JPWO2002042660A1 - Connecting rod - Google Patents

Connecting rod Download PDF

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Publication number
JPWO2002042660A1
JPWO2002042660A1 JP2002544559A JP2002544559A JPWO2002042660A1 JP WO2002042660 A1 JPWO2002042660 A1 JP WO2002042660A1 JP 2002544559 A JP2002544559 A JP 2002544559A JP 2002544559 A JP2002544559 A JP 2002544559A JP WO2002042660 A1 JPWO2002042660 A1 JP WO2002042660A1
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Prior art keywords
rod body
rod
mass member
connecting rod
rubber
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JP2002544559A
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Japanese (ja)
Inventor
高岡　政嗣
柿本　敏宏
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Toyo Tire Corp
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Toyo Tire and Rubber Co Ltd
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Publication of JPWO2002042660A1 publication Critical patent/JPWO2002042660A1/en
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    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C7/00—Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads
    • F16C7/02—Constructions of connecting-rods with constant length
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
    • F16F1/38—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers with a sleeve of elastic material between a rigid outer sleeve and a rigid inner sleeve or pin, i.e. bushing-type
    • F16F1/3842—Method of assembly, production or treatment; Mounting thereof
    • F16F1/3849—Mounting brackets therefor, e.g. stamped steel brackets; Restraining links
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/20—Type of damper
    • B60G2202/25—Dynamic damper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/10—Constructional features of arms
    • B60G2206/11—Constructional features of arms the arm being a radius or track or torque or steering rod or stabiliser end link
    • 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
    • B60K5/00—Arrangement or mounting of internal-combustion or jet-propulsion units
    • B60K5/12—Arrangement of engine supports
    • B60K5/1208—Resilient supports
    • 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
    • B60K5/00—Arrangement or mounting of internal-combustion or jet-propulsion units
    • B60K5/12—Arrangement of engine supports
    • B60K5/1241—Link-type support
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F7/00—Vibration-dampers; Shock-absorbers
    • F16F7/10—Vibration-dampers; Shock-absorbers using inertia effect

Abstract

本発明は、エンジンを車体に搭載し支持する場合のトルク支持用の連結ロッドとして、ダイナミックダンパーとしての機能を持たせるための質量部材を、ロッド本体に対して加硫成形により容易に、かつ外方への張り出しを抑えてコンパクトに付設装備できるようにし、組立性および搭載性を向上させる。その手段として、質量部材（６）は、ロッド本体（１）の外方部を囲む略環形状あるいは割環形状をなすものとし、これをロッド本体（１）と略同心に配して、ロッド本体（１）に対し両者に加硫接着したゴム状弾性体（７）を介して連設する。According to the present invention, a mass member for providing a function as a dynamic damper as a connecting rod for torque support when the engine is mounted on a vehicle body and supported, is easily and externally formed by vulcanization molding on the rod body. It can be installed compactly by suppressing overhang to the other side, improving the ease of assembly and mounting. As a means thereof, the mass member (6) has a substantially ring shape or a split ring shape surrounding the outer portion of the rod body (1), and is disposed substantially concentrically with the rod body (1). It is connected to the body (1) via a rubber-like elastic body (7) vulcanized and bonded to both.

