JP2000018094A - Double wall structure - Google Patents
Double wall structureInfo
- Publication number
- JP2000018094A JP2000018094A JP10186427A JP18642798A JP2000018094A JP 2000018094 A JP2000018094 A JP 2000018094A JP 10186427 A JP10186427 A JP 10186427A JP 18642798 A JP18642798 A JP 18642798A JP 2000018094 A JP2000018094 A JP 2000018094A
- Authority
- JP
- Japan
- Prior art keywords
- side wall
- oil pan
- holding
- outer member
- rib
- 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
Landscapes
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、樹脂成形などの型
成形によって製造される内側部材の外側に遮音カバーな
どの外側部材を取り付けた二重壁構造に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double wall structure in which an outer member such as a sound insulating cover is attached to an outer side of an inner member manufactured by molding such as resin molding.
【０００２】[0002]
【従来の技術】エンジンのオイルパン等の薄板状の成形
品は、最初の頃は金属板で成形されていたが、現在で
は、エンジンの軽量化に伴い、繊維強化合成樹脂、又
は、アルミニウム合金やマグネシウム合金等の軽合金を
母材とする軽量の成形体で製造されているものある。2. Description of the Related Art Thin-plate molded products such as engine oil pans were formed from metal plates at the beginning, but nowadays, with the reduction in weight of engines, fiber-reinforced synthetic resins or aluminum alloys are used. And a light-weight molded body using a light alloy such as a magnesium alloy or the like as a base material.
【０００３】図６に示すような、この軽量の成形体であ
るのオイルパン２をエンジン下部に取り付ける際には、
図１１に示すように、オイルパン２のフランジ部２ｆを
ゴムパッキン24を挟んでエンジンのクランクケース３に
当接して、エンジンの振動がオイルパン２側に伝搬しな
いようにマウントバー27を介して組付けている。この時
に、フランジ部２ｆとクランクケース３との間のシール
は、ゴムパッキン24を図１１に示すように、オイルパン
２のフランジ部２ｆに形成されたパッキン溝２ｃに一部
を収納し、残りの部分がシール面より突出した状態にし
て行っている。[0003] When the oil pan 2, which is a lightweight molded body, as shown in FIG.
As shown in FIG. 11, the flange portion 2f of the oil pan 2 is brought into contact with the crankcase 3 of the engine with the rubber packing 24 interposed therebetween, so that the vibration of the engine is not transmitted to the oil pan 2 via the mount bar 27. Assembled. At this time, as shown in FIG. 11, the seal between the flange 2f and the crankcase 3 is partially accommodated in the packing groove 2c formed in the flange 2f of the oil pan 2 as shown in FIG. Are projected from the sealing surface.
【０００４】そして、このオイルパンは軽量化のために
薄肉に形成されるので、エンジンの振動によって振動し
て騒音を発生し易いため、図７に示すように、間隔Ｌを
設けて遮音カバー（外側部材）40でオイルパン（内側部
材）20を覆い、この遮音カバー40によって遮音や吸音を
行って騒音を低減している。また、この遮音カバー40と
オイルパン20との間に間隔Ｌを設けることによって、遮
音カバー40への振動の伝搬を防止している。[0004] Since the oil pan is formed thin in order to reduce the weight, the oil pan is likely to vibrate due to the vibration of the engine and generate noise. Therefore, as shown in FIG. The oil pan (inner member) 20 is covered with an outer member (40), and the sound insulation cover 40 performs sound insulation and sound absorption to reduce noise. Further, by providing an interval L between the sound insulating cover 40 and the oil pan 20, propagation of vibration to the sound insulating cover 40 is prevented.
【０００５】この遮音カバー40のオイルパン20への従来
の取付け構造は、図７に示すように、オイルパン20のフ
ランジ部20ｆに、遮音カバー40の周縁部40ｆをシールゴ
ム等の弾性シール部材42、43を重ねてボルト45で一体的
に締結している。この場合には、オイルパン20の組付け
ボルト25の外方に遮音カバー40の組付けボルト45を配置
しなければならないことから、フランジ部20ｆのエンジ
ン横方向への張出量が多くなりエンジンの幅が増加する
という問題があった。As shown in FIG. 7, a conventional mounting structure of the sound insulating cover 40 to the oil pan 20 is as follows: a peripheral portion 40f of the sound insulating cover 40 is attached to an elastic sealing member 42 such as sealing rubber on a flange portion 20f of the oil pan 20. , 43 are overlapped and integrally fastened with bolts 45. In this case, the mounting bolts 45 of the sound insulation cover 40 must be disposed outside the mounting bolts 25 of the oil pan 20, so that the flange portion 20f protrudes in the engine lateral direction and the engine There is a problem that the width of the space increases.
【０００６】これに対して、特開平７−２７９７５６号
公報に示されている取付け構造は、図８に示すように、
カバー部材41の振動低減とオイルパン21のフランジ部21
ｆの張出量を少なくするために、カバー部材41の周縁部
41ｆは、オイルパン21のフランジ21ｆ下面に取り付けた
シール部材44に当接させて、カバー部材41を底部41ｂの
固定部でオイルパン21の底部21ｂの固定部に締結するこ
とにより、このカバー部材41の周縁部41ｆをラバー部材
44に押圧して固定及びシールをしている。On the other hand, the mounting structure disclosed in Japanese Patent Application Laid-Open No. 7-279756 is, as shown in FIG.
