JP2004340114A - Muffler support device - Google Patents

Muffler support device Download PDF

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Publication number
JP2004340114A
JP2004340114A JP2003140998A JP2003140998A JP2004340114A JP 2004340114 A JP2004340114 A JP 2004340114A JP 2003140998 A JP2003140998 A JP 2003140998A JP 2003140998 A JP2003140998 A JP 2003140998A JP 2004340114 A JP2004340114 A JP 2004340114A
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JP
Japan
Prior art keywords
muffler
plate
support device
outer peripheral
peripheral 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.)
Pending
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JP2003140998A
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Japanese (ja)
Inventor
Taisuke Nemoto
泰典 根本
Masao Nishimura
正雄 西村
Seiji Igarashi
政治 五十嵐
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Hitachi Construction Machinery Co Ltd
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Hitachi Construction Machinery Co Ltd
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Publication date
Application filed by Hitachi Construction Machinery Co Ltd filed Critical Hitachi Construction Machinery Co Ltd
Priority to JP2003140998A priority Critical patent/JP2004340114A/en
Publication of JP2004340114A publication Critical patent/JP2004340114A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1838—Construction facilitating manufacture, assembly, or disassembly characterised by the type of connection between parts of exhaust or silencing apparatus, e.g. between housing and tubes, between tubes and baffles
    • F01N13/1844—Mechanical joints
    • F01N13/1855—Mechanical joints the connection being realised by using bolts, screws, rivets or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B9/00—Connections of rods or tubular parts to flat surfaces at an angle
    • F16B9/02—Detachable connections
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K13/00—Arrangement in connection with combustion air intake or gas exhaust of propulsion units
    • B60K13/04—Arrangement in connection with combustion air intake or gas exhaust of propulsion units concerning exhaust
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/0858—Arrangement of component parts installed on superstructures not otherwise provided for, e.g. electric components, fenders, air-conditioning units
    • E02F9/0866—Engine compartment, e.g. heat exchangers, exhaust filters, cooling devices, silencers, mufflers, position of hydraulic pumps in the engine compartment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/40—Special vehicles
    • B60Y2200/41—Construction vehicles, e.g. graders, excavators
    • B60Y2200/412—Excavators
    • F16B9/026—

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Transportation (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Exhaust Silencers (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To stably support a muffler even when outer diameter size of the muffler is changed. <P>SOLUTION: Two muffler support rods 23A and 23A are provided on a rod body 23 of this muffler support device 21. The muffler support rods 23A respectively get in linear contact with an outer circumferential surface of a cylinder part 12A composing the muffler 12 to support the muffler 12 in a linear contact state. In a case of supporting the muffler 12' that is smaller than the muffler 12 in outer diameter size, the muffler support rods 23A and 23A can be respectively put to get in linear contact with the outer circumferential surface of the cylinder part of the muffler 12', so that the muffler 12' can be stably supported by the muffler support rods 23A respectively. Even when the outer diameter size of the muffler to be supported is changed, therefore, the muffler can be stably supported by the muffler support device 21. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、例えば建設機械、産業機械、自動車等に搭載される原動機のマフラを支持するのに好適に用いられるマフラ支持装置に関する。
【０００２】
【従来の技術】
一般に、建設機械、産業機械、自動車等の各種の機械は、動力源としてエンジン等の原動機を搭載している。そして、油圧ショベル、油圧クレーン等の建設機械は、エンジンによって油圧ポンプを駆動し、この油圧ポンプから吐出した圧油を走行装置、旋回装置、作業装置等の油圧アクチュエータに供給することにより、下部走行体の走行動作、上部旋回体の旋回動作、作業装置を用いた土砂等の掘削作業等を行う構成となっている。
【０００３】
ところで、油圧ショベル等に搭載されたエンジンの排気管には、通常、マフラが設けられ、このマフラは、エンジンの作動時に発生する排気音等の騒音を低減するものである（例えば、特許文献１参照）。
【０００４】
【特許文献１】
特開平１１−３６８５７号公報
【０００５】
そして、この種のマフラは、通常、マフラ支持装置を介してエンジン等に取付けられており、以下、従来技術によるマフラ支持装置について、油圧ショベルに適用した場合を例に挙げ、図８ないし図１１を参照しつつ説明する。
【０００６】
図中、１は油圧ショベルで、該油圧ショベル１の車体は、自走可能なクローラ式の下部走行体２と、該下部走行体２上に旋回可能に搭載された上部旋回体３とにより構成され、上部旋回体３の前部側には、土砂等の掘削作業を行う作業装置４が俯仰動可能に設けられている。
【０００７】
ここで、上部旋回体３は強固な骨組み構造をなす旋回フレーム５を有し、該旋回フレーム５の前部左側には、運転室を画成するキャブ６が設けられ、旋回フレーム５の後部側には、作業装置４との重量バランスをとるカウンタウエイト７が設けられ、旋回フレーム５の前，後方向の中間部位には、後述のエンジン９等を収容する建屋カバー８が設けられている。
【０００８】
９は建屋カバー８内に収容された原動機としてのエンジンで、該エンジン９は、左，右方向に延びる横置き状態となって旋回フレーム５上に配設されている。そして、エンジン９の左側には、フライホイール等（図示せず）を収容したフライホイールハウジング１０を介して油圧ポンプ１１が設けられ、該油圧ポンプ１１は、エンジン９によって駆動されることにより、走行用油圧モータ、旋回用油圧モータ、油圧シリンダ等の油圧アクチュエータ（いずれも図示せず）に作動用の圧油を供給するものである。
【０００９】
１２はエンジン９の排気管９Ａの先端側に接続されたマフラで、該マフラ１２は、後述のマフラ支持装置１３を用いてエンジン９のフライホイールハウジング１０に取付けられている。ここで、マフラ１２は、中空な円筒状の筒部１２Ａと、該筒部１２Ａの軸方向の両側を閉塞する蓋部１２Ｂとにより形成され、その内部には消音材（図示せず）が充填されている。そして、エンジン９の作動時における排気は、排気管９Ａを通じてマフラ１２内に導入され、該マフラ１２によって騒音が低減された状態で外部に排出される構成となっている。
【００１０】
１３はマフラ１２と該マフラ１２が取付けられるフライホイールハウジング１０（取付部材）との間に設けられたマフラ支持装置で、該マフラ支持装置１３は、フライホイールハウジング１０にマフラ１２を取付けて支持するものである。ここで、マフラ支持装置１３は、図１０および図１１に示すように、後述のベース部材１４と、支持ブラケット１６とにより大略構成されている。
【００１１】
１４はマフラ支持装置１３のベース部材で、該ベース部材１４は、例えば薄肉な鋼板等に折曲加工を施すことにより形成され、フライホイールハウジング１０にボルト１５を用いて固定されるものである。
【００１２】
１６はベース部材１４の上端側に固着されたマフラ支持部材としての支持ブラケットで、該支持ブラケット１６はマフラ１２を支持するものである。そして、支持ブラケット１６は、例えば四角形状をなす鋼板材に折曲加工を施すことにより凹円弧状に形成された凹円弧部１６Ａと、該凹円弧部１６Ａを挟む位置に設けられた２枚の水平板部１６Ｂと、該各水平板部１６Ｂの長さ方向の両端部に設けられたボルト挿通孔１６Ｃとにより構成されている。
【００１３】
ここで、支持ブラケット１６の凹円弧部１６Ａは、マフラ１２の筒部１２Ａ外周面とほぼ等しい曲率をもった凹円弧状に形成されている。従って、図１１に示すように、支持ブラケット１６の凹円弧部１６Ａ上にマフラ１２を載置することにより、凹円弧部１６Ａの上面とマフラ１２の筒部１２Ａ外周面とが隙間なく面接触した状態で、支持ブラケット１６がマフラ１２を支持する構成となっている。
【００１４】
１７，１７はマフラ１２の筒部１２Ａを支持ブラケット１６に締結する締結具で、該締結具１７は、長さ方向の中央部がマフラ１２の筒部１２Ａとほぼ等しい曲率をもった半円形状の折曲部１７Ａとなり両端部が雄ねじ部１７ＢとなったＵ字状の棒状体により構成されている。
【００１５】
そして、締結具１７は、折曲部１７Ａをマフラ１２の筒部１２Ａの外周面に係合させた状態で、各雄ねじ部１７Ｂを支持ブラケット１６のボルト挿通孔１６Ｃに挿通し、この雄ねじ部１７Ｂの先端側にナット１８を螺着することにより、マフラ１２を支持ブラケット１６に締結するものである。
【００１６】
従来技術によるマフラ支持装置１３は上述の如き構成を有するもので、このマフラ支持装置１３を用いて、エンジン９のフライホイールハウジング１０にマフラ１２を取付ける場合について述べる。
【００１７】
まず、ベース部材１４を、ボルト１５を用いてフライホイールハウジング１０に取付ける。次に、支持ブラケット１６の凹円弧部１６Ａ上にマフラ１２を載置した後、締結具１７の折曲部１７Ａをマフラ１２の筒部１２Ａ外周面に係合させ、該締結具１７の各雄ねじ部１７Ｂを支持ブラケット１６のボルト挿通孔１６Ｃに挿通する。
【００１８】
そして、雄ねじ部１７Ｂの先端側にナット１８を螺着することにより、フライホイールハウジング１０に、マフラ支持装置１３を用いてマフラ１２を取付けることができる。
【００１９】
【発明が解決しようとする課題】
しかし、上述した従来技術によるマフラ支持装置１３は、支持ブラケット１６の凹円弧部１６Ａが、マフラ１２の外周面とほぼ等しい曲率をもった凹円弧状に形成され、この凹円弧部１６Ａがマフラ１２の筒部１２Ａ外周面に面接触した状態で該マフラ１２を支持する構成となっている。
【００２０】
このため、例えば図１１中に二点鎖線で示すように、マフラ１２をこれよりも小径なマフラ１２′に交換した場合には、この交換したマフラ１２′の筒部外周面の曲率と支持ブラケット１６の凹円弧部１６Ａの曲率とが合わなくなり、支持ブラケット１６によってマフラ１２′を安定して支持することができなくなるという問題がある。
【００２１】
本発明は上述した従来技術の問題に鑑みなされたもので、マフラの外径寸法が変化した場合でも、このマフラを安定して支持することができるようにしたマフラ支持装置を提供することを目的としている。
【００２２】
【課題を解決するための手段】
上述した課題を解決するため、本発明は、筒状のマフラと該マフラが取付けられる取付部材との間に設けられ、取付部材に固定されるベース部材と、該ベース部材に設けられマフラの外周面に当接することにより該マフラを支持するマフラ支持部材とにより構成してなるマフラ支持装置に適用される。
【００２３】
そして、請求項１の発明の特徴は、マフラ支持部材は、マフラの筒部外周面を線接触状態で支持する棒状体により構成したことにある。このように構成したことにより、棒状体をマフラの筒部外周面に線接触させた状態で、該棒状体によってマフラを支持することができる。これにより、外径寸法の異なる複数種類のマフラを、共通なマフラ支持装置によって安定して支持することができる。
【００２４】
請求項２の発明は、棒状体は、マフラの筒部外周面に沿って延びる２本のマフラ支持棒により構成したことにある。このように構成したことにより、マフラを２本のマフラ支持棒にそれぞれ線接触させることができるので、これら２本のマフラ支持棒によって、外径寸法の異なる複数種類のマフラを確実に支持することができる。
【００２５】
請求項３の発明は、２本のマフラ支持棒は１本の棒材を折曲加工することにより一体形成する構成としたことにある。このように構成したことにより、例えば１本の棒材に折曲加工を施すだけで２本のマフラ支持棒を備えたマフラ支持部材を一体形成することができ、このマフラ支持部材をベース部材に固着するだけで、容易にマフラ支持装置を製造することができる。
【００２６】
請求項４の発明は、筒状のマフラと該マフラが取付けられる取付部材との間に設けられ、取付部材に固定されるベース部材と、該ベース部材に設けられマフラの外周面に当接することにより該マフラを支持するマフラ支持部材とにより構成してなるマフラ支持装置において、マフラ支持部材は、マフラの筒部外周面を線接触状態で支持する板状体により構成したことを特徴としている。
【００２７】
このように構成したことにより、支持すべきマフラの外径寸法が変化したとしても、このマフラの筒部外周面に板状体を線接触させた状態で、該板状体によってマフラを支持することができる。
【００２８】
請求項５の発明は、板状体は、マフラの軸方向に離間して配置されマフラの筒部外周面に線接触する平坦面を有する複数枚の板状片により構成したことにある。このように構成したことにより、複数の板状片の平坦面にそれぞれマフラの筒部外周面を線接触させた状態で、これら各板状片によって、外径寸法の異なる複数種類のマフラを確実に支持することができる。
【００２９】
【発明の実施の形態】
以下、本発明に係るマフラ支持装置の実施の形態を、油圧ショベルに搭載されたエンジンに適用した場合を例に挙げ、図１ないし図７を参照しつつ詳細に説明する。
【００３０】
まず、図１ないし図４は本発明の第１の実施の形態を示している。なお、本実施の形態では上述した従来技術と同一の構成要素に同一符号を付し、その説明を省略するものとする。
【００３１】
図中、２１はマフラ１２と該マフラ１２が取付けられるフライホイールハウジング１０との間に設けられたマフラ支持装置で、該マフラ支持装置２１は、従来技術によるマフラ支持装置１３に代えて本実施の形態に用いたものである。そして、マフラ支持装置２１は、フライホイールハウジング１０にマフラ１２を取付けて支持するもので、図２ないし図３に示すように、後述のベース部材２２と、棒状体２３とにより大略構成されている。
【００３２】
２２は取付部材としてのフライホイールハウジング１０に固定されるベース部材で、該ベース部材２２は、例えば鋼板材に折曲加工を施すことにより、フライホイールハウジング１０に取付けられる取付板２２Ａと、該取付板２２Ａの両端側から互いに対面しつつフライホイールハウジング１０から離間する方向に突出した突出板２２Ｂ，２２Ｃとからなる断面コ字状の枠体として形成されている。また、取付板２２Ａの下端側には、２個のボルト挿通孔２２Ｄ，２２Ｄが穿設されている。
【００３３】
そして、ベース部材２２は、各ボルト挿通孔２２Ｄに挿通したボルト１５をフライホイールハウジング１０に螺着することにより、該フライホイールハウジング１０の上端側に固定されている。
【００３４】
２３はベース部材２２の上端側に溶接等によって固着されたマフラ支持部材としての棒状体で、該棒状体２３は、マフラ１２を支持するものである。ここで、棒状体２３は、例えば１本の丸棒材に折曲加工を施すことにより全体としてほぼ四角形の枠状に形成され、マフラ１２を構成する筒部１２Ａの外周面に沿って互いに平行に延びる２本のマフラ支持棒２３Ａ，２３Ａと、これら各マフラ支持棒２３Ａ間を連結するＶ字状の連結棒２３Ｂと、各マフラ支持棒２３Ａの先端側から斜め下向きに傾斜した傾斜棒２３Ｃ，２３Ｃとにより構成されている。
【００３５】
そして、棒状体２３は、連結棒２３Ｂをベース部材２２の突出板２２Ｂに溶接等の手段を用いて固着し、各傾斜棒２３Ｃをベース部材２２の突出板２２Ｃに溶接等の手段を用いて固着することにより、ベース部材２２の上端側に強固に取付けられている。この場合、棒状体２３の各マフラ支持棒２３Ａは、図２ないし図４に示すように、マフラ１２を構成する筒部１２Ａの外周面に沿って互いに平行に延び、かつ、筒部１２Ａの最下部１２Ａ１よりも僅かに上方となる両側部位を該筒部１２Ａの径方向から挟む位置に配置されている。
【００３６】
これにより、図４に示すように、棒状体２３上にマフラ１２を載置したときには、２本のマフラ支持棒２３Ａ，２３Ａが、マフラ１２を構成する筒部１２Ａの最下部１２Ａ１を挟んだ状態で該筒部１２Ａの外周面にそれぞれ線接触するので、これら各マフラ支持棒２３Ａによって、マフラ１２を線接触状態で安定して支持することができる。
【００３７】
また、例えば図４中に二点鎖線で示すように、マフラ１２よりも小径なマフラ１２′を棒状体２３上に載置したとしても、各マフラ支持棒２３Ａが、それぞれマフラ１２′の筒部外周面に線接触するので、マフラ１２とは外径寸法が異なるマフラ１２′をも、各マフラ支持棒２３Ａによって安定して支持することができる構成となっている。
【００３８】
２４，２４，…は棒状体２３を構成する各マフラ支持棒２３Ａに２個ずつ設けられた合計４個のねじ座で、該ねじ座２４は、各マフラ支持棒２３Ａの長さ方向の両端側に溶接等の手段を用いて固着され、該マフラ支持棒２３Ａから水平方向に突出している。そして、各ねじ座２４の中央部には、後述する締結具２５の雄ねじ部２５Ｂが挿通されるボルト挿通孔２４Ａが穿設されている。
【００３９】
２５，２５はマフラ１２の筒部１２Ａを棒状体２３に締結する締結具で、該締結具２５は、長さ方向の中央部がマフラ１２の筒部１２Ａとほぼ等しい曲率をもった半円形状の折曲部２５Ａとなり両端部が雄ねじ部２５ＢとなったＵ字状の棒状体により構成されている。
【００４０】
そして、締結具２５は、折曲部２５Ａをマフラ１２の筒部１２Ａ外周面に係合させた状態で、各雄ねじ部２５Ｂを、棒状体２３（マフラ支持棒２３Ａ）に設けた各ねじ座２４のボルト挿通孔２４Ａに挿通し、ねじ座２４の下面側に突出した雄ねじ部２５Ｂの先端側にナット２６を螺着することにより、マフラ１２を棒状体２３に締結するものである。
【００４１】
本実施の形態によるマフラ支持装置２１は上述の如き構成を有するもので、以下、このマフラ支持装置２１を用いて、エンジン９のフライホイールハウジング１０にマフラ１２を取付ける場合について述べる。
【００４２】
まず、ベース部材２２のボルト挿通孔２２Ｄにボルト１５を挿通し、このボルト１５をフライホイールハウジング１０に螺着することにより、ベース部材２２をフライホイールハウジング１０に固定する。
【００４３】
次に、ベース部材２２の上端側に固着された棒状体２３上にマフラ１２を載置する。この場合、２本のマフラ支持棒２３Ａは、マフラ１２を構成する筒部１２Ａの最下部１２Ａ１を挟んだ状態で該筒部１２Ａの外周面にそれぞれ線接触し、該マフラ１２を線接触状態で支持するので、これら各マフラ支持棒２３Ａによってマフラ１２を安定して支持することができる。
【００４４】
この状態で、締結具２５の折曲部２５Ａをマフラ１２の筒部１２Ａ外周面に係合させ、該締結具２５の各雄ねじ部２５Ｂを、棒状体２３に設けたねじ座２４のボルト挿通孔２４Ａに挿通する。そして、ねじ座２４の下面側に突出した雄ねじ部２５Ｂの先端側にナット２６を螺着することにより、マフラ１２を棒状体２３に締結する。これにより、フライホイールハウジング１０に、マフラ支持装置２１を用いてマフラ１２を確実に取付けて支持することができる。
【００４５】
かくして、本実施の形態によるマフラ支持装置２１は、棒状体２３に２本のマフラ支持棒２３Ａ，２３Ａを設け、この２本のマフラ支持棒２３Ａが、マフラ１２の筒部１２Ａ外周面にそれぞれ線接触することにより、該マフラ１２を線接触状態で支持する構成となっている。
【００４６】
このため、例えば図４中に二点鎖線で示すように、マフラ１２よりも外径寸法が小さいマフラ１２′を支持する場合でも、２本のマフラ支持棒２３Ａ，２３Ａをマフラ１２′の筒部外周面にそれぞれ線接触させることができ、該マフラ１２′を各マフラ支持棒２３Ａによって安定して支持することができる。従って、支持すべきマフラの外径寸法が変化したとしても、このマフラをマフラ支持装置２１によって確実に支持することができるので、エンジン９に設けられる複数種類のマフラに対し、マフラ支持装置２１を共通化することができる。
【００４７】
また、本実施の形態によるマフラ支持装置２１は、ベース部材２２に設けられるマフラ支持部材としての棒状体２３を、２本のマフラ支持棒２３Ａ，２３Ａと、各マフラ支持棒２３Ａ間を連結する連結棒２３Ｂと、各マフラ支持棒２３Ａの先端側に設けられた傾斜棒２３Ｃ，２３Ｃとにより一体形成している。このため、１本の丸棒材に折曲加工を施すだけで棒状体２３を形成することができ、この棒状体２３をベース部材２２に固着することにより、マフラ支持装置２１を容易に製造することができる。
【００４８】
次に、図５ないし図７は本発明の第２の実施の形態を示し、本実施の形態の特徴は、マフラ支持部材を、マフラの筒部外周面を線接触状態で支持する板状体によって構成したことにある。なお、本実施の形態では上述した第１の実施の形態と同一の構成要素に同一符号を付し、その説明を省略するものとする。
【００４９】
図中、３１は第１の実施の形態によるマフラ支持装置２１に代えて本実施の形態に用いたマフラ支持装置で、該マフラ支持装置３１は、後述のベース部材３２と、各板状片３３，３４とにより大略構成されている。
【００５０】
３２はフライホイールハウジング１０に固定されるベース部材で、該ベース部材３２は、例えば鋼板材に折曲加工を施すことにより、フライホイールハウジング１０に取付けられる取付板３２Ａと、該取付板３２Ａの両端側から互いに対面しつつフライホイールハウジング１０から離間する方向に突出した突出板３２Ｂ，３２Ｃと、これら各突出板３２Ｂ，３２Ｃ間を連結し取付板３２Ａと対面した連結板３２Ｄとにより、長方形の閉断面形状を有する枠体として形成されている。また、取付板３２Ａの下端側には、２個のボルト挿通孔３２Ｅ，３２Ｅが穿設されている。
【００５１】
そして、ベース部材３２は、各ボルト挿通孔３２Ｅに挿通したボルト１５をフライホイールハウジング１０に螺着することにより、該フライホイールハウジング１０の上端側に固定されている。
【００５２】
３３，３３はベース部材３２を構成する取付板３２Ａの上端側に設けられた板状体としての２枚の板状片で、該各板状片３３は、マフラ１２の軸方向に離間して配置され、後述の各板状片３４と共にマフラ１２を支持するマフラ支持部材を構成するものである。
【００５３】
ここで、板状片３３は、ベース部材３２の取付板３２Ａから鉛直方向（上，下方向）に延びた鉛直面３３Ａと、該鉛直面３３Ａから斜め上向きに延び上端側がマフラ１２から徐々に離間するように傾斜した平坦面３３Ｂと、該平坦面３３Ｂから水平方向に延びた水平面３３Ｃとにより構成されている。
【００５４】
そして、鉛直面３３Ａは、ベース部材３２の取付板３２Ａに溶接等によって固着され、平坦面３３Ｂは、マフラ１２を構成する筒部１２Ａの外周面に線接触するものである。また、水平面３３Ｃには、締結具２５の雄ねじ部２５Ｂが挿通されるボルト挿通孔３３Ｄが穿設されている。
【００５５】
