JP2008089086A - Electric linear motion actuator and electric brake device - Google Patents

Electric linear motion actuator and electric brake device Download PDF

Info

Publication number
JP2008089086A
JP2008089086A JP2006270903A JP2006270903A JP2008089086A JP 2008089086 A JP2008089086 A JP 2008089086A JP 2006270903 A JP2006270903 A JP 2006270903A JP 2006270903 A JP2006270903 A JP 2006270903A JP 2008089086 A JP2008089086 A JP 2008089086A
Authority
JP
Japan
Prior art keywords
electric
electric motor
shaft
diameter surface
spiral
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
JP2006270903A
Other languages
Japanese (ja)
Inventor
Tatsuya Yamazaki
達也 山崎
Masaaki Eguchi
雅章 江口
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.)
NTN Corp
Original Assignee
NTN Corp
NTN Toyo Bearing 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 NTN Corp, NTN Toyo Bearing Co Ltd filed Critical NTN Corp
Priority to JP2006270903A priority Critical patent/JP2008089086A/en
Publication of JP2008089086A publication Critical patent/JP2008089086A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • Braking Arrangements (AREA)
  • Transmission Devices (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To shorten the axial length of a whole electric linear motion actuator, and to release pressing force of the linear motion actuator, even if an electric motor causes failure and the supply of electricity is stopped. <P>SOLUTION: The electric motor 2 is installed in parallel to a cylindrical part 1a on a flange 1b arranged on one end side of the cylindrical part 1a of a casing 1, and the whole axial length can be shortened, by transmitting rotation of a rotor shaft 2a of the electric motor 2 to a rotary shaft 4 of the linear motion actuator arranged in the center of the cylindrical part 1a by gears 3a, 3b and 3c, and arranging a hexagonal hole 4a for a hexagonal wrench for manually rotating the rotary shaft 4 on an end surface of the rotary shaft 4 supported by a hole of a cover 1d. The pressing force of the linear actuator can be released, even if the electric motor 2 causes failure and the supply of electricity is stopped. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、電動モータの回転運動を直線運動に変換して被駆動物を直線駆動する電動式直動アクチュエータと、電動式直動アクチュエータを用いてブレーキ部材を被制動部材に押圧する電動式ブレーキ装置に関する。   The present invention relates to an electric linear motion actuator that linearly drives a driven object by converting the rotational motion of an electric motor into linear motion, and an electric brake that presses a brake member against the braked member using the electric linear motion actuator Relates to the device.

電動モータの回転運動を直線運動に変換して被駆動物を直線駆動する電動式直動アクチュエータには、運動変換機構としてボールねじ機構やボールランプ機構を採用したものが多く、小容量の電動モータで大きな直線駆動力が得られるように、遊星歯車減速機構等の歯車減速機構を組み込んだものが多い（例えば、特許文献１参照）。   Many of the electric linear actuators that convert the rotational motion of the electric motor into linear motion to drive the driven object linearly employ a ball screw mechanism or a ball ramp mechanism as the motion conversion mechanism. In many cases, a gear reduction mechanism such as a planetary gear reduction mechanism is incorporated so that a large linear driving force can be obtained (see, for example, Patent Document 1).

一方、車両用ブレーキ装置としては油圧式のものが多く採用されてきたが、近年、ＡＢＳ(Antilock Brake System)等の高度なブレーキ制御の導入に伴い、これらの制御を複雑な油圧回路なしに行うことができる電動式ブレーキ装置が注目されている。電動式ブレーキ装置は、ブレーキペダルの踏み込み信号等で電動モータを作動させ、上述したような電動式直動アクチュエータをキャリパボディに組み込んでブレーキ部材を被制動部材に押圧するものである（例えば、特許文献２参照）。   On the other hand, many hydraulic brake devices have been adopted, but in recent years, with the introduction of advanced brake control such as ABS (Antilock Brake System), these controls are performed without a complicated hydraulic circuit. Electric brake devices that can do this are attracting attention. The electric brake device operates an electric motor in response to a brake pedal depression signal or the like, and incorporates an electric linear actuator as described above into a caliper body to press a brake member against a member to be braked (for example, a patent) Reference 2).

通常、電動式ブレーキ装置は車両のばね下に取り付けられるので、路面からの振動を受けても安定して作動し、かつ、コンパクトに設計できるものが望まれる。   Usually, since the electric brake device is attached under the spring of the vehicle, it is desired to be able to operate stably even under vibration from the road surface and to be designed compactly.

特開平６−３２７１９０号公報（第１、５図）JP-A-6-327190 (Figs. 1 and 5) 特開２００３−３４３６２０号公報（第１図）JP 2003-343620 A (FIG. 1)

上述した従来の電動式直動アクチュエータに採用されているボールねじ機構やボールランプ機構は、リードを有するねじ筋や傾斜カム面に沿わせる運動変換機構によって、ある程度の増力機能を有するが、電動式ブレーキ装置等で必要とされるような大きな増力機能は確保できない。このため、これらの運動変換機構を採用した電動式直動アクチュエータでは、上述したような別途の減速機構を組み込んで駆動力を増力しているが、遊星歯車減速機構等の歯車減速機構を組み込むことは、電動式直動アクチュエータのコンパクトな設計を阻害する。   The ball screw mechanism and the ball ramp mechanism employed in the above-described conventional electric linear actuator have a certain degree of boosting function by the motion conversion mechanism along the lead screw thread and the inclined cam surface. A large boosting function as required by a brake device or the like cannot be secured. For this reason, in the electric linear actuator that employs these motion conversion mechanisms, the drive force is increased by incorporating a separate reduction mechanism as described above, but a gear reduction mechanism such as a planetary gear reduction mechanism is incorporated. Impedes the compact design of the electric linear actuator.

このような問題に対して、本出願人は、別途の減速機構を組み込むことなく大きな増力機能を確保でき、直動ストロークが小さい電動式ブレーキ装置にも好適な電動式直動アクチュエータとして、電動モータのロータ軸と、このロータ軸の外径側でケーシングの内径面に固定された外輪部材との間に、キャリヤに回転自在に支持された複数の遊星ローラを介在させて、これらの各遊星ローラがロータ軸の回転に伴ってロータ軸の周りを自転しながら公転するようにし、ロータ軸の外径面または外輪部材の内径面に螺旋凸条を設け、各遊星ローラの外径面に、螺旋凸条と同一ピッチで螺旋凸条が嵌まり込む周方向溝、または螺旋凸条と同一ピッチでリード角が異なり螺旋凸条が嵌まり込む螺旋溝を設けて、ロータ軸の周りを自転しながら公転する各遊星ローラを支持するキャリヤを軸方向へ相対移動させ、ロータ軸の回転運動をキャリヤの直線運動に変換する機構を先に提案している（特願２００５−２１７２５０、特願２００５−２１７４２９）。   For such problems, the present applicant can secure a large boosting function without incorporating a separate speed reduction mechanism, and an electric motor as an electric linear actuator suitable for an electric brake device having a small linear stroke. A plurality of planetary rollers rotatably supported by a carrier are interposed between the rotor shaft of the rotor and an outer ring member fixed to the inner diameter surface of the casing on the outer diameter side of the rotor shaft. Is rotated around the rotor shaft as the rotor shaft rotates, and spiral ridges are provided on the outer diameter surface of the rotor shaft or the inner diameter surface of the outer ring member, and a spiral is formed on the outer diameter surface of each planetary roller. While rotating the circumference of the rotor shaft by providing a circumferential groove in which the spiral ridge fits at the same pitch as the ridge, or a spiral groove in which the lead angle is different and the spiral ridge fits in the same pitch as the spiral ridge Revolve The carrier for supporting the planetary rollers are relatively moved in the axial direction, it has proposed a mechanism for converting the rotary motion of the rotor shaft to linear motion of the carrier previously (Japanese Patent Application No. 2005-217250, Japanese Patent Application No. 2005-217429).

上述した電動式直動アクチュエータは、電動モータのロータ軸の外径側に直動アクチュエータの各構成部品を配設し、電動モータと直動アクチュエータとを同軸上に直列に配置しているので、全体の軸方向長さ寸法が長くなる問題がある。   In the electric linear actuator described above, the components of the linear actuator are arranged on the outer diameter side of the rotor shaft of the electric motor, and the electric motor and the linear actuator are arranged in series on the same axis. There is a problem that the overall axial length is increased.

また、電動モータが故障したり、停電や断線等によって電気の供給が止まったりして、ロータ軸を回転できなくなると、遊星ローラの直線運動のロックを解除できず、例えば、電動式ブレーキ装置に適用したものでは、直動アクチュエータによるブレーキのロックを解除できなくなる問題もある。   Also, if the electric motor breaks down or the supply of electricity stops due to a power failure or disconnection, and the rotor shaft cannot be rotated, the linear motion of the planetary roller cannot be unlocked. In the application, there is a problem that the brake cannot be unlocked by the direct acting actuator.

そこで、本発明の課題は、電動式直動アクチュエータ全体の軸方向長さ寸法を短くすることと、電動モータが故障したり、電気の供給が止まったりしても、直動アクチュエータの押圧力を解除できるようにすることである。   Therefore, an object of the present invention is to shorten the axial length of the entire electric linear actuator, and to reduce the pressing force of the linear actuator even if the electric motor breaks down or the supply of electricity is stopped. It is to be able to cancel.

