201033069 六、發明說明： 【發明所屬之技術領域】 本發明是有關於一種機車結構，特別是有關於一種可 使煞車卡鉗與煞車碟盤之間的間隙大小固定之機車結構。 【先前技術】 請參閱第1圖及第2圖，一種習知之機車結構1主要 包括有一引擎10、一後搖臂20、一變速箱30、一輪圈40、 ❹一轴承50、一第一轴環61、一第二軸環62、一後輪轴70、 一煞車碟盤80及一煞車卡鉗90。 引擎10是連接於變速箱30,其可將輸出動力傳遞至變 速箱30内之齒輪傳動機構（未顯示）。 如第1圖所示，後搖臂20是接於引擎10。在此，如第 3圖所示，後搖臂20具有一軸承安裝部21及一環形凹槽 22 ° • 如第2圖所示，輪圈40是鄰接於變速箱30。煞車碟盤 80是藉由複數個螺栓B1之鎖附而與輪圈40固定在一起， 如此一來，煞車碟盤80便能與輪圈40同步轉動。 如第2圖及第3圖所示，軸承50是安裝於後搖臂20 之軸承安裝部21之中。在此，軸承50是由一外環51、一 内環52及複數個滾珠53所組成，外環51是抵接於軸承安 裝部21，内環52是套設於外環51之中，以及複數個滾珠 53是在外環51與内環52之間滚動。此外，如第3圖所示， * 在軸承50安裝於轴承安裝部21之中後，一 C型扣環95 201033069 會套設於環形凹槽22之中，以避免軸承50從轴承安裝部 21脫落。 如第2圖及第3圖所示，第一軸環61是設置於輪圈40 與軸承50之間，而第二軸環62是連接於軸承50。 後輪軸70是從變速箱30内之齒輪傳動機構延伸而 出，並且後輪軸70乃是依序穿設於輪圈40、第一轴環61、 轴承50之内環52及第二軸環62之中。此外，一定位螺帽 ® 96是鎖附於後輪轴70之上，並且定位螺帽96是抵緊於第 二轴環62，如此即可使得後輪轴70、輪圈40、第一轴環 61、軸承50之内環52及第二軸環62固定在一起。另外， 由於轴承50之内環52是與後輪軸70固定在一起，故軸承 50之内環52會隨著輪圈40同步轉動。此外，如第1圖所 示，後搖臂20是連接於引擎10與後輪軸70之間。 如第2圖所示，煞車卡鉗90是藉由複數個螺栓B2之 鎖附而與後搖臂20固定在一起，以及煞車碟盤80之外緣 ❿ 部份是套設於煞車卡鉗90之中。煞車卡鉗90可受驅動而 夾持煞車碟盤80之外緣部份，以達成對輪圈40煞車之效 果。 然而，在轴承50安裝於後搖臂20之軸承安裝部21之 中後，雖然已利用C型扣環95之限制來防止軸承50從軸 承安裝部21脫落，但此種方法對於後搖臂20設置有煞車 卡鉗90之機車結構1並不適用。更具體而言，對於後搖臂 20設置有煞車卡鉗90之機車結構1而言，煞車卡钳90與 201033069 煞車碟盤80之間隙的設計公差分別是由煞車碟盤80、輪 圈40、第一軸環61、軸承50、軸承安裝部21、環形凹槽 22、C型扣環95及後搖臂20至煞車卡钳90之公差所累加 而成。如上所述，一旦軸承50因引擎10震動等因素而發 生外移，如第4圖所示，煞車卡鉗90與輪圈40之間的距 離將會拉近，因而會改變煞車卡甜90與煞車碟盤80之間 的間隙大小，進而會影響煞車性能表現。此外，由於C型 扣環95在合理公差設計下不易縮小公差設計，故必須另求 ® 其他方法來讓設計合理化。 【發明内容】 本發明基本上採用如下所詳述之特徵以為了要解決上 述之問題。 本發明之一實施例提供一種機車結構，其包括一引 擎；一變速箱，連接於該引擎；一後搖臂，連接於該引擎， 並且具有一軸承安裝部及一内螺紋部，其中，該内螺紋部 ❿ 係成形於該轴承安裝部之中；一軸承，設置於該後搖臂之 該軸承安裝部之中；一中空螺塞，旋鎖於該後搖臂之該内 螺紋部，並且抵緊於該軸承；一輪圈；一第一軸環，設置 於該輪圈與該軸承之間；一第二軸環，連接於該軸承，並 且穿設於該中空螺塞之中；一後輪軸，連接於該變速箱， 並且依序穿設於該輪圈、該第一轴環、該軸承及該第二轴 環之中，其中，該後輪轴具有一外螺紋部；一定位螺帽， 旋鎖於該後輪軸之該外螺紋部，並且抵緊於該第二軸環； 一煞’車碟盤，連接於該輪圈；以及一煞車卡鉗，連接於該 201033069 後搖臂，並且套設於該煞車碟盤之上。 本發明之另一實施例提供一種機車結構，其包括〜^ 擎；一變速箱，連接於該引擎；一後搖臂，連接於該引擎， 並且具有一中空柱及一第一外螺紋部，其中，該第一外螺 紋部係成形於該中空柱之上；一第一定位螺帽，旋鎖於該 後搖臂之該第一外螺紋部’並且具有一轴承安裝部；一轴 承’設置於該第一定位螺帽之該軸承安裝部之中，並且抵 ❹接於該第一定位螺帽與該後搖臂之該中空柱之間；一輪 圈；一第一軸環，設置於該輪圈與該軸承之間；一第二輛 1辰’連接於該軸承’並且穿設於該中空枉之中；一後輪軸， 連接於該變速箱’並且依序穿設於該輪圈、該第一軸環、 該車由承及該第二軸環之中，其中，該後輪軸具有一第二外 螺紋部；一第二定位螺帽，旋鎖於該後輪軸之該第二外螺 紋部，並且抵緊於該第二軸環；一煞車碟盤，連接於該輪 圈’以及一煞車卡鉗，連接於該後搖臂，並且套設於該煞 ® 車項盤之上。 為使本發明之上述目的、特徵和優點能更明顯易懂， 下文特舉較佳實施例並配合所附圖式做詳細說明。 【實施方式】 兹配合圖式說明本發明之較佳實施例。 第一實施例 D月參閱第5圖及第6圖，本實施例之機車結構1〇〇主 要包括有—5丨擎110、—變速箱〗20、·一後搖臂13〇、一軸 201033069 140 λ — Φ ^ xm ^ r二螺塞150、一輪圈160、〜 第二轴環也一後輪軸180、_定位螺環171、 盤195及—斂由』 饥螺帽19〇、 煞車 碟盤195及1車卡鉗196 遞至 、引擎110是連接於變速箱120,其可將私 變速箱120内之齒輪傳動機構(未顯示）。^動力傳 後搖臂130是連接於引擎110。如第6 130具有—h 系6圖所示 軸承文襞部131及一内螺紋部 後搖臂201033069 VI. Description of the Invention: [Technical Field] The present invention relates to a locomotive structure, and more particularly to a locomotive structure capable of fixing a gap between a brake caliper and a brake disc. [Prior Art] Referring to Figures 1 and 2, a conventional locomotive structure 1 mainly includes an engine 10, a rear rocker arm 20, a gearbox 30, a rim 40, a first bearing 