CN201636127U - Buffering structure of hydraulic cylinder - Google Patents
Buffering structure of hydraulic cylinder Download PDFInfo
- Publication number
- CN201636127U CN201636127U CN2010201479877U CN201020147987U CN201636127U CN 201636127 U CN201636127 U CN 201636127U CN 2010201479877 U CN2010201479877 U CN 2010201479877U CN 201020147987 U CN201020147987 U CN 201020147987U CN 201636127 U CN201636127 U CN 201636127U
- Authority
- CN
- China
- Prior art keywords
- valve block
- piston rod
- buffering
- locknut
- hole
- 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
Links
Images
Landscapes
- Fluid-Damping Devices (AREA)
Abstract
The utility model relates to a buffering structure of a hydraulic cylinder, which comprises a piston rod, a piston which is sheathed on the piston rod, a cylinder body which is arranged at the outer side of the piston, and a cylinder bottom which is connected with the cylinder body and is provided with an oil transporting hole. The buffering structure is characterized in that a connection end between the cylinder bottom and the cylinder body is provided with a valve sheet lock nut; a buffering valve sheet is arranged between the valve sheet lock nut and the cylinder bottom; the valve sheet lock nut and the buffering valve sheet are provided with center holes; and the central line of the center holes is overlapped with that of the oil transporting hole. The buffering structure has the advantages of being capable of effectively preventing the piston rod from being stuck due to the inaccuracy of clearance control, and reducing the machining difficulty since the buffering valve sheet can float and the axiality requirement for parts such as the piston rod, the cylinder bottom and the like is lower.
Description
Technical field
The utility model belongs to the oil hydraulic cylinder technical field, particularly relates to a kind of oil hydraulic cylinder buffer structure.
Background technique
At present, buffering hydraulic cylinder of the prior art adopts " gap buffer " mostly, its structure is as shown in Figure 3: comprise piston rod, be sleeved on the piston on the piston rod, the cylinder body that is positioned at the piston outside and the cylinder bottom that is connected with cylinder body, described cylinder bottom is provided with the oil transportation hole, and design has certain radial clearance between oil transportation hole and the piston rod.Oil hydraulic cylinder in the course of the work, when piston rod movement and when entering into the oil transportation hole, the hydraulic oil in the oil hydraulic cylinder oil back chamber is extruded by the gap between piston rod and the oil transportation hole, and flow of fluid is obstructed, the movement velocity of piston slows down, thereby makes oil hydraulic cylinder reach cushioning effect.Buffering hydraulic cylinder with said structure is welded, the influence of factor such as processing, and the gap control between piston rod and the oil transportation hole is inaccurate, when the gap is too small, piston rod and cylinder bottom friction often occur, occurs stuck phenomenon when serious.
Summary of the invention
The utility model provides a kind of simple in structure, good buffer effect for solving the technical problem that exists in the known technology, and oil hydraulic cylinder buffer structure that can the contaminated liquid pressing system.
The technological scheme that the utility model is taked for the technical problem that exists in the solution known technology is: a kind of oil hydraulic cylinder buffer structure, comprise piston rod, be sleeved on the piston on the piston rod, the cylinder body that is positioned at the piston outside and the cylinder bottom that has the oil transportation hole that is connected with cylinder body, it is characterized in that: on the cylinder body connecting end of described cylinder bottom the valve block locknut is installed, be provided with the buffering valve block between valve block locknut and the cylinder bottom, be equipped with center hole on valve block locknut and the buffering valve block, and the center line of valve block locknut center hole overlaps with the center line in oil transportation hole.
The utility model can also adopt following technological scheme: be equipped with radial clearance between the center hole of the center hole of described piston rod and oil transportation hole, valve block locknut and buffering valve block.
Radial clearance between the center hole of described piston rod and buffering valve block is less than the radial clearance between the center hole of piston rod and oil transportation hole and valve block locknut.
Be provided with radial clearance between described buffering valve block and the cylinder bottom.
Described valve block locknut is provided with mounting hole.
Described buffering valve block is made by tin bronze.
