CN103438050B - The cylinder apparatus cushioned after a kind of off-load - Google Patents
The cylinder apparatus cushioned after a kind of off-load Download PDFInfo
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- CN103438050B CN103438050B CN201310390525.6A CN201310390525A CN103438050B CN 103438050 B CN103438050 B CN 103438050B CN 201310390525 A CN201310390525 A CN 201310390525A CN 103438050 B CN103438050 B CN 103438050B
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Abstract
The cylinder apparatus cushioned after the present invention relates to a kind of off-load, belongs to technical field of hydraulic.The cylinder apparatus cushioned after a kind of off-load of the present invention, comprising: the one-way valve piston that cylinder bottom, cylinder barrel, cylinder cap, damper piston are identical with two structures.The present invention, by a set of relief circuit of design, and coordinates gap buffer structure comprehensively to use, and the function making cushion cylinder achieve first off-load to cushion again, serves the peak value reducing cushion effect, shorten cushion stroke, cushion effect more stably.
Description
Technical field
The cylinder apparatus cushioned after the present invention relates to a kind of off-load, belongs to technical field of hydraulic.
Background technique
Along with the development of engineering machinery hydraulic technology and market, require that engineering machinery hydraulic cylinder piston movement speed is more and more higher, in order to avoid piston clashes into cylinder cap or cylinder bottom at stroke two ends, produce noise, affect operating accuracy so that damage parts, oil hydraulic cylinder two ends of being everlasting arrange damping device.
The buffer structure of traditional hydraulic jack has two kinds substantially: one is oil hydraulic cylinder external control, and namely in the outer control loop of oil hydraulic cylinder, the flow control device installing throttle valve or other form carries out throttling buffering control; Another kind is oil hydraulic cylinder internal control, namely at oil hydraulic cylinder indoor design damping device, realizes throttling buffering.Two kinds of damping devices all do not have unloading function, are all to carry out throttling control to oil back chamber, and the resistance of oil return is increased, and piston is subject to larger back pressure at oil back chamber, thus slow down the speed of piston movement, reach the object of avoiding clashing into cylinder cap or cylinder bottom.But the cylinder apparatus of conventional construction is when piston movement speed is very fast, because cushion effect peak value is excessive, cushioning effect is bad, and needs larger cushion stroke to realize, and adds the volume of oil cylinder.
Summary of the invention
The object of the invention is cylinder apparatus in order to solve conventional construction when piston movement speed is very fast, there is cushioning effect bad, the shortcoming such as the cushion stroke of needs is large, and the cylinder apparatus cushioned after proposing a kind of off-load.
The present invention seeks to be achieved through the following technical solutions:
The cylinder apparatus cushioned after a kind of off-load of the present invention, comprising: the one-way valve piston that cylinder bottom, cylinder barrel, cylinder cap, damper piston are identical with two structures,
The end of piston head one end of one-way valve piston is processed with spring fitting groove, and the piston head of one-way valve piston and piston rod joint are conical surface transition, and has the oil inlet hole of UNICOM between this transition conical surface and spring fitting groove of piston head;
In the internal diameter of cylinder barrel and damper piston, the external diameter of piston head matches;
The inner side end of cylinder bottom is plane, and the center of cylinder bottom inner side end has shoe cream room; The rear end inwall of cylinder bottom center shoe cream room is processed with pressure oil manhole appendix outside cylinder bottom; On cylinder bottom, the side of shoe cream room is processed with the one-way valve piston mounting hole of radial aperture, this one-way valve piston mounting hole is three stepped cylindrical shape through holes, wherein in one-way valve piston mounting hole, the internal diameter of leading portion internal diameter minimum vias and the maximum through hole of back segment internal diameter is matched with the piston rod of one-way valve piston and the external diameter of piston head respectively, UNICOM between the stage casing through hole of one-way valve piston mounting hole and cylinder bottom center shoe cream room, the front inner wall of the maximum through hole of back segment internal diameter of one-way valve piston mounting hole is processed with circulating oil path through hole outside cylinder bottom;
