JPS5811950Y2 - disc brake - Google Patents
disc brakeInfo
- Publication number
- JPS5811950Y2 JPS5811950Y2 JP1976069743U JP6974376U JPS5811950Y2 JP S5811950 Y2 JPS5811950 Y2 JP S5811950Y2 JP 1976069743 U JP1976069743 U JP 1976069743U JP 6974376 U JP6974376 U JP 6974376U JP S5811950 Y2 JPS5811950 Y2 JP S5811950Y2
- Authority
- JP
- Japan
- Prior art keywords
- eccentric cam
- annular
- dust boot
- lip
- disc brake
- 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
Links
Landscapes
- Sealing Devices (AREA)
- Braking Arrangements (AREA)
Description
【考案の詳細な説明】
本考案は、ブレーキレバーの回転運動をシリンダ軸心方
向に変換する偏心カムを用いた、機械式作動子を有する
型式のディスクブレーキに関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a type of disc brake that has a mechanical actuator and uses an eccentric cam that converts the rotational movement of a brake lever in the direction of the cylinder axis.
前記型式のディスクブレーキにおいては、前記偏心カム
と該偏心カムを収容し且つ前記シリンダ軸心と直交する
段付穴の開口部口元とによって形成される隙間から塵埃
や水が浸入してしまうという問題があった。In the above-mentioned type of disc brake, there is a problem that dust and water enter through the gap formed by the eccentric cam and the opening of the stepped hole that houses the eccentric cam and is orthogonal to the cylinder axis. was there.
いま前記型式のテ゛イスクブレーキの一例を図面の第１
図にしたがって簡単に説明すると、１は車体等に固定し
て取付けられるシリンダであり、該シリンダ１と摺動自
在にヨーク２が設けられている。An example of the above-mentioned type of disc brake is shown in Fig. 1 of the drawing.
To explain briefly according to the drawings, 1 is a cylinder fixedly attached to a vehicle body, etc., and a yoke 2 is provided to be slidable on the cylinder 1.
シリンダ１内にはアウターピストン３とインナーピスト
ン４とがシリンダ１に対して摺動自在に嵌合している。In the cylinder 1, an outer piston 3 and an inner piston 4 are fitted to be slidable relative to the cylinder 1.
アウターピストン３内にはアジャスタ５が固着して設け
られ、該アジャスタ５にはブツシュロッド６の一端ねじ
部が螺合している。An adjuster 5 is fixedly provided within the outer piston 3, and one end threaded portion of a bushing rod 6 is screwed into the adjuster 5.
そしてブツシュロッド６の他端は、インナーピストン４
内に形成されたシリンダ７内に摺動自在に嵌合している
。The other end of the bushing rod 6 is connected to the inner piston 4.
It is slidably fitted into a cylinder 7 formed therein.
前記シリンダ７の上部には段付穴８が設けられ、該段付
穴８内には偏心カム９が軸受１０を介して回動自在に収
容されている。A stepped hole 8 is provided in the upper part of the cylinder 7, and an eccentric cam 9 is rotatably accommodated in the stepped hole 8 via a bearing 10.
そして押し棒１１が、前記偏心カム９に設けられた切欠
きと前記ブツシュロッド６の図中上端に設けられた窪み
との間にまたがって嵌入している。A push rod 11 is fitted across a notch provided in the eccentric cam 9 and a recess provided at the upper end of the bushing rod 6 in the drawing.
なお図中１２ａ、１２ｂは夫々制動パッドである。Note that 12a and 12b in the figure are brake pads, respectively.
前記偏心カム９を、該偏心カム９に取付けられたブレー
キレバー（第２図、第３図において番号１３で示す）に
よって反時計方向に回転させると、前記制動パッド１２
ａ 、１２ ｂがディスク（図示せず）を圧着し、ブ
レーキがかけられた状態となるものである。When the eccentric cam 9 is rotated counterclockwise by a brake lever (indicated by number 13 in FIGS. 2 and 3) attached to the eccentric cam 9, the brake pad 12
a, 12b press against a disc (not shown), and the brake is applied.
ところで前述のように段付穴８と偏心カム９との隙間に
塵埃や水が入りこむのを防止するため、従来第２図に示
すような、段付穴８の開口部口元８ａの近傍に段付部８
ｂを設け、該段付部８ｂ内にＯリング１４を介挿し、該
Ｏリングの抜は止めとしてブレーキレバー１３とＯリン
グ１４との間にスペサ１５を介することが提案されてい
る。By the way, as mentioned above, in order to prevent dust and water from entering the gap between the stepped hole 8 and the eccentric cam 9, a step is conventionally provided near the opening mouth 8a of the stepped hole 8 as shown in FIG. Attached part 8
It has been proposed that an O-ring 14 be inserted into the stepped portion 8b, and that a spacer 15 be interposed between the brake lever 13 and the O-ring 14 to prevent the O-ring from coming off.
しかし、このものにあってはＯリング１４による摩擦が
大きいため偏心カム９の回転抵抗が大きくなるという問
題があった。However, this device has a problem in that the friction caused by the O-ring 14 is large, so that the rotational resistance of the eccentric cam 9 becomes large.
又従来、第６図に示すような、段付穴８の段付部８ｂ内
に、鋼板製の環状体キャップ１６が、その縁１６ａを外
周方向に折り曲げられ且つ縁１６ ａを前記開口部口元
８ａと離間させて嵌入され、そして偏心カム９に設けら
れた段付部９ｂの外周には、環状体のゴム製のダストブ
ーツ１７の一端環状部１７ａが密着し、ダストブーツ１
７の他端環状部１７ｂは、前記開口部口元８ａと縁１６
ａとの間に密嵌されたダストブーツで塵埃や水の浸入
を防ぐことが提案されている。Conventionally, as shown in FIG. 6, an annular cap 16 made of a steel plate is placed in the stepped portion 8b of the stepped hole 8, with its edge 16a bent in the outer circumferential direction, and the edge 16a is bent toward the mouth of the opening. An annular portion 17a at one end of an annular rubber dust boot 17 is in close contact with the outer periphery of a stepped portion 9b provided on the eccentric cam 9, which is fitted in a spaced manner from the dust boot 8a.
The other end annular portion 17b of 7 is connected to the opening mouth 8a and the edge 16.
It has been proposed to prevent dust and water from entering with a dust boot tightly fitted between a.
しかし、ダストブーツ１７の連結ゴム１７ Ｃは薄肉と
されているため、度重なるブレーキレバー１３の操作、
すなわち偏心カム９の回動に伴う連結ゴム１７ Ｃのね
じれにより切損し易く、その耐久性、つまり切損後はも
はや塵埃や水の侵入に対して無力となるという問題を有
していた。However, since the connecting rubber 17C of the dust boot 17 is thin, repeated operations of the brake lever 13,
That is, the connection rubber 17C is easily broken due to twisting caused by the rotation of the eccentric cam 9, and there is a problem in its durability, that is, after the breakage, it becomes powerless against the intrusion of dust and water.
本考案の目的は以上のような問題点を解決すべく、偏心
カム９の回転抵抗が殆んどなく、又前述の隙間から塵埃
や水が入りこむのを完全に防ぐことができ、しかも耐久
性のあるディスクブレーキを提供することにある。The purpose of the present invention is to solve the above-mentioned problems, so that there is almost no rotational resistance of the eccentric cam 9, it can completely prevent dust and water from entering through the above-mentioned gap, and it has high durability. Our goal is to provide disc brakes with
以下に本考案の実施例を図面にしたがって説明する。Embodiments of the present invention will be described below with reference to the drawings.
第１実施例（第３図）
前記段付穴８内に、ブレーキレバー１３を取付けた偏心
カム９が軸受１０を介して収容されている点は従来のも
のと同じである。First Embodiment (FIG. 3) This embodiment is the same as the conventional one in that an eccentric cam 9 to which a brake lever 13 is attached is housed in the stepped hole 8 via a bearing 10.
段付穴８の段付部８ｂ内には、鋼板製の環状体キャップ
１６が、その縁１６ ａを外周方向に折り曲げられ且つ
縁１６ ａを前記開口部口元８ａと離間させて嵌入され
ている。A ring-shaped cap 16 made of a steel plate is fitted into the stepped portion 8b of the stepped hole 8, with its edge 16a bent in the outer circumferential direction and with the edge 16a spaced from the opening mouth 8a. .
