JP4278411B2 - Grease composition for gear lubrication - Google Patents
Grease composition for gear lubrication Download PDFInfo
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Description
【０００１】
【発明の属する技術分野】
本発明は、ギヤ潤滑用グリース組成物に関し、特にラックとピニオン用として好適なギヤ潤滑用グリース組成物及び該グリース組成物により潤滑されたギヤに関する。
【０００２】
【従来の技術】
電動パワーステアリングは電力を動力源とするため油圧式パワーステアリングに比べて出力が小さく、主に小型車用として普及していた。しかし、環境面への関心や省エネ化が進むにつれ、燃費向上に効果がある電動パワーステアリングは中型車にまで普及し、その需要は年々増加傾向にある。
ステアリングには多くの潤滑箇所があるが、特にラックとピニオン部やピニオンアシストタイプ電動パワーステアリング（ＥＰＳ）などのギヤ噛み合い部には大きな圧力がかかり摩耗しやすい。また歯形にそった異常摩耗をバックラッシュと言い、異音発生の原因となっている。
ラックとピニオンの潤滑機構は鋼と鋼との転がり滑りである。このような鋼と鋼による転がり滑りの潤滑機構はギヤ潤滑全般にあてはまり、自動車部品に限らず、機械部品等に多く使用されている。また、自動車、電化製品、精密機器などでは長寿命化、高効率化または低温作動性の向上が求められており、グリースに対して更なる低摩擦係数化、耐摩耗特性、低温性の改良が必要となっている。
【０００３】
ステアリング駆動方式のその殆どが油圧式であり、従来より、ラックとピニオン用グリースとしては鉱物油を基油とした一般的な極圧グリースが用いられてきた。近年、ピニオンアシストタイプ電動パワーステアリングの増加や中型車への普及によってラックとピニオン歯面にかかる面圧が増大し、今までの極圧グリースでは耐久性・耐摩耗性で満足できるレベルではなくなってきた。
また、電動パワーステアリングは油圧式パワーステアリングと比較して出力が小さく、伝達動力の高効率化が常に求められており、特に低温時の作動トルクが大きく作動不良が発生することから、この低温性についても大きな問題となっていた。
このような問題を解決すべくステアリング用グリース組成物が公開されているがコストが高く必ずしも満足されていない（例えば、特許文献１参照）。
【０００４】
【特許文献】
【特許文献１】
特開2001-64665
【０００５】
【発明が解決しようとする課題】
本発明の目的は、ギヤ潤滑用グリース組成物、特にラックとピニオン用として好適なギヤ潤滑用グリース組成物を提供することである。
本発明の他の目的は、ステアリングに求められる過酷な潤滑条件に耐えうる耐摩耗性を有し、かつ低温作動時の作動性に優れた安価なラックとピニオン用として好適なグリース組成物を提供することである。
本発明のさらに他の目的は、上記ギヤ潤滑用グリース組成物により潤滑されたギヤ、特にラックとピニオンを提供することである。
【０００６】
【課題を解決するための手段】
本発明は以下に示すギヤ潤滑用グリース組成物を提供するものである。
１．下記の成分（ａ）〜（ｅ）を含むギヤ潤滑用グリース組成物。
（ａ）増ちょう剤
（ｂ）合成油
（ｃ）鉱油
（ｄ）モリブデンジチオカーバメート（ＭｏＤＴＣ）
（ｅ）Ｃａスルホネート
２．（ｅ）成分が過塩基性Ｃａスルホネートである上記１記載のギヤ潤滑用グリース組成物。
３．（ｂ）成分が合成炭化水素油である上記１又は２記載のギヤ潤滑用グリース組成物。
４．（ａ）成分がＬｉヒドロキシステアレートである上記１〜３のいずれか１項記載のギヤ潤滑用グリース組成物。
５．（ｄ）成分の含有量が０．１〜１０質量％、（ｅ）成分の含有量が０．１〜１０質量％である上記１〜４のいずれか１項記載のギヤ潤滑用グリース組成物。
６．ラックとピニオン用である上記１〜５のいずれか１項記載のギヤ潤滑用グリース組成物。
７．上記１〜６のいずれか１項記載のギヤ潤滑用グリース組成物により潤滑されたギヤ。
