JPH1151098A - Disc brake - Google Patents

Disc brake

Info

Publication number
JPH1151098A
JPH1151098A JP9204716A JP20471697A JPH1151098A JP H1151098 A JPH1151098 A JP H1151098A JP 9204716 A JP9204716 A JP 9204716A JP 20471697 A JP20471697 A JP 20471697A JP H1151098 A JPH1151098 A JP H1151098A
Authority
JP
Japan
Prior art keywords
piston
seal member
peripheral surface
mirror
brake device
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.)
Granted
Application number
JP9204716A
Other languages
Japanese (ja)
Other versions
JP3843168B2 (en
Inventor
Yukio Iwata
幸雄 岩田
Hiroo Kobayashi
洋夫 小林
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 Brake Industry Co Ltd
Original Assignee
Akebono Brake Industry 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 Akebono Brake Industry Co Ltd filed Critical Akebono Brake Industry Co Ltd
Priority to JP20471697A priority Critical patent/JP3843168B2/en
Publication of JPH1151098A publication Critical patent/JPH1151098A/en
Application granted granted Critical
Publication of JP3843168B2 publication Critical patent/JP3843168B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • F16D65/00Parts or details
    • F16D65/14Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
    • 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
    • F16D2125/00Components of actuators
    • F16D2125/02Fluid-pressure mechanisms
    • F16D2125/06Pistons

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Devices (AREA)
  • Braking Arrangements (AREA)

Abstract

PROBLEM TO BE SOLVED: To properly restrain generation of shake-back phenomenon and knock-back phenomenon by fixing an annular seal member capable of facewise sliding on an outer peripheral surface of a piston to an inner peripheral surface of a cylinder, and divisionwise forming a mirror-finished surface and satin-finished surface on one of the piston outer peripheral surface and an inner peripheral surface of the seal member. SOLUTION: A pair of pads 22 press both side surfaces of a rotor 21 by the aid of a piston 26 and a caliper 23. The piston 26 is stored in a cylinder 25 through an annular seal member 12 and applied with mirror finish work on its outer peripheral surface. A mirror-finished surface 13 and a satin-fininshed surface 14 is divisionwise formed on an inner peripheral surface of the seal member 12 so as to be of a band shape continuos to the axial direction of the seam member 12 and positioned alternately in the circumferential direction in a multiple number. By properly selecting the surface conditions, area ratios, division form, etc., of worked surfaces 13, 14, the sliding resistance between the pinston 26 and the seal member 12 can be set to a required value. Accordingly, a shake-back phenomenon and a nock-back penomenon can be restrained properly and the working resistance is also set to a required value easily to thereby improve the assembling work for the piston 26.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、ディスクブレーキ
装置に係り、作動抵抗を所望値に設定でき、かつ、ピス
トンの組立作業性を向上できるディスクブレーキ装置に
関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc brake device, and more particularly, to a disc brake device capable of setting an operation resistance to a desired value and improving workability of piston assembly.

【0002】[0002]

【従来の技術】図2に、車両に用いられるディスクブレ
ーキ装置20の概略を示す。このディスクブレーキ装置20
は、略円盤状に形成されたロータ21を厚み方向に挟むよ
うに対向配置された一対のパッド22,22と、軸方向に移
動可能なキャリパ23とを含んで構成され、一対のパッド
22,22はピストン26およびキャリパ23の爪部24によりロ
ータ21の両側面に押圧される。
2. Description of the Related Art FIG. 2 schematically shows a disc brake device 20 used in a vehicle. This disc brake device 20
Is configured to include a pair of pads 22, 22 opposed to each other so as to sandwich the rotor 21 formed in a substantially disk shape in the thickness direction, and a caliper 23 movable in the axial direction.
22, 22 are pressed against both side surfaces of the rotor 21 by the piston 26 and the claw portion 24 of the caliper 23.

【0003】ピストン26は、キャリパ23に一体形成され
たシリンダ25にシール部材27を介して液密されており、
図示しない液圧回路からシリンダ25内に圧液を供給する
ことにより軸方向に突出可能、換言すればロータ21の一
側面に対して近付く方向(図中左方)に移動可能とされ
ている。シール部材27は、環状に形成されてシリンダ25
の内周面に形成した環状溝に組付けられており、液圧回
路の加圧によりピストン26がシリンダ25から突出すると
きに弾性変形し、液圧回路の加圧が解除されると初期形
状に回復することによりロータ21から離れる方向(図中
右方)にピストン26を復帰させる。
[0003] The piston 26 is liquid-tight through a seal member 27 to a cylinder 25 integrally formed with the caliper 23.
By supplying a hydraulic fluid from a hydraulic circuit (not shown) into the cylinder 25, the hydraulic fluid can project in the axial direction, in other words, can move in a direction approaching one side surface of the rotor 21 (leftward in the figure). The seal member 27 is formed in an annular shape,
The piston 26 is elastically deformed when the piston 26 projects from the cylinder 25 due to the pressurization of the hydraulic circuit, and the initial shape is released when the pressurization of the hydraulic circuit is released. The piston 26 is returned in the direction away from the rotor 21 (rightward in the figure).

【0004】ところで、一般に、ディスクブレーキ装置
20を作動させない状態で車両が長距離走行すると、ロー
タ21の振れや車体の振動等によりパッド22を介してピス
トン26が徐々に押し戻され、ロータ21およびパッド22間
の離間寸法が大きくなる現象(シェークバック現象)が
生ずる。また、車両の旋回時にロータ21がディスクブレ
ーキ装置20に対して傾斜することにより同様にピストン
26が押し戻され、ロータ21およびパッド22間の離間寸法
が大きくなる減少(ノックバック現象)が生ずる。これ
らのような現象を抑制するために、図2に示すディスク
ブレーキ装置20は、ピストン26の外周面に鏡面加工が施
されているとともに、シール部材27の内周面にも鏡面加
工を施してピストン26とシール部材27との密着性を向上
させることにより、ピストン26およびシール部材27の摺
接抵抗が高められている。
By the way, in general, a disc brake device
If the vehicle travels a long distance without the operation of the piston 20, the piston 26 is gradually pushed back through the pad 22 due to the vibration of the rotor 21 or the vibration of the vehicle body, and the phenomenon that the separation dimension between the rotor 21 and the pad 22 becomes large ( (Shakeback phenomenon) occurs. Also, when the vehicle turns, the rotor 21 is inclined with respect to the disc brake device 20 so that the piston
26 is pushed back, and the distance between the rotor 21 and the pad 22 becomes large, resulting in a decrease (knockback phenomenon). In order to suppress such phenomena, the disk brake device 20 shown in FIG. 2 has a mirror finish on the outer peripheral surface of the piston 26 and a mirror finish on the inner peripheral surface of the seal member 27. By improving the adhesion between the piston 26 and the seal member 27, the sliding contact resistance between the piston 26 and the seal member 27 is increased.

【0005】[0005]

【発明が解決しようとする課題】しかしながら、前述し
たディスクブレーキ装置20では、ピストン26およびシー
ル部材27の摺接抵抗、換言すれば作動抵抗が高められて
いるため、パッド22をロータ21の側面に押圧するために
必要とするブレーキ液量が多くなり、かつ、ピストンの
組立作業性が悪くなる傾向にある。このため、シェーク
バック現象およびノックバック現象を適度に抑制できる
とともに、作動抵抗を所望値に設定できるディスクブレ
ーキ装置が求められている。また、このようなディスク
ブレーキ装置20では、シール部材27の摺動抵抗が大きい
ので、ピストン26の組立作業に手間が掛かるため、改善
が望まれていた。本発明は、前述した要望を満たすため
になされたものであり、その目的はシェークバック現象
およびノックバック現象を適度に抑制できるとともに、
作動抵抗を所望値に容易に設定でき、かつ、ピストンの
組立作業性に優れたディスクブレーキ装置を提供するこ
とにある。
However, in the above-described disc brake device 20, since the sliding contact resistance of the piston 26 and the seal member 27, in other words, the operating resistance, is increased, the pad 22 is attached to the side surface of the rotor 21. There is a tendency that the amount of brake fluid required for pressing increases and the workability of assembling the piston deteriorates. For this reason, there is a demand for a disc brake device that can appropriately suppress the shakeback phenomenon and the knockback phenomenon and that can set the operating resistance to a desired value. In such a disc brake device 20, since the sliding resistance of the seal member 27 is large, the assembling work of the piston 26 is troublesome, and thus an improvement has been desired. The present invention has been made in order to satisfy the above-described demand, and the object is to appropriately suppress the shakeback phenomenon and the knockback phenomenon,
An object of the present invention is to provide a disk brake device which can easily set an operation resistance to a desired value and which is excellent in piston assembling workability.

【0006】[0006]

【課題を解決するための手段】前述した要望に鑑みて、
本発明者等は、鏡面加工が施されたピストンの外周面に
対して面接触するシール部材の作動抵抗と、相互接触す
るピストンの外周面あるいはシール部材の内周面に梨地
加工が施された場合の作動抵抗とを測定し、図3に示す
結果を得た。そして、本発明は、ピストンの外周面ある
いはシール部材の内周面に、鏡面加工面と梨地加工面と
を混在させて所望の作動抵抗値を選択すれば、前述した
要望を満たせることに着目してなされたものである。
SUMMARY OF THE INVENTION In view of the aforementioned needs,
The inventor of the present invention has applied a matte finish to the working resistance of the seal member that makes surface contact with the outer peripheral surface of the mirror-finished piston and the outer peripheral surface of the piston or the inner peripheral surface of the seal member that makes mutual contact. The working resistance was measured, and the results shown in FIG. 3 were obtained. The present invention focuses on the fact that the above-described demand can be satisfied by selecting a desired working resistance value by mixing a mirror-finished surface and a matte-finished surface on the outer peripheral surface of the piston or the inner peripheral surface of the seal member. It was done.

【0007】従って、本発明のディスクブレーキ装置
は、請求項1に記載したように、略円盤状に形成された
ロータの側面にパッドを押圧するためにシリンダに収容
されたピストンを有し、前記シリンダから突出した前記
ピストンを引き戻すために、前記ピストンの外周面に面
摺接可能な環状のシール部材が前記シリンダの内周面に
固定されているディスクブレーキ装置であって、前記ピ
ストンの外周面と前記シール部材の内周面とのうちの一
方に鏡面加工面および梨地加工面が区画形成されている
ことを特徴としている。
Accordingly, the disk brake device of the present invention has a piston housed in a cylinder for pressing a pad on a side surface of a substantially disk-shaped rotor, as described in claim 1; An annular seal member, which is capable of sliding in contact with an outer peripheral surface of the piston, is fixed to an inner peripheral surface of the cylinder in order to pull back the piston protruding from a cylinder, wherein the outer peripheral surface of the piston is provided. A mirror-finished surface and a matte-finished surface are defined on one of the inner surface and the inner peripheral surface of the seal member.

【0008】これらの鏡面加工面および梨地加工面は、
ピストンあるいはシール部材の軸方向に連続する帯状に
形成しておくとともに、ピストンあるいはシール部材の
周面を周方向に区画するように周方向に沿って交互に配
置しておけばよい。また、鏡面加工面および梨地加工面
の配置形態としては、例えばピストンあるいはシール部
材の周面を格子状に区画するような配置形態や、ピスト
ンあるいはシール部材の周面を螺旋状に区画するような
配置形態等を採用してもよく、結果的にピストンおよび
シール部材の作動抵抗を所望値に設定できればよい。な
お、これらの鏡面加工面および梨地加工面は、ピストン
の外周面およびシール部材の内周面のうちの一方に形成
する。
The mirror-finished surface and the satin-finished surface are
The piston or the seal member may be formed in a continuous band shape in the axial direction, and may be alternately arranged along the circumferential direction so as to partition the peripheral surface of the piston or the seal member in the circumferential direction. Examples of the arrangement of the mirror-finished surface and the matte-finished surface include, for example, an arrangement in which the peripheral surface of the piston or the seal member is partitioned in a lattice shape, and a configuration in which the peripheral surface of the piston or the seal member is spirally partitioned. An arrangement form or the like may be adopted, and as long as the operating resistance of the piston and the seal member can be set to a desired value. The mirror-finished surface and the matte-finished surface are formed on one of the outer peripheral surface of the piston and the inner peripheral surface of the seal member.

【0009】このように構成されたディスクブレーキ装
置においては、ピストンの外周面とシール部材の内周面
とのうちの一方に鏡面加工面および梨地加工面が区画形
成されているため、これらの鏡面加工面および梨地加工
面の表面形態,面積比率,区画形態等を適宜選択すれ
ば、ピストンおよびシール部材の摺接抵抗を所望値に容
易に設定できることになる。すなわち、本発明のディス
クブレーキ装置においては、ピストンおよびシール部材
の作動抵抗を所望値に容易に設定できるため、シェーク
バック現象およびノックバック現象を適度に抑制できる
とともに、作動抵抗を所望値に容易に設定でき、かつ、
ピストンの組立作業性を向上できることになる。
In the disk brake device configured as described above, one of the outer peripheral surface of the piston and the inner peripheral surface of the seal member is formed with a mirror-finished surface and a matte-finished surface. By appropriately selecting the surface configuration, area ratio, partition configuration, and the like of the processed surface and the satin finished surface, the sliding contact resistance of the piston and the seal member can be easily set to a desired value. That is, in the disc brake device of the present invention, since the operating resistance of the piston and the seal member can be easily set to a desired value, the shakeback phenomenon and the knockback phenomenon can be appropriately suppressed, and the operating resistance can be easily set to the desired value. Can be set, and
The workability of assembling the piston can be improved.

【0010】また、本発明のディスクブレーキ装置にお
いては、請求項2に記載したように、前記鏡面加工面お
よび前記梨地加工面が軸線方向に沿って連続形成されて
いれば、ピストンおよびシール部材の相対位置に拘わら
ず一定の摺接抵抗を維持できることになる。
Further, in the disk brake device of the present invention, if the mirror-finished surface and the matte-finished surface are continuously formed along the axial direction, the piston and the seal member may be provided. A constant sliding contact resistance can be maintained regardless of the relative position.

【0011】一方、本発明のディスクブレーキ装置にお
いては、請求項3に記載したように、前記鏡面加工面お
よび前記梨地加工面が複数設けられていれば、周方向に
わたって均一な摺接抵抗が得られ、ピストンおよびシー
ル部材が相対的に軸振れする虞れを少なくできる。
On the other hand, in the disk brake device of the present invention, if a plurality of the mirror-finished surface and the matte-finished surface are provided, a uniform sliding contact resistance can be obtained in the circumferential direction. Thus, the risk that the piston and the seal member relatively oscillate can be reduced.

【0012】そして、本発明のディスクブレーキ装置に
おいては、請求項4に記載したように、前記鏡面加工面
および前記梨地加工面が前記シール部材の内周面に設け
られていれば、ピストンに別途加工を施す必要がないた
め、既存のピストンを流用できることになる。また、鏡
面加工面および梨地加工面が形成されたシール部材を既
存のディスクブレーキ装置に組み込めば、本発明のディ
スクブレーキ装置とすることができる。
In the disk brake device of the present invention, if the mirror-finished surface and the matte-finished surface are provided on the inner peripheral surface of the seal member, the piston is separately provided. Since there is no need to process, the existing piston can be used. Further, if the seal member having the mirror-finished surface and the satin-finished surface is formed in an existing disk brake device, the disk brake device of the present invention can be obtained.

【0013】[0013]

【発明の実施の形態】以下、本発明に係る実施の形態例
を図1に基づいて詳細に説明する。なお、以下に説明す
る実施の形態例において、既に図2において説明した部
材等については、図中に同一符号あるいは相当符号を付
すことにより説明を簡略化あるいは省略する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described below in detail with reference to FIG. In the embodiment described below, members and the like already described in FIG. 2 are denoted by the same reference numerals or corresponding reference numerals in the drawings to simplify or omit the description.

【0014】図1(A)に示すディスクブレーキ装置10
は、車両の車軸に固定されたロータ21を挟むようにキャ
リパ23に支持された一対のパッド22,22がピストン26お
よびキャリパ23の爪部11によりロータ21の両側面に押圧
される。ピストン26は、環状のシール部材12を介してシ
リンダ25に収容されている。ピストン26は、外周面に鏡
面加工が施されていて、ロータ21の一側面に対して近付
く方向(図中左方)に移動可能とされている。
The disc brake device 10 shown in FIG.
The pair of pads 22, 22 supported by the caliper 23 so as to sandwich the rotor 21 fixed to the axle of the vehicle are pressed against both side surfaces of the rotor 21 by the piston 26 and the claw 11 of the caliper 23. The piston 26 is housed in the cylinder 25 via the annular seal member 12. The outer peripheral surface of the piston 26 is mirror-finished, and is movable in a direction approaching one side surface of the rotor 21 (leftward in the drawing).

【0015】そして、この形態例のディスクブレーキ装
置10は、図1(B)に示すように、シール部材12の内周
面に鏡面加工面13および梨地加工面14が区画形成されて
いる。これらの鏡面加工面13および梨地加工面14は、シ
ール部材12の軸線方向に連続する帯状とされ、周方向に
沿って交互に複数配置されている。このようなディスク
ブレーキ装置10は、シール部材12およびピストン26の摺
接抵抗が所望値となるように、鏡面加工面13および梨地
加工面14の表面形態,面積比率,区画形態等を適宜選択
されている。
As shown in FIG. 1B, in the disc brake device 10 of this embodiment, a mirror-finished surface 13 and a matte-finished surface 14 are formed on the inner peripheral surface of the seal member 12. The mirror-finished surface 13 and the satin-finished surface 14 are formed in a continuous band shape in the axial direction of the seal member 12, and are alternately arranged in the circumferential direction. In such a disc brake device 10, the surface configuration, the area ratio, the partition configuration, and the like of the mirror-finished surface 13 and the matte-finished surface 14 are appropriately selected such that the sliding contact resistance between the seal member 12 and the piston 26 becomes a desired value. ing.

【0016】以上のようなディスクブレーキ装置10によ
れば、シール部材12の内周面に鏡面加工面13および梨地
加工面14が区画形成されているため、これらの鏡面加工
面13および梨地加工面14の表面形態,面積比率,区画形
態等を適宜選択すれば、ピストン26およびシール部材12
の摺接抵抗を所望値に容易に設定できる。従って、この
ディスクブレーキ装置10においては、ピストン26および
シール部材12の作動抵抗を所望値に設定することによ
り、従来に比較してシェークバック現象およびノックバ
ック現象を適度に抑制できるとともに、作動抵抗を所望
値に容易に設定でき、かつ、ピストン26の組立作業性を
向上できるという効果が得られる。
According to the disk brake device 10 described above, the mirror-finished surface 13 and the matte-finished surface 14 are formed on the inner peripheral surface of the seal member 12 so that the mirror-finished surface 13 and the matte-finished surface 14 are formed. By appropriately selecting the surface configuration, area ratio, partition configuration, and the like of the piston 14, the piston 26 and the sealing member 12
Can be easily set to a desired value. Therefore, in the disc brake device 10, by setting the operation resistance of the piston 26 and the seal member 12 to a desired value, the shakeback phenomenon and the knockback phenomenon can be more appropriately suppressed as compared with the related art, and the operation resistance can be reduced. It is possible to obtain an effect that the desired value can be easily set and the workability of assembling the piston 26 can be improved.

【0017】また、前述したディスクブレーキ装置10
は、鏡面加工面13および梨地加工面14が軸線方向に沿っ
て連続形成されているため、ピストン26およびシール部
材12の相対位置に関わらず一定の摺接抵抗を維持でき
る。
Also, the above-described disc brake device 10
Since the mirror-finished surface 13 and the matte-finished surface 14 are continuously formed along the axial direction, a constant sliding contact resistance can be maintained regardless of the relative positions of the piston 26 and the seal member 12.

【0018】そして、ディスクブレーキ装置10は、鏡面
加工面13および梨地加工面14が複数設けられているた
め、周方向にわたって均一な摺接抵抗が得られ、ピスト
ン26およびシール部材12が相対的に軸振れする虞れを少
ない。また、鏡面加工面13および梨地加工面14がシール
部材12の内周面に設けられているため、既存部品のピス
トン26を流用できる。特に、この形態例では、従来のデ
ィスクブレーキ装置との相違がシール部材12のみである
ため、従来のディスクブレーキ装置に本実施形態のシー
ル部材12を組み込めば、本発明のディスクブレーキ装置
10とすることができる。
Since the disk brake device 10 is provided with a plurality of mirror-finished surfaces 13 and a matte-finished surface 14, uniform sliding contact resistance is obtained in the circumferential direction, and the piston 26 and the seal member 12 are relatively moved. The risk of shaft runout is reduced. Further, since the mirror-finished surface 13 and the matte-finished surface 14 are provided on the inner peripheral surface of the seal member 12, the piston 26 of the existing component can be used. In particular, in this embodiment, the difference from the conventional disc brake device is only the seal member 12, so that if the seal member 12 of the present embodiment is incorporated in the conventional disc brake device, the disc brake device of the present invention
Can be 10.

【0019】なお、本発明のディスクブレーキ装置は、
前述した形態例に限定されるものでなく、適宜な変形,
改良等が可能である。例えば、前述した形態例において
は、鏡面加工面および梨地加工面がシール部材に区画形
成されていたが、図1(C)に示すように、鏡面加工面
13Aおよび梨地加工面14Aがピストン16の外周面に区画
形成されていてもよい。これらの鏡面加工面13Aおよび
梨地加工面14Aは、ピストン16の軸線方向に連続する帯
状とされ、周方向に沿って交互に複数形成されている。
本発明においては、このようなピストン16と従来のシー
ル部材との組み合わせをも含むものであり、これによっ
ても前述した形態例と所望の効果が得られる。
The disc brake device of the present invention
The present invention is not limited to the above-described embodiment,
Improvements are possible. For example, in the above-described embodiment, the mirror-finished surface and the satin-finished surface are defined in the seal member, but as shown in FIG.
13A and the satin finished surface 14A may be defined on the outer peripheral surface of the piston 16. The mirror-finished surface 13A and the satin-finished surface 14A are formed in a belt shape continuous in the axial direction of the piston 16, and are formed alternately in a plurality along the circumferential direction.
The present invention also includes a combination of such a piston 16 and a conventional sealing member, whereby the above-described embodiment and desired effects can be obtained.

【0020】その他、前述した形態例では、車両に適用
されたディスクブレーキ装置が例示されていたが、本発
明のディスクブレーキ装置は、鉄道,航空機,各種工作
機械や生産設備,搬送装置等にも適用可能である。そし
て、本発明は、キャリパが摺動可能な片押しピストンの
ディスクブレーキ装置にのみ適用可能なものではなく、
例えば対向ピストン式多ポットのディスクブレーキ装置
にも適用可能である。
In addition, in the above-described embodiment, the disc brake device applied to the vehicle is exemplified. However, the disc brake device of the present invention can be applied to railways, aircrafts, various machine tools, production facilities, transfer devices, and the like. Applicable. And, the present invention is not only applicable to a disc brake device of a single-push piston to which a caliper can slide,
For example, the present invention is also applicable to an opposed piston type multi-pot disc brake device.

【0021】[0021]

【発明の効果】以上、説明したように、本発明のディス
クブレーキ装置は、請求項1に記載したように、ピスト
ンの外周面シール部材の内周面とのうちの一方に鏡面加
工面および梨地加工面が区画形成されているため、これ
らの鏡面加工面および梨地加工面の表面形態,面積比
率,区画形態等を適宜選択してピストンおよびシール部
材の摺接抵抗を所望値に設定すれば、従来に比較してシ
ェークバック現象およびノックバック現象を適度に抑制
できるとともに、作動抵抗を所望値に容易に設定でき、
かつ、ピストンの組立作業性を向上できる。
As described above, according to the disk brake device of the present invention, as described in claim 1, one of the outer peripheral surface of the piston and the inner peripheral surface of the seal member has a mirror-finished surface and a matte surface. Since the processing surface is sectioned, if the surface form, area ratio, section form and the like of the mirror-finished surface and the satin-finished surface are appropriately selected and the sliding contact resistance of the piston and the seal member is set to a desired value, Shakeback and knockback phenomena can be moderately suppressed compared to the past, and the operating resistance can be easily set to a desired value.
In addition, the workability of assembling the piston can be improved.

【0022】また、本発明は、請求項2に記載したよう
に、鏡面加工面および梨地加工面が軸線方向に沿って連
続形成されていれば、ピストンおよびシール部材の相対
位置に関わらず一定の摺接抵抗を維持できる。
Further, according to the present invention, as long as the mirror-finished surface and the satin-finished surface are continuously formed along the axial direction, the present invention provides a fixed surface regardless of the relative positions of the piston and the seal member. Sliding resistance can be maintained.

【0023】そして、本発明は、請求項3に記載したよ
うに、鏡面加工面および梨地加工面が複数設けられてい
れば、周方向にわたって均一な摺接抵抗が得られ、ピス
トンおよびシール部材が相対的に軸振れする虞れを少な
くできる。また、本発明は、請求項4に記載したよう
に、鏡面加工面および梨地加工面がシール部材の内周面
に設けられていれば、ピストンに別途加工を施す必要が
ないため既存のピストンを流用でき、かつ、このシール
部材を既存のディスクブレーキ装置に組み込めば、本発
明のディスクブレーキ装置とすることができる。
According to the present invention, when a plurality of mirror-finished surfaces and a matte-finished surface are provided, uniform sliding contact resistance can be obtained in the circumferential direction, and the piston and the seal member can be formed. The possibility of relative shaft runout can be reduced. According to the present invention, as described in claim 4, if the mirror-finished surface and the matte-finished surface are provided on the inner peripheral surface of the seal member, it is not necessary to separately process the piston. If the seal member can be used and incorporated into an existing disc brake device, the disc brake device of the present invention can be obtained.

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

【図1】本発明に係る形態例を示す概略図である。FIG. 1 is a schematic view showing an embodiment according to the present invention.

【図2】従来のディスクブレーキ装置を示す概略図であ
る。
FIG. 2 is a schematic view showing a conventional disk brake device.

【図3】ピストンに対するシール部材の摺接抵抗値を示
すグラフ図である。
FIG. 3 is a graph showing a sliding resistance value of a seal member with respect to a piston.

【符号の説明】[Explanation of symbols]

10 ディスクブレーキ装置 12 シール部材 13 鏡面加工面 14 梨地加工面 21 ロータ 22 パッド 25 シリンダ 26 ピストン 10 Disc brake device 12 Seal member 13 Mirror-finished surface 14 Matte-finished surface 21 Rotor 22 Pad 25 Cylinder 26 Piston

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 略円盤状に形成されたロータの側面にパ
ッドを押圧するためにシリンダに収容されたピストンを
有し、前記シリンダから突出した前記ピストンを引き戻
すために、前記ピストンの外周面に面摺接可能な環状の
シール部材が前記シリンダの内周面に固定されているデ
ィスクブレーキ装置であって、 前記ピストンの外周面と前記シール部材の内周面とのう
ちの一方に鏡面加工面および梨地加工面が区画形成され
ていることを特徴とするディスクブレーキ装置。
1. A piston, which is housed in a cylinder for pressing a pad on a side surface of a rotor formed in a substantially disk shape, is provided on an outer peripheral surface of the piston for pulling back the piston protruding from the cylinder. A disk brake device in which an annular seal member capable of surface sliding contact is fixed to an inner peripheral surface of the cylinder, wherein one of an outer peripheral surface of the piston and an inner peripheral surface of the seal member has a mirror-finished surface. A disc brake device characterized in that a matte surface is sectioned and formed.
【請求項2】 前記鏡面加工面および前記梨地加工面が
軸線方向に沿って連続形成されていることを特徴とする
請求項1に記載したディスクブレーキ装置。
2. The disc brake device according to claim 1, wherein the mirror-finished surface and the matte-finished surface are continuously formed along an axial direction.
【請求項3】 前記鏡面加工面および前記梨地加工面が
複数設けられていることを特徴とする請求項1に記載し
たディスクブレーキ装置。
3. The disk brake device according to claim 1, wherein a plurality of said mirror-finished surfaces and said matte-finished surfaces are provided.
【請求項4】 前記鏡面加工面および前記梨地加工面が
前記シール部材の内周面に設けられていることを特徴と
する請求項1に記載したディスクブレーキ装置。
4. The disk brake device according to claim 1, wherein the mirror-finished surface and the matte-finished surface are provided on an inner peripheral surface of the seal member.
JP20471697A 1997-07-30 1997-07-30 Disc brake device Expired - Fee Related JP3843168B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20471697A JP3843168B2 (en) 1997-07-30 1997-07-30 Disc brake device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20471697A JP3843168B2 (en) 1997-07-30 1997-07-30 Disc brake device

Publications (2)

Publication Number Publication Date
JPH1151098A true JPH1151098A (en) 1999-02-23
JP3843168B2 JP3843168B2 (en) 2006-11-08

Family

ID=16495134

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20471697A Expired - Fee Related JP3843168B2 (en) 1997-07-30 1997-07-30 Disc brake device

Country Status (1)

Country Link
JP (1) JP3843168B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1561978A1 (en) * 2002-11-12 2005-08-10 Nok Corporation Rubber-like elastic part
JP2007187209A (en) * 2006-01-12 2007-07-26 Toyota Motor Corp Disk brake corresponding to pad abrasion
CN114096759A (en) * 2019-07-05 2022-02-25 株式会社万都 Clamp type brake

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1561978A1 (en) * 2002-11-12 2005-08-10 Nok Corporation Rubber-like elastic part
EP1561978A4 (en) * 2002-11-12 2006-06-07 Nok Corp Rubber-like elastic part
JP2007187209A (en) * 2006-01-12 2007-07-26 Toyota Motor Corp Disk brake corresponding to pad abrasion
CN114096759A (en) * 2019-07-05 2022-02-25 株式会社万都 Clamp type brake
CN114096759B (en) * 2019-07-05 2024-04-26 汉拿万都株式会社 Caliper brake

Also Published As

Publication number Publication date
JP3843168B2 (en) 2006-11-08

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