JP2006094625A - Motor driving mechanism - Google Patents

Motor driving mechanism Download PDF

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JP2006094625A
JP2006094625A JP2004276571A JP2004276571A JP2006094625A JP 2006094625 A JP2006094625 A JP 2006094625A JP 2004276571 A JP2004276571 A JP 2004276571A JP 2004276571 A JP2004276571 A JP 2004276571A JP 2006094625 A JP2006094625 A JP 2006094625A
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motor
drive mechanism
motor drive
weight
mechanism according
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Shigemasa Sato
重正 佐藤
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Nikon Corp
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Nikon Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a motor driving mechanism having no problems with damage and durability, having no restriction in use conditions, and silencing noise without increasing cost. <P>SOLUTION: The motor driving mechanism 10 is provided with a motor 11, a structure 12 for constituting at least a portion of a driven object, a gear box 13 integrally attached to or formed with the structure 12, an attachment member 14 for attaching the motor 11 to the gear box 13, and a gear train accommodated in the gear box 13 and transmitting a drive force from the motor 11 to the driven object. A weight member 16 is provided in the free section 141a of the attachment member 14, and reduces a primary eigen frequency of a vibration system comprising the motor 11 and the attachment member 14. The weight member 16 is adhered to the attachment member 14. Only weight component operates. A low-elasticity and high-relative density material is used and elastically attached to the attachment member 14. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、カメラのレンズ等を駆動するのに適したモータ駆動機構に関するものである。   The present invention relates to a motor drive mechanism suitable for driving a lens or the like of a camera.

図９は、従来のモータ駆動機構の一例を示す図である。
従来のモータ駆動機構２０は、モータ２１と、被駆動部の一部であるギヤ２８が設けられた構造体２２と、構造体２２に一体的に取り付けられ、モータ２１が取り付けられるギヤボックス２３と、ギヤボックス２３に収容され、モータ２１の駆動力をギヤ２８に伝えるギヤ列２７等とを備えている。 FIG. 9 is a diagram illustrating an example of a conventional motor drive mechanism.
A conventional motor drive mechanism 20 includes a motor 21, a structure 22 provided with a gear 28 that is a part of a driven part, a gear box 23 that is integrally attached to the structure 22 and to which the motor 21 is attached. And a gear train 27 that is housed in the gear box 23 and transmits the driving force of the motor 21 to the gear 28.

このように、モータを筐体に組み込んで、被駆動部をモータによって駆動する機器では、モータの駆動音や、動力伝達機構（例えば、ギヤ列）の駆動音などが筐体で増幅されて大きくなり、機器の騒音として問題となる。
この問題を解決するために、モータ付きのギヤボックスを、構造体に対して低剛性に取り付けることが提案されている（例えば、特許文献１）。しかし、低弾性材料は、強度が低く破損する可能性と耐久性に問題が残るため、使用条件に制約を受けると共に、一般材料に比べてコスト高である。
特開２００４−２０５９０７号公報 As described above, in a device in which the motor is incorporated in the housing and the driven part is driven by the motor, the driving sound of the motor, the driving sound of the power transmission mechanism (for example, a gear train), and the like are amplified and greatly increased by the housing. It becomes a problem as noise of equipment.
In order to solve this problem, it has been proposed to attach a gear box with a motor to the structure with low rigidity (for example, Patent Document 1). However, since the low elastic material has a low strength and has a problem of possibility of breakage and durability, it is restricted in use conditions and is more expensive than a general material.
JP 2004-205907 A

本発明の課題は、破損の可能性や耐久性に問題がなく、使用条件に制約を受けずに、しかも、コストを上げることなく静音化を実現するモータ駆動機構を提供することである。   It is an object of the present invention to provide a motor drive mechanism that achieves noise reduction without any problem in the possibility of breakage and durability, without being restricted by use conditions, and without increasing costs.

本発明は、以下のような解決手段により、前記課題を解決する。なお、理解を容易にするために、本発明の実施形態に対応する符号を付して説明するが、これに限定されるものではない。
請求項１の発明は、モータ（１１）と、被駆動部の少なくとも一部を構成する構造体（１２）と、前記構造体に一体的に取り付けられる、もしくは一体成形されるギヤボックス（１３）と、前記モータを前記ギヤボックスに取り付ける取付部材（１４）と、前記ギヤボックスに収容され、前記モータの駆動力を前記被駆動部に伝えるギヤ列と、を備えるモータ駆動機構であって、前記モータ及び／又は前記取付部材に取り付けられ、前記モータと前記取付部材とからなる振動系の１次固有振動数の値を低下させる固有値低下手段（１６）を備えること、を特徴とするモータ駆動機構である。
請求項２の発明は、請求項１に記載のモータ駆動機構において、前記取付部材は、前記モータの出力軸の軸受け部（１４３）とは反対側の軸先端部を回転可能に支持する支持部（１４４）を有すること、を特徴とするモータ駆動機構である。
請求項３の発明は、請求項１又は請求項２に記載のモータ駆動機構において、前記固有値低下手段は、前記モータ及び／又前記取付部材に貼付される重量成分のみが影響する重り部材であること、を特徴とするモータ駆動機構である。
請求項４の発明は、請求項１から請求項３までのいずれか１項に記載のモータ駆動機構において、前記固有値低下手段は、前記モータ及び／又前記取付部材に貼付される低弾性高比重材の重り部材であること、を特徴とするモータ駆動機構である。
請求項５の発明は、請求項１から請求項４までのいずれか１項に記載のモータ駆動機構において、前記重り部材は、弾性を有して取り付けられること、を特徴とするモータ駆動機構である。
請求項６の発明は、請求項１から請求項５までのいずれか１項に記載のモータ駆動機構において、前記重り部材は、その重量が前記モータと前記取付部材の合計重量に対して、１０〜２０％となること、を特徴とするモータ駆動機構である。
請求項７の発明は、請求項１から請求項６までのいずれか１項に記載のモータ駆動機構において、前記重り部材は、その密度が４〜１１を有する成型材であること、を特徴とするモータ駆動機構である。
請求項８の発明は、請求項１から請求項７までのいずれか１項に記載のモータ駆動機構において、前記重り部材は、その弾性率が数百ＭＰａ程度の柔軟性を有する成型材であること、を特徴とするモータ駆動機構である。
請求項９の発明は、請求項１又は請求項２に記載のモータ駆動機構において、前記固有値低下手段は、前記取付部材の曲げ部に形成された曲げ剛性を低下させる切欠き部（１４５ａ）であること、を特徴とするモータ駆動機構である。 The present invention solves the above problems by the following means. In addition, in order to make an understanding easy, although the code | symbol corresponding to embodiment of this invention is attached | subjected and demonstrated, it is not limited to this.
The invention of claim 1 includes a motor (11), a structure (12) constituting at least a part of a driven part, and a gear box (13) integrally attached to or integrally formed with the structure. A motor drive mechanism comprising: a mounting member (14) for attaching the motor to the gear box; and a gear train housed in the gear box and transmitting a driving force of the motor to the driven part, A motor driving mechanism comprising eigenvalue lowering means (16) attached to the motor and / or the mounting member and configured to lower a value of a primary natural frequency of a vibration system including the motor and the mounting member. It is.
According to a second aspect of the present invention, in the motor drive mechanism according to the first aspect, the mounting member is a support portion that rotatably supports a shaft tip portion opposite to the bearing portion (143) of the output shaft of the motor. (144) It is a motor drive mechanism characterized by having.
According to a third aspect of the present invention, in the motor drive mechanism according to the first or second aspect, the eigenvalue lowering means is a weight member affected only by a weight component attached to the motor and / or the mounting member. This is a motor drive mechanism characterized by that.
According to a fourth aspect of the present invention, in the motor drive mechanism according to any one of the first to third aspects, the eigenvalue lowering means is a low elastic high specific gravity affixed to the motor and / or the mounting member. A motor drive mechanism characterized by being a weight member of a material.
The invention according to claim 5 is the motor drive mechanism according to any one of claims 1 to 4, wherein the weight member is attached with elasticity. is there.
According to a sixth aspect of the present invention, in the motor drive mechanism according to any one of the first to fifth aspects, the weight member has a weight of 10 with respect to a total weight of the motor and the mounting member. It is a motor drive mechanism characterized by -20%.
The invention of claim 7 is the motor drive mechanism according to any one of claims 1 to 6, wherein the weight member is a molding material having a density of 4 to 11. This is a motor drive mechanism.
The invention according to claim 8 is the motor drive mechanism according to any one of claims 1 to 7, wherein the weight member is a molding material having flexibility with an elastic modulus of about several hundred MPa. This is a motor drive mechanism characterized by that.
According to a ninth aspect of the present invention, in the motor drive mechanism according to the first or second aspect, the eigenvalue lowering means is a notch (145a) that lowers the bending rigidity formed in the bent portion of the mounting member. There is a motor drive mechanism characterized by being.

