CN102042280A - Piston cylinder - Google Patents
Piston cylinder Download PDFInfo
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- CN102042280A CN102042280A CN 201010616562 CN201010616562A CN102042280A CN 102042280 A CN102042280 A CN 102042280A CN 201010616562 CN201010616562 CN 201010616562 CN 201010616562 A CN201010616562 A CN 201010616562A CN 102042280 A CN102042280 A CN 102042280A
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- piston
- hole
- cylinder
- cylinder barrel
- throttle orifice
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
- F15B15/222—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke having a piston with a piston extension or piston recess which throttles the main fluid outlet as the piston approaches its end position
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
- F15B15/224—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke having a piston which closes off fluid outlets in the cylinder bore by its own movement
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
The invention provides a piston cylinder which comprises a cylinder barrel (2), an end piece, a piston (1), a piston rod (3), an overflowing hole (4) and a throttling hole (5), wherein the end piece is arranged on the end part of the cylinder barrel (2); the piston (1) is arranged in the cylinder barrel (2); one end of the piston rod (3) is connected to the piston (1), and the other end extends out of the cylinder barrel (2); both the overflowing hole (4) and the throttling hole (5) are through holes arranged in the side wall of the cylinder barrel (2); and the throttling hole (5) is positioned between the overflowing hole (4) and the end piece. No matter how much the flow rate of the piston cylinder is, under the matching of the overflowing hole and the throttling hole, the piston cylinder can perform obvious buffer function and have favorable buffer effect.
Description
Technical field
The present invention relates to a kind of piston cylinder.
Background technique
In the prior art, in order to prevent that piston at stroke end and cylinder head or cylinder bottom generation mechanical collision, often need be provided with damping device on piston cylinder.
Fig. 1 is the partial structurtes schematic representation with piston cylinder of traditional damping device.As shown in Figure 1, one side of piston 1 has piston rod 3, and opposite side has boss 31, and the end of cylinder barrel 2 has and boss 31 corresponding concave part 21, when piston 1 during near the end of cylinder barrel 2, boss 31 is inserted in the recess 21, produces less clearance δ between boss 31 and recess 21, and the fluid in the cavity volume s between piston 1 and the end only can flow out by this less clearance δ, therefore resistance is bigger, produce the buffering back pressure, this buffering back pressure acts on piston 1, plays the effect of buffering.
But, because can there be error in piston 1, cylinder barrel 2, boss 31 and recess 21 inevitably in processing and assembly process, for example can there be the same circularity of boss 31 and recess 21 and processing and the assembly errors such as coaxality between the two, if the gap delta between described boss 31 and the described recess 21 is too small, then in the working procedure of piston cylinder, friction even collision may take place between described boss 31 and the described recess 21, influence the proper functioning of piston cylinder even damage piston cylinder.Therefore, in the existing piston cylinder, the gap delta between boss 31 and the recess 21 generally can be too not little, only is applicable to the occasion that the piston cylinder flow is bigger.When flow hour, the cushioning effect of this damping device is also not obvious.
For addressing the above problem, the invention provides a kind of piston cylinder, regardless of the piston cylinder flow, this piston cylinder all has good cushioning effect.
Summary of the invention
The purpose of this invention is to provide a kind of piston cylinder, regardless of the piston cylinder flow, this piston cylinder all has good cushioning effect.
For achieving the above object, the invention provides a kind of piston cylinder, this piston cylinder comprises cylinder barrel, be arranged on the extremity piece of described cylinder barrel end, be arranged on the piston in the described cylinder barrel, an end is connected to the piston rod that described piston and the other end stretch out from described cylinder barrel, and described piston cylinder also comprises flowing hole and throttle orifice, described flowing hole and described throttle orifice are the through hole on the sidewall that is arranged on described cylinder barrel, and described throttle orifice is between described flowing hole and described extremity piece.
Preferably, described piston cylinder also comprises the cushion seal part, and described cushion seal part is arranged on the described piston, and in the process of described extremity piece motion, described cushion seal part covers or crosses described flowing hole at described piston.
Preferably, the number of described throttle orifice is a plurality of, and these a plurality of described throttle orifices are arranged along the length direction of described cylinder barrel.
Preferably, in the process of described extremity piece motion, described cushion seal part further covers or crosses at least one described throttle orifice at described piston.
Preferably, described flowing hole is that a plurality of circular holes and diameter are 3mm～6mm, and described throttle orifice is that circular hole and diameter are not more than 3mm.
Preferably, described throttle orifice is a shoulder hole, and this shoulder hole comprises path hole and the hole, big footpath that is interconnected, and described path hole is positioned at inwall one side of described cylinder barrel, and hole, described big footpath is positioned at outer wall one side of described cylinder barrel.
Preferably, described flowing hole is that a plurality of circular holes and diameter are 3mm～6mm, and the diameter that described path hole and hole, described big footpath are circular hole and each described path hole is not more than 3mm.
Preferably, described piston cylinder also comprises the cushion seal part, has first circular groove on the circumferencial direction of the circumferential outer surface of described piston, and described cushion seal part is arranged in described first circular groove and is close to described cylinder barrel.
Preferably, described cushion seal part is a Parker OK RunddichtringO.
Preferably, described piston cylinder also comprises second Sealing, has second circular groove on the circumferencial direction of the circumferential outer surface of described piston, and described second Sealing is arranged in described second circular groove and is close to described cylinder barrel.
Preferably, the outer wall of described cylinder barrel is provided with groove and the side cover that covers on this groove, and described flowing hole and throttle orifice are communicated with this groove, and described side cover is provided with opening.
Preferably, described extremity piece comprises guide sleeve, and described piston rod passes described guide sleeve.
Preferably, be provided with first Sealing between described guide sleeve and the described cylinder body and/or between described guide sleeve and the described piston rod.
Preferably, described extremity piece has recess on the excircle of described piston end face, and at least one described throttle orifice is positioned at this indent.
Pass through technique scheme, the sidewall of described cylinder barrel is provided with flowing hole and throttle orifice, when piston when extremity piece moves, the fluid (as air, hydraulic pressure wet goods) in the cavity volume between piston and the extremity piece can be discharged by flowing hole and throttle orifice, the movement velocity of piston is unaffected.Along with piston continues motion and during near its stroke terminal, piston will at first cover flowing hole, fluid in the cavity volume can only be discharged by throttle orifice (area of passage of throttle orifice is less than the area of passage of flowing hole naturally), thereby make the fluid in the cavity volume become the big compensator or trimmer pressure that produces owing to discharging resistance, this compensator or trimmer pressure reacts on piston, play the effect of buffering, thereby can prevent or alleviate the collision of piston and extremity piece.Because can be according to position, shape, number and the size etc. of the flow set flowing hole and the throttle orifice of piston cylinder, therefore, regardless of the piston cylinder flow, by flowing hole and throttle orifice cooperation each other, piston cylinder provided by the present invention all has tangible buffer function, realizes good cushioning effect.
Other technical characteristics of the present invention and beneficial effect will partly be described in detail in embodiment subsequently.
Description of drawings
Accompanying drawing is to be used to provide further understanding of the present invention, and constitutes the part of specification, is used from explanation the present invention with following embodiment one, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the partial structurtes schematic representation with piston cylinder of traditional damping device;
Fig. 2 is the partial structurtes schematic representation of piston cylinder provided by the present invention;
Fig. 3 is the flowing hole of piston cylinder provided by the present invention and the plan view of throttle orifice part.
Description of reference numerals
1 piston, 2 cylinder barrels
3 piston rods, 4 flowing holes
5 throttle orifices, 6 guide sleeves
7 grooves, 8 side covers
11 first circular grooves, 12 second circular grooves
21 recesses, 31 boss
Hole, 52 big footpath, 51 path holes
61 recesses, 81 openings
The a first Sealing b cushion seal part
The c second Sealing s cavity volume
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated.Should be understood that embodiment described herein only is used for description and interpretation the present invention, is not construed as limiting the invention.
The principle of piston cylinder provided by the invention goes for oil hydraulic cylinder, also goes for cylinder, but generally may be more suitable for oil hydraulic cylinder.In addition, for piston cylinder, it comprises polytype, for example single-acting single piston rod cylinder, single-acting double piston-rod cylinder, double-action single piston rod cylinder, double-action double piston-rod cylinder, double-action double piston cylinder or the like, the principle of piston cylinder provided by the invention goes for the piston cylinder of all adequate types equally.Therefore, no matter be oil hydraulic cylinder or cylinder, perhaps the piston cylinder of which kind of type as long as it has used principle of the present invention, all should fall within protection scope of the present invention in principle.
General piston cylinder mainly comprises cylinder barrel, cylinder cap (usually, the cylinder cap that has piston rod to pass through is an end cap, and the cylinder cap that piston-rodless passes through is cylinder head or cylinder bottom), piston and piston rod.The cylinder cap at cylinder barrel and two ends thereof can by weld, be threaded, suitable modes such as flange connects, pull bar connects, the connection of card key are fixed together, and constitute the pressure chamber of sealing.Piston is arranged in the cylinder barrel, and cylinder barrel reciprocatingly slides in the effect lower edge of hydraulic coupling or atmospheric pressure.One end of piston rod is fixedlyed connected with piston, and the other end stretches out outside the cylinder barrel, is used to drive the equipment action.
