JP7205238B2 - brush holder device - Google Patents

brush holder device Download PDF

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JP7205238B2
JP7205238B2 JP2019003237A JP2019003237A JP7205238B2 JP 7205238 B2 JP7205238 B2 JP 7205238B2 JP 2019003237 A JP2019003237 A JP 2019003237A JP 2019003237 A JP2019003237 A JP 2019003237A JP 7205238 B2 JP7205238 B2 JP 7205238B2
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coil
brush holder
connection
core shaft
shaft member
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JP2020114098A (en
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和陽 松ヶ谷
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Denso Corp
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Denso Corp
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Description

本発明は、チョークコイルを備えたブラシホルダ装置に関するものである。 The present invention relates to a brush holder device having a choke coil.

従来、直流モータのブラシホルダ装置には樹脂製のブラシホルダにチョークコイルが保持されてなるものがある（例えば、特許文献１参照）。このようなチョークコイルは、フェライトよりなる棒状のコア軸材と、該コア軸材に巻き付けられつつ外嵌されるように配置されるコイル部と該コイル部の端部から延出する接続部とを有するコイル部材とを備え、コイル部の内面における軸方向全体がコア軸材に接着されたものが一般的である。そして、コイル部材における接続部は、例えばブラシホルダに保持されたターミナルに接続される。 2. Description of the Related Art Conventionally, there is a DC motor brush holder device in which a choke coil is held in a resin brush holder (see, for example, Patent Document 1). Such a choke coil includes a rod-shaped core shaft made of ferrite, a coil portion wound around the core shaft and fitted on the core, and a connecting portion extending from an end of the coil. and the inner surface of the coil portion is generally adhered to the core shaft member along the entire axial direction. A connection portion of the coil member is connected to a terminal held by, for example, a brush holder.

特開２０１５－９１１５９号公報JP 2015-91159 A

しかしながら、上記のようなチョークコイルでは、例えば、ターミナルが振動することなどによって接続部に外力が加わると、コイル部の軸方向全体がコア軸材に接着されていることから、コイル部と接続部との境目や、接続部とターミナルとの境目等に局部的に応力が集中する虞があった。よって、ターミナルが繰り返し振動して接続部に外力が繰り返して加わった場合等、コイル部と接続部の境目が切断されたり、接続部とターミナルとの境目の溶接が剥がれるといった虞があった。 However, in the choke coil as described above, when an external force is applied to the connecting portion due to, for example, the terminal vibrating, the coil portion and the connecting portion are not connected to each other because the entire axial direction of the coil portion is adhered to the core shaft material. There is a possibility that the stress may be locally concentrated on the boundary between the terminals and the boundary between the connecting portion and the terminal. Therefore, when the terminal is repeatedly vibrated and an external force is repeatedly applied to the connecting portion, there is a risk that the boundary between the coil portion and the connecting portion may be cut, or the weld between the connecting portion and the terminal may be peeled off.

本発明は上記問題点を解消するためになされたものであって、その目的は、接続部に外力が加わった際の局部的な応力の集中を抑制できるチョークコイルを備えたブラシホルダ装置を提供することにある。 SUMMARY OF THE INVENTION It is an object of the present invention to provide a brush holder device having a choke coil capable of suppressing local concentration of stress when an external force is applied to a connecting portion. to provide.

