WO2009116155A1 - ダンパ - Google Patents

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Publication number
WO2009116155A1
WO2009116155A1 PCT/JP2008/055137 JP2008055137W WO2009116155A1 WO 2009116155 A1 WO2009116155 A1 WO 2009116155A1 JP 2008055137 W JP2008055137 W JP 2008055137W WO 2009116155 A1 WO2009116155 A1 WO 2009116155A1
Authority
WO
WIPO (PCT)
Prior art keywords
rod
cylinder
damper
dust boot
closing member
Prior art date
Application number
PCT/JP2008/055137
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
俊哉 網倉
Original Assignee
カヤバ工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by カヤバ工業株式会社 filed Critical カヤバ工業株式会社
Priority to PCT/JP2008/055137 priority Critical patent/WO2009116155A1/ja
Priority to CN2008801223669A priority patent/CN101910673A/zh
Priority to JP2010503708A priority patent/JPWO2009116155A1/ja
Priority to KR1020107020710A priority patent/KR20100119569A/ko
Priority to TW097118643A priority patent/TW200940848A/zh
Publication of WO2009116155A1 publication Critical patent/WO2009116155A1/ja

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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

Definitions

  • the present invention relates to a damper, and more particularly to a damper having dust boots.
  • Some dampers have a dust boot that covers the protruding portion of the piston rod from the cylinder in order to prevent dust from adhering to the piston rod.
  • Patent Document 1 discloses a cylinder device having a dust boot fixed to a cap welded to one end side of an outer cylinder.
  • the dust boot is fixed to the outer periphery of the cap by a fastening band.
  • the cap axial dimension is large, the rod stroke will be reduced accordingly. Further, when trying to secure the stroke of the rod, the damper becomes longer and the weight increases.
  • the present invention has been made in view of the above-described problems, and an object of the present invention is to provide a damper capable of ensuring the rod stroke without lengthening the damper.
  • the present invention relates to a cylinder in which a working fluid is sealed, a piston that moves within the cylinder at one end, a rod that protrudes from the cylinder at the other end, and a closing member that closes an opening on the rod side of the cylinder. And a dust boot that is attached to the closing member and covers a protruding portion from the cylinder in the rod, a groove portion is formed on an end surface of the closing member, and one end of the dust boot has the groove portion It is attached to the closing member by being inserted into and fixed to.
  • the dust boot is attached to the closing member by fixing one end of the dust boot to the groove formed in the closing member that closes the cylinder, a portion for attaching the dust boot to the closing member is extended. There is no need to do. Therefore, the stroke of the rod can be ensured without lengthening the damper.
  • damper 1 according to the embodiment of the present invention will be described with reference to FIG. 1 and FIG.
  • the damper 1 generates a damping force by expanding and contracting, and in the present embodiment, the damper 1 is interposed horizontally between the vehicle bodies so as to attenuate relative shaking between the vehicle bodies of the railway vehicle.
  • the damper 1 includes an outer tube 2, an inner tube 3 coaxially accommodated in the outer tube 2, a piston 4 that moves slidably along the inner periphery of the inner tube 3, and a piston 4 coupled to one end.
  • the other end includes a rod 5 that protrudes outward from the outer tube 2 in the axial direction.
  • the damper 1 of the present embodiment is a double tube type damper.
  • two oil chambers (fluid chambers) 6 and 7 are defined by the piston 4.
  • the oil chamber 6 on the rod 5 side communicates with a reservoir chamber 9 formed between the inner tube 3 and the outer tube 2 via a check valve 8.
  • the check valve 8 allows only the flow of working oil (working fluid) from the reservoir chamber 9 to the oil chamber 6.
  • the oil chamber 7 on the side opposite to the rod communicates with the reservoir chamber 9 via the pressure side damping valve 10.
  • the piston 4 is also provided with an expansion side damping valve and a pressure side damping valve.
  • the outer tube 2 and the inner tube 3 constitute the cylinder 11, and hydraulic oil is sealed in the cylinder 11.
  • the outer tube 2 is a bottomed cylindrical member, and an attachment ring 13 for attaching the damper 1 to the vehicle body is fixed to the bottom of the outer tube 2.
  • An attachment ring 14 for attaching the damper 1 to the vehicle body is also fixed to the protruding end of the rod 5.
  • the damper 1 is interposed between the vehicle bodies via the attachment rings 13 and 14 provided at both ends.
  • the cover 12 which covers the protrusion part 5a from the outer tube 2 in the rod 5 is fixed to the mounting ring 14.
  • the cover 12 has an inner diameter slightly larger than the outer diameter of the outer tube 2 and overlaps a part of the outer periphery of the outer tube 2 as shown in the figure.
  • the damper 1 Since the damper 1 is interposed between the vehicle bodies via the attachment rings 13 and 14 provided at both ends, the damper 1 is expanded and contracted by relative shaking between the vehicle bodies. Attenuating force is generated as the rod 5 moves back and forth in the inner tube 3 along with the expansion and contraction.
  • the outer periphery is supported by a stepped portion 2 a formed on the inner periphery of the outer tube 2, and the rod 5 through which the shaft core is inserted is slidably supported.
  • a rod guide 20 is provided inside the opening on the rod 5 side of the outer tube 2, the outer periphery is supported by a stepped portion 2 a formed on the inner periphery of the outer tube 2, and the rod 5 through which the shaft core is inserted is slidably supported.
  • a rod guide 20 is provided.
  • the rod guide 20 is formed with a hole 20a having a circular opening, and the end of the inner tube 3 is inserted into the inner peripheral surface of the hole 20a. As described above, the rod guide 20 closes the opening on the rod 5 side of the outer tube 2 and the inner tube 3 to partition the oil chamber 6 and the reservoir chamber 9.
  • a small diameter portion 20 b is formed on the back surface of the rod guide 20 that does not face the oil chamber 6 and the reservoir chamber 9.
  • a seal member 21 for sealing between the outer peripheral surface of the rod 5 and the inner peripheral surface of the rod guide 20 is disposed on the inner periphery of the small diameter portion 20b. The seal member 21 prevents leakage of hydraulic oil to the outside.
  • a cap member 22 whose outer periphery is screwed into the inner periphery of the outer tube 2 is assembled inside the opening end of the outer tube 2 on the rod 5 side.
  • the cap member 22 prevents the rod guide 20 from coming off from the outer tube 2.
  • the rod 5 is slidably inserted through the axis of the cap member 22.
  • the cap member 22 is formed with a fitting hole 22a into which the small diameter portion 20b of the rod guide 20 is fitted, and the rod guide 20 and the cap member 22 are integrally formed by fitting the small diameter portion 20b and the fitting hole 22a. Become.
  • the rod guide 20 and the cap member 22 constitute a closing member that closes the opening of the cylinder 11 on the rod 5 side.
  • the rod guide 20 and the cap member 22 may be configured as an integral member.
  • the dust boot 23 which covers the protrusion part 5a from the outer tube 2 in the rod 5 is attached to the cap member 22.
  • the dust boot 23 is a substantially conical cylindrical bellows-like member and is made of resin.
  • the dust boot 23 is formed to have a length that covers a part of the protruding portion 5 a of the rod 5, specifically, a length that is greater than the normal amplitude of the rod 5.
  • a lip portion 23 a having an inner diameter that is substantially the same as the outer diameter of the rod 5 is formed at the tip of the dust boot 23 on the small diameter side.
  • the lip 23 a is in sliding contact with the outer peripheral surface of the rod 5 and prevents dust from entering the dust boot 23.
  • An annular ring portion 23b is formed at the proximal end portion of the dust boot 23 on the large diameter side.
  • the dust boot 23 is fixed to the cap member 22 via the ring portion 23b.
  • a groove 24 that is recessed in a concave shape is formed on the end surface 22 b of the cap member 22, that is, the surface facing the dust boot 23.
  • the groove portion 24 is formed as an annular groove having the rod 5 as a central axis, and the depth thereof is substantially the same as the axial dimension of the ring portion 23 b of the dust boot 23.
  • the dust boot 23 is attached to the cap member 22 by the ring portion 23b being inserted into the groove portion 24 and fixed. Specifically, the ring portion 23 b is attached by being attached to the inner peripheral surface 24 a of the groove portion 24. Thus, the dust boot 23 is attached to the inside of the cap member 22.
  • annular mounting groove 24b in which the ring portion 23b is mounted on the inner peripheral surface 24a of the groove portion 24.
  • the dust boot 23 is firmly fixed to the cap member 22 by mounting the ring portion 23 b in the mounting groove 24 b of the inner peripheral surface 24 a of the groove portion 24.
  • the groove portion 24 is not limited to the annular groove, and may be constituted by a plurality of arc grooves on the same circumference.
  • the ring portion 23b is not formed in an annular shape but is formed in a shape corresponding to the groove portion 24.
  • the dust boot 23 is attached to the cap member 22 by fixing the ring portion 23 b to the groove portion 24 formed on the end surface 22 b of the cap member 22 that closes the cylinder 11.
  • the horizontal damper interposed horizontally between the bodies of the railway vehicle has been described.
  • the present invention can also be applied to a damper interposed in other equipment.
  • the damper 1 is described as a double tube type, but the present invention can also be applied to a single tube type damper.
  • the damper according to the present invention can be applied to a horizontal damper that is horizontally interposed between the vehicle bodies so as to attenuate relative fluctuations between the vehicle bodies of the railway vehicle.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Damping Devices (AREA)
PCT/JP2008/055137 2008-03-19 2008-03-19 ダンパ WO2009116155A1 (ja)

Priority Applications (5)

Application Number Priority Date Filing Date Title
PCT/JP2008/055137 WO2009116155A1 (ja) 2008-03-19 2008-03-19 ダンパ
CN2008801223669A CN101910673A (zh) 2008-03-19 2008-03-19 减震器
JP2010503708A JPWO2009116155A1 (ja) 2008-03-19 2008-03-19 ダンパ
KR1020107020710A KR20100119569A (ko) 2008-03-19 2008-03-19 댐퍼
TW097118643A TW200940848A (en) 2008-03-19 2008-05-21 Damper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2008/055137 WO2009116155A1 (ja) 2008-03-19 2008-03-19 ダンパ

Publications (1)

Publication Number Publication Date
WO2009116155A1 true WO2009116155A1 (ja) 2009-09-24

Family

ID=41090577

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/055137 WO2009116155A1 (ja) 2008-03-19 2008-03-19 ダンパ

Country Status (5)

Country Link
JP (1) JPWO2009116155A1 (zh)
KR (1) KR20100119569A (zh)
CN (1) CN101910673A (zh)
TW (1) TW200940848A (zh)
WO (1) WO2009116155A1 (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5756351B2 (ja) * 2011-06-20 2015-07-29 カヤバ工業株式会社 鉄道車両用制振装置
CN103883586A (zh) * 2014-01-07 2014-06-25 江苏大洋精锻有限公司 一种油缸防尘装置
CN104074912A (zh) * 2014-06-25 2014-10-01 彭友莲 一种防尘汽车减震器

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5635952U (zh) * 1979-08-28 1981-04-07
JPS5670390U (zh) * 1979-10-31 1981-06-10
JPS57194885U (zh) * 1981-06-05 1982-12-10
JPS57203158U (zh) * 1981-06-23 1982-12-24
JP2000257606A (ja) * 1999-03-09 2000-09-19 Tokico Ltd シリンダ装置
JP2007071246A (ja) * 2005-09-05 2007-03-22 Kayaba Ind Co Ltd ダストブーツ

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS617637U (ja) * 1984-06-20 1986-01-17 不二精器株式会社 オイルダンパ−
JPH0522835U (ja) * 1991-09-05 1993-03-26 武蔵精密工業株式会社 ボールジヨイント
JPH0610618U (ja) * 1992-07-16 1994-02-10 エヌオーケー株式会社 ダストカバ−
JPH09280370A (ja) * 1996-04-08 1997-10-28 Nabco Ltd シリンダ装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5635952U (zh) * 1979-08-28 1981-04-07
JPS5670390U (zh) * 1979-10-31 1981-06-10
JPS57194885U (zh) * 1981-06-05 1982-12-10
JPS57203158U (zh) * 1981-06-23 1982-12-24
JP2000257606A (ja) * 1999-03-09 2000-09-19 Tokico Ltd シリンダ装置
JP2007071246A (ja) * 2005-09-05 2007-03-22 Kayaba Ind Co Ltd ダストブーツ

Also Published As

Publication number Publication date
KR20100119569A (ko) 2010-11-09
JPWO2009116155A1 (ja) 2011-07-21
CN101910673A (zh) 2010-12-08
TW200940848A (en) 2009-10-01

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