JPH04255794A - Lubricating oil composition for final reduction gear - Google Patents
Lubricating oil composition for final reduction gearInfo
- Publication number
- JPH04255794A JPH04255794A JP3942491A JP3942491A JPH04255794A JP H04255794 A JPH04255794 A JP H04255794A JP 3942491 A JP3942491 A JP 3942491A JP 3942491 A JP3942491 A JP 3942491A JP H04255794 A JPH04255794 A JP H04255794A
- Authority
- JP
- Japan
- Prior art keywords
- oil
- reduction gear
- final reduction
- esters
- extreme pressure
- 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
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 14
- 239000010687 lubricating oil Substances 0.000 title claims description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000002199 base oil Substances 0.000 claims abstract description 7
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 7
- 125000003342 alkenyl group Chemical group 0.000 claims abstract description 4
- QCJQWJKKTGJDCM-UHFFFAOYSA-N [P].[S] Chemical compound [P].[S] QCJQWJKKTGJDCM-UHFFFAOYSA-N 0.000 claims abstract 3
- 239000000126 substance Substances 0.000 claims description 9
- 239000003607 modifier Substances 0.000 claims description 5
- -1 alkylamine salt Chemical class 0.000 abstract description 25
- 239000003921 oil Substances 0.000 abstract description 13
- 150000002148 esters Chemical class 0.000 abstract description 12
- 235000014113 dietary fatty acids Nutrition 0.000 abstract description 10
- 239000000194 fatty acid Substances 0.000 abstract description 10
- 229930195729 fatty acid Natural products 0.000 abstract description 10
- 125000000217 alkyl group Chemical group 0.000 abstract description 9
- 150000001875 compounds Chemical class 0.000 abstract description 8
- 239000002480 mineral oil Substances 0.000 abstract description 3
- 235000010446 mineral oil Nutrition 0.000 abstract description 3
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 abstract 1
- 150000003014 phosphoric acid esters Chemical class 0.000 description 15
- 235000019198 oils Nutrition 0.000 description 11
- 239000003638 chemical reducing agent Substances 0.000 description 9
- 239000012208 gear oil Substances 0.000 description 9
- 125000003710 aryl alkyl group Chemical group 0.000 description 6
- 125000003118 aryl group Chemical group 0.000 description 6
- 125000004432 carbon atom Chemical group C* 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000003599 detergent Substances 0.000 description 5
- 230000006866 deterioration Effects 0.000 description 5
- 239000002270 dispersing agent Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 150000001298 alcohols Chemical class 0.000 description 4
- 150000001336 alkenes Chemical class 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 239000005078 molybdenum compound Substances 0.000 description 4
- 150000002752 molybdenum compounds Chemical class 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 239000003963 antioxidant agent Substances 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 150000008301 phosphite esters Chemical class 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 125000006539 C12 alkyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 239000002518 antifoaming agent Substances 0.000 description 2
- 125000000853 cresyl group Chemical group C1(=CC=C(C=C1)C)* 0.000 description 2
- 125000002704 decyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 125000001421 myristyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 2
- 125000000913 palmityl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 150000003018 phosphorus compounds Chemical class 0.000 description 2
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- LJKDOMVGKKPJBH-UHFFFAOYSA-N 2-ethylhexyl dihydrogen phosphate Chemical compound CCCCC(CC)COP(O)(O)=O LJKDOMVGKKPJBH-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 235000013162 Cocos nucifera Nutrition 0.000 description 1
- 244000060011 Cocos nucifera Species 0.000 description 1
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 description 1
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 1
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerol Natural products OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 229920001214 Polysorbate 60 Polymers 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000001476 alcoholic effect Effects 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 125000001204 arachidyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 150000005690 diesters Chemical class 0.000 description 1
- 239000012990 dithiocarbamate Substances 0.000 description 1
- 150000004659 dithiocarbamates Chemical class 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000000543 intermediate Substances 0.000 description 1
- 125000002960 margaryl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000006078 metal deactivator Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 125000001196 nonadecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000001117 oleyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])/C([H])=C([H])\C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000002958 pentadecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000002530 phenolic antioxidant Substances 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 description 1
- 229920013639 polyalphaolefin Polymers 0.000 description 1
- 229920000151 polyglycol Polymers 0.000 description 1
- 239000010695 polyglycol Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 125000002072 seryl group Chemical group 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000600 sorbitol Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 150000003464 sulfur compounds Chemical class 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 150000003580 thiophosphoric acid esters Chemical class 0.000 description 1
- 125000002889 tridecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000002948 undecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000004417 unsaturated alkyl group Chemical group 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Landscapes
- Lubricants (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は前輪及び後輪駆動車のハ
イポイドギヤ機構を有する終減速機および多板クラッチ
式摩擦機構により発生する差動抵抗力を利用する摩擦式
差動制限装置付き終減速機に使用される潤滑油に関する
。[Industrial Application Field] The present invention relates to a final reduction gear with a hypoid gear mechanism for front-wheel and rear-wheel drive vehicles, and a final reduction gear with a friction type differential limiting device that utilizes differential resistance generated by a multi-plate clutch type friction mechanism. Regarding lubricating oil used in machines.
