JPH0144834Y2 - - Google Patents
Info
- Publication number
- JPH0144834Y2 JPH0144834Y2 JP4723082U JP4723082U JPH0144834Y2 JP H0144834 Y2 JPH0144834 Y2 JP H0144834Y2 JP 4723082 U JP4723082 U JP 4723082U JP 4723082 U JP4723082 U JP 4723082U JP H0144834 Y2 JPH0144834 Y2 JP H0144834Y2
- Authority
- JP
- Japan
- Prior art keywords
- elastic sheet
- elastic
- cylindrical
- rigid cylindrical
- grooves
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 description 6
- 230000017525 heat dissipation Effects 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000013016 damping Methods 0.000 description 3
- 239000013013 elastic material Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
Landscapes
- Pulleys (AREA)
Description
【考案の詳細な説明】
本考案は円筒形トーシヨナルダンパに係り、特
に内燃機関のクランクシヤフト等、回転軸に取り
付けられて同軸のねじり振動を吸収する円筒形の
トーシヨナルダンパに関するものである。[Detailed Description of the Invention] The present invention relates to a cylindrical torsional damper, and more particularly to a cylindrical torsional damper that is attached to a rotating shaft such as a crankshaft of an internal combustion engine and absorbs coaxial torsional vibration.
一般に、内燃機関のクランクシヤフト等は複雑
なねじり振動を受けるため、このクランクシヤフ
ト等に円筒形のトーシヨナルダンパを取り付け
て、該ねじり振動を吸収するようにした対策が考
えられている。そして、このトーシヨナルダンパ
は、クランクシヤフト等の回転軸に固定される内
側の剛性円筒部材と、この部材に対して半径方向
外側に且つ同心的に配置されるダンパーマスとし
ての外側の剛性円筒部材とを含み、更にこれら２
つの円筒部材の間に緩衝体としてのゴムなどの弾
性材料からなる円筒状の弾性体が介装されて、こ
の弾性体により前記ねじり振動が吸収されるよう
になつている。 In general, the crankshaft of an internal combustion engine is subject to complex torsional vibrations, so a countermeasure has been considered in which a cylindrical torsional damper is attached to the crankshaft or the like to absorb the torsional vibrations. This torsional damper includes an inner rigid cylindrical member fixed to a rotating shaft such as a crankshaft, and an outer rigid cylindrical member serving as a damper mass arranged radially outward and concentrically with respect to this member. and further includes these two
A cylindrical elastic body made of an elastic material such as rubber is interposed as a buffer between the two cylindrical members, and the torsional vibrations are absorbed by this elastic body.
しかしながら、従来のトーシヨナルダンパーに
あつては、ねじり振動の吸収によつて弾性体内に
蓄積された熱は弾性体の大気と接する面積が小さ
いために充分に放散されず、それ故この熱によつ
て弾性体の熱劣化が早められて、温度の上昇に従
つてロスフアクターが小さくなり、以てトルク変
動の吸収動力が早期に低下してさまう問題点があ
つた。 However, in conventional torsional dampers, the heat accumulated in the elastic body due to the absorption of torsional vibrations is not sufficiently dissipated because the area of the elastic body in contact with the atmosphere is small. This has led to the problem that thermal deterioration of the elastic body is accelerated, and as the temperature rises, the loss factor becomes smaller, resulting in an early decrease in the power to absorb torque fluctuations.