Description

〔技術分野〕
本発明は、自動車に搭載されるエンジンもしくはそのユニットのロール方向の動きや振動を抑制するためのトルク支持用の連結ロッドに関するものである。
〔背景技術〕
乗用車等の自動車に搭載されるエンジンは、通常、トランスミッション等を含めたユニットに構成されて車体に組み込まれ、防振マウントにより支持される。この際、前記エンジンユニットのロール方向の動き又は振動を抑制するために、該ユニットの一部（主に下部）が車輌走行方向とは反対方向に延びるトルクロッドと称する連結ロッドにより車体に連結されている。
前記の連結ロッドは、図１１に例示するように、例えば金属製のパイプ材よりなるロッド本体１０１と、該ロッド本体１０１の両端に連設された二つの筒体１０２，１０３と、両筒体１０２，１０３内に装設された防振ブッシュ１０４，１０５とからなる。防振ブッシュ１０４，１０５は、内筒１４１，１５１と外筒１４２，１５２との間にゴム状弾性体１４３，１５３を介在させてなり、外筒１４２，１５２を前記筒体１０２，１０３に圧入することにより固着されている。
かかる連結ロッドにおいて、防振特性を改善する目的で、前記ロッド本体１０１にダイナミックダンパー２００が設けられており、このダンパー２００を構成する質量調整用の質量部材１０６がロッド本体１０１の一部に取着されている。
従来、前記質量部材１０６は、図１１のように、例えばロッド本体１０１に対して、該質量部材１０６と固定板１０６ａとにより該ロッド本体１０１を挟んでリベット止めすることにより取り付けられている。１０６ｂはリベット止め部分を示す。
しかし、取付位置を調整しながらのリベット止めによる取付けは、その作業に手数がかかり、固有振動数のチューニングも容易ではない。しかも、質量部材１０６がロッド本体１０１より外方へ大きく張り出した状態になるため、これがエンジンユニットを車体に連結して支持する場合に邪魔になることがあり、またエンジンルームに余分なスペースを確保する必要もある。
本発明は、上記のトルク支持用の連結ロッドとして、ダイナミックダンパーとしての機能を持たせるための質量調整用の質量部材を、ロッド本体に対して外方への張り出しを抑えて容易に付設でき、固有振動数のチューニングも容易で、組立性および搭載性に優れたものを提供する。
〔発明の開示〕
本発明は、基本構成として、ロッド本体と、その両端に連設されたブッシュ保持用の筒体と、両筒体の内部に装備された内筒付の防振ブッシュと、前記ロッド本体に付設された質量部材とを備える連結ロッドであって、前記質量部材が、ロッド本体の外方部を囲む略環形状をなし、ロッド本体と略同心に配されて、ロッド本体に対し両者に加硫接着されたゴム状弾性体を介して連設されてなることを特徴とする。
この連結ロッドによれば、ロッド本体をダイナミックダンパーとして機能させるための質量部材を、ロッド本体に対してゴム状弾性体の加硫成形により所定の位置に正確に付設でき、一体性にも優れる。また、リベット止め等の作業を必要としないため、質量の調整や固有振動数のチューニングも容易になる。
しかも、前記質量部材は、略環形状をなし、かつロッド本体と略同心に配されているため、前記質量部材の厚みが小さいものですみ、ロッド本体の外方を囲むものであっても、ロッド本体から過度に大きく張り出すことがない。そのため、エンジンユニットを車体に連結して支持するトルクロッドとして使用する場合において、前記質量部材が邪魔にならず、またエンジンルームに余分なスペースを確保する必要もない。
前記の連結ロッドにおいて、前記質量部材が、一部をロッド外径より大きく切欠した割環形状をなし、前記切欠部から前記ロッド本体の外方に配置されてゴム状弾性体により連設されてなるものが好ましい。
これにより、加硫成形時には、前記質量部材をロッド本体に対して側方より嵌め合わせるようにして容易にセットでき、加硫成形時のセット作業が行い易い。また、ロッド本体の両端にブッシュ保持用の筒体を連設したもの、あるいは完成品の連結ロッドに対しても、前記のように質量部材をセットして加硫成形により付設することが可能になる。
前記の質量部材が、略四角形で、その一辺部が切欠された割環形状をなしているものであると、円形の割環形状をなすものに比して、外径の割に大きな重量を保持でき、それだけ質量部材の外径を小さくできる。
また、前記の連結ロッドにおいて、前記質量部材が、ロッド本体を挟んで設けられたゴム状弾性体によりロッド本体と連設されてなるものの場合、ロッド本体と略同心に付設された前記質量部材が、連結ロッドによる支持対象物の振動に対して前記ゴム状弾性体のばね作用により共振でき、ダイナミックダンパーとして振動吸収作用を果たす。
本発明の他の一つは、上記と同様に、ロッド本体、ブッシュ保持用の筒体、防振ブッシュ、質量部材を基本構成として備える連結ロッドにおいて、前記ロッド本体が並列する２枚のロッド用プレートよりなり、前記質量部材が、前記２枚のプレート間の中間位置に配されて、該質量部材と前記両プレートとの両者に加硫接着されたゴム状弾性体を介して連設されてなることを特徴とする。
この連結ロッドにおいても、質量部材を、ロッド本体を構成する２枚のロッド用プレートに対して、ゴム状弾性体の加硫成形により所定の位置に正確に付設でき、またチューニングも容易になる。しかも、前記質量部材が、２枚のプレート間にあって、ロッド本体から張り出すことがないため、エンジンユニットを車体に支持するためのトルクロッドとして使用する場合において、前記質量部材が邪魔にならず、余分なスペースをとることもない。
また、前記質量部材が、その両側に設けられたゴム状弾性体により２枚のプレートと連設されて支持されるため、支持対象物の振動に対する前記質量部材の共振が良好になされ、ダイナミックダンパーとしての振動吸収作用が効果的になされる。
本発明のさらに他の一つは、上記と同様に、ロッド本体、ブッシュ保持用の筒体、防振ブッシュ、質量部材を基本構成として備える連結ロッドにおいて、前記ロッド本体が断面略Ｕ字形をなし、前記質量部材が、前記ロッド本体の内側に配されて、該質量部材とロッド本体との両者に加硫接着されたゴム状弾性体を介して連設されてなることを特徴とする。
この連結ロッドにおいても、質量部材を、ロッド本体に対してゴム状弾性体の加硫成形により所定の位置に正確に付設でき、またチューニングも容易になる。しかも、前記質量部材が、断面略Ｕ字形のロッド本体内にあって、ロッド本体から張り出すことがないため、エンジンユニットを支持するトルクロッドとして使用する場合において、スペース的に前記質量部材が邪魔になることがない。
