M352464 八、新型說明： 【新型所屬之技術領域】 本新型是有關於一種自行車，特別是指一種安裝於後 叉的皮帶傳動花轂。 【先前技術】 如圖1所示，現有一種較常見的花轂，是將可供安裝 飛輪（圖未示）的齒輪座1及一剎車碟盤2分別設置在一 殼體3的兩側，且因飛輪與剎車碟盤2分置兩邊，故二者 的尺寸互不影響，對於用以連動該齒輪座丨與該殼體3的 一離合單元Γ的尺寸、結構設計，也無較多限制。 再如圖2所示，現有一種皮帶傳動花轂，是安裝一單 臂式後叉4上，並包含一心軸單元5、一轴設於該心軸單元 5的殼體6、一安裝於該殼體6的剎車碟盤7、一設於該殼 體6 —側的飛輪8及一設於該飛輪8内部且提供該殼體6 與該飛輪8產生單向連動的離合單元9。該殼體6具有一鄰 近該飛輪8的固定部601 ’可供該剎車碟盤7的一内孔701 嵌固定位。 這種花穀受限於該剎車碟盤7之内孔701尺寸較小， 所以無法在該殼體3内部設置尺寸小、結構堅固的棘輪機 構，且只能將該離合單元9設置在該殼體6外側的飛輪8 内部，亦即，該離合單元9對應於一軸線L的咬合點p與 該殼體6的二輻條安裝部602之間有一較大的距離，此距 離將會造成該殼體6受該飛輪8帶動時產生晃動。 【新型内容】 5 M352464 因此’本新型之目的’即在提供—種可確實連動且減 少晃動之皮帶傳動花轂。 於是，本新型之皮帶傳動花轂，適宜安裝於一後叉上 ’並包含一心軸單元、一軸設於該心軸單元的殼體、一安 裝於該殼體的剎車碟盤、一設於該殼體—側的飛輪及一設 於該设體與該飛輪間的離合單元。該心轴單元是安穿在兮 ，又上，且沿一軸線延伸。該殼體是呈可旋轉地被該心軸 單元所支撐，並具有一圍繞該軸線的周壁、凸設在該周壁 的一第一、二輻條安裝部及一設於該第一輻條安裝部外側 的固定部，該周壁具有一對應於該固定部的凹孔及多數圍 繞該凹孔而設的套合部。該剎車碟盤具有—固設在該固定 苦二内型孔’該内型孔的内徑大於該凹孔的内徑。該飛輪 是呈可旋轉地被該心軸單元所支撐且介於該剎車碟盤與該 後又之間，並具有一與該凹孔相對的凹槽。該離合單元具 有-固設在該飛輪之凹槽中的固定件、—可沿軸線在該凹 孔中產生滑動的滑動件及一提供該滑動#‘良朝該固定件產 生靠合的彈性元件，該固^件具有—垂直於該軸線的第一 端面及多數圍繞該軸線且設於該第一端面的第一卡齒，該 滑動件具有一垂直於該軸線且與該第一端面相對的第二端 面、多數圍繞該軸線且設於該第二端面的第二卡齒、一由 該第二端面沿軸向延伸的外環面及多數設於該外環面且盥 該等套合部互相㈣的嵌卡部，該第―、二卡齒呈單㈣ 合0 藉此，利用該離合單元設置在該般體與該飛輪之間可 M352464 達到確實連動之目的，且該離合單元設置位置趨近於該第 一、二輻條安裝部，則可避免花轂運轉時產生晃動。 【實施方式】 有關本新型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。 如圖3及圖4所示，本新型皮帶傳動花轂的較佳實施 例，適宜贪裝於一後叉1 00 (本實施例的後又可為單臂式後 叉），並包含一安裝在該後叉100上的心軸單元10、一軸設 於該心轴單元10的殼體20、一安裝於該殼體20的剎車碟 盤30、一 s免於該殼體20 —侧的飛輪4〇及一設於該殼體2〇 與該飛輪40間的離合單元5〇。 該心軸單元10具有一沿一軸線L延伸的軸桿1丨及多 數組設在該軸桿11上的軸承12。 該设體20是呈可旋轉地被該心軸單元1〇所支撐，並 具有一圍繞該軸線L並可界定出一内孔21的周壁22、凸設 在該周壁22的一第一、二輻條安裝部23、24及一介於該 第一輻條安裝部23外側的固定部25。該周壁22具有一對 應於該固定部25且與該内孔21呈階級相通的凹孔221及 多數圍繞在s玄凹孔221外部的套合部222，該等套合部222 呈圓孤凹槽狀’該固定部25具有多數沿軸向設置且圍設在 該凹孔221外部的鎖孔251。 *亥术彳車碟盤30具有一對應該凹孔221的内型孔3 1及 多數圍設在該内型孔31外部且對應於該等鎖孔251的穿孔 7 M3 52464 32，該内型孔3i的内徑大於該凹孔221的内徑，也大於由 該等套合部222所形成的圓徑。且該剎車碟盤3〇是利用多 數螺絲33穿過該等穿孔32且螺鎖在該固定部25的鎖孔 251 中。 該飛輪40是以鋁合金材質製成，呈可旋轉地被其中一 軸承12支撐於該心軸單元10上，且介於該剎車碟盤3〇與 該後叉100之間，並具有-主輪體41及二分別以多數螺絲 43鎖固在該主輪體41二側的護蓋42，該主輪體4ι為一皮 帶輪，並具有一與該凹孔221相對的凹槽411及—圍設在 該凹槽411外部且可伸設至該内型孔31中的凸緣化。另 外’該主輪體41亦設有多數圍繞在該凹槽4ιι外部的套合 部413，該等套合部413呈圓弧凹槽狀。 該離合單元50具有一固設在該飛輪4〇之凹槽4ιι中 的固定件51、-可沿軸線L在該凹孔221中產生滑動的滑 動件52及-提供該滑動件52怪朝該固定件51產生靠合的 彈I·生7L件53。該m定件51是以超硬合金鋼材質製成，並且 有-垂直於該轴線L的第一端面511、多數圍繞該軸線U 設於該第-端面511的第一卡齒512、_由該第—端面5ιι 沿軸向延伸的外環面513及多數設於該外環面513且盘該 飛輪40之套合部413互相喪套的嵌卡部514，該等喪卡部 514的截面呈半圓形。該滑動件52的形狀、結構對岸㈣ 固定件Η，也是以超硬合金鋼材質製成，並具有一垂直於 該軸線L且與該第-端面511相對的第二端面521、多數圍 繞該軸線L且設於該第二端面521的第二卡齒522、一由該 M3 52464 第二端面521沿轴向延伸的外環面⑵及多數設於該外環 面523且與該殼體2〇之套合部222呈可滑動地故套的喪卡 部524’該第一、二卡齒512、522均呈單向斜齒且彼此呈 單向喃合’該等嵌卡部524的截面呈半圓形。該彈性元件 53為壓縮彈簧。 再如圖3所示，在正常狀態下，該滑動件52受到該彈 性元件53的彈力作用，可使第二卡齒似與該固定件η 的第一卡齒512互相嚙合，則當該飛輪4〇被驅動時，利用 δ亥離合單疋50的傳遞，即可連動該殼體2〇及剎車碟盤邛 轉動。相反地，當該飛輪4〇被反向驅動而轉動時，該等第 卡ω 512會與5亥等第二卡齒522產生跳脫，且利用彈性 το件53之彈力，使得該等第二卡齒522跳脫後會再隨即與 第一卡齒512保持嚅合。 因此’本新型利用該離合單元50的滑動件52安農在 該殼體20的凹孔221中、該固定件51固設在該飛輪4〇的 凹槽411中，則使得該離合單元5〇的設置位置（即該離合 單7L 50對應於該軸線L的咬合點）趨近於該殼體2〇的第 —、二輻條安裝部23、24，使得飛輪4〇在連動該殼體2〇 轉動時，可避免晃動的產生。 惟以上所述者，僅為本新型之較佳實施例而已，當不 能以此限定本新型實施之範圍，即大凡依本新型申請專利 範圍及新型說明内容所作之簡單的等效變化與修飾，皆仍 屬本新型專利涵蓋之範圍内。 【圖式簡單說明】 M352464 圖1是現有一種花轂之組合剖面圖； 圖2是現有一種皮帶傳動花轂之組合示意圖； 圖3是一組合剖面示意圖，說明本新型皮帶傳動花轂 的一較佳實施例；及 圖4是本新型上述較佳實施例之一部分立體分解圖， 說明一殼體與一離合單元。 10 M352464 【主要元件符號說明】M352464 VIII. New description: [New technical field] The present invention relates to a bicycle, in particular to a belt drive hub mounted on a rear fork. [Prior Art] As shown in Fig. 1, a more common flower hub is provided with a gear base 1 and a brake disc 2 for mounting a flywheel (not shown) on one side of a casing 3, respectively. Moreover, since the flywheel and the brake disc 2 are disposed on two sides, the sizes of the two are not affected by each other, and there is no limitation on the size and structural design of the clutch unit for interlocking the gear base and the housing 3. . As shown in FIG. 2, a conventional belt drive hub is mounted on a single-arm rear fork 4, and includes a spindle unit 5, a housing 6 provided on the spindle unit 5, and a mounting body. A brake disc 7 of the housing 6 , a flywheel 8 disposed on the side of the housing 6 , and a clutch unit 9 disposed inside the flywheel 8 and providing a unidirectional linkage between the housing 6 and the flywheel 8 . The housing 6 has a fixing portion 601' adjacent to the flywheel 8 for inserting and fixing a hole 701 of the brake disc 7. Such a flower valley is limited by the small size of the inner hole 701 of the brake disc 7, so that a small and rigid ratchet mechanism cannot be disposed inside the housing 3, and only the clutch unit 9 can be placed in the shell. The inside of the flywheel 8 outside the body 6, that is, the clutch unit 9 has a large distance between the nip point p corresponding to an axis L and the two-spoke mounting portion 602 of the housing 6, which distance will cause the shell The body 6 is shaken when it is driven by the flywheel 8. [New content] 5 M352464 Therefore, the purpose of the present invention is to provide a belt-driven flower hub that can be reliably linked and reduced in sway. Therefore, the belt drive hub of the present invention is suitably mounted on a rear fork and includes a spindle unit, a housing disposed on the spindle unit, a brake disc mounted to the housing, and a a housing-side flywheel and a clutch unit disposed between the housing and the flywheel. The mandrel unit is worn on the cymbal, on top, and extends along an axis. The housing is rotatably supported by the spindle unit and has a peripheral wall surrounding the axis, a first and two spoke mounting portions protruding from the peripheral wall, and a first spoke mounting portion disposed outside the first spoke mounting portion The fixing portion has a concave hole corresponding to the fixing portion and a plurality of fitting portions surrounding the concave hole. The brake disc has a - fixed in the fixed bitter inner bore - the inner diameter of the inner bore is larger than the inner diameter of the recess. The flywheel is rotatably supported by the spindle unit and interposed between the brake disc and the rear portion and has a recess opposite the recess. The clutch unit has a fixing member fixed in the groove of the flywheel, a sliding member that can slide in the concave hole along the axis, and a spring member that provides the sliding to provide abutment against the fixing member The fixing member has a first end surface perpendicular to the axis and a plurality of first engaging teeth disposed around the axis and disposed on the first end surface, the sliding member having a perpendicular to the axis and opposite to the first end surface a second end surface, a plurality of second latches disposed around the axis and disposed on the second end surface, an outer ring surface extending axially from the second end surface, and a plurality of outer ring faces disposed on the outer ring surface and the sleeve portion In the embedding portion of the (4), the first and second teeth are in a single (four) and 0, whereby the clutch unit is disposed between the body and the flywheel, and the M352464 can be surely linked, and the clutch unit is disposed. Approaching the first and second spoke mounting portions prevents sloshing when the hub is in operation. The above and other technical contents, features and effects of the present invention will be apparent from the following detailed description of the preferred embodiments. As shown in FIG. 3 and FIG. 4, the preferred embodiment of the belt drive hub of the present invention is suitable for a rear fork 100 (which can be a single-arm rear fork in this embodiment) and includes an installation. a spindle unit 10 on the rear fork 100, a housing 20 provided on the spindle unit 10, a brake disc 30 mounted on the housing 20, and a flywheel on the side of the housing 20 4〇 and a clutch unit 5〇 disposed between the housing 2〇 and the flywheel 40. The spindle unit 10 has a shaft 1 延伸 extending along an axis L and a plurality of bearings 12 disposed on the shaft 11. The housing 20 is rotatably supported by the spindle unit 1 , and has a peripheral wall 22 surrounding the axis L and defining an inner hole 21 , and a first and second protruding from the peripheral wall 22 . The spoke mounting portions 23, 24 and a fixing portion 25 interposed outside the first spoke mounting portion 23. The peripheral wall 22 has a concave hole 221 corresponding to the fixing portion 25 and communicating with the inner hole 21, and a plurality of sleeve portions 222 surrounding the outer side of the s-shaped recessed hole 221, and the sleeve portion 222 is round and concave. The groove portion 'the fixing portion 25 has a plurality of lock holes 251 which are disposed in the axial direction and which are disposed outside the recessed holes 221. *Hail brake disc 30 has a pair of inner holes 31 which should be recessed holes 221 and a plurality of perforations 7 M3 52464 32 which are disposed outside the inner hole 31 and correspond to the lock holes 251, the inner type The inner diameter of the hole 3i is larger than the inner diameter of the recess 221, and is larger than the circular diameter formed by the fitting portions 222. And the brake disc 3 is threaded through the perforations 32 by a plurality of screws 33 and screwed into the locking holes 251 of the fixing portion 25. The flywheel 40 is made of an aluminum alloy and is rotatably supported by the bearing 12 on the spindle unit 10, and between the brake disc 3 and the rear fork 100, and has a main The wheel bodies 41 and 2 are respectively locked to the cover 42 on both sides of the main wheel body 41 by a plurality of screws 43. The main wheel body 4 is a pulley and has a groove 411 and a groove opposite to the recess 221 The flange is formed outside the groove 411 and can be extended into the inner hole 31. Further, the main wheel body 41 is also provided with a plurality of sleeve portions 413 which are externally surrounded by the groove 4, and the sleeve portions 413 have a circular groove shape. The clutch unit 50 has a fixing member 51 fixed in the groove 4 ι of the flywheel 4 、, a sliding member 52 capable of sliding in the concave hole 221 along the axis L, and providing the sliding member 52 The fixing member 51 generates a projecting elastic member I. The m stator 51 is made of super hard alloy steel, and has a first end surface 511 perpendicular to the axis L, and a plurality of first latches 512, _ disposed on the first end surface 511 around the axis U. An outer ring surface 513 extending in the axial direction from the first end surface 5 ιι and a plurality of engaging portions 514 disposed on the outer ring surface 513 and the sleeve portion 413 of the flywheel 40 are smothered with each other, and the card portion 514 The cross section is semicircular. The shape of the sliding member 52 and the structure of the opposite side (four) fixing member Η are also made of super hard alloy steel, and have a second end surface 521 perpendicular to the axis L and opposite to the first end surface 511, most of which surround the axis And a second latch 522 disposed on the second end surface 521, an outer annular surface (2) extending in the axial direction from the second end surface 521 of the M3 52464, and a plurality of outer annular surfaces 523 disposed on the outer annular surface 523 and the housing 2 The sleeve portion 222 is a slidable cover portion 524'. The first and second latching teeth 512, 522 are all unidirectionally helical and unidirectionally mate with one another. Semicircular. The elastic member 53 is a compression spring. As shown in FIG. 3, in the normal state, the sliding member 52 is subjected to the elastic force of the elastic member 53, so that the second engaging teeth can be intermeshing with the first engaging teeth 512 of the fixing member n, and then the flywheel When the 4〇 is driven, the transmission of the casing 2 and the brake disc can be rotated by the transmission of the δ-Hui clutch unit 50. Conversely, when the flywheel 4 is rotated by the reverse drive, the first card ω 512 will trip with the second latch 522 such as 5 hai, and the elastic force of the elastic member 53 is used to make the second After the latch 522 is tripped, it will then be engaged with the first latch 512. Therefore, the present invention utilizes the slider 52 of the clutch unit 50 to be immersed in the recess 221 of the housing 20, and the fixing member 51 is fixed in the recess 411 of the flywheel 4〇, so that the clutch unit 5〇 The set position (i.e., the clutch point 7L 50 corresponds to the point of engagement of the axis L) approaches the first and second spoke mounting portions 23, 24 of the housing 2〇 such that the flywheel 4 is interlocked with the housing 2〇. When turning, it can avoid the occurrence of shaking. However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention cannot be limited thereto, that is, the simple equivalent change and modification made by the novel patent application scope and the novel description content, All remain within the scope of this new patent. BRIEF DESCRIPTION OF THE DRAWINGS M352464 Fig. 1 is a sectional view showing a combination of a conventional flower hub; Fig. 2 is a schematic view showing a combination of a conventional belt drive hub; Fig. 3 is a schematic sectional view showing a comparison of the belt drive hub of the present invention A preferred embodiment of the present invention; and FIG. 4 is a partially exploded perspective view of a preferred embodiment of the present invention, illustrating a housing and a clutch unit. 10 M352464 [Main component symbol description]
100… …·後叉 4 0 ^ * * * * …飛輪 1 0 β ® Ϊ* <· s…心軸單元 β 1 t ^ a …‘主輪體 L…… …·轴線 411… * *凹槽 11*··· •…轴桿 412 …: •…凸緣 】2 9 f <· -…轴承 413… …·套合部 2 0 •…殼體 42…… ……護蓋 2 1 "f … 8…内孔 5 0…… '…離合單元 2 2……x …周壁 51--- …·固定件 221 - …;凹孔 511 *·· …·第一端面 222… …套合部 512… •…第—^齒 23 ….· •…第一輕條安裝部 513 ·· …外環面 ^ < 9 ί 9 。…第二輻條安裝部 514 * * …嵌卡部 25 -… ，…固定部 52····- •…滑動件 25卜… …鎖孔 521 — …·第二端面 3 0……。 …剎車碟盤 522… •…第二卡齒 1 *> X 0 Ζ ♦ J …内型孔 5 2 3 …‘ …外環面 …穿孔 524 …, …·後卡部 3 3 * … …螺絲 53…… ……彈性元件 11100... .... rear fork 4 0 ^ * * * * ... flywheel 1 0 β ® Ϊ * <· s... mandrel unit β 1 t ^ a ... 'main wheel body L ... ... axis 411... * * Groove 11*···•...shaft 412 ...: •...flange] 2 9 f <·-...bearing 413... ...the fit portion 2 0 •...housing 42.........cover 2 1 "f ... 8... inner hole 5 0... '...clutch unit 2 2...x ...circle wall 51---...fixing member 221 - ...; recessed hole 511 *·· ...·first end face 222... The joint portion 512...•...the first-toothed tooth 23 ........the first light strip mounting portion 513 ··...outer ring surface^ < 9 ί 9 . ...second spoke mounting portion 514 * * ...embed portion 25 -... ,...fixing portion 52·····•...sliding member 25...locking hole 521 — ...·second end face 3 0 . . . ...brake disc 522... •...second latch 1 *> X 0 Ζ ♦ J ... inner hole 5 2 3 ...' ... outer ring surface...perforation 524 ..., .... rear card portion 3 3 * ... screw 53...... ......Flexible element 11