CN102650326A - Damper - Google Patents
Damper Download PDFInfo
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- CN102650326A CN102650326A CN2012100465993A CN201210046599A CN102650326A CN 102650326 A CN102650326 A CN 102650326A CN 2012100465993 A CN2012100465993 A CN 2012100465993A CN 201210046599 A CN201210046599 A CN 201210046599A CN 102650326 A CN102650326 A CN 102650326A
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- lining
- lid
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Abstract
The invention provides a damper used for preventing a cover from falling off from a cylinder body. By using the damper provided in the invention, the fluid can flow into and out of a fluid chamber, and then the fluid can circulate in a cylinder body (C). The fluid resistance of the fluid can be used to brake a piston rod (R). A cover (30) disposed on an opening port of the enclosed cylinder body (C) is provided with a penetrating inserting hole used for the inserting of the piston rod (R); a bush embedded hole (30H), which is inserted into the cylinder body (C), thereafter is expanded, and then is extended along the axial direction of the piston rod (R); a base end flange part (13) serving as the base end part of the bush (10), which is embedded in the bush embedded in the bush embedded hole (30H). The peripheral wall of the bush embedded hole (30H) is clamped by the outer periphery of the bush (10) and the inner periphery of the cylinder body (C).
Description
Technical field
The present invention relates to have the damper of enclosing the cylinder body of fluid through lid, especially, relate to via connecting and insert the damper that the piston rod that covers relaxes impact force.
Background technique
All the time, the known damper that the such mitigation object impact force each other of for example patent documentation 1 record is arranged.Fig. 5 is the sectional view of an example of the internal structure of this damper of expression.
As shown in Figure 5, at the cardinal extremity of the secondary cylinder C cylindraceous that forms the end, embed and be useful on the lid CP that each component parts is enclosed the inside of cylinder C.In the inside of this cylinder C, cover the mode of CP and insert setting to connect to insert along the piston rod R of the extension of central axis of cylinder C.In the small diameter portion C1 of cylinder C, be embedded with columned piston P outside on this piston rod R, in addition, in the major diameter part C2 of cylinder C, be embedded with the lining 50 that is positioned the spool-like in the major diameter part C2 outside on piston rod R.In addition, at the cardinal extremity of lining 50, be embedded with the seal ring SR in the space between seal cartridge 50 and the piston rod R outside on piston rod R.
Above-mentioned piston P forms can on the inner peripheral surface of small diameter portion C1, slide cylindric, and the inner space of small diameter portion C1 is divided into the forward end of piston P and the terminal side of piston P.Piston P is through having the axially extended throttle orifice PH along piston rod R, under the effect of the fluid resistance of regulation, silicone oil circulated between the terminal side space of the forward end space of piston P and piston P.
In the above-mentioned lining 50, in the axial central authorities of piston rod R, sleeve part 51 outer being embedded on the piston rod R cylindraceous.Link the cardinal extremity lip part 53 that has diameter bigger than sleeve part 51 than the bigger front end boss portion 52 of sleeve part 51 and same diameter at the axial two end part of sleeve part 51.In addition, front end boss portion 52 has the axially extended runner 52H along piston rod R, under the effect of fluid resistance of regulation, fluid is circulated in as the small diameter portion C1 of the forward end of front end boss portion 52 and between the outside radially of sleeve part 51.
At the outer circumferential face of lining 50, capsule 60 is arranged with the mode package of the integral body that covers this outer circumferential face.Capsule 60 is the elastomers that formed by elastic material, resin etc., forms the upwardly extending spool-like of axle at piston rod R.The opening portion of the forward end of this capsule 60 is to the radially inner side bending of piston rod R, and card hangs on the front end of front end boss portion 52, makes that the forward end of runner 52H is open.In addition, the opening portion of the terminal side of capsule 60 is also to the radially inner side bending, and card hangs on the cardinal extremity of cardinal extremity lip part 53.In such capsule 60, the position that covers the outer circumferential face of pair of flanges portion 52,53 is pushed by the inner peripheral surface of this outer circumferential face and major diameter part C2.And in the damper that constitutes like this, the space in the cylinder C is divided into following four spaces by piston P and capsule 60.
In the small diameter portion C1, with respect to the space (first space S 1) of the forward end of piston P.
In the small diameter portion C1, with respect to the space (second space S 2) of the terminal side of piston P.
The space (the 3rd space S 3) of inboard in the major diameter part C2, capsule 60.
The space (the 4th space S 4) in the outside in the major diameter part C2, capsule 60.
Between above-mentioned first space S 1 and second space S 2, via the throttle orifice PH of piston P, under the effect of the fluid resistance of stipulating, fluid circulates.In addition, between second space S 2 and the 3rd space S 3, via runner 52H, silicone oil circulates.Relative therewith, tunica 60 zonings are opened between second space S 2 and the 4th space S 4 and between the 3rd space S 3 and the 4th space S 4.
And if piston rod R is pressed in the cylinder C, then at throttle orifice PH place, limit is made in the circulation of fluid, and through the fluid resistance of such fluid, piston rod R is braked.At this moment, though the volume reducing of first space S 1, such volume-variation, the deflection to the radial outside of piston rod R of tunica 60 absorbs.In addition, if piston rod R is pulled out in cylinder C, then piston rod R is also by the fluid resistance braking through fluid.And, though the volume of first space S 1 enlarges the deflection absorption to the radially inner side of piston rod R of such volume-variation tunica 60.
The existing technology document
Patent documentation
Patent documentation 1: TOHKEMY 2007-270951 communique
But above-mentioned lid CP is fixed on the cylinder C with molten the applying of the outer circumferential face of lid CP through the inner peripheral surface of the opening portion C3 of cylinder C.On the other hand, in recent years,, required to make the above-mentioned molten required simplified equipment and cheap of applying for the reduction of the cost of production of realizing such damper.But, if save and molten apply required equipment and fix with the method beyond molten the applying, then cylinder C can die down with the joint nature of lid CP.So, in above-mentioned damper,, perhaps saved under the molten situation of applying even require again to have having changed under the situation of cylinder C and the melt-coating method of lid CP, also can make and cover CP and be difficult to the structure that comes off from cylinder C.
Summary of the invention
The present invention accomplishes in view of such situation, and its purpose is, a kind of damper that comes off from cylinder body that can suppress to cover is provided.
In order to realize such purpose; The main points of the invention of technological scheme one record do; Damper possesses cylinder body and accumulator, and this cylinder body embeds to have at cardinal extremity and connects the lid that is inserted with piston rod, and this accumulator folding and unfolding is in above-mentioned cylinder body and form the ring-type concentric with above-mentioned piston rod; Above-mentioned accumulator possesses: lining is embedded in above-mentioned piston rod and is the cylindrical shell of spool-like outside this; And capsule; This capsule is a tubular; Sandwich between above-mentioned lining and the above-mentioned cylinder body; And the fluid chamber of zoning variable volume in the annulus between the inner peripheral surface of the outer circumferential face of above-mentioned lining and above-mentioned cylinder body; Fluid is flowed into and flow out above-mentioned fluid chamber and fluid is circulated in above-mentioned cylinder body, and brake above-mentioned piston rod through the fluid resistance of this fluid, above-mentioned lid has: the perforation patchhole that supplies above-mentioned piston rod to connect to insert and expand towards the inside of above-mentioned cylinder body from above-mentioned perforation patchhole and to open and at the upwardly extending embedded hole of axle of above-mentioned piston rod; In above-mentioned embedded hole, embed the base end part of above-mentioned lining, the surrounding wall portion of above-mentioned embedded hole is by the inner peripheral surface clamping of the outer circumferential face of above-mentioned lining and above-mentioned cylinder body.
According to the invention that technological scheme one is put down in writing, the surrounding wall portion of embedded hole that is formed at lid is by the inner peripheral surface clamping of the outer circumferential face of lining and cylinder body.Thus, the outer circumferential face that is not clipped in lining with lid is compared with the structure between the inner peripheral surface of cylinder body, can suppress to cover to come off from cylinder body.
The invention that technological scheme two is put down in writing does; Above-mentioned lid has and supplies above-mentioned piston rod to connect the perforation patchhole that inserts, and prevents the oil seal part that dust is invaded in the oil seal portion that is formed with sealing oil between above-mentioned capsule and above-mentioned piston rod on the inner peripheral surface of above-mentioned perforation patchhole and at the terminal side of above-mentioned oil seal portion in above-mentioned cylinder body.
Invention according to technological scheme two is put down in writing covering the perforation patchhole that is provided with confession piston rod perforation insertion, forms oil seal portion and oil seal part on the inner peripheral surface of this perforation patchhole.Therefore, suppress, in addition, suppress to the intrusion of the dust of the fluid chamber also oil seal part of tunica from the oil seal portion of the oil leakage tunica of fluid chamber.That is, required sealing configuration is made up of lid itself between lid and the piston rod.Therefore, and compare, can reduce number of spare parts, and can reduce assembling required labour of damper and time in the structure that between lid and the piston rod seal ring is set in addition.
The main points of the invention that technological scheme three is put down in writing are: above-mentioned lid and above-mentioned capsule are one-body molded.
According to the invention that technological scheme three is put down in writing, one-body molded owing to covering with capsule, thus can reduce the number of spare parts that constitutes damper, and can reduce assembling required labour of damper and time.
The main points of the invention that technological scheme four is put down in writing are: above-mentioned lid is to fix with the mode that the inner peripheral surface of above-mentioned cylinder body engages each other.
Invention according to technological scheme four is put down in writing because the inner peripheral surface of cylinder body is fixed with the mode of mutual engaging with lid, comes off from cylinder body so can further suppress lid.
The main points of the invention that technological scheme five is put down in writing are: above-mentioned lid is to fix with the mode that the outer circumferential face of above-mentioned lining engages each other.
Invention according to technological scheme five is put down in writing because the outer circumferential face of lining is fixed with the mode of mutual engaging with lid, comes off from cylinder body so can further suppress lid.
Description of drawings
Fig. 1 is the partial sectional view of a part of cross-section structure that amplifies the damper of expression first mode of execution of the present invention.
Fig. 2 is the exploded perspective view of process of the damper of expression assembling first mode of execution.
Fig. 3 is the partial sectional view of a part of cross-section structure that amplifies the damper of expression second mode of execution of the present invention.
Fig. 4 is the partial sectional view of a part of cross-section structure that amplifies the damper of expression the 3rd mode of execution of the present invention.
Fig. 5 representes the sectional view of existing damper cross-section structure.
Among the figure:
The C-cylinder body, C1-small diameter portion, C2-major diameter part, C3-opening portion, CG-cylinder body card hanging groove, CH-air stream access hole; The CP-lid, CR, 10H-bar connect patchhole, and D-embeds width, P-piston, PH-throttle orifice, 12H, 52H-runner; The R-piston rod, S1-first space, S2-second space, S3-the 3rd space, S4-the 4th space, SR-seal ring; 10,50-lining, 10E-base end part, 11, the 51-sleeve part, 12,52-front end boss portion, 12G-front end card hanging groove, 13,53-cardinal extremity lip part; 13G-cardinal extremity card hanging groove, 13H-seals embedding hole, and 20, the 60-capsule, 21-capsule pars contractilis, 22-capsule front end grip part, distal process bar before the 22T-capsule; 23-capsule cardinal extremity grip part, 30-lid, 30a-oil seal part, 30b-oil seal portion, 30H-lining embedded hole; 30T-seals ring portion, and 31-covers pars contractilis, 32-lid front end grip part, distal process bar before the 32T-lid, 33-lid cardinal extremity grip part.
Embodiment
(first mode of execution)
Below, with reference to Fig. 1 and Fig. 2, first mode of execution that obtains damper of the present invention is specialized describes.In this mode of execution, damper wait to open and close between body and the fixing fixed side parts that open and close body as the drawer that is erected at residential equipment and door, and the impact when slowing down switching body and fixed component and colliding and the device of noise describe.
As shown in Figure 1, be embedded in the capsule 20 that package on the resinous lining 10 of piston rod R has spool-like outside.Capsule 20 is the elastomers that are made up of elastic material, resin etc., and forms as follows: on the outer circumferential face of lining 10, cover the roughly whole of lining 10, on the other hand piston rod R axially on the two end part of open lining 10.
At the center as the lining 10 of the cylindrical shell of spool-like, the bar that supplies piston rod R to connect to insert connects patchhole 10H and connects with the axially extended mode along piston rod R.In the lining 10, in the axial centre of piston rod R, sleeve part 11 outer being embedded on the piston rod R cylindraceous.
In the sleeve part 11,, be formed with the front end boss cylindraceous portion 12 that constitutes by the external diameter bigger integratedly than the external diameter of sleeve part 11 with sleeve part 11 in the axial end of piston rod R.Front end boss portion 12 has the axially extended runner 12H along piston rod R, and fluid such as silicone oil is for example circulated between the outside radially as the inside of the small diameter portion C1 of the forward end of front end boss portion 12 and sleeve part 11.On the outer circumferential face of this front end boss portion 12, depression is provided with and spreads all over whole circumferential front end card hanging groove 12G.In front end boss portion 12, bigger than external diameter with respect to the terminal side of this front end card hanging groove 12G with respect to the external diameter of the forward end of above-mentioned front end card hanging groove 12G.
In the sleeve part 11, on axial the other end of piston rod R, also be formed with integratedly by the external diameter bigger and constitute cardinal extremity lip part 13 than the external diameter of sleeve part 11 with sleeve part 11.On the outer circumferential face of this cardinal extremity lip part 13, also cave in to be provided with and spread all over whole circumferential cardinal extremity card hanging groove 13G.In cardinal extremity lip part 13; Terminal side with respect to above-mentioned cardinal extremity card hanging groove 13G; The external diameter of base end part 10E that is lining 10 is than the thickness with respect to the only big capsule 20 of external diameter of the forward end of this cardinal extremity card hanging groove 13G, and than the only little embedding width D of internal diameter of major diameter part C2.
And; If the lining 10 that will be made up of such structure sets in the cylinder C cylindraceous; Then between the inner peripheral surface of the outer circumferential face of sleeve part 11 and cylinder C, to be formed the annulus concentric with the mode that cardinal extremity lip part 13 clips with piston rod R by above-mentioned front end boss portion 12.
On the base end part of cardinal extremity lip part 13, be provided with sealing embedded hole 13H along the axially-extending of piston rod R, sealing embedded hole 13H is used to embed the seal ring SR between sealing cardinal extremity lip part 13 and the piston rod R.Insertion runs through the piston rod R of lining 10 through being embedded in the seal ring SR of sealing embedded hole 13H, guarantees and the sealing of lining 10, moves vertically with respect to lining 10 simultaneously.
In addition, in this mode of execution, piston rod R axially in, will be made as forward end with respect to a side of the front end boss portion 12 of sleeve part 11, will be made as terminal side with respect to a side of the cardinal extremity lip part 13 of sleeve part 11.
The profile that becomes the capsule 20 of spool-like forms with the mode of the outer circumferential face of following above-mentioned lining 10.In capsule 20, have as capsule pars contractilis 21 to the crooked zone of the radially inner side of piston rod R in the axial centre zoning of piston rod R.Capsule pars contractilis 21 allows changing between the state that radial outside is subjected to displacement to the state of radially inner side bending with from this state.
In the forward end of this capsule pars contractilis 21, the capsule front end cylindraceous grip part 22 that is made up of the internal diameter bigger than the internal diameter of capsule pars contractilis 21 is arranged with the mode zoning of the outer circumferential face of being close to front end boss portion 12.The internal diameter of capsule front end grip part 22 is littler than the external diameter of front end boss portion 12, and thus, capsule front end grip part 22 to be to have the state of the contractile force that shrinks to radially inner side, grips above-mentioned front end boss portion 12.
The opening portion of the forward end of capsule front end grip part 22 hangs among radially inner side bending from the front end card hanging groove 12G of front end boss portion 12 to piston rod R and card.At this moment; As stated; Bigger with respect to the external diameter of the forward end of front end card hanging groove 12G than external diameter with respect to the terminal side of this front end card hanging groove 12G; Particularly if the thickness of big capsule 20 only, then the outer surface beyond the distal process bar 22T before the capsule in the capsule front end grip part 22, roughly become a plane with the outer surface of forward end in the front end boss portion 12.Therefore, when lining 10 is assembled in the cylinder C, piston rod R axially on, the inner peripheral surface of the front end of capsule front end grip part 22 and major diameter part C2 is difficult to interfere, and then, the rolling of the capsule front end grip part 22 that can suppress to cause because of such interference.
On the outer circumferential face of capsule front end grip part 22, spread all over the circumferentially outstanding of whole capsule front end grip part 22 and be provided with as the prominent bar 22T of capsule front end slip to the outstanding prominent bar of radial outside.It is circular-arc on the axial section of piston rod R that the prominent bar 22T of capsule front end slip forms comprising, and in addition, the front end that is provided in the axial ratio capsule front end grip part 22 of piston rod R leans on the position of terminal side slightly.The external diameter of the prominent bar 22T of this capsule front end slip is bigger than the external diameter at other positions of capsule 20, and identical with the internal diameter of major diameter part C2.
At the terminal side of above-mentioned capsule pars contractilis 21, the capsule cardinal extremity cylindraceous grip part 23 that is made up of the internal diameter bigger than the internal diameter of capsule pars contractilis 21 is arranged with the mode zoning of being close to the outer circumferential face of cardinal extremity lip part 13.The internal diameter of capsule cardinal extremity grip part 23 is littler than the external diameter of cardinal extremity lip part 13, and thus, capsule cardinal extremity grip part 23 grips cardinal extremity lip part 13 with the state with the contractile force that shrinks to radially inner side.In addition, the opening portion of the terminal side of capsule cardinal extremity grip part 23 hangs among radially inner side warpage from the cardinal extremity card hanging groove 13G of cardinal extremity lip part 13 to piston rod R and card.At this moment; As stated; Since with respect to the external diameter of the terminal side of cardinal extremity card hanging groove 13G only than thickness, so the outer surface of the forward end of the outer surface of capsule cardinal extremity grip part 23 and cardinal extremity lip part 13 roughly becomes a plane with respect to the big capsule 20 of external diameter of the forward end of this cardinal extremity card hanging groove 13G.
In the sealing embedded hole 13H of cardinal extremity lip part 13, embedding has the outer seal ring SR that is embedded in piston rod R.The axial forward end of piston rod R among the seal ring SR forms the double-layered cylinder shape.The inner peripheral surface of the inner core in this double-layered cylinder to be forming to the outstanding mode of the radially inner side of piston rod R towards forward end and gradually, and continues to push the outer circumferential face of piston rod R.Thus, sealed by seal ring SR from small diameter portion C1 oil spill along the outer circumferential face of piston rod R.In addition, the outer circumferential face of the urceolus in the double-layered cylinder to be forming to the outstanding mode of the radial outside of piston rod R towards forward end and gradually, and continues the inner peripheral surface by means of press seals embedded hole 13H.Thus, the position of seal ring SR can remain among the sealing embedded hole 13H.
In addition, the axial terminal side of the piston rod R among the seal ring SR forms the cylindric of individual layer.The inner peripheral surface of the inner peripheral surface of this individual layer cylinder and the inner core of above-mentioned double-layered cylinder is continuous.In addition, on the inner peripheral surface of individual layer cylinder, circumferentially be formed with as oil seal part to the outstanding prominent bar of the radially inner side of piston rod R along it.The dust that thus, can suppress to be attached on the outer circumferential face of piston rod R through seal ring SR is invaded to the inside of accumulator and then to the inside of cylinder C from the outside of damper.
At the terminal side of cardinal extremity lip part 13, embed the opening portion of cylinder C at the upwardly extending multistage lid 30 cylindraceous of the axle of piston rod R.Be through with the bar that supplies piston rod R to connect to insert on 30 at lid and connect patchhole CR, and connect patchhole CR from this bar and expand towards cylinder interior and open and at the upwardly extending lining embedded hole 30H of axle of piston rod R.The internal diameter of lining embedded hole 30H is slightly littler than the external diameter of the external diameter of the base end part 10E of lining 10 or capsule cardinal extremity grip part 23.And; Base end part 10E, capsule cardinal extremity grip part 23 inlay busher embedded hole 30H through these linings 10; Thereby the surrounding wall portion of this lining embedded hole 30H is by the inner peripheral surface clamping of the outer circumferential face of lining 10 and major diameter part C2; In addition, the inner peripheral surface clamping of the outer circumferential face of tunica 20 and major diameter part C2.
Then, active to the damper that constitutes by said structure, especially, following explanation is carried out in the effect when lid 30 embeds among the opening portion C3 of cylinder C.
When the above-mentioned damper of assembling, at first as shown in Figure 2, the piston rod R that is fixed with piston P is connected the insertion package has the bar of the lining 10 of capsule 20 to connect among the patchhole 10H.Then, the seal ring SR between seal cartridge 10 and the piston rod R is embedded among the sealing embedded hole 13H that is formed at lining 10.And the base end part 10E of lining 10 and capsule cardinal extremity grip part 23 are embedded into seal ring SR and cover among 30 the lining embedded hole 30H.Then, for the cylinder C of having injected among the small diameter portion C1 as the oil of fluid, piston rod R inserts it into while the outer circumferential face of piston P is slided on the inner peripheral surface of small diameter portion C1 from the opening portion C3 as the cardinal extremity of this cylinder C.And; The end face butt of the forward end of the end face of the forward end of front end boss portion 12 and major diameter part C2; And the surrounding wall portion of lining embedded hole 30H embeds the opening portion C3 of cylinder C, and thus, the accumulator that is made up of lining 10 and capsule 20 is fixed on the major diameter part C2.
At this moment, the outer circumferential face of the inner peripheral surface of lining embedded hole 30H and the outer circumferential face of base end part 10E and capsule cardinal extremity grip part 23 is close to, and in addition, the outer circumferential face of lining embedded hole 30H and the inner peripheral surface of opening portion C3 are close to.That is, lining embedded hole 30H is at its terminal side, is resinous cylinder C and lining 10 clampings all, and lining embedded hole 30H is in its forward end, by resinous cylinder C with as capsule 20 clampings of elastic member.Its result, lid 30 is clamped at the terminal side of lining embedded hole 30H, and is held with the mode on the inner peripheral surface that is pressed against major diameter part C2 through the elastic force of capsule 20 in the forward end of lining embedded hole 30H.
According to such structure, the bottom surface of lining embedded hole 30H and the distance of piston P are always than the short degree that is equivalent to the depth of lining embedded hole 30H of distance of the opening end and the piston P of cylinder C.Therefore, for example, even be fulcrum with piston P the terminal side of piston rod R is applied under the situation of impact force of some, also suffered than the opening end of the cylinder C vibration of the suffered vibration of the surrounding wall portion of lining embedded hole 30H is little.Thus, can improve the sealing between major diameter part C2 and the cardinal extremity lip part 13, and can improve cover 30 with the bond strength of cylinder C.
In addition, being located at distal process bar 22T before the capsule on the outer circumferential face of capsule front end grip part 22 is fixed in the major diameter part C2 with the mode of the inner peripheral surface that is pressed against major diameter part C2.That is, the protruding end part of distal process bar 22T and the inner peripheral surface of major diameter part C2 contact along circumferential before the capsule.Therefore, sealed reliably through capsule 20 between front end boss portion 12 and the major diameter part C2.
Like this, if between front end boss portion 12 and the major diameter part C2, and sealed between cardinal extremity lip part 13 and the major diameter part C2, the annulus that then is formed between the inner peripheral surface of outer circumferential face and cylinder C of lining 10 is divided into double-deck ring-type through above-mentioned capsule 20.
Particularly, through sleeve part 11, front end boss portion 12, cardinal extremity lip part 13 and capsule 20, zoning goes out to become the 3rd space S 3 of fluid chamber.In addition, the 3rd space S 3 is communicated with the outside of accumulator via runner 12H.In addition, except that the 3rd such space S 3, go out to become the 4th space S 4 of air chamber through major diameter part C2, front end boss portion 12, cardinal extremity lip part 13 and capsule 20 zonings.With respect to the 4th space S 4, be communicated with the outside of cylinder C via the air stream access hole CH that is formed at major diameter part C2.
And in the damper of like this assembling, if piston rod R is pressed in the cylinder C, then the fluid resistance piston rod R through silicone oil etc. is braked.At this moment, the part of the fluids such as silicone oil in the cylinder C flows into the 3rd space S 3 via above-mentioned runner 12H, and big through the volume change of the 3rd space S 3, the variation of the volume in the small diameter portion C1 is absorbed by accumulator.In addition, if piston rod R draws in cylinder C, then also through fluid resistances such as silicone oil, piston rod R is braked.And the part of the fluids such as silicone oil in the cylinder C flows out from the 3rd space S 3 via above-mentioned runner 12H, and the volume through the 3rd space S 3 diminishes, and the volume-variation in the small diameter portion C1 is absorbed by accumulator.
More than, according to first mode of execution, can obtain following effect.
(1) be formed at cover 30 lining embedded hole 30H surrounding wall portion by the inner peripheral surface clamping of the outer circumferential face of the base end part 10E of lining 10 and cylinder C, and the outer circumferential face of the capsule cardinal extremity grip part 23 of tunica 20 and the inner peripheral surface clamping of cylinder C.Thus, and between the inner peripheral surface of the outer circumferential face of lining 10 and cylinder C, do not clip and cover 30 structure, do not clip between the outer circumferential face of this external capsule 20 and the inner peripheral surface of cylinder C and cover 30 structure and compare, can suppress to cover 30 and come off from cylinder C.
(second mode of execution)
Below, second mode of execution that obtains damper of the present invention is specialized with reference to Fig. 3 describes.In addition, second mode of execution is different with first mode of execution on the lid 30 of first mode of execution and the one-body molded this point of seal ring SR.Therefore, below mainly to describing with the first mode of execution various structure, for the structure identical, omit or simplify the explanation of its repetition with first mode of execution.
As shown in Figure 3, on the lining embedded hole 30H that lid 30 is had, be formed with the sealing ring portion 30T cylindraceous that extends towards lining 10 from the bottom surface of this lining embedded hole 30H.The forward end of sealing ring portion 30T forms the double-layered cylinder shape.Forming to the outstanding mode of the radially inner side of piston rod R gradually, and push the outer circumferential face of piston rod R constantly as the 30b of oil seal portion of the inner peripheral surface of the inner core in this double-layered cylinder towards forward end.Thus, sealed ring portion 30T sealing from small diameter portion C1 oil spill along the outer circumferential face of piston rod R.In addition, the outer circumferential face of the urceolus in the double-layered cylinder to be forming to the outstanding mode of the radial outside of piston rod R towards forward end and gradually, and constantly by the inner peripheral surface of means of press seals embedded hole 13H.Thus, the position of sealing ring portion 30T can remain among the sealing embedded hole 13H.
In addition, the axial terminal side of the piston rod R among the sealing ring portion 30T forms the cylindric of individual layer.The inner peripheral surface of the inner peripheral surface of this individual layer cylinder and the inner core of above-mentioned double-layered cylinder is continuous.In addition, on the inner peripheral surface of individual layer cylinder, circumferentially be formed with as oil seal part 30a to the outstanding prominent bar of the radially inner side of piston rod R along it.Thus, the dust of outer circumferential face that can suppress to be attached to piston rod R through sealing ring portion 30T, and then is invaded to the inside of cylinder C to the inside of accumulator from the outside of damper.In addition, lid 30 is formed by elastic member, so that the function of oil seal part 30a performance sealing dust, and make the 30b of oil seal portion bring into play the function of sealing oil.
More than, according to second mode of execution, on the basis of above-mentioned (1), can also obtain following effect.
(2) because the sealing ring portion 30T of lid 30 has brought into play oil seal function and dust seal function, so can save seal ring SR.Therefore, can reduce the number of spare parts that constitutes damper, and, the labour and the time of managing part can be reduced.
(the 3rd mode of execution)
Below, the 3rd mode of execution that obtains damper of the present invention is specialized with reference to Fig. 4 describes.In addition, the 3rd mode of execution is different with first mode of execution on the lid 30 of second mode of execution and capsule 20 one-body molded this point.Therefore, below mainly to describing with the second mode of execution various structure, for the structure identical, omit or simplify the explanation of its repetition with second mode of execution.
As shown in Figure 4, the surrounding wall portion of the lining embedded hole 30H that lid 30 is had forms the spool-like of the outer circumferential face of following lining 10.The axial centre of piston rod R in the surrounding wall portion of lining embedded hole 30H, zoning have the lid pars contractilis 31 of conduct to the zone of the radially inner side deflection of piston rod R.Lid pars contractilis 31 has the function corresponding with above-mentioned capsule pars contractilis 21, and permission is changing between the state of the displacement of radial outside to the state of above-mentioned radially inner side deflection with from this state.
Cover front end grip part 32 in the forward end of this lid pars contractilis 31 with the mode zoning of the outer circumferential face of being close to front end boss portion 12, this lid front end grip part 32 has the function corresponding with above-mentioned capsule front end grip part 22.The opening portion of the forward end of lid front end grip part 32 is hung among radially inner side bending from the front end card hanging groove 12G of front end boss portion 12 to piston rod R and card.The outer circumferential face of this lid front end grip part 32 spread all over whole lid front end grip part 32 circumferentially outstanding be provided with lid before distal process bar 32T, the preceding distal process bar 32T of this lid have with above-mentioned capsule before the corresponding function of distal process bar 22T.
Cover cardinal extremity grip part 33 at the terminal side of above-mentioned lid pars contractilis 31 with the mode zoning of the outer circumferential face of being close to cardinal extremity lip part 13, this lid cardinal extremity grip part 33 has the function corresponding with above-mentioned capsule cardinal extremity grip part 23.In addition, on the outer circumferential face of lid cardinal extremity grip part 33,, be formed with to the outstanding prominent bar of the radial outside of piston rod R with the mode of the set cylinder body card hanging groove CG of the inner peripheral surface that embeds major diameter part C2.And, on the inner peripheral surface of lid cardinal extremity grip part 33, form to the outstanding prominent bar of the radially inner side of piston rod R with the mode among the cardinal extremity card hanging groove 13G that embeds cardinal extremity lip part 13.
More than, according to the 3rd mode of execution, on the basis of above-mentioned (1), (2), can also obtain following effect.
(3) because the sealing ring portion 30T of lid 30 not only brings into play oil seal function and dust seal function, also bring into play the function of capsule, so can on the basis of saving seal ring SR, save capsule 20.Therefore, the number of spare parts that constitutes damper can be reduced, and the labour and the time of management part can be reduced.
(4) cardinal extremity lip part 13 tegmentums 30 center on, and the outer circumferential face of piston rod R is sealed by the 30b of oil seal portion.Therefore, even flow through between cardinal extremity lip part 13 and the lid 30 and flow under the situation of outer circumferential face of piston rod R of sealing embedded hole 13H, also can escape to outside the cylinder C by suppression fluid at the fluids such as silicone oil that are pressed into the 3rd space S 3.That is, can make the fluid that is pressed into the 3rd space S 3 be difficult to flow out to the 4th space S 4 from the 3rd space S 3.And the 4th space S 4 seals with small diameter portion C1 through the preceding distal process bar 32T of lid.Its result becomes the structure that fluid is difficult to escape to the 4th space S 4.Therefore, can make fluid be difficult to escape to outside the cylinder C from air stream access hole CH.And then, can prolong life-span of damper product.
(5) lid cardinal extremity grip part 33 is by resinous cylinder C and lining 10 clampings.In addition, on the outer circumferential face of lid cardinal extremity grip part 33, be formed with to the outstanding prominent bar of the radial outside of piston rod R to embed the mode of carving the cylinder body card hanging groove CG on the inner peripheral surface of being located at major diameter part C2.Its result, lid 30 is snapped tight in lid cardinal extremity grip part 33.Therefore, can further will cover 30 reliably and be fixed in cylinder C.
(6) lid cardinal extremity grip part 33 is by resinous cylinder C and lining 10 clampings.In addition, on the inner peripheral surface of lid cardinal extremity grip part 33, form to the outstanding prominent bar of the radially inner side of piston rod R with the mode of the cardinal extremity card hanging groove 13G that embeds cardinal extremity lip part 13.Its result, lid 30 is snapped tight in lid cardinal extremity grip part 33.Therefore, can further suppress to cover 30 comes off from cylinder C.
In addition, above-mentioned each mode of execution can also be described below and change and implement.
The outward edge tegmentum 30 of the opening portion C3 of expectation cylinder C covers.Through such structure, be installed on connect to insert cover 30 and the part of the drawer of the protruding end of the terminal side of the piston rod R that gives prominence to from cylinder C etc. can be not directly and the outward edge direct collision of opening portion C3.Its result even quilts such as above-mentioned drawer exceed under the situation about trying hard to recommend of buffer capacity of damper, also collides on the lid 30 as elastic member.Therefore, in the equal effect in acquisition and above-mentioned (1)～(6), owing to rigid element can not collide each other, so can eliminate the bruit de froissement that causes because of this collision.
In the 3rd mode of execution, the internal diameter that cardinal extremity grip part 33 is covered in expectation forms littler than the external diameter of the cardinal extremity lip part 13 of lining 10.Through such structure, lid cardinal extremity grip part 33 grips lining 10 with the state of the contractile force that the radially inner side that has to piston rod R shrinks.Therefore, obtain with the equal effect in above-mentioned (1)～(6) in, can also make cover 30 and the binding of lining 10 firmer.
In the 3rd mode of execution, on the outer circumferential face of lid cardinal extremity grip part 33, be formed with to the outstanding prominent bar of the radial outside of piston rod R, on the inner peripheral surface of lid cardinal extremity grip part 33, be formed with, but be not limited thereto to the outstanding prominent bar of the radially inner side of piston rod R.At least one side of these prominent bars also can form so-called thorn toothing.Even like this, also can obtain and the equal effect in above-mentioned (1)～(6).
The lid 30 of first mode of execution for example, can be resinous elastic member so long as the material that can deform of pushing through lining 10 and cylinder C gets final product.
In the 3rd mode of execution, under situation about being fixed with sufficiently solid power, also can save the prominent bar that is formed on the outer circumferential face that covers cardinal extremity grip part 33 with respect to cylinder C lid 30.In addition, in the 3rd mode of execution, under situation about being fixed with sufficiently solid power, also can save the prominent bar that is formed on the inner peripheral surface that covers cardinal extremity grip part 33 with respect to lining 10 lids 30.
In above-mentioned each mode of execution, the internal diameter of expectation lining embedded hole 30H forms forr a short time than the external diameter of the terminal side of lining 10.If such structure, then lining embedded hole 30H can grip lining 10 with the state with the contractile force that shrinks to radially inner side.Therefore, even before lid 30 embeds cylinder C, also can make cover 30 and the binding of accumulator firmer.
Also can be following formation: except that the end face of the terminal side of lining 10; On the end face of lid 30 forward end, also be provided with the sealing embedded hole of above-mentioned each mode of execution, perhaps only on the end face of the forward end of lid 30, be provided with the sealing embedded hole of above-mentioned each mode of execution.
The cylinder C of above-mentioned each mode of execution also can be cylindric more than three grades, perhaps also can be stepless cylindric.In a word, so long as guarantee to hold slidably the part of piston P and get final product in the inner cylinder C of cylinder C with the part that is fixed with accumulator.
Claims (6)
1. damper, it possesses cylinder body and accumulator, and this cylinder body embeds to have at cardinal extremity and connects the lid that is inserted with piston rod, and this accumulator folding and unfolding is in above-mentioned cylinder body and form the ring-type concentric with above-mentioned piston rod,
Above-mentioned accumulator possesses:
Lining, this lining are embedded in above-mentioned piston rod outward and are the cylindrical shell of spool-like; And
Capsule, this capsule is a tubular, sandwiches between above-mentioned lining and the above-mentioned cylinder body, and the fluid chamber of zoning variable volume in the annulus between the inner peripheral surface of the outer circumferential face of above-mentioned lining and above-mentioned cylinder body,
Fluid is flowed into and flow out above-mentioned fluid chamber and fluid circulated in above-mentioned cylinder body, and brake above-mentioned piston rod through the fluid resistance of this fluid,
Above-mentioned damper is characterised in that,
Above-mentioned lid has: the perforation patchhole that supplies above-mentioned piston rod to connect to insert and expand towards the inside of above-mentioned cylinder body from above-mentioned perforation patchhole and to open and at the upwardly extending embedded hole of axle of above-mentioned piston rod,
In above-mentioned embedded hole, embed the base end part of above-mentioned lining, the surrounding wall portion of above-mentioned embedded hole is by the inner peripheral surface clamping of the outer circumferential face of above-mentioned lining and above-mentioned cylinder body.
2. damper according to claim 1 is characterized in that,
Above-mentioned lid has the perforation patchhole that supplies above-mentioned piston rod perforation to insert,
Be formed with on the inner peripheral surface of above-mentioned perforation patchhole: the oil seal portion of sealing oil and prevent the oil seal part that dust is invaded in above-mentioned cylinder body between above-mentioned capsule and above-mentioned piston rod at the terminal side of above-mentioned oil seal portion.
3. damper according to claim 2 is characterized in that,
Above-mentioned lid and above-mentioned capsule are one-body molded.
4. according to any one described damper in the claim 1～3, it is characterized in that,
Above-mentioned lid is to fix with the mode that the inner peripheral surface of above-mentioned cylinder body engages each other.
5. according to any one described damper in the claim 1～3, it is characterized in that,
Above-mentioned lid is to fix with the mode that the outer circumferential face of above-mentioned lining engages each other.
6. damper according to claim 4 is characterized in that,
Above-mentioned lid is to fix with the mode that the outer circumferential face of above-mentioned lining engages each other.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-043291 | 2011-02-28 | ||
| JP2011043291A JP2012180880A (en) | 2011-02-28 | 2011-02-28 | Damper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102650326A true CN102650326A (en) | 2012-08-29 |
Family
ID=46692415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100465993A Pending CN102650326A (en) | 2011-02-28 | 2012-02-27 | Damper |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2012180880A (en) |
| CN (1) | CN102650326A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1329206A (en) * | 2000-06-08 | 2002-01-02 | 阿图罗萨里斯有限公司 | Impact-damping device, optimized device for damping impact of furniture door or drawer |
| US20020079650A1 (en) * | 2000-12-25 | 2002-06-27 | Hironobu Hosoda | Dust lip structure of oil seal for oscillation |
| CN2688953Y (en) * | 2004-04-29 | 2005-03-30 | 林新达 | Hydraulic cylinder for hinge |
| EP1748217A2 (en) * | 2005-07-27 | 2007-01-31 | Polymatech Co., Ltd. | Viscous fluid-filled damper and mounting structure for viscous fluid-filled damper |
| EP2003367A2 (en) * | 2006-03-31 | 2008-12-17 | Nifco Inc. | Speed responsive damper and impact absorbing damper device |
-
2011
- 2011-02-28 JP JP2011043291A patent/JP2012180880A/en not_active Withdrawn
-
2012
- 2012-02-27 CN CN2012100465993A patent/CN102650326A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1329206A (en) * | 2000-06-08 | 2002-01-02 | 阿图罗萨里斯有限公司 | Impact-damping device, optimized device for damping impact of furniture door or drawer |
| US20020079650A1 (en) * | 2000-12-25 | 2002-06-27 | Hironobu Hosoda | Dust lip structure of oil seal for oscillation |
| CN2688953Y (en) * | 2004-04-29 | 2005-03-30 | 林新达 | Hydraulic cylinder for hinge |
| EP1748217A2 (en) * | 2005-07-27 | 2007-01-31 | Polymatech Co., Ltd. | Viscous fluid-filled damper and mounting structure for viscous fluid-filled damper |
| EP2003367A2 (en) * | 2006-03-31 | 2008-12-17 | Nifco Inc. | Speed responsive damper and impact absorbing damper device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2012180880A (en) | 2012-09-20 |
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| C06 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20120829 |