以上説明したように、本発明によれば、以下のような効果がある。
（１）モータと取付部材とからなる振動系の１次固有振動数の値を低下させる固有値低下手段を備えるので、モータと取付部材の剛性を下げずに、１次固有値を下げることができ、振動伝達を少なくして、静音化を図ることができる。
例えば、固有値低下手段として、重量成分のみが影響する、低弾性高比重材の重り部材を、取付部材に貼り付けることにより、共振周波数の決定要素である密度を上げることができ、しかも、調整が重り部材の重量を変更することで可能となり、取付部材などの形状変更を必要としない。
（２）また、モータに低弾性高比重材の重り部材を貼り付けることで、振動源であるモータの振動を低減することが可能となり、１次固有値を下げることと、振動源の振動を減らすことが同時に可能となる。この場合も、モータの特性に合わせて、重り部材の重量を調整することで簡単に行える。
（３）さらに、取付部材の曲げ部に曲げ剛性を低下させる切欠き部を形成することで、共振周波数の決定要素である曲げ剛性を下げることができ、振動伝達を少なくして、静音化を図ることができる。
（４）取付部材として、モータの出力軸の軸受け部とは反対側の軸先端部を回転可能に支持する支持部を有するものにも、低弾性高比重材の重り部材を貼り付けることが、静音化のために有効である。 As described above, the present invention has the following effects.
(1) Since it has eigenvalue lowering means for lowering the value of the primary natural frequency of the vibration system composed of the motor and the mounting member, the primary eigenvalue can be lowered without lowering the rigidity of the motor and the mounting member, It is possible to reduce the vibration and reduce the noise.
For example, as the eigenvalue lowering means, by attaching a weight member of a low elastic and high specific gravity material, which is affected only by the weight component, to the mounting member, it is possible to increase the density, which is a determinant of the resonance frequency, and to adjust it. It becomes possible by changing the weight of the weight member, and it is not necessary to change the shape of the mounting member or the like.
(2) Further, by attaching a weight member of a low elastic high specific gravity material to the motor, it is possible to reduce the vibration of the motor that is the vibration source, and to lower the primary eigenvalue and reduce the vibration of the vibration source. It becomes possible at the same time. Also in this case, it can be easily performed by adjusting the weight of the weight member in accordance with the characteristics of the motor.
(3) Furthermore, by forming a notch portion that lowers the bending rigidity in the bending portion of the mounting member, the bending rigidity that is the determining factor of the resonance frequency can be lowered, vibration transmission is reduced, and noise reduction is achieved. Can be planned.
(4) Attaching a weight member of a low elastic high specific gravity material to an attachment member having a support portion that rotatably supports a shaft tip portion opposite to the bearing portion of the output shaft of the motor; Effective for noise reduction.

本発明は、破損の可能性や耐久性に問題がなく、使用条件に制約を受けずに、しかも、コストを上げることなく静音化を実現するという目的を、取付部材の自由部やモータのケースに、低弾性高比重材の重り部材を貼り付けることによって実現する。   The object of the present invention is to provide a free part of a mounting member and a motor case without any problem in the possibility of breakage and durability, and without being restricted by use conditions and at the same time realizing a low noise without increasing the cost. Further, it is realized by attaching a weight member of a low elastic high specific gravity material.

以下、図面等を参照して、本発明の実施例をあげて、さらに詳しく説明する。
図１は、本発明によるモータ駆動機構の実施例１を示す斜視図、図２は、実施例１に係るモータ駆動機構のモータ及び取付部材を示す斜視図である。
実施例１のモータ駆動機構１０は、モータ１１と、被駆動部の少なくとも一部を構成する構造体１２と、構造体１２に一体的に取り付けられる、もしくは一体成形されるギヤボックス１３と、モータ１１をギヤボックス１３に取り付ける取付部材１４と、ギヤボックス１３に収容され、モータ１１の駆動力を被駆動部に伝えるギヤ列（不図示）等とを備えている。取付部材１４は、３本の固定ねじ１５でギヤボックス１３に固定されている。 Hereinafter, the present invention will be described in more detail with reference to the drawings and the like.
1 is a perspective view showing a first embodiment of a motor drive mechanism according to the present invention, and FIG. 2 is a perspective view showing a motor and an attachment member of the motor drive mechanism according to the first embodiment.
The motor drive mechanism 10 according to the first embodiment includes a motor 11, a structure 12 that constitutes at least a part of a driven part, a gear box 13 that is integrally attached to or integrally formed with the structure 12, and a motor. 11 is attached to the gear box 13, and a gear train (not shown), which is housed in the gear box 13 and transmits the driving force of the motor 11 to the driven part. The attachment member 14 is fixed to the gear box 13 with three fixing screws 15.

図３、図４は、実施例１に係るモータ駆動機構のモータ及び取付部材を説明する図である。
図３に示すように、モータ取付部（モータ１１と取付部材１４）を１つの構造物とすると、その剛性値を最適化するためには、（１）シミュレーションによる形状の決定作業、（２）実物での確認作業、の繰り返しを必要とする。
特に、ギヤボックス１３と一体的に、前記モータ取付部を構成すると、形状の複雑さから計算値と実際がなかなか合致せず、また、共振点の数が多くなり、振動の伝達を減少させることによる静音化は難しくなる。
実施例１のモータ駆動機構１０は、モータ１１を取付部材１４に固定し、その取付部材１４をギヤボックス１３に３本の固定ねじ１５で固定するので、比較的簡単で剛性の最適化を図るのに適した構造である。
この場合に、取付部材１４のボックス取付部１４１の幅ｂ、長さＬ１、厚さｔ、モータ取付部１４２の長さＬ２、そして、ボックス取付部１４１の固定部１４１ａの長さＬ１ａ、自由部１４１ｂの長さＬ１ｂにより剛性値が計算される。 3 and 4 are diagrams illustrating the motor and the attachment member of the motor drive mechanism according to the first embodiment.
As shown in FIG. 3, when the motor mounting portion (the motor 11 and the mounting member 14) is a single structure, in order to optimize the rigidity value, (1) the shape determination work by simulation, (2) It is necessary to repeat the confirmation work with the actual product.
In particular, if the motor mounting part is configured integrally with the gear box 13, the calculated value and the actual value do not readily match due to the complexity of the shape, and the number of resonance points increases, thereby reducing vibration transmission. It becomes difficult to reduce noise.
In the motor drive mechanism 10 according to the first embodiment, the motor 11 is fixed to the mounting member 14, and the mounting member 14 is fixed to the gear box 13 with the three fixing screws 15, so that the rigidity is relatively simple and the rigidity is optimized. It is a suitable structure.
In this case, the width b, length L1, and thickness t of the box mounting portion 141 of the mounting member 14, the length L2 of the motor mounting portion 142, the length L1a of the fixing portion 141a of the box mounting portion 141, and the free portion The stiffness value is calculated from the length L1b of 141b.

ここで、計算される前記モータ取付部の振動系の１次固有振動数の値（１次固有値）がモータ１１の回転周波数よりも小さくなるように、各部寸法を決定する。
１次固有値を小さくするために、取付部材１４の厚さｔを小さくするか、又は、取付部材１４の自由部１４０ｂの長さＬ１ｂを長くすることで、モータ１１の位置が振動の方向に振れやすくなり、モータ１１の出力軸（モータシャフト）に付けられた第１ギヤと、ギヤ列の第２ギヤとの噛み合わせが大きく変化してしまい、逆に、振動又は音の発生を招いてしまうことになる。
また、モータ１１の位置の変化を小さくするためには、厚さｔを大きくして剛性をあげなくてはならず、１次固有値を小さくすることに反してしまう。
一方、モータ１１の回転数を低くして駆動する場合には、１次固有値を下げなくてはならず、なおさら難しくなる。 Here, the dimensions of each part are determined so that the calculated value of the primary natural frequency (primary natural value) of the vibration system of the motor mounting part is smaller than the rotational frequency of the motor 11.
In order to reduce the primary eigenvalue, the thickness t of the mounting member 14 is decreased, or the length L1b of the free portion 140b of the mounting member 14 is increased, so that the position of the motor 11 is swung in the vibration direction. As a result, the meshing between the first gear attached to the output shaft (motor shaft) of the motor 11 and the second gear of the gear train is greatly changed, and conversely, the generation of vibration or sound is caused. It will be.
In order to reduce the change in the position of the motor 11, the thickness t must be increased to increase the rigidity, which is contrary to the reduction of the primary eigenvalue.
On the other hand, when the motor 11 is driven at a low rotational speed, the primary eigenvalue must be lowered, and it becomes even more difficult.

図４に示すように、取付部材１４の自由部１４１ａの先端にモータ１１が集中荷重としてかかった「片持ちはり」のモデルを考えると、共振周波数ｆは、次式で与えられる。なお、図４中、矢印Ａは、モータ１１の位置変化を示している。
ｆ∝ｔ√（Ｅ／ρ） ・・・（１）
ただし、Ｅ：曲げ剛性、ρ：密度である。 As shown in FIG. 4, considering a “cantilever” model in which the motor 11 is applied as a concentrated load to the tip of the free portion 141 a of the mounting member 14, the resonance frequency f is given by the following equation. In FIG. 4, an arrow A indicates a change in the position of the motor 11.
f∝t√ (E / ρ) (1)
However, E: bending rigidity, ρ: density.

図５は、実施例１に係るモータ駆動機構のモータ及び取付部材の周波数特性を示す図である。
共振周波数ｆを、モータ１１の回転周波数ｆｎより下げることが振動伝達を少なくし音の発生を小さくするのに有効である。
しかし、（１）回転周波数ｆｎは、駆動負荷により変動する、(２)固定条件や形状により計算で求めた剛性と実際の剛性がうまく一致しない、（３）モータ１１により高周波の出方が異なる、などの理由で固定位置の変更、材質の変更、構造の変更、モータの変更などを行い、周波数を合わせる必要があり、開発期間の長期化と開発費の増加をまねいていた。 FIG. 5 is a diagram illustrating frequency characteristics of the motor and the mounting member of the motor drive mechanism according to the first embodiment.
Lowering the resonance frequency f below the rotation frequency fn of the motor 11 is effective for reducing vibration transmission and reducing sound generation.
However, (1) the rotational frequency fn varies depending on the driving load, (2) the rigidity obtained by calculation according to the fixed conditions and shape does not match the actual rigidity well, and (3) how the high frequency is output varies depending on the motor 11. For this reason, it is necessary to change the fixed position, change the material, change the structure, change the motor, etc., and adjust the frequency, which leads to longer development time and higher development costs.

