Motocin Jirgin Kasa na Kasa

Motocin low bed, wanda aka fi sani da lowboy ko drop-deck trailers, suna da tsarukan jigilar nauyi masu nauyi da aka tsara don motsa kayan aikin zurfin tushe masu girma, nauyi, da girma. A matsayin kayan haɗi masu mahimmanci a cikin ayyukan injiniyan tushe, motocin low bed suna zama mahimmin haɗin gwiwa tsakanin wuraren kera kayan aiki, wuraren aikin, da wuraren ajiye kayan aiki. Babban aikin su shine jigilar injinan hakowa, masu tura gindin girgiza, hammer na hydraulic, tsarin casing, kanun hakowa da aka ɗora a kan crane, da sauran kayan aikin tushe na musamman da suka wuce girman jigilar hanyoyin al'ada da iyakokin nauyi. Tsawon ƙasan ƙasa—yawanci tsakanin 1.2 da 1.5 mita daga matakin ƙasa—yana ba da damar karɓar kayan aiki masu tsawo yayin da suke kiyaye rarraba nauyin axle na doka da bin ƙa'idodin tsakiya a kan hanyoyin jama'a. Motocin low bed suna amfani a dukkan aikace-aikacen injiniyan zurfin tushe, gami da ayyukan shigar da bango na diaphragm, ginin pile secant, gindin gindin sheet, ayyukan jet grouting, da ginin bango na ƙasa-cement-bentonite (SCB). Dacewar su yana da matukar mahimmanci don jigilar manyan kelly stems, kanun juyawa, da tarin sama da ke da alaƙa da gindin piling mai girma. Motocin suna karɓar duka tsarin kayan aiki masu motsi da na juyawa, tare da wuraren kingpin masu daidaitawa da tsarin rarraba nauyi da ke karɓar nauyi masu juyawa ko marasa daidaito na kayan aikin tushe. A cikin aiki, motocin low bed suna aiki a matsayin dandamali masu ɗaukar nauyi suna amfani da tsarin axles masu yawa—yawanci suna tsakanin axles biyu zuwa biyar—tare da tsarin dakatarwa na hydraulic da aka tsara don rage ƙarfin motsi yayin jigilar a kan ƙasa mai bambanci. Tsarin dakatarwa na iska ko tsarin dakatarwa na inji suna rarraba nauyin kayan a cikin axles don kiyaye daidaito yayin hanzari, birki, da canje-canje na hanya. Tsawon dakunan da za a iya daidaita a kan wasu samfuran suna karɓar kayan tare da tsawon ƙasa mai bambanci, yayin da axles masu ƙarfin wuta ko tag-axles a kan manyan tsarukan suna ƙara ƙarfin ɗaukar nauyi gaba ɗaya zuwa 40–60 tonnes da sama. Tsarin motocin yana haɗawa da ƙarfafa I-beam ko firam na akwati wanda zai iya ɗaukar nauyin da aka mai da hankali daga wuraren tuntuɓar jiki na injinan hakowa da firam na hammer. Tsarin motocin low bed na yau da kullum sun haɗa da samfuran dakunan da aka ƙayyade don kayan da ke da tsari mai ɗorewa, ƙirar gooseneck da ke ba da ingantaccen juyawa a cikin birane masu cunkoso ko yanayin samun damar da aka iyakance, da samfuran da za a iya daidaita tsawon dakin da ke ba da damar ayyukan lodawa da sauke ba tare da cranes na waje ba. Nau'in na musamman sun haɗa da tsarin hydraulic da za a iya sarrafa su ta hanyar mara waya, tsarin haɗin gwiwa don tabbatar da injinan hakowa tare da outriggers, da tsarin axles biyu ko axles biyu don inganta rarraba nauyi a kan ƙasa mai laushi kusa da wuraren aikin. Ka'idodin zaɓi don motocin low bed sun haɗa da mafi girman nauyin motar da aka ƙayyade (dole ne ya wuce nauyin kayan aikin bushe da ƙarin 15–20% na kariya), tsawon dakin da faɗin da suka dace da ƙananan kayan, tsarin axles da suka dace da ƙa'idodin doka na yankin, nau'in tsarin dakatarwa da ya dace da yanayin ƙasa, da iyakokin juyawa a cikin hanyoyin samun damar aikin. Tsarin motocin, gami da angles na shigarwa da fita, matsayin kingpin, da ƙarfin juyawa, dole ne su dace da wuraren aikin zurfin tushe da ke da iyakance juyawa da hanyoyin shigarwa masu iyaka. Ka'idodin da suka dace da ƙira, ƙera, da aiki na motocin low bed sun haɗa da ISO 3691-4 (motoci na masana'antu—tsaro) don daidaiton ɗaukar nauyi, EN 12642 (Tsaron kayan jigilar kaya) don ingancin tsari, DIN 70020 (Girman motoci da nauyin axle) don bin ƙa'idodin hanyoyin Jamus, da ƙa'idodin API 2A don aikace-aikacen teku. Bin ƙa'idodin hukumomin jigilar kayan ƙasa na yankin game da nauyin axle, tsawon motar gaba ɗaya, da iyakokin faɗi yana da wajibi don motsin kayan a cikin ayyukan Turai.