In piston cylinder, damping device can also be set (as required, damping device can be arranged on an end of cylinder barrel, also can be arranged on the two ends of cylinder barrel simultaneously), when stroke terminal is arrived in piston motion, be used to prevent or alleviate of the impact of moving elements such as piston cylinder cap fixed components such as (cylinder head or cylinder bottoms), its working principle is normally in the certain distance before the piston arrives stroke terminal, fluid (hydraulic oil or gas) in the fluid discharge chamber (promptly hereinafter alleged cavity volume s) can only be discharged by throttling osculum or slit, thereby make this fluid produce suitable compensator or trimmer pressure acting in opposition on piston, resist mutually with the inertial force of piston, reaching the purpose of piston retarding braking, but the effect of existing most of damping devices is unsatisfactory.
With reference to shown in Figure 2, according to one embodiment of the present invention, a kind of piston cylinder is provided, this piston cylinder comprises cylinder barrel 2, be arranged on the extremity piece of cylinder barrel 2 ends, be arranged on the piston 1 in the cylinder barrel 2, one end connects the piston rod 3 that described piston and the other end stretch out from described cylinder barrel 2, and be arranged on flowing hole 4 on the sidewall of described cylinder barrel 2, wherein, described piston cylinder also comprises throttle orifice 5, and this throttle orifice 5 is the through hole on the sidewall that is arranged on described cylinder barrel 2, and described throttle orifice 5 is between described flowing hole 4 and described extremity piece.In the present invention, described extremity piece is meant the parts that are connected to cylinder barrel 2 ends, as end cap (can be cylinder cap or cylinder bottom) and/or guide sleeve etc., is used for the stroke range of limited piston 1.
As mentioned above, as required, damping device can be arranged on an end of cylinder barrel 2, also can be arranged on the two ends of cylinder barrel simultaneously.Therefore, in the present invention, do not doing under the situation of opposite explanation, the extremity piece of described cylinder barrel 2 can be meant the parts that are arranged on cylinder barrel 2 one ends, promptly flowing hole 4 is set and between the extremity piece of cylinder barrel 2 one ends and flowing hole 4, throttle orifice 5 is set, for an end of cylinder barrel 2 provides damping device at an end of cylinder barrel 2; In addition, the extremity piece of described cylinder barrel 2 also can comprise the parts that are arranged on cylinder barrel 2 two ends, promptly flowing hole 4 is set and between the extremity piece of cylinder barrel 2 one ends and flowing hole 4, throttle orifice 5 is set at an end of cylinder barrel 2, simultaneously, flowing hole 4 is set equally and between the extremity piece of cylinder barrel 2 the other ends and flowing hole 4 throttle orifice 5 is set at the other end of cylinder barrel 2, the two ends for cylinder barrel 2 provide damping device simultaneously.
Pass through technique scheme, the sidewall of cylinder barrel 2 is provided with flowing hole 4 and throttle orifice 5, when piston 1 when extremity piece moves, fluid among the cavity volume s that limits between piston 1 and the extremity piece (as air, hydraulic pressure wet goods) can be discharged simultaneously by flowing hole 4 and throttle orifice 5, the movement velocity of piston 1 is unaffected, thereby has guaranteed the working efficiency of piston cylinder.When piston 1 moves to when covering flowing hole 4, fluid among the cavity volume s can't be discharged by flowing hole 4 again, and can only discharge by throttle orifice 5, increased the discharge resistance of fluid, thereby make the fluid in the cavity volume s produce compensator or trimmer pressure, this compensator or trimmer pressure reacts on piston 1, resists mutually with the inertial force of piston 1, to play the effect of buffering, prevent or alleviate the collision of piston 1 and extremity piece.Because can be according to position, shape, number and the size etc. of the flow set flowing hole 4 and the throttle orifice 5 of piston cylinder, therefore, regardless of the piston cylinder flow, by flowing hole 4 and throttle orifice 5 cooperation each other, piston cylinder provided by the present invention all has tangible buffer function, can realize good cushioning effect.
