JPH0325660B2 - - Google Patents
Info
- Publication number
- JPH0325660B2 JPH0325660B2 JP62131877A JP13187787A JPH0325660B2 JP H0325660 B2 JPH0325660 B2 JP H0325660B2 JP 62131877 A JP62131877 A JP 62131877A JP 13187787 A JP13187787 A JP 13187787A JP H0325660 B2 JPH0325660 B2 JP H0325660B2
- Authority
- JP
- Japan
- Prior art keywords
- friction
- load
- friction material
- low
- coefficient
- 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.)
- Expired - Lifetime
Links
Landscapes
- Mechanical Operated Clutches (AREA)
- Braking Arrangements (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、クラツチ及びブレーキ等に用いられ
る摩擦板に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a friction plate used in clutches, brakes, etc.
従来技術及びその問題点
コアプレート固着可能面積全面に渡り摩擦材を
固着せしめた従来の摩擦板に対して、摩擦材をセ
グメント状とし、かつその使用量を大幅に減少さ
せうるものとして、出願人は既に特願昭61−
260647号及び特願昭62−87117号の発明を提案し
ているが、その実用性能は、コアプレートに固着
される各摩擦材の固有の特性を超えることはでき
ない。Prior Art and its Problems In contrast to the conventional friction plate in which a friction material is fixed over the entire area where a core plate can be fixed, the applicant has proposed a method in which the friction material is made into a segment shape and the amount of the material used can be significantly reduced. has already been applied for in 1988.
Although the inventions of No. 260647 and Japanese Patent Application No. 62-87117 have been proposed, their practical performance cannot exceed the inherent characteristics of each friction material fixed to the core plate.
摩擦材には、代表例として建設用、産業車両用
のクラツチに使用される摩擦材や、乗用車の自動
変速機用のクラツチに使用される摩擦材などがあ
り、その相互の特性は、乗用車に使用される摩擦
材は、動摩擦係数が高く、一方、産業車両用に利
用されるものは比較的ロツクアツプ（係合の作動
完了時）摩擦係数又は静摩擦係数が高くなつてい
る。 Typical examples of friction materials include friction materials used in clutches for construction and industrial vehicles, and friction materials used in clutches for automatic transmissions in passenger cars. The friction materials used have a high dynamic friction coefficient, while those used for industrial vehicles have a relatively high lock-up (on completion of engagement) friction coefficient or static friction coefficient.
乗用車の自動変速機用に使用される、弾性変形
率が大きい低負荷摩擦材は、前述のように動摩擦
係数が高く、ロツクアツプ又は静摩擦係数は低い
ので、結合時（係合完了時）のシヨツクは少ない
が、強度あるいは耐熱性には劣る。一方、産業用
車両に使用される高負荷摩擦材は、ロツクアツプ
摩擦係数または静摩擦係数が高いため、結合時
（係合完了時）にシヨツクを伴いやすいが、当然
強度と耐熱性には優れている。 Low-load friction materials with a large elastic deformation rate used for automatic transmissions of passenger cars have a high coefficient of dynamic friction and a low coefficient of lock-up or static friction, as mentioned above, so the shock when coupled (on completion of engagement) is Although it is small, it is inferior in strength or heat resistance. On the other hand, high-load friction materials used in industrial vehicles have high lock-up friction coefficients or static friction coefficients, so they tend to cause shock when coupled (on completion of engagement), but they naturally have excellent strength and heat resistance. .
本発明の目的は、高負荷及び低負荷摩擦材をセ
グメントによる組合せで使用し、摩擦板の係合時
の各段階において、各々の材質の特性を生かすこ
とのできる摩擦板を提供することである。 An object of the present invention is to provide a friction plate that uses a combination of high-load and low-load friction materials in segments, and can take advantage of the characteristics of each material at each stage of engagement of the friction plate. .
なお、本発明では、以下「高低」及び「大小」
という語を使用するが、これらの語は前記２種の
用途における摩擦材を、相対的に比較した場合を
示すものとする。 In addition, in the present invention, hereinafter, "high/low" and "large/small"
However, these terms indicate a relative comparison of the friction materials for the above two types of uses.
問題点を解決するための手段
本発明は、コアプレートに複数のセグメント状
摩擦材を固着してなるセグメント式摩擦板におい
て、前記摩擦材は、弾性変形率の高い低負荷摩擦
材と、弾性変形率の低い高負荷摩擦材の各セグメ
ントからなり、前記低負荷摩擦材セグメントの厚
みが前記高負荷摩擦材セグメントの厚みより厚い
という構成によつて前記問題点を解決した。Means for Solving the Problems The present invention provides a segmented friction plate in which a plurality of segmented friction materials are fixed to a core plate, in which the friction materials include a low-load friction material with a high rate of elastic deformation, and a low-load friction material with a high elastic deformation rate. The above-mentioned problem has been solved by a configuration in which each segment is made of high-load friction material with a low friction coefficient, and the thickness of the low-load friction material segment is thicker than the thickness of the high-load friction material segment.
作 用
前記のように材質の異なる複数種のセグメント
は、相対的に弾性変形率と動摩擦係数が高いセグ
メントは相対的に厚く、また、相対的に弾性変形
率が低く静摩擦係数が大きいセグメントは相対的
に薄くなるように、各厚みが設定される。Function As mentioned above, among multiple types of segments made of different materials, segments with a relatively high elastic deformation rate and dynamic friction coefficient are relatively thick, and segments with a relatively low elastic deformation rate and a large static friction coefficient are relatively thick. Each thickness is set so that it becomes thinner.
クラツチに例をとれば、摩擦係合開始時には、
低圧、高速状態で低負荷摩擦材が係合を開始し、
その高い動摩擦係数で先に擦り合い、相対回転数
を減じさせる。そして、昇圧に伴つてその高い弾
性変形率により、低負荷摩擦材は圧縮される。そ
こで、高負荷摩擦材も摺動を始め、摩擦熱を分担
する。更に、係合が進行すると、高負荷摩擦材が
主として負荷を受けるので、高負荷摩擦材の特性
が強く現われるが、低負荷摩擦材により動摩擦係
数の全体レベルが上げられているので、高負荷摩
擦材の高いロツクアツプ及び静摩擦係数との相対
差が縮小され結果として滑らかな作動特性が得ら
れる。 Taking the example of a clutch, at the start of frictional engagement,
The low-load friction material starts engaging under low pressure and high speed conditions,
Their high coefficient of kinetic friction allows them to rub against each other first, reducing the relative rotational speed. As the pressure increases, the low-load friction material is compressed due to its high elastic deformation rate. Therefore, the high-load friction material also starts sliding and shares the frictional heat. Furthermore, as the engagement progresses, the high-load friction material mainly receives the load, so the characteristics of the high-load friction material appear strongly, but the low-load friction material increases the overall level of the coefficient of kinetic friction, so the high-load friction material The relative difference between the material's high lockup and static friction coefficient is reduced, resulting in smooth operating characteristics.
係合完了後の、静的クラツチトルク容量確保の
ための高面圧条件に対しても、主として高負荷摩
擦材が荷重を支えることで対応でき、また高負荷
摩擦材の高静摩擦係数を利用することもできる。 After engagement is completed, high surface pressure conditions required to ensure static clutch torque capacity can be dealt with mainly by the high-load friction material supporting the load, and the high static friction coefficient of the high-load friction material can also be used. You can also do that.