またこの連結ロッドにおいて、前記質量部材が、その両側に設けられたゴム状弾性体により断面略Ｕ字形をなすロッド本体の両側板部と連設されていると、支持対象物の振動に対して前記質量部材が良好に共振でき、ダイナミックダンパーとしての作用が効果的になされる。
本発明のさらに他のもう一つの発明は、上記と同様に、ロッド本体、ブッシュ保持用の筒体、防振ブッシュ、質量部材を基本構成として備える連結ロッドにおいて、前記ロッド本体が角張った断面略Ｕ字形をなし、その中央板部に四角形の開口部が設けられ、前記質量部材が、該開口部の内部に配されて、該質量部材とロッド本体との両者に加硫接着されたゴム状弾性体を介して連設されてなることを特徴とする。
この連結ロッドにおいても、質量部材をロッド本体に対してゴム状弾性体の加硫成形により所定の位置に正確に付設できる。しかも、前記質量部材が、断面略Ｕ字形をなすロッド本体の中央板部の開口部内に配されて、ロッド本体から張り出すことがないため、エンジンユニットを支持するトルクロッドとして使用する場合において、スペース的に前記質量部材が邪魔になることがない。
前記の連結ロッドにおいて、ロッド本体の開口部に内方への切起し片が相対向して設けられ、前記質量部材が、前記両切起し片の中間に配されて、その両側に設けられたゴム状弾性体により前記両切起し片と連設されてなるものが好ましい。これにより、前記質量部材を断面略Ｕ字形のロッド本体内に確実に配設でき、しかも支持対象物の振動に対して前記質量部材が開口部内で良好に共振でき、ダイナミックダンパーとしての振動吸収の効果を良好に発揮できる。
〔発明を実施するための最良の形態〕
以下に、発明の連結ロッドの好適な実施例を図面を参照しながら説明するが、本発明はこれに限定されるものではない。
図１〜図３は、本発明の連結ロッドの第１実施例を示している。
図において、１は所要長さのロッド本体を、２，３はロッド本体１の両端にそれぞれ連設されたブッシュ保持用の筒体を、４，５は両筒体２，３の内部にそれぞれ装設した内筒付の防振ブッシュを示し、６は前記ロッド本体１に付設された質量部材を示す。
前記のロッド本体１は、従来と同様の金属製のパイプ等の棒状体よりなる。この棒状体としては、円形パイプに限らず、角形パイプや中実の棒体を用いることもできるが、実施上は図のような中空の円形パイプを用いるのが好ましい。このロッド本体１は、図のように、両端が前記両筒体２，３の外周に溶接されて連設されている。
前記防振ブッシュ４，５は、いずれも軸部材（図示せず）に対する取付部材となる内筒４１，５１と外筒４２，５２との間にゴム状弾性体４３，５３を介在させてなり、前記筒体２，３に対して外筒４２，５２が圧入されて固着されている。図の場合、径大側の防振ブッシュ５は、ゴム状弾性体５３に軸方向に貫通した空洞５４が設けられている。防振ブッシュは、前記の外筒４２，５２を省略して、筒体２，３内に装設することもできる。
そして、この第１実施例の場合、前記質量部材６は、下記のように構成されて前記ロッド本体１の長手方向の略中央部に付設されている。
前記質量部材６は、ロッド本体１の外方部をある程度の間隔をおいて囲むことができる略環形状、特に好ましくは、図のように一部をロッド外径ａより大きく切欠した割環形状をなしている。６１はその切欠部を示し、該切欠部６１の切欠幅ｂがロッド外径ａより僅かに大きくなっている。
前記の質量部材６は、ロッド本体１の外方を囲むように略同心に配されて、該質量部材６とロッド本体１との両者に加硫接着されたゴム状弾性体７を介してロッド本体１と連設されている。
質量部材６が、前記の切欠部６１を有さない環形状をなす場合は、ロッド本体１に筒体２，３を溶接するまでにロッド本体１に嵌め合わせるようにしてセットし、ゴム状弾性体７の加硫成形によりロッド本体１と質量部材６とを該ゴム状弾性体７により連設一体化させる。この後、ロッド本体１の両端に筒体２，３を溶接する。
前記質量部材６が割環形状をなす場合は、該質量部材６を、ロッド本体１に対して前記切欠部６１の部分を通して側方より嵌め合わせるようにして容易にセットできるので、ロッド本体１の両端にブッシュ保持用の筒体２，３を溶接する前に加硫成形して連設一体化することも、またロッド本体１の両端に筒体２，３を溶接した後で加硫成形して連設一体化することもできる。完成品の連結ロッドに対しても、前記のように質量部材６をセットして加硫成形することも可能になる。
いずれの場合にも、ロッド本体１と質量部材６とを連設するゴム状弾性体７は、質量部材６の周方向全長にわたって、あるいはロッド本体１の四方もしくは三方に設けられたものであってもよいが、実施上は、図のようにロッド本体１を挟んで対向位置に２方に設けておくのがよい。すなわち、これにより支持対象物の振動に対して前記質量部材６が良好に共振でき、ダイナミックダンパーとしての振動吸収作用を良好に発揮できることになる。
この実施例の連結ロッドによれば、ロッド本体１をダイナミックダンパーとして機能させるための質量部材６を、加硫成形により所定の位置に正確に付設できるので、質量の調整及び固有振動数のチューニングや設定が容易になる。しかも、前記質量部材６が、略環形状をなし、かつロッド本体と略同心に配されているため、厚みの小さいもので大きな質量を確保できる。またロッド本体１の外方を囲むものであっても、ロッド本体１から過度に大きく張り出すこともない。
なお、前記の質量部材６は、図３のような、円環形状あるいはその一部を切欠した割環形状をなすものに限らず、角部に丸みをつけた略四角形の環形、あるいは図４に示すように、略四角形の環形の一辺部を切欠した割環形状とすることもできる。この場合、円形の割環形状をなすものに比して、外径の割に大きな重量を保持できることになり、外径を小さくして質量を大きくすることが可能で、実施上有利である。
なお、前記の各実施例において、前記質量部材６の厚みや周方向長さあるいは径等は、要求される質量等に応じて適宜設定できる。
図５及び図６は、本発明の連結ロッドの第２実施例を示している。
この第２実施例において、第１実施例と共通する構成部材及び構成部位については同符合を付している。
この第２実施例においては、ロッド本体１が並列する２枚のロッド用プレート１２，１２よりなり、それぞれ両端がブッシュ保持用の筒体２，３に溶接されて、板面が互いに平行をなして対向している。
そして、質量を調整するための所要長さの柱状をなす質量部材６が、前記２枚のプレート１２，１２間の中間位置に配されて、該質量部材６と前記両プレート１２，１２との両者に加硫接着されたゴム状弾性体、特に質量部材６の両側に設けられたゴム状弾性体７２，７２を介して、両プレート１２，１２と連設されて支持されている。
この連結ロッドにおいても、質量部材６を、ゴム状弾性体７２，７２の加硫成形により所定の位置に正確に付設でき、また２枚のプレート１２，１２によるロッド本体１から外方へ突出させることなく嵩低く装備できる。しかも、質量部材６は、両プレート１２，１２間において、支持対象物の振動に対して両側のゴム状弾性体７２，７２のばね作用で良好に共振でき、ダイナミックダンパーとしての振動吸収作用も良好に行われる。
なお、この実施例において、前記質量部材６の長さや径及び形状は前記の支持状態を確保できる範囲で、要求される質量等に応じて適宜設定できる。また質量部材６は、プレート１２，１２によるロッド本体１の両端にブッシュ保持用の筒体２，３を溶接する前に加硫成形して連設することも、またロッド本体１の両端に筒体２，３を溶接した後で加硫成形して連設することもできる。
