Ijekhi yemoto yindlela ekhethekileyo ekuvumela ukuba wenze ulungiso lwesiqhelo lwelori okanye imoto kwiimeko apho ulungiso kufuneka lwenziwe ngaphandle kokuxhasa imoto ngamavili, kunye nokutshintsha amavili ngokuthe ngqo kwindawo yokuphuka okanye ukumisa. .Ukulungeleka kwejack yanamhlanje kukuhamba kwayo, ubunzima obuphantsi, ukuthembeka kunye nokulula kokugcinwa.
Amaxesha amaninzi, iijack zisetyenziswa ngabaqhubi beemoto kunye neelori, amashishini ezithuthi (ingakumbi amaqela ahambayo), iinkonzo zemoto kunye nokufakwa kwamatayara.
Iimpawu eziphambili
Umthamo womthwalo (ochazwe ngeekhilogram okanye iitoni) bubunzima obukhulu bomthwalo onokuthi i-jack iphakamise.Ukufumanisa ukuba i-jack ikulungele ukuphakamisa le moto, kuyimfuneko ukuba umthamo wayo wokuthwala awukho ngaphantsi kwe-jack eqhelekileyo okanye ubuncinane i-1/2 yobunzima bemoto.
Iqonga lenkxaso liyinxalenye yenkxaso esezantsi yejack.Idla ngokuba nkulu kunenxalenye engaphezulu yokuthwala ukubonelela ngoxinzelelo oluncinci oluthe ngqo kumphezulu wokuthwala ngokusemandleni, kwaye ibonelelwa nge "spike" protrusions ukuthintela ijekhi ekutyibilikeni kwiqonga lenkxaso.
I-Pickup yinxalenye yejekhi eyenzelwe ukuphumla emotweni okanye umthwalo onyusiweyo.Kwi-screw okanye i-rack jacks kwiimodeli ezindala zeemoto zasekhaya, yintonga yokugoqa, kwabanye, njengomthetho, i-bracket egxininisekileyo (isithende sokuphakamisa).
Ubuncinci (obokuqala) ubude bokuchola (Numz)- umgama omncinci othe nkqo ukusuka kwiqonga lenkxaso (indlela) ukuya kwi-pickup kwindawo yayo ephantsi yokusebenza.Ukuphakama kokuqala kufuneka kube kuncinci ukwenzela ukuba i-jack ingene phakathi kweqonga lenkxaso kunye nokumiswa okanye izinto zomzimba.
Obona bude buphakamileyo bokuphakamisa (N.ubuninzi)- owona mgama othe nkqo ukusuka kwiqonga lenkxaso ukuya ekuthatheni xa uphakamisa umthwalo ukuya kubude obupheleleyo.Ixabiso elinganeleyo le-Hmax aliyi kuvumela ukuba i-jack isetyenziswe ukuphakamisa izithuthi okanye iinqwelwana apho i-jack ikwindawo ephakamileyo.Kwimeko yokungabikho kobude, i-spacer cushions ingasetyenziswa.
Ubukhulu be-jack stroke (L.ubuninzi)-eyona ntshukumo ithe nkqo yepikiphu ukusuka ezantsi ukuya kwindawo ephezulu.Ukuba i-stroke esebenzayo ayinelanga, i-jack ayinako "ukukrazula" ivili endleleni.
Kukho iintlobo ezininzi zeejack, ezihlelwe ngokohlobo lolwakhiwo:
1.Iijekhi zeScrew
2.I-Rack kunye ne-pinion jacks
3.Iijekhi zeHydraulic
4.Iijekhi zomoya
1. Iijekhi zokujija
Kukho iintlobo ezimbini zeejack zemoto - telescopic kunye nerhombic.I-Screw Jacks zithandwa ngabaqhubi beemoto.Ngelo xesha, iijacks ze-rhombic, umthamo wokuthwala ohluka kwiitoni ezi-0.5 ukuya kwiitoni ezi-3, zithandwa kakhulu ngabanini beemoto kwaye zihlala zibandakanyiwe kwiseti yeendlela eziqhelekileyo zendlela.Iijekhi zeTelescopic ezinomthamo wokuya kuthi ga kwiitoni ezili-15 ziyimfuneko kwiimoto zeSUV kunye neLCV zeentlobo ngeentlobo.
Inxalenye ephambili ye-screw jack yi-screw ene-hinged load loading cup, eqhutywa sisibambo.Indima yezinto ezithwala imithwalo yenziwa ngumzimba wentsimbi kunye ne-screw.Ngokuxhomekeke kwicala lokujikeleza kwesiphatho, i-screw iphakamisa okanye yehlisa iqonga lokuthatha.Ukubamba umthwalo kwindawo oyifunayo kwenzeka ngenxa ye-braking of screw, eqinisekisa ukhuseleko lomsebenzi.Ukunyakaza okuthe tye komthwalo, i-jack kwi-sled exhotywe nge-screw isetyenziswa.Umthamo womthwalo we-screw jacks unokufikelela kwiitoni ezili-15.
Iinzuzo eziphambili ze-screw jacks:
● i-stroke ephawulekayo yokusebenza kunye nokuphakama kokuphakamisa;
● ubunzima obulula;
● Ixabiso eliphantsi.
Screw jacks
I-screw jack ithembekile ekusebenzeni.Oku kubangelwa ukuba umthwalo ulungiswe ngumtya we-trapezoidal, kwaye xa uphakamisa umthwalo, i-nut ijikeleza ingasebenzi.Ukongezelela, iingenelo zezi zixhobo ziquka amandla kunye nokuzinza, kunye nenyaniso yokuba banokusebenza ngaphandle kokumisa okongeziweyo.
2. I-Rack kunye ne-pinion jacks
Inxalenye ephambili ye-rack jack yintsimbi yentsimbi ephethe umthwalo kunye nekomityi yenkxaso yomthwalo.Isici esibalulekileyo se-rack jack yindawo ephantsi yeqonga lokuphakamisa.Isiphelo esisezantsi sikaloliwe (i-paw) sine-angle efanelekileyo yokuphakamisa imithwalo kunye nenkxaso ephantsi.Umthwalo ophakanyiswe kumzila kaloliwe ubanjwa zizixhobo zokutshixa.
2.1.I-Lever
I-rack yandiswa nge-lever ye-swinging drive.
2.2.Ngamazinyo
Kwiijekhi zegiya, i-drive lever ithathelwa indawo yigiya, ejikeleza ngebhokisi yegiya isebenzisa isiphatho sokuqhuba.Ukuze umthwalo uqiniswe ngokukhuselekileyo kwindawo ethile yokuphakama kunye nendawo oyifunayo, enye yeegiya ixhotywe ngendlela yokuvala - i-ratchet ene "pawl".
I-Rack kunye ne-pinion jacks
Iijekhi ze-Rack ezinomthamo ophetheyo ukuya kwiitoni ezi-6 zinenqanaba elilodwa le-gearbox, ukusuka kwi-6 ukuya kwiitoni ezili-15 - izigaba ezimbini, ngaphezu kweetoni ezili-15 - izigaba ezintathu.
Iijacks ezinjalo zingasetyenziselwa zombini ngokuthe nkqo kwaye ngokuthe tye, zilula ukuzisebenzisa, zilungiswe kakuhle kwaye zisisixhobo sendalo yonke sokuphakamisa kunye nokulungisa imithwalo.
3. Iijekhi zeHydraulic
Iijekhi zeHydraulic, njengoko igama libonisa, zisebenza ngokucinezela ulwelo.Izinto eziphambili ezithwala umthwalo ngumzimba, ipiston ebuyiselwayo (i-plunger) kunye nolwelo olusebenzayo (ngokuqhelekileyo ioli ye-hydraulic).Indlu inokuba zombini i-cylinder yesikhokelo kwipiston kunye nedama lokusebenzisa ulwelo olusebenzayo.Ukuqiniswa kwi-handle handle kuhanjiswa nge-lever ukuya kwipompo yokukhupha.Xa uhambela phezulu, i-liquid evela kwi-reservoir ifakwe kwi-cavity yempompo, kwaye xa icinezelwe, iphonswe kwi-cavity ye-cylinder esebenzayo, yandisa i-plunger.Ukubuyela umva kolwelo kuthintelwa ziivalvu zokufunxa kunye nokukhupha.
Ukunciphisa umthwalo, inaliti yokuvala i-valve ye-bypass ivuliwe, kwaye i-fluid esebenzayo iphoqeleka ukuba iphume kwi-cavity ye-cylinder esebenzayo ibuyele kwi-tank.
Iijekhi zeHydraulic
Uncedo lweejekhi zehydraulic ziquka:
● umthamo omkhulu womthwalo - ukusuka kwi-2 ukuya kwiitoni ezingama-200;
● ukuqina kwesakhiwo;
● uzinzo;
● ukuguda;
● ukubumbana;
● amandla amancinci kwisibambo sokuqhuba;
● ukusebenza kakuhle (75-80%).
Izinto ezingeloncedo ziquka:
● ukuphakama okuncinci kokuphakamisa kumjikelo omnye wokusebenza;
● ukuntsonkotha koyilo;
● akunakwenzeka ukulungelelanisa ukuphakama kokunciphisa ngokuchanekileyo;
● Iijekhi ezinjalo zinokubangela ukophuka okuyingozi ngakumbi kunezixhobo zokuphakamisa oomatshini.Ngoko ke, kunzima kakhulu ukulungisa.
Kukho iintlobo ezininzi zeejekhi zehydraulic.
3.1.Iijacks zebhotile zeClassic
Olunye uhlobo oluguquguqukayo kunye nolufanelekileyo yintsimbi enye (okanye i-single-plunger) yebhotile.Ngokuqhelekileyo, iijacks ezinjalo ziyinxalenye yezixhobo eziqhelekileyo zendlela yeelori zeeklasi ezahlukeneyo, ukusuka kwiimoto zorhwebo ezikhanyayo ukuya kwii-train ezinkulu zeendlela, kunye nezixhobo zokwakha iindlela.Ijekhi enjalo ingasetyenziselwa njengeyunithi yamandla yokushicilela, i-benders yepayipi, abasiki bepayipi, njl.
Telescopic
iijacks
3.2.Iijacks zeTelescopic (okanye i-double-plunger).
Ihluke kwintonga enye kuphela kubukho bentonga ye-telescopic.Iijacks ezinjalo zikuvumela ukuba uphakamise umthwalo ukuya kubude obukhulu, okanye unciphise ukuphakama kwe-pickup, ngelixa ugcina ukuphakama okuphezulu.
Banomthamo wokuthwala we-2 ukuya kwi-100 yeetoni okanye ngaphezulu.Izindlu zombini ziyi-cylinder yesikhokelo kwiplunger kunye nedama lolwelo olusebenzayo.Isithende sokuphakamisa iijack kunye nomthamo wokuthwala ukuya kwiitoni ezingama-20 zifumaneka phezulu kwi-screw screwed kwi-plunger.Oku kuvumela, ukuba kuyimfuneko, ngokukhupha i-screw, ukwandisa ukuphakama kokuqala kwe-jack.
Kukho idizayini yeejekhi ze-hydraulic, apho i-motor yombane eqhagamshelwe kuthungelwano lwesithuthi kwibhodi, okanye i-pneumatic drive, isetyenziselwa ukuqhuba impompo.
Xa ukhetha i-jack yebhotile ye-hydraulic, kuyimfuneko ukuba ungayithathi ingqalelo kuphela amandla ayo okuphatha, kodwa kunye ne-pick-up and lifting heights, ekubeni i-stroke esebenzayo enomthamo owaneleyo wokuthwala ayinakwanela ukuphakamisa imoto.
Iijekhi zeHydraulic zifuna ukubeka iliso kwinqanaba lolwelo, imeko kunye nokuqina kwezitywina zeoyile.
Ngokusetyenziswa rhoqo kweejacks ezinjalo, kucetyiswa ukuba ungaqinisi indlela yokutshixa ukuya ekupheleni ngexesha lokugcinwa.Umsebenzi wabo unokwenzeka kuphela kwindawo ethe tye kwaye kuphela (njengayo nayiphi na i-jacks ye-hydraulic) yokuphakamisa, kwaye kungekhona ukubamba ixesha elide lomthwalo.
3.3.Iijacks eziqengqelekayo
I-Rolling Jacks ngumzimba ophantsi kumavili, apho i-lever enesithende esiphakamisayo iphakanyiswe yi-cylinder ye-hydraulic.Ukulungeleka komsebenzi kuququzelelwa ngamaqonga asuswayo atshintsha ukuphakama kokuthatha kunye nokuphakamisa.Akufanele ilibale ukuba indawo ethe tyaba kwaye enzima iyadingeka ukusebenza nge-rolling jack.Ngoko ke, olu hlobo lweejack, njengomthetho, lusetyenziswa kwiinkonzo zeemoto kunye neevenkile zamavili.Ezona zixhaphakileyo ziijack ezinomthamo wokuthwala iitoni ezi-2 ukuya kwezi-5.
4. Iijekhi zomoya
Iijacks eziqengqelekayo
Iijekhi zomoya
Iijacks ze-pneumatic ziyimfuneko kwimeko yesithuba esincinci phakathi kwenkxaso kunye nomthwalo, kunye neentshukumo ezincinci, ukufakwa okuchanekileyo, ukuba umsebenzi uza kwenziwa kumhlaba ovulekileyo, ongalinganiyo okanye onomgxobhozo.
I-jack ye-pneumatic yi-sheath ye-rubber-cord sheath eyenziwe ngendwangu ekhethekileyo eqiniweyo, eyandisa ukuphakama xa umoya ocinezelweyo (igesi) unikezelwa kuyo.
Umthamo wokuthwala i-jack ye-pneumatic inqunywe yingcinezelo yokusebenza kwi-pneumatic drive.Iijekhi ze-pneumatic ziza ngobukhulu obuninzi kunye nomthamo ohlukeneyo womthwalo, ngokuqhelekileyo 3 - 4 - 5 tons.
Eyona nto ingathandekiyo yeejack ze-pneumatic yindleko yazo ephezulu.Iphenjelelwa kubunzima obunxulumene noyilo, ikakhulu olunxulunyaniswa nokutywinwa kwamalungu, itekhnoloji ebiza kakhulu yokwenziwa kwamaqokobhe atywiniweyo kwaye, ekugqibeleni, iibhetshi ezincinci zemveliso.
Iimpawu eziphambili xa ukhetha i-jack:
I-1.Umthamo wokuthwala ubuninzi obunokwenzeka bomthwalo oza kuphakanyiswa.
I-2.Ubude bokuqala bokuthatha umgama omncinci kunokwenzeka phakathi kwendawo yokuthwala kunye nendawo yokuxhasa umatshini kwindawo yokusebenza ephantsi.
3.Ukuphakama kokuphakama ngumgama ophezulu ukusuka kwindawo exhasayo ukuya kwindawo ephezulu yokusebenza, kufuneka ikuvumele ukuba ususe ngokulula nayiphi na ivili.
4.I-pick-up yinxalenye yendlela eyenzelwe ukuphumla kwinto ephakanyiswayo.Iijacks ezininzi ze-rack kunye ne-pinion zine-pick-up eyenziwe ngendlela yentonga yokugoqa (le ndlela yokudibanisa ayifanelekanga kuzo zonke iimoto, ezikhawulela umda wayo), ngelixa ukuthathwa kwe-hydraulic, i-rhombic kunye nezinye iimodeli zenziwe. ngendlela ye-bracket eqinile esisigxina (isithende esiphakamisayo).
5.Isixhobo sokusebenza - ukuhambisa ilokhi ngokuthe nkqo ukusuka ezantsi ukuya kwindawo ephezulu.
6.Ubunzima bejekhi.
Imithetho yokhuseleko xa usebenza ngeejack
Xa usebenza ngeejacks, kuyimfuneko ukulandela imigaqo esisiseko yokhuseleko xa usebenza ngeejacks.
Xa utshintsha ivili kwaye ngexesha lomsebenzi wokulungisa ngokuphakamisa nokuxhoma imoto, kuyafuneka:
● lungisa amavili kwicala elichasene nejekhi macala omabini ukunqanda ukuba imoto ibuye umva ize iwe kwijekhi okanye isitendi.Ukwenza oku, ungasebenzisa izicathulo ezikhethekileyo;
● Emva kokuphakamisa umzimba ukuya kubude obufunekayo, kungakhathaliseki ukuba uyilo lwejack, faka isigxina esithembekileyo phantsi kwezinto ezithwala umthwalo womzimba (i-sills, i-spars, isakhelo, njl.).Akuvumelekanga ngokungqongqo ukusebenza phantsi kwemoto ukuba ikwi-jack kuphela!
Ixesha lokuposa: Jul-12-2023