CN202132304U - High-pressure oil cylinder with combined buffering device in rodless cavity - Google Patents
High-pressure oil cylinder with combined buffering device in rodless cavity Download PDFInfo
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- CN202132304U CN202132304U CN 201120272678 CN201120272678U CN202132304U CN 202132304 U CN202132304 U CN 202132304U CN 201120272678 CN201120272678 CN 201120272678 CN 201120272678 U CN201120272678 U CN 201120272678U CN 202132304 U CN202132304 U CN 202132304U
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Abstract
The utility model discloses a high-pressure oil cylinder with a combined buffering device in a rodless cavity, which comprises a cylinder barrel, a piston rod and a piston, wherein the piston is fixed at a first end of the piston rod. The first end of the piston rod penetrates through the piston, and a locking nut fastens the piston at the first end of the piston rod. A blind hole is arranged on the end face of the first end of the piston rod, and a cylinder curve pin is arranged in the blind hole. A buffering hole is arranged at the bottom of the cylinder barrel. The end portion of one end of the cylinder curve pin away from the piston is arranged into a cone-shaped body, and an axial section of the cone-shaped body is a paraboloid. An orifice communicated with the buffering hole is arranged at the bottom of the cylinder barrel, and a one-way throttle valve is arranged in the orifice. An oil opening communicated with the buffering hole is further arranged at the bottom of the cylinder barrel. The high-pressure oil cylinder has the advantages of being capable of achieving gradually throttling, remitting the impact of the piston to the cylinder barrel, lowering the starting pressure during starting of the oil cylinder and the like.
Description
Technical field
The utility model relates to a kind of high-voltage oil cylinder, is provided with the high-voltage oil cylinder of combined type damping device in especially a kind of rodless cavity.
Background technique
Oil cylinder, promptly oil hydraulic cylinder is a straight line moving type executive component commonly used in the hydraulic system.Piston under the driving of fluid pressure in oil cylinder high-speed motion.When the bar head of piston rod arrived the oil cylinder bottom, piston rod will bump with oil hydraulic cylinder, and piston rod produces oil hydraulic cylinder and impacts, and causes very big noise.
In current engineering machinery, in order to enhance productivity and to reduce cost, need hydraulic jack to make loaded work piece, and merely improve the speed of oil cylinder with more and more faster speed, will produce very big inertial force and hydraulic shock load at end of travel.The oil cylinder of GS General Specification, when end of travel speed surpassed 0.3m/s, for the purpose of protection mechanism and safety, inside needed the design damping device.Traditional unsteady buffering is to utilize floating of cushion collar to guarantee the concentricity in annularly flow slit, and the buffering that the concentricity difference of having avoided conventional fixed to cushion part causes is not enough or buffering is pulled, the situation of gummed even damage oil cylinder.This unsteady cushioning principle is to utilize the permanent throttling of end face seal earlier, and the back is through the process of cushion collar flying height oil return.In the whole buffering course, cushioning effect is fine when beginning, and effect was relatively poor when buffering finished soon.So, at a high speed, under the high inertia operating mode, the Engineering high-voltage oil cylinder, particularly excavator use oil cylinder, piston is near bottom the oil cylinder time, the noise of oil cylinder and impulsive load are very big, this use to oil cylinder is very disadvantageous.
The model utility content
The utility model is the deficiency that exists in the above-mentioned prior art for avoiding, and the high-voltage oil cylinder that is provided with the combined type damping device in a kind of rodless cavity is provided, so that the cylinder buffer process steadily and reduce the breakout pressure of oil cylinder.
The utility model adopts following technological scheme for the technical solution problem.
Be provided with the high-voltage oil cylinder of combined type damping device in the rodless cavity; Comprise cylinder barrel, piston rod and piston, said piston is fixed in first end of piston rod, and its structural feature is; First end of said piston rod passes said piston, and piston is anchored on first end of piston rod through locking nut; The end face of first end of said piston rod is provided with blind hole, is provided with cylinder curved surface pin in the said blind hole; Said cylinder curved surface pin is provided with cushion hole in cylinder barrel bottom, so that can insert in the said cushion hole during piston arrives cylinder barrel bottom; The end away from piston one end of said cylinder curved surface pin is a taper, and the axial section of said taper is parabolic; Also be provided with the throttle orifice that communicates with said cushion hole in the cylinder barrel bottom, said orifice-built-in is equipped with one-way throttle valve; Also be provided with the hydraulic fluid port that communicates with said cushion hole in the cylinder barrel bottom.
