JPWO2015186441A1 - Dust cover for ball joint - Google Patents

Dust cover for ball joint Download PDF

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JPWO2015186441A1
JPWO2015186441A1 JP2015061926A JP2015542078A JPWO2015186441A1 JP WO2015186441 A1 JPWO2015186441 A1 JP WO2015186441A1 JP 2015061926 A JP2015061926 A JP 2015061926A JP 2015542078 A JP2015542078 A JP 2015542078A JP WO2015186441 A1 JPWO2015186441 A1 JP WO2015186441A1
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dust cover
peripheral
ring
diameter opening
ball joint
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JP5839314B1 (ja
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達郎 宝泉
達郎 宝泉
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Nok株式会社
Nok株式会社
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Priority to JP2014117486 priority
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Priority to JP2015542078A priority patent/JP5839314B1/ja
Priority to PCT/JP2015/061926 priority patent/WO2015186441A1/ja
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C11/00Pivots; Pivotal connections
    • F16C11/04Pivotal connections
    • F16C11/06Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints
    • F16C11/0666Sealing means between the socket and the inner member shaft
    • F16C11/0671Sealing means between the socket and the inner member shaft allowing operative relative movement of joint parts due to flexing of the sealing means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C11/00Pivots; Pivotal connections
    • F16C11/04Pivotal connections
    • F16C11/06Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints
    • F16C11/0619Ball-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
    • F16C11/0623Construction or details of the socket member
    • F16C11/0628Construction or details of the socket member with linings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16JPISTONS; CYLINDERS; SEALINGS
    • F16J15/00Sealings
    • F16J15/50Sealings between relatively-movable members, by means of a sealing without relatively-moving surfaces, e.g. fluid-tight sealings for transmitting motion through a wall
    • F16J15/52Sealings between relatively-movable members, by means of a sealing without relatively-moving surfaces, e.g. fluid-tight sealings for transmitting motion through a wall by means of sealing bellows or diaphragms
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16JPISTONS; CYLINDERS; SEALINGS
    • F16J3/00Diaphragms; Bellows; Bellows pistons
    • F16J3/04Bellows
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16JPISTONS; CYLINDERS; SEALINGS
    • F16J3/00Diaphragms; Bellows; Bellows pistons
    • F16J3/04Bellows
    • F16J3/041Non-metallic bellows
    • F16J3/042Fastening details

Abstract

本発明は、低温雰囲気下においても、いわゆる小径開口部の口開き現象の発生を抑えると共に、小径開口部のシール性能が良好なボールジョイント用ダストカバーを提供することを目的とする。このため、ボールスタッドの一端に形成された球頭部がソケット内に保持され、前記ボールスタッドの他端の軸はナックルに締め付け固定され、一端大径開口部が、前記ソケットの外周面に固定保持され、他端小径開口部が、硬質材製の補強環を備えると共に、前記軸と密封摺動するシールリップを形成したボールジョイント用ダストカバーにおいて、前記補強環の内周面と前記シールリップの外周側との間に環状溝部を形成し、前記補強環の内周面に固定保持される円筒部と、前記円筒部の軸方向一端から折り返す形で前記円筒部の内周面側に存在して、前記シールリップを前記軸の外周面側に押圧する円周上等配のスリットを形成したバネ部とより成る金属バネ環を前記環状溝部内に配置する構成とした。An object of the present invention is to provide a dust cover for a ball joint that suppresses the occurrence of a so-called opening phenomenon of a small-diameter opening and has a good sealing performance for the small-diameter opening even in a low-temperature atmosphere. For this reason, the ball head formed at one end of the ball stud is held in the socket, the shaft at the other end of the ball stud is fastened and fixed to the knuckle, and the large-diameter opening is fixed to the outer peripheral surface of the socket. In the dust cover for a ball joint in which the other end small-diameter opening includes a hard material reinforcing ring and a seal lip that slides and slides with the shaft, the inner peripheral surface of the reinforcing ring and the seal lip An annular groove portion is formed between the outer peripheral side of the cylindrical portion, a cylindrical portion that is fixedly held on the inner peripheral surface of the reinforcing ring, and an inner peripheral surface side of the cylindrical portion that is folded back from one axial end of the cylindrical portion. Then, a metal spring ring including a spring portion formed with a circumferentially spaced slit that presses the seal lip toward the outer peripheral surface side of the shaft is arranged in the annular groove portion.

Description

本発明は、ボールジョイント用ダストカバーに関する。
また、本発明は、自動車懸架装置、操舵装置等に使用されるボールジョイント用ダストカバーに関する。
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.

従来、ボールジョイント継ぎ手部の防塵、防水を目的としてダストカバーが装着されているボールジョイントとしては図12に記載のボールジョイント用ダストカバーが知られている。(特許文献1)   Conventionally, a ball joint dust cover shown in FIG. 12 is known as a ball joint to which a dust cover is attached for the purpose of dustproofing and waterproofing the ball joint joint. (Patent Document 1)

この種ボールジョイント用ダストカバーのシール構造は、ボールスタッド100の一端に形成された球頭部200がソケット300内に保持されている。
そして、ボールスタッド100の他端の軸400は、ナックル500に締め付け固定されている。
一方、弾性材製ダストカバー600の断面略コ字形状の一端大径開口部800が、ソケット300の外周面に形成された環状のソケット溝部310内に、円環状押さえリング700により固定保持され、断面L字形状の金属材製の補強環が埋設された他端小径開口部150が軸400に保持された構成となっている。そして、この金属補強環と軸400との間に存在するゴム状弾性材製のシールリップが適度に圧縮され、そのゴムの反発力(緊迫力)と追随性により、ボールスタッド100の揺動運動に対してシール性を発揮する形を取っている。
In this kind of ball joint dust cover sealing structure, a ball head 200 formed at one end of a ball stud 100 is held in a socket 300.
The shaft 400 at the other end of the ball stud 100 is fastened and fixed to the knuckle 500.
On the other hand, one end large-diameter opening 800 having a substantially U-shaped cross section of the dust cover 600 made of an elastic material is fixed and held in an annular socket groove 310 formed on the outer peripheral surface of the socket 300 by an annular pressing ring 700. The other end small-diameter opening 150 in which a reinforcing ring made of a metal material having an L-shaped cross section is embedded is held on the shaft 400. The rubber-like elastic seal lip existing between the metal reinforcing ring and the shaft 400 is appropriately compressed, and the ball stud 100 swings due to the repulsive force (tightening force) and followability of the rubber. It takes the form that demonstrates the sealing performance against.

しかし、この種従来の弾性材製ダストカバー600は、図12に示す様にボールスタッド100が傾斜した状態で揺動すると、弾性材製ダストカバー600の膜部が伸びる側(図上右側)において、小径開口部150を引き伸ばす力が作用する為、小径開口部150のリップ部とナックル500との接触が外れる、いわゆる小径開口部150の口開き現象が発生する。
この結果、小径開口部150におけるシール性能が低下し、外部から土砂や塵芥がダストカバー600内に浸入する問題を惹起した。
However, this type of conventional dust cover 600 made of elastic material, when the ball stud 100 is swung in an inclined state as shown in FIG. 12, is on the side where the film portion of the elastic material dust cover 600 extends (the right side in the figure). Since the force that stretches the small diameter opening 150 is applied, the contact between the lip portion of the small diameter opening 150 and the knuckle 500 is released, and a so-called opening phenomenon of the small diameter opening 150 occurs.
As a result, the sealing performance at the small-diameter opening 150 is lowered, and the problem that earth and sand and dust enter the dust cover 600 from the outside is caused.

特に、低温雰囲気下では弾性材製ダストカバー600を構成するゴムが伸縮性を失い、ボールジョイントの揺動運動に対する膜部の追随性が低下する結果、シールリップが軸400から離れる口開き現象が顕著に発生する事が判った。   In particular, the rubber constituting the dust cover 600 made of an elastic material loses stretchability in a low temperature atmosphere, and the followability of the film portion with respect to the swinging motion of the ball joint is reduced. It was found that it occurred remarkably.

また、この様な口開き現象が発生すると、外部から土砂や塵芥がダストカバー600内に浸入するだけでなく、ダストカバー600内に封入されたグリースが漏れ出る危険性を招来した。   In addition, when such a mouth opening phenomenon occurs, not only earth and sand and dust enter the dust cover 600 from the outside, but also there is a risk that the grease enclosed in the dust cover 600 leaks out.

この様な口開き現象を低減する方策として、シールリップの外周側にコイルスプリング状のバネ手段を埋設して、ボールスタッドの揺動運動に対するシール性の向上を図ったボールジョイント用ダストカバーが提案されたが、対策として十分ではなかった。(特許文献2)   As a measure to reduce such a mouth opening phenomenon, a ball joint dust cover has been proposed in which coil spring-like spring means is embedded on the outer periphery of the seal lip to improve the sealing performance against the swinging motion of the ball stud. However, it was not enough as a countermeasure. (Patent Document 2)

特開昭62−137408号公報JP 62-137408 A 特開2011−85257号公報JP 2011-85257 A

本発明は、このような課題に鑑みてなされたものであり、低温雰囲気下においても、小径開口部と軸との接触が外れる、いわゆる小径開口部の口開き現象の発生を抑えると共に、小径開口部のシール性能が良好なボールジョイント用ダストカバーを提供することを目的とする。   The present invention has been made in view of such a problem, and even in a low-temperature atmosphere, the contact between the small-diameter opening and the shaft is released, and the occurrence of the so-called opening phenomenon of the small-diameter opening is suppressed, and the small-diameter opening An object of the present invention is to provide a dust cover for a ball joint having a good seal performance at a part.

本発明のボールジョイント用ダストカバーは、ボールスタッドの一端に形成された球頭部がソケット内に保持され、前記ボールスタッドの他端の軸はナックルに締め付け固定されている。
そして、一端大径開口部が、前記ソケットの外周面に固定保持され、他端小径開口部が、硬質材製の補強環を備えると共に、前記軸と密封摺動するシールリップを形成した基本構成を備えている。
更に、前記補強環の内周面と前記シールリップの外周側との間に環状溝部を形成している。
そして、前記補強環の内周面に固定保持される円筒部と、前記円筒部の軸方向一端から折り返す形で前記円筒部の内周面側に存在して、前記シールリップを前記軸の外周面側に押圧する円周上等配のスリットを形成したバネ部とより成る金属バネ環を前記環状溝部内に配置した特徴的構成としている。
In the dust cover for a ball joint according to the present invention, a ball head formed at one end of the ball stud is held in a socket, and the shaft at the other end of the ball stud is fastened and fixed to a knuckle.
And the basic structure which one end large diameter opening part was fixedly hold | maintained at the outer peripheral surface of the said socket, and the other end small diameter opening part provided the sealing ring which carried out sealing sliding with the said shaft while being provided with the reinforcing ring made from a hard material. It has.
Furthermore, an annular groove is formed between the inner peripheral surface of the reinforcing ring and the outer peripheral side of the seal lip.
A cylindrical portion fixedly held on the inner peripheral surface of the reinforcing ring; and the seal lip is disposed on the inner peripheral surface side of the cylindrical portion so as to be folded back from one axial end of the cylindrical portion. A metal spring ring composed of a spring portion formed with equally spaced slits pressed on the surface side is arranged in the annular groove portion.

本発明は、以下に記載されるような効果を奏する。
請求項1記載の発明のボールジョイント用ダストカバーによれば、補強環の内周面とシールリップの外周側との間に環状溝部を形成し、この補強環の内周面に固定保持される円筒部と、この円筒部の軸方向一端から折り返す形で円筒部の内周面側に存在して、シールリップを軸の外周面側に押圧する円周上等配のスリットを形成したバネ部とより成る金属バネ環を環状溝部内に配置している為、低温雰囲気下においても、他端小径開口部と軸の接触が外れる、いわゆる他端小径開口部の口開き現象の発生を抑えると共に、他端小径開口部のシール性能を良好に維持出来る。
更に、請求項2記載の発明のボールジョイント用ダストカバーによれば、金属バネ環の円筒部が、環状溝部の開口側に向かって狭まる形に形成された補強環の内周面に固定保持され構成としている為、金属バネ環が環状溝部から脱落することをより確実に防げる為、他端小径開口部の口開き現象の発生を抑えると共に、他端小径開口部のシール性能を良好に維持出来る。
The present invention has the following effects.
According to the dust cover for a ball joint of the first aspect of the present invention, the annular groove is formed between the inner peripheral surface of the reinforcing ring and the outer peripheral side of the seal lip, and is fixedly held on the inner peripheral surface of the reinforcing ring. A cylindrical portion and a spring portion formed on the inner peripheral surface side of the cylindrical portion in a shape folded from one end in the axial direction of the cylindrical portion, and formed with equally spaced slits on the circumference that press the seal lip to the outer peripheral surface side of the shaft Since the metal spring ring composed of the above is arranged in the annular groove portion, the contact between the small diameter opening at the other end and the shaft is disconnected even in a low temperature atmosphere, and the occurrence of the so-called opening phenomenon at the small diameter opening at the other end is suppressed. The sealing performance of the small diameter opening at the other end can be maintained satisfactorily.
Furthermore, according to the dust cover for a ball joint of the invention described in claim 2, the cylindrical portion of the metal spring ring is fixedly held on the inner peripheral surface of the reinforcing ring formed so as to narrow toward the opening side of the annular groove portion. Since it is configured, the metal spring ring can be more reliably prevented from falling off from the annular groove, so that the occurrence of opening of the small diameter opening at the other end can be suppressed, and the sealing performance of the small diameter opening at the other end can be maintained well. .

更に、請求項3記載の発明のボールジョイント用ダストカバーによれば、金属バネ環の円筒部と補強環の内周面の間で凹凸係合している構成としている為、金属バネ環が環状溝部から脱落することをより確実に防げる為、他端小径開口部の口開き現象の発生を抑えると共に、他端小径開口部のシール性能を良好に維持出来る。
更に、請求項4記載の発明のボールジョイント用ダストカバーによれば、環状溝部が、ダストカバーの内部側に開口している為、環状溝部内に土砂等が入り込む事が無い為、金属バネ環の性能を長期に渡って安定して維持出来る。
Furthermore, according to the dust cover for a ball joint of the invention described in claim 3, since the concave and convex engagement is made between the cylindrical portion of the metal spring ring and the inner peripheral surface of the reinforcing ring, the metal spring ring is annular. In order to more reliably prevent the groove portion from falling off, it is possible to suppress the occurrence of a mouth opening phenomenon at the other end small-diameter opening and to maintain the sealing performance of the other end small-diameter opening well.
Furthermore, according to the dust cover for a ball joint of the invention as set forth in claim 4, since the annular groove portion is opened on the inner side of the dust cover, earth and sand do not enter the annular groove portion. Can be stably maintained over a long period of time.

本発明に係るボールジョイント用ダストカバーの縦断面図。The longitudinal section of the dust cover for ball joints concerning the present invention. 図1に示したダストカバーの装着前の縦断面図。The longitudinal cross-sectional view before mounting | wearing with the dust cover shown in FIG. 図2の部分拡大図。The elements on larger scale of FIG. 図1に使用した金属バネ環の平面図。The top view of the metal spring ring used for FIG. 図4のA−A断面図。AA sectional drawing of FIG. 図2に示したダストカバーに金属バネ環の装着前の状態を示した縦断面図。The longitudinal cross-sectional view which showed the state before mounting | wearing with the metal spring ring to the dust cover shown in FIG. 図2に使用した金属バネ環を補強環に固定する他の方法を説明する部分縦断面図。The fragmentary longitudinal cross-section explaining the other method of fixing the metal spring ring used for FIG. 2 to a reinforcement ring. 図2に使用した金属バネ環を補強環に固定する更なる他の方法を説明する部分縦断面図。The fragmentary longitudinal cross-section explaining the further another method of fixing the metal spring ring used for FIG. 2 to a reinforcement ring. 金属バネ環の他の形状を説明する部分縦断面図。The fragmentary longitudinal cross-sectional view explaining the other shape of a metal spring ring. 図2に示した補強環の他の形状を示した部分縦断面図。The fragmentary longitudinal cross-section which showed the other shape of the reinforcement ring shown in FIG. 図2に示した補強環の更なる他の形状を示した部分縦断面図。The fragmentary longitudinal cross-section which showed the further another shape of the reinforcement ring shown in FIG. 従来技術に係るボールジョイント用ダストカバーの縦断面図。The longitudinal cross-sectional view of the dust cover for ball joints based on a prior art.

以下、本発明を実施するための態様について説明する。
図1、図2、図3、図4及び図5に示される様に、本発明に係るボールジョイント用ダストカバー6は、ボールスタッド1の一端に形成された球頭部2がソケット3内に保持され、このボールスタッド1の他端の軸4はナックル5に締め付け固定され、一端大径開口部8が、ソケット3の外周面に固定保持され、他端小径開口部7が、硬質材製の補強環9を備えると共に、軸4と密封摺動するシールリップ71を形成した基本構成を備えている。
Hereinafter, embodiments for carrying out the present invention will be described.
As shown in FIGS. 1, 2, 3, 4, and 5, the ball joint dust cover 6 according to the present invention has a ball head 2 formed at one end of a ball stud 1 in a socket 3. The shaft 4 at the other end of the ball stud 1 is fastened and fixed to the knuckle 5, the one end large diameter opening 8 is fixedly held on the outer peripheral surface of the socket 3, and the other end small diameter opening 7 is made of a hard material. And a basic structure in which a seal lip 71 that slides in a sealed manner with the shaft 4 is provided.

そして、図3に明示する様に、この補強環9の内周面91とシールリップ71の外周側711との間には、環状溝部72が形成されている。
更に、この環状溝部72内には、補強環9の内周面91に嵌合固定される円筒部731と、この円筒部731の軸方向一端からU字形状に折り返す形で円筒部731の内周面側に存在して、シールリップ71を軸4の外周面側に押圧するバネ部733を備えた金属バネ環73が配置されている。
As clearly shown in FIG. 3, an annular groove 72 is formed between the inner peripheral surface 91 of the reinforcing ring 9 and the outer peripheral side 711 of the seal lip 71.
Further, in the annular groove portion 72, a cylindrical portion 731 fitted and fixed to the inner peripheral surface 91 of the reinforcing ring 9 and an inner portion of the cylindrical portion 731 in a shape of being folded back into a U shape from one axial end of the cylindrical portion 731. A metal spring ring 73 provided with a spring portion 733 that is present on the peripheral surface side and presses the seal lip 71 toward the outer peripheral surface side of the shaft 4 is disposed.

また、図4及び図5に示す様に、この金属バネ環73のバネ部733には、円周上等配の複数個のスリット732が形成されている。
このスリット732の存在により、バネ部733がバネ作用を発揮して、シールリップ71を軸4の外周面側に弾性的に強く押圧することが出来る。
As shown in FIGS. 4 and 5, the spring portion 733 of the metal spring ring 73 is formed with a plurality of equally spaced slits 732 on the circumference.
Due to the presence of the slit 732, the spring portion 733 exerts a spring action, and the seal lip 71 can be elastically and strongly pressed against the outer peripheral surface side of the shaft 4.

本発明に係るボールジョイント用ダストカバー6は、上述した構成としている為、低温雰囲気下においても、他端小径開口部7と軸4の接触が外れる、いわゆる他端小径開口部7の口開き現象の発生を抑えると共に、他端小径開口部7のシール性能を良好に維持出来る。   Since the ball joint dust cover 6 according to the present invention has the above-described configuration, the contact between the other end small-diameter opening 7 and the shaft 4 is disengaged even in a low-temperature atmosphere. Generation | occurrence | production, and the sealing performance of the other end small diameter opening part 7 can be maintained favorable.

また、金属バネ環73のダストカバー6への装着は、図6に示す様に、補強環9の内周面91とシールリップ71の外周側711との間に環状溝部72を形成したダストカバー6と金属バネ環73を別工程で作成しておいた後、金属バネ環73を環状溝部72内に嵌合固定することにより行われる。   Further, the metal spring ring 73 is attached to the dust cover 6 as shown in FIG. 6 in which a dust cover in which an annular groove 72 is formed between the inner peripheral surface 91 of the reinforcing ring 9 and the outer peripheral side 711 of the seal lip 71. 6 and the metal spring ring 73 are prepared in separate steps, and then the metal spring ring 73 is fitted and fixed in the annular groove 72.

この方法は、補強環9の円筒形状の内周面91に、金属バネ環73の円筒部731を一定の嵌合代を与えて嵌合固定しているが、より強固に嵌合固定する方法としては、図7及び図8に示す方法が有る。   In this method, the cylindrical portion 731 of the metal spring ring 73 is fitted and fixed to the cylindrical inner peripheral surface 91 of the reinforcing ring 9 by giving a fixed fitting allowance. There is a method shown in FIG. 7 and FIG.

すなわち、図7に示す方法は、補強環9の内周面91が、環状溝部72の開口側(図上上側)に向かって狭まる形に形成されていて、この傾斜角度αのテーパー状の内周面91に金属バネ環73の円筒部731が固定保持されている為、金属バネ環73が環状溝部72から脱落することをより確実に防げる為、他端小径開口部7の口開き現象の発生を抑えると共に、他端小径開口部7のシール性能を良好に維持出来る。   That is, in the method shown in FIG. 7, the inner peripheral surface 91 of the reinforcing ring 9 is formed so as to narrow toward the opening side (upper side in the figure) of the annular groove 72, and the tapered inner surface with the inclination angle α is formed. Since the cylindrical portion 731 of the metal spring ring 73 is fixed and held on the peripheral surface 91, the metal spring ring 73 can be more reliably prevented from falling off the annular groove portion 72. While suppressing generation | occurrence | production, the sealing performance of the other end small diameter opening part 7 can be maintained favorable.

また、図8に示す方法は、金属バネ環73の円筒部731と補強環9の内周面91の間で、凹凸係合部734により係合させている為、金属バネ環73が環状溝部72から脱落することをより確実に防げる為、他端小径開口部7の口開き現象の発生を抑えると共に、他端小径開口部7のシール性能を良好に維持出来る。   Further, in the method shown in FIG. 8, the metal spring ring 73 is engaged with the concave / convex engaging portion 734 between the cylindrical portion 731 of the metal spring ring 73 and the inner peripheral surface 91 of the reinforcing ring 9. Therefore, it is possible to prevent the opening of the other end small-diameter opening 7 from occurring and to maintain the sealing performance of the other end small-diameter opening 7 satisfactorily.

金属バネ環73の形状は、断面がU字形状に限らず、図9の(a)に示す様な略D字形状や、図9の(b)に示す様な略く字形状や、図9の(c)に示す様な略V字形状等様々な形状のものが採用可能である。   The shape of the metal spring ring 73 is not limited to a U-shaped cross section, and is substantially D-shaped as shown in FIG. 9A, substantially rectangular as shown in FIG. Various shapes such as a substantially V shape as shown in 9 (c) can be adopted.

また、補強環9の形状も、断面がL字形状に限らず、図10に示す様に、略Z字形状にしても良い。   Further, the shape of the reinforcing ring 9 is not limited to an L shape in cross section, and may be a substantially Z shape as shown in FIG.

更に、図11に示す様に、補強環9の形状を、断面が逆L字形状にして、環状溝部72が、ダストカバー6の内部側(図上下方)に開口している形としても良い。
この様な形とする事により、環状溝部72内に土砂等が入り込む事が無い為、金属バネ環73の性能を長期に渡って安定して維持出来る。
Furthermore, as shown in FIG. 11, the reinforcing ring 9 may have an inverted L-shaped cross section so that the annular groove 72 is open to the inside (downward in the figure) of the dust cover 6. .
By adopting such a shape, earth and sand do not enter the annular groove 72, so that the performance of the metal spring ring 73 can be stably maintained over a long period of time.

また、補強環9の材質としては、金属材、樹脂材が適宜選択して用いられる。   Moreover, as a material of the reinforcing ring 9, a metal material and a resin material are appropriately selected and used.

また、ダストカバー6の材質は、クロロプレン等のゴム状弾性材や、ポリエステル系エラストマー、熱可塑性ポリウレタン等の熱可塑性エラストマーから、適宜用途に合わせ選択して使用される。   The material of the dust cover 6 is appropriately selected from a rubber-like elastic material such as chloroprene and a thermoplastic elastomer such as a polyester-based elastomer and a thermoplastic polyurethane.

また、ダストカバー6内には、グリースが封入されている。   The dust cover 6 is filled with grease.

一方、ダストカバー6の断面略コ字形状の一端大径開口部8は、ソケット3の外周面に形成された環状のソケット溝部31内に、円環状押さえリング11により固定保持される構成となっている。
この押さえリング11は、断面略矩形状のサークリップを使用したが、一端大径開口部8に金属補強環を埋設一体化したタイプ等用途に応じ各種押えリングが採用される。
また、他端小径開口部7のナックル5と接する端面には、ダストリップ74を形成している。
On the other hand, one end large-diameter opening 8 having a substantially U-shaped cross section of the dust cover 6 is fixed and held by an annular pressing ring 11 in an annular socket groove 31 formed on the outer peripheral surface of the socket 3. ing.
Although the circlip having a substantially rectangular cross section is used as the pressing ring 11, various pressing rings are used depending on applications such as a type in which a metal reinforcing ring is embedded and integrated in the large-diameter opening 8 at one end.
A dust lip 74 is formed on an end surface of the other end small diameter opening 7 in contact with the knuckle 5.

また、本発明は上述の発明を実施するための最良の形態に限らず本発明の要旨を逸脱することなくその他種々の構成を採り得ることはもちろんである。   Further, 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.

自動車の懸架装置及び操舵装置等に使用されるボールジョイントに使用できる。   It can be used for ball joints used in automobile suspension systems and steering systems.

1 ボールスタッド
2 球頭部
3 ソケット
4 軸
5 ナックル
6 ダストカバー
7 他端小径開口部
8 一端大径開口部
9 補強環
11 押えリング
31 ソケット溝部
71 シールリップ
72 環状溝部
73 金属バネ環
74 ダストリップ
91 内周面
711外周側
731円筒部
732スリット
733バネ部
734凹凸係合部
1 Ball stud 2 Ball head 3 Socket 4 Shaft 5 Knuckle 6 Dust cover 7 Other end small diameter opening 8 One end large diameter opening 9 Reinforcement ring 11 Press ring 31 Socket groove 71 Seal lip 72 Annular groove 73 Metal spring ring 74 Dustrip 91 inner peripheral surface 711 outer peripheral side 731 cylindrical portion 732 slit 733 spring portion 734 uneven engagement portion

Claims (4)

  1. ボールスタッド(1)の一端に形成された球頭部(2)がソケット(3)内に保持され、前記ボールスタッド(1)の他端の軸(4)はナックル(5)に締め付け固定され、一端大径開口部(8)が、前記ソケット(3)の外周面に固定保持され、他端小径開口部(7)が、硬質材製の補強環(9)を備えると共に、前記軸(4)と密封摺動するシールリップ(71)を形成したボールジョイント用ダストカバー(6)において、
    前記補強環(9)の内周面(91)と前記シールリップ(71)の外周側(711)との間に環状溝部(72)を形成し、前記補強環(9)の内周面(91)に固定保持される円筒部(731)と、前記円筒部(731)の軸方向一端から折り返す形で前記円筒部(731)の内周面側に存在して、前記シールリップ(71)を前記軸(4)の外周面側に押圧する円周上等配のスリット(732)を形成したバネ部(733)とより成る金属バネ環(73)を前記環状溝部(72)内に配置したことを特徴とするボールジョイント用ダストカバー。
    The ball head (2) formed at one end of the ball stud (1) is held in the socket (3), and the shaft (4) at the other end of the ball stud (1) is fastened and fixed to the knuckle (5). The large-diameter opening (8) at one end is fixedly held on the outer peripheral surface of the socket (3), and the small-diameter opening (7) at the other end is provided with a reinforcing ring (9) made of a hard material, and the shaft ( 4) In the dust cover (6) for the ball joint formed with the seal lip (71) sliding and sealingly,
    An annular groove (72) is formed between the inner peripheral surface (91) of the reinforcing ring (9) and the outer peripheral side (711) of the seal lip (71), and the inner peripheral surface of the reinforcing ring (9) ( 91) and a cylindrical portion (731) fixedly held on the inner peripheral surface side of the cylindrical portion (731) so as to be folded back from one axial end of the cylindrical portion (731), and the seal lip (71) A metal spring ring (73) including a spring portion (733) formed with circumferentially spaced slits (732) that press the shaft toward the outer peripheral surface side of the shaft (4) is disposed in the annular groove portion (72). Dust cover for ball joints.
  2. 前記金属バネ環(73)の前記円筒部(731)が、前記環状溝部(72)の開口側に向かって狭まる形に形成された前記補強環(9)の内周面(91)に固定保持されている
    ことを特徴とする請求項1記載のボールジョイント用ダストカバー。
    The cylindrical portion (731) of the metal spring ring (73) is fixedly held on the inner peripheral surface (91) of the reinforcing ring (9) formed so as to narrow toward the opening side of the annular groove portion (72). The dust cover for a ball joint according to claim 1, wherein the dust cover is a dust cover.
  3. 前記金属バネ環(73)の前記円筒部(731)と前記補強環(9)の内周面(91)の間で凹凸係合していることを特徴とする請求項1記載のボールジョイント用ダストカバー。   2. The ball joint according to claim 1, wherein a concave and convex engagement is made between the cylindrical portion (731) of the metal spring ring (73) and the inner peripheral surface (91) of the reinforcing ring (9). Dust cover.
  4. 前記環状溝部(72)が、前記ダストカバー(6)の内部側に開口していることを特徴とする請求項1または2記載のボールジョイント用ダストカバー。   The dust cover for a ball joint according to claim 1 or 2, wherein the annular groove portion (72) is open to the inside of the dust cover (6).
JP2015542078A 2014-06-06 2015-04-20 Dust cover for ball joint Active JP5839314B1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2014117486 2014-06-06
JP2014117486 2014-06-06
JP2015542078A JP5839314B1 (ja) 2014-06-06 2015-04-20 Dust cover for ball joint
PCT/JP2015/061926 WO2015186441A1 (ja) 2014-06-06 2015-04-20 ボールジョイント用ダストカバー

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10527088B2 (en) * 2014-08-21 2020-01-07 Nok Corporation Dust cover
WO2016063832A1 (ja) * 2014-10-22 2016-04-28 Nok株式会社 ダストカバー
WO2017061212A1 (ja) * 2015-10-05 2017-04-13 Nok株式会社 ダストカバー
JPWO2017154672A1 (ja) * 2016-03-10 2018-12-27 Nok株式会社 ダストカバー及び密封構造
DE102018000128A1 (de) * 2018-01-10 2019-07-11 Carl Freudenberg Kg Dichtungsbalg

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Publication number Priority date Publication date Assignee Title
US3279833A (en) * 1964-03-20 1966-10-18 Ford Motor Co Ball joint and seal assembly
JPS5349658A (en) * 1976-10-15 1978-05-06 Nippon Oil Seal Ind Co Ltd Ball joint seal
US4322175A (en) * 1980-05-12 1982-03-30 Trw Inc. Joint assembly
US4508356A (en) * 1984-06-06 1985-04-02 Robert Janian Modified C-shaped mechanical spring seal
JPH10159988A (ja) * 1996-11-29 1998-06-16 Musashi Seimitsu Ind Co Ltd Dust cover
US6502831B2 (en) * 2001-01-29 2003-01-07 Trw Inc. Ball joint with seal
DE10124295C5 (de) * 2001-05-17 2008-09-04 ZF Lemförder GmbH Kugelgelenk
US6834863B2 (en) * 2002-05-28 2004-12-28 Trw Inc. Ball joint seal
DE102004018054B4 (de) * 2004-04-08 2006-10-05 Zf Friedrichshafen Ag Dichtungsbalg
JP2011085257A (ja) * 2009-09-15 2011-04-28 Nok Corp ボールジョイント用ダストカバー
CN202811810U (zh) * 2012-09-26 2013-03-20 河北长安汽车有限公司 汽车前轴摆臂球头销结构

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JP5839314B1 (ja) 2016-01-06
US20170159701A1 (en) 2017-06-08
EP3153726A1 (en) 2017-04-12
WO2015186441A1 (ja) 2015-12-10
CN106460915A (zh) 2017-02-22

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