{"id":4627,"date":"2014-07-26T11:00:30","date_gmt":"2014-07-26T11:00:30","guid":{"rendered":"http:\/\/www.rc-tabor.com\/wordpress\/?p=4627"},"modified":"2014-07-17T12:09:44","modified_gmt":"2014-07-17T12:09:44","slug":"maturitni-prace-jan-brich-poctvrte","status":"publish","type":"post","link":"https:\/\/www.rc-tabor.com\/wordpress\/?p=4627","title":{"rendered":"Maturitn\u00ed pr\u00e1ce \u2013 Jan Brich po\u010dtvrt\u00e9\u2026."},"content":{"rendered":"

\"Honza<\/p>\n

Pneumatiky\u00a0…<\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

<\/p>\n

\u00a08. Pneumatiky<\/h2>\n

Pneumatiky zaji\u0161\u0165uj\u00ed styk automobilu s\u00a0vozovkou. P\u0159en\u00e1\u0161ej\u00ed to\u010div\u00fd moment na vozovku. Disk s\u00a0pneumatikou nese hmotnost vozidla a p\u0159en\u00e1\u0161\u00ed ve\u0161ker\u00e9 s\u00edly, kter\u00e9 p\u016fsob\u00ed na automobil. Jsou d\u016fle\u017eit\u00fdm prvkem pro p\u0159enos j\u00edzdn\u00edho komfortu a bezpe\u010dnosti j\u00edzdy. Kolo vozidla sest\u00e1v\u00e1 z\u00a0disku a pneumatiky.<\/p>\n\n\n\n
1. Dez\u00e9n pneumatiky<\/strong>2. Disk kola (Alu disk)<\/strong>3. Bo\u010dnice pneumatiky (\u00fadaje v\u00fdrobce, sm\u011br ot\u00e1\u010den\u00ed, rok v\u00fdroby, typ pneumatiky)<\/strong><\/p>\n

4. D\u00edry pro uchycen\u00ed na n\u00e1boj<\/strong><\/p>\n

\u00a0\"obr.29\"<\/strong><\/p>\n

\u00a0<\/strong><\/p>\n

Obr.29 [12]<\/strong><\/p>\n

 <\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Pl\u00e1\u0161\u0165 je hlavn\u00ed \u010d\u00e1st pneumatiky, jeliko\u017e zaji\u0161\u0165uje styk s\u00a0vozovkou. Skl\u00e1d\u00e1 se p\u0159ibli\u017en\u011b z\u00a080% pry\u017ee, 15% vl\u00e1ken a 3% p\u0159ipadnou ocelov\u00fdm v\u00fdztuh\u00e1m.<\/p>\n\n\n\n
\n\n\n\n
\"obr.30\"Obr.30 \u0158ez pneumatikou [13]<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/td>\n1. Bo\u010dnice<\/strong>2. B\u011bhoun<\/strong><\/p>\n