5 throttling actions of described throttle orifice, its number and concrete spread pattern can design according to concrete needs.Preferably, as shown in Figures 2 and 3, the number of described throttle orifice 5 is a plurality of, and a plurality of described throttle orifice 5 is arranged along the length direction (being the substantially horizontal among Fig. 2) of described cylinder barrel 2.When described piston 1 in the process of extremity piece motion, piston 1 at first covers flowing hole 4, the fluid among the cavity volume s can't be discharged by flowing hole 4, and can only discharge by throttle orifice 5.Along with piston 1 continues motion, piston 1 will cover a plurality of throttle orifices 5 of arranging along the length direction of described cylinder barrel 2 gradually, thereby the discharge resistance of the fluid among the cavity volume s increases step by step, and the compensator or trimmer pressure of piston 1 also increases step by step, makes that the cushioning effect of this piston 1 is desirable more.Schematically show three throttle orifices 5 in Fig. 2, but according to concrete needs, the number of this throttle orifice 5 can be two, also can be more a plurality of, the present invention does not limit this.
In addition, described throttle orifice 5 can have various suitable forms, as circular hole, elliptical aperture, bar seam hole etc.Preferably, described throttle orifice 5 is a shoulder hole, and this shoulder hole comprises path hole 51 and the hole 52, big footpath that is interconnected, and described path hole 51 is positioned at inwall one side of described cylinder barrel 2, and 52 in hole, big footpath is positioned at outer wall one side of described cylinder barrel 2.Shoulder hole is easy to processing, can reduce the difficulty of processing of throttle orifice 5.Simultaneously, described throttle orifice 5 is designed to stepped shaft can also prevents to a certain extent that it from blocking in the course of the work, guarantee its pooling feature, make the piston cylinder can proper functioning.Need to prove at this, path hole 51 described here is two relative notions with hole 52, big footpath, be the size (or diameter) of the size (or diameter) in path hole 51 less than hole 52, big footpath, what play throttling action mainly is path hole 51, the effect in hole 52, big footpath mainly be for easy to process, prevent to block etc.
Described path hole 51 and hole, described big footpath 52 can form different shape, and as circle, ellipse etc., preferably, as shown in Figure 3, described path hole 51 and hole, described big footpath 52 are circular hole.Circular hole is easy to processing, and has the good operation characteristic, can satisfy the requirement of described piston cylinder economically.
In order to make described throttle orifice 5 have good restriction effect, should be within certain scope with its size Control.Preferably, the diameter in described path hole 51 is not more than 3mm.Certainly, the size in described path hole 51 is not limited to above-mentioned number range, and its concrete size should be determined according to the flow of piston cylinder.For example, when the flow of piston cylinder is big, should suitably increase the size in described path hole 51,, guarantee the working efficiency of described piston cylinder so that when making described throttle orifice 5 have good restriction effect.
As mentioned above, when described piston 1 moved near its stroke terminal, described piston 1 can cover described flowing hole 4, make among the cavity volume s fluid (as air, hydraulic pressure wet goods) can only by as described in throttle orifice 5 discharge, thereby produce compensator or trimmer pressure and act on piston 1, play the effect of buffering.But,, after described piston cylinder assembling, may produce micro-gap between the inwall of the outer wall of described piston 1 and described cylinder barrel 2 because there are error in the size and the profile of piston 1 described in the manufacture process and cylinder barrel 2.Like this, the high-pressure liquid among the cavity volume s will leak into described flowing hole 4 by the micro-gap between described piston 1 and the described cylinder barrel 2 and flow out, thereby causes the cushioning effect of described piston cylinder to weaken.
Therefore, a preferred embodiment of the invention can remain on the optimum state with the cushioning effect of piston cylinder.Particularly, as shown in Figure 2, described piston cylinder can also comprise cushion seal part b, this cushion seal part b is arranged on the described piston 1, at described piston 1 in the process of described extremity piece motion, described cushion seal part b can cover described flowing hole 4, and perhaps along with the further motion of piston 1, described cushion seal part b can also cross described flowing hole 4.No matter be that cushion seal part b can cover described flowing hole 4 just, still can further cross described flowing hole 4, all making micro-gap between the internal surface of outer surface that high-pressure liquid among the cavity volume s can't be by piston 1 and cylinder barrel 2 leak into described flowing hole 4 discharges, and can only discharge by throttle orifice 5, therefore fully guaranteed the cushioning effect of piston cylinder.
Cushion seal part b can be fixed on the piston 1 by suitable mode.As a kind of simple implementation, can have first circular groove 11 on the circumferencial direction of the circumferential outer surface of described piston 1, described cushion seal part b is arranged in described first circular groove 11 and is close to described cylinder barrel 2, in this way, cushion seal part b can be fixed firmly on the piston 1 very much.
Described cushion seal part b can be arranged on any suitable position on the described piston 1, as long as it can cover or cross described flowing hole 4 in the process of moving towards described extremity piece.Usually, consider that the distance between flowing hole 4 and the throttle orifice 5 is not too large, thus cushion seal part b operated by rotary motion on piston 1 towards an end of described extremity piece, as shown in Figure 2.
In addition, as indicated above, under the situation that a plurality of throttle orifices 5 are set, the effect that increases step by step for the compensator or trimmer pressure that conscientiously guarantees cavity volume s inner fluid, preferably, at described piston 1 in the process of described extremity piece motion, described cushion seal part b can further cover or cross at least one described throttle orifice 5, thereby can avoid the high-pressure liquid among the cavity volume s to leak into this at least one throttle orifice discharge, guarantee that the cushioning effect of piston cylinder adheres to specification by the micro-gap between outer surface of piston and the cylinder barrel internal surface.For example, for the situation shown in Fig. 2 with three throttle orifices 5, when piston 1 when it forms terminal motion, cushion seal part b will at first cover and cross described flowing hole 4, can further cover first throttle orifice 5 near described flowing hole 4 then, fluid can only be discharged by second and the 3rd throttle orifice 5 of back among the cavity volume s at this moment.Then, along with the further motion of piston 1, piston 1 can also cover second throttle orifice 5, makes that the fluid among the cavity volume s can only be discharged by last throttle orifice 5 near extremity piece, discharges resistance and compensator or trimmer pressure and reaches maximization.At last, when piston 1 moves to its formation terminal, it can finally cover last throttle orifice 5, but preferably, can keep this last throttle orifice 5 not cresteds, thereby the fluid in the assurance cavity volume s can be discharged smoothly, avoids occurring the situation generation that piston 1 can't move to the stroke terminal of its design.In other words, keep last throttle orifice 5 not crested, can press close to extremity piece so that piston 1 can successfully arrive its formation terminal or recline, can not lose the stroke range of piston cylinder.
Described cushion seal part b can be for Sealing commonly used in related domain, as long as can play seal action.In actual applications,, improve the functional reliability of piston cylinder, should select sealing and wear resistance shock absorber preferably for use in order to prolong the working life of described cushion seal part b.The present inventor finds that through repeatedly test Parker (Parker) OK RunddichtringO has good sealing property and wear resistance, can satisfy the requirement of piston cylinder for functional reliability.Therefore, preferably, described cushion seal part b is a Parker OK RunddichtringO.
In addition, be provided with under the situation of cushion seal part b on the piston 1, if flowing hole 4 sizes are too big, then cushion seal part b with piston 1 movement process in, it is easy to be damaged by flowing hole 4.Otherwise the size of institute's flowing hole 4 is too little, then can reduce the velocity of discharge of cavity volume s inner fluid inevitably again, thereby influences the working efficiency of piston cylinder.Therefore, preferably, as shown in Figures 2 and 3, described flowing hole 4 can be set to a plurality of circular holes (for example two in the diagram), and the diameter of this circular hole is preferably 3mm～6mm.Circular hole is easy to processing, and has the good operation characteristic, can satisfy the requirement of described piston cylinder.The diameter of circular hole is 3mm～6mm, is not damaged in the time of can guaranteeing described cushion seal part b by described circular hole.By a plurality of flowing holes (circular hole) are set, the assurance fluid can be discharged unobstructedly, can not influence the working efficiency of piston cylinder.In addition, what need further specify is, in the present invention, according to concrete design needs, the number of flowing hole 4 can be more than two, and these flowing holes 4 can be to arrange along the length direction of cylinder barrel 2, also can be the circumferential directions along cylinder barrel 2, perhaps the two has both, and the present invention does not limit this.
In order further to improve the sealing effect of described piston cylinder, guarantee the performance characteristic of piston cylinder, preferably, as shown in Figure 2, described piston cylinder can also comprise the second Sealing c, have second circular groove 12 on the circumferencial direction of the circumferential outer surface of described piston 1, the described second Sealing c is arranged in described second circular groove 12 and is close to described cylinder barrel.The Sealing that the described second Sealing c can be well known to those skilled in the art is as O-ring seals, Y shape Sealing and L shaped Sealing etc., as long as can realize its sealing function.The second Sealing c can be arranged on the opposite side of piston 1, and is opposing with described cushion seal part b.Certainly, if buffer structure of the present invention is set simultaneously, above-mentioned cushion seal part b can be set simultaneously in the both sides of piston 1 at the two ends of piston cylinder.In this case, can omit the second Sealing c, perhaps also the second Sealing c can be arranged on other position of piston 1, for example the neutral position of close piston.