Advantage and the good effect that the utlity model has are: because the utility model adopts technique scheme.Promptly have the end that the cylinder bottom in oil transportation hole is connected with cylinder body and be provided with the valve block locknut, the buffering valve block is arranged between valve block locknut and the cylinder bottom.Be equipped with center hole on valve block locknut and the buffering valve block, and be equipped with radial clearance between the center hole of the center hole of valve block locknut, buffering valve block and the oil transportation hole of cylinder bottom and the piston rod, the radial clearance between the center hole of piston rod and buffering valve block is less than the radial clearance between the center hole of piston rod and oil transportation hole and valve block locknut.Be provided with radial clearance between cylinder bottom and the buffering valve block, but feasible buffering valve block radial floating.In the buffer structure of above-mentioned oil hydraulic cylinder, when piston rod movement and enter into buffering during valve block, hydraulic oil needs to extrude by the center hole of buffering valve block and the gap between the piston rod, produce the oil return resistance to realize buffering with this, because the oil transportation hole and the gap between the piston rod of the center hole of valve block locknut, cylinder bottom are enough big, and the buffering valve block is in the radial floating state, has effectively avoided the piston rod stuck phenomenon that produces because of gap control is inaccurate.
Description of drawings
Fig. 1 is a structural representation of the present utility model; Fig. 2 is an A portion enlarged view among Fig. 1; Fig. 3 is the prior art constructions schematic representation.
Among the figure: 1, cylinder body; 2, piston; 3, piston rod; 4, cylinder bottom; 5, oil transportation hole; 6, buffering valve block; 7, valve block locknut; 8, mounting hole; 9, center hole.
Embodiment
For further understanding summary of the invention of the present utility model, characteristics and effect, now exemplify following examples, and conjunction with figs. is described in detail as follows: see also Fig. 1 and Fig. 2, a kind of oil hydraulic cylinder buffer structure, comprise piston rod 3, be sleeved on the piston 2 on the piston rod 3, piston 2 moves in cylinder body 1, and cylinder body 1 is connected with the cylinder bottom 4 that has oil transportation hole 5.An end that is connected with cylinder body 1 on the described cylinder bottom 4 is equipped with valve block locknut 7 by screw thread, valve block locknut 7 is provided with center hole 9, be provided with mounting hole 8 around center hole 9 on the valve block locknut 7, mounting hole 8 personnel that are convenient to operation install valve block locknut 7 and be fastened on the cylinder bottom 4.Be provided with the buffering valve block of being made by tin bronze 6 between valve block locknut 7 and the cylinder bottom 4, the center line of the center hole 9 of valve block locknut 7 overlaps with the center line in oil transportation hole 5, and the effect of valve block locknut 7 is the axial displacement of restriction buffering valve block 6.Be provided with radial clearance between the center hole 9 of the center hole 9 of described piston rod 3 and oil transportation hole 5, valve block locknut 7 and buffering valve block 6, radial clearance between the center hole 9 of piston rod 3 and buffering valve block 6 is less than the radial clearance between the center hole 9 of piston rod 3 and oil transportation hole 5 and valve block locknut 7, be provided with radial clearance between cylinder bottom 4 and the buffering valve block 6, make the buffering valve block between valve block locknut and cylinder bottom, be in the radial floating state.Present embodiment is that cylinder diameter is 100mm, diameter of piston rod is 60mm, the piston rod stroke is the oil hydraulic cylinder of 850mm, wherein the radial clearance between piston rod 3 and the oil transportation hole 5 is 3.5mm, radial clearance between the center hole 9 of piston rod 3 and valve block locknut 7 is 1.5mm, and the radial clearance between the center hole 9 of piston rod 3 and buffering valve block 6 is divided into 0.4mm.
In the working principle oil hydraulic cylinder oil return process, when piston rod 3 does not enter into the center hole 9 of valve block locknut 7, hydraulic oil is by center hole 9 and mounting hole 8, the center hole 9 of buffering valve block 6 and oil transportation hole 5 oil returns of cylinder bottom 4 of valve block locknut 7, piston rod 3 motion and when entering into the center hole 9 of buffering valve block 6, hydraulic oil is extruded from the center hole 9 of buffering valve block 6 and the radial clearance between the piston rod 3, because the flow velocity of hydraulic oil diminishes, thereby form the oil return resistance to realize buffering.In the utility model,, and cushion valve block 6 and be in quick condition, effectively avoided piston rod 3 stuck phenomena that produce because of gap control is inaccurate because oil transportation hole 5 and the radial clearance between the piston rod 3 of the center hole 9 of valve block locknut 7, cylinder bottom 4 are enough big.
