CN202073132U - Descending acceleration device of excavator movable arm - Google Patents
Descending acceleration device of excavator movable arm Download PDFInfo
- Publication number
- CN202073132U CN202073132U CN2011201339471U CN201120133947U CN202073132U CN 202073132 U CN202073132 U CN 202073132U CN 2011201339471 U CN2011201339471 U CN 2011201339471U CN 201120133947 U CN201120133947 U CN 201120133947U CN 202073132 U CN202073132 U CN 202073132U
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- China
- Prior art keywords
- mouth
- port
- valve
- movable arm
- regeneration valve
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Abstract
The utility model discloses a descending acceleration device of an excavator movable arm, The device includes a control stick means, a three-position and six-way electro-hydraulic directional valve , a power oil pump, a movable arm oil cylinder, and a regeneration valve, the oil pump outlet port of a manual directional valve is divided into two ways via the manual directional valve, one way is connected to the control port D of the three-position electro-hydraulic directional valve, and the other way is connected to the port P1 of the regeneration valve; the output port of the power oil pump is divided into two ways which are respectively connected to the port P2 and port P3 of the three-position and six-way electro-hydraulic directional valve, port T2 and port C are respectively connected to an oil tank, port A and port B are respectively communicated to the rod cavity and the rodless cavity of the movable arm oil cylinder, port B is connected to the port PB at the upper end of the regeneration valve, the port PM at the lower end of the regeneration valve is connected to the rod cavity of the movable arm oil cylinder. The device provided is compact in structure and convenient in operation. When the piston rod of the movable arm oil cylinder withdraws, a part of pressure oil of the rodless cavity of the movable arm oil cylinder passes through the regeneration valve to back to the rod cavity of the movable arm oil cylinder, therefore, the device provided accelerates the withdraw speed of the piston rod of the movable arm oil cylinder and improves the work efficiency of the excavator.
Description
Technical field
The utility model relates to a kind of equipment of excavator, and especially a kind of excavator swing arm is accelerated the device of decline, belongs to technical field of engineering machinery.
Background technology
Excavator is widely used in fields such as civil engineering, waterpower, electric power, road traffic, mine, harbour and defence construction, during excavator work, boom cylinder, bucket arm cylinder and bucket cylinder are coordinated with each other flexible, drive different construction operations such as finishing excavation, lifting, loading, smooth, soil-shifting, impact grinding.Wherein the flexible drive swing arm pitching swing of boom cylinder drives the equipment operation by dipper again.Because the speed of existing boom cylinder piston rod withdrawal is unhappy, has influenced the speed of swing arm to lower swing, thereby has influenced the operating efficiency of excavator.
Summary of the invention
The purpose of this utility model overcomes the deficiencies in the prior art, and a kind of accelerator of boom cylinder withdrawal of excavator is provided, thereby improves the operating efficiency of excavator.
The utility model is achieved by the following technical programs:
A kind of excavator swing arm decline accelerator, comprise arrangement of levers, three six energising hydraulicchange-over valves, power oil pump, boom cylinder, regeneration valve, described arrangement of levers comprises hand-operated direction valve, hand-operated direction valve oil pump, described hand-operated direction valve oil pump delivery outlet is divided into two-way by hand-operated direction valve, one the tunnel controls mouthful D with three electro-hydraulic directional valves links to each other, and another road links to each other with the P1 mouth of regeneration valve; The delivery outlet of power oil pump divides two-way to link to each other with P2, the P3 mouth of three six energising hydraulicchange-over valves respectively, the T2 mouth of three six energising hydraulicchange-over valves, C mouth be oil sump tank respectively, the A of three six energising hydraulicchange-over valves, B mouth be rod chamber, the rodless cavity of logical boom cylinder respectively, the B mouth of three six energising hydraulicchange-over valves also links to each other with the PB mouth of regeneration valve upper end, the PM mouth of regeneration valve lower end links to each other with the rod chamber of boom cylinder, and the T1 mouth of regeneration valve leads to fuel tank.
The purpose of this utility model can also further realize by following technical measures.
Excavator swing arm decline accelerator, the P1 mouth of wherein said regeneration valve communicates with the one way valve in being arranged on regeneration valve.
The utility model compact conformation, easy to operate.During the withdrawal of boom cylinder piston rod, the pressure oil of hand-operated direction valve oil pump output is divided into two-way, one the tunnel promotes to move on three electro-hydraulic directional valve spools, the one way valve in the regeneration valve has been opened on another road, thereby got through the internal channel of regeneration valve, a part of pressure oil of boom cylinder rodless cavity is got back to fuel tank by three electro-hydraulic directional valves, another part passes regeneration valve and gets back to the boom cylinder rod chamber and form differential connection, quickened boom cylinder piston rod retraction speed, make swing arm quicken to fall after rise, improved the operating efficiency of excavator.
