CN103438050A - Buffer-after-unloading oil cylinder device - Google Patents
Buffer-after-unloading oil cylinder device Download PDFInfo
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- CN103438050A CN103438050A CN2013103905256A CN201310390525A CN103438050A CN 103438050 A CN103438050 A CN 103438050A CN 2013103905256 A CN2013103905256 A CN 2013103905256A CN 201310390525 A CN201310390525 A CN 201310390525A CN 103438050 A CN103438050 A CN 103438050A
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Abstract
The invention relates to a buffer-after-unloading oil cylinder device, belonging to the technical field of hydraulic control. The buffer-after-unloading oil cylinder device comprises a cylinder bottom, a cylinder tube, a cylinder lid, a buffer piston and two one-way valve pistons with the same structure. By designing an unloading circuit and matching with the slit buffer structure for comprehensive use, the buffer cylinder implements the function of buffer after unloading, and has the effects of reducing the peak value of the buffering power, shortening the buffer stroke and smoothing the buffer.
Description
Technical field
The present invention relates to the cylinder apparatus cushioned after a kind of off-load, belong to technical field of hydraulic.
Background technique
Development along with engineering machinery hydraulic technology and market, require the engineering machinery hydraulic cylinder piston movement speed more and more higher, clash into cylinder cap or cylinder bottom for fear of piston at the stroke two ends, produce noise, affect operating accuracy so that damage parts, the oil hydraulic cylinder two ends of being everlasting arrange damping device.
The buffer structure of traditional hydraulic jack has two kinds substantially: a kind of is the oil hydraulic cylinder external control, and, on the external control loop of oil hydraulic cylinder, the flow control device that throttle valve or other form are installed carries out throttling buffering control; Another kind is the oil hydraulic cylinder internal control,, at oil hydraulic cylinder indoor design damping device, realizes throttling buffering.Two kinds of damping devices all do not have unloading function, are all that oil back chamber is carried out to throttling control, and the resistance of oil return is increased, and piston is subject to larger back pressure at oil back chamber, thereby has slowed down the speed that piston moves, and reaches the purpose of avoiding clashing into cylinder cap or cylinder bottom.But the cylinder apparatus of conventional construction is when piston movement speed is very fast, and because the cushion effect peak value is excessive, cushioning effect is bad, and need larger cushion stroke to realize, increased the volume of oil cylinder.
Summary of the invention
The objective of the invention is cylinder apparatus in order to solve conventional construction when piston movement speed is very fast, exist cushioning effect bad, the shortcoming such as the cushion stroke needed is large, and the cylinder apparatus cushioned after a kind of off-load is proposed.
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 comprises: cylinder bottom, cylinder barrel, cylinder cap, damper piston and two one-way valve pistons that structure is identical,
The end of the first end of piston of one-way valve piston is processed with the 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 the spring fitting groove of this transition conical surface and piston head;
In the internal diameter of cylinder barrel and damper piston, the external diameter of piston head is complementary;
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 the pressure oil manhole appendix to the cylinder bottom outside; On cylinder bottom, a 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 ladder cylindrical holes, wherein in the one-way valve piston mounting hole, the internal diameter of the maximum through hole of leading portion internal diameter minimum vias and back segment internal diameter is matched with respectively the piston rod of one-way valve piston and the external diameter of piston head, 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 the back segment internal diameter of one-way valve piston mounting hole is processed with the circulating oil path through hole to the cylinder bottom outside;
The inner side end of cylinder cap is plane, the central shaft of cylinder cap to have with damper piston in the through hole that is complementary of piston rod internal diameter, the inboard of this through hole is processed with shoe cream room; In the cylinder cap central through bore, the rear end inwall of shoe cream room is processed with the pressure oil manhole appendix to the cylinder cap outside; On cylinder cap, a 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 ladder cylindrical holes, wherein in the one-way valve piston mounting hole, the internal diameter of the maximum through hole of leading portion internal diameter minimum vias and back segment internal diameter is matched with respectively the piston rod of one-way valve piston and the external diameter of piston head, 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 the back segment internal diameter of one-way valve piston mounting hole is processed with the circulating oil path through hole to the cylinder cap outside;
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 inserts in two one-way valve piston mounting holes from the outside of cylinder bottom and cylinder cap respectively inwardly, the outer end of two one-way valve piston mounting holes all encapsulates by obstruction, and between the one-way valve piston of each obstruction and its front end, spring all is installed, under the 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; Connect by the throttling pipeline between the circulating oil path through hole of cylinder bottom and the circulating oil path through hole of cylinder cap, and on the throttling pipeline, throttle valve is set; The pressure oil manhole appendix of the oil inlet hole of cylinder bottom and cylinder cap is connected with pressure oil tank respectively.
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 front end center of piston head, and the buffer plunger sidewall at piston head two ends all is processed with the oil-feed tank of expanding 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 are complementary; 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 are complementary.
Under the spring free state, in two one-way valve pistons, piston rod stretches out the length of one-way valve piston mounting hole front end separately, is greater than respectively on the piston head of damper piston the buffer plunger length with its homonymy.
The pressure oil manhole appendix of cylinder bottom and cylinder cap all has the one-way valve mounting hole to its inner side end, at cylinder bottom and cylinder cap, in the one-way valve mounting hole at pressure oil manhole appendix place, all is equipped with from the built-in one-way valve of the outside one-way flow of pressure oil manhole appendix separately.
Between the circulating oil path through hole of cylinder bottom and the circulating oil path through hole of cylinder cap, it is the throttling pipeline of two parallel connections, be provided with one-way valve and throttle valve on every throttling pipeline, and the adjusting opposite direction of one-way valve on the throttling pipeline two, when the stressing conditions at damper piston two ends is different, the off-load power size that can regulate respectively the damper piston two ends.
Between the piston head and inner wall of cylinder of damper piston, between the central through bore of the piston rod of the joint of cylinder barrel two ends and cylinder bottom and cylinder cap, damper piston and cylinder cap, be provided with seal ring.
Working procedure:
It is initial position that the piston head of damper piston of take is positioned at cylinder cap inner side end one side, the input state that the pressure oil manhole appendix of cylinder cap is high pressure oil, and the pressure oil manhole appendix of cylinder bottom is the oil return state; Now, the one-way valve piston A of cylinder cap one side is under the effect of piston head ear end face, Compress Spring, get out of the way the rear end of this side one-way valve piston mounting hole stage casing through hole, makes between the circulating oil path through hole in the shoe cream room of cylinder cap central through bore and the cylinder cap outside in oil circuit UNICOM; And the one-way valve piston B of cylinder bottom one side presses closer the rear end of this side one-way valve piston mounting hole stage casing through hole under the spring reset effect by the transition conical surface of its piston head and piston rod joint.
High pressure oil is from the pressure oil manhole appendix of cylinder cap enters the shoe cream room of cylinder cap central through bore, the high pressure oil that circulating oil path through hole outside cylinder cap reserves flows to the circulating oil path through hole of cylinder bottom by the road, flow into again the spring position of one-way valve piston B rear end through the oil inlet hole on the one-way valve piston B transition conical surface of cylinder bottom one side, promote one-way valve piston B and press closer the rear end of one-way valve piston mounting hole stage casing through hole together with spring, thereby make the piston head two ends oil pocket of damper piston isolated.
The built-in one-way valve A that install at the pressure oil manhole appendix place of cylinder cap, when the oil-feed of this hole, open, 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 breaks away from the piston rod of one-way valve piston A, under the high pressure oil effect, one-way valve piston A still keeps the Compress Spring state; Due to the length that piston rod in one-way valve piston B stretches out 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, at first the front-end face of its piston head contacts the piston rod of the one-way valve piston B of cylinder bottom one side, and then promote its Compress Spring; Now, the transition conical surface of the one-way valve piston B of cylinder bottom one side gets out of the way the rear end of this side one-way valve piston mounting hole stage casing through hole, makes between the circulating oil path through hole in the shoe cream room of cylinder bottom and the cylinder bottom outside in oil circuit UNICOM; The high pressure oil that circulating oil path through hole outside cylinder cap reserves flows to the circulating oil path through hole of cylinder bottom through the 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 moves to its front end when damper piston inserts the guide section of 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, make damper piston slowly motion put 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, move to while approaching cylinder bottom, the input state that the pressure oil manhole appendix of cylinder bottom is high pressure oil, the pressure oil manhole appendix of cylinder cap is the oil return state, and buffer function principle when cushion cylinder moves right with damper piston the buffer function of damper piston opposite side is identical.
