CN101936318A - Hydraulic cylinder for improving buffering effect - Google Patents
Hydraulic cylinder for improving buffering effect Download PDFInfo
- Publication number
- CN101936318A CN101936318A CN2010105136175A CN201010513617A CN101936318A CN 101936318 A CN101936318 A CN 101936318A CN 2010105136175 A CN2010105136175 A CN 2010105136175A CN 201010513617 A CN201010513617 A CN 201010513617A CN 101936318 A CN101936318 A CN 101936318A
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- cylinder head
- cushion collar
- wall
- piston
- piston rod
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Abstract
The invention discloses a hydraulic cylinder for improving buffering effect, comprising a cylinder barrel and a cylinder head located at one end of the cylinder barrel. The cylinder head has a cylinder head hole through which a piston rod extends into the cylinder barrel; the part of the piston rod, which extends into the cylinder barrel, has a buffering sleeve mounting section with an orderly reduced outer diameter and a piston mounting section, wherein the piston mounting section is sleeved with a piston and the buffering sleeve mounting section is sleeved with a buffering sleeve; in the axial direction of the piston rod, the buffering sleeve is shorter than the buffering sleeve mounting section; the inner wall of the buffering sleeve is in clearance fit with the outer wall of the buffering sleeve mounting section; the outer wall of the buffering sleeve is provided with a copper material layer with the outer wall in clearance fit with the inner wall of the cylinder head hole. The beneficial effect of the invention is that the buffering sleeve can float under the function of hydraulic oil; furthermore, the outer wall of the buffering sleeve is provided with the copper material layer and the copper is soft, thereby the collision damage between the steel material and the cylinder head is prevented, and the floating buffering of the buffering sleeve is more reliable.
Description
Technical field
The present invention relates to the hydraulic machinery technical field, relate in particular to a kind of hydraulic jack.
Background technique
Hydraulic jack is the engineering mechanical components of using always, is made of cylinder barrel and the piston rod and the piston that are positioned at cylinder barrel, and the end that piston rod stretches into cylinder barrel inside is equipped with piston, and when hydraulic oil promoted piston, it is reciprocal that piston can drive piston rod.
The end that cylinder barrel inserts piston rod has cylinder head, and it is the cylinder head hole that cylinder head has through hole, is used to pass, the support piston bar, and also the limit position to piston rod movement has played the qualification effect.The sidewall of cylinder head has the hydraulic fluid port that is communicated with the cylinder head hole, is used for injecting and discharging hydraulic oil.
In the prior art, the end that piston rod is installed piston is the multidiameter shaft structure, be that the piston rod outer wall has ring-shaped step, the piston rod external diameter dwindles successively, wherein piston rod close on piston and the position between piston and cylinder head hole is provided with installation step, the external diameter at this installation step position less than piston rod directly and the external diameter of cylinder head hole mating part, and greater than the external diameter of the installation piston region of piston rod.
Outer wall around installation step is with cushion collar, make progress at piston rod, the length of cushion collar is greater than the length of installation step, because being installed, an end of piston back piston can be adjacent to installation step, and piston rod directly and the external diameter of cylinder head hole mating part greater than the external diameter of installation step, cushion collar will be fixedly clamped cushion collar outer wall and cylinder head hole inwall Spielpassung like this.
When cushion collar and piston when cylinder head moves, cushion collar enters in the cylinder head hole, by cylinder head, the hydraulic oil in the space that cylinder barrel and piston surround can only from cushion collar with and the gap in cylinder head hole discharge, thereby the hydraulic fluid flow rate reduction, played the effect of damper piston bar.
But when piston rod and cylinder head hole coaxality variation, can cause unbalance stress between cushion collar and the cylinder head hole, even the cushion collar part is impaired, influences cushioning effect in the prior art.
Summary of the invention
The invention provides a kind of good buffer effect, the hydraulic jack of the improvement cushioning effect of long service life.
A kind of hydraulic jack that improves cushioning effect, comprise cylinder barrel, be positioned at the cylinder head of cylinder barrel one end, described cylinder head has the cylinder head hole, piston rod stretches in the cylinder barrel by the cylinder head hole, in stretching into cylinder barrel, piston rod is partly with cushion collar construction section and the piston construction section that external diameter dwindles successively, wherein said piston construction section is set with piston, described cushion collar construction section is set with cushion collar, piston rod axially on, the length of described cushion collar is less than the length of cushion collar construction section, the outer wall Spielpassung of cushion collar inwall and cushion collar construction section, the outer wall of cushion collar has the copper product layer, when cushion collar moves in the cylinder head hole, the outer wall of the copper material bed of material and cylinder head hole inwall Spielpassung.