このため、かかる弾性体内部の熱を速やかに外
部へ放散せしめる手段として、実開昭56−151551
号公報には、熱伝導率の高い金属薄板などの放熱
部材がその一部を弾性体の外部へ露出した状態で
弾性体の内部に埋設された構造のものが明らかに
され、また該放熱部材として中空管を埋設するこ
とも明らかにされているのであるが、そこにおい
て、該弾性体はあくまでもクランクシヤフト等の
回転軸と一体に回転するものであるため、放熱部
材も該弾性体の外部へ突出した状態で回転するこ
ととなるところから、点検修理の作業員やドライ
バーが不慮の災害をこうむる虞があり、これが安
全上において重大な問題となつていたのである。 For this reason, as a means to quickly dissipate the heat inside such an elastic body to the outside,
The publication discloses a structure in which a heat dissipating member such as a thin metal plate with high thermal conductivity is buried inside an elastic body with a part of it exposed to the outside of the elastic body, and the heat dissipating member is It has also been revealed that hollow tubes can be buried as a method, but in this case, since the elastic body rotates integrally with the rotating shaft of the crankshaft, the heat dissipation member is also placed outside the elastic body. Since the vehicle rotates with its protruding head, there is a risk that inspection and repair workers and drivers may suffer an unexpected accident, and this has become a serious safety problem.
また、目的とする振動減衰のためには、弾性体
には一定のバネ定数が必要とされ、そして一定の
バネ硬さが要請されるのであるが、そのためには
該弾性体の厚みが規制されることとなるのであ
り、それ故前記実開昭56−151551号公報に明らか
にされた如き放熱部材のような剛体を埋設するこ
とが困難となり、また埋設し得たとしても、該放
熱部材と内外の剛性円筒部材との間の弾性体層が
著しく薄くなつて所期の振動減衰効果を達成し得
なくなる問題も内在しているのである。 In addition, in order to achieve the desired vibration damping, the elastic body needs to have a certain spring constant and a certain spring hardness, but in order to achieve this, the thickness of the elastic body is regulated. Therefore, it becomes difficult to bury a rigid body such as a heat dissipating member as disclosed in the above-mentioned Japanese Utility Model Publication No. 56-151551, and even if it can be buried, the heat dissipating member and There is also the inherent problem that the elastic layer between the inner and outer rigid cylindrical members becomes extremely thin, making it impossible to achieve the desired vibration damping effect.
この考案は、かかる事情を背景として為された
ものであり、捩り振動を受けて発熱する弾性シー
トを効果的に冷却せしめて、トルク変動の吸収性
能の低下を極めて有効に防止し得る円筒形トーシ
ヨナルダンパを提供することを目的とするもので
ある。 This idea was made against this background, and it is a cylindrical torsion that can effectively cool the elastic sheet that generates heat when subjected to torsional vibration, and can extremely effectively prevent a decrease in the absorption performance of torque fluctuations. The purpose is to provide a lateral damper.
そして、かかる目的を達成のために、本考案に
あつては、幅方向に延びる溝が長手方向に適宜の
間隔をもつて片面若しくは両面に設けられてなる
弾性シーとを、その両端部を突き合わせるように
して円筒形と為し、そしてこの円筒形の弾性シー
トを、所定の予備圧縮率の下に、相重合せしめら
れる内外２つの剛性円筒部材の間に介装、固定せ
しめてなり、該弾性シートの片面若しくは両面に
設けられた幅方向の溝によつて前記剛性円筒部材
との間に軸方向に多数の貫通穴が形成されるよう
にしたことにある。 In order to achieve this purpose, in the present invention, an elastic seam is provided with grooves extending in the width direction on one or both sides at appropriate intervals in the longitudinal direction, and both ends of the elastic seam are butted together. This cylindrical elastic sheet is interposed and fixed between two rigid cylindrical members, an inner and outer member, which are overlapped with each other under a predetermined preliminary compression ratio. A large number of through holes are formed in the axial direction between the elastic sheet and the rigid cylindrical member by widthwise grooves provided on one or both sides of the elastic sheet.