上記の課題を解決するために、本発明の電動式直動アクチュエータは、電動モータのロータ軸から回転を伝達される回転軸と、この回転軸の外径側でケーシングの内径面に固定された外輪部材との間に、キャリヤに回転自在に支持された複数の遊星ローラを介在させて、これらの各遊星ローラが前記回転軸の回転に伴って回転軸の周りを自転しながら公転するようにし、前記回転軸の外径面または前記外輪部材の内径面に螺旋凸条を設け、前記各遊星ローラの外径面に、前記螺旋凸条と同一ピッチで螺旋凸条が嵌まり込む周方向溝、または螺旋凸条と同一ピッチでリード角が異なり螺旋凸条が嵌まり込む螺旋溝を設けて、前記回転軸の周りを自転しながら公転する各遊星ローラを支持するキャリヤを軸方向へ相対移動させ、前記回転軸の回転運動を前記キャリヤの直線運動に変換して、被駆動物を直線駆動する電動式直動アクチュエータにおいて、前記回転軸を前記電動モータのロータ軸と同軸にならないように配置し、前記電動モータのロータ軸または前記回転軸を手動で回転させる手段を設けた構成を採用した。   In order to solve the above-described problems, an electric linear actuator according to the present invention is fixed to the inner diameter surface of the casing on the outer diameter side of the rotating shaft that transmits the rotation from the rotor shaft of the electric motor. A plurality of planetary rollers rotatably supported by the carrier are interposed between the outer ring member and each planetary roller so as to revolve while rotating around the rotation shaft as the rotation shaft rotates. A circumferential groove in which spiral ridges are provided on the outer diameter surface of the rotating shaft or the inner diameter surface of the outer ring member, and the spiral ridges are fitted on the outer diameter surface of each planetary roller at the same pitch as the spiral ridges. Alternatively, a spiral groove in which the spiral ridges are fitted at the same pitch as the spiral ridges and the spiral ridges are fitted is provided, and the carrier supporting each planetary roller that revolves while rotating around the rotation shaft is relatively moved in the axial direction. Rotation of the rotating shaft In the electric linear actuator that converts the movement into the linear motion of the carrier and drives the driven object linearly, the rotary shaft is arranged so as not to be coaxial with the rotor shaft of the electric motor, and the rotor of the electric motor The structure which provided the means to rotate a shaft or the said rotating shaft manually was employ | adopted.

すなわち、直動アクチュエータの回転軸を電動モータのロータ軸と同軸にならないように配置するとともに、電動モータのロータ軸または回転軸を手動で回転させる手段を設けることにより、全体の軸方向長さ寸法を短くでき、電動モータが故障したり、電気の供給が止まったりしても、電動モータのロータ軸または回転軸を手動で回転させて、直動アクチュエータの押圧力を解除できるようにした。   That is, by arranging the rotation axis of the linear actuator not to be coaxial with the rotor shaft of the electric motor, and by providing means for manually rotating the rotor shaft or rotation shaft of the electric motor, the overall axial length dimension Even if the electric motor breaks down or the supply of electricity is stopped, the rotor shaft or rotating shaft of the electric motor can be manually rotated to release the pressing force of the linear actuator.

前記回転軸を前記電動モータのロータ軸と並行に配置することにより、全体の軸方向長さ寸法を最も短くして、かつ、外形を凹凸の少ないコンパクトな形態とすることができる。   By disposing the rotating shaft in parallel with the rotor shaft of the electric motor, the overall axial length can be made the shortest and the outer shape can be made compact with less irregularities.

前記回転軸の外径面または外輪部材の内径面に設けた螺旋凸条を、これらの回転軸の外径面または外輪部材の内径面に設けた螺旋溝に周着した条部材で形成することにより、螺旋凸条を容易に精度よく形成することができる。   The spiral ridges provided on the outer diameter surface of the rotating shaft or the inner diameter surface of the outer ring member are formed by the strip members that surround the spiral grooves provided on the outer diameter surface of the rotating shaft or the inner diameter surface of the outer ring member. Thus, the spiral ridge can be easily formed with high accuracy.

また、本発明の電動式ブレーキ装置は、電動モータの回転運動を直線運動に変換してブレーキ部材を直線駆動する電動式直動アクチュエータを備え、前記直線駆動されるブレーキ部材を被制動部材に押圧する電動式ブレーキ装置において、前記電動式直動アクチュエータに上述したいずれかの電動式直動アクチュエータを用いることにより、別途の減速機構を組み込むことなく、大きな直線駆動力でブレーキを作動できるようにするとともに、直動アクチュエータ全体の軸方向長さ寸法を短くでき、電動モータが故障したり、電気の供給が止まったりしても、直動アクチュエータの押圧力を解除できるようにした。   The electric brake device according to the present invention includes an electric linear actuator that linearly drives the brake member by converting the rotational motion of the electric motor into a linear motion, and presses the brake member that is linearly driven against the member to be braked. In the electric brake device, any one of the electric linear actuators described above is used as the electric linear actuator so that the brake can be operated with a large linear driving force without incorporating a separate speed reduction mechanism. At the same time, the axial length of the entire linear actuator can be shortened, and the pressing force of the linear actuator can be released even if the electric motor breaks down or the supply of electricity is stopped.

本発明の電動式直動アクチュエータは、直動アクチュエータの回転軸を電動モータのロータ軸と同軸にならないように配置するとともに、電動モータのロータ軸または回転軸を手動で回転させる手段を設けたので、全体の軸方向長さ寸法を短くでき、電動モータが故障したり、電気の供給が止まったりしても、電動モータのロータ軸または回転軸を手動で回転させて、直動アクチュエータの押圧力を解除することができる。   Since the electric linear actuator of the present invention is arranged so that the rotary shaft of the linear actuator is not coaxial with the rotor shaft of the electric motor, means for manually rotating the rotor shaft or rotary shaft of the electric motor is provided. Even if the overall length in the axial direction can be shortened and the electric motor breaks down or the supply of electricity is stopped, the rotor shaft or rotating shaft of the electric motor is manually rotated to Can be released.

前記回転軸を前記電動モータのロータ軸と並行に配置することにより、全体の軸方向長さ寸法を最も短くして、かつ、外形を凹凸の少ないコンパクトな形態とすることができる。   By disposing the rotating shaft in parallel with the rotor shaft of the electric motor, the overall axial length can be made the shortest and the outer shape can be made compact with less irregularities.

前記回転軸の外径面または外輪部材の内径面に設けた螺旋凸条を、これらの回転軸の外径面または外輪部材の内径面に設けた螺旋溝に周着した条部材で形成することにより、螺旋凸条を容易に精度よく形成することができる。   The spiral ridges provided on the outer diameter surface of the rotating shaft or the inner diameter surface of the outer ring member are formed by the strip members that surround the spiral grooves provided on the outer diameter surface of the rotating shaft or the inner diameter surface of the outer ring member. Thus, the spiral ridge can be easily formed with high accuracy.

本発明の電動式ブレーキ装置は、電動式直動アクチュエータに上述した電動式直動アクチュエータを用いたので、別途の減速機構を組み込むことなく、大きな直線駆動力でブレーキを作動できるとともに、直動アクチュエータ全体の軸方向長さ寸法を短くでき、電動モータが故障したり、電気の供給が止まったりしても、直動アクチュエータの押圧力を解除することができる。   The electric brake device of the present invention uses the electric linear actuator described above as the electric linear actuator, so that the brake can be operated with a large linear driving force without incorporating a separate speed reduction mechanism, and the linear actuator The overall axial length can be shortened, and the pressing force of the linear actuator can be released even if the electric motor fails or the supply of electricity stops.

以下、図面に基づき、本発明の実施形態を説明する。図１乃至図４は、第１の実施形態の電動式直動アクチュエータを示す。この電動式直動アクチュエータは、図１乃至図３に示すように、ケーシング１の円筒部１ａの一端側で瓢箪形を形成するように張り出すフランジ１ｂが設けられて、このフランジ１ｂに電動モータ２が円筒部１ａと並行に取り付けられ、電動モータ２のロータ軸２ａの回転が歯車３ａ、３ｂ、３ｃによって円筒部１ａの中心に配設された回転軸４に伝達されるようになっており、回転軸４と円筒部１ａの円筒面とされた内径面に固定された外輪部材５との間に、キャリヤ６に回転自在に支持された３個の遊星ローラ７が介在し、各遊星ローラ７が回転軸４の回転に伴って、その周りを自転しながら公転するようになっている。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 4 show the electric linear actuator of the first embodiment. As shown in FIGS. 1 to 3, the electric linear actuator is provided with a flange 1b that projects so as to form a bowl shape on one end side of the cylindrical portion 1a of the casing 1, and an electric motor is provided on the flange 1b. 2 is mounted in parallel with the cylindrical portion 1a, and the rotation of the rotor shaft 2a of the electric motor 2 is transmitted to the rotating shaft 4 disposed at the center of the cylindrical portion 1a by gears 3a, 3b, 3c. Between the rotating shaft 4 and the outer ring member 5 fixed to the inner diameter surface of the cylindrical portion 1a, three planetary rollers 7 rotatably supported by the carrier 6 are interposed, and each planetary roller 7 revolves around the rotating shaft 4 while rotating around it.

前記ケーシング１のフランジ１ｂを設けた側には、円筒部１ａとフランジ１ｂを含めた外周に連なる周壁１ｃが設けられ、この周壁１ｃに蓋１ｄが取り付けられており、歯車３ａ、３ｂ、３ｃは、周壁１ｃと蓋１ｄで覆われた空間の軸方向同一断面内で噛み合うように配設されている。歯車３ｃを取り付けられた回転軸４は、蓋１ｄに設けられた孔に玉軸受８で支持され、ロータ軸２ａに取り付けられた歯車３ａと歯車３ｃに噛み合う中間歯車３ｂは、フランジ１ｂと蓋１ｄに差し渡された軸ピン９に玉軸受１０を介して取り付けられている。   On the side of the casing 1 where the flange 1b is provided, there is provided a peripheral wall 1c that continues to the outer periphery including the cylindrical portion 1a and the flange 1b, and a lid 1d is attached to the peripheral wall 1c, and the gears 3a, 3b, 3c are The inner wall 1c and the lid 1d are arranged so as to mesh with each other within the same axial cross section. The rotary shaft 4 to which the gear 3c is attached is supported by a ball bearing 8 in a hole provided in the lid 1d, and the intermediate gear 3b that meshes with the gear 3a and the gear 3c attached to the rotor shaft 2a includes the flange 1b and the lid 1d. Is attached to the shaft pin 9 passed through the ball bearing 10.