８．ラックとピニオンである上記７記載のギヤ。
【０００７】
【発明の実施の形態】
ＭｏＤＴＣとＣａスルホネートの組み合わせを含むグリース組成物は等速ジョイント（ＣＶＪ）用として使用されており、その摩擦低減効果、耐摩耗特性は周知の事実である。しかし、ＭｏＤＴＣとＣａスルホネートの組み合わせを含むグリース組成物をラックとピニオン用として使用された例はなく、従って、その摩擦低減効果、耐摩耗特性を示したという報告もない。
【０００８】
本発明のグリース組成物に使用する成分（ａ）の増ちょう剤としては、全ての増ちょう剤が使用可能である。例えば、Ｌｉ石けんや複合Ｌｉ石けんに代表される石けん系増ちょう剤、ジウレアに代表されるウレア系増ちょう剤、有機化クレイやシリカに代表される無機系増ちょう剤、ＰＴＦＥに代表される有機系増ちょう剤などが挙げられるが、好ましいものはＬｉ石けんであり、具体的にはＬｉヒドロキシステアレートである。
本発明のグリース組成物中の増ちょう剤の量は好ましくは１〜２５質量％、さらに好ましくは３〜２０質量％である。１質量％未満では増ちょう剤効果が小さく、軟らかすぎて潤滑部からの漏えいが問題となる。また２５質量％を超えるとグリース組成物が硬くなりすぎ、潤滑部への流入が無くなり充分な効果を得るのが困難になる。
【０００９】
本発明のグリース組成物中、成分（ｂ）の合成油としては、エステル油、合成炭化水素油、フェニルエーテル、ポリグリコールなど通常グリースの基油として使用されている潤滑油が使用できる。これらのうち特に好ましいものは合成炭化水素油（ポリαオレフィン）である。
本発明のグリース組成物中の合成油の量は好ましくは１０〜６０質量％、さらに好ましくは３０〜４０質量％である。１０質量％未満では被潤滑部材の低温作動性が悪くなる傾向があり、また６０質量％を超えるとコストアップとなり経済的に不利である。
【００１０】
本発明のグリース組成物中、成分（ｃ）の鉱油としては全ての鉱油が使用できる。例えば、精製鉱油、高粘度指数油、脱ロウ鉱油などが挙げられる。特に好ましいものは脱ロウ鉱油である。
本発明のグリース組成物中の鉱油の量は好ましくは３０〜８０質量％、さらに好ましくは５０〜６０質量％である。３０質量％未満ではコストアップが問題となり、また８０質量％を超えると被潤滑部材の低温作動性が悪くなる傾向がある。
【００１１】
本発明のグリース組成物中、成分（ｄ）のＭｏＤＴＣ（モリブデンジチオカーバメート）の好ましい例としては下記の式（１）で表されるものが挙げられる。
（Ｒ1Ｒ2Ｎ−ＣＳ−Ｓ）2−Ｍｏ2ＯｍＳｎ （１）
（式中、Ｒ1およびＲ2は、それぞれ独立して、炭素原子数１〜２４、好ましくは３〜１８のアルキル基を表し、ｍは０〜３、ｎは４〜１であり、ｍ＋ｎ＝４である）
本発明のグリース組成物中のＭｏＤＴＣの量は好ましくは０．１〜１０質量％、さらに好ましくは０．５〜５質量％である。０．１質量％未満では磨耗低減効果が不充分であり、また１０質量％を超えてもさらなる効果の向上は認められない。
【００１２】
本発明のグリース組成物に使用される成分（ｅ）のＣａスルホネートとしては、エンジン油等の潤滑油に用いられる金属系清浄分散剤や防錆剤として使用される全てのＣａスルホネートが使用できる。例えば、潤滑油留分中の芳香族炭化水素成分のスルホン化によって得られる石油スルホン酸のカルシウム塩、ジノニルナフタレンスルホン酸やアルキルベンゼンスルホン酸のような合成スルホン酸のカルシウム塩、石油スルホン酸の過塩基性カルシウム塩、アルキル芳香族スルホン酸の過塩基性カルシウム塩などが挙げられ、好ましいものとしては過塩基性Ｃａスルホネートが挙げられる。
本発明のグリース組成物中のＣａスルホネートの量は好ましくは０．１〜１０質量％、さらに好ましくは０．５〜５質量％である。０．１質量％未満では磨耗低減効果が不充分であり、また１０質量％を超えてもさらなる効果の向上は認められない。
【００１３】
本発明のグリース組成物中、成分（ｄ）のＭｏＤＴＣと成分（ｅ）のＣａスルホネートの合計量は好ましくは０．２〜１０質量％、さらに好ましくは１〜１０質量％である。０．２質量％未満では磨耗低減効果が不充分であり、また１０質量％を超えてもさらなる効果の向上は認められない。
