六、發明說明： 【發明所屬之技術領域】 本發明是有關於-種兩前輪車輛，特別是指—種具有 兩前輪車輛之防止傾倒裝置。 、 【先前技術】 現有的機車具有一後輪，及一與該後輪位於同一轴線 上的前輪，藉由這種不穩定的設計雖然換來了操作的靈敏 性’但=相對的也就犧牲了騎乘時的穩定性，使得騎士必 須要依罪自身的平衡感來操控機車以避免機車傾倒，因此 ，年紀稍長或是平衡感較差者都不適合騎乘機車。 相關業者為了增加現有機車的穩定性，近年來積極著 手研發結合汽車穩定性與機車操控性的混合（hybrid)型車輛 ’例如中華民國公告第4_9號所揭露之「具有兩前駕驶 輪之三輪車輛」，與第93115455號發明專利申請案所揭露的 「具有兩前輪轉向的三輪滾動車輛」，皆利用兩前輪與一後 輪的設計，使騎士在騎乘時能兼具機車的操控性與汽車的 穩定性。 為了使兩前輪能同時受控制地相對地面擺動或轉動， 上述車輛皆是利用一四連桿機構以同時控制該二前輪相對 地面擺動或轉動，但是，幕所周知，四連桿機構的四個連 接处疋相互樞接，因此，在低速或是停車時，該四連桿機 構會產生搖擺進而引起車輛傾倒，因此相關業者研發出如 令華民國第94102972號發明專利申請案所揭露的防搖擺裝 no ’利用相互配合設置的鎖定碟盤與鎖定卡鉗，及一用以 1378056 拉動該鎖定卡鉗的馬達以適時鎖定該四連桿機構，避免車 輛因該四連桿機構的搖擺而傾倒，但是，由於該防搖擺果 置的鎖定碟盤與鎖定卡鉗須相互對應設置，在安裝上較為 繁瑣，此外還需利用馬達加以驅動該鎖定卡鉗，構件繁多 影響車輛的空間配置。 【發明内容】 因此，本發明之目的，即在提供一種具有兩前輪車輛 之防止傾倒裝置。 於是，本發明具有兩前輪車輛之防止傾倒裝置，該具 有兩前輪車輛包括一個具有一中空狀定位件的車架、二與 Z位件對應設置㈣輪單元，及控㈣前輪單元 轉向早疋。該防止傾倒裝置包含—個傾斜單元及 用以鎖定該傾斜單元的鎖定單元。 該傾斜單元是㈣於蚊位件上，其中，該前輪單元 2 =位於該定位件兩相反側且樞設於該傾斜單元 心_’及二個分別樞設於相對應之懸吊機構上的 月』二該轉向單元具有一根枢轉地穿置至於該定位件中 •干，及-個連動該操縱桿與該二懸吊機構的轉向機 機構，，該―二 二,間移動，當該液壓鎖定機構位於非鎖定位置 鎖定:置:相Γ定位件傾“ 時可以鎖定該傾斜單元防止該傾斜單元相對. 4 定位件傾斜。 本發明之功效在於利用能在該非鎖定位置與該鎖定位 置間移動的液壓鎖定播播 w 領疋機構’控制該傾斜單元能否相對該定 料— Μ鎖疋該傾斜早π避免因傾斜單元相 對該疋位件傾斜而造成令右 Μ„ 成°玄具有兩刚輪車輛傾倒，整體結構 :早π但此有效簡化安裝程序，也能減少空間的浪費。 【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 以下配合參考圖式之二個較佳實施例的詳 清楚的呈現。 Τ π 1 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。 閱圖1 2纟發旎a月具有兩前輪車輛之防止傾隹裝 置之第-較佳實施例是安裝於一具有兩前輪車輛2上。 該具有兩前輪車辆2包括—個具有—中空；t位件211的 車架21、一與該定位件211對應設置的前輪單元23，及一 用以控制該前輪單元23的轉向單元24。 而該防止傾倒裝置包含一個樞設於該定位件211上的傾 斜單兀22,及一用於鎖定該傾斜單元22的鎖定單元25。 «亥7[員斜單元22具有二根分別間隔植設於該定位件211 上的傾斜連桿221、兩根分別樞設於所述傾斜連桿221兩相 反端的傾斜側管222，及一根樞設於該定位件211上且兩端 是分別與該二傾斜側管222滑動地樞接的連動桿223，其中 ，每一根傾斜連桿221是區分為二個兩端分別樞設於該定 1378056 位件211與相對應之傾斜側管222的對接桿部224，而該連 動桿223的兩端形成有可供相對應之傾斜側管222滑動樞 接的滑動槽225。 該前輪單元23具有兩個分別位於該定位件2n兩相反 側且樞設於該傾斜單元22上的懸吊機構231，及二個分別 樞設於相對應之懸吊機構231上的前輪232，其中，每一懸 吊機構231皆具有一根樞轉地穿設於相對應之傾斜側管222 中的刚叉桿233、一個設置於該前又桿 234 233上的結合座VI. Description of the Invention: [Technical Field] The present invention relates to a two-wheeled vehicle, and more particularly to a dumping prevention device having two front wheel vehicles. [Prior Art] The existing locomotive has a rear wheel and a front wheel on the same axis as the rear wheel. With this unstable design, the operational sensitivity is changed, but the relative sacrifice is also sacrificed. The stability of riding, so that the Cavaliers must control the locomotive according to their own balance to avoid the locomotive dumping, therefore, those who are younger or less balanced are not suitable for riding a locomotive. In order to increase the stability of existing locomotives, related companies have been actively developing hybrid vehicles that combine vehicle stability and locomotive handling in recent years, such as the three-wheeled vehicle with two front driving wheels as disclosed in the Republic of China Bulletin No. 4_9. The "three-wheel rolling vehicle with two front wheel steerings" disclosed in the invented patent application No. 93115455 utilizes the design of two front wheels and one rear wheel, so that the knight can have both the handling of the locomotive and the car when riding. Stability. In order to enable the two front wheels to swing or rotate relative to the ground at the same time, the vehicles use a four-bar linkage to simultaneously control the two front wheels to swing or rotate relative to the ground. However, as is well known, four of the four-bar linkages are known. The joints are pivotally connected to each other. Therefore, at a low speed or