JPH09301256A - Roller brake for vehicle - Google Patents
Roller brake for vehicleInfo
- Publication number
- JPH09301256A JPH09301256A JP8140926A JP14092696A JPH09301256A JP H09301256 A JPH09301256 A JP H09301256A JP 8140926 A JP8140926 A JP 8140926A JP 14092696 A JP14092696 A JP 14092696A JP H09301256 A JPH09301256 A JP H09301256A
- Authority
- JP
- Japan
- Prior art keywords
- brake
- friction material
- weight
- less
- vehicle
- 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
- Braking Arrangements (AREA)
- Powder Metallurgy (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】この発明は車両用ブレーキに
関し、特に自転車用等に用いられるローラーブレーキに
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle brake, and more particularly to a roller brake used for bicycles and the like.
【0002】[0002]
【従来の技術】自転車等に用いられるブレーキとして、
ローラーブレーキが知られている。しかしドラムおよび
シューはともに溶製鉄鋼材料よりなり、摩擦係数が比較
的低い。すなわちブレーキの効きが低いという問題点が
あった。また焼き付き防止のために、グリースを充填し
ているが、このグリースの粘度が気温により変化するた
めに、摩擦係数や走行時の回転抵抗が気温により変化す
るという問題点があった。またグリースは、劣化した
り、減少したりするので、補充する必要があった。2. Description of the Related Art As a brake for a bicycle,
Roller brakes are known. However, both the drum and the shoe are made of molten steel material and have a relatively low coefficient of friction. That is, there is a problem that the braking effect is low. Further, although grease is filled to prevent seizure, there is a problem in that the friction coefficient and the rotational resistance during running change with temperature because the viscosity of this grease changes with temperature. Further, the grease deteriorates or decreases, so it was necessary to replenish it.
【0003】[0003]
【発明が解決しようとする課題】このようなことから、
本発明では、現状ローラーブレーキの効きを高め、気温
による効きの変化を小さくし、さらにメンテナンスフリ
ーを実現することを目的とする。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In the present invention, it is an object of the present invention to enhance the effectiveness of the current roller brake, reduce the effect change due to the temperature, and realize maintenance-free operation.
【0004】[0004]
【課題を解決するための手段】本発明者等は、ローラー
ブレーキを構成するドラムおよびブレーキシューの間に
焼結摩擦材が配置されることにより、前記問題点を解決
できることを見出した。すなわち、前記焼結摩擦材はC
uやFeを主成分とする摩擦材を使用することにより、
摩擦係数が高くなり、その結果ブレーキの効きを高める
ことが判った。また摩擦材の成分や気孔率、油の含浸有
無により、使用用途にあった摩擦係数に変えることがで
き、ブレーキの鳴きは気孔率を高めることにより非常に
小さくできた。The present inventors have found that the above-mentioned problems can be solved by disposing a sintered friction material between a drum and a brake shoe that constitute a roller brake. That is, the sintered friction material is C
By using a friction material containing u or Fe as the main component,
It has been found that the coefficient of friction is increased, and as a result, the effectiveness of the brake is increased. In addition, the friction coefficient can be changed according to the intended use depending on the composition of the friction material, the porosity, and the presence or absence of oil impregnation, and the squeal of the brake can be made extremely small by increasing the porosity.
【0005】またグリースや油を部品の隙間に充填する
のではなく、摩擦材中に含浸するので、毛細管現象によ
り必要な時に摩擦材の中からグリースや油が浸み出て、
必要以上の量はまた摩擦材内に吸収される。このため摺
動面には極少量の油やグリースしかないために、粘度の
影響を受けにくく、また油やグリース等が系外へ出て減
少する心配もないので、補給する必要もない。Further, since the grease or oil is not filled in the gaps between the parts but is impregnated in the friction material, the grease or oil seeps out from the friction material when necessary due to the capillary phenomenon.
Excessive amounts are also absorbed in the friction material. Therefore, since the sliding surface has only a very small amount of oil or grease, it is unlikely to be affected by the viscosity, and there is no concern that the oil, grease, etc. will come out of the system and decrease, so that there is no need to replenish.
【0006】[0006]
【作用】本発明の車両用ローラーブレーキは、ドラムと
シューの間に焼結摩擦材が配置されていることから、ブ
レーキの効きが高く、しかも安定化しており、さらに耐
焼き付き性にも優れる作用をするものである。The roller brake for a vehicle according to the present invention has the sintered friction material disposed between the drum and the shoe, so that the braking effect is high and stable, and the seizure resistance is excellent. Is what you do.
【0007】また焼結摩擦材としては、Cu系あるいは
Fe系で、Sn,Zn,Al,Fe(Cu系のみ)、C
u(Fe系のみ)、Co,Ni,Mn,Si,Cr,
P,BがFeやCuを主成分とするマトリックスの強度
を上げる作用をし、黒鉛,MoS2,WS2,Pb,S
b,Bi,Agが摩擦係数を安定化させ、耐摩耗性およ
び耐焼き付き性を向上させる作用をなす。また焼結摩擦
材の気孔は摩擦係数を上げ、ブレーキ鳴きを低減する作
用がある。さらに気孔に含まれた油やグリースはブレー
キ鳴きの低減、摩擦係数の安定化や耐焼き付き性に効果
がある。The sintered friction material is Cu-based or Fe-based, and includes Sn, Zn, Al, Fe (only Cu-based), and C.
u (Fe system only), Co, Ni, Mn, Si, Cr,
P and B act to increase the strength of the matrix containing Fe or Cu as the main component, and graphite, MoS 2 , WS 2 , Pb, S
b, Bi, and Ag serve to stabilize the friction coefficient and improve wear resistance and seizure resistance. In addition, the pores of the sintered friction material increase the friction coefficient and reduce brake squeal. Furthermore, the oil and grease contained in the pores are effective in reducing brake squeal, stabilizing the friction coefficient, and seizure resistance.
【0008】[0008]
【発明の実施の態様】以下、本発明車両用ローラーブレ
ーキについて、自転車に適用した一実施例について、図
を参照ながら説明する。BEST MODE FOR CARRYING OUT THE INVENTION One embodiment of a roller brake for a vehicle according to the present invention applied to a bicycle will be described below with reference to the drawings.
【0009】図1は、ドラム1の内面に焼結摩擦材2が
ブレーキシュー3によって押し付けられた制動状態が示
されている。そして、この制動動作は、操作ワイヤ4を
P1方向に移動させれば、カム5がP2方向に回転するこ
とにより得られる。すなわち、カム5がP2方向に回動
すれば、ローラー6がブレーキシュー3を押圧すること
になり、ブレーキシュー3が焼結摩擦材2を介してドラ
ム1の内面に押しつけられる。また、前記ブレーキシュ
ー3は、ブレーキアーム7に設けられたシューストッパ
(図示せず)により回転が阻止されている。FIG. 1 shows a braking state in which the sintered friction material 2 is pressed against the inner surface of the drum 1 by a brake shoe 3. This braking operation is obtained by moving the operation wire 4 in the P 1 direction and rotating the cam 5 in the P 2 direction. That is, when the cam 5 rotates in the P 2 direction, the roller 6 presses the brake shoe 3, and the brake shoe 3 is pressed against the inner surface of the drum 1 via the sintered friction material 2. The brake shoe 3 is prevented from rotating by a shoe stopper (not shown) provided on the brake arm 7.
【0010】したがって、ドラム1は、ブレーキシュー
3との間に配置された焼結摩擦材2の摩擦力により回転
が抑制される。Therefore, rotation of the drum 1 is suppressed by the frictional force of the sintered friction material 2 arranged between the drum 1 and the brake shoe 3.
【0011】このようにして構成された焼結摩擦材2
は、図2〜図4に示されているようにリング状、C字状
および3分割のリング状に構成される。そしてこの焼結
摩擦材の組成は、CuあるいはFeを主成分とし、これ
を強化する元素としてSn,Zn,Al,Fe(Cu系
のみ)、Cu(Fe系のみ)、Co,Ni,Mn,S
i,Cr,P,Bを含有し、焼き付き防止、摩擦係数の
安定化、耐摩耗性の向上の目的で、黒鉛,MoS2,W
S2,Pb,Sb,Bi,Agを含有する。またさらに
摩擦係数を高め、ブレーキ鳴きを低減するために適度な
気孔を有するとさらに望ましい。また焼き付き防止、鳴
きの低減等を目的として、その気孔に油を含浸すること
も有効である。また焼結摩擦材の形状としては薄肉のリ
ングを基本とし、これをドラムに圧入したり、リングを
切断して填め込んだり、リングを分割して填め込んでも
よい。The sintered friction material 2 thus constructed
Are configured in a ring shape, a C shape, and a three-part ring shape as shown in FIGS. The composition of this sintered friction material contains Cu or Fe as a main component, and Sn, Zn, Al, Fe (only Cu-based), Cu (only Fe-based), Co, Ni, Mn, and S
Containing i, Cr, P, and B, graphite, MoS 2 , W for the purpose of preventing seizure, stabilizing the friction coefficient, and improving wear resistance.
It contains S 2 , Pb, Sb, Bi and Ag. Further, it is more desirable to have appropriate pores in order to further increase the friction coefficient and reduce the brake squeal. It is also effective to impregnate the pores with oil for the purpose of preventing seizure and reducing squeal. The shape of the sintered friction material is basically a thin ring, which may be press-fitted into the drum, cut into the ring to fit it, or the ring may be split into pieces.
【0012】主成分としてのCuやFeは摩擦材自身の
材料強度を保持する成分で、必要な材料強度を保持し、
焼き付き、摩擦係数を考慮して、30重量%以上91重
量%以下とした。30重量%未満であると必要な材料強
度が得られず、91重量%を越えると、耐焼き付き性が
悪化し、摩擦係数も低く、不安定となる。Cu and Fe as main components are components that retain the material strength of the friction material itself, and retain the necessary material strength.
Considering seizure and the coefficient of friction, the amount was set to 30% by weight or more and 91% by weight or less. If it is less than 30% by weight, the required material strength cannot be obtained, and if it exceeds 91% by weight, seizure resistance is deteriorated and the friction coefficient is low, resulting in instability.
【0013】Sn,Zn,Al,Fe(Cu系のみ)、
Cu(Fe系のみ)、Co,Niは、CuあるいはFe
を強化する元素で、1種または2種以上3重量%以上4
0重量%以下とした。3重量%未満であると強化効果が
小さく、40重量%を越えると、逆に強度が低下した
り、原料価格が高くなったりするので,前記範囲とし
た。Sn, Zn, Al, Fe (only Cu system),
Cu (Fe system only), Co, Ni are Cu or Fe
It is an element that strengthens 1 or 2 or more 3 wt% or more 4
It was set to 0% by weight or less. If it is less than 3% by weight, the strengthening effect is small, and if it exceeds 40% by weight, on the contrary, the strength is lowered and the raw material price is increased.
【0014】Mn,Si,Cr,P,Bは、Cuあるい
はFeを強化する元素で、1種または2種以上を1重量
%以上10重量%以下とした。1重量%未満では強化効
果が小さく、10重量%を越えると、逆に強度が低下す
る。Mn, Si, Cr, P and B are elements for strengthening Cu or Fe, and one kind or two or more kinds are set to 1% by weight or more and 10% by weight or less. If it is less than 1% by weight, the strengthening effect is small, and if it exceeds 10% by weight, the strength is decreased.
【0015】黒鉛,MoS2,WS2,Pb,Sb,B
i,Agは摩擦係数の安定、耐摩耗性の向上、耐焼き付
き性の向上等に効果があり、1種または2種以上を2重
量%以上20重量%以下とした。2重量%未満では、そ
の効果が小さく、20重量%を越えると、逆に摩耗量が
多くなったり、強度が低下するので、前記範囲とした。Graphite, MoS 2 , WS 2 , Pb, Sb, B
i and Ag are effective in stabilizing the friction coefficient, improving abrasion resistance, and improving seizure resistance, and the like, and 1 or 2 or more of them are 2% by weight or more and 20% by weight or less. If it is less than 2% by weight, the effect is small, and if it exceeds 20% by weight, on the contrary, the amount of wear increases or the strength decreases, so the above range was made.
【0016】気孔率を変化させることにより,焼結摩擦
材2の弾性、硬さ、振動減衰性を制御すること、すなわ
ち摩擦係数、ブレーキ鳴きの大きさを制御することがで
きる。最適な気孔率は材料組成、使用用途によって変化
するが、本件の用途においては5%以上30%以下とし
た。5%未満であると、摩擦係数が小さい、ブレーキ鳴
きの発生等の問題があり、30%を越えると,材料強度
が低下するという問題があり、前記範囲とした。By changing the porosity, the elasticity, hardness and vibration damping of the sintered friction material 2 can be controlled, that is, the friction coefficient and the squeal of the brake can be controlled. The optimum porosity varies depending on the material composition and intended use, but in the present application, it is set to 5% or more and 30% or less. When it is less than 5%, there are problems such as a small friction coefficient and occurrence of brake squeal, and when it exceeds 30%, there is a problem that the material strength decreases, so the above range was set.
