JP7499206B2 - Motor fixing structure - Google Patents

Motor fixing structure Download PDF

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JP7499206B2
JP7499206B2 JP2021050968A JP2021050968A JP7499206B2 JP 7499206 B2 JP7499206 B2 JP 7499206B2 JP 2021050968 A JP2021050968 A JP 2021050968A JP 2021050968 A JP2021050968 A JP 2021050968A JP 7499206 B2 JP7499206 B2 JP 7499206B2
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insertion hole
winding
cylindrical portion
motor
biasing member
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JP2022149040A (en
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雄弥 大金
勇二 秋葉
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Hitachi Astemo Ltd
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Description

本発明は、モータの固定構造に関する。 The present invention relates to a motor fixing structure.

従来、モータの固定構造として、例えば特許文献1に見られる構造が知られている。この構造では、モータのハウジングが、ボディの挿入孔(モータ収容部)内に配置されると共に、該ハウジングの一端側にカシメ部を介して固定されたフランジ(ブラケット)が、挿入孔の開口端の周囲でボディにボルトにより締結されている。この場合、モータのハウジングは、その外周とボディの挿入孔の内周との間にクリアランスを有するように該挿入孔内に配置されている。また、ボディの挿入孔の底面と、該底面側のハウジングの端面との間には、ウェーブワッシャが介装され、このウェーブワッシャによりハウジングが、ボディの挿入孔の開口端側に付勢されている。 Conventionally, a motor fixing structure is known, for example, as seen in Patent Document 1. In this structure, the motor housing is placed in the insertion hole (motor accommodating section) of the body, and a flange (bracket) fixed to one end of the housing via a crimping section is fastened to the body by bolts around the open end of the insertion hole. In this case, the motor housing is placed in the insertion hole of the body so that there is a clearance between its outer periphery and the inner periphery of the insertion hole of the body. In addition, a wave washer is interposed between the bottom surface of the insertion hole of the body and the end face of the housing on the bottom side, and this wave washer biases the housing toward the open end of the insertion hole of the body.

特開2008-17568号公報JP 2008-17568 A

特許文献1に見られるモータの固定構造では、ボディの挿入孔の内周とモータのハウジングの外周との間のクリアランスや、フランジのボディへの固定部とモータのハウジングへの固定部との間での撓み等よって、ボディに外部から加わる振動が、モータのハウジングに伝わり難いようになっている。 The motor fixing structure shown in Patent Document 1 is designed to prevent external vibrations applied to the body from being transmitted to the motor housing due to the clearance between the inner circumference of the body's insertion hole and the outer circumference of the motor housing, and the flexure between the fixing part of the flange to the body and the fixing part to the motor housing.

また、モータの作動時のモータ自体の振動やボディに外部から加わる振動などによってモータのハウジングの振動が発生し得るものの、モータのハウジングの端面とウェーブワッシャとの間に生じる摩擦力や、ウェーブワッシャとボディの底面との間に生じる摩擦力によってモータのハウジングの振動(ボディに対する変位)を減衰させることが可能である。 Although vibrations of the motor housing can occur due to the vibrations of the motor itself when the motor is in operation or due to external vibrations applied to the body, the vibrations of the motor housing (displacement relative to the body) can be damped by the frictional forces generated between the end faces of the motor housing and the wave washer, and between the wave washer and the bottom surface of the body.

しかるに、モータのハウジングの振動を減衰させる摩擦力は、ハウジングとウェーブワッシャとの当たり面、又は、ボディとウェーブワッシャとの当たり面だけで発生するので、それらの当たり面で、モータのハウジングやボディの摩耗が進行しやすいという不都合がある。 However, the frictional force that dampens the vibration of the motor housing occurs only at the contact surface between the housing and the wave washer, or the contact surface between the body and the wave washer, which means that wear on the motor housing and body is likely to progress at these contact surfaces.

本発明はかかる背景に鑑みてなされたものであり、簡素な構造で、摩耗に対する耐久性を向上させることができるモータの固定構造を提供することを目的とする。 The present invention was made in light of this background, and aims to provide a motor fixing structure that is simple in structure and can improve durability against wear.

本発明のモータの固定構造は、上記目的を達成するために、ボディの基準面に固定される被固定面を備えるフランジ部と、前記フランジ部に前記被固定面側から固定される円胴部とを備えており、前記円胴部外周面前記ボディに設けられた挿入孔の内周面との間に隙間をあけた状態で前記挿入孔の内部に配置され、前記円胴部の中心軸線方向の両端部のうち、前記フランジ部に固定される一方側の端部とは逆の他方側の端部は、前記挿入孔の底部に配置される付勢部材から前記一方側に向かって付勢されているモータの固定構造において、前記円胴部の、前記フランジ部に固定される一方側の端部とは逆の他方側の端部には、軸受け部が設けられており、前記挿入孔は、前記ボディの前記基準面側に設けられた大径挿入孔と、該大径挿入孔の内径よりも小さい内径で形成され前記挿入孔の底部側に設けられた小径挿入孔とを有しており、前記付勢部材は前記円胴部の中心軸線周りに同芯円状に巻きまわした巻回部を複数設けることで形成されており、前記巻回部の1つである第1巻回部は前記一方側に向かう方向での凹凸を該第1巻回部の周長方向で複数回繰り返して折り曲げられた弾性部材によって構成されており、前記巻回部の1つである第2巻回部は前記第1巻回部に前記中心軸線と平行な方向である軸方向に複数箇所で接触しており、前記付勢部材の前記軸方向の両端の巻回部である2つの端巻回部の中間部分の少なくとも一部の径方向内周が、前記軸受け部の外周に対向して配置され、前記中間部分の少なくとも一部の径方向外周が、前記小径挿入孔の内周に対向して配置されていることを特徴とするモータの固定構造(第1発明)。
なお、本発明において、付勢部材の巻回部について、「前記円胴部の中心軸線周りに同芯円状に巻きまわした」というのは、ほぼ同芯円状に巻きまわした状態を含み得る。また、「前記中心軸線と平行な方向」というのは、前記中心軸線とほぼ平行な方向を含み得る。
In order to achieve the above object, the motor fixing structure of the present invention includes a flange portion having a fixed surface fixed to a reference surface of a body, and a cylindrical portion fixed to the flange portion from the fixed surface side, the cylindrical portion being disposed inside the insertion hole provided in the body with a gap between its outer circumferential surface and an inner circumferential surface of the insertion hole, and one of both ends in the central axial direction of the cylindrical portion, the other end opposite to the one end fixed to the flange portion, is biased toward the one side by a biasing member disposed at the bottom of the insertion hole. In the motor fixing structure, a bearing portion is provided at the other end of the cylindrical portion opposite to the one end fixed to the flange portion, and the insertion hole is formed with a large diameter insertion hole provided on the reference surface side of the body and an inner diameter smaller than the inner diameter of the large diameter insertion hole. a small diameter insertion hole provided on a bottom side of the insertion hole, the biasing member being formed by providing a plurality of winding portions wound concentrically around the central axis of the cylindrical portion, a first winding portion which is one of the winding portions being made of an elastic member which is formed by bending the first winding portion in a circumferential direction thereof repeatedly a plurality of times in order to form concaves and convexes in a direction toward the one side, a second winding portion which is one of the winding portions being in contact with the first winding portion at a plurality of points in an axial direction which is a direction parallel to the central axis , at least a portion of a radial inner periphery of an intermediate portion of two end winding portions which are winding portions at both ends in the axial direction of the biasing member is disposed opposite an outer periphery of the bearing portion, and at least a portion of a radial outer periphery of the intermediate portion is disposed opposite an inner periphery of the small diameter insertion hole .
In the present invention, with respect to the wound portion of the urging member, "wound concentrically around the central axis of the cylindrical portion" may include a state in which the wound portion is wound substantially concentrically. Also, "a direction parallel to the central axis" may include a direction substantially parallel to the central axis.

かかる第1発明によれば、付勢部材とボディの挿入孔の底面との接触箇所、又は、付勢部材とモータの円胴部との接触箇所以外の接触箇所である巻回部同士の接触箇所(第1巻回部と第2巻回部との接触箇所)で摩擦力を発生することができる。このため、ボディの挿入孔内のモータの円胴部のボディに対する振動を減衰させ得る所要の減衰力を摩擦力により発生させるにあたり、付勢部材とボディとの接触箇所、又は付勢部材と円胴部との接触箇所にかかる負担を低減することが可能となる。ひいては付勢部材との間の摩擦力によるボディや円胴部の摩耗を低減することが可能となる。よって、第1発明によれば、簡素な構造で、摩耗に対する耐久性を向上させることができる。 According to the first invention, a frictional force can be generated at the contact point between the biasing member and the bottom surface of the insertion hole of the body, or at the contact point between the winding parts (contact point between the first winding part and the second winding part), which is a contact point other than the contact point between the biasing member and the cylinder part of the motor. Therefore, when generating the required damping force that can dampen the vibration of the cylinder part of the motor relative to the body inside the insertion hole of the body by frictional force, it is possible to reduce the load on the contact point between the biasing member and the body, or the contact point between the biasing member and the cylinder part. It is also possible to reduce wear on the body and the cylinder part due to the frictional force between the biasing member. Therefore, according to the first invention, it is possible to improve durability against wear with a simple structure.

上記第1発明では、前記付勢部材の前記軸方向の両端の巻回部である2つの端巻回部のうち少なくとも一方は前記モータが前記ボディに固定された状態で平面状の巻回部となるように形成され得る(第2発明)。なお、「平面状の巻回部」というのは、ほぼ平面状の巻回部を含み得る。
これによれば、ボディに対してモータの円胴部が中心軸線方向に振動することに起因して、付勢部材がその軸方向に変形するとき、付勢部材の端巻回部(平面状の巻回部)は径方向に収縮しないので、該端巻回部と挿入孔の底面との接触箇所、又は該端巻回部と円胴部との接触箇所に摩擦が発生しづらい。よって、当該接触箇所での摩耗が低減される。
In the first aspect of the present invention, at least one of the two end winding portions, which are winding portions at both ends in the axial direction of the biasing member, may be formed to be a planar winding portion in a state in which the motor is fixed to the body (a second aspect of the present invention). Note that the "planar winding portion" may include a substantially planar winding portion.
According to this, when the biasing member deforms in its axial direction due to the vibration of the motor's cylindrical portion relative to the body in the central axial direction, the end winding portion (flat winding portion) of the biasing member does not shrink in the radial direction, so friction is unlikely to occur at the contact point between the end winding portion and the bottom surface of the insertion hole or between the end winding portion and the cylindrical portion, thereby reducing wear at the contact points.

上記第1発明又は第2発明では、前記付勢部材の前記軸方向の両端の巻回部である2つの端巻回部のうち少なくとも前記一方側の端巻回部であるモータ側端巻回部は、前記円胴部に対して前記軸方向と直交する方向である交差方向において該円胴部に対する相対移動を制限するように該円胴部に嵌め合わされていることが好ましい(第3発明)。なお、「前記軸方向と直交する方向」というのは、前記軸方向にほぼ直交する方向を含み得る。
これによれば、モータに対して前記交差方向に振動が加わるとき、モータとモータ側端巻回部との接触箇所に摩擦が発生しずらいので、該接触箇所での摩耗が低減される。
In the first or second invention, it is preferable that at least one of the two end winding parts, which are winding parts at both ends in the axial direction of the biasing member, that is, the motor side end winding part is fitted into the cylindrical part so as to limit relative movement with respect to the cylindrical part in a cross direction that is a direction perpendicular to the axial direction (third invention). Note that "the direction perpendicular to the axial direction" may include a direction substantially perpendicular to the axial direction.
According to this, when vibration is applied to the motor in the intersecting direction, friction is unlikely to occur at the contact points between the motor and the motor side end winding portion, so wear at the contact points is reduced.

上記第1~第3発明では、前記付勢部材の前記軸方向の両端の巻回部である2つの端巻回部のうち少なくとも前記他方側の端巻回部であるボディ側端巻回部は、前記ボディに対して前記軸方向と直交する方向である交差方向において該ボディに対する相対移動を制限するよう該ボディに嵌め合わされていることが好ましい(第4発明)。
これによれば、モータに対して前記交差方向に振動が加わるとき、ボディとボディ側端巻回部との間の接触箇所に摩擦が発生しずらいので、該接触箇所での摩耗が低減される。
In the above first to third inventions, it is preferable that at least the body side end winding portion, which is the other end winding portion of the two end winding portions that are the winding portions at both ends of the axial direction of the urging member, is fitted into the body so as to limit relative movement with respect to the body in a cross direction that is perpendicular to the axial direction (fourth invention).
With this, when vibrations are applied to the motor in the intersecting direction, friction is less likely to occur at the contact points between the body and the body side end winding portion, reducing wear at the contact points.

図1Aは、第1実施形態でのモータの固定構造の全体構成を側面視で示す図、図1Bは第1実施形態に備えた付勢部材の斜視図。FIG. 1A is a side view showing an overall configuration of a fixing structure for a motor in a first embodiment, and FIG. 1B is a perspective view of a biasing member provided in the first embodiment. 図2Aは、第2実施形態でのモータの固定構造の要部構成を側面視で示す図、図2Bは第2実施形態に備えた付勢部材の斜視図。FIG. 2A is a side view showing a main configuration of a fixing structure of a motor in a second embodiment, and FIG. 2B is a perspective view of a biasing member provided in the second embodiment. 第3実施形態でのモータの固定構造の要部構成を側面視で示す図。FIG. 13 is a side view showing a main configuration of a fixing structure for a motor according to a third embodiment.

[第1実施形態]
本発明の第1実施形態を図1A及び図1Bを参照して説明する。図1Aに示すように、モータ(電動モータ)1は、図示しないステータ及びロータが収容されたハウジングとしての円胴部2と、回転駆動力の出力軸である回転軸3とを備える。
[First embodiment]
A first embodiment of the present invention will be described with reference to Figures 1A and 1B. As shown in Figure 1A, a motor (electric motor) 1 includes a cylindrical portion 2 as a housing that accommodates a stator and a rotor (not shown), and a rotating shaft 3 that is an output shaft for a rotational driving force.

回転軸3は、円胴部2内の図示しないロータと一体に回転するように該ロータに結合されており、円胴部2の中心軸線C上で該円胴部2の両端部に設けられた軸受け部4a,4bで円胴部2に対して相対回転自在に支持されている。そして、回転軸3は、円胴部2の中心軸線C方向の一方側(図1Aでは上方側)に軸受け部4aを通って延設され、その延設部分の先端部に動力伝達要素としての駆動ギヤ5が装着されている。 The rotating shaft 3 is connected to a rotor (not shown) inside the cylindrical portion 2 so as to rotate integrally with the rotor, and is supported by bearings 4a and 4b provided at both ends of the cylindrical portion 2 on the central axis C of the cylindrical portion 2 so as to be rotatable relative to the cylindrical portion 2. The rotating shaft 3 extends through the bearing 4a to one side in the direction of the central axis C of the cylindrical portion 2 (the upper side in FIG. 1A), and a drive gear 5 is attached to the tip of the extension as a power transmission element.

なお、回転軸3からの動力伝達系は任意の構成のものを採用することができ、その動力伝達系の構成によって、駆動ギヤ5以外の動力伝達要素(例えばプーリ、スプロケット等)が回転軸3に装着され得る。 The power transmission system from the rotating shaft 3 can be of any configuration, and depending on the configuration of the power transmission system, power transmission elements other than the drive gear 5 (e.g., pulleys, sprockets, etc.) can be attached to the rotating shaft 3.

