CN204942135U - The control gear of excavator hydraulic system - Google Patents
The control gear of excavator hydraulic system Download PDFInfo
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- CN204942135U CN204942135U CN201520645543.9U CN201520645543U CN204942135U CN 204942135 U CN204942135 U CN 204942135U CN 201520645543 U CN201520645543 U CN 201520645543U CN 204942135 U CN204942135 U CN 204942135U
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- reduction valve
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Abstract
The utility model relates to excavator hydraulic system technical field, especially a kind of control gear of excavator hydraulic system.Comprise main valve, solenoid-operated proportional reduction valve, shuttle valve, hydraulic proportional reduction valve, the outlet of shuttle valve is connected by flexible pipe with the pilot control hydraulic fluid port of main valve one end; Two entrances of shuttle valve are connected with the outlet of solenoid-operated proportional reduction valve with hydraulic proportional reduction valve respectively; Solenoid-operated proportional reduction valve is connected with external electrical control signal by electric interfaces, and hydraulic proportional reduction valve is also connected with handle.The utility model adds an operation sequential mode on the basis not changing original hydraulic operation handle control performance, and with original lever operated in parallel relationship, adds redundancy and the reliability of system.
Description
Technical field
The utility model relates to excavator hydraulic system technical field, especially a kind of control gear of excavator hydraulic system.
Background technique
The hydraulic system of excavator and other most of engineering machinery is primarily of parts compositions such as pump, main valve, pilot valve, handle, oil cylinder, fuel tank, cooling systems.During operation, the power oil providing pressure higher by pump and the lower guide oil of pressure, driver, by operating grip, makes pilot valve produce action, control the pressure of guide oil, thus control bound spool produces displacement; Valve core of main valve produces the pressure size that certain displacement can control outputting power oil accordingly, thus drives oil cylinder to produce action, and fulfil assignment task.
At present, the mode of handle control pilot valve has hydraulic control and automatically controlled two kinds.Hydraulic control mode is relatively simple for structure, and reliability is high, and price is low; The controlling curve of automatically controlled mode is adjustable flexibly, easily and the computer control of automatical control system Interface realization and faut detection.What existing excavator adopted is only independent hydraulic control or automatically controlled mode, and this just has very large narrow limitation when some extraordinary excavator needs to realize particular job task.
Existing a kind of control gear as shown in Figure 1, utilizes sensor to convert the guide oil that existing excavator hydraulic control pilot valve exports to electrical signal, then drives electric proportional pilot valve control bound by electrical signal.In the electrical signal conversion links of this device, outside automatically controlled signal can be added, realize automatically controlled in parallel with hydraulic control, form redundancy control system.
This device changes the mode of Hydraulic guide control, when making to be undertaken operating by hydraulic handle, add the medium taches such as sensor, controller, automatically controlled pilot valve, change the original control performance of Hydraulic guide control, this cascaded structure too increases system complexity simultaneously, reliability is reduced, and any one link breaks down, and system just cannot be run.
Model utility content
The technical problems to be solved in the utility model is to provide a kind of control gear of excavator hydraulic system, while part excavator retains reliability hydraulic controlled operation module high, easy to maintenance, for it increases electric control operation module; This electric control operation module and hydraulic controlled operation module, mutually in parallel relationship, form redundancy control system, considerably increase the reliability of system.。
In order to solve the problems of the technologies described above, the utility model comprises main valve, solenoid-operated proportional reduction valve, shuttle valve, hydraulic proportional reduction valve, and the outlet of shuttle valve is connected by flexible pipe with the pilot control hydraulic fluid port of main valve one end; Two entrances of shuttle valve are connected with the outlet of solenoid-operated proportional reduction valve with hydraulic proportional reduction valve respectively; Solenoid-operated proportional reduction valve is connected with external electrical control signal by electric interfaces, and hydraulic proportional reduction valve is also connected with handle.
The utility model adds an operation sequential mode on the basis not changing original hydraulic operation handle control performance, and with original lever operated in parallel relationship, adds redundancy and the reliability of system.
Accompanying drawing explanation
Fig. 1 is the structure principle chart of existing control gear.