第１，２図には本発明による２種の材質からな
るセグメント式摩擦板１０の平面図及び一部断面
図を示す。コアプレート１２上には、第１の摩擦
材であるセグメント状高負荷摩擦材１４と第２の
摩擦材であるセグメント状低負荷摩擦材１６が、
周方向に間隔をおいてコアプレート１２の両面に
固着されている。各セグメントの摩擦材はその材
質が異なり、高負荷摩擦材１４は低負荷摩擦材１
６よりも厚み方向に薄い構造となつている。 1 and 2 show a plan view and a partial sectional view of a segment type friction plate 10 made of two types of materials according to the present invention. On the core plate 12, a segment-shaped high-load friction material 14, which is a first friction material, and a segment-shaped low-load friction material 16, which is a second friction material, are arranged.
They are fixed to both sides of the core plate 12 at intervals in the circumferential direction. The friction materials of each segment are different in material, and the high load friction material 14 is different from the low load friction material 1.
It has a structure that is thinner than 6 in the thickness direction.
高負荷摩擦材１４は主として建設、産業用車両
に使用されている、グラフアイトを多量に含む高
密度、高強度の材質からなり、耐熱性にも優れて
いる。 The high-load friction material 14 is made of a high-density, high-strength material containing a large amount of graphite, which is mainly used in construction and industrial vehicles, and has excellent heat resistance.
一方、低負荷摩擦材１６は動摩擦係数が高く、
弾性変形率も高い材質、例えば樹脂系材質からな
り、高負荷摩擦材１４よりも厚いため、係合開始
時においては、まず、この低負荷摩擦材１６が係
合を開始し、またその高い弾性変形率のためある
程度係合が進行すると圧縮され、そこで高負荷摩
擦材１４も摺動を始め、双方がトルクを伝達する
ように作用する。 On the other hand, the low-load friction material 16 has a high dynamic friction coefficient,
It is made of a material with a high rate of elastic deformation, such as a resin material, and is thicker than the high-load friction material 14. Therefore, at the start of engagement, the low-load friction material 16 starts engagement first, and its high elasticity Due to the deformation rate, when the engagement progresses to a certain extent, it is compressed, and then the high-load friction material 14 also begins to slide, and both act to transmit torque.
本実施例で用いた摩擦板と、高負荷用摩擦材単
体及び低負荷用摩擦材単体の結合サイクル200で
の摩擦耐久テストの「摩擦係数−速度」特性を第
３図に示す。図中ｘ軸がＳの時の値は各々の静摩
擦係数を表す。相対的回転速度が０のロツクアツ
プ摩擦係数と静摩擦係数に差があるのは、ロツク
アツプ時に発生する摩擦熱と油膜に起因してい
る。同図に示すように、低負荷摩擦材は相対回転
数が高いとき、例えば1200rpmにおいては、動摩
擦係数が高く、一方、高負荷摩擦材は、相対回転
数が低いとき、例えばロツクアツプ時（相対回転
数が０になつた時）の摩擦係数及び静摩擦係数が
高い。 FIG. 3 shows the "friction coefficient-velocity" characteristics of the friction durability test of the friction plate used in this example, a single high-load friction material, and a single low-load friction material in a combined cycle of 200. In the figure, the values when the x-axis is S represent each static friction coefficient. The difference between the lockup friction coefficient and the static friction coefficient when the relative rotational speed is 0 is due to the frictional heat and oil film generated during lockup. As shown in the figure, low-load friction materials have a high dynamic friction coefficient when the relative rotation speed is high, e.g. 1200 rpm, while high-load friction materials have a high coefficient of dynamic friction when the relative rotation speed is low, e.g. When the number becomes 0), the coefficient of friction and coefficient of static friction are high.
本実施例の組合せの摩擦材はその両摩擦材を複
合的に組合せた特性を有し、相対回転速度が高い
ときには、低負荷摩擦材の高い動摩擦係数を利用
し、相対回転速度が低い時や係合完了時には、高
負荷摩擦材の高いロツクアツプ摩擦係数を利用す
ることができる。 The combination of friction materials in this example has characteristics that are a composite combination of both friction materials, and when the relative rotation speed is high, the high dynamic friction coefficient of the low-load friction material is utilized, and when the relative rotation speed is low, the high dynamic friction coefficient of the low-load friction material is utilized. Upon completion of engagement, the high lock-up friction coefficient of the high-load friction material can be utilized.
本実施例の摩擦板を用いた場合の作動を次に示
す。 The operation when using the friction plate of this example will be described below.
湿式クラツチ及びブレーキは一般に係合開始時
に最大相対回転速度を有し、その押圧力は、係合
開始時より徐々にもしくは予め設定された段階を
踏んで上昇し、係合を完了する。完了後は、静的
トルク伝達維持のため更に押圧力が加えられる。
クラツチを例にとれば、このような機能に対し
て、本実施例の摩擦材は、まず、相対回転数が高
く押圧力の低い係合開始時には、高い動摩擦係数
を備えた低負荷摩擦材が摺動し、押圧力の増加に
伴い、低負荷摩擦材が圧縮され、これより厚みの
薄い高負荷摩擦材が摺動し始める。そこで、高負
荷摩擦材が荷重を主として受け、高負荷摩擦材の
高いロツクアツプ摩擦係数の特性が摩擦板全体に
強く現れる。ところが、同時に、低負荷摩擦材の
特性も有するため、高負荷摩擦材の有するロツク
アツプ摩擦係数と動摩擦係数の大きな差が制限さ
れ、結果として係合完了迄滑らかな作動特性を得
ることができる。係合完了時にはクラツチのトル
ク伝達面は高面圧になるが、高負荷摩擦材の影響
を強く受けるため、この高い静摩擦係数を充分に
利用することができる。 Wet type clutches and brakes generally have a maximum relative rotational speed at the beginning of engagement, and the pressing force increases gradually or in preset steps from the time at the beginning of engagement to complete engagement. After completion, further pressing force is applied to maintain static torque transmission.
Taking a clutch as an example, the friction material of this embodiment has a low load friction material with a high coefficient of dynamic friction at the start of engagement when the relative rotation speed is high and the pressing force is low. As the material slides and the pressing force increases, the low-load friction material is compressed, and the thinner high-load friction material begins to slide. Therefore, the high-load friction material mainly receives the load, and the characteristic of the high lock-up friction coefficient of the high-load friction material appears strongly throughout the friction plate. However, since it also has the characteristics of a low-load friction material, the large difference between the lock-up friction coefficient and the dynamic friction coefficient of the high-load friction material is limited, and as a result, smooth operating characteristics can be obtained until engagement is completed. When the engagement is completed, the torque transmission surface of the clutch has a high surface pressure, but since it is strongly influenced by the high-load friction material, this high coefficient of static friction can be fully utilized.
次に、本発明で用いた摩擦板が、実用に耐え得
るか否かを確かめるため、実験を行い、その結果
を第４図に示す。 Next, in order to confirm whether the friction plate used in the present invention can withstand practical use, an experiment was conducted, and the results are shown in FIG.
第４図に示す実験は、静摩擦係数μs、第３図に
対応する相対回転速度０時の摩擦係数μ0、同じく
相対回転速度1200rpm時の摩擦係数μ1200、及び
μ0／μ1200の相対比の経時変化を各々10000サイク
ルまでのサイクル数に対して表わしてある。本実
験結果より、摩擦係数及び相対比は経時的に変化
することなく、初期の特性を維持し、耐久性は実
用上問題のないことが実証された。 The experiment shown in Figure 4 is based on the static friction coefficient μs, the friction coefficient μ 0 at a relative rotation speed of 0 corresponding to Figure 3, the friction coefficient μ 1200 at a relative rotation speed of 1200 rpm, and the relative ratio of μ 0 /μ 1200 . The changes over time are each expressed for the number of cycles up to 10,000 cycles. The results of this experiment demonstrated that the friction coefficient and relative ratio did not change over time, maintained the initial characteristics, and had no practical problems in durability.