when the vehicle is parked, the four-bar linkage mechanism causes a swing and causes the vehicle to fall over. Therefore, the related art has developed an anti-sway as disclosed in the patent application No. 94102972 of the Republic of China. Loading the 'locking disc and locking caliper provided with mutual cooperation, and a motor for pulling the locking caliper with 1378056 to lock the four-bar linkage mechanism in time to prevent the vehicle from falling due to the swing of the four-bar linkage mechanism, however, Since the locking disc and the locking caliper of the anti-swaying fruit are arranged correspondingly to each other, it is cumbersome to install, and the locking caliper is driven by a motor, and the components have various influences on the space configuration of the vehicle. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a dump prevention device having two front wheel vehicles. Accordingly, the present invention has a dumping prevention device for two front wheel vehicles, the vehicle having two front wheels including a frame having a hollow positioning member, two (four) wheel units corresponding to the Z-position members, and the front (four) front wheel unit turning early. The anti-tip device includes a tilting unit and a locking unit for locking the tilting unit. The tilting unit is (4) on the mosquito bit member, wherein the front wheel unit 2 is located on opposite sides of the positioning member and is pivotally disposed on the tilting unit core _' and the two pivoting members respectively corresponding to the suspension mechanism The second steering unit has a pivoting mechanism for pivoting through the positioning member, and a steering mechanism that interlocks the operating lever with the two suspension mechanisms, the two-two, moving between The hydraulic locking mechanism is locked in the unlocked position: the locking unit can be locked to prevent the tilting unit from tilting relative to the positioning member. The effect of the present invention is to utilize the position in the unlocked position and the locked position. The hydraulic locking broadcast between the w-collar mechanism controls whether the tilting unit can be relative to the setting. The tilting is earlier than the tilting of the tilting unit to avoid tilting the tilting unit relative to the clamping member. Two rigid wheel vehicles are dumped, the overall structure: early π but this effectively simplifies the installation process, can also reduce the waste of space. 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 the drawings. Τ π 1 Before the present invention is described in detail, it is to be noted that in the following description, similar elements are denoted by the same reference numerals. BRIEF DESCRIPTION OF THE DRAWINGS A preferred embodiment of a tamper-proof device having two front-wheel vehicles is mounted on a vehicle 2 having two front wheels. The two front wheel vehicles 2 include a frame 21 having a hollow; t position member 211, a front wheel unit 23 disposed corresponding to the positioning member 211, and a steering unit 24 for controlling the front wheel unit 23. The anti-tip device includes a tilting unit 22 pivotally mounted on the positioning member 211, and a locking unit 25 for locking the tilting unit 22. «Hai 7 [member oblique unit 22 has two inclined connecting rods 221 respectively spaced apart from the positioning member 211, two inclined