The inner side end of cylinder cap is plane, and the central shaft of cylinder cap is to having the through hole matched with piston rod internal diameter in damper piston, and the inner side of this through hole is processed with shoe cream room; In cylinder cap central through bore, the rear end inwall of shoe cream room is processed with pressure oil manhole appendix outside cylinder cap; On cylinder cap, the side of central through bore is processed with the one-way valve piston mounting hole of radial aperture, this one-way valve piston mounting hole is three stepped cylindrical shape through holes, wherein in one-way valve piston mounting hole, the internal diameter of leading portion internal diameter minimum vias and the maximum through hole of back segment internal diameter is matched with the piston rod of one-way valve piston and the external diameter of piston head respectively, UNICOM between the stage casing through hole of one-way valve piston mounting hole and the shoe cream room of cylinder cap central through bore, the front inner wall of the maximum through hole of back segment internal diameter of one-way valve piston mounting hole is processed with circulating oil path through hole outside cylinder cap;
Shoe cream room one end of cylinder bottom and cylinder cap is fixed on the two ends of cylinder barrel inwardly simultaneously, and the piston head of damper piston is positioned at the inner chamber of cylinder barrel, and the piston rod of damper piston inserts in the central through bore of cylinder cap; Piston rod one end of two one-way valve pistons is inserted in two one-way valve piston mounting holes from the outside of cylinder bottom and cylinder cap inwardly respectively, the outer end of two one-way valve piston mounting holes is all by blocking encapsulation, and all spring is installed between each blocking and the one-way valve piston of its front end, under spring free state, in one-way valve piston, the transition conical surface of piston head and piston rod joint presses closer the rear end of one-way valve piston mounting hole stage casing through hole; Connected by throttling pipeline between the circulating oil path through hole of cylinder bottom and the circulating oil path through hole of cylinder cap, and throttling pipeline arranges throttle valve; The oil inlet hole of cylinder bottom is connected with pressure oil tank respectively with the pressure oil manhole appendix of cylinder cap.
The piston head of damper piston and piston rod joint are processed with the buffer plunger A that external diameter is greater than the cylindrical structure of piston rod external diameter, the buffer plunger B of cylindrical structure is extended forward at the center, front end of piston head, and the buffer plunger sidewall at piston head two ends is all processed with the oil-feed tank expanded gradually to both sides from piston head; The oral area of the shoe cream room of cylinder bottom is processed with the guide section that internal diameter and piston head bumper post at front end plug B external diameter match; The oral area of the shoe cream room of cylinder cap is processed with the guide section that internal diameter and piston head rear end buffer plunger A external diameter match.
Under spring free state, in two one-way valve pistons, piston rod stretches out the length of respective one-way valve piston mounting hole front end, with the buffer plunger length of its homonymy on the piston head being greater than damper piston respectively.
The pressure oil manhole appendix of cylinder bottom and cylinder cap all has one-way valve mounting hole to its inner side end, is all provided with the built-in one-way valve from the outside one-way flow of pressure oil manhole appendix in the one-way valve mounting hole at cylinder bottom and cylinder cap pressure oil manhole appendix place separately.
Be two throttling pipelines in parallel between the circulating oil path through hole of cylinder bottom and the circulating oil path through hole of cylinder cap, every bar throttling pipeline is provided with one-way valve and throttle valve, and the adjustment direction of one-way valve is contrary on two throttling pipelines, when stressing conditions at damper piston two ends is different, what can regulate damper piston two ends respectively unloads load forces size.
Between the piston head of damper piston and inner wall of cylinder, cylinder barrel two ends and the joint of cylinder bottom and cylinder cap, between the piston rod of damper piston and the central through bore of cylinder cap, be provided with seal ring.
Working procedure:
Be positioned at cylinder cap inner side end side for initial position with the piston head of damper piston, the pressure oil manhole appendix of cylinder cap is the input state of high pressure oil, and the pressure oil manhole appendix of cylinder bottom is oil return state; Now, the one-way valve piston A of cylinder cap side is under the effect of piston head ear end face, Compress Spring, gets out of the way the rear end of this one-way valve piston mounting hole stage casing, side through hole, makes to be in oil circuit UNICOM between the circulating oil path through hole outside the shoe cream room of cylinder cap central through bore and cylinder cap; And the one-way valve piston B of cylinder bottom side presses closer the rear end of this one-way valve piston mounting hole stage casing, side through hole under spring reset effect by the transition conical surface of its piston head and piston rod joint.