Vibration reduction of cover member 41 and flange portion 21 of oil pan 21
In order to reduce the amount of overhang of f, the periphery of the cover member 41
The cover member 41f is brought into contact with a seal member 44 attached to the lower surface of the flange 21f of the oil pan 21 to fasten the cover member 41 to the fixed portion of the bottom portion 21b of the oil pan 21 at the fixed portion of the bottom portion 41b. Rubber material for the peripheral part 41f of 41
It is fixed and sealed by pressing on 44.
【０００７】また、実開昭５７−５８７５６号公報にお
いては、図９に示すように、シリンダヘッドカバーの内
板22を外板（遮音遮熱装置）42で覆い、内板22のフラン
ジ部22ｆに設けた弾性体55の溝55ｈ内に、外板42の周縁
部42ｆを挿入すると共に、それぞれの底部の固定部で締
結している。そして、実開昭５９−１３６４０号公報に
おいては、図１０に示すように、オイルパン23のフラン
ジ部23ｆより下のオイルパン23の側壁部23Ｗの外周にシ
ールラバー56を取り付けて、このシールラバー56の挿入
溝部56ｈに遮音構造部材43の周縁部43ｆを挿入し、更
に、周縁部43ｆの二股部分43ａでシールラバー56の挿入
溝部56ｈを形成する外側部分56ａを挟持している。そし
て、この遮音構造部材43の底部の固定部はオイルパン23
の底部の固定部に固定している。In Japanese Utility Model Laid-Open Publication No. 57-58756, the inner plate 22 of the cylinder head cover is covered with an outer plate (sound insulation device) 42 as shown in FIG. The peripheral edge 42f of the outer plate 42 is inserted into the groove 55h of the elastic body 55 provided, and is fastened by the fixed portion at the bottom of each. In Japanese Unexamined Utility Model Publication No. 59-13640, a seal rubber 56 is attached to the outer periphery of a side wall 23W of the oil pan 23 below a flange 23f of the oil pan 23 as shown in FIG. The peripheral edge 43f of the sound insulation structural member 43 is inserted into the 56 insertion groove 56h, and the outer portion 56a forming the insertion groove 56h of the seal rubber 56 is sandwiched by the forked portion 43a of the peripheral edge 43f. The fixed portion at the bottom of the sound insulation structural member 43 is
It is fixed to the fixed part at the bottom of.
【０００８】[0008]
【発明が解決しようとする課題】しかしながら、前者の
特開平７−２７９７５６号公報の二重壁構造では、カバ
ー部材の縁部をオイルパンのフランジ部又は外周部に取
り付けた弾性シール部材に当接させているだけであり、
カバー部材の縁部の固定は、カバー部材の弾性力による
弾性シール部材を挟持する力やオイルパン底部の固定部
の締結によって発生する弾性シール部材への押圧力に依
存している。However, in the former double wall structure disclosed in JP-A-7-279756, the edge of the cover member is brought into contact with the elastic seal member attached to the flange portion or the outer peripheral portion of the oil pan. Only
The fixing of the edge of the cover member depends on a force for clamping the elastic seal member by the elastic force of the cover member and a pressing force on the elastic seal member generated by fastening the fixing portion on the bottom of the oil pan.
【０００９】そのために、カバー部材の周縁部でのシー
ル及び固定支持を確実なものとするためには、カバー部
材の縁部の変形量や撓み量を考慮に入れて設計し、しか
も、弾性シール部材への押圧力を維持できるように、底
部の固定部における締結力を大きくする必要がある。し
かし、これらのカバー部材自体も軽量化のために薄板状
に作られることが多く、剛性が比較的弱くなって撓み易
くなっており、弾性力が低下する。その上、カバー部材
の縁部における押圧力を高めるために、カバー部材の底
面の締結部における締結力を大きくすると、それに伴っ
て、この固定部の構造を強化する必要が生じ、そのた
め、この固定部を厚肉に形成する必要が生じる。Therefore, in order to ensure the sealing and fixed support at the peripheral edge of the cover member, the cover member is designed in consideration of the amount of deformation and deflection of the edge portion of the cover member, and furthermore, the elastic seal is required. In order to maintain the pressing force on the member, it is necessary to increase the fastening force at the fixed portion at the bottom. However, these cover members themselves are often made of a thin plate in order to reduce the weight, and have relatively low rigidity and are easily bent, and the elastic force is reduced. In addition, when the fastening force at the fastening portion on the bottom surface of the cover member is increased in order to increase the pressing force at the edge of the cover member, it is necessary to strengthen the structure of the fixing portion. It is necessary to form the part thick.
【００１０】しかしながら、全体形状をシート状の材料
から成形するＳＭＣ（シートモールディングコンポジッ
ト）工法等によって、全体が薄板状に成形される型成形
品等の場合には、十分な強度を持たせながらこの肉厚部
分を作るのが難しく、また、工程や型が複雑化するとい
う問題がある。また、後者の実開昭５７−５８７５６号
公報及び実開昭５９−１３６４０号公報の二重壁構造で
は、外側部材の縁部を内側部材のフランジ部又は外周部
に取り付けた弾性部材の溝内に挿入させているだけであ
り、外側部材の縁部の固定は、弾性部材の弾性挟持力に
依存している。However, in the case of a molded article or the like whose entire shape is formed into a thin plate by the SMC (sheet molding composite) method or the like in which the entire shape is formed from a sheet-like material, it is necessary to provide a sufficient strength while providing sufficient strength. There is a problem that it is difficult to form a thick portion and the process and the mold are complicated. Further, in the latter double wall structure disclosed in Japanese Utility Model Laid-Open Nos. 57-58756 and 59-13640, the edge of the outer member is formed in a groove of an elastic member attached to the flange portion or the outer peripheral portion of the inner member. The fixing of the edge of the outer member depends on the elastic clamping force of the elastic member.