The structural feature that is provided with the high-voltage oil cylinder of combined type damping device in the utility model rodless cavity also is:
The inner peripheral surface of said blind hole is provided with first circular groove, and the outer circumferential face that inserts the end in the said blind hole on the said cylinder curved surface pin is provided with second circular groove; The opening of the opening of said first circular groove and second circular groove is oppositely arranged the formation toroidal cavity, is provided with Steel Cable Baffle Ring or a plurality of steel ball in the said toroidal cavity, so that said cylinder curved surface pin is fixed within the said blind hole.
The diameter of said throttle orifice is 1mm～5mm.
Cooperating between the outer circumferential face of said cylinder curved surface pin and the inner peripheral surface of cushion hole is Spielpassung, and matching gap is 0.03mm～0.2mm.
Compared with present technology, the utility model beneficial effect is embodied in:
When piston rod movement arrives the cylinder barrel bottom, make up throttling through cushion hole and throttle orifice, wherein throttle orifice is quantitative throttling, cylinder curved surface pin and cushion hole cooperate realizes the variable throttling.Cylinder curved surface pin gets into after the cushion hole, and amount of restriction reduces gradually, and the movement velocity of piston reduces gradually, makes buffering course comparatively steady.When the hydraulic fluid port oil-feed, one-way throttle valve plays one-way valve, and high pressure oil is opened one-way throttle valve, gets into rodless cavity, when leaving the cylinder barrel bottom by the high pressure oil driven plunger, can reduce the breakout pressure of oil cylinder.The high-voltage oil cylinder of the utility model has and can alleviate piston effectively to the impact of cylinder barrel and the advantages such as breakout pressure when reducing oil cylinder and starting.
Description of drawings
Fig. 1 is the structural representation of the high-voltage oil cylinder of the utility model.
Fig. 2 is oil cylinder piston schematic representation in the motion of cylinder bottom direction, buffering course of the utility model.
Fig. 3 for the oil cylinder piston of the utility model to cylinder bottom move in the other direction, schematic representation in the start-up course.
Fig. 4 is the structural representation of cylinder curved surface pin of the high-voltage oil cylinder of the utility model.
Fig. 5 is the A-A sectional view among Fig. 4.
Label in accompanying drawing 1～accompanying drawing 5: 1 cylinder barrel, 11 throttle orifices, 12 hydraulic fluid ports, 13 rod chambers, 14 rodless cavities, 2 piston rods, 21 blind holes, 3 pistons, 4 locking nuts, 5 Steel Cable Baffle Rings, 6 cylinder curved surface pins, 61 tapers, 62 second circular grooves, 7 cushion holes, 8 one-way throttle valves.
Below pass through embodiment, and combine accompanying drawing that the utility model is described further.
Embodiment
Referring to accompanying drawing 1～accompanying drawing 5, be provided with the high-voltage oil cylinder of combined type damping device in the rodless cavity, comprise cylinder barrel 1, piston rod 2 and piston 3, said piston 3 is fixed in first end of piston rod 2.First end of said piston rod 2 passes said piston 3, and piston 3 is anchored on first end of piston rod 2 through locking nut 4; The end face of first end of said piston rod 2 is provided with blind hole 21, is provided with cylinder curved surface pin 6 in the said blind hole 21; Be provided with cushion hole 7 in cylinder barrel bottom so that piston 3 when arriving cylinder barrels 1 bottom said cylinder curved surface pin 6 can insert in the said cushion hole 7; The end away from piston one end of said cylinder curved surface pin 6 is a taper 61, and the axial section of said taper 61 is parabolic; Also be provided with the throttle orifice 11 that communicates with said cushion hole 7 in cylinder barrel 1 bottom, be provided with one-way throttle valve 8 in the said throttle orifice 11; Also be provided with the hydraulic fluid port 12 that communicates with said cushion hole 7 in cylinder barrel 1 bottom.Piston is divided into rod chamber 13 and rodless cavity 14 with inner cavity of cylinder, and rod chamber 13 is positioned at piston rod 2 places one side, and rodless cavity 14 is positioned at a side of piston-rodless.The hydraulic fluid port 12 of cylinder barrel bottom is connected with said rodless cavity 14.Said blind hole, cylinder curved surface pin and cushion hole are all coaxial with piston.The axis of said hydraulic fluid port 12 is that the footpath ` of cylinder barrel is to the hole.Said throttle orifice comprises two-part, and wherein a part is the radial hole of cylinder barrel, and another part is the axial bore that axis and piston axis parallel; Said one-way throttle valve is arranged at axial bore and radial hole cross section.When piston rod movement arrives the cylinder barrel bottom, make up throttling through cushion hole and throttle orifice, wherein throttle orifice is quantitative throttling, cylinder curved surface pin and cushion hole cooperate realizes the variable throttling.Cylinder curved surface pin gets into after the cushion hole, and amount of restriction increases gradually, and the movement velocity of piston reduces gradually, makes buffering course comparatively steady.When hydraulic fluid port 12 oil-feeds, one-way throttle valve plays one-way valve, and high pressure oil is opened one-way throttle valve, gets into rodless cavity 14, when leaving the cylinder barrel bottom by the high pressure oil driven plunger, can reduce the breakout pressure of oil cylinder.