As described in Figure 2, preferably, can also be provided with groove 7 and the side cover 8 that covers on this groove 7 on the outer wall of described cylinder barrel 2, described flowing hole 4 and throttle orifice 5 are communicated with this groove 7, and described side cover 8 is provided with opening 81.In the working procedure of piston cylinder, the fluid of discharging from described flowing hole 4 and throttle orifice 5 can flow into gathering-device (as fuel tank) by the public pipeline (not shown) that is connected with described opening 8, this can simplify the line arrangement of piston cylinder, for the installation and the use of piston cylinder facilitates.Described side cover 8 can be arranged on the outer wall of described cylinder barrel 2 in several ways, as welding, bolt connection etc., as long as can realize linkage function.In addition, in order to improve the sealability of described piston cylinder, can between the outer wall of described side cover 8 and described cylinder barrel 2, seal ring be set, the sealing circle can be the frequent seal ring that uses in related domain, also can be to be the custom-designed seal ring of the present invention, its concrete form should be decided according to the actual requirements.
As mentioned before, in the present invention, term " extremity piece " is meant the end that is arranged on cylinder barrel, the parts that are used for the limited piston stroke range, and it can comprise various component in concrete practice, for example cylinder cap (end cap or cylinder bottom), guide sleeve etc.
As shown in Figure 2, as a kind of concrete mode of execution, described extremity piece can comprise guide sleeve 6, and this guide sleeve 6 is arranged on an end of cylinder barrel 2, and an end of piston rod 3 stretches out from guide sleeve 6.In order to improve the sealing effect of piston cylinder, as shown in Figure 2, preferably, be provided with the first Sealing a between described guide sleeve 6 and the described cylinder barrel 2 and/or between described guide sleeve 6 and the described piston rod 3.The Sealing that the described first Sealing a can be well known to those skilled in the art is as O-ring seals, Y shape Sealing and L shaped Sealing etc., as long as can realize its sealing function.
In addition, as shown in Figure 2, on the excircle of the end face of described piston 1, preferably have recess 61, have at least a described throttle orifice 5 to be positioned at this recess 61 places at described guide sleeve 6.By this mode of execution, when piston 1 is positioned at its stroke terminal and abuts in a time-out with described guide sleeve 6, piston 1 and cushion seal part b thereof can't contact or cover this throttle orifice 5, thereby can guarantee in the cavity volume s fluid at last can by this not the throttle orifice 5 of crested discharge smoothly, and can not influence the stroke range of piston cylinder.Can only be provided with described recess 61 in the position at throttle orifice place, certainly, this recess 61 also can promptly form the recess of annular along the circumferencial direction setting of guide sleeve 6.What this need further specify be, be used for limiting under the situation of piston 1 stroke range at guide sleeve 6, described recess 61 can be set on guide sleeve 6, in like manner, in other cases, when using other component to come the stroke range of limited piston 1, described recess 61 can be arranged on other the component equally, promptly is provided with on the extremity piece mentioned above in the present invention.
Known as art technology, guide sleeve 6 can be fixed on the cylinder barrel 2 by multiple suitable mode, for example connect by the card key, perhaps generally can fix by end cap (not shown), end cap then can by be threaded, multiple mode such as welding, pull bar connection is fixed on the cylinder barrel 2, here repeat no more.
Below describe preferred implementation of the present invention in conjunction with the accompanying drawings in detail; but; the present invention is not limited to the detail in the above-mentioned mode of execution; in technical conceive scope of the present invention; can carry out multiple simple variant to technological scheme of the present invention, these simple variant all belong to protection scope of the present invention.It is emphasized that in addition, each concrete technical characteristics described in above-mentioned embodiment under reconcilable situation, can make up by any suitable manner, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.For fear of unnecessary repetition, the present invention no longer illustrates separately to various possible compound modes.
Claims (14)
1. piston cylinder, this piston cylinder comprises cylinder barrel (2), be arranged on the extremity piece of described cylinder barrel (2) end, be arranged on the piston (1) in the described cylinder barrel (2), and one end be connected to the piston rod (3) that described piston (1) and the other end stretch out from described cylinder barrel (2), it is characterized in that, described piston cylinder also comprises flowing hole (4) and throttle orifice (5), described flowing hole (4) and described throttle orifice (5) are the through hole on the sidewall that is arranged on described cylinder barrel (2), and described throttle orifice (5) is positioned between described flowing hole (4) and the described extremity piece.
2. piston cylinder according to claim 1, it is characterized in that, described piston cylinder also comprises cushion seal part (b), described cushion seal part (b) is arranged on the described piston (1), in the process of described extremity piece motion, described cushion seal part (b) covers or crosses described flowing hole (4) at described piston (1).
