CN101963168A - Hydro-cylinder for performing buffering by using floating one-way valve sheet - Google Patents
Hydro-cylinder for performing buffering by using floating one-way valve sheet Download PDFInfo
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- CN101963168A CN101963168A CN2010105135134A CN201010513513A CN101963168A CN 101963168 A CN101963168 A CN 101963168A CN 2010105135134 A CN2010105135134 A CN 2010105135134A CN 201010513513 A CN201010513513 A CN 201010513513A CN 101963168 A CN101963168 A CN 101963168A
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- valve sheet
- check valve
- piston rod
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- hydraulic oil
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Abstract
The invention discloses a hydro-cylinder for performing buffering by using a floating one-way valve sheet. The hydro-cylinder comprises a cylinder barrel, and a piston rod and a piston located in the cylinder barrel, wherein a hydraulic oil channel with the opening is arranged at the bottom of the cylinder barrel, and the opening faces to the piston rod; ring-shaped steps are formed on the inner wall of the opening of the hydraulic channel; a check ring is fixed on the inner wall at one side of the opening, and the one side is close to the piston rod; and a one-way valve sheet arranged between the checking ring and the ring-shaped steps is provided with a mesopore in clearance fit with the piston rod and a grooved edge in clearance fit with the inner wall of the opening of the hydraulic channel. The invention has the following beneficial effects: the one-way valve sheet is in clearance fit with both the inner wall of the opening of the hydraulic channel and the piston rod, thus enabling the one-way valve sheet to float in the radial direction to further change the position thereof, preventing the one-way valve sheet or the inner wall of the hydraulic channel from being deformed by extrusion, prolonging the service life of the one-way valve sheet and guaranteeing the stability of the buffering effect.
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 afterbody that piston rod stretches into the inner end of cylinder barrel is commonly referred to as buffer plunger, and buffer plunger can partly match with the cylinder bottom of cylinder barrel, realizes buffering to piston rod movement by the flow of control hydraulic oil.In order to cooperate with buffer plunger, partly be provided with hydraulic oil channel at cylinder bottom, and buffer unit is set in passage, when buffer plunger stretches into the inlet of cylinder bottom hydraulic oil channel, buffer unit can make hydraulic fluid flow rate change, piston rod movement speed slows down, until piston rod movement to limit position.
But buffer unit for example cooperates closelyr in the prior art between the hydraulic oil channel inwall of excircle and the cylinder bottom of check valve sheet, and when the mesopore concentricity of buffer plunger and check valve sheet was not high, check valve sheet might be subjected to the extruding of buffer plunger and damage.
Summary of the invention
The invention provides a kind of good buffer effect, the hydraulic jack that the check valve sheet that the utilization of long service life is floated cushions improves check valve sheet wherein.
A kind of hydraulic jack that utilizes unsteady check valve sheet to cushion, the piston rod and the piston formation that comprise cylinder barrel and be positioned at cylinder barrel, cylinder bottom at cylinder barrel partly is provided with the hydraulic oil channel of opening towards piston rod, the inwall of the opening part of described hydraulic oil channel has ring-shaped step, the inwall that closes on a side of piston rod at opening is fixed with back-up ring, between back-up ring and described ring-shaped step, be placed with described check valve sheet, this check valve sheet has mesopore and edge fluting, mesopore and piston rod Spielpassung, the inwall Spielpassung of check valve sheet edge and hydraulic oil channel opening part, when described piston rod stretches into hydraulic oil channel, check valve sheet is adjacent to the step surface of described ring-shaped step, and hydraulic oil flows into hydraulic oil channel from the gap of piston rod outer wall and mesopore inwall.
The edge of described check valve sheet is evenly distributed to few two grooves, and all grooves are all along the edge of piston rod to the perforation check valve sheet.As even six grooves that distribute in the edge of preferred described check valve sheet.
The mesopore of described check valve sheet has chamfering towards a side margin of piston rod, is convenient to guide piston rod to stretch into the mesopore of check valve sheet.
The invention has the beneficial effects as follows check valve sheet is improved, when piston rod stretches into hydraulic oil channel, because the inwall and the piston rod of the opening part of check valve sheet and hydraulic oil channel all are Spielpassung, so just can suitably float and change the position, avoid extrusion-deformation with piston rod or hydraulic oil channel inwall, prolong check valve sheet working life, guarantee the stable of cushioning effect.
Description of drawings
Fig. 1 is the cross-sectional view at hydraulic jack cylinder bottom of the present invention position;
Fig. 2 is the structural representation of check valve sheet among Fig. 1;
Fig. 3 is the side view of check valve sheet among Fig. 2.
