201208236 六、發明說明： 【發明所屬之技術領域】 本發明是有關於一種馬達，特& & p 竹乃〗疋知一種直流無刷的 輪較馬達。 【先前技術】201208236 VI. Description of the Invention: [Technical Field of the Invention] The present invention relates to a motor, a <amp;&p; [Prior Art]
以往的直流無刷馬達結構（例如台灣新型證書號 Μ358466所揭露之結構）中，電磁鐵與霍爾感測元件二設 置在馬達本體的外部，並且藉由—馬達外蓋蓋設遮蔽，然 而’這樣的做法需要多出馬達外蓋的成本，此外，由於電 磁鐵是套設在馬達的轉轴上並且隨著馬達的轉子轉動，當 電磁鐵設龍定的穩定度較*足時，容易在隨著馬達轉子 轉動的過程中因晃動而產生偏心或產生軸向位移，因而影 響霍爾感測元件的感測效果。 【發明内容】 + « ·Γ #风狀—樘解決前」 直流無刷馬達，且該直流無刷馬達係做為輪轂馬達 於是，本發明輪轂馬達供設置於一輪框，該輪較馬達 包3—疋子單兀、一轉子單元、一感測電路單元與一磁 環。該轉子單元形成有一軸部，該軸部可相對轉動的穿設 於該定子單元。該感測電路單元包括—設置於該定子單元 的電路板以及複數設置於該電路板的感測元件。該磁環圍 繞該軸部地設置固定於該轉子單元並且包括一徑向延伸並 且軸向間隔對應該等感測元件的第一環片以及一轴向延伸 連接該第-環片的第二環片，該第—環片具有複數極數。 201208236 本發明之功效在於，藉由該磁環的結構設計，可使該 磁環較穩定的固定在該轉子單元，避免該磁環在隨該轉子 單元旋轉的過程中產生偏心轉動的問題，而將該磁環設置 於該轉子單元與定子單元之間並且受兩者的包覆固裝，一 則增加該磁環結合在該轉子單元的結構穩定度，以抵抗高 速旋轉所產生的離心力，二則可省去外蓋元件的設置，並 且避免磁環觉外界污染或干擾。 【實施方式】 有關本發明之前述及其他技術内容、特點與功效，在 以下配合參考圖式之一個較佳實施例的詳細說明中，將可 清楚的呈現。 參閱圖1、圖2’本發明輪轂馬連1〇〇的一個較佳實施 例可供設置在一電動機車的輪框101，該輪轂馬達1〇〇包含 一轉子單元1、一設置在轉子單元1的磁環2、一定子單元 3、一設置在定子單元3的感測電路單元4、複數軸承51、 52以及一轉子單元固定座6。 參閱圖1至圖3’轉子單元1形成有一軸部，且轴部是 可相對轉動的穿設於定子單元3，更詳細的說，轉子單元1 包括一轉子外殼11、一轉子輸出軸12以及複數磁鐵114, 轉子外殼11包括一基壁111以及一由基壁ηι延伸出的圍 繞壁112，基壁111與圍繞壁112配合界定出一内部空間 110,且基壁111設有一連通内部空間丨1〇的轴孔113,該 等磁鐵114設置在圍繞壁112的内壁面。 轉子輸出軸12包括一轴桿121以及一由軸桿121往外 201208236In the conventional DC brushless motor structure (for example, the structure disclosed in Taiwan New Certificate No. 358466), the electromagnet and the Hall sensing element are disposed outside the motor body, and are covered by the motor cover, however Such an approach requires more cost of the motor cover. In addition, since the electromagnet is sleeved on the rotating shaft of the motor and rotates with the rotor of the motor, when the stability of the electromagnet is set to be sufficient, it is easy to As the motor rotor rotates, eccentricity or axial displacement occurs due to sway, thereby affecting the sensing effect of the Hall sensing element. [Summary of the Invention] + « · · Γ #风-樘 before solving" DC brushless motor, and the DC brushless motor is used as a hub motor. Therefore, the hub motor of the present invention is provided in a wheel frame, which is compared with the motor package 3 - a single unit, a rotor unit, a sensing circuit unit and a magnetic ring. The rotor unit is formed with a shaft portion that is rotatably coupled to the stator unit. The sensing circuit unit includes a circuit board disposed on the stator unit and a plurality of sensing elements disposed on the circuit board. The magnetic ring is disposed around the shaft portion and is fixed to the rotor unit and includes a first ring piece extending radially and axially spaced corresponding to the sensing element, and a second ring extending axially connecting the first ring piece The sheet has a complex number of poles. 