CN102296664A - Hydraulic driving device of excavator - Google Patents
Hydraulic driving device of excavator Download PDFInfo
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- CN102296664A CN102296664A CN201110170092A CN201110170092A CN102296664A CN 102296664 A CN102296664 A CN 102296664A CN 201110170092 A CN201110170092 A CN 201110170092A CN 201110170092 A CN201110170092 A CN 201110170092A CN 102296664 A CN102296664 A CN 102296664A
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- pipeline
- direction valve
- valve
- joint
- hydraulic
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- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (AREA)
Abstract
The invention discloses a hydraulic driving device of an excavator, belonging to the technical field of hydraulic circuit devices. The hydraulic driving device comprises a control valve, a first direction valve, a second direction valve, a bucket arm cylinder, a hydraulic control one-way valve, an oil tank and a first one-way valve, and also comprises a third direction valve, a first pipeline, a second pipeline, a third pipeline, a fourth pipeline, a first joint, a second joint and a spring, wherein one end of the first pipeline is connected with the first joint, the other end of the first pipeline is connected with a pilot control port of the third direction valve, one end of the fourth pipeline is connected with the second joint, the other end of the fourth pipeline is connected with a working oil inlet of the third direction valve, one end of the second pipeline is connected with a working oil outlet of the third direction valve, the other end of the second pipeline is connected with the oil tank, one end of the third pipeline is connected with an oil drainage port of a spring cavity of the third direction valve, and the other end of the third pipeline is connected with the oil tank. The invention has the beneficial effect of improving the excavation capacity of a bucket arm of the hydraulic excavator, thereby improving the operation efficiency of the hydraulic excavator and reducing oil consumption.
Description
Technical field
The present invention relates to a kind of excavator fluid pressure drive device, belong to the circuit apparatus for hydraulic technical field.
Background technology
Present medium-and-large-sized excavator hydraulic system all is devoted to efficient, energy-conservation technical research.The fluid pressure drive device that is used for medium-sized hydraulic crawler excavator at present, its defective is: hydraulic crawler excavator is under excavation or severe duty, crushing was too high when the rod chamber inner fluid of bucket arm cylinder was flowed through direction valve, reduced the output action power when the bucket arm cylinder piston rod stretches out, cause the hydraulic crawler excavator dipper to excavate no force phenomenon, thereby greatly reduce the operating efficiency of hydraulic crawler excavator, and fuel consume is also than higher.
Summary of the invention
Problem at above-mentioned prior art exists the invention provides a kind of excavator fluid pressure drive device, solves excavator boom and excavates unable phenomenon.
To achieve these goals, the technical solution used in the present invention is: a kind of excavator fluid pressure drive device comprises control valve, first direction valve, second direction valve, bucket arm cylinder, hydraulic control one-way valve, fuel tank and first one way valve; A hydraulic fluid port of control valve connects fuel tank, two hydraulic fluid ports are connected in guide's hydraulic fluid port of first direction valve, two actuator ports of first direction valve are the rodless cavity and the rod chamber of connection bucket rod oil cylinder respectively, and second direction valve, hydraulic control one-way valve and first one way valve are arranged in the inner oil duct; Also comprise third direction valve, first pipeline, second pipeline, the 3rd pipeline, the 4th pipeline, first joint, second joint and spring; First pipeline, one end connects first joint, the other end connects the pilot control opening of third direction valve, the 4th pipeline one end connects second joint, the other end connects the work oil-in of third direction valve, second pipeline, one end connects the work oil-out of third direction valve, the other end connects fuel tank, and the 3rd pipeline one end connects the drain tap in third direction valve spring chamber, and an end connects fuel tank.
Preferably, the commutation controlled pressure of described third direction valve is regulated by the rigidity and the decrement of regulating spring.
Preferably, the pressure adjustable range of described third direction valve is 0 to 20MPa.
The invention has the beneficial effects as follows: solved the fluid pressure drive device of hydraulic crawler excavator existing when the bucket arm cylinder piston rod stretches out when heavily loaded operations such as excavation output action power cause the hydraulic crawler excavator dipper to excavate unable defective for a short time; Improve the digging force of hydraulic crawler excavator dipper, thereby improved operating efficiency, the reduction fuel consume of hydraulic crawler excavator.
Description of drawings
Fig. 1 is a principle schematic of the present invention.
