2023年全國碩士研究生考試考研英語一試題真題(含答案詳解+作文范文)_第1頁
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1、<p><b>  附 錄</b></p><p>  motor vehicles and the use of additional devices</p><p>  Self-loading vehicle arm (also known as hydraulic multi-energy vehicles and fighting for se

2、lf-loading and unloading trucks) is characterized by separate cargo body fight with the implementation of a goods vehicle and a number of joint fighting operations, the cycle of transport, which can Self-loading dump con

3、tainers, precast, machine equipment, bulk materials. The use of the car changed a number of operating the previous system under which the motor transport vehicle must be equipped with crane</p><p>  At prese

4、nt, the arm-type self-loading vehicle mainly used for mining of mineral aggregate loading, transport and dump, factory parts and rough handling and waste dumping, and construction waste from the handling, more clearance

5、for the urban sanitation sector transportation of refuse. Arm as a result of self-loading cargo vehicles and body is separate from the fighting, using fixed-point garbage collection from time to time. Thus, in particular

6、 focal point for residents, as well as the market ch</p><p>  Arm-type truck with a low investment and low operating costs, maintenance and convenient, less noise, no secondary dust pollution, etc. Yang. The

7、 drawback is the size of the litter bucket, and can not be placed in the narrow streets, while in transit light foam filled refuse to take full advantage of easy self-loading vehicle arm, some cities have begun to establ

8、ish a centralized garbage removal station, the use of small land transport equipment (such as human dump 3) refuse to focus on narrow s</p><p>  1, the activities of the vehicle hydraulic cargo canopy</p&

9、gt;<p>  This is to prevent the arm of a self-contained hopper car loading and unloading of materials from blowing out of the vehicle cargo canopy.</p><p>  The structure of the device as shown in Fig

10、ure 1.</p><p>  Its working principle is: to promote the distribution of hydraulic valve joystick , hydraulic oil into the fuel tank on the cavity, the extended piston rod back, while driving the main arm to

11、 the car in front of swing in the tarp , under the canopy of the self and the main arm driven by its front-end articulated main arm , so that folding the sheeting under the lotus back then, under the support of opening u

12、p, in the cargo box form a closed top of the Ji Flip cover So that is not contained in th</p><p>  2, swing-wing self-loading automatic car cover</p><p>  The new device structure as shown in Fi

13、gure 2. When the arm-type self-loading vehicle operations, to manipulate the distribution of multi-way valve stem so that the car swings arms back, when Hopper was slowly lifting, at the same time, as the arm and fixed i

14、n the frame side on the small pulley gradually widened the distance that the rope the role of the length of stretch, this time through the wire rope to pull pulley and shaft , with the shaft link a fixed rear cover. <

15、;/p><p>  Then gradually open up. When the pendulum swing back to the largest angle (that is unloaded or loaded Doo Doo), the rear cover has also opened up to the maximum point of view, are not to affect the lo

16、ading or unloading hopper. Action in the above-mentioned process, as a result of the front cover through the connecting arm empty set of fixed beams in the arm , so the former self-covered under the arm placed in the ver

17、tical with the ground manipulation of self-handling car so that after the swing </p><p>  Automatically cover the wing structure is simple and no special operation when used with other types of enclosures co

18、vered compared to savings of time and energy, elegant shape, covered with a good hopper to prevent the material from blowing out during transport . Arm of the two self-loading and unloading of motor vehicles Therefore, t

19、he role of the former self-cover, the arm placed in the vertical with the ground before the front cover is always tight cover of the hopper. When the arm continues</p><p>  淺談自裝卸汽車及附加裝置的運用</p><p&g

20、t;  擺臂式自裝卸汽車(也叫液壓多能車和可換斗式自裝卸車)的特點是貨斗與車體分開,實行一輛車和數(shù)個貨斗聯(lián)合作業(yè),循環(huán)運輸,即能自裝自卸集裝箱、預制構(gòu)件、整機設(shè)備、散裝物料等。該車的使用使許多作業(yè)改變了以往那種汽車運輸必須配備汽車吊車或裝載機、叉車,以至需要許多裝卸工人的方式,而該車節(jié)省了裝載及卸車的等候時間,提高了汽車的周轉(zhuǎn)率和利用率,因而節(jié)省了大量的人力、物力和財力,提高了經(jīng)濟效益。</p><p>  目前

21、,擺臂式自裝卸汽車主要用于礦山礦料的裝載、運輸和自卸,工廠毛坯零件及廢料的搬運與傾卸,及建筑垃圾的自裝卸, 更多的是用于城市環(huán)衛(wèi)部門清運垃圾等。由于擺臂式自裝卸汽車的車體與貨斗是分開的,采用的是定點不定時地收集垃圾。因此,特別適用于居民集中點、集市以及垃圾量隨季節(jié)變化的地點。它與自卸垃圾車和叉車配方形垃圾箱及倒裝密封自卸垃圾車配圓形垃圾桶的收運方式相比,能有效地克服了作業(yè)時的二次揚塵和噪聲的污染。</p><p>

22、;  擺臂式自卸汽車具有投資少,經(jīng)營費用低,保養(yǎng)維修方便,噪音少,無二次楊塵污染等優(yōu)點。其缺點是專用垃圾斗體積大,在狹窄街道不能擺放,同時在運輸過程中輕泡垃圾易飛揚為充分利用擺臂式自裝卸汽車, 有些城市已開始建立集中的垃圾收運站,使用小型收運機具(如人力三輪斗車)把狹窄街道的垃圾集中于垃圾站(樓)然后裝于擺臂式自裝卸汽車的專用垃圾斗中,再通過自裝卸車外運傾卸。這就解決了狹窄街道不能擺放專用垃圾斗的問題。為解決擺臂式自裝卸汽車運輸過程中的

