JP3570636B2 - Sliding bush - Google Patents

Sliding bush Download PDF

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Publication number
JP3570636B2
JP3570636B2 JP06664094A JP6664094A JP3570636B2 JP 3570636 B2 JP3570636 B2 JP 3570636B2 JP 06664094 A JP06664094 A JP 06664094A JP 6664094 A JP6664094 A JP 6664094A JP 3570636 B2 JP3570636 B2 JP 3570636B2
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JP
Japan
Prior art keywords
inner cylinder
elastic body
sliding
seal cover
outer periphery
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Fee Related
Application number
JP06664094A
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Japanese (ja)
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JPH07248037A (en
Inventor
雅明 鈴木
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yamashita Rubber Co Ltd
Original Assignee
Yamashita Rubber Co Ltd
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 Yamashita Rubber Co Ltd filed Critical Yamashita Rubber Co Ltd
Priority to JP06664094A priority Critical patent/JP3570636B2/en
Publication of JPH07248037A publication Critical patent/JPH07248037A/en
Application granted granted Critical
Publication of JP3570636B2 publication Critical patent/JP3570636B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Springs (AREA)
  • Support Of The Bearing (AREA)
  • Vibration Prevention Devices (AREA)

Description

【0001】
【産業上の利用分野】
この発明は、ねじれや、場合によりこじれ等が作用する場所に使用する摺動ブッシュに関する。
【0002】
【従来の技術】
車両のサスペンション等、ねじれや、場合によりこじれ等が作用する場所に使用する摺動ブッシュは公知であり、このようなものの一例として、特開昭61−287807号がある。このものは、中間部外周に部分的な大径部をなす球状凸部を設けた内筒と、この周囲に同心状に設けられる筒状の部材であって、内周面の凸部と対応する部分に球状凹部を形成したカラーと、これら球状の凸部と凹部とで形成される空間内に注入された樹脂からなる樹脂ベアリング部と、カラーの周囲に設けられた弾性体とを備え、ねじれとこじれの両方に対応できるようになっている。
【0003】
【発明が解決しようとする課題】
ところで上記公知例の場合、摺動面をチリ及び埃など(以下、埃などという)の侵入から保護するため、カラーと内筒の間を覆うシールカバーを別体で一対形成し、これを内筒の軸方向両端側からカラーの内周へ嵌合取付する必要があり、部品点数及び取付工数の増加、並びに使用中の脱落を防止するための保守等が必要になるという問題があった。そこで本願はこのような問題点の解決を目的にする。
【0004】
【上記課題を解決するための手段】
上記課題を解決するため本願に係る摺動ブッシュは、内筒と、この周囲に同心状に設けられる弾性体と、この弾性体と内筒との間に直接又は他部材を介して設けられる樹脂ベアリング部とを備えた摺動ブッシュにおいて、弾性体の一部から内筒の軸方向へ延出し、内筒の周囲を覆うシールカバーを弾性体と一体に形成するとともに、内筒の外周で前記弾性体及びシールカバーで覆われる部分に環状の凹溝からなる摺動溝を形成し、この摺動溝内に樹脂ベアリングを充填し、樹脂ベアリングと摺動溝の間を摺動面とし、かつ樹脂ベアリングの外周を弾性体と一体にしたことを特徴とする。
【0005】
このとき、摺動面の形成に関しては、内筒の外周で前記弾性体及びシールカバーで覆われる部分に環状の凹溝からなる摺動溝を形成し、この摺動溝内に樹脂ベアリングを充填し、樹脂ベアリングと摺動溝の間を摺動面とし、かつ樹脂ベアリングの外周を弾性体と一体にする
【0006】
さらに、シールカバーの延出端を内筒の外周に形成した環状のシール溝内へ嵌合するようにしてもよい。
【0007】
また、摺動ブッシュの形式としては、軸回りのねじれだけを行う形式のもの、並びにこじれに加えて、内筒と弾性体が軸方向へ相対的に傾くこじれを行う形式のいずれであってもよい。
【0008】
【作用】
シールカバーが弾性体から一体に内筒の軸方向へ延出し、かつ内筒の外周を覆うので、この部分で摺動面を埃などの侵入から保護する。
【0010】
のシール構造が設けられる摺動ブッシュの摺動面は、内筒の外周に環状の凹溝からなる摺動溝を形成し、この摺動溝内に樹脂ベアリングを充填し、かつ樹脂ベアリングの外周を弾性体と一体にすれば、摺動溝とこの中に嵌合している樹脂ベアリングの間が摺動面になる。
【0011】
このとき、シールカバーの延出端を内筒の外周に形成した環状のシール溝内へ嵌合することにより、 シールがいっそう確実になる。
【0012】
【発明の効果】
本願の摺動ブッシュは、シールカバーが弾性体から一体に内筒の軸方向へ延出し、かつ内筒の外周を覆うので、この部分で摺動面を埃などの侵入から保護することができるとともに、このシールカバーが弾性体と一体に形成されるため、内筒と弾性体を組み立てれば同時にシールカバーで内筒を覆うことができる。このため、部品点数及び取付工数を削減でき、しかも使用中の脱落がなくなるのでこのための保守が不要になる。
【0013】
さらに、内筒の外周で前記弾性体及びシールカバーで覆われる部分に環状の凹溝からなる摺動溝を形成し、この摺動溝内に樹脂ベアリングを充填し、かつ樹脂ベアリングの外周を弾性体と一体にすれば、樹脂ベアリングの内周側を摺動面にした摺動ブッシュに、これらのシール構造を使用できる。
【0014】
このとき、シールカバーの延出端を内筒の外周に形成した環状のシール溝内へ嵌合することにより、 シールがいっそう確実になる。
【0015】
【実施例】
図1乃至図2に基づいて、自動車のサスペンションアーム用に形成された摺動ブッシュの第1実施例を説明する。図2は本実施例の軸方向断面を示し、図1はそのA部についての拡大図である。
【0016】
これらの図において明らかなように、摺動ブッシュは、内筒1、これと同心でその周囲へ嵌合されている弾性体2、この弾性体2と内筒1との間に設けられる樹脂ベアリング部3、弾性体2が嵌合された外筒4を備え、内筒の両端は弾性体2及び外筒4よりも長く両側へ突出する突出部5となっている。
【0017】
この弾性体2の両側部からはシールカバー6が内筒1の端部方向へ延出し、突出部5の周囲を覆っている。シールカバー6は弾性体4の成形と同時にその材料の一部を用いて一体に形成され、その先端側が突出部5の周囲へ密接するように略筒状をなしている。
【0018】
樹脂ベアリング3は潤滑性のある公知の適宜樹脂を、内筒1の外周に形成された環状の凹溝からなる摺動溝7内に充填することにより形成され、その内周面及び軸方向両端面で、摺動溝7内を摺動自在になっている。但し、軸方向への移動が制限されるため、ねじれ方向だけに対応する形式になっている。
【0019】
弾性体2は、ゴム又は適当なエラストマー等からなる公知の部材であり、予め樹脂ベアリング3が形成された内筒の周囲へ直接成形する。このとき弾性体2の内周面は樹脂ベアリング3の外周面と接着一体化し、かつシールカバー6も突出部5へ接着する。
【0020】
但し、予め弾性体2をシールカバー6と一体に成形しておき、その後、内側に設けた貫通穴内へ、樹脂ベアリング3が設けられ、かつ外周面に接着剤が塗布された内筒1を嵌合してもよい。なお、シールカバー6と突出部5の間は必ずしも接着する必要がなく、両者間を滑り可能にしておくこともできる。
【0021】
外筒4は内側へ弾性体2を一体に成形するか又は予め成形された弾性体2を嵌合するための円筒状をなす金属部材であり、図示しない車体側などの被取付部材に予め設けられている取付穴へ嵌合されるようになっている。但し、外筒4は必ずしも必要ではなく、取付相手に外筒4を代用できる構造が設けられていれば省略できる。
【0022】
本実施例によれば、シールカバー6が突出部5に密接しているので、外部から摺動面へ埃などが侵入することを阻止でき、摺動面が損傷しないように保護し、良好な摺動性を維持することができる。このとき、シールカバー6が突出部5と接着していなければ、摺動ブッシュがねじれたときシールカバー6と突出部5が相対移動するが、シールカバー6が突出部5に接着していても、摺動ブッシュがねじれたときはシールカバー6自体の弾性で追従変形が自在になるとともに、シール性が一層高まる。
【0023】
しかも、弾性体2の成形と同時にシールカバー6を一体成形できるので、従来後工程で取付けていた別体のシールカバーを省略できる。このため、部品点数及び取付工数を削減でき、しかも使用中の脱落がなくなるのでこのための保守が不要になる。
【0024】
図3は第2実施例に関する図1と同様の図である。なお前実施例と共通機能部分には同一符号を付すものとする(後述の第3実施例も同様)。
【0025】
この実施例では、シールカバー6の延出端8を玉縁状に肥大させ、かつこの部分を予め内筒1の外周面全周に形成した環状のシール溝9内へ嵌合してある。このようにすると、延出端8並びにシールカバー6自体の2段階にシールされるので、シールがいっそう確実になり、そのうえシールカバー6を突出部5と接着させないでも十分なシールカバー性が得られる。
【0031】
なお、本発明はこれらの実施例に限定されず種々に変形や応用が可能であり、例えば、第1及び第2実施例の弾性体2は必ずしも内筒1の外周へ直接形成されることなく、カラーを介してもよい。このとき摺動面を曲面にせず、第1実施例のような直線状にすれば、ねじれ専用にできる。さらに、樹脂ベアリングを、内筒の外周に形成された大径部と、弾性体の内周側に設けられたカラーに形成された前記大径部に対応する摺動溝の間に形成するとともに、第2実施例の延出部8を適用することも当然可能になる。
【図面の簡単な説明】
【図1】第1実施例に係る摺動ブッシュの要部拡大断面図
【図2】第1実施例に係る摺動ブッシュの全体断面図
【図3】第2実施例に係る摺動ブッシュの図2に相当する要部拡大断面図
[0001]
[Industrial applications]
The present invention relates to a sliding bush used in a place where torsion and possibly twisting act.
[0002]
[Prior art]
2. Description of the Related Art A sliding bush used in a place such as a vehicle suspension where a torsion or, in some cases, a torsion acts is known, and one example of such a sliding bush is disclosed in Japanese Patent Application Laid-Open No. 61-287807. This is an inner cylinder provided with a spherical convex part which forms a partial large diameter part on the outer periphery of the intermediate part, and a cylindrical member provided concentrically around the inner cylindrical part, corresponding to the convex part on the inner peripheral surface. A collar having a spherical concave portion formed in a portion to be formed, a resin bearing portion made of resin injected into a space formed by the spherical convex portion and the concave portion, and an elastic body provided around the collar, It can handle both twisting and twisting.
[0003]
[Problems to be solved by the invention]
By the way, in the case of the above-mentioned known example, in order to protect the sliding surface from dust and dirt and the like (hereinafter referred to as dirt and the like), a pair of seal covers for covering between the collar and the inner cylinder are separately formed, and this is formed. It is necessary to fit and attach to the inner periphery of the collar from both ends in the axial direction of the cylinder, and there is a problem that the number of parts and the number of mounting steps are increased, and maintenance or the like for preventing falling off during use is required. Then, this application aims at solving such a problem.
[0004]
[Means for Solving the Problems]
In order to solve the above problems, a sliding bush according to the present application includes an inner cylinder, an elastic body provided concentrically around the inner cylinder, and a resin provided directly or via another member between the elastic body and the inner cylinder. In a sliding bush provided with a bearing portion, a seal cover extending from a part of the elastic body in the axial direction of the inner cylinder and covering the periphery of the inner cylinder is formed integrally with the elastic body, and the seal cover is formed on the outer periphery of the inner cylinder. A sliding groove formed of an annular concave groove is formed in a portion covered by the elastic body and the seal cover, and a resin bearing is filled in the sliding groove, a sliding surface is provided between the resin bearing and the sliding groove, and The outer periphery of the resin bearing is integrated with the elastic body .
[0005]
At this time, regarding the formation of the sliding surface , a sliding groove composed of an annular concave groove is formed in a portion covered by the elastic body and the seal cover on the outer periphery of the inner cylinder, and a resin bearing is filled in the sliding groove. The sliding surface is formed between the resin bearing and the sliding groove, and the outer periphery of the resin bearing is integrated with the elastic body .
[0006]
Further, the extension end of the seal cover may be fitted into an annular seal groove formed on the outer periphery of the inner cylinder .
[0007]
Further, as the type of the sliding bush, any of a type in which only the twist around the axis is performed, and a type in which the inner cylinder and the elastic body are relatively tilted in the axial direction in addition to the twist, may be used. Good.
[0008]
[Action]
Since the seal cover integrally extends from the elastic body in the axial direction of the inner cylinder and covers the outer periphery of the inner cylinder, the sliding surface is protected from intrusion of dust and the like at this portion.
[0010]
Sliding surface of the sliding bush sheet Lumpur structure of this is provided, to form a slide groove formed of an annular groove on the outer periphery of the inner cylinder, the resin bearing filled into the sliding groove, and the resin If the outer periphery of the bearing is integrated with the elastic body, a sliding surface is formed between the sliding groove and the resin bearing fitted therein.
[0011]
At this time, by fitting the extension end of the seal cover into an annular seal groove formed on the outer periphery of the inner cylinder, The seal is more secure.
[0012]
【The invention's effect】
In the sliding bush of the present application, since the seal cover integrally extends from the elastic body in the axial direction of the inner cylinder and covers the outer periphery of the inner cylinder, the sliding surface can be protected from intrusion of dust and the like at this portion. In addition, since the seal cover is formed integrally with the elastic body, the inner cylinder can be simultaneously covered with the seal cover by assembling the inner cylinder and the elastic body. For this reason, the number of parts and the number of mounting steps can be reduced, and since there is no dropout during use, maintenance for this is unnecessary.
[0013]
Further, a sliding groove composed of an annular concave groove is formed in a portion of the outer periphery of the inner cylinder which is covered with the elastic body and the seal cover, a resin bearing is filled in the sliding groove, and the outer periphery of the resin bearing is elastically deformed. If integrated with the body, these seal structures can be used for a sliding bush having the inner peripheral side of the resin bearing as a sliding surface.
[0014]
At this time, by fitting the extension end of the seal cover into an annular seal groove formed on the outer periphery of the inner cylinder, The seal is more secure.
[0015]
【Example】
A first embodiment of a sliding bush formed for a suspension arm of an automobile will be described with reference to FIGS. FIG. 2 shows an axial section of the present embodiment, and FIG. 1 is an enlarged view of a portion A thereof.
[0016]
As is apparent from these figures, the sliding bush includes an inner cylinder 1, an elastic body 2 concentrically fitted around the inner cylinder 1, and a resin bearing provided between the elastic body 2 and the inner cylinder 1. The inner cylinder has a protruding portion 5 protruding to both sides longer than the elastic body 2 and the outer cylinder 4.
[0017]
From both sides of the elastic body 2, seal covers 6 extend toward the end of the inner cylinder 1, and cover the periphery of the protrusion 5. The seal cover 6 is integrally formed using a part of the material at the same time as the molding of the elastic body 4, and is formed in a substantially cylindrical shape so that the front end side thereof is in close contact with the periphery of the protrusion 5.
[0018]
The resin bearing 3 is formed by filling a known suitable resin having lubricity into a sliding groove 7 formed of an annular concave groove formed on the outer periphery of the inner cylinder 1, and has an inner peripheral surface and both ends in the axial direction. The surface is slidable in the sliding groove 7. However, since the movement in the axial direction is restricted, the type corresponds to only the twist direction.
[0019]
The elastic body 2 is a known member made of rubber, a suitable elastomer, or the like, and is directly formed around the inner cylinder in which the resin bearing 3 is formed in advance. At this time, the inner peripheral surface of the elastic body 2 is bonded and integrated with the outer peripheral surface of the resin bearing 3, and the seal cover 6 is also adhered to the protruding portion 5.
[0020]
However, the elastic body 2 is molded integrally with the seal cover 6 in advance, and then the inner cylinder 1 in which the resin bearing 3 is provided and the adhesive is applied to the outer peripheral surface is fitted into a through hole provided inside. May be combined. Note that the seal cover 6 and the protruding portion 5 do not necessarily need to be adhered to each other, and may be slidable therebetween.
[0021]
The outer cylinder 4 is a cylindrical metal member into which the elastic body 2 is integrally molded or fitted with the preformed elastic body 2, and is provided in advance on a member to be mounted such as a vehicle body (not shown). It is adapted to be fitted into a mounting hole provided. However, the outer cylinder 4 is not necessarily required, and can be omitted if a structure capable of substituting the outer cylinder 4 is provided for a mounting partner.
[0022]
According to the present embodiment, since the seal cover 6 is in close contact with the protrusion 5, it is possible to prevent dust and the like from entering the sliding surface from the outside, protect the sliding surface from being damaged, and provide a good The slidability can be maintained. At this time, if the seal cover 6 is not bonded to the protrusion 5, the seal cover 6 and the protrusion 5 move relative to each other when the sliding bush is twisted. In addition, when the sliding bush is twisted, the elastic deformation of the seal cover 6 itself enables the following deformation, and the sealing performance is further improved.
[0023]
In addition, since the seal cover 6 can be integrally formed at the same time as the formation of the elastic body 2, a separate seal cover which has been conventionally attached in a later step can be omitted. For this reason, the number of parts and the number of mounting steps can be reduced, and since there is no dropout during use, maintenance for this is unnecessary.
[0024]
FIG. 3 is a view similar to FIG. 1 for the second embodiment. It is to be noted that the same reference numerals are given to the common function portions with the previous embodiment (the same applies to a third embodiment described later).
[0025]
In this embodiment, the extended end 8 of the seal cover 6 is enlarged like a bead, and this portion is fitted into an annular seal groove 9 formed in advance on the entire outer peripheral surface of the inner cylinder 1. In this way, since the sealing is performed in two steps of the extension end 8 and the seal cover 6 itself, the sealing is further ensured, and furthermore, a sufficient seal cover property can be obtained even if the seal cover 6 is not adhered to the protrusion 5. .
[0031]
The present invention is not limited to these embodiments, and various modifications and applications are possible. For example, the elastic body 2 of the first and second embodiments is not necessarily formed directly on the outer periphery of the inner cylinder 1. , it may be via-collar. At this time without sliding sliding surface to a curved surface, if in a linear shape as in the first embodiment, it can be a torsion only. Further, a resin bearing is formed between a large-diameter portion formed on the outer periphery of the inner cylinder and a sliding groove corresponding to the large-diameter portion formed on the collar provided on the inner peripheral side of the elastic body. Of course, it is also possible to apply the extension 8 of the second embodiment.
[Brief description of the drawings]
FIG. 1 is an enlarged sectional view of a main part of a sliding bush according to a first embodiment; FIG. 2 is an overall sectional view of a sliding bush according to a first embodiment; FIG. Main part enlarged sectional view corresponding to FIG.

Claims (2)

内筒と、この周囲に同心状に設けられる弾性体と、この弾性体と内筒との間に直接又は他部材を介して設けられる樹脂ベアリング部とを備えた摺動ブッシュにおいて、弾性体の一部から内筒の軸方向へ延出し、内筒の周囲を覆うシールカバーを弾性体と一体に形成するとともに、内筒の外周で前記弾性体及びシールカバーで覆われる部分に環状の凹溝からなる摺動溝を形成し、この摺動溝内に樹脂ベアリングを充填し、樹脂ベアリングと摺動溝の間を摺動面とし、かつ樹脂ベアリングの外周を弾性体と一体にしたことを特徴とする摺動ブッシュ。In a sliding bush provided with an inner cylinder, an elastic body provided concentrically around the inner cylinder, and a resin bearing portion provided directly or via another member between the elastic body and the inner cylinder, A seal cover extending from the part in the axial direction of the inner cylinder and covering the periphery of the inner cylinder is formed integrally with the elastic body, and an annular groove is formed in a portion of the outer periphery of the inner cylinder covered by the elastic body and the seal cover. The sliding groove consisting of is formed, resin bearing is filled in the sliding groove, the sliding surface is formed between the resin bearing and the sliding groove, and the outer periphery of the resin bearing is integrated with the elastic body. And sliding bush. 前記内筒の端部方向へ延出する前記シールカバーの延出端を内筒の外周に形成した環状のシール溝内へ嵌合したことを特徴とする請求項1の摺動ブッシュ。 The sliding bush according to claim 1, wherein an extension end of the seal cover extending toward an end of the inner cylinder is fitted into an annular seal groove formed on an outer periphery of the inner cylinder .
JP06664094A 1994-03-10 1994-03-10 Sliding bush Expired - Fee Related JP3570636B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP06664094A JP3570636B2 (en) 1994-03-10 1994-03-10 Sliding bush

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP06664094A JP3570636B2 (en) 1994-03-10 1994-03-10 Sliding bush

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Publication Number Publication Date
JPH07248037A JPH07248037A (en) 1995-09-26
JP3570636B2 true JP3570636B2 (en) 2004-09-29

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Publication number Priority date Publication date Assignee Title
FR2881808B1 (en) * 2005-02-07 2007-05-11 Peugeot Citroen Automobiles Sa FIXING BEARING AN ANTI-DEVERS BAR AT THE CHASSIS OF A MOTOR VEHICLE
CN112339872A (en) * 2019-08-08 2021-02-09 博戈橡胶塑料(株洲)有限公司 Connecting bearing between cab and frame

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