Among the figure: 1, control valve, 21, the first direction valve, 22, the second direction valve, 23, third direction valve, 3, bucket arm cylinder, 31, rodless cavity, 32, rod chamber, 4, hydraulic control one-way valve, 5, first one way valve, 61, first pipeline, 62, second pipeline, the 63, the 3rd pipeline, 64, the 4th pipeline, 71, first joint, 72, second joint, 8, spring.
The specific embodiment
The invention will be further described below in conjunction with accompanying drawing.
As shown in Figure 1: the present invention includes control valve 1, first direction valve 21, second direction valve 22, bucket arm cylinder 3, hydraulic control one-way valve 4, fuel tank and first one way valve 5; A hydraulic fluid port of control valve 1 connects fuel tank, two hydraulic fluid ports are connected in guide's hydraulic fluid port of first direction valve 21, two actuator ports of first direction valve 21 are the rodless cavity 31 and the rod chamber 32 of connection bucket rod oil cylinder 3 respectively, and second direction valve 22, hydraulic control one-way valve 4 and first one way valve 5 are arranged in the inner oil duct; Also comprise third direction valve 23, first pipeline 61, second pipeline 62, the 3rd pipeline 63, the 4th pipeline 64, first joint 71, second joint 72 and spring 8; First pipeline, 61 1 ends connect first joint 71, the other end connects the pilot control opening of third direction valve 23, the 4th pipeline 64 1 ends connect second joint 72, the other end connects the work oil-in of third direction valve 23, second pipeline, 62 1 ends connect the work oil-out of third direction valve 23, the other end connects fuel tank, and the 3rd pipeline 63 1 ends connect the drain tap of third direction valve 23 spring cavitys, and an end connects fuel tank.
Preferably, the commutation controlled pressure of described third direction valve 23 is regulated by the rigidity and the decrement of regulating spring 8.
Preferably, the pressure adjustable range of described third direction valve 23 is 0 to 20Mpa.
In the use, control valve 1 makes first direction valve 21 and 22 commutations of second direction valve simultaneously, before first pipeline, 61 inner fluid pressure reach setting value, third direction valve 23 cuts out, bucket arm cylinder 3 rod chambers 32 inner fluids all flow through hydraulic control one-way valve 4 and first direction valve 21, fluid flows to and is divided into two afterwards, part fluid second direction valve 22 back of flowing through flows into fuel tanks, another part fluid flows into bucket arm cylinder 3 rodless cavities 31 to improve the speed of stretching out of bucket arm cylinder 3 inner piston rods, after first pipeline, 61 inner fluid pressure reach setting value, 23 commutations of third direction valve, the bucket arm cylinder 3 rod chambers 32 inner fluid parts hydraulic control one-way valve 4 of flowing through, first direction valve 21 and second direction valve 22 backs flow into fuel tank, another part third direction valve 23 back of flowing through flows into fuel tanks, reduce the rod chamber 32 inner fluid pressure of bucket arm cylinder 3 thus, output action power when stretching out, thereby the operating efficiency of raising hydraulic crawler excavator to improve bucket arm cylinder 3 inner piston rods, reduce fuel consume.
Simultaneously, the commutation controlled pressure of setting third direction valve 23 by the rigidity and the decrement of regulating spring 8, set the optimum pressure value make bucket arm cylinder 3 piston rods not only stretched out speed soon but also output action power big.
Claims (3)
1. an excavator fluid pressure drive device comprises control valve (1), first direction valve (21), second direction valve (22), bucket arm cylinder (3), hydraulic control one-way valve (4), fuel tank and first one way valve (5); A hydraulic fluid port of control valve (1) connects fuel tank, two hydraulic fluid ports are connected in guide's hydraulic fluid port of first direction valve (21), two actuator ports of first direction valve (21) are the rodless cavity (31) and the rod chamber (32) of connection bucket rod oil cylinder (3) respectively, and second direction valve (22), hydraulic control one-way valve (4) and first one way valve (5) are arranged in the inner oil duct; It is characterized in that, also comprise third direction valve (23), first pipeline (61), second pipeline (62), the 3rd pipeline (63), the 4th pipeline (64), first joint (71), second joint (72) and spring (8); First pipeline (61) one ends connect first joint (71), the other end connects the pilot control opening of third direction valve (23), the 4th pipeline (64) one ends connect second joint (72), the other end connects the work oil-in of third direction valve (23), second pipeline (62) one ends connect the work oil-out of third direction valve (23), the other end connects fuel tank, and the 3rd pipeline (63) one ends connect the drain tap of third direction valve (23) spring cavity, and an end connects fuel tank.