【0017】焼結摩擦材2の気孔に油を含浸するとブレ
ーキ鳴きの低減や摩擦係数の安定化、耐焼き付き性の向
上に有効である。グリースや油を部品の隙間に充填する
場合は、使用中に流れ出たりして、補給する必要があっ
たが、本発明の車両用ローラーブレーキは焼結摩擦材2
中に油やグリースを含浸しているので、使用中に流れ出
る心配もなく、メンテナンスフリーが可能である。Impregnating the pores of the sintered friction material 2 with oil is effective for reducing brake squeal, stabilizing the friction coefficient and improving seizure resistance. When the grease or oil was filled in the gaps between the parts, it was necessary to replenish it by flowing out during use, but the roller brake for a vehicle of the present invention uses the sintered friction material 2
Since it is impregnated with oil or grease inside, there is no worry of spilling during use, and maintenance-free is possible.
【0018】[0018]
【実施例】表1は、本発明車両用ローラーブレーキにつ
いて、焼結摩擦材2の組成を示したものである。ただし
材料−5、6は比較例である。これに対し、表2は、実
車試験の結果を示したもので、摩擦材形状および組成の
組合せにより本発明品と比較品に分けたものである。な
お、実車試験は、約10度勾配の未舗装路約1000m
中で20回制動を行い、ブレーキの効力、鳴きについ
て、3段階(良、普、悪)の評価をしたものである。ま
た、試験後ドラム、シュー、摩擦材をそれぞれ取り出
し、耐焼き付き性についても3段階の評価を行った。EXAMPLES Table 1 shows the composition of the sintered friction material 2 in the vehicle roller brake of the present invention. However, materials-5 and 6 are comparative examples. On the other hand, Table 2 shows the results of the actual vehicle test, which are classified into the product of the present invention and the comparative product according to the combination of the shape and composition of the friction material. In addition, the actual vehicle test is about 1000 m on unpaved road with a gradient of about 10 degrees.
Braking was performed 20 times, and the effectiveness and squeal of the brake were evaluated in three grades (good, ordinary, and bad). Further, after the test, the drum, the shoe, and the friction material were taken out, and the seizure resistance was evaluated in three stages.
【0019】[0019]
【表1】 [Table 1]
【0020】[0020]
【表2】 [Table 2]
【0021】[0021]
【発明の効果】本発明は、表2の実車試験結果に示す通
り、ブレーキの効力が高くなり、効きの安定性、耐焼き
付き性も向上し、鳴きも低減される。According to the present invention, as shown in the results of the actual vehicle test in Table 2, the effectiveness of the brake is enhanced, the stability of the effectiveness and the seizure resistance are improved, and the squeal is reduced.
【図1】本発明車両用ローラーブレーキの一実施例を示
す要部の断面図、FIG. 1 is a sectional view of an essential part showing an embodiment of a roller brake for a vehicle of the present invention,
【図2】本発明に用いられる焼結摩擦材の形状例を示す
正面図、FIG. 2 is a front view showing an example of the shape of a sintered friction material used in the present invention,
【図3】同じく焼結摩擦材の他の形状例を示す正面図、FIG. 3 is a front view showing another example of the shape of the sintered friction material,
【図4】さらに、焼結摩擦材の別の形状例を示す正面
図、FIG. 4 is a front view showing another example of the shape of the sintered friction material,
1 ドラム 2 焼結摩擦材 3 ブレーキシュー 1 Drum 2 Sintered friction material 3 Brake shoe
Claims (4)
るブレーキシューの外面間には、焼結摩擦材が組込まれ
るようにした車両用ローラーブレーキにおいて、 前記焼結摩擦材は、その組成がCuを30重量%以上9
1重量%以下、Sn,Zn,Al,Fe,Co,Niの
1種または2種以上を3重量%以上40重量%以下、M
n,Si,Cr,P,Bの1種または2種以上を1重量
%以上10重量%以下、黒鉛,MoS2,WS2,Pb,
Sb,Bi,Agの1種または2種以上を2重量%以上
20重量%以下、を含むことを特徴とする車両用ローラ
ーブレーキ。1. A roller brake for a vehicle, wherein a sintered friction material is incorporated between an inner surface of an iron drum and an outer surface of a brake shoe having a braking function, wherein the composition of the sintered friction material is Cu. 30% by weight or more 9
1 wt% or less, one or two or more of Sn, Zn, Al, Fe, Co, Ni and 3 wt% or more and 40 wt% or less, M
One or two or more of n, Si, Cr, P and B, 1 wt% or more and 10 wt% or less, graphite, MoS 2 , WS 2 , Pb,
A roller brake for a vehicle, comprising one or more of Sb, Bi and Ag in an amount of 2% by weight or more and 20% by weight or less.
