Zaɓin Madaidaicin Geometry don MTB Frame
Abubuwa
A cikin wannan labarin fasaha game da lissafi na keken dutse, mun rufe kowane bangare na C'est pas sorcier don zama bayyananne da ilimantarwa kamar Jamie. Kuna iya sanar da mu a cikin sharhi a ƙarshen labarin idan mun kammala aikinmu!
Ana neman sabon ATV?
Je zuwa kantin da kuka fi so don gwadawa.
Ee, muna ƙarfafa ku don gwada wasu samfuran har sai kun sami naku - da kyau, a yanzu, saboda abubuwan dandano, aikin ku, da ilimin halittar ku suna canzawa cikin shekaru.
Sai muka ce, ku gwada wasu kekunan tsaunuka. Girma iri ɗaya, nau'in keken dutse iri ɗaya, amma ba ku ji iri ɗaya ba, ba ku jin daɗi sosai akan su duka.
Dalili? Geometry na Keke.
Menene Geometry na Bike don menene?
ATV ya ƙunshi manyan sassa uku:
- firam ;
- cokali mai yatsa;
- ƙafafun.
(Bayan ƙara sirdi, sanduna, takalmi, batu ne na ta'aziyya da aiki.)
A halin yanzu, kowa yana kallo? To, mu ci gaba.
To, ma'auni na quad ɗin ku shine haɗuwa da waɗannan abubuwa guda uku da duk abin da ya zo tare da su (tsawon tube, kusurwa, da dai sauransu).
Gabaɗayan gine-ginen babur ɗin ku (saboda haka lissafin sa) yana rinjayar abubuwa da yawa da salon hawan ku musamman.
Duk da yake ba amsar duk cututtukan ku ba ne, ilimin lissafi wanda bai dace da ilimin halittar ku ba zai iya haifar da rashin jin daɗi, wanda ke ƙara zama mai ban haushi yayin doguwar tafiya. Yana yiwuwa a ɗan kama wani juzu'i tare da yanayin lissafi mara kyau (haɗi zuwa Yadda za a Zaɓi Girman MTB Dama da Daidaita MTB don Guji Ciwo na Knee), amma waɗannan saitunan ba za su taɓa maye gurbin MTB cikakke don nau'in jikin ku da hawan ku ba. salo.
Fahimtar Geometry na Bike
Tsarin bike na dutse
Muna ƙoƙari don rage girman firam ɗin zuwa tsayin babban bututunsa. A gaskiya ma, kusurwar bututun zama ne ke ƙayyade girman firam.
Ku kula da abubuwa guda uku:
- nisan da ke kwance tsakanin ƙugiya mai ƙugiya da cokali mai yatsa (kai);
- nisa a tsaye tsakanin crank axis da cokali mai yatsa (tari);
- nisa a kwance tsakanin crank axis da na baya dabaran axle (sarkar tsayawa).
Godiya ga wannan bayanan za ku daidaita tushe kuma, sabili da haka, ƙayyade matsayin ku akan bike.
Tsarin bike na dutse da cokali mai yatsa
Yanzu bari mu dubi gefen cokali mai yatsa da kuma yadda yake haɗuwa da firam. Domin, kamar kowane girke-girke, ba kawai ingancin kayan aikin ba ne ya dace ba, har ma da yadda ake rarraba su da haɗuwa.
Don fahimtar halin hawan keken dutse, za mu kuma kalli bayanai guda uku:
- nisa tsakanin crank axis da gaban dabaran axis;
- nisa tsakanin axle na gaba dabaran da axle na baya dabaran (wheelbase);
- kusurwar cokali mai yatsa da cokali mai yatsa (angle na nadi).
Kwangilar nadi don kwanciyar hankali na keken dutse
Za mu fayyace wannan labari game da farautar gawayi kadan.
A zahiri, wannan zai ba ku ra'ayi na juriya na ATV don canza alkibla kuma don haka ƙarfin da zaku yi amfani da shi don yin hakan.
Karamin kusurwar sitiyari da kusurwar simintin gyare-gyare, shine mafi kwanciyar hankali da ATV, amma yana da wahala a canza alkibla. Saboda haka, kokfit dole ne ya kasance mai amsawa da ƙarfi: sa'an nan kuma za mu shigar da wani ɗan gajeren kara da kuma mai fadi mai tsayi.
Tasirin joometry na keken dutse akan sarrafawa
Anan muke, kuma zaku fahimci dalilin da yasa ya zama dole muyi wannan ɗan ƙaramin ka'idar tafiya.
Me kuke nema don sarrafa ATV cikin sauƙi? Natsuwa da motsa jiki abubuwa ne guda biyu wadanda, a zahiri, sabanin haka. Yana da wuya a sami ATV wanda yake da tsayin daka kuma yana da ƙarfi sosai. Wannan ba shi yiwuwa a zahiri, kuma ilimin lissafi ya bayyana wannan.
Da zarar ka ƙara nisa da ake iya gani a sama, haka za ka ƙara kwanciyar hankali na ATV. Idan kuna neman babur mai iya motsi sama da komai, zaku gajarta waɗannan nisa.
Ya fi takamaiman, ko ba haka ba?
Amma a zahiri yana ɗan ƙara rikitarwa, saboda nau'ikan nau'ikan iri daban-daban, isa, tari, wheelbase, kusurwar karkata, da sauransu na iya bambanta sosai don girman firam ɗin daidai (kamar M ko L). Sabili da haka, wajibi ne a yi hankali tare da zabin girman kuma kula da lissafin da ake so. Ga kusan daidai gwargwado, ga wasu maki zai zama harafin M, wasu kuma zai zama L.
Ta yaya za ku san idan kuna buƙatar ƙarin kwanciyar hankali ko ƙarfi?
Ya danganta da saurin ku da kuma irin kwas ɗin da kuke bi.
Idan kuna son tuƙi kilomita tare da sarkar da kuma tuƙi cikin saurin walƙiya, da farko za ku yi ƙoƙarin samun kwanciyar hankali. A gefe guda, a ƙananan gudu, muna buƙatar keken dutse mai ƙarfi.
Shin kun saba zuwa kwasa-kwasan fasaha? Zaɓi ATV mai babban gindin ƙafafu da babban kusurwar tuƙi. Zai kasance tsayayye cikin sauri da sauri kuma ana iya tafiyar da shi a cikin tudu ko filayen.
Akasin haka, kuna son darussan fasaha? Dole ne kusurwar abin nadi ya zama babba don ƙirƙirar juriya lokacin canza alkibla. Yana jin sabani, amma da gaske ba haka bane. Lokacin farauta mai ƙarfi, matuƙin jirgin zai yi aiki a kan matsayinsa ba akan makullin tuƙi ba. Gilashin ƙafafun ATV ɗinku yakamata ya zama ɗan gajeren gajere don juyawa da sauri da sauƙi.
A cikin wannan rukuni na ƙarshe ne za mu sami kekunan tsaunuka don 'yan wasa. Waɗannan su ne tsofaffin kekuna waɗanda ke buƙatar ingantaccen matakin fasaha na tuƙi saboda mahayin ya yi aiki tuƙuru don sanya cibiyar ƙarfin nauyi da kulle tuƙi.
Masu kera a yau suna neman daidaita lissafin lissafi don ba da ƙarin kekunan tsaunuka iri-iri. Ƙaƙƙarfan ƙafar ƙafar ƙafar ƙafar ƙafar ƙafar ƙafar tana da tsayi sosai kuma korar tana da girma don ingantattun kekuna a cikin sauri. Matsayin matukin jirgi na tsakiya yana ba da damar ƙarancin matukin jirgi na acrobatic, amma yana buƙatar kyakkyawan karatun ƙasa, kyakkyawan fata, da matuƙar manufa.
Godiya ga Philippe Teno, Distinguished Micromechanic Mountain Biker da Restaurateur na sanannen Chalet Oudis a Les 7 Laux, don duk bayanan!