After high pressure oil enters the shoe cream room of cylinder cap central through bore from the pressure oil manhole appendix of cylinder cap, the high pressure oil reserved from the circulating oil path through hole outside cylinder cap flows to the circulating oil path through hole of cylinder bottom by the road, oil inlet hole again on the one-way valve piston B transition conical surface of cylinder bottom side flows into the spring position of one-way valve piston B rear end, promote the rear end that one-way valve piston B presses closer one-way valve piston mounting hole stage casing through hole together with spring, thus the piston head two ends oil pocket of damper piston is completely cut off.
The built-in one-way valve A of the pressure oil manhole appendix place installation of cylinder cap, open when this hole oil-feed, damper piston is more easily started, moving right under the promotion of high pressure oil of damper piston, after the piston head ear end face of damper piston departs from the piston rod of one-way valve piston A, under high pressure oil effect, one-way valve piston A still keeps Compress Spring state; Because in one-way valve piston B, piston rod stretches out the length of homonymy one-way valve piston mounting hole front end, be greater than the length of piston head bumper post at front end plug B in damper piston; When damper piston continue move right, first the front-end face of its piston head contacts the piston rod of the one-way valve piston B of cylinder bottom side, and then promote its Compress Spring; Now, the transition conical surface of the one-way valve piston B of cylinder bottom side gets out of the way the rear end of this one-way valve piston mounting hole stage casing, side through hole, makes to be in oil circuit UNICOM between the circulating oil path through hole outside the shoe cream room of cylinder bottom and cylinder bottom; The high pressure oil reserved from the circulating oil path through hole outside cylinder cap flows to the circulating oil path through hole of cylinder bottom through throttling pipeline, then enters shoe cream room and the piston head front end oil pocket of cylinder bottom, forms relief circuit;
When the buffer plunger B that damper piston moves to its front end inserts the guide section of the oral area of cylinder bottom central blind hole, buffer plunger B, under the contraction of sidewall oil-feed tank, carries out throttling buffering to damper piston, damper piston is slowly moved and puts in place; Damper piston is when promoting one-way valve piston B Compress Spring, and the opposition of spring plays buffer function to damper piston equally.
When damper piston is done to move in the other direction, when moving to close to cylinder bottom, the pressure oil manhole appendix of cylinder bottom is the input state of high pressure oil, the pressure oil manhole appendix of cylinder cap is oil return state, and the buffer function principle when buffer function of cushion cylinder to damper piston opposite side moves right with damper piston is identical.
Beneficial effect
The present invention, by a set of relief circuit of design, and coordinates gap buffer structure comprehensively to use, and the function making cushion cylinder achieve first off-load to cushion again, serves the peak value reducing cushion effect, shorten cushion stroke, cushion effect more stably.
Accompanying drawing explanation
Fig. 1 is the structural representation of cylinder apparatus of the present invention;
1-piston head, 2-piston rod, 3-cylinder barrel, 4-one-way valve piston A, 5-buffer plunger A, 6-buffer plunger B, 7-cylinder bottom, 8-cylinder cap, 9-one-way valve piston B, 10-throttling pipeline, the built-in one-way valve A of 11-built-in one-way valve B, 12-.
Embodiment
Below in conjunction with drawings and Examples, content of the present invention is elaborated.
Embodiment
The cylinder apparatus cushioned after a kind of off-load of the present invention, comprising: cylinder bottom 7, cylinder barrel 3, cylinder cap 8, the one-way valve piston that damper piston is identical with two structures,
The piston head 1 of damper piston and piston rod 2 joint are processed with the buffer plunger A5 that external diameter is greater than the cylindrical structure of piston rod external diameter, the buffer plunger B6 of cylindrical structure is extended forward at the center, front end of piston head 1, and the buffer plunger sidewall at piston head 1 two ends is all processed with the oil-feed tank expanded gradually to both sides from piston head 1.
The end of piston head one end of one-way valve piston is processed with spring fitting groove, and the piston head of one-way valve piston and piston rod joint are conical surface transition, and has the oil inlet hole of UNICOM between this transition conical surface and spring fitting groove of piston head;
In the internal diameter of cylinder barrel 3 and damper piston, the external diameter of piston head 1 matches;
The inner side end of cylinder bottom 7 is plane, the central shaft of cylinder bottom 7 inner side end is greater than the blind hole of piston head bumper post at front end plug length in damper piston to having length, the back segment of this blind hole is processed as the shoe cream room that internal diameter is greater than piston head 1 bumper post at front end plug B6 external diameter, and the oral area of this blind hole is processed as the guide section that internal diameter and piston head 1 bumper post at front end plug B6 external diameter match; In cylinder bottom central blind hole, the rear end inwall of shoe cream room is processed with pressure oil manhole appendix outside cylinder bottom; On cylinder bottom, the side of central blind hole is processed with the one-way valve piston mounting hole of radial aperture, this one-way valve piston mounting hole is three stepped cylindrical shape through holes, wherein in one-way valve piston mounting hole, the internal diameter of leading portion internal diameter minimum vias and the maximum through hole of back segment internal diameter is matched with the piston rod of one-way valve piston and the external diameter of piston head respectively, UNICOM between the stage casing through hole of one-way valve piston mounting hole and the shoe cream room of cylinder bottom central blind hole, the front inner wall of the maximum through hole of back segment internal diameter of one-way valve piston mounting hole is processed with circulating oil path through hole outside cylinder bottom;
The inner side end of cylinder cap 8 is plane, the central shaft of cylinder cap 8 is to having the through hole matched with piston rod in damper piston 2 internal diameter, the inner side oral area of this through hole is processed as the guide section that internal diameter and piston head 1 rear end buffer plunger A5 external diameter match, and the back segment of this through hole oral area guide section is processed as the shoe cream room that internal diameter is greater than piston head 1 rear end buffer plunger external diameter; In cylinder cap central through bore, the rear end inwall of shoe cream room is processed with pressure oil manhole appendix outside cylinder cap; On cylinder cap, the side of central through bore is processed with the one-way valve piston mounting hole of radial aperture, this one-way valve piston mounting hole is three stepped cylindrical shape through holes, wherein in one-way valve piston mounting hole, the internal diameter of leading portion internal diameter minimum vias and the maximum through hole of back segment internal diameter is matched with the piston rod of one-way valve piston and the external diameter of piston head respectively, UNICOM between the stage casing through hole of one-way valve piston mounting hole and the shoe cream room of cylinder cap central through bore, the front inner wall of the maximum through hole of back segment internal diameter of one-way valve piston mounting hole is processed with circulating oil path through hole outside cylinder cap;
Shoe cream room one end of cylinder bottom 7 and cylinder cap 8 is fixed on the two ends of cylinder barrel 3 inwardly simultaneously, and the piston head 1 of damper piston is positioned at the inner chamber of cylinder barrel 3, and the piston rod 2 of damper piston inserts in the central through bore of cylinder cap 8; Piston rod one end of two one-way valve pistons is inserted in two one-way valve piston mounting holes from the outside of cylinder bottom 7 and cylinder cap 8 inwardly respectively, the outer end of two one-way valve piston mounting holes is all by blocking encapsulation, and all spring is installed between each blocking and the one-way valve piston of its front end, under spring free state, in one-way valve piston, the transition conical surface of piston head and piston rod joint presses closer the rear end of one-way valve piston mounting hole stage casing through hole; Connected by throttling pipeline 10 between the circulating oil path through hole of cylinder bottom 7 and the circulating oil path through hole of cylinder cap 8, and throttling pipeline arranges throttle valve; The oil inlet hole of cylinder bottom 7 is connected with pressure oil tank respectively with the pressure oil manhole appendix of cylinder cap 8.