Embodiment
Referring to accompanying drawing, a kind of hydraulic jack that utilizes unsteady check valve sheet to cushion of the present invention comprises cylinder barrel 3 and is positioned at the piston rod 2 of cylinder barrel 3 and piston 1 constitutes, and is provided with the hydraulic oil channel of opening towards piston rod 2 at the cylinder bottom 6 of cylinder barrel 3.
Piston rod 2 is when cylinder bottom 6 motions, and the termination of piston rod 2 (buffer plunger) can stretch in the hydraulic oil channel by its opening.
The inwall of the opening part of hydraulic oil channel has ring-shaped step, and the inwall that closes on a side of piston rod 2 at opening is fixed with back-up ring 4, is placed with check valve sheet 5 between back-up ring 4 and ring-shaped step, and the position of check valve sheet 5 is subjected to the qualification of back-up ring 4 and ring-shaped step.
Check valve sheet 5 has even six grooves that distribute of mesopore and edge, all grooves all axially connect the edge of check valve sheet 5 along piston rod 2, the mesopore of check valve sheet 5 has chamfering towards a side margin of piston rod 2, is convenient to guide piston rod 2 to stretch into the mesopore of check valve sheet 5.
The mesopore of check valve sheet 5 and piston rod 2 Spielpassung, the inwall Spielpassung of check valve sheet 5 edges and hydraulic oil channel opening part.
Hydraulic oil buffering course of the present invention is as follows:
When piston rod 2 moves to right, when the buffer plunger of piston rod 2 ends enters the mesopore of check valve sheet 5, hydraulic fluid pressure makes the step surface applying sealing of the A face and the ring-shaped step of check valve sheet 5, by cylinder bottom 6, hydraulic oil in the space that cylinder barrel 3 and piston 1 surround can only be discharged from the gap between the mesopore of buffering plunger and check valve sheet 5, because hydraulic fluid flow rate reduces, played the effect of damper piston bar 2 motions.
When piston rod moves to left, the input pressure of hydraulic oil channel promotion check valve sheet 5 moves to left in the cylinder bottom 6, until being blocked by back-up ring 4, the A face of check valve sheet 5 and the step surface of ring-shaped step are gapped, the B face of check valve sheet 5 and back-up ring are fitted, hydraulic oil can be through the notch (this legend is 6 grooves) on check valve sheet 5 outer rims by check valve sheet 5, and check valve sheet 5 has the effect of one-way valve, need not process and install independent one-way valve on cylinder bottom 6.Check valve sheet 5 has bigger gap with mounting hole (opening part of hydraulic oil channel) on the cylinder bottom 6, can radial floating, and prevent to squeeze mutually between the mesopore of buffer plunger and check valve sheet 5 and hinder.
Claims (4)
1. hydraulic jack that the check valve sheet of utilize floating cushions, the piston rod and the piston formation that comprise cylinder barrel and be positioned at cylinder barrel, cylinder bottom at cylinder barrel partly is provided with the hydraulic oil channel of opening towards piston rod, it is characterized in that, the inwall of the opening part of described hydraulic oil channel has ring-shaped step, the inwall that closes on a side of piston rod at opening is fixed with back-up ring, between back-up ring and described ring-shaped step, be placed with described check valve sheet, this check valve sheet has mesopore and edge fluting, mesopore and piston rod Spielpassung, the inwall Spielpassung of check valve sheet edge and hydraulic oil channel opening part, when described piston rod stretches into hydraulic oil channel, check valve sheet is adjacent to the step surface of described ring-shaped step, and hydraulic oil flows into hydraulic oil channel from the gap of piston rod outer wall and mesopore inwall.
2. the hydraulic jack that the check valve sheet that utilization as claimed in claim 1 is floated cushions is characterized in that, the edge of described check valve sheet is evenly distributed to few two grooves, and all grooves are all along the edge of piston rod to the perforation check valve sheet.
3. the hydraulic jack that the check valve sheet that utilization as claimed in claim 2 is floated cushions is characterized in that the edge of described check valve sheet is evenly distributed with six grooves.