3. piston cylinder according to claim 2 is characterized in that, the number of described throttle orifice (5) is a plurality of, and these a plurality of described throttle orifices (5) are arranged along the length direction of described cylinder barrel (2).
4. piston cylinder according to claim 3 is characterized in that, in the process of described extremity piece motion, described cushion seal part (b) further covers or crosses at least one described throttle orifice (5) at described piston (1).
5. piston cylinder according to claim 4 is characterized in that, described flowing hole (4) is that a plurality of circular holes and diameter are 3mm～6mm, and described throttle orifice (5) is not more than 3mm for circular hole and diameter.
6. piston cylinder according to claim 4, it is characterized in that, described throttle orifice (5) is a shoulder hole, this shoulder hole comprises path hole (51) and the hole (52), big footpath that is interconnected, described path hole (51) is positioned at inwall one side of described cylinder barrel (2), and hole, described big footpath (52) is positioned at outer wall one side of described cylinder barrel (2).
7. piston cylinder according to claim 6 is characterized in that, described flowing hole (4) is that a plurality of circular holes and diameter are 3mm～6mm, and described path hole (51) and hole, described big footpath (52) are circular hole, and the diameter in each described path hole (51) is not more than 3mm.
8. piston cylinder according to claim 2, it is characterized in that, have first circular groove (11) on the circumferencial direction of the circumferential outer surface of described piston (1), described cushion seal part (b) is arranged in described first circular groove (11) and is close to described cylinder barrel (2).
9. piston cylinder according to claim 8 is characterized in that, described cushion seal part (b) is a Parker OK RunddichtringO.
10. piston cylinder according to claim 2, it is characterized in that, described piston cylinder also comprises second Sealing (c), have second circular groove (12) on the circumferencial direction of the circumferential outer surface of described piston (1), described second Sealing (c) is arranged in described second circular groove (12) and is close to described cylinder barrel (2).
11. piston cylinder according to claim 1, it is characterized in that, the outer wall of described cylinder barrel (2) is provided with groove (7) and covers side cover (8) on this groove (7), and described flowing hole (4) and throttle orifice (5) are communicated with this groove (7), and described side cover (8) is provided with opening (81).
12. piston cylinder according to claim 1 is characterized in that, described extremity piece comprises guide sleeve (6), and described piston rod (3) passes described guide sleeve (6).
13. piston cylinder according to claim 12 is characterized in that, is provided with first Sealing (a) between described guide sleeve (6) and the described cylinder body (2) and/or between described guide sleeve (6) and the described piston rod (3).
14., it is characterized in that described extremity piece has recess (61) according to claim 1 or 13 described piston cylinders on the excircle of described piston end face, at least one described throttle orifice (5) is positioned at this recess (61) and locates.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106165620A CN102042280B (en) | 2010-12-30 | 2010-12-30 | Piston cylinder |
| PCT/CN2011/075609 WO2012088836A1 (en) | 2010-12-30 | 2011-06-10 | Piston cylinder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106165620A CN102042280B (en) | 2010-12-30 | 2010-12-30 | Piston cylinder |
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| Publication Number | Publication Date |
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| CN102042280A true CN102042280A (en) | 2011-05-04 |
| CN102042280B CN102042280B (en) | 2012-11-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010106165620A Active CN102042280B (en) | 2010-12-30 | 2010-12-30 | Piston cylinder |
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| Country | Link |
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| CN (1) | CN102042280B (en) |
| WO (1) | WO2012088836A1 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012088836A1 (en) * | 2010-12-30 | 2012-07-05 | 长沙中联重工科技发展股份有限公司 | Piston cylinder |