3. Polyamidov\u00fd n\u00e1razn\u00edk<\/strong><\/p>\n

4,5. Ocelov\u00fd n\u00e1razn\u00edk a v\u00fdpl\u0148<\/strong><\/p>\n

6,7. Vnit\u0159n\u00ed guma s patkou<\/strong><\/p>\n

8. Kostra<\/strong><\/p>\n

9. V\u00fdpl\u0148 patky<\/strong><\/p>\n

10. Dr\u00e1t obvodov\u00e9ho lana<\/strong><\/p>\n

 <\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Pneumatiky se d\u011bl\u00ed do n\u011bkolika skupin dle ro\u010dn\u00edho obdob\u00ed a vyu\u017eit\u00ed. Z\u00e1kladn\u00edm rozd\u011blen\u00edm je obut\u00ed do zimy a l\u00e9ta, p\u0159i\u010dem\u017e hlavn\u00ed rozd\u00edly jsou ve sm\u011bsi pou\u017eit\u00e9 gumy a vzorku pl\u00e1\u0161t\u011b. Pokud by se zimn\u00ed pneumatiky pou\u017e\u00edvaly v\u00a0l\u00e9t\u011b, automobil by ztr\u00e1cel sv\u00e9 bezpe\u010dn\u00e9 j\u00edzdn\u00ed vlastnosti, doch\u00e1zelo by k\u00a0prodlou\u017een\u00ed brzdn\u00e9 dr\u00e1hy a v\u011bt\u0161\u00edmu opot\u0159eben\u00ed pneumatik. Vyr\u00e1b\u011bj\u00ed se i takzvan\u00e9 celoro\u010dn\u00ed pneumatiky, ale ty jsou doporu\u010dov\u00e1ny do m\u011bst, kde nehroz\u00ed \u0161patn\u00e9 pov\u011btrnostn\u00ed podm\u00ednky tak jako v\u00a0horsk\u00fdch podm\u00ednk\u00e1ch. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Pro speci\u00e1ln\u00ed p\u0159\u00edpady jako jsou z\u00e1vodn\u00ed akce, byly vyvinuty pneumatiky slick, rally pneumatiky (na \u0161otolinu) a pneumatiky s\u00a0h\u0159eby pro z\u00e1vody na zledovat\u011bl\u00e9m \u010di zasn\u011b\u017een\u00e9m povrchu.<\/p>\n

Na opot\u0159eben\u00ed m\u00e1 vliv \u0161patn\u00e9 nahu\u0161t\u011bn\u00ed pneumatik, \u0161patn\u00e1 geometrie n\u00e1prav vozu, kdy se pneumatika sj\u00ed\u017ed\u00ed nerovnom\u011brn\u011b a \u010dasto i vadn\u00fd tlumi\u010d automobilu, kter\u00fd nezaru\u010duje styk pneumatiky s\u00a0vozovkou a doch\u00e1z\u00ed takt\u00e9\u017e ke sj\u00ed\u017ed\u011bn\u00ed vzorku.<\/p>\n\n\n\n
\u00a0<\/strong>1. P\u0159ehu\u0161t\u011bn\u00e1 pneumatika<\/strong>2. Podhu\u0161t\u011bn\u00e1 pneumatika<\/strong>3. Vadn\u00e9 tlumi\u010de<\/strong><\/p>\n

4. \u0160patn\u00e1 geometrie vozu<\/strong><\/p>\n

5. Prudk\u00e9 br\u017ed\u011bn\u00ed<\/strong><\/p>\n

\u00a0\"obr.31\"<\/strong><\/p>\n

Obr.31[14]<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

9. Pneumatiky na modelech 1:10<\/h2>\n

Pneumatiky jsou stejn\u011b tak, jako u dosp\u011bl\u00fdch vozidel nepostradatelnou sou\u010d\u00e1st\u00ed modelu. Zprost\u0159edkov\u00e1vaj\u00ed kontakt auta s\u00a0povrchem a p\u0159en\u00e1\u0161ej\u00ed vznikl\u00e9 s\u00edly. D\u00edky pneumatik\u00e1m se dok\u00e1\u017ee model uv\u00e9st do pohybu, zastavit, \u010di bezpe\u010dn\u011b projet zat\u00e1\u010dkou. Stejn\u011b tak v re\u00e1ln\u00e9m sv\u011bt\u011b i na na\u0161e modely existuje velik\u00e9 mno\u017estv\u00ed pneumatik.<\/p>\n