【００１１】そのため、外側部材の周縁部が弾性部材の
弾性力だけで挟持されて固定支持されることになるの
で、外側部材の固定が不十分となり、外側部材の振動を
十分に低減することができず、騒音対策が不十分になる
という問題がある。本発明は、上述の問題を解決するた
めになされたものであり、その目的は、内側部材の略全
体を間隔を設けて覆う外側部材を取り付ける時に、内側
部材で外側部材の周縁部を把持して外側部材の周縁部に
おける拘束力を大きくすることができ、しかも、組付け
が容易で、かつ、構造が比較的単純な二重壁構造を提供
することにある。Therefore, the peripheral portion of the outer member is sandwiched and fixed and supported only by the elastic force of the elastic member. Therefore, the fixing of the outer member becomes insufficient, and the vibration of the outer member can be sufficiently reduced. There is a problem that the noise countermeasures become insufficient. SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and an object of the present invention is to attach an outer member that covers substantially the entire inner member at intervals and hold the outer edge of the outer member with the inner member. Accordingly, it is an object of the present invention to provide a double wall structure which can increase the binding force at the peripheral edge of the outer member, is easy to assemble, and has a relatively simple structure.
【００１２】[0012]
【課題を解決するための手段】以上のような目的を達成
するための二重壁構造は、次のように構成される。 １）側壁部と底部とを有する内側部材の外側に間隔を設
けて覆う外側部材を配置した二重壁構造であって、該外
側部材の底部の固定部を、前記内側部材の底部の固定部
において締結すると共に、該外側部材の周縁部を前記内
側部材の側壁部に形成した把持部内に圧挿して、該外側
部材を前記内側部材に取り付けることを特徴とする。The double wall structure for achieving the above object is constituted as follows. 1) A double-walled structure in which an outer member that covers the inner member having a side wall and a bottom is provided at an interval outside the inner member, and the fixing part at the bottom of the outer member is a fixing part at the bottom of the inner member. And attaching the outer member to the inner member by pressing the peripheral portion of the outer member into a holding portion formed on the side wall of the inner member.
【００１３】合成樹脂製や鉄・アルミ等の金属製の薄板
状のオイルパン等の内側部材の略全体に、外側部材（カ
バー部材）を所定の間隔を置いて取り付けて覆って二重
壁構造にする場合において、それぞれの底部の固定部で
両者を締結すると共に、弾性シール部材（シールラバ
ー）により縁取りされた外側部材の周縁部を、内側部材
の側壁部に一体成形された把持部に圧挿して、この把持
部によって外側部材の周縁部を弾性シール部材と共に挟
持することにより、外側部材をその周縁部と底部の固定
部とで固定支持する。An outer member (cover member) is attached to a substantially entire inner member such as a thin oil pan made of a synthetic resin or a metal such as iron or aluminum and the like at a predetermined interval to cover the inner member. In this case, the two parts are fastened to each other at the fixed portions at the bottoms, and the peripheral edge of the outer member, which is edged by the elastic seal member (seal rubber), is pressed against the grip portion integrally formed on the side wall portion of the inner member. The outer member is fixedly supported by the peripheral portion and the bottom fixing portion by inserting and holding the peripheral portion of the outer member together with the elastic sealing member by the grip portion.
【００１４】この把持部は、通常は側壁部に設けられた
フランジ部の下面に設けられるが、フランジ部の周辺や
フランジ部より底部側の側壁部に設けてもよい。以上の
構成により、内側部材と外側部材の底部の固定部におい
ては、従来技術のように成形体のフランジ部に取り付け
た弾性シール部材にカバー部材の周縁部を押圧する必要
がなくなるので、この押圧のための過度の締結力が必要
がなくなる。つまり、底部の固定部における締結力は外
側部材がしっかり止まっている程度の強さでよくなるの
で、この部分の強度が小さくて済み構造的に楽になり、
肉厚を極度に厚くする必要がなくなる。The grip portion is usually provided on the lower surface of the flange portion provided on the side wall portion, but may be provided on the periphery of the flange portion or on the side wall portion on the bottom side from the flange portion. With the above configuration, in the fixing portion at the bottom of the inner member and the outer member, it is not necessary to press the peripheral portion of the cover member against the elastic seal member attached to the flange portion of the molded body as in the related art. This eliminates the need for excessive fastening force. In other words, the fastening force at the fixed portion at the bottom can be increased to the extent that the outer member is firmly stopped, so the strength of this portion is small and the structure is easy,
It is not necessary to make the wall thickness extremely large.
【００１５】また、外側部材の周縁部を内側部材に設け
た把持部に圧入して挟持させることにより、外側部材に
対する拘束力が高まるので、振動が低減し騒音防止効果
が向上する。[0015] Further, since the outer peripheral member is press-fitted into the grip portion provided on the inner member and pinched, the restraining force against the outer member is increased, so that vibration is reduced and the noise prevention effect is improved.
