JPH04114084A - Friction material for disc brake - Google Patents
Friction material for disc brakeInfo
- Publication number
- JPH04114084A JPH04114084A JP23182390A JP23182390A JPH04114084A JP H04114084 A JPH04114084 A JP H04114084A JP 23182390 A JP23182390 A JP 23182390A JP 23182390 A JP23182390 A JP 23182390A JP H04114084 A JPH04114084 A JP H04114084A
- Authority
- JP
- Japan
- Prior art keywords
- friction material
- central zone
- fillers
- friction
- disc
- 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.)
- Granted
Links
- 239000002783 friction material Substances 0.000 title claims abstract description 41
- 150000002484 inorganic compounds Chemical class 0.000 claims abstract description 10
- 229910010272 inorganic material Inorganic materials 0.000 claims abstract description 10
- 239000000945 filler Substances 0.000 claims abstract description 9
- 239000013078 crystal Substances 0.000 claims abstract description 8
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 7
- 229910052742 iron Inorganic materials 0.000 claims abstract description 7
- 239000010445 mica Substances 0.000 claims abstract description 6
- 229910052618 mica group Inorganic materials 0.000 claims abstract description 6
- 239000005995 Aluminium silicate Substances 0.000 claims abstract description 5
- 235000012211 aluminium silicate Nutrition 0.000 claims abstract description 5
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 5
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims abstract description 5
- 239000000454 talc Substances 0.000 claims abstract description 5
- 229910052623 talc Inorganic materials 0.000 claims abstract description 5
- 235000012222 talc Nutrition 0.000 claims abstract description 5
- 239000010455 vermiculite Substances 0.000 claims abstract description 5
- 229910052902 vermiculite Inorganic materials 0.000 claims abstract description 5
- 235000019354 vermiculite Nutrition 0.000 claims abstract description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000010439 graphite Substances 0.000 claims abstract description 4
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 4
- 239000002344 surface layer Substances 0.000 claims abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 4
- 150000004679 hydroxides Chemical class 0.000 claims description 4
- 239000011777 magnesium Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 239000003082 abrasive agent Substances 0.000 claims description 3
- 239000011230 binding agent Substances 0.000 claims description 3
- 239000000314 lubricant Substances 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims 1
- 230000001070 adhesive effect Effects 0.000 claims 1
- 239000011347 resin Substances 0.000 claims 1
- 229920005989 resin Polymers 0.000 claims 1
- 229920001187 thermosetting polymer Polymers 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 3
- 239000010425 asbestos Substances 0.000 description 7
- 229910052895 riebeckite Inorganic materials 0.000 description 7
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 6
- 238000003856 thermoforming Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 229910052593 corundum Inorganic materials 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 229910000000 metal hydroxide Inorganic materials 0.000 description 2
- 150000004692 metal hydroxides Chemical class 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 description 2
- 244000226021 Anacardium occidentale Species 0.000 description 1
- 229910003178 Mo2C Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- -1 aluminum Chemical compound 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 235000020226 cashew nut Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000013007 heat curing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 229910003465 moissanite Inorganic materials 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000012766 organic filler Substances 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 102220092880 rs148223897 Human genes 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Abstract
Description
【発明の詳細な説明】
「産業上の利用分野」
この発明は自動車などの車両又は産業用機械用のディス
クブレーキの摩擦材、特に摩擦相手たるディスクロータ
に対する摩擦材の攻撃性の減少及び低周波のブレーキノ
イズの発生を防止するための摩擦材（パッド）の構造に
関するものである。Detailed Description of the Invention "Industrial Application Field" This invention relates to friction materials for disc brakes for vehicles such as automobiles or industrial machines, and particularly for reducing the aggressiveness of the friction material against a disc rotor, which is the friction partner, and This invention relates to the structure of a friction material (pad) for preventing the occurrence of brake noise.
「従来の技術」
ディスクブレーキは回転するディスクロータの両側から
パッドと称する摩擦材を押圧してディスクロータの回転
を制動（ブレーキ）する装置である。そのパッドは、第
１図等に外観を示すように金属製の裏金３の片面に摩擦
材１を接着した構造のものである。"Prior Art" A disc brake is a device that presses friction materials called pads from both sides of a rotating disc rotor to brake the rotation of the disc rotor. The pad has a structure in which a friction material 1 is adhered to one side of a metal backing 3, as shown in FIG.
従来の摩擦材（パッド）はアスベスト繊維を基材とする
ものであったが、アスベストは公害発生源となるので、
最近はアスベストを含まない（アスベストフリー）のも
のが使用されるようになっている。それはアスベスト以
外のスチールウール。Conventional friction materials (pads) were based on asbestos fibers, but asbestos is a source of pollution,
Recently, materials that do not contain asbestos (asbestos-free) are being used. It is steel wool other than asbestos.
アラミド繊維（商品名ケプラパルプ）等の有機無機繊維
を基材とし、カシューダスト、硫酸バリウム、ゴム等の
有機無機充項剤、摩擦係数調整剤としての２硫化モリブ
デン、グラファイト等の潤滑剤２さらに摩擦増加剤とし
てＡｌ２Ｏ３，８ｉＯｚ 、 ＺｒＯ２等の酸化物やＳ
ｉＣ、ｙ６２ｃ等の非酸化物系および鉄粉、鉄ｍ維など
の通常ディスクロータと同等もしくはそれ以上の硬度を
持つ研磨剤にフェノール樹脂等を結合剤（バインダー）
として混合しプレス熱成形、焼結して製造されている。The base material is organic and inorganic fibers such as aramid fibers (trade name Kepra pulp), organic and inorganic fillers such as cashew dust, barium sulfate, and rubber, and lubricants such as molybdenum disulfide and graphite as friction coefficient modifiers2.Friction Oxides such as Al2O3, 8iOz and ZrO2 and S
A binder is a non-oxide type such as iC, Y62C, iron powder, iron fiber, etc., which has a hardness equal to or higher than that of a regular disc rotor, and a phenol resin etc.
It is manufactured by mixing, press thermoforming, and sintering.
車両用ディスクブレーキはシャダー（数〜数十Ｈｚの振
動が原因の衝撃音）を発生しにくい事が特徴として上げ
られているが、実際には完全にシャダーを無くすことは
できない。この現象はディスクロータの厚みが不均一と
なっｔ：時に生ずるものである。ディスクロータの厚さ
が不均一となるのは、使用中のディスクロータの発錆或
いはディスクロータの偏摩耗等に起因する。その偏摩耗
は、（ａ）回転に伴うディスクの振れ、（ｂ）ブレーキ
のキャリバーの剛性不足、忙）制動しない時にも常時摩
擦材がディスクロータに接触する、いわゆる引きずり現
象が主因である。Although vehicle disc brakes are said to be less likely to generate shudder (impact noise caused by vibrations of several to several tens of Hz), in reality, shudder cannot be completely eliminated. This phenomenon occurs when the thickness of the disc rotor becomes non-uniform. The reason why the thickness of the disc rotor becomes non-uniform is due to rusting of the disc rotor during use or uneven wear of the disc rotor. The main causes of this uneven wear are (a) vibration of the disc as it rotates, (b) insufficient rigidity of the brake caliber, and (b) the so-called dragging phenomenon in which the friction material constantly comes into contact with the disc rotor even when not braking.
この引きずり現象は、第４図に模式的に示すように、非
制動状態でディスクロータ２が図面の矢印入方向に回転
する時にディスクロータグに対して摩擦材１が傾斜し、
片側では摩擦材１のリーディング側の端部Ｂ１反対側で
はトレーリング側の端部Ｃにおいて接触する状態、すな
わち片当たりの状態になって生ずる。As schematically shown in FIG. 4, this dragging phenomenon is caused by the friction material 1 tilting with respect to the disc rotor tag when the disc rotor 2 rotates in the direction of the arrow in the drawing in a non-braking state.
On one side, the leading end B1 of the friction material 1 is in contact with the trailing end C on the other side, that is, in a state of uneven contact.
この問題を解決するために、例えば特開昭６３２５９２
３０号、特開平１−３０７５２７号には摩擦材の両端部
帯域を中央部帯域に比し研磨剤量を減少した材質とする
ことが提案されている。In order to solve this problem, for example, Japanese Patent Application Laid-Open No. 632592
No. 30 and JP-A-1-307527 propose that both end zones of the friction material be made of a material with a reduced amount of abrasive compared to the central zone.
そうすると前記引きずり状態でのディスクロータの摩耗
を減少することができ、ディスクロータの偏摩耗、従っ
てジ ダーの発生を減少することができるというもので
ある。By doing so, it is possible to reduce the wear of the disc rotor in the dragging state, and the uneven wear of the disc rotor, and therefore the occurrence of jitter, can be reduced.
「発明が解決しようとする課題Ｊ
前述のように最近はアスベストフリーの摩擦材が開発さ
れているが、これらの摩擦材は従来のアスベスト系の摩
擦材に比し、シャダーの発生以外に、ＩＫＨｚ 以下
の低周波のブレーキノイズを発生し易く、場合によって
はブレーキ制動時に車体の振動を伴うことがあり運転者
に多大の不快感を与えるという新しい問題が生じている
。``Problem to be solved by the invention J As mentioned above, asbestos-free friction materials have recently been developed, but compared to conventional asbestos-based friction materials, these friction materials have problems in addition to the generation of shudder. A new problem has arisen in that low-frequency brake noise is likely to occur, and in some cases, the vehicle body may be vibrated during braking, causing great discomfort to the driver.
この発明は前記のような問題点を解決するためになされ
たので、ブレーキ制動時にシャダーおよび低周波のブレ
ーキノイズを発生しない摩擦材を提供することを目的と
するものである。The present invention was made to solve the above-mentioned problems, and therefore, it is an object of the present invention to provide a friction material that does not generate shudder or low-frequency brake noise during braking.
「課題を解決するための手段」
この発明はディスクブレーキ用摩擦材において、アスベ
ストでない繊維を基材とし、充填剤、潤滑剤、研磨剤を
結合剤を用いて熱成形したものを裏金に熱硬化性制脂接
揄剤によって接着したものであり、摩擦材はディスクの
回転方向にそって両端部帯域と中央部帯域に分けて構成
し、端部帯域における研磨剤の含有率が少なくともその
摺動表面層で中央部帯域の含有率に比較し少なくなって
おり、且つ端部帯域にはグラファイト、２疏化モリブデ
ン以外のマイカ、タルク、バーミキュライト。``Means for Solving the Problems'' This invention relates to a friction material for disc brakes that uses non-asbestos fibers as a base material and thermoforms fillers, lubricants, and abrasives using a binder, and then heat-cures the material on a backing metal. The friction material is divided into both end zones and a central zone along the direction of rotation of the disk, and the abrasive content in the end zones is at least as high as the sliding surface. The content in the surface layer is lower than that in the central zone, and the edge zones contain mica, talc, and vermiculite other than graphite and molybdenum disulfide.
カオリン等の層状の結晶構造を持つ無機化合物。An inorganic compound with a layered crystal structure such as kaolin.
アルミニウム、マグネシウム、鉄の水酸化物を少なくと
も２種以上含む配合としたものであるっこの場合に端部
帯域の研磨剤の含有率は中央部帯域と同等でもよく、或
いは回転方向のリーディング側（前端側）端部帯域の含
有率のみを少なくしてもよい。In this case, the content of the abrasive in the end zone may be the same as that in the center zone, or the content of the abrasive on the leading side in the direction of rotation ( Only the content of the end zone (front end side) may be reduced.
さらに中央部帯域の一部をその残部に比し研磨剤の含有
率を低くし且つマイカ等の層状結晶構造の無機化合物、
アルミニウム等の水酸化物を２種以上含有する材質とす
ることもスティックスリップを防止するには効果的であ
るう
通常ディスクブレーキではパッドの引きずりを完全には
無くすことはできず、第４図に示すように、片当たり状
態となり両端部が非制動時でも相手のディスクロータに
接触して攻撃する。それ故ティスクロータと同等あるい
はそれ以上の硬度を有する研磨剤、例えばＡｌ２Ｏ３，
ＳｉＯ２，ＺｒＯ２等の酸化物やＳｉＣ、Ｍｏ２Ｃ等の
非酸化物系および鉄粉、鉄繊維などは相手ディスクロー
タを摩耗させる。本発明のようにバンドの摩擦材の両端
部帯域の研磨剤含有率を低くするとディスクロータの偏
摩耗を減少できる。Furthermore, a part of the central zone has a lower abrasive content than the rest, and an inorganic compound with a layered crystal structure such as mica,
Using a material containing two or more types of hydroxide, such as aluminum, is also effective in preventing stick-slip.However, with normal disc brakes, it is not possible to completely eliminate pad drag, as shown in Figure 4. As shown, a one-sided collision occurs and both ends contact and attack the opponent's disc rotor even when braking is not applied. Therefore, an abrasive with a hardness equal to or higher than that of the rotor, such as Al2O3,
Oxides such as SiO2 and ZrO2, non-oxides such as SiC and Mo2C, iron powder, and iron fibers wear out the mating disc rotor. By lowering the abrasive content in both end zones of the friction material of the band as in the present invention, uneven wear of the disc rotor can be reduced.
一方ＩＫＨｚ 以下の低周波のブレーキノイズはディ
スクロータと摩擦材が摺動する際のスティックスリップ
現象が原因である。一般にスティックスリップ現象は静
止摩擦係数が大きく、動摩擦係数が小さい摩擦材、即ち
華擦係数の比Ｒ＝静止摩擦係数μＳ／動摩擦係数μｄが
大きい程起こり易いと考えられている。そこでこのＲに
着目してスティックスリップ現象を抑制する材料を探し
た。その結果マイカ、タルク、バーミキュライト、カオ
リン等の１状の結晶構造を持つ無機化合物、アルミニウ
ム、マグネシウム、鉄の水酸化物がスティ２・クスリノ
プ現象を減少し、異音の発生防出に対し有効であること
を見出したのである。また実験によれば制動時において
も摩擦材はディスクロータの回転方向の先端部から当た
り始め、摩擦材のリーディング側の摩擦材から生ずる摩
耗粉がトレーリング側へ移動する過程で摩擦熱により表
面に融着層を形成するが、その融着層に前記の１状の結
晶構造を有する無機化合物、金属の水酸化物が存在する
と摩擦材とディスクロータとの接着が防止されスティッ
クスリップ現象が軽減する。On the other hand, low frequency brake noise below IKHz is caused by the stick-slip phenomenon when the disc rotor and friction material slide. It is generally believed that the stick-slip phenomenon is more likely to occur in a friction material that has a larger coefficient of static friction and a smaller coefficient of kinetic friction, that is, a ratio of friction coefficients R=static friction coefficient μS/dynamic friction coefficient μd. Therefore, we focused on this R and searched for a material that suppresses the stick-slip phenomenon. As a result, inorganic compounds with a monocrystalline structure such as mica, talc, vermiculite, and kaolin, as well as hydroxides of aluminum, magnesium, and iron, are effective in reducing the Sti2-Kuslinop phenomenon and preventing abnormal noise. I discovered something. Additionally, experiments have shown that even during braking, the friction material starts to hit the disc rotor from the tip in the rotating direction, and as the abrasion powder generated from the friction material on the leading side moves toward the trailing side, it is heated by friction and is applied to the surface. A fusing layer is formed, and if the above-mentioned inorganic compound or metal hydroxide having a monocrystalline structure is present in the fusing layer, adhesion between the friction material and the disc rotor is prevented and the stick-slip phenomenon is reduced. .
さらに実験の結果、端部帯域に含まれる層状結晶構造の
無機化合物またはアルミニウム、マグネシウム、鉄等の
水酸化物の含有量合計は２〜６０容積予、好ましくは３
〜５５容積チ、より好ましくは４〜５０容漬チであるこ
とがわかった。これらの物質が２容積チ以下では低周波
ブレーキノイズの抑制効果が薄く、６０容積斧以上とな
ると熱成形が困難になるからである。Furthermore, as a result of experiments, the total content of inorganic compounds with a layered crystal structure or hydroxides of aluminum, magnesium, iron, etc. contained in the end zone is between 2 and 60 volumes, preferably 3
~55 volume units, more preferably 4 to 50 volume units. This is because if the volume of these substances is less than 2, the effect of suppressing low frequency brake noise is weak, and if the volume is more than 60, thermoforming becomes difficult.
「作用」
本発明のバンドでは摩擦材の両端部帯域で研磨材の含有
量を少なくすることによって引きずりによるディスクロ
ータの偏摩耗を防止してシャダーが減少する、。−万両
端部帯域および中央部帯域の一部或いは全部に層状の結
晶構造を持つ無機化合物或いは金属の水酸化物等を含有
させると摩擦材のＲが下がるので制動時のスティックス
リップ現象を防止するので低周波のブレーキノイズの発
生をも防止できるものである。"Operation" In the band of the present invention, by reducing the content of abrasive material in both end zones of the friction material, uneven wear of the disc rotor due to drag is prevented and shudder is reduced. -If part or all of the end zones and the center zone contain an inorganic compound or metal hydroxide with a layered crystal structure, the R of the friction material will be lowered, thereby preventing the stick-slip phenomenon during braking. Therefore, the generation of low frequency brake noise can also be prevented.
「実施例」
ディスクブレーキ用摩擦材の評価をするために第１図に
示すようなパッドを造った。その場合に第３図に示すよ
うに両端ブレーキ帯域の幅を１５ｍｍとした。"Example" In order to evaluate a friction material for a disc brake, a pad as shown in FIG. 1 was made. In this case, as shown in FIG. 3, the width of the brake zones at both ends was set to 15 mm.
第１表に示す配合の材料をアイリッヒミキサーで混合し
、その各種の材料を第２表のように組み合わせて、中央
部帯域と端部帯域にそれぞれの材料を投入して熱成形し
た。熱成形は１６０°Ｃ１１０分間で行った。圧力は成
形した摩擦材の中央部帯域が計算上１０％の気孔率を有
するように適当な値を選んだ。成形後２３０’Ｃで３時
間加熱して硬化して摩擦材を得た。The materials having the compositions shown in Table 1 were mixed in an Eirich mixer, and the various materials were combined as shown in Table 2, and each material was placed in the center zone and end zones for thermoforming. Thermoforming was carried out at 160°C for 110 minutes. The pressure was selected at an appropriate value so that the central zone of the molded friction material had a calculated porosity of 10%. After molding, it was cured by heating at 230'C for 3 hours to obtain a friction material.
第１表 原料配合（％）
第２表 各帯域材質の組み合わせ
第２表に示す各試料を用いて車両の走行制動をシミュレ
ート可能なダイナモメータ−により、１０分毎に一回の
制動を加え、延べ１００時間後にディスクの厚みを測定
し最大摩耗点と最小摩耗点の差を測定した。次に前記の
テストに使用したディスクロータを実車に装着して通常
走行状態で制動を１０回繰り返してシャダーのレベルの
大小を調査した。その結果は第５表に示す通りであった
。Table 1 Raw material composition (%) Table 2 Combination of each band material Using each sample shown in Table 2, braking was applied once every 10 minutes using a dynamometer capable of simulating vehicle running braking. After a total of 100 hours, the thickness of the disk was measured and the difference between the maximum wear point and the minimum wear point was determined. Next, the disc rotor used in the above test was mounted on an actual vehicle, and braking was repeated 10 times under normal driving conditions to investigate the magnitude of the shudder level. The results were as shown in Table 5.
第３表 デ・スク°−タ摩耗と
実車でのシャダー
以上の結果から、端部帯域にＺｒＯ２のような研Ｎ１１
とスチールウールを含まない・ｆラド、実施例（１）、
比較例（１）の場合には摩耗差は小さく、実車ジャダは
生じないことがわかる。Table 3 Based on the results of de-scooter wear and shudder on an actual vehicle, grinding N11 such as ZrO2 was applied to the end zone.
and steel wool-free f-rad, Example (1),
It can be seen that in the case of Comparative Example (1), the difference in wear is small and no judder occurs in the actual vehicle.
次に実際の車両に装着してブレーキノイズ試験を行った
。その際のブレーキの制動スケジュールを第４表に示す
。Next, we installed it in an actual vehicle and conducted a brake noise test. The braking schedule at that time is shown in Table 4.
第４表 制動スケジュール （以下余白） その結果は第５表の通りであった。Table 4 Braking schedule (Margin below) The results were as shown in Table 5.
第５表 ブレーキノイズ試験結果
以上の結果から本発明のように両端部帯域に層状結晶構
造の無機化合物とアルミニウム等の水酸化物を含ませた
摩擦材を用いると低周波数のブレーキノイズの発生を防
止することができることが分かる。Table 5 Brake Noise Test Results From the above results, the use of a friction material containing an inorganic compound with a layered crystal structure and a hydroxide such as aluminum in both end zones as in the present invention reduces the occurrence of low frequency brake noise. It turns out that it can be prevented.
「発明の効果」
以上に詳しく説明したように、本発明のディスクブレー
キ用摩擦材はアスベストを含まないので人体、環境への
影響が問題になることがないことは勿論、シャダーは抑
えられ、さらにブレーキ制動時に発生する、低周波数の
ブレーキノイズを防止できて運転者等への不快感を解消
する効果を有するものであるっまた従来の摩擦材と同等
の耐フェード性、耐摩耗性を有することは勿論であるっ"Effects of the Invention" As explained in detail above, the friction material for disc brakes of the present invention does not contain asbestos, so it does not have any impact on the human body or the environment, and also suppresses shudder. It has the effect of preventing low-frequency brake noise that occurs during braking and eliminating discomfort for drivers, etc. It also has fade resistance and wear resistance equivalent to conventional friction materials. Of course
第１図は本発明の摩擦材（パッド）の正面図、第２図は
他の具体例の正面図である。第３図は実施例の摩擦材の
正面図、第４図は引きずり状態の摩擦材とディスクロー
タの状態を説明する模式図である。
ＩＩｍ！擦材、 ２ ディスクロータ、３−裏
金、 ４，７・中央部帯域、５．６．９．１０
端部帯域、
８ ・中央部帯域の一部、
Ａ・ディスクロータ回転方向
代理人 弁理士 １）中 理 夫FIG. 1 is a front view of the friction material (pad) of the present invention, and FIG. 2 is a front view of another specific example. FIG. 3 is a front view of the friction material of the embodiment, and FIG. 4 is a schematic diagram illustrating the state of the friction material and the disc rotor in a dragging state. IIm! Friction material, 2 disc rotor, 3-back metal, 4, 7, central band, 5.6.9.10
End band, 8. Part of central band, A. Disk rotor rotation direction agent Patent attorney 1) Rio Naka
Claims (1)
剤、研磨剤を結合剤を用いて熱成形したものを裏金に熱
硬化性樹脂接着剤によって接着したディスクブレーキ用
摩擦材において、摩擦材はディスクの回転方向にそって
中央部帯域と両端部帯域に分けて構成され、少なくとも
その摺動表面層での研磨剤の含有率が端部帯域において
中央部帯域の含有率に比し同等或いは小さく、且つ端部
帯域にはグラファイトおよび２硫化モリブデン以外のマ
イカ、タルク、バーミキュライト、カオリン等の層状の
結晶構造を持つ無機化合物、アルミニウム、マグネシウ
ム、鉄の水酸化物をフィラーとして少なくとも２種以上
含んでおり、中央部帯域には前記フィラーを含まないか
域いはその１種を含むようにしたことを特徴とするディ
スクブレーキ用摩擦材 ２、中央部帯域の一部をその残部に比し研磨剤の含有率
を同等或いは小さくし且つ２硫化モリブデン以外のマイ
カ、タルク、バーミキュライト、カオリン等の層状の結
晶構造を持つ無機化合物、アルミニウム、マグネシウム
、鉄の水酸化物をフィラーとして少なくとも２種以上含
んだ材質としたことを特徴とする請求項１記載のディス
