M414377 五、新型說明： 【新型所屬之技術領域】 本創作係有關於一種自行車車架結構，特別係指一種包含多 三角形結構之空間桁架系統構件的自行車車架肆構。 【先前技術】 按一般自行車車架之結構設計’主要以金屬管體組製而成，設 前管供前又架及手把軸設組配，使其具備旋轉操控之效能，另設 座管以供座墊下方延設之座桿插組結合，並以螺栓束夾定位該插 組，並於座管下方延設橫向軸管以組設腳踏板之曲柄軸，又在車 架尾端則設後叉以組設後輪軸，藉此組構之自行車車架，因其多 採較重之鐵製金屬管麟結組m故為節省運輸成本並顧及 肖費者騎乘之便利，其車架結構多以輕巧化設計，然卻難以兼顧 騎乘時之穩定性。 【新型内容】 本難以兼顧質輕與穩定性之兩相對優點， 形之空間;^種自订車車架結構’其具有由多三角 性，使以構，能強化車身結構強度與剛 力與穩定性。 =二又呵應力，如此得以提供騎乘時良好彈 上構^ ?自行車車架結構，其所具備之 料得以適度節省耐料、^了丨丨耕排顺成，故其整體材 並增進操控性^料德錢魏，進而得崎低相對成本， 3 M414377 為了達到上述目的，本創作之自行車車架係包括：一前車管， 用㈣設把手桿及前叉管；一座管，㈣上接座桿及座墊；一五 =管’用以設置自行車職橫向綺；_支撐部，肋接固前車 吕、座管及五通管；-連結組’用以連結強化車架結構；一後又 片組’用以軸紐輪軸。上述前車f軸與座管軸形成—鏡射面， 切部係_鏡射面成_鑛，該支#部係包括：—橫向支樓 架組' i向支麟組、及―補強支撐架組，用以相互組接本創 作之自行車車架結構的三角網狀柯架結構。上述橫向支撑架組係 包含六條橫向支撑架；上述縱向切架_包含六條縱向支撐 架丄上述觀域架_包含十侧社縣，且賴強支樓架 之Μι从、向支樓架與縱向支樓架略細。上述連結組包括：一第 樞連s第一樞連官、一第三樞連管、與-強化樞管’用以 樞接各網錢構及鏡射料；i化管，用⑽化多支架及桿件 接』處’補強連桿組，用以連結鏡射部件。上述補強連桿组係 包含五條補強連桿。 根據本創作的一特點，前車管外緣上側接-上前支架，前車管 彖下側接下則支架，邊上刚支架及該下前支架係以鏡射面成 鏡射，且其另端係、結合於—橫向支撐架—端的接點。 根據本創作的另—特點’強化拖管係穿設於—縱向支撑架上。 根據本創作的另一特點，座管外緣上側接一上座支架與一座補 強桿，座管外緣下健-τ座线，該上座該及該下座支架係 以鏡射面成鏡射，該上座支架的另端係結合於—橫向支樓架一端 M414377 的接點，該下財架與該座捍的另端係各自連接於第二輕連 管之外緣。 根據本創侧ϋ點，五辟精_各接—第—底支竿虚 Ζ第二底支L底支_第二底__面成鏡 射^弟-毅架的另端係結合於第—樞連管之外緣該第二底 支罙的另纟而係結合於強化樞管外緣的接點。‘ 根據本創作的另-特點，後叉片組係包括一後上支架與一後下 支架上支賴該後下支架細鏡射面成鏡射，且其尾端各 連結-後叉片’該後上支架另端係結合於第二樞連管之外緣該 後下支架另端係結合於強化樞管外緣的接點。 Τ據本創作的另-特點，自行車車架結構更包括—鎖附桿，其 中段係穿設-螺孔’用以螺接自行車反光片，該鎖畴並以二ν 型管補強其結構。 本ΐ作’上述自行車車架結構可提供良好的強度與剛性， 車能均勻承受高應力，如此私提供騎料良好彈力盘 i'》另外，由於本創狀構件主钱_巧的管狀树連；吉 L、上’故其整體材料得以適度節省*達車架輕量化效能，進心 以降低相對成本，並增進操控性能。 于 【實施方式】 下面參閱第一圖至第三圖說明本創作之實施例。 請同時參閱第一圖及第二圖，根據本創作之一實施例，自行車 車架結構係包括：一前車管(10) ’用以裝設把手桿及前叉管；—座 & (2〇) ’用以上接座桿及座墊；一五通管(30)，用以設置自行車踏 5 M414377 板橫向軸管；一支撐部(40)，用以接固前車管(1〇)、座管(2〇)及五 通管(30); —連結組(50)，用以連結強化車架結構；一後叉片組 (60)，用以軸接後輪軸。上述前車管軸(八)與座管軸形成一鏡射 面’支樓部(40)係以該鏡射面成兩側鏡射，該支樓部(4〇)係包括： 一橫向支撐架組(41)、一縱向支撐架組(42)、及一補強支撐架組 (43)，用以相互組接本創作之自行車車架結構的三角網狀桁架結 構。上述橫向支撐架組(41)係包含六條橫向支撐架(411、412、 413 ' 414、415、416);上述縱向支撐架組(42)係包含六條縱向 支撐架(421 ' 422、423 ' 424、425、426)。上述補強支撐架组 (43)係包含十條補強支樓架(431、432、433、434、435、4·3ό、 437、438、439、440)。上述連結組(5〇)包括：一第一樞連管(51)、 一第二樞連管(52)、一第三樞連管(53)、與一強化枢管(55),用以 樞接各網狀結構及鏡射部件；一補強連桿組(56)，用以連結兩側鏡 射之各部件。上述補強連样組(56)係包含五條補強連桿(561、562、 563、564、兄5、566)。上述前車管(10)外緣上側接一上前支架(11)， 前車管(10)外緣下側接一下前支架(12)，該上前支架(11)及該下前 支架(12)係以鏡射面成鏡射，且其另端係結合於一橫向支撐架(411) 一端的接點(810)。上述座管(2〇)之外緣上側接一上座支架(21)與一 座補強桿(23)，座管(20)外緣下側接一下座支架(22)，該上座支架(21) 及s亥下座支架(22)係以鏡射面成鏡射，該上座支架(21)的另端係結 合於一橫向支撐架一端的接點(810)，該下座支架(22)與該座補強桿 (23)的另端係各自連接於第二樞連管(52)之外緣。上述強化樞管(55) M414377 係穿設於一縱向支#架(425)上。上述五通管(30)外緣兩側各接一第 一底支架(31)與一第二底支架(32)，該第一底支架(31)及該第二底 支架(32)係以鏡射面成鏡射，該第一底支架(31)的另端係結合於第 一樞連管(51)之外緣，該第二底支架(32)的另端係結合於強化樞管 (55)外緣的接點(840)。上述後叉片組(60)係含有一後上支架(61)與 . 一後下支架(62)，該後上支架(61)與該後下支架(62)係以鏡射面成 • 鏡射，且其尾端各連結一後叉片（64)，該後上支架(61)另端係結合 • 於第二樞連管(52)之外緣，該後下支架(62)另端係結合於強化樞管 (55)外緣的接點(840)。 接著，由第二圖可知’上述橫向支撐架组(41)中，橫向支撐架(411) 之另端係結合於接點(810);橫向支撐架(412)之一端係結合於接點 (81〇)，其另端係結合於第二枢連管(52)之外緣；橫向支撐架(413) 之一端係結合於下前支架(12)之外緣，其另端係結合於縱向支撐架 (422)之外緣中段處的接點(82〇);橫向支撐架(414)之一端係結合 奢於縱向支樓架(422)之外緣中段處的接點_)，其另端係結合於縱 -向支撐架(423)之外緣中段處的接點(830);橫向支撐架(415)之一端 係結合於縱向支撐架(423)之外緣中段處的接點(83〇)，其另端係2 合於縱向支雜(424)之外緣；橫向支撐架_)之—端係結合於第 -樞連官⑻之外緣’其另端係結合於強化樞管⑼外緣上之接點 (840)。 ‘·'· 其次，上述縱向支樓架組⑽中，縱向支樓架(421)之_端係結合 於下前支架(12)之外緣，其另端係結合於接點(81〇);縱向支撑: 7 M414377 (422) 之一端係結合於接點(810)，其另端係結合於橫向支撐架(416) 之外緣’縱向支撐架(423)之一端係結合於第二樞連管(52)之外緣， 其另端係結合於第三柩連管⑼之外緣;縱向支撐架(424)之一端係 、”。ό於後上支架(61)之外緣，其另端係結合於後下支架(62)之外 緣，縱向支撐架(425)之一端係結合於第一底支架(3丨)之外緣，其另 端係結合於第三樞連管⑼之外緣;縱向支樓架(π6)之一端係結合 於第底支架(31)之外緣，其另端係結合於第三極連管(53)之外 緣，且較第一底支架(31)更為靠近鏡射平面。 