【００１６】２）更に、前記把持部は前記側壁部に設け
られたフランジ部と一体的に形成された挟持用リブと補
強用リブとからなり、前記挟持用リブは前記側壁部に沿
って並行に形成し、前記補強用リブは前記挟持用リブに
対して略垂直方向に前記挟持用リブと前記側壁部とを連
結して形成し、前記外側部材を前記弾性シール部材と共
に前記挟持用リブの先端側から前記挟持用リブと前記側
壁部との間に圧挿して固定支持することを特徴とする。2) Further, the grip portion includes a holding rib and a reinforcing rib integrally formed with a flange portion provided on the side wall portion, and the holding ribs are parallel along the side wall portion. The reinforcing rib is formed by connecting the holding rib and the side wall portion in a direction substantially perpendicular to the holding rib, and the outer member is formed of the holding rib together with the elastic seal member. It is characterized in that it is press-fitted and fixedly supported between the holding rib and the side wall from the tip side.
【００１７】以上の構成によれば、把持部を構成する挟
持用リブの端部に補強用リブを設けて挟持用リブ両端を
閉塞して補強するようにし、外側部材の周縁部を挿入す
る側のみが開口するボックス型の構造としたことで、挟
持用リブの強度を向上させることができるので、把持部
の数を少なくすることができる。また、比較的簡単な構
造となるので、ＳＭＣ工法においても型成形で把持部を
形成できる。According to the above construction, reinforcing ribs are provided at the ends of the holding ribs constituting the gripping portions so that both ends of the holding ribs are closed to reinforce, and the side into which the peripheral edge of the outer member is inserted. By adopting the box-type structure in which only the opening is opened, the strength of the holding rib can be improved, so that the number of gripping portions can be reduced. In addition, since the structure is relatively simple, the gripping portion can be formed by molding in the SMC method.
【００１８】また、外側部材の周縁部を、内側部材の側
壁部をガイドにして、これに沿わせながら移動させるこ
とにより、把持部の挟持用リブと側壁部との間に圧挿し
て挟持させることができるので、取付け作業が非常に容
易となる。Further, by moving the peripheral portion of the outer member along the side wall portion of the inner member while using it as a guide, the outer peripheral member is pressed and held between the holding rib of the holding portion and the side wall portion. The mounting work becomes very easy.
【００１９】３）また、具体的な対象物を例示すると、
前記型成形体は型成形により樹脂成形されるオイルパン
であり、前記カバー部材は遮音カバーである。特にＳＭ
Ｃ工法により型成形された樹脂製のオイルパンの場合に
は、補強用材料を混錬した一定厚さのシート状の素材か
ら、オイルパンを型成形するために、一般的に均一の強
度を保ちながら、肉厚を自由に変化することが難しいの
で、比較的肉薄で形成できる、この二重壁構造が効果を
奏することになり、特に把持部をボックス型の形状にす
ると、この把持部の数も少なくて済むので特に効果があ
る。3) In addition, as an example of a specific object,
The molded body is an oil pan formed by resin molding by molding, and the cover member is a sound insulating cover. Especially SM
In the case of a resin oil pan molded by the C method, in order to mold the oil pan from a sheet material having a constant thickness kneaded with a reinforcing material, the oil pan generally has a uniform strength. Since it is difficult to freely change the wall thickness while maintaining, this double-walled structure, which can be formed relatively thin, has an effect. In particular, when the box is shaped like a box, This is particularly effective because the number is small.
【００２０】また、この例のオイルパンと遮音カバー以
外にも例えば、シリンダヘッドカバーに設けられる遮音
カバー等同様な構造を有する他の数多くの部品、製品に
適用できる。In addition to the oil pan and the sound insulating cover of this embodiment, the present invention can be applied to many other components and products having the same structure, such as a sound insulating cover provided on a cylinder head cover.
【００２１】[0021]
【発明の実施の形態】以下、図面を用いて、本発明の実
施の形態を説明する。本発明に係る二重壁構造につい
て、図６に示すようなエンジンのオイルパン（内側部
材）２を遮音カバー（外側部材）４で覆う二重壁構造を
例にして説明する。Embodiments of the present invention will be described below with reference to the drawings. The double wall structure according to the present invention will be described by taking a double wall structure in which an oil pan (inner member) 2 of an engine is covered with a sound insulation cover (outer member) 4 as shown in FIG.
【００２２】このオイルパン２は樹脂製の型成形体であ
り、図６に示すように、オイルパン２を構成する底部２
ｂと側壁部２Ｗとエンジン下部に取り付けるためのフラ
ンジ部２ｆとを有して形成される。このフランジ部２ｆ
は側壁部２Ｗの端部に断面Ｌ字形状に張り出して形成さ
れると共に、取付け面にはゴムパッキン４を挿嵌するた
めのパッキン溝２ｃと、組付けボルト25を挿通するため
のボルト孔２ｈとが設けられる。The oil pan 2 is a molded body made of a resin, and as shown in FIG.
b, a side wall 2W, and a flange 2f to be attached to the lower part of the engine. This flange 2f
Is formed so as to protrude in an L-shaped cross section at the end of the side wall portion 2W, and has a packing groove 2c for inserting a rubber packing 4 on a mounting surface, and a bolt hole 2h for inserting an assembly bolt 25. Are provided.