【０００２】0002
【従来技術】現行の終減速機には高荷重／高すべり条件
下で優れた極圧性、耐摩耗性を得るため、一般的に以下
に例示する硫化オレフィン、リン酸エステル、亜リン酸
エステル、チオリン酸エステル、これらリン酸エステル
化合物のアミン塩、及び摩擦調整剤として硫化エステル
、有機モリブデン化合物、脂肪酸エステル等が複合的に
含有される潤滑油が使用されている。又、伝達効率向上
のためあるいは摩擦式差動制限装置付き終減速機のチャ
ターノイズあるいはジャダー対策のためにこれらの添加
剤配合に加えて比較的アルキル基の長いリン酸エステル
及びそれらのアミン塩等が加えられることが多い。[Prior Art] In order to obtain excellent extreme pressure properties and wear resistance under high load/high slip conditions, current final reducers generally contain the following sulfurized olefins, phosphate esters, phosphite esters, etc. Lubricating oils containing a complex of thiophosphoric acid esters, amine salts of these phosphoric acid ester compounds, and friction modifiers such as sulfurized esters, organic molybdenum compounds, and fatty acid esters are used. In addition to these additives, phosphate esters with relatively long alkyl groups and their amine salts are used to improve transmission efficiency or to prevent chatter noise or judder in final reducers with friction type differential limiting devices. is often added.
【０００３】しかしこのようなリン酸エステル及びそれ
らのアミン塩を加えると、大幅に極圧性能が低下し（耐
スコーリング性能や耐リッシング性能）、さらにリン酸
エステル類を過剰に使用すると、終減速機内部の軸受寿
命を短くする、長期にわたる耐チャター、耐ジャダー防
止性が確保できない等の欠点を有しており、特にリン酸
エステル類の過剰添加はシール軸摩耗（シールのリップ
部が入出力軸を摩耗させる）を助長し、油もれによる損
傷を引きおこすことがあった。However, when such phosphoric esters and their amine salts are added, the extreme pressure performance (scoring resistance performance and lishing resistance performance) is significantly reduced, and furthermore, when phosphoric esters are used in excess, the final It has drawbacks such as shortening the life of the bearings inside the reducer and not ensuring long-term anti-chatter and anti-judder properties.In particular, excessive addition of phosphate esters can cause seal shaft wear (the lip of the seal is damaged). This may cause damage to the output shaft (which may cause wear and tear on the output shaft) and cause damage due to oil leakage.
【０００４】0004
【発明が解決しようとする課題】本発明は、前述した終
減速機油のシール軸摩耗の特性を大幅に改善することを
目的とするものである。SUMMARY OF THE INVENTION An object of the present invention is to significantly improve the seal shaft wear characteristics of the final reduction gear oil described above.
【０００５】[0005]
【課題を解決するための手段】本発明は、基油、硫黄−
りん系極圧剤および一般式（１）[Means for Solving the Problems] The present invention provides base oil, sulfur-
Phosphorous extreme pressure agent and general formula (1)
【０００６】[0006]
【化２】Ｒ−（ＯＨ）ｘ …（１）[Chemical formula 2] R-(OH)x...(1)
【０００
７】（式中、ｘは１〜２の整数、ＲはＣ１０〜Ｃ２２の
アルキル基またはアルケニル基）で示される高級アルコ
ールよりなることを特徴とする終減速機用潤滑油組成物
に関する。000
7] A lubricating oil composition for a final reduction gear, characterized by comprising a higher alcohol represented by the formula (where x is an integer of 1 to 2, and R is a C10 to C22 alkyl group or alkenyl group).