50, and a first shaft. The ring 61, a second collar 62, a rear axle 70, a brake disc 80 and a brake caliper 90. The engine 10 is coupled to a gearbox 30 that transmits output power to a gearing mechanism (not shown) within the transmission 30. As shown in FIG. 1, the rear rocker arm 20 is connected to the engine 10. Here, as shown in Fig. 3, the rear rocker arm 20 has a bearing mounting portion 21 and an annular groove 22 °. As shown in Fig. 2, the rim 40 is adjacent to the transmission case 30. The brake disc 80 is fixed to the rim 40 by the locking of a plurality of bolts B1, so that the brake disc 80 can rotate synchronously with the rim 40. As shown in FIGS. 2 and 3, the bearing 50 is mounted in the bearing mounting portion 21 of the rear rocker arm 20. Here, the bearing 50 is composed of an outer ring 51, an inner ring 52 and a plurality of balls 53, the outer ring 51 abuts against the bearing mounting portion 21, and the inner ring 52 is sleeved in the outer ring 51, and A plurality of balls 53 roll between the outer ring 51 and the inner ring 52. Further, as shown in FIG. 3, after the bearing 50 is mounted in the bearing mounting portion 21, a C-shaped retaining ring 95 201033069 is sleeved in the annular groove 22 to prevent the bearing 50 from being mounted from the bearing mounting portion 21. Fall off. As shown in FIGS. 2 and 3, the first collar 61 is disposed between the rim 40 and the bearing 50, and the second collar 62 is coupled to the bearing 50. The rear axle 70 extends from the gear transmission mechanism in the transmission 30, and the rear axle 70 is sequentially passed through the rim 40, the first collar 61, the inner ring 52 of the bearing 50, and the second collar 62. Among them. In addition, a positioning nut® 96 is attached to the rear axle 70, and the positioning nut 96 is abutted against the second collar 62, so that the rear axle 70, the rim 40, the first axle The ring 61, the inner ring 52 of the bearing 50 and the second collar 62 are fixed together. In addition, since the inner ring 52 of the bearing 50 is fixed to the rear axle 70, the inner ring 52 of the bearing 50 rotates synchronously with the rim 40. Further, as shown in Fig. 1, the rear rocker arm 20 is coupled between the engine 10 and the rear axle 70. As shown in Fig. 2, the brake caliper 90 is fixed to the rear rocker arm 20 by the locking of a plurality of bolts B2, and the outer edge of the brake disc 80 is partially sleeved in the brake caliper 90. . The brake caliper 90 can be driven to grip the outer edge portion of the brake disc 80 to achieve the effect of braking the rim 40. However, after the bearing 50 is mounted in the bearing mounting portion 21 of the rear rocker arm 20, although the restriction of the C-shaped retaining ring 95 has been utilized to prevent the bearing 50 from coming off the bearing mounting portion 