The pressure oil manhole appendix of cylinder bottom 7 and cylinder cap 8 all has one-way valve mounting hole to its inner side end, is all provided with the built-in one-way valve from the outside one-way flow of pressure oil manhole appendix in the one-way valve mounting hole at cylinder bottom 7 and cylinder cap 8 pressure oil manhole appendix place separately;
Be two throttling pipelines in parallel between the circulating oil path through hole of cylinder bottom 7 and the circulating oil path through hole of cylinder cap 8, every bar throttling pipeline is provided with one-way valve and throttle valve, and the adjustment direction of one-way valve is contrary on two throttling pipelines, when stressing conditions at damper piston two ends is different, what can regulate damper piston two ends respectively unloads load forces size.
Between the piston head 1 of damper piston and cylinder barrel 3 inwall, cylinder barrel 3 two ends and the joint of cylinder bottom 7 and cylinder cap 8, between the piston rod 2 of damper piston and the central through bore of cylinder cap 8, be provided with seal ring.
Under spring free state, in two one-way valve pistons, piston rod stretches out the length of respective one-way valve piston mounting hole front end, with the buffer plunger length of its homonymy on the piston head 1 being greater than damper piston respectively.
Working procedure:
Be positioned at cylinder cap 8 inner side end side for initial position with the piston head 1 of damper piston, the pressure oil manhole appendix of cylinder cap 8 is the input state of high pressure oil, and the pressure oil manhole appendix of cylinder bottom 7 is oil return state; Now, the one-way valve piston A4 of cylinder cap 8 side is under the effect of piston head 1 ear end face, Compress Spring, gets out of the way the rear end of this one-way valve piston mounting hole stage casing, side through hole, makes to be in oil circuit UNICOM between the circulating oil path through hole outside the shoe cream room of cylinder cap 8 central through bore and cylinder cap; And the one-way valve piston B9 of cylinder bottom 7 side presses closer the rear end of this one-way valve piston mounting hole stage casing, side through hole under spring reset effect by the transition conical surface of its piston head and piston rod joint.
After high pressure oil enters the shoe cream room of cylinder cap 8 central through bore from the pressure oil manhole appendix of cylinder cap 8, the high pressure oil reserved from the circulating oil path through hole outside cylinder cap flows to the circulating oil path through hole of cylinder bottom 7 by the road, oil inlet hole again on the one-way valve piston B9 transition conical surface of cylinder bottom 7 side flows into the spring position of one-way valve piston B9 rear end, promote the rear end that one-way valve piston B9 presses closer one-way valve piston mounting hole stage casing through hole together with spring, thus the piston head two ends oil pocket of damper piston is completely cut off.
The built-in one-way valve A12 of the pressure oil manhole appendix place installation of cylinder cap 8, open when this hole oil-feed, damper piston is more easily started, moving right under the promotion of high pressure oil of damper piston, after the piston head ear end face of damper piston departs from the piston rod of one-way valve piston A4, under high pressure oil effect, one-way valve piston A4 still keeps Compress Spring state; Because in one-way valve piston B9, piston rod stretches out the length of homonymy one-way valve piston mounting hole front end, be greater than the length (i.e. L1 > L2) of piston head 1 bumper post at front end plug B6 in damper piston; When damper piston continue move right, first the front-end face of its piston head contacts the piston rod of the one-way valve piston B9 of cylinder bottom 7 side, and then promote its Compress Spring; Now, the transition conical surface of the one-way valve piston B9 of cylinder bottom 7 side gets out of the way the rear end of this one-way valve piston mounting hole stage casing, side through hole, makes to be in oil circuit UNICOM between the circulating oil path through hole outside the shoe cream room of cylinder bottom 7 and cylinder bottom; The high pressure oil reserved from the circulating oil path through hole outside cylinder cap flows to the circulating oil path through hole of cylinder bottom 7 through throttling pipeline, then enters shoe cream room and the piston head front end oil pocket of cylinder bottom 7, forms relief circuit;
When the buffer plunger B6 that damper piston moves to its front end inserts the guide section of the oral area of cylinder bottom 7 central blind hole, buffer plunger B6, under the contraction of sidewall oil-feed tank, carries out throttling buffering to damper piston, damper piston is slowly moved and puts in place; Damper piston is when promoting one-way valve piston B9 Compress Spring, and the opposition of spring plays buffer function to damper piston equally.