The thickness of the described copper material bed of material is 2～4mm, and the copper material bed of material can be formed on the outer wall of cushion collar by means such as built-up welding.
The sidewall of described cylinder head has the hydraulic fluid port that is communicated with the cylinder head hole, is used for injecting in cylinder barrel and discharging hydraulic oil.
The hydraulic fluid port that is positioned in described cylinder head hole is provided with seal ring away from the inwall of cylinder barrel one side, and sealing circle and piston rod outer wall are sealed and matched.
The outer wall of described piston is with seal ring, and the sealing circle cooperates with the inner wall sealing of cylinder barrel.
The invention has the beneficial effects as follows the length relation, the matching relationship that have changed existing cushion collar and cushion collar construction section, cushion collar can be floated under the effect of hydraulic oil, when piston rod and cylinder head hole coaxality variation, suitable change position is avoided being extruded impaired, prolong working life, guaranteed cushioning effect.The cushion collar outer wall has the copper product layer in addition, and is softer copperly, can avoid and the cylinder head of steel between collsion damage, the cushion collar buffering of floating is more reliable.
Description of drawings
Fig. 1 improves the generalized section of closing on the cylinder head position of the hydraulic jack of cushioning effect for the present invention.
Fig. 2 is an A part enlarged view among the figure.
Embodiment
Referring to accompanying drawing, a kind of hydraulic jack that improves cushioning effect of the present invention comprises cylinder barrel 4, is positioned at the cylinder head 2 of cylinder barrel 4 one ends, cylinder head 2 has the cylinder head hole, piston rod 1 stretches in the cylinder barrel 4 by the cylinder head hole, in stretching into cylinder barrel 4, piston rod 1 is partly with cushion collar construction section 9 and the piston construction section 10 that external diameter dwindles successively, wherein the outer race of piston construction section 5 is equipped with piston 5, and the outer race of cushion collar construction section is equipped with cushion collar 3.
The outer wall of cushion collar 3 has copper product layer 11, and the thickness of the copper material bed of material 11 is 2mm, and the copper material bed of material 11 is by carrying out the outer wall that surface treatment is formed on cushion collar 3 again after the built-up welding.
Piston rod 1 moves to cushion collar 3 left when being positioned at the cylinder head hole among the figure, the outer wall of the copper material bed of material 11 of cushion collar 3 outer walls and cylinder head hole inwall Spielpassung.Piston rod 1 axially on, the length h of cushion collar 3 is less than the length H of cushion collar construction section 9, the outer diameter d Spielpassung of cushion collar 3 inner diameter D and cushion collar construction section 9 is generally H8/e8.
The sidewall of cylinder head 2 has the hydraulic fluid port 7 that is communicated with the cylinder head hole, is used for injecting in cylinder barrel 4 and discharging hydraulic oil.The hydraulic fluid port 7 that is positioned in cylinder head hole is provided with seal ring 6 away from the inwall of cylinder barrel 4 one sides, and sealing circle 6 is sealed and matched with piston rod 1 outer wall.The outer wall of piston 5 is with seal ring 8, and sealing circle 8 cooperates with the inner wall sealing of cylinder barrel 4.
When hydraulic jack of the present invention uses, piston rod 1 and piston 5, cushion collar 3 move to cushion collar 3 left when entering the cylinder head hole among the figure, by cylinder head 2, hydraulic oil in the space that cylinder barrel 4 and piston 5 surround can only be discharged from the gap in the outer wall of the copper material bed of material 11 of cushion collar 3 and cylinder head hole, because reducing of hydraulic fluid flow rate cushioned the motion of piston rod 1.When piston rod 1 and cylinder head hole coaxality variation, because not pushing in the axial direction, piston 5 do not limit cushion collar 3, and cushion collar 3 all is a Spielpassung with cylinder head hole and piston rod 1, make cushion collar 3 energy radial floating automatic capturings, avoid cushion collar 1 cylindrical and cylinder head hole to squeeze and hinder, even the copper material bed of material 11 contacts with cylinder head hole inwall in addition, because the copper material bed of material 11 quality are softer, played buffer function, therefore also can not cause damage cushion collar 3.
Claims (5)
1. hydraulic jack that improves cushioning effect, comprise cylinder barrel, be positioned at the cylinder head of cylinder barrel one end, described cylinder head has the cylinder head hole, piston rod stretches in the cylinder barrel by the cylinder head hole, in stretching into cylinder barrel, piston rod is partly with cushion collar construction section and the piston construction section that external diameter dwindles successively, wherein said piston construction section is set with piston, described cushion collar construction section is set with cushion collar, it is characterized in that, piston rod axially on, the length of described cushion collar is less than the length of cushion collar construction section, the outer wall Spielpassung of cushion collar inwall and cushion collar construction section, the outer wall of cushion collar has the copper product layer, when cushion collar moves in the cylinder head hole, and the outer wall of the copper material bed of material and cylinder head hole inwall Spielpassung.