前記蓋１ｄの孔に支持された回転軸４の端面には、六角レンチ用の六角穴４ａが設けられ、蓋１ｄの孔はキャップ１ｅで閉塞されている。したがって、電動モータが故障したり、電気の供給が止まったりしても、キャップ１ｅを取り外して、六角レンチを用いて回転軸４を手動で回転させることにより、簡単に直動アクチュエータの押圧力を解除することができる。   A hexagon hole 4a for a hexagon wrench is provided on the end surface of the rotating shaft 4 supported by the hole of the lid 1d, and the hole of the lid 1d is closed by a cap 1e. Therefore, even if the electric motor breaks down or the supply of electricity is stopped, the cap 1e is removed, and the rotary shaft 4 is manually rotated using a hexagon wrench, so that the pressing force of the linear actuator can be easily reduced. It can be canceled.

前記ケーシング１の円筒部１ａの内径面には環状溝１１が設けられ、この環状溝１１に、外輪部材５に発生する直動アクチュエータの軸方向反力を受けるストッパ１２が嵌入され、その内径面を保持する円環状の保持部材１３が円筒部１ａの内径面に内嵌固定されている。ストッパ１２は、円周方向で複数に分割されて環状溝１１に容易に嵌入可能とされ、保持部材１３は、中間歯車３ｂと干渉しないように、円周方向の一部が切り欠かれている。   An annular groove 11 is provided on the inner diameter surface of the cylindrical portion 1a of the casing 1, and a stopper 12 that receives the axial reaction force of the linear motion actuator generated in the outer ring member 5 is fitted into the annular groove 11, and the inner diameter surface thereof. A ring-shaped holding member 13 is fixed to the inner diameter surface of the cylindrical portion 1a. The stopper 12 is divided into a plurality of parts in the circumferential direction and can be easily fitted into the annular groove 11, and the holding member 13 is partially cut away in the circumferential direction so as not to interfere with the intermediate gear 3b. .

前記各遊星ローラ７は、回転軸４に外嵌されたキャリヤ６の支持軸６ａに針状ころ軸受１４で回転自在に支持され、その自転がスラスト玉軸受１５でキャリヤ６に支持されている。また、各遊星ローラ７と一緒に公転するキャリヤ６には直線駆動部材１６がスラスト玉軸受１７で支持され、各遊星ローラ７の直線運動がキャリヤ６を介して直線駆動部材１６に伝達されるようになっている。   Each planetary roller 7 is rotatably supported by a needle roller bearing 14 on a support shaft 6 a of a carrier 6 fitted on the rotary shaft 4, and its rotation is supported by the carrier 6 by a thrust ball bearing 15. Further, a linear drive member 16 is supported by a thrust ball bearing 17 on the carrier 6 that revolves together with each planetary roller 7 so that the linear motion of each planetary roller 7 is transmitted to the linear drive member 16 via the carrier 6. It has become.

図４（ａ）に示すように、前記各遊星ローラ７が転接する外輪部材５の内径面には２条の螺旋溝５ａが設けられ、各螺旋溝５ａに周着された角形断面の条部材５ｂで、外輪部材５の内径面に２条の螺旋凸条が形成されている。また、図４（ｂ）に示すように、前記各遊星ローラ７の外径面には、条部材５ｂで形成された螺旋凸条が嵌まり込み、螺旋凸条と同一ピッチでリード角の異なる１条の螺旋溝７ａが設けられている。なお、外輪部材５の螺旋凸条を２条の多条螺旋としたのは、遊星ローラ７の螺旋溝７ａとのリード角の差の設定自由度を大きくするためであり、螺旋凸条は１条のものとしてもよい。また、図４（ａ）、（ｂ）に示された螺旋凸条と螺旋溝７ａの螺旋の向きは、互いに逆向きになっているように見えるが、図４（ａ）に示された螺旋凸条は、図４（ｂ）に示された螺旋溝７ａの裏側の部分に螺合するので、両者の螺旋の向きは同じである。したがって、回転軸４の周りを自転しながら公転し、その螺旋溝７ａが外輪部材５の螺旋凸条と螺合する各遊星ローラ７は、螺旋凸条と螺旋溝７ａとのリード角の差によって軸方向へ直線運動する。   As shown in FIG. 4 (a), two spiral grooves 5a are provided on the inner diameter surface of the outer ring member 5 to which the planetary rollers 7 are in rolling contact, and the strip members having a square cross section are circumferentially attached to the spiral grooves 5a. 5 b, two spiral ridges are formed on the inner diameter surface of the outer ring member 5. Further, as shown in FIG. 4B, the spiral ridge formed by the strip member 5b is fitted into the outer diameter surface of each planetary roller 7, and the lead angle is different at the same pitch as the spiral ridge. One spiral groove 7a is provided. The reason why the spiral ridges of the outer ring member 5 are two multi-threads is to increase the degree of freedom in setting the difference in the lead angle with the spiral groove 7a of the planetary roller 7. Articles may be used. 4A and 4B, the spiral directions of the spiral ridge and the spiral groove 7a appear to be opposite to each other, but the spiral shown in FIG. Since the ridge is screwed into the portion on the back side of the spiral groove 7a shown in FIG. 4B, the directions of the spirals of both are the same. Accordingly, each planetary roller 7 that revolves while rotating around the rotation shaft 4 and whose spiral groove 7a is screwed with the spiral protrusion of the outer ring member 5 has a difference in lead angle between the spiral protrusion and the spiral groove 7a. Move linearly in the axial direction.

図５は、上述した電動式直動アクチュエータを採用した電動式ブレーキ装置を示す。この電動式ブレーキ装置は、キャリパボディ２１の内部で被制動部材としてのディスクロータ２２の両側に、ブレーキ部材としてのブレーキパッド２３を対向配置したディスクブレーキであり、キャリパボディ２１に電動式直動アクチュエータのケーシング１が固定され、その直線駆動部材１６でブレーキパッド２３がディスクロータ２２に押圧されるようになっている。なお、この図では、電動式直動アクチュエータが図１で示した断面と直交する断面で示されており、直線駆動部材１６は押圧する側のブレーキパッド２３にキー２４で回り止めされている。   FIG. 5 shows an electric brake device that employs the electric linear actuator described above. This electric brake device is a disc brake in which brake pads 23 as brake members are arranged oppositely on both sides of a disc rotor 22 as a braked member inside the caliper body 21, and the electric linear actuator is connected to the caliper body 21. The brake pad 23 is pressed against the disc rotor 22 by the linear drive member 16. In this figure, the electric linear actuator is shown in a cross section orthogonal to the cross section shown in FIG. 1, and the linear drive member 16 is prevented from rotating by the key 24 on the brake pad 23 on the pressing side.

図６および図７は、第２の実施形態の電動式直動アクチュエータを示す。この電動式直動アクチュエータは、前記ケーシング１の円筒部１ａの一端側で角部を形成するように張り出すフランジ１ｂが設けられて、このフランジ１ｂに電動モータ２が円筒部１ａと直角に取り付けられ、電動モータ２のロータ軸２ａの回転が、ロータ軸２ａに取り付けられたウォーム３ｄから、回転軸４に取り付けられた歯車３ｃに伝達されるようになっており、円筒部１ａとフランジ１ｂを含めた外周に連なる周壁１ｃと蓋１ｄで覆われた空間に、これらのウォーム３ｄと歯車３ｃが噛み合うように配設されている。その他の部分は、第１の実施形態のものと同じであり、前記キャップ１ｅで閉塞された蓋１ｄの孔に支持された回転軸４の端面には、六角レンチ用の六角穴４ａが設けられている。また、ストッパ１２を保持する保持部材１３は、ウォーム３ｄが取り付けられたロータ軸２ａと干渉しないように、円周方向の一部が切り欠かれている。   6 and 7 show the electric linear actuator of the second embodiment. This electric linear actuator is provided with a flange 1b that projects so as to form a corner at one end of the cylindrical portion 1a of the casing 1, and the electric motor 2 is attached to the flange 1b at a right angle to the cylindrical portion 1a. The rotation of the rotor shaft 2a of the electric motor 2 is transmitted from the worm 3d attached to the rotor shaft 2a to the gear 3c attached to the rotation shaft 4, and the cylindrical portion 1a and the flange 1b are connected to each other. The worm 3d and the gear 3c are arranged so as to mesh with each other in a space covered with the peripheral wall 1c and the lid 1d connected to the outer periphery. Other parts are the same as those of the first embodiment, and a hexagonal hole 4a for a hexagonal wrench is provided on the end surface of the rotary shaft 4 supported by the hole of the lid 1d closed by the cap 1e. ing. The holding member 13 that holds the stopper 12 is partially cut away in the circumferential direction so as not to interfere with the rotor shaft 2a to which the worm 3d is attached.

上述した各実施形態では、回転軸の端面に六角レンチ用の六角穴を設けて、回転軸を手動で回転できるようにしたが、回転軸の端部外形を六角形や四角形とし、スパナやボックスレンチ等を用いて回転軸を回転させるようにしてもよい。これらの手動回転手段は、電動モータのロータ軸に設けてもよい。   In each of the above-described embodiments, a hexagon socket for a hexagon wrench is provided on the end surface of the rotation shaft so that the rotation shaft can be rotated manually. You may make it rotate a rotating shaft using a wrench. These manual rotation means may be provided on the rotor shaft of the electric motor.

また、上述した各実施形態では、外輪部材の内径面に螺旋凸条を設け、遊星ローラの外径面にこの螺旋凸条と同一ピッチでリード角が異なる螺旋溝を設けたが、螺旋凸条は回転軸の外径面に設けることもでき、遊星ローラの外径面には、螺旋凸条と同一ピッチの周方向溝を設けることもできる。   Further, in each of the embodiments described above, the spiral ridges are provided on the inner diameter surface of the outer ring member, and the spiral grooves having the same pitch as the spiral ridges and different lead angles are provided on the outer diameter surface of the planetary roller. Can also be provided on the outer diameter surface of the rotating shaft, and circumferential grooves having the same pitch as the spiral ridges can be provided on the outer diameter surface of the planetary roller.

