JPH07173483A - Sound-deadening grease composition - Google Patents
Sound-deadening grease compositionInfo
- Publication number
- JPH07173483A JPH07173483A JP27591793A JP27591793A JPH07173483A JP H07173483 A JPH07173483 A JP H07173483A JP 27591793 A JP27591793 A JP 27591793A JP 27591793 A JP27591793 A JP 27591793A JP H07173483 A JPH07173483 A JP H07173483A
- Authority
- JP
- Japan
- Prior art keywords
- grease
- molecular weight
- added
- weight polyolefin
- polyolefin powder
- 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
Landscapes
- Lubricants (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ギヤ−ドモ−タ−等減
速機付きモ−タ−の減速部、自動車ワイパ−モ−タ−、
サンル−フモ−タ−、パワ−シ−トモ−タ−、ウインド
レギュレ−タ−モ−タ−、オ−トアンテナモ−タ−、オ
−トミラ−モ−タ−等のギヤ−部分の音消しのために使
用される潤滑グリ−スに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speed reducer of a motor equipped with a gear reducer or the like, a motor wiper motor,
For sound deadening of gear parts such as sun wheel motor, power sheet motor, wind regulator motor, auto antenna motor, auto mirror motor, etc. The present invention relates to a lubricating grease used for this purpose.
【０００２】[0002]
【従来の技術】７．５ｋｗ以下のギヤ−ドモ−タ−の減
速機部分、自動車のワイパ−モ−タ−、サンル−フモ−
タ−、パワ−シ−トモ−タ−、ウインドレギュレ−タ−
モ−タ−、オ−トアンテナモ−タ−、オ−トミラ−モ−
タ−等のギヤ−部分には密封機構が簡素化できることな
どから従来よりグリ−スが使用されてきた。近年これら
の部品に高品質化が求められ、これらの機械部品の低騒
音化もその課題の一つとして取り上げられるようになっ
た。これらの機械部品の低騒音化のためグリ−スにもそ
の性能向上が求められ、従来技術の延長であるポリブテ
ン、ポリイソブチレン、オレフィンコポリマ−、イソプ
レンゴム、合成ロジン等のポリマ−の添加によってある
レベルまで低騒音化を実現することができた。これらの
物質はいずれもグリ−スに添加すると高粘着性を示し、
その付着性と油膜厚さを厚くすることにより低騒音化を
実現してきた。これはグリ−スメ−カ−においては周知
の事実である。しかしながら、粘着性を増加させること
や油膜厚さを厚くさせることにも限界があり、また高粘
着性グリ−スの場合には、低温始動時のトルクが重くな
ってしまうため使用温度範囲がかなり制限されたり、使
用中にポリマ−分子が切断されて粘着性を失うなどの問
題点があった。2. Description of the Related Art Reduction gears of geared motors of 7.5 kW or less, wiper motors of automobiles, sun roof motors
Water, power sheet motor, wind regulator
Motor, auto antenna motor, auto mirror motor
Grease has been conventionally used for gear parts such as turbines because the sealing mechanism can be simplified. In recent years, high quality of these parts has been required, and noise reduction of these mechanical parts has been taken up as one of the problems. In order to reduce the noise of these mechanical parts, the grease is also required to improve its performance. This is due to the addition of polymers such as polybutene, polyisobutylene, olefin copolymer, isoprene rubber, synthetic rosin, etc. We were able to achieve low noise to the level. All of these substances show high tackiness when added to grease,
Noise reduction has been realized by increasing the adhesiveness and the oil film thickness. This is a well known fact in grease makers. However, there is a limit in increasing the adhesiveness and increasing the oil film thickness, and in the case of a high-adhesive grease, the torque at low temperature starting becomes heavy, so the operating temperature range is considerably large. There are problems such as limitation and loss of adhesiveness due to cleavage of polymer molecules during use.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、上記問題点
を解決し、従来の粘着性音消しグリ−スに代わる全く発
想の異なる高性能音消しグリ−スを提供することを目的
とする。SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to provide a high-performance muffler grease having a completely different idea, which replaces the conventional adhesive muffler grease. .
【０００４】[0004]
【問題を解決するための手段】上記問題点を解決し、本
発明の目的を達成するため、本発明に係る次のように構
成したことを特徴とする。すなわち、潤滑グリ−スに粒
径１０〜５０μｍの超高分子量ポリオレフィン粉末を２
〜４０重量％添加することを特徴とする。In order to solve the above problems and achieve the object of the present invention, the present invention is characterized in that it is constructed as follows. That is, 2 parts of ultra-high molecular weight polyolefin powder having a particle size of 10 to 50 μm are added to the lubricating grease.
-40% by weight is added.
【０００５】本発明に使用できる潤滑グリ−スは一般的
なグリ−スであり、例えばカルシウムグリ−ス、リチウ
ムグリ−ス、アルミニウムコンプレックスグリ−ス、ウ
レアグリ−ス、フッ素グリ−スなどである。また、基油
や添加剤についても特に限定されない。Lubricating grease which can be used in the present invention is a general grease such as calcium grease, lithium grease, aluminum complex grease, urea grease, fluorine grease and the like. . Further, the base oil and additives are not particularly limited.
【０００６】本発明に用いる超高分子量ポリオレフィン
粉末は、エチレンを原料としてチ−グラ−法を用いて直
接重合により製造されたものであり、分子量約２００
万、密度０．９４ｇ／cm3 、粒径１０〜５０μｍ、融点
１３６℃、ショア−硬度６５のものである。The ultrahigh molecular weight polyolefin powder used in the present invention is produced by direct polymerization using ethylene as a raw material by the Ziegler method and has a molecular weight of about 200.
The density is 0.94 g / cm 3 , the particle size is 10 to 50 μm, the melting point is 136 ° C., and the Shore hardness is 65.
【０００７】潤滑グリ−スに上記超高分子量ポリオレフ
ィン粉末を混合する方法は特に限定されるものではな
く、ニ−ダ−や三段ロ−ルミルなど一般的な混合装置で
構わない。本発明において超高分子量ポリオレフィン粉
末の添加量は２〜４０％である。２％未満の添加では、
十分な音消し効果が得られず、４０％を越える量を添加
しても音消し効果はほとんど向上しない。好ましい添加
量は５〜３０％である。また超高分子量ポリオレフィン
粉末の粒径は１０〜５０μｍでなければならない。粒径
１０μｍ未満の超高分子量ポリオレフィン粉末は市販さ
れていないため使用できず、５０μｍを越えるような巨
大粒子では狭い隙間に入り込めず効果を発揮できない。
本発明の音消しグリ−ス組成物は粉体を添加しているた
め、従来の粘着性音消しグリ−スのように、温度が低下
してくると固化してくるので機械が重くなるという低温
性の悪化や耐久性が悪いという欠点がないのが特徴であ
る。The method of mixing the ultra-high molecular weight polyolefin powder with the lubricating grease is not particularly limited, and a general mixing device such as a kneader or a three-stage roll mill may be used. In the present invention, the addition amount of the ultra high molecular weight polyolefin powder is 2 to 40%. With less than 2% addition,
A sufficient muffling effect cannot be obtained, and the muffling effect is hardly improved even if an amount exceeding 40% is added. The preferable addition amount is 5 to 30%. The particle size of the ultra high molecular weight polyolefin powder must be 10 to 50 μm. Ultra-high molecular weight polyolefin powder having a particle size of less than 10 μm cannot be used because it is not commercially available, and giant particles having a particle size of more than 50 μm cannot enter the narrow gap and cannot exert the effect.
Since the sound deadening grease composition of the present invention contains powder, it becomes solid as the temperature lowers like a conventional adhesive sound deadening grease, so that the machine becomes heavy. It is characterized by the fact that it does not have the drawbacks of poor low-temperature properties and poor durability.
【０００８】超高分子量ポリオレフィン粉末が顕著な音
消し効果を示す理由を以下に述べる。一般に歯車が駆動
している時には歯車の歯面に強い圧力がかかる。この圧
力により油膜は数μｍ程度にまで薄くなることがしばし
ば起き、歯車の歯面の表面粗さより小さくなってしま
う。このため歯面同士が部分的に直接接触するようにな
り、高周波騒音が発生する。ところが、そこに超高分子
量ポリオレフィン粉末が存在すると、この粒子は油膜厚
さおよび歯面の表面粗さより大きいために歯面同士の直
接接触を防ぎ、且つ粒子自体が圧力によって弾性変形す
ることにより歯車の振動を吸収し高周波騒音の発生を抑
制するものと説明できる。The reason why the ultrahigh molecular weight polyolefin powder exhibits a remarkable sound deadening effect will be described below. Generally, when a gear is driven, a strong pressure is applied to the tooth surface of the gear. This pressure often causes the oil film to be thinned to about several μm, which is smaller than the surface roughness of the tooth surface of the gear. As a result, the tooth surfaces come into direct contact with each other, and high frequency noise is generated. However, when ultra-high molecular weight polyolefin powder is present there, the particles are larger than the oil film thickness and the surface roughness of the tooth surfaces, so direct contact between the tooth surfaces is prevented, and the particles themselves elastically deform due to pressure It can be explained that it absorbs the vibration of the above and suppresses the generation of high frequency noise.
【０００９】[0009]
【実施例】以下、実施例および比較例により本発明を具
体的に説明する。なお、本発明が本実施例のみに限定さ
れるものではない。本発明で消音効果を試験するために
用いたのは、出力１．５ｋｗ、極数４、減速比１／１０
０のギヤ−ドモ−タ−で、グリ−スの充填量は減速機部
分の空間容積の５０％である。また試験は無負荷で行っ
た。騒音の測定は市販の騒音計を用い、ギヤ−ドモ−タ
−上３０ｃｍの位置にマイクロホンを置いてギヤ−ドモ
−タ−を１分間運転し、１分後の騒音レベルを測定し
た。実施例および比較例に示したリチウムグリ−ス、ア
ルミニウムコンプレックスグリ−ス、カルシウムグリ−
ス、およびウレアグリ−スは、全て市販の鉱物油ベ−ス
のグリ−スでカルシウムグリ−ス以外は、全て酸化防止
剤が入っており、リチウムグリ−スおよびウレアグリ−
スには防錆剤と極圧剤が添加されている。表１に実施例
の配合割合および性状を示し、表２に比較例の配合割合
および性状を示す。EXAMPLES The present invention will be specifically described below with reference to Examples and Comparative Examples. The present invention is not limited to this embodiment. The output of 1.5 kw, the number of poles, and the reduction ratio of 1/10 were used to test the silencing effect in the present invention.
With a gear motor of 0, the filling amount of grease is 50% of the space volume of the reduction gear portion. Moreover, the test was performed without load. For the measurement of noise, a commercially available sound level meter was used, a microphone was placed at a position of 30 cm above the geared motor, the geared motor was operated for 1 minute, and the noise level after 1 minute was measured. Lithium grease, aluminum complex grease, and calcium grease shown in Examples and Comparative Examples
All of the greases and urea greases are commercially available mineral oil-based greases, except for calcium greases, which all contain an antioxidant, lithium grease and urea grease.
A rust preventive agent and an extreme pressure agent are added to the cloth. Table 1 shows the mixing ratio and properties of the examples, and Table 2 shows the mixing ratio and properties of the comparative examples.
【００１０】[0010]
【表１】 [Table 1]
【００１１】[0011]
【表２】 [Table 2]
【００１２】実施例１〜５は、リチウムグリ−スに超高
分子量ポリオレフィン粉末（粒径３０μｍ）をそれぞれ
２％、５％、３０％、４０％、および５０％添加したも
のである。超高分子量ポリオレフィン粉末（粒径３０μ
ｍ）無添加の比較例１および２と比較すると、２％（実
施例１）添加でも騒音レベルはかなり低くなるが、５％
以上（実施例２〜４）添加するとさらに騒音レベルは低
下する。また、５０％（実施例５）添加しても、４０％
添加したもの（実施例４）より騒音レベルは低下しなか
った。実施例６〜８はアルミニウムコンプレックスグリ
−ス、カルシウムグリ−スおよびウレアグリ−スにそれ
ぞれ超高分子量ポリオレフィン粉末（粒径３０μｍ）を
５％添加したものである。それぞれの騒音レベルは５０
ｄＢ、５１ｄＢおよび５０ｄＢであり、グリ−スの種類
に関係なく騒音レベルを低下させる効果があることが解
る。実施例９は、リチウムグリ−スに超高分子量ポリオ
レフィン粉末（粒径１０μｍ）を５％添加したものであ
り、実施例１０はリチウムグリ−スに超高分子量ポリオ
レフィン粉末（粒径５０μｍ）を５％添加したものであ
る。これは超高分子量ポリオレフィン粉末の粒度による
影響を確認するために実施したものであり、予想通りこ
れらの粒径の範囲内であれば騒音レベルを低下させる効
果があることが解る。In Examples 1 to 5, 2%, 5%, 30%, 40% and 50% of ultra high molecular weight polyolefin powder (particle size 30 μm) were added to lithium grease, respectively. Ultra high molecular weight polyolefin powder (particle size 30μ
m) Compared with the non-added Comparative Examples 1 and 2, the noise level is considerably lower even with the addition of 2% (Example 1), but it is 5%.
With the above addition (Examples 2 to 4), the noise level is further lowered. Moreover, even if 50% (Example 5) is added, 40%
The noise level was not lower than that of the additive (Example 4). In Examples 6 to 8, 5% of ultra-high molecular weight polyolefin powder (particle size 30 μm) was added to aluminum complex grease, calcium grease and urea grease, respectively. Each noise level is 50
It can be seen that they are dB, 51 dB and 50 dB, and have an effect of lowering the noise level regardless of the type of grease. In Example 9, 5% of ultrahigh molecular weight polyolefin powder (particle size 10 μm) was added to lithium grease, and in Example 10, 5% of ultrahigh molecular weight polyolefin powder (particle size 50 μm) was added to lithium grease. % Added. This was carried out in order to confirm the influence of the particle size of the ultra-high molecular weight polyolefin powder, and it can be understood that the noise level is reduced within the range of these particle sizes as expected.
【００１３】比較例１はリチウムグリ−スであり、これ
は５９ｄＢとかなり高い騒音レベルであった。比較例２
はウレアグリ−スであり、これも６１ｄＢとかなり高い
騒音レベルであった。比較例３はリチウムグリ−スに超
高分子量ポリオレフィン粉末（粒径３０μｍ）を１．５
％添加したものであるが、騒音レベルは５６ｄＢであり
２％添加した実施例１に比較して高いレベルであった。
比較例４はリチウムグリ−スに超高分子量ポリオレフィ
ン粉末（粒径６０μｍ）を５％添加したものであるが、
騒音レベルを低下させる効果はほとんどなかった。これ
は超高分子量ポリオレフィン粉末の粒径が５０μｍを越
えるような巨大粒子では狭い隙間に入り込めず効果を発
揮できないためと考えられる。Comparative Example 1 was lithium grease, which had a considerably high noise level of 59 dB. Comparative example 2
Is urea grease, which also has a considerably high noise level of 61 dB. In Comparative Example 3, lithium grease was mixed with 1.5 times of ultra high molecular weight polyolefin powder (particle size 30 μm).
%, The noise level was 56 dB, which was a high level as compared with Example 1 in which 2% was added.
Comparative Example 4 was prepared by adding 5% of ultra-high molecular weight polyolefin powder (particle size 60 μm) to lithium grease.
There was little effect on reducing the noise level. It is considered that this is because if ultra-high molecular weight polyolefin powder has a particle size of more than 50 μm, it cannot enter the narrow gap and exert the effect.
【００１４】[0014]
【発明の効果】本発明に係る音消しグリース組成物は上
記のように構成されているので、従来の音消しグリース
組成物のごとく粘着性ポリマ−を含有していないため、
温度が低下してくると固化してくるので機械が重くなる
という低温性の悪化や耐久性が悪いという欠点がなく、
しかもギヤ−ドモ−タ−や自動車部品モ−タ−の歯車部
分から発生する騒音を低減させるという効果を有する。Since the sound deadening grease composition according to the present invention is constituted as described above, it does not contain an adhesive polymer as in the conventional sound deadening grease composition.
It solidifies when the temperature decreases, so there is no drawback that the machine becomes heavy and the low temperature deteriorates and the durability is poor.
Moreover, it has an effect of reducing the noise generated from the gear portion of the geared motor or the automobile part motor.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ１０Ｎ 40:06 50:10 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI technical display location C10N 40:06 50:10
Claims (1)
高分子量ポリオレフィン粉末を２〜４０重量％添加する
ことを特徴とする音消しグリ−ス組成物。1. A sound deadening grease composition, wherein 2 to 40% by weight of ultra-high molecular weight polyolefin powder having a particle diameter of 10 to 50 μm is added to a lubricating grease.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27591793A JPH07173483A (en) | 1993-10-08 | 1993-10-08 | Sound-deadening grease composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27591793A JPH07173483A (en) | 1993-10-08 | 1993-10-08 | Sound-deadening grease composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07173483A true JPH07173483A (en) | 1995-07-11 |
Family
ID=17562229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27591793A Pending JPH07173483A (en) | 1993-10-08 | 1993-10-08 | Sound-deadening grease composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07173483A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004029184A1 (en) | 2002-09-25 | 2004-04-08 | Koyo Seiko Co., Ltd. | Lubricant composition and speed reducer using the same, and electrically operated power steering device using the same |
| EP1580256A1 (en) | 2004-03-18 | 2005-09-28 | Koyo Seiko Co., Ltd. | Lubricant composition, speed reduction gear using the same, and electric power steering apparatus using the same |
| WO2006001426A1 (en) * | 2004-06-29 | 2006-01-05 | Jtekt Corporation | Spline joint and lubricating agent composition |
| WO2010093039A1 (en) | 2009-02-13 | 2010-08-19 | 協同油脂株式会社 | Grease composition for sound attenuation |
| JP2016006155A (en) * | 2014-05-29 | 2016-01-14 | 株式会社リコー | Driving device, image forming device and grease composition |
| JP2016006154A (en) * | 2014-05-29 | 2016-01-14 | 株式会社リコー | Driving device, image forming device and grease composition |
| CN108822928A (en) * | 2018-03-30 | 2018-11-16 | 深圳市合诚润滑材料有限公司 | A kind of wiper motor lubricating grease and preparation method thereof |
| WO2018220945A1 (en) * | 2017-05-29 | 2018-12-06 | 東レ・ダウコーニング株式会社 | Grease composition and sliding member coated therewith |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54139610A (en) * | 1978-04-20 | 1979-10-30 | Toyota Motor Corp | Sound and shock-absorbing grease |
-
1993
- 1993-10-08 JP JP27591793A patent/JPH07173483A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54139610A (en) * | 1978-04-20 | 1979-10-30 | Toyota Motor Corp | Sound and shock-absorbing grease |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004029184A1 (en) | 2002-09-25 | 2004-04-08 | Koyo Seiko Co., Ltd. | Lubricant composition and speed reducer using the same, and electrically operated power steering device using the same |
| JP2004162018A (en) * | 2002-09-25 | 2004-06-10 | Koyo Seiko Co Ltd | Lubricant composition, decelerator by using the same and electric power steering device by using the same |
| US7452850B2 (en) | 2002-09-25 | 2008-11-18 | Jtekt Corporation | Lubricant composition and speed reducer using the same, and electrically operated power steering device using the same |
| JP4591743B2 (en) * | 2002-09-25 | 2010-12-01 | 株式会社ジェイテクト | Grease composition, speed reducer using the same, and electric power steering device using the same |
| EP1580256A1 (en) | 2004-03-18 | 2005-09-28 | Koyo Seiko Co., Ltd. | Lubricant composition, speed reduction gear using the same, and electric power steering apparatus using the same |
| WO2006001426A1 (en) * | 2004-06-29 | 2006-01-05 | Jtekt Corporation | Spline joint and lubricating agent composition |
| WO2010093039A1 (en) | 2009-02-13 | 2010-08-19 | 協同油脂株式会社 | Grease composition for sound attenuation |
| US9422500B2 (en) | 2009-02-13 | 2016-08-23 | Kyodo Yushi Co., Ltd. | Noise reducing grease composition |
| JP2016006154A (en) * | 2014-05-29 | 2016-01-14 | 株式会社リコー | Driving device, image forming device and grease composition |
| JP2016006155A (en) * | 2014-05-29 | 2016-01-14 | 株式会社リコー | Driving device, image forming device and grease composition |
| WO2018220945A1 (en) * | 2017-05-29 | 2018-12-06 | 東レ・ダウコーニング株式会社 | Grease composition and sliding member coated therewith |
| CN110662826A (en) * | 2017-05-29 | 2020-01-07 | 道康宁东丽株式会社 | Grease composition and sliding member coated with the same |
| JPWO2018220945A1 (en) * | 2017-05-29 | 2020-05-21 | デュポン・東レ・スペシャルティ・マテリアル株式会社 | Grease composition and sliding member coated with the same |
| EP3633015A4 (en) * | 2017-05-29 | 2020-12-09 | DuPont Toray Specialty Materials Kabushiki Kaisha | Grease composition and sliding member coated therewith |
| US11162045B2 (en) | 2017-05-29 | 2021-11-02 | Dow Corning Toray Co., Ltd. | Grease composition and sliding member coated therewith |
| CN108822928A (en) * | 2018-03-30 | 2018-11-16 | 深圳市合诚润滑材料有限公司 | A kind of wiper motor lubricating grease and preparation method thereof |
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