JP4932012B2 - Electric hub unit - Google Patents

Electric hub unit Download PDF

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JP4932012B2
JP4932012B2 JP2010018408A JP2010018408A JP4932012B2 JP 4932012 B2 JP4932012 B2 JP 4932012B2 JP 2010018408 A JP2010018408 A JP 2010018408A JP 2010018408 A JP2010018408 A JP 2010018408A JP 4932012 B2 JP4932012 B2 JP 4932012B2
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hub
motor
reduction gear
unit
motor case
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JP2011156911A (en
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良範 深作
将人 岩瀬
里美 大久保
慧 中村
達俊 新條
▲ひろ▼康 野口
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Nidec Copal Corp
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Nidec Copal Corp
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Priority to JP2010018408A priority Critical patent/JP4932012B2/en
Priority to CN2011200374317U priority patent/CN201999165U/en
Priority to TW100103430A priority patent/TW201127693A/en
Priority to CN201110037351.6A priority patent/CN102139738B/en
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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

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  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)
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Description

本発明は、電動車（例えば、電動自転車、電動アシスト自転車、歩行介助車など）に利用される電動ハブユニットに関するものである。   The present invention relates to an electric hub unit used for an electric vehicle (for example, an electric bicycle, an electric assist bicycle, a walking assistance vehicle, etc.).

従来、このような分野の技術として、特開２００２−３６２４６７号公報がある。この公報に記載された電動ハブユニットは、コイル及びマグネットを収容したモータケーシングと、モータの周囲で車軸を中心に回転するハブと、モータの出力を減速させてハブに伝達する遊星歯車機構と、コイルへの通電を制御する回路基板と、を備えている。そして、遊星歯車機構は、モータケーシング内に収容され、回路基板は、モータケーシングの外壁に固定されている。   Conventionally, as a technology in such a field, there is JP-A-2002-362467. The electric hub unit described in this publication includes a motor casing that houses a coil and a magnet, a hub that rotates around the axle around the motor, a planetary gear mechanism that decelerates the output of the motor and transmits it to the hub, And a circuit board for controlling energization to the coil. The planetary gear mechanism is accommodated in the motor casing, and the circuit board is fixed to the outer wall of the motor casing.

特開２００２−３６２４６７号公報JP 2002-362467 A 特開２０００−５３０６８号公報JP 2000-53068 A

しかしながら、前述した従来の電動ハブユニットでは、遊星歯車機構で発生した歯車の摩耗粉がグリースと一緒に飛散すると、摩耗粉がコイルやマグネットに付着し易く、これによって、モータの回転不良が起こり易いといった問題点があった。
また、特開２０００−５３０６８号公報に開示された電動ハブユニットの回路基板は、モータのケーシング内に既に格納されているので、歯車の摩耗粉が回路基板に付着することはないが、このような構成は、回路基板上の電子部品がコイルから発生する熱の影響を受け易く、電子部品の寿命を縮めたり、電子部品に誤作動を発生させて、モータの回転不良の原因になる。 However, in the above-described conventional electric hub unit, if the wear powder of the gear generated by the planetary gear mechanism is scattered together with the grease, the wear powder easily adheres to the coil and the magnet, and thus the rotation failure of the motor is likely to occur. There was a problem.
In addition, since the circuit board of the electric hub unit disclosed in Japanese Patent Laid-Open No. 2000-53068 is already stored in the motor casing, gear abrasion powder does not adhere to the circuit board. Such a configuration causes the electronic components on the circuit board to be easily affected by the heat generated from the coil, shortening the life of the electronic components or causing malfunctions in the electronic components, causing a rotation failure of the motor.

本発明は、モータ部の回転不良を回避させるようにした電動ハブユニットを提供することを目的とする。   An object of the present invention is to provide an electric hub unit that avoids a rotation failure of a motor unit.

本発明は、車軸の軸線を中心に回転するハブ内に、モータ部が内蔵された電動ハブユニットにおいて、
ハブ内には、
モータケース内にロータ及びステータが収容されたモータ部と、
ロータの回転を減速してハブに伝達する減速歯車部と、
ロータの回転を制御する回路基板と、を備え、
モータケースの軸線方向における一端部には、軸線を中心としたリング状の開口部が形成され、開口部内には減速歯車部が配置され、モータケースの軸線方向における他端部には端壁が形成され、端壁とハブとの間に回路基板が配置され、モータケース内には、減速歯車部とモータ部内のロータ及びステータとを仕切る仕切板が配置されていることを特徴とする。 The present invention provides an electric hub unit in which a motor unit is incorporated in a hub that rotates about an axis of an axle.
In the hub,
A motor unit in which a rotor and a stator are housed in a motor case;
A reduction gear portion that reduces the rotation of the rotor and transmits it to the hub;
A circuit board for controlling the rotation of the rotor,
A ring-shaped opening centered on the axis is formed at one end in the axial direction of the motor case, a reduction gear portion is disposed in the opening, and an end wall is provided at the other end in the axial direction of the motor case. The circuit board is disposed between the end wall and the hub, and a partition plate that partitions the reduction gear portion and the rotor and stator in the motor portion is disposed in the motor case.

この電動ハブユニットにおいては、モータケースによって減速歯車部と回路基板とが分離され、仕切板によって減速歯車部とモータ部のロータ及びステータとが分離されている。また、モータケースの開口部内に減速歯車部が配置されているので、ハブに関しては、軸線方向即ち車幅方向の長さを短くすることができ、ハブを薄型化させることができる。この薄型化の達成のために、減速歯車部をモータケース内に配置させた結果として、減速歯車部とモータ部のロータ及びステータとが接近し、歯車の摩耗粉の影響をロータ及びステータが受け易くなっているが、減速歯車部で発生した歯車の摩耗粉がグリースと一緒に飛散しても、仕切板によって摩耗粉がロータやステータに付着し難く、モータ部の回転不良を回避させることができる。更に、回路基板は、モータケース内に配置された減速歯車部から遠く離されて、モータケースの端壁の外に配置されているので、歯車の摩耗粉が極めて付着し難い。そして、回路基板は、モータケースの端壁によってコイルから隔てられているので、コイルから発生する熱は、モータケースによって回路基板に直接伝達し難く、回路基板上の電子部品の寿命低下や、電子部品の誤作動を防止することができる。 In this electric hub unit, the reduction gear portion and the circuit board are separated by the motor case, and the reduction gear portion and the rotor and stator of the motor portion are separated by the partition plate. Further, since the reduction gear portion is disposed in the opening of the motor case, the length of the hub in the axial direction, that is, the vehicle width direction can be shortened, and the hub can be thinned. In order to achieve this reduction in thickness, the reduction gear portion is arranged in the motor case. As a result, the reduction gear portion and the rotor and stator of the motor portion approach each other, and the rotor and stator are affected by gear dust. Although it is easy, even if the gear wear powder generated in the reduction gear is scattered together with the grease, the wear powder is difficult to adhere to the rotor or stator by the partition plate, and it is possible to avoid the rotation failure of the motor section. it can. Furthermore, since the circuit board is disposed far away from the reduction gear portion disposed in the motor case and is disposed outside the end wall of the motor case, the abrasion powder of the gear is hardly attached. Since the circuit board is separated from the coil by the end wall of the motor case , it is difficult for the heat generated from the coil to be directly transmitted to the circuit board by the motor case. It is possible to prevent malfunction of parts.

また、減速歯車部は、遊星歯車機構からなり、減速歯車部の遊星歯車は、ハブの軸線方向における一端部からハブの内方に向けて、軸線方向に突出する軸部に回転自在に取り付けられ、遊星歯車は、ハブの一端部と仕切板との間に配置され、仕切板は、軸部の遊端にネジにより固定されていると好適である。
ハブから突出して遊星歯車の回転を支持する軸部を有効に利用することで、仕切板をネジによって簡単に固定させることができる。そして、仕切板をハブに固定すると、ハブ内にモータ部を組み付ける際に遊星歯車が落下することがないので、組立て作業性が良好になる。また、電動ハブユニットの内部の分解掃除の際に、ネジの採用によって仕切板を容易に外すことができ、遊星歯車機構にグリースを注入し易い。 The reduction gear portion is composed of a planetary gear mechanism, and the planetary gear of the reduction gear portion is rotatably attached to a shaft portion protruding in the axial direction from one end portion in the axial direction of the hub toward the inside of the hub. The planetary gear is preferably disposed between one end of the hub and the partition plate, and the partition plate is preferably fixed to the free end of the shaft portion with a screw.
By effectively using the shaft portion that protrudes from the hub and supports the rotation of the planetary gear, the partition plate can be easily fixed with screws. And if a partition plate is fixed to a hub, when a motor part is assembled | attached in a hub, a planetary gear will not fall, Therefore Assembling workability | operativity becomes favorable. Further, when disassembling and cleaning the inside of the electric hub unit, the partition plate can be easily removed by using screws, and it is easy to inject grease into the planetary gear mechanism.

本発明によれば、モータ部の回転不良を回避させることができる。   According to the present invention, poor rotation of the motor unit can be avoided.

本発明に係る電動ハブユニットの一実施形態を示す断面図である。It is sectional drawing which shows one Embodiment of the electric hub unit which concerns on this invention. 図１に示された電動ハブユニットの分解断面図である。FIG. 2 is an exploded sectional view of the electric hub unit shown in FIG. 1. 遊星歯車機構及び仕切板を示す平面図である。It is a top view which shows a planetary gear mechanism and a partition plate.

以下、図面を参照しつつ本発明に係る電動ハブユニットの好適な実施形態について詳細に説明する。   Hereinafter, preferred embodiments of an electric hub unit according to the present invention will be described in detail with reference to the drawings.

図１及び図２に示すように、電動ハブユニット１は、電動自転車、電動アシスト自転車、電動バイク、電動自動車などの車輪に利用される。この電動ハブユニット１は、車軸２が貫通したモータ部３と、車軸２を中心に回転するハブ４と、モータ部３の出力を減速させてハブ４に伝達する減速歯車部６と、モータ部３を制御する回路基板７と、車軸２に対してハブ４を回転自在に支持する左右一対の軸受部３０，３１と、を主たる構成部品として備えている。そして、ハブ４内には、モータ部３と減速歯車部６と回路基板７とが収容されている。   As shown in FIGS. 1 and 2, the electric hub unit 1 is used for wheels of an electric bicycle, an electric assist bicycle, an electric motorcycle, an electric automobile, and the like. The electric hub unit 1 includes a motor unit 3 through which an axle 2 penetrates, a hub 4 that rotates around the axle 2, a reduction gear unit 6 that decelerates the output of the motor unit 3 and transmits it to the hub 4, and a motor unit. The circuit board 7 which controls 3 and a pair of left and right bearings 30 and 31 which rotatably support the hub 4 with respect to the axle 2 are provided as main components. In the hub 4, the motor unit 3, the reduction gear unit 6, and the circuit board 7 are accommodated.

モータ部３は、車軸２の軸線Ｌ方向における一端が開放されて他端に車軸２が固定されたモータケース１０を有し、モータケース１０の周囲でハブ４は回転するので、モータケース１０の外周壁１０ｂは、ハブ４から離間させられている。このようなモータケース１０内には、コア１１にコイル１２が巻かれたステータ１３と、ステータ１３に対して回転するロータ１４とを備えている。ステータ１３は、樹脂によるモールド部Ｍ１によって封止され、ロータ１４は、ステータ１３より内側に位置する円筒状のマグネット１６と、マグネット１６と車軸２との間に介装されて、モータ部３が電気的にロックされてもハブ４の回転を可能にするスリップ制御手段１７と、で構成されている。   The motor unit 3 has a motor case 10 with one end opened in the axis L direction of the axle 2 and the axle 2 fixed to the other end, and the hub 4 rotates around the motor case 10. The outer peripheral wall 10 b is separated from the hub 4. In such a motor case 10, a stator 13 having a coil 12 wound around a core 11 and a rotor 14 rotating with respect to the stator 13 are provided. The stator 13 is sealed by a mold part M1 made of resin, and the rotor 14 is interposed between the cylindrical magnet 16 located inside the stator 13 and the magnet 16 and the axle 2 so that the motor part 3 is And slip control means 17 that allows the hub 4 to rotate even when electrically locked.

モータケース１０の軸線Ｌ方向における一端部には、軸線Ｌを中心としたリング状の開口部１０ａが形成されている。この開口部１０ａは、モータケース１０の平坦な端面の略全体に渡って形成され、開口部１０ａ内には、減速歯車部としての遊星歯車機構６が配置されている。   At one end of the motor case 10 in the direction of the axis L, a ring-shaped opening 10a centering on the axis L is formed. The opening 10 a is formed over substantially the entire flat end surface of the motor case 10, and the planetary gear mechanism 6 as a reduction gear unit is disposed in the opening 10 a.

遊星歯車機構６は、ロータ１４の一部として構成されると共に、開口部１０ａの位置で車軸２の周囲を回転する太陽歯車２１と、開口部１０ａの位置でモータケース１０の外周壁１０ｂの端部に形成された内歯車２２と、キャリアとして機能するハブ４に軸支されると共に、太陽歯車２１と内歯車２２との間に配置されて、太陽歯車２１及び内歯車２２と噛合する４個の遊星歯車２３と、を備えている（図３参照）。そして、各遊星歯車２３は、ハブ４の軸線Ｌ方向における一端部からハブ４の内方に向けて軸線Ｌ方向に突出する軸部２６に、軸受２７を介して回転自在に取り付けられている。   The planetary gear mechanism 6 is configured as a part of the rotor 14, and also includes a sun gear 21 that rotates around the axle 2 at the position of the opening 10a, and an end of the outer peripheral wall 10b of the motor case 10 at the position of the opening 10a. 4 which are supported by the internal gear 22 formed in the section and the hub 4 which functions as a carrier, and which are arranged between the sun gear 21 and the internal gear 22 and mesh with the sun gear 21 and the internal gear 22. Planetary gear 23 (see FIG. 3). Each planetary gear 23 is rotatably attached to a shaft portion 26 protruding in the axis L direction from one end portion in the axis L direction of the hub 4 toward the inside of the hub 4 via a bearing 27.

このような遊星歯車機構６では、ロータ１４と一緒に太陽歯車２１が回転し、太陽歯車２１の周囲で遊星歯車２３が公転することでハブ４が回転し、ロータ１４の回転は減速されてハブ４に伝達される。そして、遊星歯車機構６は、偏平であるので、開口部１０ａを塞ぐように配置させることができ、ハブ４の薄型化に寄与している。   In such a planetary gear mechanism 6, the sun gear 21 rotates together with the rotor 14, the planetary gear 23 revolves around the sun gear 21, the hub 4 rotates, and the rotation of the rotor 14 is decelerated to reduce the hub. 4 is transmitted. Since the planetary gear mechanism 6 is flat, the planetary gear mechanism 6 can be disposed so as to close the opening 10a, contributing to the thinning of the hub 4.

ドラム状のハブ４は、カップ形状をなすハブ本体部４Ａと、ハブ本体部４Ａの開口端４ａを閉鎖する偏平なカバー部４Ｂとからなる。ハブ本体部４Ａに形成されたフランジ部４ｅと、カバー部４Ｂに形成されたフランジ部４ｂとを突き合わせた状態で、ネジ２８により、ハブ本体部４Ａとカバー部４Ｂとが一体化されている。そして、ハブ本体部４Ａとカバー部４Ｂとの重なり部分には、リング状のシールゴム２９が介装されている。   The drum-shaped hub 4 includes a hub body portion 4A having a cup shape and a flat cover portion 4B that closes the opening end 4a of the hub body portion 4A. In a state where the flange portion 4e formed on the hub body portion 4A and the flange portion 4b formed on the cover portion 4B face each other, the hub body portion 4A and the cover portion 4B are integrated by the screw 28. A ring-shaped seal rubber 29 is interposed in an overlapping portion between the hub main body portion 4A and the cover portion 4B.

さらに、軸線Ｌ方向において、ハブ本体部４Ａの端部に形成された車軸突出孔４ｃには、車軸２に対するハブ４の回転を支持するための転がり軸受からなる第１の軸受部３０が装着され、カバー部４Ｂの端部に形成された車軸突出孔４ｄには、車軸２に対するハブ４の回転を支持するための転がり軸受からなる第２の軸受部３１が装着されている。そして、車軸２の一端部には、第１の軸受部３０を保持する第１のナット部３２が螺着され、第１の軸受部３０の外輪３０ａがハブ４のハブ本体部４Ａに当接し、第１の軸受部３０の内輪３０ｂが第１のナット部３２に当接することで、第１の軸受部３０の脱落を防止している。同様に、車軸２の他端部には、第２の軸受部３１を保持する第２のナット部３３が螺着され、第２の軸受部３１の外輪３１ａがハブ４のカバー部４Ｂに当接し、第２の軸受部３１の内輪３１ｂが第２のナット部３３に当接することで、第２の軸受部３１の脱落を防止している。   Further, in the axis L direction, a first bearing portion 30 formed of a rolling bearing for supporting the rotation of the hub 4 with respect to the axle 2 is mounted in the axle projecting hole 4c formed in the end portion of the hub body portion 4A. A second bearing portion 31 formed of a rolling bearing for supporting the rotation of the hub 4 with respect to the axle 2 is attached to the axle projecting hole 4d formed at the end of the cover portion 4B. A first nut portion 32 that holds the first bearing portion 30 is screwed to one end portion of the axle 2, and the outer ring 30 a of the first bearing portion 30 comes into contact with the hub body portion 4 A of the hub 4. Since the inner ring 30b of the first bearing portion 30 abuts on the first nut portion 32, the first bearing portion 30 is prevented from falling off. Similarly, a second nut portion 33 that holds the second bearing portion 31 is screwed to the other end portion of the axle 2, and the outer ring 31 a of the second bearing portion 31 contacts the cover portion 4 B of the hub 4. In contact, the inner ring 31b of the second bearing portion 31 abuts against the second nut portion 33, thereby preventing the second bearing portion 31 from falling off.

カバー部４Ｂとモータケース１０の端壁１０ｃと第２の軸受部３１とで画成された空間内に円板状の回路基板７が配置され、電子部品が実装された回路基板７は、樹脂によるモールド部Ｍ２によって封止されている。この回路基板７の中央開口７ａ内には、モータケース１０の端壁１０ｃから車軸２に沿って突出する突起部１０ｄが挿入され、回路基板７は、モータケース１０の端壁１０ｃに接近され且つ平行に配置されている。そして、回路基板７に結線された配線３４は、第２の軸受部３１の内輪３１ｂを貫通して外部に排出され、第２の軸受部３１の内輪３１ｂに形成された配線引出し孔３５には、シール材３９が充填されている。   A circuit board 7 in which a disk-like circuit board 7 is arranged in a space defined by the cover part 4B, the end wall 10c of the motor case 10 and the second bearing part 31 and an electronic component is mounted is made of resin. Is sealed by a mold part M2. In the central opening 7a of the circuit board 7, a protrusion 10d protruding from the end wall 10c of the motor case 10 along the axle 2 is inserted, and the circuit board 7 is brought close to the end wall 10c of the motor case 10 and They are arranged in parallel. Then, the wiring 34 connected to the circuit board 7 passes through the inner ring 31b of the second bearing portion 31 and is discharged to the outside, and enters the wiring lead-out hole 35 formed in the inner ring 31b of the second bearing portion 31. The sealing material 39 is filled.

この電動ハブユニット１においては、遊星歯車機構（減速歯車部）６とモータ部３内のロータ１４及びステータ１３とを仕切るように、軸線Ｌに対して垂直に配置された円板状の仕切板３６が、モータケース１０内で別部品として配置され、この仕切板３６は、遊星歯車２３を支持する軸部２６の遊端に当接し、軸部２６の雌ねじ部２６ａに螺着されたネジ３７により固定されている。図３では、４カ所の軸部２６全てにネジ３７を螺着して仕切板３６を固定したが、軸受２７の脱落が防止できれば、軸部２６と仕切板３６との当接箇所全てで固定する必要はない。仕切板３６の外周端は、モータケース１０の外周壁１０ｂに近接され、仕切板３６の中央開口部３６ａには、車軸２が貫通し、中央開口部３６ａから太陽歯車２１を突出させている。また、ネジ３７は、緩み止めのためにワッシャ３８を介して仕切板３６に挿入されている。   In the electric hub unit 1, a disk-shaped partition plate arranged perpendicular to the axis L so as to partition the planetary gear mechanism (reduction gear unit) 6 from the rotor 14 and the stator 13 in the motor unit 3. 36 is disposed as a separate part in the motor case 10, and the partition plate 36 abuts on the free end of the shaft portion 26 that supports the planetary gear 23, and is a screw 37 that is screwed into the female screw portion 26 a of the shaft portion 26. It is fixed by. In FIG. 3, screws 37 are screwed onto all of the four shaft portions 26 to fix the partition plate 36. However, if the bearing 27 can be prevented from falling off, the shaft portions 26 and the partition plate 36 are fixed at all contact points. do not have to. The outer peripheral end of the partition plate 36 is close to the outer peripheral wall 10b of the motor case 10, the axle 2 penetrates through the central opening 36a of the partition plate 36, and the sun gear 21 protrudes from the central opening 36a. Further, the screw 37 is inserted into the partition plate 36 via a washer 38 to prevent loosening.

この仕切板３６によって、減速歯車部６とモータ部３内のロータ１４及びステータ１３とが分離され、モータケース１０によって減速歯車部６と回路基板７とが分離されている。また、モータケース１０の開口部１０ａ内に減速歯車部６が配置されているので、ハブ４に関しては、軸線Ｌ方向即ち車幅方向の長さを短くすることができ、ハブ４を薄型化させることができる。   The reduction gear part 6 is separated from the rotor 14 and the stator 13 in the motor part 3 by the partition plate 36, and the reduction gear part 6 and the circuit board 7 are separated from each other by the motor case 10. Further, since the reduction gear portion 6 is disposed in the opening 10a of the motor case 10, the length of the hub 4 in the axis L direction, that is, the vehicle width direction can be shortened, and the hub 4 can be thinned. be able to.

この薄型化の達成のために、減速歯車部６をモータケース１０内に配置させた結果として、減速歯車部６とモータ部３内のロータ１４及びステータ１３とが接近し、歯車２１，２２，２３の摩耗粉の影響をロータ１４及びステータ１３が受け易くなっているが、減速歯車部６で発生した歯車２１，２２，２３の摩耗粉が、減速歯車部６に塗布されたグリースと一緒に飛散しても、仕切板３６によって、摩耗粉がロータ１４やステータ１３に付着し難く、摩耗粉の噛み込みによるモータ部３の回転不良を回避させることができる。更に、回路基板７は、モータケース１０内に配置された減速歯車部６から遠く離されて、モータケース１０の外に配置されているので、歯車２１，２２，２３の摩耗粉が極めて付着し難い。そして、回路基板７は、モータケース１０によってコイル１２から隔てられているので、コイル１２から発生する熱は、モータケース１０によって回路基板７に伝達し難く、回路基板７上の電子部品の寿命低下や、電子部品の誤作動を防止することができる。   In order to achieve this reduction in thickness, as a result of disposing the reduction gear portion 6 in the motor case 10, the reduction gear portion 6 and the rotor 14 and the stator 13 in the motor portion 3 approach each other, and the gears 21, 22, Although the rotor 14 and the stator 13 are easily affected by the wear powder 23, the wear powder of the gears 21, 22 and 23 generated in the reduction gear unit 6 is combined with the grease applied to the reduction gear unit 6. Even if scattered, the partition plate 36 makes it difficult for the wear powder to adhere to the rotor 14 and the stator 13, and it is possible to avoid the rotation failure of the motor unit 3 due to the biting of the wear powder. Further, since the circuit board 7 is arranged far away from the reduction gear portion 6 disposed in the motor case 10 and disposed outside the motor case 10, the abrasion powder of the gears 21, 22, and 23 is extremely attached. hard. Since the circuit board 7 is separated from the coil 12 by the motor case 10, the heat generated from the coil 12 is difficult to transfer to the circuit board 7 by the motor case 10, and the lifetime of the electronic components on the circuit board 7 is reduced. In addition, malfunction of electronic components can be prevented.

そして、遊星歯車２３の回転を支持する軸部２６を有効に利用することで、仕切板３６をネジ３７によって簡単に固定させることができる。そして、仕切板３６をハブ４に固定すると、ハブ４内にモータ部３を組み付ける際に遊星歯車２３が落下することがないので、ハブ４のハブ本体４Ａ内にモータ部３を組み込む際の作業性が良好になる。また、電動ハブユニット１の内部の分解掃除の際に、ネジ３７の採用によって仕切板３６を容易に外すことができる。   The partition plate 36 can be easily fixed by the screws 37 by effectively using the shaft portion 26 that supports the rotation of the planetary gear 23. When the partition plate 36 is fixed to the hub 4, the planetary gear 23 does not fall when the motor unit 3 is assembled into the hub 4. Therefore, the work when the motor unit 3 is assembled into the hub body 4 </ b> A of the hub 4. Good. Further, when the inside of the electric hub unit 1 is disassembled and cleaned, the partition plate 36 can be easily removed by using the screws 37.

本発明は、前述した実施形態に限定されないことは言うまでもない。例えば、仕切板３６は、軸部２６の遊端に溶接やカシメ等により固定されてもよい。   It goes without saying that the present invention is not limited to the embodiment described above. For example, the partition plate 36 may be fixed to the free end of the shaft portion 26 by welding, caulking, or the like.

１…電動ハブユニット ２…車軸 ３…モータ部 ４…ハブ ６…減速歯車部（遊星歯車機構） ７…回路基板 １０…モータケース １０ａ…開口部 １３…ステータ １４…ロータ ２３…遊星歯車 ２６…軸部 ３６…仕切板 ３７…ネジ   DESCRIPTION OF SYMBOLS 1 ... Electric hub unit 2 ... Axle 3 ... Motor part 4 ... Hub 6 ... Reduction gear part (planetary gear mechanism) 7 ... Circuit board 10 ... Motor case 10a ... Opening part 13 ... Stator 14 ... Rotor 23 ... Planetary gear 26 ... Shaft Part 36 ... Partition plate 37 ... Screw

Claims (2)

車軸の軸線を中心に回転するハブ内に、モータ部が内蔵された電動ハブユニットにおいて、
前記ハブ内には、
モータケース内にロータ及びステータが収容された前記モータ部と、
前記ロータの回転を減速して前記ハブに伝達する減速歯車部と、
前記ロータの回転を制御する回路基板と、を備え、
前記モータケースの軸線方向における一端部には、前記軸線を中心としたリング状の開口部が形成され、前記開口部内には前記減速歯車部が配置され、前記モータケースの前記軸線方向における他端部には端壁が形成され、前記端壁と前記ハブとの間に前記回路基板が配置され、前記モータケース内には、前記減速歯車部と前記モータ部内の前記ロータ及び前記ステータとを仕切る仕切板が配置されていることを特徴とする電動ハブユニット。 In an electric hub unit that has a motor part built in a hub that rotates around the axis of the axle,
In the hub,
The motor unit in which a rotor and a stator are housed in a motor case;
A reduction gear portion for reducing the rotation of the rotor and transmitting it to the hub;
A circuit board for controlling the rotation of the rotor,
A ring-shaped opening centered on the axis is formed at one end of the motor case in the axial direction, the reduction gear portion is disposed in the opening, and the other end of the motor case in the axial direction An end wall is formed in the part , and the circuit board is disposed between the end wall and the hub, and the reduction gear part, the rotor in the motor part, and the stator are partitioned in the motor case. An electric hub unit in which a partition plate is arranged. 前記減速歯車部は、遊星歯車機構からなり、前記減速歯車部の遊星歯車は、前記ハブの軸線方向における一端部から前記ハブの内方に向けて、軸線方向に突出する軸部に回転自在に取り付けられ、
前記遊星歯車は、前記ハブの前記一端部と前記仕切板との間に配置され、前記仕切板は、前記軸部の遊端にネジにより固定されていることを特徴とする請求項１記載の電動ハブユニット。 The reduction gear portion is composed of a planetary gear mechanism, and the planetary gear of the reduction gear portion is rotatable about a shaft portion protruding in the axial direction from one end portion in the axial direction of the hub toward the inside of the hub. Attached,
The planetary gear is disposed between the one end portion of the hub and the partition plate, and the partition plate is fixed to a free end of the shaft portion with a screw. Electric hub unit.
JP2010018408A 2010-01-29 2010-01-29 Electric hub unit Expired - Fee Related JP4932012B2 (en)

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