The inner peripheral surface of said blind hole 21 is provided with first circular groove, and the outer circumferential face that inserts the end in the said blind hole 21 on the said cylinder curved surface pin 6 is provided with second circular groove 62; The opening of the opening of said first circular groove and second circular groove 62 is oppositely arranged the formation toroidal cavity, is provided with Steel Cable Baffle Ring 5 or a plurality of steel ball in the said toroidal cavity, so that said cylinder curved surface pin 6 is fixed within the said blind hole 21.The part of said Steel Cable Baffle Ring or steel ball is positioned at first circular groove, and another part is positioned at second circular groove 62, can cylinder curved surface pin be stuck within the blind hole just.Be Spielpassung between said Steel Cable Baffle Ring or steel ball and the toroidal cavity, make cylinder curved surface pin float and be connected within the blind hole that cylinder curved surface pin has certain move place within blind hole.Cylinder curved surface pin has unsteady characteristic, and when cylinder curved surface pin got into cushion hole, cylinder curved surface pin can be adjusted with concentric with cushion hole automatically, eliminates the influence of coaxiality error, is convenient to cylinder curved surface pin and gets into cushion hole.
The diameter of said throttle orifice 11 is 1mm～5mm.The throttle orifice diameter is set to 1mm～5mm, to realize the purpose of throttling.
Cooperating between the outer circumferential face of said cylinder curved surface pin 6 and the inner peripheral surface of cushion hole 7 is Spielpassung, and matching gap is 0.03mm～0.2mm.Through the adjustment of the matching gap between cylinder curved surface pin and the cushion hole, the amount of restriction when controlling throttling, thus the speed that the adjustment oil cylinder slows down is alleviated the collision between piston and the cylinder sleeve better.During practical operation, cylinder curved surface pin has the outside hard softer material behavior of core after through heat treatment, and diameter is 10mm～50mm.
Referring to Fig. 1, piston 3 is divided into two chambeies to oil cylinder: left end is a rod chamber 13, and right-hand member is a rodless cavity 14.Cylinder curved surface pin 6 outer circumferential faces and cushion hole 7 inner peripheral surfaces are that (gap length is 0.03mm～0.2mm) to Spielpassung.When having hydraulic oil in the rod chamber 13, piston rod 2 is to the motion of oil cylinder bottom, when the approximate parabola tapered segment of cylinder curved surface pin 6 right-hand members progresses into cushion hole 7 (as shown in Figure 2); Cushion hole 7 just begins to realize variable throttling, and (diameter is 1mm～5mm) realize permanent throttling, along with the variation of buffering course to one-way throttle valve 8 throttle orifices; The combination orifice size reduces gradually; Piston 3 speed reduce gradually, finish up to whole buffering course, and the compensator or trimmer pressure in the cushion hole inner chamber keeps evenly; Piston 3 is very low near the speed in oil cylinder when bottom, does not have obvious noise and impulsive load.Simultaneously when hydraulic fluid port 12 oil-feeds of rodless cavity 14 (as shown in Figure 3); High pressure oil is enough to open the spool of one-way throttle valve 8; Make hydraulic oil get in the oil hydraulic cylinder, piston 3 begins reverse the startup, and piston 3 can not produce phenomenons such as starting slow or difficulty because of thrust is not enough yet.
