JP5266768B2 - Circuit board fixing structure of motor unit and motor unit having this circuit board fixing structure - Google Patents

Circuit board fixing structure of motor unit and motor unit having this circuit board fixing structure Download PDF

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JP5266768B2
JP5266768B2 JP2008010848A JP2008010848A JP5266768B2 JP 5266768 B2 JP5266768 B2 JP 5266768B2 JP 2008010848 A JP2008010848 A JP 2008010848A JP 2008010848 A JP2008010848 A JP 2008010848A JP 5266768 B2 JP5266768 B2 JP 5266768B2
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circuit board
casing
cover
elastic member
motor unit
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JP2009177869A5 (en
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隆敏 阪田
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JTEKT Corp
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JTEKT Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

Abstract

<P>PROBLEM TO BE SOLVED: To provide a circuit board fixing structure for a motor unit, which can surely and easily fixing a circuit board without using a screw for fixing the circuit board. <P>SOLUTION: The circuit board fixing structure for a motor unit U includes an electric motor M and the circuit board C for controlling the electric motor M. Further, a board accommodation part 1d for accommodating the circuit board C is provided within a casing 1 covering the electric motor M, wherein the circuit board C accommodated in the board accommodation part 1d is covered with a cover 10. Besides, the circuit board C is held between the casing 1 and the cover 10, and elastic members 11, 12 provided between the casing 1, cover 10 and circuit board C bite into the through-holes C1 formed in the circuit board C, causing the circuit board C to be fixed relative to the casing 1. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

本発明は、電動モータと電動モータを制御するための回路基板とを備えたモータユニットの回路基板固定構造に関する。   The present invention relates to a circuit board fixing structure of a motor unit including an electric motor and a circuit board for controlling the electric motor.

近年、電動機の出力により走行する電気自動車や、エンジン及び電動機の出力により走行するハイブリッド車が注目されている。このような電気自動車やハイブリッド車等の自動車において、トランスミッション等への油圧供給を行う電動ポンプの駆動源として、電動モータと電動モータを制御するための回路基板とを備えたモータユニットが使用される。   2. Description of the Related Art In recent years, attention has been drawn to electric vehicles that run by the output of an electric motor and hybrid vehicles that run by the output of an engine and an electric motor. In such automobiles such as electric vehicles and hybrid vehicles, a motor unit including an electric motor and a circuit board for controlling the electric motor is used as a drive source of an electric pump that supplies hydraulic pressure to a transmission or the like. .

このようなモータユニットは、コンパクト化の観点から電動モータと回路基板とを一体的に備えたものであって、例えば、ケーシング内に回路基板を収納するための基板収納部が電動モータを覆うケーシングに設けられており、ケーシング内の基板収納部に収納された回路基板はカバーによって覆われている。   Such a motor unit is integrally provided with an electric motor and a circuit board from the viewpoint of compactness. For example, a casing in which a board storage portion for storing the circuit board in the casing covers the electric motor. The circuit board housed in the board housing section in the casing is covered with a cover.

ところで、上記のようにケーシング内に収納された回路基板は、一般的に、ケーシングの振動することによって回路基板に実装された電子部品等が破損しないように、ケーシングにねじ止めすることにより固定されている。このようにケーシングに対して回路基板をねじ止めにより固定する場合は、回路基板固定用のねじを使用することがコストアップの要因であった。   By the way, the circuit board housed in the casing as described above is generally fixed by screwing the casing so that the electronic components mounted on the circuit board are not damaged by the vibration of the casing. ing. Thus, when fixing a circuit board with respect to a casing by screwing, it was a factor of a cost increase to use the screw for circuit board fixation.

そこで、回路基板固定構造として、回路基板をケーシング（ケース）とカバー（蓋）とで挟持することにより回路基板を固定する構造や、ケーシングに突起を形成するとともに回路基板に貫通孔を形成して、回路基板の貫通孔にケーシングの突起を挿通することにより回路基板を固定する構造が開示されている（例えば、特許文献１参照）。
特開平１０−３０３５９０号公報 Therefore, as a circuit board fixing structure, a circuit board is fixed by sandwiching the circuit board between a casing (case) and a cover (lid), or a projection is formed on the casing and a through hole is formed in the circuit board. A structure for fixing a circuit board by inserting a projection of a casing into a through hole of the circuit board is disclosed (for example, refer to Patent Document 1).
Japanese Patent Laid-Open No. 10-303590

しかしながら、回路基板をケーシングとカバーとで挟持することにより回路基板を固定する構造は、回路基板の基板表面に平行な面方向において回路基板が動く可能性があり、回路基板の固定が不十分であるという問題があった。また、回路基板の貫通孔にケーシングの突起を挿通することにより回路基板を固定する構造は、回路基板の貫通孔に突起を挿通させることが煩雑であるという問題があった。   However, the structure in which the circuit board is fixed by sandwiching the circuit board between the casing and the cover may cause the circuit board to move in a plane direction parallel to the substrate surface of the circuit board, and the circuit board is not sufficiently fixed. There was a problem that there was. Further, the structure in which the circuit board is fixed by inserting the protrusion of the casing into the through hole of the circuit board has a problem that it is complicated to insert the protrusion into the through hole of the circuit board.

本発明は、こうした実情に鑑みてなされたものであり、その目的は、回路基板固定用のねじを用いずに、回路基板を確実かつ容易に固定することができるモータユニットの回路基板固定構造を提供することにある。   The present invention has been made in view of such circumstances, and an object of the present invention is to provide a circuit board fixing structure for a motor unit that can securely and easily fix a circuit board without using a screw for fixing the circuit board. It is to provide.

（１）本手段の一形態は、「モータユニットの回路基板固定構造であって、前記モータユニットは、ケーシング、カバー、電動モータ、回路基板、第１弾性部材、および第２弾性部材を有し、前記電動モータは、前記ケーシングに収納され、前記ケーシングは、基板収納部を有し、前記回路基板は、前記基板収納部に収納され、前記電動モータと電気的に接続され、貫通孔を有し、前記カバーは、前記ケーシングに固定され、前記回路基板を覆い、前記第１弾性部材は、前記ケーシングと前記回路基板との間に配置され、前記貫通孔の開口長さよりも大きい長さを有し、前記第２弾性部材は、前記カバーと前記回路基板との間に配置され、前記貫通孔の開口長さよりも大きい長さを有し、前記回路基板固定構造は、前記回路基板が前記ケーシングと前記カバーとにより挟まれ、前記第１弾性部材が前記貫通孔に食い込み、前記第２弾性部材が前記貫通孔に食い込むことにより、前記回路基板を前記ケーシングに固定しているモータユニットの回路基板固定構造」を含む。  (1) One form of this means is “a circuit board fixing structure of a motor unit, wherein the motor unit has a casing, a cover, an electric motor, a circuit board, a first elastic member, and a second elastic member. The electric motor is housed in the casing, the casing has a board housing portion, the circuit board is housed in the board housing portion, is electrically connected to the electric motor, and has a through hole. The cover is fixed to the casing and covers the circuit board, and the first elastic member is disposed between the casing and the circuit board and has a length larger than the opening length of the through hole. And the second elastic member is disposed between the cover and the circuit board and has a length larger than an opening length of the through hole. The circuit board fixing structure includes the circuit board Casey A circuit of a motor unit that is sandwiched between the cover and the cover, the first elastic member bites into the through hole, and the second elastic member bites into the through hole, thereby fixing the circuit board to the casing. Substrate fixing structure ”is included.
（２）本手段の一形態は、「上記回路基板固定構造を有するモータユニット」を含む。  (2) One form of this means includes “the motor unit having the circuit board fixing structure”.

上記回路基板固定構造によれば、ケーシングとカバーとによって回路基板が挟まれるともに、ケーシング及びカバーの少なくとも一方と回路基板との間に設けられた弾性部材が、回路基板に形成された貫通孔に食い込むことにより、ケーシングに対して回路基板が固定されている。このため、回路基板を挟むケーシング及びカバーによって、回路基板の基板表面に垂直な方向における回路基板の移動を規制するとともに、回路基板の貫通孔に食い込んだ弾性部材によって、回路基板の基板表面に平行な面方向における回路基板の移動を規制して、回路基板固定用のねじを用いずに、回路基板を確実に固定することができる。また、回路基板の基板表面に平行な面方向における回路基板の移動を規制するための弾性部材は、ケーシングとカバーとによって回路基板を挟む過程において回路基板の貫通孔に食い込ませることができるため、上記従来技術のごとく回路基板の貫通孔にケーシングに形成された突起を挿通することにより回路基板を固定する場合に比し、回路基板を容易に固定することができる。また、回路基板固定用のねじを螺合するためのねじ穴や、回路基板の貫通孔に挿通するための突起をケーシングに形成する必要がないため、上記従来技術のごとくねじ穴や突起をケーシングに形成する場合に比し、ケーシングを容易に加工することができる。
また、上記回路基板固定構造によれば、弾性部材が、ケーシング及びカバーの双方と回路基板との間に設けられているため、回路基板の基板表面の両側から、回路基板の貫通孔に弾性部材を食い込ませることができる。従って、回路基板を一層確実に固定することができる。 According to the circuit board fixing structure , the circuit board is sandwiched between the casing and the cover, and the elastic member provided between at least one of the casing and the cover and the circuit board is formed in the through hole formed in the circuit board. The circuit board is fixed to the casing by biting in. For this reason, the movement of the circuit board in a direction perpendicular to the substrate surface of the circuit board is regulated by the casing and the cover sandwiching the circuit board, and parallel to the board surface of the circuit board by the elastic member that has bite into the through hole of the circuit board. The circuit board can be reliably fixed without restricting the movement of the circuit board in the plane direction and without using the circuit board fixing screw. In addition, the elastic member for regulating the movement of the circuit board in the plane direction parallel to the circuit board surface of the circuit board can bite into the through hole of the circuit board in the process of sandwiching the circuit board by the casing and the cover, The circuit board can be easily fixed as compared with the case where the circuit board is fixed by inserting the protrusion formed on the casing into the through hole of the circuit board as in the conventional technique. Further, since it is not necessary to form a screw hole for screwing a circuit board fixing screw or a protrusion for insertion into the through hole of the circuit board in the casing, the screw hole or the protrusion is formed in the casing as in the above prior art. As compared with the case of forming the casing, the casing can be easily processed.
Further, according to the circuit board fixing structure, since the elastic member is provided between both the casing and the cover and the circuit board, the elastic member is inserted into the through hole of the circuit board from both sides of the circuit board surface. Can be devoured. Therefore, the circuit board can be more reliably fixed.

本発明によれば、回路基板固定用のねじを用いずに、回路基板を確実かつ容易に固定することができ、ケーシングを容易に加工することができる。   According to the present invention, the circuit board can be reliably and easily fixed without using the circuit board fixing screw, and the casing can be easily processed.

以下に本発明に係る実施形態について、図面を参照しながら説明する。本実施形態に係る回路基板固定構造を有するモータユニットＵは、電動モータＭと、電動モータＭを制御するための回路基板Ｃと、電動モータＭによって駆動される歯車ポンプ（ギヤポンプ）Ｐとを一体的に備えたものである。   Embodiments according to the present invention will be described below with reference to the drawings. A motor unit U having a circuit board fixing structure according to the present embodiment includes an electric motor M, a circuit board C for controlling the electric motor M, and a gear pump (gear pump) P driven by the electric motor M. Is prepared for.

より具体的には、有底略円筒状のケーシング１には、電動モータＭを構成するステータ３等が収納されるとともに、ケーシング１の開口端部１Ａには、ポンプハウジング２が固定されている。従って、ポンプハウジング２によりケーシング１が覆われている。   More specifically, the bottomed substantially cylindrical casing 1 houses the stator 3 constituting the electric motor M and the like, and the pump housing 2 is fixed to the opening end 1 </ b> A of the casing 1. . Therefore, the casing 1 is covered with the pump housing 2.

ケーシング１の内周１Ｂには、回転磁界を発生させる略円筒状のステータ３が圧入または接着されて設けられている。このステータ３は、ステータコア３ａとステータコア３ａに巻かれた導線からなる複数のコイル３ｂとから構成されるとともに、コイル３ｂに電気を適宜供給することにより回転磁界を発生させることができる。   A substantially cylindrical stator 3 that generates a rotating magnetic field is press-fitted or bonded to the inner periphery 1 </ b> B of the casing 1. The stator 3 includes a stator core 3a and a plurality of coils 3b made of conductive wires wound around the stator core 3a, and can generate a rotating magnetic field by appropriately supplying electricity to the coil 3b.

また、ケーシング１内の底部１Ｃには、転がり軸受４を収容するための軸受収容部１ａが形成されるとともに、アキシアル方向Ａにおけるポンプハウジング２の端部２Ａにも、ケーシング１と同様に、転がり軸受５を収容するための軸受収容部２ａが形成されている。   A bearing housing 1 a for housing the rolling bearing 4 is formed on the bottom 1 C in the casing 1, and the end 2 A of the pump housing 2 in the axial direction A is also rolled similarly to the casing 1. A bearing housing portion 2a for housing the bearing 5 is formed.

そして、軸受収容部１ａ，２ａに収容された転がり軸受４，５によって、永久磁石６ａと軸部材６ｂとから構成されるロータ６が回転可能に支持されて、ロータ６が環状のステータ３の内側に配設されている。   And the rotor 6 comprised from the permanent magnet 6a and the shaft member 6b is rotatably supported by the rolling bearings 4 and 5 accommodated in the bearing accommodating parts 1a and 2a, and the rotor 6 is inside the annular stator 3. It is arranged.

より具体的には、ロータ６は、回転磁界によってロータ６が回転する駆動力を得るための永久磁石６ａと、円筒状の永久磁石６ａの内周６Ａに挿通されるとともに、接着または圧入により永久磁石６ａに固定された軸部材６ｂとから構成されている。   More specifically, the rotor 6 is inserted into a permanent magnet 6a for obtaining a driving force for rotating the rotor 6 by a rotating magnetic field, and an inner periphery 6A of the cylindrical permanent magnet 6a, and is permanent by adhesion or press-fitting. The shaft member 6b is fixed to the magnet 6a.

永久磁石６ａの外周６Ｂには、ロータ６が回転する方向に沿って磁極が交互に着磁されているため、ステータ３により回転磁界が発生することによって、ロータ６（即ち、永久磁石６ａ及び軸部材６ｂ）が回転する。   Since the magnetic poles are alternately magnetized along the direction in which the rotor 6 rotates on the outer periphery 6B of the permanent magnet 6a, a rotating magnetic field is generated by the stator 3, thereby causing the rotor 6 (that is, the permanent magnet 6a and the shaft). The member 6b) rotates.

以上のように、ケーシング１内には、ステータ３や、ロータ６の永久磁石６ａや、転がり軸受４，５が収納されており、電動モータＭは、ステータ３とロータ６とを備えるとともに、ロータ６を駆動軸として歯車ポンプＰを駆動させる構成となっている。   As described above, the casing 3 houses the stator 3, the permanent magnet 6a of the rotor 6, and the rolling bearings 4 and 5, and the electric motor M includes the stator 3 and the rotor 6, and the rotor. The gear pump P is driven with 6 as a drive shaft.

ポンプハウジング２には、歯車７が収納される歯車収納部２ｂが形成されるとともに、ポンプハウジング２の中央には、歯車収納部２ｂとケーシング１内とを連通する貫通孔２ｃが設けられている。そして、この貫通孔２ｃには、軸部材６ｂが挿通されて、軸部材６ｂが、ケーシング１内から歯車収納部２ｂまで延設されている。   The pump housing 2 is formed with a gear housing portion 2b in which the gear 7 is housed, and a through hole 2c is provided in the center of the pump housing 2 to communicate the gear housing portion 2b with the inside of the casing 1. . The shaft member 6b is inserted into the through hole 2c, and the shaft member 6b extends from the casing 1 to the gear housing portion 2b.

凹陥形状の歯車収納部２ｂには、トロコイド曲線を歯の形状に利用した歯車７であるインナーロータ（外歯歯車）７ａ及びアウターロータ（内歯歯車）７ｂが収納されるとともに、インナーロータ７ａに軸部材６ｂが固定されている。   The recessed gear housing portion 2b houses an inner rotor (external gear) 7a and an outer rotor (internal gear) 7b, which are gears 7 using a trochoidal curve as a tooth shape. The shaft member 6b is fixed.

歯車７が収納された歯車収納部２ｂは、ポンプハウジング２の端面２Ｂを覆うポンププレート８によって封じられており、ポンププレート８には、歯車収納部２ｂに流体であるオイルを吸入するための吸入口（不図示）と、歯車収納部２ｂからオイルを吐出するための吐出口（不図示）とが形成されている。   The gear housing portion 2b in which the gear 7 is housed is sealed by a pump plate 8 that covers the end surface 2B of the pump housing 2, and the pump plate 8 has a suction for sucking fluid oil into the gear housing portion 2b. A port (not shown) and a discharge port (not shown) for discharging oil from the gear housing 2b are formed.

以上のように、ポンププレート８によって封じられたポンプハウジング２内には、歯車７が収納されており、歯車ポンプＰは、ポンプハウジング２と歯車７とポンププレート８とを備えるとともに、ロータ６が回転することによって歯車ポンプＰが駆動される。   As described above, the gear 7 is accommodated in the pump housing 2 sealed by the pump plate 8, and the gear pump P includes the pump housing 2, the gear 7, and the pump plate 8, and the rotor 6 includes the rotor 6. The gear pump P is driven by the rotation.

より具体的には、ロータ６が回転することによってポンプハウジング２内の歯車７が回転して、ポンププレート８の吸入口から吐出口へオイルを輸送するように歯車ポンプＰが駆動される。   More specifically, when the rotor 6 rotates, the gear 7 in the pump housing 2 rotates, and the gear pump P is driven so as to transport oil from the suction port of the pump plate 8 to the discharge port.

また、ケーシング１の底部１Ｃの一部には開口部１ｂが形成されるとともに、ケーシング１の底部１Ｃの反対側であるケーシング端部１Ｄにおいて、ケーシング１内に、回路基板Ｃを収納するための基板収納部１ｄが設けられている。   In addition, an opening 1b is formed in a part of the bottom 1C of the casing 1, and the casing 1D on the opposite side of the bottom 1C of the casing 1 is for housing the circuit board C in the casing 1. A substrate storage portion 1d is provided.

基板収納部１ｄに収納された回路基板Ｃの基板表面Ｃｔには、配線（不図示）が形成されており、この配線には、ステータ３のコイル３ｂを構成する導線や、電子部品９の端子（不図示）が接続されている。そして、回路基板Ｃに実装された電子部品９によって、コイル３ｂに供給する電気を制御している。   A wiring (not shown) is formed on the substrate surface Ct of the circuit board C stored in the substrate storage portion 1d. The wiring includes a lead wire constituting the coil 3b of the stator 3 and a terminal of the electronic component 9. (Not shown) is connected. The electricity supplied to the coil 3b is controlled by the electronic component 9 mounted on the circuit board C.

また、基板収納部１ｄには、ねじ穴１ｅが形成されるとともに、ねじ穴１ｅに螺合されたねじＳによって、基板収納部１ｄに収納された回路基板Ｃを覆うカバー１０が、ケーシング１に対してねじ止めされて固定されている。このようにしてケーシング１にカバー１０が固定される際に、ケーシング１とカバー１０とによって、回路基板Ｃの基板表面Ｃｔに垂直な方向（図中の矢印Ａが示す方向）において回路基板Ｃが挟まれる。   In addition, a screw hole 1e is formed in the substrate storage portion 1d, and a cover 10 that covers the circuit board C stored in the substrate storage portion 1d by a screw S screwed into the screw hole 1e is formed in the casing 1. On the other hand, it is fixed with screws. When the cover 10 is fixed to the casing 1 in this way, the circuit board C is moved in the direction perpendicular to the board surface Ct of the circuit board C by the casing 1 and the cover 10 (direction indicated by the arrow A in the figure). Sandwiched.

ここで、本実施形態においては、ケーシング１とカバー１０とによって回路基板Ｃが挟まれるともに、ケーシング１及びカバー１０と回路基板Ｃとの間に設けられた弾性部材１１，１２が、回路基板Ｃに形成された貫通孔Ｃ１に食い込むことにより、ケーシング１に対して回路基板Ｃが固定されている点に特徴がある。   Here, in the present embodiment, the circuit board C is sandwiched between the casing 1 and the cover 10, and the elastic members 11 and 12 provided between the casing 1 and the cover 10 and the circuit board C include the circuit board C. A feature is that the circuit board C is fixed to the casing 1 by biting into the through-hole C1 formed on the casing 1.

より具体的には、ケーシング１と回路基板Ｃとの間には弾性部材１１が設けられており、図１に示すように、弾性部材１１は、ケーシング１と、電子部品９が実装される基板表面Ｃｔの反対側の表面である基板表面Ｃｂとに押圧されている。この弾性部材１１は、図２及び図３（ａ）に示すように、カバー１０をケーシング１に固定する前（即ち、ケーシング１とカバー１０とによって回路基板Ｃを挟む前）においては、扁平な形状である。そして、カバー１０をケーシング１に固定する際に、ケーシング１と回路基板Ｃの基板表面Ｃｂに押圧されることにより弾性部材１１が変形して、図１及び図３（ｂ）に示すように、弾性部材１１が回路基板Ｃの貫通孔Ｃ１に食い込む。   More specifically, an elastic member 11 is provided between the casing 1 and the circuit board C. As shown in FIG. 1, the elastic member 11 is a substrate on which the casing 1 and the electronic component 9 are mounted. It is pressed against the substrate surface Cb which is the surface opposite to the surface Ct. 2 and 3A, the elastic member 11 is flat before the cover 10 is fixed to the casing 1 (that is, before the circuit board C is sandwiched between the casing 1 and the cover 10). Shape. Then, when the cover 10 is fixed to the casing 1, the elastic member 11 is deformed by being pressed against the casing 1 and the substrate surface Cb of the circuit board C, as shown in FIG. 1 and FIG. The elastic member 11 bites into the through hole C1 of the circuit board C.

また、カバー１０と回路基板Ｃとの間には弾性部材１２が設けられており、この弾性部材１２は、カバー１０と、電子部品９が実装される基板表面Ｃｔとに押圧されている。この弾性部材１２は、図２及び図３（ａ）に示すように、カバー１０をケーシング１に固定する前（即ち、ケーシング１とカバー１０とによって回路基板Ｃを挟む前）においては、弾性部材１１と同様に扁平な形状である。そして、カバー１０をケーシング１に固定する際に、カバー１０と回路基板Ｃの基板表面Ｃｔに押圧されることにより弾性部材１２が変形して、図１及び図３（ｂ）に示すように、弾性部材１２が回路基板Ｃの貫通孔Ｃ１に食い込む。   Further, an elastic member 12 is provided between the cover 10 and the circuit board C, and the elastic member 12 is pressed against the cover 10 and the substrate surface Ct on which the electronic component 9 is mounted. 2 and 3A, the elastic member 12 is an elastic member before the cover 10 is fixed to the casing 1 (that is, before the circuit board C is sandwiched between the casing 1 and the cover 10). Similar to 11, the shape is flat. Then, when the cover 10 is fixed to the casing 1, the elastic member 12 is deformed by being pressed against the cover 10 and the substrate surface Ct of the circuit board C, as shown in FIG. 1 and FIG. The elastic member 12 bites into the through hole C1 of the circuit board C.

上記構成によれば、ケーシング１とカバー１０とによって回路基板Ｃが挟まれるため、回路基板Ｃを挟むケーシング１及びカバー１０によって、回路基板Ｃの基板表面Ｃｔに垂直な方向における回路基板Ｃの移動を規制している。また、回路基板Ｃの貫通孔Ｃ１に食い込んだ弾性部材１１，１２によって、回路基板Ｃの基板表面Ｃｔに平行な面方向（図中の矢印Ｒが示す方向）における回路基板Ｃの移動を規制している。そして、回路基板Ｃに形成された貫通孔Ｃ１に食い込む弾性部材１１，１２は、上述のごとく、弾性部材１１，１２は、ケーシング１とカバー１０とによって回路基板Ｃを挟む過程において回路基板Ｃの貫通孔Ｃ１に食い込む。   According to the above configuration, since the circuit board C is sandwiched between the casing 1 and the cover 10, the circuit board C is moved in a direction perpendicular to the substrate surface Ct of the circuit board C by the casing 1 and the cover 10 that sandwich the circuit board C. Is regulated. The movement of the circuit board C in the plane direction parallel to the board surface Ct of the circuit board C (the direction indicated by the arrow R in the figure) is regulated by the elastic members 11 and 12 that have bitten into the through hole C1 of the circuit board C. ing. The elastic members 11 and 12 that bite into the through holes C1 formed in the circuit board C are, as described above, the elastic members 11 and 12 in the process of sandwiching the circuit board C between the casing 1 and the cover 10. It bites into the through hole C1.

また、本実施形態においては、弾性部材１１が、ケーシング１及びカバー１０の双方と回路基板Ｃとの間に設けられている。このため、回路基板Ｃの基板表面Ｃｔ，Ｃｂの両側から、回路基板Ｃの貫通孔Ｃ１に弾性部材１１を食い込ませることができる。   In the present embodiment, the elastic member 11 is provided between both the casing 1 and the cover 10 and the circuit board C. For this reason, the elastic member 11 can bite into the through-hole C1 of the circuit board C from both sides of the board surfaces Ct and Cb of the circuit board C.

また、本実施形態においては、弾性部材１１は、例えばシリコン系樹脂により形成された放熱シートであって、熱伝導性を有しているため、回路基板Ｃにおける熱をケーシング１やカバー１０を介して外部Ｇへ放熱することができる。   In the present embodiment, the elastic member 11 is a heat radiating sheet formed of, for example, a silicon-based resin, and has thermal conductivity. Therefore, the heat in the circuit board C is transferred via the casing 1 and the cover 10. Heat can be radiated to the external G.

上記実施形態のモータユニットＵの回路基板固定構造によれば、以下のような効果を得ることができる。
（１）モータユニットＵは、電動モータＭと電動モータＭを制御するための回路基板Ｃとを備え、電動モータＭを覆うケーシング１内には、回路基板Ｃを収納するための基板収納部１ｄが設けられるとともに、基板収納部１ｄに収納された回路基板Ｃはカバー１０によって覆われている。そして、ケーシング１とカバー１０とによって回路基板Ｃが挟まれるともに、ケーシング１及びカバー１０と回路基板Ｃとの間に設けられた弾性部材１１，１２が、回路基板Ｃに形成された貫通孔Ｃ１に食い込むことにより、ケーシング１に対して回路基板Ｃが固定されている。このため、回路基板Ｃを挟むケーシング１及びカバー１０によって、基板表面Ｃｔに垂直な方向における回路基板Ｃの移動を規制するとともに、貫通孔Ｃ１に食い込んだ弾性部材１１，１２によって、基板表面Ｃｔに平行な面方向における回路基板Ｃの移動を規制して、回路基板固定用のねじを用いずに、回路基板Ｃを確実に固定することができる。また、回路基板Ｃの移動を規制するための弾性部材１１，１２は、ケーシング１とカバー１０とによって回路基板Ｃを挟む過程において貫通孔Ｃ１に食い込ませることができるため、上記従来技術のごとく貫通孔にケーシングに形成された突起を挿通することにより回路基板を固定する場合に比し、回路基板Ｃを容易に固定することができる。また、回路基板固定用のねじを螺合するためのねじ穴や、回路基板の貫通孔に挿通するための突起をケーシング１に形成する必要がないため、上記従来技術のごとくねじ穴や突起をケーシングに形成する場合に比し、ケーシング１を容易に加工することができる。 According to the circuit board fixing structure of the motor unit U of the above embodiment, the following effects can be obtained.
(1) The motor unit U includes an electric motor M and a circuit board C for controlling the electric motor M. In the casing 1 covering the electric motor M, a board storage portion 1d for storing the circuit board C. And the circuit board C accommodated in the substrate accommodating portion 1d is covered with the cover 10. The circuit board C is sandwiched between the casing 1 and the cover 10, and the elastic members 11 and 12 provided between the casing 1 and the cover 10 and the circuit board C are through holes C <b> 1 formed in the circuit board C. The circuit board C is fixed to the casing 1 by biting into the casing 1. For this reason, the casing 1 and the cover 10 sandwiching the circuit board C regulate the movement of the circuit board C in the direction perpendicular to the board surface Ct, and the elastic members 11 and 12 biting into the through-hole C1 cause the board surface Ct to move. By restricting the movement of the circuit board C in the parallel plane direction, the circuit board C can be securely fixed without using a circuit board fixing screw. Further, since the elastic members 11 and 12 for restricting the movement of the circuit board C can be bitten into the through hole C1 in the process of sandwiching the circuit board C between the casing 1 and the cover 10, the elastic members 11 and 12 are penetrated as in the prior art. The circuit board C can be easily fixed as compared with the case where the circuit board is fixed by inserting the protrusion formed in the casing into the hole. Further, since there is no need to form on the casing 1 a screw hole for screwing a circuit board fixing screw or a projection for insertion into the through hole of the circuit board, The casing 1 can be easily processed as compared with the case where the casing 1 is formed.

（２）弾性部材１１，１２が、ケーシング１及びカバー１０の双方と回路基板Ｃとの間に設けられているため、回路基板Ｃの基板表面Ｃｔ，Ｃｂの両側から、回路基板Ｃの貫通孔Ｃ１に弾性部材１１，１２を食い込ませることができる。従って、回路基板Ｃを一層確実に固定することができる。   (2) Since the elastic members 11 and 12 are provided between both the casing 1 and the cover 10 and the circuit board C, the through holes of the circuit board C are formed from both sides of the board surfaces Ct and Cb of the circuit board C. The elastic members 11 and 12 can bite into C1. Therefore, the circuit board C can be more reliably fixed.

（３）弾性部材１１，１２は、熱伝導性を有しているため、回路基板Ｃにおける熱をケーシング１やカバー１０を介して外部Ｇへ放熱することができる。従って、回路基板Ｃにおける熱によって回路基板Ｃに実装された電子部品９が動作不良となることを回避することができる。   (3) Since the elastic members 11 and 12 have thermal conductivity, the heat in the circuit board C can be radiated to the outside G through the casing 1 and the cover 10. Therefore, it is possible to avoid malfunction of the electronic component 9 mounted on the circuit board C due to heat in the circuit board C.

なお、本発明は、上記実施形態に限定されるものではなく、本発明の趣旨に基づいて種々の設計変更をすることが可能であり、それらを本発明の範囲から除外するものではない。例えば、上記実施形態を以下のように変更してもよい。   In addition, this invention is not limited to the said embodiment, A various design change is possible based on the meaning of this invention, and they are not excluded from the scope of the present invention. For example, you may change the said embodiment as follows.

・上記実施形態においては、弾性部材１１，１２は熱伝導性を有していたが、弾性部材１１は熱伝導性を有していなくてもよい。このように構成しても、上記（１）、（２）に記載の効果を得ることができる。   -In above-mentioned embodiment, although the elastic members 11 and 12 had heat conductivity, the elastic member 11 does not need to have heat conductivity. Even if comprised in this way, the effect as described in said (1) and (2) can be acquired.

・上記実施形態においては、ケーシング１及びカバー１０の双方と回路基板Ｃとの間に弾性部材１１，１２が設けられていたが、弾性部材１１，１２のいずれか一方のみが設けられていてもよい。即ち、ケーシング１及びカバー１０の少なくとも一方と回路基板Ｃとの間に弾性部材が設けられていれば、上記（１）と同様の効果を得ることができる。即ち、ケーシング１と回路基板Ｃとの間に弾性部材１１が設けられている場合は、貫通孔Ｃ１に食い込んだ弾性部材１１によって、基板表面Ｃｔに平行な面方向における回路基板Ｃの移動を規制して、回路基板固定用のねじを用いずに、回路基板Ｃを確実に固定することができる。一方、ケーシング１と回路基板Ｃとの間に弾性部材１２が設けられている場合は、貫通孔Ｃ１に食い込んだ弾性部材１２によって、基板表面Ｃｔに平行な面方向における回路基板Ｃの移動を規制して、回路基板固定用のねじを用いずに、回路基板Ｃを確実に固定することができる。   In the above embodiment, the elastic members 11 and 12 are provided between the casing 1 and the cover 10 and the circuit board C. However, only one of the elastic members 11 and 12 is provided. Good. That is, if an elastic member is provided between at least one of the casing 1 and the cover 10 and the circuit board C, the same effect as the above (1) can be obtained. That is, when the elastic member 11 is provided between the casing 1 and the circuit board C, the movement of the circuit board C in the plane direction parallel to the substrate surface Ct is regulated by the elastic member 11 that has digged into the through hole C1. Thus, the circuit board C can be securely fixed without using the circuit board fixing screw. On the other hand, when the elastic member 12 is provided between the casing 1 and the circuit board C, the movement of the circuit board C in the plane direction parallel to the substrate surface Ct is regulated by the elastic member 12 that has digged into the through hole C1. Thus, the circuit board C can be securely fixed without using the circuit board fixing screw.

次に、上記実施形態から把握できる技術的思想について、その効果とともに以下に追記する。
請求項１に記載のモータユニットの回路基板固定構造、または請求項２に記載のモータユニットにおいて、前記第１弾性部材または前記第２弾性部材は、熱伝導性を有する。 Next, the technical idea that can be grasped from the above embodiment will be described below together with the effects.
The circuit board fixing structure of the motor unit according to claim 1 or the motor unit according to claim 2, wherein the first elastic member or the second elastic member has thermal conductivity.

同構成によれば、回路基板に係合する弾性部材は熱伝導性を有しているため、回路基板における熱をケーシングやカバーを介して外部へ放熱することができる。従って、例えば、回路基板における熱によって回路基板に実装された電子部品が動作不良となることを回避することができる。   According to this configuration, since the elastic member engaged with the circuit board has thermal conductivity, the heat in the circuit board can be radiated to the outside through the casing and the cover. Therefore, for example, it is possible to avoid an electronic component mounted on the circuit board from malfunctioning due to heat in the circuit board.

本発明の実施形態に係るモータユニットを示す概略構成図。The schematic block diagram which shows the motor unit which concerns on embodiment of this invention. 本発明の実施形態に係るモータユニットを説明するための分解斜視図。The disassembled perspective view for demonstrating the motor unit which concerns on embodiment of this invention. （ａ）（ｂ）本発明の実施形態に係るモータユニットの回路基板固定構造を説明するための部分断面図。(A) (b) The fragmentary sectional view for demonstrating the circuit board fixing structure of the motor unit which concerns on embodiment of this invention.

符号の説明Explanation of symbols

Ａ…回路基板の基板表面に垂直な方向、Ｒ…回路基板の基板表面に平行な面方向、Ｕ…モータユニット、Ｍ…電動モータ、Ｃ…回路基板、Ｃ１…貫通孔、Ｃｔ，Ｃｂ…基板表面、Ｇ…外部、１…ケーシング、１ｄ…基板収納部、１０…カバー、１１，１２…弾性部材。   A: direction perpendicular to substrate surface of circuit board, R: plane direction parallel to substrate surface of circuit board, U: motor unit, M: electric motor, C: circuit board, C1: through hole, Ct, Cb: substrate Surface, G ... outside, 1 ... casing, 1d ... substrate storage part, 10 ... cover, 11, 12 ... elastic member.

Claims (2)

モータユニットの回路基板固定構造であって、  A circuit board fixing structure of a motor unit,
前記モータユニットは、ケーシング、カバー、電動モータ、回路基板、第１弾性部材、および第２弾性部材を有し、  The motor unit has a casing, a cover, an electric motor, a circuit board, a first elastic member, and a second elastic member,
前記電動モータは、前記ケーシングに収納され、  The electric motor is housed in the casing;
前記ケーシングは、基板収納部を有し、  The casing has a substrate storage portion,
前記回路基板は、前記基板収納部に収納され、前記電動モータと電気的に接続され、貫通孔を有し、  The circuit board is housed in the board housing portion, electrically connected to the electric motor, and has a through hole,
前記カバーは、前記ケーシングに固定され、前記回路基板を覆い、  The cover is fixed to the casing and covers the circuit board;
前記第１弾性部材は、前記ケーシングと前記回路基板との間に配置され、前記貫通孔の開口長さよりも大きい長さを有し、  The first elastic member is disposed between the casing and the circuit board, and has a length larger than an opening length of the through hole,
前記第２弾性部材は、前記カバーと前記回路基板との間に配置され、前記貫通孔の開口長さよりも大きい長さを有し、  The second elastic member is disposed between the cover and the circuit board, and has a length larger than an opening length of the through hole,
前記回路基板固定構造は、前記回路基板が前記ケーシングと前記カバーとにより挟まれ、前記第１弾性部材が前記貫通孔に食い込み、前記第２弾性部材が前記貫通孔に食い込むことにより、前記回路基板を前記ケーシングに固定している  In the circuit board fixing structure, the circuit board is sandwiched between the casing and the cover, the first elastic member bites into the through hole, and the second elastic member bites into the through hole. Is fixed to the casing
モータユニットの回路基板固定構造。  Motor unit circuit board fixing structure. 請求項１に記載の回路基板固定構造を有するモータユニット。  A motor unit having the circuit board fixing structure according to claim 1.
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WO2018029894A1 (en) * 2016-08-12 2018-02-15 日本電産株式会社 Motor and electric power steering device
WO2018096710A1 (en) * 2016-11-23 2018-05-31 日本電産株式会社 Motor and electric power steering device
US10938271B2 (en) 2016-11-23 2021-03-02 Nidec Corporation Motor and electric power steering device

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