When damper piston is done to move in the other direction, when moving to close to cylinder bottom, the pressure oil manhole appendix of cylinder bottom 7 is the input state of high pressure oil, the pressure oil manhole appendix of cylinder cap 8 is oil return state, and the buffer function principle when buffer function of cushion cylinder to damper piston opposite side moves right with damper piston is identical.
Claims (6)
1. the cylinder apparatus cushioned after off-load, is characterized in that: comprise cylinder bottom, cylinder barrel, cylinder cap, one-way valve piston that damper piston is identical with two structures;
The end of piston head one end of one-way valve piston is processed with spring fitting groove, and the piston head of one-way valve piston and piston rod joint are conical surface transition, and has the oil inlet hole of UNICOM between this transition conical surface and spring fitting groove of piston head;
In the internal diameter of cylinder barrel and damper piston, the external diameter of piston head matches;
The inner side end of cylinder bottom is plane, and the center of cylinder bottom inner side end has shoe cream room; The rear end inwall of cylinder bottom center shoe cream room is processed with pressure oil manhole appendix outside cylinder bottom; On cylinder bottom, the side of shoe cream room is processed with the one-way valve piston mounting hole of radial aperture, this one-way valve piston mounting hole is three stepped cylindrical shape through holes, wherein in one-way valve piston mounting hole, the internal diameter of leading portion internal diameter minimum vias and the maximum through hole of back segment internal diameter is matched with the piston rod of one-way valve piston and the external diameter of piston head respectively, UNICOM between the stage casing through hole of one-way valve piston mounting hole and cylinder bottom center shoe cream room, the front inner wall of the maximum through hole of back segment internal diameter of one-way valve piston mounting hole is processed with circulating oil path through hole outside cylinder bottom;
The inner side end of cylinder cap is plane, and the central shaft of cylinder cap is to having the through hole matched with piston rod internal diameter in damper piston, and the inner side of this through hole is processed with shoe cream room; In cylinder cap central through bore, the rear end inwall of shoe cream room is processed with pressure oil manhole appendix outside cylinder cap; On cylinder cap, the side of central through bore is processed with the one-way valve piston mounting hole of radial aperture, this one-way valve piston mounting hole is three stepped cylindrical shape through holes, wherein in one-way valve piston mounting hole, the internal diameter of leading portion internal diameter minimum vias and the maximum through hole of back segment internal diameter is matched with the piston rod of one-way valve piston and the external diameter of piston head respectively, UNICOM between the stage casing through hole of one-way valve piston mounting hole and the shoe cream room of cylinder cap central through bore, the front inner wall of the maximum through hole of back segment internal diameter of one-way valve piston mounting hole is processed with circulating oil path through hole outside cylinder cap;
Shoe cream room one end of cylinder bottom and cylinder cap is fixed on the two ends of cylinder barrel inwardly simultaneously, and the piston head of damper piston is positioned at the inner chamber of cylinder barrel, and the piston rod of damper piston inserts in the central through bore of cylinder cap; Piston rod one end of two one-way valve pistons is inserted in two one-way valve piston mounting holes from the outside of cylinder bottom and cylinder cap inwardly respectively, the outer end of two one-way valve piston mounting holes is all by blocking encapsulation, and all spring is installed between each blocking and the one-way valve piston of its front end, under spring free state, in one-way valve piston, the transition conical surface of piston head and piston rod joint presses closer the rear end of one-way valve piston mounting hole stage casing through hole; Connected by throttling pipeline between the circulating oil path through hole of cylinder bottom and the circulating oil path through hole of cylinder cap, and throttling pipeline arranges throttle valve; The oil inlet hole of cylinder bottom is connected with pressure oil tank respectively with the pressure oil manhole appendix of cylinder cap.
2. the cylinder apparatus cushioned after a kind of off-load as claimed in claim 1, it is characterized in that: the piston head of damper piston and piston rod joint are processed with the buffer plunger A that external diameter is greater than the cylindrical structure of piston rod external diameter, the buffer plunger B of cylindrical structure is extended forward at the center, front end of piston head, and the buffer plunger sidewall at piston head two ends is all processed with the oil-feed tank expanded gradually to both sides from piston head; The oral area of the shoe cream room of cylinder bottom is processed with the guide section that internal diameter and piston head bumper post at front end plug B external diameter match; The oral area of the shoe cream room of cylinder cap is processed with the guide section that internal diameter and piston head rear end buffer plunger A external diameter match.
3. the cylinder apparatus cushioned after a kind of off-load as claimed in claim 2, it is characterized in that: under spring free state, in two one-way valve pistons, piston rod stretches out the length of respective one-way valve piston mounting hole front end, with the buffer plunger length of its homonymy on the piston head being greater than damper piston respectively.
4. the cylinder apparatus cushioned after a kind of off-load as claimed in claim 1, it is characterized in that: the pressure oil manhole appendix of cylinder bottom and cylinder cap all has one-way valve mounting hole to its inner side end, the built-in one-way valve from the outside one-way flow of pressure oil manhole appendix is all installed in the one-way valve mounting hole at cylinder bottom and cylinder cap pressure oil manhole appendix place separately.
5. the cylinder apparatus cushioned after a kind of off-load as claimed in claim 1, it is characterized in that: be two throttling pipelines in parallel between the circulating oil path through hole of cylinder bottom and the circulating oil path through hole of cylinder cap, every bar throttling pipeline is provided with one-way valve and throttle valve, and on two throttling pipelines, the adjustment direction of one-way valve is contrary.
6. the cylinder apparatus cushioned after a kind of off-load as claimed in claim 1, is characterized in that: between the piston head of damper piston and inner wall of cylinder, cylinder barrel two ends and the joint of cylinder bottom and cylinder cap, be provided with seal ring between the piston rod of damper piston and the central through bore of cylinder cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310390525.6A CN103438050B (en) | 2013-09-02 | 2013-09-02 | The cylinder apparatus cushioned after a kind of off-load |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310390525.6A CN103438050B (en) | 2013-09-02 | 2013-09-02 | The cylinder apparatus cushioned after a kind of off-load |
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| CN103438050A CN103438050A (en) | 2013-12-11 |
| CN103438050B true CN103438050B (en) | 2015-11-25 |
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| CN201310390525.6A Expired - Fee Related CN103438050B (en) | 2013-09-02 | 2013-09-02 | The cylinder apparatus cushioned after a kind of off-load |
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|---|---|---|---|---|
| EP1178220A2 (en) * | 2000-08-02 | 2002-02-06 | Rexroth Mecman GmbH | Damped pneumatic cylinder for producing a constant, slow, linear output movement |
| CN101598156A (en) * | 2009-06-17 | 2009-12-09 | 江苏恒立高压油缸有限公司 | Floating-type cushion cylinder |
| CN202718955U (en) * | 2012-07-25 | 2013-02-06 | 浙江华昌液压机械有限公司 | Buffering oil cylinder |
| CN203441863U (en) * | 2013-09-02 | 2014-02-19 | 山西北方机械制造有限责任公司 | Oil cylinder device capable of achieving buffering after unloading |
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2013
- 2013-09-02 CN CN201310390525.6A patent/CN103438050B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1178220A2 (en) * | 2000-08-02 | 2002-02-06 | Rexroth Mecman GmbH | Damped pneumatic cylinder for producing a constant, slow, linear output movement |
| CN101598156A (en) * | 2009-06-17 | 2009-12-09 | 江苏恒立高压油缸有限公司 | Floating-type cushion cylinder |
| CN202718955U (en) * | 2012-07-25 | 2013-02-06 | 浙江华昌液压机械有限公司 | Buffering oil cylinder |
| CN203441863U (en) * | 2013-09-02 | 2014-02-19 | 山西北方机械制造有限责任公司 | Oil cylinder device capable of achieving buffering after unloading |
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| CN103438050A (en) | 2013-12-11 |
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