Prijedlog konstrukcije za osiguranje podesivog kontakta s pedalom bicikla

master's thesis

• Title (english): Design proposal for ensuring adjustable bicycle pedal contact
• Author: Tomislav Šokčević
• Mentor: Aleksandar Sušić (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2016-05-19, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering; General Mechanical Engineering (Construction)

Abstract

Tema ovog diplomskog rada je prijedlog konstrukcije za osiguranje podesivog kontakta biciklista s pedalom bicikla. Na tržištu već dugi niz godina postoje pedale s ciljem osiguranog i podesivog kontakta, tako da je prvo provedena analiza najpoznatijih i komercijalno najuspješnijih tvrtki kojima je to područje djelovanja. Prepoznata je potreba za konstrukcijom koja će korisnicima omogućavati lakše podešavanje položaja stopala na pedali, ali i pružiti osiguranje od neželjenog prekida kontakta s pedalom.

Potom je provedena biomehanička analiza, od aktivacije mišića do stupnjeva slobode gibanja donjeg dijela tijela pri bicikliranju. Također su obrađene raznovrsne poteškoće i ozljede. Njihovi uzroci prikazani su kroz kombinaciju iskustava profesionalaca i znanja stečenih biomehaničkom analizom.

Prikazana je važnost prilagodbe korisniku, odnosno velika štetnost prisilnog prilagođavanja tijela biciklu. Stoga su navedene opće prihvaćene smjernice za namještanje bicikla i postizanje pravilnog položaja.

Na temelju postavljenih zahtjeva provedena je metodička razrada koncepata za rješenje problema, popraćena skicama i opisima. Prije daljnje razrade navedene su prednosti i nedostaci koji se očekuju u svakom konceptu. Zatim slijedi vrednovanje koncepata po ključnim karakteristikama i funkcijama. Razrađuje se koncept koji omogućava podešavanje „Q“ faktora, a kontakne površine osigurava oblikom. Za razrađeni koncept izrađen je 3D model i tehnička dokumentacija u programskom paketu Creo Parametric 2.0.

Abstract (english)

The subject of this master's thesis is a design proposal for ensuring adjustable contact between a bicycle and a cyclist. Pedals with adjustable contact have been on the market for many years, so an analysis of the most famous and commercially successful companies in this field has been performed. It is found that there's a need for a design which will allow easier adjustment of the foot position on the pedal, as well as offer insurance against unwanted release of contact with the pedal.

Subsequently, a biomechanical analysis has been performed, from muscle activation to degrees of freedom of lower body parts while cycling. Various difficulties and injuries have also been studied. Their causes are presented through combination of professionals' experiences and knowledge gained by the biomechanical analysis.

The importance of adjusting to the user has been presented, that is, the great damage of forcing the body to adapt to the bicycle. Some generally accepted guidelines for bicycle adaptation and proper posture have been displayed accordingly.

Based upon the given requirements, a methodical assessment of problem-solving concepts has been done, complementary with sketches and descriptions. Before further analysis, the strengths and weaknesses expected from each of the concepts have been brought forward. Afterwards, the key characteristics and functions of concepts are evaluated. The concept which allows adjustment of the „Q“ factor, as well as ensures contact surfaces by form, is further developed. For the developed concept, a 3D model and technical documentation have been made in Creo Parametric 2.0 software package.

• Keywords: bicikl; pedala; biomehanika; analiza; sigurnost; podesivost; prijedlog; konstrukcija
• Keywords (english): bicycle; pedal; biomechanics; analysis; safety; adjustability; proposal; design
• Language: croatian
• URN:NBN: urn:nbn:hr:235:851389
• Study programme: Title: Mechanical Engineering; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka strojarstva (magistar/magistra inženjer/inženjerka strojarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2019-05-22 16:35:11