JP2606350Y2 - Mounting structure for resin boots - Google Patents
Mounting structure for resin bootsInfo
- Publication number
- JP2606350Y2 JP2606350Y2 JP1993074607U JP7460793U JP2606350Y2 JP 2606350 Y2 JP2606350 Y2 JP 2606350Y2 JP 1993074607 U JP1993074607 U JP 1993074607U JP 7460793 U JP7460793 U JP 7460793U JP 2606350 Y2 JP2606350 Y2 JP 2606350Y2
- Authority
- JP
- Japan
- Prior art keywords
- mounting
- mounting portion
- boot
- mating
- sealing surface
- 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
Links
Landscapes
- Diaphragms And Bellows (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本考案は自動車のステアリング機
構に使用されるラックアンドピニオンステアリングブー
ツ（ステアリングブーツ）の他、ドライブシャフトに使
用される等速ジョイントブーツやストラッドサスペンシ
ョン用ダストカバー、産業機械等に使用されるシリンダ
ーカバーなどの相手軸、ギア、ベアリングなどの保護及
び密封を目的とする樹脂ブーツの取付構造に関する。更
に詳述すると、本考案は、軸径の大きな部分を乗り越え
て相手側部品の被装着部に両端あるいは一端の装着部が
嵌め込まれて固定されるステアリングブーツなどの樹脂
ブーツの取付構造に関する。The present invention relates to a rack and pinion steering boot (steering boot) used for a steering mechanism of an automobile, a constant velocity joint boot used for a drive shaft, a dust cover for a strud suspension, an industrial machine, and the like. The present invention relates to a mounting structure of a resin boot for protecting and sealing a mating shaft, such as a cylinder cover, a gear, a bearing, and the like used in a vehicle. Further More specifically, the present invention relates to the mounting structure of the resin boot, such as a steering boots mounting portions at both ends or one end mating attachment section of the ride over a large portion mating parts of the shaft diameter is fixed fitted into it.
【０００２】[0002]
【従来の技術】樹脂ブーツを相手軸や相手ハウジングな
どの相手側部品に嵌装する場合、主要機能である密封性
を高めるには締代を増す必要がある。しかし、締代の増
大と共に挿入抵抗（荷重）が高まり装着作業性が悪くな
る問題がある。特に、樹脂ブーツの軸方向の位置決めを
兼ねさせるため、図７に示すように、軸径の大きな部分
１０２を乗り越えて相手側部品１０１の被装着部１０３
に樹脂ブーツ１０５の両端の装着部１０６を嵌装させる
場合に問題となる。2. Description of the Related Art When a resin boot is fitted to a mating part such as a mating shaft or a mating housing, it is necessary to increase the tightening margin in order to improve the sealing function which is a main function. However, there is a problem that the insertion resistance (load) increases with an increase in the interference and the mounting workability deteriorates. In particular, since serve also as the positioning of the resin boot in the axial direction as shown in FIG. 7, the mounting portion 103 of the mating parts 101 rides over the major portion 102 of the shaft diameter
This is a problem when fitting the mounting portions 106 at both ends of the resin boot 105 to the resin boot 105.
【０００３】そこで、その対策として、締代を密封性が
確保できる限界近くまで小さくする方法や図７に示すよ
うに相手側部品１０１の軸径の大きな部分１０２の手前
側にテーパー部１０４を設けたり、あるいは図８に示す
ように挿入端部に面取り部２０４を設ける方法が採用さ
れている。さらに図７に示すように、樹脂ブーツ１０５
の相手側部品１０１とシール面１０７よりも先に当接す
る端面（角部）１０８を曲面としたり、図８に示すよう
に端面２０８をテーパー面とする方法が採用されてい
る。Therefore, as a countermeasure, there is a method of reducing the interference to near the limit at which the sealing performance can be ensured, or a tapered portion 104 is provided on the front side of the large-diameter portion 102 of the mating part 101 as shown in FIG. 8, or a method of providing a chamfered portion 204 at the insertion end as shown in FIG. Further, as shown in FIG.
The end face (corner) 108 that comes into contact with the mating component 101 before the sealing face 107 is made a curved face, or the end face 208 is made a tapered face as shown in FIG.
【０００４】[0004]
【考案が解決しようとする課題】しかしながら、締代を
小さくすれば、樹脂ブーツ１０５の装着部１０６は相手
側部品１０１の軸径の大きな部分１０２を容易に乗り越
えられるが、シール性に劣る問題がある。また、その反
面、締代を大きくすれば、シール面１０７が軸径の大き
な部分１０２を乗り越える際に傷つきシール性を低下さ
せる虞があるため好ましくない。However, if the interference is reduced, the mounting portion 106 of the resin boot 105 can easily get over the large-diameter portion 102 of the mating part 101, but the sealing performance is poor. is there. On the other hand, increasing the interference is not preferable because the sealing surface 107 may be damaged when the sealing surface 107 gets over the portion 102 having a large shaft diameter and the sealing performance may be reduced.
【０００５】更に、相手側部品（軸）１０１にテーパー
面１０４を形成するだけでは図９に示すようにシール面
１０７が軸径の大きな部分１０２を乗り越える際にその
角部１０９で傷つきシール性を低下させる虞があること
から装着作業性の改善は未だ不十分であり、更に、樹脂
ブーツ１０５の相手側部品１０１に挿入される側の端面
に曲面部１０８やテーパー部２０８を設けても、軸径の
大きな部分１０２に乗り上げる際に大径部１０２の角部
１０９でシール面１０７に傷がつき易く、また作業性も
あまり改善できない。Further, if only the tapered surface 104 is formed on the mating part (shaft) 101, as shown in FIG. 9, when the sealing surface 107 gets over the portion 102 having a large shaft diameter, the corner portion 109 is damaged and the sealing performance is improved. The mounting workability is still insufficiently improved due to the possibility of lowering. Even if the curved surface portion 108 or the tapered portion 208 is provided on the end face of the resin boot 105 on the side to be inserted into the mating component 101, the shaft When riding on the large-diameter portion 102, the sealing surface 107 is easily damaged at the corner 109 of the large-diameter portion 102, and workability cannot be improved much.
【０００６】本考案は、相手側部品に両端あるいは一端
の装着部を固定しようとするとき、シール面が傷つかず
かつシール性も低下しないようにする樹脂ブーツの取付
構造を提供することを目的とする。According to the present invention, when a mounting portion at both ends or one end is to be fixed to a mating component, a resin boot is attached so that a sealing surface is not damaged and a sealing property is not deteriorated.
The purpose is to provide a structure .
【０００７】[0007]
【課題を解決するための手段】かかる目的を達成するた
め、本考案は、軸径の大きな部分を乗り越えて相手側部
品の被装着部に嵌装される装着部を両端あるいは一端に
有する樹脂ブーツの取付構造において、相手側部品の被
装着部に対し適度の締代を有する装着部の内周面で構成
されるシール面のブーツ挿入方向前側の位置にテーパ部
を設けると共に当該テーパ部の内周に少なくとも２個以
上の階段状当接部を設け、かつ少なくともシール面に近
い２個の階段状当接部のシール面に遠い側に位置する角
部を通過する直円錐の母線よりも外側にシール面が配置
されるようにしている。To achieve Means for Solving the Problems] above object, the present invention is the mounting portion to be fitted to overcome a large portion of the shaft diameter to the mating attachment section of the mating parts at both ends or one end
In the mounting structure of the resin boot having a tapered portion to the boot insertion direction front side of the position of the formed sealing surface is an inner circumferential surface of the mounting portion having a moderate tightening margin to the <br/> mounting portion of the mating parts
And at least two or more step-like contact portions are provided on the inner periphery of the tapered portion , and at least two step-like contact portions close to the seal surface are located on the side far from the seal surface.
The sealing surface is arranged outside the generating line of the right cone passing through the portion .
【０００８】[0008]
【作用】したがって、シール面よりも先にテーパ部が相
手側部品に挿入されることになり、このテーパ部の内周
に設けられた２個以上の階段状当接部が相手側部品にシ
ール面よりも先に接触し、シール面を浮上させて挿入さ
れるため、シール面の相手軸への不要の接触を防げ傷つ
きによる密封性低下を防ぐ。しかも、樹脂ブーツの装着
部と相手側部品とは、軸径の大きな部分の手前の面と階
段状当接部の先端の角部だけが接触するため、装着抵抗
が小さい。Accordingly, the tapered portion is inserted into the component on the far side before the sealing surface , and two or more steps are provided on the inner periphery of the tapered portion. Since the contact portion comes into contact with the mating component before the sealing surface, and is inserted with the sealing surface floating, the unnecessary contact of the sealing surface with the mating shaft is prevented, and deterioration of sealing performance due to damage is prevented. In addition, since the mounting portion of the resin boot and the mating component only come into contact with the front surface of the large-diameter portion and the corner at the tip of the step-like contact portion, the mounting resistance is small.
【０００９】[0009]
【実施例】以下、本考案の構成を図面に示す実施例に基
づいて詳細に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of the present invention will be described below in detail with reference to the embodiments shown in the drawings.
【００１０】図１〜図３に樹脂ブーツの小径側装着部に
本考案を適用した実施例を示す。樹脂ブーツ１は、蛇腹
部２の一端には相手側部品たる軸（図６に符号１１で示
される）へ当該ブーツ１を取り付けるための小径の装着
部３を備えている。この小径の装着部３は、図６に示す
ように、相手側部品・軸１１の被装着部１３よりも軸径
の大きな部分１２を乗り越えてから被装着部１３に密着
させ、その周りを締め付けバンド（図示省略）などで締
め付けることによって固定されるように設けられてい
る。1 to 3 show an embodiment in which the present invention is applied to a small diameter side mounting portion of a resin boot. The resin boot 1 is provided at one end of the bellows portion 2 with a small-diameter mounting portion 3 for attaching the boot 1 to a shaft (indicated by reference numeral 11 in FIG. 6) which is a mating component. Mounting portion 3 of the small diameter, as shown in FIG. 6, it is adhered to the mating attachment section 13 from over the major portion 12 of the shaft diameter than the mounting portion 13 of the mating parts and the shaft 11, tightened around the It is provided so as to be fixed by tightening with a band (not shown) or the like.
【００１１】そして、小径の装着部３の内周面で構成さ
れるシール面４よりも先に相手側部品に挿入される側に
は、即ちブーツ挿入方向前側の位置にはテーパ部１７が
設けられており、当該テーパ部１７の内周には、即ちシ
ール面４の終端から蛇腹部２にかけて、少なくとも２個
以上の階段状当接部５，５が設けられている。更に、こ
の階段状当接部５は、少なくともシール面４寄りの２個
の階段状当接部５，５のシール面４に遠い側に位置する
角部６を通過する直円錐の母線（仮想線で示されている
線）１０よりも外側にシール面４が配置される位置関係
となるように設けられている。具体的には、階段状当接
部５は、図１に示すように、相手側部品たる軸の外周面
と平行な周面８と軸直交平面７とを有する階段状に形成
しても良いし、図２に示すように、軸と交わる方向の斜
面７’と軸周面と平行な周面８とを有する階段状に形成
しても良い。更に、図３に示すように、シール面４から
蛇腹部２にかけて立ち上がる斜面１８と、当該斜面１８
から垂直に突出する矩形状の突起９の側面１９とで形成
しても良い。A tapered portion 17 is provided on the side of the small-diameter mounting portion 3 which is inserted into the mating component before the sealing surface 4 formed by the inner peripheral surface of the mounting portion 3, ie, on the front side in the boot insertion direction.
At least two or more step-like contact portions 5 are provided on the inner periphery of the tapered portion 17, that is, from the end of the sealing surface 4 to the bellows portion 2. Furthermore, the step-like contact portion 5 is located at least on the side of the two step-like contact portions 5, 5 near the seal surface 4, far from the seal surface 4.
The sealing surface 4 is provided so as to have a positional relationship in which the sealing surface 4 is disposed outside a right-cone generating line (line indicated by a virtual line) 10 passing through the corner 6 . Specifically, as shown in FIG. 1, the step-shaped contact portion 5 may be formed in a stepped shape having a peripheral surface 8 parallel to the outer peripheral surface of the shaft as the mating component and a plane 7 orthogonal to the axis. Then, as shown in FIG. 2, it may be formed in a step shape having a slope 7 ′ in a direction intersecting with the axis and a peripheral surface 8 parallel to the axis peripheral surface. Further, as shown in FIG. 3, a slope 18 rising from the sealing surface 4 to the bellows portion 2,
May be formed by the side surface 19 of the rectangular projection 9 vertically projecting therefrom.
【００１２】階段状当接部５は、本実施例の場合、小径
側の装着部３に設けた場合について主に説明している
が、大径部側の装着部１５に設けるようにしても良い。
この場合には、例えば図４に示すように、大径の装着部
１５よりも先に相手側部品に挿入される側即ちシール面
１６の外側に、換言するとブーツ挿入方向前側の位置に
テーパ部１７を設け、このテーパ部１７の内周に開口端
に向かうほど径が一定ピッチで大きくなる階段状当接部
５を設ける。また、図５に示すように、階段状当接部５
は、シール面１５寄りの最初の一段は比較的段差が小さ
く、次の段は比較的段差が大きな不規則な形状であって
も良い。また、階段状当接部５の角部６は曲面に形成さ
れたり、面取りが行われる場合がある。In the present embodiment, the step-like contact portion 5 is mainly described as being provided on the small-diameter side mounting portion 3, but may be provided on the large-diameter portion mounting portion 15. good.
In this case, for example, as shown in FIG. 4, on the side to be inserted into the mating component before the large-diameter mounting portion 15, that is, outside the sealing surface 16, in other words, at the position on the front side in the boot insertion direction.
The tapered portion 17 is provided, Keru set a stepped abutting portion 5 whose diameter increases toward the opening end increases at a constant pitch inner periphery of the tapered portion 17. In addition, as shown in FIG.
The first step near the sealing surface 15 may have an irregular shape with a relatively small step, and the next step may have an irregular shape with a relatively large step. Further, the corner portion 6 of the step-like contact portion 5 may be formed in a curved surface or chamfered.
【００１３】以上のように構成された樹脂ブーツ１の取
付構造によれば、相手側部品たる軸１１に装着する場
合、各装着部３，１５のシール面４，１６を相手側部品
１１に接触させずに装着作業を完了させることができ
る。例えば、図１に示す小径側装着部３の場合を例に挙
げると、図６に示すように、軸径の大きな部分１２を乗
り越えようとするとき、まず階段状当接部５が先に相手
側部品たる軸１１のテーパー面１４に当接してシール面
を持ち上げるように樹脂ブーツ１を押し広げる。このと
き、階段状当接部５は突出した角部６が相手側部品１１
のテーパー面１４に接触するため摩擦抵抗が小さく容易
に軸径の大きな部分１２を乗り越えることができる。軸
径の大きな部分１２を乗り越えた後、被装着部１３にシ
ール面４が落ち込み装着部３が嵌合される。[0013] The preparative resin boot 1, which is configured as described above
According to the attachment structure , when mounting on the shaft 11 which is a mating component, the mounting operation can be completed without bringing the sealing surfaces 4 and 16 of the mounting portions 3 and 15 into contact with the mating component 11. For example, taking the case of the small diameter side mounting portion 3 shown in FIG. 1 as an example, as shown in FIG. 6, when trying to get over the large shaft diameter portion 12, first, the stair-shaped contact portion 5 first engages with the other. The resin boot 1 is pushed and spread so as to abut the tapered surface 14 of the shaft 11 as a side component and lift the sealing surface. At this time, the protruding corner 6 of the step-like contact portion 5 has a mating part 11.
Because of the contact with the tapered surface 14, the frictional resistance is small, and the portion 12 having a large shaft diameter can be easily overcome. After overcoming a major portion 12 of the shaft diameter, the sealing surface 4 is fitted into drop fitting 3 to the mating attachment section 13.
【００１４】[0014]
【考案の効果】以上の説明より明らかなように、本考案
の樹脂ブーツの取付構造は、相手側部品の装着部に対し
適度の締代を有する装着部の内周面で構成されるシール
面のブーツ挿入方向前側位置にテーパ部を設けると共に
当該テーパ部の内周に少なくとも２個以上の階段状当接
部を設け、かつ少なくともシール面に近い２個の階段状
当接部のシール面に遠い側に位置する角部を通過する直
円錐の母線よりも外側に前記シール面が配置されている
ので、軸径の大きな部分を乗り越える際にシール面が接
触せずに階段状当接部が線接触することによって挿入作
業が行われ、シール性を損なうことなく樹脂ブーツの装
着作業性を改善できる。即ち、装着部の締代を低下させ
ずに装着時の挿入荷重を軽減できる。As is apparent from the above description, the mounting structure of the resin boot of the present invention has a sealing surface formed by the inner peripheral surface of the mounting portion having an appropriate interference with the mounting portion of the mating component. And a tapered section at the front side in the boot insertion direction
At least two or more step-shaped contact portions are provided on the inner periphery of the tapered portion , and a straight cone that passes through at least a corner portion of the two step-shaped contact portions that are close to the sealing surface and is farther from the sealing surface. The sealing surface is arranged outside the generating line, so that when stepping over a portion having a large shaft diameter, the sealing surface does not come into contact with the stair-like abutting portion and the insertion work is performed by the line contact, and the sealing operation is performed. The workability of mounting the resin boot can be improved without impairing the performance. That is, the insertion load at the time of mounting can be reduced without reducing the interference of the mounting portion.
【図１】本考案の樹脂ブーツの取付構造の一実施例を示
す小径側装着部の要部拡大断面図である。FIG. 1 is an enlarged cross-sectional view of a main part of a small-diameter side mounting portion showing an embodiment of a mounting structure for a resin boot of the present invention.
【図２】本考案の樹脂ブーツの取付構造の他の実施例を
示す小径側装着部の要部拡大断面図である。FIG. 2 is an enlarged sectional view of a main part of a small-diameter side mounting portion showing another embodiment of the resin boot mounting structure of the present invention.
【図３】本考案の樹脂ブーツの取付構造の更に他の実施
例を示す小径側装着部の要部拡大断面図である。FIG. 3 is an enlarged cross-sectional view of a main part of a small-diameter side mounting portion showing still another embodiment of the resin boot mounting structure of the present invention.
【図４】本考案を大径部側の装着部に適用した実施例を
示す要部拡大図である。FIG. 4 is an enlarged view of a main part showing an embodiment in which the present invention is applied to a mounting part on a large diameter part side.
【図５】本考案を大径部側の装着部に適用した他の実施
例を示す要部拡大図である。FIG. 5 is an enlarged view of a main portion showing another embodiment in which the present invention is applied to a mounting portion on a large diameter portion side.
【図６】樹脂ブーツの装着部を相手側部品に装着する作
業を説明する断面図である。FIG. 6 is a cross-sectional view for explaining an operation of mounting the mounting portion of the resin boot to a counterpart component.
【図７】従来の樹脂ブーツの装着部の構造を示す縦断面
図である。FIG. 7 is a longitudinal sectional view showing a structure of a mounting portion of a conventional resin boot.
【図８】従来の樹脂ブーツの他の構造を示す縦断面図で
ある。FIG. 8 is a longitudinal sectional view showing another structure of a conventional resin boot.
【図９】従来の樹脂ブーツを相手側部品に装着する時の
装着部の状態を示す説明図である。FIG. 9 is an explanatory diagram showing a state of a mounting portion when a conventional resin boot is mounted on a counterpart component.
１ 樹脂ブーツ ３，１５ ブーツの装着部 ４，１６ ブーツのシール面 ５ 階段状当接部 ６ 階段状の角部 １０ 直円錐の母線 １１ 相手側部品（軸） １２ 装着部よりも軸径の大きな部分 １３ 相手側部品の被装着部１７ テーパ部 DESCRIPTION OF SYMBOLS 1 Resin boot 3,15 Boot mounting part 4,16 Boot sealing surface 5 Step-shaped contact part 6 Step-shaped corner part 10 Straight cone bus bar 11 Opponent part (shaft) 12 Shaft diameter larger than mounting part mating attachment section 17 tapered portion of the portion 13 mating parts
Claims (1)
品の被装着部に嵌装される装着部を両端あるいは一端に
有する樹脂ブーツの取付構造において、相手側部品の被
装着部に対し適度の締代を有する装着部の内周面で構成
されるシール面のブーツ挿入方向前側の位置にテーパ部
を設けると共に当該テーパ部の内周に少なくとも２個以
上の階段状当接部を設け、かつ少なくとも前記シール面
に近い２個の階段状当接部の前記シール面に遠い側に位
置する角部を通過する直円錐の母線よりも外側に前記シ
ール面が配置されたことを特徴とする樹脂ブーツ。1. A mounting portion to be mounted on a mounting portion of a mating component over a portion having a large shaft diameter at both ends or one end .
In the mounting structure of the resin boot having a tapered portion to the boot insertion direction front side of the position of the formed sealing surface is an inner circumferential surface of the mounting portion having a moderate tightening margin to the <br/> mounting portion of the mating parts
And at least two or more step-like contact portions are provided on the inner periphery of the tapered portion , and at least two step-like contact portions close to the seal surface are located on the side far from the seal surface.
A resin boot, wherein the sealing surface is arranged outside a generatrix of a straight cone passing through a corner portion to be placed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1993074607U JP2606350Y2 (en) | 1993-12-29 | 1993-12-29 | Mounting structure for resin boots |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1993074607U JP2606350Y2 (en) | 1993-12-29 | 1993-12-29 | Mounting structure for resin boots |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0742457U JPH0742457U (en) | 1995-08-04 |
| JP2606350Y2 true JP2606350Y2 (en) | 2000-10-23 |
Family
ID=13552036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1993074607U Expired - Fee Related JP2606350Y2 (en) | 1993-12-29 | 1993-12-29 | Mounting structure for resin boots |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2606350Y2 (en) |
-
1993
- 1993-12-29 JP JP1993074607U patent/JP2606350Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0742457U (en) | 1995-08-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |