Yambani

Kale kwambiri m'zaka za m'ma 1830 galimoto ya nthunzi itabadwa, anthu ena ankaganiza zopatsa mawilo a galimoto matabwa ndi "njira" za rabara, kuti magalimoto olemera a nthunzi azitha kuyenda pamtunda wofewa, koma magwiridwe antchito oyambirira a njanji ndi momwe amagwiritsidwira ntchito sizinali zabwino, mpaka mu 1901 pamene Lombard ku United States adapanga galimoto yokoka magalimoto yosamalira nkhalango, ndipo adangopanga njira yoyamba yokhala ndi zotsatira zabwino. Patatha zaka zitatu, mainjiniya aku California Holt adagwiritsa ntchito njira yomwe Lombard adapanga popanga ndikumanga thirakitala ya nthunzi ya "77".

Unali thirakitala yoyamba yotsatiridwa padziko lonse lapansi. Pa Novembala 24, 1904, thirakitalayi inayesedwa koyamba ndipo pambuyo pake inayikidwa mu kupanga kwakukulu. Mu 1906, kampani yopanga mathirakitala ya Holt idamanga thirakitala yoyamba padziko lonse yoyendetsedwa ndi injini yoyaka mafuta, yomwe idayamba kupanga kwakukulu chaka chotsatira, inali thirakitala yopambana kwambiri panthawiyo, ndipo idakhala chitsanzo cha thanki yoyamba padziko lonse yopangidwa ndi Britain zaka zingapo pambuyo pake. Mu 1915, aku Britain adapanga thanki ya "Little Wanderer" idatsata njira za thirakitala yaku America ya "Brock". Mu 1916, matanki a "Schnad" ndi "Saint-Chamonix" opangidwa ku France adatsata njira za mathirakitala aku America a "Holt". Ma crawlers alowa m'mbiri ya matanki kwa pafupifupi masika ndi autumn pafupifupi 90 mpaka pano, ndipo matanki amakono, mosasamala kanthu za kapangidwe kawo kapena zipangizo, kukonza, ndi zina zotero, nthawi zonse akuwonjezera chuma cha thanki, ndipo matankiwo apanga matanki omwe amatha kupirira mayeso a nkhondo.

Chikhazikitso

Ma track ndi ma chainring osinthasintha oyendetsedwa ndi ma active wheels omwe amazungulira ma active wheels, ma load wheels, ma induction wheels ndi ma carrier pulleys. Ma tracks amapangidwa ndi track shoes ndi track pins. Track pins amalumikiza tracks kuti apange track link. Malekezero awiri a track shoe ali ndi mabowo, ogwirizana ndi active wheel, ndipo pali mano oyambitsa pakati, omwe amagwiritsidwa ntchito kuwongola track ndikuletsa track kuti isagwe pamene thanki ikuzunguliridwa kapena kugubuduzidwa, ndipo pali nthiti yolimba yoletsa kutsetsereka (yotchedwa pattern) kumbali ya nthaka kuti iwonjezere kulimba kwa track shoe ndi kumatira kwa track pansi.