2. a kind of excavator fluid pressure drive device according to claim 1 is characterized in that the commutation controlled pressure of described third direction valve (23) is regulated by the rigidity and the decrement of regulating spring (8).
3. a kind of excavator fluid pressure drive device according to claim 1 is characterized in that, the pressure adjustable range of described third direction valve (23) is 0 to 20MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110170092 CN102296664B (en) | 2011-06-23 | 2011-06-23 | Hydraulic driving device of excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110170092 CN102296664B (en) | 2011-06-23 | 2011-06-23 | Hydraulic driving device of excavator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102296664A true CN102296664A (en) | 2011-12-28 |
| CN102296664B CN102296664B (en) | 2013-06-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110170092 Active CN102296664B (en) | 2011-06-23 | 2011-06-23 | Hydraulic driving device of excavator |
Country Status (1)
| Country | Link |
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| CN (1) | CN102296664B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103225632A (en) * | 2012-01-27 | 2013-07-31 | 罗伯特·博世有限公司 | Valve assembly for a mobile work machine |
| CN104358286A (en) * | 2014-11-10 | 2015-02-18 | 广西柳工机械股份有限公司 | Hydraulic control valve with shunt and converging selectable function and loader fixed and variable delivery hydraulic system |
| CN105518312A (en) * | 2013-09-13 | 2016-04-20 | Ｋｙｂ株式会社 | Fluid pressure control device |
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| CN1697933A (en) * | 2003-03-17 | 2005-11-16 | 日立建机株式会社 | Oil pressure circuit for working machines |
| JP2006152663A (en) * | 2004-11-29 | 2006-06-15 | Sumitomo (Shi) Construction Machinery Manufacturing Co Ltd | Driving device of construction machine |
| CN1914384A (en) * | 2004-12-28 | 2007-02-14 | 新履带牵引车三菱有限公司 | Control circuit of construction machine |
| CN101392772A (en) * | 2007-04-10 | 2009-03-25 | 神钢建设机械株式会社 | Hydraulic control device of working machine |
| JP2010047984A (en) * | 2008-08-21 | 2010-03-04 | Sumitomo (Shi) Construction Machinery Co Ltd | Hydraulic circuit of hydraulic excavator |
| CN202170539U (en) * | 2011-06-23 | 2012-03-21 | 徐州徐工挖掘机械有限公司 | Hydraulic driving device of excavator |
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2011
- 2011-06-23 CN CN 201110170092 patent/CN102296664B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1697933A (en) * | 2003-03-17 | 2005-11-16 | 日立建机株式会社 | Oil pressure circuit for working machines |
| JP2006152663A (en) * | 2004-11-29 | 2006-06-15 | Sumitomo (Shi) Construction Machinery Manufacturing Co Ltd | Driving device of construction machine |
| CN1914384A (en) * | 2004-12-28 | 2007-02-14 | 新履带牵引车三菱有限公司 | Control circuit of construction machine |
| CN101392772A (en) * | 2007-04-10 | 2009-03-25 | 神钢建设机械株式会社 | Hydraulic control device of working machine |
| JP2010047984A (en) * | 2008-08-21 | 2010-03-04 | Sumitomo (Shi) Construction Machinery Co Ltd | Hydraulic circuit of hydraulic excavator |
| CN202170539U (en) * | 2011-06-23 | 2012-03-21 | 徐州徐工挖掘机械有限公司 | Hydraulic driving device of excavator |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103225632A (en) * | 2012-01-27 | 2013-07-31 | 罗伯特·博世有限公司 | Valve assembly for a mobile work machine |
| CN103225632B (en) * | 2012-01-27 | 2020-02-21 | 罗伯特·博世有限公司 | Valve device for mobile working machine |
| CN105518312A (en) * | 2013-09-13 | 2016-04-20 | Ｋｙｂ株式会社 | Fluid pressure control device |
| CN104358286A (en) * | 2014-11-10 | 2015-02-18 | 广西柳工机械股份有限公司 | Hydraulic control valve with shunt and converging selectable function and loader fixed and variable delivery hydraulic system |
| CN104358286B (en) * | 2014-11-10 | 2016-06-29 | 广西柳工机械股份有限公司 | Deciliter stream selects function pilot operated valve device and loader to determine variable delivery hydraulic system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102296664B (en) | 2013-06-05 |
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