上記課題を解決するブラシホルダ装置は、棒状のコア軸材（３１）と、前記コア軸材に巻き付けられつつ外嵌されるように配置されるコイル部（３２ａ）と該コイル部の端部から延出する接続部（３２ｂ）とを有し前記コイル部の内面が前記コア軸材に接着されたコイル部材（３２）とを備えたチョークコイル（２６）と、前記チョークコイルを保持するブラシホルダ（２２）と、前記ブラシホルダに保持され、前記チョークコイルの接続部に接続されたターミナル（３３）とを備えたブラシホルダ装置であって、前記接続部が延出される前記コイル部の端部を含む前記コイル部の軸方向一端側端部には前記コア軸材と接着されない非接着部（３２ｄ）が設けられており、前記ブラシホルダには、前記コイル部の軸方向一端側端部の前記非接着部よりも該コイル部の軸方向他端側の該コイル部の外周であって、且つ前記コイル部のうち前記コア軸材と接着されている接着部の外周を押圧する可撓性を有する押圧片が設けられている。 A brush holder device that solves the above problems comprises a rod-shaped core shaft member (31), a coil portion (32a) that is wound around the core shaft member and is fitted onto the outside of the coil portion (32a), and an end of the coil portion. a choke coil (26) comprising a coil member (32) having an extending connection portion (32b) and having an inner surface of the coil portion adhered to the core shaft member; and a brush holder holding the choke coil. (22), and a terminal (33) held by the brush holder and connected to a connection portion of the choke coil, the end portion of the coil portion from which the connection portion extends. A non-bonded portion (32d) that is not adhered to the core shaft member is provided at one axial end of the coil portion including the Flexibility that presses the outer periphery of the coil portion on the other axial end side of the coil portion relative to the non-bonded portion and the outer periphery of the bonded portion of the coil portion that is bonded to the core shaft member. is provided .

同構成によれば、コイル部の軸方向端部にはコア軸材と接着されない非接着部が設けられるため、例えば、接続部に接続されるターミナル等から接続部に外力が加わった際には非接着部が撓むことが許容される。よって、接続部に外力が加わった際の局部的な応力の集中を抑制することができる。その結果、例えば、接続部に外力が繰り返して加わった際でもコイル部材の破損等を低減することができる。 According to this configuration, since the non-bonded portion that is not bonded to the core shaft member is provided at the axial end of the coil portion, for example, when an external force is applied to the connection portion from a terminal or the like connected to the connection portion, The non-bonded portion is allowed to flex. Therefore, it is possible to suppress local concentration of stress when an external force is applied to the connecting portion. As a result, for example, damage to the coil member can be reduced even when an external force is repeatedly applied to the connecting portion.

一実施形態における直流モータの正面図。1 is a front view of a DC motor in one embodiment; FIG. 一実施形態におけるブラシホルダ装置の一部断面模式図。1 is a schematic partial cross-sectional view of a brush holder device according to one embodiment; FIG. 一実施形態におけるチョークコイルの平面図。1 is a plan view of a choke coil in one embodiment; FIG. 別例におけるチョークコイルの平面図。The top view of the choke coil in another example.

以下、ブラシホルダ装置を備えた直流モータの一実施形態を図１～図３に従って説明する。
図１に示すように、本実施形態の直流モータ１は、回転子２の回転軸３を回転駆動するモータ本体４と、回転軸３の回転を減速する減速部５とを備えている。 An embodiment of a DC motor having a brush holder device will be described below with reference to FIGS. 1 to 3. FIG.
As shown in FIG. 1, the DC motor 1 of this embodiment includes a motor main body 4 that drives a rotary shaft 3 of a rotor 2 to rotate, and a reduction section 5 that reduces the rotation of the rotary shaft 3 .

モータ本体４のモータケースであるヨークハウジング６は、導電性の金属材料よりなり、有底筒状に形成され、その内周面には永久磁石７が固定されている。ヨークハウジング６の開口部にはフランジ６ａが形成され、そのフランジ６ａは、減速部５のギヤハウジング８の固定部８ａとボルト９にて固定されている。 A yoke housing 6, which is a motor case of the motor main body 4, is made of a conductive metal material and formed in a cylindrical shape with a bottom. A flange 6 a is formed at the opening of the yoke housing 6 , and the flange 6 a is fixed to the fixing portion 8 a of the gear housing 8 of the reduction section 5 with bolts 9 .

減速部５のギヤハウジング８は、合成樹脂材料よりなり、前記ヨークハウジング６と固定される前記固定部８ａと、固定部８ａから前記回転軸３の軸線方向に延びたウォーム収容部８ｂと、該ウォーム収容部８ｂの側方（図１において右方）に形成されたホイール収容部８ｃとを有する。そして、ウォーム収容部８ｂには、前記回転軸３の先端部とクラッチ１１を介して連結されるウォーム軸１２が収容され、ホイール収容部８ｃには、ウォーム軸１２と噛合されるウォームホイール１３が収容されている。ウォームホイール１３の軸中心には出力軸１４が設けられ、該出力軸１４は、外部負荷と駆動連結されることになる。 The gear housing 8 of the reduction unit 5 is made of a synthetic resin material, and includes the fixed portion 8a fixed to the yoke housing 6, a worm housing portion 8b extending from the fixed portion 8a in the axial direction of the rotating shaft 3, and the gear housing 8b. A wheel housing portion 8c is formed on the side of the worm housing portion 8b (on the right side in FIG. 1). The worm housing portion 8b houses a worm shaft 12 connected to the tip of the rotating shaft 3 via a clutch 11, and the wheel housing portion 8c houses a worm wheel 13 that meshes with the worm shaft 12. Contained. An output shaft 14 is provided at the center of the worm wheel 13, and the output shaft 14 is drivingly connected to an external load.

また、直流モータ１は、ヨークハウジング６とギヤハウジング８とに亘って保持されたブラシホルダ装置２１を備えている。
ブラシホルダ装置２１は、樹脂製のブラシホルダ２２に、前記回転子２の整流子２３に摺接される給電用ブラシ２４や、該給電用ブラシ２４と外部接続端子２５との間に電気的に接続されるチョークコイル２６等が保持されてなる。 The DC motor 1 also includes a brush holder device 21 held across the yoke housing 6 and the gear housing 8 .
The brush holder device 21 includes a brush holder 22 made of resin, a power supply brush 24 that is in sliding contact with the commutator 23 of the rotor 2 , and an electrical connection between the power supply brush 24 and an external connection terminal 25 . The connected choke coil 26 and the like are held.

図２に示すように、チョークコイル２６は、フェライトよりなる棒状のコア軸材３１と導線よりなるコイル部材３２とを備える。コア軸材３１は、略円柱状に形成されている。コイル部材３２は、コア軸材３１に巻き付けられつつ外嵌されるように配置されるコイル部３２ａと該コイル部３２ａの両端部から延出する接続部３２ｂ，３２ｃとを有する。コイル部材３２はコイル部３２ａの内面がコア軸材３１に接着されている。ただし、コイル部３２ａの軸方向端部にはコア軸材３１と接着されない非接着部３２ｄが設けられている。本実施形態では、コイル部３２ａの一端から約２巻き分の範囲Ｈが非接着部３２ｄとされている。 As shown in FIG. 2, the choke coil 26 includes a bar-shaped core shaft member 31 made of ferrite and a coil member 32 made of a conductive wire. The core shaft member 31 is formed in a substantially columnar shape. The coil member 32 has a coil portion 32a arranged so as to be fitted around the core shaft member 31 and connection portions 32b and 32c extending from both ends of the coil portion 32a. The inner surface of the coil portion 32 a of the coil member 32 is adhered to the core shaft member 31 . However, a non-bonded portion 32d that is not bonded to the core shaft member 31 is provided at the axial end of the coil portion 32a. In this embodiment, the non-bonded portion 32d is a range H corresponding to about two turns from one end of the coil portion 32a.

そして、チョークコイル２６は、ブラシホルダ２２の底部２２ａから立設された側壁２２ｂにコイル部３２ａの外周が当接されつつ、ブラシホルダ２２の底部２２ａから斜めに立設された押圧片２２ｃにコイル部３２ａの外周が押圧されて保持されている。すなわち、押圧片２２ｃは、その先端部が側壁２２ｂに対する距離が変わるように可撓性を有し、外力を受けていない、すなわち撓ませていない状態の押圧片２２ｃの先端部と側壁２２ｂとの距離はチョークコイル２６の外径よりも小さく設定されており、側壁２２ｂと押圧片２２ｃの先端部との間にチョークコイル２６の外周面が挟持されている。そして、一対の接続部３２ｂ，３２ｃはそれぞれブラシホルダ２２に保持されたターミナル３３に接続されている。 The choke coil 26 is connected to a pressing piece 22c obliquely erected from the bottom 22a of the brush holder 22 while the outer periphery of the coil portion 32a is in contact with the side wall 22b erected from the bottom 22a of the brush holder 22. The outer periphery of the portion 32a is pressed and held. That is, the pressing piece 22c has flexibility such that the distance from the side wall 22b changes at the tip thereof, and the tip of the pressing piece 22c and the side wall 22b in a state of not receiving an external force, that is, in a non-flexed state The distance is set smaller than the outer diameter of the choke coil 26, and the outer peripheral surface of the choke coil 26 is sandwiched between the side wall 22b and the tip of the pressing piece 22c. A pair of connecting portions 32b and 32c are connected to terminals 33 held by the brush holder 22, respectively.

ここで、コイル部３２ａの一端側であって上方側の接続部３２ｂは、ブラシホルダ２２の側壁２２ｂの上部に保持されたターミナル３３に接続されている。
詳しくは、ターミナル３３は、ブラシホルダ２２の側壁２２ｂに埋設されて保持される埋設部３３ａと、埋設部３３ａの上部から側方に延びる側延部３３ｂとを有する。そして、側延部３３ｂの一部は、接続部３２ｂが溶接される接続平坦面３３ｃとされている。 Here, one end side of the coil portion 32a and the upper connection portion 32b are connected to the terminal 33 held on the upper portion of the side wall 22b of the brush holder 22. As shown in FIG.
Specifically, the terminal 33 has an embedded portion 33a embedded and held in the side wall 22b of the brush holder 22, and a side extending portion 33b extending laterally from the upper portion of the embedded portion 33a. A portion of the lateral extension portion 33b serves as a connection flat surface 33c to which the connection portion 32b is welded.

また、上方の接続部３２ｂは、前記コイル部３２ａの端部から径方向外側に延びる外延部３２ｅと、該外延部３２ｅの先端から上方に延びる上延部３２ｆとを有する。そして、上延部３２ｆの先端側における外周面の一部が前記接続平坦面３３ｃに接触されつつ溶接されている。 The upper connection portion 32b has an extension portion 32e extending radially outward from the end portion of the coil portion 32a, and an upward extension portion 32f extending upward from the tip of the extension portion 32e. A portion of the outer peripheral surface of the upwardly extending portion 32f on the tip side is welded while being in contact with the connection flat surface 33c.

図３に示すように、前記接続部３２ｂが接続平坦面３３ｃに接触して溶接される方向（図３中、上方向）は、非接着部３２ｄがコア軸材３１から弛む方向（言い換えると、巻き付きが解ける方向）に撓んで接続部３２ｂが移動し易い方向と対応するように設定されている。具体的には、チョークコイル２６の軸方向から見て（図３参照）、接続平坦面３３ｃに沿った線Ｌは、前記コイル部３２ａを横切るように配置され、接続部３２ｂが接続平坦面３３ｃに接触して溶接される方向（図３中、上方向）は、接続部３２ｂからコイル部３２ａが曲がる側（図３中、上側）に設定されている。すなわち、接続部３２ｂは、非接着部３２ｄがコア軸材３１から弛む方向（言い換えると、巻き付きが解ける方向）に対応して移動し易く、図３中では、上方向には移動し易い。逆に、接続部３２ｂは、非接着部３２ｄがコア軸材３１に巻き付く方向に対応して移動し難く、図３中では、下方向には移動し難い。そこで、接続部３２ｂが接続平坦面３３ｃに接触して溶接される方向を、接続部３２ｂが移動し易い方向と対応させている。なお、接続部３２ｂは、非接着部３２ｄがコア軸材３１に巻き付く方向に対応して図３中では下方向に移動し難いものの、非接着部３２ｄが設けられていない場合よりは僅かに移動し易い。 As shown in FIG. 3, the direction in which the connection portion 32b contacts and is welded to the connection flat surface 33c (upward direction in FIG. 3) is the direction in which the non-bonded portion 32d loosens from the core shaft member 31 (in other words, It is set to correspond to the direction in which the connection portion 32b is easily moved by bending in the direction in which the winding is released. Specifically, when viewed from the axial direction of the choke coil 26 (see FIG. 3), the line L along the connection flat surface 33c is arranged to traverse the coil portion 32a, and the connection portion 32b is located on the connection flat surface 33c. The direction (upward direction in FIG. 3) in which the coil portion 32a is bent from the connection portion 32b (upper side in FIG. 3) is set to be in contact with and welded to. That is, the connecting portion 32b is easily moved in the direction in which the non-bonded portion 32d loosens from the core shaft member 31 (in other words, in the direction in which the winding is unwound), and is easily moved upward in FIG. Conversely, the connecting portion 32b is difficult to move in the direction in which the non-bonded portion 32d winds around the core shaft member 31, and is difficult to move downward in FIG. Therefore, the direction in which the connection portion 32b contacts and is welded to the connection flat surface 33c is made to correspond to the direction in which the connection portion 32b can easily move. Although it is difficult for the connection portion 32b to move downward in FIG. Easy to move.