【００１４】
本発明のグリース組成物には必要に応じて種々の添加剤を添加することができる。このような添加剤としては、例えば、酸化防止剤、錆止め剤、金属腐食防止剤、油性剤、耐摩耗剤、極圧剤、固体潤滑剤等が挙げられる。
本発明のグリース組成物は、上記各成分及びその他の添加剤を所望の配合割合で混合することにより容易に製造することができる。
【００１５】
本発明のグリース組成物は、種々の部品の潤滑に使用できるが、ギヤの潤滑に最も適しており、特にラックとピニオン用の潤滑に適している。ラックとピニオンの構成材料は共に鋼で、ラックとピニオンの接触形態は線接触である。
【００１６】
実施例
実施例、比較例の各グリースを以下の表１に示す配合で試作し、物性の評価を行った。結果を表１に示す。
実施例１〜４及び比較例５〜７
基油（成分（ｂ）及び成分（ｃ）（４０対６０））９０２．２ｇに対し、▲１▼ヒドロキシステアリン酸４５０ｇを８０℃で完全溶解させた。別容器に▲２▼水酸化リチウム６４．８ｇを８０℃の純水３２４ｇで完全溶解させ、▲１▼と▲２▼を混合し、１００℃でよく攪拌しながら３０分間反応させ、その後２３０℃まで昇温し、追加油として残りの基油（成分（ｂ）及び成分（ｃ）（４０対６０））１０８３ｇをカロえ、攪拌しながら１００℃以下まで冷却しこれをベースグリースとした（ベースグリースの合計量は２５００ｇ、増ちょう剤量は１８％）。
このベースグリースに表１に示す配合で添加剤を添加し、基油（成分（ｂ）及び成分（ｃ）（４０対６０））を加え、三本ロールミルにてちょう度No.１グレードに調整した（増ちょう剤量は７．０％）。
比較例８
従来からラックとピニオン部に使用されている市販のリチウム石けんを増ちょう剤とした二硫化モリブデン配合の極圧グリース。
【００１７】
グリース組成物の評価試験方法
耐磨耗性（Ｆａｌｅｘ αモデル試験）
リング（外径３５ｍｍ、厚さ９ｍｍ）の上面にブロック（縦１６ｍｍ、横６ｍｍ、厚さ１０ｍｍ）を水平となるように接触させ、リング表面に試料グリースを０．２ｇ塗布し、規定荷重（２９４Ｎ）をかけて、規定時間（６０分）回転させときのブロック表面に形成された磨耗痕の摩耗深さを測定する。
【００１８】
試験条件
試験片 ：リング Ｓ−１０（HRC 58-63, RMS 0.15-0.30μm）
ブロック Ｈ−３０（HRC 27-33，RMS 0.10-0.20μm）
回転数 ：３７ｒｐｍ（リング径３５mm、周速６８mm/s）
荷重 ：２９４Ｎ
試験時間：６０分
判定基準：摩耗深さ（μｍ）
１０μ未満＝○（合格）、１０μｍ以上＝×（不合格）
【００１９】
低温作動性（低温トルク試験：ＪＩＳ Ｋ２２２０ ５ １４）
試験温度：−４０℃
判定基準：起動トルク（Ｎ・ｃｍ）
２０Ｎ・cm未満＝○（合格）、２０Ｎ・cm以上＝×（不合格）
【００２０】
表１
添加剤
（ｂ）ＰＡＯ（AMOCO CHEMlCAL製，商品名：PAO 601）
（ｃ）鉱油（エクソンモービル製，商品名：テルラ679）
（ｄ）ＭｏＤＴＣ（Vanderbilt製，商品名：MolyvanＡ）
（ｅ）Ｃａスルホネート（日本ルーブリゾール製，商品名 LUBRIZOL 5283）
【００２２】
成分（ａ）〜（ｅ）を所定量含む実施例１〜４のグリース組成物は、いずれも優れた耐磨耗性と優れた低温作動性を示す。
これに対して、成分（ｂ）の合成油を含まない比較例５のグリース組成物は耐磨耗性は優れているが、低温作動性が劣り、成分（ｅ）のＣａスルホネートを含まない比較例６及び成分（ｄ）のＭｏＤＴＣを含まない比較例７のグリース組成物は優れた低温作動性を示すが、耐磨耗性が劣る。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a grease composition for gear lubrication, and more particularly to a grease composition for gear lubrication suitable for racks and pinions and a gear lubricated with the grease composition.
[0002]
[Prior art]
Since electric power steering uses electric power as a power source, its output is smaller than that of hydraulic power steering, and is mainly used for small cars. However, as environmental concerns and energy savings progress, electric power steering, which is effective in improving fuel efficiency, has spread to medium-sized vehicles, and its demand is increasing year by year.
There are many lubrication points in the steering, but particularly gears such as a rack and pinion part and a pinion assist type electric power steering (EPS) are subject to great pressure and are easily worn. Abnormal wear along the tooth profile is called backlash and causes abnormal noise.
The lubrication mechanism of rack and pinion is rolling slip between steel. Such a rolling lubrication mechanism using steel and steel applies to gear lubrication in general and is used not only for automobile parts but also for machine parts and the like. In addition, automobiles, electrical appliances, precision equipment, etc. are required to have a longer service life, higher efficiency, or improved low-temperature operability. It is necessary.
[0003]
Most of the steering drive systems are hydraulic. Conventionally, as a grease for racks and pinions, a general extreme pressure grease based on mineral oil has been used. In recent years, the surface pressure applied to the rack and pinion tooth surfaces has increased due to the increase in pinion assist type electric power steering and the spread to medium-sized vehicles, and conventional extreme pressure greases are no longer satisfactory in terms of durability and wear resistance. It was.
Electric power steering has a lower output than hydraulic power steering, and there is always a need for higher transmission power efficiency. It was also a big problem.
In order to solve such problems, a grease composition for steering is disclosed, but the cost is high and it is not always satisfied (for example, see Patent Document 1).
[0004]
[Patent Literature]
[Patent Document 1]
JP2001-64665
[0005]
[Problems to be solved by the invention]
An object of the present invention is to provide a grease composition for gear lubrication, particularly a grease composition for gear lubrication suitable for racks and pinions.
Another object of the present invention is to provide a grease composition suitable for use in an inexpensive rack and pinion having wear resistance capable of withstanding the severe lubrication conditions required for steering and excellent in operability at low temperature operation. It is to be.
Still another object of the present invention is to provide a gear, particularly a rack and a pinion, lubricated with the above-mentioned gear lubricating grease composition.
[0006]
[Means for Solving the Problems]
The present invention provides the following grease composition for gear lubrication.
1. A grease composition for gear lubrication comprising the following components (a) to (e):
(A) Thickener (b) Synthetic oil (c) Mineral oil (d) Molybdenum dithiocarbamate (MoDTC)
(E) Ca sulfonate 2. (E) The grease composition for gear lubrication according to 1 above, wherein the component is an overbased Ca sulfonate.
3. (B) The grease composition for gear lubrication according to the above 1 or 2, wherein the component is a synthetic hydrocarbon oil.
4). 4. The grease composition for gear lubrication according to any one of 1 to 3 above, wherein the component (a) is Li hydroxy stearate.
5. (D) Grease composition for gear lubrication of any one of said 1-4 whose content of component is 0.1-10 mass% and whose content of (e) component is 0.1-10 mass%. .
6). 6. The grease composition for gear lubrication according to any one of 1 to 5 above, which is used for racks and pinions.
7). The gear lubricated with the grease composition for gear lubrication of any one of said 1-6.
8). The gear according to the above 7, which is a rack and a pinion.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
A grease composition containing a combination of MoDTC and Ca sulfonate is used for a constant velocity joint (CVJ), and its friction reducing effect and wear resistance are well known facts. However, there is no example in which a grease composition containing a combination of MoDTC and Ca sulfonate is used for racks and pinions, and therefore, there is no report that the friction reducing effect and wear resistance are exhibited.
[0008]
As the thickener of component (a) used in the grease composition of the present invention, all thickeners can be used. For example, soap thickeners represented by Li soap and composite Li soap, urea thickeners represented by diurea, inorganic thickeners represented by organic clay and silica, and organic materials represented by PTFE. Examples of the thickener include Li soap, and specifically Li hydroxy stearate.
The amount of thickener in the grease composition of the present invention is preferably 1 to 25% by mass, more preferably 3 to 20% by mass. If it is less than 1% by mass, the thickener effect is small, and it is too soft to cause leakage from the lubrication part. On the other hand, if it exceeds 25% by mass, the grease composition becomes too hard, and there is no flow into the lubrication part, making it difficult to obtain a sufficient effect.
[0009]
In the grease composition of the present invention, as the synthetic oil of component (b), a lubricating oil usually used as a base oil for grease such as ester oil, synthetic hydrocarbon oil, phenyl ether, polyglycol and the like can be used. Of these, synthetic hydrocarbon oils (polyalphaolefins) are particularly preferred.
The amount of the synthetic oil in the grease composition of the present invention is preferably 10 to 60% by mass, more preferably 30 to 40% by mass. If it is less than 10% by mass, the low temperature operability of the member to be lubricated tends to deteriorate, and if it exceeds 60% by mass, the cost increases, which is economically disadvantageous.
[0010]
In the grease composition of the present invention, all mineral oils can be used as the mineral oil of component (c). For example, refined mineral oil, high viscosity index oil, dewaxed mineral oil and the like can be mentioned. Particularly preferred is dewaxed mineral oil.
The amount of mineral oil in the grease composition of the present invention is preferably 30 to 80% by mass, more preferably 50 to 60% by mass. If the amount is less than 30% by mass, the cost increases, and if it exceeds 80% by mass, the low temperature operability of the lubricated member tends to deteriorate.
[0011]
In the grease composition of the present invention, preferred examples of the component (d) MoDTC (molybdenum dithiocarbamate) include those represented by the following formula (1).
(R 1 R 2 N-CS -S) 2 -Mo 2 OmSn (1)
(Wherein R 1 and R 2 each independently represents an alkyl group having 1 to 24 carbon atoms, preferably 3 to 18 carbon atoms, m is 0 to 3, n is 4 to 1, and m + n = 4)
The amount of MoDTC in the grease composition of the present invention is preferably 0.1 to 10% by mass, more preferably 0.5 to 5% by mass. If it is less than 0.1% by mass, the effect of reducing wear is insufficient, and if it exceeds 10% by mass, no further improvement in effect is observed.
[0012]
As the Ca sulfonate of the component (e) used in the grease composition of the present invention, all Ca sulfonates used as metal detergents and rust inhibitors used in lubricating oils such as engine oils can be used. For example, calcium salts of petroleum sulfonic acids obtained by sulfonation of aromatic hydrocarbon components in lubricating oil fractions, calcium salts of synthetic sulfonic acids such as dinonylnaphthalene sulfonic acid and alkylbenzene sulfonic acid, Examples include basic calcium salts and overbased calcium salts of alkyl aromatic sulfonic acids, and preferable examples include overbased Ca sulfonates.
The amount of Ca sulfonate in the grease composition of the present invention is preferably 0.1 to 10% by mass, more preferably 0.5 to 5% by mass. If it is less than 0.1% by mass, the effect of reducing wear is insufficient, and if it exceeds 10% by mass, no further improvement in effect is observed.
[0013]
In the grease composition of the present invention, the total amount of MoDTC of component (d) and Ca sulfonate of component (e) is preferably 0.2 to 10% by mass, more preferably 1 to 10% by mass. If it is less than 0.2% by mass, the effect of reducing wear is insufficient, and if it exceeds 10% by mass, no further improvement in the effect is recognized.
[0014]
Various additives can be added to the grease composition of the present invention as necessary. Examples of such additives include antioxidants, rust inhibitors, metal corrosion inhibitors, oiliness agents, antiwear agents, extreme pressure agents, solid lubricants, and the like.
The grease composition of the present invention can be easily produced by mixing the above components and other additives in a desired blending ratio.
[0015]
The grease composition of the present invention can be used for lubricating various parts, but is most suitable for gear lubrication, and particularly suitable for rack and pinion lubrication. The constituent materials of the rack and pinion are both steel, and the contact form of the rack and pinion is line contact.
[0016]
Examples Each of the greases of Examples and Comparative Examples was made with the formulation shown in Table 1 below, and the physical properties were evaluated. The results are shown in Table 1.
Examples 1-4 and Comparative Examples 5-7
(1) 450 g of hydroxystearic acid was completely dissolved at 80 ° C. with respect to 902.2 g of the base oil (component (b) and component (c) (40 to 60)). (2) 64.8 g of lithium hydroxide was completely dissolved in 324 g of pure water at 80 ° C. in another container, and (1) and (2) were mixed, reacted at 100 ° C. with thorough stirring for 30 minutes, and then at 230 ° C. The remaining base oil (component (b) and component (c) (40 to 60)) 1083 g was added as additional oil and cooled to 100 ° C. or lower with stirring to obtain a base grease (base (The total amount of grease is 2500 g and the amount of thickener is 18%).
