JPH0510354A - Wet friction material - Google Patents
Wet friction materialInfo
- Publication number
- JPH0510354A JPH0510354A JP19057091A JP19057091A JPH0510354A JP H0510354 A JPH0510354 A JP H0510354A JP 19057091 A JP19057091 A JP 19057091A JP 19057091 A JP19057091 A JP 19057091A JP H0510354 A JPH0510354 A JP H0510354A
- Authority
- JP
- Japan
- Prior art keywords
- friction material
- fan
- recessed grooves
- shaped
- wet friction
- 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
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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D2069/004—Profiled friction surfaces, e.g. grooves, dimples
Landscapes
- Mechanical Operated Clutches (AREA)
- Braking Arrangements (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は湿式摩擦材、特に多板湿
式摩擦材に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wet friction material, and more particularly to a multi-plate wet friction material.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】従来か
ら多板湿式摩擦材の欠点として、燃費の悪い点が第１に
上げられていた。そしてこの主原因は、摩擦材と相手材
との間に介在するオイルの剪断抵抗により空転時に発生
するドラッグトルクであるといわれている。上記ドラッ
グトルクを低減させるため、従来摩擦材の表面に種々の
溝を設けることが検討されてきた。例えば図６に示すよ
うに円環状の摩擦面(1) に放射状に形成したラジアル溝
(2) 、互いに平行なパラレル溝、及び図７に示すような
ダブルパラレル溝(3) 等があるが、上記ドラッグトルク
性には限界があった。2. Description of the Related Art Conventionally, as a drawback of the multi-plate wet friction material, the first point is that fuel consumption is poor. It is said that the main cause of this is the drag torque generated during idling due to the shear resistance of the oil interposed between the friction material and the mating material. In order to reduce the drag torque, it has been conventionally considered to provide various grooves on the surface of the friction material. For example, as shown in Fig. 6, radial grooves formed radially on the annular friction surface (1).
(2) There are parallel grooves parallel to each other, and double parallel grooves (3) as shown in FIG. 7, but the drag torque property is limited.
【０００３】[0003]
【課題を解決するための手段】本発明はこれに鑑み種々
検討し、ドラッグトルク性には従来の溝形状や溝本数よ
りも、溝幅等が大きく影響することを見出した結果なさ
れたものである。SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-mentioned problems, and as a result of finding that the drag torque property is greatly affected by the groove width and the like rather than the conventional groove shape and the number of grooves. is there.
【０００４】即ち本発明は、摩擦面に凹溝を有する円環
状の湿式摩擦材において、円環の中心に関して中心角20
°以上の扇形領域で囲まれる部分からなる凹溝、及び／
又は中心角20°以上の扇形の放射状両辺と円環の内周と
の交点を通って互いに平行又は逆扇形の線分で囲まれる
部分からなる凹溝を２個以上有し、これら凹溝の合計の
面積が円環状摩擦面の面積の15〜35％であることを特徴
とするものである。That is, the present invention relates to an annular wet friction material having a concave groove on the friction surface, and a center angle of 20 with respect to the center of the annular ring.
Concave groove consisting of a portion surrounded by a fan-shaped region of ° or more, and /
Or, there are two or more recessed grooves consisting of parts that are surrounded by line segments that are parallel or reverse fan-shaped, passing through the intersections of the fan-shaped radial sides with a central angle of 20 ° or more and the inner circumference of the annulus. It is characterized in that the total area is 15 to 35% of the area of the annular friction surface.
【０００５】[0005]
【作用】本発明は図１に示すように摩擦面(1) 表面に中
心角20°以上の扇形領域で囲まれる部分からなる扇形凹
溝(4) 、及び／又は図２に示すように中心角20°以上の
扇形の放射状両辺(6)(6)と円環の内周(7) との交点を通
って互いに平行な線分(8)(9)で囲まれる部分からなる幅
広凹溝(10)を２個以上設けることによりドラッグトルク
性を改良したものであり、このような扇形凹溝(4) や幅
広凹溝(10)は図６や図７の従来溝に比べてはるかに大き
い面積である。そしてこのような本発明に係る上記凹溝
は２個以上６個程度まで自由に選択できる。さらに図３
に示すように他の従来の形状の溝(5) と組み合わせての
併用も可能であり、上記扇形凹溝(4) 及び又は従来形状
の溝(5) を油ダメ付きタイプにすればさらに効果が期待
できる。また図８に示すように逆扇形溝(11)とすること
により、溝面積の減少が可能である。また上記の（逆）
扇形凹溝や幅広凹溝のトータル面積は全摩擦面積の15〜
35％とし、望ましくは20〜30％が、摩擦特性（特に耐久
性）の維持に良好である。According to the present invention, as shown in FIG. 1, a frictional surface (1) has a fan-shaped groove (4) consisting of a portion surrounded by a fan-shaped region having a central angle of 20 ° or more, and / or a center as shown in FIG. A wide concave groove made up of parts surrounded by line segments (8) (9) parallel to each other through the intersection of the fan-shaped radial sides (6) (6) with an angle of 20 ° or more and the inner circumference (7) of the annulus. The drag torque property is improved by providing two or more (10), and such fan-shaped groove (4) and wide groove (10) are far better than the conventional grooves of FIGS. 6 and 7. It has a large area. The number of the concave grooves according to the present invention can be freely selected from 2 to 6. Furthermore, FIG.
It is also possible to use it in combination with other conventional shaped grooves (5) as shown in Fig. 4, and it is even more effective if the fan-shaped concave groove (4) and / or the conventional shaped groove (5) are of the oil damped type. Can be expected. Further, as shown in FIG. 8, the reverse fan-shaped groove (11) can reduce the groove area. Also the above (reverse)
The total area of the fan-shaped groove and wide groove is 15 ~ of the total friction area.
35%, and preferably 20 to 30% is good for maintaining the friction characteristics (particularly durability).
【０００６】[0006]
【実施例】次に本発明の実施例に説明する。図２に示す
ように互いに90°づつ離れた位置４ヵ所に、それぞれ長
さＡを図４に示すように種々変化させた幅広凹溝(10)を
設けた摩擦材を作製した。そして相手材とのクリアラン
ス1.0mm 、温度80℃及び3000rpm の条件でドラッグトル
クを測定し、それらの結果を図４に併記した。EXAMPLES Next, examples of the present invention will be described. As shown in FIG. 2, a friction material was prepared in which wide concave grooves (10) having various lengths A as shown in FIG. 4 were provided at four positions separated from each other by 90 °. Then, the drag torque was measured under the conditions of a clearance of 1.0 mm from the mating material, a temperature of 80 ° C. and 3000 rpm, and the results are also shown in FIG.
【０００７】また同じ摩擦材を用いて摩擦材の耐久性試
験として、回転数3000rpm 、慣性モーメント0.035kgfms
2 、面圧20kgf/cm2 、油温120 ℃にて5000サイクルデー
タの摩擦係数と摩耗量との結果を図５に示した。Further, as a durability test of the friction material using the same friction material, the rotation speed is 3000 rpm, the moment of inertia is 0.035 kgfms.
2, a surface pressure 20 kgf / cm 2, shows the results of the friction coefficient and the wear volume of 5000 cycles data at the oil temperature 120 ° C. Figure 5.
【０００８】図４及び図５より本発明摩擦材はドラッグ
トルクが小さく、且つ耐久性にも優れていることが明ら
かである。It is apparent from FIGS. 4 and 5 that the friction material of the present invention has a small drag torque and is excellent in durability.
【０００９】[0009]
【発明の効果】このように本発明によれば、湿式摩擦材
においてドラッグトルクを小さくでき、同時に耐久性も
優れるものである等顕著な効果を奏する。As described above, according to the present invention, in the wet type friction material, the drag torque can be reduced, and at the same time, the durability is excellent, which is a remarkable effect.
【図１】本発明の一実施例を示す平面図である。FIG. 1 is a plan view showing an embodiment of the present invention.
【図２】本発明の他の実施例を示す平面図である。FIG. 2 is a plan view showing another embodiment of the present invention.
【図３】本発明のさらに他の実施例を示す平面図であ
る。FIG. 3 is a plan view showing still another embodiment of the present invention.
【図４】溝幅とドラッグトルクとの関係を示す実測図で
ある。FIG. 4 is an actual measurement diagram showing the relationship between groove width and drag torque.
【図５】溝幅と摩擦材の耐久性との関係を示す実測図で
ある。FIG. 5 is an actual measurement diagram showing the relationship between the groove width and the durability of the friction material.
【図６】従来例を示す平面図である。FIG. 6 is a plan view showing a conventional example.
【図７】他の従来例を示す平面図である。FIG. 7 is a plan view showing another conventional example.
【図８】本発明のさらに他の実施例を示す平面図であ
る。FIG. 8 is a plan view showing still another embodiment of the present invention.
１ 摩擦面 ２ ラジアル溝 ３ ダブルパラレル溝 ４ 扇形凹溝 ５ 従来溝 ６ 放射状辺 ７ 内周 ８，９ 線分 10 幅広凹溝 11 逆扇形溝 1 friction surface 2 radial groove 3 double parallel groove 4 fan-shaped groove 5 conventional groove 6 radial side 7 inner circumference 8, 9 line segment 10 wide groove 11 reverse fan-shaped groove
Claims (1)
材において、円環の中心に関して中心角20°以上の扇形
領域で囲まれる部分からなる凹溝、及び／又は中心角20
°以上の扇形の放射状両辺と円環の内周との交点を通っ
て互いに平行又は逆扇形の線分で囲まれる部分からなる
凹溝を２個以上有し、これら凹溝の合計の面積が円環状
摩擦面の面積の15〜35％であることを特徴とする湿式摩
擦材。Claim: What is claimed is: 1. An annular wet friction material having a concave groove on the friction surface, the concave groove having a portion surrounded by a fan-shaped region having a central angle of 20 ° or more with respect to the center of the annular ring, and / Or central angle 20
There are two or more recessed grooves consisting of parts that are surrounded by line segments that are parallel or reverse fan-shaped, passing through the intersections of both fan-shaped radial sides of more than ° and the inner circumference of the annulus, and the total area of these recessed grooves is The wet friction material is characterized in that the area of the annular friction surface is 15 to 35%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19057091A JPH0510354A (en) | 1991-07-04 | 1991-07-04 | Wet friction material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19057091A JPH0510354A (en) | 1991-07-04 | 1991-07-04 | Wet friction material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0510354A true JPH0510354A (en) | 1993-01-19 |
Family
ID=16260266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19057091A Pending JPH0510354A (en) | 1991-07-04 | 1991-07-04 | Wet friction material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0510354A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008038963A (en) * | 2006-08-02 | 2008-02-21 | F C C:Kk | Multiple disk type clutch device |
| JP2014040911A (en) * | 2012-07-27 | 2014-03-06 | Jtekt Corp | Friction clutch plate, friction clutch, and driving force transmission device |
| JP2020045995A (en) * | 2018-09-19 | 2020-03-26 | 多摩川精機株式会社 | Friction material for rotary machine brake, rotary machine brake and rotary machine |
-
1991
- 1991-07-04 JP JP19057091A patent/JPH0510354A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008038963A (en) * | 2006-08-02 | 2008-02-21 | F C C:Kk | Multiple disk type clutch device |
| JP2014040911A (en) * | 2012-07-27 | 2014-03-06 | Jtekt Corp | Friction clutch plate, friction clutch, and driving force transmission device |
| JP2020045995A (en) * | 2018-09-19 | 2020-03-26 | 多摩川精機株式会社 | Friction material for rotary machine brake, rotary machine brake and rotary machine |
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