JPH0914396A - Metallic gear - Google Patents

Metallic gear

Info

Publication number
JPH0914396A
JPH0914396A JP7162405A JP16240595A JPH0914396A JP H0914396 A JPH0914396 A JP H0914396A JP 7162405 A JP7162405 A JP 7162405A JP 16240595 A JP16240595 A JP 16240595A JP H0914396 A JPH0914396 A JP H0914396A
Authority
JP
Japan
Prior art keywords
gear
metallic
gears
metal
base compound
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP7162405A
Other languages
Japanese (ja)
Inventor
Shuhei Yamaguchi
口 修 平 山
Toshikuni Kusano
野 敏 邦 草
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aisin Corp
Original Assignee
Aisin Seiki Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Aisin Seiki Co Ltd filed Critical Aisin Seiki Co Ltd
Priority to JP7162405A priority Critical patent/JPH0914396A/en
Priority to DE19625892A priority patent/DE19625892A1/en
Priority to FR9607976A priority patent/FR2736126B1/en
Publication of JPH0914396A publication Critical patent/JPH0914396A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/041—Coatings or solid lubricants, e.g. antiseize layers or pastes
    • 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
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/06—Use of materials; Use of treatments of toothed members or worms to affect their intrinsic material properties
    • 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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/0006—Vibration-damping or noise reducing means specially adapted for gearings

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Gears, Cams (AREA)

Abstract

PURPOSE: To reduce metallic noise generated at the time when two gears are engaged with each other by applying a metallic base compound material containing particulates of a solid lubricant on a surface of a tooth part of a metallic gear. CONSTITUTION: A metallic base compound material 12 containing particulates of a solid lubricant is applied on a whole surface of a tooth part 11 of a metallic gear 10. The metallic gear 10 is covered with a roughly shaped material of carbon steel (S45C) on a surface of the tooth part of the metallic gear 10 equivalent to a gear precision 5 class hobbing worked after cutting work and with a nickel base compound material (metallic base compound material 12) containing 23 volume % of particulates of PTFC (fluororesin) having a solid lubricating function by a plating method. Thereafter, heat treatment is applied to this gear (300 deg.C, one hour). At the time when two metallic gears are rotated while being engaged with each other, these covering materials become a cushion. Additionally, the covering materials become conformable and gradually tooth contact improves. Consequently, it is possible to reduce uncomfortable metallic noise generated at the time when the gears are engaged with each other.

Description

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

【０００１】[0001]

【産業上の利用分野】本発明は、金属製の歯部の表面に
被覆層を形成する金属歯車に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal gear having a coating layer formed on the surfaces of metal teeth.

【０００２】[0002]

【従来の技術】従来、歯車の噛み合い時に発生する不快
な金属音を低減させる方法として樹脂製の歯車が知られ
ている。例えば、歯車を高強度な樹脂で形成し、歯車の
歯部の表面に低騒音性の樹脂を射出成形により形成する
歯車が特開平４−１９３５１１号公報に開示されてい
る。上記公報に開示される歯車は、歯部の表面に低騒音
性の樹脂を被覆することにより、高負荷が掛かる部分の
高強度化と、耐摩耗性又は耐騒音性を必要とする部分の
低騒音化とを実現した歯車を提供できる、という効果を
奏するものである。しかし、金属歯車と比較すると強度
的に弱いため、高強度を必要とする歯車に用いることは
できない。2. Description of the Related Art Heretofore, resin gears have been known as a method of reducing unpleasant metallic noise generated when gears mesh with each other. For example, Japanese Unexamined Patent Publication No. 4-193511 discloses a gear in which a gear is made of high-strength resin and a resin with low noise is formed on the tooth surface of the gear by injection molding. The gear disclosed in the above publication has a surface of a tooth portion coated with a resin having low noise characteristics to enhance strength of a portion to which a high load is applied, and to reduce abrasion of a portion requiring wear resistance or noise resistance. The effect is that a gear that realizes noise reduction can be provided. However, since it is weaker in strength than metal gears, it cannot be used for gears requiring high strength.

【０００３】そこで、高強度の歯車を必要とする場合に
は金属歯車を使用せざるを得ない。Therefore, if a high-strength gear is required, a metal gear must be used.

【０００４】しかし、金属歯車においては、２つの歯車
が噛み合う時に不快な金属音が発生する。この不快な金
属音を低減する方法としては、金属歯車の歯部を高精度
に加工する方法があるが、この不快な金属音を低減する
ほどの精密加工をする場合には、歯車の加工コストが大
幅に増大してしまう、という問題点があった。However, in a metal gear, an unpleasant metal sound is generated when the two gears mesh with each other. As a method of reducing this unpleasant metallic noise, there is a method of processing the tooth portion of the metal gear with high precision. However, when performing precision machining to reduce this unpleasant metallic noise, the machining cost of the gear However, there is a problem in that

【０００５】[0005]

【本発明が解決しようとする課題】そこで本発明は、金
属歯車の加工コストを増大させることなく、２つの歯車
が噛み合う時に発生する金属音を大幅に低減することを
技術的課題とする。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to significantly reduce the metallic noise generated when two gears mesh with each other without increasing the processing cost of the metallic gear.

【０００６】[0006]

【課題を解決するための手段】上記課題を解決するため
に請求項１の発明は、金属歯車の歯部の表面に固体潤滑
剤の粒子を含有する金属基複合体を被覆した。In order to solve the above problems, the invention of claim 1 coats the surface of the tooth portion of the metal gear with a metal matrix composite containing particles of a solid lubricant.

【０００７】請求項１に加えて請求項２は、金属歯車の
歯部に被覆される金属基複合体を熱処理した。In addition to the first aspect, the second aspect heat-treats the metal matrix composite coated on the teeth of the metal gear.

【０００８】ここで、固体潤滑剤とは、例えばグラファ
イトやフッ素樹脂、２硫化モリブデン、フッ化黒鉛等で
あり、上記固体潤滑剤を含有する金属材料としては、ニ
ッケル、アルミニウム、鉄、銅等である。Here, the solid lubricant is, for example, graphite, fluororesin, molybdenum disulfide, graphite fluoride, or the like, and the metal material containing the solid lubricant is nickel, aluminum, iron, copper, or the like. is there.

【０００９】[0009]

【作用】請求項１の発明によると、金属歯車の歯部の表
面に固体潤滑剤の粒子を含有する金属基複合体を被覆材
として被覆することにより、２つの金属歯車が噛み合う
際に、この被覆材がクッションとなる。また、歯車の噛
み合いにより被覆材が馴染み、徐々に歯当たりがよくな
る。この２つの作用により、歯車が噛み合う際に発生す
る不快な金属音を低減することができる。According to the first aspect of the present invention, the surface of the tooth portion of the metal gear is coated with the metal-based composite containing the particles of the solid lubricant as a coating material. The covering serves as a cushion. Further, the meshing of the gears makes the covering material fit in, and the tooth contact gradually improves. With these two effects, it is possible to reduce the unpleasant metallic noise generated when the gears mesh with each other.

【００１０】更に、歯車の噛み合いにより被覆材が馴染
むため、歯車の歯部を高精度に加工することなく不快な
金属音を低減することができる。Further, since the covering material fits in due to the meshing of the gears, unpleasant metallic noise can be reduced without processing the gear teeth with high precision.

【００１１】また、固体潤滑剤の材質及び含有量の少な
くとも一方を変化させることによって、被覆材の硬度を
変えることが可能になる。このように、歯車の使用環境
に応じて適切な硬さの被覆材を選定することにより、不
快な金属音を低減することができる。Further, the hardness of the coating material can be changed by changing at least one of the material and the content of the solid lubricant. Thus, by selecting a coating material having an appropriate hardness according to the usage environment of the gear, it is possible to reduce unpleasant metallic noise.

【００１２】請求項２によると、請求項１の作用に加え
て被覆材を高硬度とすることが可能になる。According to the second aspect, in addition to the effect of the first aspect, it becomes possible to make the coating material high in hardness.

【００１３】[0013]

【実施例】以下、本発明の金属歯車の一実施例を図面を
参照して説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the metal gear of the present invention will be described below with reference to the drawings.

【００１４】図１は、本発明の実施例に係る金属歯車の
要部断面図である。実施例の金属歯車としては、インボ
リュートはすば歯車を使用する。金属歯車１０は他の歯
車と噛み合いながら回転するもので、その歯部１１の全
表面には噛み合う際に発生する不快な金属音を低減する
ために固体潤滑剤の粒子を含む金属基複合体１２が被覆
されている。FIG. 1 is a sectional view of a main part of a metal gear according to an embodiment of the present invention. An involute helical gear is used as the metal gear of the embodiment. The metal gear 10 rotates while meshing with other gears, and the entire surface of the tooth 11 has a metal-based composite 12 containing particles of a solid lubricant in order to reduce unpleasant metal noise generated when meshing. Are covered.

【００１５】金属歯車１０の第１実施例は、炭素鋼（Ｓ
４５Ｃ）の粗形材を、切削加工後にホブ加工した歯車精
度５級相当の金属歯車の歯部１１の表面に、固体潤滑機
能を有するＰＴＦＥ（フッ素樹脂）の粒子を２３体積％
含有するニッケル基複合材（金属基複合体１２）を、メ
ッキ法にて被覆したものである。この歯車をＡ1 ギアと
し、Ａ1 ギアに熱処理（３００℃、１時間）を行ったも
のをＡ2 ギアとする。The first embodiment of the metal gear 10 is made of carbon steel (S
45 C) rough material is subjected to hobbing after cutting, and 23% by volume of particles of PTFE (fluorine resin) having a solid lubricating function is formed on the surface of the tooth portion 11 of the metal gear corresponding to the gear precision 5th grade.
The nickel-based composite material (metal-based composite 12) contained is coated by a plating method. This gear is referred to as the A 1 gear, and the A 1 gear subjected to heat treatment (300 ° C., 1 hour) is referred to as the A 2 gear.

【００１６】熱処理によって被覆膜の硬度を上昇するこ
とができ、ギアの使用環境に応じて変えることができ
る。The hardness of the coating film can be increased by the heat treatment and can be changed according to the usage environment of the gear.

【００１７】金属歯車１０の第２実施例は、炭素鋼（Ｓ
４５Ｃ）の粗形材を、切削加工後にホブ加工した歯車精
度５級相当の金属歯車の歯部１１の表面に、固体潤滑機
能を有するグラファイト粒子を５０重量％含有するアル
ミニウム基複合材（金属基複合体１２）を溶射にて被覆
したものである。この歯車をＢギアとする。The second embodiment of the metal gear 10 is made of carbon steel (S
An aluminum-based composite material (metal base material) containing 50% by weight of graphite particles having a solid lubricating function on the surface of the tooth portion 11 of a metal gear corresponding to a gear precision grade 5 obtained by hobbing a rough shape material of 45C) after cutting. The composite 12) is coated by thermal spraying. This gear is called B gear.

【００１８】次に、第１実施例および第２実施例の歯車
を従来の金属歯車と比較する。従来の金属歯車は、粗形
材を切削加工、ホブ加工後にシェービング加工、イオン
窒化を行った歯車精度２級相当のものである。この歯車
をＣギアとする。Next, the gears of the first and second embodiments will be compared with a conventional metal gear. The conventional metal gear corresponds to a gear precision class 2 in which a rough material is subjected to cutting, hobbing, shaving, and ion nitriding. This gear is called C gear.

【００１９】表１は第１実施例及び第２実施例の歯車と
従来の歯車を、異音評価した結果を示したものある。評
価方法としては、Ａ1 ギア、Ａ2 ギア、Ｂギア及びＣギ
アの４種類の歯車を、２０００〜４０００ｒｐｍで一次
噛み合い音を測定した。Table 1 shows the results of abnormal noise evaluation of the gears of the first and second embodiments and the conventional gear. As an evaluation method, four types of gears, A 1 gear, A 2 gear, B gear, and C gear, were measured for primary meshing sound at 2000 to 4000 rpm.

【００２０】[0020]

【表１】 [Table 1]

【００２１】表１より、歯車精度の低い歯車の歯部の表
面に金属基複合体を被覆したＡ1 ギア、Ａ2 ギア及びＢ
ギアの一次噛み合い音（各ギアが噛み合う時に発生する
不快な金属音）は、被覆を行っていないＣギアのそれと
比べて、低減していることがわかる。From Table 1, it can be seen from the Table 1 that the tooth surface of the gear with low gear precision is coated with a metal-based composite on the A 1 gear, A 2 gear and B
It can be seen that the primary meshing sound of the gears (an unpleasant metallic sound generated when the gears mesh with each other) is reduced as compared with that of the uncoated C gear.

【００２２】その理由として、上記のような金属基複合
体を歯部の表面に被覆した歯車は、母材の歯車精度が低
い場合、即ち歯形形状が悪く、歯当たりが悪い場合にお
いても、２つの金属歯車が噛み合いながら回転する際に
この被覆材がクッションとなるとともに、歯車が噛み合
ううちに被覆材の自己修復機能により、歯当たりが徐々
によくなることが考えられる。The reason for this is that the gear having the tooth-based surface coated with the metal-based composite as described above has a problem that when the precision of the base material is low, that is, the tooth profile is poor and the tooth contact is poor, It is conceivable that when the two metal gears rotate while meshing with each other, the coating material serves as a cushion, and the tooth contact gradually improves due to the self-repairing function of the coating material while the gears mesh with each other.

【００２３】本発明によると、金属歯車に固体潤滑剤の
粒子を含有する金属基複合体を被覆することによって、
使用環境によっては従来行っていたイオン窒化や浸炭焼
き入れ等の金属表面を硬くするための工程が不要にな
る。また、歯車の噛み合いにより被覆材が馴染むため、
歯車の歯部を高精度に加工する必要がなくなる。従っ
て、歯車の製造工程を削減し、加工コストを低減するこ
とができる。According to the present invention, by coating a metal gear with a metal matrix composite containing particles of a solid lubricant,
Depending on the use environment, the conventional steps such as ion nitriding and carburizing to harden the metal surface are unnecessary. Also, because the covering material fits in due to the meshing of the gears,
It is not necessary to machine the tooth portion of the gear with high precision. Therefore, the manufacturing process of the gear can be reduced, and the processing cost can be reduced.

【００２４】第１実施例および第２実施例では固体潤滑
機能を有する粒子の材質及び含有量を明記したが、特に
この材質及び含有量に限定する意図はなく、歯車の使用
環境に応じて適切な材質及び含有量を選定して、不快な
金属音を低減することができる。In the first and second embodiments, the material and the content of the particles having the solid lubrication function are specified, but there is no particular intention to limit the material and the content, and it is appropriate according to the environment of use of the gear. It is possible to reduce unpleasant metallic noise by selecting various materials and contents.

【００２５】被覆の方法として、本実施例ではメッキ法
と溶射を用いたが、特にこの方法に限定する必要はな
く、被覆材が歯部に被覆されればどのような方法でもよ
い。As the coating method, the plating method and the thermal spraying are used in the present embodiment, but it is not particularly limited to this method, and any method can be used as long as the coating material covers the tooth portion.

【００２６】また、本実施例では金属歯車としてインボ
リュートはすば歯車で評価を行ったが、平歯車やかさ歯
車等、金属歯車全般に使用することが可能である。Although involute helical gears were used as the metal gears in this embodiment, they can be used for all metal gears such as spur gears and bevel gears.

【００２７】[0027]

【効果】請求項１によると、金属歯車の歯部の表面に固
体潤滑剤の粒子を含有する金属基複合体を被覆材として
被覆することにより、２つの金属歯車が噛み合いながら
回転する際にこの被覆材がクッションとなる。また、歯
車の噛み合いにより被覆材が馴染み、徐々に歯当たりが
よくなる。この２つの作用により、歯車が噛み合う際に
発生する不快な金属音を低減することができる。According to the first aspect, the surface of the tooth portion of the metal gear is coated with the metal base composite containing the particles of the solid lubricant as a coating material, so that when the two metal gears rotate while meshing with each other, The covering serves as a cushion. Further, the meshing of the gears makes the covering material fit in, and the tooth contact gradually improves. With these two effects, it is possible to reduce the unpleasant metallic noise generated when the gears mesh with each other.

【００２８】また、固体潤滑剤の材質及び含有量の少な
くとも一方を変化させることによって被覆材の硬度を変
えることができ、歯車の使用環境に応じて適切な硬度の
被覆材を選定することができる。The hardness of the coating material can be changed by changing at least one of the material and the content of the solid lubricant, and the coating material having an appropriate hardness can be selected according to the usage environment of the gear. .

【００２９】本発明は、歯車の噛み合いにより被覆材が
馴染み、徐々に歯当たりがよくなるため、歯車の歯部を
高精度に加工する必要がなくなるとともに、使用環境に
よっては金属表面を硬くするための工程も不要になるの
で、歯車の製造工程を削減し、加工コストを低減するこ
とができる。According to the present invention, since the coating material is adapted to the meshing of the gears and the tooth contact is gradually improved, it is not necessary to machine the tooth portions of the gears with high precision, and the metal surface is hardened depending on the use environment. Since no process is required, the manufacturing process of gears can be reduced and the processing cost can be reduced.

【００３０】請求項２によると、請求項１の効果に加え
て、被覆材を熱処理することにより被覆材を高硬度化す
ることが可能になるので、金属歯車の使用環境に応じて
高硬度な金属歯車を提供することができる。According to the second aspect, in addition to the effect of the first aspect, it is possible to increase the hardness of the coating material by heat-treating the coating material, so that the coating material has a high hardness depending on the environment in which the metal gear is used. A metal gear can be provided.

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

【図１】本発明の一実施例の金属歯車の要部断面図であ
る。FIG. 1 is a sectional view of an essential part of a metal gear according to an embodiment of the present invention.

【符号の説明】[Explanation of symbols]

１０・・・金属歯車 １１・・・歯
部 １２・・・金属基複合体10 ... Metal Gear 11 ... Tooth 12 ... Metal Base Composite

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 金属製の歯部の表面に固体潤滑剤の粒子
を含む金属基複合体を被覆してなる金属歯車。1. A metal gear having a metal toothed surface coated with a metal-based composite containing particles of a solid lubricant. 【請求項２】 請求項１の金属歯車において、前記歯部
に被覆される前記金属基複合体を熱処理してなる金属歯
車。2. The metal gear according to claim 1, wherein the metal-based composite body coated on the tooth portion is heat-treated.
JP7162405A 1995-06-28 1995-06-28 Metallic gear Pending JPH0914396A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP7162405A JPH0914396A (en) 1995-06-28 1995-06-28 Metallic gear
DE19625892A DE19625892A1 (en) 1995-06-28 1996-06-27 Metal gear
FR9607976A FR2736126B1 (en) 1995-06-28 1996-06-27 METAL GEAR COVERED WITH COMPOSITE MATERIAL

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7162405A JPH0914396A (en) 1995-06-28 1995-06-28 Metallic gear

Publications (1)

Publication Number Publication Date
JPH0914396A true JPH0914396A (en) 1997-01-14

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Application Number Title Priority Date Filing Date
JP7162405A Pending JPH0914396A (en) 1995-06-28 1995-06-28 Metallic gear

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JP (1) JPH0914396A (en)
DE (1) DE19625892A1 (en)
FR (1) FR2736126B1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09229165A (en) * 1996-02-27 1997-09-02 Nissan Motor Co Ltd Surface smoothening method for gear applied with solid lubricant
CN1086325C (en) * 1996-08-27 2002-06-19 本田技研工业株式会社 Powder preseed body and process therefor
JP2008286350A (en) * 2007-05-21 2008-11-27 Nitta Ind Corp Gear
JP2011052782A (en) * 2009-09-03 2011-03-17 Shin Kobe Electric Mach Co Ltd Resin gear
CN102667137A (en) * 2009-11-23 2012-09-12 罗伯特·博世有限公司 Noise-optimized starter device

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19822931C2 (en) * 1998-05-22 2001-11-22 Daimler Chrysler Ag Process for the adhesive application of a lubricant layer to an exposed and tribologically stressed surface of a gear wheel, in particular gearboxes, and gear wheel with a lubricant layer adhering to an exposed surface
DE19955474C1 (en) * 1999-11-18 2001-07-26 Bayerische Motoren Werke Ag Method for setting a tooth flank backlash in a gear transmission, in particular for balance shafts of internal combustion engines
FR2835228A1 (en) * 2002-01-29 2003-08-01 Soc Mecanique Irigny Automobile rack and pinion steering unit comprises polymer coating constituting fraction of rack or pinion teeth thickness, remainder being in metal
US11647896B2 (en) * 2019-03-28 2023-05-16 Olympus Corporation Rollerless tubular connector for transferring rotative force from insertion section of endoscope to spiral tube

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6350402A (en) * 1986-08-21 1988-03-03 Toshiba Mach Co Ltd Coating method for wear-resistant material
EP0288677B1 (en) * 1987-04-30 1992-08-19 Balzers Aktiengesellschaft Structural unit, in particular machine element
JPH07113401B2 (en) * 1991-01-30 1995-12-06 株式会社東芝 Gear transmission mechanism for vacuum environment
CH681370A5 (en) * 1992-02-25 1993-03-15 Estoppey Reber S A Solid lubricant coating prodn. for reducing friction between soft parts - by applying nickel@-phosphorus@ layer and gold@ layer and then heat treating

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09229165A (en) * 1996-02-27 1997-09-02 Nissan Motor Co Ltd Surface smoothening method for gear applied with solid lubricant
CN1086325C (en) * 1996-08-27 2002-06-19 本田技研工业株式会社 Powder preseed body and process therefor
JP2008286350A (en) * 2007-05-21 2008-11-27 Nitta Ind Corp Gear
JP2011052782A (en) * 2009-09-03 2011-03-17 Shin Kobe Electric Mach Co Ltd Resin gear
CN102667137A (en) * 2009-11-23 2012-09-12 罗伯特·博世有限公司 Noise-optimized starter device

Also Published As

Publication number Publication date
FR2736126A1 (en) 1997-01-03
FR2736126B1 (en) 1999-05-14
DE19625892A1 (en) 1997-01-02

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