JPH01190568A - Cooling device for drum brake - Google Patents

Cooling device for drum brake

Info

Publication number
JPH01190568A
JPH01190568A JP1488288A JP1488288A JPH01190568A JP H01190568 A JPH01190568 A JP H01190568A JP 1488288 A JP1488288 A JP 1488288A JP 1488288 A JP1488288 A JP 1488288A JP H01190568 A JPH01190568 A JP H01190568A
Authority
JP
Japan
Prior art keywords
brake
drum
brake drum
air
cooling fins
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
JP1488288A
Other languages
Japanese (ja)
Inventor
Tadashi Ihara
井原　忠
Katsumi Tsukada
塚田　勝己
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.)
NEC Corp
NEC Information Service Co Ltd
Original Assignee
NEC Corp
NEC Information Service Co Ltd
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 NEC Corp, NEC Information Service Co Ltd filed Critical NEC Corp
Priority to JP1488288A priority Critical patent/JPH01190568A/en
Publication of JPH01190568A publication Critical patent/JPH01190568A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D2065/13—Parts or details of discs or drums
    • F16D2065/1304—Structure
    • F16D2065/1332—Structure external ribs, e.g. for cooling or reinforcement

Abstract

PURPOSE:To improve cooling efficiency of a brake drum by providing air-cooling fins on the outer periphery of a drum brake, and disposing a fan in the vicinity of the brake drum on an axle, which is rotated with the axle to let air flow to the air cooling fin side of the brake drum. CONSTITUTION:Air cooling fins 1 are radially fitted to the outer periphery surface of a brake drum 4 in order to enlarge the surface area of the outer peripheral surface of the drum brake 4, and a fan 2 is radially fixed to a portion of an axle 3 in the vicinity of the brake drum 4. At the time of braking, frictional heat generated by sliding contact between the inner surface of the brake drum 4 and a brake shoe is transmitted to the cooling fins 1 and accompanied by an air flow A sent to the air cooling fins 1 by the fan 2 to lower the temperature of the cooling fins 1, that is, the brake drum 4. Thus, the occurrence of fade phenomenon due to overheating of the brake drum 4 is avoided.

Description

【発明の詳細な説明】 ［産業上の利用分野］ 本発明はドラムブレーキに関し、特にブレーキドラムと
ブレーキシューとの摩擦による熱を発散させ、加熱によ
るフェード現象を防止するための冷却装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a drum brake, and more particularly to a cooling device for dissipating heat caused by friction between a brake drum and brake shoes and preventing a fade phenomenon caused by heating.

［従来の技術］ 車両用のブレーキ装置には種々のものがあるが、ドラム
ブレーキが数多く採用されていることは周知のところで
ある。[Prior Art] There are various brake devices for vehicles, and it is well known that drum brakes are widely used.

［発明が解決しようとする問題点］ 従来のドラムブレーキは、長い下り坂を走行する時等に
、ブレーキペダルを踏み込む回数が多くなり、ブレーキ
ドラムとブレーキシューを長時間接触させて走行すると
ブレーキドラムとブレーキシューの間に大きな摩擦熱が
発生し、ブレーキドラムが過熱していわゆるフェード現
象が起こり、制動力が失われてしなうことがあるという
欠点があった。[Problems to be solved by the invention] With conventional drum brakes, when driving down a long slope, the brake pedal has to be depressed many times, and if the brake drum and brake shoes are in contact with each other for a long period of time, the brake drum may become damaged. The drawback was that a large amount of frictional heat was generated between the brake drum and the brake shoes, causing the brake drum to overheat and cause a so-called fade phenomenon, resulting in a loss of braking force.

［問題点を解決するための手段］ 本発明は、ブレーキドラムの近傍に強制的な冷却装置を
設けてブレーキドラムに生じる摩擦熱を奪い、ブレーキ
ドラムの過熱によるフェード現象の発生を未然に防止せ
んとするものである。[Means for Solving the Problems] The present invention provides a forced cooling device near the brake drum to remove the frictional heat generated in the brake drum, thereby preventing the occurrence of a fade phenomenon due to overheating of the brake drum. That is.