図７は、上記の第２実施例を変更した本発明の第３実施例を示しており、上記の実施例と共通する構成部材及び構成部位については同符合を付している。
この実施例においては、前記ロッド本体１３が主に角張った断面略Ｕ字形をなしており、前記質量部材６が、前記ロッド本体１３の内側に配されて、該質量部材６とロッド本体１３との両者に加硫接着されたゴム状弾性体７３を介して連設されている。特に、図のように質量部材６の両側に相対向して設けたゴム状弾性体７３，７３により、断面略Ｕ字形をなすロッド本体１３の両側板部１３ａ，１３ａに質量部材６を連設して支持することができる。
この連結ロッドにおいても、質量部材６を、ゴム状弾性体７３，７３の加硫成形により所定の位置に正確に付設でき、またロッド本体１３から外方へ突出させることなく装備でき、また支持対象物の振動に対して、質量部材６の共振によるダイナミックダンパーとしての作用も良好に行われる。
なお、この第３実施例においても、質量部材６は、ロッド本体７３の両端にブッシュ保持用の筒体２，３を溶接する前に加硫成形して連設することも、またロッド本体７３の両端に筒体２，３を溶接した後で加硫成形して連設することもできる。
図８〜図１０は、本発明の連結ロッドの第４実施例を示している。
この第４実施例において、上記の実施例と共通する構成部材及び構成部位については同符合を付している。
この実施例の連結ロッドにおいては、ロッド本体１４が角張った断面略Ｕ字形をなしており、その中央板部１５に四角形の開口部１６が設けられ、質量部材６が、該開口部１６の内部に配されて、該質量部材６とロッド本体１４との両者に加硫接着されたゴム状弾性体７４を介して連設されている。
特に、図の場合、前記開口部１６がロッド本体１４の長手方向の長方形をなし、その長手方向に相対向する両辺部には、断面略Ｕ字形の内方に向かって中央板部１５に対し略直角をなす切起し片１７，１７が設けられ、前記質量部材６が、前記両切起し片１７，１７の中間に配されて、質量部材の両側に加硫成形により設けられたゴム状弾性体７４，７４により、前記両切起し片１７，１７と連設一体化されている。
この連結ロッドにおいても、質量部材６をロッド本体１４に対してゴム状弾性体７４，７４の加硫成形により所定の位置に正確に付設できる。しかも、前記質量部材６が、断面略Ｕ字形をなすロッド本体１４の中央板部１５の開口部１６内にあって、ロッド本体１４から外方へ突出することがない。しかも、前記質量部材６は、開口部１６内において支持対象物の振動に対して共振できるため、ダイナミックダンパーとしての振動吸収作用が効果的になされる。
上記した各実施例の連結ロッドは、主としてトランスミッション等を含むエンジンユニットを車体に組み込んで防振マウントにより支持する場合に、エンジンユニットのロール方向の動き又は振動を抑制するために、該ユニットの一部を車体に連結するトルクロッドとして使用する。
この使用において、前記質量部材６が連結ロッドによる支持対象物の振動に対してゴム状弾性体７、７２、７３、７４のばね作用により共振することで、ダイナミックダンパーとして良好な振動吸収作用を果たすことができる。
また、質量を調整するための前記質量部材６は、ロッド本体から大きく、あるいは全く張り出すことがないため、前記質量部材が邪魔にならず、またエンジンルームに余分なスペースを確保する必要もなく、搭載性及び組立性を向上できる。
〔産業上の実施可能性〕
本発明の連結ロッドによれば、ダイナミックダンパーとしての機能を持たせるための質量調整用の質量部材を、ロッド本体に対して加硫成形により容易に、かつ外方への張り出しを抑えてコンパクトに付設装備でき、組立性および搭載性に優れ、自動車用エンジンを車体に搭載し支持する場合のトルク支持用のトルクロッドとして特に好適に使用できる。
【図面の簡単な説明】
図１は、本発明の連結ロッドの第１実施例を示す平面図である。
図２は、同上の連結ロッドの縦断面図である。
図３は、同上の連結ロッドの図１のＸ１−Ｘ１線の断面図である。
図４は、質量部材の形状を変更した場合の断面図である。
図５は、本発明の連結ロッドの第２実施例を示す平面図である。
図６は、前図のＸ２−Ｘ２線の断面図である。
図７は、本発明の連結ロッドの第３の実施例を示す前図と同様の断面図である。
図８は、本発明の連結ロッドの第４実施例を示す平面図である。
図９は、前図のＸ３−Ｘ３線の断面図である。
図１０は、同図のＸ４−Ｘ４線の断面図である。
図１１は、従来の連結ロッドの平面図である。〔Technical field〕
The present invention relates to a connecting rod for supporting a torque for suppressing movement or vibration in the roll direction of an engine or a unit thereof mounted on an automobile.
(Background technology)
An engine mounted on an automobile such as a passenger car is usually configured into a unit including a transmission and the like, is incorporated in a vehicle body, and is supported by an anti-vibration mount. At this time, in order to suppress the movement or vibration of the engine unit in the roll direction, a part (mainly the lower part) of the unit is connected to the vehicle body by a connecting rod called a torque rod extending in the direction opposite to the vehicle running direction. ing.
As shown in FIG. 11, the connecting rod includes a rod main body 101 made of, for example, a metal pipe material, two cylindrical bodies 102 and 103 connected to both ends of the rod main body 101, and both cylindrical bodies. Vibration-proof bushes 104 and 105 are provided in 102 and 103. The anti-vibration bushes 104 and 105 have rubber-like elastic bodies 143 and 153 interposed between the inner cylinders 141 and 151 and the outer cylinders 142 and 152, and press-fit the outer cylinders 142 and 152 into the cylinders 102 and 103. It is fixed by doing.
