JPH05256364A - Hydraulic piston made of resin - Google Patents

Hydraulic piston made of resin

Info

Publication number
JPH05256364A
JPH05256364A JP5381092A JP5381092A JPH05256364A JP H05256364 A JPH05256364 A JP H05256364A JP 5381092 A JP5381092 A JP 5381092A JP 5381092 A JP5381092 A JP 5381092A JP H05256364 A JPH05256364 A JP H05256364A
Authority
JP
Japan
Prior art keywords
cylinder
hydraulic piston
weight
resin
master cylinder
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
JP5381092A
Other languages
Japanese (ja)
Inventor
Takayoshi Ito
藤 孝 悦 伊
Kiyotaka Nakai
井 清 隆 中
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.)
Aisin Corp
Original Assignee
Aisin Seiki 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 Aisin Seiki Co Ltd filed Critical Aisin Seiki Co Ltd
Priority to JP5381092A priority Critical patent/JPH05256364A/en
Publication of JPH05256364A publication Critical patent/JPH05256364A/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
    • F16D25/00Fluid-actuated clutches
    • F16D25/08Fluid-actuated clutches with fluid-actuated member not rotating with a clutching member
    • F16D25/088Fluid-actuated clutches with fluid-actuated member not rotating with a clutching member the line of action of the fluid-actuated members being distinctly separate from the axis of rotation

Abstract

PURPOSE:To improve the stability of a size, machining strength and wear resistance by adding a glass fiber, a carbon fiber and a fluoride resin to a base made of a polyamide resin and using a resin composition as its material. CONSTITUTION:The base of a hydraulic piston 3 being used to the cylinder 1 of a clutch master cylinder and the like is composed of a polyamide resin, which contains an acid amide bond in its molecule and is a polymer or a copolymer obtained from epsilon-caprolactam and the like and the polymer or the copolymer obtained by the polycondensation of a diamine like a hexamethylene diamine and the like with a dicarboxylic acid like a terephthalxc acid and the like or their mixture. 5-50 weight % of a glass tiber and 2-15 weight % of a carbon fiber are mixed into tnem in order to secure their strength. 3-15 wemght % of a polytetrafluoroethylene and the like is added into a fluoride resin. Thereby, an excellent size stability, machining strength and wear resistance can be obtained and the lightening of a vehicle and the like can be achieved without the drop of the reliability of a master cylinder.

Description

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

【0001】[0001]

【産業上の利用分野】本発明による油圧ピストンは、車
両、航空機等のブレーキマスタシリンダ、クラッチマス
タシリンダ、或いはホイルシリンダ、デイスクブレーキ
シリンダ等に使われる。
BACKGROUND OF THE INVENTION The hydraulic piston according to the present invention is used for a brake master cylinder, a clutch master cylinder, a wheel cylinder, a disc brake cylinder, etc. of a vehicle or an aircraft.

【0002】[0002]

【従来の技術】車両等の軽量化のために使用される、油
圧機器用のプランジャに使用される樹脂組成物として
は、特開昭58−38752号に開示されているものが
従来技術として公知である。前記従来技術には、結晶性
熱可塑性樹脂を基盤として、ガラス繊維等の繊維状補強
材、ヂメチルポリシロキサン及び活性炭を添加した樹脂
組成物が開示されている。
2. Description of the Related Art As a resin composition used for a plunger for hydraulic equipment, which is used for reducing the weight of a vehicle, the resin composition disclosed in JP-A-58-38752 is known as a prior art. Is. The above-mentioned prior art discloses a resin composition in which a fibrous reinforcing material such as glass fiber, dimethylpolysiloxane and activated carbon are added on the basis of a crystalline thermoplastic resin.

【0003】前記従来技術による樹脂組成物は、前記油
圧機器のゴムシール材との摺動特性が優れている反面、
これを油圧マスタシリンダのピストン等に使用した場
合、該ピストンとシリンダとの摺動により、該シリンダ
の傷つきが発生し、その使用には不適当である。
While the resin composition according to the prior art has excellent sliding characteristics with the rubber seal material of the hydraulic equipment,
When this is used for a piston of a hydraulic master cylinder, sliding of the piston and the cylinder causes damage to the cylinder, which is unsuitable for use.