21, this method is for the rear rocker arm 20 The locomotive structure 1 provided with the brake caliper 90 is not suitable. More specifically, for the locomotive structure 1 in which the rear rocker arm 20 is provided with the brake caliper 90, the design tolerances of the gap between the brake caliper 90 and the 201033069 brake disc 80 are respectively the brake disc 80, the rim 40, and the first The tolerances of the collar 61, the bearing 50, the bearing mounting portion 21, the annular groove 22, the C-shaped retaining ring 95, and the rear rocker arm 20 to the brake caliper 90 are added. As described above, once the bearing 50 is moved outward due to factors such as the vibration of the engine 10, as shown in Fig. 4, the distance between the brake caliper 90 and the rim 40 will be close, and thus the brake card sweet 90 and the brake will be changed. The size of the gap between the discs 80, which in turn affects the performance of the brakes. In addition, because the C-type retaining ring 95 is not easy to reduce tolerance design under reasonable tolerance design, it is necessary to find another way to rationalize the design. SUMMARY OF THE INVENTION The present invention basically employs the features detailed below in order to solve the above problems. An embodiment of the present invention provides a locomotive structure including an engine; a gearbox coupled to the engine; a rear rocker arm coupled to the engine, and having a bearing mounting portion and an internal thread portion, wherein a female threaded portion is formed in the bearing mounting portion; a bearing is disposed in the bearing mounting portion of the rear rocker arm; a hollow screw plug is screwed to the internal thread portion of the rear rocker arm, and Resisting the bearing; a rim; a first collar disposed between the rim and the bearing; a second collar coupled to the bearing and threaded into the hollow plug; An axle, coupled to the gearbox, and sequentially disposed in the rim, the first collar, the bearing and the second collar, wherein the rear axle has an external thread portion; a positioning screw a cap that is screwed to the external threaded portion of the rear axle and abuts against the second collar; a 'disc disc attached to the rim; and a brake caliper coupled to the rear rocker arm of 201033069, And set on the brake disc. Another embodiment of the present invention provides a locomotive structure including: a gearbox coupled to the engine; a rear rocker arm coupled to the engine and having a hollow post and a first external threaded portion, Wherein the first external thread portion is formed on the hollow column; a first positioning nut is screwed to the first external thread portion of the rear rocker arm and has a bearing mounting portion; a bearing set In the bearing mounting portion of the first positioning nut, and abutting between the first positioning nut and the hollow column of the rear rocker arm; a rim; a first collar disposed at the Between the rim and the bearing; a second one is connected to the bearing 'and is inserted in the hollow cymbal; a rear axle is coupled to the gearbox' and is sequentially disposed on the rim, The first collar, the vehicle is supported by the second collar, wherein the rear axle has a second external thread portion; a second positioning nut is screwed to the second outer portion of the rear axle a threaded portion and abutting against the second collar; a brake disc attached to the rim A brake caliper is connected to the rear swing arm, and a sleeve is disposed on the evil ® disc drive entries. The above described objects, features and advantages of the present invention will become more apparent from the description of the appended claims. [Embodiment] A preferred embodiment of the present invention will be described with reference to the drawings. Referring to FIG. 5 and FIG. 6 in the first embodiment, the locomotive structure 1 of the present embodiment mainly includes a -5 engine 110, a gearbox 20, a rear rocker arm 13〇, and a shaft 201033069 140. λ — Φ ^ xm ^ r two screw plugs 150, one wheel 160, ~ second shaft ring also a rear wheel shaft 180, _ positioning screw ring 171, disk 195 and - condensed by hunger nut 19 〇, brake disc 195 And the 1 caliper 196 is delivered to, the engine 110 is coupled to the transmission 120, which can drive a gearing mechanism (not shown) within the private transmission 120. ^ Power Transmission Rear rocker arm 130 is coupled to engine 110. For example, the 6th 130 has a -h system 6 and a bearing arm portion 131 and an internal thread portion.
P132疋成形於軸承安裝部131之中。 以及内螺紋 軸承14〇是設置於後搖冑13〇之軸承安 ’轴承140是由一外環⑷、Ί3!之中。 珠M3所組成，外瑗141 β 4地 環及複數個滾 142 θ ^ 卜裱141疋抵接於軸承安裝部U1，内環 产14免於外環141之中，以及複數個滾珠M3是在外 裱⑷與内環U2之間滾動。 疋隹 日+处&螺塞I50是旋鎖於後搖臂130之内螺紋部132,並 二螺塞150是抵緊於轴承14〇(之外環141)，如此一 果，軸承140之位置即可被固定。 輪圈160是鄰接於變逮箱12〇。 第〜軸裱171是設置於輪圈16〇與軸承14〇之間。 β第〜軸環172疋連接於輛承14〇，並且第二軸環m 疋穿設於中空螺塞15〇之中。 ，輪轴180是連接於變逮_ 12()。更具體而言，後輪轴 疋攸變速相120内之齒輪傳動機構延伸而出，並且後 *軸18〇乃是依序穿没於輪圈16〇、第一轴環m、轴承 8 201033069 140及第二軸環i72 紋部181。 此外，後輪軸180具有一外螺 ，：螺帽⑽是旋鎖於後輪軸 且疋位螺帽190是抵緊 卜螺’並 輪轴18〇、輪® 16〇、笛、第轴》172,如此即可使得後 e 及第二軸環172固定矛一一軸％ 171、軸承140之内環142 H2是與後輪軸18〇 j。另外，由於轴承_之内環 會隨著輪圈⑽同步魅：在一起，故轴承140之内請 ^接㈣嶋’後搖臂 6 HI二車碟盤195疋連接於輪圈160。更詳細的來文，如第 ό圖所示，煞車碟盤θ计、又叶阳扪采說，如第 輪圈16G ϋ定在—起讀域數侧栓B1之鎖附而與 圈_同步轉動。，如此一來，煞車碟盤195便能與輪 車卡钳酬疋連接於後⑽ 是套設於煞車碟盤19S t 且”、、單卡鉗19ό 煞車卡請是藉由複二(:緣部份)上。更詳細的來說， 固定在-起。煞車卡=螺栓Β2之鎖附而與後搖㈣ 之外緣赞，以、^ 可受驅動而失持煞車碟盤195 外緣^料柄輪® 160齡之效果。 如士所述由於轴承14〇是藉由中空螺塞15〇之旋鎖 子固定在後搖臂130之軸承安裝部131與中空螺塞15〇 之間’故轴承Η0不會因震動而發生軸向移動，因而不會 改變煞車切！96與輪圈⑽之間㈣離，進而可固μ 車卡鉗19 6與煞車碟盤19 5之間的間隙大小。換句話說， 由於轴承Η0是被固定在後搖臂13〇之轴承安裝部⑶愈 201033069 中空螺塞15G之間，故内螺紋部132和中空螺塞的 造公差並不會影響到煞車袖196至輪圈⑽之距離的計 算公差’因而可相對縮小累計公差數值，進錢不會使煞 車性能受到影響。 第二實施例P132 is formed in the bearing mounting portion 131. And the internally threaded bearing 14A is a bearing disposed on the rear rocker 13'. The bearing 140 is formed by an outer ring (4), Ί3! The bead M3 is composed of a 瑗 β β β β 4 ring and a plurality of rollers 142 θ ^ 裱 裱 裱 疋 疋 abut the bearing mounting portion U1, the inner ring 14 is free from the outer ring 141, and the plurality of balls M3 are outside裱 (4) and the inner ring U2 roll. The next day + position & screw plug I50 is screwed to the inner threaded portion 132 of the rear rocker arm 130, and the two screw plug 150 is abutted against the bearing 14 〇 (outer ring 141), so that the bearing 140 The position can be fixed. The rim 160 is adjacent to the variable box 12A. The first axis 171 is disposed between the rim 16〇 and the bearing 14〇. The β-th collar 172 is connected to the carrier 14 〇, and the second collar m 疋 is bored in the hollow plug 15 。. The axle 180 is connected to the variable _ 12 (). More specifically, the gear transmission mechanism in the rear axle 疋攸 shift phase 120 extends out, and the rear axle 18 〇 is sequentially worn on the rim 16 〇, the first collar m, the bearing 8 201033069 140 And a second collar i72 rib 181. In addition, the rear axle 180 has an outer screw, the nut (10) is screwed to the rear axle and the clamp nut 190 is abutting the screw 'and the axle 18 〇, the wheel® 16 〇, the flute, the first shaft 172, Thus, the rear e and the second collar 172 are fixed to the spear-shaft % 171, and the inner ring 142 H2 of the bearing 140 is coupled to the rear axle 18 〇 j. In addition, since the inner ring of the bearing _ will be synchronized with the rim (10), the bearing 140 is connected to the rear wheel rocker 6 HI and the rear wheel rocker 6 HI is connected to the rim 160. More detailed communication, as shown in the figure, the car disc θ meter, and Ye Yangshao said, such as the first wheel 16G ϋ 在 — — 读 读 读 读 侧 侧 侧 同步 同步 同步 同步 同步 同步Turn. In this way, the brake disc 195 can be connected to the wheel caliper rewards (10) is set on the brake disc 19S t and ",, single caliper 19 ό 煞 car card by the second (: edge part In more detail, it is fixed at - from. The car card = bolt Β 2 lock and the rear shake (four) outside the edge, to, ^ can be driven and lost the brake disc 195 outer edge ^ handle The effect of the wheel® 160 years old. As described in the article, the bearing 14〇 is fixed between the bearing mounting portion 131 of the rear rocker arm 130 and the hollow screw plug 15〇 by the screw lock of the hollow screw plug 15〇, so the bearing Η0 There is no axial movement due to vibration, so the gap between the 96 and the rim (10) is removed, and the gap between the caliper 19 6 and the brake disc 19 5 can be fixed. In other words Since the bearing Η0 is fixed between the bearing mounting portion (3) of the rear rocker arm 13〇 and the 201033069 hollow screw plug 15G, the tolerance of the female thread portion 132 and the hollow screw plug does not affect the brake sleeve 196 to the rim. (10) The calculated tolerance of the distance 'so the relative tolerance value can be relatively reduced, and the money will not affect the braking performance. Second embodiment
