JPS622028A - Piston having heat insulating construction - Google Patents

Piston having heat insulating construction

Info

Publication number
JPS622028A
JPS622028A JP60140751A JP14075185A JPS622028A JP S622028 A JPS622028 A JP S622028A JP 60140751 A JP60140751 A JP 60140751A JP 14075185 A JP14075185 A JP 14075185A JP S622028 A JPS622028 A JP S622028A
Authority
JP
Japan
Prior art keywords
piston
heat insulating
plastic
clip
opening end
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
JP60140751A
Other languages
Japanese (ja)
Inventor
Akira Imamura
今村　顕
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.)
Akebono Research and Development Centre Ltd
Original Assignee
Akebono Research and Development Centre 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 Akebono Research and Development Centre Ltd filed Critical Akebono Research and Development Centre Ltd
Priority to JP60140751A priority Critical patent/JPS622028A/en
Publication of JPS622028A publication Critical patent/JPS622028A/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
    • F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
    • 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
    • F16D65/78—Features relating to cooling
    • F16D2065/785—Heat insulation or reflection
    • 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
    • F16D2125/00—Components of actuators
    • F16D2125/02—Fluid-pressure mechanisms
    • F16D2125/06—Pistons

Abstract

PURPOSE:To prevent a thermal crack of a piston by using a heat insulating board for the end part at which a plastic disk-brake piston is brought into contact with the back metal of a pad. CONSTITUTION:A circular heat insulating board 5 is embedded and fitted into the opening end 2 of a plastic piston body 1. And, an SVS clip 6 having a disk part sufficient to cover the heat insulating board 5 on the peripheral part of which claws are projected at an equal interval in the circumferential direction, is installed on the opening end 2 to prevent the board 5 from coming off. The claws of the clip 6 are engaged with the fitting groove 3 of a piston seal between the piston body 1 and the opening end 2.

Description

【発明の詳細な説明】 本発明はプラスチックピストンを使用したディスクブレ
ーキにおいて、該プラスチックピストンの間口端、すな
わちパッド裏金と接触する部分が高温にさらされてクラ
ックが発生するのを防止するようにしたディスクブレー
キピストンに関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention is a disc brake using a plastic piston, which prevents the front end of the plastic piston, that is, the part that contacts the pad back metal, from being exposed to high temperatures and causing cracks. It relates to disc brake pistons.

近年自動車用ディスクブレーキにおいては軽量化の要求
から、熱硬化性樹脂をマトリックスとしたプラスチック
ピストンが多く使用されるようになったが、ブレーキ作
動時にピストン開口端が高温状態の摩擦パッドの裏金に
直接接触するため、パッドｗ金が４００℃以上の高温に
達すると、プラスチックピストンの先端部にクラックが
発生するという問題が生じてくる。In recent years, plastic pistons with a thermosetting resin matrix have come to be used more and more in automotive disc brakes due to the demand for weight reduction. Due to contact, when the pad w gold reaches a high temperature of 400° C. or higher, a problem arises in that cracks occur at the tip of the plastic piston.

本発明はこの問題を解消するためになされたもので、パ
ッド裏金と接触する先端部分を断熱板とすることによっ
て、＊ｔｑパッドからピストン開口端への熱伝導を和ら
げ、プラスチックピストン先端部の熱クラツクを防止し
て、初期の目的を収めたものである。The present invention was made to solve this problem, and by making the tip part that contacts the pad back metal a heat insulating plate, the heat conduction from the *tq pad to the open end of the piston is moderated, and the heat at the tip of the plastic piston is reduced. It prevents cracks and fulfills the initial purpose.

本発明の実施に用いられる断熱板としては例えばβスポ
ジュメン系結晶化ガラス（Ｌｌ。Examples of the heat insulating board used in the practice of the present invention include β-spodumene crystallized glass (Ll).

Ｎａ　）　Ａｆ　（Ｓｉ　０３　）がある。また窒化ケ
イ素３ｉ　３　Ｎ４　、炭化ケイ素（カーボランダム）
Ｓｉ　Ｃ，ジルコニアＺｒ０ｚなどの粉末のセラミック
ス焼結体く多孔質）も同様に使用することができる。こ
れらはプラスチック成形体に接着し６、ないので、本発
明においてはプラスチックピストンの先端部に埋込んで
取付ける。すなわち上記結晶化ガラスまたは焼結体をピ
ストンの径に応じた直径と厚さをもつ円板（断熱板）に
成型し、プラスチックピストンの開口端にふたをするよ
うに埋込む。さらに該断熱板が外れるのを防ぐため、本
発明においてはＳＯ３製のクリップによって上から押え
、クリップのつめはピストン開口端とピストン本体くプ
ラスチック成形体）の間のピストンシ・−ルのはめ合せ
溝に留める。クリップのつめ巾は断熱板をプラスチック
ピストンの先端に安全、確実に固定することができるよ
うに設定する。There is Na ) Af (Si 03 ). Also silicon nitride 3i 3 N4, silicon carbide (carborundum)
Porous ceramic sintered bodies of powders such as Si 2 C and zirconia ZrOz can also be used. Since these are not adhered to the plastic molded body 6, in the present invention they are embedded and attached to the tip of the plastic piston. That is, the crystallized glass or sintered body is molded into a disk (insulating plate) having a diameter and thickness corresponding to the diameter of the piston, and is embedded in the open end of the plastic piston so as to cover it. Furthermore, in order to prevent the heat insulating plate from coming off, in the present invention, it is held down from above by a clip made of SO3, and the claw of the clip is fitted into the fitting groove of the piston seal between the open end of the piston and the piston body (plastic molded body). keep it at that. The claw width of the clip is set so that the insulation plate can be safely and reliably fixed to the tip of the plastic piston.

以下の本発明を図面に示す実施例によって説明する。The present invention will be explained below with reference to embodiments shown in the drawings.

第１図（イ〉、（ロ）はそれぞれ本発明の断熱構造をも
つブレーキピストンの側面図および平面図である。プラ
スチックピストン本体（１）開口端（２）に円形の断熱
板（５）を埋込み嵌合し、その外れ止として断熱板（５
）を覆う大きさの円板部の周辺部に円周方向等間隔に例
えば４本のつめを突設したＳＵＳクリップ（６）を取付
け、クリップの上記つめをピストン本体（１）と開口端
（２）の間のピストンシールのはめ合ぜ溝（３）に係止
する。これによって本発明の断熱構造の目的が達せられ
、高温時プラスチックピストンの先端部に発生する熱ク
ラツクを防止することかできる。Figures 1 (a) and 1 (b) are a side view and a plan view, respectively, of a brake piston with a heat insulating structure according to the present invention.A circular heat insulating plate (5) is attached to the open end (2) of the plastic piston body (1). It is embedded and fitted, and a heat insulating plate (5
) Attach a SUS clip (6) with, for example, four claws protruding at equal intervals in the circumferential direction to the periphery of a disc portion large enough to cover the piston body (1) and the open end ( 2) into the fitting groove (3) of the piston seal. This achieves the purpose of the heat insulating structure of the present invention, and can prevent thermal cracks occurring at the tip of the plastic piston at high temperatures.

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

第１図（イ）、（ロ）はそれぞれ本発明による断熱構造
をもつピストンの側面図および平面図である。図におい
て、 １・・・・・・ピストン本体 ２・・・・・・ピストン開口端 ３・・・・・・ピストンのはめ合せ溝 ４・・・・・・ピストン空洞部 ５・・・・・・断　熱　板 ６・・・・・・外れ化クリップ 第１ Ｃイ （！FIGS. 1A and 1B are a side view and a plan view, respectively, of a piston having a heat insulating structure according to the present invention. In the figure, 1...Piston body 2...Piston opening end 3...Piston fitting groove 4...Piston cavity 5...・Insulation plate 6...Removable clip No. 1 C (!

Claims (2)

【特許請求の範囲】[Claims] （１）プラスチック製ディスクブレーキピストンにおい
て該ピストンのパッド裏金と接触する先端部分を断熱板
にしたことを特徴とする断熱構造をもつピストン。(1) A plastic disc brake piston having a heat insulating structure, characterized in that the tip portion of the piston that contacts the pad back metal is made into a heat insulating plate. （２）断熱板の材料がβスポジュメン系結晶化ガラス、
または窒化ケイ素、炭化ケイ素、ジルコニアの焼結体で
ある特許請求の範囲第１項記載の断熱構造をもつピスト
ン。(2) The material of the heat insulating board is β-spodumene crystallized glass,
The piston having a heat-insulating structure according to claim 1, which is a sintered body of silicon nitride, silicon carbide, or zirconia.
JP60140751A 1985-06-27 1985-06-27 Piston having heat insulating construction Pending JPS622028A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60140751A JPS622028A (en) 1985-06-27 1985-06-27 Piston having heat insulating construction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60140751A JPS622028A (en) 1985-06-27 1985-06-27 Piston having heat insulating construction

Publications (1)

Publication Number Publication Date
JPS622028A true JPS622028A (en) 1987-01-08

Family

ID=15275885

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60140751A Pending JPS622028A (en) 1985-06-27 1985-06-27 Piston having heat insulating construction

Country Status (1)

Country Link
JP (1) JPS622028A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5484041A (en) * 1993-09-10 1996-01-16 Rockwell International Corporation Composite brake piston with internal cushion and stop
US5509508A (en) * 1994-05-05 1996-04-23 Kateco, Inc. Unitary clip and shim device for brake pad or the like
US5713435A (en) * 1994-08-17 1998-02-03 Kelsey-Hayes Company Molded piston having metallic cover for disc brake assembly
US5845747A (en) * 1995-11-13 1998-12-08 Dayton Walther Corporation Piston with extended outer cover for use in disc brake assembly
JP2006283777A (en) * 2005-03-31 2006-10-19 Sumitomo Bakelite Co Ltd Resin brake piston

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5962773A (en) * 1982-09-29 1984-04-10 Nissin Kogyo Kk Plastic piston
JPS6038944B2 (en) * 1980-08-06 1985-09-03 株式会社日立製作所 Flat coil winding device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6038944B2 (en) * 1980-08-06 1985-09-03 株式会社日立製作所 Flat coil winding device
JPS5962773A (en) * 1982-09-29 1984-04-10 Nissin Kogyo Kk Plastic piston

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5484041A (en) * 1993-09-10 1996-01-16 Rockwell International Corporation Composite brake piston with internal cushion and stop
US5509508A (en) * 1994-05-05 1996-04-23 Kateco, Inc. Unitary clip and shim device for brake pad or the like
US5713435A (en) * 1994-08-17 1998-02-03 Kelsey-Hayes Company Molded piston having metallic cover for disc brake assembly
US5845747A (en) * 1995-11-13 1998-12-08 Dayton Walther Corporation Piston with extended outer cover for use in disc brake assembly
JP2006283777A (en) * 2005-03-31 2006-10-19 Sumitomo Bakelite Co Ltd Resin brake piston

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