of the movable arm oil cylinder is detected to be in the preset range in the second preset time, the indicator lamp corresponding to the second unlocking key is lightened, so that the second unlocking key is enabled. If the pressure value of the large cavity of the movable arm oil cylinder is not detected to be in the preset range within the second preset time after the first unlocking key is triggered, the movable arm descending indicator lamp is turned off, the rotary indicator lamp 10 and the buzzer 11 stop working, and the next time the operator touches the first unlocking key is waited.
When the operation meter 8 communicates with the controller 9, the operation state is simultaneously transmitted to the T-BOX13, and the T-BOX13 transmits the operation state to the data platform, which records the operation state of the quick connector. After the remote operation permission is opened, the remote operation quick connector can be realized, unmanned control is realized, the replacement of the accessory is safer, and the development of an unmanned solution is more suitable.
Claims (10)
1. The quick-change device is used for connecting an accessory of engineering machinery with a working device, and the control system comprises a quick-change electromagnetic valve and a quick-change control device for controlling the quick-change electromagnetic valve, and is characterized by further comprising a pressure detection device for detecting the pressure of a large cavity of a movable arm oil cylinder of the lifting working device;
the quick-change control device comprises a controller and an operation instrument which are related by signal communication; the pressure detection device is connected with the controller;
the operation instrument is provided with a first unlocking key and a second unlocking key for triggering unlocking and disengaging operation;
the controller detects the pressure value of the large cavity of the movable arm oil cylinder through the pressure detection device after the first unlocking key is triggered, and enables the second unlocking key when the pressure value of the large cavity of the movable arm oil cylinder is within a preset range;
the quick-change control device outputs control current for disconnecting the quick-change device to the quick-change electromagnetic valve when the first unlocking key and the second unlocking key are triggered simultaneously.
2. The quick change device disengagement control system of claim 1, further comprising an audible and visual alarm coupled to the controller, the controller driving the audible and visual alarm to emit audible and visual alarm information upon activation of the first unlocking key.
3. The quick change device release control system according to claim 1 or 2, wherein the operation meter further has a boom-down indicator, and the controller lights the boom-down indicator after the first unlocking key is activated and the boom cylinder large chamber pressure value is not within a predetermined range.
4. The quick change device disengagement control system of claim 3, wherein the controller disables the second unlocking key when the first unlocking key and the second unlocking key are not simultaneously activated within a first predetermined time after the second unlocking key is activated.
5. A quick change device disengagement control method is characterized by comprising the following steps:
triggering the first unlocking key to send an unlocking trigger signal to the controller;
the controller detects the pressure value of the large cavity of the movable arm oil cylinder and enables the second unlocking key when the pressure value of the large cavity of the movable arm oil cylinder is in a preset range;
when the first unlocking key and the second unlocking key are simultaneously triggered, a control current for disconnecting the quick-change device is output to the quick-change electromagnetic valve of the quick-change device.
6. The quick-change device disengagement control method of claim 5, wherein the controller drives the audible and visual alarm to emit audible and visual alarm information after the first unlocking button is activated.
7. The quick change device disengagement control method of claim 5, wherein the controller controls the boom-down indicator light to be illuminated after the first unlocking button is activated and when the boom cylinder large chamber pressure value is not within a predetermined range.
8. The quick-change device disengagement control method of claim 5, wherein the second unlocking key is disabled when the first unlocking key and the second unlocking key are not simultaneously triggered within a first predetermined time after the second unlocking key is enabled.
9. The quick change device disengagement control method of claim 7, wherein the controller continuously detects the boom cylinder large cavity pressure value until the boom cylinder large cavity pressure value is within a set range within a second predetermined time after the first unlocking key is triggered; and when the pressure value of the large cavity of the movable arm oil cylinder is not in the preset range, the controller turns on the movable arm descending indicator lamp until the preset time is over.
10. A construction machine, characterized in that its quick change device has a quick change device disengagement control system according to any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210632459.8A CN114934559B (en) | 2022-06-07 | 2022-06-07 | Quick change device disengagement control system, method and engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210632459.8A CN114934559B (en) | 2022-06-07 | 2022-06-07 | Quick change device disengagement control system, method and engineering machinery |
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| CN114934559A CN114934559A (en) | 2022-08-23 |
| CN114934559B true CN114934559B (en) | 2023-11-14 |
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| CN202210632459.8A Active CN114934559B (en) | 2022-06-07 | 2022-06-07 | Quick change device disengagement control system, method and engineering machinery |
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| CN (1) | CN114934559B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115653951A (en) * | 2022-10-20 | 2023-01-31 | 上海三一重机股份有限公司 | Hydraulic control system and control method for quick replacement of working machine and accessories |
| CN119288004B (en) * | 2024-11-27 | 2025-09-26 | 柳州柳工挖掘机有限公司 | Quick-change device unlocking and locking control system, method, excavator, and engineering machinery |
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| EP1146175A1 (en) * | 2000-04-13 | 2001-10-17 | Kobelco Construction Machinery Co., Ltd. | Construction machine with simultaneous rotating and arm pulling operation |
| JP2004176440A (en) * | 2002-11-28 | 2004-06-24 | Hitachi Constr Mach Co Ltd | Blade controller |
| CN101748766A (en) * | 2009-12-17 | 2010-06-23 | 三一重机有限公司 | Pressure control method and control loop thereof for actuating mechanism of excavating machine |
| CN203335537U (en) * | 2013-05-23 | 2013-12-11 | 山河智能装备股份有限公司 | Energy recycling hydraulic system of working device |
| CN106089823A (en) * | 2016-08-10 | 2016-11-09 | 龙工(上海)机械制造有限公司 | A kind of wheel loader fast replacing device security control hydraulic system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3973584B2 (en) * | 2003-03-19 | 2007-09-12 | 株式会社クボタ | Hydraulic control device for controlling hydraulic cylinder for working device |
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2022
- 2022-06-07 CN CN202210632459.8A patent/CN114934559B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1146175A1 (en) * | 2000-04-13 | 2001-10-17 | Kobelco Construction Machinery Co., Ltd. | Construction machine with simultaneous rotating and arm pulling operation |
| JP2004176440A (en) * | 2002-11-28 | 2004-06-24 | Hitachi Constr Mach Co Ltd | Blade controller |
| CN101748766A (en) * | 2009-12-17 | 2010-06-23 | 三一重机有限公司 | Pressure control method and control loop thereof for actuating mechanism of excavating machine |
| CN203335537U (en) * | 2013-05-23 | 2013-12-11 | 山河智能装备股份有限公司 | Energy recycling hydraulic system of working device |
| CN106089823A (en) * | 2016-08-10 | 2016-11-09 | 龙工(上海)机械制造有限公司 | A kind of wheel loader fast replacing device security control hydraulic system |
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| CN114934559A (en) | 2022-08-23 |
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