In such a connecting rod, a dynamic damper 200 is provided on the rod body 101 for the purpose of improving the vibration isolation characteristics, and a mass member 106 for adjusting the mass constituting the damper 200 is attached to a part of the rod body 101. Is being worn.
Conventionally, as shown in FIG. 11, the mass member 106 is attached to the rod body 101 by riveting the rod body 101 with the mass member 106 and the fixing plate 106a interposed therebetween. Reference numeral 106b denotes a riveted portion.
However, mounting by riveting while adjusting the mounting position requires a lot of work, and tuning of the natural frequency is not easy. In addition, since the mass member 106 protrudes greatly beyond the rod body 101, this may hinder the connection and support of the engine unit with the vehicle body, and secures extra space in the engine room. You also need to do it.
In the present invention, as the connecting rod for supporting the torque, a mass member for adjusting the mass to have a function as a dynamic damper can be easily attached to the rod main body by suppressing outward projection of the rod body. It is easy to tune the natural frequency, and provides an excellent assemblability and mountability.
[Disclosure of the Invention]
The present invention provides, as a basic configuration, a rod body, a bush holding cylinder connected to both ends of the rod body, an anti-vibration bush with an inner cylinder provided inside both cylinders, and a rod body attached to the rod body. A connecting rod comprising a mass member, wherein the mass member has a substantially annular shape surrounding an outer portion of the rod body, is disposed substantially concentrically with the rod body, and is vulcanized to the rod body. It is characterized by being continuously connected via a bonded rubber-like elastic body.
According to this connecting rod, a mass member for causing the rod body to function as a dynamic damper can be accurately attached to a predetermined position on the rod body by vulcanization molding of a rubber-like elastic body, and is also excellent in integrity. In addition, since it is not necessary to perform operations such as riveting, it is easy to adjust the mass and tune the natural frequency.
Moreover, since the mass member has a substantially annular shape and is disposed substantially concentrically with the rod body, the thickness of the mass member can be small, and even if the mass member surrounds the outside of the rod body, It does not protrude too much from the rod body. Therefore, when the engine unit is used as a torque rod that is connected to and supported by the vehicle body, the mass member does not interfere, and there is no need to secure an extra space in the engine room.
In the connecting rod, the mass member has a split ring shape in which a part is cutout larger than the rod outer diameter, and is arranged outside the rod body from the cutout portion and is continuously provided by a rubber-like elastic body. Are preferred.
Thereby, at the time of vulcanization molding, the mass member can be easily set by being fitted to the rod body from the side, and the setting operation at the time of vulcanization molding can be easily performed. In addition, it is possible to set the mass member as described above and attach it by vulcanization molding to a rod body having a bush holding cylinder connected to both ends of the rod body or a completed connecting rod. Become.
When the mass member has a substantially square shape and has a split ring shape in which one side portion is cut, a large weight is given for the outer diameter as compared with a circular split ring shape. The outer diameter of the mass member can be reduced accordingly.
Further, in the connecting rod, when the mass member is connected to the rod body by a rubber-like elastic body provided to sandwich the rod body, the mass member attached substantially concentrically to the rod body. The rubber-like elastic body can resonate with the vibration of the object to be supported by the connecting rod, and performs a vibration absorbing function as a dynamic damper.
Another one of the present invention is a connecting rod having a rod body, a cylinder for holding a bush, an anti-vibration bush, and a mass member as a basic configuration in the same manner as described above. The mass member is disposed at an intermediate position between the two plates, and is continuously provided via a rubber-like elastic body that is vulcanized and bonded to both the mass member and the two plates. It is characterized by becoming.
Also in this connecting rod, the mass member can be accurately attached to a predetermined position on the two rod plates constituting the rod main body by vulcanization molding of a rubber-like elastic body, and tuning is also facilitated. Moreover, since the mass member is located between the two plates and does not protrude from the rod body, when the engine unit is used as a torque rod for supporting the vehicle body, the mass member does not hinder the engine unit. No extra space is required.
In addition, since the mass member is connected to and supported by the two plates by the rubber-like elastic members provided on both sides thereof, resonance of the mass member with respect to vibration of the supported object is improved, and the dynamic damper is provided. As a result, the vibration absorbing action is effectively performed.
Still another aspect of the present invention is a connecting rod having a rod body, a bush holding cylinder, a vibration isolating bush, and a mass member as a basic configuration, as described above, wherein the rod body has a substantially U-shaped cross section. The mass member is disposed inside the rod body, and is connected to both the mass member and the rod body via a rubber-like elastic body that is vulcanized and bonded.
Also in this connecting rod, the mass member can be accurately attached to a predetermined position by vulcanization molding of a rubber-like elastic body with respect to the rod body, and tuning becomes easy. Moreover, since the mass member is in the rod body having a substantially U-shaped cross section and does not protrude from the rod body, the space member hinders the space when used as a torque rod for supporting an engine unit. Never be.
Further, in this connecting rod, when the mass member is connected to both side plates of the rod body having a substantially U-shaped cross section by rubber-like elastic bodies provided on both sides thereof, the mass member is resistant to vibration of the object to be supported. The mass member can satisfactorily resonate, and the function as a dynamic damper is effectively performed.
Still another invention of the present invention provides a connecting rod having a rod body, a cylinder for holding a bush, an anti-vibration bush, and a mass member as a basic configuration in the same manner as described above, wherein the rod body has a substantially square cross section. It is U-shaped, and a square opening is provided in a center plate portion thereof, and the mass member is disposed inside the opening portion and is vulcanized and bonded to both the mass member and the rod body. It is characterized by being continuously provided via an elastic body.