Referring to Fig. 4 and Fig. 5; Cylinder curved surface pin 6 is that (diameter is 10mm～50mm) for the part that a kind of outside is hard, core is softer that produces after adopting high-abrasive material through heat treatment; Right section has the approximate parabola cone part of the cushion stroke of accounting for 2/3 length, and cone partly mills three solid surfaces of processing.The left end of cylinder curved surface pin 6 is realized unique unsteady connection through Steel Cable Baffle Ring 5 or steel ball with piston rod 2, and gap 0.3～0.5mm is so that be adjusted into cushion hole 7 when cushioning concentric automatically.During assembling Steel Cable Baffle Ring 5; All clamp-on Steel Cable Baffle Ring 5 in the cylinder curved surface pin 6 Steel Cable Baffle Ring grooves through guide sleeve earlier; After cylinder curved surface pin 6 was seated, the elasticity of Steel Cable Baffle Ring 5 positive good utilisations self sprang in the groove in the unsteady hole of piston rod, realizes unique unsteady connection.Can change fit in the practical implementation and be changed to steel ball to Steel Cable Baffle Ring, make cylinder curved surface pin 6 Placement better reliability.
Claims (4)
1. be provided with the high-voltage oil cylinder of combined type damping device in the rodless cavity; Comprise cylinder barrel (1), piston rod (2) and piston (3); Said piston (3) is fixed in first end of piston rod (2); It is characterized in that first end of said piston rod (2) passes said piston (3), and piston (3) is anchored on first end of piston rod (2) through locking nut (4); The end face of first end of said piston rod (2) is provided with blind hole (21), is provided with cylinder curved surface pin (6) in the said blind hole (21); Be provided with cushion hole (7) in cylinder barrel bottom so that piston (3) when arriving cylinder barrel (1) bottom said cylinder curved surface pin (6) can insert in the said cushion hole (7); The end away from piston one end of said cylinder curved surface pin (6) is taper (61), and the axial section of said taper (61) is parabolic; Also be provided with the throttle orifice (11) that communicates with said cushion hole (7) in cylinder barrel (1) bottom, be provided with one-way throttle valve (8) in the said throttle orifice (11); Also be provided with the hydraulic fluid port (12) that communicates with said cushion hole (7) in cylinder barrel (1) bottom.
2. be provided with the high-voltage oil cylinder of combined type damping device in the rodless cavity according to claim 1; It is characterized in that; The inner peripheral surface of said blind hole (21) is provided with first circular groove, and said cylinder curved surface pin (6) is gone up the outer circumferential face that inserts the end in the said blind hole (21) and is provided with second circular groove (62); The opening of the opening of said first circular groove and second circular groove (62) is oppositely arranged the formation toroidal cavity, is provided with Steel Cable Baffle Ring (5) or a plurality of steel ball in the said toroidal cavity, so that said cylinder curved surface pin (6) is fixed within the said blind hole (21).
3. be provided with the high-voltage oil cylinder of combined type damping device in the rodless cavity according to claim 1 and 2, it is characterized in that, the diameter of said throttle orifice (11) is 1mm～5mm.
4. be provided with the high-voltage oil cylinder of combined type damping device in the rodless cavity according to claim 1 and 2; It is characterized in that; Cooperating between the outer circumferential face of said cylinder curved surface pin (6) and the inner peripheral surface of cushion hole (7) is Spielpassung, and matching gap is 0.03mm～0.2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120272678 CN202132304U (en) | 2011-07-29 | 2011-07-29 | High-pressure oil cylinder with combined buffering device in rodless cavity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120272678 CN202132304U (en) | 2011-07-29 | 2011-07-29 | High-pressure oil cylinder with combined buffering device in rodless cavity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202132304U true CN202132304U (en) | 2012-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120272678 Expired - Fee Related CN202132304U (en) | 2011-07-29 | 2011-07-29 | High-pressure oil cylinder with combined buffering device in rodless cavity |