23、物料飛揚問題, 廣西南寧專用汽車改裝廠已設(shè)計并制造了兩種較為有效的防物料飛揚的附加裝置和司機可在駕駛室內(nèi)操縱整個作業(yè)過程的軟軸操縱裝置?,F(xiàn)介紹如下。</p><p>  1、 車輛貨箱液壓活動蓬蓋</p><p>  這是一種防止擺臂式自裝卸汽車料斗所載物料往外飛揚的車輛貨箱蓬蓋其工作原理是:推動液壓分配閥操縱桿,液壓油進入油缸上腔,其伸出活塞桿縮回,同時拉動主擺臂往車前方擺動,在篷布、篷

24、桿的自重及主擺臂推動下其前端鉸接的主擺臂,使折疊的蓬布在蓮桿的支撐下向后依序撐張開,在貨箱的上方形成一個密閉倒扣的冀蓋,使所載物運輸中不至于向外飛揚。當把操縱桿向相反方撥動,油進入油缸的上腔,其伸出的活塞桿縮回,同時拉動主擺臂往車前方擺動,在蓬布、蓬桿的自重及主擺臂的推動下,蓬布、蓬桿和主擺臂按序整齊地折疊在貨箱前周緣上,蓬蓋打開,便于貨箱裝卸料。該裝置結(jié)構(gòu)簡單,使用方便,特別適用于貨斗形狀大小不一致。料斗堆料過高等場合使用遮蓋性好,可

25、防止貨斗內(nèi)的物料在運輸時往外飛揚。</p><p>  2、 自裝卸汽車翼式自動蓋</p><p>  該新型裝置的結(jié)構(gòu)當擺臂式自裝卸汽車作業(yè)時,操縱多路分配閥的閥桿使該車兩臂向后擺動,這時料斗被徐徐吊起,與此同時,由于擺臂與固定在車架側(cè)板上的小滑輪距離逐漸拉大,即鋼絲繩的作用長度拉長,此時通過鋼絲繩拉轉(zhuǎn)滑輪及轉(zhuǎn)軸,與轉(zhuǎn)軸聯(lián)接固定的后蓋。</p><p>  隨之逐

26、漸向上打開。當擺臂向后擺至最大角度(即卸斗或裝斗)時,后蓋也向上開至最大角度,完全不影響裝料斗或卸料。在上述動作過程中,由于前蓋是通過連接臂空套在擺臂固定橫梁上的,所以,在前蓋自重作用下,在擺臂擺到與地面垂直前,前蓋總是罩緊著料斗的。當擺臂繼續(xù)往后擺動時,前蓋自重下擺,其左端碰到轉(zhuǎn)軸而不能繼續(xù)下擺,此時前蓋隨擺臂后擺而向上抬起,擺臂擺到最大角度時,前后兩蓋均向上抬起,形似起飛的兩翼。此時,即可做換斗作業(yè)而毫無影響。當操縱自裝卸車使擺臂后

27、擺,作傾卸物料作業(yè),料斗達到傾卸角度時,后蓋向上開到相當大的角度,不影響卸料作業(yè)。而前蓋由于自重始終罩緊料斗右半部,不影響卸料工作。前蓋設(shè)計為可隨自重而擺動,目的是降低在室內(nèi)作業(yè)時前蓋抬起的高度。</p><p>  該翼式自動蓋結(jié)構(gòu)簡單,使用時不需專門操作,與其他類型的罩蓋相比,節(jié)省了時間和能源,外形美觀大方,遮蓋性好,可防止料斗內(nèi)的物料在運輸過程中往外飛揚。上述兩種擺臂式自裝卸汽車的此時通過鋼絲繩拉轉(zhuǎn)滑輪及轉(zhuǎn)

28、軸與轉(zhuǎn)軸聯(lián)接固定的后蓋隨之逐漸向上打開。當擺臂向后擺至</p><p>  最大角度(即卸斗或裝斗)時,后蓋也向上開至最大角度,完全不影響裝料斗或卸料。在上述動作過程中,由于前蓋是通過連接臂空套在擺臂固定橫梁上的,所以,在前蓋自重作用下,在擺臂擺到與地面垂直前,前蓋總是罩緊著料斗的。當擺臂繼續(xù)往后擺動時,前蓋自重下擺,其左端(就圖示而言)碰到轉(zhuǎn)軸而不能繼續(xù)下擺,此時前蓋隨擺臂后擺而向上抬起,擺臂擺到最大角度時,前

29、后兩蓋均向上抬起,形似起飛的兩翼。此時,即可做換斗作業(yè)而毫無影響。目前,擺臂式自裝卸汽車主要用于礦山礦料的裝載、運輸和自卸,工廠毛坯零件及廢料的搬運與傾卸,及建筑垃圾的自裝卸,更多的是用于城市環(huán)衛(wèi)部門清運垃圾等。由于擺臂式自裝卸汽車的車體與貨斗是分開的, 采用的是定點不定時地收集垃圾。因此, 特別適用于居民集中點、集市以及垃圾量隨季節(jié)變化的地點。當操縱自裝卸車使擺臂后擺,作傾卸物料作業(yè),料斗達到傾卸角度時,后蓋向上開到相當大的角度不影響

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