WO2014024669A1 - 緩衝器 - Google Patents
緩衝器 Download PDFInfo
- Publication number
- WO2014024669A1 WO2014024669A1 PCT/JP2013/069858 JP2013069858W WO2014024669A1 WO 2014024669 A1 WO2014024669 A1 WO 2014024669A1 JP 2013069858 W JP2013069858 W JP 2013069858W WO 2014024669 A1 WO2014024669 A1 WO 2014024669A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- outer shell
- piston rod
- shock absorber
- bellows
- cylindrical
- Prior art date
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/38—Covers for protection or appearance
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
- F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
- F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
- F16F9/18—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein
- F16F9/19—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein with a single cylinder and of single-tube type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/36—Special sealings, including sealings or guides for piston-rods
- F16F9/361—Sealings of the bellows-type
Definitions
- the present invention relates to a shock absorber.
- the shock absorber includes an outer shell and a piston rod slidably inserted into the outer shell.
- a piston rod When the piston rod moves relative to the outer shell in the axial direction, the piston rod moves relative to the outer shell. Demonstrates damping force.
- Such a shock absorber is used, for example, between a vehicle body and an axle in a vehicle or between a cabin and a vehicle body, and suppresses vibration of a vibration control target such as the vehicle body or a cabin by exerting a damping force. can do.
- shock absorber Since such a shock absorber is exposed to the outside and used, dust, dust and mud (hereinafter referred to as “mud”) are likely to adhere to the piston rod. Mud or the like adhering to the outer periphery of the piston rod is scraped off by a dust seal that seals the outer periphery of the piston rod when the piston rod enters the outer shell.
- mud dust, dust and mud
- the shock absorber disclosed in JP2000-81071A or JP2010-175043A protects the piston rod from mud by attaching a dust cover that covers the outer periphery of the piston rod.
- the length of the dust cover is increased, the dust cover covers the outer shell when spraying the outer surface of the outer shell, and in particular, an unpainted portion is formed at the upper end of the outer shell.
- the outer shell has an unpainted portion from the viewpoint of rust prevention of the outer shell.
- the total length of the dust cover is such that the upper end of the outer shell is slightly covered when fully extended, so that an unpainted portion does not occur.
- mud or the like easily enters the dust cover from between the outer shell and the dust cover, and the protective effect for protecting the outer periphery of the piston rod is reduced.
- the total length of the dust cover has a length that can sufficiently suppress the intrusion of mud and the like. For this reason, spray coating is performed before mounting the dust cover.
- the piston rod is pushed into the outer shell to keep the shock absorber in its most contracted state so that the sliding surface on the outer periphery of the piston rod is not coated. Processing such as painting is required. In such processing, spray coating needs to be performed with a shock absorber set on the machine, or processing such as coating the outer shell after masking the outer periphery of the piston rod is complicated, and the coating method is complicated Become. Accordingly, there arises a new problem that the painting process takes time and man-hours.
- an object of the present invention is to provide a shock absorber that can sufficiently protect the outer periphery of the piston rod and does not cause deterioration of the paint workability.
- a shock absorber comprising a cylindrical outer shell and a piston rod slidably inserted into the outer shell, wherein the shock absorber is connected to the piston rod to allow the outer shell to enter inside.
- a cylindrical dust cover to be allowed, and a cylindrical bellows having one end mounted on the outer shell and the other end always disposed in the dust cover and covering the outer periphery of the piston rod.
- FIG. 1 is a side view of a shock absorber according to an embodiment of the present invention.
- FIG. 2 is a side view of a shock absorber according to a modification of the embodiment of the present invention.
- a shock absorber 100 includes a shock absorber body D including a cylindrical outer shell 1 and a piston rod 2 slidable in the outer shell 1, and a piston rod 2. And a cylindrical dust cover 3 that allows the outer shell 1 to enter inside, and one end 4a is attached to the outer shell 1 and the other end 4b is always disposed in the dust cover 3 so that the outer periphery of the piston rod 2 is covered.
- shock absorber body D is not specifically shown, for example, an inner tube accommodated in the outer shell 1, a piston slidably inserted into the inner tube, and one end connected to the piston to form an inner tube
- a piston rod 2 that is movably inserted into the tube, an extension side chamber and a compression side chamber defined by the piston in the inner tube, and a passage that communicates the extension side chamber and the compression side chamber.
- the extension side chamber and the pressure side chamber are filled with a working fluid such as hydraulic oil.
- a working fluid for example, a liquid such as water or an aqueous solution can be used in addition to the working oil.
- the shock absorber body D in this embodiment is a single rod type in which the piston rod 2 is inserted only into the extension side chamber.
- the shock absorber body D includes a reservoir that is formed as an annular gap between the outer shell 1 and the inner tube and is filled with gas and liquid. The reservoir compensates for the volume of the piston rod 2 that enters and exits the outer shell as the shock absorber body D expands and contracts.
- the shock absorber main body D of the present embodiment is a single rod double cylinder type. Further, when the piston is directly slid on the inner periphery of the outer shell 1 to divide the extension side chamber and the pressure side chamber in the outer shell 1, a free piston is slidably inserted into the outer shell 1.
- An air chamber that compensates the volume of the piston rod 2 may be defined in the shell 1, or a gas chamber may be defined in the outer shell 1 with an elastic partition such as a bladder.
- the shock absorber body D may be a single cylinder type without an inner tube. Further, the shock absorber body D may be a double rod type instead of a single rod type.
- the outer shell 1 is a cylindrical member, and a lower end in FIG. 1 is sealed with a cap 5, and a cylindrical seal is attached to an upper end in FIG. 1 that is a piston rod side end of the outer shell 1.
- a case 6 is attached.
- the seal case 6 includes a cylindrical large diameter portion 6a attached to the inner periphery of the piston rod side end of the outer shell 1, and a flange portion 6b that protrudes radially inward from the piston rod side end of the large diameter portion 6a. And a cylindrical small-diameter portion 6c that rises from the inner periphery of the flange portion 6b to the upper end side, and an annular stopper 6d provided on the small-diameter portion 6c.
- a seal member 7 is accommodated in the small diameter portion 6c.
- the stopper 6d has an outer diameter larger than that of the small diameter portion 6c, and is attached to the upper end of the small diameter portion 6c by welding or the like.
- the seal member 7 is in contact with the outer periphery of the piston rod 2 to seal the outer periphery of the piston rod 2, thereby preventing leakage of liquid from the outer shell 1 and dust adhering to the outer periphery of the piston rod 2. And a dust seal portion 7b for scraping off.
- a dust cover 3 is attached to the upper end 2a of the piston rod 2 in FIG.
- the dust cover 3 includes an annular connecting portion 3a whose inner periphery is attached to the outer periphery of the piston rod 2, and a cover body 3b extending downward from the outer periphery of the connecting portion 3a in FIG.
- the inner diameter of the cover main body 3b is larger than the outer diameter of the outer shell 1, and the outer shell 1 can enter into the cover main body 3b.
- the dust cover 3 does not hinder expansion and contraction of the shock absorber body D.
- the bellows 4 is made of, for example, rubber or synthetic resin.
- the bellows 4 includes a cylindrical fitting portion 4c at one end 4a which is the lower end in FIG.
- the fitting portion 4 c is fitted on the outer periphery of the small diameter portion 6 c of the seal case 6.
- the bellows 4 is attached to the outer shell 1 via the seal case 6 when the fitting portion 4c is sandwiched between the flange portion 6b and the stopper 6d.
- the bellows 4 is attached to the outer shell 1, not only the bellows is directly attached to the outer shell as in a shock absorber shown in FIG. 2 described later, but also indirectly through the seal case 6 or the like. It is also included to attach to.
- the bellows 4 includes a bellows portion 4d above the fitting portion 4c.
- An annular sliding contact portion 4e is provided at the other end 4b, which is the upper end of the bellows portion 4d, and the outer periphery of the sliding contact portion 4e is in sliding contact with the inner periphery of the dust cover 3.
- the bellows 4 has a larger diameter at the other end 4b than at one end 4a attached to the outer shell 1, and the bellows portion 4d is gradually expanded toward the other end 4b.
- the sliding contact portion 4e provided on the other end 4b of the bellows 4 contacts the lower end of the connecting portion 3a of the dust cover 3, and the bellows portion 4d is compressed and contracted.
- the bellows portion 4d extends from the contracted state, so that the sliding contact portion 4e provided on the other end 4b of the bellows 4 follows the upward movement of the dust cover 3 in FIG. To do. For this reason, the other end 4b of the bellows 4 does not fall out of the dust cover 3 when the shock absorber body D is extended.
- the position of the other end 4b of the bellows 4 having a natural length (the axial length in a state in which no load is applied) when the shock absorber main body D is most extended is more than that of the lower end position of the dust cover 3. It is set to be in the upper part in the middle. For this reason, the other end 4 b of the bellows 4 is always disposed in the dust cover 3.
- the bellows 4 when the bellows 4 is attached to the outer shell 1, the bellows 4 covers the outer periphery of the piston rod 2, and the dust cover 3 and the bellows 4 block the outer space of the piston rod 2 from the outside. For this reason, adhesion of mud etc. to the piston rod 2 can be prevented.
- the bellows 4 even if the bellows 4 is attached, it does not interfere with the spray coating of the outer surface of the outer shell 1, and the length of the dust cover 3 may be the same as that of a conventional shock absorber. For this reason, even if it paints as it is, an unpainted part is not produced in the outer surface of the outer shell 1, and the rust of the outer shell 1 can be prevented. Furthermore, it is not necessary to adopt a complicated coating method such as maintaining the shock absorber body D in the most contracted state before the dust cover 3 is mounted or masking the piston rod 2 to coat the outer shell 1. Since spray painting is possible as it is, painting is very easy.
- the outer periphery of the piston rod 2 can be sufficiently protected, and the coating processability is not deteriorated.
- the vibration in the radial direction of the bellows 4 can be suppressed by sliding the outer periphery of the other end 4b of the bellows 4 on the inner periphery of the dust cover 3, the sound of the bellows 4 and the dust cover 3 can be reduced. Can be reduced.
- the bellows 4 covers the outer periphery of the piston rod 2, the bellows 4 functions as a liquid reservoir even when the liquid in the outer shell 1 gets over the seal member 7 and oozes out to the outside. Leakage of liquid can be prevented outside.
- the intrusion path of mud or the like to the piston rod 2 becomes longer than the conventional shock absorber having only the dust cover 3, so that mud or the like is less likely to enter the dust cover 3 and mud to the piston rod 2. Etc. can be prevented. Even if the other end 4b of the bellows 4 is not slidably contacted with the inner periphery of the dust cover 3, the intrusion path of mud or the like reaching the piston rod 2 is longer than a conventional shock absorber provided with only the dust cover 3. Adherence of mud and the like to the piston rod 2 can be prevented.
- the structure for fixing the bellows to the outer shell may be other than the structure described above.
- the shock absorber shown in FIG. 2 includes a bent portion 10a in which the upper end in FIG. 2 that is the piston rod side end of the outer shell 10 is bent inward.
- the bent portion 10 a fixes the seal member 11 that seals the outer periphery of the piston rod 2 and the rod guide 12 that pivotally supports the outer periphery of the piston rod 2 to the outer shell 10.
- an annular fixing portion 13b to be inserted into the inner periphery of the piston rod side end of the outer shell 10 is provided at one end 13a of the bellows 13, and the fixing portion 13b grips the bent portion 10a so that the bellows 13 is held. You may fix to the outer shell 10.
- the annular fixing portion 13b fixed to the bent portion 10a of the outer shell 10 and the bellows 13 may be separated.
- a flange is provided on the outer periphery of the one end 13a of the bellows 13
- a gripping portion is provided on the inner periphery of the fixed portion 13b so as to form a gap into which the flange is inserted with the rod guide 12.
- the bellows 13 may be fixed to the outer shell by sandwiching the flange between the holding portion of the fixing portion 13b and the rod guide 12.
- the fixing portion 13b may be made of metal or the same material as the bellows 13.
- the bellows portion 13c of the bellows 13 is made of rubber and the fixing portion 13b is made of metal, for example, the rubber forming the bellows portion 13c is integrated with the fixing portion 13b by welding, fusing, bonding, or the like. Also good.
Abstract
Description
Claims (4)
- 筒状のアウターシェルと前記アウターシェル内に摺動自在に挿入されたピストンロッドとを備える緩衝器であって、
前記ピストンロッドに連結されて内部に前記アウターシェルの進入を許容する筒状のダストカバーと、
一端が前記アウターシェルに装着され他端が常時前記ダストカバー内に配置されて前記ピストンロッドの外周を覆う筒状のベローズと、を備える緩衝器。 - 請求項1に記載の緩衝器であって、
前記ベローズの他端の外周が、前記ダストカバーの内周に摺接する緩衝器。 - 請求項1に記載の緩衝器であって、
前記アウターシェルのピストンロッド側端に設けられる筒状のシールケースをさらに備え、
前記シールケースは、
前記アウターチューブのピストンロッド側端の内周に装着される筒状の大径部と、
前記大径部のピストンロッド側端から内側へ向けて突出するフランジ部と、
前記フランジ部の内周から立ち上がる筒状の小径部と、
前記小径部に設けられる環状のストッパと、を備え、
前記ベローズは、一端に前記小径部の外周に嵌合する筒状の嵌合部を備え、
前記ベローズは、前記嵌合部が前記フランジ部と前記ストッパとで挟持されることで前記アウターシェルに固定される緩衝器。 - 請求項1に記載の緩衝器であって、
前記ベローズは、一端に前記アウターシェルのピストンロッド側端内周に挿入される環状の固定部を備え、
前記アウターシェルのピストンロッド側端には、内側へ折り曲げられる折曲部が設けられ、
前記ベローズは、前記折曲部が前記固定部を把持することで前記アウターシェルへ固定される緩衝器。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201380039092.8A CN104487730B (zh) | 2012-08-10 | 2013-07-23 | 缓冲器 |
US14/414,974 US9574635B2 (en) | 2012-08-10 | 2013-07-23 | Shock absorber |
DE201311004010 DE112013004010T5 (de) | 2012-08-10 | 2013-07-23 | Stoßdämpfer |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012177902A JP5873406B2 (ja) | 2012-08-10 | 2012-08-10 | 緩衝器 |
JP2012-177902 | 2012-08-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014024669A1 true WO2014024669A1 (ja) | 2014-02-13 |
Family
ID=50067903
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2013/069858 WO2014024669A1 (ja) | 2012-08-10 | 2013-07-23 | 緩衝器 |
Country Status (5)
Country | Link |
---|---|
US (1) | US9574635B2 (ja) |
JP (1) | JP5873406B2 (ja) |
CN (1) | CN104487730B (ja) |
DE (1) | DE112013004010T5 (ja) |
WO (1) | WO2014024669A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015185273A1 (de) * | 2014-06-05 | 2015-12-10 | Zf Friedrichshafen Ag | Kolben-zylindereinheit |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6001954B2 (ja) * | 2012-08-10 | 2016-10-05 | Kyb株式会社 | 緩衝器 |
JP6353867B2 (ja) * | 2016-06-03 | 2018-07-04 | Kyb株式会社 | 転倒防止装置 |
CN108708838A (zh) * | 2018-05-30 | 2018-10-26 | 靖西市秀美边城农业科技有限公司 | 一种波纹管缓冲器 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2163255A (en) * | 1938-04-03 | 1939-06-20 | Binder Richard | Hydraulic shock absorber of the piston and cylinder type |
JPS59197635A (ja) * | 1983-04-22 | 1984-11-09 | Bridgestone Corp | 空気ばね付油圧ダンパ− |
JPH0165439U (ja) * | 1987-10-16 | 1989-04-26 | ||
JP2007071246A (ja) * | 2005-09-05 | 2007-03-22 | Kayaba Ind Co Ltd | ダストブーツ |
JP2010116997A (ja) * | 2008-11-14 | 2010-05-27 | Kayaba Ind Co Ltd | ダストシール構造 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3165306A (en) * | 1961-08-10 | 1965-01-12 | Ford Motor Co | Resilient stop means |
DE1680679A1 (de) * | 1965-12-17 | 1970-03-12 | Fichtel & Sachs Ag | Hydropneumatische Federung |
DE1505522B1 (de) * | 1966-01-08 | 1970-04-30 | Bilstein August Fa | Hydropneumatischer Einrohr-Teleskopstossdaempfer mit davon unabhaengiger,parallel geschalteter Gasfeder und selbsttaetig steuerbarem Daempfungsgrad,insbesondere fuer Kraftfahrzeuge |
FR2427515A1 (fr) * | 1978-05-29 | 1979-12-28 | Peugeot | Dispositif protecteur, notamment pour tige d'amortisseur telescopique |
DE2845243A1 (de) * | 1978-10-18 | 1980-04-30 | Audi Nsu Auto Union Ag | Faltenbalg fuer ein teleskopierbares bauteil |
FR2662181B1 (fr) * | 1990-05-17 | 1993-07-16 | Unirec | Acier inoxydable pour utilisation en milieux aquatiques naturels. |
JP4130018B2 (ja) | 1998-09-04 | 2008-08-06 | 株式会社ショーワ | 油圧緩衝器のダストカバー |
JP2010175043A (ja) | 2009-01-30 | 2010-08-12 | Hitachi Automotive Systems Ltd | シリンダ装置の製造方法 |
-
2012
- 2012-08-10 JP JP2012177902A patent/JP5873406B2/ja active Active
-
2013
- 2013-07-23 WO PCT/JP2013/069858 patent/WO2014024669A1/ja active Application Filing
- 2013-07-23 DE DE201311004010 patent/DE112013004010T5/de not_active Withdrawn
- 2013-07-23 US US14/414,974 patent/US9574635B2/en active Active
- 2013-07-23 CN CN201380039092.8A patent/CN104487730B/zh not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2163255A (en) * | 1938-04-03 | 1939-06-20 | Binder Richard | Hydraulic shock absorber of the piston and cylinder type |
JPS59197635A (ja) * | 1983-04-22 | 1984-11-09 | Bridgestone Corp | 空気ばね付油圧ダンパ− |
JPH0165439U (ja) * | 1987-10-16 | 1989-04-26 | ||
JP2007071246A (ja) * | 2005-09-05 | 2007-03-22 | Kayaba Ind Co Ltd | ダストブーツ |
JP2010116997A (ja) * | 2008-11-14 | 2010-05-27 | Kayaba Ind Co Ltd | ダストシール構造 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015185273A1 (de) * | 2014-06-05 | 2015-12-10 | Zf Friedrichshafen Ag | Kolben-zylindereinheit |
Also Published As
Publication number | Publication date |
---|---|
JP2014035048A (ja) | 2014-02-24 |
US20150167775A1 (en) | 2015-06-18 |
CN104487730B (zh) | 2016-06-15 |
JP5873406B2 (ja) | 2016-03-01 |
CN104487730A (zh) | 2015-04-01 |
DE112013004010T5 (de) | 2015-04-23 |
US9574635B2 (en) | 2017-02-21 |
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