| CN102705295A (en) * | 2012-05-30 | 2012-10-03 | 马鞍山市裕华机械制造有限公司 | Guide sleeve of hydraulic oil cylinder |
| CN102777443A (en) * | 2012-08-15 | 2012-11-14 | 三一重工股份有限公司 | Hydraulic cylinder, hydraulic system and engineering machine |
| CN102878149A (en) * | 2012-10-23 | 2013-01-16 | 湖南特力液压有限公司 | Sealing part mounting structure and sealing part mounting method |
| CN102913503A (en) * | 2011-08-04 | 2013-02-06 | Smc株式会社 | Fluid pressure cylinder |
| US20140137731A1 (en) * | 2011-08-03 | 2014-05-22 | Abb Technology Ag | Differential cylinder for a hydromechanical drive for electrical circuit breakers |
| US20140144315A1 (en) * | 2011-08-03 | 2014-05-29 | Abb Technology Ag | Differential cylinder for a hydromechanical drive for electrical circuit breakers |
| CN104358734A (en) * | 2014-10-14 | 2015-02-18 | 上海汇益控制系统股份有限公司 | Single-action hydraulic cylinder for hydraulic system of steam turbine |
| CN106369010A (en) * | 2016-10-27 | 2017-02-01 | 华南理工大学 | Adjustable high-speed cylinder buffer device and method |
| CN109865211A (en) * | 2017-12-01 | 2019-06-11 | 萧毓龙 | Free fall type escape device for high-rise buildings |
| TWI724253B (en) * | 2017-11-15 | 2021-04-11 | 蕭毓龍 | Free-falling escape device |
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| CN102042280B (en) * | 2010-12-30 | 2012-11-14 | 长沙中联消防机械有限公司 | Piston cylinder |
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| CN1253242A (en) * | 1998-11-06 | 2000-05-17 | 速睦喜股份有限公司 | Cylinder having buffer mechanism |
| CN2615406Y (en) * | 2003-04-29 | 2004-05-12 | 天津特精液压股份有限公司 | Piston type single-action damper hydraulic cylinder |
| CN1515368A (en) * | 2003-08-26 | 2004-07-28 | 苏州市越海拉伸机械有限公司 | Lower cylinder of hydraulic duoble-action stretching machine |
| US20060016328A1 (en) * | 2004-07-23 | 2006-01-26 | Belanger Rene F | Impact plate for component assembly |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012088836A1 (en) * | 2010-12-30 | 2012-07-05 | 长沙中联重工科技发展股份有限公司 | Piston cylinder |
| US20140137731A1 (en) * | 2011-08-03 | 2014-05-22 | Abb Technology Ag | Differential cylinder for a hydromechanical drive for electrical circuit breakers |
| US9920777B2 (en) * | 2011-08-03 | 2018-03-20 | Abb Schweiz Ag | Differential cylinder for a hydromechanical drive for electrical circuit breakers |
| US9714645B2 (en) * | 2011-08-03 | 2017-07-25 | Abb Schweiz Ag | Differential cylinder for a hydromechanical drive for electrical circuit breakers |
| US20140144315A1 (en) * | 2011-08-03 | 2014-05-29 | Abb Technology Ag | Differential cylinder for a hydromechanical drive for electrical circuit breakers |
| CN102913503A (en) * | 2011-08-04 | 2013-02-06 | Smc株式会社 | Fluid pressure cylinder |
| CN102913503B (en) * | 2011-08-04 | 2016-08-10 | Smc株式会社 | Fluid pressure cylinder |
| TWI586901B (en) * | 2011-08-04 | 2017-06-11 | Ｓｍｃ股份有限公司 | Fluid pressure cylinder |
| CN102705295A (en) * | 2012-05-30 | 2012-10-03 | 马鞍山市裕华机械制造有限公司 | Guide sleeve of hydraulic oil cylinder |
| CN102777443A (en) * | 2012-08-15 | 2012-11-14 | 三一重工股份有限公司 | Hydraulic cylinder, hydraulic system and engineering machine |
| CN102878149A (en) * | 2012-10-23 | 2013-01-16 | 湖南特力液压有限公司 | Sealing part mounting structure and sealing part mounting method |
| CN102878149B (en) * | 2012-10-23 | 2015-09-23 | 湖南特力液压有限公司 | Sealing mounting structure and Sealing installation method |
| CN104358734A (en) * | 2014-10-14 | 2015-02-18 | 上海汇益控制系统股份有限公司 | Single-action hydraulic cylinder for hydraulic system of steam turbine |
| CN106369010A (en) * | 2016-10-27 | 2017-02-01 | 华南理工大学 | Adjustable high-speed cylinder buffer device and method |
| CN106369010B (en) * | 2016-10-27 | 2018-04-13 | 华南理工大学 | A kind of adjustable Cushion of High-speed Pneumatic Cylinders apparatus and method |
| TWI724253B (en) * | 2017-11-15 | 2021-04-11 | 蕭毓龍 | Free-falling escape device |
| CN109865211A (en) * | 2017-12-01 | 2019-06-11 | 萧毓龙 | Free fall type escape device for high-rise buildings |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012088836A1 (en) | 2012-07-05 |
| CN102042280B (en) | 2012-11-14 |
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Address after: 410200 No. 997, Section 2, Tengfei Road, Wangcheng District, Changsha City, Hunan Province Patentee after: Hunan Zoomlion emergency equipment Co., Ltd Address before: 410013 Zhonglian Science Park, No. 361 South Bank Road, Hunan, Changsha Patentee before: Changsha Zhonglian fire fighting Machinery Co., Ltd |
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