Add additives to this base grease in the formulation shown in Table 1, add base oil (component (b) and component (c) (40 to 60)), and adjust to consistency No. 1 grade with a three-roll mill. (Thickener amount is 7.0%).
Comparative Example 8
Extreme pressure grease with molybdenum disulfide blended with a commercially available lithium soap, which has been used for racks and pinions.
[0017]
Evaluation test method of grease composition Abrasion resistance (Falex α model test)
A block (16 mm long, 6 mm wide, 10 mm thick) is brought into contact with the upper surface of the ring (outer diameter 35 mm, thickness 9 mm) horizontally, 0.2 g of sample grease is applied to the ring surface, and a specified load (294 N ) To measure the wear depth of the wear marks formed on the block surface when rotated for a specified time (60 minutes).
[0018]
Test condition test piece: Ring S-10 (HRC 58-63, RMS 0.15-0.30 μm)
Block H-30 (HRC 27-33, RMS 0.10-0.20μm)
Rotation speed: 37rpm (Ring diameter 35mm, peripheral speed 68mm / s)
Load: 294N
Test time: 60 minutes Criteria: Wear depth (μm)
Less than 10μ = ○ (pass), 10 μm or more = × (fail)
[0019]
Low temperature operation (low temperature torque test: JIS K2220 5 14)
Test temperature: -40 ° C
Judgment criteria: Starting torque (N · cm)
Less than 20 N · cm = ○ (pass), 20 N · cm or more = × (fail)
[0020]
Table 1
Additive (b) PAO (AMOCO CHEMlCAL, trade name: PAO 601)
(C) Mineral oil (product name: Tellura 679, manufactured by ExxonMobil)
(D) MoDTC (Vanderbilt, trade name: Molyvan A)
(E) Ca sulfonate (trade name LUBRIZOL 5283, manufactured by Nippon Lubrizol)
[0022]
Each of the grease compositions of Examples 1 to 4 containing a predetermined amount of components (a) to (e) exhibits excellent wear resistance and excellent low-temperature operability.
On the other hand, the grease composition of Comparative Example 5 that does not contain the component (b) synthetic oil has excellent wear resistance, but is poor in low-temperature operability, and does not contain the component (e) Ca sulfonate. The grease composition of Example 6 and Comparative Example 7 which does not contain MoDTC of component (d) exhibits excellent low temperature operation, but is inferior in wear resistance.
Claims (4)
（ａ）増ちょう剤
（ｂ）合成油
（ｃ）鉱油
（ｄ）組成物全体に対して０．１〜１０質量％のモリブデンジチオカーバメート（ＭｏＤＴＣ）
（ｅ）組成物全体に対して０．１〜１０質量％の過塩基性Ｃａスルホネート。A grease composition for rack and pinion gear lubrication comprising the following components (a) to (e):
(A) Thickener (b) Synthetic oil (c) Mineral oil (d) 0.1 to 10% by mass of molybdenum dithiocarbamate (MoDTC) based on the total composition
(E) 0.1-10 mass% overbased Ca sulfonate with respect to the whole composition .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003063172A JP4278411B2 (en) | 2003-03-10 | 2003-03-10 | Grease composition for gear lubrication |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003063172A JP4278411B2 (en) | 2003-03-10 | 2003-03-10 | Grease composition for gear lubrication |
Publications (2)
| Publication Number | Publication Date |
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| JP2004269722A JP2004269722A (en) | 2004-09-30 |
| JP4278411B2 true JP4278411B2 (en) | 2009-06-17 |
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| JP2003063172A Expired - Lifetime JP4278411B2 (en) | 2003-03-10 | 2003-03-10 | Grease composition for gear lubrication |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007070461A (en) * | 2005-09-07 | 2007-03-22 | Cosmo Sekiyu Lubricants Kk | Waterproof grease composition |
| JP6987510B2 (en) * | 2017-02-21 | 2022-01-05 | 協同油脂株式会社 | Lubricant composition for reducer and reducer |
| WO2023148802A1 (en) * | 2022-02-01 | 2023-08-10 | 株式会社ジェイテクト | Grease composition and steering gear device |
| WO2023190513A1 (en) * | 2022-03-28 | 2023-10-05 | 協同油脂株式会社 | Grease composition and rack-and-pinion-type steering device filled with said grease composition |
| WO2024048744A1 (en) * | 2022-08-31 | 2024-03-07 | 協同油脂株式会社 | Grease composition and rack-and-pinion-type steering device filled with said grease composition |
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