【０００８】本発明で使用する前記アルコールの炭素数
としては、デシル、ウンデシル、ドデシル、トリデシル
、ミリスチル、ペンタデシル、セチル、ヘプタデシル、
ステアリル、ノナデシル、エイコシル、セリル、メリシ
ル、等が相当し、水酸基の位置は第１、第２、第３炭素
原子のいずれにも結合していても良く、又これらの不飽
和アルコールおよび上記の炭素数の組合せからなる２価
の飽和および不飽和の２価アルコール類を挙げることが
でき、とくに炭素数が１４から２２の飽和および不飽和
の１価あるいは２価アルコールが好ましい。また、その
使用量は全組成物に対し、０．０５〜５ｗｔ％、好まし
くは０．３〜１．０ｗｔ％である。The carbon number of the alcohol used in the present invention is decyl, undecyl, dodecyl, tridecyl, myristyl, pentadecyl, cetyl, heptadecyl,
These include stearyl, nonadecyl, eicosyl, seryl, melicyl, etc., and the hydroxyl group may be bonded to any of the 1st, 2nd, and 3rd carbon atoms, and these unsaturated alcohols and the above carbon atoms Divalent saturated and unsaturated dihydric alcohols consisting of a combination of numbers can be mentioned, and saturated and unsaturated monohydric or dihydric alcohols having 14 to 22 carbon atoms are particularly preferred. The amount used is 0.05 to 5 wt%, preferably 0.3 to 1.0 wt%, based on the total composition.
【０００９】また、本発明は必要に応じて金属不活性剤
、金属清浄剤、無灰系分散剤、酸化防止剤や消泡剤を配
合することができる。Further, in the present invention, a metal deactivator, a metal detergent, an ashless dispersant, an antioxidant, and an antifoaming agent can be added as necessary.
【００１０】一般にギヤ油には極圧剤として硫黄化合物
とリン化合物が極圧レベルに応じて配合されている。さ
らには多板クラッチ式摩擦機構により発生する差動抵抗
力を利用する摩擦式差動制限装置付き終減速機に使用す
る場合、スティックスリップ現象に起因するチャター、
ジャダーノイズを防止するためには（以下、これらをＬ
ＳＤ性能と略記する）炭素数４以上のアルキル基、アリ
ール基またはアラルキル基を有する亜リン酸エステル；
炭素数４以上のアルキル基、アリール基またはアラルキ
ル基を有するリン酸エステルのアルキルアミン塩；硫化
エステル類；有機モリブデン化合物；脂肪酸エステル類
等の摩擦調整剤が通常使用される。特にリン酸エステル
類が使用されると、前記のようなオイルシールと軸の摺
動部分においてシールおよび軸が摩耗し油漏れを生ずる
ことがあった。Generally, gear oil contains sulfur compounds and phosphorus compounds as extreme pressure agents depending on the extreme pressure level. Furthermore, when used in a final reduction gear with a friction type differential limiting device that utilizes the differential resistance generated by a multi-plate clutch type friction mechanism, chatter due to the stick-slip phenomenon,
In order to prevent judder noise (hereinafter, these
(abbreviated as SD performance) phosphite having an alkyl group, aryl group or aralkyl group having 4 or more carbon atoms;
Friction modifiers such as alkylamine salts of phosphoric acid esters having an alkyl group, aryl group, or aralkyl group having 4 or more carbon atoms; sulfurized esters; organic molybdenum compounds; fatty acid esters are usually used. In particular, when phosphoric acid esters are used, the seal and the shaft may wear out at the sliding portion between the oil seal and the shaft, resulting in oil leakage.