【００２３】そして、図１〜図５に示すように、側壁部
２Ｗに形成されたフランジ部２ｆの下側に把持部７を設
け、この把持部７は、挟持用リブ７ｒと補強用リブ７ｓ
とからなり、型成形時にこのフランジ部２ｆと一体的に
形成される。この挟持用リブ７ｒは側壁部２Ｗに沿って
並行に形成して、側壁部２Ｗとの間に、遮音カバー４を
シールラバー（弾性シール部材）５と共に圧挿するため
の挿入溝７ｈを形成する。As shown in FIGS. 1 to 5, a grip 7 is provided below the flange 2f formed on the side wall 2W. The grip 7 is provided with a holding rib 7r and a reinforcing rib 7s.
And is formed integrally with the flange portion 2f during molding. The holding rib 7r is formed in parallel along the side wall 2W, and an insertion groove 7h for press-fitting the sound insulation cover 4 together with the seal rubber (elastic sealing member) 5 is formed between the holding rib 7r and the side wall 2W. .
【００２４】また、補強用リブ７ｓは挟持用リブ７ｒに
対して略垂直方向に設けられ、挟持用リブ７ｒの両端側
と側壁部２Ｗとを連結して形成し、挟持用リブ７ｒを補
強する。また、この補強用リブ７ｓの外側端部即ちフラ
ンジ部２ｆの先端側に、側壁部２Ｗに並行する並行リブ
７ｊを設けて、多少ながら補強用リブ７ｓを更に補強し
て構成する。The reinforcing rib 7s is provided substantially perpendicular to the holding rib 7r, and is formed by connecting both ends of the holding rib 7r to the side wall 2W to reinforce the holding rib 7r. . A parallel rib 7j parallel to the side wall 2W is provided on the outer end of the reinforcing rib 7s, that is, on the tip side of the flange 2f, to further reinforce the reinforcing rib 7s to some extent.
【００２５】この把持部７の形状は、図２に示すように
矢印Ｔ側から遮音カバー４のシールラバー５を装着した
周縁部４ｆをそのシールラバー５を被せたまま圧挿する
ことができて、この周縁部４ｆをシールラバー５を介し
て挟持できる構造であればよい。また、部分的に、シー
ルラバー５を切り欠いて、把持部７で周縁部４ｆを直接
挟持してもよい。この場合には、堅固に固定支持できる
が、オイルパン２からの振動が伝搬され易くなる。As shown in FIG. 2, the shape of the grip 7 is such that the peripheral edge 4f of the sound insulating cover 4 on which the seal rubber 5 is mounted can be pressed from the arrow T side while the seal rubber 5 is being covered. Any structure may be used as long as the peripheral portion 4f can be sandwiched via the seal rubber 5. Alternatively, the seal rubber 5 may be partially cut out, and the peripheral portion 4f may be directly held by the grip portion 7. In this case, although it can be firmly fixed and supported, the vibration from the oil pan 2 is easily transmitted.
【００２６】また、オイルパン２の底部２Ｂに固定部２
ｂを設けるが、この固定部２ｂには厚肉部２ｔを形成
し、この厚肉部２ｔに組付けボルト10を螺合するための
雌ネジ部を有するボルト孔２ｄを形成する。一方、外側
部材である遮音カバー４は、オイルパン２との間に所定
の間隔Ｌ、Ｌ’をおいて全体的に覆うことができる形状
に形成され、底部４Ｂの固定部４ｂに組付けボルト用の
孔を有し、この孔の全周に渡ってシールラバー12を設
け、更にこのシールラバー12を座金11と13とで挟んで、
組付けボルト10によりシールラバー12を介して遮音カバ
ー４の固定部４ｂを固定できるように構成する。The fixed portion 2 is attached to the bottom 2 B of the oil pan 2.
The fixing portion 2b is provided with a thick portion 2t, and a bolt hole 2d having a female screw portion for screwing the assembling bolt 10 to the thick portion 2t is formed. On the other hand, the sound insulation cover 4, which is an outer member, is formed in a shape that can be entirely covered with a predetermined interval L, L 'between itself and the oil pan 2, and is attached to the fixing portion 4b of the bottom 4B. For the seal, providing a seal rubber 12 over the entire circumference of this hole, further sandwiching the seal rubber 12 between washers 11 and 13,
The fixing portion 4b of the sound insulation cover 4 can be fixed via the seal rubber 12 by the mounting bolt 10.
【００２７】次に、以上の構成のオイルパン２と遮音カ
バー４の組付けについて説明する。先ず、このオイルパ
ン２をエンジン下部に取り付ける際には、図２に示すよ
うに、オイルパン２のフランジ部２ｆのパッキン溝２ｃ
にゴムパッキン24の一部を収納して、図１１に示すよう
にエンジンのクランクケース３に当接させ、エンジンの
振動がオイルパン２側に伝搬しないようにマウントバー
27と座金26を介して、ボルト孔２ｈに組付けボルト25を
挿通して組付ける。Next, the assembly of the oil pan 2 and the sound insulating cover 4 having the above-described configuration will be described. First, when attaching the oil pan 2 to the lower part of the engine, as shown in FIG.
A part of the rubber packing 24 is housed in the housing and is brought into contact with the crankcase 3 of the engine as shown in FIG.
The assembly bolt 25 is inserted into the bolt hole 2h via the washer 27 and the washer 26, and assembled.
