CN101705954A - Floating joint buffering hydraulic cylinder - Google Patents
Floating joint buffering hydraulic cylinder Download PDFInfo
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- CN101705954A CN101705954A CN200910272898A CN200910272898A CN101705954A CN 101705954 A CN101705954 A CN 101705954A CN 200910272898 A CN200910272898 A CN 200910272898A CN 200910272898 A CN200910272898 A CN 200910272898A CN 101705954 A CN101705954 A CN 101705954A
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Abstract
The invention discloses a floating joint buffering hydraulic cylinder, belonging to the technical field of hydraulic oil cylinders. The floating joint buffering hydraulic cylinder is provided with a guide device on a cylinder cover in a floating way and adopts the guide device to replace a fixed type buffering structure in the prior art; particularly, in a joint guide ring structure, a joint ball is movably arranged in a ball seat and can radially rotate at an angle of 360 degrees in the ball seat, axially swing within a certain angle range (about 5-10 degrees) and also float with the joint ball. The invention reduces the coaxial requirements of parts, is convenient to assembly and easier to realize the buffering and solves the problem of slow start, thereby having the advantages of low requirement on part machining difficulty and precision, good center-aligning ability, quick start and convenient assembly of buffering plungers, short machining period, high production efficiency, long service life, and the like.
Description
Technical field
The invention belongs to technical field of hydraulic oil cylinder, relate to a kind of constant throttle-type buffering hydraulic cylinder in the middle and high compressing cylinder, particularly a kind of floating joint buffering hydraulic cylinder.
Background technique
As shown in fig. 1, for having the oil hydraulic cylinder buffer structure generalized section of constant throttle-type buffer technology now.The oil hydraulic cylinder buffer structure of prior art mainly comprises: piston rod (1); Cylinder barrel (2); Cock screw (3); Seal ring (4); Guide ring (5); Piston (6); O type circle (7); O type circle back-up ring (8); Cylinder cap (9).
The oil hydraulic cylinder of above-mentioned prior art, when when its rod chamber feeds pressure oil, under the effect of pressure oil, promoting piston (6) moves to rodless cavity, and can insert the cylindricality oil drainage hole of cylinder cap (9) at end of travel at the buffer plunger of piston (6) drive lower piston rod (1) afterbody, thereby sealed main drainback passage, the fluid of rodless cavity can only be discharged by the annular space between buffer plunger and the cylindricality oil drainage hole.At this moment the fluid at rodless cavity is subjected to the extruding of piston can produce interior pressure, and the pressure of itself and piston (6) opposite side offsets, and has just reached the cushioning effect that makes piston (6) retarding braking.
From the said structure principle as can be known: the constant throttle-type buffering hydraulic cylinder of prior art, have relatively high expectations with the coaxality of cylinder cap cylindricality oil drainage hole, will produce " suppressing strength " otherwise enter when cushioning, cause oil hydraulic cylinder to start and slowly maybe can't start.When concentricity problem is serious, buffer plunger even can't enter oil drainage hole, causing hydraulic cylinder travel not reach requirement does not have cushioning effect yet.Therefore the constant throttle-type buffering hydraulic cylinder of prior art, the machining accuracy of component and difficulty require very high, and nonetheless, oil hydraulic cylinder also needs could satisfy and cushion requirement by testing, tear open cylinder, repair buffer plunger repeatedly in assembly process.And when starting, the oil hydraulic cylinder of above-mentioned prior art only has the piston rod end face stressed, so lifting surface area is little, and the thrust deficiency easily causes and problem such as starts slowly, breakout pressure is big.
Summary of the invention
Technical problem to be solved by this invention provides a kind of floating joint buffering hydraulic cylinder, can reduce the coaxial requirement of component, is convenient to assembling, is easier to realize buffering and can solves start problem slowly.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of floating joint buffering hydraulic cylinder comprises cylinder barrel, cylinder cap is fixedlyed connected with cylinder barrel, piston rod is installed in the cylinder barrel, piston is installed on the piston rod, floating on the cylinder cap is equipped with guide device.
Described guide device floats by back-up ring and is installed on the cylinder cap.
Described back-up ring is provided with opening.
Described guide device comprises joint lead ring and lead ring.
Described joint lead ring is made up of ball seat and the joint ball that is movably arranged in it.
It between described guide device and the cylinder cap Spielpassung.
Has the gap between described back-up ring, guide device and the cylinder cap.
A kind of floating joint buffering hydraulic cylinder provided by the invention is installed guide device by floating on cylinder cap, adopted guide device to substitute the fixed buffer structure of prior art; The structure of joint lead ring particularly, joint ball is movably arranged in the ball seat, joint ball can radially 360 ° of rotations in ball seat, and (about 5～10 °) swing in axial several angle scope, also can float with ball seat. reduced the coaxial requirement of component, be convenient to assembling, be easier to realize buffering and solved start problem slowly, make the present invention have the component difficulty of processing and required precision low, buffer plunger is good to neutrality, startup is fast, easy to assembly, process-cycle is short, characteristics such as manufacturing efficiency height and long service life.