【００１１】したがってこのような問題を避けるためリ
ン酸エステル類を削減すると、ＬＳＤ性能が低下するた
め、本発明ではアルキル基の長いアルコール化合物を使
用することによってシール軸摩耗防止性が達成できるも
のである。軸摩耗は１つの原因として、前述したリン酸
エステル類の一部が加水分解され、生成した酸性リン酸
エステル類およびそれらの中間体がシール表面を抽出し
、表面上にガラス繊維などの構造補強材が露出して、軸
としゅう動することによって軸の摩耗が加速されると考
えられる。このような原因に対して、本発明ではリン酸
エステル類を使用してもアルコール系化合物を添加する
ことによって、リン酸エステル類の加水分解で発生した
酸性リン酸エステル類を中和、エステル化することで軸
摩耗を防止できるものと考えられる。更に無灰系分散剤
、金属系清浄分散剤、フェノール系酸化防止剤は、ギヤ
油の酸化劣化を抑えることで、長期にわたる安定なＬＳ
Ｄ性能を実現する。このようなリン酸エステル化合物の
加水分解制御は同時に軸受寿命の改善にも効果がある。
すなわち軸受はギヤ油の酸化劣化、特にリン酸エステル
類の劣化変質によって軸受寿命が短命化しやすいが、本
発明ではリン酸エステル類を削減することなく、従来の
終減速機およびＬＳＤ性能を保有する終減速機用ギヤ油
組成物よりも軸受寿命を延長することが可能となった。[0011] Therefore, if the amount of phosphate esters is reduced in order to avoid such problems, the LSD performance will deteriorate. Therefore, in the present invention, seal shaft wear resistance can be achieved by using an alcohol compound with a long alkyl group. be. One cause of shaft wear is that some of the phosphoric acid esters mentioned above are hydrolyzed, and the generated acidic phosphoric acid esters and their intermediates extract the seal surface and create structural reinforcement such as glass fiber on the surface. It is thought that the exposed material slides against the shaft, accelerating wear on the shaft. To address these causes, in the present invention, even if phosphoric acid esters are used, by adding an alcoholic compound, the acidic phosphoric acid esters generated by hydrolysis of the phosphoric acid esters can be neutralized and esterified. It is thought that shaft wear can be prevented by doing so. Furthermore, ashless dispersants, metal detergents and dispersants, and phenolic antioxidants suppress oxidative deterioration of gear oil, resulting in long-term stable LS.
Achieve D performance. Such hydrolysis control of phosphate ester compounds is also effective in improving bearing life. In other words, the life of bearings tends to be shortened due to the oxidative deterioration of gear oil, especially the deterioration and deterioration of phosphate esters, but the present invention retains the conventional final reducer and LSD performance without reducing the amount of phosphate esters. It has become possible to extend the bearing life compared to the gear oil composition for final reduction gears.
【００１２】本発明で使用する極圧剤としては、硫黄含
有化合物とりん含有化合物の併用または、硫黄とりんを
共に含有する化合物を使用するが、代表的なものとして
は、硫化オレフィン、リン酸エステル、亜リン酸エステ
ル、リン酸エステルのアルキルアミン塩などが挙げられ
る。[0012] As the extreme pressure agent used in the present invention, a combination of a sulfur-containing compound and a phosphorus-containing compound, or a compound containing both sulfur and phosphorus is used, but typical examples include sulfurized olefins and phosphoric acid. Examples include esters, phosphorous esters, and alkylamine salts of phosphoric esters.
【００１３】本発明で使用する好ましい硫化オレフィン
としては一般式（２）で示される。The preferred sulfurized olefin used in the present invention is represented by the general formula (2).
【００１４】[0014]
【化３】Ｒ１−Ｓｅ−Ｒ２
…（２）[Chemical formula 3] R1-Se-R2
...(2)
【００１５】（式中、Ｒ１はＣ４〜Ｃ１２
のアルケニル基Ｒ２はＣ４〜Ｃ１２のアルキル基または
アニケニル基ｅ は１〜８）その添加量は潤滑油の極圧
レベルによって加減するが、一般にハイボイドギヤ油の
場合全組成物に対し３〜１０ｗｔ％で使用する。(In the formula, R1 is C4 to C12
The alkenyl group R2 is a C4 to C12 alkyl group or the anikenyl group e is 1 to 8) The amount added is adjusted depending on the extreme pressure level of the lubricating oil, but generally in the case of high void gear oil, it is 3 to 10 wt% based on the total composition. use.
【００１６】本発明で使用する好ましいリン酸エステル
および亜リン酸エステルとしては、Preferred phosphoric acid esters and phosphite esters used in the present invention include:
【００１７】[0017]
【化４】Ｏ＝Ｐ（ＯＲ３）（ＯＲ４）（ＯＲ５），
Ｏ＝Ｐ（ＯＨ）（ＯＲ３）（ＯＲ４），Ｏ＝Ｐ（ＯＨ）
２（ＯＲ４）， Ｏ＝Ｐ（ＯＨ２）（ＯＲ４），Ｐ（
ＯＲ３）（ＯＲ４）（ＯＲ５）， Ｐ（ＯＨ）（ＯＲ
３）（ＯＲ４），Ｐ（ＯＨ２）（ＯＲ３）[Chemical formula 4] O=P (OR3) (OR4) (OR5),
O=P(OH)(OR3)(OR4),O=P(OH)
2(OR4), O=P(OH2)(OR4), P(
OR3) (OR4) (OR5), P(OH)(OR
3) (OR4), P(OH2) (OR3)
【００１８】
（式中、Ｒ３，Ｒ４，Ｒ５はＣ４以上の飽和または不飽
和のアルキル基、アリール基、またはアルキル基置換ア
リール基をあらわし同一でも異なっていても良い）等が
挙げられる。これらのリン化合物は前述の硫化オレフィ
ンと通常組み合わせて使用し、その使用量は全組成物に
対し０．１〜５ｗｔ％である。[0018]
(In the formula, R3, R4, and R5 represent a C4 or more saturated or unsaturated alkyl group, an aryl group, or an alkyl group-substituted aryl group, and may be the same or different). These phosphorus compounds are usually used in combination with the above-mentioned sulfurized olefin, and the amount used is 0.1 to 5 wt% based on the total composition.
【００１９】本発明で使用する好ましいリン酸エステル
のアミン塩は下記一般式（３）で示されるもので具体的
にはＲがブチル、ヘキシル、オクチル、ノエル、デシル
、ラウリル、ミリスチル、パルミチル、ステアリル、オ
レイル、フェニル、クレジル等でありかつＲ’が前記し
たもののうちフェニル、クレジルを除いたものである。
本発明ではこれらのリン酸エステルを全組成物に対し、
０．１〜５ｗｔ％使用する。Preferred phosphoric acid ester amine salts used in the present invention are those represented by the following general formula (3), specifically, R is butyl, hexyl, octyl, noel, decyl, lauryl, myristyl, palmityl, stearyl. , oleyl, phenyl, cresyl, etc., and R' is the above-mentioned ones excluding phenyl and cresyl. In the present invention, these phosphoric esters are added to the entire composition,
Use 0.1 to 5 wt%.
【００２０】[0020]
【化５】[C5]
【００２１】（式中、ｍ，ｎは１〜２の整数Ｒ７，Ｒ８
はＣ４〜Ｃ３０のアルキル基、アリール基、またはアラ
ルキル基）なお、化４や化５で示されるリン酸エステル
や亜リン酸エステルは、極圧剤と摩擦調整剤の両方の機
能を兼ねているが、炭素数の小さいものは摩擦調整機能
をもっていない。本発明で使用する摩擦調整剤としては
、硫化エステル、脂肪酸エステル化合物、有機モリブデ
ン化合物などを挙げることができる。(In the formula, m and n are integers R7 and R8 of 1 to 2.
(C4 to C30 alkyl group, aryl group, or aralkyl group) Note that the phosphoric acid esters and phosphite esters represented by chemical formulas 4 and 5 function as both extreme pressure agents and friction modifiers. However, those with a small number of carbon atoms do not have a friction adjustment function. Examples of the friction modifier used in the present invention include sulfurized esters, fatty acid ester compounds, and organic molybdenum compounds.
【００２２】本発明で使用する好ましい硫化エステルと
しては硫黄含量が１０〜２０重量％の硫化植物油脂肪酸
エステルあるいは硫化抹香油脂肪酸エステルで一般式（
４）で示されるものであり、その使用量は全組成物に対
し、０．１〜７ｗｔ％である。Preferred sulfurized esters used in the present invention include sulfurized vegetable oil fatty acid esters or sulfurized matcha oil fatty acid esters having a sulfur content of 10 to 20% by weight and having the general formula (
4), and the amount used is 0.1 to 7 wt% based on the total composition.