このように、本考案に従えば、弾性シートの片
面若しくは両面に幅方向の多数の溝が形成され
て、該弾性シートの表面積が著しく拡大された状
態において、２つの剛性円筒部材間に介装せしめ
られ、そして軸心方向に多数の貫通孔が形成され
ることとなるため、弾性シートの内部に発生した
熱はそれら多数の貫通孔を通じて効果的に外部へ
放出せしめられ得るのであり、以て該弾性シート
が異常に高温となるのを極めて有効に防止し得る
こととなり、それ故に、弾性シートの温度の上昇
によるトルク変動の吸収能力の低下を効果的に阻
止し得ることとなつたのである。 As described above, according to the present invention, a large number of grooves in the width direction are formed on one or both sides of the elastic sheet, and in a state where the surface area of the elastic sheet is significantly expanded, it is possible to insert the elastic sheet between two rigid cylindrical members. Since the elastic sheet is tightened and a large number of through holes are formed in the axial direction, the heat generated inside the elastic sheet can be effectively released to the outside through the large number of through holes. It became possible to extremely effectively prevent the elastic sheet from becoming abnormally high temperature, and therefore, it became possible to effectively prevent a decrease in the ability to absorb torque fluctuations due to an increase in the temperature of the elastic sheet. .
また、かかる構成によれば、従来の如き放熱部
材を埋め込むものでないために、２つの剛性円筒
部材間における弾性シートの厚さを充分に確保す
ることが出来る利点があり、それ故所期の振動吸
収効果を充分に発揮することが出来る他、各種の
且つ多数の貫通孔を極めて簡単に形成し得る大き
な利点があるのである。すなわち、弾性シートの
長手方向に所定の間隔をおいて任意の溝を設けて
おけば、該任意の溝に応じた貫通孔が剛性円筒部
材への圧入と同時に形成されるのである。 Further, according to this configuration, since the heat dissipation member is not embedded as in the conventional case, there is an advantage that a sufficient thickness of the elastic sheet between the two rigid cylindrical members can be ensured, and therefore the vibration of the In addition to being able to fully exhibit the absorption effect, it has the great advantage that various and large numbers of through holes can be formed extremely easily. That is, if arbitrary grooves are provided at predetermined intervals in the longitudinal direction of the elastic sheet, through holes corresponding to the arbitrary grooves can be formed at the same time as the elastic sheet is press-fitted into the rigid cylindrical member.
以下、本考案に係る円筒形トーシヨナルダンパ
の一実施例を、図面に基づいて、更に詳しく説明
する。 Hereinafter, one embodiment of the cylindrical torsional damper according to the present invention will be described in more detail based on the drawings.
先ず、第１図、第２図において、１０はＶプー
リ兼用の円筒形トーシヨナルダンパであり、その
中央部に位置するプーリ本体２（内側の剛性円筒
部材）は図示しないクランクシヤフトに取り付け
られてこれと共に回転するもので、同シヤフトに
嵌合されるボス部４と、該ボス部４から半径方向
外側に延び出すリブ６と、該リブ６の先端におい
て円筒状をなすハブ８から成り、またボス部４内
周には動力伝達部となるべきキー溝９が設けられ
ている。そして、かかるプーリ本体２の外側に
は、Ｖベルト駆動用のプーリである外輪１２（外
側の剛性円筒部材）が配置され、この外輪１２と
プーリ本体２との間にゴムなどの弾性材料からな
る弾性シート１４（弾性円筒部材）が介装されて
いる。また、外輪１２には、円周方向に沿つて２
条のＶ溝１６，１６が設けられており、クランク
シヤフトからの駆動力を後続部材に伝達すべきＶ
ベルトがこれに巻き掛けられるようになつてい
る。 First, in FIGS. 1 and 2, 10 is a cylindrical torsional damper that also serves as a V-pulley, and the pulley body 2 (inner rigid cylindrical member) located in the center is attached to a crankshaft (not shown). It rotates together with the shaft, and consists of a boss part 4 fitted to the shaft, a rib 6 extending radially outward from the boss part 4, and a cylindrical hub 8 at the tip of the rib 6. A keyway 9 is provided on the inner periphery of the boss portion 4 to serve as a power transmission portion. An outer ring 12 (outer rigid cylindrical member), which is a pulley for driving a V-belt, is arranged on the outside of the pulley main body 2, and is made of an elastic material such as rubber between the outer ring 12 and the pulley main body 2. An elastic sheet 14 (elastic cylindrical member) is interposed. In addition, the outer ring 12 has two parts along the circumferential direction.
