200938405 九、發明說明： 【發明所屬之技術領域】 本發明係有關於一種花轂棘齒結構，尤指一種裝置於自行車之腳 踏板與車輪間之傳動機構，其利用限位件使棘齒保持常閉狀態，又以 棘齒之凸柱與阻尼件之抵掣孔係以產生位移關係，俾以使車輪反轉時 不會帶動腳踏板，且不會產生噪音。 【先前技術】 習知之自行車上之花較棘齒結構’如第8、9圖所示觀之，其包含 有：一棘齒盤(50)、一花轂(60)及一心軸(70)，一棘齒盤(50)係為一 管狀體，且圓週面上係設有齒盤(51)及棘齒座（52)，該棘齒座（52)之 圓週面上係設有複數個棘齒孔(521)，且係配合設置有複數個棘齒 (53)，棘齒(53)與棘齒孔(52)之間係設置有一彈性件(54)，一花轂(60) 係為一管狀體，其一側係開設有棘齒盤室（61)，且棘齒盤室（61)中設 有一斜齒面（611)，一心軸(70)係為一圓柱體，且前後端係設有外螺 紋，其中段之適當處係凸設一止擋環(71)，該棘齒盤(5〇)、花轂(6〇) 及心軸(70)之間係可設置複數個軸承(72)及定位件(73)，其心轴(7〇) 係以軸承(72)固定於花轂(60)中，該棘齒座(52)係置入花轂(6〇)之棘 齒盤室（61)中。 其實際作動之情況，該棘齒（51)係受彈性件(54)之向外侧推擠， 而常態保持開啟狀並與花轂(6〇)之斜齒面（611)互相抵觸，當轉動棘齒 盤(50)前轉時，該棘齒（51)係抵住該斜齒面（611)，使棘齒盤(5〇)係透 200938405 過棘齒（51)而傳動該花轂(6〇)，又當反轉棘齒（51)時，該棘齒（51)係 受斜齒面（611)與彈性件(54)之作動，而產生擺動作動之效果，而花轂 (60)即不受棘齒（51)之連動，且轉動該花轂(60)前轉時，該棘齒（51) 係不會受花轂(60)所帶動，另反轉該花轂(6〇)時，該棘齒（51)係會反 向受到斜齒面（611)之推動，使棘齒盤(50)產生^^轉。 詳觀上述習知結構不難發覺其尚存有些許不足之處，主要原因係 歸如下： 〇 (一）、當反轉棘齒(51)時，該棘齒（51)係受斜齒面(611)與彈性件(54) 之作動，而產生擺動運動之效果，而花較(6〇)即不受棘齒（η) 之連動，而該擺動過程係會產生磨擦與噪音。 (-）、其轉動該花較⑽)前轉時，該棘齒⑸)係不會受花較⑽)所帶 動’另反轉該花較(60)時，該棘齒⑸)係會反向受到斜齒面⑽) 之推動’使軸盤(5〇)產生反轉，而缝⑼)係帶職腳踏板， 使腳踏板㈣行車後退時產生轉動，該不必要之轉動係容易誤 © 傷使用者。 有鑑於此，本發明人於多年從事相關產品之製造開發與設計經 驗’針對上述之目標，詳加設計與審慎評估後，終得—確具實用性之 本發明。 【發明内容】 欲解決之技術問題點： 習知之花轂結構，當自行車後退時，其腳踏板係會同步轉動，使 200938405 得牵動該自行車之使財料姻前，又該佩與斜齒面係保持抵 觸狀，使得當花較與棘齒盤無互相帶動時，即產生磨擦與噪音，此乃 欲解決之技術問題點者。 解決問題之技術特點： 一種粑轂棘齒結構，其包含有：一棘齒盤、一阻尼件、一心軸及 一花轂所組合而成，一花轂係以軸承使心軸固定其中央，該心軸係由 I轂之容置空插人，且該心轴之止擒環—侧係緊貼於花較内部之 © 軸承，棘齒之數量係配合棘齒盤之棘齒座上所設有的棘齒開口之數 量，並由棘齒座之外側端置入於棘賴口中，且棘齒之棘齒支點係位 於棘齒轴孔中，該棘齒之凸柱係朝向外側，又該一限位件係套掣於棘 齒座之限位槽内，使棘齒定位於棘齒開口中，一阻尼件係套掣於心轴 之止擋環上，且壓迫於止檔件之上方，一棘齒盤係由花轂之容置空間 套掣於心轴上，且阻尼件係以抵掣孔端貼於棘齒盤之棘齒座之側面 上，其棘齒上之凸柱係設置於抵掣孔中，該棘齒係位於花轂之斜齒環 ® 之内侧’又該軸承及定位件係由齒盤座側交叉置入棘齒盤内，車輪係 固定於花轂上’而踏板係固定於棘齒盤上，又該心軸與車架係呈固定， 其中’心轴係為一固定端，且阻尼件係受心轴上之止擋件所推擠，產 生一定程度之阻力使阻尼件不容易轉動，阻尼件之抵掣孔係與棘齒之 凸柱互相配合，當棘齒盤向後轉動時，由棘齒座帶動棘齒轉動，且棘 齒之凸柱係轉向抵掣孔之内側端，該抵掣孔之内側端係為靠近其轴心 處，其凸柱係使棘齒呈閉合狀，又該棘齒盤之力道大於止擋件之阻力 200938405 時，阻尼件係於棘齒幽步轉動，即可將_與_之斜齒面分 開，使棘賴自行轉動，又肺贼限鱗之定位，棘料保持常閉 狀態。 對照先前技術之功效： ㈠、其_腳踏板向前時，贴柱係沿著抵掣槽之斜度向圓週外側 滑移，又該阻尼件之阻力係使棘齒向外開啟，當棘齒抵觸於斜 齒環之斜齒©時’該棘雜係可帶動花轂同步向前轉動，即可 Ο 使自行車能·騎乘，又_踏板反轉時，骑產生棘齒與斜 齒面之嗓音。 (二）、棘齒之凸㈣轉向卿孔之_端，其凸柱係使棘齒呈閉合狀， 即可將棘餘斜齒環之斜齒面分開，使棘齒盤自行轉動，又棘 #係受限位件之位，棘齒即保持常閉狀態，是故花穀之前、 後轉皆不會帶動該棘齒盤，俾以獲得當牵動自行車時，其腳踏 板皆不會轉動之效果者。 〇 【實施方式】 為使貴審查委㈣本侧之目的、舰及功效麟有更進一步之瞭 解與認識，以下茲請配合【圖式簡單說明】詳述如后： 先請由第1圖與第2圖所示觀之，一種花倾齒结構，其包含有： -棘齒盤⑽、-阻尼件(20)、-心轴⑽及—脑⑽)所組合而成， 一棘齒盤（10)其本體係為一齒盤座（11)及一棘齒座（12)，並可設置有 棘齒（13)及限位件（14)，棘齒盤（1〇)之轴心係呈一中空之圓孔，其齒 200938405 盤座（11)係可裝設有齒盤，該棘齒座（12)係為一空心環體，且於棘齒 座（12)之圓週上係形成一圈之限位槽（121)，該棘齒座（〖2)之圓週上係 開設有複數個棘齒開口（122)，又該棘齒開口（122)係呈一偏斜向下之 凹槽，且於凹槽之底端設有一棘齒軸孔（123)，複數個棘齒（13)皆為配 合棘齒開口（122)之形狀而呈微斜彎狀，該棘齒（13)其上表面係開設與 棘齒座（12)相同之限位槽（131)，又該棘齒（13)係配合棘齒軸孔(123) 於其下端設有棘齒支點（132)，於棘齒（13)外側之侧邊係設有凸柱 (133) ’限位件(14)係為一圓形彈性體，一阻尼件(2〇)係為一同等於棘 齒座（12)直徑之圓環，且於阻尼件(2〇)上開設有複數個抵掣孔(21), 該抵掣孔(21)係呈一外擺之斜槽，一心軸(3〇)係為一圓柱體，且前後 端係設有外螺紋’其中段之適當處係凸設一止擋環(31)，該止擋環(31) 之圓表面上係開設有複數個止播孔(311)，又該止撞件（32)與彈性件 (33) 係裝設於止擋孔(311)中，且該止檔孔(3Π)係可改設於阻尼件(2〇) 之内緣，並提供該止擋件(32)與彈性件(33)之裝設，其止擋件(32)係 可為一鋼珠或一滾柱，又其彈性件(33)係可為一圈狀彈簧或一片狀彈 簧’此心轴(30)上係可套掣複數個軸承(34)及定位件(35)，一花轂(4〇) 係為一中空之圓柱，其一側係設有一容置空間（41)，該容置空間（41) 之内部係設有一斜齒環(42)，該斜齒環(42)係固定於花轂(4〇)之内 部’且斜齒面（421)係朝向内侧。 其結構之組合，再請由第2、3圖所示觀之，一花轂(4〇)係以轴承 (34) 使心轴(30)固定其中央，該心軸(3〇)係由花轂(4〇)之容置空間（41) 200938405 側插入，且該心軸(30)之止擋環(31)—側係緊貼於花轂(40)内部之軸 承(34) ’棘齒（13)之數量係配合棘齒盤（1〇)之棘齒座（12)上所設有的 棘齒開口（122)之數量，並由棘齒座（12)之外側端置入於棘齒開口（122) 中’且棘齒（13)之棘齒支點（132)係位於棘齒轴孔（123)中，該棘齒（13) 之凸柱(133)係朝向外侧，又該一限位件（14)係套掣於棘齒座（12)之限 位槽（121)内，使棘齒（13)定位於棘齒開口（122)中，一阻尼件（20)係 套掣於心轴(30)之止擋環(31)上，且壓迫於止檔件(32)之上方，一棘 ® 齒盤(10)係由花轂(40)之容置空間（41)套掣於心轴(30)上，且阻尼件 (20)係以抵掣孔(21)端貼於棘齒盤（1〇)之棘齒座（12)之侧面上，其棘 齒（13)上之凸柱（133)係設置於抵掣孔(21)中，該棘齒（13)係位於花轂 (40)之斜齒環(42)之内侧，又該轴承(34)及定位件(35)係由齒盤座（11) 側交又置入棘齒盤（10)内。 其實際之作動情況，續請由第3、4、5圖所示觀之，該車輪係固 定於花轂(40)上’而踏板係固定於棘齒盤（10)上，又該心軸(3〇)與車 架係呈固定，其中，心軸(30)係為一固定端，且阻尼件(2〇)係受心軸 (30)上之止擋件(32)所推擠，產生一定程度之阻力使阻尼件（2〇)不容 易轉動，阻尼件（20)之抵掣孔(21)係與棘齒（13)之凸柱（133)互相配 合，當棘齒盤(10)向後轉動時，由棘齒座（12)帶動棘齒（13)轉動，且 棘齒（13)之凸柱（133)係轉向抵掣孔(21)之内側端，該抵掣孔(21)之内 侧端係為靠近其軸心處’其凸柱(133)係使棘齒（13)呈閉合狀，又該棘 齒盤（10)之力道大於止擋件(32)之阻力時，阻尼件(2〇)係於棘齒盤（1〇) 200938405 呈同步轉動，即可將棘齒（13)與斜齒環(42)之斜齒面(421)分開，使棘 齒盤（ίο)自行轉動，又棘齒（13)係受限位件（14)之定位，棘齒（13)即 保持常閉狀態，是故花轂(4〇)之前、後轉皆不會帶動該棘齒盤(1〇)， 俾以獲得當牵動自行車時，其腳踏板皆不會轉動之效果者。 復請由第3、6、7圖所示觀之，其踏動腳踏板向前時，棘齒盤(1〇) 係向進轉動並帶動棘齒（13)沿著心軸(30)轉動，該棘齒（13)係受阻尼 件(20)之限制，又該凸柱（133)係沿著抵掣槽(21)之斜度向圓週外側滑 ® 移，該阻尼件(2〇)之阻力係使棘齒（13)向外開啟，當棘齒（13)抵觸於 斜齒環(42)之斜齒面(421)時’該棘齒盤(1〇)係可帶動花轂(4〇)同步向 前轉動，又該棘齒盤（10)之力道大於止擋件(32)之阻力時，阻尼件(2〇) 係於棘齒盤（10)呈同步轉動，即可使自行車能順利騎乘，又於腳踏板 反轉時，不會產生棘齒（13)與斜齒面（421)之噪音。 綜上所述，本發明榷實已達突破性之結構設計，而具有改良之發 明内容，同時又能夠達到產業上之利用性與進步性，且本發明未見於 ® 任何刊物，亦具新穎性，當符合專利法相關法條之規定，爰依法提出 發明專利申請，懇請鈞局審查委員授予合法專利權，至為感禱。 唯以上所述者，僅為本發明之一較佳實施例而已，當不能以之限 定本發明實施之範圍；即大凡依本發明申請專利範園所作之均等變化 與修飾，皆應仍屬本發明專利涵蓋之範圍内。 200938405 【圖式簡單說明】 第1圖：係本發明之立體圖。 第2圖：係本發明之立體分解圖。 第3圖：係本發明之局部刮視圖。 第4圖：係本發明之於棘齒部位之棘齒閉合示意圖。 第5圖：係本發明之於阻尼件部位之棘齒閉合示意圖。 第6圖：係本發明之於棘齒部位之棘齒開啟示意圖。 © 帛7 ® :係本發明之祕尼件部位之棘賴啟示意圖。 第8圖：係習知之立體分解圖。 第9圖：係習知之棘齒部位之剖視圖。 【主要元件符號說明】 本發明部份： 齒-盤座----（11) 限位槽----（121X131) 棘齒轴孔---（123) 棘齒支點---（132) 限位件----（14) 抵掣孔----（21) 止擒環----（31) 止擋件----（32) 棘齒盤 （10) 棘齒座----（12) 棘齒開口---Q22) 棘齒-----（13) 凸柱-----（133) 阻尼件----（20) 心軸-----(3〇) 止擔孔 （311) 12 -(34) 200938405 生 --— -(33) 軸承 - 定位件--- -(35) 化較 -(40) 容置空間一- 斜齒環--- -(42) 斜齒面--- 習知部份： 棘齒盤--- -(50) 齒盤一—— 棘齒座--- 一（52) 棘齒孔--- 棘齒 — (53) _彈性件--- 花轂---- -(60) 棘齒盤室-- 斜齒面--- — (611) 心轴 -(70) 止擋環--- 軸承 -(72) 定位件--- -(41) -(421) -(51) -(521) -(54) -(61) -(71) -(73) ❹ 13200938405 IX. Description of the Invention: [Technical Field] The present invention relates to a flower hub ratchet structure, and more particularly to a transmission mechanism between a pedal and a wheel of a bicycle, which utilizes a limiting member to make a ratchet Maintaining the normally closed state, the ratcheting studs and the damper members are in a displacement relationship, so that the pedals are reversed without driving the pedals, and no noise is generated. [Prior Art] The flower of the conventional bicycle is more like a ratchet structure. As shown in Figs. 8 and 9, it comprises: a ratchet disk (50), a flower hub (60) and a mandrel (70). A ratchet disk (50) is a tubular body, and a toothed disc (51) and a ratchet seat (52) are arranged on the circumferential surface, and a plurality of circumferential surfaces of the ratchet seat (52) are provided The ratchet hole (521) is provided with a plurality of ratchet teeth (53), and an elastic member (54) is disposed between the ratchet tooth (53) and the ratchet hole (52), and a flower hub (60) is provided a tubular body having a ratchet disk chamber (61) on one side, and a helical tooth surface (611) in the ratchet disk chamber (61), a mandrel (70) being a cylinder and front and rear The end is provided with an external thread, and a suitable stop is provided with a stop ring (71), and the ratchet disk (5〇), the flower hub (6〇) and the mandrel (70) can be arranged in plural The bearing (72) and the positioning member (73) have a mandrel (7〇) fixed to the hub (60) by a bearing (72), and the ratchet seat (52) is placed into the flower hub (6〇) In the ratchet disk chamber (61). In the actual operation, the ratchet (51) is pushed outward by the elastic member (54), and the normal state remains open and interferes with the helical tooth surface (611) of the flower hub (6〇) when rotating When the ratchet disk (50) is rotated forward, the ratchet (51) is against the oblique tooth surface (611), and the ratchet disk (5〇) is transmitted through the 200938405 through the ratchet (51) to drive the flower hub ( 6〇), when the ratchet (51) is reversed, the ratchet (51) is actuated by the helical tooth surface (611) and the elastic member (54), and the effect of the pendulum motion is generated, and the flower hub (60) That is, when the ratchet (51) is interlocked, and the flower hub (60) is rotated forward, the ratchet (51) is not driven by the flower hub (60), and the flower hub is reversed (6) 〇), the ratchet (51) is reversely urged by the helical tooth surface (611) to cause the ratchet disk (50) to rotate. Looking at the above-mentioned conventional structure, it is not difficult to find that there are still some shortcomings. The main reasons are as follows: 〇 (1) When the ratchet (51) is reversed, the ratchet (51) is subjected to a helical tooth surface. (611) acts with the elastic member (54) to produce the effect of the oscillating motion, and the flower (6 〇) is not interlocked by the ratchet (η), and the oscillating process generates friction and noise. (-), when the rotation of the flower is longer than (10)), the ratchet (5)) is not affected by the flower (10)). When the flower is reversed (60), the ratchet (5) is reversed. Pushing to the inclined tooth surface (10)) causes the shaft (5〇) to reverse, and the slit (9) to carry the foot pedal, so that the pedal (4) rotates when the vehicle is retracted, and the unnecessary rotation is easy. Error © Injury to the user. In view of this, the present inventors have been engaged in the manufacturing development and design experience of related products for many years. In view of the above-mentioned objectives, after detailed design and careful evaluation, the present invention is finally obtained. SUMMARY OF THE INVENTION The technical problem to be solved is: the conventional flower hub structure, when the bicycle is receded, the pedals of the bicycle will rotate synchronously, so that 200938405 has to affect the bicycle before the marriage, and the Pei and the oblique The tooth surface is kept in abutting shape, so that when the flower is not driven by the ratchet disk, friction and noise are generated, which is a technical problem to be solved. Technical features for solving the problem: A hub ratchet structure comprising: a ratchet disk, a damping member, a mandrel and a flower hub, and a flower hub is fixed by a bearing to fix the center of the mandrel, The mandrel is inserted into the space of the I hub, and the mandrel ring of the mandrel is affixed to the inner bearing of the flower. The number of ratchets is matched with the ratchet seat of the ratchet disk. The number of ratchet openings is set, and is inserted into the spine port by the outer side end of the ratchet seat, and the ratchet fulcrum of the ratchet is located in the ratchet shaft hole, and the stud column is oriented toward the outer side, The limiting member is sleeved in the limiting groove of the ratchet seat, so that the ratchet is positioned in the ratchet opening, and a damping member is sleeved on the stop ring of the mandrel and pressed against the stop member. Above, a ratchet disk is sleeved on the mandrel by the accommodation space of the flower hub, and the damping member is attached to the side of the ratchet seat of the ratchet disk with the abutting end, and the protrusion on the ratchet It is disposed in the escutcheon, which is located inside the slanting ring of the flower hub, and the bearing and the locating member are inserted into the ratchet disk by the side of the sprocket seat. The wheel system is fixed on the flower hub' and the pedal system is fixed on the ratchet disk. The mandrel is fixed to the frame, wherein the 'mandrel is a fixed end, and the damping member is terminated by the mandrel. When the stopper is pushed, a certain degree of resistance is generated to make the damper member not easily rotate, and the damper member of the damper member cooperates with the stud of the ratchet tooth. When the ratchet disk rotates backward, the ratchet tooth rotates by the ratchet seat. And the convex column of the ratchet gear is turned to the inner end of the abutting hole, and the inner end of the abutting hole is close to the axial center thereof, and the convex column is such that the ratchet teeth are closed, and the force of the ratchet disk is greater than When the resistance of the stopper is 200938405, the damping member is rotated by the ratchet tooth to separate the oblique tooth surface of _ and _, so that the spine rotates by itself, and the lung thief limits the position of the scale, and the ratchet remains normally closed. . According to the effect of the prior art: (1) When the _ foot pedal is forward, the sticking column slides along the slope of the abutting groove to the outer side of the circumference, and the resistance of the damper member causes the ratchet to open outward, when the ratchet When the tooth is in contact with the helical tooth of the helical ring ©, the ratchet can drive the flower hub to rotate forward synchronously, so that the bicycle can ride and the pedal is reversed, and the ratchet and the helical tooth surface are generated. The voice. (2) The convexity of the ratchet (4) turns to the _ end of the clear hole, and the convex column is such that the ratchet teeth are closed, and the oblique tooth surface of the oblique helical ring can be separated, so that the ratchet disk rotates by itself, and the ratchet #系限制位位位, ratchet is kept in a normally closed state, so the front and back of the flower valley will not drive the ratchet disk, so that when the bicycle is touched, the pedals will not The effect of turning. 〇[Embodiment] In order to make the purpose, ship and efficacy of this side of the review committee (4) have a better understanding and understanding, please refer to the following [simplified description of the drawings] as follows: First, please refer to Figure 1 As shown in Fig. 2, a flower tilting structure comprising: - a ratchet disc (10), a damping member (20), a mandrel (10) and a brain (10), a ratchet disc ( 10) The system is a toothed disc holder (11) and a ratchet seat (12), and can be provided with a ratchet (13) and a limiting member (14), and a shaft of the ratchet disc (1〇) A hollow circular hole, the tooth 200938405 disk holder (11) can be equipped with a toothed disc, the ratchet seat (12) is a hollow ring body, and is formed on the circumference of the ratchet seat (12) a limit slot (121) of the ring, the ratchet seat (2) is provided with a plurality of ratchet openings (122) on the circumference thereof, and the ratchet opening (122) is a downwardly concave groove a slot, and a ratchet shaft hole (123) is disposed at a bottom end of the groove, and the plurality of ratchet teeth (13) are slightly obliquely shaped to fit the shape of the ratchet opening (122), the ratchet (13) The upper surface is opened to the ratchet seat (12) The limiting slot (131), the ratchet (13) is coupled with the ratchet shaft hole (123), and has a ratchet fulcrum (132) at a lower end thereof, and a convex portion on a side of the outer side of the ratchet (13) Column (133) 'The limiting member (14) is a circular elastic body, and a damping member (2〇) is a ring equal to the diameter of the ratchet seat (12) and is on the damping member (2〇) A plurality of escutcheons (21) are formed, the slanting holes (21) are inclined grooves of a pendulum, a mandrel (3 〇) is a cylinder, and the front and rear ends are provided with external threads. Appropriately, a stop ring (31) is protruded, and a plurality of stop holes (311) are fastened on the circular surface of the stop ring (31), and the stopper (32) and the elastic member (33) are further disposed. ) is installed in the stop hole (311), and the stop hole (3Π) can be modified on the inner edge of the damping member (2〇), and the stopper (32) and the elastic member are provided (33) The mounting member (32) may be a steel ball or a roller, and the elastic member (33) may be a coil spring or a piece of spring 'this mandrel (30) is attached A plurality of bearings (34) and a positioning member (35) can be arranged, and a flower hub (4〇) is a hollow cylinder, and one side is provided with a capacity The space (41), the inside of the accommodating space (41) is provided with a helical ring (42) fixed to the inside of the hub (4 〇) and the helical tooth surface (421) The system is facing inward. The combination of the structures, as shown in Figures 2 and 3, is a hub (4〇) with a bearing (34) to fix the mandrel (30) to the center. The mandrel (3〇) is composed of The hub (4〇) of the flower hub (41) 200938405 is inserted into the side, and the retaining ring (31) of the mandrel (30) is a bearing (34) that is attached to the inside of the hub (40). The number of teeth (13) is matched to the number of ratchet openings (122) provided on the ratchet seat (12) of the ratchet disc (1) and is placed by the outer end of the ratchet seat (12). The ratchet fulcrum (132) of the ratchet opening (122) and the ratchet (13) is located in the ratchet shaft hole (123), and the stud (133) of the ratchet (13) is oriented outward, and A limiting member (14) is sleeved in the limiting groove (121) of the ratchet seat (12) to position the ratchet (13) in the ratchet opening (122), and a damping member (20) sleeve Hanging on the stop ring (31) of the mandrel (30) and pressing above the stopper (32), a ratchet® (10) is accommodated by the hub (40) (41) The damper member (30) is attached to the mandrel (30), and the damper member (20) is attached to the side of the ratchet seat (12) of the ratchet disk (1 〇) with the yoke hole (21) end, and the ratchet teeth (13) ) The protruding post (133) is disposed in the abutting hole (21), and the ratchet (13) is located inside the helical ring (42) of the hub (40), and the bearing (34) and the positioning member ( 35) is placed laterally by the spur base (11) and placed in the ratchet disk (10). The actual action is continued, as shown in Figures 3, 4, and 5, the wheel is fixed to the hub (40) and the pedal is fixed to the ratchet disc (10), and the mandrel (3〇) is fixed to the frame, wherein the mandrel (30) is a fixed end, and the damping member (2〇) is pushed by the stopper (32) on the mandrel (30). A certain degree of resistance is generated so that the damper member (2〇) does not easily rotate, and the damper member (21) of the damper member (20) cooperates with the boss (133) of the ratchet (13), and the ratchet disk (10) When rotating backward, the ratchet (13) is rotated by the ratchet seat (12), and the protruding post (133) of the ratchet (13) is turned toward the inner end of the abutting hole (21), and the abutting hole (21) The inner end of the inner end is close to its axial center. The stud (133) is such that the ratchet (13) is closed, and the force of the ratchet disc (10) is greater than the resistance of the stopper (32). The damping member (2〇) is attached to the ratchet disk (1〇) 200938405. The synchronous rotation of the ratchet (13) and the helical toothed surface (421) of the helical ring (42) allows the ratchet disk (ίο) ) Rotating by itself, and the ratchet (13) is positioned by the restricted position (14), and the ratchet (13) remains normally closed. In the state, the ratchet (1〇) will not be driven before and after the flower hub (4〇), so that the pedals will not rotate when the bicycle is touched. Please see from the 3rd, 6th, and 7th diagrams. When the pedal is stepped forward, the ratchet disc (1〇) rotates forward and drives the ratchet (13) along the mandrel (30). Rotating, the ratchet (13) is limited by the damper member (20), and the stud (133) is slidably moved outwardly along the slope of the abutment groove (21), the damper member (2〇) The resistance is such that the ratchet (13) opens outwardly. When the ratchet (13) abuts against the oblique tooth surface (421) of the helical ring (42), the ratchet disk (1〇) can drive the flower hub (4〇) synchronously rotating forward, and when the force of the ratchet disk (10) is greater than the resistance of the stopper (32), the damping member (2〇) is rotated synchronously with the ratchet disk (10). The bicycle can be smoothly rided, and when the pedal is reversed, the noise of the ratchet (13) and the oblique tooth surface (421) is not generated. In summary, the present invention has achieved a breakthrough structural design, and has improved invention content, while at the same time achieving industrial applicability and progress, and the present invention is not found in any publication, but also novel. When complying with the provisions of the relevant laws and regulations of the Patent Law, the application for invention patents shall be filed according to law, and the examination authority of the bureau shall be granted a legal patent right. The above is only a preferred embodiment of the present invention, and the scope of the present invention cannot be limited thereto; that is, the equal changes and modifications made by the patent application garden of the present invention should still belong to the present invention. Within the scope of the invention patent. 200938405 [Simplified description of the drawings] Fig. 1 is a perspective view of the present invention. Fig. 2 is a perspective exploded view of the present invention. Fig. 3 is a partial plan view of the present invention. Fig. 4 is a schematic view showing the ratchet closure of the ratchet portion of the present invention. Fig. 5 is a schematic view showing the ratcheting of the damper portion of the present invention. Fig. 6 is a schematic view showing the ratchet opening of the ratchet portion of the present invention. © 帛7 ® : A schematic diagram of the secret parts of the present invention. Figure 8: A stereoscopic exploded view of the prior art. Figure 9 is a cross-sectional view of a conventional ratchet portion. [Main component symbol description] Part of the invention: Tooth-disk holder----(11) Limit slot----(121X131) Ratchet shaft hole---(123) Ratchet pivot point---(132 Limiting parts----(14) 掣孔----(21) 擒-ring----(31) Stopper----(32) Ratchet disc (10) Ratchet seat ----(12) Ratchet opening---Q22) Ratchet-----(13) Stud-----(133) Damping member----(20) Mandrel---- -(3〇) Stop hole (311) 12 -(34) 200938405 Raw----(33) Bearing - Positioning piece--- -(35) Comparison-(40) Housing space one - Helical ring --- -(42) Helical surface--- conventional part: ratchet disk----(50) spur disk one - ratchet seat--- one (52) ratchet hole--- spine Tooth—(53) _elastic member--- flower hub-----(60) ratchet disc chamber-- helical tooth surface---- (611) mandrel-(70) stop ring--- bearing -(72) Positioning member----(41) -(421) -(51) -(521) -(54) -(61) -(71) -(73) ❹ 13