【００２８】この時、クランクケース３とフランジ部２
ｆとの間のシールはパッキン溝２ｃに収納されたゴムパ
ッキン24によって行われる。そして、エンジンの振動の
伝搬によってオイルパン２から発生する騒音を低減する
ために、このオイルパン２の外側に所定の距離Ｌ、Ｌ’
を有して、遮音カバー４を取り付けてオイルパン２の全
体を覆う。At this time, the crankcase 3 and the flange 2
The seal with the seal f is performed by the rubber packing 24 housed in the packing groove 2c. Then, in order to reduce noise generated from the oil pan 2 due to propagation of engine vibration, predetermined distances L and L ′ are provided outside the oil pan 2.
The sound insulation cover 4 is attached to cover the entire oil pan 2.
【００２９】この時に、遮音カバー４の周縁部４ｆにシ
ールラバー５を装着し、周縁部４ｆをシールラバー５で
包んだ状態にしたまま、側壁部２Ｗに沿わせて、図の下
側から矢印Ｔ方向に押し上げて、オイルパン２のフラン
ジ部２ｆ下面に設けた複数の把持部７の挿入溝７ｈに圧
挿し、把持部７の弾性力により周縁部４ｆをシールラバ
ー５と共に、側壁部２Ｗと挟持用リブ７ｒとで挟持す
る。At this time, the seal rubber 5 is attached to the peripheral edge 4f of the sound insulation cover 4, and the peripheral edge 4f is wrapped by the seal rubber 5, and along the side wall 2W, an arrow is drawn from the lower side in the figure. Push up in the T direction, press-fit into the insertion grooves 7h of the plurality of gripping parts 7 provided on the lower surface of the flange part 2f of the oil pan 2, and use the elastic force of the gripping parts 7 to separate the peripheral edge 4f together with the seal rubber 5 with the side wall 2W. It is held between the holding ribs 7r.
【００３０】この時の挟持するための力は、挟持用リブ
７ｒの弾性変形力とシールラバー５の弾性変形力から生
じ、シールラバー５だけによる弾性変形力より遙に大き
くなるので、堅固に遮音カバー４の周縁部４ｆを固定支
持できる。また、オイルパン２の底部２Ｂの固定部２ｂ
に、遮音カバー４の底部４Ｂの固定部４ｂを当接し、組
付けボルト10をシールラバー12を挿通して、ボルト孔２
ｄに螺合して、両固定部２ｂ、４ｂを締結する。The force for clamping at this time is generated from the elastic deformation force of the clamping ribs 7r and the elastic deformation force of the seal rubber 5, and is much larger than the elastic deformation force of the seal rubber 5 alone. The peripheral portion 4f of the cover 4 can be fixedly supported. In addition, the fixed portion 2b of the bottom 2B of the oil pan 2
Then, the fixing portion 4b of the bottom portion 4B of the sound insulation cover 4 is brought into contact with the fixing portion 4b, and the assembling bolt 10 is inserted through the sealing rubber 12, so that the bolt hole 2
d, and the two fixing portions 2b, 4b are fastened.
【００３１】以上の構成の二重壁構造によれば、合成樹
脂製や鉄・アルミ等の金属製の薄板状の型成形体からな
るオイルパン２に、所定の間隔Ｌ、Ｌ’を設けて遮音カ
バー４を取り付けて二重壁構造を形成する時に、遮音カ
バー４の周縁部４ｆをこのオイルパン２に形成した把持
部７に圧挿して挟持させて、遮音カバー４をその周縁部
４ｆと底部４Ｂの固定部４ｂとで固定することにより、
遮音カバー４の拘束力を高めることができるので、遮音
カバー４の振動を防止しながらオイルパン２から発する
騒音を効率よく低減でき、騒音防止効果を向上すること
ができる。According to the double wall structure having the above-described structure, predetermined intervals L and L 'are provided in the oil pan 2 formed of a thin plate-shaped molded product made of a synthetic resin or a metal such as iron or aluminum. When the sound insulating cover 4 is attached to form a double wall structure, the peripheral portion 4f of the sound insulating cover 4 is pressed into the holding portion 7 formed on the oil pan 2 so as to be sandwiched, and the sound insulating cover 4 is connected to the peripheral portion 4f. By fixing with the fixing part 4b of the bottom part 4B,
Since the restraining force of the sound insulation cover 4 can be increased, the noise generated from the oil pan 2 can be efficiently reduced while preventing the vibration of the sound insulation cover 4, and the noise prevention effect can be improved.
【００３２】また、オイルパン２に側壁部２Ｗをガイド
にして、遮音カバー４の周縁部４ｆをこれに沿わせなが
ら移動して、把持部７の挟持用リブ７ｒと側壁部４Ｗと
の間の挿入溝７ｈ内に圧挿して、この把持部７で遮音カ
バー４の周縁部４ｆを固定支持させることができるの
で、取付けが非常に容易となる。そして、この把持部７
の構造も挟持用リブ７ｒと補強用リブ７ｓとで形成でき
るので、比較的簡単な構造となり、ＳＭＣ工法において
も型成形で簡単に把持部７を形成できる。Further, with the side wall 2W being guided by the oil pan 2, the peripheral edge 4f of the sound insulation cover 4 is moved along the same to move the sound insulation cover 4 between the holding rib 7r of the grip 7 and the side wall 4W. Since the peripheral portion 4f of the sound insulating cover 4 can be fixedly supported by the holding portion 7 by being pressed into the insertion groove 7h, the mounting becomes very easy. And, this holding part 7
Can also be formed by the holding ribs 7r and the reinforcing ribs 7s, so that the structure becomes relatively simple, and the gripping portion 7 can be easily formed by molding even in the SMC method.
