JPH08270688A - Waterproofing device for drum brake - Google Patents

Waterproofing device for drum brake

Info

Publication number
JPH08270688A
JPH08270688A JP7106595A JP7106595A JPH08270688A JP H08270688 A JPH08270688 A JP H08270688A JP 7106595 A JP7106595 A JP 7106595A JP 7106595 A JP7106595 A JP 7106595A JP H08270688 A JPH08270688 A JP H08270688A
Authority
JP
Japan
Prior art keywords
drum
annular groove
tip
back plate
outer edge
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
Application number
JP7106595A
Other languages
Japanese (ja)
Inventor
Fujio Koketsu
富士夫 纐纈
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suzuki Motor Corp
Original Assignee
Suzuki Motor Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Suzuki Motor Corp filed Critical Suzuki Motor Corp
Priority to JP7106595A priority Critical patent/JPH08270688A/en
Publication of JPH08270688A publication Critical patent/JPH08270688A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D51/00Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like
    • F16D2051/001Parts or details of drum brakes
    • F16D2051/005Protective covers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D51/00Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like

Landscapes

  • Braking Arrangements (AREA)

Abstract

PURPOSE: To rapidly discharge quantities of muddy water to the outside even when the muddy water enters a flange part and to prevent entrance of muddy water to a drum. CONSTITUTION: Formation of the waterproofing device of a drum brake is such that a back plate 4 is disposed on the opening side of a drum 1 and an annular groove 3 positioned facing the back plate 4 is formed in the opening end 2 of the drum 1, and a surrounding part 5 is formed at the tip of the back plate 4 at a given distance from the opening end 2 of the drum 1. An inner edge 3b in which the annular groove 3 is formed is formed in a short length, a hook-form flange part 6 bent along the outer edge 3a of the annular groove 3 is formed across the tip of the inner edge 3b at the inner side of the surrounding part 5, and a peripheral groove 7 comprises the surrounding part 5 and a flange part 6.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は車両のドラムブレーキの
防水装置に関し、詳しくはドラムの開口端とバックプレ
ートとの隙間からの泥水等の浸入を防止する構造に関す
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof device for a vehicle drum brake, and more particularly to a structure for preventing muddy water or the like from entering through a gap between an open end of a drum and a back plate.

【0002】[0002]

【従来の技術】ドラムブレーキのドラムの開口側には、
ブレーキシューおよびこれを駆動するホイルシリンダ等
を配設するバックプレートが配設されている。バックプ
レートはドラムの開口端に対して間隔をもって配設され
ているので、この隙間から泥水等がドラム内に浸入する
ことがあった。従来のドラムブレーキは、図5に示すよ
うに、ドラム101の開口端102に環状溝103を形
成し、バックプレート104の先端には開口端102に
対し所定の間隔をもって覆う包囲部105が形成されて
いた。包囲部105の内壁には、環状溝103に挿入さ
れる筒状のフランジ部106が形成されており、包囲部
105の先端105aと環状溝103の外縁103a,
外縁103aとフランジ部106および内縁103bと
フランジ部106とによってラビリンスを形成し、ドラ
ム101内への泥水等の浸入を防止していた。
2. Description of the Related Art On the opening side of a drum of a drum brake,
A back plate is provided on which a brake shoe and a wheel cylinder that drives the brake shoe are disposed. Since the back plate is arranged with a gap from the opening end of the drum, muddy water or the like may enter the drum through this gap. In the conventional drum brake, as shown in FIG. 5, an annular groove 103 is formed at the opening end 102 of the drum 101, and an enclosing portion 105 is formed at the tip of the back plate 104 to cover the opening end 102 at a predetermined interval. Was there. A cylindrical flange portion 106 that is inserted into the annular groove 103 is formed on the inner wall of the surrounding portion 105, and the tip 105a of the surrounding portion 105 and the outer edge 103a of the annular groove 103 are formed.
A labyrinth is formed by the outer edge 103a and the flange portion 106 and the inner edge 103b and the flange portion 106 to prevent infiltration of muddy water or the like into the drum 101.

