CN201296938Y - Large arm oil cylinder of excavator - Google Patents
Large arm oil cylinder of excavator Download PDFInfo
- Publication number
- CN201296938Y CN201296938Y CNU2008201720230U CN200820172023U CN201296938Y CN 201296938 Y CN201296938 Y CN 201296938Y CN U2008201720230 U CNU2008201720230 U CN U2008201720230U CN 200820172023 U CN200820172023 U CN 200820172023U CN 201296938 Y CN201296938 Y CN 201296938Y
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- CN
- China
- Prior art keywords
- piston
- cylinder
- cushion collar
- piston rod
- buffering
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a large arm oil cylinder of an excavator, which is characterized in that one end of a piston rod is provided with a piston; one side of the piston, which is adjacent to the piston, is provided with a floating cushion collar which is sleeved on the piston rod; the floating cushion collar is a columniform cylinder with the inner wall being columniform and the outer wall being slantwise a little; a guide sleeve is connected with one end of the cylinder through a thread; and a columniform hole communicated with an oil pipe is also arranged in the guide sleeve. The floating cushion collar is adopted for the novel large arm oil cylinder, which is a bran-new method for the buffering of hydraulic cylinders, and floating buffering displayed by a pressure curve which is set up by buffering pressure design is more approximate to uniformly decelerating buffering.
Description
Technical field
The utility model relates to middle and high compressing cylinder, is specifically related to the big arm oil cylinder of excavator.
Background technology
At present excavator frequency of utilization height, operating mode characteristics such as the speed of service is fast, the big arm oil cylinder of excavator is installed in the lowermost end of single armed, link to each other with car body, when piston rod reaches the longest end, can produce very big impact force, make the car body chatter, reduce the application life of component.
Summary of the invention
The utility model is at present actual conditions, designed and developed out the oil cylinder that the rod chamber end has pooling feature, can reduce to minimum to excessive speed and spike hydraulic pressure, realizes even the deceleration by setting up constant compression force between deceleration period.
The utility model is achieved through the following technical solutions: the big arm oil cylinder of a kind of excavator, mainly form by piston rod, cylinder barrel, piston, cylinder bottom, end at piston rod is provided with piston, be provided with a unsteady cushion collar that is linked on the piston rod at a side place of being adjacent of piston, unsteady cushion collar is that an inwall is cylindrical, the cylindrical tube that outer wall slightly tilts, fairlead also is provided with the cylindrical hole that connects with oil pipe by being threaded in an end of cylinder barrel in fairlead.Fairlead is positioned at the front end of oil cylinder, and when entering the buffer area, wherein working connection is stopped up not oil return by unsteady cushion collar, oil can only be from the gap oil return of cylindrical hole and the fairlead and the cushion collar of fairlead side, recirculating oil quantity is reduced gradually, thereby reach buffering effect, underspeed gently.
This novel oil cylinder adopts the cushion collar that floats, and is the completely new approach in the hydraulic cylinder buffering, and the pressure curve of being set up by the compensator or trimmer pressure designing institute demonstrates the buffering of floating more can be near even deceleration buffer.
Description of drawings
Now in conjunction with the accompanying drawings the utility model is further described
Fig. 1 is a main sectional view of the present utility model
Fig. 2 is a vertical view of the present utility model
Among the figure 1, piston rod 2, fairlead 3, cylinder barrel 4, cushion collar 5, piston 6, cylinder bottom 7, oil pipe 8, oil pipe float
The specific embodiment
As shown in Figure 1, 2, the utility model mainly comprises piston rod 1, fairlead 2, cylinder barrel 3, cushion collar 4, piston 5, cylinder bottom 6 float.End at cylinder barrel 3 is provided with fairlead 2, the other end is provided with cylinder bottom 6, one end of oil pipe 7 is connected with cylindrical hole in the fairlead 2, one end of oil pipe 8 is connected with oilhole in the cylinder bottom 6, piston rod 1 is located in the cylinder barrel 3 by fairlead 2, end at piston rod 1 is provided with piston 5, be provided with a unsteady cushion collar 4 that is linked on the piston rod 1 at a side place of being adjacent of piston 5, the cushion collar 4 that floats is that an inwall is cylindrical, the cylindrical tube that outer wall slightly tilts, fairlead 2 also is provided with the cylindrical hole that connects with oil pipe by being threaded in an end of cylinder barrel in fairlead.
The utility model course of work is as follows: when piston rod 1 reaches end, the cushion collar 4 that floats is parts that high-abrasive material is made, its empty boasting on piston rod 1, with piston rod 1 gap greater than 0.5mm, so that be adjusted into automatically with cushion hole concentric, thereby do not pulled.Unsteady cushion collar 4 external diameters and fairlead 2 cushion hole internal diameters are little matched in clearance, guarantee gap and precision by last grinding of grinding after the first turning.Unsteady cushion collar 4 right flanks and piston 5 left surfaces leave gap 0.5～1mm, when the cushion collar 4 that floats has just advanced people's cushion hole, on the face of cushion collar 4 that floats, set up certain pressure owing to the formation of throttling, it is enough to unsteady cushion collar 4 is pressed against on piston 5 end faces tightly and forms end face seal, and at this moment fluid can't pass through the oil return of cushion collar internal clearance; When the cushion collar 4 that floats enters cushion hole, make cylindrical hole and the gap oil return of the hydraulic oil in chamber, a hydraulic cylinder left side by the fairlead side, when piston 5 during near the stroke end, speed has descended a lot, at this moment whole buffering course end.
Claims (1)
1, the big arm oil cylinder of a kind of excavator, mainly form by piston rod, cylinder barrel, piston, cylinder bottom, it is characterized in that: the end at piston rod is provided with piston, be provided with a unsteady cushion collar that is linked on the piston rod at a side place of being adjacent of piston, unsteady cushion collar is that an inwall is cylindrical, the cylindrical tube that outer wall slightly tilts, fairlead also is provided with the cylindrical hole that connects with oil pipe by being threaded in an end of cylinder barrel in fairlead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201720230U CN201296938Y (en) | 2008-09-26 | 2008-09-26 | Large arm oil cylinder of excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201720230U CN201296938Y (en) | 2008-09-26 | 2008-09-26 | Large arm oil cylinder of excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201296938Y true CN201296938Y (en) | 2009-08-26 |
Family
ID=41042915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201720230U Expired - Fee Related CN201296938Y (en) | 2008-09-26 | 2008-09-26 | Large arm oil cylinder of excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201296938Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102900723A (en) * | 2012-11-16 | 2013-01-30 | 江阴市洪腾机械有限公司 | Front buffering type hydraulic cylinder |
| CN106593985A (en) * | 2015-10-14 | 2017-04-26 | 安徽华尔泰化工股份有限公司 | Gas making workshop hydraulic oil cylinder |
-
2008
- 2008-09-26 CN CNU2008201720230U patent/CN201296938Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102900723A (en) * | 2012-11-16 | 2013-01-30 | 江阴市洪腾机械有限公司 | Front buffering type hydraulic cylinder |
| CN106593985A (en) * | 2015-10-14 | 2017-04-26 | 安徽华尔泰化工股份有限公司 | Gas making workshop hydraulic oil cylinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090826 Termination date: 20110926 |