円胴部2は、その中心軸線Cの方向で見た外形状が円形状に形成されたハウジングであおる。本実施形態では、円胴部2は、小径部2aと、該小径部2aよりも若干、外径が大きい大径部2bとを主要部として構成されている。この場合、円胴部2は、その中心軸線C方向の一方側の部分(軸受け部4a側の部分)に小径部2aを有し、、他方側の部分(軸受け部4b側の部分)に大径部2bを有する。ただし、円胴部2は、例えば、中心軸線C方向に一定の外径を有するものであってもよい。あるいは、円胴部2は、その外径が中心軸線C方向で様々な態様で変化するように構成され得る。 The cylindrical portion 2 is supported by a housing having a circular outer shape as viewed in the direction of the central axis C. In this embodiment, the cylindrical portion 2 is mainly composed of a small diameter portion 2a and a large diameter portion 2b having an outer diameter slightly larger than that of the small diameter portion 2a. In this case, the cylindrical portion 2 has the small diameter portion 2a on one side (the portion on the bearing portion 4a side) in the direction of the central axis C, and has the large diameter portion 2b on the other side (the portion on the bearing portion 4b side). However, the cylindrical portion 2 may have a constant outer diameter in the direction of the central axis C, for example. Alternatively, the cylindrical portion 2 may be configured so that its outer diameter changes in various ways in the direction of the central axis C.

円胴部2は、それを取り付ける基体であるボディ10に、板状のフランジ部20を介して固定されている。具体的には、ボディ10には、モータ1の円胴部2を収容可能な有底の挿入孔11が形成されており、この挿入孔11は、円胴部2の大径部2bの外径よりも若干大きい一定の内径を有するように形成されている。そして、ボディ10の挿入孔11の開口端の周囲の表面がフランジ部20を固定する基準面12となっており、この基準面12には、挿入孔11の開口端の周方向に間隔を存して複数のネジ穴13が穿設されている。 The cylindrical portion 2 is fixed to the body 10, which is the base on which it is attached, via a plate-shaped flange portion 20. Specifically, the body 10 is formed with a bottomed insertion hole 11 capable of accommodating the cylindrical portion 2 of the motor 1, and this insertion hole 11 is formed to have a constant inner diameter that is slightly larger than the outer diameter of the large diameter portion 2b of the cylindrical portion 2. The surface surrounding the open end of the insertion hole 11 in the body 10 serves as a reference surface 12 for fixing the flange portion 20, and a number of screw holes 13 are drilled into this reference surface 12 at intervals in the circumferential direction of the open end of the insertion hole 11.

フランジ部20は、円胴部2の中心軸線C方向の両端部のうち、軸受け部4a側の一端部に該中心軸線Cと直交する姿勢で固定されている。この場合、フランジ部20の周縁部は円胴部2の外周面よりも径方向外方に張り出されている。 The flange portion 20 is fixed to one end of the bearing portion 4a side of the two ends of the cylindrical portion 2 in the direction of the central axis C in a position perpendicular to the central axis C. In this case, the peripheral edge of the flange portion 20 protrudes radially outward beyond the outer circumferential surface of the cylindrical portion 2.

そして、モータ1をボディ10に取り付ける際には、モータ1の円胴部2がボディ10の挿入孔11にほぼ同芯に(円胴部2の中心軸線Cを挿入孔11の中心軸線に一致もしくはほぼ一致させて)挿入されると共に、フランジ部20の周縁部の厚み方向の両面のうち、円胴部2が配置されている側の面(円胴部2の外周面に臨む側の面)である被固定面20aが、ボディ10の挿入孔11の開口端周囲の基準面12に当接される。 When the motor 1 is attached to the body 10, the cylindrical portion 2 of the motor 1 is inserted into the insertion hole 11 of the body 10 almost concentrically (the central axis C of the cylindrical portion 2 is aligned or nearly aligned with the central axis of the insertion hole 11), and the fixed surface 20a, which is the surface on which the cylindrical portion 2 is located (the surface facing the outer circumferential surface of the cylindrical portion 2) of both sides in the thickness direction of the peripheral portion of the flange portion 20, is abutted against the reference surface 12 around the opening end of the insertion hole 11 of the body 10.

さらに、フランジ部20の周縁部の厚み方向の両面のうち、被固定面20aと反対側の面側から、複数のボルト25(ネジ穴13と同数のボルト25)のそれぞれが、フランジ部20に穿設されているボルト挿通孔(図示省略)を通ってボディ10の各ネジ穴13にねじ締めされる。これにより、フランジ部20がボディ10に固定(締結)される。ひいては、モータ1の円胴部2が、挿入孔11内に収容された状態で、フランジ部20を介してボディ10に固定される。 Furthermore, of the two surfaces in the thickness direction of the periphery of the flange portion 20, a number of bolts 25 (the same number of bolts 25 as the number of screw holes 13) are screwed into each screw hole 13 of the body 10 through bolt insertion holes (not shown) drilled in the flange portion 20 from the surface opposite the fixed surface 20a. This fixes (fastens) the flange portion 20 to the body 10. As a result, the cylinder portion 2 of the motor 1 is fixed to the body 10 via the flange portion 20 while being housed in the insertion hole 11.

この場合、モータ1の円胴部2の外周面は、挿入孔11の内周面に接触せず、該円胴部2の外周面と挿入孔11の内周面との間に隙間(クリアランス)が形成される。なお、モータ1の円胴部2は、フランジ部20の周辺部の厚み方向の両面のうち、被固定面20a側に配置されているので、該円胴部2は、換言すれば、フランジ部20の被固定面20a側からフランジ部20に固定されている。 In this case, the outer peripheral surface of the cylindrical portion 2 of the motor 1 does not contact the inner peripheral surface of the insertion hole 11, and a gap (clearance) is formed between the outer peripheral surface of the cylindrical portion 2 and the inner peripheral surface of the insertion hole 11. The cylindrical portion 2 of the motor 1 is disposed on the fixed surface 20a side of both sides in the thickness direction of the peripheral portion of the flange portion 20, so that the cylindrical portion 2 is fixed to the flange portion 20 from the fixed surface 20a side of the flange portion 20.

ボディ10の挿入孔11の深さ(開口端から底面までの深さ)は、フランジ部20の被固定面20aからモータ1の軸受け部4bの先端までの長さよりも大きい深さに設定されている。このため、上記のようにモータ1の円胴部2をフランジ部20を介してボディ10に固定した状態で、円胴部2の軸受け部4b側の端部及び該軸受け部4bは、ボディ10の挿入孔11の底面との間に間隔を存して該挿入孔11内に配置される。そして、円胴部2をボディ10に固定する際には、円胴部2の軸受け部4b側の端部と、挿入孔11の底面との間には、円胴部2をその中心軸線Cの一方側(軸受け部4a側)に向かってボディ10に対して付勢する付勢部材30が介装される。 The depth of the insertion hole 11 of the body 10 (depth from the opening end to the bottom surface) is set to a depth greater than the length from the fixed surface 20a of the flange portion 20 to the tip of the bearing portion 4b of the motor 1. Therefore, when the cylindrical portion 2 of the motor 1 is fixed to the body 10 via the flange portion 20 as described above, the end of the cylindrical portion 2 on the bearing portion 4b side and the bearing portion 4b are disposed in the insertion hole 11 of the body 10 with a gap between them. When the cylindrical portion 2 is fixed to the body 10, a biasing member 30 is interposed between the end of the cylindrical portion 2 on the bearing portion 4b side and the bottom surface of the insertion hole 11 to bias the cylindrical portion 2 against the body 10 toward one side of the central axis C (the bearing portion 4a side).

ここで、図1Aでは、付勢部材30を縦断面(円胴部2の中心軸線Cを含む平面での断面)で見た構成を概略的に示しているが、該付勢部材30の具体的な構成が、図1Bに斜視図で示されている。図1Bに示すように、付勢部材30は、円胴部2の中心軸線C周りに同芯円状に巻き回された巻回部31(1巻きの巻回部31)を複数備え、これらの複数の巻回部31が中心軸線Cの方向に並んで概略螺旋状に連なるように構成されたものであり、細長の弾性部材により形成されている。 Here, FIG. 1A shows a schematic configuration of the biasing member 30 as viewed in vertical section (a section in a plane including the central axis C of the cylindrical body 2), while FIG. 1B shows a perspective view of the specific configuration of the biasing member 30. As shown in FIG. 1B, the biasing member 30 has a plurality of winding portions 31 (one winding portion 31) wound concentrically around the central axis C of the cylindrical body 2, and these multiple winding portions 31 are arranged in the direction of the central axis C and are connected in a generally spiral shape, and are formed from an elongated elastic member.

この場合、各巻回部31は、円胴部2の中心軸線Cに平行な方向(円胴部2の軸受け部4b側から軸受け部4a側に向かう方向)での凹凸を該巻回部31の周長方向に複数回繰り返すように折り曲げられた形状に形成されている。なお、中心軸線Cに平行な方向での凹凸というのは、詳しくは、中心軸線Cの一方側に向かって突き出る凸部(例えば、図1Bで参照符号31aを付した部分)と、該凸部に連なって、中心軸線Cの他方側に向かってへこむ凹部(例えば、図1Bで参照符号31bを付した部分)との組を意味する。 In this case, each winding section 31 is formed in a shape that is folded so that the unevenness in the direction parallel to the central axis C of the cylindrical section 2 (the direction from the bearing section 4b side to the bearing section 4a side of the cylindrical section 2) is repeated multiple times in the circumferential direction of the winding section 31. In particular, the unevenness in the direction parallel to the central axis C refers to a set of a convex portion protruding toward one side of the central axis C (for example, the portion marked with reference number 31a in FIG. 1B) and a concave portion connected to the convex portion and recessed toward the other side of the central axis C (for example, the portion marked with reference number 31b in FIG. 1B).

かかる各巻回部31は、換言すれば、円胴部2の中心軸線Cに平行な方向に振幅するように波状に折り曲げられた細長の部材を、該中心軸線Cの周りに同芯円状に巻回した形状に形成されている。 In other words, each of these winding sections 31 is formed by winding a thin, elongated member that is bent in a wavy shape so as to oscillate in a direction parallel to the central axis C of the cylindrical body 2 in a concentric manner around the central axis C.

そして、付勢部材30を構成する任意の1つの巻回部31を巻回部31(i) (i=1,2、……)、該巻回部31(i)の凹部の底部側で該巻回部31(i)に隣り合う巻回部31を巻回部31(i+1)と表記したとき、巻回部31(i)の1つ以上の凹部の底部と、巻回部31(i+1)の凸部のうち、巻回部31)(i)の当該凹部に向かって突き出る凸部の頂部とが接触されている。 When any one of the winding parts 31 constituting the biasing member 30 is denoted as winding part 31(i) (i=1, 2, ...), and the winding part 31 adjacent to the winding part 31(i) on the bottom side of the recess of the winding part 31(i) is denoted as winding part 31(i+1), the bottom of one or more recesses of the winding part 31(i) are in contact with the top of the protrusion of the winding part 31(i+1) that protrudes toward the recess of the winding part 31)(i).

例えば、図1Bにおいて、図1Bの上方側から2番目の巻回部31(2)と、これに隣り合う3番目の巻回部31(3)との組を代表的に着目すると、巻回部31(2)の各凹部31bの底部と、巻回部31(3)の各凸部31aの頂部とが接触されている。このことは、巻回部31(2),31(3)の組以外の巻回部31(i),31(i+1)の組についても同様である。 For example, in FIG. 1B, if we look at the pair of the second winding portion 31(2) from the top of FIG. 1B and the third winding portion 31(3) adjacent to it, the bottom of each recess 31b of the winding portion 31(2) is in contact with the top of each protrusion 31a of the winding portion 31(3). This is also true for the pair of winding portions 31(i) and 31(i+1) other than the pair of winding portions 31(2) and 31(3).

上記の如く構成された付勢部材30は、その軸方向(付勢部材30の中心軸線の方向)を円胴部2の中心軸線Cと同方向に向けた状態で、円胴部2の軸受け部4b側の端部と、挿入孔11の底面との間に中心軸線Cと同芯に(付勢部材30の中心軸線を円胴部2の中心軸線Cに一致もしくほぼ一致させて)介装されると共に、該付勢部材30の両端部(中心軸線C方向の両端部)のうち、円胴部2側の端部が軸受け部4bの周囲で円胴部2の端面に圧接され、挿入孔11の底面側の端部が該挿入孔11の底面に圧接される。 The biasing member 30 configured as described above is interposed between the end of the bearing portion 4b of the cylindrical portion 2 and the bottom surface of the insertion hole 11 concentrically with the central axis C (with the central axis of the biasing member 30 coinciding or nearly coinciding with the central axis C of the cylindrical portion 2) with its axial direction (the direction of the central axis of the biasing member 30) facing in the same direction as the central axis C of the cylindrical portion 2, and of both ends of the biasing member 30 (both ends in the direction of the central axis C), the end on the cylindrical portion 2 side is pressed against the end surface of the cylindrical portion 2 around the bearing portion 4b, and the end on the bottom side of the insertion hole 11 is pressed against the bottom surface of the insertion hole 11.

本実施形態のモータ1の固定構造では、上記の如く構成された付勢部材30がモータ1の円胴部2の端部(軸受け部4b側の端部)と、ボディ10の挿入孔11の底面との間に介装されているので、円胴部2がボディ10に対して径方向に振動するとき、付勢部材30と円胴部2の端面との接触箇所や、付勢部材30と挿入孔11の底面との接触箇所だけでなく、付勢部材30の隣り合う巻回部31(i),31(i+1)同士の接触箇所でも、ボディ10に対する円胴部2の径方向への振動を減衰させる摩擦力を発生させることができる。 In the fixing structure of the motor 1 of this embodiment, the biasing member 30 configured as described above is interposed between the end of the cylindrical portion 2 of the motor 1 (the end on the bearing portion 4b side) and the bottom surface of the insertion hole 11 of the body 10. Therefore, when the cylindrical portion 2 vibrates radially relative to the body 10, frictional forces that dampen the radial vibration of the cylindrical portion 2 relative to the body 10 can be generated not only at the contact points between the biasing member 30 and the end face of the cylindrical portion 2 and the contact points between the biasing member 30 and the bottom surface of the insertion hole 11, but also at the contact points between the adjacent winding portions 31(i), 31(i+1) of the biasing member 30.

このため、ボディ10に対する円胴部2の径方向への振動時に、付勢部材30と円胴部2の端面との接触箇所や、付勢部材30と挿入孔11の底面との接触箇所に発生する摩擦力を低減することができ、ひいては、その接触箇所での円胴部2の端面や、ボディ10の挿入孔11の底面の摩耗を低減することができる。 As a result, when the cylindrical portion 2 vibrates radially relative to the body 10, the frictional force that occurs at the contact points between the biasing member 30 and the end face of the cylindrical portion 2 and the contact points between the biasing member 30 and the bottom surface of the insertion hole 11 can be reduced, and thus wear on the end face of the cylindrical portion 2 and the bottom surface of the insertion hole 11 of the body 10 at those contact points can be reduced.

また、付勢部材30と円胴部2の端面との接触箇所、付勢部材30と挿入孔11の底面との接触箇所、付勢部材30の隣り合う巻回部31(i),31(i+1)同士の接触箇所でそれぞれ発生する摩擦力が小さくても、それらの摩擦力を合成したトータルの摩擦力を大きくできるので、ボディ10に対する円胴部2の径方向への振動の減衰性を高めることができる。 In addition, even if the frictional forces generated at the contact points between the biasing member 30 and the end face of the cylindrical portion 2, the contact points between the biasing member 30 and the bottom surface of the insertion hole 11, and the contact points between adjacent winding portions 31(i) and 31(i+1) of the biasing member 30 are small, the total frictional force obtained by combining these frictional forces can be made large, thereby improving the damping of radial vibration of the cylindrical portion 2 relative to the body 10.

[第2実施形態]
次に、本発明の第2実施形態を図2A及び図2Bを参照して説明する。なお、本実形態は、前記第1実施形態と一部の構成だけが相違する実施形態であるので、第1実施形態と同一の事項については説明を省略する。
[Second embodiment]
Next, a second embodiment of the present invention will be described with reference to Figures 2A and 2B. Note that this embodiment is an embodiment that differs from the first embodiment only in some configurations, and therefore the same matters as the first embodiment will not be described.

本実施形態では、モータ1及びフランジ部20の構成と、ボディ10に対するフランジ部20の固定のための構造とは、第1実施形態と同じである。一方、本実施形態では、付勢部材40の一部の構成と、該付勢部材40とモータ1の円胴部2及びボディ10との係合に係る構造とが、以下に説明する如く第1実施形態と相違する。 In this embodiment, the configuration of the motor 1 and the flange portion 20, and the structure for fixing the flange portion 20 to the body 10 are the same as those in the first embodiment. However, in this embodiment, the configuration of a portion of the biasing member 40 and the structure relating to the engagement of the biasing member 40 with the cylindrical portion 2 of the motor 1 and the body 10 differ from those in the first embodiment, as described below.

具体的には、本施形態では、モータ1の円胴部2の端部(軸受け部4b側の端部)と、ボディ10の挿入孔11の底面との間に介装される付勢部材40は、図2Bに示す如く構成されている。以降、付勢部材40を構成する複数の巻回部41(概略螺旋状に連なる複数の巻回部41)の個数をN個とし、各巻回部41の参照符号を円胴部2側から順番に(図2Bでは上方側から順番に)、41(1),41(2),……,41(N)と表記する。 Specifically, in this embodiment, the biasing member 40 interposed between the end of the cylindrical portion 2 of the motor 1 (the end on the bearing portion 4b side) and the bottom surface of the insertion hole 11 of the body 10 is configured as shown in FIG. 2B. Hereinafter, the number of multiple winding portions 41 (multiple winding portions 41 connected in a roughly spiral shape) that make up the biasing member 40 will be N, and the reference characters of the winding portions 41 will be written as 41(1), 41(2), ..., 41(N) in order from the cylindrical portion 2 side (in FIG. 2B, in order from the top side).

この付勢部材40を構成するN個の巻回部41のうち、該付勢部材40の軸方向(付勢部材40の中心軸線の方向)の両端の巻回部41(1)、41(N)(以降、端巻回部41(1),41(N)という)のそれぞれは、該軸方向での凹凸を有さず、該軸方向にほぼ直交する面一の平面状に形成されている。そして、付勢部材40の他の巻回部41(2)~41(N-1)のそれぞれは、第1実施形態の付勢部材30の各巻回部31と同様に、凹凸が周長方向に繰り返されるように形成されており、巻回部41(2)~41(N-1)のうち、隣り合う巻回部41(i),41(i+1)(i=2,3,…,N-2)の各組において、第1実施形態の付勢部材30と同様に、巻回部41(i)の凹部と巻回部41(i+1)の凸部とが接触されている。 Of the N winding portions 41 constituting this biasing member 40, the winding portions 41(1), 41(N) at both ends of the axial direction of the biasing member 40 (the direction of the central axis of the biasing member 40) (hereinafter referred to as end winding portions 41(1), 41(N)) are formed in a flush plane that does not have any irregularities in the axial direction and is approximately perpendicular to the axial direction. Each of the other windings 41(2) to 41(N-1) of the biasing member 40 is formed so that the concaves and convexes are repeated in the circumferential direction, similar to each winding 31 of the biasing member 30 of the first embodiment, and among the windings 41(2) to 41(N-1), in each pair of adjacent windings 41(i), 41(i+1) (i=2, 3, ..., N-2), the concaves of windings 41(i) and the convexities of windings 41(i+1) are in contact with each other, similar to the biasing member 30 of the first embodiment.

なお、付勢部材50の端巻回部41(1)、41(N)のうち、端巻回部41(1)には、これと隣り合う巻回部41(2)の端巻回部41(1)側に突き出る1つ以上の凸部が接触され得る。また、端巻回部41(N)には、これと隣り合う巻回部41(N-1)の端巻回部41(N)側に凹む1つ以上の凹部が接触され得る。 Of the end winding portions 41(1) and 41(N) of the biasing member 50, the end winding portion 41(1) may be in contact with one or more convex portions protruding toward the end winding portion 41(1) of the adjacent winding portion 41(2). Also, the end winding portion 41(N) may be in contact with one or more concave portions recessed toward the end winding portion 41(N) of the adjacent winding portion 41(N-1).

また、本実施形態では、ボディ10の挿入孔11は、その開口端から内奥側に向かって円胴部2の大径部2bの外径よりも大きい一定の内径で形成された大径挿入孔11aと、該大径挿入孔11aの内奥端部(開口端と反対側の端部)から内側に張り出すように形成された環状段差面11bと、大径挿入孔11aの内径よりも小さく、且つ軸受け部4bの外径よりも大きい一定の内径を有し、環状段差面11bの内周縁から大径挿入孔11aに同芯に連通するように形成された有底の小径挿入孔11cとから構成されている。 In this embodiment, the insertion hole 11 of the body 10 is composed of a large diameter insertion hole 11a formed with a constant inner diameter larger than the outer diameter of the large diameter portion 2b of the cylindrical portion 2 from its opening end toward the innermost side, an annular step surface 11b formed to protrude inward from the innermost end (the end opposite the opening end) of the large diameter insertion hole 11a, and a bottomed small diameter insertion hole 11c formed to concentrically connect from the inner peripheral edge of the annular step surface 11b to the large diameter insertion hole 11a, with a constant inner diameter smaller than the inner diameter of the large diameter insertion hole 11a and larger than the outer diameter of the bearing portion 4b.

この場合、モータ1をフランジ部20を介してボディ10に固定した状態で、挿入孔11の大径挿入孔11aの内周面が円胴部2の外周面との間に隙間を有して該円胴部2の周囲を囲むと共に、環状段差面11bが、円胴部2の軸受け部4b側の端面と間隔を存して該端面に対面し、また、軸受け部4bが、小径挿入孔11cの内周面及び底面と間隔を存して該大径挿入孔11a内に進入するように、大径挿入孔11aの内径及び深さ、環状段差面11bの内径、及び小径挿入孔11cの内径及び深さが設定されている。 In this case, when the motor 1 is fixed to the body 10 via the flange portion 20, the inner circumferential surface of the large diameter insertion hole 11a of the insertion hole 11 surrounds the circumference of the cylindrical portion 2 with a gap between it and the outer circumferential surface of the cylindrical portion 2, the annular step surface 11b faces the end face of the cylindrical portion 2 on the bearing portion 4b side with a gap therebetween, and the inner diameter and depth of the large diameter insertion hole 11a, the inner diameter of the annular step surface 11b, and the inner diameter and depth of the small diameter insertion hole 11c are set so that the bearing portion 4b enters the large diameter insertion hole 11a with a gap between them and the inner circumferential surface and bottom surface of the small diameter insertion hole 11c.

そして、付勢部材40は、軸受け部4bの周囲に円胴部2と同芯に(付勢部材40の中心軸線を円胴部2の中心軸線Cに一致もしくはほぼ一致させて)配設され、その両端の端巻回部41(1)、41(N)のうちの端巻回部41(1)が円胴部2の軸受け部4b側の端面に圧接されると共に、端巻回部41(N)が小径挿入孔11cの底面に圧接される。 The biasing member 40 is disposed concentrically around the bearing portion 4b with the cylindrical portion 2 (the central axis of the biasing member 40 coincides or nearly coincides with the central axis C of the cylindrical portion 2), and of the end windings 41(1) and 41(N) at both ends, the end windings 41(1) are pressed against the end surface of the cylindrical portion 2 on the bearing portion 4b side, and the end windings 41(N) are pressed against the bottom surface of the small diameter insertion hole 11c.

さらに、本実施形態では、付勢部材40の両端の端巻回部41(1),41(N)のうち、円胴部2の端面に圧接される端巻回部41(1)の内径は、軸受け部4bの円胴部2側の端部の外径とほぼ同一の径に形成されている。また、小径挿入孔11cの底面に圧接される端巻回部41(N)の外径は、小径挿入孔11cの内周面の底面側の端部の内径とほぼ同一の径に形成されている。このため、端巻回部41(1)が,軸受け部4bの円胴部2側の端部の周囲での円胴部2の端面(軸受け部4b側の端面)に嵌合し、巻回部41(N)が、小径挿入孔11cの内周面の底面側の端部に嵌合する。これにより、付勢部材40の端巻回部41(1)が円胴部2及び軸受け部4bに対して円胴部2の中心軸線Cに直交する方向(交差方向)に変位するのが抑制(制限)されると共に、端巻回部41(N)がボディ10に対して円胴部2の中心軸線Cに直交する方向(交差方向)に変位するのが抑制(制限)されるようになっている。 Furthermore, in this embodiment, of the end winding portions 41(1) and 41(N) at both ends of the urging member 40, the inner diameter of the end winding portion 41(1) that is pressed against the end face of the cylindrical portion 2 is formed to be approximately the same diameter as the outer diameter of the end of the cylindrical portion 2 side of the bearing portion 4b. Also, the outer diameter of the end winding portion 41(N) that is pressed against the bottom face of the small diameter insertion hole 11c is formed to be approximately the same diameter as the inner diameter of the end of the bottom face side of the inner circumferential surface of the small diameter insertion hole 11c. Therefore, the end winding portion 41(1) fits into the end face of the cylindrical portion 2 (end face on the bearing portion 4b side) around the end of the cylindrical portion 2 side of the bearing portion 4b, and the winding portion 41(N) fits into the end of the bottom face side of the inner circumferential surface of the small diameter insertion hole 11c. This prevents (limits) the displacement of the end winding portion 41(1) of the biasing member 40 relative to the cylindrical portion 2 and the bearing portion 4b in a direction perpendicular to the central axis C of the cylindrical portion 2 (intersecting direction), and also prevents (limits) the displacement of the end winding portion 41(N) relative to the body 10 in a direction perpendicular to the central axis C of the cylindrical portion 2 (intersecting direction).

本実施形態は、以上説明した事項以外は、第1実施形態と同じである。かかる本実施形態では、付勢部材40の円胴部2側の端巻回部41(1)が、これと接触する円胴部2の端面に対して中心軸線Cと直交する交差方向に変位しないか、もしくは変位しにくくなっている。同様に、付勢部材40の小径挿入孔11cの底面側の端巻回部41(N)が、これと接触する小径挿入孔11cの底面に対して中心軸線Cと直交する交差方向に変位しないか、もしくは変位しにくくなっている。 This embodiment is the same as the first embodiment except for the points described above. In this embodiment, the end winding portion 41(1) on the cylindrical portion 2 side of the urging member 40 does not displace in a direction perpendicular to the central axis C relative to the end face of the cylindrical portion 2 that contacts it, or is difficult to displace. Similarly, the end winding portion 41(N) on the bottom side of the small diameter insertion hole 11c of the urging member 40 does not displace in a direction perpendicular to the central axis C relative to the bottom face of the small diameter insertion hole 11c that contacts it, or is difficult to displace.

このため、円胴部2がボディ10に対して中心軸線Cと直交する交差方向に振動しても、端巻回部41(1)と円胴部2の端面との接触箇所や、端巻回部41(N)と小径挿入孔11cの底面との接触箇所にほとんど摩擦力が発生しない。 As a result, even if the cylindrical portion 2 vibrates relative to the body 10 in a direction perpendicular to the central axis C, almost no frictional force is generated at the contact points between the end winding portion 41(1) and the end face of the cylindrical portion 2, or at the contact points between the end winding portion 41(N) and the bottom surface of the small diameter insertion hole 11c.

加えて、端巻回部41(1),41(N)は、凹凸を有さずに平面状に形成されているので、モータ1の円胴部2がボディ10に対して中心軸線C方向に振動しても、端巻回部41(1),41(N)はいずれも径方向に収縮せず、ひいては、その収縮に起因する摩擦力が、端巻回部41(1)と円胴部2の端面との接触箇所や、端巻回部41(N)と挿入孔11の底面との接触箇所に生じるのが防止される。 In addition, the end windings 41(1), 41(N) are formed flat without any irregularities, so that even if the body 2 of the motor 1 vibrates in the direction of the central axis C relative to the body 10, neither of the end windings 41(1), 41(N) will contract radially. As a result, frictional forces caused by this contraction are prevented from occurring at the contact points between the end windings 41(1) and the end faces of the body 2, or at the contact points between the end windings 41(N) and the bottom surface of the insertion hole 11.

さらに、端巻回部41(1)と円胴部2の端面との接触箇所や、端巻回部41(N)と小径挿入孔11cの底面との接触箇所が面接触状態になりやすい。このため、端巻回部41(1)と円胴部2の端面との接触箇所で摩擦力が発生しても、その摩擦力は、端巻回部41(1)と円胴部2の端面との接触面内に分散しやすくなって、円胴部2の端面に、端巻回部41(1)との間で局所的な摩擦力が作用するのが抑制される。同様に、ボディ10の小径挿入孔11cの底面に、端巻回部41(N)との間で局所的な摩擦力が作用するのが抑制される。 Furthermore, the contact points between the end winding portion 41(1) and the end face of the cylindrical portion 2 and the contact points between the end winding portion 41(N) and the bottom face of the small diameter insertion hole 11c tend to be in surface contact. Therefore, even if frictional force occurs at the contact point between the end winding portion 41(1) and the end face of the cylindrical portion 2, the frictional force tends to be dispersed within the contact surface between the end winding portion 41(1) and the end face of the cylindrical portion 2, and localized frictional force acting between the end winding portion 41(1) and the end face of the cylindrical portion 2 is suppressed. Similarly, localized frictional force acting between the end winding portion 41(N) and the bottom face of the small diameter insertion hole 11c of the body 10 is suppressed.

これらのことから、付勢部材40の端巻回部41(1)と円胴部2の端面との接触箇所での円胴部2の端面の摩耗や、付勢部材40の端巻回部41(N)と小径挿入孔11cの底面との接触箇所での該小径挿入孔11cの底面の摩耗を効果的に低減することができる。 As a result, it is possible to effectively reduce wear on the end face of the cylindrical portion 2 at the contact point between the end winding portion 41(1) of the urging member 40 and the end face of the cylindrical portion 2, and wear on the bottom face of the small diameter insertion hole 11c at the contact point between the end winding portion 41(N) of the urging member 40 and the bottom face of the small diameter insertion hole 11c.

[第3実施形態]
次に、本発明の第3実施形態を図3を参照して説明する。なお、本実施形態は、前記第2実施形態と一部の構成だけが相違する実施形態であるので、第2実施形態と同一の事項については説明を省略する。
[Third embodiment]
Next, a third embodiment of the present invention will be described with reference to Fig. 3. This embodiment differs from the second embodiment only in part of the configuration, and therefore the same points as the second embodiment will not be described.

本実施形態は、モータ1、フランジ部20及び付勢部材40の構造と、ボディ10に対するフランジ部20の固定のための構造とは第2実施形態と同じである。そして、本実施形態では、付勢部材40と円胴部2及びボディ10との係合に係る構造が以下に説明する如く第2実施形態と相違する。 In this embodiment, the structure of the motor 1, flange portion 20, and biasing member 40, and the structure for fixing the flange portion 20 to the body 10 are the same as those in the second embodiment. However, in this embodiment, the structure relating to the engagement between the biasing member 40 and the cylindrical portion 2 and the body 10 differs from that in the second embodiment, as described below.

具体的には、本実施形態では、ボディ10の挿入孔11は、その開口端から内奥側に向かって円胴部2の大径部2bの外径よりも大きい一定の内径で形成された開口側挿入孔11dと、該開口側挿入孔11dの内奥端部(開口端と反対側の端部)から内側に向かって縮径するように円胴部2の中心軸線Cに対して傾斜して形成された縮径内周面11eと、縮径内周面11eの内奥端部から内側に向かって中心軸線Cと直交する方向に張り出すように形成された環状底面11fと、環状底面11fの内周縁から該環状底面11fよりも凹むように形成された凹部底面11gとから構成されている。 Specifically, in this embodiment, the insertion hole 11 of the body 10 is composed of an opening side insertion hole 11d formed with a constant inner diameter larger than the outer diameter of the large diameter section 2b of the cylindrical section 2 from its opening end toward the innermost side, a reduced diameter inner circumferential surface 11e formed at an angle with respect to the central axis C of the cylindrical section 2 so as to reduce in diameter from the innermost end (the end opposite the opening end) of the opening side insertion hole 11d toward the inside, an annular bottom surface 11f formed so as to protrude inward from the innermost end of the reduced diameter inner circumferential surface 11e in a direction perpendicular to the central axis C, and a recessed bottom surface 11g formed from the inner peripheral edge of the annular bottom surface 11f so as to be recessed from the annular bottom surface 11f.

この場合、モータ1をフランジ部20を介してボディ10に固定した状態で、挿入孔11の開口側挿入孔11dの内周面が円胴部2の外周面との間に隙間を有して該円胴部2及び軸受け部4bの周囲を囲むと共に、環状底面11fが、円胴部2の軸受け部4b側の端面と間隔を存して該端面に対面し、また、凹部底面11gが軸受け部4bと間隔を存して該軸受け部4bに対向するように、開口側挿入孔11dの内径及び深さ、環状底面11fの外径及び内径と中心軸線C方向での位置、凹部底面11gの外径及び深さ(環状底面11fからの深さ)が設定されている。 In this case, when the motor 1 is fixed to the body 10 via the flange portion 20, the inner peripheral surface of the opening side insertion hole 11d of the insertion hole 11 surrounds the circumference of the cylindrical portion 2 and the bearing portion 4b with a gap between it and the outer peripheral surface of the cylindrical portion 2, the annular bottom surface 11f faces the end face of the cylindrical portion 2 on the bearing portion 4b side with a gap therebetween, and the recessed portion bottom surface 11g faces the bearing portion 4b with a gap between them. The inner diameter and depth of the opening side insertion hole 11d, the outer diameter and inner diameter of the annular bottom surface 11f and its position in the direction of the central axis C, and the outer diameter and depth of the recessed portion bottom surface 11g (depth from the annular bottom surface 11f) are set so that.

そして、付勢部材40は、軸受け部4bの周囲に円胴部2と同芯に(付勢部材40の中心軸線を円胴部2の中心軸線Cに一致もしくはほぼ一致させて)配設され、その両端の端巻回部41(1)、41(N)のうちの端巻回部41(1)が円胴部2の軸受け部4b側の端面に圧接されると共に、端巻回部41(N)が挿入孔11の環状底面11fに圧接される。 The biasing member 40 is disposed around the bearing portion 4b concentrically with the cylindrical portion 2 (with the central axis of the biasing member 40 coinciding or nearly coinciding with the central axis C of the cylindrical portion 2), and of the end windings 41(1) and 41(N) at both ends, the end windings 41(1) are pressed against the end surface of the cylindrical portion 2 on the bearing portion 4b side, and the end windings 41(N) are pressed against the annular bottom surface 11f of the insertion hole 11.

さらに、本実施形態では、付勢部材40の両端の端巻回部41(1),41(N)のうち、円胴部2の端面に圧接される端巻回部41(1)の外径は、円胴部2の大径部2bの外周部を形成するヨーク2byの内径とほぼ同一の径に形成されている。また、挿入孔11の環状底面11fに圧接される端巻回部41(N)の外径は、挿入孔11の縮径内周面11eの環状底面11f側の端部の内径とほぼ同一の径に形成されている。 Furthermore, in this embodiment, of the end winding portions 41(1), 41(N) at both ends of the urging member 40, the outer diameter of the end winding portion 41(1) that is pressed against the end face of the cylindrical portion 2 is formed to be approximately the same diameter as the inner diameter of the yoke 2by that forms the outer periphery of the large diameter portion 2b of the cylindrical portion 2. In addition, the outer diameter of the end winding portion 41(N) that is pressed against the annular bottom surface 11f of the insertion hole 11 is formed to be approximately the same diameter as the inner diameter of the end of the reduced diameter inner circumferential surface 11e of the insertion hole 11 on the annular bottom surface 11f side.

このため、端巻回部41(1)が,円胴部2の大径部2bのヨーク2byの内側に嵌合し、巻回部41(N)が、挿入孔11の縮径内周面11eの環状底面11f側の端部に嵌合するようになっている。これにより、付勢部材40の巻回部41(1)が円胴部2に対して円胴部2の中心軸線Cに直交する方向(交差方向)に変位するのが抑制(制限)されると共に、巻回部41(N)がボディ10に対して円胴部2の中心軸線Cに直交する方向(交差方向)に変位するのが抑制(制限)されるようになっている。
本実施形態は、以上説明した事項以外は、第2実施形態と同じである。かかる本実施形態においても、第2実施形態と同様の効果を奏することができる。
For this reason, the end wound portion 41(1) fits inside the yoke 2by of the large diameter portion 2b of the cylindrical portion 2, and the wound portion 41(N) fits into the end portion on the annular bottom surface 11f side of the reduced diameter inner circumferential surface 11e of the insertion hole 11. This prevents (limits) the wound portion 41(1) of the urging member 40 from displacing in a direction perpendicular to the central axis C of the cylindrical portion 2 (intersecting direction) relative to the cylindrical portion 2, and also prevents (limits) the displacement of the wound portion 41(N) in a direction perpendicular to the central axis C of the cylindrical portion 2 (intersecting direction) relative to the body 10.
Except for the points described above, this embodiment is the same as the second embodiment. This embodiment can also achieve the same effects as the second embodiment.

[他の実施形態]
本発明は、以上説明した実施形態に限定されるものではなく、他の実施形態を採用することもできる。以下に他の実施形態をいくつか例示する。第1実施形態では、付勢部材30の代わりに、例えば第2実施形態で説明した付勢部材40を円胴部2の軸受け部4b側の端面と挿入孔11の底面との間に介装してもよい。
[Other embodiments]
The present invention is not limited to the above-described embodiment, and other embodiments may be adopted. Some other embodiments are exemplified below. In the first embodiment, instead of the biasing member 30, for example, the biasing member 40 described in the second embodiment may be interposed between the end face of the cylindrical portion 2 on the bearing portion 4b side and the bottom surface of the insertion hole 11.

また、第1実施形態の付勢部材30の両端の巻回部31のうち、円胴部2側の巻回部31(1)(端巻回部)は、円胴部2に対して中心軸線Cに直交する交差方向に変位するのが制限されるように、例えば第2実施形態又は第3実施形態と同様の形態で円胴部2に対して嵌合されていてもよい。 In addition, of the winding portions 31 at both ends of the biasing member 30 in the first embodiment, the winding portion 31(1) (end winding portion) on the cylindrical portion 2 side may be fitted to the cylindrical portion 2 in a form similar to that of the second or third embodiment, for example, so that displacement in a cross direction perpendicular to the central axis C relative to the cylindrical portion 2 is restricted.

また、第1実施形態の付勢部材30の両端の巻回部31のうち、挿入孔11の底面側の巻回部31(N)(端巻回部)は、挿入孔11の底面に対して中心軸線Cに直交する交差方向に変位するのが制限されるように、例えば第2実施形態又は第3実施形態と同様の形態で挿入孔11に嵌合されていてもよい。 In addition, of the winding portions 31 at both ends of the urging member 30 in the first embodiment, the winding portion 31(N) (end winding portion) on the bottom side of the insertion hole 11 may be fitted into the insertion hole 11 in a form similar to that of the second or third embodiment, for example, so that displacement in a cross direction perpendicular to the central axis C relative to the bottom surface of the insertion hole 11 is restricted.

また、第2実施形態又は第3実施形態では、付勢部材40の代わりに、例えば第1実施形態で説明した付勢部材30を円胴部2の軸受け部4b側の端面と挿入孔11の底面との間に介装してもよい。 In addition, in the second or third embodiment, instead of the biasing member 40, for example, the biasing member 30 described in the first embodiment may be interposed between the end face of the cylindrical portion 2 on the bearing portion 4b side and the bottom surface of the insertion hole 11.

また、第2実施形態又は第3実施形態では、付勢部材40の両端の端巻回部41(1),41(N)のうち、端巻回部41(1)を円胴部2に嵌合させると共に、端巻回部41(N)を挿入孔11に嵌合させるようにしたが、端巻回部41(1),41(N)の一方の端巻回部41(1)又は41(N)に関する当該嵌合を省略してもよい。 In addition, in the second and third embodiments, of the end winding portions 41(1) and 41(N) at both ends of the urging member 40, the end winding portion 41(1) is fitted into the cylindrical portion 2, and the end winding portion 41(N) is fitted into the insertion hole 11, but this fitting of one of the end winding portions 41(1) or 41(N) of the end winding portions 41(1) and 41(N) may be omitted.

また、前記付勢部材30は、その各巻回部31に凹凸を形成したが、例えば、付勢部材30の複数の巻回部のうち、1つもしくは一部の巻回部にだけ、凹凸を形成するようにしてもよい。同様に、前記付勢部材30の端巻回部41(1),41(N)以外の巻回部41(2)~41(N)のうち、1つもしくは一部の巻回部にだけ、凹凸を形成するようにしてもよい。 In addition, the biasing member 30 has each winding portion 31 formed with unevenness, but, for example, unevenness may be formed only on one or some of the multiple winding portions of the biasing member 30. Similarly, unevenness may be formed only on one or some of the winding portions 41(2) to 41(N) of the biasing member 30 other than the end winding portions 41(1) and 41(N).

1…モータ、2…円胴部、10…ボディ、11…挿入孔、l12…基準面、20…フランジ部、20a…被固定面、30,40…付勢部材、31,41…巻回部、41(1),41(N)…端巻回部。 1...motor, 2...body portion, 10...body, 11...insertion hole, l12...reference surface, 20...flange portion, 20a...fixed surface, 30, 40...biasing member, 31, 41...winding portion, 41(1), 41(N)...end winding portion.

Claims (4)

ボディの基準面に固定される被固定面を備えるフランジ部と、
前記フランジ部に前記被固定面側から固定される円胴部とを備えており、
前記円胴部外周面前記ボディに設けられた挿入孔の内周面との間に隙間をあけた状態で前記挿入孔の内部に配置され、
前記円胴部の中心軸線方向の両端部のうち、前記フランジ部に固定される一方側の端部とは逆の他方側の端部は、前記挿入孔の底部に配置される付勢部材から前記一方側に向かって付勢されているモータの固定構造において、
前記円胴部の、前記フランジ部に固定される一方側の端部とは逆の他方側の端部には、軸受け部が設けられており、
前記挿入孔は、前記ボディの前記基準面側に設けられた大径挿入孔と、該大径挿入孔の内径よりも小さい内径で形成され前記挿入孔の底部側に設けられた小径挿入孔とを有しており、
前記付勢部材は前記円胴部の中心軸線周りに同芯円状に巻きまわした巻回部を複数設けることで形成されており、
前記巻回部の1つである第1巻回部は前記一方側に向かう方向での凹凸を該第1巻回部の周長方向で複数回繰り返して折り曲げられた弾性部材によって構成されており、
前記巻回部の1つである第2巻回部は前記第1巻回部に前記中心軸線と平行な方向である軸方向に複数箇所で接触しており、
前記付勢部材の前記軸方向の両端の巻回部である2つの端巻回部の中間部分の少なくとも一部の径方向内周が、前記軸受け部の外周に対向して配置され、前記中間部分の少なくとも一部の径方向外周が、前記小径挿入孔の内周に対向して配置されていることを特徴とするモータの固定構造。
a flange portion having a fixed surface that is fixed to a reference surface of the body;
a cylindrical portion fixed to the flange portion from the fixed surface side,
the cylindrical portion is disposed inside the insertion hole provided in the body with a gap between an outer peripheral surface of the cylindrical portion and an inner peripheral surface of the insertion hole,
In a fixing structure for a motor, an end portion of the cylindrical portion in a central axis direction opposite to an end portion fixed to the flange portion is biased toward the one side by a biasing member disposed at a bottom of the insertion hole,
a bearing portion is provided at an end portion of the cylindrical portion opposite to the end portion fixed to the flange portion,
the insertion hole has a large diameter insertion hole provided on the reference surface side of the body, and a small diameter insertion hole formed with an inner diameter smaller than an inner diameter of the large diameter insertion hole and provided on a bottom side of the insertion hole,
the biasing member is formed by providing a plurality of winding portions wound concentrically around a central axis of the cylindrical portion,
a first winding portion, which is one of the winding portions, is made of an elastic member that is bent multiple times in a circumferential direction of the first winding portion so that the concave and convex portions in the direction toward the one side are repeatedly bent,
a second winding portion, which is one of the winding portions, contacts the first winding portion at a plurality of points in an axial direction that is a direction parallel to the central axis;
a first end winding portion that is a winding portion at both ends of the axial direction of the biasing member, the first end winding portion having a radial inner periphery that faces the outer periphery of the bearing portion, and the second end winding portion having a radial outer periphery that faces the inner periphery of the small diameter insertion hole, the first end winding portion having a radial inner periphery that faces the inner periphery of the small diameter insertion hole ,
請求項1に記載のモータの固定構造において
前記付勢部材の前記軸方向の両端の巻回部である2つの端巻回部のうち少なくとも一方は前記モータが前記ボディに固定された状態で平面状の巻回部となるように形成されていることを特徴とするモータの固定構造。
The motor fixing structure according to claim 1 ,
A motor fixing structure, characterized in that at least one of the two end winding portions, which are winding portions at both ends of the axial direction of the urging member, is formed so as to become a planar winding portion when the motor is fixed to the body.
請求項1又は2に記載のモータの固定構造において
前記付勢部材の前記軸方向の両端の巻回部である2つの端巻回部のうち少なくとも前記一方側の端巻回部であるモータ側端巻回部は、前記円胴部に対して前記軸方向と直交する方向である交差方向において該円胴部に対する相対移動を制限するように該円胴部に嵌め合わされていることを特徴とするモータの固定構造。
The motor fixing structure according to claim 1 or 2 ,
A motor fixing structure characterized in that at least one of the two end winding portions, which are winding portions at both ends of the axial direction of the urging member, which is the motor side end winding portion, is fitted into the cylindrical portion so as to limit relative movement with respect to the cylindrical portion in a cross direction that is a direction perpendicular to the axial direction.
請求項1~3のいずれか1項に記載のモータの固定構造において
前記付勢部材の前記軸方向の両端の巻回部である2つの端巻回部のうち少なくとも前記他方側の端巻回部であるボディ側端巻回部は、前記ボディに対して前記軸方向と直交する方向である交差方向において該ボディに対する相対移動を制限するよう該ボディに嵌め合わされていることを特徴とするモータの固定構造。
In the motor fixing structure according to any one of claims 1 to 3 ,
A motor fixing structure characterized in that at least the other end winding portion, which is one of the two end winding portions that are winding portions at both ends in the axial direction of the urging member, is fitted into the body so as to limit relative movement with respect to the body in a cross direction that is perpendicular to the axial direction.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005218235A (en) 2004-01-29 2005-08-11 Denso Corp Alternator for automobile
JP2008017568A (en) 2006-07-04 2008-01-24 Mitsuba Corp Electric motor
JP2016174438A (en) 2015-03-16 2016-09-29 株式会社デンソー Drive motor
JP2017073909A (en) 2015-10-08 2017-04-13 株式会社デンソー Driver

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005218235A (en) 2004-01-29 2005-08-11 Denso Corp Alternator for automobile
JP2008017568A (en) 2006-07-04 2008-01-24 Mitsuba Corp Electric motor
JP2016174438A (en) 2015-03-16 2016-09-29 株式会社デンソー Drive motor
JP2017073909A (en) 2015-10-08 2017-04-13 株式会社デンソー Driver

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