JP2009115171A - Cam device having output shaft - Google Patents
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- JP2009115171A JP2009115171A JP2007287710A JP2007287710A JP2009115171A JP 2009115171 A JP2009115171 A JP 2009115171A JP 2007287710 A JP2007287710 A JP 2007287710A JP 2007287710 A JP2007287710 A JP 2007287710A JP 2009115171 A JP2009115171 A JP 2009115171A
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Abstract
Description
本発明は、カム体のカム面の形状に沿って従動する進退移動可能な出力軸を備えたカム装置に関する。 The present invention relates to a cam device including an output shaft that can move forward and backward along the shape of a cam surface of a cam body.
一般に、機械カム手段には、主軸(モータ出力軸)、カム体及び従動軸(従節)から構成され、カム体を、回転運動を直線運動に変える一つの手段として、1回転中における所望の動作カーブ(変位曲線)に対応したカム面の周上に従動軸を配設し、カム体を回転させることで所望の直線運動を得ることにより、主軸の回転を機械的に従動軸の進退移動変位に変換するものが知られている。 In general, the mechanical cam means is composed of a main shaft (motor output shaft), a cam body and a driven shaft (follower shaft). The cam body is a means for changing the rotational motion into a linear motion, and a desired one during one rotation. By arranging a driven shaft on the circumference of the cam surface corresponding to the operation curve (displacement curve) and rotating the cam body to obtain the desired linear motion, the rotation of the main shaft is mechanically moved forward and backward. What converts to displacement is known.
ところで従来、特許文献1に示す如く、円盤形状の底部外周から軸線方向に向けて延出するカム面(23)が形成された、所謂溝カムと称される筒状(キャップ状)のカム体(19)を、主軸としてのモータ出力軸(18)に連結し、押圧棒(24)をカム面(23)に係合させて、弁体(12)として一体形成した案内ロッド(15)を従動軸として進退移動させるようにしたものがある。この様な筒状のカム体は、所謂板カムと称されるものに比し、従動軸を主軸と同軸線上に配することができる利点を有している。 Conventionally, as shown in Patent Document 1, a cylindrical (cap-shaped) cam body referred to as a so-called groove cam, in which a cam surface (23) extending in the axial direction from the outer periphery of a disk-shaped bottom portion is formed. (19) is connected to a motor output shaft (18) as a main shaft, and a push rod (24) is engaged with a cam surface (23) to form a guide rod (15) integrally formed as a valve body (12). There is one that is moved forward and backward as a driven shaft. Such a cylindrical cam body has an advantage that the driven shaft can be arranged coaxially with the main shaft, compared to what is called a plate cam.
しかしながら、このものはカム体(19)のカム面(23)が、底部より延出する筒部を切断した状態で形成されており、このカム面(23)と従動軸となる案内ロッド(15)の基端部との間に押圧棒(24)を介在させ、案内ロッド(15)と共に押圧棒(24)をカム面(23)に対し、コイルばね(17)を介して常時後退方向に弾圧付勢させた構成となっている。
したがってその構成上、コイルばね(17)を必須の構成部品とし、押圧棒(24)をカム面(23)に対して両端係合により弾圧摺接させなければならず、1回転中に得られる動作カーブに対応したカム面の形状は、カム体(19)を、カム面(23)の全周域を2分した180゜の半周円弧域を利用した対称形状としなければ、案内ロッド(15)を従動させることができず、単純なカム形状による短いストロークのカム駆動しか行えないばかりか、カム面を360゜の全周域に渡って利用形成することは勿論、360゜(1回転)以上のカム面を形成することができず、種々のバリエーション化の図られたカム形状の製作や、長いストロークのカム面をもってカム駆動を行うことができず、板カムに比しそのカム機能が劣るという問題があり、しかも、カム機構は、密封した弁本体ブロック(1a、1b)内に案内ロッド(15)を介して弁体をカム駆動する流量制御弁装置を構成するために採用され、従動軸を直動モータのネジ軸のような他のワーク体に連結駆動するための独立した出力軸として採用することができないものであった。
Therefore, the coil spring (17) is an essential component in the structure, and the pressing rod (24) must be brought into elastic sliding contact with the cam surface (23) by both end engagement, which is obtained during one rotation. The shape of the cam surface corresponding to the operation curve is such that the cam body (19) must be a symmetrical shape using a 180 ° half-circular arc region that bisects the entire peripheral region of the cam surface (23). ) Can not be driven, only a short stroke cam drive with a simple cam shape can be performed, and of course, the cam surface can be formed over the entire circumference of 360 ° (360 ° (one rotation)) The above cam surface cannot be formed, the cam shape can be manufactured in various variations, and the cam can not be driven with a long stroke cam surface. The problem of inferiority In addition, the cam mechanism is employed to construct a flow control valve device that cams the valve body through the guide rod (15) in the sealed valve body block (1a, 1b), and directly drives the driven shaft. It could not be used as an independent output shaft for driving to connect to other work bodies such as a screw shaft of a dynamic motor.
本発明は、上記の如き問題点を一掃すべく創案されたものであって、筒状のカム体により従動軸をカム駆動させるものでありながら、従動軸を、連結される駆動モータの回転出力軸に換わって、直動モータと同様に独立した出力軸として任意のワーク体に連動連結することができ、しかも、種々のバリエーション化の図られたカム形状のカム体を容易に製作でき、連結されるワーク体の要求に応じて最適にカム駆動することのできる出力軸を備えたカム装置を提供することを目的とする。 The present invention was devised to eliminate the above-mentioned problems, and the driven shaft is cam-driven by a cylindrical cam body, and the rotational output of the drive motor connected to the driven shaft is provided. Instead of a shaft, it can be linked to an arbitrary work body as an independent output shaft in the same way as a linear motor, and a cam-shaped cam body with various variations can be easily manufactured and connected. It is an object of the present invention to provide a cam device having an output shaft that can be optimally cam-driven according to the demand of a workpiece to be processed.
上記課題を解決するために本発明が採用した技術手段は、連結されるモータ駆動手段の回動に連動して回転可能に設けられ、円盤状の底部外周から軸線方向に向けて延出する所定のカム面が形成されたカム体と、該カム体の回転によって所定の案内手段に案内されながら、前記カム面に沿って摺接係合する係合片を介して従動する進退移動可能な従動軸とを備えたカム手段であって、該カム手段は、前記カム体を、前記底部と円筒状の筒部とで断面視略コ字状に構成すると共に、前記底部を介してモータ駆動手段の回動に連結可能にケーシング内に収容させ、かつ、前記従動軸を、その基端側に前記係合片を一体的に取着して前記筒部の中心に配設せしめ、先端側をケーシング前面より出没可能に構成せしめる一方、前記カム面を、前記筒部の内周壁面に対して所定のカム溝を形成することにより、押動側カム面と引動側カム面とからなる対面するカム形状で構成せしめ、前記従動軸は、前記カム体の回動に伴って、前記係合片を、前記押動側カム面に形成された登り勾配により押動摺接させて前進方向へ従動せしめ、前記引動側カム面に形成された下り勾配により引動摺接させて後退方向へ従動せしめて、前記連動連結されるモータ駆動手段の出力軸としてカム駆動すべく構成されることを特徴とするものである。 The technical means employed by the present invention to solve the above-mentioned problems are provided in a manner that can rotate in conjunction with the rotation of the motor driving means to be connected, and extend in the axial direction from the outer periphery of the disk-shaped bottom. A cam body having a cam surface formed thereon, and a follower capable of moving forward and backward while being driven by an engagement piece that is slidably engaged along the cam surface while being guided by predetermined guide means by rotation of the cam body. A cam means having a shaft, wherein the cam means is configured such that the cam body is substantially U-shaped in cross-section with the bottom portion and the cylindrical tube portion, and motor driving means is provided via the bottom portion. The driven shaft is housed in the casing so as to be connectable to the rotation, and the engagement piece is integrally attached to the base end side of the driven shaft, and is arranged at the center of the cylindrical portion. The cam surface is configured to be able to protrude and retract from the front surface of the casing, while the cam surface is By forming a predetermined cam groove on the inner peripheral wall surface, it is configured to have a facing cam shape consisting of a pushing cam surface and a pulling cam surface, and the driven shaft is rotated as the cam body rotates. Then, the engagement piece is pushed and slid by the climbing gradient formed on the pushing cam surface and is driven in the forward direction, and the sliding is caused by the descending gradient formed on the dragging cam surface. It is configured to be driven in the backward direction so as to drive the cam as an output shaft of the motor drive means linked to each other.
本発明における出力軸を備えたカム装置は、筒状のカム体により従動軸をカム駆動させるものでありながら、押動側カム面と引動側カム面とによる対面するカム面によって、従動軸と共に係合片を、常時カム面に対して後退方向に弾圧付勢させる構成を採用することなくカム駆動させることができ、コイルバネを不要として構造の簡略化が図れるばかりか、従動軸は、係合片を、押動側カム面と引動側カム面のそれぞれのカム面に沿って摺接案内させることで、往復移動による従動は勿論、周回移動による従動をも採用可能なカム駆動により、連結されるモータ駆動手段の回転出力軸に換わって、任意のワーク体に連動連結し得る進退移動可能なカム駆動モータの出力軸として機能することがてき、しかも、ケーシング内に収容されるカム体は、半回転、1回転、2回転といった任意回転の動作カーブに対応した任意長さのカムストロークをもって、種々のバリエーション化の図られたカム形状のものを取捨選択して採用することが容易となり、ワーク体が要求するカム駆動に応じた最適なカム手段をもって、モータ駆動手段に連動連結するだけでカム駆動モータとして機能させることができる。
The cam device provided with the output shaft in the present invention drives the driven shaft by a cylindrical cam body, but the driven cam surface and the driven cam surface face each other along with the driven shaft. The cam can be driven without adopting a configuration in which the engagement piece is always elastically biased in the backward direction with respect to the cam surface, and not only a coil spring is required, but the structure can be simplified, and the driven shaft is engaged. The pieces are slidably guided along the respective cam surfaces of the push-side cam surface and the pull-side cam surface, so that they can be connected by cam drive that can adopt not only reciprocal movement but also circumferential movement. In place of the rotation output shaft of the motor drive means, the cam body can function as an output shaft of a cam drive motor capable of moving forward and backward which can be interlocked with an arbitrary work body, and is housed in a casing. With a cam stroke of an arbitrary length corresponding to an operation curve of arbitrary rotation such as half rotation, one rotation, and two rotations, it becomes easy to select and adopt cam shapes with various variations. It is possible to function as a cam drive motor simply by interlocking the motor drive means with the optimum cam means corresponding to the cam drive required by the work body.
以下、本発明の実施の形態を、好適な実施の形態として例示するカム装置を図面に基づいて詳細に説明する。
図1はカム駆動モータの縦断全体構成図、図2は前側面図、図3は後側面図である。図に示すように、1はカム駆動モータであって、該カム駆動モータ1は、本発明の出力軸を備えたカム装置としてのカム手段1aと、PM型ステッピングモータ構造のモータ駆動手段1bとを一体的に構成させたものである。モータ駆動手段1bは、ケーシング2を構成する筒状胴部とエンド側部とが一体的(別体でも良い)に形成された断面視略コ字状の円筒ケーシング本体21の内部に、ケーシング本体21の胴部を構成する筒状ヨーク(ステータ)3と、該ヨーク3の内側に回転可能に嵌挿される多極着磁された回転子4を備えて構成される。
前記ヨーク3は、1組のヨークブロック31、31からなり、それぞれコイルボビン32、励磁コイル33を備えて構成される。前記ケーシング本体21は、鉄、磁性ステンレス等により形成され、ヨークブロック31の内周面に回転子4の磁極間隔に対応して複数の凹凸状極歯(図示しない)が定ピッチに形成され、所謂2相のコイルユニットを構成し、前記ヨークブロック31、31同士は、それぞれの極歯がステップ角だけ位置ズレさせて組付けられている。
DESCRIPTION OF THE PREFERRED EMBODIMENTS A cam apparatus that exemplifies an embodiment of the present invention as a preferred embodiment will be described below in detail with reference to the drawings.
1 is an overall longitudinal sectional view of a cam drive motor, FIG. 2 is a front side view, and FIG. 3 is a rear side view. As shown in the figure, reference numeral 1 denotes a cam drive motor. The cam drive motor 1 includes cam means 1a as a cam device having an output shaft according to the present invention, and motor drive means 1b having a PM type stepping motor structure. Are integrally configured. The motor driving means 1b includes a casing body in a cylindrical casing body 21 having a substantially U-shaped cross-sectional view in which a cylindrical body portion and an end side portion constituting the casing 2 are integrally formed (may be separate). A cylindrical yoke (stator) 3 constituting a body portion 21 and a multipolar magnetized rotor 4 that is rotatably inserted inside the yoke 3 are configured.
The yoke 3 includes a pair of yoke blocks 31 and 31 and includes a coil bobbin 32 and an excitation coil 33, respectively. The casing body 21 is made of iron, magnetic stainless steel, or the like, and a plurality of concave and convex pole teeth (not shown) are formed at a constant pitch on the inner peripheral surface of the yoke block 31 corresponding to the magnetic pole interval of the rotor 4. A so-called two-phase coil unit is configured, and the yoke blocks 31 and 31 are assembled such that their pole teeth are displaced by a step angle.
前記回転子4は、その軸芯領域に形成した挿通孔41を有する樹脂製、黄銅、銅またはアルミ等の金属製の円柱(円筒)型のロータカラー42と、該ロータカラー42の外周面に配設されたS極とN極を交互に多極磁着したリング状磁石43とにより構成され、その後端側で、前記ケーシング本体21のエンド側部の中心部に設けられたブッシュ71に回転可能に軸支され、その前端側で、後述するカム体5を保持する筒状の保持体72によって回転可能に保持されている。 The rotor 4 has a columnar (cylindrical) rotor collar 42 made of resin such as brass, copper or aluminum having an insertion hole 41 formed in the axial center region thereof, and an outer peripheral surface of the rotor collar 42. It is composed of a ring-shaped magnet 43 in which S poles and N poles are alternately magnetized in multiple poles, and is rotated on a bush 71 provided at the center of the end side portion of the casing body 21 on the rear end side. It is pivotally supported, and is held rotatably at its front end side by a cylindrical holding body 72 that holds a cam body 5 described later.
前記カム手段1aは、カム装置としてのケーシングをモータ駆動手段1bのケーシング本体21の胴部を延出形成させ、この延出胴部内に、嵌挿されるカム体5と、モータ駆動手段1bと兼用させたフロントキャップ22のケーシング前面より出没する従動軸6が収容されている。
カム体5は、樹脂製(金属製であっても良い)で、円盤形状の底部51と、その外周から軸線方向に向けて延出するカム面53が形成された筒部52とによって、断面視コ字状(凹状)の円筒形状に成形され、回転子4の回動に連動して一体回転可能に設けられている。つまり、このカム体5を回転子4に隣設して連結するにあたり、カム体5とロータカラー42とを底部51で連結させた一体成形品(別体のものを連結しても良い)として同一材質で構成しており、両者が一体回動するよう連結された状態で、カム体5の外周面を樹脂製の保持体72によって摺接回転可能に支持することで、回転子4は、その先端側を保持体72に、基端側をブッシュ71に軸架した構成で回転可能に支持される。この様に、カム体5は、多極磁着したリング状磁石が外装されるロータカラー42と一体成形されているので、軸芯出しが成された成型品として製作することができる。
なお、カム体5をロータカラー42ではなく、従来のモータ駆動手段1bが備える回転出力軸を連結部材として底部51と連結させても良く、また、カム体5自体を軸受することで回転子4の軸受構成に兼用したが、保持体72の筒部を不要とした場合などにはロータカラー42自体を保持体72の基部側で軸受するようにしても良く、保持体72の筒部をカム体5が配設される領域のケーシング2胴部として、モータ駆動手段1bが配設されるケーシング本体21に隣設させて構成しても良い。
The cam means 1a has a casing as a cam device formed by extending the body portion of the casing main body 21 of the motor drive means 1b. The cam body 5 fitted into the extension body portion is also used as the motor drive means 1b. The driven shaft 6 that protrudes and protrudes from the front surface of the casing of the front cap 22 is accommodated.
The cam body 5 is made of resin (or may be made of metal), and has a cross section by a disc-shaped bottom portion 51 and a cylindrical portion 52 in which a cam surface 53 extending from the outer periphery thereof toward the axial direction is formed. It is formed into a U-shaped (concave) cylindrical shape and is provided so as to be integrally rotatable in conjunction with the rotation of the rotor 4. In other words, when connecting the cam body 5 adjacent to the rotor 4, the cam body 5 and the rotor collar 42 are connected to each other at the bottom portion 51 as an integrally formed product (a separate body may be connected). The rotor 4 is composed of the same material, and is supported so that the outer peripheral surface of the cam body 5 can be slidably rotated by a resin-made holding body 72 in a state where both are integrally rotated. The front end side is supported by the holding body 72 and the base end side is rotatably supported by the bush 71. In this manner, the cam body 5 is integrally formed with the rotor collar 42 on which the multi-pole magnetized ring-shaped magnet is mounted, so that the cam body 5 can be manufactured as a molded product that is centered.
The cam body 5 may be connected to the bottom 51 as a connecting member instead of the rotor collar 42 as a rotation output shaft provided in the conventional motor driving means 1b, and the rotor 4 can be supported by bearing the cam body 5 itself. However, when the cylindrical portion of the holding body 72 is not required, the rotor collar 42 itself may be supported on the base side of the holding body 72, and the cylindrical portion of the holding body 72 is camped. The casing 2 body portion in the region where the body 5 is disposed may be configured adjacent to the casing body 21 where the motor driving means 1b is disposed.
また、カム体5の中心部には、カム体5の回転によって所定の案内手段に案内されながらカム面53の起伏形状に沿って従動する進退移動可能な従動軸6が備えられている。
従動軸6は、円柱軸の外周対向面をD字状(円弧状)に2面切欠きした断面視太鼓状に形成されており、その先端側をケーシング2のフロント側部を構成するフロントキャップ22(モータ駆動手段1bと兼用)に設けられた軸受部材221の軸受部222に廻り止めされて進退移動可能に案内支持される。軸受部222は、従動軸6の廻り止め形状に適合した軸孔形状のブッシュにより構成される。一方、従動軸6の基端側は、円柱状の基盤62中心にしっかりと嵌着されており、基盤62を介してカム面53に両端係合する係合片61、61が設けられている。基盤62は、カム体5の直径が大きくなりカム面53が軸芯からの距離を要する場合に、係合片61の長さを短く設定し、負荷を分散軽減する機能を有し、係合片61は、従動軸6の移動時にその先端部が保持体72の筒部内壁面に当接し、ブレ防止片として機能する。これにより、従動軸6は、先端側の軸受部222と、基端側の係合片61をブレ規制する保持体72とにより構成される案内手段に案内されながら、カム体5の回転に伴ってカム面53の起伏形状に沿って従動し、従動軸6が軸受部222から外部へ出没する、所謂ワーク体に連動連結されるモータ出力軸として機能するようになっている。
The cam body 5 is provided with a follower shaft 6 capable of moving forward and backward along the undulating shape of the cam surface 53 while being guided by predetermined guide means by the rotation of the cam body 5.
The driven shaft 6 is formed in a drum shape in cross-sectional view in which the outer peripheral facing surface of the cylindrical shaft is cut into two D-shapes (arc-shaped), and the front end of the driven shaft 6 forms the front side portion of the casing 2. 22 (also used as motor drive means 1b) is supported by a bearing portion 222 of a bearing member 221 provided so as to be movable forward and backward. The bearing portion 222 is configured by a shaft-hole-shaped bush that is adapted to the non-rotating shape of the driven shaft 6. On the other hand, the base end side of the driven shaft 6 is firmly fitted to the center of the columnar base 62 and is provided with engagement pieces 61 and 61 that engage with the cam surface 53 via the base 62. . The base 62 has a function of reducing the load distribution by reducing the length of the engagement piece 61 when the diameter of the cam body 5 is increased and the cam surface 53 requires a distance from the shaft center. The tip of the piece 61 abuts against the inner wall surface of the cylindrical portion of the holding body 72 when the driven shaft 6 moves, and functions as an anti-shake piece. As a result, the driven shaft 6 is guided by the guide means constituted by the bearing portion 222 on the distal end side and the holding body 72 that restricts the engagement piece 61 on the proximal end side as the cam body 5 rotates. The cam shaft 53 is driven along the undulating shape of the cam surface 53, and the driven shaft 6 functions as a motor output shaft that is interlocked and connected to a so-called workpiece body that protrudes and retracts from the bearing portion 222 to the outside.
さらに、従動軸6の基端側は、先端側の軸受部222と共に案内手段を構成すべく設けられた軸受部8によってスライド可能に案内支持されている。この軸受部8は、基端部がヨーク3の筒孔中心となるケーシング2の後面に固定され、先端側部が回転子4の軸芯に形成した挿通孔41を非接触で貫通し、カム体5の筒内にまで達する長さの案内軸81と、該案内軸81に挿入される従動軸6の基端側となる軸芯に形成した案内孔82とで構成される。案内軸81は、案内孔82に対してスライド可能に案内支持されるよう挿入され、その挿入長さは、カム面53の起伏による最大移動ストローク量を超えても、嵌挿解離されない長さに設定されている。なお、案内軸81は、その基端部をケーシング2の後面に固定させて立設したが、カム体底部51の軸芯に直接立設させて案内孔82内に挿入するようにしても良い。
この様に構成すると、従動軸6の案内孔82内に案内軸81の案内ストロークを形成することができ、従動軸6は、基端側において、係合片61、61の先端を保持体72の内壁面に当接させてブレを規制するようにして案内手段として機能させる必要がない。
また、案内軸81は、ブッシュ71を固定する固定部材にも兼用されている。なお、案内軸81は円柱の軸体を用いたが、従動軸6と同様に断面視太鼓状の軸体を用いて、これに対応した案内孔82内に回り止め挿入すれば、従動軸6を円柱の軸体として形成できる。
Further, the base end side of the driven shaft 6 is slidably guided and supported by a bearing portion 8 provided to form a guiding means together with the bearing portion 222 on the distal end side. The bearing portion 8 is fixed to the rear surface of the casing 2 whose base end portion is the center of the cylindrical hole of the yoke 3, and the tip side portion penetrates the insertion hole 41 formed in the shaft core of the rotor 4 in a non-contact manner. The guide shaft 81 is long enough to reach the inside of the cylinder of the body 5 and the guide hole 82 is formed in the shaft core on the base end side of the driven shaft 6 inserted into the guide shaft 81. The guide shaft 81 is inserted so as to be slidably guided and supported with respect to the guide hole 82, and the insertion length thereof is a length that does not allow insertion and disengagement even when the maximum movement stroke amount due to the undulation of the cam surface 53 is exceeded. Is set. Although the guide shaft 81 is erected with its base end fixed to the rear surface of the casing 2, it may be erected directly on the shaft core of the cam body bottom 51 and inserted into the guide hole 82. .
With this configuration, a guide stroke of the guide shaft 81 can be formed in the guide hole 82 of the driven shaft 6, and the driven shaft 6 has the distal ends of the engagement pieces 61, 61 on the proximal end side and the holding body 72. There is no need to function as a guide means by restricting blurring by abutting against the inner wall surface.
The guide shaft 81 is also used as a fixing member that fixes the bush 71. The guide shaft 81 is a cylindrical shaft. However, if the shaft is a drum-like shaft in cross-section as in the case of the driven shaft 6 and is inserted into the guide hole 82 corresponding thereto, the driven shaft 6 Can be formed as a cylindrical shaft.
図4は従動軸6の基端側を案内支持する案内手段の他の実施例を示すカム駆動モータの縦断全体構成図である。この図に示すように、従動軸6の基端側は、先端側の軸受部222と共に案内手段を構成すべく設けられた軸受部8aによって案内支持されている。この軸受部8aは、従動軸6の基端側に回転子4の挿通孔41に非接触で挿入すべく延出形成した案内軸81aと、該案内軸81aを案内支持すべくカム体5の底部51の軸芯に設けたリング状ブッシュ82aとで構成される。案内軸81aとブッシュ82aとの軸受公差は任意であり、案内軸81aの挿通孔41内への挿入長さは、カム面53の起伏による最大移動ストローク量を超えても、嵌挿解離されない長さに設定されている。
この様に構成すると、回転子4の挿通孔41内に案内軸81aの案内ストロークを形成することができ、従動軸6は、基端側において、係合片61、61の先端を保持体72の内壁面に当接させてブレを規制する案内手段として機能させる必要がない。
FIG. 4 is an overall longitudinal sectional view of a cam drive motor showing another embodiment of the guide means for guiding and supporting the base end side of the driven shaft 6. As shown in this figure, the base end side of the driven shaft 6 is guided and supported by a bearing portion 8a provided together with the bearing portion 222 on the distal end side so as to constitute guide means. The bearing portion 8a includes a guide shaft 81a extending to be inserted into the insertion hole 41 of the rotor 4 in a non-contact manner on the proximal end side of the driven shaft 6, and a cam body 5 for guiding and supporting the guide shaft 81a. It is comprised with the ring-shaped bush 82a provided in the axial center of the bottom part 51. FIG. The bearing tolerance between the guide shaft 81a and the bush 82a is arbitrary, and the insertion length of the guide shaft 81a into the insertion hole 41 is long enough not to be inserted and disengaged even when the maximum movement stroke amount due to the undulation of the cam surface 53 is exceeded. Is set.
With this configuration, the guide stroke of the guide shaft 81 a can be formed in the insertion hole 41 of the rotor 4, and the driven shaft 6 has the distal ends of the engagement pieces 61, 61 at the proximal end side and the holding body 72. There is no need to function as guide means for restricting blurring by abutting against the inner wall surface.
図5はカム体5の筒部52に施されたカム面53のカム形状を示す展開図であり、カム面53は、筒部52の内周壁面に対して所定のカム溝53aを形成することにより、押動側カム面531と引動側カム面532とが対面する蛇行状のカム形状で構成される。つまり、このカム体5は、係合片61をカム溝53aの形状に沿って案内する案内溝として機能させ、筒部52の長さを可変することにより、カム溝53aの面域、即ち、カム面53の長さを拡張することができるものであり、カム溝53aは、筒部52を軸線方向に延設させて、幾周ものスパイラル状とするなど任意に形成できるようになっている。また、カム溝53aは、全てのカム面域で係合片61の案内できる幅に形成する必要はなく、係合片61の幅よりも広幅に形成し、或いは、押動側と引動側カム面の帯状溝の一部面域に、例えば一方が平滑面で他方が湾曲面として異なしめて対面させても良い。この様に構成すると、帯状溝の全部または一部分に広幅なカム溝53aが形成され、広幅なカム溝53a部分において、係合片61の先端を挿入させての従動軸6のセット作業が容易に行えると共に、連結されたワークが従動軸6の従動から解離され、ワーク側で自由に動作が行える領域として機能することができる。 FIG. 5 is a development view showing the cam shape of the cam surface 53 applied to the cylindrical portion 52 of the cam body 5, and the cam surface 53 forms a predetermined cam groove 53 a with respect to the inner peripheral wall surface of the cylindrical portion 52. Thus, the push cam surface 531 and the pull cam surface 532 are formed in a meandering cam shape. That is, the cam body 5 functions as a guide groove that guides the engagement piece 61 along the shape of the cam groove 53a, and by changing the length of the cylindrical portion 52, the surface area of the cam groove 53a, that is, The length of the cam surface 53 can be expanded, and the cam groove 53a can be arbitrarily formed by extending the cylindrical portion 52 in the axial direction to form a spiral shape around the circumference. . Further, the cam groove 53a does not need to be formed to have a width that can guide the engaging piece 61 in all the cam surface areas, and is formed wider than the width of the engaging piece 61, or the push side and the pull side cam. For example, one surface area of the belt-like groove of the surface may be made different as a smooth surface and the other as a curved surface. With this configuration, the wide cam groove 53a is formed in all or a part of the belt-like groove, and the setting operation of the driven shaft 6 with the distal end of the engagement piece 61 inserted in the wide cam groove 53a portion is easy. In addition, the connected work is disengaged from the follower shaft 6 and can function as a region where the work can be freely operated.
図5(A)は、本実施例のカム面53のカム溝形状を示すもので、相似形のカム形状を組として2本のカム溝53a、53aを対称に対向せしめて切り抜き穿設して形成したカム体5aであり、一対の係合片61、61が、それぞれのカム面に両端係合されて摺接案内するようになっている。この2本のカム溝53aは、筒部52の内周壁面の約3/4(270゜)の円周域に対して、始部(カム起伏の底部)から緩やかなスロープ部を介して終部(カム起伏の平滑頂部)に至るカム形状として、一方のカム溝53aの始部域と他方のカム溝53aの終部域が同じ周域を重合する態様で形成されている。なお、この重合域の長さは任意に設定でき、重合させないことも任意であることは勿論である。 FIG. 5 (A) shows the cam groove shape of the cam surface 53 of this embodiment, and the two cam grooves 53a and 53a are symmetrically opposed to each other with a similar cam shape as a pair. The formed cam body 5a is configured such that a pair of engagement pieces 61, 61 are engaged with the respective cam surfaces at both ends and are slidably guided. The two cam grooves 53a end with respect to a circumferential area of about 3/4 (270 °) of the inner peripheral wall surface of the cylindrical portion 52 from the start portion (the bottom portion of the cam undulation) via a gentle slope portion. As a cam shape reaching the portion (smooth top portion of the cam undulation), the start region of one cam groove 53a and the end region of the other cam groove 53a are formed in such a manner that they overlap the same peripheral region. Of course, the length of this polymerization zone can be set arbitrarily, and it is of course optional not to polymerize.
一方、図5(B)は、カム溝形状の他の実施例を示すもので、図6に示す係合片61のように1本のカム面53に対して片持ち係合(両端係合の場合は図(A)の様に対向する2つのカム溝で構成する)させたものに適用されるカム体5bである。このカム体5bは、カム面53が、押動側カム面531を、始部から終部間において下り勾配の無いカム形状とし、引動側カム面532を、終部から始部間において登り勾配の無いカム形状として形成され、係合片61を、前記始部から終部までの区間において、カム体5bの正転回動では押動側カム面531を往路とし、逆転回動では引動側カム面532を復路として往復移動すべく構成されている。つまり、カム面53は、筒部52の内周壁面を2周する720゜の円周域に対して、始部(カム起伏の底部)から270゜までの緩やかな第1スロープ部、540゜までの平滑部、第1スロープ部の約2倍の傾斜角に設定された690゜までの第2スロープ部、平滑部を介して終部(カム起伏の頂部)に至るスパイラル状のカム形状として、係合片61が案内される態様で形成されている。なお、上昇スロープ部だけでなく下降スロープ部の設定や、平滑部との組合せなど、スパイラル状のカム面53を種々の起伏形状のカム溝曲線に設定することは任意であり、また、カム体5aのように対向配置させることも任意である。 On the other hand, FIG. 5B shows another embodiment of the cam groove shape, and cantilever engagement (both-end engagement) with one cam surface 53 like the engagement piece 61 shown in FIG. In this case, the cam body 5b is applied to a structure formed by two cam grooves facing each other as shown in FIG. In this cam body 5b, the cam surface 53 has a push-side cam surface 531 in a cam shape with no downward slope from the start to the end, and the pull-side cam surface 532 has an upward slope from the end to the start. In the section from the start to the end, the engaging piece 61 has a pushing cam surface 531 as a forward path for forward rotation of the cam body 5b and a pulling side cam for reverse rotation. It is configured to reciprocate using the surface 532 as a return path. In other words, the cam surface 53 has a gentle first slope portion 540 ° from the start portion (bottom portion of the cam undulation) to 270 ° with respect to a circumferential region of 720 ° that makes two rounds on the inner peripheral wall surface of the cylindrical portion 52. As a spiral cam shape that reaches the end (the top of the cam undulation) through the smooth part and the second slope part up to 690 °, which is set to an inclination angle approximately twice that of the first slope part The engaging piece 61 is formed in a guided manner. It is optional to set the spiral cam surface 53 to various undulating cam groove curves, such as the setting of not only the rising slope portion but also the falling slope portion and the combination with the smooth portion. It is also optional to arrange them oppositely as in 5a.
図5(C)は、カム形状の他の実施例を示すもので、係合片61を片持ち係合と両端係合の何れにもそのカム形状により対応して適用されるが、本実施例においては片持ち係合に適用したカム形状のカム体5cとなっている。つまり、このカム体5cは、カム溝53aを、筒部52の外周壁面を残した内周壁面に対して凹状溝に切欠きや型抜き等で形成、或いは、カム体5a、5bのものに筒部材を嵌挿させる等により形成せしめ、係合片61がカム溝53aを周回できるよう環状(リング状)に形成されている。カム面53は、360゜のカム溝53aのうち180゜までのカムストローク域に、平滑部から90゜分を緩やかに立上るスロープ溝を存して円弧状の頂部に至り、該頂部から40゜分の下りスロープ溝を経て平滑部に至る登り勾配と下り勾配からなる起伏部形状に形成され、さらに180゜から360゜までの平滑部が形成されている。なお、係合片61を両端係合させる場合には、0゜から180゜のカムストローク域に形成したカム形状と同じものを、180゜から360゜のカムストローク域に形成させればよい。 FIG. 5C shows another embodiment of the cam shape, and the engagement piece 61 is applied to both the cantilever engagement and the both-end engagement depending on the cam shape. In the example, it is a cam-shaped cam body 5c applied to cantilever engagement. That is, the cam body 5c is formed by forming the cam groove 53a into a concave groove with respect to the inner peripheral wall surface leaving the outer peripheral wall surface of the cylindrical portion 52, or by forming a cam groove 5a, 5b. The engagement member 61 is formed in an annular shape (ring shape) so as to be able to go around the cam groove 53a. The cam surface 53 has a slope groove that gradually rises by 90 ° from the smooth portion in the cam stroke region up to 180 ° of the 360 ° cam groove 53a, and reaches the arcuate top. It is formed into a undulating portion shape consisting of an ascending gradient and a descending gradient through a descending slope groove of .degree. To the smooth portion, and further a smooth portion of 180.degree. To 360.degree. Is formed. When the engagement piece 61 is engaged at both ends, the same cam shape formed in the cam stroke region from 0 ° to 180 ° may be formed in the cam stroke region from 180 ° to 360 °.
このように、モータ駆動手段1bの回動に連動して回転可能に設けられたカム手段1aの従動軸6は、カム体5の回転に伴って、係合片61がカム溝53aに案内されることによりカム駆動し、フロントキャップ22のケーシング前面となる軸受部222より出没する。図5(A)、(B)に示す始部と終部よりなるカム溝53aが形成されたカム体5a、5bよって従動軸6をカム駆動する場合には、係合片61が始部から終部間を往復駆動する。つまり、モータ駆動手段1bの正逆駆動で制御により、正転駆動時には往路となる押動側カム面531上を、逆転駆動時には復路となる引動側カム面532上を、それぞれ係合片61が従動案内されながら往復移動して、従動軸6をモータ駆動手段1bの出力軸としてカム駆動させる。なお、本実施例では、カム駆動モータ1として一体的に構成したものを例示したが、特許文献1に開示されたもののように底部51の中心にモータの出力軸を連結させて構成しても良い。 As described above, the follower shaft 6 of the cam means 1a that is rotatably provided in conjunction with the rotation of the motor drive means 1b has the engaging piece 61 guided to the cam groove 53a as the cam body 5 rotates. As a result, the cam is driven, and the front cap 22 protrudes and protrudes from the bearing portion 222 which is the front surface of the casing. When the driven shaft 6 is cam-driven by the cam bodies 5a and 5b in which the cam groove 53a having the start portion and the end portion shown in FIGS. 5A and 5B is formed, the engagement piece 61 is moved from the start portion. Drives back and forth between the ends. That is, the engagement pieces 61 are respectively controlled on the push-side cam surface 531 which is the forward path during forward rotation driving and on the driving-side cam surface 532 which is the backward path during reverse rotation driving by the forward / reverse drive of the motor driving means 1b. Reciprocating while being driven and guided, the driven shaft 6 is cam-driven as the output shaft of the motor driving means 1b. In the present embodiment, the cam drive motor 1 is illustrated as an integral configuration, but the motor output shaft may be connected to the center of the bottom 51 as disclosed in Patent Document 1. good.
図5(A)に示す単純なカム形状が施されたカム体5aを用いる場合には、係合片61が始部から終部までを単純に往復移動を繰り返すカム駆動がなされ、例えば、開閉、出没などの動作を行うワークに適している。
また、図5(B)に示す複合的な形状のカム溝53aが施されたカム体5bを用いる場合には、係合片61が始部から終部までを単純に往復駆動を繰り返す制御は勿論であるが、始部0゜から終部720゜に至る中間域に形成された平滑部を中間点として、始部0゜から平滑部360゜間に形成されるカム溝53aを利用した第1のカム駆動域と、平滑部360゜から終部720゜間に形成されるカム溝53aを利用した第2のカム駆動域との組合せによって、従動軸6を進退駆動制御することができる。例えば、弁開閉制御などのワークにおいて、従動軸6に連動連結される弁体を、併設された2つの流口A・Bをそれぞれ開閉制御する際に、係合片61が始部に位置する場合には流口A・B共に開とし、第1のカム駆動域では流口Aを閉、流口Bを開とし、これを平滑部360゜部でモータ停止して位置決め保持し、その後、第2のカム駆動域により前記流口Aの閉を開、流口Bの開を閉とし、これを平滑部720゜部(終部)でモータ停止し位置決めするなどの複雑なカム駆動制御を可能としている。なお、平滑部におけるモータ停止による位置決め保持は、非通電(無励磁)状体でも従動軸6の自己保持ができるものである。
When the cam body 5a having a simple cam shape shown in FIG. 5 (A) is used, the engagement piece 61 is cam-driven so as to simply reciprocate from the start to the end. Suitable for work that performs operations such as in / out.
Further, when using the cam body 5b provided with the complex-shaped cam groove 53a shown in FIG. 5 (B), the control of the engagement piece 61 to simply reciprocate from the start to the end is as follows. Needless to say, a smooth groove formed in the intermediate region from the start portion 0 ° to the end portion 720 ° is used as an intermediate point, and the cam groove 53a formed between the start portion 0 ° and the smooth portion 360 ° is used. The driven shaft 6 can be driven forward and backward by a combination of one cam drive region and a second cam drive region using a cam groove 53a formed between the smooth portion 360 ° and the end portion 720 °. For example, in a workpiece such as valve opening / closing control, the engagement piece 61 is positioned at the beginning when the valve body linked to the driven shaft 6 is controlled to open / close the two flow ports A and B provided side by side. In this case, both the flow ports A and B are opened, and in the first cam drive region, the flow port A is closed and the flow port B is opened, and the motor is stopped and held at the smooth portion 360 °. The second cam drive region opens the flow port A and opens the flow port B, and performs complicated cam drive control such as positioning and stopping the motor at the smooth portion 720 ° (end portion). It is possible. Note that the positioning and holding by the motor stop in the smoothing section is such that the driven shaft 6 can be self-held even in a non-energized (non-excited) state.
また、図5(C)に示す形状のカム溝53aが施されたカム体5cを用いる場合には、係合片61がカム溝53aを周回することにより、起伏部の形状に沿った従動を平滑部を経て間欠的に繰り返すカム駆動がなされ、例えば、開閉、出没などの間欠動作を伴うワークに適している。
図6はカム体5cを適用した実施例を示すもので、この図に示すように、カム手段1aは、係合片61が、回転するカム体5aのカム溝53aに沿って片持ち係合しながら周回動作することで、回転規制された従動軸6を従動させてカム駆動するように構成される。この片持ち係合による係合片61は、従動軸6の基端側を、先端側の軸受部222と共に軸受部8(8a)によって案内支持する構成を採用することにより、容易に実現することができる。つまり、従動軸6は、モータ駆動手段1bの回転駆動で、起伏部形状の登り勾配となる押動側カム面531に沿って係合片61が突出方向に押動され、下り勾配となる引動側カム面532に沿って係合片61が没入方向に引き動され、平滑部では押動側カム面531と引動側カム面532間に案内されながら、モータ駆動手段1bの出力軸としてカム駆動される。なお、係合片61を往復移動させて従動させても良い。
5C, when the cam body 5c provided with the cam groove 53a having the shape shown in FIG. 5C is used, the engagement piece 61 circulates the cam groove 53a, so that the follow along the shape of the undulating portion is performed. The cam drive is intermittently repeated through the smoothing portion, and is suitable for, for example, a work involving intermittent operations such as opening and closing and raising and lowering.
FIG. 6 shows an embodiment in which the cam body 5c is applied. As shown in FIG. 6, the cam means 1a has the engagement piece 61 that is cantilevered along the cam groove 53a of the rotating cam body 5a. By rotating around, the driven shaft 6 whose rotation is restricted is driven to drive the cam. The engagement piece 61 by the cantilever engagement can be easily realized by adopting a configuration in which the proximal end side of the driven shaft 6 is guided and supported by the bearing portion 8 (8a) together with the bearing portion 222 on the distal end side. Can do. In other words, the driven shaft 6 is driven by the rotational drive of the motor driving means 1b, and the engaging piece 61 is pushed in the protruding direction along the pushing side cam surface 531 which is the rising slope of the undulating portion shape, and the driven shaft 6 is drawn downward. The engaging piece 61 is pulled in the immersing direction along the side cam surface 532, and is cam-driven as the output shaft of the motor driving means 1b while being guided between the pushing side cam surface 531 and the drawing side cam surface 532 in the smooth portion. Is done. The engagement piece 61 may be reciprocated and driven.
叙述の如く構成された本発明の実施例の形態において、いま、モータ駆動手段1bの回動に連動して、カム手段1aを構成する従動軸6は、カム体5(5a〜c)に形成されたカム溝53aに沿って従動しながら進退移動するのであるが、本発明における出力軸を備えたカム装置(カム手段1a)は、カム体5を、円盤状の底部51と円筒状の筒部52とで断面視略コ字状に構成すると共に、底部51を介してモータ駆動手段1bの回動に連結可能にケーシング2内に収容させ、かつ、従動軸6を、その基端部側に係合片61を一体的に取着して筒部52の中心に配設せしめ、その先端側をケーシング前面(フロントキャップ22の軸受部222前面)より出没可能に構成せしめる一方、カム体5を、底部51と円筒状の筒部52とで断面視略コ字状に構成すると共に、カム面53を、筒部52の内周壁面に対して所定のカム溝53aを形成することにより、押動側カム面531と引動側カム面532とからなる対面するカム形状で構成せしめ、従動軸6は、カム体5の回動に伴って、係合片61を、押動側カム面531に形成された登り勾配により押動摺接させて前進(突出)方向へ従動せしめ、引動側カム面532に形成された下り勾配により引動摺接させて後退(没入)方向へ従動せしめて、連動連結されるモータ駆動手段1bの出力軸としてカム駆動すべく構成されている。 In the embodiment of the present invention configured as described above, the driven shaft 6 constituting the cam means 1a is formed on the cam body 5 (5a to 5c) in conjunction with the rotation of the motor driving means 1b. The cam device (cam means 1a) having an output shaft according to the present invention moves the cam body 5 into a disc-shaped bottom 51 and a cylindrical tube. The portion 52 is configured to be substantially U-shaped in cross section, and is accommodated in the casing 2 so as to be connectable to the rotation of the motor driving means 1b via the bottom 51, and the driven shaft 6 is disposed on the base end side. On the other hand, the engaging piece 61 is integrally attached to the cylindrical portion 52 and disposed at the center of the cylindrical portion 52. The front end of the engaging piece 61 can be projected and retracted from the front surface of the casing (the front surface of the bearing portion 222 of the front cap 22). In section view with bottom 51 and cylindrical tube 52 The cam surface 53 is formed in a U-shape, and a predetermined cam groove 53 a is formed on the inner peripheral wall surface of the cylindrical portion 52, so that the facing surface composed of the push side cam surface 531 and the pull side cam surface 532 is formed. The driven shaft 6 advances (protrudes) by causing the engaging piece 61 to come into sliding sliding contact with the climbing gradient formed on the driving cam surface 531 as the cam body 5 rotates. ), Driven by sliding down by the downward slope formed on the pulling side cam surface 532, driven in the backward (immersive) direction, and driven as a cam as the output shaft of the motor drive means 1b that is interlocked. Has been.
これにより、カム体5により従動軸6をカム駆動させるものでありながら、押動側カム面531と引動側カム面532とによる対面するカム面53によって、従動軸6と共に係合片61を、常時カム面53に対して後退方向に弾圧付勢させる構成を採用することなくカム駆動させることができ、コイルバネを不要として構造の簡略化が図れるばかりか、回転子4と共に一体回動するカム体5の回転が係合片61を介して従動軸6に推力として伝達され、従動軸6は、係合片61を、押動側カム面531と引動側カム面532のそれぞれのカム面53に沿って摺接案内させることで、往復移動による従動は勿論、周回移動による従動をも採用可能なカム駆動により、連結されるモータ駆動手段1bの回転出力軸に換わって、任意のワーク体に連動連結し得る進退移動可能なカム駆動モータ1の出力軸として機能することがてき、しかも、ケーシング2内に収容されるカム体5は、半回転、1回転、2回転といった任意回転の動作カーブに対応した任意長さのカムストロークをもって、種々のバリエーション化の図られたカム形状のものを取捨選択して採用することが容易となり、ワーク体が要求するカム駆動に応じた最適なカム手段1aをもって、モータ駆動手段1bに連動連結するだけでカム駆動モータ1として機能させることができる。 As a result, while the driven shaft 6 is cam-driven by the cam body 5, the engaging piece 61 is moved together with the driven shaft 6 by the cam surface 53 facing the pushing side cam surface 531 and the driving side cam surface 532. The cam body can be driven without adopting the configuration in which the cam surface 53 is always urged against the cam surface 53, and the structure can be simplified by eliminating the need for a coil spring. 5 is transmitted as a thrust to the driven shaft 6 via the engagement piece 61, and the driven shaft 6 moves the engagement piece 61 to the respective cam surfaces 53 of the push side cam surface 531 and the drive side cam surface 532. By sliding and guiding along, the cam can be driven not only by reciprocating movement but also by revolving movement, so that it can be connected to an arbitrary work body instead of the rotation output shaft of the motor driving means 1b to be connected. It can function as an output shaft of the cam drive motor 1 that can be connected and moved forward and backward, and the cam body 5 accommodated in the casing 2 has an operation curve of arbitrary rotation such as half rotation, one rotation, and two rotations. It is easy to select and adopt variously modified cam shapes with a corresponding arbitrary length of cam stroke, and has the optimum cam means 1a corresponding to the cam drive required by the work body. The cam drive motor 1 can be made to function only by interlocking connection with the motor drive means 1b.
また、従動軸6は、カム溝53aを、カム体筒部52の外周壁面を残した内周壁面に対して環状に形成せしめ、係合片61が該カム溝53aを周回することでカム駆動すべく構成されているので、従動軸6を、単純な開閉、出没などの繰り返しを間欠動作を伴って行うワークに連結するだけで、係合片61の往復移動による従動と周回移動による従動とのカム駆動制御を行えるカム駆動モータ1として機能させることができる。 Further, the driven shaft 6 has a cam groove 53a formed in an annular shape with respect to the inner peripheral wall surface of the cam cylinder portion 52, and the engagement piece 61 goes around the cam groove 53a to drive the cam. Since the driven shaft 6 is simply connected to a workpiece that is repeatedly opened / closed and retracted with intermittent operation, the driven piece 6 can be driven by reciprocating movement of the engagement piece 61 and driven by circular movement. It is possible to function as a cam drive motor 1 that can perform cam drive control.
また、従動軸6は、カム溝53aが始部と終部を有し、該始部から終部までの区間を、係合片61がカム体5の正逆回動に伴って往復移動することでカム駆動すべく構成されているので、従動軸6を、相似形のカム形状を組として対称に対向せしめて形成した2本のカム溝53a、53aに対して、一対の係合片61、61のそれぞれを両端係合させ、軸芯ズレを軽減させた状態での摺接案内により、始部から終部までの区間を往復移動させることが可能となり、連結されるモータ駆動手段1bを、その正逆駆動でカム駆動制御が行えるカム駆動モータ1として機能させることができる。 In the driven shaft 6, the cam groove 53 a has a start portion and an end portion, and the engagement piece 61 reciprocates along the forward / reverse rotation of the cam body 5 in the section from the start portion to the end portion. Therefore, the pair of engagement pieces 61 are formed in the two cam grooves 53a and 53a formed by causing the driven shaft 6 to be symmetrically opposed to each other with a similar cam shape as a set. , 61 can be reciprocated in the section from the start to the end by sliding contact guidance in a state where both ends are engaged and the axial misalignment is reduced. The cam drive motor 1 can perform the cam drive control by the forward / reverse drive.
さらに、カム面53を、前記始部から終部に至る中間域に平滑部を形成し、該平滑部を中間点として、前記始部から前記平滑部の間に形成される第1のカム駆動域と、平滑部から終部の間に形成される第2のカム駆動域とで構成し、従動軸6は、係合片61を、前記第1のカム駆動域のカム溝53aに沿った往復移動と、前記第2のカム駆動域のカム溝53aに沿った往復移動との組合せ設定によってカム駆動すべく構成されているので、従動軸6を、始部から終部間のカムストローク域に形成されたそれぞれ異なるカム形状のを用いて、複合的なカム駆動制御が要求されるワークに適用したカム駆動モータ1として機能させることができる。 Further, the cam surface 53 is formed with a smooth portion in an intermediate region from the start portion to the end portion, and the first cam drive formed between the start portion and the smooth portion with the smooth portion as an intermediate point. And the second cam drive region formed between the smooth portion and the end portion. The driven shaft 6 has the engagement piece 61 along the cam groove 53a of the first cam drive region. Since it is configured to drive the cam by a combination setting of the reciprocating movement and the reciprocating movement along the cam groove 53a of the second cam driving area, the driven shaft 6 has a cam stroke area between the start part and the end part. By using the different cam shapes formed in the above, it is possible to function as a cam drive motor 1 applied to a work requiring complex cam drive control.
また、カム体5は、ロータカラー42と一体成形されたカム駆動モータ1として構成されているので、回転子4の軸芯に、従来配設されていた回転伝達用の出力軸(主軸)を殊更設ける必要が無く不要とし得る結果、その軸芯領域に形成した挿通孔41を、回転子4の回転とは切り離された回動伝達されない領域として利用できるようになり、案内軸81の配設や、係合片61を配設して従動軸6の移動ストローク域として設定するなど、様々な構成で従動軸6の基部側を案内支持することを可能ならしめると共に、カム手段1aとモータ駆動手段1bとの連動連結構造が簡素化され、カム面の全周利用は勿論、種々のカム形状に追随した長ストロークのカム駆動を実現できる。 Further, since the cam body 5 is configured as the cam drive motor 1 integrally formed with the rotor collar 42, the rotation transmission output shaft (main shaft) that has been conventionally provided is arranged on the shaft core of the rotor 4. As a result, the insertion hole 41 formed in the shaft core region can be used as a region that is separated from the rotation of the rotor 4 and is not transmitted, and the guide shaft 81 is disposed. In addition, it is possible to guide and support the base side of the driven shaft 6 with various configurations, such as setting the moving stroke area of the driven shaft 6 by disposing the engaging piece 61, and driving the cam means 1a and the motor. The interlocking connection structure with the means 1b is simplified, and it is possible to realize long stroke cam driving following various cam shapes as well as use of the entire circumference of the cam surface.
さらに、回転子4とカム体5とが一体的に連結されているので、回転子4は、その基端側とカム体5が連結された先端側をそれぞれ回転可能に支持する構成、即ち、回転子4の基端側をブッシュ71を回転可能に支持し、先端側を、連結されたカム体5の外周面を摺接する保持体72を介して回転可能に支持する構成として、カム体5自体を回転子4の一部として軸架することができる。 Furthermore, since the rotor 4 and the cam body 5 are integrally connected, the rotor 4 is configured to rotatably support the base end side and the distal end side to which the cam body 5 is connected, that is, The cam body 5 is configured such that the proximal end side of the rotor 4 is rotatably supported by the bush 71 and the distal end side is rotatably supported via a holding body 72 that is in sliding contact with the outer peripheral surface of the connected cam body 5. It can be pivoted as part of the rotor 4.
また、前記案内手段は、挿通孔41を利用して、従動軸(出力軸)6を、先端側と基端側でそれぞれ案内支持する軸受部222と8(8a)で構成することを可能としている。
たとえば、基端側の軸受部8を、基端部がヨーク3の筒孔中心となるケーシング2の後面に固定され、先端側部が回転子4の軸芯に形成した挿通孔41を通してカム体5内に達する案内軸81と、該案内軸81に挿入される従動軸6の軸芯に形成した案内孔82とにより構成することができ、従動軸6は、自身に形成された案内孔82内を案内軸81の案内ストローク域として、回転子4の回転とは切り離された移動可能な案内支持構造とすることができ、その基端側において、係合片61の先端を保持体72の内壁面に当接させてブレを規制するようにした案内手段によらなくても軸受することができるばかりか、案内軸81を、ブッシュ71を固定する固定部材として兼用することができる。
Further, the guide means can use the insertion hole 41 to configure the driven shaft (output shaft) 6 with bearing portions 222 and 8 (8a) that guide and support the distal end side and the proximal end side, respectively. Yes.
For example, the bearing body 8 on the base end side is fixed to the rear surface of the casing 2 whose base end portion is the center of the cylindrical hole of the yoke 3, and the cam body is inserted through the insertion hole 41 formed on the shaft core of the rotor 4. 5 and a guide hole 82 formed in the axis of the driven shaft 6 inserted into the guide shaft 81. The driven shaft 6 is formed in the guide hole 82 formed in itself. The inside of the guide shaft 81 can be used as a movable guide support structure separated from the rotation of the rotor 4, and the distal end of the engagement piece 61 can be connected to the holding body 72 on the base end side. Bearings can be provided without using the guide means that abuts against the inner wall surface to regulate blurring, and the guide shaft 81 can also be used as a fixing member for fixing the bush 71.
あるいは、また、基端側の軸受部8aを、従動軸6の基端側に回転子の軸芯に形成した挿通孔41に挿入すべく延出形成した案内軸81aと、該案内軸81aを案内支持すべくカム体5の軸芯に設けたリング状ブッシュ82aとにより構成することもでき、挿通孔41内を、案内軸81aの案内ストローク域として利用することができ、従動軸6は、基端側において、係合片61の先端を保持体72の内壁面に当接させてブレを規制するようにした案内手段によらなくても軸受することができる。 Alternatively, the guide shaft 81a extended to be inserted into the insertion hole 41 formed in the shaft core of the rotor on the base end side of the driven shaft 6 on the base end side bearing portion 8a, and the guide shaft 81a It can also be constituted by a ring-shaped bush 82a provided at the shaft core of the cam body 5 to support the guide, and the inside of the insertion hole 41 can be used as a guide stroke area of the guide shaft 81a. On the base end side, the bearing can be supported without using the guide means that regulates the blur by bringing the front end of the engagement piece 61 into contact with the inner wall surface of the holding body 72.
この様に、挿通孔41を利用して、従動軸6を、軸受部222と8(8a)間に軸架してそれぞれ案内支持することにより、軸受部8(8a)をカム体5内に形成して、従動軸6を基端側で軸受することができ、従動軸6に対してサイドロードによる負荷が掛かっても、当該負荷が、軸架間に配設された係合片61とカム面53との係合(摺接)に伝搬してしまうことを回避して、スムーズなカム駆動を行うことができる。その結果、係合片61の長さを、カム面53への係合が従動軸6の軸芯から遠ざかるよう長く設定しても、軸芯ズレによる負荷がかかることもなく、カム体5の直径を大きくしてカム面となる円周面域を長ストロークに設定したカム駆動を実現することができるばかりか、係合片61をカム面53に対して片持ち係合して、カム面53の円周面域をスパイラル状に周回するカム駆動が行うことができ、さらには、従動軸6の軸架間の長さを容易に変更することができるので、カム体5(5a)の起伏を大きくしたカム形状に形成でき、カム体5の筒部52の長さ幅も任意に設定でき、その内周壁面を大きく利用した対面カム形状のカム面53を成形することができる。 In this manner, by using the insertion hole 41, the driven shaft 6 is pivotally supported between the bearing portions 222 and 8 (8a) and guided and supported, whereby the bearing portion 8 (8a) is placed in the cam body 5. Thus, the driven shaft 6 can be supported on the base end side, and even if a load due to a side load is applied to the driven shaft 6, the load is connected to the engagement piece 61 disposed between the shafts. It is possible to avoid the propagation to the engagement (sliding contact) with the cam surface 53 and to perform smooth cam driving. As a result, even if the length of the engagement piece 61 is set so long that the engagement with the cam surface 53 is away from the axis of the driven shaft 6, no load is applied due to the misalignment of the axis, and the cam body 5 The cam surface can be realized by increasing the diameter and setting the circumferential surface area to be a cam surface to be a long stroke, and by engaging the engagement piece 61 with the cam surface 53 in a cantilever manner. Since the cam drive which goes around the circumferential surface area of 53 in a spiral shape can be performed, and the length between the shafts of the driven shaft 6 can be easily changed, the cam body 5 (5a) The cam body 5 can be formed in a cam shape with increased undulations, the length width of the cylindrical portion 52 of the cam body 5 can be arbitrarily set, and the cam surface 53 of the facing cam shape that makes extensive use of the inner peripheral wall surface can be formed.
また、前記従動軸6は、その基端部側が円柱状の基盤62に嵌着され、該基盤62にカム面53に摺接係合する係合片61が設けられているので、カム体5の直径が大きくなりカム面53が軸芯からの距離を要する場合に、係合片61の長さを短く設定して、負荷を分散軽減することができ、回転子4の回転をスムーズに従動軸6の進退移動変位に変換することができる。
Further, the driven shaft 6 has a base end portion fitted to a columnar base 62 and an engagement piece 61 that is slidably engaged with the cam surface 53 is provided on the base 62. When the cam surface 53 requires a distance from the shaft center, the length of the engagement piece 61 can be set short to reduce the load dispersion and smoothly follow the rotation of the rotor 4. It can be converted into an advance / retreat displacement of the shaft 6.
1 カム駆動モータ
1a カム手段
1b モータ駆動手段
2 ケーシング
21 ケーシング本体
22 フロントキャップ
221 軸受部材
222 軸受部
3 ヨーク
31 ヨークブロック
32 コイルボビン
33 励磁コイル
4 回転子
41 挿通孔
42 ロータカラー
43 リング状磁石
5 カム体
51 底部
52 筒部
53 カム面
531 押動側カム面
532 引動側カム面
53a カム溝
6 従動軸
61 係合片
62 基盤
71 ブッシュ
72 保持体
8 軸受部
81 案内軸
82 案内孔
8a 軸受部
81a 案内軸
82a ブッシュ
DESCRIPTION OF SYMBOLS 1 Cam drive motor 1a Cam means 1b Motor drive means 2 Casing 21 Casing main body 22 Front cap 221 Bearing member 222 Bearing part 3 Yoke 31 York block 32 Coil bobbin 33 Excitation coil 4 Rotor 41 Insertion hole 42 Rotor collar 43 Ring-shaped magnet 5 Cam Body 51 Bottom 52 Tube 53 Cam surface 531 Push-side cam surface 532 Pull-side cam surface 53a Cam groove 6 Drive shaft 61 Engagement piece 62 Base 71 Bush 72 Holding body 8 Bearing portion 81 Guide shaft 82 Guide hole 8a Bearing portion 81a Guide shaft 82a Bush
Claims (5)
該カム手段は、前記カム体を、前記底部と円筒状の筒部とで断面視略コ字状に構成すると共に、前記底部を介してモータ駆動手段の回動に連結可能にケーシング内に収容させ、かつ、前記従動軸を、その基端側に前記係合片を一体的に取着して前記筒部の中心に配設せしめ、先端側をケーシング前面より出没可能に構成せしめる一方、
前記カム面を、前記筒部の内周壁面に対して所定のカム溝を形成することにより、押動側カム面と引動側カム面とからなる対面するカム形状で構成せしめ、
前記従動軸は、前記カム体の回動に伴って、前記係合片を、前記押動側カム面に形成された登り勾配により押動摺接させて前進方向へ従動せしめ、前記引動側カム面に形成された下り勾配により引動摺接させて後退方向へ従動せしめて、前記連動連結されるモータ駆動手段の出力軸としてカム駆動すべく構成されることを特徴とする出力軸を備えたカム装置。 A cam body provided with a predetermined cam surface which is provided to be rotatable in conjunction with the rotation of the motor driving means to be connected and extends in the axial direction from the outer periphery of the disc-shaped bottom, and the rotation of the cam body Cam means comprising a follower shaft capable of moving forward and backward while being driven by an engagement piece that is slidably engaged along the cam surface while being guided by a predetermined guide means,
The cam means is configured such that the cam body is formed in a substantially U shape in sectional view by the bottom portion and the cylindrical tube portion, and is accommodated in a casing so as to be connectable to rotation of the motor driving means via the bottom portion. And the driven shaft is integrally attached to the proximal end side of the driven shaft and disposed at the center of the cylindrical portion, and the distal end side is configured to be retractable from the front of the casing,
By forming a predetermined cam groove on the inner peripheral wall surface of the cylindrical portion, the cam surface is configured to have a facing cam shape composed of a pushing side cam surface and a pulling side cam surface,
The driven shaft causes the engaging piece to be driven in sliding movement by an upward slope formed on the driving side cam surface in accordance with the rotation of the cam body, and driven in the forward direction. A cam provided with an output shaft, wherein the cam is driven to come in sliding movement by a downward slope formed on the surface and driven in the backward direction so as to drive the cam as the output shaft of the interlocked motor drive means apparatus.
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2013068284A (en) * | 2011-09-22 | 2013-04-18 | Nippon Pulse Motor Co Ltd | Cam drive actuator |
JP2014084919A (en) * | 2012-10-22 | 2014-05-12 | Sharp Corp | Cam mechanism and heating cooker |
CN110202610A (en) * | 2019-04-26 | 2019-09-06 | 南京航空航天大学 | A kind of bionical cam-type active elastic spinal joint and its working method |
WO2021215074A1 (en) * | 2020-04-24 | 2021-10-28 | 日本パルスモーター株式会社 | Coil unit for multi-axis linear motor actuator, and manufacturing method therefor |
US12003159B2 (en) | 2020-04-24 | 2024-06-04 | Nippon Pulse Motor Co., Ltd. | Multi-axis linear motor actuator |
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JP2001349405A (en) * | 1999-07-29 | 2001-12-21 | Victor Co Of Japan Ltd | Moving direction guide device for swing arm |
JP2005208354A (en) * | 2004-01-23 | 2005-08-04 | Sankyo Seiki Mfg Co Ltd | Lens driving device |
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JPH05330624A (en) * | 1992-05-26 | 1993-12-14 | Sony Corp | Screw conveyor device |
JP2001349405A (en) * | 1999-07-29 | 2001-12-21 | Victor Co Of Japan Ltd | Moving direction guide device for swing arm |
JP2001221312A (en) * | 2000-02-09 | 2001-08-17 | Yoshihiro Kimura | Radial piston |
JP2005208354A (en) * | 2004-01-23 | 2005-08-04 | Sankyo Seiki Mfg Co Ltd | Lens driving device |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013068284A (en) * | 2011-09-22 | 2013-04-18 | Nippon Pulse Motor Co Ltd | Cam drive actuator |
JP2014084919A (en) * | 2012-10-22 | 2014-05-12 | Sharp Corp | Cam mechanism and heating cooker |
CN110202610A (en) * | 2019-04-26 | 2019-09-06 | 南京航空航天大学 | A kind of bionical cam-type active elastic spinal joint and its working method |
WO2021215074A1 (en) * | 2020-04-24 | 2021-10-28 | 日本パルスモーター株式会社 | Coil unit for multi-axis linear motor actuator, and manufacturing method therefor |
JP2021175265A (en) * | 2020-04-24 | 2021-11-01 | 日本パルスモーター株式会社 | Method for producing coil unit of multi-axial linear motor actuator |
JP7437686B2 (en) | 2020-04-24 | 2024-02-26 | 日本パルスモーター株式会社 | Coil unit in multi-axis linear motor actuator and its manufacturing method |
US12003159B2 (en) | 2020-04-24 | 2024-06-04 | Nippon Pulse Motor Co., Ltd. | Multi-axis linear motor actuator |
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