2. the hydraulic jack of improvement cushioning effect as claimed in claim 1 is characterized in that, the sidewall of described cylinder head has the hydraulic fluid port that is communicated with the cylinder head hole.
3. the hydraulic jack of improvement cushioning effect as claimed in claim 2 is characterized in that, the hydraulic fluid port that is positioned in described cylinder head hole is provided with seal ring away from the inwall of cylinder barrel one side, and sealing circle and piston rod outer wall are sealed and matched.
4. the hydraulic jack of improvement cushioning effect as claimed in claim 1 is characterized in that, the outer wall of described piston is with seal ring, and the sealing circle cooperates with the inner wall sealing of cylinder barrel.
5. as the hydraulic jack of each described improvement cushioning effect of claim 1～4, it is characterized in that the thickness of the described copper material bed of material is 2～4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105136175A CN101936318A (en) | 2010-10-20 | 2010-10-20 | Hydraulic cylinder for improving buffering effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105136175A CN101936318A (en) | 2010-10-20 | 2010-10-20 | Hydraulic cylinder for improving buffering effect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101936318A true CN101936318A (en) | 2011-01-05 |
Family
ID=43389827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105136175A Pending CN101936318A (en) | 2010-10-20 | 2010-10-20 | Hydraulic cylinder for improving buffering effect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101936318A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102155468A (en) * | 2011-04-27 | 2011-08-17 | 三一重工股份有限公司 | Hydraulic cylinder and cushioning device of hydraulic cylinder |
| CN103206426A (en) * | 2012-01-11 | 2013-07-17 | 广东科达机电股份有限公司 | Mould-clamping oil cylinder device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05296212A (en) * | 1992-04-17 | 1993-11-09 | Kubota Corp | Hydraulic cylinder |
| JP2005016631A (en) * | 2003-06-26 | 2005-01-20 | Shin Caterpillar Mitsubishi Ltd | Hydraulic cylinder |
| US20060151269A1 (en) * | 2005-01-03 | 2006-07-13 | Volvo Construction Equipment Holding Sweden Ab | Cylinder cushion device |
| CN201407239Y (en) * | 2009-03-30 | 2010-02-17 | 张伟 | Floating buffer structure of oil cylinder |
| CN201420725Y (en) * | 2009-03-20 | 2010-03-10 | 山东隆源液压科技有限公司 | Oil cylinder of big arm of digger |
| CN201599272U (en) * | 2010-01-08 | 2010-10-06 | 烟台未来自动装备有限责任公司 | High-speed rotation preventive cylinder for amusement equipment |
| CN201843851U (en) * | 2010-10-20 | 2011-05-25 | 小冶精通（天津）液压机械有限公司 | Hydraulic oil cylinder with improved buffering effect |
-
2010
- 2010-10-20 CN CN2010105136175A patent/CN101936318A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05296212A (en) * | 1992-04-17 | 1993-11-09 | Kubota Corp | Hydraulic cylinder |
| JP2005016631A (en) * | 2003-06-26 | 2005-01-20 | Shin Caterpillar Mitsubishi Ltd | Hydraulic cylinder |
| US20060151269A1 (en) * | 2005-01-03 | 2006-07-13 | Volvo Construction Equipment Holding Sweden Ab | Cylinder cushion device |
| CN201420725Y (en) * | 2009-03-20 | 2010-03-10 | 山东隆源液压科技有限公司 | Oil cylinder of big arm of digger |
| CN201407239Y (en) * | 2009-03-30 | 2010-02-17 | 张伟 | Floating buffer structure of oil cylinder |
| CN201599272U (en) * | 2010-01-08 | 2010-10-06 | 烟台未来自动装备有限责任公司 | High-speed rotation preventive cylinder for amusement equipment |
| CN201843851U (en) * | 2010-10-20 | 2011-05-25 | 小冶精通（天津）液压机械有限公司 | Hydraulic oil cylinder with improved buffering effect |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102155468A (en) * | 2011-04-27 | 2011-08-17 | 三一重工股份有限公司 | Hydraulic cylinder and cushioning device of hydraulic cylinder |
| CN102155468B (en) * | 2011-04-27 | 2013-07-03 | 三一重工股份有限公司 | Hydraulic cylinder and cushioning device of hydraulic cylinder |
| CN103206426A (en) * | 2012-01-11 | 2013-07-17 | 广东科达机电股份有限公司 | Mould-clamping oil cylinder device |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110105 |