次に、上記のように構成された直流モータ１の作用について説明する。
外部電源から直流モータ１の外部接続端子２５に電源が供給されると、チョークコイル２６及び給電用ブラシ２４を介して整流子２３、更には回転子２の巻線に電源が供給され、回転子２が回転駆動される。すると、回転軸３と一体的にウォーム軸１２が回転し、ウォーム軸１２の回転に伴ってウォームホイール１３及び出力軸１４が回転し、該出力軸１４から外部負荷に動力が伝達される。このとき、給電用ブラシ２４が整流子２３に摺接することで発生する電気ノイズはチョークコイル２６により低減される。 Next, operation of the DC motor 1 configured as described above will be described.
When power is supplied from an external power supply to the external connection terminals 25 of the DC motor 1, power is supplied to the commutator 23 and further to the windings of the rotor 2 via the choke coils 26 and the power supply brushes 24. 2 is rotationally driven. Then, the worm shaft 12 rotates integrally with the rotary shaft 3, the worm wheel 13 and the output shaft 14 rotate with the rotation of the worm shaft 12, and power is transmitted from the output shaft 14 to the external load. At this time, the choke coil 26 reduces electrical noise generated by the sliding contact of the power supply brush 24 with the commutator 23 .

そして、このような駆動時等では、ターミナル３３が振動して接続部３２ｂに外力が加わることがあるが、コイル部３２ａには非接着部３２ｄが設けられ、非接着部３２ｄが撓むことが許容されるため、接続部３２ｂに外力が加わった際の局部的な応力の集中が抑制される。 During such driving, the terminal 33 may vibrate and external force may be applied to the connecting portion 32b. Since it is allowed, local concentration of stress when an external force is applied to the connecting portion 32b is suppressed.

次に、上記実施形態の効果を以下に記載する。
（１）コイル部３２ａの軸方向端部にはコア軸材３１と接着されない非接着部３２ｄが設けられるため、例えば、接続部３２ｂに接続されるターミナル３３等から接続部３２ｂに外力が加わった際には非接着部３２ｄが撓むことが許容される。よって、接続部３２ｂに外力が加わった際にコイル部３２ａと接続部３２ｂとの境目や接続部３２ｂとターミナル３３との境目等に局部的に応力が集中することを抑制することができる。 Next, the effects of the above embodiment will be described below.
(1) Since the non-bonded portion 32d that is not bonded to the core shaft member 31 is provided at the axial end of the coil portion 32a, external force is applied to the connecting portion 32b from, for example, the terminal 33 connected to the connecting portion 32b. In some cases, the non-bonded portion 32d is allowed to bend. Therefore, when an external force is applied to the connection portion 32b, it is possible to suppress local concentration of stress on the boundary between the coil portion 32a and the connection portion 32b, the boundary between the connection portion 32b and the terminal 33, and the like.

（２）コイル部材３２の接続部３２ｂは、ターミナル３３の接続平坦面３３ｃに溶接されて接続されるため、例えばターミナルを折り曲げつつ接続する場合に比べて、容易に接続部３２ｂをターミナル３３に接続することができる。そして、このような構成では接続部３２ｂとターミナル３３との境目に強い応力が加わると溶接が剥がれてしまう虞があるが、前記非接着部３２ｄの作用によって応力の集中を抑制できるので溶接の剥がれを抑えることができる。 (2) Since the connection portion 32b of the coil member 32 is welded and connected to the connection flat surface 33c of the terminal 33, the connection portion 32b can be easily connected to the terminal 33 compared to the case where the terminal is connected while being bent. can do. In such a configuration, if a strong stress is applied to the boundary between the connection portion 32b and the terminal 33, there is a risk that the weld will peel off. can be suppressed.

（３）接続部３２ｂが接続平坦面３３ｃに接触して溶接される方向は、非接着部３２ｄがコア軸材３１から弛む方向に撓んで接続部３２ｂが移動し易い方向と対応するように設定されるため、ターミナル３３の接続平坦面３３ｃが振動して接続部３２ｂから離間する方向に移動した場合でも接続部３２ｂが追従して移動し易く溶接が剥がれ難い。 (3) The direction in which the connection portion 32b contacts and is welded to the connection flat surface 33c is set so as to correspond to the direction in which the non-bonded portion 32d bends in the direction in which it loosens from the core shaft member 31 and the connection portion 32b easily moves. Therefore, even when the connection flat surface 33c of the terminal 33 vibrates and moves away from the connection portion 32b, the connection portion 32b easily follows and moves, and the weld is less likely to come off.

本実施形態は、以下のように変更して実施することができる。本実施形態及び以下の変更例は、技術的に矛盾しない範囲で互いに組み合わせて実施することができる。
・上記実施形態では、接続部３２ｂが接続平坦面３３ｃに接触して溶接される方向は、非接着部３２ｄがコア軸材３１から弛む方向に撓んで接続部３２ｂが移動し易い方向と対応するように設定されるとしたが、これに限定されず、他の方向に溶接してもよい。 This embodiment can be implemented with the following modifications. This embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.
In the above embodiment, the direction in which the connecting portion 32b contacts and is welded to the connecting flat surface 33c corresponds to the direction in which the non-bonded portion 32d bends in the direction in which the core shaft member 31 loosens and the connecting portion 32b easily moves. However, it is not limited to this, and welding may be performed in other directions.

例えば、図４に示すように、上記実施形態とは反対側に接続部３２ｂを溶接してもよい。具体的には、チョークコイル２６の軸方向から見て、接続平坦面３３ｃに沿った線Ｌは、コイル部３２ａを横切るように配置され、接続部３２ｂが接続平坦面３３ｃに接触して溶接される方向（図４中、下方向）は、接続部３２ｂからコイル部３２ａが曲がる側（図４中、上側）の反対側に設定してもよい。なお、このようにすると、ターミナル３３の接続平坦面３３ｃが振動して接続部３２ｂから離間する方向（図４中、下方向）に移動した場合、接続部３２ｂは上記実施形態よりも追従して移動し難いが、非接着部３２ｄが設けられていない場合よりは移動し易く溶接が剥がれ難い。 For example, as shown in FIG. 4, the connecting portion 32b may be welded on the opposite side of the above embodiment. Specifically, when viewed from the axial direction of the choke coil 26, the line L along the connection flat surface 33c is arranged to cross the coil portion 32a, and the connection portion 32b is in contact with and welded to the connection flat surface 33c. The direction (the downward direction in FIG. 4) may be set on the side opposite to the side where the coil portion 32a bends from the connection portion 32b (the upper side in FIG. 4). In this way, when the connection flat surface 33c of the terminal 33 vibrates and moves away from the connection portion 32b (downward in FIG. 4), the connection portion 32b follows the connection more than in the above embodiment. Although it is difficult to move, it is easier to move than when the non-bonded portion 32d is not provided, and the weld is less likely to come off.

また、上記実施形態（図３参照）及び別例（図４参照）では、チョークコイル２６の軸方向から見て、接続平坦面３３ｃに沿った線Ｌは、コイル部３２ａを横切るように配置されるとしたが、これに限定されず、コイル部３２ａを横切らないように配置して溶接してもよい。 In the above embodiment (see FIG. 3) and another example (see FIG. 4), the line L along the connection flat surface 33c is arranged to cross the coil portion 32a when viewed from the axial direction of the choke coil 26. However, it is not limited to this, and may be arranged and welded so as not to cross the coil portion 32a.

・上記実施形態では、コイル部材３２の接続部３２ｂは、ターミナル３３の接続平坦面３３ｃに溶接されて接続されるとしたが、これに限定されず、例えばターミナルを折り曲げつつかしめて接続してもよい。このようにしても、コイル部３２ａと接続部３２ｂとの境目や接続部３２ｂとターミナルとの境目等に局部的に応力が集中することを抑制することができる。 In the above embodiment, the connection portion 32b of the coil member 32 is welded to the connection flat surface 33c of the terminal 33, but the connection is not limited to this. good. Also in this way, it is possible to suppress local concentration of stress on the boundary between the coil portion 32a and the connection portion 32b, the boundary between the connection portion 32b and the terminal, and the like.

・上記実施形態では、コイル部３２ａの一端から約２巻き分の範囲Ｈが非接着部３２ｄとされるとしたが、これに限定されず、非接着部３２ｄの範囲Ｈはコイル部３２ａの一端から１巻き分や３巻き分等に変更してもよい。なお、非接着部３２ｄの範囲Ｈは、接続部３２ｂの移動し易さを考慮すると、コイル部３２ａの一端から１／２巻き以上が好ましい。 In the above-described embodiment, the non-bonded portion 32d is the range H corresponding to about two turns from one end of the coil portion 32a. It may be changed from 1 roll, 3 rolls, or the like. Considering the ease of movement of the connecting portion 32b, the range H of the non-bonded portion 32d is preferably 1/2 turn or more from one end of the coil portion 32a.

・上記実施形態では、非接着部３２ｄがコイル部３２ａの軸方向の一端部にのみ設けられた構成としたが、これに限定されず、コイル部３２ａの軸方向両端部に設けてもよい。なお、もちろん、非接着部３２ｄは、接続部が外力を受け易い側、すなわち接続されるターミナルが振動し易い側に設けることが好ましい。 In the above-described embodiment, the non-bonded portion 32d is provided only at one axial end of the coil portion 32a. Of course, it is preferable to provide the non-bonded portion 32d on the side where the connecting portion is likely to receive external force, that is, on the side where the terminal to be connected is likely to vibrate.

・上記実施形態では、チョークコイル２６を備えたブラシホルダ装置２１に具体化したが、これに限定されず、チョークコイル２６を他の装置に設けて実施してもよい。 - In the above-described embodiment, the brush holder device 21 having the choke coil 26 is embodied.

２１…ブラシホルダ装置、２２…ブラシホルダ、２６…チョークコイル、３１…コア軸材、３２…コイル部材、３２ａ…コイル部、３２ｂ…接続部、３２ｄ…非接着部、３３…ターミナル、３３ｃ…接続平坦面、Ｌ…接続平坦面に沿った線。 21 Brush holder device 22 Brush holder 26 Choke coil 31 Core shaft member 32 Coil member 32a Coil portion 32b Connection portion 32d Non-bonded portion 33 Terminal 33c Connection Planar plane, L . . . line along the connecting plane.