【0003】[0003]

【発明が解決しようとする課題】しかしながら、包囲部
105の先端105aと環状溝103の外縁103aと
の隙間から泥水が多量に浸入すると、浸入した泥水がフ
ランジ部106を伝わって外縁103aとフランジ部1
06の間に導かれてしまい、ここからドラム101内に
浸入してしまうことがあった。したがって、本発明の目
的は、多量の泥水がフランジ部に浸入しても速やかに外
部に排出でき、ドラム内への泥水の浸入を防止したドラ
ムブレーキの防水装置を提供することにある。
However, when a large amount of muddy water enters through the gap between the tip 105a of the surrounding portion 105 and the outer edge 103a of the annular groove 103, the infiltrated muddy water travels through the flange portion 106 and the outer edge 103a and the flange portion. 1
There was a case where it was guided during 06 and penetrated into the drum 101 from here. Therefore, it is an object of the present invention to provide a waterproof device for a drum brake, which can promptly discharge a large amount of muddy water to the outside even if the muddy water enters the flange portion and prevents the muddy water from entering the drum.

【0004】[0004]

【課題を解決するための手段】上記課題を解決するため
に、請求項1記載の発明では、ドラムの開口側にバック
プレートを配設し、該ドラムの開口端に該バックプレー
トに対向する環状溝を形成し、該バックプレートの先端
に前記ドラムの開口端に対し所定の間隔をもって覆う包
囲部を形成したドラムブレーキの防水装置において、前
記環状溝を形成する内縁を短く形成し、前記包囲部の内
側に該内縁の先端を横切って該環状溝の外縁に沿って曲
折された鈎状のフランジ部を形成すると共に前記包囲部
と該フランジ部により周溝を形成したことを特徴とす
る。
In order to solve the above-mentioned problems, in the invention according to claim 1, a back plate is disposed on the opening side of the drum, and an annular shape facing the back plate at the opening end of the drum. In a waterproof device for a drum brake, wherein a groove is formed and a surrounding portion is formed at a front end of the back plate so as to cover the opening end of the drum at a predetermined interval, the inner edge forming the annular groove is formed short, and the surrounding portion is A hook-shaped flange portion that is bent along the outer edge of the annular groove across the tip of the inner edge, and a peripheral groove is formed by the surrounding portion and the flange portion.

【0005】請求項2記載の発明では、請求項1記載の
ドラムブレーキの防水装置において、前記フランジ部の
曲折された先端を前記外縁の先端より環状溝側に配置し
たことを特徴とする。
According to a second aspect of the present invention, in the waterproof device for a drum brake according to the first aspect, the bent tip of the flange portion is arranged closer to the annular groove than the tip of the outer edge.

【0006】[0006]

【作用】請求項1記載のドラムブレーキの防水装置にお
いては、包囲部の先端と環状溝の外縁との隙間から浸入
した泥水は、包囲部とフランジ部により形成された周溝
内に導かれ、この周溝を伝わって下方に流れて下部より
外部に排出される。請求項2記載のドラムブレーキの防
水装置においては、フランジ部の曲折面が環状溝の外縁
より外側に露出してないので、包囲部の先端と環状溝の
外縁との隙間から浸入した泥水は、フランジ部の曲折面
の外周に伝わることなく周溝内に導かれ、防水効果が向
上する。
In the waterproof device for a drum brake according to the first aspect, the muddy water that has entered through the gap between the tip of the surrounding portion and the outer edge of the annular groove is guided into the circumferential groove formed by the surrounding portion and the flange portion, It flows down this peripheral groove, flows downward, and is discharged to the outside from the lower part. In the waterproof device for a drum brake according to claim 2, since the bent surface of the flange portion is not exposed to the outside of the outer edge of the annular groove, the muddy water entering from the gap between the tip of the surrounding portion and the outer edge of the annular groove is It is guided into the circumferential groove without being transmitted to the outer circumference of the bent surface of the flange portion, and the waterproof effect is improved.

