CN201391511Y - Hydraulic cylinder cushioning device - Google Patents
Hydraulic cylinder cushioning device Download PDFInfo
- Publication number
- CN201391511Y CN201391511Y CN200920143518U CN200920143518U CN201391511Y CN 201391511 Y CN201391511 Y CN 201391511Y CN 200920143518 U CN200920143518 U CN 200920143518U CN 200920143518 U CN200920143518 U CN 200920143518U CN 201391511 Y CN201391511 Y CN 201391511Y
- Authority
- CN
- China
- Prior art keywords
- piston rod
- piston
- section
- blind hole
- vertical core
- 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
- 238000007667 floating Methods 0.000 claims abstract description 21
- 239000012530 fluid Substances 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000003139 buffering effect Effects 0.000 abstract description 15
- 239000010720 hydraulic oil Substances 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 14
- 238000000034 method Methods 0.000 description 7
- 238000013016 damping Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000010729 system oil Substances 0.000 description 1
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Abstract
The utility model provides a hydraulic cylinder cushioning device belonging to a hydraulic cylinder, which is characterized in that the left section, the middle section and the right section of a piston rod constitute from left to right in sequence form a cylindrical rod which increases in diameter and is provided with a left step and a right step, wherein, a piston is installed on the left section of the piston rod by using a nut, a floating sleeve with a flange on the right side is installed in slide fit on the middle section of the piston rod, a return spring is mounted between the flange edge of the floating sleeve and the piston, an axial central blind hole stretching to the right section is formed on the piston rod, the origin end of the central blind hole is sealed with a plug, a vertical hole I and a vertical II which are communicated with the central blind hole and a rod chamber respectively are formed at an interval on the middle section of the piston rod, and a vertical hole III which is communicated with the central blind hole and the rod chamber respectively is further formed on the right section of the piston rod. When the piston in the hydraulic cylinder withdraws approaching the end of the stroke, hydraulic oil is limited to flowing out from the vertical hole III through the central blind hole after passing through the vertical hole I and the vertical hole II, thereby achieving the purpose of buffering, eliminating mechanical collision between the piston and a guide sleeve, and prolonging the service life.
Description
Technical field
The utility model belongs to oil hydraulic cylinder, especially relates to a kind of hydraulic pressure cylinder cushion.
Background technique
At present, the method that is usually used in the terminal buffering of hydraulic cylinder travel has energy snubber method, off-load buffer method etc., and the energy snubber method adopts the slit buffering, and very high to the requirement on machining accuracy of oil hydraulic cylinder, buffer locations is also wanted heat treatment; The off-load buffer method arrives terminal when piston motion, makes the hyperbaric chamber fluid of oil hydraulic cylinder flow back to fuel tank, and this method can only be eliminated the impact that pressure can cause, can not eliminate the impact that inertial force causes; If during the terminal no damping device of hydraulic cylinder travel, oil hydraulic cylinder will hit the cylinder phenomenon, be between the piston of oil hydraulic cylinder and guide sleeve or the cylinder bottom mechanical impact to take place, life-span to oil hydraulic cylinder has a significant impact, simultaneously, the metal granule that bump produces is stayed in the hydraulic system, and hydraulic oil and other element are all had a significant impact.
Summary of the invention
The purpose of this utility model provides a kind of cylinder cushion device, solve the problem and shortage that present cylinder cushion device exists effectively, piston that elimination is caused because of the inertial force and the hydraulic coupling of piston and the mechanical impact between the guide sleeve prolong working life of oil hydraulic cylinder.