然後，請同時繼續參閱第一圖及第二圖，上述補強支樓架組(43) 中，補強支撐架(431)之上端係結合於第二樞連管(52)之外緣，其下 端係結合於橫向支樓架(414)之外緣尾端；補強支撐架(432)之上端 係結合於縱向切架(422)之外缘尾端，其下端係結合於橫向支撐 架_)之外緣尾端；補強支樓架(433)之上端係結合於縱向支撐架 (423) 之外緣中段處的接點(83〇)，其下端係結合於橫向支撐架(416) 之外緣；補強支撐架(434'435、及436)之各上端係結合於後上支 罙(61)之外緣’其各下端係結合於橫向支樓架(々Μ)之外緣；補強支 撐架(437)之上端係結合於橫向域架(415)之外緣，其下端係結合 於第三樞連管(53)之外，緣；補強支樓架(438、439)之各上端係結合 於後上支架(61)之外緣，其下端係分別結合於縱向支撐架(424)之外 緣中段及尾端；補強支撐架(44〇)之上端係結合於第一底支架 之外緣，其下端係結合於第二底支架(32)之外緣尾端。 請參閱第三圖，上述連桿組(56)中，補強連桿⑽兩端係連 8 M414377 結於鏡射排列之下前支架(12)外緣；補強連桿(562)兩端係連結於鏡 射排列之縱向支樓架(422)外緣，補強連桿(563)兩端係連結於鏡射 排列之縱向支撐架(423)外緣；補強連桿(564)兩端係連結於鏡射排 列之第一底支架(31)外緣；補強連桿(565)兩端係連結於鏡射排列之 第一底支架(31)外緣;補強連桿(566)兩端係連結於鏡射排列之第二 底支架(32)外缘。 請參閱第三圖，上述座管（20)上緣係穿設一-^合槽（201)，用以 卡接座塾。 更’請參閱第一圖，本創作包括一強化管(54)，用以強化多支架 及桿件接點處。 更，請參閱第一圖，本創作包括一鎖附桿(7〇)，其中段係穿設一 螺孔(71) ’用以螺接自行車反光片，該鎖附桿並以二v型管(72) 補強其結構。 【圖式簡單說明】 第1圖：係本創作較佳實施例之立體圖。 第2圖：係本創倾佳實刻之側視圖。 第3圖.係本創倾佳實施例之實錄態參考圖。 【主要元件符號說明】 10 則車管 11 上前支架 12 下前支架 9 20 座管 201 卡合槽 21 上座支架 22 下座支架 23 座補強桿 30 五通管 31 第一底支架 32 第二底支架 40 支撐部 41 橫向支撲架組 42 縱向支撐架組 43 補強支撐架組 50 連結組 51 第一樞連管 52 第二樞連管 53 第三樞連管 54 強化管 55 強化枢管 56 補強連桿組 60 後叉片組 61 後上支架 62 後下支架 64 後叉片 70 鎖附桿 71 螺孔 72 V型管 M414377 41 卜 412、413、414、415、416:橫向支撐架 421、422、423、424、425、426 :縱向支撐架 431 、 432 、 433 、 434 、 435 、 436 、 437 、 438 、 439 、 440 : 補強支撐架 56卜 562、563、564 ' 565、566 :補強連桿 A 前車管軸 A’ 座管軸 810、820、830、840 :接點M414377 V. New description: [New technical field] This creation relates to a bicycle frame structure, in particular to a bicycle frame structure comprising a multi-triangular space truss system component. [Prior Art] According to the structure design of the general bicycle frame, it is mainly made up of metal pipe body. The front pipe is provided with a front frame and a handle shaft assembly to make it have the effect of rotating control. The seat post is inserted under the seat cushion, and the insert is positioned by a bolt bundle clamp, and the transverse shaft tube is extended under the seat tube to assemble the crank shaft of the foot pedal, and at the rear end of the frame Then, the rear fork is arranged to set the rear axle, thereby arranging the bicycle frame, because it adopts a heavier iron metal pipe bundle, so the transportation cost is saved and the convenience of the rider is taken into consideration. The frame structure is mostly lightweight, but it is difficult to balance the stability during riding. [New content] It is difficult to balance the two relative advantages of light weight and stability, the shape of the space; ^ a variety of custom car frame structure 'its multi-triangular, so that the structure can strengthen the body structure strength and rigidity and stability Sex. =Two stresses, so that the bicycle frame structure can be provided when riding, and the material of the bicycle frame can be saved moderately, and the whole material can be improved. In order to achieve the above objectives, the bicycle frame of the creation includes: a front car tube, (4) a handlebar and a front fork pipe; a pipe, (4) Seat rod and seat cushion; one five=tube' is used to set the bicycle horizontal position; _ support part, the rib is connected to the front car Lu, the seat tube and the five-way pipe; - the connection group is used to connect the strengthened frame structure; After that, the film group is used for the axle shaft. The front vehicle f-axis and the seat tube shaft form a mirror surface, and the cut portion _ mirror surface is formed into a mine, and the branch portion includes: - a horizontal branch frame group 'i to the branch group, and a reinforcing support The frame group is a triangular mesh structure