The objective of this dissertation is to, on Volvo Truck’s account, consider a fresh idea for the construction ingress utilized on construction vehicles that have a higher ground clearance than ordinary trucks. The high ground clearance causes it to be challenging for the driver to reach the first instep and thus a construction ingress is assembled below the stationary insteps. It is created in a way that avoids damage if colliding with objects. The current construction ingress employed is very costly, too complex and a bit unsteady to climb on. There is also a new construction vehicle being developed and the old ingress probably won’t fit the brand new truck. The idea generation is done using systematic concept development. There are several demands and requests for the ingress and these are summarized in a design criterion list. All wished-for properties can’t be fulfilled for the simplest ingress designs because they conflict with one another, for instance flexibility and stability…..
Contents
1 INTRODUCTION
1.1 THE COMPANY
1.2 CONSTRUCTION VEHICLES
1.3 AIM AND PURPOSE
1.4 LIMITATIONS
1.5 METHODOLOGY
2 BACKGROUND
2.1 CONSTRUCTION INGRESS
2.1.1 Function
2.1.2 Environment
2.1.3 Degrees of freedom
2.1.4 Sale
2.1.5 Assembly
2.1.6 Rules and Regulations
2.1.7 Ergonomics
2.2 THE VOLVO CONSTRUCTION INGRESS TODAY
3 SYSTEMATIC CONCEPT DEVELOPMENT
3.1 PHASE 1 – DESIGN CRITERION LIST
3.2 PHASE 2 – FUNCTION ANALYSIS
3.3 PHASE 3 – ESTABLISH CONCEPTS
3.4 BRAINSTORMING
3.5 EVALUATION MATRICES
3.5.1 Concept Screening Matrix
3.5.2 Concept Selection Matrix
3.6 THE FINITE ELEMENT METHOD
3.7 METHOD CRITICISM
4 CONCEPT GENERATION AND SELECTION
4.1 PHASE 1 – DESIGN CRITERION LIST
4.1.1 Critical Examination of the Problem
4.1.2 Benchmarking Trucks
4.1.3 Benchmarking Other Vehicles
4.1.4 Design Criterion List – KKL
4.2 PHASE 2 – FUNCTION ANALYSIS
4.2.1 Black-Box Models
4.2.2 Establish Technical Principles
4.2.3 Establish Function/Means-tree
4.3 PHASE 3 – ESTABLISH CONCEPTS
4.3.1 Choose means and create concepts
4.3.2 Examine and improve the concepts
4.3.3 Evaluate and choose concepts
4.3.4 Plan the subsequent development
4.4 DEVELOP THE CHOSEN CONCEPTS
4.4.1 Concept A
4.4.2 Concept B
4.4.3 Concept C
4.5 CONCEPT SELECTION
4.5.1 Opinions from people in contact with construction ingresses
4.5.2 Weighting of the degrees of freedom
4.5.3 Concept Selection
5 CONCEPT DESIGN
5.1 POSSIBLE DESIGNS OF CONCEPT C
5.1.1 Telescopic Function
5.1.2 Sliding Function
5.1.3 Two Jointed Suspensions
5.1.4 One Jointed Suspension
5.2 DESIGN SELECTION
6 DETAILED DESIGN
6.1 DIMENSIONS AND ANGLES
6.2 ROD
6.2.1 Dimensions
6.2.2 Material
6.3 JOINT
6.3.1 Hinge
6.3.2 Universal Joint
6.3.3 Torsion Springs
6.3.4 Final Joint Concept
6.3.5 Detailed Joint Design
6.3.6 Material and Assembly
6.3.7 Torsion Spring
6.4 FOOT PLATE
6.4.1 Dimensions and Material
6.4.2 Structure and Assembly
6.5 TOTAL ANALYSIS
7 DISCUSSION
7.1 FUNCTION
7.2 FUNCTION DETERMINING PROPERTIES………..
Source: Linköping University
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