JPH0874688A - Suction pipe mounting structure of air cleaner - Google Patents

Suction pipe mounting structure of air cleaner

Info

Publication number
JPH0874688A
JPH0874688A JP23219394A JP23219394A JPH0874688A JP H0874688 A JPH0874688 A JP H0874688A JP 23219394 A JP23219394 A JP 23219394A JP 23219394 A JP23219394 A JP 23219394A JP H0874688 A JPH0874688 A JP H0874688A
Authority
JP
Japan
Prior art keywords
cylindrical flange
suction pipe
casing
flange
pipe
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.)
Pending
Application number
JP23219394A
Other languages
Japanese (ja)
Inventor
Katsutoshi Ono
勝利 大野
Katsuya Muroi
克哉 室井
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.)
Mahle Filter Systems Japan Corp
Original Assignee
Mahle Filter Systems Japan Corp
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 Mahle Filter Systems Japan Corp filed Critical Mahle Filter Systems Japan Corp
Priority to JP23219394A priority Critical patent/JPH0874688A/en
Publication of JPH0874688A publication Critical patent/JPH0874688A/en
Pending legal-status Critical Current

Links

Landscapes

  • Exhaust Silencers (AREA)

Abstract

PURPOSE: To allow a casing to have an excellent silencing effect by constructing a suction pipe from an insertion pipe for insertion into the inner surface of the cylindrical flange of a casing and an introducing duct fitted on the outer surface of the flange, and projecting the end of the insertion pipe into the casing, the suction pipe being mounted in an opening having the cylindrical flange; and to facilitate insertion and ensure that the insertion pipe closely adheres to the cylindrical flange by providing the insertion pipe with an axial slit. CONSTITUTION: An air cleaner casing 2 is provided with an opening 6 having a cylindrical flange 5, and an insertion pipe 22 having a slit 25 is inserted into the cylindrical flange 5 and projected inwards by a length (a). Since the insertion pipe 22 closely adheres to the cylindrical flange 5 because of the elastic force of the slit 25, these members do not require any high precision machining. An introducing duct 21 for introducing outside air is fitted on the outer surface of the cylindrical flange 5, and the introducing duct 21 and the insertion pipe 22 constitute a suction pipe 23.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】この発明は内燃機関等に装着され
るエアクリーナの吸入管取付構造に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction pipe mounting structure for an air cleaner mounted on an internal combustion engine or the like.

【0002】[0002]

【従来の技術】内燃機関等に装着されるエアクリーナ
は、ケーシング本体に別体の吸入管を挿入した構造とす
る場合が多い。例えば図4のエアクリーナ1は合成樹脂
製のケーシング2を、吐出口3を有するボディ4と、筒
状フランジ5を有する開口6を設けたカバー7とで構成
し、ボディ4とカバー7との間にフィルタエレメント8
を挾持させ、クリップ9で締付けたものである。ケーシ
ング2の開口6には合成樹脂製の吸入管10が挿入さ
れ、筒状フランジ5の内面に密着するように取付けられ
る。吸入管10の取付基部の端部をケーシング2の内部
へ突出させて挿入部11を形成する。挿入部11を設け
るのは、ケーシング2を消音器として作用させ吸入側の
エンジン騒音を減衰させるのに、挿入部11が有効に作
用し消音効果が大になるからである。
2. Description of the Related Art Air cleaners mounted on internal combustion engines and the like often have a structure in which a separate suction pipe is inserted into a casing body. For example, the air cleaner 1 shown in FIG. 4 comprises a casing 2 made of synthetic resin, a body 4 having a discharge port 3 and a cover 7 having an opening 6 having a tubular flange 5, and a space between the body 4 and the cover 7. Filter element 8
It is clamped by the clip 9 and clamped. A suction pipe 10 made of synthetic resin is inserted into the opening 6 of the casing 2 and attached so as to be in close contact with the inner surface of the tubular flange 5. The insertion portion 11 is formed by projecting the end portion of the attachment base portion of the suction pipe 10 into the casing 2. The insertion portion 11 is provided because the insertion portion 11 effectively acts to attenuate the engine noise on the intake side by causing the casing 2 to act as a silencer, and the silencing effect becomes large.

【0003】[0003]

【発明が解決しようとする課題】従来の上記のような吸
入管の取付構造では、筒状フランジの内面に吸入管の外
面を正確に密着させることが困難で、取付ガタや空気洩
れを生ずる。その理由は、筒状フランジ5と吸入管10
とを共に合成樹脂で成形する場合、成形時の寸法誤差や
成形歪が生ずるからである。また筒状フランジ5は成形
時の抜き勾配として内面に先広がりのテーパが付せられ
ているが、吸入管10の外面基部に同一のテーパを付す
ることはきわめて困難である。この構造で満足すべき取
付状態を得るためには、現物合わせや、手仕上等の煩瑣
な作業を必要とする。また吸入管10の抜け出し防ぐた
め係止爪12が設けられるが、係止爪12は撓み代がな
いため、筒状フランジ5に挿入する際筒状フランジ5に
擦り傷を付け、係止爪12自体はほとんど圧損した状態
となってしまい、係止作用が不完全となる。
In the conventional suction pipe mounting structure as described above, it is difficult to accurately bring the outer surface of the suction pipe into close contact with the inner surface of the cylindrical flange, resulting in mounting play and air leakage. The reason is that the cylindrical flange 5 and the suction pipe 10 are
This is because when both and are molded with a synthetic resin, dimensional error and molding distortion occur during molding. Further, although the cylindrical flange 5 has a taper that is divergent on the inner surface as a draft at the time of molding, it is extremely difficult to form the same taper on the outer surface base portion of the suction pipe 10. In order to obtain a satisfactory mounting state with this structure, it is necessary to perform complicated work such as actual product matching and finishing. Further, a locking claw 12 is provided to prevent the suction pipe 10 from coming out, but since the locking claw 12 has no bending margin, the cylindrical flange 5 is scratched when it is inserted into the cylindrical flange 5, and the locking claw 12 itself. Is almost in a state of pressure loss, and the locking action is incomplete.

【0004】[0004]

【課題を解決するための手段】ケーシングに形成した筒
状フランジを有する開口に取付ける吸入管を、導入ダク
トと挿入管とで構成し、導入ダクトは筒状フランジの外
面に嵌め込み、挿入管は筒状フランジの内面へ挿入して
その先端をケーシング内部に突出させて挿入部を形成さ
せるとともに、挿入管には軸方向にスリットを形成し
て、スリット幅を狭めながら挿入し、弾性的に筒状フラ
ンジ内面に密着させるようにした、エアクリーナの吸入
管取付構造である。
A suction pipe attached to an opening having a cylindrical flange formed in a casing comprises an introduction duct and an insertion pipe, and the introduction duct is fitted on the outer surface of the cylindrical flange, and the insertion pipe is a cylinder. The flange is inserted into the inner surface and the tip is projected into the casing to form the insertion part, and the insertion tube is formed with a slit in the axial direction to insert it while narrowing the slit width and elastically cylindrical. It is a suction pipe mounting structure of an air cleaner that is closely attached to the inner surface of the flange.

【0005】[0005]

【作用】挿入管は復元力にもとづく弾力で筒状フランジ
内面に密着するとともに筒状フランジへの挿入も容易で
ある。また導入ダクトは筒状フランジの外面への通常の
嵌入であるから、その密着固定は容易である。すなわち
筒状フランジの外面は基部へ向って拡径する成形時の抜
き勾配を有しており、導入ダクトの先端部はわづかであ
っても弾力性を有しているから筒状フランジへ押し込む
に従ってその外面になじみ密着する。要すれば筒状フラ
ンジの外面に環状のビードを形成しておいて密着固定手
段とすることも可能である。
[Operation] The insertion tube comes into close contact with the inner surface of the tubular flange by the elastic force based on the restoring force, and can be easily inserted into the tubular flange. Further, since the introduction duct is a normal fitting to the outer surface of the tubular flange, it is easy to fix it tightly. That is, the outer surface of the tubular flange has a draft at the time of molding to expand the diameter toward the base, and even if the tip of the introduction duct is slightly elastic, it is pushed into the tubular flange. Follow the instructions to fit and adhere to the outer surface. If necessary, it is also possible to form an annular bead on the outer surface of the tubular flange and use it as a contact fixing means.

【0006】[0006]

【実施例】図1に実施例の要部を示す。エアクリーナ2
0は図4に示す従来の合成樹脂製ケーシング2の開口6
のまわりに設けた筒状フランジ5に、導入ダクト21と
挿入管22とでなる吸入管23を取付けたものである。
導入ダクト21と挿入管22とは合成樹脂製である。挿
入管22は図2のように末端にストッパ用つば24を有
しスリット25を軸方向に設けてあり、単体自由状態に
おいてその側面外径Dは筒状フランジ5の内径dよりも
大であり、図1のように筒状フランジ5に挿入されて外
径Dが内径dまで縮小されるときスリット25の幅bが
ほとんど0になるように設定される。スリット25の幅
bは、図3に示すように先端部においてb1 、末端部に
おいてb2 とし、b1 〉b2 として筒状フランジ5の内
面の抜き勾配がやや大なる状態のとき、十分に順応する
ようにすることもできる。
EXAMPLE FIG. 1 shows a main part of an example. Air cleaner 2
0 is the opening 6 of the conventional synthetic resin casing 2 shown in FIG.
A suction pipe 23 composed of an introduction duct 21 and an insertion pipe 22 is attached to a cylindrical flange 5 provided around the.
The introduction duct 21 and the insertion tube 22 are made of synthetic resin. As shown in FIG. 2, the insertion tube 22 has a stopper flange 24 at the end and is provided with a slit 25 in the axial direction, and the side surface outer diameter D is larger than the inner diameter d of the tubular flange 5 in a free state. The width b of the slit 25 is set to be almost 0 when the outer diameter D is reduced to the inner diameter d by being inserted into the tubular flange 5 as shown in FIG. As shown in FIG. 3, the width b of the slit 25 is set at b 1 at the tip end and b 2 at the end end, and b 1 > b 2 so that when the draft of the inner surface of the tubular flange 5 is slightly large, it is sufficient. You can also adapt to.

【0007】図1のように挿入管22の先端は長さaだ
けケーシング2の内面に突出し、挿入部26を形成す
る。これによりケーシング2の騒音減衰効果は図4に示
す従来のものと同様に良好に維持される。
As shown in FIG. 1, the distal end of the insertion tube 22 projects to the inner surface of the casing 2 by a length a to form an insertion portion 26. As a result, the noise damping effect of the casing 2 is maintained as good as the conventional one shown in FIG.

【0008】導入ダクト22は筒状フランジ5の外面に
押し込まれ嵌合する。筒状フランジ5は成形時の抜き勾
配を有しており、導入ダクトは合成樹脂製でわづかな弾
力性を有しているから押し込まれるにつれて筒状フラン
ジ5の外面によくなじみ密着する。要すれば筒状フラン
ジ5に環状のリブ27を付して密着性を良くするように
してもよい。この構成により筒状フランジ5、導入ダク
ト21、挿入管22の製作精度を、従来のものより緩和
して製作容易にし、かつ密着性を向上させることができ
る。
The introduction duct 22 is pushed into the outer surface of the cylindrical flange 5 and fitted therein. The tubular flange 5 has a draft at the time of molding, and since the introduction duct is made of synthetic resin and has a slight elasticity, it fits well to the outer surface of the tubular flange 5 as it is pushed. If necessary, the tubular flange 5 may be provided with an annular rib 27 to improve the adhesion. With this configuration, the manufacturing accuracy of the tubular flange 5, the introduction duct 21, and the insertion tube 22 can be relaxed as compared with the conventional one to facilitate manufacturing, and the adhesion can be improved.

【0009】上記の実施例において、導入ダクト21の
外気取入端までの長さは特に限定されるものではなく、
また途中に可撓性を持たせた蛇腹状の部分を有するもの
としてもよい。また吸入管23の取付けの向き、すなわ
ちケーシング2の開口6に対する筒状フランジ5の方向
は、必ずしも開口6に対し筒状フランジ5が垂直方向で
なく、傾斜していてもよい。さらにケーシング2の形状
やフィルタエレメント8の特性は限定されるものではな
い。
In the above embodiment, the length of the introduction duct 21 to the outside air intake end is not particularly limited,
Also, it may have a flexible bellows-shaped part in the middle thereof. Further, the mounting direction of the suction pipe 23, that is, the direction of the tubular flange 5 with respect to the opening 6 of the casing 2 is not necessarily the vertical direction of the tubular flange 5 with respect to the opening 6, and may be inclined. Furthermore, the shape of the casing 2 and the characteristics of the filter element 8 are not limited.

【0010】[0010]

【発明の効果】この発明はケーシングの開口に設けた筒
状フランジに取付ける吸入管を、外側の導入ダクトと内
側の挿入管の2個で構成し、挿入管にスリットを設けた
ので、各部材の製作精度を緩和してもなお従来以上の密
着固定性を有する取付構造となる。さらに嵌合組付け作
業も容易である。しかもケーシング内へ突出する挿入部
が存在するので従来と同じ消音効果を維持することがで
きる。
As described above, according to the present invention, the suction pipe attached to the cylindrical flange provided in the opening of the casing is composed of two introduction ducts on the outside and the insertion pipe on the inside, and the slits are provided in the insertion pipe. Even if the manufacturing accuracy of the above is relaxed, the mounting structure has a tighter fixing property than the conventional one. Further, the fitting and assembling work is easy. Moreover, since there is an insertion portion protruding into the casing, it is possible to maintain the same silencing effect as in the conventional case.

【図面の簡単な説明】[Brief description of drawings]

【図1】実施例の要部断面図。FIG. 1 is a sectional view of a main part of an embodiment.

【図2】実施例の挿入管の斜視図。FIG. 2 is a perspective view of the insertion tube of the embodiment.

【図3】実施例の他の挿入管の斜視図。FIG. 3 is a perspective view of another insertion tube according to the embodiment.

【図4】従来のエアクリーナの吸入管取付構造の断面
図。
FIG. 4 is a sectional view of a suction pipe mounting structure of a conventional air cleaner.

【符号の説明】[Explanation of symbols]

2 ケーシング 5 筒状フランジ 6 開口 21 吸入管 22 導入ダクト 23 挿入管 25 スリット 26 挿入部 2 Casing 5 Cylindrical Flange 6 Opening 21 Suction Pipe 22 Introduction Duct 23 Insertion Pipe 25 Slit 26 Insertion Part

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 ケーシングに設けた筒状フランジを有す
る開口に別体に形成した吸入管の基部を挿入し、その端
部をケーシング内に突出させて挿入部を形成したエアク
リーナの取付構造において、吸入管を筒状フランジの外
面に嵌合させる導入ダクトと、筒状フランジの内面に挿
入する挿入管とで構成し、挿入管に軸方向のスリットを
設けて挿入管外側面を筒状フランジ内面に弾性的に密着
させたことを特徴とする、エアクリーナの吸入管取付構
造。
1. An air cleaner mounting structure in which a base portion of a separately formed suction pipe is inserted into an opening having a cylindrical flange provided in a casing, and an end portion thereof is projected into the casing to form an insertion portion, It consists of an introduction duct that fits the suction pipe to the outer surface of the cylindrical flange, and an insertion tube that is inserted into the inner surface of the cylindrical flange.The insertion tube is provided with an axial slit so that the outer surface of the insertion tube is the inner surface of the cylindrical flange. A suction pipe mounting structure for an air cleaner, which is elastically adhered to the.
JP23219394A 1994-08-31 1994-08-31 Suction pipe mounting structure of air cleaner Pending JPH0874688A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23219394A JPH0874688A (en) 1994-08-31 1994-08-31 Suction pipe mounting structure of air cleaner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23219394A JPH0874688A (en) 1994-08-31 1994-08-31 Suction pipe mounting structure of air cleaner

Publications (1)

Publication Number Publication Date
JPH0874688A true JPH0874688A (en) 1996-03-19

Family

ID=16935455

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23219394A Pending JPH0874688A (en) 1994-08-31 1994-08-31 Suction pipe mounting structure of air cleaner

Country Status (1)

Country Link
JP (1) JPH0874688A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100521554B1 (en) * 2002-12-14 2005-10-17 현대자동차주식회사 Connecting apparatus for air cleaner and air duct

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100521554B1 (en) * 2002-12-14 2005-10-17 현대자동차주식회사 Connecting apparatus for air cleaner and air duct

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