CN102562908B - Bidirectional hydraulic buffer - Google Patents
Bidirectional hydraulic buffer Download PDFInfo
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- CN102562908B CN102562908B CN201210022148.6A CN201210022148A CN102562908B CN 102562908 B CN102562908 B CN 102562908B CN 201210022148 A CN201210022148 A CN 201210022148A CN 102562908 B CN102562908 B CN 102562908B
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Abstract
The invention discloses a bidirectional hydraulic buffer, which comprises a hydraulic cylinder, two pistons and piston connecting rods, wherein the two pistons are arranged in the hydraulic cylinder, and the piston connecting rods extend into the hydraulic cylinder from two ends of the hydraulic cylinder respectively and are connected with the two pistons respectively. The internal space of the hydraulic cylinder is divided into an outer cavity and an inner cavity by the two pistons, a channel for buffer liquid to pass through is arranged between the outer cavity and the inner cavity, the two pistons oppositely slide in the hydraulic cylinder, a spring for returning the pistons is arranged between the two pistons, and the distance between the two pistons is no less than the travel of the bidirectional hydraulic buffer when no external impact force is applied. The bidirectional hydraulic buffer is simple in structure and solves the problem that bidirectional buffer cannot be realized in a limited space in the prior art.
Description
Technical field
The present invention relates to buffer, relate in particular to a kind of two-way hydraulic buffer.
Background technique
Existing hydraulic bjuffer is general adopts a piston that connects piston rod to move in being full of the oil hydraulic cylinder of buffer solution, cushion the extraneous impulse force being passed over by piston rod, along with social development, need the hydraulic bjuffer of new form to meet different needs, such as needing bidirectional buffering on the same working position of the equipment having, be that alternately generation need to be by the pressure impulse force of buffer buffers for twocouese, at this moment just need to have symmetrically arranged two piston rods, and need these two piston rods can alternate buffering from the pressure impulse force on twocouese.
Chinese patent literature CN1309250A discloses a kind of bidirectional buffer, this bidirectional buffer comprises two-way bar bidirectional piston assembly, this two-way bar bidirectional piston assembly can alternate buffering from the impact force of twocouese, but due to being connected as a single entity for cushioning the piston rod of twocouese impulse force of this buffer, when one end work arrives buffer limit position, the other end could fully stretch out, if the impulse force coming from the outside is non-constant, likely the other end cannot arrive working position, simultaneously, when the buffer of the prior art is worked, in the situation that can only replace successively the impulse force of twocouese, could work, if one end is hit twice continuously, the other end is just hit once, in this case, the buffer of the prior art cannot be worked, or, if when needing simultaneous buffering from the impulse force of twocouese, the buffer of the prior art also cannot be worked.
Chinese patent literature CN201851578U discloses a kind of hydraulic bjuffer, this hydraulic bjuffer comprises a piston rod that connects piston, between this piston and oil hydraulic cylinder bottom, be provided with a spring, when buffer is worked, piston rod drives piston movement under the effect of extraneous impulse force, Compress Spring, after the extraneous impulse force of this piston rod buffering disappears, this piston rod and piston can be returned to original position under the effect of spring, if a spring that can allow piston set back can be set in bidirectional buffer, can solve the problem in patent documentation CN1309250A, but because two pistons of the buffer in patent documentation CN1309250A, piston rod links together, moving direction is contrary, cannot allow like this two piston rods reset simultaneously, therefore spring cannot arrange and work.If can be symmetrical arranged disclosed buffer in two cover CN201851578U on needing the working position of bidirectional buffering, also can solve the problem in patent documentation CN1309250A, but need in this case larger working space to hold this two covers buffer, while not possessing such space on its working position, cannot arrange, if the volume of scaled hydraulic bjuffer, can dwindle because of stroke thereupon, cannot reach cushioning effect.
Summary of the invention
The technical problem that the present invention solves is how in the confined space, to realize the problem of bidirectional buffering.
The present invention also further solves how, to form inner chamber and exocoel, and how the buffer solution fuel injection passage that enters exocoel from inner chamber arranges and just can make buffer can be good at playing buffer function.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is as follows:
Bidirectional buffer of the present invention, two-way hydraulic buffer, comprise an oil hydraulic cylinder, be arranged on two pistons in described oil hydraulic cylinder, and from the two ends of described oil hydraulic cylinder, stretch in this oil hydraulic cylinder respectively, and respectively with two piston rods that piston is connected described in this, described two pistons are divided into exocoel and inner chamber by the inner space of described oil hydraulic cylinder, between described exocoel and inner chamber, be provided with the passage passing through for buffer solution, it is characterized in that, described two pistons relative sliding setting in described oil hydraulic cylinder, between the piston described in two, be provided with the spring for the described piston that resets, distance while not being subject to extraneous impulse force between two described pistons is not less than the stroke of described two-way hydraulic buffer.
Preferably, described oil hydraulic cylinder comprises:
Outer cylinder body, this outer cylinder body has the chamber of a both ends open;
Two headkerchieves, are separately positioned on the two ends of the chamber of described outer cylinder body, and seal both ends open;
Two seal arrangements, are placed in respectively the two ends of the chamber of described outer cylinder body, the inner side of described two headkerchieves;
Inner cylinder body, becomes hollow columnar, in the relatively-stationary chamber that is arranged on described outer cylinder body, and and described outer cylinder body between leave the space that holds buffer solution, this space forms a part for described exocoel; Described piston relative sliding is arranged in described inner cylinder body, between described two pistons and inner cylinder body, form described inner chamber, described passage comprises between the inner chamber and exocoel described in being arranged on, for the damp channel passing through for buffer solution damping when buffer is worked, described piston rod is through described headkerchief and seal arrangement setting.
Preferably, the two ends of described inner cylinder body are respectively equipped with inner casing nozzle opening, while not working, two described pistons lay respectively at described inner cylinder body two ends, can block the position in the aperture of described inner casing nozzle opening, between described piston and described inner cylinder body, leave with described inner casing nozzle opening the gap that communicates, passes through for buffer solution, when work in one end, the inner casing nozzle opening of the other end and the gap communicating with it form described damp channel.
Preferably, described piston, inner cylinder body are the external diameter of cylindric, described piston than the little 2-4 silk of the internal diameter of described inner cylinder body, and between described piston and inner cylinder body, ring-type band gap forms described gap.
Preferably, described outer cylinder body, inner cylinder body are cylindrical body coaxial setting.
Preferably, described seal arrangement comprises cylindricality oil sealing base, the spill oil sealing of hollow, and described spill oil sealing is placed in the Baltimore groove of described headkerchief the inner and is tightly connected with its internal surface; Described cylindricality oil sealing base is arranged on the adjacent inner side of described spill oil sealing, described inner cylinder body is connected between two cylindricality oil sealing bases, and one end of described piston rod is fixedly connected with the piston in described inner cylinder body with oil sealing base through described headkerchief, spill oil sealing successively.
Preferably, closure gasket groove of described oil sealing base cylinder outer end moulding, oil suction circular groove of inner end moulding, in described closure gasket groove, be provided with the O RunddichtringO fitting with described outer cylinder body, in described oil suction circular groove and the described chamber that is arranged on described outer cylinder body, and and outer cylinder body between leave the space that holds buffer solution and be connected.
Preferably, on described oil sealing base, become the oil holding slot of a ring piston rod of mo(u)ld top half with spill oil sealing surface of contact place, the oil that while moving up and down for collecting described piston rod, body of rod surface attaches.
Preferably, on described headkerchief, form a headkerchief closure gasket groove, in this headkerchief closure gasket groove, be provided with respectively and seal with this headkerchief closure gasket groove and outer cylinder body the seal ring joining.
Preferably, described passage comprise be arranged on described piston and piston rod, for make buffer solution in exocoel fill into rapidly the drainback passage of inner chamber in piston reset process, in described drainback passage, be provided with the one-way valve that the liquid allowing in exocoel enters inner chamber.
The existing advantage for prior art of bidirectional buffer of the present invention is:
Bidirectional buffer of the present invention is oppositely arranged two pistons in an oil hydraulic cylinder, and a spring is set between it, when hydraulic pressure device is worked like this, the piston of working end also can Compress Spring in the extraneous impulse force of buffering, after extraneous impulse force disappears, piston sets back under the effect of spring, thereby adopt a spring to solve the reset issues of two pistons, the structure of the buffer of simplifying, simultaneously, under this structure, because piston can self-resetting after completing buffering work, as long as equaling the stroke of buffer, two pistons distance when not working just can complete the alternate buffering of twocouese or simultaneous buffering (when the needs alternate buffering, the stroke of buffer is the stroke of single piston and piston rod, when needs bidirectional buffering, the stroke of buffer equals two stroke of piston sums), the length of buffer also can be dwindled as much as possible like this, also contribute to reduce the volume of buffer, certainly to be on the safe side, also can be a bit larger tham the stroke of buffer, two-way hydraulic buffer of the present invention is simple in structure, solved the problem that can not realize bidirectional buffering in the confined space existing in prior art.
Accompanying drawing explanation
Fig. 1 is the sectional structure schematic diagram of one embodiment of the present of invention;
Fig. 2 is that piston, the piston rod of the employing of the embodiment in Fig. 1 crossed the radially cross-sectional schematic of through hole of piston rod;
Fig. 3 is the inner casing structural representation that embodiment shown in Fig. 1 adopts.
1-spill oil sealing, 2-piston rod, 3-outer cylinder body, 4-Returnning spring, 5-inner cylinder body, 6-pin, 7-piston rod be through hole, 8-cylindricality oil sealing base, 9-oil sealing base seal ring, 10-headkerchief, 11-inner casing nozzle opening, 12-valve opening, 13-piston, 14-oil suction circular groove, 15-headkerchief seal ring, 16-steel ball radially
Embodiment
In order to make technological scheme of the present invention clearer, below in conjunction with the drawings and specific embodiments, technological scheme of the present invention and beneficial effect are further described.
Referring to accompanying drawing 1 to 3, structural representation for one embodiment of the present of invention, this embodiment adopts and comprises inner cylinder body 5, the hydraulic cylinder structure of outer cylinder body 3, under this kind of structure, two pistons 13 are arranged in inner cylinder body 5, 2 respectively with one pistons 13 of two piston rods are connected, between two pistons 13, be provided with Returnning spring 4, during buffer work, extraneous impulse force is accepted in one end, carry out buffering work, while compression reseting spring 4, after extraneous impulse force disappears, piston rod 2 and piston 13 set back under the effect of Returnning spring 4, under structure of the present invention, adopt spring 4 to complete piston 13 on twocouese and the reset work of piston rod 2, simple in structure, for the volume of reduction buffer has been created condition.In order to complete smoothly buffering work, distance between two pistons can not be less than the stroke of buffer, and when needs alternate buffering, this stroke refers to the stroke of single piston, piston rod, when needs bidirectional buffering, this stroke just equals two stroke of piston sums.
In order to complete smoothly buffering work, space in oil hydraulic cylinder need to be divided into two chambers: inner chamber, exocoel, when buffer cushions work, buffer solution in inner chamber can be pressed into exocoel, after buffering end-of-job, in piston reset process, buffer solution in exocoel can fill into inner chamber again, in illustrated embodiment, between two pistons 13 and inner cylinder body 5, form inner chamber, the cavity space that in oil hydraulic cylinder, other parts can be communicated with inner chamber forms exocoel, also need to arrange respectively the drainback passage of inner chamber to the damping fuel injection passage of exocoel and exocoel to inner chamber, in illustrated embodiment of the present invention, inner cylinder body 5, piston 13 is cylindric, at inner cylinder body 5 two ends, have inner casing nozzle opening 11, when buffer is not worked, piston 13 is positioned at the two ends of inner cylinder body 5, the position, aperture of inner casing nozzle opening 11, 13 one-tenth " protruding " shape structures of piston, its diameter major part matches with the inwall of inner casing 5, and the external diameter of this diameter major part will be slightly less than the internal diameter of inner cylinder body 5, such as can be little 2 (1=1 * 10
-2mm), like this can between piston 13 and inner cylinder body 5 inwalls, reserve certain gap and and inner casing nozzle opening 11 communicate.When buffer is worked, the piston 13 of inoperative one end and the gap between inner cylinder body 5 form inner chamber to the damping fuel injection passage of exocoel together with nozzle opening 11, the piston 13 of work one end is descending, the inner casing nozzle opening 11 being blocked exposes, make the buffer solution of other parts of cylinder body can enter smoothly the outer cavity space on piston top, thereby complete buffering work.Certainly, piston in the present invention, inner cylinder body also can adopt other structural type, such as square, oval etc., the form in the gap of passing through for buffer solution between them also can be varied, such as passing through the mode of fluting, as long as can be communicated with inner casing nozzle opening, when buffer is worked, it is just passable that the buffer solution that inner chamber is entered to exocoel plays the effect of damping; Certainly, in other some embodiments, also can not adopt the structure of the nozzle opening on inner casing, but realize the damping of buffer from inner chamber to exocoel and pass through by offer the mode of micropore on piston piston rod.
For the drainback passage from exocoel to inner chamber, in illustrated embodiment, be on piston and piston rod, to arrange by valve opening 12 to be communicated with radially through hole 7 formations of piston rod, in valve opening 12, establish check steel ball 16, in the aperture of valve opening 12, go out to be provided with preventing that steel ball 16 from dropping out the pin 6 of valve opening 12, check steel ball and valve opening 12 coordinate formation one-way valve to make the buffer solution in exocoel can enter inner chamber, and the buffer solution in inner chamber can not enter or can only enter on a small quantity exocoel.When piston 13, the piston rod 2 that can guarantee like this buffer one end cushions work, drainback passage on it is closed, buffer solution can only enter exocoel by damping fuel injection passage, external force is cushioned fully, and after buffering finishes, piston 13, piston rod 2 reset, drainback passage is opened, thereby the buffer solution in exocoel can fill into rapidly inner chamber by drainback passage again, and then make to live, 13, piston rod 2 can Rapid reset.The piston of bidirectional buffer of the present invention, piston rod with and on fuel injection passage also can adopt other structures, such as the structure in Chinese patent literature CN201851578U, as long as can play the effect of buffering, and can be after buffering end-of-job, thereby the buffer solution in exocoel can be given and fills into fast inner chamber that piston is resetted is as early as possible just passable.
For simplified structure, reduction volume, sealing configuration will need to adopt simple seal form, claimant studies discovery, adopt a spill oil sealing can realize the good sealing of piston rod, the oil-sealing arrangement adopting in illustrated embodiment is cylindricality oil sealing base 8 and spill oil sealing 1, in order to save space, illustrated embodiment is placed in spill oil sealing 1 in the Baltimore groove of headkerchief 10 the inners and is tightly connected with its internal surface; One end of piston rod 2 is fixedly connected with the piston 13 in inner cylinder body 5 with oil sealing base 8 through headkerchief 10, spill oil sealing 1 successively.
Closure gasket groove of oil sealing base 8 cylinder top moulding, oil suction circular groove 14 of bottom moulding, is provided with the O type oil sealing base seal ring 9 fitting with described outer cylinder body in closure gasket groove, can prevent that buffer solution from spilling between seal arrangement and outer cylinder body inwall; Oil suction circular groove 14 and be arranged in the chamber of described outer cylinder body, and and outer cylinder body between leave the space that holds buffer solution and be connected, the setting of this structure, be mainly the outer cavity space that provides larger, the buffer solution of being got rid of by inner chamber while making its energy accommodating buffer work, make piston can arrive smoothly bottom, complete buffering work.
On headkerchief 10, form a headkerchief closure gasket groove, in this headkerchief closure gasket groove, be provided with respectively with this and cover the seal ring 15 that closure gasket groove and outer cylinder body sealing are joined.This seal ring 15 can be for preventing that buffer solution from providing secondary protection from spilling between seal arrangement and outer cylinder body inwall, thereby avoided because the seal ring on oil sealing base is installed not in place or damages the oil leakage phenomenon bringing.
On oil sealing base 8, become the oil holding slot of a ring piston rod of mo(u)ld top half with spill oil sealing 1 surface of contact place, the oil that while moving up and down for collecting described piston rod, body of rod surface attaches.
Bidirectional buffer of the present invention can also adopt the hydraulic cylinder structure of monomer, such as the housing structure in Chinese patent literature CN1309250A, now piston structure also will be adjusted according to the document, be that two pistons and piston rod will independently arrange, and between the independent piston arranging, spring being set, the present invention can also adopt other any hydraulic cylinder structure and pistons, piston connecting rod structure that can practical function certainly.
Claims (8)
1. two-way hydraulic buffer, comprise an oil hydraulic cylinder, be arranged on two pistons in described oil hydraulic cylinder, and from the two ends of described oil hydraulic cylinder, stretch in this oil hydraulic cylinder respectively, and respectively with two piston rods that piston is connected described in this, described two pistons are divided into exocoel and inner chamber by the inner space of described oil hydraulic cylinder, between described exocoel and inner chamber, be provided with the passage passing through for buffer solution, it is characterized in that, described two pistons relative sliding setting in described oil hydraulic cylinder, between the piston described in two, be provided with the spring for the described piston that resets, distance while not being subject to extraneous impulse force between two described pistons is not less than the stroke of single piston and piston rod,
Described oil hydraulic cylinder comprises: outer cylinder body, and this outer cylinder body has the chamber of a both ends open; Two headkerchieves, are separately positioned on the two ends of the chamber of described outer cylinder body, and seal both ends open; Two seal arrangements, are placed in respectively the two ends of the chamber of described outer cylinder body, the inner side of described two headkerchieves; Inner cylinder body, becomes hollow columnar, in the relatively-stationary chamber that is arranged on described outer cylinder body, and and described outer cylinder body between leave the space that holds buffer solution, this space forms a part for described exocoel; Described piston relative sliding is arranged in described inner cylinder body, between described two pistons and inner cylinder body, form described inner chamber, described passage comprises between the inner chamber and exocoel described in being arranged on, for the damp channel passing through for buffer solution damping when buffer is worked, described piston rod is through described headkerchief and seal arrangement setting;
The two ends of described inner cylinder body are respectively equipped with inner casing nozzle opening, while not working, two described pistons lay respectively at described inner cylinder body two ends, can block the position in the aperture of described inner casing nozzle opening, between described piston and described inner cylinder body, leave with described inner casing nozzle opening the gap that communicates, passes through for buffer solution, when work in one end, the inner casing nozzle opening of the other end and the gap communicating with it form described damp channel.
2. two-way hydraulic buffer according to claim 1, it is characterized in that, described piston, inner cylinder body are the external diameter of cylindric, described piston than the little 2-4 silk of the internal diameter of described inner cylinder body, and between described piston and inner cylinder body, ring-type band gap forms described gap.
3. two-way hydraulic buffer according to claim 1 and 2, is characterized in that, described outer cylinder body, inner cylinder body are cylindrical body coaxial setting.
4. two-way hydraulic buffer according to claim 3, is characterized in that, described seal arrangement comprises cylindricality oil sealing base, the spill oil sealing of hollow, and described spill oil sealing is placed in the Baltimore groove of described headkerchief the inner and is tightly connected with its internal surface; Described cylindricality oil sealing base is arranged on the adjacent inner side of described spill oil sealing, described inner cylinder body is connected between two cylindricality oil sealing bases, and one end of described piston rod is fixedly connected with the piston in described inner cylinder body with oil sealing base through described headkerchief, spill oil sealing successively.
5. two-way hydraulic buffer according to claim 4, it is characterized in that, closure gasket groove of described oil sealing base cylinder outer end moulding, oil suction circular groove of inner end moulding, in described closure gasket groove, be provided with the O RunddichtringO fitting with described outer cylinder body, in described oil suction circular groove and the described chamber that is arranged on described outer cylinder body, and and outer cylinder body between leave the space that holds buffer solution and be connected.
6. two-way hydraulic buffer according to claim 5, is characterized in that, becomes the oil holding slot of a ring piston rod of mo(u)ld top half, the oil that while moving up and down for collecting described piston rod, body of rod surface attaches on described oil sealing base with spill oil sealing surface of contact place.
7. two-way hydraulic buffer according to claim 6, is characterized in that, forms a headkerchief closure gasket groove on described headkerchief, is provided with respectively and seals with this headkerchief closure gasket groove and outer cylinder body the seal ring joining in this headkerchief closure gasket groove.
8. two-way hydraulic buffer according to claim 7, it is characterized in that, described passage comprise be arranged on described piston and piston rod, for make buffer solution in exocoel fill into rapidly the drainback passage of inner chamber in piston reset process, in described drainback passage, be provided with the one-way valve that the liquid allowing in exocoel enters inner chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210022148.6A CN102562908B (en) | 2012-02-01 | 2012-02-01 | Bidirectional hydraulic buffer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210022148.6A CN102562908B (en) | 2012-02-01 | 2012-02-01 | Bidirectional hydraulic buffer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102562908A CN102562908A (en) | 2012-07-11 |
| CN102562908B true CN102562908B (en) | 2014-09-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210022148.6A Expired - Fee Related CN102562908B (en) | 2012-02-01 | 2012-02-01 | Bidirectional hydraulic buffer |
Country Status (1)
| Country | Link |
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| CN (1) | CN102562908B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104006105B (en) * | 2014-05-27 | 2020-03-06 | 梁英姬 | Bidirectional shock absorber capable of adjusting damping force for large-sized cupboard and cupboard with bidirectional shock absorber |
| CN108265847B (en) * | 2018-02-27 | 2019-12-27 | 同济大学 | Piston type particle damper |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE687859C (en) * | 1938-04-03 | 1940-02-07 | Fichtel & Sachs Akt Ges | shock absorbers to equalize the air pressure within a piston rod protecting and centering |
| CN2748699Y (en) * | 2004-11-18 | 2005-12-28 | 应端忠 | Two-way gas spring |
| CN101968093B (en) * | 2010-10-11 | 2012-01-25 | 支绍华 | Hydraulic buffer |
| CN202418396U (en) * | 2012-02-01 | 2012-09-05 | 支绍华 | Bidirectional hydraulic buffer |
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2012
- 2012-02-01 CN CN201210022148.6A patent/CN102562908B/en not_active Expired - Fee Related
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| CN102562908A (en) | 2012-07-11 |
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Granted publication date: 20140903 Termination date: 20180201 |