0重量%以上91重量%以下のCuに代えてFeが選択
され、3重量%以上40%重量%以下のFeを除いてい
る請求項1記載の車両用ローラーブレーキ。2. The sintered friction material according to claim 1 is 3
The roller brake for vehicles according to claim 1, wherein Fe is selected in place of Cu of 0% by weight or more and 91% by weight or less, and Fe of 3% by weight or more and 40% by weight or less is excluded.
の気孔率が5%以上30%以下である請求項1および請
求項2記載の車両用ローラーブレーキ。3. The roller brake for vehicles according to claim 1 or 2, wherein the sintered friction material according to claim 1 has a porosity of 5% or more and 30% or less.
内には、油やグリースが含まれている請求項1〜請求項
3記載の車両用ローラーブレーキ。4. The roller brake for a vehicle according to claim 1, wherein oil and grease are contained in the pores of the sintered friction material according to claim 3.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8140926A JPH09301256A (en) | 1996-05-09 | 1996-05-09 | Roller brake for vehicle |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8140926A JPH09301256A (en) | 1996-05-09 | 1996-05-09 | Roller brake for vehicle |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH09301256A true JPH09301256A (en) | 1997-11-25 |
Family
ID=15280035
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8140926A Pending JPH09301256A (en) | 1996-05-09 | 1996-05-09 | Roller brake for vehicle |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH09301256A (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001192754A (en) * | 1999-11-01 | 2001-07-17 | Mitsubishi Materials Corp | BEARING MADE OF GRAPHITE DISPERSION TYPE Cu BASE SINTERED ALLOY OF MOTOR TYPE FUEL PUMP EXHIBITING EXCELLENT WEAR RESISTANCE UNDER HIGH PRESSURE-HIGH SPEED CIRCULATION OF CASOLINE AND MOTOR TYPE FUEL PUMP USING SAME |
JP2002285265A (en) * | 2001-03-28 | 2002-10-03 | Mitsubishi Materials Corp | Bearing made of copper based sintered alloy of motor type fuel pump and motor type fuel pump incorporated with the bearing |
JP2002285266A (en) * | 2001-03-28 | 2002-10-03 | Mitsubishi Materials Corp | Bearing made of copper based sintered alloy of motor type fuel pump and motor type fuel pump incorporated with the bearing |
GB2394230A (en) * | 2002-10-15 | 2004-04-21 | Daido Metal Co | Copper alloy containing bismuth |
JP2007197834A (en) * | 2007-02-19 | 2007-08-09 | Komatsu Ltd | Composite sintered slide member |
EP1842936A1 (en) * | 2006-04-07 | 2007-10-10 | Tungaloy Corporation | Frictional material |
WO2009089402A3 (en) * | 2008-01-09 | 2009-10-08 | Federal-Mogul Corporation | Porous sliding bearing and method of construction thereof |
WO2014157089A1 (en) * | 2013-03-25 | 2014-10-02 | 新日鐵住金株式会社 | Copper alloy powder, sintered copper alloy body and brake lining for use in high-speed railway |
CN109570492A (en) * | 2019-02-20 | 2019-04-05 | 中机锻压江苏股份有限公司 | A kind of metallurgical powder formula |
CN112831685A (en) * | 2020-12-31 | 2021-05-25 | 博深股份有限公司 | Motor train unit brake pad friction material and preparation method thereof |
CN113234954A (en) * | 2021-04-30 | 2021-08-10 | 中铁隆昌铁路器材有限公司 | Copper-based powder metallurgy friction material and preparation method thereof |
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