JP2673088B2 - Clutch device - Google Patents
Clutch deviceInfo
- Publication number
- JP2673088B2 JP2673088B2 JP10426893A JP10426893A JP2673088B2 JP 2673088 B2 JP2673088 B2 JP 2673088B2 JP 10426893 A JP10426893 A JP 10426893A JP 10426893 A JP10426893 A JP 10426893A JP 2673088 B2 JP2673088 B2 JP 2673088B2
- Authority
- JP
- Japan
- Prior art keywords
- shaft
- outer ring
- torque
- peripheral surface
- transmission mechanism
- 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.)
- Expired - Lifetime
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D41/00—Freewheels or freewheel clutches
- F16D41/06—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface
- F16D41/08—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface with provision for altering the freewheeling action
- F16D41/10—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface with provision for altering the freewheeling action with self-actuated reversing
- F16D41/105—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface with provision for altering the freewheeling action with self-actuated reversing the intermediate members being of circular cross-section, of only one size and wedging by rolling movement not having an axial component between inner and outer races, one of which is cylindrical
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Steering Mechanism (AREA)
- One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)
Description
【0001】[0001]
【産業上の利用分野】この発明は、クラッチ装置に係
り、特に、電動パワーステアリング装置に適したクラッ
チ装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clutch device, and more particularly to a clutch device suitable for an electric power steering device.
【0002】[0002]
【従来の技術】図14は、電動パワーステアリング装置
の一般的な構成を示す。この装置は、ハンドル1を右又
は左に回転操作すると、車輪2からの抵抗によりハンド
ル軸3にトルクが発生する。このトルクをハンドル軸3
に設けたセンサ4により検出し、制御装置5を通じてモ
ータ6を駆動する。モータ6の駆動軸は減速機7を介し
てハンドル軸3のピニオン8に連結され、これにかみ合
ったラック9を介して車輪2を操舵するようになってい
る。これによって、非常にわずかなハンドル操作力によ
って車輪2を操舵することができる。2. Description of the Related Art FIG. 14 shows a general structure of an electric power steering apparatus. In this device, when the steering wheel 1 is rotated right or left, a torque is generated on the handle shaft 3 by resistance from the wheels 2. This torque is applied to the handle shaft 3
, And the motor 6 is driven through the control device 5. The drive shaft of the motor 6 is connected to the pinion 8 of the handle shaft 3 via a speed reducer 7, and the wheels 2 are steered via a rack 9 engaged with the pinion 8. As a result, the wheel 2 can be steered by a very slight steering force.
【0003】[0003]
【発明が解決しようとする課題】しかし、このような電
動パワーステアリング装置においては、制御装置5、モ
ータ6及び減速機7を含む駆動系に異常が発生し、これ
らが作動しない場合には、ハンドル軸3に減速機7及び
モータ6が連結されているため、手動によるハンドル操
作力が過大となり、実質的に操舵不能に陥る問題があ
る。However, in such an electric power steering apparatus, if an abnormality occurs in the drive system including the control device 5, the motor 6, and the speed reducer 7, and if these do not operate, the steering wheel is not operated. Since the speed reducer 7 and the motor 6 are connected to the shaft 3, there is a problem that the manual operation force of the steering wheel becomes excessively large and the steering becomes substantially impossible.
【0004】そのため、減速機7とピニオン8との間に
クラッチ装置10を介在する方法が知られている。Therefore, a method is known in which the clutch device 10 is interposed between the speed reducer 7 and the pinion 8.
【0005】この場合のクラッチ装置10としては、電
磁クラッチを使用することができるが、所要の伝達トル
クを得るには大形になる欠点がある。また、かみ合いク
ラッチを使用すると、かみ合いの位置合せや負荷時のか
み合い解除に大きな力を必要とするなどの問題点があ
る。An electromagnetic clutch can be used as the clutch device 10 in this case, but it has a drawback that it is large in size to obtain a required transmission torque. Further, the use of the meshing clutch has a problem that a large force is required for aligning the meshing position and releasing the meshing condition under load.
【0006】この発明の課題は、第1の駆動軸と第2の
駆動軸の2つの入力を、外部から制御することなく機械
的に切り換えて被駆動軸に伝達することができる伝達の
信頼性が高い小型のクラッチ装置を提供することであ
る。An object of the present invention is to improve the reliability of transmission in which two inputs of a first drive shaft and a second drive shaft can be mechanically switched and transmitted to a driven shaft without external control. It is to provide a small clutch device having high cost.
【0007】[0007]
【課題を解決するための手段】上記の課題を解決するた
めに、第1の発明においては、第1軸の端部に設けた円
筒状の保持器内に、第1軸と同軸上に設けた第2軸の端
部を挿入し、その第1軸と第2軸との間に回転方向すき
まを有するトルク伝達機構を設け、このトルク伝達機構
を中立位置に保持し、設定トルクを超えた回転力が伝達
されたとき上記回転方向すきまが無くなるまで弾性変形
するトルク設定弾性部材を前記第1軸と第2軸との間に
設け、上記保持器の外側に外部動力によって回転駆動さ
れる外輪を設け、上記保持器に形成されたポケット内
に、前記第1軸と第2軸とが相対的に所定角度回転した
とき外輪の内周面と第2軸の外周面に係合して、外輪の
第1軸と同方向の回転のみを第2軸に伝達する係合部材
を収納し、その係合部材は、前記トルク伝達機構が回転
方向すきまの中立位置で保持されている状態で外輪の内
周面と第2軸の外周面に係合せず、前記トルク伝達機構
が回転方向に係合する前に上記外輪と第2軸に係合する
ようにされた構成を採用している。 In order to solve the above problems, in the first invention, a circle provided at the end of the first shaft is used .
The end of the second shaft provided coaxially with the first shaft in the cylindrical cage.
Part, and insert a gap in the direction of rotation between the first and second shafts.
A torque transmission mechanism having
Is held in the neutral position, and torque exceeding the set torque is transmitted.
When elastically deformed elastically until the above-mentioned clearance in the rotation direction disappears
And a torque setting elastic member between the first shaft and the second shaft.
Provided outside the cage and driven to rotate by external power.
Inside the pocket formed on the cage
In addition, the first shaft and the second shaft are relatively rotated by a predetermined angle.
At this time, the outer peripheral surface of the second shaft is engaged with the inner peripheral surface of the outer ring to
Engagement member that transmits only rotation in the same direction as the first shaft to the second shaft
The torque transmission mechanism is rotated by the engaging member.
Of the outer ring while being held in the neutral position of the direction clearance.
The torque transmission mechanism does not engage the peripheral surface and the outer peripheral surface of the second shaft.
Engages the outer ring and the second shaft before engaging in the rotational direction
The adopted configuration is adopted.
【0008】また、第2の発明においては、第1軸の端
部に設けた円筒状の保持器内に、外部動力によって回転
駆動される第2軸の端部を挿入し、上記第1軸と、その
第1軸の保持器を覆う外輪との間に回転方向すきまを有
するトルク伝達機構を設け、このトルク伝達機構を中立
位置に保持し、設定トルクを超えた回転トルクが伝達さ
れたとき上記回転方向すきまが無くなるまで弾性変形す
るトルク設定弾性部材を前記第1軸と外輪との間に設
け、上記保持器に形成されたポケット内に、前記第1軸
と外輪とが相対的に所定角度回転したとき第2軸の外周
面と外輪の内周面に係合して、第2軸の第1軸と同方向
の回転のみを外輪に伝達する係合部材を収納し、その係
合部材は、前記トルク伝達機構が回転方向すきまの中立
位置で保持されている状態で外輪の内周面と第2軸の外
周面に係合せず、前記トルク伝達機構が回転方向に係合
する前に上記外輪と第2軸とに係合するようにされた構
成を採用している。 In the second invention, the end of the first shaft is
Rotated by external power in a cylindrical cage provided in the section
Insert the end of the driven second shaft, and insert the first shaft and its
There is a clearance in the direction of rotation between the outer ring and the cage of the first shaft.
A torque transmission mechanism is installed to neutralize this torque transmission mechanism.
Hold it in the position and the rotation torque exceeding the set torque is transmitted.
Elastically deforms until the above clearance in the rotation direction disappears.
A torque setting elastic member is installed between the first shaft and the outer ring.
In the pocket formed in the cage, the first shaft
When the outer ring and the outer ring rotate relative to each other by a predetermined angle, the outer circumference of the second shaft
In the same direction as the first shaft of the second shaft by engaging the surface and the inner peripheral surface of the outer ring
The engaging member that transmits only the rotation of the
The joint member is such that the torque transmission mechanism is neutral in the rotational direction clearance.
The outer peripheral surface of the outer ring and the outer surface of the second shaft when held in place.
The torque transmission mechanism is engaged in the rotation direction without engaging with the peripheral surface
Before engaging with the outer ring and the second shaft.
Is adopted.
【0009】[0009]
【作用】第1の発明において、第1軸に付与される回転
トルクがトルク設定弾性部材の設定トルク以下である
と、トルク設定弾性部材の弾性変形量が小さく、係合部
材は、第2軸の外周面および外輪の内周面に係合しない
状態にあって、クラッチ作動せず、第1軸から第2軸に
回転力が伝達される。In the first aspect of the invention, when the rotational torque applied to the first shaft is less than or equal to the set torque of the torque setting elastic member, the elastic deformation amount of the torque setting elastic member is small and the engaging member is the second shaft. In a state where it does not engage with the outer peripheral surface and the inner peripheral surface of the outer ring, the clutch does not operate, and the rotational force is transmitted from the first shaft to the second shaft.
【0010】第1軸の回転トルクがトルク設定弾性部材
の設定トルクを越えると、トルク設定弾性部材のが大き
く弾性変形し、第1軸が第2軸に対して大きく相対回転
し、その相対回転により係合部材が第2軸の外周面およ
び外輪の外周面に係合してクラッチが入り、第1軸及び
外輪の2つの回転が第2軸に伝達される。When the rotation torque of the first shaft exceeds the set torque of the torque setting elastic member, the torque setting elastic member is largely elastically deformed, and the first shaft relatively rotates relatively to the second shaft. Thus, the engagement member engages the outer peripheral surface of the second shaft and the outer peripheral surface of the outer ring to engage the clutch, and two rotations of the first shaft and the outer ring are transmitted to the second shaft.
【0011】このように構成されたクラッチ装置を電動
パワーステアリング装置に使用する場合は、第1軸をハ
ンドル軸に接続し、第2軸をピニオン軸に連結し、外輪
にモータの回転が伝達されるようにする。これにより、
ハンドル操作力がトルク設定弾性部材の設定トルク以下
であると、ハンドル軸からピニオン軸に手動の操作力が
伝達される。また、設定トルクを越えると、クラッチが
作動し、ピニオン軸にモータの回転力が伝達される。こ
のため、非常にわずかのハンドル操作力で車輪の操作が
可能となる。When the clutch device thus constructed is used in an electric power steering device, the first shaft is connected to the handle shaft, the second shaft is connected to the pinion shaft, and the rotation of the motor is transmitted to the outer wheel. To do so. This allows
When the handle operating force is less than or equal to the set torque of the torque setting elastic member, the manual operating force is transmitted from the handle shaft to the pinion shaft. When the set torque is exceeded, the clutch operates and the torque of the motor is transmitted to the pinion shaft. Therefore, the wheels can be operated with a very small steering wheel operating force.
【0012】万一、モータを含む駆動系に異常が発生
し、これが作動しないときには、ハンドル操作力がトル
ク設定弾性部材の設定トルク以上である場合、第1軸と
第2軸の相対回転により係合部材は第2軸の外周面と外
輪の外周面に係合しようとするが、第1軸からの回転運
動については、係合部材は外輪の内周面を滑り、駆動系
と遮断された状態でハンドル操作力がピニオン軸に伝達
され、手動の操舵が可能となる。If an abnormality occurs in the drive system including the motor and it does not operate, if the handle operating force is equal to or greater than the torque set by the torque setting elastic member, the relative rotation of the first shaft and the second shaft causes engagement. The coupling member tries to engage the outer peripheral surface of the second shaft and the outer peripheral surface of the outer ring, but with respect to the rotational movement from the first shaft, the engaging member slides on the inner peripheral surface of the outer ring and is disconnected from the drive system. In this state, the steering wheel operating force is transmitted to the pinion shaft, enabling manual steering.
【0013】また、カーブからの立ち直り時、車輪側か
らハンドルが戻される場合には、運転者はハンドルを軽
く手で滑らす程度のトルクしか掛けないので設定トルク
以下であり、駆動系とはクラッチ作動せず、手動操作の
状態となる。Further, when the steering wheel is returned from the wheel side at the time of recovering from a curve, the driver applies only a torque that allows the steering wheel to be slipped lightly by hand, so the torque is less than the set torque, and the drive system does not operate the clutch. Instead, it goes into the state of manual operation.
【0014】したがって、トルク設定弾性部材のばね力
を適切に設定することにより、設定トルク以下では手動
操作、設定トルクを越えるとパワーステアリングへ自動
的に切り換えられ、また、モータ等を含む駆動系に異常
が発生したときでも、手動によるハンドル操作力が過大
となることはなく、かつカーブからの立ち直り時に運転
者に違和感を与えることなく滑らかにハンドルが戻され
る。Therefore, by properly setting the spring force of the torque setting elastic member, manual operation is performed below the set torque, power steering is automatically switched over when the set torque is exceeded, and a drive system including a motor or the like is used. Even when an abnormality occurs, the manual steering wheel operation force does not become excessive, and the steering wheel can be smoothly returned without causing the driver to feel discomfort when recovering from a curve.
【0015】第2の発明においては、第1軸の回転トル
クがトルク設定弾性部材の設定トルクを越えると、係合
部材が第2軸の外周面および外輪の内周面に係合し、第
1軸および第2軸の回転を外輪に伝達することができ
る。第2の発明に係るクラッチ装置を電動パワーステア
リング装置に組込む場合は、第1軸をハンドル軸に接続
し、外輪をピニオン軸に連結し、第2軸にモータの回転
が伝達されるようにする。In the second invention, when the rotational torque of the first shaft exceeds the set torque of the torque setting elastic member, the engaging member engages with the outer peripheral surface of the second shaft and the inner peripheral surface of the outer ring, The rotations of the first shaft and the second shaft can be transmitted to the outer ring. When the clutch device according to the second invention is incorporated in the electric power steering device, the first shaft is connected to the handle shaft, the outer ring is connected to the pinion shaft, and the rotation of the motor is transmitted to the second shaft. .
【0016】[0016]
【実施例】以下、この発明の実施例を図1乃至図9に基
づいて説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.
【0017】図1乃至図4はこの発明に係るクラッチ装
置の第1の実施例を示す。図示のように、第1軸11は
端部に円筒形の保持器12を有し、その保持器12内に
第2軸13の端部に形成した角軸部14が挿入されてい
る。1 to 4 show a first embodiment of a clutch device according to the present invention. As shown in the figure, the first shaft 11 has a cylindrical retainer 12 at the end thereof, and the angular shaft portion 14 formed at the end of the second shaft 13 is inserted into the retainer 12.
【0018】角軸部14の端面には小径軸部15が設け
られ、その小径軸部15は上記保持器12の閉塞端に形
成した軸挿孔16に挿入され、軸受17を介して回転自
在に支持されている。A small-diameter shaft portion 15 is provided on the end surface of the angular shaft portion 14, and the small-diameter shaft portion 15 is inserted into a shaft insertion hole 16 formed at the closed end of the cage 12 and is rotatable via a bearing 17. Supported by.
【0019】角軸部14の外周には外径方向に向くピン
18が設けられ、そのピン18は第1軸11の保持器1
2に形成したピン孔19に挿入されている。ピン孔19
は、保持器12の周方向に長く延びる長孔とされ、その
ピン孔19との両端とピン18との間に回転方向すきま
Aが設けられている(図3参照)。また、ピン孔19に
はピン18の両側にスプリングから成るトルク設定弾性
部材20が組込まれ、そのトルク設定弾性部材20によ
ってピン18は回転方向すきまAの中立位置に保持され
ている。A pin 18 facing the outer diameter is provided on the outer periphery of the square shaft portion 14, and the pin 18 is the retainer 1 of the first shaft 11.
It is inserted in the pin hole 19 formed in 2. Pin hole 19
Is a long hole extending in the circumferential direction of the cage 12, and a rotational clearance A is provided between the pin 18 and both ends of the hole (see FIG. 3). In addition, the pin hole 19 has a torque setting elasticity composed of springs on both sides of the pin 18.
The member 20 is incorporated, and the torque setting elastic member 20 holds the pin 18 in the neutral position of the clearance A in the rotational direction.
【0020】ここで、トルクの設定弾性部材20のばね
力は、第1軸11に一定以上の回転力が作用したとき、
回転方向すきまAが無くなるまでトルク設定弾性部材2
0が弾性変形し、保持器12と第2軸13とがピン18
を介して係合するよう決定されている。Here, the spring force of the torque setting elastic member 20 is such that when a predetermined or more rotational force acts on the first shaft 11,
The torque setting elastic member 2 until the clearance A in the rotation direction disappears
0 is elastically deformed, and the cage 12 and the second shaft 13 are pin 18
To be engaged via.
【0021】第1軸11と第2軸13の接続部の外側に
は円筒状の外輪21が設けられ、その外輪21は2個の
軸受22、22を介して第1軸11及び第2軸13の両
軸に対して相対的に回転自在に支持されている。A cylindrical outer ring 21 is provided on the outer side of the connecting portion between the first shaft 11 and the second shaft 13, and the outer ring 21 is provided with two bearings 22, 22 for the first shaft 11 and the second shaft. It is supported so as to be relatively rotatable with respect to both shafts of 13.
【0022】前記第1軸11の保持器12には複数のポ
ケット23が周方向に所要の間隔をおいて設けられてい
る。各ポケット23は角軸部14の外周の平坦面14a
と対向し、そのポケット23内にローラから成る2個の
係合部材24a、24bと、その係合部材24a、24
bのそれぞれをポケット23の周方向で対向する壁面2
3aに押し付ける弾性体25とが組込まれている。各係
合部材24a、24bは図3に示すピン18が回転方向
すきまAの中立位置に位置する状態では角軸部14の平
坦面14aおよび外輪21の円筒形内面21aのいずれ
にも係合していない。The retainer 12 of the first shaft 11 is provided with a plurality of pockets 23 at predetermined intervals in the circumferential direction. Each pocket 23 has a flat surface 14a on the outer periphery of the angular shaft portion 14.
And two engaging members 24a, 24b formed of rollers in the pocket 23, and the engaging members 24a, 24
Wall surfaces 2 facing each other in the circumferential direction of the pocket 23
An elastic body 25 that is pressed against 3a is incorporated. Each of the engaging members 24a and 24b engages with both the flat surface 14a of the angular shaft portion 14 and the cylindrical inner surface 21a of the outer ring 21 when the pin 18 shown in FIG. Not not.
【0023】第1の実施例で示すクラッチは上記の構造
から成り、このクラッチ装置を電動パワーステアリング
装置に使用する場合は、図5に示すように、ハンドル4
0を備えるハンドル軸41を第1軸11に接続し、第2
軸13にラック42と噛み合うピニオン43の軸44を
接続する。また、ハンドル軸41のねじれを検出するセ
ンサ45を設け、このセンサ45により制御装置46を
通じて制御されるモータ47の回転を、ギヤ電動機構の
トルク伝達機構48を介して外輪21に伝えるようにす
る。このため、外輪21には、ギヤ等のトルク伝達部材
を取付けておくようにする。The clutch shown in the first embodiment has the above structure, and when this clutch device is used in an electric power steering device, as shown in FIG.
The handle shaft 41 with 0 is connected to the first shaft 11
A shaft 44 of a pinion 43 that meshes with the rack 42 is connected to the shaft 13. Further, a sensor 45 for detecting the twist of the handle shaft 41 is provided, and the rotation of the motor 47 controlled by the sensor 45 through the control device 46 is transmitted to the outer ring 21 via the torque transmission mechanism 48 of the gear electric mechanism. . Therefore, a torque transmitting member such as a gear is attached to the outer ring 21.
【0024】上記のような組込み状態において、ハンド
ル40を回転操作し、第1軸11に図3の矢印で示す方
向の回転力を付与した場合、そのハンドル操作力がトル
ク設定弾性部材20の設定トルク以下であると、上記ト
ルク設定弾性部材20の変形が小さく、第1軸11は第
2軸13に対して余り回転しないので、係合部材24
a、24bは第2軸13の角軸部14の平坦面14aお
よび外輪21の円筒形内面21aに係合せず、クラッチ
は作動しない。In the assembled state as described above, when the handle 40 is rotated and a rotational force in the direction indicated by the arrow in FIG. 3 is applied to the first shaft 11, the handle operating force sets the torque setting elastic member 20. If the torque is equal to or less than the torque, the deformation of the torque setting elastic member 20 is small, and the first shaft 11 does not rotate much with respect to the second shaft 13.
a and 24b do not engage with the flat surface 14a of the square shaft portion 14 of the second shaft 13 and the cylindrical inner surface 21a of the outer ring 21, and the clutch does not operate.
【0025】したがって、ハンドル操作力が小さいとき
は外輪21から第2軸13への回転力の伝達はなく、手
動によるハンドル操作になる。Therefore, when the steering wheel operating force is small, no rotational force is transmitted from the outer ring 21 to the second shaft 13, and the steering wheel is manually operated.
【0026】ハンドル操作力が大きくなり、トルク設定
弾性部材20の設定トルクを越えると、図4に示すよう
に、第1軸11の保持器12はトルク設定弾性部材20
を弾性変形させて回転方向すきまAが無くなるまで第2
軸13に対して相対回転し、保持器12からピン18、
第2軸13、ピニオン軸44、ピニオン43およびラッ
ク42を介して車輪に操作力が伝達される。When the handle operating force increases and exceeds the set torque of the torque setting elastic member 20, the retainer 12 of the first shaft 11 moves to the torque setting elastic member 20 as shown in FIG.
Until the rotation direction clearance A disappears by elastically deforming the
Rotating relative to the shaft 13, the retainer 12 to the pin 18,
The operating force is transmitted to the wheels via the second shaft 13, the pinion shaft 44, the pinion 43, and the rack 42.
【0027】同時に、保持器12は、第2軸13に対す
る相対回転により、ポケット23内に収容された一対の
係合部材24a、24bのうち、右側の係合部材24a
を弾性体25の弾力により角軸部14の平坦面14aお
よび外輪21の円筒形内面21aに係合させる。At the same time, the cage 12 is rotated relative to the second shaft 13 so that the right engaging member 24a of the pair of engaging members 24a, 24b housed in the pocket 23 is engaged.
Is engaged with the flat surface 14a of the angular shaft portion 14 and the cylindrical inner surface 21a of the outer ring 21 by the elastic force of the elastic body 25.
【0028】一方、車輪に操作力が伝達されて車輪から
の抵抗によりハンドル軸41にトルクが発生し、このト
ルクをハンドル軸41に設けたセンサ45により検出
し、制御装置46を通じてモータ47を駆動させる。そ
のモータ47の回転は、外輪に伝達される。このとき、
クラッチはすでに作動しているため、モータ47の回転
は、外輪21から係合部材24aを介して第2軸13に
伝達され、ピニオン軸44、ピニオン43およびラック
42を介して車輪に伝達される。On the other hand, the operating force is transmitted to the wheels, and a torque is generated on the handle shaft 41 due to the resistance from the wheels. The torque is detected by the sensor 45 provided on the handle shaft 41, and the motor 47 is driven through the control device 46. Let The rotation of the motor 47 is transmitted to the outer ring. At this time,
Since the clutch is already in operation, the rotation of the motor 47 is transmitted from the outer ring 21 to the second shaft 13 via the engaging member 24a and to the wheels via the pinion shaft 44, the pinion 43 and the rack 42. .
【0029】このように、ハンドル操作力が設定トルク
を越えた場合にはパワーステアリングに切り換わり、非
常にわずかなハンドル操作力により車輪を操舵すること
ができる。As described above, when the steering wheel operating force exceeds the set torque, the steering mode is switched to the power steering, and the wheels can be steered with a very slight steering wheel operating force.
【0030】万一、制御装置46、モータ47を含む駆
動系に異常が発生し、これらが作動しない場合には、ハ
ンドル40を操作するとハンドル軸41に連結された第
1軸11が回転される。第1軸11が第2軸13に対し
て例えば左方向に相対回転されると、係合部材24aが
周方向に押されて図4に示す状態となるが、第1軸11
からの回転によってはクラッチは作動せず、係合部材2
4aは外輪21の円筒形内面21aを滑り乍ら周方向に
移動する。If an abnormality occurs in the drive system including the control device 46 and the motor 47 and they do not operate, the handle 40 is operated to rotate the first shaft 11 connected to the handle shaft 41. . When the first shaft 11 is rotated relative to the second shaft 13 in the left direction, for example, the engaging member 24a is pushed in the circumferential direction to be in the state shown in FIG.
The clutch does not operate depending on the rotation from the engaging member 2
4a slides on the cylindrical inner surface 21a of the outer ring 21 and moves in the circumferential direction.
【0031】したがって、第1軸11からピン18、第
2軸13、ピニオン軸44、ピニオン43、ラック42
を介して手動による操作力が車輪に伝達され、駆動系と
遮断されていることにより手動によるハンドル操作力が
過大となることはない。Therefore, from the first shaft 11 to the pin 18, the second shaft 13, the pinion shaft 44, the pinion 43, and the rack 42.
The manual operation force is transmitted to the wheels via the control unit, and is not isolated from the driving system, so that the manual operation force of the steering wheel does not become excessive.
【0032】更に、駆動系が作動しない場合に車輪側か
らハンドルが戻されるときの作用について説明する。カ
ーブからの立ち直り時、車輪からラック42、ピニオン
43、ピニオン軸44、第2軸13へと力が伝達され
る。このハンドル戻し力に対して、運転者はハンドルを
軽く手で滑らず程度のトルクしか掛けないため、トルク
設定弾性部材20の設定トルク以下である。この場合、
第1軸11は第2軸13に対して余り相対回転しないの
で保持器12のポケット23内に収容された係合部材2
4aは、外輪21の円筒形内面21aおよび角軸部14
の平坦面に係合することがない。このため、クラッチは
作動せず、第2軸13から外輪21(回転不能)とは遮
断された状態で第1軸11およびこれに連結されたハン
ドル40が戻される。Further, the operation when the steering wheel is returned from the wheel side when the drive system does not operate will be described. At the time of recovery from the curve, the force is transmitted from the wheels to the rack 42, the pinion 43, the pinion shaft 44, and the second shaft 13. With respect to this steering wheel returning force, the driver applies only a certain amount of torque without slipping the steering wheel with his or her hand, and therefore is less than or equal to the set torque of the torque setting elastic member 20. in this case,
Since the first shaft 11 does not rotate relatively relative to the second shaft 13, the engagement member 2 housed in the pocket 23 of the retainer 12
4a is a cylindrical inner surface 21a of the outer ring 21 and the angular shaft portion 14
Does not engage the flat surface of the. Therefore, the clutch does not operate, and the first shaft 11 and the handle 40 connected to the first shaft 11 are returned with the outer shaft 21 (non-rotatable) disconnected from the second shaft 13.
【0033】したがって、カーブからの立ち直り時、運
転者に違和感を与えることなく滑らかにハンドルが戻さ
れる。Therefore, at the time of recovering from the curve, the steering wheel can be smoothly returned without giving the driver a feeling of strangeness.
【0034】図6および図7は、この発明に係るクラッ
チ装置の第2の実施例を示す。この第2の実施例におい
ては、第1軸11と第2軸13とに軸方向の孔26を形
成し、その孔26にトーションバーから成るトルク設定
弾性部材27を挿入し、そのトルク設定弾性部材27を
ホルダ28を介して各軸11、13に固定してある。6 and 7 show a second embodiment of the clutch device according to the present invention. In the second embodiment, an axial hole 26 is formed in each of the first shaft 11 and the second shaft 13, and a torque setting elastic member 27 formed of a torsion bar is inserted into the hole 26, and the torque setting elasticity is set. The member 27 is fixed to the shafts 11 and 13 via a holder 28.
【0035】また、ピン18とピン孔19との間に回転
方向すきまAが設けられている。その他の構成および作
用は第1の実施例と同じであり、説明を省略する。A rotation direction clearance A is provided between the pin 18 and the pin hole 19. Other configurations and operations are the same as those in the first embodiment, and the description thereof will be omitted.
【0036】図8は、この発明に係るクラッチ装置の第
3の実施例を示す。この実施例においては、第2の実施
例におけるトーションバーから成るトルク設定部材27
に代えて、板ばねから成るトルク設定部材29を用いる
ようにしている。FIG. 8 shows a third embodiment of the clutch device according to the present invention. In this embodiment, the torque setting member 27 including the torsion bar in the second embodiment is used.
Instead of this, a torque setting member 29 composed of a leaf spring is used.
【0037】図9は、この発明に係るクラッチ装置の第
4の実施例を示す。この実施例においては、外輪21の
内径面に凹入状のカム面21bを設け、第2軸14の外
径面を円筒面14bとしている。FIG. 9 shows a fourth embodiment of the clutch device according to the present invention. In this embodiment, a concave cam surface 21b is provided on the inner diameter surface of the outer ring 21, and the outer diameter surface of the second shaft 14 is a cylindrical surface 14b.
【0038】また、外輪21の内径面にピン30を設
け、そのピン30を保持器12に形成したピン孔19に
挿入してピン孔19の両端とピン30との間に回転方向
すきまAを形成している。Further, a pin 30 is provided on the inner diameter surface of the outer ring 21, and the pin 30 is inserted into the pin hole 19 formed in the cage 12 so that a clearance A in the rotational direction is provided between both ends of the pin hole 19 and the pin 30. Is forming.
【0039】さらに、ピン30とピン孔19との間にば
ねから成るトルク設定弾性部材20を組込んでピン30
を回転方向すきまAの中立位置に保持している。Further, a torque setting elastic member 20 made of a spring is incorporated between the pin 30 and the pin hole 19 to form the pin 30.
Is held at the neutral position of the clearance A in the rotation direction.
【0040】上記クラッチ装置を図5の電動パワーステ
アリング装置に使用する場合は、外輪21をピニオン軸
44に連結し、第2軸14にモータの回転力が伝達され
るようにする。When the clutch device is used in the electric power steering device of FIG. 5, the outer wheel 21 is connected to the pinion shaft 44 so that the rotational force of the motor is transmitted to the second shaft 14.
【0041】なお、実施例では、一対の係合部材24
a、24bを相反する方向に押圧する弾性体25として
コイルばねを用いたが、図10および図11に示すよう
に、板ばねを用いてもよい。この板ばねは、一対の係合
部材24a、24bのうち、一方の係合部材24aを押
圧する第1押圧片部aの両端部に傾斜片部bを設け、そ
の傾斜片部bの両端部に他方の係合部材24bを押圧す
る第2押圧片部cを形成している。In the embodiment, the pair of engaging members 24
Although a coil spring is used as the elastic body 25 that presses a and 24b in opposite directions, a leaf spring may be used as shown in FIGS. In this leaf spring, inclined piece portions b are provided at both ends of a first pressing piece portion a that presses one of the pair of engaging members 24a and 24b, and both end portions of the inclined piece portion b are provided. A second pressing piece portion c for pressing the other engaging member 24b is formed on the.
【0042】図12及び図13に示すように、第2押圧
片部cの端部に他方の係合部材24bの両端面に係合す
る折曲片部dを設け、第1押圧片部a、傾斜片部bおよ
び第2押圧片部cのそれぞれに、係合部材24a、24
bの一部が嵌合するスリットeを形成した板ばねを用い
ると保持器12と第2軸13又は外輪21とを相対的に
大きく回転させることができるため、図10に示す板ば
ねを採用したクラッチに比較して、クラッチの作動角を
大きくとることができる。As shown in FIGS. 12 and 13, a bent piece d that engages with both end surfaces of the other engaging member 24b is provided at the end of the second pressing piece c, and the first pressing piece a is provided. , The inclined piece b and the second pressing piece c, respectively, the engaging members 24a, 24
If a leaf spring having a slit e formed by fitting a part of b is used, the cage 12 and the second shaft 13 or the outer ring 21 can be relatively rotated, so that the leaf spring shown in FIG. 10 is used. The operating angle of the clutch can be made larger than that of the above-mentioned clutch.
【0043】また、作動角を同じとした場合には、係合
部材24a、24bの外径を大きくすることができ、ク
ラッチの容量を大きくすることができる。When the operating angles are the same, the outer diameters of the engaging members 24a and 24b can be increased, and the capacity of the clutch can be increased.
【0044】[0044]
【発明の効果】この発明は、以上のような構成にしたの
で、下記に示す効果を得ることができる。Since the present invention has the above-mentioned structure, the following effects can be obtained.
【0045】(イ) 設定トルク以下では第1軸から第2軸
に回転力を伝達し、設定トルク以上になったときは第1
軸と外輪の2つの入力を、外部から制御することなく機
械的に切り換えて、第2軸に伝達するクラッチ装置を可
能にする。(B) The torque is transmitted from the first shaft to the second shaft when the torque is less than the set torque, and the first torque is transmitted when the torque is more than the set torque.
This enables a clutch device that mechanically switches the two inputs of the shaft and the outer ring without external control, and transmits the power to the second shaft.
【0046】(ロ) 第1軸が第2軸と機械的な係合構造で
連結されていたので、伝達の信頼性が高い。(B) Since the first shaft is connected to the second shaft by a mechanical engagement structure, the reliability of transmission is high.
【0047】(ハ) 構造が簡単でコンパクトである。(C) The structure is simple and compact.
【0048】(ニ) 本クラッチ装置を電動パワーステアリ
ング装置に使用した場合には、トルク設定弾性部材の設
定ばね力による簡単な構成で、ハンドル操作力が設定ト
ルク以下のときは手動操作となり、また、設定トルクを
越えたときは自動的にパワーステアリングに切り換える
ことができ、しかも、外輪を駆動する駆動系に異常が発
生した場合には、駆動系と遮断する状態でハンドル操作
力をピニオン軸に伝達することができるため、操舵不能
になることがなく、電動パワーステアリング装置の安全
性と信頼性を向上させることができる。(D) When the present clutch device is used in an electric power steering device, it has a simple structure due to the set spring force of the torque setting elastic member, and when the handle operating force is less than the set torque, it is manually operated. When the set torque is exceeded, the power steering can be automatically switched, and when an abnormality occurs in the drive system that drives the outer wheels, the steering wheel operating force is transferred to the pinion shaft in the state of disconnecting from the drive system. Since it can be transmitted, steering cannot be disabled, and the safety and reliability of the electric power steering device can be improved.
【図1】この発明に係るクラッチ装置の第1の実施例を
示す縦断面図FIG. 1 is a longitudinal sectional view showing a first embodiment of a clutch device according to the present invention.
【図2】図1のII−II線に沿った断面図FIG. 2 is a sectional view taken along line II-II in FIG.
【図3】同上の拡大断面図FIG. 3 is an enlarged sectional view of the above.
【図4】同上の作動状態を示す断面図FIG. 4 is a sectional view showing an operation state of the above.
【図5】この発明のクラッチ装置を電動パワーステアリ
ング装置に使用した状態の概略図FIG. 5 is a schematic view of a state in which the clutch device of the present invention is used in an electric power steering device.
【図6】この発明に係るクラッチ装置の第2の実施例を
示す縦断面図FIG. 6 is a vertical sectional view showing a second embodiment of the clutch device according to the present invention.
【図7】図6のVII −VII 線に沿った断面図FIG. 7 is a sectional view taken along the line VII-VII of FIG. 6;
【図8】この発明に係るクラッチ装置の第3の実施例を
示す縦断面図FIG. 8 is a longitudinal sectional view showing a third embodiment of the clutch device according to the present invention.
【図9】この発明に係るクラッチ装置の第4の実施例を
示す断面図FIG. 9 is a sectional view showing a fourth embodiment of the clutch device according to the present invention.
【図10】係合部材を押圧する弾性体の他の例を示す平
面図FIG. 10 is a plan view showing another example of the elastic body that presses the engaging member.
【図11】図10のXI−XI線に沿った断面図11 is a sectional view taken along the line XI-XI in FIG.
【図12】同上弾性体のさらに他の例を示す平面図FIG. 12 is a plan view showing still another example of the elastic body.
【図13】図12のXIII−XIII線に沿った断面図FIG. 13 is a sectional view taken along lines XIII-XIII in FIG. 12;
【図14】従来の電動パワーステアリング装置を示す概
略図FIG. 14 is a schematic diagram showing a conventional electric power steering device.
11 第1軸 12 保持器 13 第2軸 20、27、29 トルク設定弾性部材 21 外輪 24a、24b 係合部材11 1st shaft 12 Cage 13 2nd shaft 20, 27 , 29 Torque setting elastic member 21 Outer ring 24a, 24b Engaging member
Claims (2)
に、第1軸と同軸上に設けた第2軸の端部を挿入し、そ
の第1軸と第2軸との間に回転方向すきまを有するトル
ク伝達機構を設け、このトルク伝達機構を中立位置に保
持し、設定トルクを超えた回転力が伝達されたとき上記
回転方向すきまが無くなるまで弾性変形するトルク設定
弾性部材を前記第1軸と第2軸との間に設け、上記保持
器の外側に外部動力によって回転駆動される外輪を設
け、上記保持器に形成されたポケット内に、前記第1軸
と第2軸とが相対的に所定角度回転したとき外輪の内周
面と第2軸の外周面に係合して、外輪の第1軸と同方向
の回転のみを第2軸に伝達する係合部材を収納し、その
係合部材は、前記トルク伝達機構が回転方向すきまの中
立位置で保持されている状態で外輪の内周面と第2軸の
外周面に係合せず、前記トルク伝達機構が回転方向に係
合する前に上記外輪と第2軸に係合するようになってい
ることを特徴とするクラッチ。1. An end of a second shaft provided coaxially with the first shaft is inserted into a cylindrical retainer provided at the end of the first shaft, and the first shaft and the second shaft are inserted. A torque transmission mechanism with a rotation direction clearance is provided between the two, and this torque transmission mechanism is held in the neutral position, and when a rotational force exceeding the set torque is transmitted, it elastically deforms until the above rotation direction clearance disappears. A member is provided between the first shaft and the second shaft, an outer ring that is rotationally driven by external power is provided outside the cage, and the first shaft and the first shaft are provided in a pocket formed in the cage. Engagement that engages the inner peripheral surface of the outer ring and the outer peripheral surface of the second shaft when the two shafts rotate relative to each other by a predetermined angle, and transmits only the rotation of the outer ring in the same direction as the first shaft to the second shaft. The member is housed, and the engaging member holds the torque transmission mechanism in the neutral position of the clearance in the rotational direction. In this state, the inner peripheral surface of the outer ring and the outer peripheral surface of the second shaft are not engaged, but the outer ring and the second shaft are engaged before the torque transmission mechanism is engaged in the rotational direction. Characteristic clutch.
に、外部動力によって回転駆動される第2軸の端部を挿
入し、上記第1軸と、その第1軸の保持器を覆う外輪と
の間に回転方向すきまを有するトルク伝達機構を設け、
このトルク伝達機構を中立位置に保持し、設定トルクを
超えた回転トルクが伝達されたとき上記回転方向すきま
が無くなるまで弾性変形するトルク設定弾性部材を前記
第1軸と外輪との間に設け、上記保持器に形成されたポ
ケット内に、前記第1軸と外輪とが相対的に所定角度回
転したとき第2軸の外周面と外輪の内周面に係合して、
第2軸の第1軸と同方向の回転のみを外輪に伝達する係
合部材を収納し、その係合部材は、前記トルク伝達機構
が回転方向すきまの中立位置で保持されている状態で外
輪の内周面と第2軸の外周面に係合せず、前記トルク伝
達機構が回転方向に係合する前に上記外輪と第2軸とに
係合するようになっていることを特徴とするクラッチ。2. An end portion of a second shaft, which is rotationally driven by external power, is inserted into a cylindrical retainer provided at the end portion of the first shaft, and the first shaft and the first shaft are A torque transmission mechanism with a rotational clearance is provided between the cage and the outer ring.
A torque setting elastic member is provided between the first shaft and the outer ring, which holds the torque transmission mechanism in a neutral position and elastically deforms until the clearance in the rotation direction disappears when the rotation torque exceeding the set torque is transmitted. In the pocket formed in the cage, when the first shaft and the outer ring relatively rotate by a predetermined angle, engage with the outer peripheral surface of the second shaft and the inner peripheral surface of the outer ring,
An engaging member that transmits only the rotation of the second shaft in the same direction as the first shaft to the outer ring is housed, and the engaging member holds the torque transmitting mechanism in the neutral position of the rotation direction clearance while the outer ring is being held. Is not engaged with the inner peripheral surface of the second shaft and the outer peripheral surface of the second shaft, but is engaged with the outer ring and the second shaft before the torque transmission mechanism is engaged in the rotational direction. clutch.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP25521287 | 1987-10-09 | ||
JP62-255212 | 1987-10-09 |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13077088A Division JPH0781597B2 (en) | 1987-10-09 | 1988-05-27 | Clutch device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH06185547A JPH06185547A (en) | 1994-07-05 |
JP2673088B2 true JP2673088B2 (en) | 1997-11-05 |
Family
ID=17275576
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10426893A Expired - Lifetime JP2673088B2 (en) | 1987-10-09 | 1993-04-30 | Clutch device |
JP5104275A Expired - Fee Related JP2648551B2 (en) | 1987-10-09 | 1993-04-30 | Electric power steering device |
JP5104349A Expired - Fee Related JP2653965B2 (en) | 1987-10-09 | 1993-04-30 | Electric power steering device |
Family Applications After (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5104275A Expired - Fee Related JP2648551B2 (en) | 1987-10-09 | 1993-04-30 | Electric power steering device |
JP5104349A Expired - Fee Related JP2653965B2 (en) | 1987-10-09 | 1993-04-30 | Electric power steering device |
Country Status (1)
Country | Link |
---|---|
JP (3) | JP2673088B2 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100320869B1 (en) * | 1999-12-31 | 2004-09-07 | 현대자동차주식회사 | Motor protection structure of power steering device actioned motor |
KR100460866B1 (en) * | 2001-11-07 | 2004-12-09 | 현대자동차주식회사 | Sub torque generation apparatus for preventing car from breaking away from driving line |
JP4622703B2 (en) * | 2005-06-29 | 2011-02-02 | 株式会社ジェイテクト | Power steering device |
JP5402133B2 (en) * | 2009-03-19 | 2014-01-29 | 日産自動車株式会社 | Clutch for vehicle steering system |
JP6659396B2 (en) * | 2016-02-19 | 2020-03-04 | ナブテスコ株式会社 | Steering gear |
CN115384603B (en) * | 2022-04-21 | 2023-10-31 | 奇瑞汽车股份有限公司 | Vehicle rocker structure and vehicle |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57182920A (en) * | 1981-05-06 | 1982-11-11 | Mitsubishi Electric Corp | Switch |
JPS59501170A (en) * | 1982-06-28 | 1984-07-05 | ノ−トン,ピ−タ− | Coupling between drive shaft and servo motor driven shaft |
JPS5975395A (en) * | 1982-10-22 | 1984-04-28 | 松下電器産業株式会社 | Voice alarm |
JPS5987376U (en) * | 1982-12-02 | 1984-06-13 | トヨタ自動車株式会社 | Electric power steering device |
JPS60188064U (en) * | 1984-05-23 | 1985-12-13 | 日産自動車株式会社 | Unlocking device for motor-driven steering device |
-
1993
- 1993-04-30 JP JP10426893A patent/JP2673088B2/en not_active Expired - Lifetime
- 1993-04-30 JP JP5104275A patent/JP2648551B2/en not_active Expired - Fee Related
- 1993-04-30 JP JP5104349A patent/JP2653965B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH06185547A (en) | 1994-07-05 |
JPH06183356A (en) | 1994-07-05 |
JP2653965B2 (en) | 1997-09-17 |
JP2648551B2 (en) | 1997-09-03 |
JPH06183357A (en) | 1994-07-05 |
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