【００２３】[0023]
【化６】[C6]
【００２４】（式中、ａ，ｂ，ｃ，ｄは１〜１０、ｈは
１〜４、Ｒ９，Ｒ１０はＣ１〜Ｃ２０のアルキル基、ア
リール基、またはアラルキル基）(In the formula, a, b, c, and d are 1 to 10, h is 1 to 4, and R9 and R10 are C1 to C20 alkyl groups, aryl groups, or aralkyl groups)
【００２５】本発明で使用する好ましい脂肪酸エステル
化合物として一般式（５）で示される化合物でこれらは
終減速機の摩擦低減や多板クラッチ式摩擦機構部分の摩
擦改良剤として使用される物である。この他にポリオキ
シエチレンソルビタン脂肪酸エステル、ポリオキシエチ
レンソルビトール脂肪酸エステルやグリセリン脂肪酸エ
ステルでも良い。その使用量は全組成物に対し、０．０
３〜３ｗｔ％が好ましい。Preferred fatty acid ester compounds used in the present invention are compounds represented by the general formula (5), which are used to reduce the friction of final reducers and as friction improvers for multi-disc clutch type friction mechanisms. . In addition, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbitol fatty acid ester, and glycerin fatty acid ester may also be used. The amount used is 0.0 for the entire composition.
3 to 3 wt% is preferable.
【００２６】[0026]
【化７】[Chemical 7]
【００２７】（式中、ｆ，ｇは８〜２２、Ｒ’はアルキ
ル基またはアラルキル基）(In the formula, f and g are 8 to 22, R' is an alkyl group or an aralkyl group)
【００２８】本発明で使用される好ましい有機モリブデ
ン化合物は下記一般式（６）で示されるアミン錯塩であ
るが、この他に一般式（７）で示されるジチオリン酸塩
や一般式（８）で示されるジチオカルバミン酸塩でも良
い。これらの化合物は特に高温、高負荷での終減速機の
スコーリングやリッジングの発生を抑制する効果があり
、特にＬＳＤ油のような吸着力の強い化合物が使用され
る場合、極圧性能や耐摩耗性が低下するのを防止する効
果がある。使用量としては金属量として０．０１〜０．
６ｗｔ％が好ましい。Preferred organic molybdenum compounds used in the present invention are amine complexes represented by the following general formula (6), but also dithiophosphates represented by the general formula (7) and general formula (8). The dithiocarbamates shown may also be used. These compounds have the effect of suppressing the scoring and ridging of the final reducer especially at high temperatures and high loads, and especially when a compound with strong adsorption power such as LSD oil is used, the extreme pressure performance and resistance may be reduced. This has the effect of preventing a decrease in abrasion properties. The amount of metal used is 0.01 to 0.
6 wt% is preferred.
【００２９】[0029]
【化８】[Chemical formula 8]
【００３０】（式中、Ｒ１１はＣ３〜Ｃ１８のアルキル
基、Ｖは１〜２、Ｗは２〜３
）(In the formula, R11 is a C3-C18 alkyl group, V is 1-2, W is 2-3
)
【００３１】[0031]
【化９】[Chemical formula 9]
【００３２】（式中、Ｒ１２，Ｒ１３，Ｒ１４，Ｒ１５
はＣ３〜Ｃ１２のアルキル基、アリール基、またはアラ
ルキル基）(In the formula, R12, R13, R14, R15
is a C3 to C12 alkyl group, aryl group, or aralkyl group)
【００３３】[0033]
【化１０】[Chemical formula 10]
【００３４】（式中、Ｒ１２，Ｒ１３，Ｒ１４，Ｒ１５
は前記と同じ）本発明で使用される基油は溶剤精製ある
いは水素化処理を受けた鉱油ないしは合成油であって適
当な粘度を有するものでよい。たとえば合成油としては
ポリアルファオレフィン類、ジエステル類、ポリエチレ
ンプロピレン類、ポリグリコール類、ヒンダードエステ
ル類があげられる。これらの基油を単独あるいは複数組
み合わせて所定の粘度にして使用する。また必要に応じ
て粘度指数向上剤や流動点降下剤を配合する。このほか
に無灰系分散剤、金属系清浄分散剤、ヒンダードフェノ
ール系の酸化防止剤、アミン系の酸化防化剤、消泡剤を
使用することができる。特に金属系清浄剤はギヤ油の酸
化劣化の抑制とそれに伴うＬＳＤ性能の耐久寿命を延長
する効果がある。更にこれら金属系清浄剤は多板クラッ
チ間の動摩擦係数を高める作用も有する。(In the formula, R12, R13, R14, R15
(same as above) The base oil used in the present invention may be a mineral oil or synthetic oil that has been subjected to solvent refining or hydrogenation treatment and has an appropriate viscosity. Examples of synthetic oils include polyalphaolefins, diesters, polyethylene propylene, polyglycols, and hindered esters. These base oils are used singly or in combination to a predetermined viscosity. In addition, a viscosity index improver and pour point depressant are added as necessary. In addition, ashless dispersants, metal detergents and dispersants, hindered phenol antioxidants, amine antioxidants, and antifoaming agents can be used. In particular, metal-based detergents are effective in suppressing oxidative deterioration of gear oil and thereby extending the durability life of LSD performance. Furthermore, these metallic detergents also have the effect of increasing the coefficient of dynamic friction between the multi-plate clutches.
