WO2012060133A1 - Protection antipoussière de joint à rotule - Google Patents

Protection antipoussière de joint à rotule Download PDF

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Publication number
WO2012060133A1
WO2012060133A1 PCT/JP2011/065067 JP2011065067W WO2012060133A1 WO 2012060133 A1 WO2012060133 A1 WO 2012060133A1 JP 2011065067 W JP2011065067 W JP 2011065067W WO 2012060133 A1 WO2012060133 A1 WO 2012060133A1
Authority
WO
WIPO (PCT)
Prior art keywords
dust cover
diameter opening
section
ball joint
seal lip
Prior art date
Application number
PCT/JP2011/065067
Other languages
English (en)
Japanese (ja)
Inventor
達郎 宝泉
Original Assignee
Nok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 Nok株式会社 filed Critical Nok株式会社
Publication of WO2012060133A1 publication Critical patent/WO2012060133A1/fr

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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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C11/00—Pivots; Pivotal connections
    • F16C11/04—Pivotal connections
    • F16C11/06—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints
    • F16C11/0666—Sealing means between the socket and the inner member shaft
    • F16C11/0671—Sealing means between the socket and the inner member shaft allowing operative relative movement of joint parts due to flexing of the sealing means
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C11/00—Pivots; Pivotal connections
    • F16C11/04—Pivotal connections
    • F16C11/06—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints
    • F16C11/0619—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints the female part comprising a blind socket receiving the male part
    • F16C11/0623—Construction or details of the socket member
    • F16C11/0628—Construction or details of the socket member with linings

Definitions

  • the present invention relates to a dust cover for a ball joint.
  • the present invention also relates to a ball joint dust cover used for an automobile suspension device, a steering device, and the like.
  • a ball joint dust cover shown in FIG. 4 is known as a ball joint to which a dust cover is attached for the purpose of dust prevention and waterproofing of the ball joint joint.
  • a ball head 200 formed at one end of a ball stud 100 is held in a socket 300 as shown in FIG.
  • the shaft 400 at the other end of the ball stud 100 is fastened and fixed to the knuckle 500.
  • one end large-diameter opening 800 of the rubber elastic material dust cover 600 is fixedly held by the snap ring 900 on the outer peripheral surface of the socket 300, and the other end small-diameter opening 150 is held by the shaft 400.
  • membrane part 700 which has connected the large diameter opening part 800 and the small diameter opening part 150 is exhibiting the drum shape which protruded outside.
  • the operation of the ball joint is mainly performed in two ways: reciprocating rotation and swinging motion of the ball stud 100.
  • the seal lip portion of the dust cover provided on the surface in contact with the shaft portion 400 of the small diameter opening 150 is separated from the shaft portion 400 of the ball stud 100. It is required not to cause the phenomenon of separation (open mouth). Therefore, the small-diameter opening 150 provided with the seal lip portion of the dust cover is reinforced with a metal ring or a resin ring, and improves the sealing performance of the dust cover lip portion.
  • Patent Document 3 a mode has been proposed in which a semicircular protrusion is provided on a part of the retainer and engaged with the side surface of the small diameter opening of the dust cover.
  • An object of the present invention is to provide a dust cover for a ball joint that does not have a problem that the seal lip portion of the dust cover is separated from the shaft portion of the ball stud and the sealing function is deteriorated even at low temperature operation.
  • a ball head formed at one end of the ball stud is held in the socket, and a shaft portion at the other end of the ball stud is fastened and fixed to a knuckle.
  • the other end small-diameter opening portion is held on the outer peripheral surface of the L-shaped retainer fitted and held on the shaft portion, and the large-diameter opening and the small-diameter opening.
  • a seal lip portion is formed on a surface of the small-diameter opening that contacts the retainer outer peripheral surface, and a notch extending from the lower surface of the small-diameter opening toward the knuckle side is provided.
  • a cylindrical holding portion that extends from the outer diameter side of the retainer toward the knuckle side so as to cover the outer periphery of the seal lip portion is provided.
  • the present invention has the following effects. According to the dust cover for a ball joint of the first aspect of the present invention, there is no problem that the seal lip portion of the dust cover is separated from the shaft portion of the ball stud and the sealing function is lowered even during low temperature operation. Furthermore, according to the dust cover for a ball joint of the invention described in claim 2, since the seal lip portion of the dust cover can maintain a good seal surface pressure even at low temperature operation, there is no problem that the sealing function is lowered.
  • the ball joint dust cover according to the present invention has a ball head 2 formed at one end of a ball stud 1 held in a socket 3.
  • the shaft portion 4 at the other end is fastened and fixed to the knuckle 5, the one end large-diameter opening 8 is fixed and held on the outer peripheral surface of the socket 3, and the other end small-diameter opening portion 15 is fitted and held on the shaft portion 4.
  • It is configured to include a substantially drum-shaped film portion 7 that is held on the outer peripheral surface of the letter-shaped retainer 6 and projects outwardly connecting the large-diameter opening 8 and the small-diameter opening 15.
  • a seal lip 151 is formed on the surface of the small-diameter opening 15 that contacts the outer peripheral surface of the retainer 6. Further, a notch 152 extending from the lower surface 152 of the small-diameter opening 15 toward the knuckle 5 side is formed, and a seal lip is formed in the notch 152 from the outer diameter side of the retainer 6 toward the knuckle 5 side.
  • a cylindrical holding portion 62 is provided that extends so as to cover the outer periphery of the portion 151.
  • seal lip portions 151 There are two seal lip portions 151, and the holding portion 62 extends to a position covering the outer periphery of the seal lip portion 151 located on the ball head 2 side (upper and lower sides in the figure). For this reason, the seal lip portion 151 located on the ball head 2 side (the upper and lower sides in the figure) is between the cylindrical fitting portion 61 and the holding portion 62 that are fitted to the shaft portion 4 of the retainer 6. It can be held in a compressed state.
  • the seal lip portion 151 of the dust cover can maintain a good seal surface pressure even during low temperature operation.
  • two seal lip portions 151 are provided.
  • one or more seal lip portions 151 may be present, and at least one seal lip portion 151 whose outer periphery is covered by the holding portion 62 may be present.
  • the depth of the notch 152 is set to a length that stops approximately in the middle of the small-diameter opening portion 15. If the depth of the notch 152 is too deep, the strength of the small-diameter open portion 15 is weakened and there is a risk of cracking. If it is too shallow, the seal lip 151 is separated from the shaft portion of the ball stud and the sealing function is deteriorated. Problems occur.
  • a dust seal 153 that is in elastic contact with the lower end surface of the knuckle 5 is formed on the upper end surface of the small-diameter opening 15.
  • the presence of the dust seal 153 can prevent water and earth and sand from entering the dust cover.
  • the dust cover is formed of various rubber-like elastic materials.
  • the large-diameter opening 8 is fixedly held on the outer peripheral surface of the socket 3 by a snap ring 9.
  • the holding portion 62 is provided with an annular protrusion 611 that protrudes to the inner peripheral side, and this protrusion 611 is provided on the outer peripheral surface of the notch 152. This is a point of engaging with the depression 152. As a result, the radial movement and the axial movement of the seal lip 151 of the dust cover can be restricted, so that a good sealing function can be exhibited over a long period of time.
  • the present invention is not limited to the best mode for carrying out the invention described above, and various other configurations can be adopted without departing from the gist of the present invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pivots And Pivotal Connections (AREA)
  • Sealing Devices (AREA)

Abstract

L'objectif de la présente invention consiste à proposer une protection antipoussière de joint à rotule qui résout le problème de la diminution de la fonction d'étanchéité qui se produit dans la section lèvre de joint d'un couvercle antipoussière. Afin de traiter le problème, ce couvercle est structuré de sorte que : une section tête de rotule formée sur une extrémité d'un pivot à rotule est maintenue à l'intérieur d'un emboîtement ; une section arbre sur l'autre côté du pivot à rotule est fixée sur un joint d'articulation ; une section d'ouverture à grand diamètre sur une extrémité est maintenue solidement sur la surface externe de l'emboîtement ; une section d'ouverture à petit diamètre sur l'autre extrémité est maintenue par une surface de périphérie externe d'un dispositif de retenue dont la coupe transversale qui est en forme de L est ajustée et tenue sur la section arbre ; une section film, dépassant vers l'extérieur sur le côté externe et ayant sensiblement une forme de sablier, raccorde l'ouverture à grand diamètre et l'ouverture à petit diamètre ; une section lèvre de joint est formée sur une surface en contact avec la surface de périphérie externe du dispositif de retenue de la section d'ouverture à petit diamètre ; une découpe s'étendant depuis la surface inférieure de l'ouverture à petit diamètre vers le joint d'articulation est formée ; et à l'intérieur de la découpe, une section de support cylindrique qui s'étend depuis le côté du diamètre externe du dispositif de retenue vers le côté du joint d'articulation et qui recouvre la périphérie externe de la section lèvre de joint est formée.
PCT/JP2011/065067 2010-11-04 2011-06-30 Protection antipoussière de joint à rotule WO2012060133A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010-246990 2010-11-04
JP2010246990A JP2012097855A (ja) 2010-11-04 2010-11-04 ボールジョイント用ダストカバー

Publications (1)

Publication Number Publication Date
WO2012060133A1 true WO2012060133A1 (fr) 2012-05-10

Family

ID=46024255

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2011/065067 WO2012060133A1 (fr) 2010-11-04 2011-06-30 Protection antipoussière de joint à rotule

Country Status (2)

Country Link
JP (1) JP2012097855A (fr)
WO (1) WO2012060133A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5936064B2 (ja) * 2012-09-27 2016-06-15 Nok株式会社 ボールジョイント用ダストカバー
JP2014211182A (ja) * 2013-04-18 2014-11-13 Nok株式会社 ボールジョイント用ダストカバー
JP2019132332A (ja) * 2018-01-31 2019-08-08 Nok株式会社 ダストカバー

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61175667U (fr) * 1985-04-22 1986-11-01
JPS62174115U (fr) * 1986-04-25 1987-11-05
JPH02138219U (fr) * 1989-04-24 1990-11-19
JPH03121212U (fr) * 1990-03-27 1991-12-12
JPH03123161U (fr) * 1990-03-28 1991-12-16
DE19921952A1 (de) * 1999-05-12 2000-11-30 Zf Lemfoerder Metallwaren Ag Kugelgelenk
DE102008043248A1 (de) * 2008-10-29 2010-05-06 Zf Friedrichshafen Ag Flanschring

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61175667U (fr) * 1985-04-22 1986-11-01
JPS62174115U (fr) * 1986-04-25 1987-11-05
JPH02138219U (fr) * 1989-04-24 1990-11-19
JPH03121212U (fr) * 1990-03-27 1991-12-12
JPH03123161U (fr) * 1990-03-28 1991-12-16
DE19921952A1 (de) * 1999-05-12 2000-11-30 Zf Lemfoerder Metallwaren Ag Kugelgelenk
DE102008043248A1 (de) * 2008-10-29 2010-05-06 Zf Friedrichshafen Ag Flanschring

Also Published As

Publication number Publication date
JP2012097855A (ja) 2012-05-24

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