【0007】[0007]

【実施例】以下、図1乃至図4の図面に基づいて、本発
明の各実施例を説明する。図1はドラムブレーキの一例
を示す図であり、1はブレーキのドラムであり、アクス
ルシャフト8に連結されるホイールハブ9に固着され、
ホイール10の内側に配設されている。アクスルシャフ
ト8の外郭にはアクスルハウジング11が配設されてお
り、車体12にサスペンション13を介して懸架されて
いる。アクスルハウジング11の両端にはホイールベア
リング14のハウジング15が連結され、ハウジング1
5にはドラム1の開口側を覆う円盤状のバックプレート
4が配設されている。ドラム1には、図2,図3に示す
ように、周面の開口端2に環状溝3が形成されており、
環状溝3はドラム1の開口側に開口している。また、環
状溝3は同心上の外縁3aと内縁3bにより形成され、
内縁3bは外縁3aよりも短く形成されている。バック
プレート4は、円盤状に形成されており、先端には断面
コ字状に成形された包囲部5が形成されている。包囲部
5の先端5aはドラム1の外縁3aに沿って延出されて
筒状に成形され、開口端2の外縁3a,内縁3bに対し
て所定の間隔をもって覆うように配設されている。ドラ
ム1の開口端2と包囲部5の間には、フランジ部6が配
設されている。フランジ部6は、断面鈎状に曲折された
輪状の板材により構成され、包囲部5の内側でバックプ
レート4の内壁に固着されている。フランジ部6は、ド
ラム1の内縁3bの先端を所定の間隔をもって横切り、
外縁3aの手前で所定の間隔をもって曲折され、外縁3
aに沿って外縁3aの先端まで延出された曲折面6aを
形成している。また、バックプレート4の先端には、包
囲部5内壁とこのフランジ部6の外壁により周溝7が形
成されている。
Embodiments of the present invention will be described below with reference to the drawings of FIGS. FIG. 1 is a view showing an example of a drum brake, and 1 is a drum of the brake, which is fixed to a wheel hub 9 connected to an axle shaft 8,
It is arranged inside the wheel 10. An axle housing 11 is arranged outside the axle shaft 8 and is suspended from a vehicle body 12 via a suspension 13. The housing 15 of the wheel bearing 14 is connected to both ends of the axle housing 11, and the housing 1
A disk-shaped back plate 4 that covers the opening side of the drum 1 is arranged at 5. As shown in FIGS. 2 and 3, the drum 1 has an annular groove 3 formed at the open end 2 of the peripheral surface thereof.
The annular groove 3 opens on the opening side of the drum 1. Further, the annular groove 3 is formed by a concentric outer edge 3a and an inner edge 3b,
The inner edge 3b is formed shorter than the outer edge 3a. The back plate 4 is formed in a disk shape, and an enclosing portion 5 having a U-shaped cross section is formed at the tip thereof. The tip 5a of the surrounding portion 5 extends along the outer edge 3a of the drum 1 and is formed into a tubular shape, and is disposed so as to cover the outer edge 3a and the inner edge 3b of the opening end 2 with a predetermined interval. A flange portion 6 is arranged between the open end 2 of the drum 1 and the surrounding portion 5. The flange portion 6 is formed of a ring-shaped plate material bent in a hook shape in cross section, and is fixed to the inner wall of the back plate 4 inside the surrounding portion 5. The flange portion 6 traverses the tip of the inner edge 3b of the drum 1 at a predetermined interval,
The outer edge 3a is bent at a predetermined interval before the outer edge 3a.
A bent surface 6a is formed so as to extend along the edge a to the tip of the outer edge 3a. A peripheral groove 7 is formed at the tip of the back plate 4 by the inner wall of the surrounding portion 5 and the outer wall of the flange portion 6.

【0008】この実施例のドラムブレーキの防水装置で
は、走行中タイヤにはね上げられた泥水は、包囲部5の
先端5aと環状溝3の外縁3aとの隙間から包囲部5内
に浸入すると、包囲部5の内壁を環状に伝わって下方に
流れる、あるいは、多量に浸入した場合には、包囲部5
とフランジ部6により形成された周溝7に導かれ、この
周溝7を伝わって下方に流れる。この際、フランジ部6
の曲折面6aが環状溝3の外縁3aより外側に露出して
ないので、浸入した泥水は曲折面6aの外周に伝わるこ
とがなく、外縁3aとフランジ部6の隙間からドラム1
内への泥水の浸入が防止できる。包囲部5の内壁あるい
は、周溝7を伝わって下方に流れた泥水は、バックプレ
ート4の下端に位置する環状溝3の外縁3aとの隙間か
ら外部に速やかに排出される。なお、ホイール10の水
没等によりドラム1内に泥水が浸入しても、ホイール1
0が水面から脱出した際には、ドラム1内の泥水は速や
かに外部に排出される。すなわち、フランジ部6の曲折
面6aと環状溝3の外縁3aとが同じく開口側に向かっ
て形成されているので、フランジ部6の壁面に溜まるこ
となく、ドラム1の内壁を伝わって外部に排出される。
In the drum brake waterproof device of this embodiment, when the muddy water splashed up on the running tire enters the surrounding portion 5 through the gap between the tip 5a of the surrounding portion 5 and the outer edge 3a of the annular groove 3, the surrounding water is surrounded. In the case where the inner wall of the portion 5 flows in an annular shape and flows downward, or if a large amount of water enters, the enclosure portion
And is guided to the peripheral groove 7 formed by the flange portion 6, and flows downward along the peripheral groove 7. At this time, the flange portion 6
Since the bent surface 6a of the ring groove 3 is not exposed to the outside of the outer edge 3a of the annular groove 3, the invading muddy water does not reach the outer circumference of the bent surface 6a, and the drum 1 passes through the gap between the outer edge 3a and the flange portion 6.
It can prevent the infiltration of muddy water. The muddy water that has flowed downward along the inner wall of the surrounding portion 5 or the circumferential groove 7 is quickly discharged to the outside from the gap between the outer edge 3a of the annular groove 3 located at the lower end of the back plate 4. Even if muddy water enters the drum 1 due to the submersion of the wheel 10 or the like, the wheel 1
When 0 escapes from the water surface, the muddy water in the drum 1 is promptly discharged to the outside. That is, since the bent surface 6a of the flange portion 6 and the outer edge 3a of the annular groove 3 are similarly formed toward the opening side, they do not accumulate on the wall surface of the flange portion 6 and are transmitted to the outside through the inner wall of the drum 1. To be done.

【0009】つぎに、図4に示す他の実施例について説
明する。この実施例において、ドラム1の構造は、図1
乃至図3の実施例と同じである。フランジ部6は、バッ
クプレート4の先端に一体に形成されており、ドラム1
の内縁3bの先端を所定の間隔をもって横切り、外縁3
aの手前で所定の間隔をもって曲折され、外縁3aに沿
って外縁3aの先端まで延出された曲折面6aを形成し
ている。包囲部5は、バックプレート4とは別体で構成
され、輪状の板材を断面コ字状に成形してなり、バック
プレート4の先端の外壁に、ドラム1の開口端の外縁3
aおよびフランジ部6の曲折面6aに対して所定の間隔
をもって覆うように固着されている。また、バックプレ
ート4の先端には、包囲部5内壁とこのフランジ部6の
外壁により周溝7が形成されている。なお、この実施例
においても、前記実施例と同様な作用が得られる。
Next, another embodiment shown in FIG. 4 will be described. In this embodiment, the structure of the drum 1 is as shown in FIG.
3 to the embodiment shown in FIG. The flange portion 6 is formed integrally with the tip of the back plate 4 and
The tip of the inner edge 3b of the
A curved surface 6a is formed in front of a at a predetermined interval and extends along the outer edge 3a to the tip of the outer edge 3a. The surrounding portion 5 is configured separately from the back plate 4, and is formed by molding a ring-shaped plate material in a U-shaped cross section.
a and the bent surface 6a of the flange portion 6 are fixed so as to cover the curved surface 6a at a predetermined interval. A peripheral groove 7 is formed at the tip of the back plate 4 by the inner wall of the surrounding portion 5 and the outer wall of the flange portion 6. Incidentally, also in this embodiment, the same operation as that of the above embodiment can be obtained.

【0010】以上、図示実施例について説明したが、本
発明は上記形態にのみ限定されるものではなく、各構成
要素の形状等に種々の変更を加えることが可能である。
Although the illustrated embodiment has been described above, the present invention is not limited to the above embodiment, and various changes can be made to the shape of each component.

【0011】[0011]

【発明の効果】上記の説明から明らかなように、本発明
のドラムブレーキの防水装置は、包囲部とフランジ部に
より包囲部内に周溝を形成したので、包囲部の先端と環
状溝の外縁との隙間から浸入した泥水は周溝内に導か
れ、この周溝を伝わって速やかに下方に流れ防水効果が
向上するという効果を奏する。また、フランジ部の曲折
面が環状溝の外縁より外側に露出してないので、包囲部
の先端と環状溝の外縁との隙間から浸入した泥水は、フ
ランジ部の曲折面の外周に伝わることなく周溝内に導か
れ、さらに防水効果が向上するという効果を奏する。
As is apparent from the above description, in the waterproof device for a drum brake of the present invention, since the peripheral groove is formed in the surrounding portion by the surrounding portion and the flange portion, the tip of the surrounding portion and the outer edge of the annular groove are formed. The muddy water that has entered through the gap is guided into the circumferential groove, and flows through the circumferential groove to quickly flow downward so that the waterproof effect is improved. Also, since the bent surface of the flange is not exposed outside the outer edge of the annular groove, muddy water that has entered through the gap between the tip of the surrounding section and the outer edge of the annular groove does not reach the outer circumference of the bent surface of the flange. It is guided into the circumferential groove, and the waterproof effect is further improved.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明のドラムブレーキを示す構成図である。FIG. 1 is a configuration diagram showing a drum brake of the present invention.

【図2】本発明の要部を示す切欠斜視図である。FIG. 2 is a cutaway perspective view showing a main part of the present invention.

【図3】図2の切断部を示す断面図である。FIG. 3 is a cross-sectional view showing a cut portion of FIG.

【図4】本発明の他の実施例を示す図3と同様な断面図
である。
FIG. 4 is a sectional view similar to FIG. 3, showing another embodiment of the present invention.

【図5】従来のドラムブレーキ示す図3と同様な断面図
である。
FIG. 5 is a sectional view similar to FIG. 3, showing a conventional drum brake.

【符号の説明】[Explanation of symbols]

1 ブレーキのドラム 2 ドラムの開口端 3 環状溝 3a 外縁 3b 内縁 4 バックプレート 5 包囲部 6 フランジ部 7 周溝 1 Brake drum 2 Open end of drum 3 Annular groove 3a Outer edge 3b Inner edge 4 Back plate 5 Enclosing portion 6 Flange portion 7 Circumferential groove

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 ドラムの開口側にバックプレートを配設
し、該ドラムの開口端に該バックプレートに対向する環
状溝を形成し、該バックプレートの先端に前記ドラムの
開口端に対し所定の間隔をもって覆う包囲部を形成した
ドラムブレーキの防水装置において、前記環状溝を形成
する内縁を短く形成し、前記包囲部の内側に該内縁の先
端を横切って該環状溝の外縁に沿って曲折された鈎状の
フランジ部を形成すると共に前記包囲部と該フランジ部
により周溝を形成したことを特徴とするドラムブレーキ
の防水装置。
1. A back plate is disposed on the opening side of the drum, an annular groove facing the back plate is formed at the opening end of the drum, and a predetermined distance is provided at the tip of the back plate with respect to the opening end of the drum. In a waterproof device for a drum brake having an enclosing portion formed with a space, the inner edge forming the annular groove is formed short, and the inner edge of the enclosing portion is bent along the outer edge of the annular groove across the tip of the inner edge. A drum brake waterproofing device, characterized in that a hook-shaped flange portion is formed and a circumferential groove is formed by the surrounding portion and the flange portion.
【請求項2】 前記フランジ部の曲折された先端を前記
外縁の先端より環状溝側に配置したことを特徴とする請
求項1に記載のドラムブレーキの防水装置。
2. The waterproof device for a drum brake according to claim 1, wherein the bent tip of the flange portion is arranged closer to the annular groove than the tip of the outer edge.
JP7106595A 1995-03-29 1995-03-29 Waterproofing device for drum brake Pending JPH08270688A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7106595A JPH08270688A (en) 1995-03-29 1995-03-29 Waterproofing device for drum brake

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7106595A JPH08270688A (en) 1995-03-29 1995-03-29 Waterproofing device for drum brake

Publications (1)

Publication Number Publication Date
JPH08270688A true JPH08270688A (en) 1996-10-15

Family

ID=13449762

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7106595A Pending JPH08270688A (en) 1995-03-29 1995-03-29 Waterproofing device for drum brake

Country Status (1)

Country Link
JP (1) JPH08270688A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999027269A1 (en) * 1997-11-22 1999-06-03 Continental Teves Ag & Co. Ohg Motor vehicle braking device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999027269A1 (en) * 1997-11-22 1999-06-03 Continental Teves Ag & Co. Ohg Motor vehicle braking device
US6296086B1 (en) 1997-11-22 2001-10-02 Continental Teves Ag & Co., Ohg Motor vehicle braking device

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