【００３３】その上、遮音カバー４の底部４Ｂの固定部
４ｂにおける締結力を大きくする必要がなくなるため
に、オイルパン２の底部２Ｂの固定部２ｂの肉厚部２ｔ
を過度に厚く形成する必要がなくなるので制作が容易と
なる。In addition, since it is not necessary to increase the fastening force at the fixing portion 4b of the bottom 4B of the sound insulating cover 4, the thick portion 2t of the fixing portion 2b of the bottom 2B of the oil pan 2 is eliminated.
Since it is not necessary to form an excessively thick layer, production becomes easy.
【００３４】[0034]
【発明の効果】以上説明したように、本発明による二重
壁構造によれば、オイルパン等の内側部材に、所定の間
隔を設けて遮音カバー等の外側部材を取り付けて二重壁
構造を形成する時に、外側部材の周縁部をこの内側部材
に形成した把持部に圧挿して挟持させて、外側部材をそ
の周縁部と底部の固定部とで固定することにより、外側
部材の拘束力を高めることができるので、外側部材の振
動を防止しながら内側部材から発する騒音を効率よく低
減でき、騒音防止効果を向上することができる。As described above, according to the double wall structure according to the present invention, an outer member such as a sound insulation cover is attached to an inner member such as an oil pan at a predetermined interval. At the time of forming, the outer peripheral member is pressed and inserted into the grip portion formed on the inner member to be clamped, and the outer member is fixed by the peripheral portion and the fixing portion at the bottom, so that the restraining force of the outer member is reduced. Since the noise can be increased, the noise generated from the inner member can be efficiently reduced while preventing the vibration of the outer member, and the noise prevention effect can be improved.
【００３５】また、内側部材の側壁部をガイドにして、
外側部材の周縁部をこれに沿わせながら移動して、把持
部の挟持用リブと側壁部との間に圧挿して、この把持部
で外側部材の周縁部を固定支持させることができるの
で、取付けが非常に容易となる。そして、この把持部の
構造も挟持用リブと補強用リブとで形成できるので、比
較的簡単な構造となり、ＳＭＣ工法においても型成形で
簡単に把持部を形成できる。Further, using the side wall of the inner member as a guide,
Since the outer edge of the outer member is moved while being moved along the outer edge of the outer member, the outer edge of the outer member can be fixedly supported by the gripping portion by pressing the outer edge of the outer member between the holding rib and the side wall. Installation becomes very easy. And since the structure of this grip part can also be formed by the rib for holding and the rib for reinforcement, it becomes a comparatively simple structure, and a grip part can be easily formed by die molding also in SMC construction method.
【００３６】その上、外側部材及び内側部材の底部の固
定部における締結力を大きくする必要がなくなるため
に、内側部材の底部の固定部の肉厚を過度に厚く形成す
る必要がなくなるので制作が容易となる。In addition, since it is not necessary to increase the fastening force at the fixed portions at the bottoms of the outer member and the inner member, it is not necessary to make the thickness of the fixed portions at the bottom of the inner member excessively thick. It will be easier.
【図１】本発明に係る二重壁構造の組付け後を示す一部
断面を含む部分斜視図である。FIG. 1 is a partial perspective view including a partial cross section showing a double wall structure according to the present invention after being assembled.
【図２】本発明に係る二重壁構造の組付け前を示す一部
断面を含む部分斜視図である。FIG. 2 is a partial perspective view including a partial cross section showing a double wall structure according to the present invention before being assembled.
【図３】本発明に係る把持部を示す部分正面図である。FIG. 3 is a partial front view showing a grip portion according to the present invention.
【図４】図３のＡ−Ａ断面を示す部分側面図である。FIG. 4 is a partial side view showing an AA cross section of FIG. 3;
【図５】図３のＢ−Ｂ断面を示す部分側面図である。FIG. 5 is a partial side view showing a BB cross section of FIG. 3;
【図６】オイルパンを示す斜視図である。FIG. 6 is a perspective view showing an oil pan.
【図７】従来技術の二重壁構造を示す模式的断面図であ
る。FIG. 7 is a schematic sectional view showing a conventional double wall structure.
【図８】従来技術の他の例の二重壁構造を示す模式的断
面図である。FIG. 8 is a schematic cross-sectional view showing another example of a double-walled structure of the prior art.
【図９】従来技術の他の例の二重壁構造を示す模式的断
面図である。FIG. 9 is a schematic cross-sectional view showing another example of a double wall structure of the prior art.
【図１０】従来技術の他の例の二重壁構造を示す模式的
断面図である。FIG. 10 is a schematic cross-sectional view showing another example of a double wall structure of the prior art.
【図１１】オイルパンとクランクケースとの取付け状態
を示すフランジ部の組付けボルト部分の側断面図であ
る。FIG. 11 is a side cross-sectional view of an assembly bolt portion of a flange portion showing an attachment state between an oil pan and a crankcase.