【００３５】[0035]
【実施例】次に本発明の実施例を具体的に説明するが、
実施例は本発明の効果を示す一部であり、実施例だけに
限定されるものではない。基油として中東原油から蒸留
精製した鉱油（１００℃の動粘度約１７センチストーク
ス）を使用し、表１に示した終減速始機用ギヤ油組成物
Ａ，Ｂ，Ｃ，Ｄを調製し、現在市販されているＥ，Ｆ油
と以下に説明する評価手段において性能比較し、高級ア
ルコール化合物の添加効果を確認した。
１）極圧性能の評価方法
国産乗用車の終減速機を用いたＣＲＣ−Ｌ４２およびＬ
−３７に準拠した試験方法である。ＣＲＣ−Ｌ４２準拠
の試験では代表的な損傷例はギヤ歯面のスコーリングで
あり、ＣＲＣ−Ｌ３７では歯面のリッジング損傷がある
。
２）ＬＳＤ性能評価方法
国産の摩擦式制御差動装置を装着した乗用車を車速１０
ｋｍ／時間以下でステアリングを片面に一杯にきり回転
させるときに終減速機の内部からチャター音あるいは車
体振動を伴なった異音が発生するかどうかを評価する。
またＬＳＤ性能の耐久性能を評価するために、実験室的
にギヤ油を酸化劣化させて、上記と同一の条件で異音が
発生するかどうか評価する。
３）シール軸摩擦防止性および軸受寿命台上に設置した
終減速機を入力回転数５８００ｒｐｍ、入力軸トルク１
４ｋｇ・ｍ、油温１３５℃、４５０時間運転後、入力軸
の摩耗深さを評価する。なお試験に供試した終減速機の
入力軸の材質は機械構造用炭素鋼で鍛造の焼入、焼戻し
処理が施されており、フロントオイルシールはアクリル
製である。軸受寿命については国産乗用車の終減速機を
用いて入力トルクと入力回転数をある一定モードで変動
させ、終減速機内部の軸受に負荷を与え、軸受に損傷が
発生するまでの時間を比較した。[Example] Next, an example of the present invention will be explained in detail.
The examples are only a part of showing the effects of the present invention, and the invention is not limited to the examples. Gear oil compositions A, B, C, and D for final reduction starters shown in Table 1 were prepared using mineral oil distilled and refined from Middle East crude oil (kinematic viscosity of about 17 centistokes at 100°C) as the base oil, Performance was compared with currently commercially available E and F oils using the evaluation method described below to confirm the effect of adding higher alcohol compounds. 1) Evaluation method of extreme pressure performance CRC-L42 and L using the final reduction gear of a domestic passenger car
This is a test method based on 37-37. In tests based on CRC-L42, a typical example of damage is scoring on gear tooth surfaces, and in CRC-L37, there is ridged damage on tooth surfaces. 2) LSD performance evaluation method A passenger car equipped with a domestically produced friction-type differential control device was driven at a vehicle speed of 10
Evaluate whether chatter noise or abnormal noise accompanied by vehicle body vibration is generated from inside the final reduction gear when the steering wheel is fully rotated to one side at a speed of less than km/hour. In addition, in order to evaluate the durability of LSD performance, gear oil was oxidized and deteriorated in the laboratory, and it was evaluated whether abnormal noise was generated under the same conditions as above. 3) Seal shaft friction prevention property and bearing life The final reducer installed on the table has an input rotation speed of 5800 rpm and an input shaft torque of 1.