The purpose of this utility model is achieved like this: a kind of cylinder cushion device, comprise cylinder barrel, piston, piston rod and guide sleeve, piston is installed in piston rod one end Duan Shanghou cunning with nut and is contained in the inner chamber of cylinder barrel, offer hydraulic fluid port on the guide sleeve and be installed in the tail end of cylinder barrel, the other end Duan Ze of piston rod stretches out guide sleeve outward, it is characterized in that: the left side section of piston rod, stage casing and right section are made diameter from left to right successively and are with a left side from fine to coarse, the cylindrical bar of right double step, and left end section band outside thread is installed piston and the right flank of piston is resisted against on the left step surface of piston rod with nut on the section of the left side of piston rod; On the stage casing of piston rod, be the flanged floating bushing in the right side that is slidingly installed, the circumferential surface of the flange of this floating bushing and cylinder barrel inner peripheral surface are Spielpassung, and the right flank that makes floating bushing is resisted against on the right step surface of piston rod, between the flanged lip of piston and floating bushing Returnning spring is installed; Left end from piston rod, on piston rod, offer the axial centre blind hole of through right section and the end of rising of this central blind hole is sealed with plug, vertical core I and the vertical core II that communicates with central blind hole offered in the compartment of terrain on the stage casing of piston rod, this vertical core I and vertical core II communicate with the oil hydraulic cylinder rod chamber respectively again, and on the right section of piston rod, also offer the vertical core III that communicates with central blind hole, vertical core III then communicates with the hydraulic fluid port of rod chamber, piston in oil hydraulic cylinder is return, during near the hydraulic cylinder travel end, floating bushing supports runs into the oil hydraulic cylinder guide sleeve, at cylinder barrel, piston rod, form a close cavity between floating bushing and the hydraulic cylinder piston, the hydraulic oil of this sealing cavity volume can only flow out from vertical core III through the inside center blind hole by vertical core I and the vertical core II that offers on the piston rod, thereby reaches the buffering purpose; This damping device possesses permanent throttling buffering and two kinds of functions of variable throttling buffering, quantity by the throttling vertical core offered on the piston rod realizes, it is constant that permanent throttling is buffered in the vertical core quantity that plays buffer function in the buffering course, variable throttling is buffered in the vertical core number change that plays buffer function in the buffering course, along with the motion of piston has part vertical core such as vertical core II to be covered by floating bushing, the vertical core quantity that plays buffer function like this reduces gradually, is equivalent to cushion area and reduces gradually, thereby form the variable throttling buffering.
The cylinder cushion device that the utility model proposed, rational in infrastructure, use reliably, eliminate piston that inertial force and hydraulic coupling because of piston caused and the mechanical impact between the guide sleeve, prolong the working life of oil hydraulic cylinder.
Now in conjunction with the accompanying drawings and embodiments the cylinder cushion device that the utility model proposed is further described.
Description of drawings
Fig. 1 is the main cross-sectional schematic of the cylinder cushion device that proposes of the utility model.
Fig. 2 is the cross-sectional schematic of the A-A of part 1 locking nut among Fig. 1, part 3 pistons and part 4 piston rods.
Among Fig. 1, Fig. 2,1, locking nut 2, cylinder barrel 3, piston 4, piston rod 5, rod chamber 6, vertical core III 7, central blind hole 8, vertical core I 9, vertical core II 10, Returnning spring 11, floating bushing 12, guide sleeve 13, plug 14, hydraulic fluid port
Embodiment
From Fig. 1, among Fig. 2 as can be seen: a kind of cylinder cushion device, comprise cylinder barrel 2, piston 3, piston rod 4 and guide sleeve 12, the left side section that piston 3 usefulness locking nuts 1 are installed in piston rod 4 goes up that the back is sliding to be contained in the inner chamber of cylinder barrel 2, offer hydraulic fluid port 14 on the guide sleeve 12 and be installed in the right tail end of cylinder barrel 2, the other end section of the piston rod 4 then right side is stretched out guide sleeve 12, it is characterized in that: the left side section of piston rod 4, stage casing and right section are made diameter from fine to coarse and a band left side from left to right successively, the cylindrical bar of right step, be with outside thread on the left end section of piston rod 4, on the section of the left side of piston rod 4, piston 3 be installed and the right flank of piston 3 is resisted against on the left step surface of piston rod 4 with locking nut 1; On the stage casing of piston rod 4, be the flanged floating bushing 11 in the right side that is slidingly installed, the circumferential surface of the flange of this floating bushing 11 and cylinder barrel 2 inner peripheral surfaces are Spielpassung, and the right flank that makes floating bushing 11 is resisted against on the right step surface of piston rod 4 installation Returnning spring 10 between the flanged lip of piston 3 and floating bushing 11; Left end from piston rod 4, on piston rod 4, offer the axial centre blind hole 7 of through right section and the left part of this central blind hole 7 is sealed with plug 13, vertical core I8 and the vertical core II9 that communicates with central blind hole 7 offered in the compartment of terrain on the stage casing of piston rod 4, this vertical core I8 and vertical core II9 communicate with rod chamber 5 in the oil hydraulic cylinder respectively again, and on the right section of piston rod 4, also offering the vertical core III6 that communicates with central blind hole 7, vertical core III6 then communicates with the hydraulic fluid port 14 of rod chamber 5; Piston 3 in oil hydraulic cylinder is return, during near the hydraulic cylinder travel end, floating bushing 11 supports runs into oil hydraulic cylinder guide sleeve 12, between cylinder barrel 2, piston rod 4, floating bushing 11 and hydraulic cylinder piston 3, form a close cavity, the hydraulic oil of this sealing cavity volume can only flow out from vertical core III6 through inside center blind hole 7 by vertical core I8 and the vertical core II9 that offers on the piston rod 4, thereby reaches the buffering purpose; This damping device possesses permanent throttling buffering and two kinds of functions of variable throttling buffering, quantity by the vertical core offered on the piston rod 4 realizes, it is constant that permanent throttling is buffered in the vertical core quantity that plays buffer function in the buffering course, variable throttling is buffered in the vertical core number change that plays buffer function in the buffering course, along with the motion of piston 3 has part vertical core such as vertical core II9 to be covered by floating bushing 11, the vertical core quantity that plays buffer function like this reduces gradually, be equivalent to cushion area and reduce gradually, thereby form the variable throttling buffering.