Description of drawings
Fig. 1 is the constant throttle-type buffering hydraulic cylinder cross-sectional view based on prior art:
Fig. 2 is a cross-sectional view of the present invention:
Fig. 3 is a buffering course schematic representation of the present invention.
Embodiment
In Fig. 1, the oil hydraulic cylinder buffer structure of prior art mainly comprises: piston rod 1; Cylinder barrel 2; Cock screw 3; Seal ring 4; Guide ring 5; Piston 6; O type circle 7; O type circle back-up ring 8; Cylinder cap 9.
The oil hydraulic cylinder of above-mentioned prior art, when when its rod chamber feeds pressure oil, under the effect of pressure oil, promoting piston 6 moves to rodless cavity, and can insert the cylindricality oil drainage hole of cylinder cap 9 at end of travel at the buffer plunger that piston 6 drives lower piston rod 1 afterbody, thereby sealed main drainback passage, the fluid of rodless cavity can only be discharged by the annular space between buffer plunger and the cylindricality oil drainage hole.At this moment the fluid at rodless cavity is subjected to the extruding of piston can produce interior pressure, and the pressure of itself and piston 6 opposite sides offsets, and has just reached the cushioning effect that makes piston 6 retarding brakings.
In Fig. 2, a kind of floating joint buffering hydraulic cylinder comprises cylinder barrel 10, and cylinder cap 17 is fixedlyed connected with cylinder barrel 10, and piston rod 11 is installed in the cylinder barrel 10, and piston 13 is installed on the piston rod 11, and floating on the cylinder cap 17 is equipped with guide device.
Described guide device floats by back-up ring 15 and is installed on the cylinder cap 17.
Described back-up ring 15 is provided with opening.
Described guide device comprises joint lead ring and lead ring.
Described joint lead ring is made up of ball seat 16 and the joint ball 14 that is movably arranged in it.
Be Spielpassung between described guide device and the cylinder cap 17.
Has the gap between described back-up ring 15, guide device and the cylinder cap 17.
Embodiment one:
A kind of floating joint buffering hydraulic cylinder, cylinder barrel 10 is fixedlyed connected with cylinder cap 17 with nut 18 by pull bar 19, piston rod 11 is installed in the cylinder barrel 10, piston 13 and piston rod 11 are by being threaded, also be provided with cushion collar 12 between piston 13 and the piston rod 11, in piston rod 11 and cylinder cap 17 cooperation places, by the back-up ring 15 unsteady ball seats 16 that are equipped with, joint ball 14 is movably arranged in the ball seat 16, be Spielpassung between ball seat 16 and the cylinder cap 17, back-up ring 15, has the gap between ball seat 16 and the cylinder cap 17, be that ball seat 16 within the specific limits can be in the six direction unrestricted motion, joint ball 14 can radially 360 ° of rotations in ball seat 16, and about 5～10 ° of swings in axial several angle scope, also can float with ball seat.On back-up ring 15, be provided with opening.
In Fig. 2, Fig. 3, piston rod 11 is under external force to the motion of cylinder cap 17 directions, when the buffer plunger of piston rod 11 front ends contacts with joint ball 14 endoporus, under the constraint of piston rod 11, joint ball 14 is rotation or oscillation adjustment angle automatically, and is coaxial with the piston rod buffer plunger to guarantee endoporus.Simultaneously because ball seat 16 can drive joint ball 14 at radial floating, and piston rod buffer plunger and joint ball 14 endoporus all have the tapering guiding, thereby enlarged the regulation range of joint ball 14, the coaxial requirement of component is minimized, according to designing requirement, even reach 2.5mm, also can guarantee the smooth and easy buffering course of finishing with axis error.
When entering joint ball 14 endoporus, sealed the piston rod buffer plunger main drainback passage, the fluid of buffer cavity is pressed in being squeezed and producing, ball seat 16 is forced on the cylinder cap 17, fluid can only reflux the annular space between piston rod buffer plunger and joint ball 14 endoporus, therefore, press further in the buffer cavity and strengthen, itself and the suffered external force of piston rod offset, and have just reached the cushioning effect that makes the piston rod retarding braking.
During startup, fluid enters from cylinder cap, and buffer plunger end face pressurized makes piston rod produce thrust, meanwhile ball seat 16 also is forced on the back-up ring 15, and itself and 17 of cylinder caps produce the gap, and fluid enters thus, and the opening by back-up ring 15, act on the piston 13 and produce thrusts.Therefore the end face of the present invention's buffer plunger of piston rod front end when starting and piston 13 are simultaneously stressed, need not to increase breakout pressure or the requirement that one-way valve can reach quick startup is installed in addition.
As mentioned above; basic design of the present invention is as above. but in technical field of the present invention; as long as possess the most basic knowledge; can improve other exercisable embodiments of the present invention. in the present invention substantive technological scheme has been proposed the patent protection request, its protection domain should comprise all variation patterns with above-mentioned technical characterstic.