for assembling the bicycle frame structure of the present invention. The horizontal support frame group comprises six horizontal support frames; the longitudinal cut frame _ comprises six longitudinal support frames, the above-mentioned view frame _including the ten side social county, and the 强 支 支 支 向 向 向 向Slightly thin with the longitudinal support frame. The above-mentioned connection group includes: a first pivotal connection, a first pivotal linker, a third pivotal link, and a -strengthening pivotal pipe for pivoting the net money structure and the mirror projecting material; the i-tube is used to (10) The bracket and the rod are connected to the 'reinforcing link set for connecting the mirror parts. The above reinforcing link set includes five reinforcing links. According to a feature of the present invention, the outer edge of the front tube is connected to the upper front bracket, the lower side of the front axle is connected to the lower bracket, and the upper rigid bracket and the lower front bracket are mirrored to form a mirror, and The other end is bonded to the joint of the lateral support frame. According to another feature of the creation, the enhanced tow tube is threaded onto the longitudinal support frame. According to another feature of the present invention, the upper edge of the seat tube is connected to a support bracket and a reinforcing rod on the outer side of the seat tube, and the outer edge of the seat tube is under the health-τ seat line, and the upper seat and the lower seat bracket are mirrored by a mirror surface. The other end of the upper bracket is coupled to the joint of the one end of the horizontal branch frame M414377, and the lower end of the lower bracket is connected to the outer edge of the second light connecting tube. According to the creation of the side, the five culminating _ each connection - the first - the bottom branch 竿 Ζ Ζ second base branch L bottom branch _ second bottom _ _ face into a mirror shot ^ brother - Yi frame of the other end of the system - The outer edge of the pivotal pipe is attached to the joint of the outer edge of the reinforcing pivot pipe. According to another feature of the present invention, the rear fork piece set includes a rear upper bracket and a rear lower bracket supported by the rear lower bracket fine mirror surface mirroring, and the tail ends are connected - the rear fork piece' The rear upper bracket is coupled to the outer edge of the second pivoting tube, and the rear lower bracket is coupled to the joint of the outer edge of the reinforcing pivot tube. According to another feature of the present invention, the bicycle frame structure further includes a locking lever, and the middle portion is provided with a screw hole for screwing the bicycle reflector, and the locking domain reinforces the structure by a two-dimensional tube. The above-mentioned bicycle frame structure can provide good strength and rigidity, and the vehicle can withstand high stress evenly, so that the self-providing good elastic plate i' is also provided, because of the tubular structure of the creative component. ; Ji L, Shang ', so the overall material can be moderately saved * to achieve lightweight frame efficiency, to reduce relative costs, and improve handling. [Embodiment] Hereinafter, an embodiment of the present creation will be described with reference to the first to third figures. Please refer to both the first figure and the second figure. According to an embodiment of the present invention, the bicycle frame structure comprises: a front tube (10) 'for mounting the handlebar and the front fork tube; - seat & 2〇) 'Use the above seatpost and seat cushion; a five-way pipe (30) to set the bicycle to step 5 M414377 plate transverse shaft tube; a support part (40) for connecting the front axle (1〇 ), a seat tube (2〇) and a five-way tube (30); a connection group (50) for connecting the reinforced frame structure; and a rear fork group (60) for axially connecting the rear wheel shaft. The front axle tube (8) and the seat tube shaft form a mirror surface 'the branch portion (40) is mirrored on both sides by the mirror surface, and the branch portion (4〇) includes: a lateral support A frame group (41), a longitudinal support frame group (42), and a reinforcing support frame group (43) are used to assemble the triangular mesh truss structure of the bicycle frame structure of the present invention. The lateral support frame set (41) comprises six lateral support frames (411, 412, 413 '414, 415, 416); the longitudinal support frame set (42) comprises six longitudinal support frames (421 '422, 423) '424, 425, 426). The above-mentioned reinforcing support frame group (43) comprises ten reinforcing branch frames (431, 432, 433, 434, 435, 4.3, 437, 438, 438, 439, 440). The connecting group (5〇) includes: a first pivoting pipe (51), a second pivoting pipe (52), a third pivoting pipe (53), and a reinforcing pivot pipe (55) for The mesh structure and the mirror component are pivotally connected; a reinforcing link group (56) is used to connect the components of the mirrors on both sides. The above-mentioned reinforcing sample set (56) includes five reinforcing links (561, 562, 563, 564, brothers 5, 566). An upper front bracket (11) is connected to the upper edge of the outer side of the front axle (10), and a front bracket (12) is attached to the lower side of the outer edge of the front axle (10), the upper front bracket (11) and the lower front bracket ( 12) is mirrored by a mirror surface, and the other end is coupled to a joint (810) at one end of a lateral support frame (411). A seat bracket (21) and a reinforcing rod (23) are connected to the outer edge of the seat tube (2〇), and a lower bracket (22) is attached to the lower side of the outer edge of the seat tube (20), and the upper bracket (21) and The lower seat (22) is mirrored by a mirror surface, and the other end of the upper bracket (21) is coupled to a joint (810) at one end of a lateral support frame, and the lower bracket (22) The other ends of the seat reinforcing bars (23) are each connected to the outer edge of the second pivot pipe (52). The reinforcing pivot tube (55) M414377 is threaded through a longitudinal support frame (425). A first bottom bracket (31) and a second bottom bracket (32) are respectively connected to the two sides of the outer edge of the five-way pipe (30), and the first bottom bracket (31) and the second bottom bracket (32) are The mirror surface is mirrored, the other end of the first bottom bracket (31) is coupled to the outer edge of the first pivoting tube (51), and the other end of the second bottom bracket (32) is coupled to the reinforcing pivot tube (55) The junction of the outer edge (840). The rear fork set (60) includes a rear upper bracket (61) and a rear lower bracket (62), and the rear upper bracket (61) and the rear lower bracket (62) are mirror-finished. And a rear fork piece (64) is connected to the tail end, and the rear upper bracket (61) is coupled to the outer edge of the second pivot pipe (52), and the rear lower bracket (62) is at the other end. The joint (840) is bonded to the outer edge of the reinforcing pivot tube (55). Next, it can be seen from the second figure that in the above-mentioned lateral support frame group (41), the other end of the lateral support frame (411) is coupled to the joint (810); one end of the lateral support frame (412) is coupled to the joint ( 81〇), the other end is coupled to the outer edge of the second pivoting pipe (52); one end of the lateral supporting frame (413) is coupled to the outer edge of the lower front bracket (12), and the other end is coupled to the longitudinal direction a joint (82〇) at the middle edge of the outer edge of the support frame (422); one end of the lateral support frame (414) is combined with a joint _) at the middle edge of the outer edge of the longitudinal support frame (422), and the other The end system is coupled to the joint (830) at the middle edge of the longitudinal support frame (423); one end of the lateral support frame (415) is coupled to the joint at the middle edge of the longitudinal support frame (423) ( 83〇), the other end of the system 2 is in the outer edge of the longitudinal branch (424); the end of the lateral support frame _) is bonded to the outer edge of the first pivotal joint (8), and the other end is combined with the reinforcing pivot The joint on the outer edge of the tube (9) (840). '·'. Secondly, in the above-mentioned longitudinal branch frame group (10), the end of the longitudinal branch frame (421) is coupled to the outer edge of the lower front bracket (12), and the other end is coupled to the joint (81〇). Longitudinal support: 7 M414377 (422) One end is bonded to the joint (810), and the other end is coupled to the outer edge of the lateral support frame (416). One end of the longitudinal support frame (423) is coupled to the second pivot. The outer edge of the connecting pipe (52) is connected to the outer edge of the third connecting pipe (9); one end of the longitudinal supporting frame (424) is attached to the outer edge of the rear upper bracket (61). The other end is coupled to the outer edge of the rear lower bracket (62), one end of the longitudinal support frame (425) is coupled to the outer edge of the first bottom support (3丨), and the other end is coupled to the third pivotal tube (9) The outer edge; one end of the longitudinal support frame (π6) is coupled to the outer edge of the bottom support (31), and the other end is coupled to the outer edge of the third pole connecting pipe (53), and is smaller than the first bottom bracket (31) Closer to the mirror plane. Then, please continue to refer to the first figure and the second figure. In the above-mentioned reinforcing branch frame group (43), the upper end of the reinforcing support frame (431) is coupled to the second pivotal connection. The outer edge of the tube (52), the lower end of which is combined At the outer end of the lateral support frame (414); the upper end of the reinforcing support frame (432) is coupled to the outer end of the longitudinal cutting frame (422), and the lower end is coupled to the outer edge of the lateral support frame _) The end of the reinforcing support frame (433) is coupled to the joint (83〇) at the middle of the outer edge of the longitudinal support frame (423), and the lower end is coupled to the outer edge of the lateral support frame (416); The upper ends of the support frames (434'435, and 436) are coupled to the outer edge of the upper upper support cymbal (61), and the lower ends thereof are coupled to the outer edge of the lateral support frame (々Μ); the reinforcing support frame (437 The upper end is bonded to the outer edge of the transverse domain frame (415), the lower end of which is coupled to the third pivotal pipe (53), and the upper ends of the reinforcing support frame (438, 439) are coupled to the rear end. The outer edge of the upper bracket (61) is respectively coupled to the middle edge and the rear end of the outer edge of the longitudinal support frame (424); the upper end of the reinforcing support frame (44〇) is coupled to the outer edge of the first bottom bracket, The lower end is coupled to the outer end of the outer end of the second bottom bracket (32). Referring to the third figure, in the above link group (56), the reinforcing links (10) are connected at both ends with 8 M414377 knots under the mirror arrangement. support (12) outer edge; both ends of the reinforcing link (562) are connected to the outer edge of the longitudinally arranged longitudinal support frame (422), and the two ends of the reinforcing link (563) are connected to the longitudinal support frame of the mirror arrangement ( 423) an outer edge; the two ends of the reinforcing link (564) are connected to the outer edge of the first bottom bracket (31) arranged in a mirror; the two ends of the reinforcing link (565) are connected to the first bottom bracket of the mirror array ( 31) The outer edge; the reinforcing link (566) is connected at both ends to the outer edge of the second bottom bracket (32) which is mirror-arranged. Referring to the third figure, the upper edge of the seat tube (20) is provided with a fitting groove (201) for engaging the seat. Further, please refer to the first figure. This creation includes a reinforced tube (54) to reinforce the multi-stent and rod joints. Furthermore, please refer to the first figure. The creation includes a locking rod (7〇), wherein the segment is threaded with a screw hole (71) for screwing the bicycle reflector, and the locking rod is a two-v tube. (72) Reinforce its structure. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view of a preferred embodiment of the present invention. Figure 2: A side view of the original inspiration. Fig. 3 is a real-time reference picture of the embodiment of the present invention. [Main component symbol description] 10 car tube 11 upper front bracket 12 lower front bracket 9 20 seat tube 201 engagement groove 21 upper seat bracket 22 lower seat bracket 23 seat reinforcing rod 30 five-way pipe 31 first bottom bracket 32 second bottom Bracket 40 Supporting portion 41 Transverse support frame group 42 Vertical support frame group 43 Reinforcement support frame group 50 Connection group 51 First pivot pipe 52 Second pivot pipe 53 Third pivot pipe 54 Reinforcement pipe 55 Reinforcement pivot pipe 56 Reinforcement Link set 60 Rear fork set 61 Rear upper bracket 62 Rear lower bracket 64 Rear fork 70 Locking lever 71 Screw hole 72 V-shaped tube M414377 41 Bu 412, 413, 414, 415, 416: Lateral support frame 421, 422 , 423, 424, 425, 426: longitudinal support frames 431, 432, 433, 434, 435, 436, 437, 438, 439, 440: reinforcing support frame 56 562, 563, 564 '565, 566: reinforcing link A front axle A' seat tube shaft 810, 820, 830, 840: joint