Beneficial effect
The present invention is by a set of relief circuit of design, and cooperation gap buffer structure Integrated using, makes cushion cylinder realize the function that first off-load cushions again, has played the peak value that reduces cushion effect, shortens cushion stroke, cushions effect more stably.
The accompanying drawing explanation
The structural representation that Fig. 1 is cylinder apparatus of the present invention;
The 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 B of 11-, the built-in one-way valve A of 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 comprises: cylinder bottom 7, cylinder barrel 3, cylinder cap 8, damper piston and two one-way valve pistons that structure is identical,
Piston head 1 and piston rod 2 joints of damper piston 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 front end center of piston head 1, and the buffer plunger sidewall at piston head 1 two ends all is processed with the oil-feed tank of expanding gradually to both sides from piston head 1.
The end of the first end of piston of one-way valve piston is processed with the 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 the spring fitting groove of this transition conical surface and piston head;
In the internal diameter of cylinder barrel 3 and damper piston, the external diameter of piston head 1 is complementary;
The inner side end of cylinder bottom 7 is plane, the central shaft of cylinder bottom 7 inner side ends is to the blind hole that has length and be greater than piston head bumper post at front end plug length in damper piston, 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 are complementary; In the cylinder bottom central blind hole, the rear end inwall of shoe cream room is processed with the pressure oil manhole appendix to the cylinder bottom outside; On cylinder bottom, a 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 ladder cylindrical holes, wherein in the one-way valve piston mounting hole, the internal diameter of the maximum through hole of leading portion internal diameter minimum vias and back segment internal diameter is matched with respectively the piston rod of one-way valve piston and the external diameter of piston head, 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 the back segment internal diameter of one-way valve piston mounting hole is processed with the circulating oil path through hole to the cylinder bottom outside;
The inner side end of cylinder cap 8 is plane, the central shaft of cylinder cap 8 to have with damper piston in the through hole that is complementary of piston rod 2 internal diameters, the inboard 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 are complementary, 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 the cylinder cap central through bore, the rear end inwall of shoe cream room is processed with the pressure oil manhole appendix to the cylinder cap outside; On cylinder cap, a 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 ladder cylindrical holes, wherein in the one-way valve piston mounting hole, the internal diameter of the maximum through hole of leading portion internal diameter minimum vias and back segment internal diameter is matched with respectively the piston rod of one-way valve piston and the external diameter of piston head, 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 the back segment internal diameter of one-way valve piston mounting hole is processed with the circulating oil path through hole to the cylinder cap outside;
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 inserts in two one-way valve piston mounting holes from the outside of cylinder bottom 7 and cylinder cap 8 respectively inwardly, the outer end of two one-way valve piston mounting holes all encapsulates by obstruction, and between the one-way valve piston of each obstruction and its front end, spring all is installed, under the 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; Connect 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 on the throttling pipeline, throttle valve is set; The pressure oil manhole appendix of the oil inlet hole of cylinder bottom 7 and cylinder cap 8 is connected with pressure oil tank respectively.
The pressure oil manhole appendix of cylinder bottom 7 and cylinder cap 8 all has the one-way valve mounting hole to its inner side end, at cylinder bottom 7 and cylinder cap 8, in the one-way valve mounting hole at pressure oil manhole appendix place, all is equipped with from the built-in one-way valve of the outside one-way flow of pressure oil manhole appendix separately;
Between the circulating oil path through hole of cylinder bottom 7 and the circulating oil path through hole of cylinder cap 8, it is the throttling pipeline of two parallel connections, be provided with one-way valve and throttle valve on every throttling pipeline, and the adjusting opposite direction of one-way valve on the throttling pipeline two, when the stressing conditions at damper piston two ends is different, the off-load power size that can regulate respectively the damper piston two ends.
