JP2011236984A - Electric direct-action actuator and electric brake device - Google Patents

Electric direct-action actuator and electric brake device Download PDF

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JP2011236984A
JP2011236984A JP2010109365A JP2010109365A JP2011236984A JP 2011236984 A JP2011236984 A JP 2011236984A JP 2010109365 A JP2010109365 A JP 2010109365A JP 2010109365 A JP2010109365 A JP 2010109365A JP 2011236984 A JP2011236984 A JP 2011236984A
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rotation
electric
actuator
holding
outer ring
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Japanese (ja)
Inventor
Tatsuya Yamazaki
達也 山崎
Masaaki Eguchi
雅章 江口
Makoto Muramatsu
誠 村松
Tomomi Goto
知美 後藤
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NTN Corp
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NTN Corp
NTN Toyo Bearing Co Ltd
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Priority to JP2010109365A priority Critical patent/JP2011236984A/en
Priority to PCT/JP2011/060134 priority patent/WO2011142253A1/en
Publication of JP2011236984A publication Critical patent/JP2011236984A/en
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    • 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
    • F16D65/16Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
    • F16D65/18Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for disc brakes
    • 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
    • F16HGEARING
    • F16H25/00Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20Screw mechanisms
    • F16H25/24Elements essential to such mechanisms, e.g. screws, nuts
    • F16H25/2454Brakes; Rotational locks
    • 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
    • F16D2121/00Type of actuator operation force
    • F16D2121/18Electric or magnetic
    • F16D2121/24Electric or magnetic using motors
    • 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
    • F16D2125/18Mechanical mechanisms
    • F16D2125/20Mechanical mechanisms converting rotation to linear movement or vice versa
    • F16D2125/34Mechanical mechanisms converting rotation to linear movement or vice versa acting in the direction of the axis of rotation
    • F16D2125/40Screw-and-nut
    • 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
    • F16D2125/18Mechanical mechanisms
    • F16D2125/44Mechanical mechanisms transmitting rotation
    • F16D2125/46Rotating members in mutual engagement
    • F16D2125/48Rotating members in mutual engagement with parallel stationary axes, e.g. spur gears
    • 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
    • F16D2127/00Auxiliary mechanisms
    • F16D2127/06Locking mechanisms, e.g. acting on actuators, on release mechanisms or on force transmission mechanisms
    • 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
    • F16D2129/00Type of operation source for auxiliary mechanisms
    • F16D2129/06Electric or magnetic
    • F16D2129/08Electromagnets

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

Abstract

PROBLEM TO BE SOLVED: To provide an electric direct-action actuator used in an electric brake device with parking-brake functionality.SOLUTION: The electric direct-action actuator comprises: a clutch 31 that connects or isolates rotational input to/from rotational output at a rotating part of a rotating shaft 4 to which rotation is transmitted from a rotor shaft 2a of an electric motor 2; a connection/isolation means that switches the clutch 31 between a connection state and an isolation state; a torsion coil spring 32 that serves as an elastic member that stores rotational input; a hold/release means that switches between a hold state in which the rotational input stored in the torsion coil spring 32 is held and a release state in which the rotational input is released as rotational output; and a solenoid 34 that serves as an actuator for operating the connection/isolation means and the hold/release means. The electric direct-action actuator is also provided with a separate rotation application mechanism 30 that applies the rotational input stored in the torsion coil spring 32 to the rotating shaft 4 as rotational output when the connection/isolation means is operated into the connection state and the hold/release means is operated into the release state.

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、電動モータのロータ軸またはロータ軸から回転を伝達される回転部材の回転運動を、滑りねじ機構、ボールねじ機構、ボールランプ機構等の運動変換機構によって、回転の軸線方向に駆動される出力部材の直線運動に変換するものがある。これらの電動式直動アクチュエータは、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)。   An electric linear actuator that linearly drives a driven object by converting the rotary motion of the electric motor into a linear motion, the rotary motion of the rotor shaft of the electric motor or the rotation member transmitted from the rotor shaft, the sliding screw There is a mechanism that converts a linear motion of an output member driven in the axial direction of rotation by a motion conversion mechanism such as a mechanism, a ball screw mechanism, or a ball ramp mechanism. Many of these electric linear actuators incorporate a gear reduction mechanism such as a planetary gear reduction mechanism so that a large linear driving force can be obtained with a small-capacity electric motor (see, for example, Patent Document 1).

本発明者らは、別途の減速機構を組み込むことなく大きな直線駆動力を確保でき、直動ストロークが比較的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またはロータ軸から回転を伝達される回転軸のいずれかの回転軸部材と、回転軸部材の外径側でハウジングの内径面に内嵌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、これらの遊星ローラが回転軸部材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し、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、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、外輪部材とキャリヤとが回転の軸線方向へ相対移動するようにし、回転軸部材の回転運動をキャリヤの直線運動に変換して、キャリヤを被駆動物を直線駆動する出力部材とした機構を先に開発している(例えば、特許文献2、3参照)。また、外輪部材を被駆動物を直線駆動する出力部材とした機構も提案している(特願2008−260547)。   The present inventors can secure a large linear driving force without incorporating a separate speed reduction mechanism, and as an electric linear actuator suitable for an electric brake device having a relatively small linear stroke, the electric motor rotor shaft or The carrier is rotatably supported by the carrier between one of the rotation shaft members to which the rotation is transmitted from the rotor shaft and the outer ring member fitted on the inner diameter surface of the housing on the outer diameter side of the rotation shaft member. In addition, a plurality of planetary rollers are interposed so that these planetary rollers revolve while rotating around the rotation shaft member, and spiral ridges are provided on the inner diameter surface of the outer ring member, Provided on the radial surface is a circumferential groove into which the spiral ridges fit at the same pitch as the spiral ridges, or a spiral groove into which the spiral ridges fit at different pitches with the same pitch as the spiral ridges, Carrier Has previously developed a mechanism in which the rotational movement of the rotary shaft member is converted into the linear movement of the carrier, and the carrier is used as an output member for linearly driving the driven object. For example, see Patent Documents 2 and 3). A mechanism has also been proposed in which the outer ring member is an output member that linearly drives the driven object (Japanese Patent Application No. 2008-260547).

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4参照)。   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 4).

特開平6−327190号公報JP-A-6-327190 特開2007−32717号公報JP 2007-32717 A 特開2007−37305号公報JP 2007-37305 A 特開2003−343620号公報JP 2003-343620 A

特許文献1乃至3等に記載されたような、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を自動車のサービスブレーキとして使用する場合は、パーキングブレーキを別途に設ける必要があった。このため、ブレーキ装置全体をコンパクトに設計できるように、パーキングブレーキ機能を有する電動式直動アクチュエータを備えた電動式ブレーキ装置が要望されている。   When an electric linear actuator that converts the rotational motion of the electric motor into linear motion and drives the driven object linearly as described in Patent Documents 1 to 3 is used as a service brake of an automobile, a parking brake Must be provided separately. Therefore, there is a demand for an electric brake device including an electric linear actuator having a parking brake function so that the entire brake device can be designed compactly.

そこで、本発明の課題は、電動式ブレーキ装置に使用される電動式直動アクチュエータにパーキングブレーキ機能を持たせることである。   Accordingly, an object of the present invention is to provide a parking brake function to an electric linear actuator used in an electric brake device.

上記の課題を解決するために、本発明は、電動モータのロータ軸またはロータ軸から回転を伝達される回転部材の回転運動を、回転の軸線方向に駆動される出力部材の直線運動に変換する運動変換機構を備えた電動式直動アクチュエータにおいて、前記ロータ軸もしくは前記回転部材、または前記ロータ軸から回転部材へ回転を伝達する回転伝達部材のいずれかの回転部位に、回転入力と回転出力を連結、遮断するクラッチと、前記クラッチを連結状態と遮断状態に切り替える連結遮断手段と、前記回転入力を溜める弾性部材と、前記弾性部材に溜められた回転入力を保持する保持状態と、前記回転出力として解放する解放状態に切り替える保持解放手段と、前記連結遮断手段を作動する連結遮断アクチュエータと、前記保持解放手段を作動する保持解放アクチュエータとからなり、前記連結遮断手段を連結状態に作動して前記保持解放手段を解放状態に作動したときに、前記弾性部材に溜められた回転入力を回転出力として前記回転部位に付与する別途の回転付与機構を設けた構成を採用した。   In order to solve the above-described problems, the present invention converts the rotary motion of a rotor shaft of an electric motor or a rotary member to which rotation is transmitted from the rotor shaft into linear motion of an output member driven in the axial direction of rotation. In an electric linear actuator having a motion conversion mechanism, a rotation input and a rotation output are applied to a rotation portion of the rotor shaft or the rotation member, or a rotation transmission member that transmits rotation from the rotor shaft to the rotation member. A clutch for connecting and disconnecting; a connection / disconnection means for switching the clutch between a connected state and a disconnected state; an elastic member for storing the rotational input; a holding state for holding the rotational input stored in the elastic member; and the rotational output. Holding and releasing means for switching to a released state to be released, a connection cutoff actuator for operating the connection cutoff means, and operating the holding release means When the holding and releasing means is operated to the released state by operating the connection / blocking means to the connected state, the rotation input stored in the elastic member is applied to the rotating part as a rotation output. The structure which provided the separate rotation provision mechanism to adopt was adopted.

すなわち、ロータ軸もしくは回転部材、またはロータ軸から回転部材へ回転を伝達する回転伝達部材のいずれかの回転部位に、回転入力と回転出力を連結、遮断するクラッチと、クラッチを連結状態と遮断状態に切り替える連結遮断手段と、回転入力を溜める弾性部材と、弾性部材に溜められた回転入力を保持する保持状態と、回転出力として解放する解放状態に切り替える保持解放手段と、連結遮断手段を作動する連結遮断アクチュエータと、保持解放手段を作動する保持解放アクチュエータとからなり、連結遮断手段を連結状態に作動して保持解放手段を解放状態に作動したときに、弾性部材に溜められた回転入力を回転出力として回転部位に付与する別途の回転付与機構を設けることにより、この回転付与機構から回転部位に付与される回転を出力部材の直線運動に変換して、電動式ブレーキ装置に使用されるときにパーキングブレーキ機能を持たせることができるようにした。   That is, a clutch that connects and disconnects the rotation input and the rotation output to the rotation part of the rotor shaft or the rotation member, or the rotation transmission member that transmits the rotation from the rotor shaft to the rotation member, and the clutch is in a connected state and a disconnected state The connection blocking means for switching to, the elastic member for storing the rotation input, the holding state for holding the rotation input stored in the elastic member, the holding release means for switching to the release state for releasing as the rotation output, and the connection blocking means are operated. It consists of a connection breaking actuator and a holding release actuator that operates the holding release means. When the connection breaking means is activated and the holding release means is activated, the rotation input stored in the elastic member is rotated. By providing a separate rotation imparting mechanism that is applied to the rotating part as output, By converting rotation to linear motion of the output member, and to be able to have a parking brake function when used in the electric brake apparatus.

前記連結遮断アクチュエータと前記保持解放アクチュエータを電動式のアクチュエータとすることにより、駆動源を電源のみとすることができる。   By using the connection breaking actuator and the holding release actuator as electric actuators, the drive source can be a power source only.

前記連結遮断アクチュエータと前記保持解放アクチュエータとの少なくともいずれかの電動式のアクチュエータを作動する電気系統を、前記電動モータを作動する電気系統と別に設けることにより、電動モータのバッテリや制御回路等の電気系統にトラブルが生じても、前記電動式のアクチュエータを作動させることができ、前記パーキングブレーキ機能を非常用ブレーキとして使用することもできる。   By providing an electric system that operates at least one of the electric actuators of the connection breaking actuator and the holding release actuator separately from the electric system that operates the electric motor, an electric system such as a battery of an electric motor or a control circuit is provided. Even if a trouble occurs in the system, the electric actuator can be operated, and the parking brake function can be used as an emergency brake.

前記連結遮断アクチュエータと前記保持解放アクチュエータを共通のアクチュエータとすることにより、アクチュエータの個数を減らして、コンパクトに設計することができる。   By using the connection breaking actuator and the holding and releasing actuator as a common actuator, the number of actuators can be reduced and a compact design can be achieved.

前記クラッチは、内輪と外輪の間に配列された係合子としてのころを、前記内輪と外輪の間でくさび面に係合させるものとすることができる。   The clutch may engage a roller as an engaging element arranged between an inner ring and an outer ring with a wedge surface between the inner ring and the outer ring.

前記弾性部材は、ねじりコイルばね、定荷重ばねまたは渦巻きばねのいずれかとすることができる。   The elastic member can be any one of a torsion coil spring, a constant load spring, and a spiral spring.

前記保持解放アクチュエータをソレノイドとすることにより、保持解放アクチュエータの応答性を高くして、弾性部材に溜められた回転入力を迅速に解放し、パーキングブレーキ機能を速やかに作用させることができる。ソレノイドはリニヤ型でもロータリ型でもよい。   By using the solenoid as the holding and releasing actuator, the responsiveness of the holding and releasing actuator can be enhanced, the rotational input stored in the elastic member can be quickly released, and the parking brake function can be acted quickly. The solenoid may be a linear type or a rotary type.

前記ソレノイドを、通電を止めたときにも吸引力を保持する自己保持型のものとすることにより、弾性部材に溜められた回転入力を保持するときの通電を不要とし、電力を節約することができる。なお、自己保持型のソレノイドは、電磁石のほかに永久磁石を組み込み、電磁石でプランジャを吸引し、吸引後は永久磁石でプランジャを吸着保持するものである。   By making the solenoid self-holding type that retains the suction force even when the energization is stopped, it is possible to eliminate the need for energization when holding the rotational input stored in the elastic member and to save power. it can. The self-holding solenoid incorporates a permanent magnet in addition to an electromagnet, attracts the plunger with the electromagnet, and attracts and holds the plunger with the permanent magnet after the attraction.

前記別途の回転付与機構を前記ロータ軸から回転を伝達される回転部材の回転部位に設けることにより、回転付与機構が付与する回転出力を運動変換機構に直接伝達することができ、伝達エネルギロスを少なくすることができる。   By providing the separate rotation imparting mechanism at the rotation portion of the rotating member that is transmitted from the rotor shaft, the rotation output imparted by the rotation imparting mechanism can be directly transmitted to the motion conversion mechanism, and transmission energy loss can be reduced. Can be reduced.

前記運動変換機構を、前記ロータ軸またはロータ軸から回転を伝達される前記回転部材としての回転軸のいずれかの回転軸部材と、この回転軸部材の外径側でハウジングの内径面に内嵌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、これらの遊星ローラが前記回転軸部材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し、前記外輪部材の内径面に螺旋凸条を設け、前記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、前記外輪部材と前記キャリヤとを回転の軸線方向へ相対移動させ、前記回転軸部材の回転運動を前記出力部材としての前記外輪部材または前記キャリヤの直線運動に変換するものとすることにより、別途の減速機構を組み込むことなく大きな直線駆動力を確保することができる。   The motion conversion mechanism is fitted into the inner surface of the housing on the outer diameter side of the rotating shaft member and the outer surface of the rotating shaft member. A plurality of planetary rollers rotatably supported by the carrier are interposed between the outer ring member and the outer ring member so that these planetary rollers revolve while rotating around the rotating shaft member. A spiral ridge is provided on the inner diameter surface of the outer ring member, and a circumferential groove in which the spiral ridge is fitted on the outer diameter surface of the planetary roller at the same pitch as the spiral ridge, or a lead at the same pitch as the spiral ridge. A spiral groove in which a spiral protrusion is fitted at a different angle is provided, the outer ring member and the carrier are relatively moved in the rotational axis direction, and the rotational movement of the rotary shaft member is the outer ring member as the output member or The By shall be converted into linear motion of Ya, it is possible to ensure a large linear driving force without incorporating a separate speed reduction mechanism.

また、本発明は、電動モータの回転運動を出力部材の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、前記別途の回転付与機構で付与される回転を前記出力部材の直線運動に変換する構成を採用することにより、回転付与機構から回転部位に付与される回転を出力部材の直線運動に変換して、パーキングブレーキ機能を持たせることができるようにした。   The present invention further includes an electric linear actuator that linearly drives the brake member by converting the rotational motion of the electric motor into a linear motion of the output member, and that electrically presses the brake member that is linearly driven against the member to be braked. In the brake system, any one of the electric linear actuators described above is used as the electric linear actuator, and the rotation applied by the separate rotation applying mechanism is converted into the linear motion of the output member. Thus, the rotation imparted from the rotation imparting mechanism to the rotation part is converted into the linear motion of the output member so that the parking brake function can be provided.

本発明の電動式直動アクチュエータは、ロータ軸もしくは回転部材、またはロータ軸から回転部材へ回転を伝達する回転伝達部材のいずれかの回転部位に、回転入力と回転出力を連結、遮断するクラッチと、クラッチを連結状態と遮断状態に切り替える連結遮断手段と、回転入力を溜める弾性部材と、弾性部材に溜められた回転入力を保持する保持状態と、回転出力として解放する解放状態に切り替える保持解放手段と、連結遮断手段を作動する連結遮断アクチュエータと、保持解放手段を作動する保持解放アクチュエータとからなり、連結遮断手段を連結状態に作動して保持解放手段を解放状態に作動したときに、弾性部材に溜められた回転入力を回転出力として回転部位に付与する別途の回転付与機構を設けたので、この回転付与機構から回転部位に付与される回転を出力部材の直線運動に変換して、電動式ブレーキ装置に使用されるときにパーキングブレーキ機能を持たせることができる。   The electric linear actuator of the present invention includes a clutch that connects and disconnects a rotation input and a rotation output to a rotation part of a rotor shaft or a rotation member, or a rotation transmission member that transmits rotation from the rotor shaft to the rotation member. A connection / disconnection means for switching the clutch between a connected state and a disengaged state, an elastic member for accumulating the rotational input, a holding state for retaining the rotational input stored in the elastic member, and a holding / releasing means for switching to a released state for releasing as the rotational output And an elastic member when the connecting / blocking means is operated to the connected state and the holding / release means is operated to the released state. Since a separate rotation imparting mechanism is provided to impart the rotational input stored in the rotary part to the rotational part as the rotational output. It converts the rotation imparted to the rotary portion into a linear motion of the output member, it is possible to have a parking brake function when used in the electric brake apparatus.

また、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いずれかの電動式直動アクチュエータを用い、別途の回転付与機構で付与される回転を出力部材の直線運動に変換するようにしたので、パーキングブレーキ機能を持たせることができる。   Moreover, the electric brake device of the present invention uses any one of the electric linear actuators described above as the electric linear actuator, and converts rotation applied by a separate rotation applying mechanism into linear motion of the output member. Therefore, it is possible to provide a parking brake function.

電動式直動アクチュエータの実施形態を示す縦断面図A longitudinal sectional view showing an embodiment of an electric linear actuator 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), (b) is a front view which shows the spiral protrusion of the outer ring member of FIG. 1, and the spiral groove of the planetary roller, respectively. 図1の回転付与機構を拡大して示す縦断面図1 is an enlarged longitudinal sectional view showing the rotation imparting mechanism of FIG. 図5のVI−VI線に沿った断面図Sectional view along line VI-VI in FIG. 図5のVII−VII線に沿った断面図Sectional drawing along the VII-VII line of FIG. (a)、(b)は、それぞれ図5の連結遮断レバーを遮断状態、保持解放レバーを保持状態としたときのVa−Va線とVb−Vb線に沿った断面図FIGS. 5A and 5B are cross-sectional views taken along lines Va-Va and Vb-Vb, respectively, when the connection cut-off lever of FIG. 5 is cut off and the release lever is held. 図8(a)、(b)の状態での図6のクラッチを示す断面図Sectional drawing which shows the clutch of FIG. 6 in the state of FIG. 8 (a), (b) (a)、(b)は、それぞれ図5の連結遮断レバーを連結状態、保持解放レバーを解放状態としたときのVa−Va線とVb−Vb線に沿った断面図(A), (b) is sectional drawing along the Va-Va line and Vb-Vb line when the connection interruption | blocking lever of FIG. 5 is each in a connection state and a holding release lever is in a release state. 図10(a)、(b)の状態での図6のクラッチを示す断面図Sectional drawing which shows the clutch of FIG. 6 in the state of FIG. 10 (a), (b) 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.

以下、図面に基づき、本発明の実施形態を説明する。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、ハウジング1の円筒部1aの一端側に片側へ張り出すフランジ1bが設けられ、このフランジ1bに電動モータ2が円筒部1aと平行に取り付けられている。電動モータ2のロータ軸2aの回転は、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、円筒部1aの内径面に内嵌された外輪部材5と回転軸4との間に介在する4個の遊星ローラ6が、キャリヤ7に回転自在に支持されて、回転軸4の回転に伴ってその周りを自転しながら公転し、後述する外輪部材5の螺旋凸条5aと遊星ローラ6の螺旋溝6aとの係合によって、遊星ローラ6を支持するキャリヤ7と外輪部材5とが軸線方向へ相対移動する運動変換機構を備えている。この実施形態では、キャリヤ7の軸方向移動が規制され、直線運動する外輪部材5が出力部材として被駆動物を直線駆動するようになっている。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 3, the electric linear actuator is provided with a flange 1b projecting to one end of a cylindrical portion 1a of the housing 1, and the electric motor 2 is connected to the cylindrical portion 1a on the flange 1b. Installed in parallel. The rotation of the rotor shaft 2a of the electric motor 2 is transmitted to the rotation shaft 4 disposed at the center of the cylindrical portion 1a by gears 3a, 3b, 3c, and the outer ring member 5 fitted inside the inner diameter surface of the cylindrical portion 1a. Four planetary rollers 6 interposed between the rotary shaft 4 are rotatably supported by the carrier 7 and revolve around the rotary shaft 4 as the rotary shaft 4 rotates. A movement converting mechanism is provided in which the carrier 7 supporting the planetary roller 6 and the outer ring member 5 are moved relative to each other in the axial direction by the engagement of the spiral ridge 5a with the spiral groove 6a of the planetary roller 6. In this embodiment, the movement of the carrier 7 in the axial direction is restricted, and the outer ring member 5 that moves linearly drives the driven object linearly as an output member.

前記ハウジング1のフランジ1bを設けた側には蓋8が取り付けられ、蓋8で覆われた空間に、歯車3a、3b、3cが軸方向同一断面内で噛み合うように配設されるとともに、後述する回転付与機構30が設けられている。歯車3aはロータ軸2aに、歯車3cは回転軸4に取り付けられ、これらと噛み合う中間歯車3bは、フランジ1bと蓋8に差し渡された軸ピン9に玉軸受10で支持されている。   A lid 8 is attached to the side of the housing 1 on which the flange 1b is provided, and gears 3a, 3b, 3c are arranged in a space covered by the lid 8 so as to mesh with each other within the same cross section in the axial direction. A rotation imparting mechanism 30 is provided. The gear 3 a is attached to the rotor shaft 2 a, and the gear 3 c is attached to the rotating shaft 4. The intermediate gear 3 b that meshes with these is supported by a ball bearing 10 on a shaft pin 9 that is passed between the flange 1 b and the lid 8.

前記回転軸4にロータ軸2aからの回転を伝達する歯車3cと、回転軸4に転接する遊星ローラ6との間には、回転軸4を支持するための軸受固定部材11が、ハウジング1の円筒部1aの内径面に止め輪12で固定されている。軸受固定部材11は、円筒部1aの内径面に固定された円環部11aと、その内径側で遊星ローラ6側へ張り出す円筒部11bとからなり、円環部11aと円筒部11bの内径面に、回転軸4を回転自在に支持する2つのアンギュラ玉軸受13a、13bが、互いに背面を向けるように軸方向で離間されて取り付けられている。   A bearing fixing member 11 for supporting the rotary shaft 4 is provided between the gear 3 c that transmits the rotation from the rotor shaft 2 a to the rotary shaft 4 and the planetary roller 6 that is in rolling contact with the rotary shaft 4. A retaining ring 12 is fixed to the inner diameter surface of the cylindrical portion 1a. The bearing fixing member 11 includes an annular portion 11a fixed to the inner diameter surface of the cylindrical portion 1a, and a cylindrical portion 11b that protrudes toward the planetary roller 6 on the inner diameter side, and the inner diameters of the annular portion 11a and the cylindrical portion 11b. Two angular ball bearings 13a and 13b that rotatably support the rotating shaft 4 are attached to the surface so as to be separated from each other in the axial direction so that the back surfaces thereof face each other.

前記キャリヤ7は、回転軸4にそれぞれすべり軸受14a、14bでスライド可能かつ相対回転可能に外嵌されたキャリヤ本体7aおよび支持板7bと、離間したキャリヤ本体7aと支持板7bに両端部を支持され、遊星ローラ6を回転自在に支持する支持ピン7cと、支持板7bをキャリヤ本体7aに位相合わせして連結する複数の連結棒7dとからなり、各連結棒7dの両端部はボルト7eでキャリヤ本体7aと支持板7bに連結されている。各支持ピン7cは、その両端側をキャリヤ本体7aと支持板7bとに設けられた半径方向の長孔15に、円周方向への移動を規制され、半径方向への移動を許容されて取り付けられている。   The carrier 7 is supported at both ends by a carrier body 7a and a support plate 7b which are externally fitted to the rotary shaft 4 so as to be slidable and relatively rotatable by slide bearings 14a and 14b, respectively. The support pin 7c that rotatably supports the planetary roller 6 and a plurality of connecting rods 7d that connect the support plate 7b in phase with the carrier body 7a. Both ends of each connecting rod 7d are bolts 7e. It is connected to the carrier body 7a and the support plate 7b. Each support pin 7c is attached at both ends thereof to a radial slot 15 provided in the carrier body 7a and the support plate 7b so that movement in the circumferential direction is restricted and movement in the radial direction is allowed. It has been.

前記各支持ピン7cの両端部の外径面には溝16が設けられ、円周方向の一部を切り欠いたばね鋼で形成された縮径リングばね17が、各溝16に嵌め込まれて、各支持ピン7cを包絡するように巻回されて装着されている。したがって、各支持ピン7cに回転自在に支持された各遊星ローラ6が回転軸4の外径面に押圧付勢され、回転軸4の回転トルクが安定して各遊星ローラ6に伝達される。   Grooves 16 are provided on the outer diameter surfaces of both end portions of the support pins 7c, and reduced diameter ring springs 17 formed of spring steel with a part cut in the circumferential direction are fitted in the grooves 16, Each support pin 7c is wound and attached so as to envelop. Therefore, each planetary roller 6 rotatably supported by each support pin 7c is pressed against the outer diameter surface of the rotating shaft 4, and the rotational torque of the rotating shaft 4 is stably transmitted to each planetary roller 6.

前記各遊星ローラ6は、内径面に装着された針状ころ軸受18でキャリヤ7の支持ピン7cに回転自在に支持され、その自転をスラストころ軸受19でキャリヤ本体7aに支持されている。また、隣接する各遊星ローラ6間には、両側の遊星ローラ6の外径面に摺接してグリースを塗布する扇形状の潤滑剤塗布部材20が、キャリヤ7の連結棒7dと外輪部材5の内径面との間に保持されている。   Each planetary roller 6 is rotatably supported on a support pin 7c of a carrier 7 by a needle roller bearing 18 mounted on an inner diameter surface, and its rotation is supported by a carrier body 7a by a thrust roller bearing 19. Further, between the adjacent planetary rollers 6, a fan-shaped lubricant application member 20 that slidably contacts the outer diameter surfaces of the planetary rollers 6 on both sides and applies grease is provided between the connecting rod 7 d of the carrier 7 and the outer ring member 5. It is held between the inner diameter surface.

前記キャリヤ7のキャリヤ本体7aは、サポート部材7fを介してスラストころ軸受21で、軸受固定部材11の円環部11aに回転自在に支持されている。また、遊星ローラ6に対して反対側の支持板7bは、すべり軸受22を介して止め輪23で回転軸4に抜け止めされており、キャリヤ7の軸方向への移動が規制されている。   The carrier body 7a of the carrier 7 is rotatably supported by the annular portion 11a of the bearing fixing member 11 with a thrust roller bearing 21 via a support member 7f. Further, the support plate 7b on the opposite side to the planetary roller 6 is secured to the rotating shaft 4 by a retaining ring 23 via a slide bearing 22, and the movement of the carrier 7 in the axial direction is restricted.

前記出力部材としての外輪部材5は、ハウジング1の円筒部1aにスライド可能に内嵌され、被駆動物に連結されて回り止めするキー24が前端面に設けられている。また、外輪部材5の外径側は、円筒部1aとの間を環状のシール部材25でシールされ、外輪部材5の内径側は、キャリヤ7の支持板7bに内嵌された回転軸4の端を覆うように、膜状のシール部材26でシールされている。   The outer ring member 5 as the output member is slidably fitted in the cylindrical portion 1a of the housing 1, and a key 24 is provided on the front end face so as to be connected to the driven object and prevent rotation. Further, the outer diameter side of the outer ring member 5 is sealed between the cylindrical portion 1 a by an annular seal member 25, and the inner diameter side of the outer ring member 5 is the rotation shaft 4 fitted in the support plate 7 b of the carrier 7. It is sealed with a film-like seal member 26 so as to cover the end.

図4(a)、(b)に示すように、前記外輪部材5の内径面には2条の螺旋凸条5aが設けられ、遊星ローラ6の外径面には、螺旋凸条5aが嵌まり込み、螺旋凸条5aと同一ピッチでリード角の異なる1条の螺旋溝6aが設けられている。これらの螺旋凸条5aと螺旋溝6aの係合によって、回転軸4の周りを自転しながら公転する遊星ローラ6が、螺旋凸条5aと螺旋溝6aとのリード角の差で、外輪部材5と軸方向へ相対移動する。なお、外輪部材5の螺旋凸条5aを2条の多条螺旋としたのは、遊星ローラ6の螺旋溝6a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5aは1条のものとしてもよい。また、遊星ローラ6の螺旋溝6aは、螺旋凸条5aと同一ピッチの周方向溝とすることもできる。   As shown in FIGS. 4A and 4B, two spiral ridges 5 a are provided on the inner diameter surface of the outer ring member 5, and the spiral ridges 5 a are fitted on the outer diameter surface of the planetary roller 6. A single spiral groove 6a having a different lead angle is provided at the same pitch as the spiral protrusion 5a. Due to the engagement of the spiral ridges 5a and the spiral grooves 6a, the planetary roller 6 that revolves while rotating around the rotation shaft 4 has a difference in the lead angle between the spiral ridges 5a and the spiral grooves 6a. And move relative to the axis. The reason why the spiral ridge 5a of the outer ring member 5 is a two-row spiral is to increase the degree of freedom in setting the difference in the lead angle with the spiral groove 6a of the planetary roller 6, and the spiral ridge 5a. May be one. Further, the spiral groove 6a of the planetary roller 6 can be a circumferential groove having the same pitch as the spiral ridge 5a.

図5に示すように、前記回転付与機構30は、蓋8の内面側に設けられた円筒部8aに挿入された回転軸4の延長部4aに、後述する回転入力と回転出力を連結、遮断するクラッチ31と、回転入力を溜める弾性部材としてのねじりコイルばね32と、クラッチ31を連結状態と遮断状態に切り替える連結遮断手段を構成する連結遮断レバー33aと、ねじりコイルばね32に溜められた回転入力を保持する保持状態と、回転出力として解放する解放状態に切り替える保持解放手段を構成する保持解放レバー33bと、連結遮断レバー33aを作動する連結遮断アクチュエータと、保持解放レバー33bを作動する保持解放アクチュエータを兼ねたリニヤ型のソレノイド34とからなる。   As shown in FIG. 5, the rotation applying mechanism 30 connects and interrupts a rotation input and a rotation output, which will be described later, to an extension portion 4 a of the rotation shaft 4 inserted in a cylindrical portion 8 a provided on the inner surface side of the lid 8. The clutch 31 to be rotated, the torsion coil spring 32 as an elastic member for accumulating the rotation input, the connection cut-off lever 33a constituting the connection cut-off means for switching the clutch 31 between the connected state and the cut-off state, and the rotation stored in the torsion coil spring 32 Holding / releasing lever 33b constituting holding / releasing means for switching to a holding state for holding an input and a releasing state for releasing as a rotation output, a coupling / blocking actuator for operating the coupling / blocking lever 33a, and a holding / release for operating the holding / release lever 33b It consists of a linear solenoid 34 that also serves as an actuator.

前記ソレノイド34は円筒部8aの外側に固定され、電動モータ2とは別の電気系統で作動されるようになっている。また、ソレノイド34に連結された連結遮断レバー33aと保持解放レバー33bは、円筒部8aに設けられた切欠き部8bから円筒部8aの中に挿入されている。   The solenoid 34 is fixed to the outside of the cylindrical portion 8 a and is operated by an electric system different from the electric motor 2. Further, the connection blocking lever 33a and the holding release lever 33b connected to the solenoid 34 are inserted into the cylindrical portion 8a from the notch portion 8b provided in the cylindrical portion 8a.

図5および図6に示すように、前記クラッチ31は、円筒部8aの内径面に軸受35で回転自在に支持された外輪36と、内輪となる回転軸4の延長部4aとの間に、係合子としてのころ37を保持器38で保持して、外輪36の内径面に設けられたカム面36aに係合させるものであり、外輪36に取り付けられたセンタリングばね39によって、各ころ37がカム面36aの逃げる中央位置に来るように保持器38が付勢されている。   As shown in FIGS. 5 and 6, the clutch 31 is provided between an outer ring 36 rotatably supported by a bearing 35 on the inner diameter surface of the cylindrical part 8 a and an extension part 4 a of the rotary shaft 4 serving as an inner ring. A roller 37 as an engaging element is held by a cage 38 and is engaged with a cam surface 36a provided on the inner diameter surface of the outer ring 36, and each roller 37 is moved by a centering spring 39 attached to the outer ring 36. The cage 38 is urged so as to come to the center position where the cam surface 36a escapes.

前記外輪36の外端側には、保持器38の外端側への移動を規制する内向きの鍔36bが設けられ、内端側には、後述するように保持解放レバー33bが噛み合うラチェット歯車36cが設けられている。また、保持器38の内端側には、後述するように連結遮断レバー33aが押圧される大径部38aが設けられ、この大径部38aがすべり軸受40を介して、蓋8の円筒部8aの内端部に取り付けられた止め輪41によって、内端側への移動を規制されている。   An inward flange 36b for restricting movement of the retainer 38 to the outer end side is provided on the outer end side of the outer ring 36, and a ratchet gear with which a holding release lever 33b meshes with the inner end side as will be described later. 36c is provided. Further, on the inner end side of the retainer 38, a large-diameter portion 38a to which the connection blocking lever 33a is pressed is provided as will be described later, and the large-diameter portion 38a is connected to the cylindrical portion of the lid 8 via the slide bearing 40. Movement to the inner end side is restricted by a retaining ring 41 attached to the inner end portion of 8a.

図7に示すように、前記ねじりコイルばね32は、一端側が蓋8の円筒部8aに固定され、他端側がクラッチ31の外輪36に取り付けられており、外輪36が時計回りに回転すると回転入力が溜められるようになっている。   As shown in FIG. 7, the torsion coil spring 32 has one end fixed to the cylindrical portion 8a of the lid 8 and the other end attached to the outer ring 36 of the clutch 31. When the outer ring 36 rotates clockwise, the rotation input Can be accumulated.

図5および図8(a)、(b)に示すように、前記連結遮断レバー33aと保持解放レバー33bは、回転自在な支持軸42に取り付けられ、保持解放レバー33bの基端がソレノイド34のプランジャ34aの延長部材34bにピン34cで連結されており、ソレノイド34を作動することにより、連結遮断レバー33aと保持解放レバー33bが支持軸42の回りに一体で回動するようになっている。図示は省略するが、ソレノイド34は、電磁石のほかに永久磁石を組み込んだ自己保持型のものとされ、プランジャ34aを吸引した状態で通電を止めても、プランジャ34aが永久磁石で吸着保持されるようになっている。   As shown in FIGS. 5 and 8A and 8B, the connection blocking lever 33a and the holding / release lever 33b are attached to a rotatable support shaft 42, and the base end of the holding / release lever 33b is the solenoid 34. The extension member 34b of the plunger 34a is connected by a pin 34c, and the solenoid 34 is operated so that the connection blocking lever 33a and the holding release lever 33b rotate integrally around the support shaft 42. Although illustration is omitted, the solenoid 34 is a self-holding type in which a permanent magnet is incorporated in addition to an electromagnet, and the plunger 34a is attracted and held by the permanent magnet even when the energization is stopped while the plunger 34a is attracted. It is like that.

図8(a)、(b)は、前記ソレノイド34のプランジャ34aを吸引して、連結遮断レバー33aを遮断状態、保持解放レバー33bを保持状態とした場合であり、連結遮断レバー33aが保持器38の大径部38aから離反するように回動するとともに、保持解放レバー33bが外輪36のラチェット歯車36cと噛み合うように回動している。図8(b)の保持解放レバー33bは左側からラチェット歯車36cと噛み合っており、ラチェット歯車36cは反時計回りの回転を拘束され、時計回りには回転可能になっている。したがって、外輪36の時計回りの回転によってねじりコイルばね32に溜められた回転入力を保持することができる。   FIGS. 8A and 8B show the case where the plunger 34a of the solenoid 34 is sucked so that the connection cut-off lever 33a is cut off and the holding release lever 33b is held, and the connection cut-off lever 33a is held in the cage. The holding and releasing lever 33b is rotated so as to mesh with the ratchet gear 36c of the outer ring 36. The holding / release lever 33b shown in FIG. 8B meshes with the ratchet gear 36c from the left side, and the ratchet gear 36c is restricted from rotating counterclockwise and can rotate clockwise. Accordingly, the rotational input accumulated in the torsion coil spring 32 by the clockwise rotation of the outer ring 36 can be held.

図9に示すように、前記連結遮断レバー33aが遮断状態のときは、クラッチ31の保持器38が連結遮断レバー33aで拘束されないので、センタリングばね39によってころ37がカム面36aの中央位置に来るように付勢され、ころ37がカム面36aと係合せずに、クラッチ31の内輪としての回転軸4の延長部4aのみが回転する。この実施形態では、回転軸4が反時計回りに回転するときに、出力部材としての外輪部材5が前進するようになっており、電動モータ2によって回転軸4を反時計回りに駆動すると、クラッチ31が切の状態で回転軸4のみが回転し、電動式ブレーキ装置等の被駆動部材をブレーキが作動するように押圧する。   As shown in FIG. 9, when the coupling / blocking lever 33a is in the blocked state, the retainer 38 of the clutch 31 is not restrained by the coupling / blocking lever 33a, so that the roller 37 comes to the center position of the cam surface 36a by the centering spring 39. The roller 37 is not engaged with the cam surface 36a, and only the extension 4a of the rotating shaft 4 as the inner ring of the clutch 31 rotates. In this embodiment, when the rotating shaft 4 rotates counterclockwise, the outer ring member 5 as an output member moves forward, and when the rotating shaft 4 is driven counterclockwise by the electric motor 2, the clutch In the state where 31 is off, only the rotating shaft 4 rotates, and a driven member such as an electric brake device is pressed so that the brake operates.

図10(a)、(b)は、前記ソレノイド34のプランジャ34aを押し出して、連結遮断レバー33aを連結状態、保持解放レバー33bを解放状態とした場合であり、連結遮断レバー33aが保持器38の大径部38aの外径面を押圧するように回動するとともに、保持解放レバー33bが外輪36のラチェット歯車36cから逃げるように回動して、前記ねじりコイルばね32に外輪36の時計回りの回転で溜められた回転入力が、外輪36の反時計回りの回転出力として解放されるようになっている。   FIGS. 10A and 10B show the case where the plunger 34a of the solenoid 34 is pushed out so that the connection blocking lever 33a is in the connected state and the holding release lever 33b is in the released state. And the holding and releasing lever 33b is rotated so as to escape from the ratchet gear 36c of the outer ring 36, so that the torsion coil spring 32 is rotated clockwise by the outer ring 36. The rotation input accumulated by the rotation of the outer ring 36 is released as a counterclockwise rotation output of the outer ring 36.

図11に示すように、前記連結遮断レバー33aが連結状態のときは、クラッチ31の保持器38が連結遮断レバー33aで拘束されるので、外輪36が回転出力を解放するように反時計回りに回転すると、保持器38がセンタリングばね39の付勢に打ち勝って、外輪36に対して時計回りに相対回転し、ころ37がカム面36aと係合してクラッチ31が入となる。したがって、回転出力を解放する外輪36の反時計回りの回転が回転軸4の延長部4aに伝達され、出力部材としての外輪部材5が前進して被駆動部材を押圧し、電動式ブレーキ装置に使用されたときにパーキングブレーキ機能を発揮する。   As shown in FIG. 11, when the connection blocking lever 33a is in the connected state, the retainer 38 of the clutch 31 is restrained by the connection blocking lever 33a, so that the outer ring 36 is rotated counterclockwise so as to release the rotation output. When rotating, the cage 38 overcomes the bias of the centering spring 39 and rotates relative to the outer ring 36 in the clockwise direction, and the roller 37 engages with the cam surface 36a and the clutch 31 is engaged. Therefore, the counterclockwise rotation of the outer ring 36 that releases the rotational output is transmitted to the extension 4a of the rotating shaft 4, and the outer ring member 5 as the output member moves forward to press the driven member, and the electric brake device The parking brake function is demonstrated when it is used.

前記ねじりコイルばね32に回転入力を溜めるときは、図11に示したように、クラッチ31が入の状態で、図8(a)、(b)に示したように、連結遮断レバー33aを遮断状態、保持解放レバー33bを保持状態とし、回転軸4を電動モータ2で時計回りに回転駆動することにより、ラチェット歯車36cに保持解放レバー33bを噛み合わせた状態で外輪36を時計回りに回転させて、ねじりコイルばね32に回転入力を溜めることができる。溜められた回転入力は、保持解放レバー33bによるラチェット歯車36cの反時計回りの係止によって保持される。なお、入状態となったクラッチ31は、つぎに回転軸4を時計回りに回転駆動するときに、ころ37がカム面36aから離脱して切状態となる。   When accumulating rotational input in the torsion coil spring 32, as shown in FIG. 11, with the clutch 31 in the engaged state, as shown in FIGS. 8 (a) and 8 (b), the connection cutoff lever 33a is cut off. In this state, the holding / release lever 33b is held and the rotating shaft 4 is rotated clockwise by the electric motor 2 to rotate the outer ring 36 clockwise with the holding / release lever 33b engaged with the ratchet gear 36c. Thus, rotational input can be stored in the torsion coil spring 32. The accumulated rotational input is held by the counterclockwise locking of the ratchet gear 36c by the holding / release lever 33b. In the clutch 31 that is in the engaged state, the roller 37 is detached from the cam surface 36a when the rotation shaft 4 is next driven to rotate in the clockwise direction, and the clutch 31 is in the disengaged state.

図12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51の内部で被制動部材としてのディスクロータ52の両側に、ブレーキ部材としてのブレーキパッド53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51に電動式直動アクチュエータのハウジング1が固定され、出力部材としての外輪部材5が左方へ直線運動するときに、被駆動物としてのブレーキパッド53をディスクロータ52に押圧するように直線駆動する。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いる。   FIG. 12 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 53 as brake members are arranged oppositely on both sides of a disc rotor 52 as a braked member inside the caliper body 51, and the electric linear actuator is connected to the caliper body 51. When the outer ring member 5 as the output member linearly moves to the left, the brake pad 53 as the driven object is linearly driven so as to press the disk rotor 52. In this figure, the electric linear actuator is shown in a cross section orthogonal to the cross section shown in FIG.

上述した実施形態では、回転付与機構を電動モータのロータ軸から回転を伝達される回転軸の回転部位に設けたが、回転付与機構はロータ軸やロータ軸の回転を回転軸に伝達する歯車等の回転伝達部材の回転部位に設けることもできる。   In the above-described embodiment, the rotation imparting mechanism is provided at the rotation portion of the rotation shaft to which the rotation is transmitted from the rotor shaft of the electric motor, but the rotation imparting mechanism is a gear that transmits the rotation of the rotor shaft or the rotor shaft to the rotation shaft. It can also be provided at the rotation part of the rotation transmission member.

上述した実施形態では、回転付与機構の連結遮断アクチュエータと保持解放アクチュエータを兼用のリニヤ型のソレノイドとしたが、これらのアクチュエータはロータリ型のソレノイドや他の電動式等のアクチュエータとすることもでき、両者のアクチュエータを個別のものとすることもできる。また、回転入力を溜める弾性部材をねじりコイルばねとしたが、この弾性部材は、定荷重ばねや渦巻きばね等とすることもできる。   In the embodiment described above, a linear solenoid that serves both as a connection cutoff actuator and a holding release actuator of the rotation imparting mechanism is used, but these actuators can also be a rotary solenoid or other electric actuator, Both actuators may be separate. Moreover, although the elastic member which accumulate | stores rotational input was used as the torsion coil spring, this elastic member can also be used as a constant load spring, a spiral spring, etc.

上述した実施形態では、電動モータの回転運動を直線運動に変換する運動変換機構を、電動モータから回転を伝達される回転軸と外輪部材との間に遊星ローラを介在させ、回転軸の回転運動を外輪部材の直線運動に変換するものとしたが、この運動変換機構は、滑りねじ機構、ボールねじ機構、ボールランプ機構等を用いたものとすることもできる。   In the embodiment described above, the motion conversion mechanism that converts the rotational motion of the electric motor into a linear motion has a planetary roller interposed between the rotating shaft to which the rotation is transmitted from the electric motor and the outer ring member, and the rotating motion of the rotating shaft. Is converted into a linear motion of the outer ring member, but the motion conversion mechanism may be a sliding screw mechanism, a ball screw mechanism, a ball ramp mechanism, or the like.

上述した実施形態では、運動変換機構の相対移動するキャリヤと外輪部材のうち、キャリヤの軸方向移動を規制して、外輪部材を直線運動する出力部材としたが、外輪部材の軸方向移動を規制して、キャリヤを直線運動する出力部材とすることもできる。また、外輪部材の内径面の螺旋凸条を一体に形成したが、外輪部材の内径面に螺旋溝を設け、この螺旋溝に嵌め込まれた別体の条部材で螺旋凸条を形成することもできる。   In the embodiment described above, of the carrier and the outer ring member that move relative to each other in the motion conversion mechanism, the movement of the carrier in the axial direction is restricted, and the outer ring member is the output member that moves linearly. However, the movement of the outer ring member in the axial direction is restricted. Thus, the carrier can be an output member that linearly moves. In addition, the spiral ridge on the inner diameter surface of the outer ring member is integrally formed, but a spiral groove is provided on the inner diameter surface of the outer ring member, and the spiral ridge may be formed by a separate stripe member fitted in the spiral groove. it can.

1 ハウジング
1a 円筒部
1b フランジ
2 電動モータ
2a ロータ軸
3a、3b、3c 歯車
4 回転軸
5 外輪部材
5a 螺旋凸条
6 遊星ローラ
6a 螺旋溝
7 キャリヤ
7a キャリヤ本体
7b 支持板
7c 支持ピン
7d 連結棒
7e ボルト
7f サポート部材
8 蓋
8a 円筒部
8b 切欠き部
9 軸ピン
10 玉軸受
11 軸受固定部材
11a 円環部
11b 円筒部
12 止め輪
13a、13b アンギュラ玉軸受
14a、14b すべり軸受
15 長孔
16 溝
17 縮径リングばね
18 針状ころ軸受
19 スラストころ軸受
20 潤滑剤塗布部材
21 スラストころ軸受
22 すべり軸受
23 止め輪
24 キー
25、26 シール部材
30 回転付与機構
31 クラッチ
32 ねじりコイルばね
33a 連結遮断レバー
33b 保持解放レバー
34 ソレノイド
34a プランジャ
34b 延長部材
34c ピン
35 軸受
36 外輪
36a カム面
36b 鍔
36c ラチェット歯車
37 ころ
38 保持器
38a 大径部
39 センタリングばね
40 すべり軸受
41 止め輪
42 支持軸
51 キャリパボディ
52 ディスクロータ
53 ブレーキパッド
DESCRIPTION OF SYMBOLS 1 Housing 1a Cylindrical part 1b Flange 2 Electric motor 2a Rotor shaft 3a, 3b, 3c Gear 4 Rotating shaft 5 Outer ring member 5a Spiral protrusion 6 Planetary roller 6a Spiral groove 7 Carrier 7a Carrier body 7b Support plate 7c Support pin 7d Connecting rod 7e Bolt 7f Support member 8 Lid 8a Cylindrical part 8b Notch part 9 Shaft pin 10 Ball bearing 11 Bearing fixing member 11a Ring part 11b Cylindrical part 12 Retaining ring 13a, 13b Angular ball bearings 14a, 14b Slide bearing 15 Long hole 16 Groove 17 Reduced ring spring 18 Needle roller bearing 19 Thrust roller bearing 20 Lubricant application member 21 Thrust roller bearing 22 Slide bearing 23 Retaining ring 24 Keys 25 and 26 Seal member 30 Rotating mechanism 31 Clutch 32 Torsion coil spring 33a Connection blocking lever 33b Holding release lever 34 Solenoid 34a Plan Catcher 34b extending member 34c pin 35 bearing 36 the outer race 36a cam surface 36b flange 36c ratchet wheel 37 roller 38 retainer 38a large diameter portion 39 centering spring 40 sliding bearing 41 retaining ring 42 supporting shaft 51 caliper body 52 disc rotor 53 brake pads

Claims (11)

電動モータのロータ軸またはロータ軸から回転を伝達される回転部材の回転運動を、回転の軸線方向に駆動される出力部材の直線運動に変換する運動変換機構を備えた電動式直動アクチュエータにおいて、前記ロータ軸もしくは前記回転部材、または前記ロータ軸から回転部材へ回転を伝達する回転伝達部材のいずれかの回転部位に、回転入力と回転出力を連結、遮断するクラッチと、前記クラッチを連結状態と遮断状態に切り替える連結遮断手段と、前記回転入力を溜める弾性部材と、前記弾性部材に溜められた回転入力を保持する保持状態と、前記回転出力として解放する解放状態に切り替える保持解放手段と、前記連結遮断手段を作動する連結遮断アクチュエータと、前記保持解放手段を作動する保持解放アクチュエータとからなり、前記連結遮断手段を連結状態に作動して前記保持解放手段を解放状態に作動したときに、前記弾性部材に溜められた回転入力を回転出力として前記回転部位に付与する別途の回転付与機構を設けたことを特徴とする電動式直動アクチュエータ。   In the electric linear actuator provided with a motion conversion mechanism for converting the rotational motion of the rotor shaft of the electric motor or the rotation member transmitted from the rotor shaft to the linear motion of the output member driven in the axial direction of the rotation, A clutch that connects and disconnects a rotation input and a rotation output to a rotation portion of either the rotor shaft or the rotation member, or a rotation transmission member that transmits rotation from the rotor shaft to the rotation member, and the clutch is in a connected state. A connection blocking means for switching to a blocking state, an elastic member for storing the rotation input, a holding state for holding the rotation input stored in the elastic member, a holding release means for switching to a release state for releasing as the rotation output, A connection breaking actuator that operates the connection blocking means, and a holding release actuator that operates the holding release means, Provided with a separate rotation imparting mechanism for imparting a rotational input stored in the elastic member as a rotational output to the rotational portion when the connection blocking means is operated in the connected state and the holding and releasing means is operated in the released state. An electric linear actuator characterized by that. 前記連結遮断アクチュエータと前記保持解放アクチュエータを電動式のアクチュエータとした請求項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 connection breaking actuator and the holding / release actuator are electric actuators. 前記連結遮断アクチュエータと前記保持解放アクチュエータとの少なくともいずれかの電動式のアクチュエータを作動する電気系統を、前記電動モータを作動する電気系統と別に設けた請求項2に記載の電動式直動アクチュエータ。   The electric linear motion actuator according to claim 2, wherein an electric system that operates at least one of the electric actuator for operating the electric motor is provided separately from the electric system that operates the electric motor. 前記連結遮断アクチュエータと前記保持解放アクチュエータを共通のアクチュエータとした請求項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。   The electric linear actuator according to any one of claims 1 to 3, wherein the connection breaking actuator and the holding release actuator are a common actuator. 前記クラッチを、内輪と外輪の間に配列された係合子としてのころを、前記内輪と外輪の間でくさび面に係合させるものとした請求項1乃至4のいずれかに記載の電動式直動アクチュエータ。   5. The electric linear motor according to claim 1, wherein a roller as an engagement element arranged between the inner ring and the outer ring is engaged with a wedge surface between the inner ring and the outer ring. Moving actuator. 前記弾性部材を、ねじりコイルばね、定荷重ばねまたは渦巻きばねのいずれかとした請求項1乃至5のいずれかに記載の電動式直動アクチュエータ。   The electric linear actuator according to any one of claims 1 to 5, wherein the elastic member is any one of a torsion coil spring, a constant load spring, and a spiral spring. 前記保持解放アクチュエータをソレノイドとした請求項1乃至6のいずれかに記載の電動式直動アクチュエータ。   The electric linear actuator according to any one of claims 1 to 6, wherein the holding and releasing actuator is a solenoid. 前記ソレノイドを、通電を止めたときにも吸引力を保持する自己保持型のものとした請求項7に記載の電動式直動アクチュエータ。   The electric linear actuator according to claim 7, wherein the solenoid is of a self-holding type that retains a suction force even when energization is stopped. 前記別途の回転付与機構を前記ロータ軸から回転を伝達される回転部材の回転部位に設けた請求項1乃至8のいずれかに記載の電動式直動アクチュエータ。   The electric linear motion actuator according to any one of claims 1 to 8, wherein the separate rotation imparting mechanism is provided at a rotating portion of a rotating member to which rotation is transmitted from the rotor shaft. 前記運動変換機構を、前記ロータ軸またはロータ軸から回転を伝達される前記回転部材としての回転軸のいずれかの回転軸部材と、この回転軸部材の外径側でハウジングの内径面に内嵌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、これらの遊星ローラが前記回転軸部材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し、前記外輪部材の内径面に螺旋凸条を設け、前記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、前記外輪部材と前記キャリヤとを回転の軸線方向へ相対移動させ、前記回転軸部材の回転運動を前記出力部材としての前記外輪部材または前記キャリヤの直線運動に変換するものとした請求項1乃至9のいずれかに記載の電動式直動アクチュエータ。   The motion conversion mechanism is fitted into the inner surface of the housing on the outer diameter side of the rotating shaft member and the outer surface of the rotating shaft member. A plurality of planetary rollers rotatably supported by the carrier are interposed between the outer ring member and the outer ring member so that these planetary rollers revolve while rotating around the rotating shaft member. A spiral ridge is provided on the inner diameter surface of the outer ring member, and a circumferential groove in which the spiral ridge is fitted on the outer diameter surface of the planetary roller at the same pitch as the spiral ridge, or a lead at the same pitch as the spiral ridge. A spiral groove in which a spiral protrusion is fitted at a different angle is provided, the outer ring member and the carrier are relatively moved in the rotational axis direction, and the rotational movement of the rotary shaft member is the outer ring member as the output member or The Electric linear motion actuator according to any one of claims 1 to 9 was assumed to be converted into linear motion of Ya. 電動モータの回転運動を出力部材の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10のいずれかに記載の電動式直動アクチュエータを用い、前記別途の回転付与機構で付与される回転を前記出力部材の直線運動に変換するようにしたことを特徴とする電動式ブレーキ装置。   In the electric brake device that includes an electric linear motion actuator that linearly drives the brake member by converting the rotary motion of the electric motor into a linear motion of the output member, and presses the brake member that is linearly driven against the member to be braked, The electric linear motion actuator according to any one of claims 1 to 10 is used as the electric linear motion actuator, and rotation applied by the separate rotation applying mechanism is converted into linear motion of the output member. Electric brake device characterized by
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