クブレーキ用摩擦材[Claims] 1. For disc brakes, the base material is made of asbestos-free fibers and is thermoformed with fillers, lubricants, and abrasives using a binder and bonded to a backing metal with a thermosetting resin adhesive. In the friction material, the friction material is divided into a central zone and both end zones along the rotational direction of the disk, and at least the abrasive content in the sliding surface layer is higher than that in the central zone in the end zone. The filler is equal to or smaller than the ratio, and the end zone is filled with an inorganic compound with a layered crystal structure such as mica, talc, vermiculite, kaolin, etc. other than graphite and molybdenum disulfide, or hydroxides of aluminum, magnesium, and iron. Friction material 2 for a disc brake, characterized in that the central zone contains at least two or more fillers, and the central zone does not contain or contains one of the fillers. The content of abrasive is the same or lower than that of the rest, and fillers include inorganic compounds with a layered crystal structure such as mica, talc, vermiculite, and kaolin other than molybdenum disulfide, and hydroxides of aluminum, magnesium, and iron. The friction material for disc brakes according to claim 1, characterized in that the material is made of a material containing at least two or more types of
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23182390A JP2884745B2 (en) | 1990-09-01 | 1990-09-01 | Friction material for disc brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23182390A JP2884745B2 (en) | 1990-09-01 | 1990-09-01 | Friction material for disc brake |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04114084A true JPH04114084A (en) | 1992-04-15 |
| JP2884745B2 JP2884745B2 (en) | 1999-04-19 |
Family
ID=16929580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23182390A Expired - Fee Related JP2884745B2 (en) | 1990-09-01 | 1990-09-01 | Friction material for disc brake |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2884745B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002520560A (en) * | 1998-07-14 | 2002-07-09 | アライドシグナル・インコーポレイテッド | Polishing coating for brake pads |
| JP2008143937A (en) * | 2006-12-06 | 2008-06-26 | Akebono Brake Ind Co Ltd | Non-asbestos-based friction material |
| WO2012004844A1 (en) * | 2010-07-05 | 2012-01-12 | 三菱電機株式会社 | Brake lining and method for manufacturing same |
| JP2017141352A (en) * | 2016-02-10 | 2017-08-17 | 日立化成株式会社 | Friction material composition, friction material and friction member using the friction material composition |
-
1990
- 1990-09-01 JP JP23182390A patent/JP2884745B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002520560A (en) * | 1998-07-14 | 2002-07-09 | アライドシグナル・インコーポレイテッド | Polishing coating for brake pads |
| JP2008143937A (en) * | 2006-12-06 | 2008-06-26 | Akebono Brake Ind Co Ltd | Non-asbestos-based friction material |
| WO2012004844A1 (en) * | 2010-07-05 | 2012-01-12 | 三菱電機株式会社 | Brake lining and method for manufacturing same |
| JP5442120B2 (en) * | 2010-07-05 | 2014-03-12 | 三菱電機株式会社 | Brake lining |
| JP2017141352A (en) * | 2016-02-10 | 2017-08-17 | 日立化成株式会社 | Friction material composition, friction material and friction member using the friction material composition |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2884745B2 (en) | 1999-04-19 |
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