I316488 九、發明說明： 【發明所屬之技術領域】 本發明疋有關於一種花較’特別是指一種無聲花數。 【先前技術】 圖1顯示習知申請案號第86205033號專利案—種無聲 花轂1，該無聲花轂1安裝於一自行車（圖未示），並包含 一固設於該自行車的心軸11、一穀體單元12、一驅動單元 13以及一離合單元14。 參閱圖1與圖2，該轂體單元12包括一圍繞該心轴u 的轂殼121，以及一固設於該轂殼121内周面並具有一受擎 面123的摩擦套筒122。該驅動單元13可旋轉地安裝於該 心軸11上，並包括一輸入段131及一具有一外螺紋部133 的驅動段132。 該離合單元14包括一固定套筒141、一干涉件142以 及一離合套筒143。該固定套筒141套設於該心軸11上， 該干涉件142可旋轉摩擦地套設於該固定套筒141上，竣 離合套筒143螺合於該外螺紋部ip，並具有一嵌卡於該干 涉件I42外的導引槽I44，以及一對應該受掣面的擎勤 面 145。 當該驅動單元13朝一第一方向a旋轉時，該離合套筒 143因該干涉件142之導引，會被該驅動單元13帶動朝該 摩擦套筒122直線螺進，直到該掣動面145嚙合該受掣面 123，使該轂殼121被連動。 . 當該驅動單元13朝一第二方向b旋轉時，該離合套筒 5 1316488 143被直線螺退而脫離該摩擦 & 連動。告哕雜人太铕^ 使篇轂戒121解除 時，:= 住該干涉件142而無法再後退 時該離合套筒143開始隨㈣動單元13空# 干涉件142相對該固定套筒141摩擦旋轉。 " 該無聲花穀i雖然可以達到無聲驅動的 有以下缺失： 疋仍 一、 該無聲花轂i新出廠時，該干涉件142為新品， 因此與該固定套筒141間的滑動摩擦力較大，使用者在帶 動該驅動單元13朝該第二方向B旋轉時會覺得阻力較大， 且會發出噪音，具有空轉阻力與噪音較大的缺失。 二、 當該無聲花轂1使用久了，該干涉件142因為磨 耗而與該固定套筒141間的摩擦力變小了，使用者在帶動 該驅動單元13朝該第一方向A旋轉時，該離合套筒143不 易維持直線前進’甚至可能造成使用者踩空，具有驅動反 應不佳的缺失。 三、 該干涉件142因大面積與該固定套筒14ι產生摩 擦’因此容易摩耗損壞，導致有使用壽命較短的缺失。 【發明内容】 因此’本發明之目的，即在提供一種可以降低空轉阻 力與噪音、驅動反應較佳且能提高使用壽命的無聲花轂。 於是，本發明無聲花轂是包含一心軸、一轂體單元、 —驅動早元以及·一離合单元。 該心軸包括一第一端，以及一相反於該第一端的第二 端。該轂體單元是可旋轉地安裝於該心軸上，並包括一圍 1316488 繞该心軸的轂殼’以及一固設於該轂殼内周面的摩擦套筒 ，該摩擦套筒具有一由該第一端朝第二端漸次縮徑的受掣 面。 S亥驅動單元可相對該心軸沿一第一方向與一相反該第 一方向的第二方向旋轉地安裝於該心軸上，並包括一位在 、 该轂殼外側的輸入段及一位於該轂殼與該心轴之間的驅動 ' 段，該驅動段具有一外螺紋部。 • 該離合單元包括一離合套筒、至少一干涉珠以及一彈 性件組。該離合套筒設置於該轂殼内圍繞該心軸，並具有 一螺合於該驅動段的外螺紋部的被驅動段及一延伸段。該 被驅動段具有一呈錐面狀且對應該受掣面的掣動面，該延 伸段具有至少一容置孔。該干涉珠置於該容置孔中，該彈 性件組設置於該延伸段，並恆頂推該干涉珠抵住該心軸。 當該驅動單元朝該第一方向旋轉時，利用該干涉珠對 該心軸摩擦干涉，該離合套筒會朝該摩擦套筒靠近，直到 • 該掣動面嚙合該受掣面，使該轂殼被連動，當該驅動單元 朝該第二方向旋轉時，該離合套筒會脫離該摩擦套筒，使 該較殼解除連動。 本發明無聲花轂是以該干涉珠抵住該心軸產生的干涉 力，使得該離合套筒相對該驅動單元旋轉，此種方式可以 降低該無聲花轂空轉阻力與噪音、使驅動反應較佳且提高 使用壽命。 【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 1316488 以下配合參考圖式之三個較佳實施例的詳細說明中，將可 清楚的呈現。 在本發明被詳細描述之前，要注意的是，在以下的說 明内容中，類似的元件是以相同的編號來表示。 參閱圖3、圖4、圖5,本發明無聲花轂之第一較佳實 施例包含一心軸單元2、一轂體單元3、一驅動單元4以及 一離合單元5。I316488 IX. DESCRIPTION OF THE INVENTION: TECHNICAL FIELD OF THE INVENTION The present invention relates to a flower comparison, particularly to a silent flower number. [Prior Art] FIG. 1 shows a patent application No. 86205033, a silent flower hub 1 mounted on a bicycle (not shown) and including a mandrel fixed to the bicycle. 11. A cell unit 12, a drive unit 13, and a clutch unit 14. Referring to Figures 1 and 2, the hub unit 12 includes a hub shell 121 surrounding the mandrel u, and a friction sleeve 122 secured to the inner peripheral surface of the hub shell 121 and having a face 123. The drive unit 13 is rotatably mounted on the mandrel 11 and includes an input section 131 and a drive section 132 having an externally threaded portion 133. The clutch unit 14 includes a fixed sleeve 141, an interference member 142, and a clutch sleeve 143. The fixing sleeve 141 is sleeved on the mandrel 11 , and the interference member 142 is rotatably frictionally sleeved on the fixing sleeve 141 , and the clutch sleeve 143 is screwed to the external thread portion ip and has an embedded A guiding groove I44 which is external to the interference member I42, and a pair of a working surface 145 which should be subjected to a kneading surface. When the driving unit 13 rotates in a first direction a, the clutch sleeve 143 is driven by the driving unit 13 to be linearly screwed toward the friction sleeve 122 by the interference member 142 until the tilting surface 145 The receiving surface 123 is engaged to cause the hub shell 121 to be interlocked. When the drive unit 13 is rotated in a second direction b, the clutch sleeve 5 1316488 143 is linearly retracted away from the friction & When the anchor hub 121 is released, the clutch sleeve 143 starts to move with the (four) moving unit 13 and the interference member 142 rubs against the fixed sleeve 141. Rotate. " The silent flower valley i can achieve the following lack of silent driving: 疋 still one, the silent flower hub i new factory, the interference member 142 is a new product, so the sliding friction between the fixed sleeve 141 When the user drives the driving unit 13 to rotate in the second direction B, the user feels that the resistance is large, and noise is generated, and there is a lack of idling resistance and noise. 2. When the silent flower hub 1 is used for a long time, the frictional force between the interference member 142 and the fixing sleeve 141 is reduced due to wear, and when the user drives the driving unit 13 to rotate in the first direction A, The clutch sleeve 143 is not easy to maintain a straight forward' and may even cause the user to step on the air, with a lack of drive response. 3. The interference member 142 is frictional with the fixed sleeve 14ι due to a large area, so that it is easily damaged by wear, resulting in a short life. SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to provide a silent flower hub which can reduce the idling resistance and noise, drive the reaction better, and improve the service life. Thus, the silent flower hub of the present invention comprises a mandrel, a hub unit, a drive early element and a clutch unit. The mandrel includes a first end and a second end opposite the first end. The hub unit is rotatably mounted on the mandrel and includes a hub shell surrounding the mandrel 1316488 and a friction sleeve fixed to the inner circumferential surface of the hub shell, the friction sleeve having a A receiving surface that is gradually reduced in diameter from the first end toward the second end. The S-hai drive unit is rotatably mounted on the mandrel with respect to the mandrel in a first direction and a second direction opposite the first direction, and includes an input section on the outside of the hub shell and a a drive 'section between the hub shell and the mandrel, the drive section having an externally threaded portion. • The clutch unit includes a clutch sleeve, at least one interference bead, and a resilient member set. The clutch sleeve is disposed within the hub shell about the mandrel and has a driven section and an extension section that are threaded to the externally threaded portion of the drive section. The driven section has a tapered surface that is corresponding to the raking surface, and the extension has at least one accommodating hole. The interference beads are placed in the receiving hole, and the elastic member group is disposed on the extending portion, and the interference beads are constantly pushed against the mandrel. When the driving unit rotates in the first direction, the interference hole is used to frictionally interfere with the mandrel, and the clutch sleeve is approached toward the friction sleeve until the protruding surface engages the receiving surface to make the hub The shell is interlocked, and when the driving unit rotates in the second direction, the clutch sleeve is disengaged from the friction sleeve, and the shell is uncoupled. The silent flower hub of the present invention is an interference force generated by the interference bead against the mandrel, so that the clutch sleeve rotates relative to the driving unit, which can reduce the idle resistance and noise of the silent flower hub, and make the driving reaction better. And increase the service life. 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 of FIG. Before the present invention is described in detail, it is noted that in the following description, similar elements are denoted by the same reference numerals. Referring to Figures 3, 4 and 5, a first preferred embodiment of the silent flower hub of the present invention comprises a spindle unit 2, a hub unit 3, a drive unit 4 and a clutch unit 5.
該心軸單元2包括一心軸20，該心軸20包括一第一端 21、一相反於該第一端21的第二端22、一介於該第一、二 端21、22之間的干涉段23、一介於該干涉段23與該第一 端21之間且徑寬大於該干涉段23的擋止段24，以及一介 於該干涉段23與該擋止段24之間的擋緣25。 該轂體單元3是可旋轉地安裝於該心軸2〇上，並包括 一圍繞该心軸20的轂殼31、一固設於該較殼3 1内周面白 摩擦套筒32、一套設於該心軸2〇上的第一軸承33，以^ 一套設於該驅動單元4上的第二軸承34。該轂殼31二端$ 別套設於該第一、二軸承33、34上，該摩擦套筒32具习 一由該第一端21朝第二端22漸次縮徑的受掣面321。 該驅動單元4可相對該心車由20沿H向C與一^ 反。亥第#向C的第二方向〇旋轉地安裝於該心轴2〇上 並包括-位在該較殼31外側的輸人段4ι…位於該⑽ 與該心軸20之間的驅動段42，及一套設於該心軸2〇 _ 的驅動柏承4 3。該輪入於/ & 41及驅動段42是一體成型，j 該輸入段41具有_依 。仏向朝外一體延伸的齒盤411，該季 1316488 入段41套設於該驅動軸承43上，該驅動段42供該第二軸 承34套设，且具有一外螺紋部421。The mandrel unit 2 includes a mandrel 20 including a first end 21, a second end 22 opposite the first end 21, and an interference between the first and second ends 21, 22. a segment 23, a stop segment 24 between the interference segment 23 and the first end 21 and having a larger diameter than the interference segment 23, and a retaining edge 25 between the interference segment 23 and the stop segment 24 . The hub unit 3 is rotatably mounted on the mandrel 2, and includes a hub shell 31 surrounding the mandrel 20, a white friction sleeve 32 fixed to the inner peripheral surface of the shell 31, and a set. A first bearing 33 disposed on the spindle 2A is provided with a second bearing 34 disposed on the driving unit 4. The two ends of the hub shell 31 are sleeved on the first and second bearings 33, 34. The friction sleeve 32 has a receiving surface 321 which is gradually reduced in diameter from the first end 21 toward the second end 22. The drive unit 4 can be reversed from H to C with respect to the car. The second direction of the C is mounted on the mandrel 2 in a second direction of C and includes an input section 4ι located outside the shell 31. The driving section 42 between the (10) and the mandrel 20 , and a set of drives on the mandrel 2〇_ drive Bai Cheng 4 3 . The wheel is inserted into / & 41 and the drive section 42 is integrally formed, and the input section 41 has _. The toothed disc 411 extending integrally toward the outer side is sleeved on the driving bearing 43 of the season 1316488. The driving section 42 is sleeved by the second bearing 34 and has an external thread portion 421.
該離合單元5包括一離合套筒51、二顆干涉珠52以及 一彈性件組53。該離合套筒51設置於該轂殼31内圍繞該 心轴20，並具有一螺合於該驅動段42的外螺紋部421的被 驅動段511，及一對應該心軸2〇干涉段23的延伸段512 ^ 該被驅動段511具有一呈錐面狀且對應該受掣面321的掣動 面513 °亥延伸段512具有二個自該延伸段5丨2 —外周面沿 徑向延伸至一内周面的容置孔514。該等干涉珠52分別置 於該容置？L 514巾’該等容置孔514内端的孔徑皆小於該 等干涉珠52的徑寬。 該彈性件組53具有一套設於該延伸段512鄰近該容置 孔514 —端的套環部531，以及二片自該套環部53ι沿軸向 朝該心軸20傾斜延伸的推抵彈片532,該等推抵彈片η] 分別怪頂推該等干涉珠52抵住該心軸2〇。 當該驅動單元4朝該第-方向C旋轉時，該離合套筒$ 洲該干涉珠52對該，20滾動摩擦干涉（如圖4中°實 線箭頭所示），會被該驅動單元4帶動朝該摩擦套筒Μ直 線螺進，直到該擎動面513嚙合該受掣面321，使該轂殼 虽3亥驅動單元4朝該第 % π町，琢離合套筒 51利用該干涉珠52對該心軸20滾動摩擦干涉（如圖5中 虛線箭頭所示），該離合套筒51會被該驅動單元4帶動直 線螺退，並脫離該摩擦套筒32,使該轂殼31解除連動。此 9 1316488 時’該離合套筒51可朝該心轴20的第一端21後退，直到 乂珠52 $該擋緣25限位’而使該離合套筒51無法再 更1該摩擦套筒32，因此該離合套筒51開始隨該驅動單 70 4工轉’並帶動該干涉珠52環繞該心軸2G外周面 (如圖5中實線箭頭所示）。 本發明無聲花轂不但可以達到無聲驅動的功能，還具 有以下功效： 八 一、 即使該無聲花轂新出廠’該干涉珠52會在心軸20 上滾動摩擦，而不是以大面積滑動摩擦的方式來產生干涉 力’因此使用者在帶動該驅動單元4朝該第二方向〇旋轉 π I1力車乂小，並且較為安靜，因此達到降低空轉阻力與噪 音的功效。 二、 因該離合套筒51位於限位點時，該等干涉珠52 的摩擦阻力沒有增Α，即使該無聲花穀使用—段時間後， 該等干涉珠52的干涉力也不會降低。當使用者在帶動該驅 動單元4朝該第一方向c旋轉時，該離合套筒51仍會與該 驅動單元4產生相對直線運動，使該掣動面513嚙合該受 掣面321，因此達到保持驅動反應良好功效。 二、該干涉珠52在該心轴20外周面滾動，其接觸面 積較小，且珠體的硬度高，不易磨耗而造成損壞，達到使 用哥命較長的功效。 參閱圖6與圖7，本發明無聲花轂之第二較佳實施例大 致與該第一較佳實施例相同，其不同處在於該心軸單元2 還包括一形成於該心轴20外的擋環26，及多數個可滾動地 10 1316488 嵌於該擋環26與該延伸段512間的擋珠27。該離合單元5 的容置孔5H與干涉珠52的數目為三，該離合單元5還包 括三個螺鎖於該延伸段512並分別塞住該等容置孔514 一 • 夕卜端的固定元件54,及一輔助彈性件55。該辅助彈性件55 二端分職絲體單元3與_合套_ 5卜㈣離合套筒 51常保朝該心轴20的第-端21後退的趨勢，該彈性件址 . 53具有三個壓縮彈簧533 ’每一壓縮彈簧533二端分別推 • 抵該固定元件54與該干涉珠Μ。該延伸段512還具有一嵌 槽515，該嵌槽515形成於該延伸段512鄰近該被驅動段 511的一端，並沿軸向朝該心軸2〇的第一端21延伸，且供 該被驅動段5 11緊配合後入。 當該驅動單元4朝該第二方向D旋轉時，該離合套筒 51會脫離該摩擦套筒32,該離合套筒51可朝該心軸2〇的 第一端21後退，直到該延伸段512推抵該等擋珠27緊靠 該擋環26為止’此時，該離合套筒51會開始隨該驅動單 • 元4空轉，並帶動該等干涉珠52環繞該心軸2〇外周面旋 轉，且該等擋珠27會同時相對該延伸段512與該擋環％ 旋轉，藉此，同樣可以達到上述第一較佳實施例的功效。 參閱圖8,本發明無聲花轂之第三較佳實施例大致與該 第一較佳實施例相同，其不同處在於該心軸單元2以一銅 材質製成的耐磨環28取代該等擋珠27 (如圖6所示），該 耐磨環28可旋轉地套設於該心軸2〇外。當該驅動單元4 朝該第二方向D旋轉時，該離合套筒51會脫離該摩擦套筒 32，該離合套筒51可朝該心軸2〇的第一端21後退，直到 11 1316488 該延伸段512推抵該耐磨環28緊靠該擋環26為止，此時 該離合套筒51會開始隨該驅動單元4空轉，並帶動該等 干涉珠52環繞該心軸20外周面旋轉，且該耐磨環28會同 守相對該延伸段512與該擋環26旋轉，藉此，同樣可以達 到上述的功效。 值得提的是’在節省成本的考量上’也可以將該干 . 涉珠52、推抵彈片532 '容置孔514、壓縮彈簧533數目皆 • 減少為一個，就足以達到上述的功效。 又上述實施例中，該擋環20是與該心軸20分別製作 ，再套固在一起，也可以直接在該心轴2〇上一體車削出該 擋環26。 惟以上所述者，僅為本發明之較佳實施例而已，當不 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是一剖視圖，說明習知一種無聲花轂的_驅動單 元朝一第一方向旋轉； 圖2是一類似圖1的視圖，說明該驅動單元朝—第二 方向旋轉； 圖3是一剖視圖，說明該本發明無聲花轂的—第一較 佳實施例； 圖4是該第一較佳實施例的一放大剖視圖，說明一驅 動單元朝一第一方向旋轉； 12 1316488 圖5是一類似圖4的視圖，說明該驅動單元朝一第二 方向旋轉； 圖6是一剖視圖，說明本發明無聲花轂的一第二較佳 實施例； 圖7是一剖視圖，說明三個壓縮彈簧分別與三個固定 元件和三顆干涉珠的推抵情形；及 圖8是一剖視圖，說明本發明無聲花轂的一第三較佳 實施例。The clutch unit 5 includes a clutch sleeve 51, two interference beads 52, and an elastic member set 53. The clutch sleeve 51 is disposed in the hub shell 31 around the mandrel 20, and has a driven section 511 screwed to the external thread portion 421 of the driving section 42 and a pair of accentric shaft 2 〇 interference section 23 The extended section 512 ^ has a tapered surface and corresponds to the flank surface 321 of the flank 513. The extension 512 has two extensions from the extension 5 丨 2 - the outer circumferential surface extends radially The receiving hole 514 is formed to the inner circumferential surface. The interference beads 52 are respectively placed in the accommodation? The apertures at the inner ends of the accommodating holes 514 are smaller than the diameters of the interference beads 52. The elastic member set 53 has a sleeve portion 531 disposed at the end of the extending portion 512 adjacent to the receiving hole 514, and two pieces of the pushing elastic piece extending obliquely from the sleeve portion 531 toward the mandrel 20 in the axial direction. 532. The pushing protrusions η] respectively push the interference beads 52 against the mandrel 2〇. When the driving unit 4 rotates toward the first direction C, the clutch sleeves 52, the interference beads 52, 20 rolling friction interference (as indicated by the solid arrows in FIG. 4), will be driven by the driving unit 4. Driving the screw sleeve to the friction sleeve, until the bearing surface 513 engages the receiving surface 321 so that the hub shell faces the π π, the 琢 clutch sleeve 51 utilizes the interference beads The rolling friction interference of the mandrel 20 (as indicated by the dashed arrow in FIG. 5), the clutch sleeve 51 is linearly retracted by the driving unit 4, and is disengaged from the friction sleeve 32 to release the hub shell 31. Gearing. At 9 1316488, the clutch sleeve 51 can be retracted toward the first end 21 of the mandrel 20 until the bead 52 is restrained by the bead 25, so that the clutch sleeve 51 can no longer be more than the friction sleeve. 32. Therefore, the clutch sleeve 51 begins to rotate with the drive unit 70 and drives the interference beads 52 around the outer peripheral surface of the spindle 2G (as indicated by the solid arrows in FIG. 5). The silent flower hub of the invention can not only achieve the function of silent driving, but also has the following effects: Bayi, even if the silent flower hub is newly manufactured, the interference beads 52 will roll and rub on the mandrel 20 instead of sliding in a large area. In order to generate the interference force, the user drives the driving unit 4 to rotate the π I1 in the second direction, and the vehicle is small, and is relatively quiet, thereby achieving the effect of reducing the idling resistance and noise. 2. When the clutch sleeve 51 is at the limit point, the frictional resistance of the interference beads 52 is not increased, and even if the silent flower valley is used for a period of time, the interference force of the interference beads 52 does not decrease. When the user drives the driving unit 4 to rotate in the first direction c, the clutch sleeve 51 still has a relative linear motion with the driving unit 4, so that the tilting surface 513 engages the receiving surface 321 Maintain a good driving response. 2. The interference bead 52 rolls on the outer peripheral surface of the mandrel 20, and the contact area is small, and the hardness of the bead is high, which is not easy to be worn and causes damage, and the effect of using the scorpion is long. Referring to FIGS. 6 and 7, a second preferred embodiment of the silent flower hub of the present invention is substantially the same as the first preferred embodiment, except that the spindle unit 2 further includes a core tube 20 formed outside the spindle 20 A retaining ring 26, and a plurality of ballasts 27 that are rollably 10 1316488 embedded between the retaining ring 26 and the extension 512. The number of the accommodating holes 5H and the interference beads 52 of the clutch unit 5 is three, and the clutch unit 5 further includes three fixing members that are screwed to the extending portion 512 and respectively plug the accommodating holes 514. 54, and an auxiliary elastic member 55. The auxiliary elastic member 55 has a tendency to retreat toward the first end 21 of the mandrel 20, and the elastic member. 53 has three compressions. Springs 533' each of the compression springs 533 push against the fixed element 54 and the interference beads, respectively. The extension 512 further has a recess 515 formed at an end of the extended section 512 adjacent to the driven section 511 and extending axially toward the first end 21 of the spindle 2〇 for The driven segment 5 11 is tightly fitted and then inserted. When the driving unit 4 rotates in the second direction D, the clutch sleeve 51 will be disengaged from the friction sleeve 32, and the clutch sleeve 51 can be retracted toward the first end 21 of the spindle 2〇 until the extension 512 pushes the ball 27 against the retaining ring 26. At this time, the clutch sleeve 51 starts to idle with the driving unit 4, and drives the interference beads 52 around the outer circumference of the mandrel 2 Rotating, and the beads 27 are simultaneously rotated relative to the extension 512 and the retaining ring, whereby the efficacy of the first preferred embodiment described above can also be achieved. Referring to Figure 8, the third preferred embodiment of the silent flower hub of the present invention is substantially the same as the first preferred embodiment, except that the spindle unit 2 is replaced by a wear ring 28 made of a copper material. A bead 27 (shown in Figure 6), the wear ring 28 is rotatably sleeved outside the mandrel 2 . When the driving unit 4 rotates in the second direction D, the clutch sleeve 51 will be disengaged from the friction sleeve 32, and the clutch sleeve 51 can be retracted toward the first end 21 of the spindle 2〇 until 11 1316488 The extending portion 512 is pushed against the retaining ring 28 to abut against the retaining ring 26. At this time, the clutch sleeve 51 starts to idle with the driving unit 4, and drives the interference beads 52 to rotate around the outer peripheral surface of the spindle 20, Moreover, the wear ring 28 will rotate relative to the extension 512 and the retaining ring 26, thereby achieving the above-mentioned effects. It is worth mentioning that 'in terms of cost savings', it is also possible to reduce the number of the beads 52, the number of the snaps 532 'receiving holes 514, and the number of compression springs 533 to one, which is sufficient to achieve the above effects. In the above embodiment, the retaining ring 20 is separately formed from the mandrel 20 and then sleeved together, and the retaining ring 26 can be integrally turned on the mandrel 2〇. The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing a conventional unidirectional driving unit of a silent flower hub rotating in a first direction; FIG. 2 is a view similar to FIG. 1 illustrating the driving unit rotating in a second direction. Figure 3 is a cross-sectional view showing the first preferred embodiment of the silent flower hub of the present invention; Figure 4 is an enlarged cross-sectional view of the first preferred embodiment illustrating a driving unit rotating in a first direction; 12 1316488 Figure 5 is a view similar to Figure 4, showing the drive unit rotated in a second direction; Figure 6 is a cross-sectional view showing a second preferred embodiment of the silent flower hub of the present invention; Figure 7 is a cross-sectional view showing three The compression spring is respectively pushed against the three fixing elements and the three interference beads; and FIG. 8 is a cross-sectional view showing a third preferred embodiment of the silent flower hub of the present invention.
13 131648813 1316488
【主要元件符號說明】 2…… •…心軸單元 42…… •…驅動段 20•…· .....Ci軸 421… •…外螺紋部 21 ···· …·第一端 43…… •…驅動軸承 22-···· •…第二端 5 ....... …·離合單元 23·...· •…干涉段 51…… •…離合套筒 24••… •…擋止段 511… •…被驅動段 25····. …·擋緣 512… •…延伸段 26 •… •…擋環 513… —擎動面 27…·· …·擋珠 514… •…容置孔 28••… …·耐磨環 515… —肷槽 3…… …·轂體單元 52··· •…干涉珠 31 ··.· ···轂殼 53·...· •…彈性件組 32-·… •…摩擦套筒 531… -…套環部 321 ··· •…受掣面 532… •…推抵彈片 33••… —第 軸承 533… •…壓縮彈簧 34••… •…第二軸承 54··... •…固定元件 4…… •…驅動單元 55… •…輔助彈性件 41 ·…· •…輸入段 C…… •…第一方向 411 ·· …·齒盤 D…… •…第二方向 14[Description of main component symbols] 2... •... spindle unit 42... •...drive section 20•...·....Ci axis 421... •...external threaded section 21······first end 43 ...... •...Drive bearing 22-····•...2nd end 5..................Clutch unit 23·...·•...Interference section 51... •...Clutch sleeve 24•• ... •...stop section 511... •...driven section 25····..... retaining edge 512... •...extension section 26 •... •... retaining ring 513... —lifting surface 27...····Block 514... •... accommodating hole 28••...·wear ring 515... 肷 3 3...... ...... hub unit 52··· •... interference beads 31 ······· hub shell 53·. ..·•...elastic member group 32-·...•...friction sleeve 531... -... collar portion 321 ··· •...receiving surface 532... •...pushing to the elastic piece 33••...—the first bearing 533... ...compression spring 34••... •...second bearing 54··...•...fixing element 4...•...drive unit 55...•...auxiliary elastic member 41 ·...· •...input section C... •... One direction 411 ····Toothed disk D ... • ... second direction 14