２、20、21、22、23 内側部材（オイルパン） ２Ｂ 底部 ２Ｗ 側壁部 ２ｂ、21ｂ 固定部 ２ｃ パッキン溝 ２ｄ、２ｈ ボルト孔 ２ｆ、20ｆ、21ｆ、22ｆ、
23ｆ フランジ部 ２ｔ 肉厚部 ３ クランクケース ４、40、41、42、43 外側部材（遮音カバー） ４Ｂ 底部 ４ｂ、41ｂ 固定部 ５、52、53、54、55、56 弾性シール部材（シールラバ
ー） ７ 把持部 ７ｈ 挿入溝 ７ｉ 切欠き部 ７ｒ 挟持用リブ ７ｓ 補強用リブ ７ｊ 平行リブ 10、25、45 組付けボルト 11、13、26 座金 12 シールラバー 24 ゴムパッキン 27 マウントラバー2, 20, 21, 22, 23 Inside member (oil pan) 2B Bottom 2W Side wall 2b, 21b Fixed part 2c Packing groove 2d, 2h Bolt hole 2f, 20f, 21f, 22f,
23f Flange part 2t Thick part 3 Crank case 4, 40, 41, 42, 43 Outer member (sound insulation cover) 4B Bottom part 4b, 41b Fixed part 5, 52, 53, 54, 55, 56 Elastic seal member (seal rubber) 7 Grip 7h Insertion groove 7i Notch 7r Nipping rib 7s Reinforcing rib 7j Parallel rib 10, 25, 45 Assembling bolts 11, 13, 26 Washer 12 Seal rubber 24 Rubber packing 27 Mount rubber
Claims (3)
に間隔を設けて覆う外側部材を配置した二重壁構造であ
って、該外側部材の底部の固定部を、前記内側部材の底
部の固定部において締結すると共に、該外側部材の周縁
部を前記内側部材の側壁部に形成した把持部内に圧挿し
て、該外側部材を前記内側部材に取り付けることを特徴
とする二重壁構造。1. A double-walled structure in which an outer member that covers at an interval is provided outside an inner member having a side wall portion and a bottom portion, wherein a fixing portion of a bottom portion of the outer member is fixed to a bottom portion of the inner member. Wherein the outer member is attached to the inner member by press-fitting a peripheral portion of the outer member into a holding portion formed on a side wall of the inner member.
ランジ部と一体的に形成された挟持用リブと補強用リブ
とからなり、前記挟持用リブは前記側壁部に沿って並行
に形成し、前記補強用リブは前記挟持用リブに対して略
垂直方向に前記挟持用リブと前記側壁部とを連結して形
成し、前記外側部材を前記弾性シール部材と共に前記挟
持用リブの先端側から前記挟持用リブと前記側壁部との
間に圧挿して固定支持することを特徴とする請求項１記
載の二重壁構造。2. The holding portion comprises a holding rib and a reinforcing rib integrally formed with a flange portion provided on the side wall portion, and the holding rib is formed in parallel along the side wall portion. The reinforcing rib is formed by connecting the holding rib and the side wall portion in a direction substantially perpendicular to the holding rib, and the outer member together with the elastic sealing member is provided at a tip side of the holding rib. 2. The double wall structure according to claim 1, wherein the support is fixedly supported by press-fitting between the holding rib and the side wall portion.
れるオイルパンであり、前記外側部材は遮音カバーであ
る請求項１又は２に記載の二重壁構造。3. The double wall structure according to claim 1, wherein the inner member is an oil pan formed by resin molding by molding, and the outer member is a sound insulating cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18642798A JP3765184B2 (en) | 1998-07-01 | 1998-07-01 | Double wall structure of engine oil pan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18642798A JP3765184B2 (en) | 1998-07-01 | 1998-07-01 | Double wall structure of engine oil pan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000018094A true JP2000018094A (en) | 2000-01-18 |
| JP3765184B2 JP3765184B2 (en) | 2006-04-12 |
Family
ID=16188247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18642798A Expired - Fee Related JP3765184B2 (en) | 1998-07-01 | 1998-07-01 | Double wall structure of engine oil pan |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3765184B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006039355A1 (en) * | 2006-08-22 | 2008-03-13 | Reinz-Dichtungs-Gmbh | Cylinder head cover for internal combustion engine has seal arranged in first peripheral groove along connecting line of upper and lower shells, each of which forms lateral leg of first groove |
| JP2009209985A (en) * | 2008-03-03 | 2009-09-17 | Daihatsu Motor Co Ltd | Sealing device in bolt for fastening synthetic resin-made enclosure |
| JP2009236091A (en) * | 2008-03-28 | 2009-10-15 | Mazda Motor Corp | Sound insulating device for vehicle engine |
-
1998
- 1998-07-01 JP JP18642798A patent/JP3765184B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006039355A1 (en) * | 2006-08-22 | 2008-03-13 | Reinz-Dichtungs-Gmbh | Cylinder head cover for internal combustion engine has seal arranged in first peripheral groove along connecting line of upper and lower shells, each of which forms lateral leg of first groove |
| JP2009209985A (en) * | 2008-03-03 | 2009-09-17 | Daihatsu Motor Co Ltd | Sealing device in bolt for fastening synthetic resin-made enclosure |
| JP2009236091A (en) * | 2008-03-28 | 2009-10-15 | Mazda Motor Corp | Sound insulating device for vehicle engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3765184B2 (en) | 2006-04-12 |
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