そこで、実施例１では、図２に示すように、実施例１のモータ駆動機構１０は、取付部材１４の自由部１４１ａに、モータ１１と取付部材１４とからなる振動系の１次固有振動数の値を低下させる重り部材（固有値低下手段）１６が設けられている。つまり、実施例１では、式（１）のρ（密度）を大きくして、ｆ（１次固有値）を低下させるようにしたものである。
この重り部材１６は、取付部材１４に低弾性高比重材を貼り付けるので、取付部材１４に弾性成分の影響がなく、重量成分のみが影響する。重り部材１６の形状は、成型できれば、任意の形状のものが使用可能である。また、この高比重材の比重は、４〜１１程度の間で調整可能である。
さらに、重り部材１６は、取付部材１４に弾性のある接着剤などで、弾性を有して取り付けられている。 Therefore, in the first embodiment, as shown in FIG. 2, the motor drive mechanism 10 of the first embodiment includes the primary natural frequency of the vibration system including the motor 11 and the mounting member 14 in the free portion 141 a of the mounting member 14. A weight member (eigen value lowering means) 16 for lowering the value is provided. That is, in Example 1, ρ (density) in the equation (1) is increased to reduce f (primary eigenvalue).
Since the weight member 16 affixes a low elastic high specific gravity material to the attachment member 14, the attachment member 14 is not affected by the elastic component, and only the weight component is affected. As long as the weight member 16 can be molded, any shape can be used. Moreover, the specific gravity of this high specific gravity material can be adjusted between about 4-11.
Further, the weight member 16 is attached to the attachment member 14 with elasticity using an elastic adhesive or the like.

重り部材１６は、その重量がモータ１１と取付部材１４の合計重量に対して、１０〜２０％となることが好ましい。これは、振動体に付加して振動エネルギーを吸収する動吸振器のモデルを考えると、通常、付加体の重量の最適値が、０．１から０．２であるからである。   The weight member 16 preferably has a weight of 10 to 20% with respect to the total weight of the motor 11 and the mounting member 14. This is because the optimum value of the weight of the additional body is usually 0.1 to 0.2 when considering a model of a dynamic vibration absorber that is added to the vibration body and absorbs vibration energy.

また、重り部材１６は、その密度が４〜１１を有する成型材であることが好ましい。例えば、モータ１１を５ｇｆ前後とし、重り部材１６を板状の重りとすると、形状は、５ｍｍ×１０ｍｍ×１ｍｍであり、０．５×１×０．１＝０．０５ｃｍ3となる。５ｇｆのモータ１１の１０〜２０％とすると、０．５〜１ｇ程度であり、比重が１０とすると、重り部材１６の重さは、０．０５×１０＝０．５ｇｆである。 The weight member 16 is preferably a molding material having a density of 4 to 11. For example, when the motor 11 is about 5 gf and the weight member 16 is a plate-like weight, the shape is 5 mm × 10 mm × 1 mm, and 0.5 × 1 × 0.1 = 0.05 cm 3 . If it is 10 to 20% of the motor 11 of 5 gf, it is about 0.5 to 1 g, and if the specific gravity is 10, the weight of the weight member 16 is 0.05 × 10 = 0.5 gf.

重り部材１６は、その剛性が硬質ゴム以下で調整可能であり、その弾性率が数百ＭＰａ程度の柔軟性を有する成型材であることが好ましい。例えば、軟質エラストマーの弾性は、数１０ＭＰａ以下であり、硬質ゴムは、それ以下である。通常、プラスチック材の曲げ弾性率は、２０００ＭＰａ以上であり、その１０％で２００ＭＰａとなり、これ以下であれば、全体の曲げ剛性に影響が少ないからである。   The weight member 16 is preferably a molding material whose rigidity can be adjusted to be equal to or less than that of hard rubber, and whose flexibility is approximately several hundred MPa. For example, the elasticity of a soft elastomer is several tens of MPa or less, and that of hard rubber is less than that. Usually, the bending elastic modulus of the plastic material is 2000 MPa or more, and 10% thereof is 200 MPa, and if it is less than this, there is little influence on the entire bending rigidity.

実施例１によれば、以下のような種々の効果がある。
（１）取付部材１４の自由部１４１ａに、低弾性高比重材の重り部材１６を貼り付ける構造としたので、取付部材１４の剛性を下げずに、１次固有値を下げることができ、振動伝達を少なくして、静音化を図ることができる。
（２）低弾性高比重材の重り部材１６を貼り付けるので、取付部材１４には重量成分のみが影響し、共振周波数の決定要素である密度を上げることができ、しかも、重り部材１６の重量を変更することで調整が可能となり、取付部材１４の形状変更を必要としない。
（３）ギヤボックスのモータ取付部、あるいは、取付部材１４の形状を変更することなく、これらの１次固有値を、モータ１１の回転周波数より小さく設定することが容易にでき、しかも、低コストで実現可能となる。 The first embodiment has the following various effects.
(1) Since the weight member 16 of a low elastic high specific gravity material is attached to the free portion 141a of the mounting member 14, the primary eigenvalue can be lowered without lowering the rigidity of the mounting member 14, and vibration transmission can be achieved. The noise can be reduced by reducing the noise.
(2) Since the weight member 16 of a low elastic high specific gravity material is affixed, only the weight component affects the attachment member 14, and the density which is a determinant of the resonance frequency can be increased. In addition, the weight of the weight member 16 Adjustment is possible by changing, and the shape of the mounting member 14 does not need to be changed.
(3) These primary eigenvalues can be easily set smaller than the rotation frequency of the motor 11 without changing the shape of the motor mounting portion of the gear box or the mounting member 14, and at a low cost. It becomes feasible.

図６は、本発明によるモータ駆動機構の実施例２を示す図である。
なお、以下に示す各実施例では、前述した実施例１と同様な機能を果たす部分には、同一の符号又は末尾に統一した符号を付して、重複する説明や図面を適宜省略する。
実施例２のモータ駆動機構１０Ｂでは、取付部材１４Ｂは、モータ１１の出力軸（モータシャフト）１１ａの軸受け部１４３とは反対側の軸先端部を回転可能に支持する支持部１４４を備えている。
この取付部材１４Ｂの場合にも、低弾性高比重材の重り部材１６を貼り付ける構造としたので、取付部材１４Ｂの剛性を下げずに、１次固有値を下げることができる。モータシャフト１１ａの先端受けとなる支持部１４４があることで、モータシャフトのあばれ（振りまわり）をおさえることが可能であるが、取付部材１４Ｂがモータシャフトの回転により発生する振動等で加振されてしまう。従って、重り部材１６で、この部分の共振点を下げている。 FIG. 6 is a diagram showing a second embodiment of the motor drive mechanism according to the present invention.
In the following embodiments, the same functions as those in the first embodiment described above are denoted by the same reference numerals or the same reference numerals at the end, and repeated descriptions and drawings are appropriately omitted.
In the motor drive mechanism 10B of the second embodiment, the attachment member 14B includes a support portion 144 that rotatably supports the shaft tip portion on the opposite side of the bearing portion 143 of the output shaft (motor shaft) 11a of the motor 11. .
Also in the case of this attachment member 14B, since the weight member 16 of the low elastic high specific gravity material is attached, the primary eigenvalue can be lowered without lowering the rigidity of the attachment member 14B. The presence of the support portion 144 that serves as the front end receiver of the motor shaft 11a makes it possible to suppress the rotation (swinging) of the motor shaft. However, the mounting member 14B is vibrated by vibrations generated by the rotation of the motor shaft. End up. Therefore, the weight member 16 lowers the resonance point of this portion.

図７は、本発明によるモータ駆動機構の実施例３を示す図である。
実施例３のモータ駆動機構１０Ｂは、低弾性高比重材の重り部材１６Ｃ（１６Ｃ−１，１６Ｃ−２）を、モータ１１Ｃ（１１Ｃ−１，１１Ｃ−２）のケースに貼り付けたものである。
実施例３では、モータ１１Ｃのケースに、低弾性高比重材の重り部材１６Ｃを貼り付けることで、振動源であるモータの振動を低減することが可能となり、１次固有値を下げることと、振動源の振動を減らすことが同時に可能となる。この場合も、モータの特性に合わせて、重り部材１６Ｃの重量を変えて、比重を調整することが簡単に行える。
また、重り部材１６Ｃは、剛性が硬質ゴム以下であるので、図７（ｂ）に示すように、モータ１１Ｃ−２に平坦部がある場合はもとより、図７（ａ）に示すように、モータ１１Ｃ−１が円筒状でも、貼り付けることが可能である。
さらに、貼り付け場所については、モータの磁石が内側部分にあるのに対して、モータの外側に貼り付けることで効果が得られる。この理由は、モータのケースの振動が大きい部位が磁石の貼り付けられていない部分であるからである。 FIG. 7 is a diagram showing a third embodiment of the motor drive mechanism according to the present invention.
In the motor drive mechanism 10B of the third embodiment, a weight member 16C (16C-1, 16C-2) made of a low elastic and high specific gravity material is attached to the case of the motor 11C (11C-1, 11C-2). .
In Example 3, it is possible to reduce the vibration of the motor, which is the vibration source, by attaching the weight member 16C of the low elastic high specific gravity material to the case of the motor 11C. It is possible to reduce the vibration of the source at the same time. Also in this case, the specific gravity can be easily adjusted by changing the weight of the weight member 16C in accordance with the characteristics of the motor.
Since the weight member 16C has a rigidity equal to or less than that of hard rubber, as shown in FIG. 7B, the motor 11C-2 has a flat portion, as shown in FIG. Even if 11C-1 is cylindrical, it can be attached.
Furthermore, with respect to the affixing location, the effect is obtained by affixing to the outside of the motor, whereas the magnet of the motor is in the inner part. This is because the part where the vibration of the motor case is large is the part where the magnet is not attached.