３４，３４はベース部材３２を構成する連結板３２Ｄの上端側に設けられた板状体としての２枚の板状片で、該各板状片３４は、マフラ１２の軸方向に離間し、かつ、上述した各板状片３３との間で、マフラ１２を構成する筒部１２Ａの最下部１２Ａ１よりも僅かに上方となる両側部位を該筒部１２Ａの径方向から挟む位置に配置されている。
【００５６】
ここで、板状片３４は、ベース部材３２の連結板３２Ｄから鉛直方向（上，下方向）に延びた鉛直面３４Ａと、該鉛直面３４Ａから斜め上向きに延び上端側がマフラ１２から徐々に離間するように傾斜した平坦面３４Ｂと、該平坦面３４Ｂから水平方向に延びた水平面３４Ｃとにより構成されている。
【００５７】
そして、鉛直面３４Ａは、ベース部材３２の連結板３２Ｄに溶接等によって固着され、平坦面３４Ｂは、マフラ１２の筒部１２Ａ外周面に線接触するものである。また、水平面３４Ｃには、締結具２５の雄ねじ部２５Ｂが挿通されるボルト挿通孔３４Ｄが穿設されている。
【００５８】
ここで、各板状片３３の平坦面３３Ｂと各板状片３４の平坦面３４Ｂとは、マフラ１２を構成する筒部１２Ａの外周面に沿って互いに平行に延び、かつ、筒部１２Ａの最下部１２Ａ１を該筒部１２Ａの径方向から挟む位置に配置されている。
【００５９】
これにより、図７に示すように、各板状片３３，３４上にマフラ１２を載置したときには、板状片３３の平坦面３３Ｂと板状片３４の平坦面３４Ｂとが、それぞれマフラ１２の筒部１２Ａ外周面に線接触し、該マフラ１２を線接触状態で支持するので、これら各板状片３３，３４によってマフラ１２を安定して支持することができる。
【００６０】
また、例えば図７中に二点鎖線で示すように、マフラ１２よりも小径なマフラ１２′を各板状片３３，３４上に載置したとしても、板状片３３の平坦面３３Ｂと板状片３４の平坦面３４Ｂとが、それぞれマフラ１２の筒部外周面に線接触するので、マフラ１２とは外径寸法が異なるマフラ１２′をも板状片３３，３４によって安定して支持することができる構成となっている。
【００６１】
本実施の形態によるマフラ支持装置３１は上述の如き構成を有するもので、このマフラ支持装置３１によってマフラ１２を支持する場合には、まず、ベース部材３２のボルト挿通孔３２Ｅにボルト１５を挿通し、このボルト１５をフライホイールハウジング１０に螺着することにより、ベース部材３２をフライホイールハウジング１０に固定する。
【００６２】
次に、ベース部材３２の上端側に固着された各板状片３３，３４上にマフラ１２を載置する。この場合、各板状片３３，３４の平坦面３３Ｂ，３４Ｂは、それぞれマフラ１２の筒部１２Ａ外周面に線接触し、該マフラ１２を線接触状態で支持するので、これら各板状片３３，３４によってマフラ１２を安定して支持することができる。
【００６３】
この状態で、締結具２５の折曲部２５Ａをマフラ１２の筒部１２Ａ外周面に係合させ、該締結具２５の各雄ねじ部２５Ｂを、互いに対向する板状片３３，３４のボルト挿通孔３３Ｄ，３４Ｄに挿通する。そして、雄ねじ部２５Ｂの先端側にナット２６を螺着し、マフラ１２を板状片３３，３４に締結することにより、マフラ１２をマフラ支持装置３１を用いてエンジン９のフライホイールハウジング１０に確実に取付けることができる。
【００６４】
この場合、各板状片３３，３４の平坦面３３Ｂ，３４Ｂは、マフラ１２の筒部１２Ａ外周面にそれぞれ線接触する構成となっている。このため、例えば図７中に二点鎖線で示すように、マフラ１２よりも外径寸法が小さいマフラ１２′を支持する場合でも、各板状片３３，３４の平坦面３３Ｂ，３４Ｂが、マフラ１２′の筒部外周面にそれぞれ線接触することにより、該マフラ１２′を板状片３３，３４によって安定して支持することができる。従って、支持すべきマフラの外径寸法が変化したとしても、このマフラを共通なマフラ支持装置３１によって確実に支持することができる。
【００６５】
なお、上述した第１の実施の形態では、マフラ１２を構成する筒部１２Ａの外周面に線接触する２本のマフラ支持棒２３Ａ，２３Ａを、連結棒２３Ｂ、傾斜棒２３Ｃと共に１本の棒材を用いて一体形成した場合を例に挙げている。しかし、本発明はこれに限るものではなく、例えばコ字状に折曲げた２本のマフラ当接棒を個別に形成し、これらマフラ当接棒をそれぞれベース部材２２に固着する構成としてもよい。
【００６６】
また、上述した第２の実施の形態では、ベース部材３２の取付板３２Ａに２枚の板状片３３を固着すると共に、ベース部材３２の連結板３２Ｄに２枚の板状片３４を固着した場合を例に挙げている。しかし、本発明はこれに限らず、例えばベース部材３２の取付板３２Ａと連結板３２Ｄとに、マフラ１２の軸方向に延びる１枚の板状体をそれぞれ固着する構成としてもよい。また、ベース部材３２の取付板３２Ａに３枚以上の板状片３３を固着し、ベース部材３２の連結板３２Ｄに３枚以上の板状片３４を固着する構成としてもよい。
【００６７】
また、上述した各実施の形態では、マフラ１２を取付ける取付部材としてエンジン９のフライホイールハウジング１０を用いた場合を例示している。しかし、本発明はこれに限らず、例えばエンジン９の周囲に配設された他の部材をマフラ１２の取付部材として用いてもよい。
【００６８】
さらに、上述した各実施の形態では、油圧ショベル１に搭載されたエンジン９に適用されるマフラ支持装置２１，３１を例示している。しかし、本発明はこれに限るものではなく、例えば産業機械、自動車等に搭載された原動機に適用してもよい。
【００６９】
【発明の効果】
以上詳述した如く、請求項１の発明によれば、マフラを支持するマフラ支持部材を、マフラの筒部外周面を線接触状態で支持する棒状体により構成している。このため、支持すべきマフラの外径寸法が変化したとしても、棒状体をマフラの筒部外周面に確実に線接触させることができる。従って、外径寸法の異なる複数種類のマフラを、共通な棒状体を有するマフラ支持装置によって安定して支持することができる。
【００７０】
また、請求項２の発明によれば、棒状体を、マフラの筒部外周面に沿って延びる２本のマフラ支持棒により構成したので、マフラの筒部外周面を２本のマフラ支持棒にそれぞれ線接触させることができ、これら２本のマフラ支持棒によって、外径寸法の異なる複数種類のマフラを安定して支持することができる。
【００７１】
また、請求項３の発明によれば、１本の棒材を折曲加工することにより、２本のマフラ支持棒を一体形成する構成としたので、例えば１本の棒材に折曲加工を施して２本のマフラ支持棒を備えたマフラ支持部材を一体形成し、このマフラ支持部材をベース部材に固着することにより、容易にマフラ支持装置を製造することができる。
【００７２】
また、請求項４の発明によれば、マフラ支持部材を、マフラの筒部外周面を線接触状態で支持する板状体によって構成したので、支持すべきマフラの外径寸法が変化したとしても、板状体をマフラの筒部外周面に線接触させることにより、該板状体によって外径寸法の異なる複数種類のマフラを安定して支持することができる。
【００７３】
さらに、請求項５の発明によれば、板状体を、マフラの軸方向に離間して配置されマフラの筒部外周面に線接触する平坦面をもった複数枚の板状片によって構成している。このため、複数の板状片の平坦面をそれぞれマフラの筒部外周面を線接触させることにより、これら各板状片によって、外径寸法の異なる複数種類のマフラを安定して支持することができる。
【図面の簡単な説明】
【図１】本発明の第１の実施の形態によるマフラ支持装置を、エンジン、マフラ等と共に示す斜視図である。
【図２】第１の実施の形態によるマフラ支持装置のベース部材、棒状体等を示す分解斜視図である。
【図３】マフラ支持装置のベース部材、棒状体、マフラ、フライホイールハウジング等を拡大して示す要部拡大図である。
【図４】マフラ支持装置のベース部材、棒状体、マフラ等を図３中の矢示ＩＶ−ＩＶ方向からみた断面図である。
【図５】第２の実施の形態によるマフラ支持装置のベース部材、板状片等を示す分解斜視図である。
【図６】マフラ支持装置のベース部材、板状片、マフラ、フライホイールハウジング等を拡大して示す図３と同様の要部拡大図である。
【図７】マフラ支持装置のベース部材、板状片、マフラ等を図６中の矢示ＶＩＩ−ＶＩＩ方向からみた断面図である。
【図８】従来技術によるマフラ支持装置を備えた油圧ショベルを示す一部破断の外観図である。
【図９】従来技術によるマフラ支持装置を、エンジン、マフラ等と共に示す斜視図である。
【図１０】従来技術によるマフラ支持装置のベース部材、支持ブラケット等を示す分解斜視図である。
【図１１】マフラ支持装置のベース部材、支持ブラケット、マフラ等を示す図４と同様の断面図である。
【符号の説明】
９ エンジン
１０ フライホイールハウジング（取付部材）
１２，１２′ マフラ
１２Ａ 筒部
２１，３１ マフラ支持装置
２２，３２ ベース部材
２３ 棒状体（マフラ支持部材）
２３Ａ マフラ支持棒
２３Ｂ 連結棒
２５ 締結具
３３，３４ 板状片（板状体）
３３Ｂ，３４Ｂ 平坦面[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a muffler support device suitably used for supporting a muffler of a prime mover mounted on, for example, a construction machine, an industrial machine, an automobile, and the like.
[0002]
[Prior art]
2. Description of the Related Art In general, various machines such as construction machines, industrial machines, and automobiles have a prime mover such as an engine as a power source. Construction machines, such as hydraulic shovels and hydraulic cranes, drive a hydraulic pump by an engine and supply hydraulic oil discharged from the hydraulic pump to hydraulic actuators such as a traveling device, a turning device, and a working device to travel downward. The running operation of the body, the turning operation of the upper swing body, the excavation work of earth and sand using the working device, and the like are performed.
[0003]
By the way, a muffler is usually provided in an exhaust pipe of an engine mounted on a hydraulic shovel or the like, and this muffler reduces noise such as exhaust noise generated when the engine is operated (for example, Patent Document 1). reference).
[0004]
[Patent Document 1]
JP-A-11-36857
[0005]
This type of muffler is usually attached to an engine or the like via a muffler support device. Hereinafter, a case where the conventional muffler support device is applied to a hydraulic excavator will be described with reference to FIGS. This will be described with reference to FIG.
[0006]
In the figure, reference numeral 1 denotes a hydraulic excavator, and a vehicle body of the hydraulic excavator 1 is composed of a crawler-type lower traveling body 2 capable of self-propelling and an upper revolving body 3 rotatably mounted on the lower traveling body 2. On the front side of the upper revolving unit 3, a working device 4 for excavating earth and sand is provided so as to be able to move up and down.
[0007]
Here, the upper swing body 3 has a swing frame 5 having a strong frame structure, and a cab 6 that defines a driver's cab is provided on the front left side of the swing frame 5, and a rear side of the swing frame 5 is provided. Is provided with a counterweight 7 for balancing the weight with the working device 4, and a building cover 8 for accommodating an engine 9 and the like to be described later is provided at an intermediate portion in front of and behind the turning frame 5.
[0008]
Reference numeral 9 denotes an engine as a prime mover housed in the building cover 8. The engine 9 is disposed on the revolving frame 5 in a horizontal state extending leftward and rightward. A hydraulic pump 11 is provided on the left side of the engine 9 via a flywheel housing 10 containing a flywheel or the like (not shown). The hydraulic pump 11 is driven by the engine 9 to travel. It supplies hydraulic oil for operation to hydraulic actuators (all not shown) such as a hydraulic motor for rotation, a hydraulic motor for turning, and a hydraulic cylinder.
[0009]
Reference numeral 12 denotes a muffler connected to a distal end of an exhaust pipe 9A of the engine 9. The muffler 12 is attached to a flywheel housing 10 of the engine 9 using a muffler support device 13 described later. Here, the muffler 12 is formed by a hollow cylindrical tube portion 12A and a lid portion 12B that closes both sides in the axial direction of the tube portion 12A, and the inside thereof is filled with a sound deadening material (not shown). Have been. The exhaust gas during operation of the engine 9 is introduced into the muffler 12 through the exhaust pipe 9A, and is discharged to the outside in a state where noise is reduced by the muffler 12.
[0010]
Reference numeral 13 denotes a muffler support device provided between the muffler 12 and the flywheel housing 10 (attachment member) to which the muffler 12 is attached. The muffler support device 13 attaches and supports the muffler 12 to the flywheel housing 10. Things. Here, as shown in FIGS. 10 and 11, the muffler support device 13 is generally constituted by a base member 14 described later and a support bracket 16.
[0011]
Reference numeral 14 denotes a base member of the muffler support device 13. The base member 14 is formed by, for example, bending a thin steel plate or the like, and is fixed to the flywheel housing 10 using bolts 15.
[0012]
Reference numeral 16 denotes a support bracket serving as a muffler support member fixed to the upper end side of the base member 14, and the support bracket 16 supports the muffler 12. The support bracket 16 includes, for example, a concave arc portion 16A formed into a concave arc shape by bending a steel plate having a square shape, and two sheets provided at positions sandwiching the concave arc portion 16A. It is composed of a horizontal plate portion 16B and bolt insertion holes 16C provided at both longitudinal ends of each horizontal plate portion 16B.
[0013]
Here, the concave arc portion 16A of the support bracket 16 is formed in a concave arc shape having substantially the same curvature as the outer peripheral surface of the cylindrical portion 12A of the muffler 12. Therefore, as shown in FIG. 11, by placing the muffler 12 on the concave arc portion 16A of the support bracket 16, the upper surface of the concave arc portion 16A and the outer peripheral surface of the cylindrical portion 12A of the muffler 12 are in surface contact with no gap. In this state, the support bracket 16 is configured to support the muffler 12.
[0014]
Reference numerals 17 and 17 denote fasteners for fastening the cylindrical portion 12A of the muffler 12 to the support bracket 16. The fastener 17 has a semicircular shape having a curvature in a central portion in a longitudinal direction substantially equal to that of the cylindrical portion 12A of the muffler 12. And a U-shaped rod-shaped body having both ends formed into male screw portions 17B.
[0015]
Then, the fastener 17 inserts each male screw portion 17B into the bolt insertion hole 16C of the support bracket 16 with the bent portion 17A engaged with the outer peripheral surface of the cylindrical portion 12A of the muffler 12, and the male screw portion 17B The muffler 12 is fastened to the support bracket 16 by screwing a nut 18 to the front end of the muffler.
[0016]
The muffler support device 13 according to the prior art has the above-described configuration, and a case where the muffler 12 is mounted on the flywheel housing 10 of the engine 9 using the muffler support device 13 will be described.
[0017]
First, the base member 14 is attached to the flywheel housing 10 using bolts 15. Next, after placing the muffler 12 on the concave arc portion 16A of the support bracket 16, the bent portion 17A of the fastener 17 is engaged with the outer peripheral surface of the cylindrical portion 12A of the muffler 12, and each male screw of the fastener 17 The portion 17B is inserted into the bolt insertion hole 16C of the support bracket 16.
[0018]
The muffler 12 can be attached to the flywheel housing 10 by using the muffler support device 13 by screwing the nut 18 to the distal end side of the male screw portion 17B.
[0019]
[Problems to be solved by the invention]
However, in the muffler support device 13 according to the conventional technique described above, the concave arc portion 16A of the support bracket 16 is formed in a concave arc shape having a curvature substantially equal to the outer peripheral surface of the muffler 12, and the concave arc portion 16A is formed in the muffler 12A. The muffler 12 is supported in a state of being in surface contact with the outer peripheral surface of the cylindrical portion 12A.
[0020]
For this reason, when the muffler 12 is replaced with a muffler 12 'having a smaller diameter as shown by a two-dot chain line in FIG. 11, for example, the curvature of the cylindrical portion outer peripheral surface of the replaced muffler 12' and the support bracket There is a problem in that the curvature of the concave arc portion 16A of 16 does not match, and the muffler 12 'cannot be stably supported by the support bracket 16.
[0021]
The present invention has been made in view of the above-described problems of the related art, and has an object to provide a muffler supporting device capable of stably supporting the muffler even when the outer diameter of the muffler changes. And
[0022]
[Means for Solving the Problems]
In order to solve the above-described problem, the present invention provides a base member provided between a cylindrical muffler and a mounting member to which the muffler is mounted, the base member fixed to the mounting member, and an outer periphery of the muffler provided on the base member. The present invention is applied to a muffler support device including a muffler support member that supports the muffler by contacting the surface.
[0023]
The feature of the first aspect of the present invention is that the muffler support member is constituted by a rod-shaped member that supports the outer peripheral surface of the cylindrical portion of the muffler in a line contact state. With this configuration, the muffler can be supported by the rod-shaped body while the rod-shaped body is in line contact with the outer peripheral surface of the cylindrical portion of the muffler. Thus, a plurality of types of mufflers having different outer diameters can be stably supported by the common muffler support device.
[0024]
The invention according to claim 2 is that the rod-shaped body is constituted by two muffler support rods extending along the outer peripheral surface of the cylindrical portion of the muffler. With this configuration, the muffler can be brought into line contact with the two muffler support rods, respectively, so that the two muffler support rods reliably support a plurality of types of mufflers having different outer diameters. Can be.
[0025]
According to a third aspect of the present invention, the two muffler support rods are integrally formed by bending one rod material. With this configuration, it is possible to integrally form a muffler support member having two muffler support rods, for example, only by bending one bar material, and use this muffler support member as a base member. Just by fixing, the muffler support device can be easily manufactured.
[0026]
According to a fourth aspect of the present invention, a base member is provided between a cylindrical muffler and a mounting member to which the muffler is mounted, and is fixed to the mounting member, and is in contact with an outer peripheral surface of the muffler provided on the base member. In the muffler support device constituted by the muffler support member for supporting the muffler, the muffler support member is characterized in that the muffler support member is constituted by a plate-like body which supports the outer peripheral surface of the cylindrical portion of the muffler in a line contact state.
[0027]
With this configuration, even if the outer diameter of the muffler to be supported changes, the muffler is supported by the plate-like body while the plate-like body is in line contact with the outer peripheral surface of the cylindrical portion of the muffler. be able to.
[0028]
The invention according to claim 5 is that the plate-like body is constituted by a plurality of plate-like pieces having a flat surface which is arranged in the axial direction of the muffler and is in line contact with the outer peripheral surface of the cylindrical portion of the muffler. With this configuration, a plurality of types of mufflers having different outer diameters can be reliably formed by these plate-shaped pieces in a state where the outer peripheral surface of the muffler is in line contact with the flat surface of each of the plurality of plate-shaped pieces. Can be supported.
[0029]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a muffler support device according to the present invention applied to an engine mounted on a hydraulic shovel will be described in detail with reference to FIGS. 1 to 7.
[0030]
First, FIG. 1 to FIG. 4 show a first embodiment of the present invention. In the present embodiment, the same components as those of the above-described related art are denoted by the same reference numerals, and description thereof will be omitted.
[0031]
In the figure, reference numeral 21 denotes a muffler support device provided between the muffler 12 and the flywheel housing 10 to which the muffler 12 is attached. The muffler support device 21 is replaced with the muffler support device 13 according to the prior art in the present embodiment. It is used for the form. The muffler support device 21 is for mounting and supporting the muffler 12 on the flywheel housing 10 and, as shown in FIGS. 2 and 3, is roughly constituted by a base member 22 described later and a rod 23. .
[0032]
Reference numeral 22 denotes a base member fixed to the flywheel housing 10 as a mounting member. The base member 22 is formed, for example, by bending a steel plate material, so that the mounting plate 22A is mounted on the flywheel housing 10; It is formed as a U-shaped cross-section frame composed of protruding plates 22B and 22C protruding in a direction away from the flywheel housing 10 while facing each other from both ends of the plate 22A. Further, two bolt insertion holes 22D, 22D are formed in the lower end side of the mounting plate 22A.
[0033]
The base member 22 is fixed to the upper end of the flywheel housing 10 by screwing the bolts 15 inserted into the bolt insertion holes 22D to the flywheel housing 10.
[0034]
Reference numeral 23 denotes a rod-shaped body as a muffler support member fixed to the upper end side of the base member 22 by welding or the like. The rod-shaped body 23 supports the muffler 12. Here, the rod-shaped body 23 is formed into a substantially rectangular frame shape as a whole by, for example, bending one round bar material, and is parallel to each other along the outer peripheral surface of the cylindrical portion 12A constituting the muffler 12. , Two muffler support rods 23A, 23A, a V-shaped connection rod 23B connecting the muffler support rods 23A to each other, and an inclined rod 23C inclined obliquely downward from the tip side of each muffler support rod 23A. 23C.
[0035]
The rod 23 is fixed to the connecting rod 23B on the protruding plate 22B of the base member 22 by means of welding or the like, and each of the inclined rods 23C is fixed to the protruding plate 22C of the base member 22 by means of welding or the like. By doing so, it is firmly attached to the upper end side of the base member 22. In this case, as shown in FIGS. 2 to 4, each muffler support rod 23A of the rod 23 extends in parallel with each other along the outer peripheral surface of the cylindrical portion 12A constituting the muffler 12, and at the same time, as shown in FIG. Both side portions slightly above the lower portion 12A1 are arranged at positions sandwiching the cylindrical portion 12A from the radial direction.
[0036]
Thereby, as shown in FIG. 4, when the muffler 12 is placed on the rod 23, the two muffler support rods 23A, 23A sandwich the lowermost part 12A1 of the cylindrical portion 12A constituting the muffler 12. Therefore, the muffler 12 can be stably supported in a line contact state by the muffler support rods 23A.
[0037]
Also, for example, as shown by a two-dot chain line in FIG. 4, even if a muffler 12 ′ having a smaller diameter than the muffler 12 is mounted on the rod 23, each muffler support rod 23 A is connected to the cylindrical portion of Since the outer peripheral surface is in line contact with the muffler 12, a muffler 12 'having an outer diameter different from that of the muffler 12 can be stably supported by each muffler support rod 23A.
[0038]
24, 24,... Are a total of four screw seats provided two by two on each muffler support rod 23A constituting the rod-shaped body 23. The screw seats 24 are located at both ends in the longitudinal direction of each muffler support rod 23A. , And is projected horizontally from the muffler support bar 23A. A bolt insertion hole 24A through which a male screw portion 25B of a fastener 25 described later is inserted is formed in the center of each screw seat 24.
[0039]
25, 25 are fasteners for fastening the cylindrical portion 12A of the muffler 12 to the rod 23, and the fastener 25 has a semicircular shape having a curvature in a central portion in the length direction substantially equal to that of the cylindrical portion 12A of the muffler 12. And a U-shaped rod having both ends formed into male screw portions 25B.
[0040]
Then, the fastener 25 has the male screw portion 25B provided on the rod 23 (muffler support bar 23A) with the bent portion 25A engaged with the outer peripheral surface of the cylindrical portion 12A of the muffler 12. The muffler 12 is fastened to the rod 23 by screwing a nut 26 into the distal end of a male screw portion 25B projecting from the lower surface of the screw seat 24 through the bolt insertion hole 24A.
[0041]
The muffler support device 21 according to the present embodiment has the above-described configuration. Hereinafter, a case where the muffler 12 is mounted on the flywheel housing 10 of the engine 9 using the muffler support device 21 will be described.
[0042]
First, the base member 22 is fixed to the flywheel housing 10 by inserting the bolt 15 into the bolt insertion hole 22D of the base member 22 and screwing the bolt 15 to the flywheel housing 10.
[0043]
Next, the muffler 12 is placed on the rod 23 fixed to the upper end of the base member 22. In this case, the two muffler support rods 23A are in line contact with the outer peripheral surface of the cylindrical portion 12A while sandwiching the lowermost portion 12A1 of the cylindrical portion 12A constituting the muffler 12, and the muffler 12 is in a line contact state. Since the muffler 12 is supported, the muffler 12 can be stably supported by these muffler support rods 23A.
[0044]
In this state, the bent portion 25A of the fastener 25 is engaged with the outer peripheral surface of the cylindrical portion 12A of the muffler 12, and each male screw portion 25B of the fastener 25 is inserted into the bolt insertion hole of the screw seat 24 provided on the rod 23. Insert through 24A. Then, the muffler 12 is fastened to the rod 23 by screwing a nut 26 to the distal end side of the male screw portion 25B protruding from the lower surface side of the screw seat 24. Thereby, the muffler 12 can be securely mounted and supported on the flywheel housing 10 by using the muffler support device 21.
[0045]
Thus, in the muffler support device 21 according to the present embodiment, the two muffler support rods 23A, 23A are provided on the rod 23, and the two muffler support rods 23A are respectively connected to the outer peripheral surface of the cylindrical portion 12A of the muffler 12. By contacting, the muffler 12 is supported in a line contact state.
[0046]
Therefore, for example, as shown by a two-dot chain line in FIG. 4, even when the muffler 12 'having an outer diameter smaller than the muffler 12 is supported, the two muffler support rods 23A, 23A are connected to the cylindrical portion of the muffler 12'. The muffler 12 'can be stably supported by the respective muffler support rods 23A. Therefore, even if the outer diameter of the muffler to be supported changes, the muffler can be reliably supported by the muffler support device 21. Therefore, the muffler support device 21 can be used for a plurality of types of mufflers provided in the engine 9. Can be standardized.
[0047]
Further, the muffler support device 21 according to the present embodiment connects the rod-shaped body 23 provided as the muffler support member provided on the base member 22 to connect the two muffler support rods 23A, 23A with each other. The rod 23B and the inclined rods 23C, 23C provided on the distal end side of each muffler support rod 23A are integrally formed. Therefore, the bar 23 can be formed only by bending one round bar, and the muffler support device 21 can be easily manufactured by fixing the bar 23 to the base member 22. be able to.
[0048]
Next, FIGS. 5 to 7 show a second embodiment of the present invention. The feature of this embodiment is that a plate-like member for supporting a muffler support member in a line contact state with the outer peripheral surface of a cylindrical portion of a muffler. It is constituted by. In this embodiment, the same components as those in the above-described first embodiment are denoted by the same reference numerals, and description thereof will be omitted.
[0049]
In the figure, reference numeral 31 denotes a muffler support device used in the present embodiment instead of the muffler support device 21 according to the first embodiment. The muffler support device 31 includes a base member 32 described later and each plate-like piece 33. , 34.
[0050]
Reference numeral 32 denotes a base member fixed to the flywheel housing 10. The base member 32 is formed by, for example, bending a steel plate to form a mounting plate 32 </ b> A mounted on the flywheel housing 10, and both ends of the mounting plate 32 </ b> A. The projecting plates 32B, 32C protruding in the direction away from the flywheel housing 10 while facing each other from the side, and the connecting plate 32D connecting the projecting plates 32B, 32C and facing the mounting plate 32A, the rectangular closing. It is formed as a frame having a cross-sectional shape. Further, two bolt insertion holes 32E, 32E are formed in the lower end side of the mounting plate 32A.
[0051]
The base member 32 is fixed to the upper end of the flywheel housing 10 by screwing the bolts 15 inserted into the respective bolt insertion holes 32E to the flywheel housing 10.
[0052]
Reference numerals 33, 33 denote two plate-like pieces as plate-like bodies provided on the upper end side of the mounting plate 32A constituting the base member 32. The plate-like pieces 33 are separated from each other in the axial direction of the muffler 12. The muffler support member is arranged and supports the muffler 12 together with the respective plate-shaped pieces 34 described later.
[0053]
Here, the plate-like piece 33 has a vertical surface 33A extending vertically (upward and downward) from the mounting plate 32A of the base member 32, and extends obliquely upward from the vertical surface 33A, and the upper end side is gradually separated from the muffler 12. And a horizontal surface 33C extending horizontally from the flat surface 33B.
[0054]
The vertical surface 33A is fixed to the mounting plate 32A of the base member 32 by welding or the like, and the flat surface 33B is in line contact with the outer peripheral surface of the cylindrical portion 12A constituting the muffler 12. A bolt insertion hole 33D through which the male screw portion 25B of the fastener 25 is inserted is formed in the horizontal plane 33C.
[0055]
Numerals 34 and 34 denote two plate-like pieces as plate-like bodies provided on the upper end side of the connecting plate 32D constituting the base member 32. The plate-like pieces 34 are separated from each other in the axial direction of the muffler 12, In addition, between the respective plate-shaped pieces 33 described above, both side portions slightly higher than the lowermost portion 12A1 of the cylindrical portion 12A constituting the muffler 12 are arranged at positions sandwiching the both side portions from the radial direction of the cylindrical portion 12A. I have.
[0056]
Here, the plate-shaped piece 34 has a vertical surface 34A extending vertically (upward and downward) from the connecting plate 32D of the base member 32, and extends obliquely upward from the vertical surface 34A, and the upper end side is gradually separated from the muffler 12. And a horizontal surface 34C extending horizontally from the flat surface 34B.
[0057]
The vertical surface 34A is fixed to the connecting plate 32D of the base member 32 by welding or the like, and the flat surface 34B is in line contact with the outer peripheral surface of the cylindrical portion 12A of the muffler 12. Further, a bolt insertion hole 34D through which the male screw portion 25B of the fastener 25 is inserted is formed in the horizontal plane 34C.
[0058]
Here, the flat surface 33B of each plate-like piece 33 and the flat surface 34B of each plate-like piece 34 extend in parallel with each other along the outer peripheral surface of the cylindrical portion 12A constituting the muffler 12, and The lowermost part 12A1 is arranged at a position sandwiching the lower part 12A from the radial direction of the cylindrical part 12A.
[0059]
Thereby, as shown in FIG. 7, when the muffler 12 is placed on each of the plate-like pieces 33, 34, the flat surface 33B of the plate-like piece 33 and the flat surface 34B of the plate-like piece 34 The muffler 12 can be stably supported by the plate-shaped pieces 33 and 34 because the muffler 12 is supported in a line contact with the outer peripheral surface of the cylindrical portion 12A.
[0060]
For example, as shown by a two-dot chain line in FIG. 7, even if a muffler 12 ′ having a smaller diameter than the muffler 12 is placed on each of the plate-shaped pieces 33, 34, the flat surface 33 B of the plate-shaped piece 33 and the plate Since the flat surface 34B of the piece 34 is in line contact with the outer peripheral surface of the cylindrical portion of the muffler 12, the muffler 12 'having an outer diameter different from that of the muffler 12 is also stably supported by the plate-like pieces 33 and 34. It has a configuration that can be used.
[0061]
The muffler support device 31 according to the present embodiment has the above-described configuration. When the muffler 12 is supported by the muffler support device 31, first, the bolt 15 is inserted into the bolt insertion hole 32E of the base member 32. The base member 32 is fixed to the flywheel housing 10 by screwing the bolt 15 to the flywheel housing 10.
[0062]
Next, the muffler 12 is placed on each of the plate-shaped pieces 33 and 34 fixed to the upper end side of the base member 32. In this case, the flat surfaces 33B and 34B of the plate-like pieces 33 and 34 are in line contact with the outer peripheral surface of the cylindrical portion 12A of the muffler 12, respectively, and support the muffler 12 in a line-contact state. , 34 allow the muffler 12 to be stably supported.
[0063]
In this state, the bent portion 25A of the fastener 25 is engaged with the outer peripheral surface of the cylindrical portion 12A of the muffler 12, and the male screw portions 25B of the fastener 25 are inserted into the bolt insertion holes of the plate-like pieces 33 and 34 facing each other. Insert through 33D and 34D. Then, the nut 26 is screwed onto the distal end side of the male screw portion 25B, and the muffler 12 is fastened to the plate-like pieces 33, 34, so that the muffler 12 is securely attached to the flywheel housing 10 of the engine 9 using the muffler support device 31. Can be mounted on
[0064]
In this case, the flat surfaces 33B and 34B of the plate-like pieces 33 and 34 are in line contact with the outer peripheral surface of the cylindrical portion 12A of the muffler 12, respectively. For this reason, as shown by a two-dot chain line in FIG. 7, even when supporting a muffler 12 'having an outer diameter smaller than that of the muffler 12, the flat surfaces 33B and 34B of the plate-like pieces 33 and 34 are The muffler 12 'can be stably supported by the plate-shaped pieces 33 and 34 by making line contact with the outer peripheral surface of the cylindrical portion 12'. Therefore, even if the outer diameter of the muffler to be supported changes, the muffler can be reliably supported by the common muffler support device 31.