請參閱第7圖及第8圖，本實施例之機車結構200主 要包括有-引擎210、一變速箱22〇、一後搖臂23〇、一第 一定位螺帽240、一軸承25〇、一輪圈26〇、一第一軸環271、 一第二軸環272、—後輪軸280、一第二定位螺帽290、一 煞車碟盤295及一煞車卡鉗296。 引擎210是連接於變速箱22〇，其可將輸出動力傳遞至 變速箱220内之齒輪傳動機構(未顯示）。 後搖臂230是連接於引擎21〇β如第8圖所示，後搖臂 230具有一中空柱231及一第一外螺紋部232,以及第一外 螺紋部232是成形於中空柱231之上。 第一定位螺帽240是旋鎖於後搖臂230之第一外螺紋 部232 ’並且第一定位螺帽24〇具有一軸承安裝部241。 轴承250是設置於第一定位螺帽24〇之軸承安裝部241 之中。在此，藉由第一定位螺帽240之旋鎖，軸承250乃 是抵接（緊）於第一定位螺帽24〇與後搖臂23〇之中空柱 231(之一環形定位面231a)之間。此外，軸承25〇是由一外 環251 内環252及複數個滾珠253所組成，外環251 是抵接於軸承安裝部241與中空柱231(之環形定位面231a) 201033069 之間’内環2U是套設於外環251之中，以及複數個滾珠 253是在外環251與内環252之間滚動。 輪圈260是鄰接於變速箱220。 第一軸環271是設置於輪圈26〇與軸承25〇之間。 第二轴環272是連接於軸承25〇，並且第二軸環 是穿設於中空柱231之中。 後輪軸280是連接於變速箱22〇。更具體而言，後輪軸 參280是從變速箱22〇内之齒輪傳動機構延伸而出，並且後 輪軸280是依序穿設於輪圈26〇、第一軸環271、軸承 及第二轴環272之中。此外，後輪軸28〇具有一第二外螺 紋部281。 ’、 第二定位螺帽290是旋鎖於後輪轴28〇之第二外螺紋 部281，並且第二定位螺帽29〇是抵緊於第二轴環a]，如 此即可使得後輪轴280、輪圈26〇、第一軸環271、軸承25〇 之内環252及第二轴環272固定在一起。另外，由於轴承 ❹M0之内環252是與後輪軸⑽狀在一起，故轴承25〇 之内環252會隨著輪圈260同步轉動。此外，如第7圖所 不，後搖臂230是連接於引擎21〇與後輪軸28〇之間。 煞車碟盤295是連接於輪圈26〇β更詳細的來說，如第 8圖所不’煞車碟盤295是藉由複數個螺栓m之鎖附而與 輪圈260固定在一起’如此-來，煞車碟盤295便能與輪 圈260同步轉動。 ” 煞車卡鉗296是連接於後搖臂230，並且煞車卡鉗296 · 201033069 是套設於煞車碟盤295之（外緣部份;)上。更詳細的來說， 煞車卡鉗296是藉由複數個螺栓B2之鎖附而與後搖臂230 固定在一起。熟車卡鉗2%可受驅動而夾持煞車碟盤295 之外緣部份，以達成對輪圈260煞車之效果。 如上所述’由於軸承250是藉由第一定位螺帽240之 旋鎖而被固定在第一定位螺帽24〇與後搖臂23〇之中空柱 231(之環形定位面231a)之間，故軸承25〇不會因震動而發 生軸向移動，因而不會改變煞車卡鉗296與輪圈260之間 的距離，進而可固定煞車卡钳296與煞車碟盤295之間的 間隙大小。換句話說，由於軸承25〇之位置是由中空柱 231(之％形定位面231a)所決定，故不論第一定位螺帽 之轴承安裝部241之加工深淺或後搖臂23〇之第一外螺紋 部232之位置為何’煞車卡鉗296與輪圈260之間的距離 都不會文到影響’進而不會使煞車性能受到影響。 雖然本發明已以較佳實施例揭露於上，然其並非用以 ❹限定本發明’任何熟習此項技藝者，在不脫離本發明之精 神和範圍内，當可作些許之更動與濶飾，因此本發明之保 護範圍當視後附之申請專利範圍所界定者為準。 12 201033069 【圖式簡單說明】 圖係顯示—種習知之機車結構之部份平面示意圖; 第2圖係顯示根據第！圖之一種A_A剖面示意圖； 第3圖係顯示根據第2圖之部份放大示意圖； 第4圖係顯示根據第1圖之另一種A-A剖面示意圖； 第5圖係顯示本發明之第一實施例之機車結構之部份 平面示意圖； 鲁 第6圖係顯示根據第5圖之A，-A，剖面示意圖； 第7圖係顯示本發明之第二實施例之機車結構之部份 平面示意圓；以及 第8圖係顯示根據第7圖之A，，_A，，剖面示意圖。 【主要元件符號說明】 1、100、200〜機車結構 10、110、210〜引擎 20、 130、230〜後搖臂 21、 131、241〜軸承安裝部 22〜環形凹槽 30、120、220〜變速箱 40、160、260〜輪圈 50、 140、250〜軸承 51、 141、251 〜外環 13 201033069 52、 142、252〜内環 53、 143、253〜滾珠 61、 171、271〜第一軸環Referring to FIG. 7 and FIG. 8 , the locomotive structure 200 of the present embodiment mainly includes an engine 210 , a gearbox 22 , a rear rocker arm 23 , a first positioning nut 240 , and a bearing 25 . A wheel rim 26 〇, a first collar 271, a second collar 272, a rear axle 280, a second positioning nut 290, a brake disc 295 and a brake caliper 296. The engine 210 is coupled to a gearbox 22 that transmits output power to a gearing mechanism (not shown) within the transmission 220. The rear rocker arm 230 is connected to the engine 21 〇β. As shown in FIG. 8, the rear rocker arm 230 has a hollow column 231 and a first external thread portion 232, and the first external thread portion 232 is formed on the hollow column 231. on. The first positioning nut 240 is screwed to the first male threaded portion 232' of the rear rocker arm 230 and the first positioning nut 24'' has a bearing mounting portion 241. The bearing 250 is disposed in the bearing mounting portion 241 of the first positioning nut 24''. Here, by the rotation of the first positioning nut 240, the bearing 250 is abutting (closed) to the hollow post 231 of the first positioning nut 24〇 and the rear rocker arm 23〇 (one annular positioning surface 231a) between. In addition, the bearing 25A is composed of an outer ring 251 inner ring 252 and a plurality of balls 253, and the outer ring 251 abuts between the bearing mounting portion 241 and the hollow column 231 (the annular positioning surface 231a) 201033069 'inner ring 2U is sleeved in the outer ring 251, and a plurality of balls 253 are rolled between the outer ring 251 and the inner ring 252. The rim 260 is adjacent to the gearbox 220. The first collar 271 is disposed between the rim 26〇 and the bearing 25〇. The second collar 272 is coupled to the bearing 25A and the second collar is disposed within the hollow post 231. The rear axle 280 is coupled to the gearbox 22A. More specifically, the rear axle reference 280 extends from the gear transmission mechanism in the gearbox 22, and the rear axle 280 is sequentially threaded through the rim 26, the first collar 271, the bearing, and the second axle. In the ring 272. Further, the rear axle 28 has a second outer thread portion 281. ', the second positioning nut 290 is screwed to the second external thread portion 281 of the rear wheel axle 28, and the second positioning nut 29A is abutted against the second collar a], so that the rear wheel The shaft 280, the rim 26, the first collar 271, the inner ring 252 of the bearing 25, and the second collar 272 are fixed together. Further, since the inner ring 252 of the bearing ❹ M0 is shaped like the rear wheel shaft (10), the inner ring 252 of the bearing 25 会 rotates synchronously with the rim 260. Further, as shown in Fig. 7, the rear rocker arm 230 is coupled between the engine 21A and the rear axle 28A. The brake disc 295 is connected to the rim 26 〇β. In more detail, as shown in Fig. 8, the brake disc 295 is fixed to the rim 260 by the locking of a plurality of bolts m. The brake disc 295 can be rotated in synchronism with the rim 260. The brake caliper 296 is coupled to the rear rocker arm 230, and the brake caliper 296 · 201033069 is sleeved on the outer disk portion 295 (outer edge portion;). In more detail, the brake caliper 296 is by a plurality of The bolt B2 is locked and fixed to the rear rocker arm 230. The brake caliper 2% can be driven to grip the outer edge portion of the brake