The above, it only is preferred embodiment of the present invention, be not that type of the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art are not in breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solution of the present invention, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Embodiment two:
A kind of floating joint buffering hydraulic cylinder, cylinder barrel 10 is fixedlyed connected with cylinder cap 17 with nut 18 by pull bar 19, piston rod 11 is installed in the cylinder barrel 10, piston 13 and piston rod 11 also are provided with cushion collar 12 by being threaded between piston 13 and the piston rod 11, in piston rod 11 and cylinder cap 17 cooperation places, by the back-up ring 15 unsteady lead rings that are equipped with, lead ring is not herein drawn in the drawings, can regard ball seat 16 as and be combined as a whole with joint ball 14, is provided with opening on back-up ring 15.The same example is the same, is Spielpassung between lead ring and the cylinder cap 17, has the gap between back-up ring 15, ball seat 16 and the cylinder cap 17, and lead ring within the specific limits can be in the six direction unrestricted motion.
Piston rod 11 moves to cylinder cap 17 directions under external force, when the buffer plunger of piston rod 11 front ends contacts with the lead ring endoporus, and under the constraint of piston rod 11, the lead ring radial floating, coaxial to guarantee endoporus with the piston rod buffer plunger.The coaxial requirement of component is minimized.
When entering the lead ring endoporus, sealed the piston rod buffer plunger main drainback passage, the fluid of buffer cavity is pressed in being squeezed and producing, lead ring is forced on the cylinder cap 17, fluid can only reflux the annular space between piston rod buffer plunger and lead ring endoporus, therefore, press further in the buffer cavity and strengthen, itself and the suffered external force of piston rod offset, and have just reached the cushioning effect that makes the piston rod retarding braking.
During startup, fluid enters from cylinder cap, and buffer plunger end face pressurized makes piston rod produce thrust, meanwhile lead ring also is forced on the back-up ring 15, and itself and 17 of cylinder caps produce the gap, and fluid enters thus, and the opening by back-up ring 15, act on the piston 13 and produce thrusts.
Claims (7)
1. floating joint buffering hydraulic cylinder, comprise cylinder barrel (10), cylinder cap (17) is fixedlyed connected with cylinder barrel (10), and piston rod (11) is installed in the cylinder barrel (10), piston (13) is installed on the piston rod (11), it is characterized in that: cylinder cap (17) is gone up to float guide device is installed.
2. a kind of floating joint buffering hydraulic cylinder according to claim 1 is characterized in that: described guide device floats by back-up ring (15) and is installed on the cylinder cap (17).
3. a kind of floating joint buffering hydraulic cylinder according to claim 2 is characterized in that: described back-up ring (15) is provided with opening.
4. a kind of floating joint buffering hydraulic cylinder according to claim 1 is characterized in that: described guide device comprises joint lead ring and lead ring.
5. a kind of floating joint buffering hydraulic cylinder according to claim 4 is characterized in that: described joint lead ring is made up of ball seat (16) and the joint ball (14) that is movably arranged in it.
6. according to claim 1 or 4 described a kind of floating joint buffering hydraulic cylinders, it is characterized in that: be Spielpassung between described guide device and the cylinder cap (17).
7. according to claim 2 or 3 or 4 described a kind of floating joint buffering hydraulic cylinders, it is characterized in that: have the gap between described back-up ring (15), guide device and the cylinder cap (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910272898A CN101705954A (en) | 2009-11-24 | 2009-11-24 | Floating joint buffering hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910272898A CN101705954A (en) | 2009-11-24 | 2009-11-24 | Floating joint buffering hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101705954A true CN101705954A (en) | 2010-05-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910272898A Pending CN101705954A (en) | 2009-11-24 | 2009-11-24 | Floating joint buffering hydraulic cylinder |
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| CN (1) | CN101705954A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103862514A (en) * | 2012-12-17 | 2014-06-18 | 维嘉数控科技（苏州）有限公司 | Cylinder buffering device |
| CN105041771A (en) * | 2015-08-29 | 2015-11-11 | 济南大学 | Hydraulic cylinder of which starting characteristic is straight |
| CN105041776A (en) * | 2015-08-29 | 2015-11-11 | 济南大学 | Hydraulic cylinder with equal-percent-type starting characteristic |
-
2009
- 2009-11-24 CN CN200910272898A patent/CN101705954A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103862514A (en) * | 2012-12-17 | 2014-06-18 | 维嘉数控科技（苏州）有限公司 | Cylinder buffering device |
| CN103862514B (en) * | 2012-12-17 | 2016-06-29 | 维嘉数控科技（苏州）有限公司 | Cylinder buffering device |
| CN105041771A (en) * | 2015-08-29 | 2015-11-11 | 济南大学 | Hydraulic cylinder of which starting characteristic is straight |
| CN105041776A (en) * | 2015-08-29 | 2015-11-11 | 济南大学 | Hydraulic cylinder with equal-percent-type starting characteristic |
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Effective date of abandoning: 20100512 |
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