[0065]
In the first embodiment described above, the two muffler support rods 23A, 23A that are in line contact with the outer peripheral surface of the cylindrical portion 12A that constitutes the muffler 12 are combined with one rod together with the connection rod 23B and the inclined rod 23C. An example is given in which the material is integrally formed using a material. However, the present invention is not limited to this. For example, two muffler contact rods bent in a U-shape may be separately formed, and these muffler contact rods may be fixed to the base member 22 respectively. .
[0066]
In the above-described second embodiment, two plate-shaped pieces 33 are fixed to the mounting plate 32A of the base member 32, and two plate-shaped pieces 34 are fixed to the connecting plate 32D of the base member 32. The case is taken as an example. However, the present invention is not limited to this, and one plate-shaped body extending in the axial direction of the muffler 12 may be fixed to the mounting plate 32A and the connecting plate 32D of the base member 32, for example. Alternatively, three or more plate-shaped pieces 33 may be fixed to the mounting plate 32A of the base member 32, and three or more plate-shaped pieces 34 may be fixed to the connecting plate 32D of the base member 32.
[0067]
Further, in each of the above-described embodiments, the case where the flywheel housing 10 of the engine 9 is used as an attachment member for attaching the muffler 12 is illustrated. However, the present invention is not limited to this, and for example, another member disposed around the engine 9 may be used as a mounting member for the muffler 12.
[0068]
Further, in each of the above-described embodiments, the muffler support devices 21 and 31 applied to the engine 9 mounted on the excavator 1 are illustrated. However, the present invention is not limited to this, and may be applied to, for example, a prime mover mounted on an industrial machine, an automobile, or the like.
[0069]
【The invention's effect】
As described in detail above, according to the first aspect of the present invention, the muffler support member that supports the muffler is formed of a rod that supports the outer peripheral surface of the cylindrical portion of the muffler in a line contact state. For this reason, even if the outer diameter of the muffler to be supported changes, the rod-shaped body can be reliably brought into line contact with the outer peripheral surface of the cylindrical portion of the muffler. Therefore, a plurality of types of mufflers having different outer diameters can be stably supported by the muffler support device having a common rod-shaped body.
[0070]
According to the second aspect of the present invention, since the rod-shaped body is constituted by the two muffler support rods extending along the outer peripheral surface of the muffler cylinder, the outer peripheral surface of the muffler cylinder is replaced with the two muffler support rods. The two muffler support rods can make line contact with each other, and can stably support a plurality of types of mufflers having different outer diameters.
[0071]
According to the third aspect of the present invention, the two muffler support rods are integrally formed by bending one bar, so that, for example, one bar is bent. The muffler support member provided with the two muffler support rods is integrally formed, and the muffler support member is fixed to the base member, whereby the muffler support device can be easily manufactured.
[0072]
According to the invention of claim 4, since the muffler support member is formed by the plate-like member that supports the outer peripheral surface of the muffler in a line contact state, even if the outer diameter of the muffler to be supported changes. By bringing the plate into line contact with the outer peripheral surface of the cylindrical portion of the muffler, a plurality of types of mufflers having different outer diameters can be stably supported by the plate.
[0073]
Furthermore, according to the fifth aspect of the present invention, the plate-like body is constituted by a plurality of plate-like pieces having a flat surface which is arranged in the axial direction of the muffler and is in line contact with the outer peripheral surface of the cylindrical portion of the muffler. ing. Therefore, by bringing the flat surfaces of the plurality of plate-shaped pieces into line contact with the outer peripheral surface of the cylindrical portion of the muffler, each of the plate-shaped pieces can stably support a plurality of types of mufflers having different outer diameters. it can.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a muffler support device according to a first embodiment of the present invention, together with an engine, a muffler, and the like.
FIG. 2 is an exploded perspective view showing a base member, a rod, and the like of the muffler support device according to the first embodiment.
FIG. 3 is an enlarged view of a main part showing a base member, a rod-shaped body, a muffler, a flywheel housing and the like of the muffler support device in an enlarged manner.
4 is a cross-sectional view of a base member, a rod-shaped body, a muffler, and the like of the muffler support device, as viewed in a direction indicated by arrows IV-IV in FIG.
FIG. 5 is an exploded perspective view showing a base member, a plate-like piece, and the like of a muffler support device according to a second embodiment.
FIG. 6 is an enlarged view of a main part similar to FIG. 3, showing an enlarged view of a base member, a plate-like piece, a muffler, a flywheel housing, and the like of the muffler support device.
7 is a cross-sectional view of a base member, a plate-like piece, a muffler, and the like of the muffler support device, as viewed in a direction indicated by arrows VII-VII in FIG.
FIG. 8 is a partially broken external view showing a hydraulic excavator provided with a muffler support device according to the related art.
FIG. 9 is a perspective view showing a muffler support device according to the related art together with an engine, a muffler, and the like.
FIG. 10 is an exploded perspective view showing a base member, a support bracket, and the like of a muffler support device according to the related art.
FIG. 11 is a sectional view similar to FIG. 4, showing a base member, a support bracket, a muffler, and the like of the muffler support device.
[Explanation of symbols]
9 Engine
10. Flywheel housing (mounting member)
12,12 'muffler
12A cylinder
21,31 Muffler support device
22, 32 Base member
23 rods (muffler support members)
23A Muffler support rod
23B Connecting rod
25 Fastener
33, 34 plate-shaped piece (plate-shaped body)
33B, 34B Flat surface

Claims (5)

筒状のマフラと該マフラが取付けられる取付部材との間に設けられ、前記取付部材に固定されるベース部材と、該ベース部材に設けられ前記マフラの外周面に当接することにより該マフラを支持するマフラ支持部材とにより構成してなるマフラ支持装置において、
前記マフラ支持部材は、前記マフラの筒部外周面を線接触状態で支持する棒状体により構成したことを特徴とするマフラ支持装置。The muffler is supported by being provided between a cylindrical muffler and a mounting member to which the muffler is mounted and fixed to the mounting member, and abutting on an outer peripheral surface of the muffler provided on the base member. Muffler support device configured by a muffler support member to
The muffler support device is characterized in that the muffler support member is constituted by a rod-shaped body that supports the outer peripheral surface of the cylindrical portion of the muffler in a line contact state. 前記棒状体は、前記マフラの筒部外周面に沿って延びる２本のマフラ支持棒により構成してなる請求項１に記載のマフラ支持装置。The muffler support device according to claim 1, wherein the rod-like body is constituted by two muffler support rods extending along the outer peripheral surface of the cylindrical portion of the muffler. 前記２本のマフラ支持棒は１本の棒材を折曲加工することにより一体形成する構成としてなる請求項２に記載のマフラ支持装置。The muffler support device according to claim 2, wherein the two muffler support rods are formed integrally by bending a single rod material. 筒状のマフラと該マフラが取付けられる取付部材との間に設けられ、前記取付部材に固定されるベース部材と、該ベース部材に設けられ前記マフラの外周面に当接することにより該マフラを支持するマフラ支持部材とにより構成してなるマフラ支持装置において、
前記マフラ支持部材は、前記マフラの筒部外周面を線接触状態で支持する板状体により構成したことを特徴とするマフラ支持装置。The muffler is supported by being provided between a cylindrical muffler and a mounting member to which the muffler is mounted and fixed to the mounting member, and abutting on an outer peripheral surface of the muffler provided on the base member. Muffler support device configured by a muffler support member to
The muffler support device is characterized in that the muffler support member is formed of a plate-like body that supports the outer peripheral surface of the cylindrical portion of the muffler in a line contact state. 前記板状体は、前記マフラの軸方向に離間して配置され前記マフラの筒部外周面に線接触する平坦面を有する複数枚の板状片により構成してなる請求項４に記載のマフラ支持装置。5. The muffler according to claim 4, wherein the plate-like body is constituted by a plurality of plate-like pieces having a flat surface that is arranged in the axial direction of the muffler so as to be in line contact with an outer peripheral surface of a cylindrical portion of the muffler. Support device.
JP2003140998A 2003-05-19 2003-05-19 Muffler support device Pending JP2004340114A (en)

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