Between the piston head 1 of damper piston and cylinder barrel 3 inwalls, between the central through bore of the piston rod 2 of the joint of cylinder barrel 3 two ends and cylinder bottom 7 and cylinder cap 8, damper piston and cylinder cap 8, be provided with seal ring.
Under the spring free state, in two one-way valve pistons, piston rod stretches out the length of one-way valve piston mounting hole front end separately, is greater than respectively on the piston head 1 of damper piston the buffer plunger length with its homonymy.
Working procedure:
It is initial position that the piston head 1 of damper piston of take is positioned at cylinder cap 8 inner side end one sides, the input state that the pressure oil manhole appendix of cylinder cap 8 is high pressure oil, and the pressure oil manhole appendix of cylinder bottom 7 is the oil return state; Now, the one-way valve piston A4 of cylinder cap 8 one sides is under the effect of piston head 1 ear end face, Compress Spring, get out of the way the rear end of this side one-way valve piston mounting hole stage casing through hole, makes between the circulating oil path through hole in the shoe cream room of cylinder cap 8 central through bores and the cylinder cap outside in oil circuit UNICOM; And the one-way valve piston B9 of cylinder bottom 7 one sides presses closer the rear end of this side one-way valve piston mounting hole stage casing through hole under the spring reset effect by the transition conical surface of its piston head and piston rod joint.
High pressure oil is from the pressure oil manhole appendix of cylinder cap 8 enters the shoe cream room of cylinder cap 8 central through bores, the high pressure oil that circulating oil path through hole outside cylinder cap reserves flows to the circulating oil path through hole of cylinder bottom 7 by the road, flow into again the spring position of one-way valve piston B9 rear end through the oil inlet hole on the one-way valve piston B9 transition conical surface of cylinder bottom 7 one sides, promote one-way valve piston B9 and press closer the rear end of one-way valve piston mounting hole stage casing through hole together with spring, thereby make the piston head two ends oil pocket of damper piston isolated.
The built-in one-way valve A12 that install at the pressure oil manhole appendix place of cylinder cap 8, when the oil-feed of this hole, open, 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 breaks away from the piston rod of one-way valve piston A4, under the high pressure oil effect, one-way valve piston A4 still keeps the Compress Spring state; Due to the length that piston rod in one-way valve piston B9 stretches out homonymy one-way valve piston mounting hole front end, be greater than the length (being L1>L2) of piston head 1 bumper post at front end plug B6 in damper piston; When damper piston continue move right, at first the front-end face of its piston head contacts the piston rod of the one-way valve piston B9 of cylinder bottom 7 one sides, and then promote its Compress Spring; Now, the transition conical surface of the one-way valve piston B9 of cylinder bottom 7 one sides gets out of the way the rear end of this side one-way valve piston mounting hole stage casing through hole, makes between the circulating oil path through hole in the shoe cream room of cylinder bottom 7 and the cylinder bottom outside in oil circuit UNICOM; The high pressure oil that circulating oil path through hole outside cylinder cap reserves flows to the circulating oil path through hole of cylinder bottom 7 through the 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 moves to its front end when damper piston inserts the guide section of oral area of cylinder bottom 7 central blind holes, buffer plunger B6, under the contraction of sidewall oil-feed tank, carries out throttling buffering to damper piston, make damper piston slowly motion put 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, move to while approaching cylinder bottom, the input state that the pressure oil manhole appendix of cylinder bottom 7 is high pressure oil, the pressure oil manhole appendix of cylinder cap 8 is the oil return state, and buffer function principle when cushion cylinder moves right with damper piston the buffer function of damper piston opposite side is identical.