After 450 hours of operation at 4 kg·m and oil temperature of 135°C, evaluate the depth of wear on the input shaft. The material of the input shaft of the final reducer used in the test is carbon steel for mechanical structure, which has been forged, hardened and tempered, and the front oil seal is made of acrylic. Regarding bearing life, we used a final reduction gear of a domestically produced passenger car and varied the input torque and input rotation speed in a certain constant mode, applied a load to the bearing inside the final reduction gear, and compared the time until bearing damage occurred. .
【００３６】[0036]
【表１】[Table 1]
【００３７】１）は、前記一般式（２）で示されるもの
である。
２）は、前記一般式（４）で示されるものである。
３）は、２−オレイル−１０−オールである。
４）は、モリブデンアミン錯塩である。
高級アルコールを添加したＡ、Ｃ、Ｄは２−エチルヘキ
シルアシッドホスフェーとのココナツアミン塩を使用し
ていても軸摩耗が７μｍ、６μｍ、７μｍと低いのに対
し、高級アルコールを使用していないＢは軸摩耗が１４
μｍと大きい。[0037] 1) is represented by the above general formula (2). 2) is represented by the above general formula (4). 3) is 2-oleyl-10-ol. 4) is a molybdenum amine complex salt. In A, C, and D, which added higher alcohol, the shaft wear was low at 7 μm, 6 μm, and 7 μm even when using coconut amine salt with 2-ethylhexyl acid phosphate, whereas B, which did not use higher alcohol. shaft wear is 14
It is as large as μm.
【００３８】[0038]
【効果】本発明は、高級アルコールの添加により終減速
機油のシール軸摩耗特性を大幅に改善した。[Effect] The present invention greatly improves the seal shaft wear characteristics of final reducer oil by adding higher alcohol.
Claims (2)
式（１） 【化１】Ｒ−（ＯＨ）ｘ …（１）（式中、
ｘは１〜２の整数、ＲはＣ１０〜Ｃ２２のアルキル基ま
たはアルケニル基）で示される高級アルコールよりなる
ことを特徴とする終減速機用潤滑油組成物。[Claim 1] Base oil, sulfur-phosphorus extreme pressure agent and general formula (1) [Chemical 1] R-(OH)x...(1) (in the formula,
A lubricating oil composition for a final reduction gear, characterized in that x is an integer of 1 to 2, and R is a higher alcohol represented by a C10 to C22 alkyl group or alkenyl group.
終減速機用潤滑油組成物。2. The lubricating oil composition for a final reduction gear according to claim 1, which contains a friction modifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3942491A JPH04255794A (en) | 1991-02-08 | 1991-02-08 | Lubricating oil composition for final reduction gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3942491A JPH04255794A (en) | 1991-02-08 | 1991-02-08 | Lubricating oil composition for final reduction gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04255794A true JPH04255794A (en) | 1992-09-10 |
Family
ID=12552609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3942491A Pending JPH04255794A (en) | 1991-02-08 | 1991-02-08 | Lubricating oil composition for final reduction gear |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04255794A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008069359A (en) * | 2007-10-09 | 2008-03-27 | Showa Shell Sekiyu Kk | Lubricant composition |
| JP2018016729A (en) * | 2016-07-28 | 2018-02-01 | 東燃ゼネラル石油株式会社 | Lubricant composition |
| EP3409751B1 (en) | 2016-01-27 | 2021-12-15 | ExxonMobil Research and Engineering Company | Lubricant composition |
-
1991
- 1991-02-08 JP JP3942491A patent/JPH04255794A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008069359A (en) * | 2007-10-09 | 2008-03-27 | Showa Shell Sekiyu Kk | Lubricant composition |
| EP3409751B1 (en) | 2016-01-27 | 2021-12-15 | ExxonMobil Research and Engineering Company | Lubricant composition |
| JP2018016729A (en) * | 2016-07-28 | 2018-02-01 | 東燃ゼネラル石油株式会社 | Lubricant composition |
| WO2018021570A1 (en) * | 2016-07-28 | 2018-02-01 | エクソンモービル リサーチ アンド エンジニアリング カンパニー | Lubricating oil composition |
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