side tubes 222 respectively pivoted at opposite ends of the inclined connecting rod 221, and one The pivoting rod 223 is pivotally connected to the two slanting side tubes 222, and the two inclined ends 221 are respectively pivoted to the two ends. The 1374056 position member 211 and the corresponding inclined side portion 222 of the inclined side tube 222 are formed, and the two ends of the linkage rod 223 are formed with sliding grooves 225 for slidably pivoting the corresponding inclined side tubes 222. The front wheel unit 23 has two suspension mechanisms 231 respectively disposed on opposite sides of the positioning member 2n and pivoted on the tilting unit 22, and two front wheels 232 respectively pivotally mounted on the corresponding suspension mechanisms 231. Each of the suspension mechanisms 231 has a rigid fork 233 pivotally disposed in the corresponding inclined side tube 222, and a joint disposed on the front pole 234 233.
、一個樞設於相對應之前輪232上的搖臂235、一根兩端分 別連接該搖臂235與該結合座234的避震器236，一根連接 於該結合座234上另一端樞設於該搖臂235上的支撐桿 237(因視角關係圖i中僅顯示其中之一），其中，該結合座 234是設置於該前叉桿233上並朝該定位件2ιι方向延伸， 而每一前輪232是位於相對應之前叉桿233下方。 由於所述結合座234是設置於該前又桿233上並朝該 定位件211方向延伸，而每一前輪232是位於相對應之前又a rocker arm 235 pivotally disposed on the corresponding front wheel 232, a shock absorber 236 connected to the rocker arm 235 and the joint seat 234 at one end, and one end connected to the other end of the joint seat 234 a support rod 237 on the rocker arm 235 (only one of which is shown in view i), wherein the joint 234 is disposed on the front fork rod 233 and extends toward the positioning member 2 ι, and each A front wheel 232 is located below the corresponding front fork 233. Since the coupling seat 234 is disposed on the front lever 233 and extends toward the positioning member 211, and each front wheel 232 is located before the corresponding one.
桿233下方，因此能有效縮減該具有兩前輪車輛2整體寬 度。 該轉向單元24具有一根枢轉地穿置至於該定位件2ιι 中的操縱桿241，及-個連動該操縱桿241與該二懸吊機構 231的轉向機構242’該轉向機構242具有一連設操縱桿 241上且面向所述車輪的轉向座243’及兩根樞設於該轉向 座243上的轉向連桿244，其中，每一根轉向連桿244具有 一桿體245，及兩個分別樞轉地連接該桿體245之兩端以框 [S 3 6 1378056 • 接該轉向座243及相對應之懸吊機構231的球接頭246。每 一轉向連彳干244的該一球接頭246是分別柜轉地連接該桿 體245之兩端以樞接相對應之的轉向座243與結合座234。 因此，當操縱桿241依據箭頭31方向轉動時，帶動該 轉向座243連動每一轉向連桿244驅動所述結合座234，進 而使所述前又桿233與前輪232依據箭頭32方向轉動。 參閱圖3、4,並一併回顧圖2,該鎖定單元25具有一 個安裝於該傾斜單;Ft 22上且能在-非鎖定位置與一鎖定位 • S間移動的液㈣定機構251 ’卩-個肖以切換該液壓鎖定 機構25 1的切換開關2·52。 5亥液壓鎖定機構251包括一個設置於該傾斜單元22上 &且突伸有-作動桿253,的油心253、一條連通接該油壓 缸253的循壤油路254、_連接該循環油路254域存有液 壓/由250的儲油器255 ’及-啟閉該循環油路254的控制間 班6 „亥切換開關252是用以切換該控制閥以控制該循 路254的啟閉’進而控制該油壓缸253中之液壓油250 • 的流動。 β田違液壓鎖定機構251位於非鎖定置時，該控制間256 ^圖3所示⑽_環油路⑸’此時，使用者若依據圖 ^斤τ方向扳動該操縱桿24卜會將該作動桿253’由圖 圖3丁位置推動至圖5所示位置，進而使得液壓油25〇能如 斜嚴3 _中箭頭所示方向於該循環油路254中流動，造成該傾 位件9可隨幻呆縱^ 241的擺動而如圖5所示相對該定 傾斜’同時帶動所述前輪單元23相對定位件211 7 1378056 即而當該液壓鎖定機構251位於鎖定位置時，駿制 間256是如圖4所示關閉該循環油路254,擋止該油壓缸 ⑸中之㈣油25〇_動’利用流體不可壓縮的特性使該 油壓紅253不可再伸縮，進而鎖定 _ 頌又这傾斜早兀22防止該傾 斜單元22相對該定位件211傾斜，使該傾斜單元22位於圖 2所示位置。 在此要特別說明的是’由於該油塵虹25”堇一側突伸 有該作動桿253，，因此，造成圖3、4中之油壓缸W兩側 所能容置的液壓油250容積不同，需利用該儲油器255調 整液壓油250的流量，維持該油壓红253中液壓油25〇進 出量的平衡，以保持該油壓缸253的作用力及作動正確性 ，當然，該液壓鎖定機構251的油邀紅⑸也可是如圖6 所示’兩側皆突伸有作動桿253，，使該油壓紅253兩側所 能容置的液壓油250容積相同，如此，即可無須安裝該儲 油器255調配液壓油250。 於本較佳實施财，該油· 253是設置於圖2中下 方的傾斜連桿22丨1，而該作動桿⑸，的—端是樞設於該 定位件2U上，但是，在實際應用上，該油塵缸253也可以 設置於該定位# 2U上，該作動桿⑸，的一端則是框設於 該傾斜單元22的傾斜側管222或連動桿如上或是如圖 7所示之配置態樣’只要其兩端是分別是拖設於會相對產生 位移的兩點上，即可達成較該傾斜單元U的效果，並不 應為本實施例的揭露所限。 藉由上述設計，當該具有兩前輪車輛2停止時，騎士 8 1378056 可以利用該切換開關252(例如一電動開關）控制該控制閥 2 5 6關閉該循環油路2 5 4 ’擋止該油壓紅2 5 3中之液壓油 250的流動’利用流體不可壓縮的特性鎖定該傾斜單元 防止該傾斜單元22相對該定位件211傾斜，有效避免車輛 發生傾倒；而該當具有兩前輪車輛2行進時，則可切換開 關252控制該控制閥256開啟該循環油路254，使得液壓油 250能於該循環油路254中流動，使該具有兩前輪車輛2具Below the rod 233, the overall width of the vehicle 2 having the two front wheels can be effectively reduced. The steering unit 24 has a lever 241 pivotally inserted into the positioning member 2, and a steering mechanism 242 that interlocks the lever 241 with the two suspension mechanisms 231. The steering mechanism 242 has a connection a steering base 243' on the lever 241 facing the wheel and two steering links 244 pivotally mounted on the steering base 243, wherein each steering link 244 has a rod 245 and two separate The two ends of the rod body 245 are pivotally connected to the frame [S 3 6 1378056 • the ball joint 246 of the steering base 243 and the corresponding suspension mechanism 231 is connected. The one ball joint 246 of each of the steering flanging 244 is connected to the two ends of the rod body 245 to pivotally connect the corresponding steering seat 243 and the joint seat 234. Therefore, when the joystick 241 is rotated in the direction of the arrow 31, the steering base 243 is caused to drive each of the steering links 244 to drive the coupling seat 234, thereby causing the front and rear wheels 233 and 232 to rotate in the direction of the arrow 32. Referring to Figures 3 and 4, and referring back to Figure 2, the locking unit 25 has a liquid (four) fixed mechanism 251 ' mounted on the tilting single; Ft 22 and movable between a non-locking position and a locking position S The switch 2·52 of the hydraulic lock mechanism 25 1 is switched. The 5H hydraulic locking mechanism 251 includes an oil core 253 disposed on the tilting unit 22 and protruding with the actuating lever 253, and a circulating oil passage 254 connected to the hydraulic cylinder 253. The oil circuit 254 is provided with a hydraulic/oil reservoir 255' and a control room for opening and closing the circulating oil circuit 254. The switch 252 is used to switch the control valve to control the circuit 254. Closed' and then controls the flow of the hydraulic oil 250 in the hydraulic cylinder 253. When the β field violation hydraulic lock mechanism 251 is in the non-locking position, the control room 256 ^ is shown in Fig. 3 (10)_ring oil passage (5)' at this time, If the user pulls the joystick 24 according to the direction of the figure, the actuator rod 253' will be pushed from the position of the figure 3 to the position shown in FIG. 5, so that the hydraulic oil 25 can be as oblique as 3 _ The direction indicated by the arrow flows in the circulating oil passage 254, so that the tilting member 9 can be tilted relative to the tilting direction as shown in FIG. 5 with the swinging of the phantom 241, while driving the front wheel unit 23 relative to the positioning member 211. 7 1378056 that is, when the hydraulic locking mechanism 251 is in the locked position, the 256 is closed as shown in FIG. The oil passage 254 blocks the oil in the hydraulic cylinder (5). The oil is incompressible by the incompressibility of the fluid, so that the oil pressure red 253 is no longer retractable, and thus the lock _ 颂 and the tilt is earlier than 22 to prevent the tilt The unit 22 is inclined with respect to the positioning member 211, so that the tilting unit 22 is located at the position shown in Fig. 2. Specifically, the operating rod 253 is protruded from the side of the oil dust rainbow 25, and therefore, The volume of the