【0004】[0004]

【発明が解決しようとする課題】そこで、本発明の課題
としては、ブレーキマスタシリンダ、クラッチマスタシ
リンダ、或いはホイルシリンダ、デイスクブレーキシリ
ンダ等に使用することのできる、その特性の優れた樹脂
組成物を材料とした油圧ピストンを提供することであ
る。
Therefore, an object of the present invention is to provide a resin composition having excellent properties which can be used for a brake master cylinder, a clutch master cylinder, a wheel cylinder, a disc brake cylinder, or the like. The purpose is to provide a hydraulic piston as a material.

【0005】[0005]

【課題を解決するための手段】上記課題を解決するため
に本発明においては、ポリアミド樹脂材料を基盤に、ガ
ラス繊維、カーボン繊維及びフッ素樹脂を添加した樹脂
組成物を材料としたことを特徴とする油圧ピストンとし
た。
In order to solve the above-mentioned problems, the present invention is characterized in that a resin composition containing glass fiber, carbon fiber and fluororesin as a base material is made of a polyamide resin material. It was a hydraulic piston.

【0006】[0006]

【作用】上記本発明による油圧ピストンは、寸法安定
性、機械的強度、及び耐磨耗性に優れており、又、摺動
する相手部材を傷つけないため、マスタシリンダ、或い
はホイルシリンダ等に使用するのに最適である。
The hydraulic piston according to the present invention is excellent in dimensional stability, mechanical strength, and wear resistance, and does not damage the mating member that slides. Therefore, it is used as a master cylinder or a wheel cylinder. Best to do.

【0007】[0007]

【実施例】以下、本発明の実施例を説明する。EXAMPLES Examples of the present invention will be described below.

【0008】図1はクラッチマスタシリンダの断面図で
あり、1は主に鋳鉄、或いはアルミ製のシリンダ、2は
クラッチ液を蓄えたタンク、3は油圧ピストンであり、
4は該油圧ピストン3に装着され、該シリンダ1内面と
の間でシール機能を保ったゴムカップである。図示しな
いクラッチペダルが踏まれると、プッシュロッド5によ
って該油圧ピストン3が、該シリンダ1内を図の左方向
に移動し、液圧室6内に圧力を発生させ、該圧力が図示
しないクラッチカバーに取付けられた、図示しないクラ
ッチレリーズに伝達することによって、クラッチ機構の
切断作動を行う。本発明は、上記したように該シリンダ
1内を摺動する該油圧ピストン3に関するものである。
従って、前記した樹脂組成物を材料とした該油圧ピスト
ン3には、該プッシュロッド5からの軸力と該液圧室6
から受ける圧力に耐えうる機械的強度と、金属製の該シ
リンダ1に対する耐磨耗性と、該シリンダ1の内面に対
して傷を与えない、低シリンダ攻撃性を兼ね備えていな
ければならない。
FIG. 1 is a cross-sectional view of a clutch master cylinder. 1 is a cylinder mainly made of cast iron or aluminum, 2 is a tank for storing clutch liquid, 3 is a hydraulic piston,
A rubber cup 4 is attached to the hydraulic piston 3 and maintains a sealing function with the inner surface of the cylinder 1. When a clutch pedal (not shown) is stepped on, the push rod 5 causes the hydraulic piston 3 to move leftward in the cylinder 1 to generate a pressure in the hydraulic chamber 6, and the pressure causes a clutch cover (not shown). The clutch mechanism is disengaged by transmission to a clutch release (not shown) attached to the. The present invention relates to the hydraulic piston 3 that slides in the cylinder 1 as described above.
Therefore, the hydraulic piston 3 made of the resin composition described above has the axial force from the push rod 5 and the hydraulic chamber 6
It must have mechanical strength capable of withstanding the pressure received from the cylinder, abrasion resistance against the metal cylinder 1, and low cylinder attack resistance that does not damage the inner surface of the cylinder 1.

【0009】本発明者は、表1に示した組成の混合物
を、スクリュー式押出し機で押出し、ペレット化した後
に、射出成形機により該油圧ピストン3と、材料物性測
定用の試験片を試作した。尚、表1中従来例とは、前記
従来技術に開示された樹脂組成物に該当するものであ
る。
The present inventor extruded a mixture having the composition shown in Table 1 with a screw type extruder and pelletized it, and then produced an experimental model of the hydraulic piston 3 and a test piece for measuring physical properties of the material by an injection molding machine. .. The conventional example in Table 1 corresponds to the resin composition disclosed in the prior art.

【0010】[0010]

【表1】 [Table 1]

【0011】図2は、本発明者が行った磨耗物性の評価
方法を表す図である。7は、図1に示した該シリンダ1
を半割りにしたカットシリンダで、材質はアルミ(AC
4C)を用い、該カットシリンダ7内面にはアルマイト
処理を行った。8は前記工程によって試作した油圧ピス
トンで、上部に重り台10を備え、該重り台10には5
kgの重り9が載せてある。この状態で、該油圧ピスト
ン8を片道の行程20mmのストロークで、1万回往復
摺動させた。前記試験後、該油圧ピストン8の重量を測
定し、試験前の重量と比較した。又、上記試験後の該カ
ットシリンダ7の表面状態の観察も行った。
FIG. 2 is a diagram showing a method of evaluating the wear physical properties performed by the present inventor. 7 is the cylinder 1 shown in FIG.
It is a cut cylinder that is cut in half and the material is aluminum (AC
4C), the inner surface of the cut cylinder 7 was anodized. Reference numeral 8 is a hydraulic piston manufactured by the above-mentioned process, which is provided with a weight base 10 on the upper part thereof, and the weight base 10 has a weight of 5
A weight 9 of kg is placed. In this state, the hydraulic piston 8 was slid back and forth 10,000 times with a stroke of one-way stroke of 20 mm. After the test, the weight of the hydraulic piston 8 was measured and compared with the weight before the test. Further, the surface condition of the cut cylinder 7 after the test was also observed.

【0012】表2に、本実施例、比較例及び従来例の引
張強度、自己磨耗量、及びシリンダ傷付性(攻撃性)に
ついての評価結果を表す。
Table 2 shows the evaluation results of the tensile strength, self-wear amount, and cylinder scratch resistance (aggressiveness) of this example, comparative example, and conventional example.

【0013】[0013]

【表2】 [Table 2]

【0014】該表2における各々の評価項目の基準は以
下の通りである。
The criteria for each evaluation item in Table 2 are as follows.

【0015】 引張強度 ○ 1000kg/cm2 以上 × 1000kg/cm2 未満 自己磨耗量 ○ 0.4mg未満 × 0.4mg以上 シリンダ傷付性 ☆ 傷付が全く認められない ○ 傷付がほとんど認められない × 傷付が認められる 該表2によれば、本発明による実施例は、比較例、従来
例に比べて、いずれも機械的強度、耐磨耗性、及びシリ
ンダ傷付性において、バランス良く優れていることが分
かる。
Tensile strength ○ 1000 kg / cm 2 or more × less than 1000 kg / cm 2 Self-wear amount ○ Less than 0.4 mg × 0.4 mg or more Cylinder scratchability ☆ No scratches are observed ○ Almost no scratches are observed × Scratch is recognized According to Table 2, the examples according to the present invention are excellent in mechanical strength, wear resistance, and cylinder scratch resistance in a well-balanced manner as compared with Comparative Examples and Conventional Examples. I understand that.

【0016】次に、本実施例に使用した各成分について
説明する。
Next, each component used in this example will be described.

【0017】ポリアミド樹脂(ナイロン樹脂)とは、
分子中に酸アミド結合(−CONH−)を有するもので
あり、具体的には、ε−カプロラクタム、6−アミノカ
プロン酸、ω−エナントラクタム、7−アミノヘプタン
酸、11−アミノウンデカン酸、9−アミノノナン酸、
α−ピロリドン、α−ピペリドンなどから得られる重合
体、又は共重合体、或いは、ヘキサメチレンジアミン、
ノナメチレンジアミン、ウンデカメチレンジアミン、ド
デカメチレンジアミン、メタキシリレンジアミンなどジ
アミンとテレフタル酸、イソフタル酸、アジピン酸、セ
バシン酸などのジカルボン酸とを重縮合して得られる重
合体もしくは共重合体もしくはこれらの混合物を例示す
ることができる。
What is a polyamide resin (nylon resin)?
It has an acid amide bond (-CONH-) in the molecule, and specifically, ε-caprolactam, 6-aminocaproic acid, ω-enanthlactam, 7-aminoheptanoic acid, 11-aminoundecanoic acid, 9- Aminononanoic acid,
α-pyrrolidone, a polymer obtained from α-piperidone, or a copolymer, or hexamethylenediamine,
Polymers or copolymers obtained by polycondensing diamines such as nonamethylenediamine, undecamethylenediamine, dodecamethylenediamine, metaxylylenediamine and dicarboxylic acids such as terephthalic acid, isophthalic acid, adipic acid, sebacic acid or These mixtures can be illustrated.

【0018】ガラス繊維としては、ガラスの組成、直
径及び長さは特に限定されるものではないが、例えば直
径が5〜20μm、長さが0.5〜5mmのものが好ま
しく又、添加量は、特に限定されるものではないが、ピ
ストンとしての強度を確保するために、5〜50重量
%、好ましくは10〜45重量%混入される。
The glass fiber is not particularly limited in composition, diameter and length of glass. For example, glass fibers having a diameter of 5 to 20 μm and a length of 0.5 to 5 mm are preferable, and the addition amount is Although not particularly limited, it is mixed in an amount of 5 to 50% by weight, preferably 10 to 45% by weight in order to secure the strength as a piston.

【0019】カーボン繊維としても、組成、直径、及
び長さは特に限定されるものではなく、又、添加量とし
ては、例えば2〜15重量%、コスト面から好ましくは
5〜10重量%が混入される。
The composition, diameter, and length of the carbon fiber are not particularly limited, and the addition amount is, for example, 2 to 15% by weight, preferably 5 to 10% by weight from the viewpoint of cost. To be done.

【0020】フッ素樹脂としては、ポリテトラフロロ
エチレン(PTFE)、4フッ化エチレン−6フッ化エ
チレン共重合体(FEP)、4フッ化エチレン−エチレ
ン共重合体(FTFE)、3フッ化塩化エチレン(EC
TFE)、フッ化ビニリデン(PVDF)等を例示でき
るが、好ましくはPTFEが使用される。又、添加量は
3〜15重量%が好ましい。
As the fluororesin, polytetrafluoroethylene (PTFE), tetrafluoroethylene-6-fluoroethylene copolymer (FEP), tetrafluoroethylene-ethylene copolymer (FTFE), trifluorochloroethylene (EC
TFE), vinylidene fluoride (PVDF) and the like can be exemplified, but PTFE is preferably used. The addition amount is preferably 3 to 15% by weight.

【0021】上記成分以外にも、必要に応じて他の繊
維状ウイスカー、顔料、成形性改良剤熱安定剤、発砲
剤、難燃剤などを配合するこができる。
In addition to the above components, if necessary, other fibrous whiskers, pigments, moldability-improving agents, heat stabilizers, foaming agents, flame retardants and the like can be added.

【0022】尚、比較例1〜5のものについては、ナイ
ロン66を基盤に、ガラス繊維、カーボン繊維、フッ素
樹脂(PTFE)を単独、もしくは2種類組み合わせて
配合した。
For Comparative Examples 1 to 5, glass fiber, carbon fiber, and fluororesin (PTFE) were blended on the basis of nylon 66 alone or in combination of two kinds.

【0023】尚、上記実施例では、クラッチマスタシリ
ンダの油圧ピストンの場合を示したが、本発明はこれに
限定されるものではなく、ブレーキマスタシリンダ、ホ
イルシリンダ、或いはデイスクブレーキシリンダの油圧
ピストン等にも広範囲に応用できるものである。
In the above embodiment, the hydraulic piston of the clutch master cylinder is shown, but the present invention is not limited to this, and the hydraulic master piston of the brake master cylinder, the wheel cylinder, the disc brake cylinder, or the like. It can also be applied to a wide range.

【0024】[0024]

【発明の効果】上記本発明による油圧ピストンは、寸法
安定性、機械的強度、及び耐磨耗性に優れており、又、
摺動する相手部材を傷つけないため、マスタシリンダ等
に使用すれば、該マスタシリンダの信頼性を低下させる
ことなく、車両等の軽量化を行うことができる。
The hydraulic piston according to the present invention is excellent in dimensional stability, mechanical strength and abrasion resistance, and
Since the sliding counterpart member is not damaged, if it is used for a master cylinder or the like, the weight of the vehicle or the like can be reduced without lowering the reliability of the master cylinder.

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

【図1】本発明による油圧ピストンが使用されるクラッ
チマスタシリンダの断面図
FIG. 1 is a sectional view of a clutch master cylinder in which a hydraulic piston according to the present invention is used.

【図2】本発明による油圧ピストンの磨耗物性の評価方
法を表す図
FIG. 2 is a diagram showing a method for evaluating wear physical properties of a hydraulic piston according to the present invention.

【符号の説明】[Explanation of symbols]

3、8 油圧ピストン 3,8 hydraulic piston

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 ポリアミド樹脂材料を基盤に、ガラス繊
維、カーボン繊維及びフッ素樹脂を添加した樹脂組成物
を材料としたことを特徴とする油圧ピストン。
1. A hydraulic piston comprising a polyamide resin material as a base material and a resin composition containing glass fibers, carbon fibers and a fluororesin added thereto.
【請求項2】 該樹脂組成物は、該ガラス繊維を5〜5
0重量%、該カーボン繊維を2〜15重量%、及び該フ
ッ素樹脂を3〜15重量%含んだものであることを特徴
とする特許請求の範囲第1項を満足する油圧ピストン。
2. The resin composition comprises 5 to 5 of the glass fibers.
A hydraulic piston satisfying claim 1 characterized in that it contains 0% by weight, 2 to 15% by weight of the carbon fiber, and 3 to 15% by weight of the fluororesin.
JP5381092A 1992-03-12 1992-03-12 Hydraulic piston made of resin Pending JPH05256364A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5381092A JPH05256364A (en) 1992-03-12 1992-03-12 Hydraulic piston made of resin

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5381092A JPH05256364A (en) 1992-03-12 1992-03-12 Hydraulic piston made of resin

Publications (1)

Publication Number Publication Date
JPH05256364A true JPH05256364A (en) 1993-10-05

Family

ID=12953153

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5381092A Pending JPH05256364A (en) 1992-03-12 1992-03-12 Hydraulic piston made of resin

Country Status (1)

Country Link
JP (1) JPH05256364A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0819734A1 (en) * 1996-07-19 1998-01-21 Ube Industries, Ltd. Polyamide resin composition
FR2841310A1 (en) * 2002-06-24 2003-12-26 Luk Lamellen & Kupplungsbau HYDRAULIC SYSTEM.
JP2009052678A (en) * 2007-08-27 2009-03-12 Honda Motor Co Ltd Hydraulic mechanism of vehicle
JP2014066323A (en) * 2012-09-26 2014-04-17 Nissin Kogyo Co Ltd Hydraulic master cylinder and process of manufacture of piston of hydraulic master cylinder
CN103897388A (en) * 2014-03-26 2014-07-02 常州光洋轴承股份有限公司 Nylon sleeve material for high-performance low-shrink release bearing and preparation method thereof
US10591039B2 (en) 2012-07-03 2020-03-17 Eaton Intelligent Power Limited Fiber reinforced plenum for limited-slip differential

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0819734A1 (en) * 1996-07-19 1998-01-21 Ube Industries, Ltd. Polyamide resin composition
FR2841310A1 (en) * 2002-06-24 2003-12-26 Luk Lamellen & Kupplungsbau HYDRAULIC SYSTEM.
US7059128B2 (en) 2002-06-24 2006-06-13 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Buhl Hydraulic system for a motor vehicle
JP2009052678A (en) * 2007-08-27 2009-03-12 Honda Motor Co Ltd Hydraulic mechanism of vehicle
US10591039B2 (en) 2012-07-03 2020-03-17 Eaton Intelligent Power Limited Fiber reinforced plenum for limited-slip differential
JP2014066323A (en) * 2012-09-26 2014-04-17 Nissin Kogyo Co Ltd Hydraulic master cylinder and process of manufacture of piston of hydraulic master cylinder
CN103897388A (en) * 2014-03-26 2014-07-02 常州光洋轴承股份有限公司 Nylon sleeve material for high-performance low-shrink release bearing and preparation method thereof

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