V grooves 16, 16 are provided in the strips, and V grooves 16, 16 are provided to transmit the driving force from the crankshaft to the succeeding member.
A belt can be wrapped around it.
ところで、前記弾性シート１４は、第３図に示
されるように、長さＬ、幅Ｗ、厚さＴのゴムなど
の弾性材料から成り、その両平面に交互に、且つ
長手方向に適宜の間隔をもつて多数の溝２０が幅
Ｗ方向に刻設されており、そして第４図に示され
るように、その長手方向の両端部を突き合わせる
ようにして円筒形と為したものである。そして、
この弾性シート１４を前記プーリ本体２と外輪１
２との間に、所定の予備圧縮率（一般に、（Ｔ−
ｔ）／Ｔ＝0.09〜0.3程度の値が採用される）の
下に圧入（または圧入と接着）により固定せしめ
ることによつて、多数の貫通穴１８がプーリ本体
２の軸方向に形成されるのである。 By the way, as shown in FIG. 3, the elastic sheet 14 is made of an elastic material such as rubber and has a length L, a width W, and a thickness T. A large number of grooves 20 are cut in the width W direction, and as shown in FIG. 4, the grooves 20 are formed into a cylindrical shape with both longitudinal ends facing each other. and,
This elastic sheet 14 is attached to the pulley main body 2 and the outer ring 1.
2, a predetermined preliminary compression ratio (generally, (T-
A large number of through holes 18 are formed in the axial direction of the pulley body 2 by press-fitting (or press-fitting and gluing) under the pulley body 2. It is.
従つて、このように構成されたトーシヨナルダ
ンパ１０にあつては、慣性体としての外輪１２及
び弾性シート１４の作用によつて、クランクシヤ
フトのトルク変動に基づくねじり振動を吸収する
のであるが、この弾性シート１４は振動減衰作用
をなす過程において内部発熱を惹起するのであ
る。而して、弾性シート１４の上下面に交互に設
けられた多数の溝２０が前記バブ８または外輪１
２に圧接させられて、軸方向に貫通する多数の貫
通穴１８を形成しているところから、該貫通孔１
８によつて弾性シート１４の内部に発生する熱は
逐次外気中へ効果的に放散せしめられることとな
るのである。 Therefore, in the torsional damper 10 configured in this manner, torsional vibrations due to torque fluctuations of the crankshaft are absorbed by the action of the outer ring 12 and the elastic sheet 14 as inertial bodies. This elastic sheet 14 causes internal heat generation in the process of achieving a vibration damping effect. Thus, a large number of grooves 20 alternately provided on the upper and lower surfaces of the elastic sheet 14 are connected to the bub 8 or the outer ring 1.
2 to form a large number of through holes 18 passing through in the axial direction.
8, the heat generated inside the elastic sheet 14 is effectively dissipated into the outside air.
しかも、放熱用の溝２０を配設する場所は弾性
シート１４の両面であつて充分な面積を確保でき
るので、所望の数量の溝２０を所望の形状に設置
することができ、従つて放熱のための表面積を極
めて大きく取り得て、放熱効果を格段に高めるこ
とができるのである。また、溝２０が弾性シート
１４の表面に配されているところから、該弾性シ
ート１４の厚さを充分に取り得て、その振動吸収
作用を充分に発揮させ得るのであり、特にそのよ
うな作用効果は本実施例の如く両面に配される溝
２０が交互に位置させられるときにより一層高め
られ得るのである。 Moreover, since the grooves 20 for heat radiation can be arranged on both sides of the elastic sheet 14 and a sufficient area can be secured, a desired number of grooves 20 can be installed in a desired shape, and therefore, the grooves 20 for heat radiation can be installed in a desired number. This allows for an extremely large surface area for heat dissipation, and greatly enhances the heat dissipation effect. Furthermore, since the grooves 20 are arranged on the surface of the elastic sheet 14, the elastic sheet 14 can be sufficiently thick and its vibration absorbing effect can be fully exhibited. can be further increased when the grooves 20 arranged on both sides are alternately positioned as in this embodiment.
以上のごとく、本実施例では、弾性シート１４
の両面に交互に多数の溝２０を刻設し、これをプ
ーリ本体２と外輪１２との間に圧入固定すること
によつて、多数の貫通穴１８を形成せしめること
により、弾性シート１４の内部に発生する熱を極
めて広い表面積の放熱部分から速やかに放散せし
め、熱蓄積を防止し、弾性シート１４の熱劣化を
阻止し、そして該トーシヨナルダンパ２のねじり
振動を吸収する能力を長期にわたり持続せしめる
ことが可能となつたのである。 As described above, in this embodiment, the elastic sheet 14
By forming a large number of grooves 20 alternately on both sides of the elastic sheet 14 and press-fitting and fixing the grooves between the pulley main body 2 and the outer ring 12, a large number of through holes 18 are formed. The heat generated in the torsional damper 2 is quickly dissipated from the heat dissipating portion with an extremely wide surface area, preventing heat accumulation, preventing thermal deterioration of the elastic sheet 14, and maintaining the ability of the torsional damper 2 to absorb torsional vibration for a long period of time. It became possible to force them to do so.
なお、上述の実施例においては、幅方向の溝２
０は弾性シート１４の両面に長手方向に交互に位
置するように設けられ、弾性シート１４の均等な
放熱を可能とするようにされているのであるが、
本考案は何等これに限定されるものではなく、一
般に長手方向に適宜な間隔をもつて片面若しくは
両面に設けられてよいのであり、また、外側の剛
性円筒部材にＶプーリを設けた例を示したが、こ
れに限らず平ベルト用のプーリまたはフライホイ
ール、其他一般の剛性円筒部材であれば何等支障
はないのである。 In addition, in the above-mentioned embodiment, the groove 2 in the width direction
0 are provided alternately in the longitudinal direction on both sides of the elastic sheet 14 to enable uniform heat dissipation of the elastic sheet 14.
The present invention is not limited to this in any way; in general, it may be provided on one or both sides at appropriate intervals in the longitudinal direction, and an example in which a V-pulley is provided on the outer rigid cylindrical member is shown. However, the material is not limited to this, and any pulleys or flywheels for flat belts, or other general rigid cylindrical members may be used without any problem.
更にまた、Ｖプーリ等のごとく、クランクシヤ
フト等の回転軸に対して直角方向の引張力を受け
る外側の剛性円筒部材の場合においては、溝の形
状と予備圧縮率を適切に選ぶことにより、弾性シ
ートに所謂呼吸作用をさせて、その内部に発生す
る熱を強制的に外気中へ放散せしめ、放熱効果を
高めることができる。なお、前記呼吸作用とは、
外側の剛性円筒部材の回転にもとづき弾性シート
が受ける周期的圧縮力により、溝が圧潰され、次
に元の形状に復帰することを繰り返すことによつ
て、貫通穴１８に対して空気が繰り返し流入、排
出させられることを言うものである。 Furthermore, in the case of outer rigid cylindrical members such as V-pulleys that are subjected to tensile force in a direction perpendicular to the rotating shaft of a crankshaft, elasticity can be improved by appropriately selecting the groove shape and preliminary compression ratio. It is possible to make the sheet have a so-called breathing action and forcibly dissipate the heat generated inside the seat into the outside air, thereby increasing the heat dissipation effect. In addition, the above-mentioned respiratory action is
Due to the periodic compressive force applied to the elastic sheet based on the rotation of the outer rigid cylindrical member, the groove is crushed and then returns to its original shape, which is repeated, thereby causing air to repeatedly flow into the through hole 18. , refers to being discharged.
また、上述のほか、本考案には、その趣旨を逸
脱しない範囲内において、当業者の知識に基づい
て種々なる変形・改良などを加え得ることは言う
までもないところである。 In addition to the above, it goes without saying that various modifications and improvements can be made to the present invention based on the knowledge of those skilled in the art without departing from the spirit thereof.