hydraulic oil 250 that can be accommodated on both sides of the hydraulic cylinder W in FIGS. 3 and 4 is different, and the oil reservoir 255 is used to adjust the flow rate of the hydraulic oil 250 to maintain the hydraulic pressure 25 in and out of the hydraulic pressure 253. The balance of the amount is to maintain the force and the correctness of the hydraulic cylinder 253. Of course, the oil invitation red (5) of the hydraulic lock mechanism 251 may also be an action rod 253 protruding from both sides as shown in FIG. The hydraulic oil 250 that can be accommodated on both sides of the oil pressure red 253 has the same volume, so that the oil reservoir 250 can be dispensed without installing the oil reservoir 255. In the preferred embodiment, the oil 253 is a tilt link 22丨1 disposed at the lower side in FIG. 2, and the end of the actuating rod (5) is pivotally disposed on the positioning member 2U, but in practical applications. The oil dust cylinder 253 can also be disposed on the positioning #2U, and one end of the operating rod (5) is disposed on the inclined side tube 222 of the tilting unit 22 or the linkage rod as above or as shown in FIG. The configuration aspect 'as long as the two ends are respectively dragged on two points which are relatively displaced, the effect of the tilting unit U can be achieved, and should not be limited by the disclosure of the embodiment. With the above design, when the two front wheel vehicles 2 are stopped, the knight 8 1378056 can control the control valve by using the switch 252 (for example, an electric switch) to close the circulating oil circuit 2 5 4 ' to stop the oil. The flow of the hydraulic oil 250 in the red pressure 2 5 3 is locked by the incompressible property of the fluid to prevent the tilting unit 22 from tilting relative to the positioning member 211, effectively preventing the vehicle from tipping; and when the two front wheel vehicles 2 are traveling The switch 252 controls the control valve 256 to open the circulating oil passage 254, so that the hydraulic oil 250 can flow in the circulating oil passage 254, so that the vehicle having the two front wheels has 2
有較好的過彎操控性能，整體結構簡單，不但能有效簡化 安裝程序，也能減少空間的浪費。 當然，於實際使用_，也可採用機械式的切換開關 252(例如一拉桿）來取代上述之電動開關進而以手動方式 控制該控制閥256的啟閉，同樣可以達成相同的功效It has better cornering control performance and simple overall structure, which not only simplifies the installation process, but also reduces the waste of space. Of course, in actual use, a mechanical switch 252 (for example, a pull rod) can be used instead of the above-mentioned electric switch to manually control the opening and closing of the control valve 256, and the same effect can be achieved.
參閱圖8,纟發明具有兩前輪車輛之防止傾倒裝置之第 二較佳實施例大致是於該第一較佳實施利相同不相同的 地方在於：該傾斜單元22的所述傾斜連桿221是一體型的 設計’而該液壓鎖定機構251是安裝於該傾斜單元Μ上， 因此可料略不需要安裝如圖2所示的連動桿223,整體構 造較為簡單更有利於生產製造。 综上所述，本發明具有兩前輪車輛之防止傾倒褒置是 二：在：非鎖定位置與該鎖定位置間移動的液壓鎖定機 構251，控制該傾斜單元22能否相對該定位件2Π傾斜， ，而=時的鎖定該傾斜單元22避免因傾斜單元^相對該 疋位件211傾斜而造成該具有 達成本發明之目的。有兩-輪車輛2傾倒。故確實能 1378056 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_請: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是一側視圖，說明本發明能明具有兩前輪車輛之 防止傾倒裝置的第一較佳實施例； 圖2是另一側視圖’輔助說明圖1 ; 圖3是一示意圖，說明該鎖定單元位於一非鎖定位置 圖4是一示意圖，說明該鎖定單元位於一鎖定位置； 圖5是一側視圖，說明該兩前輪車輛之傾斜單元傾斜 時的態樣； 圖6是一不意圖，說明該液壓鎖定機構的另一種態樣 f 圖7是一局部侧視圖，說明該第一較佳實施例之鎖定 單元的另一種態樣；及 圖8是一局部侧視圖，說明本發明能明具有兩前輪車 輔之防止傾倒裝置之第二較佳實施例。 1378056 -第-98十4Θ6Ό5-號W申二錄齡 【主要元件符號說明】 2…… •…具有兩剷輪車輛 241 ••… ••操縱桿 21···.· …·車架 242 ·.··· ••轉向機構 211 ··· •…定位件 243 ···.