具体的には、本発明に係るドラムブレーキの冷却装置は
、プレー午ドラムの外周に空冷フィンを設けると共に、
車軸のブレーキドラム近傍に該車軸と共に回転して、上
記ブレーキドラムの空冷フィン側へ空気を流すファンを
設けたことを特徴とするもので、ドラムブレーキのブレ
ーキドラムの外側に空冷エンジンと同じ様な空冷フィン
を設け、且つ車軸にもブレーキドラムの外側に付けられ
た空冷フィンに空気を流すファンを設けたものである。Specifically, the drum brake cooling device according to the present invention provides air cooling fins on the outer periphery of the brake drum, and
It is characterized by having a fan installed near the brake drum of the axle that rotates with the axle and flows air toward the air-cooling fin side of the brake drum. Air cooling fins are provided, and a fan is also provided on the axle to flow air through the air cooling fins attached to the outside of the brake drum.

［作用］ 本発明によれば、ブレーキシューの摩擦熱は、車軸に付
けたファンから流れてきた空気によってブレーキドラム
の外側の空冷フィンへと運ばれ、更に車両の進行に伴っ
て、その空気と一緒に後方へ流れてしまう、このためド
ラムの温度はフェード現象が起こらない程度の低い状態
に保たれる。[Function] According to the present invention, the frictional heat of the brake shoes is carried by the air flowing from the fan attached to the axle to the air cooling fins on the outside of the brake drum, and is further transferred to the air as the vehicle moves forward. They flow backwards together, keeping the temperature of the drum low enough to prevent fade.

［実施例］ 次に、本発明の実施例について図面を参照して説明する
。[Example] Next, an example of the present invention will be described with reference to the drawings.

第１図は本発明のドラムブレーキの冷却装置の一実施例
であり、第２図は第１図の実施例の部分断面側面図、第
３図は同じく第１図の実施例の正面図である。Fig. 1 shows an embodiment of the drum brake cooling device of the present invention, Fig. 2 is a partially sectional side view of the embodiment shown in Fig. 1, and Fig. 3 is a front view of the embodiment shown in Fig. 1. be.

第１図において、４はブレーキドラムであり、１はブレ
ーキドラム４の外周面の表面積を広げるため、外周面に
対して放射状に取付けた空冷フィンである。また２は、
車軸３のドラム４近傍にこれも放射状に取付けたファン
である。なお、図中５はタイヤホール、６はタイヤであ
る。In FIG. 1, 4 is a brake drum, and 1 is an air cooling fin attached radially to the outer circumferential surface of the brake drum 4 in order to increase the surface area of the outer circumferential surface. Also, 2 is
This fan is also installed radially near the drum 4 of the axle 3. In addition, in the figure, 5 is a tire hole, and 6 is a tire.

次に本実施例における摩擦熱の放散状態を説明する。Next, the state of dissipation of frictional heat in this embodiment will be explained.

制動時にブレーキドラム４の内面とブレーキシューとの
摺接によって発生する摩擦熱は、空冷フィンｌへ伝導さ
れ、ファン３により空冷フィン１へ流されてくる空気流
Ａと一緒に走行方向後方に流れる（空気流Ｂ）、このた
め、ブレーキドラム４の温度が下がり、フェード現象は
起こりにくくなる。Frictional heat generated by sliding contact between the inner surface of the brake drum 4 and the brake shoes during braking is conducted to the air cooling fins 1, and flows rearward in the running direction together with the air flow A that is directed to the air cooling fins 1 by the fan 3. (Air flow B), therefore, the temperature of the brake drum 4 decreases, and the fade phenomenon becomes less likely to occur.

［発明の効果］ 以上説明したように本発明に係るドラムブレーキの冷却
装置は、ドラムブレーキにおいて、ブレーキドラムの外
周に空冷フィンを設けると共に、車軸のブレーキドラム
近傍に該車軸と共に回転して、上記ブレーキドラムの空
冷フィン側へ空気を流すファンを設けたことを特徴とす
るもので、ドラムブレーキのブレーキドラムの外側に空
冷エンジンと同じ様な空冷フィンを設け、且つ車軸にも
ブレーキドラムの外側に付けられた空冷フィンに空気を
流すファンを設けることにより、ブレーキドラムとブレ
ーキシューの摩擦熱をブレーキドラムの外側の空冷フィ
ンへ車軸に付けたファンから流れてきた空気と一緒に後
方へ流してしまい、ドラムの温度を下げ、フェード現象
が起こらないようにすることができるという効果があ[Effects of the Invention] As explained above, the drum brake cooling device according to the present invention provides air cooling fins on the outer periphery of the brake drum in a drum brake, and rotates with the axle near the brake drum of the axle. It is characterized by a fan that blows air toward the air-cooling fin side of the brake drum.Air-cooling fins similar to those of air-cooled engines are provided on the outside of the brake drum of a drum brake, and there are also air-cooling fins on the outside of the brake drum on the axle. By installing a fan that flows air through the attached air cooling fins, the frictional heat between the brake drum and brake shoes is flowed backwards to the air cooling fins on the outside of the brake drum along with the air flowing from the fan attached to the axle. This has the effect of lowering the temperature of the drum and preventing fade phenomena.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の一実施例の斜視図、第２図は同部分断
面側面図、第３図は同正面図である。 １：空冷フィン ２：ファン ３：車軸 ４ニブレーキドラム ５：ホイール ６：タイヤFIG. 1 is a perspective view of one embodiment of the present invention, FIG. 2 is a partially sectional side view of the same, and FIG. 3 is a front view of the same. 1: Air cooling fins 2: Fan 3: Axle 4 Brake drum 5: Wheel 6: Tire

Claims (1)

【特許請求の範囲】 ドラムブレーキにおいて、 ブレーキドラムの外周に空冷フィンを設けると共に、 車軸のブレーキドラム近傍に該車軸と共に回転して上記
ブレーキドラムの空冷フィン側へ空気を流すファンを設
けたことを特徴とするドラムブレーキの冷却装置。[Claims] In a drum brake, air cooling fins are provided on the outer periphery of the brake drum, and a fan is provided near the brake drum of the axle to rotate with the axle and flow air toward the air cooling fin side of the brake drum. Features a drum brake cooling system.
JP1488288A 1988-01-26 1988-01-26 Cooling device for drum brake Pending JPH01190568A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1488288A JPH01190568A (en) 1988-01-26 1988-01-26 Cooling device for drum brake

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1488288A JPH01190568A (en) 1988-01-26 1988-01-26 Cooling device for drum brake

Publications (1)

Publication Number Publication Date
JPH01190568A true JPH01190568A (en) 1989-07-31

Family

ID=11873381

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1488288A Pending JPH01190568A (en) 1988-01-26 1988-01-26 Cooling device for drum brake

Country Status (1)

Country Link
JP (1) JPH01190568A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6698557B2 (en) * 2001-09-10 2004-03-02 Arvinmeritor Technology, Llc Brake drum cooling apparatus
CN116588046A (en) * 2023-07-18 2023-08-15 中国重汽集团济南动力有限公司 Axle wheel end structure capable of realizing active ventilation and cooling, axle and vehicle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6698557B2 (en) * 2001-09-10 2004-03-02 Arvinmeritor Technology, Llc Brake drum cooling apparatus
CN116588046A (en) * 2023-07-18 2023-08-15 中国重汽集团济南动力有限公司 Axle wheel end structure capable of realizing active ventilation and cooling, axle and vehicle

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