CN102678663B - Oil cylinder for excavator and excavator with cylinder - Google Patents
Oil cylinder for excavator and excavator with cylinder Download PDFInfo
- Publication number
- CN102678663B CN102678663B CN201210172764.XA CN201210172764A CN102678663B CN 102678663 B CN102678663 B CN 102678663B CN 201210172764 A CN201210172764 A CN 201210172764A CN 102678663 B CN102678663 B CN 102678663B
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- rodless cavity
- rod chamber
- hydraulic fluid
- fluid port
- spool
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Abstract
The invention discloses an oil cylinder for an excavator, relating to the field of hydraulic oil cylinders. The oil cylinder for the excavator comprises a barrel-shaped cylinder body, a piston rod, a piston and a valve body connected to the cylinder body. The valve body comprises a rodless cavity valve core, a rod cavity valve core, a rodless cavity oil port, a rod cavity oil port, a high pressure oil port and an oil return port, wherein the rodless cavity oil port is connected with a rodless cavity, and the rod cavity oil port is connected with the rod cavity. The oil cylinder for the excavator has the advantages that the oil cylinder and a control valve are in integrative arrangement, and the response speed of the oil cylinder is high; two valve rods respectively control the two oil ports of the oil cylinder, the opening characteristic of the valve can be designed as required, the oil returning pressure of the system is low, and the efficiency of the hydraulic system can be improved.
Description
Technical field
The present invention relates to a kind of hydraulic jack, especially a kind of excavator oil cylinder and the excavator with this oil cylinder.
Background technique
Excavator, also known as excavation machinery, is excavate higher or lower than the material holding machine side with scraper bowl, and loads haulage vehicle or unload the civil machinery to stocking yard.Material mainly soil, coal, silt and the Soil and Rock after pre-pine excavated.Along with the development of engineering machinery, excavator becomes one of topmost engineering machinery type in engineering construction.
Oil cylinder is executive component important on excavator, and the hydraulic system of excavator carries out work by hydraulic oil cylinder driving actuator.Existing excavator oil cylinder generally adopts singly lifts one's head two-way cylinder, and in oil cylinder, stretching out of piston rod is controlled by the control valve beyond oil cylinder with withdrawal, and oil cylinder does not generally arrange control valve.Existing excavator oil cylinder due to need the control valve beyond with oil cylinder control stretch out and regain, and oil cylinder and control valve arranged apart, make the reaction velocity of oil cylinder slow.
Summary of the invention
For the problems referred to above existing for existing excavator oil cylinder, now provide a kind of excavator oil cylinder and the excavator with this oil cylinder.
The technological scheme that concrete technical solution problem adopts is:
A kind of excavator oil cylinder, comprise barrel-shaped cylinder body, piston rod and piston, described piston together stretches into after being connected with described piston rod in described cylinder body, described cylinder body is that described piston is separated into rod chamber and rodless cavity, wherein, comprise one and be connected to valve body on described cylinder body, described valve body comprises rodless cavity spool, rod chamber spool, rodless cavity hydraulic fluid port, rod chamber hydraulic fluid port, high pressure hydraulic fluid port and return opening, described rodless cavity hydraulic fluid port is connected with described rodless cavity, and described rod chamber hydraulic fluid port is connected with described rod chamber;
Described rodless cavity spool connects described rodless cavity hydraulic fluid port and described high pressure hydraulic fluid port when primary importance, and described rodless cavity spool connects described rodless cavity hydraulic fluid port and described return opening when the second place;
Described rod chamber spool connects described rod chamber hydraulic fluid port and described high pressure hydraulic fluid port when primary importance, and described rod chamber spool connects described rod chamber hydraulic fluid port and described return opening when the second place;
Described rodless cavity spool is connected with oil circuit control with described rod chamber spool, and described rod chamber spool is in the second place when making described rodless cavity spool be in primary importance, when described rodless cavity spool is in the second place, described rod chamber spool is in primary importance.
Preferably, wherein, described valve body is located at one end of nearly described rodless cavity on described cylinder body with the formal ring of flange.
Preferably, wherein, described rodless cavity hydraulic fluid port is connected with described rodless cavity by the through hole described cylinder body being positioned at rodless cavity position.
Preferably, wherein, described rod chamber hydraulic fluid port is connected with described rod chamber by a pipeline.
Preferably, wherein, described pipeline is formed primarily of the through hole and a steel pipe described cylinder body being positioned at described rod chamber position, and described steel pipe one end connects the through hole described cylinder body being positioned at described rod chamber position, and the other end connects described rod chamber hydraulic fluid port.
A kind of excavator, comprises above-mentioned excavator oil cylinder.
The beneficial effect of technique scheme is:
Oil cylinder and control valve centralized arrangement, oil cylinder reaction velocity is fast; Two valve rods control two hydraulic fluid ports of oil cylinder respectively, and the open nature of valve can design as requested, and system oil return pressure is low, can improve hydraulic system efficiency.
Accompanying drawing explanation
Fig. 1 is the Facad structure schematic diagram of the embodiment of a kind of excavator oil cylinder of the present invention;
Fig. 2 is the side, sectional structural representation of the embodiment of a kind of excavator oil cylinder of the present invention;
Fig. 3 is the control principle drawing of the embodiment of a kind of excavator oil cylinder of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described, but not as limiting to the invention.
As depicted in figs. 1 and 2, the embodiment of a kind of excavator oil cylinder of the present invention, comprise barrel-shaped cylinder body 1, piston rod 2 and piston 3, piston 3 together stretches into after being connected with piston rod 2 in cylinder body 1, cylinder body 1 is separated into rod chamber 4 and rodless cavity 5 for piston 3, wherein, comprise one and be connected to valve body 6 on cylinder body 1, valve body 6 comprises rodless cavity spool 61, rod chamber spool 62, rodless cavity hydraulic fluid port 63, rod chamber hydraulic fluid port 64, high pressure hydraulic fluid port 65 and return opening 66, rodless cavity hydraulic fluid port 63 is connected with rodless cavity 5, and rod chamber hydraulic fluid port 64 is connected with rod chamber 4; Rodless cavity spool 61 connects rodless cavity hydraulic fluid port 63 and high pressure hydraulic fluid port 65 when primary importance, and rodless cavity spool 61 connects rodless cavity hydraulic fluid port 63 and return opening 66 when the second place; Rod chamber spool 62 connects rod chamber hydraulic fluid port 64 and high pressure hydraulic fluid port 65 when primary importance, and rod chamber spool 62 connects rod chamber hydraulic fluid port 64 and return opening 66 when the second place; Rodless cavity spool 61 is connected with oil circuit control with rod chamber spool 62, and when making rodless cavity spool 61 be in primary importance, rod chamber spool 62 is in the second place, and when rodless cavity spool 61 is in the second place, rod chamber spool 62 is in primary importance.
The principle of the embodiment of the present invention, as shown in Figure 3, oil circuit control makes rodless cavity spool 61 be in primary importance according to operation, and when making rod chamber spool 62 be in the second place, rodless cavity hydraulic fluid port 63 and the high pressure hydraulic fluid port 65 of valve body 6 are connected by rodless cavity spool 61, rod chamber hydraulic fluid port 64 and return opening 66 are connected by rod chamber spool 62, high pressure oil in hydraulic circuit flows into rodless cavity 5 by high pressure hydraulic fluid port 65, and promote piston 3 piston rod 2 is stretched out, high pressure oil flows into rod chamber hydraulic fluid port 64 from rod chamber 4 subsequently, is flowed back in oil circuit by return opening 66.Oil circuit control makes rodless cavity spool 61 be in the second place according to operation, and when making rod chamber spool 62 be in primary importance, rod chamber hydraulic fluid port 64 and the high pressure hydraulic fluid port 65 of valve body 6 are connected by rod chamber spool 62, rodless cavity hydraulic fluid port 63 and return opening 66 are connected by rodless cavity spool 61, high pressure oil in hydraulic circuit flows into rod chamber 4 by high pressure hydraulic fluid port 65, and promote piston 3 piston rod 2 is regained, high pressure oil flows into rodless cavity hydraulic fluid port 63 from rodless cavity 5 subsequently, is flowed back in oil circuit by return opening 66.Valve body 6 is arranged on cylinder body 1 and makes oil cylinder and control valve centralized arrangement by the present invention, and oil cylinder reaction velocity is accelerated; And two hydraulic fluid ports of oil cylinder are controlled respectively by two valve rods, the open nature of valve can be changed by the Connecting format of adjustment with oil circuit control as requested, and system oil return pressure is low, can improve hydraulic system efficiency.
On technique scheme basis, further, valve body 6 is located at one end of nearly rodless cavity 5 on cylinder body 1 with the formal ring of flange, rodless cavity hydraulic fluid port 63 is connected with rodless cavity 5 by the through hole 51 cylinder body 1 being positioned at rodless cavity 5 position, rod chamber hydraulic fluid port 64 is connected with rod chamber 4 by a pipeline, pipeline can be formed by the through hole 41 and a steel pipe 7 cylinder body 1 being positioned at rod chamber 4 position, steel pipe 7 one end connects the through hole 41 cylinder body 1 being positioned at rod chamber 4 position, the other end connects rod chamber hydraulic fluid port 64, also can replace steel pipe 7 by the pipeline integrally formed with cylinder body 1.
A kind of excavator is also comprised, comprising the oil cylinder of above-mentioned excavator with control valve in the embodiment of the present invention.
The foregoing is only preferred embodiment of the present invention; not thereby claim of the present invention is limited; so all utilizations specification of the present invention and the change of the equivalent structure done by diagramatic content or the usual technological means of those skilled in the art are replaced, be all included in protection scope of the present invention.
Claims (4)
1. an excavator oil cylinder, comprise barrel-shaped cylinder body (1), piston rod (2) and piston (3), described piston (3) together stretches into after being connected with described piston rod (2) in described cylinder body (1), described cylinder body (1) is separated into rod chamber (4) and rodless cavity (5) for described piston (3), it is characterized in that, comprise one and be connected to valve body (6) on described cylinder body (1), described valve body (6) comprises rodless cavity spool (61), rod chamber spool (62), rodless cavity hydraulic fluid port (63), rod chamber hydraulic fluid port (64), high pressure hydraulic fluid port (65) and return opening (66), described rodless cavity hydraulic fluid port (63) is connected with described rodless cavity (5), described rod chamber hydraulic fluid port (64) is connected with described rod chamber (4),
Described rodless cavity spool (61) connects described rodless cavity hydraulic fluid port (63) and described high pressure hydraulic fluid port (65) when primary importance, and described rodless cavity spool (61) connects described rodless cavity hydraulic fluid port (63) and described return opening (66) when the second place;
Described rod chamber spool (62) connects described rod chamber hydraulic fluid port (64) and described high pressure hydraulic fluid port (65) when primary importance, and described rod chamber spool (62) connects described rod chamber hydraulic fluid port (64) and described return opening (66) when the second place;
Described rodless cavity spool (61) is connected with oil circuit control with described rod chamber spool (62), and described rod chamber spool (62) is in the second place when making described rodless cavity spool (61) be in primary importance, when described rodless cavity spool (61) is in the second place, described rod chamber spool (62) is in primary importance;
Described valve body (6) is located at one end of the upper nearly described rodless cavity (5) of described cylinder body (1) with the formal ring of flange;
Described rodless cavity hydraulic fluid port (63) is connected with described rodless cavity (5) by the through hole (51) described cylinder body (1) being positioned at rodless cavity (5) position.
2. excavator oil cylinder as claimed in claim 1, it is characterized in that, described rod chamber hydraulic fluid port (64) is connected with described rod chamber (4) by a pipeline.
3. excavator oil cylinder as claimed in claim 2, it is characterized in that, described pipeline is formed primarily of the through hole (41) and a steel pipe (7) described cylinder body (1) being positioned at described rod chamber (4) position, described steel pipe (7) one end connects the through hole (41) described cylinder body (1) being positioned at described rod chamber (4) position, and the other end connects described rod chamber hydraulic fluid port (64).
4. an excavator, comprises as the excavator oil cylinder as described in arbitrary in claim 1-3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210172764.XA CN102678663B (en) | 2012-05-30 | 2012-05-30 | Oil cylinder for excavator and excavator with cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210172764.XA CN102678663B (en) | 2012-05-30 | 2012-05-30 | Oil cylinder for excavator and excavator with cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102678663A CN102678663A (en) | 2012-09-19 |
| CN102678663B true CN102678663B (en) | 2015-05-20 |
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ID=46811054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210172764.XA Expired - Fee Related CN102678663B (en) | 2012-05-30 | 2012-05-30 | Oil cylinder for excavator and excavator with cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102678663B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102865264B (en) * | 2012-10-22 | 2015-09-16 | 三一重机有限公司 | A kind of hydrovalve and hydraulic valve bank |
| CN106429944B (en) * | 2016-11-01 | 2019-02-15 | 沈阳双壹市政工程有限公司 | A kind of gas lifting jack for excavator |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2235520Y (en) * | 1995-11-08 | 1996-09-18 | 冶金工业部重庆钢铁设计研究院 | Hydraulic cylinder |
| DE69602923T2 (en) * | 1995-02-25 | 1999-12-09 | Ultronics Ltd., Cheltenham | ELECTROHYDRAULIC PROPORTIONAL CONTROL VALVE DEVICE |
| CN101070707A (en) * | 2007-05-29 | 2007-11-14 | 三一重机有限公司 | Digger revolving-control method and system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10256923B4 (en) * | 2002-12-05 | 2013-10-24 | Liebherr-France S.A. | Method and device for motion damping of hydraulic cylinders of mobile machines |
-
2012
- 2012-05-30 CN CN201210172764.XA patent/CN102678663B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69602923T2 (en) * | 1995-02-25 | 1999-12-09 | Ultronics Ltd., Cheltenham | ELECTROHYDRAULIC PROPORTIONAL CONTROL VALVE DEVICE |
| CN2235520Y (en) * | 1995-11-08 | 1996-09-18 | 冶金工业部重庆钢铁设计研究院 | Hydraulic cylinder |
| CN101070707A (en) * | 2007-05-29 | 2007-11-14 | 三一重机有限公司 | Digger revolving-control method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102678663A (en) | 2012-09-19 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150520 Termination date: 20180530 |