そして偏心カム９に設けられた段付部９ｂの外周には、
環状体であるゴム製のダストブーツ１７の一端環状部１
７ａが密着し、ダストブーツ１７の他端環状部１７ｂは
、前記開口部口元８ａと前記縁１６ａとの間に密嵌され
ている。On the outer periphery of the stepped portion 9b provided on the eccentric cam 9,
Annular portion 1 at one end of a rubber dust boot 17 which is an annular body
7a are in close contact with each other, and the other end annular portion 17b of the dust boot 17 is tightly fitted between the opening mouth 8a and the edge 16a.
又ダストブーツ１７の一端環状部１７ ａと他端環状部
１７ ｂとは、薄肉環状体の連結ゴム１７ Ｃによって
前記隙間を覆うように連結されている。Further, one end annular portion 17a and the other end annular portion 17b of the dust boot 17 are connected by a thin annular connecting rubber 17C so as to cover the gap.
さらにダストブーツ１７の一端環状部１７ ａからは、
ダストブーツ１７と一体的に形成されたリップ１７ｄが
伸び、該リップ１７ｄの先端は前記キャップ１６の内周
部と密接している。Furthermore, from the annular portion 17a at one end of the dust boot 17,
A lip 17d integrally formed with the dust boot 17 extends, and the tip of the lip 17d is in close contact with the inner circumference of the cap 16.
第２実施例（第４図）
前記実施例と同一の機能を有する部材には同一の符号を
付して、その説明を省略し、第１実施例との相違を以下
に述べる。Second Embodiment (FIG. 4) The same reference numerals are given to members having the same functions as in the previous embodiment, and the explanation thereof will be omitted, and the differences from the first embodiment will be described below.
まづ、偏心カム９に設けられた段付部９ｂの外周に、環
状体であるゴム製のダストブーツ１７の一端環状部１７
ａが密着している点は第１実施例と同じであるが、段
付穴８の段付部８ｂにはその周方向に凹溝８ｂが設けら
れており、該凹溝８ｂに、ダストブーツ１７の他端環状
部１７ｂに設けられた凸条が密嵌されている。First, on the outer periphery of the stepped portion 9b provided on the eccentric cam 9, there is an annular portion 17 at one end of a rubber dust boot 17, which is an annular body.
The point that a is in close contact is the same as in the first embodiment, but the stepped portion 8b of the stepped hole 8 is provided with a groove 8b in the circumferential direction, and the dust boot is inserted into the groove 8b. A protrusion provided on the annular portion 17b at the other end of the ring 17 is tightly fitted.
そして、ダストブーツ１７の一端環状部１７ ａからは
、ダストブーツ１７と一体的に形成されたリップ１７ｄ
が伸び、該リップ１７ｄの先端は前記ダストブーツ１７
の他端環状部１７ ｂの内周部と密接している。A lip 17d integrally formed with the dust boot 17 extends from the annular portion 17a at one end of the dust boot 17.
extends, and the tip of the lip 17d is connected to the dust boot 17.
The other end is in close contact with the inner peripheral portion of the annular portion 17b.
第３実施例（第５図）
この実施例のものにあっては、ダストブーツ１７の他端
環状部１７ｂからダストブーツ１７と一体的に形成され
たリップ１７ｄが伸び、該リップ１７ｄの先端は前記ダ
ストブーツ１７の一端環状部１７ Ｈの内周部と密接し
ている点を除いてその余は前記の第２実施例と同じであ
る。Third Embodiment (FIG. 5) In this embodiment, a lip 17d integrally formed with the dust boot 17 extends from the annular portion 17b at the other end of the dust boot 17, and the tip of the lip 17d is The rest is the same as the second embodiment except that one end of the dust boot 17 is in close contact with the inner circumference of the annular portion 17H.
以上のように本考案におけるディスクブレーキは、偏心
カム９と、該偏心カム９を収容する穴８の開口部口元８
ａとの隙間を、リップ１７ ｄと連結ゴム１７ Ｃとで
内外二重に閉塞したので、前記隙間からの塵埃や水の浸
入を完全に防ぐことができる。As described above, the disc brake according to the present invention includes the eccentric cam 9 and the opening mouth 8 of the hole 8 that accommodates the eccentric cam 9.
Since the gap between the opening and the opening is double-closed by the lip 17d and the connecting rubber 17C, it is possible to completely prevent dust and water from entering through the gap.
又連結ゴム１７ Ｃ及びリップ１７ｄのどちらが一方が
切損しても、残りの部分が前記隙間を閉塞しているので
この間の液体、ゴミなどの浸入がなくその耐久性も非常
に優れている。Furthermore, even if either the connecting rubber 17C or the lip 17d is broken, the remaining portion closes the gap, so that no liquid, dirt, etc. can enter during this time, and the durability is very high.
さらにダストブーツがゴム等の弾性体で作られているた
め、ブレーキレバーの操作つまり偏心カムの回動に対し
て、連結ゴムのねじれによって追従し、またリップ先端
は弾性体のたわみにより接触していることがら、圧縮し
て嵌入するＯリングに比べ偏心カム９の回転抵抗も小さ
くすることができる。Furthermore, since the dust boot is made of an elastic material such as rubber, the operation of the brake lever, that is, the rotation of the eccentric cam, is followed by the twisting of the connecting rubber, and the tip of the lip is brought into contact with the bending of the elastic material. Therefore, the rotational resistance of the eccentric cam 9 can also be reduced compared to an O-ring that is compressed and fitted.
第１図は本考案の適用対象となるテ゛イスクブレーキの
一例の断面図、第２図は第１図のｘ−ｘ’線における従
来のテ゛イスクブレーキの断面図、第３図は第１図のｘ
−ｘ’線における本考案の第１実施例の断面図、第４図
は第１図のｘ−ｘ’線における本考案の第２実施例の断
面図、第５図は第１図のｘ−ｘ’線における本考案の第
３実施例の断面図、第６図は第１図のｘ−ｘ’線におけ
る従来のダストブーツを用いたテ゛イスクブレーキの断
面図である。
４・・・・・・インナーピストン、８ａ・・・・・・開
口部口元、９・・・・・・偏心カム、１３・・・・・・
ブレーキレバー、１７・・・・・・ダストブーツ、１７
Ｃ・・・・・・連結ゴム、１７ｄ・・・・・・リップ。Fig. 1 is a sectional view of an example of a disc brake to which the present invention is applied, Fig. 2 is a sectional view of a conventional disc brake taken along line x-x' in Fig. 1, and Fig. 3 is a sectional view of an example of a disc brake to which the present invention is applied.
4 is a sectional view of the second embodiment of the present invention taken along the line x-x' in FIG. 1, and FIG. 6 is a cross-sectional view of the third embodiment of the present invention taken along the line -x', and FIG. 6 is a cross-sectional view of a conventional disk brake using a dust boot taken along the line xx' of FIG. 4...Inner piston, 8a...Opening mouth, 9...Eccentric cam, 13...
Brake lever, 17... Dust boot, 17
C...Connection rubber, 17d...Lip.
Claims (1)
する偏心カムを用いた機械式作動子を有し、−縮環状部
を前記偏心カムの外周に、他端環状部を前記偏心カムを
収容する穴の開口部口元外周にそれぞれ密着させると共
に、前記周環状部間を環状体の弾性体で連結させたダス
トブーツを設けたディスクブレーキにおいて、ダストブ
ーツの前記いずれか一方の環状部の端部に環状のリップ
を設け、該リップにより前記開口部を閉塞したことを特
徴とするディスクブレーキ。It has a mechanical actuator using an eccentric cam that converts the rotational movement of the brake lever into a movement in the cylinder axis direction, - a condensed annular part is on the outer periphery of the eccentric cam, and the other end annular part accommodates the eccentric cam. In a disc brake provided with a dust boot that is in close contact with the outer periphery of the opening of the hole and in which the circumferential annular portions are connected by an elastic body of the annular body, an end portion of one of the annular portions of the dust boot is provided. A disc brake characterized in that an annular lip is provided, and the opening is closed by the lip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1976069743U JPS5811950Y2 (en) | 1976-05-31 | 1976-05-31 | disc brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1976069743U JPS5811950Y2 (en) | 1976-05-31 | 1976-05-31 | disc brake |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS52160776U JPS52160776U (en) | 1977-12-06 |
| JPS5811950Y2 true JPS5811950Y2 (en) | 1983-03-07 |
Family
ID=28538608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1976069743U Expired JPS5811950Y2 (en) | 1976-05-31 | 1976-05-31 | disc brake |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5811950Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6111544Y2 (en) * | 1980-05-17 | 1986-04-11 | ||
| JPS5988536U (en) * | 1982-12-06 | 1984-06-15 | 曙ブレーキ工業株式会社 | Parking lever support part sealing structure of disc brake |
-
1976
- 1976-05-31 JP JP1976069743U patent/JPS5811950Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS52160776U (en) | 1977-12-06 |
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