201208236 The invention has the effect that the magnetic ring can be stably fixed to the rotor unit by the structural design of the magnetic ring, and the problem that the magnetic ring is eccentrically rotated during the rotation of the rotor unit is avoided. The magnetic ring is disposed between the rotor unit and the stator unit and is covered by the two, and the structure stability of the magnetic ring combined with the rotor unit is increased to resist the centrifugal force generated by the high-speed rotation. The arrangement of the outer cover member can be omitted, and the magnetic ring can be prevented from external pollution or interference. The above and other technical contents, features, and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments. Referring to Figures 1 and 2, a preferred embodiment of the present invention is provided for a wheel frame 101 of an electric motor vehicle. The hub motor 1 includes a rotor unit 1 and a rotor unit 1 The magnetic ring 2, the fixed subunit 3, the sensing circuit unit 4 disposed in the stator unit 3, the plurality of bearings 51, 52, and a rotor unit mount 6. Referring to FIGS. 1 to 3, the rotor unit 1 is formed with a shaft portion, and the shaft portion is rotatably coupled to the stator unit 3. In more detail, the rotor unit 1 includes a rotor housing 11, a rotor output shaft 12, and The plurality of magnets 114, the rotor casing 11 includes a base wall 111 and a surrounding wall 112 extending from the base wall η. The base wall 111 cooperates with the surrounding wall 112 to define an internal space 110, and the base wall 111 defines a communicating internal space. The shaft holes 113 of the crucibles are disposed on the inner wall surface surrounding the wall 112. The rotor output shaft 12 includes a shaft 121 and a shaft 121 outward. 201208236
徑向凸出的凸緣部122，凸緣部122鄰近軸桿121的一端， 凸緣部122位於軸桿121凸出的一側凹陷形成有一圍繞軸 桿121的環形槽123，且環型槽123具有一間隔面向軸桿 121的内周面125，凸緣部122更具有一位於軸桿ΐ2ι凸出 的侧並且圍繞環形槽123的局部表面124，且環型槽123 的内周面125與局部表φ 124呈直角連接。轉子輸出轴12 疋藉其軸桿121由轉子外殼u的軸孔113伸入内部空間 U〇中而軸桿121界定出前述的軸部，凸緣部122則固定在 轉子外殼11的基壁U1❼與轉子外殼U结合。而相結合的 轉子外殼11與轉子輸出軸12則是藉由轉子輸出& 12的凸 緣部122固^在轉子單^固定座6，再透過轉子單元固定座 6固定在輪框101，而電動機車的前叉懸臂（圖未示）是藉 由穿過轉子單元m定座6而與轉子輸出軸12連接。 軸承51、52是套設在軸桿121而位在圍繞壁ιΐ2所圍 繞界定出的内部空Μ 11〇 β，其中一軸承51鄰近 軸12的凸緣部122，另一軸承52鄰近轴桿ΐ2ι的另—端。 磁環2套設在轉子輸出軸12，更詳細的說’磁環2包 括-徑向延伸的第-環片21以及一連接第一環片Μ内緣 並且呈軸向延伸的第二環片22，第—環片Μ可藉由充磁使 其具有複數極數（例如6極、8極甚至到達％極等 磁環2是藉其第二環片22伸人凸緣部⑵的環形槽123 並且貼附在環型槽123的内周面⑵，而第一環片 於凸緣部122的届邱矣工10/1 τ 。表面124而設置固定在轉子輸出軸 12，磁環2的第一環片命铱 片21與第一環片22可分別藉由黏膠 201208236 貼附固定在局部表面124與内周面125。 定子單元3包括一定子固定座31以及一結合在定子固 定座31的矽鋼片組32，本實施例的定子固定座31大致呈 中空圓筒狀而形成有一軸向貫穿的内軸孔311以及一端緣 312，定子固定座31是以其端緣312朝向轉子輸出軸12的 凸緣部122並且藉其内軸孔311套設在該等軸承51、52而 透過軸承51、52間接套設在轉子輸出軸12的軸桿121 外，因而部份伸入轉子外殼u的内部空間n〇中，而矽鋼 片組32則是套設在定子固定座31外並且同樣位在内部空 間110中。 當轉子單元1與定子單元3結合時，藉助位在轉子外 殼11圍繞壁112内壁面的磁鐵114與石夕鋼片組”之間的磁 吸力量’使轉子單A 1產生一向内抵緊之結合預壓力且 此-磁吸力量將透過轉子外傳達到轉子輸出轴12以及 軸承5卜使轉子輸出軸12、轴承51蚊子單元3緊密結 合，再配合轴承52固定轉子輸出軸12。 、… 本實施例的感測電路單元4包括—電路板41以及複數 設在電路板41的感測Μ (霍爾元件，圖未示），感測電 路早凡4設置以在定子固定座31的端緣312，因 子单疋3結合在轉子單元1 _，感測電路單元4與磁^ 2 破包覆於轉子單元丨與定子單元3 感測電路單“的感測元件在轴向上與磁環2的::環: Μ相對應’當轉子外殼11帶動轉子輸出軸12相對於 固定座31旋轉時，同時也使磁環2相對於感測電路單Γ4 201208236 :轉：進而，感測電路單元4上的感測元件便能藉由感測 第％片21的磁極而得知轉子單元j的旋轉狀態。 值得注意的是，本實施例藉由將磁環2的結構設計成 包括第—環片21與第二環片22的結構，以及第一環片21 貼附在局部表® 12“第二環片22伸人環型槽123並且貼 附在内周面125的結構設置，加強了磁環2結合在轉子單 Ί结構穩定度，並且使第二環片22產生輔助定位的效 果’避免磁環2在隨著轉子輸料u旋轉的過程中產生轴 向位移，此外，當轉子單元i帶動磁環2相對於定子單元3 與感測電路單元4旋轉時，磁環2在旋轉過程中也較不容 易產生偏心而造成感測電路單元4產生感測誤差的問題， 再於磁環2與感測電路單元4都是内藏在轉子單元i 與定子單元3之間而受到轉子單元i與^子單元3的包 覆’因此’磁豸2與感測電路單元4也比較不容易受到外 界>可染或干擾影響，並且，磁環2與感測電路單元4也不 需要另外增設外蓋加以包覆，以，也可節省增設外蓋的 成本。 综上所述，本發明藉由磁環2的結構改良以及其設置 位置的改良，增加磁環2結合在轉子單元丨的結構穩定 度，以抵抗高速旋轉所產生的離心力，不僅可節省另外增 设外蓋的成本，且亦可避免磁環2在隨著轉子單元丨旋轉 的過紅中產生偏心旋轉及軸向位移的問題，故確實能達成 本發明的目的。 惟以上所述者，僅為本發明之較佳實施例而已，當不 201208236 能以此限定本發明實施之範圍，即大凡依本發明申請專利 範圍及發明說明内容所作之簡單的等效變化與修飾，皆仍 屬本發明專利涵蓋之範圍内。 【圖式簡單說明】 圖1是本發明輪轂馬達的一個較佳實施例的立體分解 圖， 圖2是該較佳實施例組裝結合在一輪框的剖視圖；以 及 圖3是圖2的局部放大圖。a radially protruding flange portion 122, the flange portion 122 is adjacent to one end of the shaft 121, and the flange portion 122 is recessed on a side of the shaft 121 to be recessed to form an annular groove 123 surrounding the shaft 121, and the annular groove The 123 has an inner peripheral surface 125 spaced apart from the shaft 121. The flange portion 122 further has a partial surface 124 on the side of the shaft ΐ2ι protruding around the annular groove 123, and the inner peripheral surface 125 of the annular groove 123 is The local table φ 124 is connected at right angles. The rotor output shaft 12 extends from the shaft hole 113 of the rotor casing u into the internal space U〇 by its shaft 121, and the shaft 121 defines the aforementioned shaft portion, and the flange portion 122 is fixed to the base wall U1 of the rotor casing 11 Combined with the rotor housing U. The combined rotor casing 11 and rotor output shaft 12 are fixed to the rotor frame holder 6 by the flange portion 122 of the rotor output & 12, and then fixed to the wheel frame 101 through the rotor unit fixing seat 6, and The front fork cantilever (not shown) of the electric motor vehicle is coupled to the rotor output shaft 12 by passing through the rotor unit m. The bearings 51, 52 are sleeved on the shaft 121 and are located around the inner space 11 〇 β defined around the wall , 2, wherein one bearing 51 is adjacent to the flange portion 122 of the shaft 12 and the other bearing 52 is adjacent to the shaft ΐ 2 ι The other end. The magnetic ring 2 is sleeved on the rotor output shaft 12, and in more detail, the magnetic ring 2 includes a radially extending first ring piece 21 and a second ring piece extending axially extending from the inner edge of the first ring piece 22, the first ring piece can be magnetized to have a complex number of poles (for example, a magnetic pole 2 of 6 poles, 8 poles, or even a pole pole is an annular groove extending from the flange portion (2) by the second loop piece 22 123 is attached to the inner peripheral surface (2) of the annular groove 123, and the first ring piece is fixed to the rotor output shaft 12, the magnetic ring 2 at the end of the flange portion 122. The first ring piece 21 and the first ring piece 22 can be attached to the partial surface 124 and the inner circumferential surface 125 by adhesive 201208236, respectively. The stator unit 3 includes a stator holder 31 and a stator holder. The steel plate set 32 of 31, the stator mount 31 of the present embodiment has a substantially hollow cylindrical shape and is formed with an axially extending inner shaft hole 311 and an end edge 312. The stator mount 31 is output toward the rotor with its end edge 312. The flange portion 122 of the shaft 12 is sleeved on the bearings 51 and 52 by the inner shaft hole 311 and indirectly through the bearings 51 and 52. The shaft 121 of the output shaft 12 is outside, and thus partially protrudes into the inner space n of the rotor casing u, and the silicon steel sheet set 32 is sleeved outside the stator mount 31 and is also positioned in the inner space 110. When the unit 1 is combined with the stator unit 3, the magnet unit 114 located between the inner wall surface of the rotor casing 11 and the inner wall of the wall 112 is used to make the rotor unit A1 produce an inwardly abutting combination. The pressure and the magnetic attraction force are transmitted to the rotor output shaft 12 and the bearing 5 through the rotor, and the rotor output shaft 12 and the bearing 51 mosquito unit 3 are tightly coupled, and the rotor output shaft 12 is fixed by the bearing 52. The sensing circuit unit 4 includes a circuit board 41 and a plurality of sensing electrodes (Hall elements, not shown) provided on the circuit board 41. The sensing circuit is disposed 4 at the end edge 312 of the stator holder 31. The single turn 3 is combined in the rotor unit 1 _, the sensing circuit unit 4 and the magnetic ^ 2 are shrouded in the rotor unit 丨 and the stator unit 3 sense circuit single "the sensing element in the axial direction with the magnetic ring 2:: Ring: Μ corresponds 'When the rotor casing 11 drives the rotor output shaft 1 2 When rotating relative to the fixed seat 31, the magnetic ring 2 is also rotated relative to the sensing circuit unit 4 201208236: Further, the sensing element on the sensing circuit unit 4 can sense the magnetic pole of the %th piece 21 The rotation state of the rotor unit j is known. It is noted that the structure of the magnetic ring 2 is designed to include the structure of the first ring piece 21 and the second ring piece 22, and the first ring piece 21 is attached. Attached to the partial table® 12" the second ring piece 22 extends into the ring groove 123 and is attached to the inner circumferential surface 125, which strengthens the stability of the magnetic ring 2 in the rotor single-turn structure, and makes the second ring piece 22The effect of generating the auxiliary positioning 'avoids the axial displacement of the magnetic ring 2 during the rotation with the rotor feed u, and further, when the rotor unit i drives the magnetic ring 2 to rotate relative to the stator unit 3 and the sensing circuit unit 4 The magnetic ring 2 is less prone to eccentricity during the rotation process, causing the sensing circuit unit 4 to generate a sensing error. The magnetic ring 2 and the sensing circuit unit 4 are both embedded in the rotor unit i and the stator unit. Between the 3 and the rotor unit i and the ^ subunit 3 The magnetic cymbal 2 and the sensing circuit unit 4 are also less susceptible to external influences or interference, and the magnetic ring 2 and the sensing circuit unit 4 do not need to be additionally provided with an outer cover for coating, thereby saving Add the cost of the cover. In summary, the present invention improves the structural stability of the magnetic ring 2 combined with the rotor unit , by the structural improvement of the magnetic ring 2 and the improvement of the installation position thereof, so as to resist the centrifugal force generated by the high-speed rotation, thereby saving additional additions. The cost of the outer cover can also avoid the problem of eccentric rotation and axial displacement of the magnetic ring 2 in the redness of the rotation of the rotor unit, so that the object of the present invention can be achieved. However, the above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited to 201208236, that is, the simple equivalent change of the patent application scope and the description of the invention is Modifications are still within the scope of the invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a preferred embodiment of a hub motor of the present invention, FIG. 2 is a cross-sectional view of the preferred embodiment assembled in a wheel frame; and FIG. 3 is a partial enlarged view of FIG. .
8 201208236 【主要元件符號說明】 100 ···. …輪穀馬達 125…… •内周面 1 ....... …轉子單元 2 ......... •磁環 11…… •…轉子外殼 21........ •第一環片 110… …内部空間 22........ •第二環片 111 .... •…基壁 3 ......... •定子單元 112 ... …·圍繞壁 31........ •定子固定座 113… …·軸孔 311…… •内軸孔 114… •…磁鐵 312…… •端緣 12·.··· •…轉子輸出軸 32........ •矽鋼片組 121… —軸杯 4 ......... •感測電路單元 122… •…凸緣部 41........ •電路板 123… •…環形槽 51 、 52· •轴承 124… •…局部表面 6 ......... •轉子單元固定8 201208236 [Explanation of main component symbols] 100 ···. ...Raninet motor 125... • Inner peripheral surface 1.......Rotor unit 2 ......... • Magnetic ring 11... ... •...Rotor housing 21........ •First ring piece 110...Internal space 22.........Second ring piece 111........Base wall 3 .. . . . • stator unit 112 ... ... surrounding wall 31........ • stator mount 113 ... ... shaft bore 311 ... • inner shaft bore 114... • magnet 312 ...... • End edge 12····· •...Rotor output shaft 32........ •Steel plate group 121...——Axis cup 4 ..... • Sensing circuit unit 122 ... •...Flange part 41........ •Circuit board 123... •...Circular groove 51, 52· • Bearing 124... •...Partial surface 6 ......... •Rotor unit fixing