Also in this connecting rod, the mass member can be accurately attached to a predetermined position on the rod body by vulcanization molding of the rubber-like elastic body. Moreover, since the mass member is disposed in the opening of the central plate portion of the rod body having a substantially U-shaped cross section and does not protrude from the rod body, when used as a torque rod for supporting an engine unit, The mass member does not obstruct the space.
In the connecting rod, inwardly-raised pieces are provided opposite to each other in the opening of the rod body, and the mass member is disposed in the middle of the both-raised pieces and provided on both sides thereof. It is preferable that the cut-and-raised piece is provided continuously with the rubber-like elastic body provided. Thereby, the mass member can be reliably disposed in the rod body having a substantially U-shaped cross section, and the mass member can be favorably resonated in the opening with respect to the vibration of the object to be supported. The effect can be exhibited well.
[Best mode for carrying out the invention]
Hereinafter, a preferred embodiment of the connecting rod of the present invention will be described with reference to the drawings, but the present invention is not limited thereto.
1 to 3 show a connecting rod according to a first embodiment of the present invention.
In the figure, 1 is a rod body of a required length, 2 and 3 are bush holding cylinders connected to both ends of the rod body 1, respectively, and 4 and 5 are inside the two cylinders 2 and 3, respectively. Shown is a mounted anti-vibration bush with an inner cylinder, and 6 is a mass member attached to the rod body 1.
The rod body 1 is made of a rod-like body such as a metal pipe similar to the conventional one. The rod-shaped body is not limited to a circular pipe, and may be a square pipe or a solid rod. However, in practice, it is preferable to use a hollow circular pipe as shown in the figure. As shown in the figure, the rod body 1 has both ends welded to the outer circumferences of the two cylindrical bodies 2 and 3 and is continuously provided.
Each of the vibration-isolating bushes 4 and 5 has rubber-like elastic bodies 43 and 53 interposed between inner cylinders 41 and 51 and outer cylinders 42 and 52 which are attachment members for a shaft member (not shown). Outer cylinders 42 and 52 are press-fitted and fixed to the cylinders 2 and 3. In the case of the drawing, the vibration-proof bush 5 on the large diameter side is provided with a cavity 54 penetrating in the axial direction in the rubber-like elastic body 53. The anti-vibration bush may be provided in the cylindrical bodies 2 and 3 by omitting the outer cylinders 42 and 52.
In the case of the first embodiment, the mass member 6 is configured as described below and attached to a substantially central portion of the rod body 1 in the longitudinal direction.
The mass member 6 has a substantially ring shape capable of surrounding the outer portion of the rod body 1 at a certain interval, particularly preferably a split ring shape in which a part is cut out larger than the rod outer diameter a as shown in the figure. Has made. Numeral 61 indicates the notch, and the notch width b of the notch 61 is slightly larger than the rod outer diameter a.
The mass member 6 is disposed substantially concentrically so as to surround the outside of the rod body 1, and is connected to the rod via a rubber-like elastic body 7 that is vulcanized and bonded to both the mass member 6 and the rod body 1. It is connected to the main body 1.
When the mass member 6 has an annular shape without the notch 61, the mass member 6 is set so as to be fitted to the rod body 1 by the time the cylindrical bodies 2 and 3 are welded to the rod body 1, and set in a rubber-like elasticity. The rod body 1 and the mass member 6 are connected and integrated by the rubber-like elastic body 7 by vulcanization molding of the body 7. Thereafter, the cylindrical bodies 2 and 3 are welded to both ends of the rod body 1.
When the mass member 6 has a split ring shape, the mass member 6 can be easily set by being fitted into the rod body 1 from the side through the cutout portion 61, so that the rod body 1 Before welding the bush holding cylinders 2 and 3 to both ends, vulcanization molding may be performed so as to be connected and integrated. Alternatively, after welding the cylinders 2 and 3 to both ends of the rod body 1, vulcanization molding may be performed. It can also be connected and integrated. It is also possible to set the mass member 6 and vulcanize the finished connecting rod as described above.
In any case, the rubber-like elastic body 7 that connects the rod body 1 and the mass member 6 is provided over the entire length of the mass member 6 in the circumferential direction, or on all or three sides of the rod body 1. However, in practice, it is preferable to provide the rod body 1 at two opposing positions with the rod body 1 interposed therebetween as shown in the figure. In other words, this allows the mass member 6 to resonate favorably with the vibration of the supporting object, and to exhibit the vibration absorbing function as a dynamic damper.
According to the connecting rod of this embodiment, the mass member 6 for causing the rod body 1 to function as a dynamic damper can be accurately attached to a predetermined position by vulcanization molding. Setting is easy. Moreover, since the mass member 6 has a substantially annular shape and is arranged substantially concentrically with the rod body, a large mass can be secured with a small thickness. Also, even if it surrounds the outside of the rod body 1, it does not protrude too much from the rod body 1.
The mass member 6 is not limited to a ring shape as shown in FIG. 3 or a split ring shape in which a part of the mass member 6 is cut away, and a substantially square ring shape with rounded corners, or FIG. As shown in the figure, a substantially ring-shaped ring may be cut into one side to form a split ring. In this case, it is possible to maintain a large weight for the outer diameter as compared with a circular split ring shape, and it is possible to reduce the outer diameter and increase the mass, which is advantageous in practice.
In each of the above embodiments, the thickness, the circumferential length, the diameter, and the like of the mass member 6 can be appropriately set according to the required mass and the like.
5 and 6 show a second embodiment of the connecting rod of the present invention.
In the second embodiment, the same reference numerals are given to constituent members and constituent parts common to the first embodiment.
In the second embodiment, the rod body 1 is composed of two rod plates 12, 12 arranged in parallel, both ends of which are welded to the bush holding cylinders 2, 3, so that the plate surfaces are parallel to each other. Facing each other.