第１の実施形態の電動式直動アクチュエータを示す縦断面図1 is a longitudinal sectional view showing an electric linear actuator according to a first embodiment. 図１のII−II線に沿った断面図Sectional view along the line II-II in FIG. 図１のIII−III線に沿った断面図Sectional view along line III-III in FIG. ａ、ｂは、それぞれ図１の外輪部材の螺旋凸条と遊星ローラの螺旋溝を示す正面図a and b are front views showing the spiral ridge of the outer ring member and the spiral groove of the planetary roller in FIG. 図１の電動式直動アクチュエータを採用した電動式ブレーキ装置を示す縦断面図1 is a longitudinal sectional view showing an electric brake device employing the electric linear actuator of FIG. 第２の実施形態の電動式直動アクチュエータを示す縦断面図A longitudinal sectional view showing an electric linear actuator of a second embodiment 図６のVII−VII線に沿った断面図Sectional drawing along the VII-VII line of FIG.

符号の説明Explanation of symbols

１ ケーシング
１ａ 円筒部
１ｂ フランジ
１ｃ 周壁
１ｄ 蓋
１ｅ キャップ
２ 電動モータ
２ａ ロータ軸
３ａ、３ｂ、３ｃ 歯車
３ｄ ウォーム
４ 回転軸
４ａ 六角穴
５ 外輪部材
５ａ 螺旋溝
５ｂ 条部材
６ キャリヤ
７ 遊星ローラ
７ａ 螺旋溝
８ 玉軸受
９ 軸ピン
１０ 玉軸受
１１ 環状溝
１２ ストッパ
１３ 保持部材
１４ 針状ころ軸受
１５ スラスト玉軸受
１６ 直線駆動部材
１７ スラスト玉軸受
２１ キャリパボディ
２２ ディスクロータ
２３ ブレーキパッド
２４ キー DESCRIPTION OF SYMBOLS 1 Casing 1a Cylindrical part 1b Flange 1c Perimeter wall 1d Lid 1e Cap 2 Electric motor 2a Rotor shaft 3a, 3b, 3c Gear 3d Worm 4 Rotating shaft 4a Hexagonal hole 5 Outer ring member 5a Spiral groove 5b Strip member 6 Carrier 7 Planetary roller 7a Spiral groove 8 Ball bearing 9 Axis pin 10 Ball bearing 11 Annular groove 12 Stopper 13 Holding member 14 Needle roller bearing 15 Thrust ball bearing 16 Linear drive member 17 Thrust ball bearing 21 Caliper body 22 Disc rotor 23 Brake pad 24 Key

Claims (4)

電動モータのロータ軸から回転を伝達される回転軸と、この回転軸の外径側でケーシングの内径面に固定された外輪部材との間に、キャリヤに回転自在に支持された複数の遊星ローラを介在させて、これらの各遊星ローラが前記回転軸の回転に伴って回転軸の周りを自転しながら公転するようにし、前記回転軸の外径面または前記外輪部材の内径面に螺旋凸条を設け、前記各遊星ローラの外径面に、前記螺旋凸条と同一ピッチで螺旋凸条が嵌まり込む周方向溝、または螺旋凸条と同一ピッチでリード角が異なり螺旋凸条が嵌まり込む螺旋溝を設けて、前記回転軸の周りを自転しながら公転する各遊星ローラを支持するキャリヤを軸方向へ相対移動させ、前記回転軸の回転運動を前記キャリヤの直線運動に変換して、被駆動物を直線駆動する電動式直動アクチュエータにおいて、前記回転軸を前記電動モータのロータ軸と同軸にならないように配置し、前記電動モータのロータ軸または前記回転軸を手動で回転させる手段を設けたことを特徴とする電動式直動アクチュエータ。   A plurality of planetary rollers rotatably supported by a carrier between a rotating shaft to which rotation is transmitted from the rotor shaft of the electric motor and an outer ring member fixed to the inner diameter surface of the casing on the outer diameter side of the rotating shaft These planetary rollers revolve while rotating around the rotation shaft as the rotation shaft rotates, and spiral ridges are formed on the outer diameter surface of the rotation shaft or the inner diameter surface of the outer ring member. A circumferential groove into which the spiral ridge is fitted at the same pitch as the spiral ridge, or a spiral ridge with a different lead angle at the same pitch as the spiral ridge. Providing a spiral groove to be rotated, relatively moving the carrier supporting each planetary roller that revolves around the rotating shaft in the axial direction, and converting the rotational motion of the rotating shaft into the linear motion of the carrier; Electricity that drives the driven object linearly An electric linear actuator, wherein the rotary shaft is arranged so as not to be coaxial with the rotor shaft of the electric motor, and means for manually rotating the rotor shaft of the electric motor or the rotary shaft is provided. Direct acting actuator. 前記回転軸を前記電動モータのロータ軸と並行に配置した請求項１に記載の電動式直動アクチュエータ。   The electric linear actuator according to claim 1, wherein the rotary shaft is arranged in parallel with a rotor shaft of the electric motor. 前記回転軸の外径面または外輪部材の内径面に設けた螺旋凸条を、これらの回転軸の外径面または外輪部材の内径面に設けた螺旋溝に周着した条部材で形成した請求項１または２に記載の電動式直動アクチュエータ。   The spiral protrusion provided on the outer diameter surface of the rotating shaft or the inner diameter surface of the outer ring member is formed by a strip member that is attached to a spiral groove provided on the outer diameter surface of the rotating shaft or the inner diameter surface of the outer ring member. Item 3. The electric linear actuator according to Item 1 or 2. 電動モータの回転運動を直線運動に変換してブレーキ部材を直線駆動する電動式直動アクチュエータを備え、前記直線駆動されるブレーキ部材を被制動部材に押圧する電動式ブレーキ装置において、前記電動式直動アクチュエータに請求項１乃至３のいずれかに記載の電動式直動アクチュエータを用いたことを特徴とする電動式ブレーキ装置。   An electric brake device that includes an electric linear actuator that linearly drives a brake member by converting a rotational movement of the electric motor into a linear movement, and presses the brake member that is linearly driven against the member to be braked. An electric brake device characterized in that the electric linear actuator according to any one of claims 1 to 3 is used as the dynamic actuator.
JP2006270903A 2006-10-02 2006-10-02 Electric linear motion actuator and electric brake device Pending JP2008089086A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2006270903A JP2008089086A (en) 2006-10-02 2006-10-02 Electric linear motion actuator and electric brake device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006270903A JP2008089086A (en) 2006-10-02 2006-10-02 Electric linear motion actuator and electric brake device

Publications (1)

Publication Number Publication Date
JP2008089086A true JP2008089086A (en) 2008-04-17

Family

ID=39373443

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2006270903A Pending JP2008089086A (en) 2006-10-02 2006-10-02 Electric linear motion actuator and electric brake device

Country Status (1)

Country Link
JP (1) JP2008089086A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11325062A (en) * 1998-05-19 1999-11-26 Koyo Seiko Co Ltd Bearing device
JP2004308695A (en) * 2003-04-02 2004-11-04 Asmo Co Ltd Brake system for vehicle
JP2006044632A (en) * 2004-06-30 2006-02-16 Nippon Cable Syst Inc Electric cable drive device and electric brake device
JP2006194356A (en) * 2005-01-13 2006-07-27 Ntn Corp Electric linear actuator and electric brake device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11325062A (en) * 1998-05-19 1999-11-26 Koyo Seiko Co Ltd Bearing device
JP2004308695A (en) * 2003-04-02 2004-11-04 Asmo Co Ltd Brake system for vehicle
JP2006044632A (en) * 2004-06-30 2006-02-16 Nippon Cable Syst Inc Electric cable drive device and electric brake device
JP2006194356A (en) * 2005-01-13 2006-07-27 Ntn Corp Electric linear actuator and electric brake device

Similar Documents

Publication Publication Date Title
JP5376279B2 (en) Electric linear actuator and electric brake device
JP4786240B2 (en) Electric linear actuator and electric brake device
JP5282998B2 (en) Electric linear actuator and electric brake device
JP4898123B2 (en) Electric linear actuator and electric brake device
JP5257764B2 (en) Electric linear actuator and electric brake device
WO2011040217A1 (en) Electrically operated linear actuator and electrically operated disc brake device
JP2011179542A (en) Electromotive linear actuator and electromotive disc brake
JP5585865B2 (en) Electric linear actuator and electric brake device
JP2007032717A (en) Electric linear motion actuator and electric brake device
JP2007127205A (en) Electric linear motion actuator and electric brake device
JP2008286386A (en) Electric direct-acting actuator and electric brake device
JP2008089084A (en) Electric linear motion actuator and electric brake device
JP2009041581A (en) Electric direct-acting actuator and electric brake
JP2008039169A (en) Electric linear actuator and electric brake device
JP2011174575A (en) Electric linear actuator and electric brake device
JP2009174585A (en) Electric linear-motion actuator and electric brake device
JP4991376B2 (en) Electric linear actuator and electric brake device
JP2001263395A (en) Electric disk brake
JP2010043674A (en) Electric linear-motion actuator and electric brake device
JP2008089086A (en) Electric linear motion actuator and electric brake device
JP4988280B2 (en) Electric linear actuator and electric brake device
JP5474475B2 (en) Electric linear actuator and electric brake device
JP2009168056A (en) Electric linear motion actuator and electric brake device
JP4446834B2 (en) Electric brake device
JP4690137B2 (en) Electric linear actuator and electric brake device

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20090916

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20101012

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20101026

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20101227

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20110517

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20110713

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20120124