disc 295 to achieve the effect of braking the rim 260. Since the bearing 250 is fixed between the first positioning nut 24〇 and the hollow post 231 (the annular positioning surface 231a) of the rear rocker arm 23 by the twist lock of the first positioning nut 240, the bearing 25〇 The axial movement does not occur due to the vibration, so the distance between the brake caliper 296 and the rim 260 is not changed, and the gap between the brake caliper 296 and the brake disc 295 can be fixed. In other words, due to the bearing 25 The position of the crucible is determined by the hollow post 231 (the %-shaped positioning surface 231a), so regardless of the processing depth of the bearing mounting portion 241 of the first positioning nut or the position of the first external thread portion 232 of the rear rocker arm 23〇 'The distance between the brake caliper 296 and the rim 260 will not be obvious. The invention is not affected by the present invention. The scope of protection of the present invention is subject to the definition of the scope of the appended patent application. 12 201033069 [Simple description of the diagram] The diagram shows the part of the locomotive structure Figure 2 is a schematic view showing a cross section of the A_A according to the Fig.; Fig. 3 is a schematic enlarged view of a portion according to Fig. 2; Fig. 4 is a schematic cross-sectional view showing another AA according to Fig. 1; Figure 5 is a partial plan view showing the structure of the locomotive according to the first embodiment of the present invention; Figure 6 is a cross-sectional view showing A, -A according to Figure 5; and Figure 7 is a second view showing the present invention. A part of the plane structure of the locomotive structure of the embodiment is shown in a schematic circle; and FIG. 8 is a schematic cross-sectional view of the A, _A, and Fig. 7 according to Fig. 7. [Description of main components] 1, 100, 200~ locomotive structure 10, 110 210 to engine 20, 130, 230 to rear rocker arms 21, 131, 241 to bearing mounting portion 22 to annular grooves 30, 120, 220 to gearbox 40, 160, 260 to rim 50, 140, 250 to bearing 51 , 141, 251 ~ outer ring 13 201033069 52, 142, 252 ~ inner ring 53, 143, 253 ~ ball 61, 171, 271 ~ first collar
62、 172、272〜第二軸環 70、180、280〜後輪軸 80、195、295〜煞車碟盤 90、196、296〜煞車卡钳 95〜C型扣環 96、190〜定位螺帽 132〜内螺紋部 150〜中空螺塞 181〜外螺紋部 231〜中空柱 23la〜環形定位面 232〜第一外螺紋部 240〜第一定位螺帽 281~第二外螺紋部 290〜第二定位螺帽 Bl、B2〜螺栓 1462, 172, 272~ second collar 70, 180, 280~ rear axle 80, 195, 295~ brake disc 90, 196, 296~ brake caliper 95~C buckle 96, 190~ positioning nut 132~ Female screw portion 150 to hollow screw plug 181 to male screw portion 231 to hollow post 23la to annular positioning surface 232 to first male screw portion 240 to first positioning nut 281 to second external thread portion 290 to second positioning nut Bl, B2~Bolt 14