Then, a columnar mass member 6 of a required length for adjusting the mass is arranged at an intermediate position between the two plates 12, 12, so that the mass member 6 and the two plates 12, 12 are connected to each other. The two plates 12, 12 are connected to and supported by rubber-like elastic bodies vulcanized and bonded to both, particularly rubber-like elastic bodies 72, 72 provided on both sides of the mass member 6.
Also in this connecting rod, the mass member 6 can be accurately attached to a predetermined position by vulcanization molding of the rubber-like elastic bodies 72, 72, and is protruded outward from the rod body 1 by the two plates 12, 12. It can be installed low without bulk. Moreover, the mass member 6 can favorably resonate between the two plates 12, 12 with the spring action of the rubber-like elastic bodies 72, 72 on both sides against the vibration of the supporting object, and also has a good vibration absorbing action as a dynamic damper. Done in
In this embodiment, the length, diameter, and shape of the mass member 6 can be appropriately set in accordance with the required mass and the like as long as the supporting state can be secured. The mass member 6 can be vulcanized and connected to both ends of the rod body 1 before welding the bush holding cylinders 2 and 3 to both ends of the rod body 1 by the plates 12 and 12. After the bodies 2 and 3 are welded, they can be vulcanized and formed continuously.
FIG. 7 shows a third embodiment of the present invention in which the above-described second embodiment is modified, and the same reference numerals are given to constituent members and components common to the above-described embodiment.
In this embodiment, the rod body 13 has a substantially U-shaped cross-section that is mainly angular, and the mass member 6 is disposed inside the rod body 13 so that the mass member 6 and the rod body 13 Are connected to each other via a rubber-like elastic body 73 bonded and vulcanized. In particular, the mass members 6 are connected to both side plate portions 13a, 13a of the rod body 13 having a substantially U-shaped cross section by rubber-like elastic bodies 73, 73 provided on both sides of the mass member 6 to face each other as shown in the figure. Can be supported.
Also in this connecting rod, the mass member 6 can be accurately attached to a predetermined position by vulcanization molding of the rubber-like elastic bodies 73, 73, can be provided without projecting outward from the rod body 13, and can be supported. The action of the dynamic damper due to the resonance of the mass member 6 against the vibration of the object is also performed well.
Also in this third embodiment, the mass member 6 can be continuously formed by vulcanizing and molding before and after welding the bush holding cylinders 2 and 3 to both ends of the rod body 73. After the cylindrical bodies 2 and 3 are welded to both ends, vulcanization molding can be performed so as to be continuously provided.
8 to 10 show a connecting rod according to a fourth embodiment of the present invention.
In the fourth embodiment, the same reference numerals are given to constituent members and constituent parts common to the above-described embodiment.
In the connecting rod of this embodiment, the rod main body 14 has a substantially U-shaped cross section with a square shape, and a square opening 16 is provided in the central plate portion 15, and the mass member 6 is provided inside the opening 16. , And connected to both the mass member 6 and the rod body 14 via a rubber-like elastic body 74 that is vulcanized and adhered.
In particular, in the case of the drawing, the opening 16 forms a rectangle in the longitudinal direction of the rod body 14, and the two sides facing each other in the longitudinal direction have a substantially U-shaped cross section with respect to the center plate 15. A substantially perpendicular cut-and-raised piece 17, 17 is provided, and the mass member 6 is disposed between the both cut-and-raised pieces 17, 17 and is provided on both sides of the mass member by vulcanization molding. The cut-and-raised pieces 17, 17 are connected and integrated by the elastic members 74, 74.
Also in this connecting rod, the mass member 6 can be accurately attached to a predetermined position on the rod main body 14 by vulcanization of the rubber-like elastic bodies 74, 74. Moreover, the mass member 6 is located inside the opening 16 of the central plate portion 15 of the rod body 14 having a substantially U-shaped cross section, and does not protrude outward from the rod body 14. In addition, since the mass member 6 can resonate with the vibration of the supporting object in the opening 16, the vibration absorbing function as a dynamic damper is effectively performed.
The connecting rod of each of the above-described embodiments is designed to reduce the movement or vibration of the engine unit in the roll direction when the engine unit including the transmission and the like is incorporated in the vehicle body and supported by the vibration-proof mount. Used as a torque rod that connects the part to the vehicle body.
In this use, the mass member 6 resonates with the vibration of the object to be supported by the connecting rod by the spring action of the rubber-like elastic bodies 7, 72, 73, 74, so that a good vibration absorbing function as a dynamic damper is achieved. be able to.
Further, since the mass member 6 for adjusting the mass is large or does not project at all from the rod body, the mass member does not interfere, and there is no need to secure an extra space in the engine room. , Mountability and assemblability can be improved.
[Industrial feasibility]
ADVANTAGE OF THE INVENTION According to the connecting rod of this invention, the mass member for mass adjustment to have the function as a dynamic damper can be easily compacted by vulcanization molding with respect to the rod main body, and it suppresses outward projection and is compact. It can be attached and installed, is excellent in assemblability and mountability, and can be particularly suitably used as a torque rod for supporting a torque when an automobile engine is mounted and supported on a vehicle body.
[Brief description of the drawings]
FIG. 1 is a plan view showing a first embodiment of the connecting rod of the present invention.
FIG. 2 is a longitudinal sectional view of the connecting rod according to the first embodiment.
FIG. 3 is a sectional view of the connecting rod, taken along line X1-X1 in FIG.
FIG. 4 is a cross-sectional view when the shape of the mass member is changed.
FIG. 5 is a plan view showing a second embodiment of the connecting rod of the present invention.
FIG. 6 is a cross-sectional view taken along the line X2-X2 of the previous figure.
FIG. 7 is a sectional view similar to the previous figure, showing a third embodiment of the connecting rod of the present invention.
FIG. 8 is a plan view showing a fourth embodiment of the connecting rod of the present invention.