第１図は、本考案に係る円筒形トーシヨナルダ
ンパの一実施例を示す半截正面図、第２図は第１
図における−断面図、第３図は弾性シートを
示す斜視図、第４図は円筒状に突き合わせた弾性
シートを示す斜視図である。
２：プーリ本体（内側の剛性円筒部材）、１
０：トーシヨナルダンパ、１２：外輪（外側の剛
性円筒部材）、１４：弾性シート、１８：貫通穴、
２０：溝。
FIG. 1 is a half-cut front view showing an embodiment of a cylindrical torsional damper according to the present invention, and FIG.
3 is a perspective view showing an elastic sheet, and FIG. 4 is a perspective view showing elastic sheets pressed together in a cylindrical shape. 2: Pulley body (inner rigid cylindrical member), 1
0: torsional damper, 12: outer ring (outer rigid cylindrical member), 14: elastic sheet, 18: through hole,
20: Groove.
Claims (1)
もつて片面若しくは両面に設けられてなる弾性
シートを、その両端部を突き合わせるようにし
て円筒形と為し、そしてこの円筒形の弾性シー
トを、所定の予備圧縮率の下に、相重合せしめ
られる内外２つの剛性円筒部材の間に介装、固
定せしめてなり、該弾性シートの片面若しくは
両面に設けられた軸方向の溝によつて前記剛性
円筒部材との間に軸方向に多数の貫通穴が形成
されていることを特徴とする円筒形トーシヨナ
ルダンパ。 (2) 前記幅方向の溝が、前記弾性シートの両面に
長手方向に交互に位置するように設けられてい
る実用新案登録請求の範囲第１項記載のトーシ
ヨナルダンパ。 (3) 前記内側の剛性円筒部材が回転軸に取り付け
られるプーリ本体であり、且つ前記外側の剛性
円筒部材がベルト駆動用の外輪である実用新案
登録請求の範囲第１項または第２項記載のトー
シヨナルダンパ。[Claims for Utility Model Registration] (1) An elastic sheet in which grooves extending in the width direction are provided on one or both sides at appropriate intervals in the longitudinal direction is formed into a cylindrical shape by butting both ends of the elastic sheet. Then, this cylindrical elastic sheet is interposed and fixed between two rigid cylindrical members, an inner and an outer member, which are overlapped with each other under a predetermined preliminary compression ratio, and one or both sides of the elastic sheet are A cylindrical torsional damper characterized in that a large number of through holes are formed in the axial direction between the rigid cylindrical member and the axial groove provided therein. (2) The torsional damper according to claim 1, wherein the widthwise grooves are provided on both sides of the elastic sheet so as to be alternately located in the longitudinal direction. (3) The utility model according to claim 1 or 2, wherein the inner rigid cylindrical member is a pulley body attached to a rotating shaft, and the outer rigid cylindrical member is an outer ring for driving a belt. torsional damper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4723082U JPS58149646U (en) | 1982-03-31 | 1982-03-31 | Cylindrical torsional damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4723082U JPS58149646U (en) | 1982-03-31 | 1982-03-31 | Cylindrical torsional damper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58149646U JPS58149646U (en) | 1983-10-07 |
| JPH0144834Y2 true JPH0144834Y2 (en) | 1989-12-25 |
Family
ID=30058198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4723082U Granted JPS58149646U (en) | 1982-03-31 | 1982-03-31 | Cylindrical torsional damper |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58149646U (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6067449U (en) * | 1983-10-14 | 1985-05-13 | トヨタ自動車株式会社 | Internal combustion engine damper pulley |
| JPH0227710Y2 (en) * | 1985-09-06 | 1990-07-26 | ||
| JP2811992B2 (en) * | 1990-03-31 | 1998-10-15 | 東海ゴム工業株式会社 | Rubber Elastic Mold for Torsion Damper |
-
1982
- 1982-03-31 JP JP4723082U patent/JPS58149646U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58149646U (en) | 1983-10-07 |
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