Claims (6)
1. the cylinder apparatus cushioned after an off-load, is characterized in that: comprise cylinder bottom, cylinder barrel, cylinder cap, damper piston and two one-way valve pistons that structure is identical;
The end of the first end of piston of one-way valve piston is processed with the 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 the spring fitting groove of this transition conical surface and piston head;
In the internal diameter of cylinder barrel and damper piston, the external diameter of piston head is complementary;
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 the pressure oil manhole appendix to the cylinder bottom outside; On cylinder bottom, a 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 ladder cylindrical holes, wherein in the one-way valve piston mounting hole, the internal diameter of the maximum through hole of leading portion internal diameter minimum vias and back segment internal diameter is matched with respectively the piston rod of one-way valve piston and the external diameter of piston head, 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 the back segment internal diameter of one-way valve piston mounting hole is processed with the circulating oil path through hole to the cylinder bottom outside;
The inner side end of cylinder cap is plane, the central shaft of cylinder cap to have with damper piston in the through hole that is complementary of piston rod internal diameter, the inboard of this through hole is processed with shoe cream room; In the cylinder cap central through bore, the rear end inwall of shoe cream room is processed with the pressure oil manhole appendix to the cylinder cap outside; On cylinder cap, a 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 ladder cylindrical holes, wherein in the one-way valve piston mounting hole, the internal diameter of the maximum through hole of leading portion internal diameter minimum vias and back segment internal diameter is matched with respectively the piston rod of one-way valve piston and the external diameter of piston head, 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 the back segment internal diameter of one-way valve piston mounting hole is processed with the circulating oil path through hole to the cylinder cap outside;
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 inserts in two one-way valve piston mounting holes from the outside of cylinder bottom and cylinder cap respectively inwardly, the outer end of two one-way valve piston mounting holes all encapsulates by obstruction, and between the one-way valve piston of each obstruction and its front end, spring all is installed, under the 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; Connect by the throttling pipeline between the circulating oil path through hole of cylinder bottom and the circulating oil path through hole of cylinder cap, and on the throttling pipeline, throttle valve is set; The pressure oil manhole appendix of the oil inlet hole of cylinder bottom and cylinder cap is connected with pressure oil tank respectively.
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 front end center of piston head, and the buffer plunger sidewall at piston head two ends all is processed with the oil-feed tank of expanding 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 are complementary; 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 are complementary.
3. the cylinder apparatus cushioned after a kind of off-load as claimed in claim 2, it is characterized in that: under the spring free state, in two one-way valve pistons, piston rod stretches out the length of one-way valve piston mounting hole front end separately, is greater than respectively on the piston head of damper piston the buffer plunger length with its homonymy.
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 the one-way valve mounting hole to its inner side end, at cylinder bottom and cylinder cap, in the one-way valve mounting hole at pressure oil manhole appendix place, all is equipped with from the built-in one-way valve of the outside one-way flow of pressure oil manhole appendix separately.
5. the cylinder apparatus cushioned after a kind of off-load as claimed in claim 1, it is characterized in that: between the circulating oil path through hole of cylinder bottom and the circulating oil path through hole of cylinder cap, be the throttling pipeline of two parallel connections, be provided with one-way valve and throttle valve on every throttling pipeline, and the adjusting opposite direction of one-way valve on two throttling pipelines.
6. the cylinder apparatus cushioned after a kind of off-load as claimed in claim 1 is characterized in that: between the piston head and inner wall of cylinder of damper piston, between the central through bore of the piston rod of the joint of cylinder barrel two ends and cylinder bottom and cylinder cap, damper piston and cylinder cap, be provided with seal ring.
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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| 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 true CN103438050A (en) | 2013-12-11 |
| CN103438050B CN103438050B (en) | 2015-11-25 |
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| CN108591167A (en) * | 2018-05-23 | 2018-09-28 | 马鞍山纽盟知识产权管理服务有限公司 | A kind of hydraulic cylinder dedicated buffering device |
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| CN108799252B (en) * | 2018-08-06 | 2024-04-16 | 山西航天清华装备有限责任公司 | Hydraulic cylinder with adjustable bidirectional buffering speed |
| CN109296584A (en) * | 2018-11-12 | 2019-02-01 | 大连君方科技有限公司 | A kind of hydraulic cylinder and method of automatic pressure control |
| CN109296584B (en) * | 2018-11-12 | 2024-02-27 | 大连君方科技有限公司 | Hydraulic cylinder and method for automatically controlling pressure |
| US10962221B2 (en) | 2018-11-13 | 2021-03-30 | Pro-Iroda Industries, Inc. | Flame gun with flow control ring |
| CN110388350A (en) * | 2019-07-24 | 2019-10-29 | 符鹏 | A kind of buffering hydraulic cylinder |
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