Oproti pneumatik\u00e1m, kter\u00e9 se pou\u017e\u00edvaj\u00ed u velk\u00fdch automobil\u016f, m\u00e1 pl\u00e1\u0161\u0165 jednodu\u0161\u0161\u00ed konstrukci, kter\u00fd je tvo\u0159en pouze gumov\u00fdm v\u00fdliskem, bez pou\u017eit\u00ed ocelov\u00e9 v\u00fdztuhy p\u0159\u00edpadn\u011b jin\u00fdch vl\u00e1ken. Pl\u00e1\u0161t\u011b nejsou hu\u0161t\u011bny vzduchem, ale uvnit\u0159 je pouze p\u011bnov\u00e1 vlo\u017eka, kter\u00e1 d\u00e1 pneumatice pot\u0159ebn\u00fd tvar. P\u011bnov\u00e9 vlo\u017eky maj\u00ed mnoho tvrdost\u00ed a tvar\u016f. Nej\u010dast\u011bji se v\u0161ak pou\u017e\u00edvaj\u00ed vlo\u017eky dod\u00e1van\u00e9 v\u00fdrobcem p\u0159\u00edmo v\u00a0sad\u011b s\u00a0pl\u00e1\u0161t\u011bm.<\/p>\n

 <\/p>\n\n\n\n
1. Plastov\u00fd disk<\/strong>2. Pneumatika<\/strong>3. Molitanov\u00e1 vlo\u017eka<\/strong><\/p>\n

4. P\u011bnov\u00e9 vlo\u017eky<\/strong><\/p>\n

\u00a0\"obr.32\"<\/strong>\u00a0<\/strong><\/p>\n

Obr.32<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

Prvkem, kter\u00fd je pro model nem\u00e9n\u011b podstatn\u00fdm, je disk. Pou\u017e\u00edvaj\u00ed se plastov\u00e9 disky, kter\u00e9 jsou u dra\u017e\u0161\u00edch produkt\u016f dopln\u011bny skeln\u00fdm vl\u00e1knem. Disky jsou vyr\u00e1b\u011bn\u00e9 v\u00a0\u0161irok\u00e9 \u0161k\u00e1le, dle po\u017eadavk\u016f z\u00e1kazn\u00edka. V\u00a0p\u0159\u00edpad\u011b \u017ee z\u00e1kazn\u00edk po\u017eaduje u\u017e\u0161\u00ed rozchod kol, vybere si disk s\u00a0tzv. 0mm offsetem.<\/p>\n

Jedn\u00edm z\u00a0testovan\u00fdch prvk\u016f praktick\u00e9 \u010d\u00e1sti bude zm\u011bna pneumatik a jejich n\u00e1sledn\u00e9 chov\u00e1n\u00ed na stejn\u00e9m povrchu. Nyn\u00ed si p\u0159edstav\u00edme jednotliv\u00e9 skupiny pneumatik, p\u0159edev\u0161\u00edm podle dez\u00e9nu pl\u00e1\u0161t\u011b a jeho n\u00e1sledn\u00e9ho vyu\u017eit\u00ed v\u00a0praxi.<\/p>\n

9.1 Asfaltov\u00e9 pneumatiky<\/h4>\n

Testov\u00e1n\u00ed bude prob\u00edhat na z\u00e1vodn\u00edm podvozku, proto je dez\u00e9n pneumatik velmi odli\u0161n\u00fd od s\u00e9riov\u00e9ho vzorku pou\u017e\u00edvan\u00e9ho na b\u011b\u017en\u00e9m automobilu silni\u010dn\u00edho provozu. Pneumatiky jsou pou\u017e\u00edvan\u00e9 p\u0159edev\u0161\u00edm pro \u010dist\u00fd asfaltov\u00fd povrch. Pneumatiku na prav\u00e9 stran\u011b lze pou\u017e\u00edt i pro m\u00edrn\u011b zne\u010di\u0161t\u011bn\u00e9 povrchy.<\/p>\n\n\n\n
\n\n\n\n
\"obr.33\"\u00a0\u00a0\u00a0\u00a0\u00a0 <\/strong><\/p>\n

Obr.33<\/strong><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/td>\n

1. Pneumatika slick s\u00a0hladk\u00fdm b\u011bhounem<\/strong>\u00a0<\/strong>2. Pneumatika Pirelli ur\u010den\u00e1 pro asfaltov\u00e9 \u010di m\u00edrn\u011b zne\u010di\u0161t\u011bn\u00e9 povrchy.<\/strong><\/p>\n