Claims (6)
1. oil hydraulic cylinder buffer structure, comprise piston rod, be sleeved on the piston on the piston rod, the cylinder body that is positioned at the piston outside and the cylinder bottom that has the oil transportation hole that is connected with cylinder body, it is characterized in that: on the cylinder body connecting end of described cylinder bottom the valve block locknut is installed, be provided with the buffering valve block between valve block locknut and the cylinder bottom, be equipped with center hole on valve block locknut and the buffering valve block, and the center line of valve block locknut center hole overlaps with the center line in oil transportation hole.
2. oil hydraulic cylinder buffer structure according to claim 1 is characterized in that: be equipped with radial clearance between the center hole of the center hole of described piston rod and oil transportation hole, valve block locknut and buffering valve block.
3. oil hydraulic cylinder buffer structure according to claim 2 is characterized in that: the radial clearance between the center hole of described piston rod and buffering valve block is less than the radial clearance between the center hole of piston rod and oil transportation hole and valve block locknut.
4. oil hydraulic cylinder buffer structure according to claim 1 is characterized in that: be provided with radial clearance between described buffering valve block and the cylinder bottom.
5. oil hydraulic cylinder buffer structure according to claim 1 is characterized in that: described valve block locknut is provided with mounting hole.
6. oil hydraulic cylinder buffer structure according to claim 1 is characterized in that: described buffering valve block is made by tin bronze.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201479877U CN201636127U (en) | 2010-04-01 | 2010-04-01 | Buffering structure of hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201479877U CN201636127U (en) | 2010-04-01 | 2010-04-01 | Buffering structure of hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201636127U true CN201636127U (en) | 2010-11-17 |
Family
ID=43080618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201479877U Expired - Fee Related CN201636127U (en) | 2010-04-01 | 2010-04-01 | Buffering structure of hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201636127U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102434523A (en) * | 2011-11-11 | 2012-05-02 | 江苏吉信远望船舶设备有限公司 | Floating type buffering oil cylinder |
| CN103352958B (en) * | 2013-07-02 | 2016-03-23 | 太原理工大学 | A kind of hydraulic pressure cylinder cushion |
-
2010
- 2010-04-01 CN CN2010201479877U patent/CN201636127U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102434523A (en) * | 2011-11-11 | 2012-05-02 | 江苏吉信远望船舶设备有限公司 | Floating type buffering oil cylinder |
| CN103352958B (en) * | 2013-07-02 | 2016-03-23 | 太原理工大学 | A kind of hydraulic pressure cylinder cushion |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203146480U (en) | Rod-less cavity side buffer structure for hydraulic cylinder | |
| CN204061414U (en) | Steady buffering type lift oil tank | |
| CN102705291A (en) | Oil cylinder capable of passing oil by piston rod | |
| CN102434530A (en) | Differential-type plunger composite oil cylinder | |
| CN201636127U (en) | Buffering structure of hydraulic cylinder | |
| CN104214168B (en) | A kind of bilaterally adjustable Quick cylinder of power output | |
| CN201489118U (en) | Cylinder type vibroseis vibrator | |
| CN107165886A (en) | The external buffer structure of angling cylinder | |
| CN201330768Y (en) | Floating type cushioning device for hydraulic cylinder | |
| CN202348814U (en) | Reciprocating type movable composite oil cylinder | |
| CN201391501Y (en) | Buffering hydraulic cylinder | |
| CN102720167B (en) | Supporting device used for supporting oil cylinder | |
| CN102530780B (en) | Hydraulic pipeline system for forklift two-section full-free gantry | |
| CN201293003Y (en) | Double-action plunger type oil cylinder | |
| CN202322195U (en) | Stable jack oil cylinder | |
| CN2908909Y (en) | Hydraulic buffer with reducing cylinder | |
| CN201391511Y (en) | Hydraulic cylinder cushioning device | |
| CN202251956U (en) | Floating gap seal with high speed, high frequency and high abrasion resistance | |
| CN203130650U (en) | Automatic flow control valve for load-change hydraulic system | |
| CN201296938Y (en) | Large arm oil cylinder of excavator | |
| CN102889262A (en) | Combined type hydraulic cylinder with floating cylinder barrel | |
| CN202482015U (en) | Hydraulic pipeline system for two-section full-free gantry of forklift | |
| CN201407239Y (en) | Floating buffer structure of oil cylinder | |
| CN103148040B (en) | Automatic flow regulating valve for load conversion hydraulic system | |
| CN202628667U (en) | Actuator cylinder with terminal function |
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: 20101117 Termination date: 20150401 |
|
| EXPY | Termination of patent right or utility model |