· ••轉向座 22·..·· •…傾斜單元 244 ·..·· ••轉向連杯 221… •…傾斜連桿 245··.·· ••桿體 222… •…傾斜側管 246 ·...· ••球接頭 223… •…連動桿 25........ ••鎖定單元 224… •…對接桿部 250…… ••液壓油 225… 251…… ••液壓鎖定機構 23…… •…前輪單元 252…… •切換開關 231 ···. ----懸吊機構 253 ···.·· .油壓缸 232 ··· …·箾輪 253, •作動桿 233 ··· …前叉桿 254…… •循環油路 234 ·.·· …結合座 255…… •儲油器 235 ·.·. …搖臂 256…… •控制閥 236 ··.· …避震器 31、32 · •箭頭 237 ··.· …支撐桿 24…… …轉向單元 11Referring to FIG. 8, a second preferred embodiment of the invention has a two-wheeled vehicle anti-tip device. The second preferred embodiment is substantially the same as the first preferred embodiment. The tilting link 221 of the tilting unit 22 is The integral design 'and the hydraulic locking mechanism 251 is mounted on the tilting unit ,, so that it is not necessary to install the linkage rod 223 as shown in FIG. 2, and the overall structure is simpler and more advantageous for manufacturing. In summary, the present invention has two anti-dumping devices for the front wheel vehicle: a hydraulic locking mechanism 251 that moves between the unlocking position and the locking position, and controls whether the tilting unit 22 can tilt relative to the positioning member 2 The locking of the tilting unit 22 while avoiding the inclination of the tilting unit ^ with respect to the tilting member 211 causes the object of the present invention to be achieved. There are two-wheeled vehicles 2 dumped. Therefore, it is true that the above description is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simpleness of the invention and the content of the invention are simple. Equivalent variations and modifications are still within the scope of the invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view showing a first preferred embodiment of a dumping prevention device having two front wheel vehicles; FIG. 2 is another side view 'auxiliary description FIG. 1; FIG. 1 is a schematic view showing the locking unit in an unlocked position. FIG. 4 is a schematic view showing the locking unit in a locked position; FIG. 5 is a side view showing the state in which the tilting units of the two front wheel vehicles are inclined; FIG. Is not intended to illustrate another aspect of the hydraulic locking mechanism. FIG. 7 is a partial side elevational view showing another aspect of the locking unit of the first preferred embodiment; and FIG. 8 is a partial side view. DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention can be embodied in a second preferred embodiment having two front wheel-assisted anti-tip devices. 1378056 -第98-10-4Θ6Ό5-号 W申二录龄 [Main component symbol description] 2... •...with two shovels for vehicles 241 ••... •• Joystick 21································· .··· ••Steering mechanism 211 ··· •...Positioning part 243 ·····••Steering seat 22·..··•... Tilting unit 244 ·..··••Steering cup 221... ...inclined link 245·····••rod 222... •...inclined side pipe 246 ·...· ••ball joint 223... •... linkage bar 25........ ••locking unit 224... •...Docking lever 250... ••Hydraulic oil 225... 251... ••Hydraulic locking mechanism 23... •...Front wheel unit 252... •Toggle switch 231 ···. ---- Suspension mechanism 253 ······ . Hydraulic cylinder 232 ·····箾 wheel 253, • Actuating lever 233 ···...Front fork lever 254... •Circulating oil passage 234 ·.·· ...combination seat 255... Oil reservoir 235 ···....rocker arm 256... •Control valve 236 ·····shock absorber 31,32 ·•arrow 237 ····...support rod 24.........steering unit 11