Fig. 2 is the utility model structure principle chart.
Embodiment
Embodiment cited by the utility model; just understand the utility model for helping; should not be construed as the restriction to the utility model protection domain; for those skilled in the art; under the prerequisite not departing from the utility model thought; can also improve the utility model and modify, these improve and modification also falls in the scope of the utility model claim protection.
As shown in Figure 2, comprise main valve 203, solenoid-operated proportional reduction valve 201, shuttle valve 202, hydraulic proportional reduction valve 204; The outlet of shuttle valve 202 is connected by flexible pipe with the pilot control hydraulic fluid port of main valve one end; Two entrances of shuttle valve are connected with the outlet of solenoid-operated proportional reduction valve 201 with hydraulic proportional reduction valve (204) respectively; Solenoid-operated proportional reduction valve can accept electrical control signal by electric interfaces 206 and produce corresponding action, control the guide oil pressure of its oil outlet, thus control bound 203 spool moves; Hydraulic proportional reduction valve can receive the control signal of operator by handle 205 and produce corresponding action, controls the guide oil pressure of its oil outlet, thus also can the movement of control bound 203 spool.
Original system complex structure, has the link such as sensor, controller, as long as these links one break down, system just cannot have been run, system of the present utility model, hydraulic proportional reduction valve and solenoid-operated proportional reduction valve any one break down, another can also normally work.
Claims (1)
1. the control gear of excavator hydraulic system, it is characterized in that, comprise main valve (203), solenoid-operated proportional reduction valve (201), shuttle valve (202), hydraulic proportional reduction valve (204), the outlet of shuttle valve (202) is connected by flexible pipe with the pilot control hydraulic fluid port of main valve (203) one end; Two entrances of shuttle valve (202) are connected with the outlet of solenoid-operated proportional reduction valve (201) with hydraulic proportional reduction valve (204) respectively; Solenoid-operated proportional reduction valve (201) is connected with external electrical control signal by electric interfaces (206), and hydraulic proportional reduction valve (204) is also connected with handle (205).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520645543.9U CN204942135U (en) | 2015-08-25 | 2015-08-25 | The control gear of excavator hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520645543.9U CN204942135U (en) | 2015-08-25 | 2015-08-25 | The control gear of excavator hydraulic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204942135U true CN204942135U (en) | 2016-01-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520645543.9U Active CN204942135U (en) | 2015-08-25 | 2015-08-25 | The control gear of excavator hydraulic system |
Country Status (1)
| Country | Link |
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| CN (1) | CN204942135U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106321541A (en) * | 2016-08-30 | 2017-01-11 | 中煤科工集团西安研究院有限公司 | Electric-hydraulic double-control hydraulic system and method for vehicle-mounted drilling machine |
| CN106762916A (en) * | 2017-02-28 | 2017-05-31 | 徐工集团工程机械有限公司 | Work connection, load sensing multi-way valve and engineering machinery |
| CN109235530A (en) * | 2018-11-08 | 2019-01-18 | 北京拓疆者智能科技有限公司 | Hydraulic system and excavator for excavator |
| CN109235531A (en) * | 2018-11-08 | 2019-01-18 | 北京拓疆者智能科技有限公司 | Rear dress unmanned systems and excavator for excavator |
-
2015
- 2015-08-25 CN CN201520645543.9U patent/CN204942135U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106321541A (en) * | 2016-08-30 | 2017-01-11 | 中煤科工集团西安研究院有限公司 | Electric-hydraulic double-control hydraulic system and method for vehicle-mounted drilling machine |
| CN106762916A (en) * | 2017-02-28 | 2017-05-31 | 徐工集团工程机械有限公司 | Work connection, load sensing multi-way valve and engineering machinery |
| CN109235530A (en) * | 2018-11-08 | 2019-01-18 | 北京拓疆者智能科技有限公司 | Hydraulic system and excavator for excavator |
| CN109235531A (en) * | 2018-11-08 | 2019-01-18 | 北京拓疆者智能科技有限公司 | Rear dress unmanned systems and excavator for excavator |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |