JPH03255236A - Sliding type bush assembly - Google Patents
Sliding type bush assemblyInfo
- Publication number
- JPH03255236A JPH03255236A JP5218790A JP5218790A JPH03255236A JP H03255236 A JPH03255236 A JP H03255236A JP 5218790 A JP5218790 A JP 5218790A JP 5218790 A JP5218790 A JP 5218790A JP H03255236 A JPH03255236 A JP H03255236A
- Authority
- JP
- Japan
- Prior art keywords
- sliding
- rigid sleeve
- inner cylinder
- resin
- cylinder member
- 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.)
- Granted
Links
- 239000011347 resin Substances 0.000 claims abstract description 39
- 229920005989 resin Polymers 0.000 claims abstract description 39
- 238000000465 moulding Methods 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 230000002093 peripheral effect Effects 0.000 abstract description 7
- 230000013011 mating Effects 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 description 11
- 239000000463 material Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920006324 polyoxymethylene Polymers 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000013040 rubber vulcanization Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000004705 High-molecular-weight polyethylene Substances 0.000 description 1
- 229930040373 Paraformaldehyde Natural products 0.000 description 1
- 229930182556 Polyacetal Natural products 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- -1 polyoxymethylene Polymers 0.000 description 1
- 239000012791 sliding layer Substances 0.000 description 1
Landscapes
- Vibration Prevention Devices (AREA)
- Springs (AREA)
Abstract
Description
本発明は摺動型ブツシュ組立体に関するもので。
詳しくは車両のサスペンション、例えばダブルウィツシ
ュボーンにおけるアッパーアームと車体との連結部に用
いて好適な摺動型ブツシュ組立体に関するものである。The present invention relates to a sliding bushing assembly. More specifically, the present invention relates to a sliding bushing assembly suitable for use in a vehicle suspension, such as a connection between an upper arm and a vehicle body in a double wishbone.
従来、車両サスペンション等の枢支連結部に使用される
ブツシュ組立体は、一般に同心的に配設される内外二つ
の筒状部材間にゴム材料からなる筒状の弾性部材が介装
された構造であり、その弾性部材のばね特性によって、
主として軸直角方向の振動を吸収するようになっている
。
しかし、このような構造のブツシュ組立体は、軸直角方
向の剛性を上げると捩り剛性が増加するという難点があ
った。このために、上記筒状部材と弾性部材との間に、
この弾性部材による捩り剛性を低減させるための摺動部
材を介在させることが、例えば、英国特許第１０４５８
２７号や米国特許第３３３１６４２号等の明細書によっ
て提案されている。
このように筒状部材と弾性部材との間に摺動部材を介在
させた摺動型ブツシュ組立体は、摺動部材によって筒状
部材と弾性部材間の摩擦抵抗が軽減し、筒状部材と弾性
部材は容易な相互の回転が可能となるから、軸直角方向
の剛性を保持すると共に軸回転方向の捩り剛性を低くす
ることができる。そして従来、この摺動用樹脂材料から
なる円筒状摺動部材は補強と信頼性向上を考えて内側か
ら、あるいは外側から金属材料からなる支持筒に圧入さ
れて用いられていた。例えば特開昭６１−１２７９３４
号公報においては剛性スリーブ部材（摺動部材）の端部
を、半径方向外方に延びる外フランジ部とその外フラン
ジ部の外周縁から軸方向外側に延びる筒状延長部にて構
成させ、かつ摺動部材が一端に半径方向外方に延びる外
フランジ部を有する二つの円筒体にて構成され、かつ、
その二つの円筒体を、その外フランジ部がブツシュ組立
体の端部側に位置するように内筒部材と前記剛性スリー
ブ部材との間に配置させ、そのいずれかで圧入固定して
円筒体と内筒部材との間、あるいは剛性スリーブと円筒
体との間で相対回動を行なったり、又は円筒体をいずれ
にも固定せずに、剛性スリーブ及び内筒部材双方に対し
て相対回動し得るようにした構成が提案されている。
これらの摺動型ブツシュ組立体においては、その−例を
第３図に示したが、外筒部材（１２）と剛性スリーブ（
１０）とが同心的に配置され、その空間内に弾性部材（
１３）を注入して弾性部材（１３）が加硫−体成形され
、その後外筒部材（１２）を絞り加工して弾性部材（１
３）が圧縮される。そして肩部（１６）を有する剛性ス
リーブ（１０）にフランジ部（１８）を有する摺動部材
（１４）が両側から組付けられ、その上から止めリング
（１５）の圧入により、内筒部材（１１）及び、樹脂製
剛性部材（１４）の抜は出しが防止され、その外方へシ
ール部材（１７）が配設されるといった構成により製造
されていた。
ところが、この構成による方法であると円滑な摺動性能
を得るためには、径方向の公差を非常に厳しく管理する
必要があった。また、止めリング（１５）が必要である
し、その圧入においては圧入しすぎると円滑な摺動を阻
害するため、圧入時ストロークを管理したり、樹脂製の
摺動部材（１４）のフランジ部（１８）を破損するとい
う問題が生じるため、最大０．５ｍ程度の隙間（１９）
を設けてガタをもつよう隔置する必要があった。これに
しても、公差を厳しく管理したり圧入時にストロークを
管理する必要があったり、組付は作業は極めて煩わしい
ものであった。更に、軸方向の入力荷重が大きい時には
摺動樹脂へフランジ座面を大きくとる必要があり、摺動
型ブツシュ組立体をコンパクトにできない難点があった
。
そこで１本発明者らは、先に特願平１−３３２３２３号
明細書において、摺動層として、内筒部材の中央部に凸
部を設け、剛性スリーブの両端を小径とし、その小径部
を前記内筒部材中央部の凸部外径よりわずかに大きくし
て、内筒部材と剛性スリーブを同心的に配置し、剛性ス
リーブと、内筒部材の間に摺動部材樹脂を一体に成形し
た摺動構造を提案した。
このような摺動構造であれば、剛性スリーブと内筒部材
に対し、摺動部材樹脂を一体に成形するため、樹脂の成
形収縮により摺動部材樹脂円筒の半径方向内方に収縮が
起り、内筒に強固に固着されると共に、剛性スリーブと
の間にわずかに隙間を生じ、剛性スリーブと樹脂製の摺
動部材間で円周方向に摺動可能となる。また、このよう
な構成によれば、強固な抜は止め作用が得られるので。
止めリングが不要となりコンパクトな摺動型ブツシュ組
立体が提供できるのである。Conventionally, bush assemblies used for pivot connections in vehicle suspensions, etc., generally have a structure in which a cylindrical elastic member made of a rubber material is interposed between two inner and outer cylindrical members that are arranged concentrically. , and depending on the spring characteristics of the elastic member,
It mainly absorbs vibrations in the direction perpendicular to the axis. However, the bushing assembly having such a structure has a drawback in that increasing the rigidity in the direction perpendicular to the axis increases the torsional rigidity. For this purpose, between the cylindrical member and the elastic member,
For example, British Patent No. 10458
This method has been proposed in specifications such as No. 27 and US Pat. No. 3,331,642. In this sliding type bush assembly in which the sliding member is interposed between the cylindrical member and the elastic member, the sliding member reduces the frictional resistance between the cylindrical member and the elastic member, and Since the elastic members can easily rotate relative to each other, rigidity in the direction perpendicular to the axis can be maintained and torsional rigidity in the direction of rotation of the axis can be reduced. Conventionally, this cylindrical sliding member made of a sliding resin material has been press-fitted from the inside or outside into a support tube made of a metal material in order to strengthen it and improve reliability. For example, JP-A-61-127934
In the publication, the end of the rigid sleeve member (sliding member) is composed of an outer flange extending radially outward and a cylindrical extension extending axially outward from the outer periphery of the outer flange, and The sliding member is composed of two cylindrical bodies each having an outer flange portion extending radially outward at one end, and
The two cylindrical bodies are arranged between the inner cylindrical member and the rigid sleeve member so that the outer flange portions are located on the end side of the bushing assembly, and are press-fitted and fixed with either of them to connect the cylindrical bodies. Relative rotation between the inner cylindrical member or between the rigid sleeve and the cylindrical body, or relative rotation between the rigid sleeve and the inner cylindrical member without fixing the cylindrical body to either. A configuration has been proposed to obtain this. In these sliding type bush assemblies, an example of which is shown in FIG. 3, an outer cylinder member (12) and a rigid sleeve (
10) are arranged concentrically, and an elastic member (
13) is injected to form the elastic member (13) into a vulcanized body, and then the outer cylinder member (12) is drawn to form the elastic member (13).
3) is compressed. Then, the sliding member (14) having the flange part (18) is assembled from both sides to the rigid sleeve (10) having the shoulder part (16), and the inner cylindrical member ( 11) and the resin rigid member (14) is prevented from being pulled out, and a sealing member (17) is disposed on the outside thereof. However, with this method, in order to obtain smooth sliding performance, it was necessary to control the tolerance in the radial direction very strictly. In addition, a retaining ring (15) is required, and if the retaining ring (15) is press-fitted too much, smooth sliding will be inhibited. (18) may be damaged, so the maximum gap (19) is approximately 0.5 m.
It was necessary to set up and space them apart so that there was some play. Even in this case, it was necessary to strictly control the tolerances and control the stroke during press-fitting, and the assembly work was extremely troublesome. Furthermore, when the input load in the axial direction is large, it is necessary to provide a large flange seating surface for the sliding resin, which makes it difficult to make the sliding bushing assembly compact. Therefore, the present inventors previously proposed in Japanese Patent Application No. 1-332323 that a convex portion was provided in the center of the inner cylinder member as a sliding layer, both ends of the rigid sleeve were made small in diameter, and the small diameter portion was The inner cylinder member and the rigid sleeve are arranged concentrically with a diameter slightly larger than the outer diameter of the convex portion at the center of the inner cylinder member, and a sliding member resin is integrally molded between the rigid sleeve and the inner cylinder member. A sliding structure was proposed. With such a sliding structure, since the sliding member resin is integrally molded with the rigid sleeve and the inner cylinder member, the sliding member resin cylinder contracts radially inward due to molding shrinkage of the resin. It is firmly fixed to the inner cylinder, and a slight gap is created between it and the rigid sleeve, allowing it to slide in the circumferential direction between the rigid sleeve and the resin sliding member. Furthermore, with this configuration, a strong pull-out prevention effect can be obtained. This eliminates the need for a retaining ring, making it possible to provide a compact sliding bushing assembly.
【発明が解決しようとする課題］
しかしながら、前記提案した摺動型ブツシュ組立体では
、内筒部材中央部の凸部が、剛性スリーブの対応する凹
部及び両端の小径部だけで保持されていたため、過大な
軸方向への入力に対しては、樹脂フランジ部の面圧が過
大となり、保持強度や耐久性が充分ではなかった。
さらに、摺動部材樹脂は半径方向内方に収縮すると同時
に、軸線方向中央に向かって収縮するが。
内筒部材中央部の凸部と剛性スリーブの対応する凹部に
よる一山構造では、使用する樹脂の収縮率が大きく１面
圧や軸方向の縮みに影響を与え、収縮率の大きな樹脂を
使用した場合には、最悪の場合軸方向にガタが生じるき
らいがあったのである。
また、摺動部材を繊維強化樹脂材料（Ｆ ＲＰ 。
ＦＲＴＰ）で形成すれば、その軸方向への縮みも小さく
することができ、軸方向の機械強度も向上できるが、こ
のように、摺動部材を繊維強化樹脂材料で形成する場合
でも、材料コストが高くなったり、成形性が低下すると
いう問題や、ややもすると、摺動する相手部材を摩耗さ
せる可能性があったのである。
【課題を解決するための手段】
上記課題を検討した結果、次のような摺動型ブツシュ組
立体を開発した。すなわち、同心的に配置された内筒部
材（１）と外筒部材（２）の間に同心的に剛性スリーブ
（６）が介在し、剛性スリーブ（６）と外筒部材（２）
の間に弾性部材（３）が、また剛性スリーブ（６）と内
筒部材（１）の間に摺動部材（４）が介装してなる摺動
型ブツシュ組立体において、前記内筒部材（１）の外周
面に複数の凸部（ｌａ）を設け、剛性スリーブ（６）の
内周面へ前記内筒凸部（１ａ）に対応する位置に凹部（
６ａ）を設け、前記剛性スリーブ（６）と内筒部材（１
）の間の摺動部材（４）を樹脂により注入一体成形して
なることを特徴とする摺動型ブツシュ組立体である。
また、剛性スリーブ（６）の両側小径部（６ｂ）内径を
前記内筒部材（１）の複数の凸部（１ａ）外径よりもわ
ずかに大とし、 その間に摺動部材（４）樹脂を一体に
成形した構造の摺動型ブツシュ組立体を開発した。
更に、このような摺動型ブツシュ組立体においては、剛
性スリーブ（６）は端部内周又は外周にシール部材（７
）の環状剛性金具（８）を圧入あるいは絞り加工して、
少なくとも内筒部材（１）と剛性スリーブ（６）間をシ
ールするシール部材（７）を設けた構造とすることもで
きる。[Problems to be Solved by the Invention] However, in the sliding bushing assembly proposed above, the convex portion at the center of the inner cylinder member was held only by the corresponding concave portion of the rigid sleeve and the small diameter portions at both ends. In response to excessive input in the axial direction, the surface pressure on the resin flange portion became excessive, resulting in insufficient holding strength and durability. Furthermore, the sliding member resin contracts radially inward and at the same time contracts axially toward the center. In a single-mounted structure consisting of a convex part at the center of the inner cylinder member and a corresponding concave part of the rigid sleeve, the shrinkage rate of the resin used is large and affects the surface pressure and axial shrinkage. In the worst case scenario, there was a tendency for play to occur in the axial direction. Furthermore, if the sliding member is made of fiber-reinforced resin material (FRP, FRTP), the shrinkage in the axial direction can be reduced, and the mechanical strength in the axial direction can also be improved. Even when the member is made of fiber-reinforced resin material, there are problems such as increased material cost, decreased moldability, and the possibility of abrasion of the mating member on which it slides. [Means for Solving the Problems] As a result of studying the above problems, the following sliding type bushing assembly was developed. That is, the rigid sleeve (6) is interposed concentrically between the inner cylinder member (1) and the outer cylinder member (2) which are arranged concentrically, and the rigid sleeve (6) and the outer cylinder member (2)
In the sliding bushing assembly, an elastic member (3) is interposed between the rigid sleeve (6) and the inner cylinder member (1), and a sliding member (4) is interposed between the rigid sleeve (6) and the inner cylinder member (1). A plurality of convex portions (la) are provided on the outer circumferential surface of the rigid sleeve (6), and concave portions (la) are provided on the inner circumferential surface of the rigid sleeve (6) at positions corresponding to the inner cylinder convex portions (1a).
6a) is provided, and the rigid sleeve (6) and the inner cylinder member (1
This is a sliding bushing assembly characterized in that the sliding member (4) between the parts (4) is integrally molded with resin by injection molding. Further, the inner diameter of the small diameter portions (6b) on both sides of the rigid sleeve (6) is made slightly larger than the outer diameter of the plurality of convex portions (1a) of the inner cylinder member (1), and the sliding member (4) resin is placed between them. We have developed a sliding type bushing assembly with an integrally molded structure. Furthermore, in such a sliding bushing assembly, the rigid sleeve (6) has a sealing member (7) on the inner or outer circumference of the end.
) by press-fitting or drawing the annular rigid metal fitting (8),
It is also possible to adopt a structure in which a sealing member (7) is provided to seal at least between the inner cylinder member (1) and the rigid sleeve (6).
剛性スリーブと内筒部材に対し、摺動部材（４）樹脂に
より注入一体に成形するため、樹脂の成形収縮により摺
動部材（４） ４１Ｎ脂円筒の半径方向内方に収縮する
と同時に肉厚中心に厚み方向に収縮が起り、内筒に強固
に固着されると共に剛性スリーブ（６）との間にわずか
に隙間を生じ、剛性スリーブと樹脂製の摺動部材（４）
間で摺動可能となる。
また、軸線方向に入力された大荷重に対して、内筒部材
の複数（ｎ個）の凸部と、剛性スリーブの内径側に設け
られた複数（ｎ個）の凹部によって径方向のサイズをあ
げることなく一山構造の場合の１／ｎの面圧となり、摺
動部材と剛性スリーブ間の僅かな隙間が摺動を可能とし
ながら、軸線方向のガタを防ぐ作用が得られるので、極
めて起動トルクが低く、耐久性にすぐれたものとなる。
更に、剛性スリーブ（６）の小径部内径を前記内筒部材
（１）の凸部外径よりもわずかに大とすることによって
、樹脂の剪断破断力を大きくし、強固な抜は止めの作用
が得られる。
［実施例１
以下図面によって本発明の実施例を詳細に説明する。
第１図は本発明の摺動型ブツシュ組立体の第１実施例の
断面図である。
この摺動型ブツシュ組立体は、同心的に配置された内筒
部材（１）と外筒部材（２）との間に、内筒（１）側か
ら摺動部材（４）、剛性スリーブ（６）、ゴム弾性部材
（３）が同心的に設けられている。前記内筒部材（１）
には、 ２個の凸部（ｌａ） （ｌａ）を設け、かつ、
剛性スリーブ（６）の内径側中央部にも２個の凹部（６
ａ） （６ａ）を設けると共に、 剛性スリーブ（６）
の両側小径部（６ｂ） （６ｂ）を前記内筒部材（１）
中央部の凸部（ｌａ）（ｌａ）外径よりも僅かに大きく
している。この剛性スリーブ（６）は絞り加工によって
形成したため内外面が凸凹状となっている。
ここに示した摺動型ブツシュ組立体の組付けに際しては
、予め外筒部材（２）と剛性スリーブ（６）との間に弾
性部材（３）がゴム加硫同時接着された後に、外筒部材
（２）が絞り加工され、ゴムが予備圧縮されたものを内
筒部材（１）へ外挿し、 そして。
前記剛性スリーブ（６）と内筒部材（１）の間に摺動部
材（４）樹脂を一体に成形するか、あるいは、予め剛性
スリーブ（６）内に内筒部材（１）を内挿し、摺動部材
（４）樹脂を一体成形したものに、前記弾性部材（３）
及び外筒部材（２）とが加硫接着さ九た後、外筒部材（
２）が絞り加工されて、 ゴムが予１圧縮される。
剛性スリーブ（６）の外周端部にシール部材（７）を設
けている。環状のシール部材（７）はリング状の剛性金
具（８）とそれに一体のシールゴム及びシールを密着さ
せるガータースプリング（９）とからなり、剛性金具（
８）の圧入あるいは絞り加工により、内筒部材（１）と
剛性スリーブ（６）間にシール機構を設けることができ
る。圧入、絞り加工いずれの場合も必要に応じ、接着、
非接着で用いることができる。
第２図は本発明の摺動型ブツシュ組立体の第２実施例の
断面図である。
図示した摺動型ブツシュ組立体は、同心的に配置された
内筒部材（１）と外筒部材（２）との間に、内筒（１）
側から摺動部材（４）、剛性スリーブ（６）、筒状のハ
ウジング（５）、ゴム弾性部材（３）が同心的に設けら
れている。前記内筒部材（１）の外周面には３個の山か
らなる凸部（１ａ）を設け、ハウジング（５）内の剛性
スリーブ（６）の内周面に ３個の凹部（６ａ）を設け
ると共に、 剛性スリーブ（６）の両側小径部（６ｂ）
（６ｂ）を前記内筒部材（１）外周面の凸部（１ａ）
外径よりも僅かに大きくしている。この例は剛性スリー
ブ（６）の内径側凹部（６ａ）を内面加工によって形成
したため外周面には凹凸がない。
この摺動型ブツシュ組立体の組付けに際しては。
予めハウジング（５）と弾性部材（３）及び外筒部材（
２）とがゴム加硫同時接着された後に、外筒部材（２）
が絞り加工されゴムが予備圧縮されたものを剛性スリー
ブ（６）へ外挿圧入固定し、それらを内筒部材（１）へ
外挿し、そして、前記剛性スリーブ（６）と内筒部材（
１）の間に摺動部材（４）樹脂を一体に成形する。
あるいは、予め剛性スリーブ（６）内に内筒部材（１）
を内挿し、摺動部材（４）樹脂を一体成形したものに、
前記ハウジング（５）と弾性部材（３）及び外筒部材（
２）とが加硫接着されて、予備圧縮されたものを外挿圧
入固定するのである。
剛性スリーブ（６）のハウジング（５）の内周端部にシ
ール部材（７）を設けている。 この環状のシール部材
（７）により内筒部材（１）とハウジング（５）間にシ
ール機構を設けることができる。シール部材（７）は必
要に応じ圧入のみ、あるいは圧入接着して用いられる。
摺動部材（４）に使用する樹脂としては、ポリアミド樹
脂、ポリアセタール樹脂、高分子量ポリエチレン、ポリ
オキシメチレン樹脂、あるいはこれらとガラス繊維や、
炭素繊維による短繊維補強樹脂などがあげられる。
摺動部材（４）樹脂は半径方向内方に収縮すると同時に
、軸線方向中央に向かって僅かに収縮し、樹脂の保持力
を向上させるが、複数個所で半径方向外方に膨出してい
るため、それに対応して受圧面が形成され、軸方向入力
に対する面圧を低くおさえることができると同時に、複
数の凸部と凹部が樹脂の収縮により噛み合い軸方向のガ
タをなくすことができる。使用する樹脂によっても異な
るが、Ｉａ脂の肉厚を１〜２Ｗｌに設定すれば、剛性ス
リーブと樹脂製摺動部材の間の隙間は０．１履以下に抑
えることができる。
更に、大きな抜は荷重が必要とされるものにおいては、
上記のように内筒部材（１）と剛性スリーブ（６）を同
心的に配置した後、前記内筒部材（１）を拡径または剛
性スリーブ（６）を絞り加工して、剛性スリーブ（６）
の小径部（６ｂ）内径を前記内筒部材（１）の凸部（１
ａ）外径よりも小さくするといった方法により対応をす
ることもできる。
以上本発明は、これら基本的構成に基づいて、その精神
を逸脱することなく、当業者の知識に基づいて種々なる
変更、改良等を施した態様で実施し得るものであること
はいうまでもない。
【発明の効果）
本発明は以上のよう↓こ樹脂の収縮傾向を巧みに利用し
た摺動型ブツシュ組立体の構造を提供するものである。
摺動部材となる樹脂の成形収縮により、複数の凹凸に沿
った収縮が起り、内筒に強固に固着されると同時に剛性
スリーブとの間にわずかに隙間を生じ、剛性スリーブと
樹脂の間で摺動可能となるので、これによって、従来の
煩わしい摺動部材の組付は作業の必要もなく摺動部材を
一体形成することができ、摺動抵抗値も一定の値とする
ことができた。
各部品の寸法公差は特に厳しく管理する必要もなく、ま
た止めリングを必要とせず、従ってその圧入管理も不要
となり、組付は作業が簡略化されると共に、使用部材の
低減を可能としたのである。
更に、軸線方向に大荷重が入力された場合でも、内筒部
材の複数の凸部と、剛性スリーブの内径側に設けられた
複数の凹部によって十分な受圧面積が得られるので優れ
た耐久性が確保でき、摺動部材と剛性スリーブ間の僅か
な隙間が摺動を可能としながら、軸線方向のガタをゼロ
とするなど、乗り心地を含む車両の快適性が確保される
こととなった・Since the sliding member (4) is injected and integrally molded with resin into the rigid sleeve and inner cylinder member, the sliding member (4) contracts inward in the radial direction of the 41N fat cylinder due to molding shrinkage of the resin, and at the same time the center of wall thickness Shrinkage occurs in the thickness direction, and while the inner cylinder is firmly fixed to the inner cylinder, a slight gap is created between the rigid sleeve (6) and the resin sliding member (4).
It becomes possible to slide between the two. In addition, against large loads input in the axial direction, the radial size can be reduced by the multiple (n) convex portions of the inner cylinder member and the multiple (n) concave portions provided on the inner diameter side of the rigid sleeve. The surface pressure is 1/n of that of a single thread structure without increasing the pressure, and the slight gap between the sliding member and the rigid sleeve allows sliding while preventing play in the axial direction, making it extremely easy to start. It has low torque and excellent durability. Furthermore, by making the inner diameter of the small diameter part of the rigid sleeve (6) slightly larger than the outer diameter of the convex part of the inner cylindrical member (1), the shear breaking force of the resin is increased and a strong pull-out prevention effect is achieved. is obtained. [Embodiment 1] An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a sectional view of a first embodiment of the sliding bushing assembly of the present invention. This sliding bushing assembly consists of a sliding member (4), a rigid sleeve ( 6) A rubber elastic member (3) is provided concentrically. The inner cylinder member (1)
is provided with two protrusions (la) (la), and
There are also two recesses (6) in the center of the inner diameter side of the rigid sleeve (6).
a) (6a) and a rigid sleeve (6);
Both side small diameter portions (6b) (6b) are connected to the inner cylinder member (1).
The outer diameter of the convex portion (la) at the center is slightly larger than the outer diameter of the convex portion (la). This rigid sleeve (6) is formed by drawing, so its inner and outer surfaces are uneven. When assembling the sliding bushing assembly shown here, the elastic member (3) is bonded between the outer cylinder member (2) and the rigid sleeve (6) at the same time as rubber vulcanization, and then the outer cylinder is attached. The member (2) is drawn and the rubber is pre-compressed and then extrapolated onto the inner cylinder member (1). Either the sliding member (4) resin is integrally molded between the rigid sleeve (6) and the inner cylinder member (1), or the inner cylinder member (1) is inserted into the rigid sleeve (6) in advance, The sliding member (4) is integrally molded with resin, and the elastic member (3)
After the outer cylinder member (2) and the outer cylinder member (2) are vulcanized and bonded, the outer cylinder member (
2) is drawn and the rubber is pre-compressed. A sealing member (7) is provided at the outer peripheral end of the rigid sleeve (6). The annular sealing member (7) consists of a ring-shaped rigid fitting (8), an integral seal rubber and a garter spring (9) that brings the seal into close contact with the rigid fitting (8).
By press-fitting or drawing 8), a sealing mechanism can be provided between the inner cylinder member (1) and the rigid sleeve (6). For both press-fitting and drawing processing, adhesive,
Can be used without adhesive. FIG. 2 is a sectional view of a second embodiment of the sliding bushing assembly of the present invention. The illustrated sliding bushing assembly has an inner cylinder (1) and an outer cylinder member (2) arranged concentrically between the inner cylinder member (1) and the outer cylinder member (2).
A sliding member (4), a rigid sleeve (6), a cylindrical housing (5), and a rubber elastic member (3) are provided concentrically from the side. A protrusion (1a) consisting of three peaks is provided on the outer peripheral surface of the inner cylinder member (1), and three recesses (6a) are provided on the inner peripheral surface of the rigid sleeve (6) in the housing (5). In addition, both small diameter portions (6b) of the rigid sleeve (6) are provided.
(6b) as the convex portion (1a) on the outer peripheral surface of the inner cylinder member (1).
It is made slightly larger than the outer diameter. In this example, the inner diameter side recess (6a) of the rigid sleeve (6) is formed by internal processing, so there is no unevenness on the outer peripheral surface. When assembling this sliding bushing assembly. The housing (5), elastic member (3) and outer cylinder member (
After the outer cylinder member (2) and are bonded simultaneously with rubber vulcanization, the outer cylinder member (2)
The drawn and pre-compressed rubber is inserted into the rigid sleeve (6), press-fitted and fixed, and then inserted into the inner cylinder member (1), and then the rigid sleeve (6) and the inner cylinder member (
A sliding member (4) resin is integrally molded between 1). Alternatively, the inner cylinder member (1) may be placed inside the rigid sleeve (6) in advance.
is inserted, and the sliding member (4) is integrally molded with resin.
The housing (5), the elastic member (3) and the outer cylinder member (
2) are vulcanized and bonded, and the pre-compressed material is inserted and press-fitted into place. A sealing member (7) is provided at the inner peripheral end of the housing (5) of the rigid sleeve (6). This annular sealing member (7) allows a sealing mechanism to be provided between the inner cylinder member (1) and the housing (5). The sealing member (7) may be used only by press-fitting or by press-fitting and bonding, as required. As the resin used for the sliding member (4), polyamide resin, polyacetal resin, high molecular weight polyethylene, polyoxymethylene resin, or a combination of these and glass fiber,
Examples include short fiber reinforced resin made of carbon fiber. Sliding member (4) The resin contracts inward in the radial direction and at the same time contracts slightly toward the center in the axial direction, improving the holding power of the resin, but because it bulges outward in the radial direction at multiple locations. A pressure-receiving surface is formed correspondingly, and it is possible to suppress the surface pressure against axial input to a low level, and at the same time, the plurality of convex portions and concave portions engage with each other due to the contraction of the resin, thereby eliminating play in the axial direction. Although it varies depending on the resin used, if the thickness of the Ia fat is set to 1 to 2 Wl, the gap between the rigid sleeve and the resin sliding member can be suppressed to 0.1 or less. Furthermore, in cases where large pulling loads are required,
After arranging the inner cylindrical member (1) and the rigid sleeve (6) concentrically as described above, the inner cylindrical member (1) is expanded in diameter or the rigid sleeve (6) is drawn. )
The inner diameter of the small diameter portion (6b) of the convex portion (1) of the inner cylinder member (1) is
a) It is also possible to take measures such as making the diameter smaller than the outer diameter. It goes without saying that the present invention can be implemented in various modifications and improvements based on the knowledge of those skilled in the art based on these basic configurations without departing from the spirit thereof. do not have. [Effects of the Invention] As described above, the present invention provides a structure of a sliding bushing assembly that skillfully utilizes the tendency of resin to shrink. Due to the molding shrinkage of the resin that becomes the sliding member, it shrinks along the multiple irregularities, and at the same time it is firmly fixed to the inner cylinder, a slight gap is created between the rigid sleeve and the resin. Since it can be slid, the sliding member can be integrally formed without the need for the conventional troublesome assembly of sliding members, and the sliding resistance value can also be kept at a constant value. . There is no need to strictly control the dimensional tolerances of each part, and there is no need for retaining rings, so there is no need to manage their press-fitting, which simplifies assembly work and reduces the number of parts used. be. Furthermore, even when a large load is input in the axial direction, a sufficient pressure receiving area is obtained by the multiple convex portions of the inner cylinder member and the multiple concave portions provided on the inner diameter side of the rigid sleeve, resulting in excellent durability. The small gap between the sliding member and the rigid sleeve allows for sliding movement, while eliminating play in the axial direction, ensuring vehicle comfort including ride comfort.
第１，２図は本発明の摺動型ブツシュ組立体の断面図で
ある。第３図は同従来品の断面図である。
内筒部材 （１ａ）内筒凸部
外筒部材 （３）弾性部材
摺動部材 （５）ハウジング
剛性スリーブ （６ａ）剛性スリーブ凹部剛性スリ
ーブ端部小径部
シール部材 （８）剛性金具
ガータースプリング
以上1 and 2 are cross-sectional views of the sliding bushing assembly of the present invention. FIG. 3 is a sectional view of the conventional product. Inner cylinder member (1a) Inner cylinder convex part Outer cylinder member (3) Elastic member sliding member (5) Housing rigid sleeve (6a) Rigid sleeve concave part Rigid sleeve end small diameter part sealing member (8) Rigid metal garter spring or higher
Claims (1)
）の間に同心的に剛性スリーブ（６）が介在し、剛性ス
リーブ（６）と外筒部材（２）の間に弾性部材（３）が
、また剛性スリーブ（６）と内筒部材（１）の間に摺動
部材（４）が介装してなる摺動型ブッシュ組立体におい
て、前記内筒部材（１）の外周面に複数の凸部（１ａ）
を設け、剛性スリーブ（６）の内周面へ前記内筒凸部（
１ａ）に対応する位置に凹部（６ａ）を設け、前記剛性
スリーブ（６）と内筒部材（１）の間の摺動部材（４）
を樹脂により注入一体に成形してなることを特徴とする
摺動型ブッシュ組立体。 ２ 請求項１記載の剛性スリーブ（６）の両側小径部（
６ｂ）内径を前記内筒部材（１）の複数の凸部（１ａ）
外径よりもわずかに大とし、その間に摺動部材（４）樹
脂を一体に成形してなることを特徴とする摺動型ブッシ
ュ組立体。[Claims] 1. An inner cylinder member (1) and an outer cylinder member (2) arranged concentrically.
), an elastic member (3) is interposed concentrically between the rigid sleeve (6) and the outer cylinder member (2), and an elastic member (3) is interposed between the rigid sleeve (6) and the inner cylinder member (1). ) in which a sliding member (4) is interposed between the inner cylinder member (1) and a plurality of convex portions (1a) on the outer circumferential surface of the inner cylinder member (1).
is provided, and the inner cylinder convex portion (
A recess (6a) is provided at a position corresponding to 1a), and a sliding member (4) is provided between the rigid sleeve (6) and the inner cylinder member (1).
A sliding bushing assembly characterized by being integrally molded by injection of resin. 2. The small diameter portions on both sides of the rigid sleeve (6) according to claim 1 (
6b) Adjust the inner diameter to the plurality of convex portions (1a) of the inner cylinder member (1).
A sliding type bushing assembly characterized by having a diameter slightly larger than the outer diameter and integrally molding a sliding member (4) of resin therebetween.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5218790A JP2918604B2 (en) | 1990-03-03 | 1990-03-03 | Sliding bush assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5218790A JP2918604B2 (en) | 1990-03-03 | 1990-03-03 | Sliding bush assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03255236A true JPH03255236A (en) | 1991-11-14 |
| JP2918604B2 JP2918604B2 (en) | 1999-07-12 |
Family
ID=12907804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5218790A Expired - Fee Related JP2918604B2 (en) | 1990-03-03 | 1990-03-03 | Sliding bush assembly |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2918604B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20210010205A (en) | 2019-07-19 | 2021-01-27 | 현대자동차주식회사 | Bush With Improved Tuning Freedom and Suspension System Thereby |
-
1990
- 1990-03-03 JP JP5218790A patent/JP2918604B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2918604B2 (en) | 1999-07-12 |
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