Claims (1)
1, a kind of cylinder cushion device comprises cylinder barrel (2), piston (3), piston rod (4) and guide sleeve (12), it is characterized in that:
The left side section of a, piston rod (4), stage casing and right section are made diameter from left to right successively from fine to coarse and with the cylindrical bar of left and right step, be with outside thread on the left end section of piston rod (4), go up with locking nut (1) in the left side of piston rod (4) section and piston (3) is installed and the right flank of piston (3) is resisted against on the left step surface of piston rod (4);
B, on the stage casing of piston rod (4), be the flanged floating bushing in the right side that is slidingly installed (11), the inner peripheral surface of the circumferential surface of the flange of this floating bushing (11) and cylinder barrel (2) is Spielpassung, and the right flank that makes floating bushing (11) is resisted against on the right step surface of piston rod (4), between the flanged lip of piston (3) and floating bushing (11) Returnning spring (10) is installed;
C, from the left end of piston rod (4), on piston rod (4), offer the axial centre blind hole (7) of through right section and the left end of this central blind hole (7) is sealed with plug (13), vertical core I (8) and the vertical core II (9) that communicates with central blind hole (7) offered in the compartment of terrain on the stage casing of piston rod (4), this vertical core I (8) and vertical core II (9) communicate with the rod chamber (5) of oil hydraulic cylinder respectively again, and on the right section of piston rod (4), also offering the vertical core III (6) that communicates with central blind hole (7), vertical core III (6) then communicates with the hydraulic fluid port (14) of rod chamber (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920143518U CN201391511Y (en) | 2009-03-26 | 2009-03-26 | Hydraulic cylinder cushioning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920143518U CN201391511Y (en) | 2009-03-26 | 2009-03-26 | Hydraulic cylinder cushioning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201391511Y true CN201391511Y (en) | 2010-01-27 |
Family
ID=41598338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920143518U Expired - Fee Related CN201391511Y (en) | 2009-03-26 | 2009-03-26 | Hydraulic cylinder cushioning device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201391511Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162481A (en) * | 2011-04-29 | 2011-08-24 | 中航飞机起落架有限责任公司 | Actuator cylinder of built-in buffer load-reducing device |
| CN104121251A (en) * | 2014-07-17 | 2014-10-29 | 安徽易奇软件科技有限公司 | Buffering device for hydraulic cylinder |
| CN107676331A (en) * | 2017-10-31 | 2018-02-09 | 重庆维庆液压机械有限公司 | A kind of hydraulic jack for being used to discharge |
-
2009
- 2009-03-26 CN CN200920143518U patent/CN201391511Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162481A (en) * | 2011-04-29 | 2011-08-24 | 中航飞机起落架有限责任公司 | Actuator cylinder of built-in buffer load-reducing device |
| CN102162481B (en) * | 2011-04-29 | 2014-08-13 | 中航飞机起落架有限责任公司 | Actuator cylinder of built-in buffer load-reducing device |
| CN104121251A (en) * | 2014-07-17 | 2014-10-29 | 安徽易奇软件科技有限公司 | Buffering device for hydraulic cylinder |
| CN107676331A (en) * | 2017-10-31 | 2018-02-09 | 重庆维庆液压机械有限公司 | A kind of hydraulic jack for being used to discharge |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100127 Termination date: 20160326 |