図８は、本発明によるモータ駆動機構の実施例４を示す図である。
実施例４のモータ駆動機構１０Ｄは、取付部材１４Ｄの直角曲げ部１４５に曲げ剛性を低下させる切欠き部（固有値低下手段）１４５ａが形成されている。つまり、実施例４では、上述した式（１）のＥ（曲げ剛性）を、小さくするようにしたものである。
実施例４では、剛性値の調整は、切欠き部１４５ａの切り込みの幅ｅと、切り込み深さｄで行うことができる。
取付部材１４Ｄにおいても、自由部１４２の剛性は、モータ１１の位置変化が許容値内となるように、板厚ｔを決めることが可能となる。 FIG. 8 is a diagram showing a fourth embodiment of the motor drive mechanism according to the present invention.
In the motor drive mechanism 10D according to the fourth embodiment, a cutout portion (eigen value lowering means) 145a that lowers the bending rigidity is formed in the right-angled bending portion 145 of the mounting member 14D. That is, in Example 4, E (bending rigidity) of the above-described formula (1) is made small.
In the fourth embodiment, the rigidity value can be adjusted by the cut width e and the cut depth d of the notch 145a.
Also in the attachment member 14D, the rigidity of the free portion 142 can determine the plate thickness t so that the change in the position of the motor 11 is within an allowable value.

（変形例）
以上説明した実施例に限定されることなく、種々の変形や変更が可能であって、それらも本発明の均等の範囲内である。
（１）重り部材は、取付部材又はモータのケースに貼り付けた例で説明したが、両方に貼り付けてもよい。
（２）重り部材を貼り付けると共に、実施例４の切欠き部を設けるようにしてもよい。 (Modification)
The present invention is not limited to the embodiments described above, and various modifications and changes are possible, and these are also within the equivalent scope of the present invention.
(1) Although the weight member has been described as an example of being attached to the attachment member or the motor case, it may be attached to both.
(2) While attaching a weight member, you may make it provide the notch part of Example 4. FIG.

本発明によるモータ駆動機構の実施例１を示す斜視図である。It is a perspective view which shows Example 1 of the motor drive mechanism by this invention. 実施例１に係るモータ駆動機構のモータ及び取付部材を示す斜視図である。It is a perspective view which shows the motor and attachment member of the motor drive mechanism which concern on Example 1. FIG. 実施例１に係るモータ駆動機構のモータ及び取付部材を説明する図である。It is a figure explaining the motor and attachment member of the motor drive mechanism which concern on Example 1. FIG. 実施例１に係るモータ駆動機構のモータ及び取付部材を説明する図である。It is a figure explaining the motor and attachment member of the motor drive mechanism which concern on Example 1. FIG. 実施例１に係るモータ駆動機構のモータ及び取付部材の周波数特性を示す図であるIt is a figure which shows the frequency characteristic of the motor and attachment member of the motor drive mechanism which concerns on Example 1. FIG. 本発明によるモータ駆動機構の実施例２を示す斜視図である。It is a perspective view which shows Example 2 of the motor drive mechanism by this invention. 本発明によるモータ駆動機構の実施例３を示す斜視図である。It is a perspective view which shows Example 3 of the motor drive mechanism by this invention. 本発明によるモータ駆動機構の実施例４を示す斜視図である。It is a perspective view which shows Example 4 of the motor drive mechanism by this invention. 従来のモータ駆動機構の一例を示す斜視図である。It is a perspective view which shows an example of the conventional motor drive mechanism.

符号の説明Explanation of symbols

１０ モータ駆動機構
１１ モータ
１２ 構造体
１３ ギヤボックス
１４ 取付部材
１４５ａ 切欠き部
１５ 固定ねじ
１６ 重り部材 DESCRIPTION OF SYMBOLS 10 Motor drive mechanism 11 Motor 12 Structure 13 Gear box 14 Mounting member 145a Notch 15 Fixing screw 16 Weight member

Claims (9)

モータと、
被駆動部の少なくとも一部を構成する構造体と、
前記構造体に一体的に取り付けられる、もしくは一体成形されるギヤボックスと、
前記モータを前記ギヤボックスに取り付ける取付部材と、
前記ギヤボックスに収容され、前記モータの駆動力を前記被駆動部に伝えるギヤ列と、
を備えるモータ駆動機構であって、
前記モータ及び／又は前記取付部材に取り付けられ、前記モータと前記取付部材とからなる振動系の１次固有振動数の値を低下させる固有値低下手段を備えること、
を特徴とするモータ駆動機構。 A motor,
A structure constituting at least a part of the driven part;
A gear box that is integrally attached to or integrally molded with the structure;
An attachment member for attaching the motor to the gear box;
A gear train housed in the gear box and transmitting the driving force of the motor to the driven part;
A motor drive mechanism comprising:
An eigenvalue lowering unit that is attached to the motor and / or the attachment member and lowers a value of a primary natural frequency of a vibration system including the motor and the attachment member;
The motor drive mechanism characterized by this. 請求項１に記載のモータ駆動機構において、
前記取付部材は、前記モータの出力軸の軸受け部とは反対側の軸先端部を回転可能に支持する支持部を有すること、
を特徴とするモータ駆動機構。 The motor drive mechanism according to claim 1,
The mounting member has a support portion that rotatably supports a shaft tip portion opposite to a bearing portion of the output shaft of the motor;
The motor drive mechanism characterized by this. 請求項１又は請求項２に記載のモータ駆動機構において、
前記固有値低下手段は、前記モータ及び／又前記取付部材に貼付される重量成分のみが影響する重り部材であること、
を特徴とするモータ駆動機構。 In the motor drive mechanism according to claim 1 or 2,
The eigenvalue lowering means is a weight member affected only by a weight component attached to the motor and / or the mounting member;
The motor drive mechanism characterized by this. 請求項１から請求項３までのいずれか１項に記載のモータ駆動機構において、
前記固有値低下手段は、前記モータ及び／又前記取付部材に貼付される低弾性高比重材の重り部材であること、
を特徴とするモータ駆動機構。 In the motor drive mechanism according to any one of claims 1 to 3,
The eigenvalue lowering means is a weight member of a low elastic high specific gravity material affixed to the motor and / or the mounting member;
The motor drive mechanism characterized by this. 請求項１から請求項４までのいずれか１項に記載のモータ駆動機構において、
前記重り部材は、弾性を有して取り付けられること、
を特徴とするモータ駆動機構。 In the motor drive mechanism according to any one of claims 1 to 4,
The weight member is attached with elasticity;
The motor drive mechanism characterized by this. 請求項１から請求項５までのいずれか１項に記載のモータ駆動機構において、
前記重り部材は、その重量が前記モータと前記取付部材の合計重量に対して、１０〜２０％となること、
を特徴とするモータ駆動機構。 In the motor drive mechanism according to any one of claims 1 to 5,
The weight member has a weight of 10 to 20% with respect to the total weight of the motor and the mounting member;
The motor drive mechanism characterized by this. 請求項１から請求項６までのいずれか１項に記載のモータ駆動機構において、
前記重り部材は、その密度が４〜１１を有する成型材であること、
を特徴とするモータ駆動機構。 In the motor drive mechanism according to any one of claims 1 to 6,
The weight member is a molding material having a density of 4 to 11;
The motor drive mechanism characterized by this. 請求項１から請求項７までのいずれか１項に記載のモータ駆動機構において、
前記重り部材は、その弾性率が数百ＭＰａ程度の柔軟性を有する成型材であること、
を特徴とするモータ駆動機構。 In the motor drive mechanism according to any one of claims 1 to 7,
The weight member is a molding material whose flexibility is about several hundred MPa,
The motor drive mechanism characterized by this. 請求項１又は請求項２に記載のモータ駆動機構において、
前記固有値低下手段は、前記取付部材の曲げ部に形成された曲げ剛性を低下させる切欠き部であること、
を特徴とするモータ駆動機構。

In the motor drive mechanism according to claim 1 or 2,
The eigenvalue lowering means is a notch for lowering the bending rigidity formed in the bent portion of the mounting member;
The motor drive mechanism characterized by this.

JP2004276571A 2004-09-24 2004-09-24 Motor driving mechanism Pending JP2006094625A (en)

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CN102332773A (en) * 2010-06-14 2012-01-25 罗伯特·博世有限公司 Gear box drive unit for adjustment device of e.g. window lifter propulsion in motor car, has attachment member frictionally connecting gear box with gear housing, where attachment member is designed as separate component from gear housing
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