FIG. 9 is a cross-sectional view taken along line X3-X3 of the previous figure.
FIG. 10 is a sectional view taken along line X4-X4 of FIG.
FIG. 11 is a plan view of a conventional connecting rod.

Claims (9)

ロッド本体と、その両端に連設されたブッシュ保持用の筒体と、両筒体の内部に装備された内筒付の防振ブッシュと、前記ロッド本体に付設された質量部材とからなる連結ロッドであって、
前記質量部材が、ロッド本体の外方部を囲む略環形状をなし、ロッド本体と略同心に配されて、ロッド本体に対し両者に加硫接着されたゴム状弾性体を介して連設されてなることを特徴とする連結ロッド。A connection comprising a rod body, a bush holding cylinder connected to both ends of the rod body, an anti-vibration bush with an inner cylinder provided inside the two cylinders, and a mass member attached to the rod body. A rod,
The mass member has a substantially annular shape surrounding the outer portion of the rod body, is disposed substantially concentrically with the rod body, and is connected to the rod body via a rubber-like elastic body that is vulcanized and bonded to both. A connecting rod, comprising: 前記質量部材が、一部をロッド外径より大きく切欠した割環形状をなしており、前記切欠部から前記ロッド本体の外方に配置されてゴム状弾性体により連設されてなる請求項１に記載の連結ロッド。2. The mass member has a split ring shape in which a part is cutout larger than the rod outer diameter, and is arranged outside the rod body from the cutout portion and continuously provided by a rubber-like elastic body. The connecting rod according to item 1. 前記質量部材が略四角形で、その一辺部が切欠された割環形状をなしている請求項２に記載の連結ロッド。The connecting rod according to claim 2, wherein the mass member has a substantially quadrangular shape, and has a split ring shape in which one side is cut off. 前記質量部材が、ロッド本体を挟んで設けられたゴム状弾性体によりロッド本体と連設されてなる請求項１〜３のいずれか１項に記載の連結ロッド。The connecting rod according to any one of claims 1 to 3, wherein the mass member is connected to the rod body by a rubber-like elastic body provided across the rod body. ロッド本体と、その両端に連設されたブッシュ保持用の筒体と、両筒体の内部に装備された内筒付の防振ブッシュと、前記ロッド本体に付設された質量部材とからなる連結ロッドであって、
前記ロッド本体が並列する２枚のロッド用プレートよりなり、前記質量部材が、前記２枚のプレート間の中間位置に配されて、該質量部材と前記両プレートとの両者に加硫接着されたゴム状弾性体を介して連設されてなることを特徴とする連結ロッド。A connection comprising a rod body, a bush holding cylinder connected to both ends of the rod body, an anti-vibration bush with an inner cylinder provided inside the two cylinders, and a mass member attached to the rod body. A rod,
The rod body is composed of two rod plates arranged side by side, and the mass member is disposed at an intermediate position between the two plates, and is vulcanized and bonded to both the mass member and the two plates. A connecting rod, which is continuously provided via a rubber-like elastic body. ロッド本体と、その両端に連設されたブッシュ保持用の筒体と、両筒体の内部に装備された内筒付の防振ブッシュと、前記ロッド本体に付設された質量部材とからなる連結ロッドであって、
前記ロッド本体が断面略Ｕ字形をなし、前記質量部材が、前記ロッド本体の内側に配されて、該質量部材とロッド本体との両者に加硫接着されたゴム状弾性体を介して連設されてなることを特徴とする連結ロッド。A connection comprising a rod body, a bush holding cylinder connected to both ends of the rod body, an anti-vibration bush with an inner cylinder provided inside the two cylinders, and a mass member attached to the rod body. A rod,
The rod body has a substantially U-shaped cross section, and the mass member is disposed inside the rod body, and is continuously provided via a rubber-like elastic body that is vulcanized and bonded to both the mass member and the rod body. A connecting rod characterized by being made. 前記質量部材が、その両側に設けられたゴム状弾性体により断面略Ｕ字形をなすロッド本体の両側板部と連設されてなる請求項６に記載の連結ロッド。The connecting rod according to claim 6, wherein the mass member is connected to both side plate portions of a rod body having a substantially U-shaped cross section by rubber-like elastic bodies provided on both sides thereof. ロッド本体と、その両端に連設されたブッシュ保持用の筒体と、両筒体の内部に装備された内筒付の防振ブッシュと、前記ロッド本体に付設された質量部材とからなる連結ロッドであって、
前記ロッド本体が角張った断面略Ｕ字形をなし、その中央板部に四角形の開口部が設けられ、前記質量部材が、該開口部の内部に配されて、該質量部材とロッド本体との両者に加硫接着されたゴム状弾性体を介して連設されてなることを特徴とする連結ロッド。A connection comprising a rod body, a bush holding cylinder connected to both ends of the rod body, an anti-vibration bush with an inner cylinder provided inside the two cylinders, and a mass member attached to the rod body. A rod,
The rod body has a substantially U-shaped section with a square cross section, and a square opening is provided in a central plate portion thereof, and the mass member is disposed inside the opening, and both the mass member and the rod body are provided. A connecting rod, which is continuously provided via a rubber-like elastic body that is vulcanized and bonded to the connecting rod. ロッド本体の開口部に内方への切起し片が相対向して設けられ、前記質量部材が、前記両切起し片の中間に配されて、その両側に設けられたゴム状弾性体により前記両切起し片と連設されてなる請求項８に記載の連結ロッド。Inwardly-raised pieces are provided opposite to each other in the opening of the rod body, and the mass member is disposed in the middle of the both-raised pieces and rubber-like elastic bodies provided on both sides thereof The connecting rod according to claim 8, wherein the connecting rod is connected to the both cut-and-raised pieces.
JP2002544559A 2000-11-22 2000-11-22 Connecting rod Pending JPWO2002042660A1 (en)

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