Podizač na bazi osmokrakog polužnog mehanizma s približno linearnim kretanjem

master's thesis

• Title (english): Lift based on an eight-arm lever mechanism with approximately linear movement
• Author: Ante Bubalo
• Mentor: Matija Hoić (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2023-07-21, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering; General Mechanical Engineering (Construction)

Abstract

U ovom radu konstrukcijski je razrađen podizač na bazi osmokrakog polužnog mehanizma.
Osnosvna ideja primjene ovakvog mehanizma je ostvarivanje relativno velike visine dizanja
uz minimalan horizontalan pomak. Zahtjevi postavljeni na mehanizam definiraju najveći teret
od 500 kg, potrebnu visinu dizanja od 1 m, te brzinu dizanja od 10 m/min. Za izbor pogona
ostavljen je izbor između hidrauličkog i elektromehaničkog. Tijekom razrade zaključeno je da
je hidraulički pogon prikladniji pa krajnje rješenje podizača pogone dva, simetrično
postavljena hidraulička mehanizma. U radu su najprije određene dimenzije elemenata koje će
osigurati traženu visinu dizanja. Nakon kinematske analize mehanizma i određivanja sila u
najnepovoljnijem poloţaju, dan je proračun osnovnih elemenata mehanizma: nosive
platforme, poluga, postolja i pogonskog mehanizma. Na kraju je na temelju CAD modela
izrađena tehnička dokumentacija.

Abstract (english)

The theme of this thesis is design of lift based on eight-armed lever mechanism that has
approximately linear movement. The main idea behind this design is acheiving significant
vertical lift whilst minimising horizontal movement. Request for this mechanism is to achieve
lift capacity of 500 kg with lifting height of 1 m and lifiting speed of 10 m/min. For drive
force there was possibility to choose between hydraulic and electric power. After assesment
of design it was decided to use hydraulic cylinder to drive this mechanism. Final solution
includes two simmetricaly positioned hydraulic cylinders. Workflow was to first assign
proper dimensions of elements that would deliver desired lifting height. After that kinematic
analysis was performed, followed by determination of active forces acting on components of
mechanims. In the end technical documentation was derived form CAD models of the
mechanism.

• Keywords: podizač; paralelne poluge; smanjen horizontalni pomak; polužni mehanizam
• Keywords (english): lift; parallel links; lever mechanism; reduced horizontal movement
• Language: croatian
• URN:NBN: urn:nbn:hr:235:202891
• 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: Other
• File origin: Born digital
• Access conditions: Open access
• Created on: 2023-07-20 12:12:44