4. the hydraulic jack that the check valve sheet that utilization as claimed in claim 3 is floated cushions is characterized in that the mesopore of described check valve sheet has chamfering towards a side margin of piston rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105135134A CN101963168A (en) | 2010-10-20 | 2010-10-20 | Hydro-cylinder for performing buffering by using floating one-way valve sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105135134A CN101963168A (en) | 2010-10-20 | 2010-10-20 | Hydro-cylinder for performing buffering by using floating one-way valve sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101963168A true CN101963168A (en) | 2011-02-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105135134A Pending CN101963168A (en) | 2010-10-20 | 2010-10-20 | Hydro-cylinder for performing buffering by using floating one-way valve sheet |
Country Status (1)
| Country | Link |
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| CN (1) | CN101963168A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102192214A (en) * | 2011-04-02 | 2011-09-21 | 肇庆市志成气动有限公司 | High-reliability oscillating cylinder |
| 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 |
| CN102900727A (en) * | 2012-11-14 | 2013-01-30 | 徐州中矿大贝克福尔科技有限公司 | Device and method for buffering main oil cylinder of paste filling pump in coal mine |
| CN110159615A (en) * | 2019-04-26 | 2019-08-23 | 平高集团有限公司 | The working cylinder of cushion collar and the hydraulic device using the cushion collar |
| CN110159610A (en) * | 2019-04-26 | 2019-08-23 | 平高集团有限公司 | The plug and hydraulic device working cylinder of hydraulic device working cylinder |
| CN110242640A (en) * | 2019-04-26 | 2019-09-17 | 平高集团有限公司 | The working cylinder and hydraulic actuating mechanism of cushion collar, hydraulic device |
| CN114962388A (en) * | 2022-07-29 | 2022-08-30 | 江苏恒立液压股份有限公司 | Buffer piston and oil cylinder with same |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4397218A (en) * | 1980-12-23 | 1983-08-09 | Allis-Chalmers Corporation | Cushion stop for hydraulic cylinder |
| CN1272167A (en) * | 1998-05-29 | 2000-11-01 | 日立建机株式会社 | Oil hydraulic cylinder |
| WO2006014514A2 (en) * | 2004-07-08 | 2006-02-09 | Burns Sr Patrick J | Fluid power unit having closed circuit |
| CN201396336Y (en) * | 2009-03-26 | 2010-02-03 | 杭州西子船舶液压工程机械有限公司 | Lifting cylinder with buffer device for forklift truck |
| CN201412408Y (en) * | 2009-06-17 | 2010-02-24 | 江苏恒立高压油缸有限公司 | Floating type buffering hydro cylinder |
| CN201843858U (en) * | 2010-10-20 | 2011-05-25 | 小冶精通（天津）液压机械有限公司 | Hydraulic oil cylinder using floating one-way valve plate for cushioning |
-
2010
- 2010-10-20 CN CN2010105135134A patent/CN101963168A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4397218A (en) * | 1980-12-23 | 1983-08-09 | Allis-Chalmers Corporation | Cushion stop for hydraulic cylinder |
| CN1272167A (en) * | 1998-05-29 | 2000-11-01 | 日立建机株式会社 | Oil hydraulic cylinder |
| WO2006014514A2 (en) * | 2004-07-08 | 2006-02-09 | Burns Sr Patrick J | Fluid power unit having closed circuit |
| CN201396336Y (en) * | 2009-03-26 | 2010-02-03 | 杭州西子船舶液压工程机械有限公司 | Lifting cylinder with buffer device for forklift truck |
| CN201412408Y (en) * | 2009-06-17 | 2010-02-24 | 江苏恒立高压油缸有限公司 | Floating type buffering hydro cylinder |
| CN201843858U (en) * | 2010-10-20 | 2011-05-25 | 小冶精通（天津）液压机械有限公司 | Hydraulic oil cylinder using floating one-way valve plate for cushioning |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102192214A (en) * | 2011-04-02 | 2011-09-21 | 肇庆市志成气动有限公司 | High-reliability oscillating cylinder |
| CN102192214B (en) * | 2011-04-02 | 2015-04-01 | 肇庆市志成气动有限公司 | High-reliability oscillating cylinder |
| 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 |
| CN102900727A (en) * | 2012-11-14 | 2013-01-30 | 徐州中矿大贝克福尔科技有限公司 | Device and method for buffering main oil cylinder of paste filling pump in coal mine |
| CN110159615A (en) * | 2019-04-26 | 2019-08-23 | 平高集团有限公司 | The working cylinder of cushion collar and the hydraulic device using the cushion collar |
| CN110159610A (en) * | 2019-04-26 | 2019-08-23 | 平高集团有限公司 | The plug and hydraulic device working cylinder of hydraulic device working cylinder |
| CN110242640A (en) * | 2019-04-26 | 2019-09-17 | 平高集团有限公司 | The working cylinder and hydraulic actuating mechanism of cushion collar, hydraulic device |
| CN110159610B (en) * | 2019-04-26 | 2020-11-06 | 平高集团有限公司 | Plug of hydraulic device working cylinder and hydraulic device working cylinder |
| CN114962388A (en) * | 2022-07-29 | 2022-08-30 | 江苏恒立液压股份有限公司 | Buffer piston and oil cylinder with same |
| CN114962388B (en) * | 2022-07-29 | 2022-12-23 | 江苏恒立液压股份有限公司 | Buffer piston and oil cylinder with same |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110202 |