 <\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

9.2 \u0160otolinov\u00e9 pneumatiky<\/h4>\n

\u0160otolinov\u00e1 pneumatika ARP Rally Block se \u0159ad\u00ed mezi nejuniverz\u00e1ln\u011bj\u0161\u00ed pneumatiky na trhu. Jejich v\u00fdhodou je pom\u011br tvrdost sm\u011bsi a jejich v\u00fddr\u017e. Prozlep\u0161en\u00ed j\u00edzdn\u00edch vlastnost\u00ed je mo\u017enost pro\u0159ez\u00e1v\u00e1n\u00ed dez\u00e9nu do tvar\u016f po\u017eadovan\u00fdch u\u017eivatelem. Na obr\u00e1zku jsou vyobrazeny dva typy nejpou\u017e\u00edvan\u011bj\u0161\u00edch pro\u0159ez\u00e1van\u00ed, vpravo ARP Rally Block vyst\u0159ih\u00e1v\u00e1n do asymetrick\u00e9 podoby (vnit\u0159n\u00ed (lev\u00e1) strana zaji\u0161\u0165uje trakci pro pohyb kup\u0159edu, vn\u011bj\u0161\u00ed (prav\u00e1) strana zaji\u0161\u0165uje trakci v\u00a0zat\u00e1\u010dk\u00e1ch). V\u00a0z\u00e1vodech RC rally se nej\u010dast\u011bji pou\u017e\u00edv\u00e1 na sm\u00ed\u0161en\u00fdch trat\u00edch, kdy se v\u00a0z\u00e1vod\u011b st\u0159\u00eddaj\u00ed r\u016fzn\u00e9 povrchy.<\/p>\n

\"obr.34\"<\/p>\n

\u00a0<\/strong>Obr.34<\/strong><\/p>\n

 <\/p>\n

9.3 Sn\u011bhov\u00e9 z\u00e1vodn\u00ed pneumatiky<\/h4>\n

Pneumatika Ripmax se vyzna\u010duje velmi m\u011bkkou sm\u011bs\u00ed a vzorkem, kter\u00fd trp\u00ed rychl\u00fdm opot\u0159eben\u00edm. Nej\u010dast\u011bji se pou\u017e\u00edvaj\u00ed na ledu, \u010di sn\u011bhu, kde d\u00edky \u0161punt\u00edk\u016fm maj\u00ed v\u00fdbornou trakci. \u010casto se pou\u017e\u00edvaj\u00ed i na \u0161otolinov\u00fdch trat\u00edch, kde je velk\u00e9 mno\u017estv\u00ed voln\u00e9 \u0161otoliny. Nevhodn\u00e9 jsou sv\u00fdm vzorkem na asfalt, kde doch\u00e1z\u00ed k\u00a0velk\u00e9mu opot\u0159eben\u00ed a \u0161patn\u00fdm j\u00edzdn\u00edm vlastnostem.<\/p>\n

\"obr.35\"<\/p>\n

Obr.35<\/strong><\/p>\n

V\u00a0dal\u0161\u00edm \u010dl\u00e1nku n\u011bco m\u00e1lo k nastovov\u00e1n\u00ed…<\/p>\n","protected":false},"excerpt":{"rendered":"

Pneumatiky\u00a0…      <\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-4627","post","type-post","status-publish","format-standard","hentry","category-ostatni"],"_links":{"self":[{"href":"https:\/\/www.rc-tabor.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/4627","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.rc-tabor.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.rc-tabor.com\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.rc-tabor.com\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.rc-tabor.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4627"}],"version-history":[{"count":0,"href":"https:\/\/www.rc-tabor.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/4627\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.rc-tabor.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4627"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.rc-tabor.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4627"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.rc-tabor.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4627"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}