Advantage of the present utility model and characteristics will illustrate by the non-limitative illustration of following preferred embodiment and explain that these embodiment only provide as an example with reference to accompanying drawing.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
The specific embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
As shown in Figure 1, the utility model comprises arrangement of levers 1, three six energising hydraulicchange-over valves 2, power oil pump 3, boom cylinder 4, regeneration valve 5, arrangement of levers 1 comprises hand-operated direction valve 11, hand-operated direction valve oil pump 12, hand-operated direction valve oil pump 12 delivery outlets are divided into two-way by hand-operated direction valve 11, one the tunnel links to each other with the control mouth D of three electro-hydraulic directional valves 2, and another road links to each other with the P1 mouth of regeneration valve.The delivery outlet of power oil pump 3 divides two-way to link to each other with P2, the P3 mouth of three six energising hydraulicchange-over valves 2 respectively, the T2 mouth of three six energising hydraulicchange-over valves 2, C mouth be oil sump tank 6 respectively, the A of three six energising hydraulicchange-over valves 2, B mouth be rod chamber 41, the rodless cavity 42 of logical boom cylinder 4 respectively, the B mouth of three six energising hydraulicchange-over valves 2 also links to each other with the PB mouth of regeneration valve 5 upper ends, the PM mouth of regeneration valve 5 lower ends links to each other with the rod chamber 41 of boom cylinder 4, and the T1 mouth of regeneration valve 5 leads to fuel tank 7.The P1 mouth of regeneration valve 5 communicates with one way valve 51 in being arranged on regeneration valve 5.
Shown in curved arrow, promote hand-operated direction valve 11 handles to the right, the pressure oil of hand-operated direction valve oil pump 12 outputs is divided into two-way by hand-operated direction valve 11, and one road pressure oil leads to the control port D of three six energising hydraulicchange-over valves 2, promotes to move to state shown in Figure 1 on the spool; Another road pressure oil arrives the P1 mouth of regeneration valve 5 as shown by arrows, opens one way valve 51, and the passage of the PM mouth of the upper end PB mouth of regeneration valve 5 and lower end is got through at this moment.The pressure oil of power oil pump 3 leads to P2, the P3 mouth of three six energising hydraulicchange-over valves 2, the P2 mouth is in closed condition, the pressure oil of P3 mouth feeds the rod chamber 41 of boom cylinder 4 through the A mouth, the pressure oil of rodless cavity 42 is through B mouth, the T2 mouth oil sump tank 7 of three six energising hydraulicchange-over valves 2, and the piston rod of oil cylinder 4 is withdrawn.The pressure oil of rodless cavity 42 enters the PB mouth of regeneration valve 5 upper ends, and the passage that passes regeneration valve 5 returns the rod chamber 41 of boom cylinder 4 through the PM of lower end mouth, forms differential connection; The piston rod of oil cylinder 4 quickens withdrawal, and swing arm 6 quickens to fall after rise, has improved the operating efficiency of excavator.
In addition to the implementation, the utility model can also have other embodiments, and all employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection domain of the utility model requirement.
Claims (2)
1. excavator swing arm decline accelerator, comprise arrangement of levers, three six energising hydraulicchange-over valves, power oil pump, boom cylinder, described arrangement of levers comprises hand-operated direction valve, hand-operated direction valve oil pump, it is characterized in that, also comprise regeneration valve, hand-operated direction valve oil pump delivery outlet is divided into two-way by hand-operated direction valve, and one the tunnel controls mouthful D with three electro-hydraulic directional valves links to each other, and another road links to each other with the P1 mouth of regeneration valve; The delivery outlet of power oil pump divides two-way to link to each other with P2, the P3 mouth of three six energising hydraulicchange-over valves respectively, the T2 mouth of three six energising hydraulicchange-over valves, C mouth be oil sump tank respectively, the A of three six energising hydraulicchange-over valves, B mouth be rod chamber, the rodless cavity of logical boom cylinder respectively, the B mouth of three six energising hydraulicchange-over valves also links to each other with the PB mouth of regeneration valve upper end, the PM mouth of regeneration valve lower end links to each other with the rod chamber of boom cylinder, and the T1 mouth of regeneration valve leads to fuel tank.
2. excavator swing arm decline accelerator as claimed in claim 1 is characterized in that, the P1 mouth of described regeneration valve communicates with the one way valve in being arranged on regeneration valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201339471U CN202073132U (en) | 2011-04-29 | 2011-04-29 | Descending acceleration device of excavator movable arm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201339471U CN202073132U (en) | 2011-04-29 | 2011-04-29 | Descending acceleration device of excavator movable arm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202073132U true CN202073132U (en) | 2011-12-14 |
Family
ID=45111235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201339471U Expired - Fee Related CN202073132U (en) | 2011-04-29 | 2011-04-29 | Descending acceleration device of excavator movable arm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202073132U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102587445A (en) * | 2012-03-20 | 2012-07-18 | 龙工（上海）桥箱有限公司 | Load sensing flow control hydraulic system with energy regeneration and conservation |
| CN103998796A (en) * | 2012-03-26 | 2014-08-20 | 萱场工业株式会社 | Boom drive device |
-
2011
- 2011-04-29 CN CN2011201339471U patent/CN202073132U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102587445A (en) * | 2012-03-20 | 2012-07-18 | 龙工（上海）桥箱有限公司 | Load sensing flow control hydraulic system with energy regeneration and conservation |
| CN103998796A (en) * | 2012-03-26 | 2014-08-20 | 萱场工业株式会社 | Boom drive device |
| CN103998796B (en) * | 2012-03-26 | 2016-03-09 | Ｋｙｂ株式会社 | Swing arm drive unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111214 Termination date: 20160429 |