M332035 % 、八、新型說明： 【新型所屬之技術領域】 本創作是關於一種棘輪與輪轂，且特別是關於一種能用於進行倒 裝設置的輪轂及其棘輪。 【先前技術】 在腳年代時，美國興起了一種自行車越野(bicyde m〇to_s) -運動，用於此種運動的自行車被稱為BMX自行車。ΒΜχ自行車的車 •型比較小、輪胎比較粗，且比赛的場地也和越野摩托車所用的場地十 分相似。這項運動很快在青年人中流行起來，然而到了 198()年代中 期，大多數年輕人深受滑板文化的影響，覺得只在場地裏時太過單 -，因此當時-個叫B0BHAR0的年輕人在前後車輪安裝了踏板，玩 家們就可以借助這幾個踏板做出許多新的花式。於是，人們開始把 BMX自行車棚平地，滑板㈣地裏玩，而且玩的花式輯板更多， 跳得更高，更做了，域種自行車的名字也從ΒΜχ自行車變成了 BMX freestyle 自行車。 _ =參照圖1，圖1所繪示為一種市面上之BMXfreestyle自行車。 車ίο,包括車架u、後車輪14、前車輪14，與傳動系統，其 •=輪Μ與後車輪W是分別組裝於車架^之前懸吊架U與後懸 木13士上。傳動系統15包括一踏板、一第一鍵輪η、一鍵條β 二j季又1〇\’使用者藉由踩動踏板16而帶動第一鏈輪17旋轉，第 請=1^疋轉會帶動鍵條18轉動’而鍵條18的轉動則讓輪轂本體 把ij4旋轉，使自行車10向前推進。此外，踏板19與踏 —、刀別"又於後車輪14與前車輪14,上，供使用者進行花式表 凉用。 圖2所!合示兔—^ 、曰’、…、一種用於BMX freestyle自行車的輪轂，此輪轂1〇〇 5 M332035 ί要由t?/10、輪轂本體120、棘輪130、内齒環140與多個軸承 nr所構成。輪穀本體120與棘輪⑽是套設在心軸⑽上， ΐ』毅接二12二雜輪130皆是利用轴承150而與心軸110進行滾動 =闰II時參顯2與圖3，圖3崎示為棘輪與内齒環的 =^34二,包括—第二鏈輪132、多個棘爪134與一彈簧136， ^卜，繞的方式且等間隔地裝設在在棘輪130的棘爪溝 跡太㈣1彈餐136進行固定。此外，請參照圖4，圖4所綠示為 環社體圖。喃環14G上設有第—右觀紋心 “r翁= 内表面則設有第二右旋螺紋122,第一右旋螺紋142 相契合，以順時針的方向將内齒環140旋入， 可使内齒裱140固定在輪轂本體12〇中。 圖2) I値Β士、^可知’當鍵條18 (如圖1：>拉動第二鏈輪132 (如 以會與内ΐ環時’也會帶動棘輪130旋轉，此時棘爪 告 ^ 之内回144相咬合，而使内齒環140進行轉動， Ϊ 2時，也會連帶使輪數本體120進行旋轉，而使自行 拉動第二鏈輪_逆時針方向進行旋轉時， =0不會順滑過内齒環140之内齒144，此時輪轂本 骽20不會被帶動，此狀況即所謂的「空轉」。 不 t )，如此設計的原因在於防止當使用者進行 自行車到鏈條18或棘輪13G。然而，有些使用者卻習慣於 之糊進桃絲演，如此—來細 自行車10之左侧。但是，如此一來，自行車ω之制ίΐ :、用另外一種不同形式的輪較 上 =必 的倒裝，理由將於下敘述。 輪車又咖進行⑽ 當輪穀100進行勘。的倒裝後，自行車10在前進時，由於棘輪 M332035 130的旋轉方向與原本相反，故棘輪13〇的棘爪溝138輿内齒環14〇 之内齒144的設置方向皆需進行18〇。的逆轉，且第一右旋螺紋142 與第-右旋驗122皆需改為左旋驗。要將右旋驗改為左旋螺紋 的原因在於··當棘輪13〇裝在自行車1〇之左側後，由於旋轉方向相反 (變為逆時針），若仍沿用右旋螺紋，則會造成内齒環⑽的鬆脫。 因此’ §自订車10之製造者欲將鏈條18與棘輪13〇 I設在自行 車10之左側日守’並無法沿用原本所使用的輪轂励，而必須生產出另 外-組不同的輪轂。這樣—來，會增加製造成本。M332035 % , VIII, new description: [New technical field] This creation is about a ratchet and a hub, and in particular, a hub and a ratchet that can be used for flip mounting. [Prior Art] In the foot age, a bicycle biking (bicyde m〇to_s)-sports was launched in the United States, and bicycles used for such sports were called BMX bicycles. ΒΜχBicycles • The type is smaller, the tires are thicker, and the venue of the competition is similar to that used for off-road motorcycles. The sport quickly became popular among young people. However, in the mid-198s, most young people were deeply influenced by the skateboarding culture and felt that they were too single in the venue--so at that time, a young man named B0BHAR0 People install pedals on the front and rear wheels, and players can use these pedals to make many new fancy styles. As a result, people began to play BMX bicycle sheds on the ground, skateboarding (four), and play more fancy boards, jump higher, and do more, the name of the domain bike has also changed from a bicycle to a BMX freestyle bicycle. _ = Referring to Figure 1, Figure 1 depicts a BMXfreestyle bicycle on the market. The vehicle ίο includes a frame u, a rear wheel 14, a front wheel 14, and a transmission system, and the rim and the rear wheel W are respectively assembled on the frame U and the rear suspension frame. The transmission system 15 includes a pedal, a first key wheel η, a key bar β two j seasons and 1 〇 \ 'the user drives the first sprocket 17 to rotate by stepping on the pedal 16 , the first please = 1 ^ turn The key strip 18 will be rotated 'and the rotation of the key strip 18 causes the hub body to rotate the ij4 to advance the bicycle 10. In addition, the pedal 19 and the pedal, the knife and the front wheel 14 and the front wheel 14, are provided for the user to perform the fancy table cooling. Figure 2 shows a rabbit-^, 曰', ..., a hub for a BMX freestyle bicycle, the hub 1〇〇5 M332035 ί is to be used by t?/10, the hub body 120, the ratchet 130, the internal gear ring 140 It is composed of a plurality of bearings nr. The volute body 120 and the ratchet wheel (10) are sleeved on the mandrel (10), and the ΐ 毅 接 二 12 12 12 12 12 12 12 12 12 130 130 130 130 130 130 130 130 130 130 130 闰 闰 闰 闰 闰 闰 闰 闰 闰 闰 闰 闰 闰 闰 闰 闰 闰 闰 闰It is shown as a ratchet and an inner ring of the ring φ 34, including a second sprocket 132, a plurality of pawls 134 and a spring 136, which are wound around and arranged at equal intervals on the spines of the ratchet 130. The claw groove is too (four) 1 ammunition 136 to be fixed. In addition, please refer to FIG. 4, and the green color of FIG. 4 is shown as a ring body map. The ring 14G is provided with a first right-handed heart. The inner surface is provided with a second right-handed thread 122. The first right-handed thread 142 is engaged, and the inner ring gear 140 is screwed in a clockwise direction. The inner gum 140 can be fixed in the hub body 12〇. Fig. 2) I gentleman, ^ knows 'when the key bar 18 (as shown in Figure 1: > pull the second sprocket 132 (such as with the inner ring At the same time, the ratchet wheel 130 is also rotated. At this time, the internal claw ring 140 is rotated by the pawl, and the inner ring gear 140 is rotated. When the Ϊ 2 is used, the wheel number body 120 is also rotated to be pulled by itself. When the second sprocket _ rotates counterclockwise, =0 will not pass through the inner teeth 144 of the inner ring gear 140, and the hub 骽 20 will not be driven. This condition is called “idling”. The reason for this design is to prevent the user from carrying the bicycle to the chain 18 or the ratchet 13G. However, some users are accustomed to the paste into the peach screen, so that the bicycle 10 is on the left side. However, this is the case. , bicycle ω system ίΐ :, with another different form of the wheel = the necessary flip, the reasons will be described below. When the bicycle 10 is moving forward, since the rotation direction of the ratchet wheel M332035 130 is opposite to the original, the ratchet wheel 138 of the ratchet wheel 13 舆 舆 the inner ring gear 14 The setting direction of the internal teeth 144 needs to be reversed by 18 〇, and the first right-handed thread 142 and the first-right-handed test 122 need to be changed to the left-handed test. The reason for changing the right-handed test to the left-handed thread is... When the ratchet 13 is mounted on the left side of the bicycle, since the direction of rotation is reversed (becomes counterclockwise), if the right-hand thread is still used, the inner ring (10) will be loosened. Therefore, § custom car 10 The manufacturer wants to set the chain 18 and the ratchet 13〇I on the left side of the bicycle 10 and cannot use the wheel hub that was originally used, but must produce another set of different hubs. This will increase the manufacturing cost.
自彳了車的棘輪與輪轂本體之裝設方_轉時，不需 、/、订’叹计與製造，是值得本領域具有通常知識者去思量地。 【新型内容】 一心it本創作提供—種輪轂，其包括： 棘輪包括. w广'—輪毅本體。棘輪是套設於心軸上， ’溝槽則設於棘輪的另外一 該棘輪的其中個溝槽、多個棘爪與多轉片。鏈輪設於 相對稱的第—次溝槽與第二次溝槽二二=。這些溝槽具有兩兩 狀為圓弧型。棘爪的第—端裝設於第=槽與第二次溝槽的形 外露在溝槽外，的帛 嘛的第二端則 則抵接著棘爪。内齒環圍结nj—人溝槽内，且彈片的第二端 別凸設有多個第一凸塊與;個凸塊、’ 2，環的内表面與外表面分 塊’這些第二凸塊的延伸 4棘爪的第二端抵接著第-凸 左右兩側皆適於讓棘爪的第行=伸二向相同，且第一凸塊的 為進仃抵接。輪穀本體套設於心轴上， 7 M332035 齒環的—侧之内表面設有多個凹槽，這些凹槽與 而 且 ，=輪第一？是呈左右對稱，且呈梯形狀。 —凸塊相緊配。此外，第二凸塊則是呈長方體狀。 為了達成上述目的與其他目的，本創作另提供—種棘輪， 至少-鏈輪、多個溝槽與多個棘爪。鏈輪是設於該棘 二‘ 而溝槽則設於棘輪的料—侧，這些職具有兩兩姆_^一=溝 域槽’且第—次溝槽與第二次溝槽的形狀為·型。此外， 棘爪的弟-端裝設於第—次溝槽内，而棘爪 外。另外’彈片的第-端裝設於第二次溝槽内，且這“卜 則抵接著棘爪。 - 由於在補作之巾’棘輪麟槽料柏姆稱料—次溝槽與 第二次溝槽’所財製造者鎌練歸纖後，顧將棘爪的第二 端裝設於第二次溝槽内，並將彈片的第一端裝設於第一次溝槽内，便 可將棘輪裝設於自行車之左侧^由於不需生產出另外—組不同設計的 棘輪與輪轂本體，故可將製造成本壓低。 為使熟悉該項技藝人士瞭解本創作之目的、特徵及功效，兹藉由 下述具體實細，並配合所附之賦，對本創作詳加說明如后。 【實施方式】 請參照圖5 ’圖5所緣示為本實施例之一輪轂之爆炸圖。輪數2〇〇 包括··-心軸210、-輪轂本體no、一棘輪23〇與一内齒環24〇。棘 輪230套設於心軸210上，此棘輪230包括一鏈輪232、多個溝槽234、 多個棘爪236與多個彈片238，鏈輪232與溝槽234是分別設置在棘 輪230的兩側。此外，内齒環240套設於心軸21〇上且圍繞著上述之 棘爪236，内齒環240的内表面凸設有多個第一凸塊242，而内齒環 M332035 τ ‘ 240的外表_凸_多個第二凸塊244，其中第二凸塊244的延伸方 向與心軸210的延伸方向相同，在本實施例中，第二凸塊—為一長 方體。另外’輪殺本體22G套設於心軸上，且輪轂本體22〇於靠 近内齒環細的-側之内表面設有多個第三凸塊222，第三凸塊^ 彼此之間形成有-凹槽224 ’這些凹槽224與第二凸塊244彼此相契 合:此外’輪穀200還包括四個軸承2s〇，輪轂本體22〇與棘輪23〇 •皆是利用軸承250而與心軸21〇進行滾動連接，而每一軸承25〇皆油 •封有多健珠（未緣示）。另外，在圖5中繪示但未標以標號的零件由 於並非本創作的重點，故在此便不加以介紹。 。月參妝圖ό，圖ό所緣示為棘輪與内齒環的右侧視圖。溝槽234 具有兩兩相對稱的第-次溝槽234a與第二次溝槽234b，且第一次溝 槽234a與第二次溝槽234b的形狀為圓弧型。其中，棘爪236的第一 端236a裝設於第一次溝槽234a内，且第一端236a的形狀是與第一次 溝槽234a相契合。彈片238的第一端238a裝設於第二次溝槽234b内， 且彈片238的第二端238b則抵接著棘爪236。此外，由於彈片238的 第二端238b則抵接著棘爪236，而讓棘爪236的第二端236b外露在 溝槽234外，並抵接著内齒環240上的第一凸塊242。 δ自行車10上的鍵條18 (如圖1)拉動第二鍵輪232以順時針方 •向進行旋轉時，棘輪230也跟著轉動，此時由於棘爪236的第二端236b 抵接著第一凸塊242之一侧，故會帶動内齒環240進行旋轉。當内齒 環240轉動時，連帶使輪轂本體22〇進行旋轉，而使自行車1〇向前進。 然而’ ^鏈條18拉動弟二鍵輪232以相反方向進行旋轉時，棘輪230 上的棘爪234會順滑過内齒環240上之第一凸塊242，此時輪較本體 220不會被帶動，而造成棘輪230空轉。 在上述之實施例中，鏈條18與棘輪230是裝設在自行車1〇之右 側。然而，若製造者想將鏈條18與棘輪230裝設在自行車1〇之左侧， 9 M332035 > 則製造者僅需將棘爪236的第一端236a裝設於第二次溝槽234b内， 並將彈片238的第一端238a裝設於第一次溝槽234a内（如圖7所示）， 便可將棘輪230設置於自行車1〇之左側。此時，棘爪236的第二端 236b是抵接於第一凸塊242的另一側。 一 此外，請再參造圖5，輪轂本體220與内齒環240是藉由凹槽224 與第二凸塊244彼此之間相契合，而使内齒環24〇裝設在輪轂本體22〇 上。而且，在本實施例中，第二凸塊244與凹槽224是呈緊配的關係。 •由於輪轂本體220與内齒環240並非以螺紋鎖合的方式進行結合，所 φ 以相較於習知的輪轂本體12〇與内齒環140，本實施例之内齒環24〇 不會於旋轉方向逆轉時產生鬆脫。 义 在本實施例中，第-凸塊242是呈左右對稱的梯形形狀（請參照 ，6) ’然而本領域也可設計成其他的形狀，例如：長方體狀，只要使 ，一凸塊242的左右兩側皆能讓棘爪236的第二端236b進行抵接，而 讓棘輪230能帶動内齒環140進行轉動即可。此外，本領域具有通常 知識者也可在棘輪230上設置多個直徑不等的鏈輪，以提供變速之功 能。 • 綜上所述，由於本實施例之棘輪230的溝槽234具有兩兩相對稱 的第一次溝槽234a與第二次溝槽234b，所以當製造者需將輪轂2〇〇 •進行倒裝後，僅需將棘爪230的第一端236a裝設於第二次溝槽234b 内，並將彈片238的第一端238a裝設於第一次溝槽234a内，便可將 棘輪230設1於自行車1〇之左侧。由於不需生產出另外一組不同設計 的棘輪與輪轂本體，故可將製造成本壓低。 、、雖然本創作已以具體實施例揭露如上，然其所揭露的具體實施例 ，非用以限定本創作，任何熟悉此技藝者，在不脫離本創作之精神和 鈿圍内，當可作各種之更動與潤飾，其所作之更動與潤飾皆屬於本創 M332035 作之辄驚’本創作之保魏圍#視伽之_料_騎界定者為準。 【圖式簡單說明】 圖1所繪示為一種市面上之BMX freestyle自行車。 圖2所繪示為一種用於圖1之BMX freestyle自行車的輪轂。 • 圖3所緣示為圖2之棘輪與内齒環的侧視圖。 圖4所％示為圖2之輪轂本體與内齒環的立體圖。 圖5所繪示為本實施例之一輪轂之爆炸圖。 圖6所繪示為棘輪與内齒環的右侧視圖。 圖7所繪示為棘爪倒裝後，棘輪與内齒環的右側視圖。 【主要元件符號說明】 10 :自行車 11 :車架 14 :後車輪 14’ ：前車輪 15 ·傳動系統 16 :踏板 17 :第一鏈輪 18 :鏈條 11 M332035 、 100 :輪轂 110 ··心轴 120 :輪轂本體 122 :第二右旋螺紋 130 :棘輪 132 :第二鏈輪 134 :棘爪 136 :彈簧 138 :棘爪溝 140 :内齒環 142 :第一右旋螺紋 144 :内齒 150 :轴承 丨 200 :輪轂 210 :心軸 220 :輪轂本體 222 :第三凸塊 224 :凹槽 230 :棘輪 232 :鏈輪 M332035 ’ 234 :溝槽 234a :第一次溝槽 234b :第二次溝槽 236 :棘爪 236a、238a :第一端 236b、238b ··第二端 238 :彈片 240 :内齒環 242 :第一凸塊 244 :第二凸塊 250 :軸承Since the installation of the ratchet and the hub body of the car has been carried out, it is worthwhile to think about it, and it is worthwhile to think about it. [New content] One heart it provides a kind of wheel hub, which includes: The ratchet includes. w Guang' - Wheel Yi body. The ratchet is sleeved on the mandrel, and the groove is provided in one of the other grooves of the ratchet, the plurality of pawls and the multi-rotation. The sprocket is set in the symmetrical first-order groove and the second-order groove two-two. These grooves have a circular shape in two or two shapes. The first end of the pawl is mounted on the second groove and the second groove is exposed outside the groove, and the second end of the pawl abuts the pawl. The inner ring ring surrounds the nj-man groove, and the second end of the elastic piece is convexly provided with a plurality of first protrusions; a bump, '2, the inner surface of the ring and the outer surface are divided into blocks' The second end of the extension 4 of the bump abuts the first and the right sides of the first convex portion to be adapted to make the first row of the pawl = the same direction, and the first projection abuts. The trough body is sleeved on the mandrel, and the inner surface of the side of the 7 M332035 toothed ring is provided with a plurality of grooves, and the grooves are the first one. It is symmetrical and has a trapezoidal shape. - The bumps are closely matched. In addition, the second bump is in the shape of a rectangular parallelepiped. In order to achieve the above and other objects, the present invention further provides a ratchet, at least a sprocket, a plurality of grooves and a plurality of pawls. The sprocket is disposed on the spine 2' and the groove is disposed on the material side of the ratchet. The positions of the sprocket are two-two _^= gully groove and the shape of the first-second groove and the second groove are ·type. In addition, the younger end of the pawl is mounted in the first groove and outside the pawl. In addition, the first end of the shrapnel is installed in the second groove, and this "buts the pawl. - Because in the towel of the patch", the ratchet material is the material of the cymbal - the second groove and the second time After the groove manufacturer's manufacturer has trained the fiber, the second end of the pawl is installed in the second groove, and the first end of the elastic piece is installed in the first groove. The ratchet is installed on the left side of the bicycle. Since it is not necessary to produce another ratchet and hub body with different designs, the manufacturing cost can be lowered. In order to familiarize the person skilled in the art with the purpose, characteristics and effects of the creation, The present invention will be described in detail with reference to the following specific details and the accompanying drawings. [Embodiment] Referring to Figure 5, Figure 5 is an exploded view of a hub of the present embodiment. The number 2 includes a mandrel 210, a hub body no, a ratchet wheel 23〇 and an inner ring gear 24. The ratchet wheel 230 is sleeved on the mandrel 210, and the ratchet wheel 230 includes a sprocket 232 and a plurality of The groove 234, the plurality of pawls 236 and the plurality of elastic pieces 238, the sprocket 232 and the groove 234 are respectively disposed on both sides of the ratchet 230. The inner ring 240 is sleeved on the mandrel 21 and surrounds the pawl 236. The inner surface of the inner ring 240 is convexly provided with a plurality of first protrusions 242, and the inner ring M332035 τ '240 Appearance_convex_a plurality of second bumps 244, wherein the extending direction of the second bumps 244 is the same as the extending direction of the mandrel 210. In this embodiment, the second bumps are a rectangular parallelepiped. 22G is sleeved on the mandrel, and the hub body 22 is provided with a plurality of third protrusions 222 on the inner surface of the thin-side of the inner ring gear. The third protrusions are formed with a groove 224 ′ between each other. The grooves 224 and the second protrusions 244 are in contact with each other: the 'roller 200 further includes four bearings 2s, and the hub body 22 and the ratchet 23 are all rollingly connected to the mandrel 21 by the bearing 250. And each bearing is 25 〇 oil • There are many beads (not shown). In addition, the parts shown in Figure 5 but not marked are not the focus of this creation, so they will not be introduced here. The monthly makeup image is shown in the right side view of the ratchet and the inner ring. The groove 234 has the first and second symmetrical numbers. The groove 234a and the second groove 234b, and the first groove 234a and the second groove 234b have a circular arc shape. The first end 236a of the pawl 236 is disposed on the first groove 234a. The first end 236a is shaped to fit the first groove 234a. The first end 238a of the elastic piece 238 is disposed in the second groove 234b, and the second end 238b of the elastic piece 238 abuts the spine. The claw 236. In addition, since the second end 238b of the elastic piece 238 abuts the pawl 236, the second end 236b of the pawl 236 is exposed outside the groove 234 and abuts the first projection on the inner ring 240 242. When the key bar 18 on the δ bicycle 10 (see FIG. 1) pulls the second key wheel 232 to rotate clockwise, the ratchet wheel 230 also rotates, at which time the second end 236b of the pawl 236 abuts the first One side of the bump 242 drives the inner ring gear 240 to rotate. When the internal ring 240 is rotated, the belt body 22 is rotated to cause the bicycle 1 to move forward. However, when the 'chain 18 pulls the two-key wheel 232 to rotate in the opposite direction, the pawl 234 on the ratchet 230 will smoothly pass over the first protrusion 242 on the inner ring 240, and the wheel will not be compared with the body 220. Driven, causing the ratchet 230 to idle. In the above embodiment, the chain 18 and the ratchet 230 are mounted on the right side of the bicycle. However, if the manufacturer wants to mount the chain 18 and the ratchet 230 to the left side of the bicycle, 9 M332035 > then the manufacturer only needs to install the first end 236a of the pawl 236 in the second groove 234b. The first end 238a of the elastic piece 238 is installed in the first groove 234a (as shown in FIG. 7), and the ratchet 230 can be disposed on the left side of the bicycle. At this time, the second end 236b of the pawl 236 abuts on the other side of the first bump 242. In addition, referring to FIG. 5, the hub body 220 and the inner ring 240 are engaged with each other by the groove 224 and the second protrusion 244, so that the inner ring 24 is mounted on the hub body 22〇. on. Moreover, in the present embodiment, the second bump 244 and the recess 224 are in a tight relationship. • Since the hub body 220 and the inner ring gear 240 are not coupled in a threaded manner, the inner ring gear 24 of the present embodiment does not 相 in comparison with the conventional hub body 12〇 and the inner ring gear 140. Loosening occurs when the direction of rotation is reversed. In the present embodiment, the first bump 242 is a trapezoidal shape that is bilaterally symmetrical (see, 6). However, the art may be designed in other shapes, for example, a rectangular parallelepiped shape, as long as a bump 242 is used. Both the left and right sides can abut the second end 236b of the pawl 236, and the ratchet 230 can drive the inner ring gear 140 to rotate. In addition, a person skilled in the art can also provide a plurality of sprocket wheels of different diameters on the ratchet 230 to provide the function of shifting. In summary, since the groove 234 of the ratchet 230 of the present embodiment has two first and second grooves 234a and 234b, the manufacturer needs to pour the wheel 2 After the mounting, the first end 236a of the pawl 230 is only installed in the second groove 234b, and the first end 238a of the elastic piece 238 is installed in the first groove 234a, and the ratchet 230 can be installed. Set 1 to the left side of the bicycle. Since there is no need to produce another set of ratchet and hub bodies of different designs, the manufacturing cost can be lowered. The present invention has been disclosed in the above embodiments, but the specific embodiments disclosed herein are not intended to limit the present invention, and any person skilled in the art can be made without departing from the spirit and scope of the present invention. All kinds of changes and retouching, the changes and refinements made by them belong to the original M332035. The stunned 'Beiwei' of this creation is based on the gamma _ material _ ride definition. [Simple description of the drawing] Figure 1 shows a BMX freestyle bicycle on the market. 2 is a view of a hub for the BMX freestyle bicycle of FIG. 1. • Figure 3 is a side view of the ratchet and inner ring of Figure 2. Figure 4 is a perspective view of the hub body and the inner ring of Figure 2; FIG. 5 is an exploded view of a hub of the present embodiment. Figure 6 is a right side view of the ratchet and inner ring. Figure 7 is a side elevational view of the ratchet and inner ring gear after the pawl has been flipped. [Main component symbol description] 10: Bicycle 11: Frame 14: Rear wheel 14': Front wheel 15 • Transmission system 16: Pedal 17: First sprocket 18: Chain 11 M332035, 100: Hub 110 · Mandrel 120 : hub body 122 : second right-hand thread 130 : ratchet 132 : second sprocket 134 : pawl 136 : spring 138 : pawl groove 140 : inner ring gear 142 : first right-hand thread 144 : internal tooth 150 : bearing丨200: hub 210: mandrel 220: hub body 222: third bump 224: groove 230: ratchet 232: sprocket M332035 '234: groove 234a: first groove 234b: second groove 236 : pawl 236a, 238a: first end 236b, 238b · second end 238: spring 240: inner ring 242: first bump 244: second bump 250: bearing