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| CN (1) | CN202132304U (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102852903A (en) * | 2012-09-11 | 2013-01-02 | 苏州同大机械有限公司 | Buffer cylinder structure for plastic product molding machine |
| CN103244506A (en) * | 2012-02-08 | 2013-08-14 | 中国石油化工股份有限公司 | Ocean structure underwater vertical butt joint buffer and slow descending device |
| CN104528599A (en) * | 2014-11-13 | 2015-04-22 | 安徽乐库智能停车设备有限公司 | Safe and wear-resistant oil supply system of lifting device |
| CN105041772A (en) * | 2015-08-29 | 2015-11-11 | 济南大学 | Hydraulic cylinder with parabola-type starting characteristic |
| CN105041776A (en) * | 2015-08-29 | 2015-11-11 | 济南大学 | Hydraulic cylinder with equal-percent-type starting characteristic |
| CN105121867A (en) * | 2013-02-13 | 2015-12-02 | 梅西埃-道蒂公司 | Modular actuator with snubbing arrangement |
| CN105156399A (en) * | 2015-08-24 | 2015-12-16 | 济南大学 | Self-adaptation sealing, anti-loosening and auxiliary motion device of hydraulic cylinder piston |
| CN106151160A (en) * | 2015-04-28 | 2016-11-23 | 徐工集团工程机械股份有限公司 | There is hydraulic jack and the excavator of pooling feature |
| CN106907369A (en) * | 2017-04-19 | 2017-06-30 | 雷沃重工股份有限公司 | Agricultural machinery lift cylinder |
| CN108317127A (en) * | 2018-04-11 | 2018-07-24 | 合肥长源液压股份有限公司 | Novel energy-storage hydraulic cylinder |
| CN109538574A (en) * | 2018-12-28 | 2019-03-29 | 泸州市龙马潭区长江液压件有限公司 | Open body hopper hydraulic cylinder |
| CN110617250A (en) * | 2018-11-20 | 2019-12-27 | 湖南机电职业技术学院 | Buffer hydraulic oil cylinder |
| CN112145499A (en) * | 2020-10-10 | 2020-12-29 | 龙工(上海)液压有限公司 | Hydraulic cylinder guide sleeve locking mechanism |
| CN113175459A (en) * | 2021-03-18 | 2021-07-27 | 宣化钢铁集团有限责任公司 | Hydraulic cylinder variable throttling rear buffering device |
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2011
- 2011-07-29 CN CN 201120272678 patent/CN202132304U/en not_active Expired - Fee Related
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244506A (en) * | 2012-02-08 | 2013-08-14 | 中国石油化工股份有限公司 | Ocean structure underwater vertical butt joint buffer and slow descending device |
| CN102852903A (en) * | 2012-09-11 | 2013-01-02 | 苏州同大机械有限公司 | Buffer cylinder structure for plastic product molding machine |
| CN105121867A (en) * | 2013-02-13 | 2015-12-02 | 梅西埃-道蒂公司 | Modular actuator with snubbing arrangement |
| CN105121867B (en) * | 2013-02-13 | 2018-02-27 | 赛峰起落架系统加拿大公司 | Modular event driven device with buffer unit |
| CN104528599A (en) * | 2014-11-13 | 2015-04-22 | 安徽乐库智能停车设备有限公司 | Safe and wear-resistant oil supply system of lifting device |
| CN106151160B (en) * | 2015-04-28 | 2018-05-01 | 徐工集团工程机械股份有限公司 | Hydraulic cylinder and excavator with pooling feature |
| CN106151160A (en) * | 2015-04-28 | 2016-11-23 | 徐工集团工程机械股份有限公司 | There is hydraulic jack and the excavator of pooling feature |
| CN105156399A (en) * | 2015-08-24 | 2015-12-16 | 济南大学 | Self-adaptation sealing, anti-loosening and auxiliary motion device of hydraulic cylinder piston |
| CN105041772A (en) * | 2015-08-29 | 2015-11-11 | 济南大学 | Hydraulic cylinder with parabola-type starting characteristic |
| CN105041776A (en) * | 2015-08-29 | 2015-11-11 | 济南大学 | Hydraulic cylinder with equal-percent-type starting characteristic |
| CN106907369A (en) * | 2017-04-19 | 2017-06-30 | 雷沃重工股份有限公司 | Agricultural machinery lift cylinder |
| CN106907369B (en) * | 2017-04-19 | 2019-03-08 | 雷沃重工股份有限公司 | Agricultural machinery lift cylinder |
| CN108317127A (en) * | 2018-04-11 | 2018-07-24 | 合肥长源液压股份有限公司 | Novel energy-storage hydraulic cylinder |
| CN110617250A (en) * | 2018-11-20 | 2019-12-27 | 湖南机电职业技术学院 | Buffer hydraulic oil cylinder |
| CN109538574A (en) * | 2018-12-28 | 2019-03-29 | 泸州市龙马潭区长江液压件有限公司 | Open body hopper hydraulic cylinder |
| CN112145499A (en) * | 2020-10-10 | 2020-12-29 | 龙工(上海)液压有限公司 | Hydraulic cylinder guide sleeve locking mechanism |
| CN113175459A (en) * | 2021-03-18 | 2021-07-27 | 宣化钢铁集团有限责任公司 | Hydraulic cylinder variable throttling rear buffering device |
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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 |
Granted publication date: 20120201 Termination date: 20170729 |
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| CF01 | Termination of patent right due to non-payment of annual fee |