Claims (4)

棒状のコア軸材（３１）と、前記コア軸材に巻き付けられつつ外嵌されるように配置されるコイル部（３２ａ）と該コイル部の端部から延出する接続部（３２ｂ）とを有し前記コイル部の内面が前記コア軸材に接着されたコイル部材（３２）とを備えたチョークコイル（２６）と、
前記チョークコイルを保持するブラシホルダ（２２）と、
前記ブラシホルダに保持され、前記チョークコイルの接続部に接続されたターミナル（３３）と
を備えたブラシホルダ装置であって、
前記接続部が延出される前記コイル部の端部を含む前記コイル部の軸方向一端側端部には前記コア軸材と接着されない非接着部（３２ｄ）が設けられており、
前記ブラシホルダには、前記コイル部の軸方向一端側端部の前記非接着部よりも該コイル部の軸方向他端側の該コイル部の外周であって、且つ前記コイル部のうち前記コア軸材と接着されている接着部の外周を押圧する可撓性を有する押圧片が設けられており、
前記ブラシホルダには側壁が立設されており、
前記押圧片は、前記ブラシホルダから前記チョークコイル側に向かって斜めに立設され、撓ませていない状態の前記押圧片の先端部と前記側壁との距離が前記チョークコイルの外径よりも小さく設定されており、
前記チョークコイルは、前記側壁に前記コイル部の外周が当接されるとともに前記押圧片に前記コイル部の前記接着部の外周が押圧された状態で、前記側壁と前記押圧片の先端部との間に挟持されているブラシホルダ装置。 A rod-shaped core shaft member (31), a coil portion (32a) arranged so as to be fitted around the core shaft member while being wound around the core shaft member, and a connecting portion (32b) extending from an end of the coil portion. a choke coil (26) comprising a coil member (32) having the inner surface of the coil portion adhered to the core shaft member;
a brush holder (22) holding the choke coil;
a terminal (33) held by the brush holder and connected to a connection portion of the choke coil,
A non-adhesive portion (32d) that is not adhered to the core shaft member is provided at one axial end of the coil portion including the end of the coil portion from which the connecting portion extends,
In the brush holder, an outer circumference of the coil portion on the other axial end side of the coil portion relative to the non-bonded portion at one axial end of the coil portion, and the core of the coil portion A flexible pressing piece is provided for pressing the outer periphery of the bonded portion bonded to the shaft ,
A side wall is erected on the brush holder,
The pressing piece is erected obliquely from the brush holder toward the choke coil, and the distance between the tip of the pressing piece in an unbent state and the side wall is smaller than the outer diameter of the choke coil. is set and
In the choke coil, the outer periphery of the coil portion is in contact with the side wall and the outer periphery of the bonding portion of the coil portion is pressed by the pressing piece, and the side wall and the tip portion of the pressing piece are pressed against each other. A brush holder device sandwiched between . 前記コイル部材の前記接続部は、前記ターミナルの接続平坦面（３３ｃ）に溶接されて接続された請求項１に記載のブラシホルダ装置。 2. The brush holder device according to claim 1 , wherein said connection portion of said coil member is welded and connected to a connection flat surface (33c) of said terminal. 前記接続部が前記接続平坦面に接触して溶接される方向は、前記非接着部がコア軸材から弛む方向に撓んで前記接続部が移動し易い方向と対応するように設定された請求項２に記載のブラシホルダ装置。 A direction in which the connection portion contacts and is welded to the connection flat surface is set so as to correspond to a direction in which the non-bonded portion bends in a direction in which the non-bonded portion loosens from the core shaft member and the connection portion is easily moved. 3. The brush holder device according to 2. 前記チョークコイルの軸方向から見て、前記接続平坦面に沿った線（Ｌ）は、コイル部を横切るように配置され、前記接続部が前記接続平坦面に接触して溶接される方向は、前記接続部から前記コイル部が曲がる側に設定された請求項３に記載のブラシホルダ装置。 When viewed from the axial direction of the choke coil, the line (L) along the connection flat surface is arranged to cross the coil portion, and the direction in which the connection portion contacts and is welded to the connection flat surface is 4. The brush holder device according to claim 3 , wherein the coil portion is set on a side where the coil portion is bent from the connection portion.
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JP2015043685A (en) 2013-07-26 2015-03-05 アスモ株式会社 Motor
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JP2000060076A (en) 1998-06-05 2000-02-25 Asmo Co Ltd Electrical noise preventing device for dc motor
JP2002165413A (en) 2000-09-13 2002-06-07 Asmo Co Ltd Motor
JP2015043685A (en) 2013-07-26 2015-03-05 アスモ株式会社 Motor
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