Babban nauyin da ke kan bamper shine kare masu tafiya a ƙasa: saboda masu tafiya a ƙasa ƙungiyoyi ne masu rauni, bamper ɗin filastik na iya rage ƙarfin tasirin da ke kan ƙafafun masu tafiya a ƙasa, musamman maƙasudai, tare da ƙirar sandar gaba mai kyau, rage matakin rauni lokacin da aka bugi masu tafiya a ƙasa.
Na biyu, ana amfani da shi don rage asarar sassan abin hawa a lokacin karo da sauri. Idan bam ɗin ba shi da kyau, lalacewar waɗannan sassan na iya zama mai tsanani a cikin hatsari.
Me yasa bumpers ɗin filastik ne kuma aka cika su da kumfa?
A gaskiya ma, an yi amfani da bamper da ƙarfe tun da daɗewa, amma daga baya an gano cewa aikin bamper shine kare masu tafiya a ƙasa, don haka abu ne na halitta a canza zuwa filastik.
Za a rufe wasu sandunan ƙarfe masu hana karo da kumfa, wanda shine don cike gibin da ke tsakanin bututun resin da bututun ƙarfe mai hana karo, ta yadda bututun ba zai yi laushi ba daga waje, ainihin tasirin yana da ƙarancin gudu, ƙaramin ƙarfi, kuma zai iya zama ba tare da kulawa ba kai tsaye.
Da ƙasan bamper, haka nan farashin gyara ya fi girma:
A cewar rahoton IIHS, gwargwadon girman ƙirar bumper, farashin gyara zai ragu. Motoci da yawa saboda ƙarancin ƙirar bumper, idan karo da SUV, motar pickup ba ta da wani tasiri na buffer, lalacewar sauran sassan motar ma tana da girma sosai.
Kudin gyaran bumper na gaba ya fi tsada fiye da farashin gyaran bumper na baya.
Ɗaya daga cikinsu shine cewa bututun gaba yana ƙunshe da ƙarin sassan motar, yayin da bututun baya yana ƙunshe da abubuwa masu ƙarancin daraja kamar fitilun baya, bututun hayaki da ƙofofin akwati.
Na biyu, saboda yawancin samfuran an tsara su ne don su kasance ƙasa a gaba da tsayi a baya, bamper na baya yana da wani fa'ida a tsayi.
Masu rage ƙarfin tasirin na iya jure wa tasirin, yayin da masu rage ƙarfin tasirin na iya taka rawar watsa ƙarfi, watsawa da kuma buffering, sannan a ƙarshe su koma wasu sassan jiki, sannan su dogara da ƙarfin tsarin jiki don tsayayya.
Amurka ba ta ɗaukar bumper a matsayin tsarin tsaro ba: IIHS a Amurka ba ta ɗaukar bumper a matsayin tsarin aminci ba, amma a matsayin kayan haɗi don rage asarar karo mai ƙarancin gudu. Saboda haka, gwajin bumper kuma ya dogara ne akan ra'ayin yadda za a rage asarar da kuɗin kulawa. Akwai nau'ikan gwaje-gwajen haɗarin bumper IIHS guda huɗu, waɗanda sune gwaje-gwajen haɗarin gaba da na baya (gudun 10km/h) da gwaje-gwajen haɗarin gaba da na baya (gudun 5km/h).