この実験の場合、各々の摩擦材の摩耗量が問題
となるが、その摩耗量は摩擦板１枚当たり両面に
おいて、低負荷摩擦材は65ミクロン、高負荷摩擦
材は35ミクロンであり、各々の摩耗量を見る限り
ではその耐久性も問題のないことが実証された。
また、相対速度1200rpm回転時の摩擦係数と相対
回転０時、即ち、ロツクアツプ時の摩擦係数の比
がほぼ１であり、第３図に示される高負荷摩擦材
の相対比と比べれば、低負荷摩擦材を存在させる
ことにより、本実施例では相対比が低く押えれら
れており、係合シヨツクの少なくなることが実証
できた。 In the case of this experiment, the amount of wear of each friction material is a problem, and the amount of wear is 65 microns for the low-load friction material and 35 microns for the high-load friction material on both sides of each friction plate. Judging by the amount of wear, it was proven that there were no problems with its durability.
In addition, the ratio of the friction coefficient when rotating at a relative speed of 1200 rpm and the friction coefficient when relative rotation is 0, that is, when locked up, is approximately 1, and compared to the relative ratio of the high-load friction material shown in Fig. 3, the low-load It was demonstrated that by the presence of the friction material, the relative ratio was kept low in this example, and the number of engagement shocks was reduced.
なお、本発明は、湿式摩擦板を主たる対象とし
ているが、本発明の技術思想そのものは、乾式摩
擦板にも適用できるものである。 Although the present invention is mainly directed to wet friction plates, the technical concept of the present invention itself can also be applied to dry friction plates.
発明の効果
本発明の構成によれば、低負荷摩擦材と高負荷
摩擦材の相互の特性を生かし、滑らかな係合特性
と耐久性、耐熱性を合わせもつた摩擦板を得るこ
とができる。Effects of the Invention According to the configuration of the present invention, it is possible to obtain a friction plate that has smooth engagement characteristics, durability, and heat resistance by taking advantage of the mutual characteristics of the low-load friction material and the high-load friction material.
また、新たな開発コストをかけず、高価な高負
荷摩擦材の使用をできるだけ押え、安価な低負荷
摩擦材を利用して高負荷摩擦材に匹敵する高性能
の摩擦板を得ることができる。 Furthermore, it is possible to obtain a high-performance friction plate comparable to high-load friction materials by minimizing the use of expensive high-load friction materials and using inexpensive low-load friction materials without incurring new development costs.
なお、摩擦材の使用量を大幅に削減し、セグメ
ントの歩留率を100％にできる前述の先願の発明
の効果をそのまま発揮できることはいうまでもな
い。 It goes without saying that the effects of the invention of the earlier application mentioned above, which can significantly reduce the amount of friction material used and achieve a segment yield rate of 100%, can still be achieved.
第１図は本発明の実施例の摩擦板の正面図、第
２図は第１図の２−２線方向拡大断面図、第３図
は低負荷摩擦材、高負荷摩擦材及び組合せ摩擦材
の「摩擦係数−速度」の特性を表すグラフ、第４
図は本発明の実施例の耐久試験結果を示すグラフ
である。
１０……摩擦板、１２……コアプレート、１４
……高負荷摩擦材、１６……低負荷摩擦材。
Fig. 1 is a front view of a friction plate according to an embodiment of the present invention, Fig. 2 is an enlarged sectional view taken along line 2-2 in Fig. 1, and Fig. 3 is a low-load friction material, a high-load friction material, and a combination friction material. Graph showing the characteristics of "friction coefficient - speed", 4th
The figure is a graph showing the durability test results of Examples of the present invention. 10...Friction plate, 12...Core plate, 14
...High load friction material, 16...Low load friction material.
Claims (1)
固着してなるセグメント式摩擦板において、 前記摩擦材は、弾性変形率の高い低負荷摩擦材
と、弾性変形率の低い高負荷摩擦材の各セグメン
トからなり、 前記低負荷摩擦材セグメントの厚みが前記高負
荷摩擦材セグメントの厚みより厚いことを特徴と
する、 セグメント式摩擦板。[Claims] 1. A segmented friction plate in which a plurality of segment-shaped friction materials are fixed to a core plate, wherein the friction materials include a low-load friction material with a high elastic deformation rate and a high-load friction material with a low elastic deformation rate. A segmented friction plate comprising each segment of friction material, wherein the low-load friction material segment is thicker than the high-load friction material segment.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13187787A JPS63297832A (en) | 1987-05-29 | 1987-05-29 | Segment type friction plate with different thickness |
| DE8787309775T DE3770412D1 (en) | 1986-11-04 | 1987-11-04 | DISC WITH FRICTION SEGMENTS. |
| EP19870309775 EP0267027B1 (en) | 1986-11-04 | 1987-11-04 | Segment-type friction plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13187787A JPS63297832A (en) | 1987-05-29 | 1987-05-29 | Segment type friction plate with different thickness |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63297832A JPS63297832A (en) | 1988-12-05 |
| JPH0325660B2 true JPH0325660B2 (en) | 1991-04-08 |
Family
ID=15068230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13187787A Granted JPS63297832A (en) | 1986-11-04 | 1987-05-29 | Segment type friction plate with different thickness |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63297832A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5680921A (en) * | 1996-02-07 | 1997-10-28 | Borg-Warner Automotive, Inc. | Transmission band assembly |
| JP2007155096A (en) * | 2005-12-08 | 2007-06-21 | Nsk Warner Kk | Wet type multiple disc clutch |
| JP2007218308A (en) | 2006-02-15 | 2007-08-30 | Nsk Warner Kk | Wet type multiple disc clutch |
| JP2007278354A (en) | 2006-04-04 | 2007-10-25 | Nsk Warner Kk | Wet type multiple disc clutch |
| JP4852340B2 (en) | 2006-04-28 | 2012-01-11 | Ｎｓｋワーナー株式会社 | Wet multi-plate clutch |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5993522A (en) * | 1982-11-19 | 1984-05-30 | Nissan Motor Co Ltd | Clutch disc |
-
1987
- 1987-05-29 JP JP13187787A patent/JPS63297832A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63297832A (en) | 1988-12-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2927673A (en) | Energy transmitting device | |
| US6062367A (en) | Friction plate | |
| EP0467518B1 (en) | Ceramic clutch separator plates | |
| JP4504657B2 (en) | Disc assembly backing plate | |
| US3750788A (en) | Clutch or brake | |
| KR900001633B1 (en) | Clutch disk | |
| US6035991A (en) | Blocked slot clutch plate lining | |
| JPS62233531A (en) | Frictional brake | |
| JPH10169681A (en) | Combination structure for friction plate in one side wet friction engaging device | |
| US5730259A (en) | Method of producing wet frictional plate | |
| JPH0325660B2 (en) | ||
| JPS5965620A (en) | Multi-plate friction device | |
| JP2004211781A (en) | Friction plate for wet clutch | |
| JPS61192553A (en) | Constitutional member consisting of polymer material particularly reinforced by fibrous filler | |
| JPH02120516A (en) | Follow-up clutch disc assembly | |
| CA1078752A (en) | Disc brake | |
| US20040159519A1 (en) | Clutch reaction plates with cooling flow path | |
| US3164236A (en) | Clutch plates and the like | |
| US20030029687A1 (en) | Friction disc and method for making a lining forming it | |
| JP2600050Y2 (en) | Brake band | |
| JPH0346695B2 (en) | ||
| JPH0128349Y2 (en) | ||
| JPH0247775Y2 (en) | ||
| US4140208A (en) | Centrifugally engaged servo clutch for torque converter lock-up | |
| US6634478B2 (en) | Rapid release clutch pack |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |