Case Study: Trailer Coupling
Design Brief The objective of this case study is to determine the most suitable trailer coupling. This coupling is required to transfer forces from a family of agricultural tractors to a set of farming attachments. All the specifications of the concepts fulfil the design constraints.
University of Malta
Department of Industrial and Manufacturing Engineering
Case Study - Trailer Coupling 24 November 2012 08:32
The selection of module interface required to attach a farming tractors to a number of different modules
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Catalogue
University of Malta
Department of Industrial and Manufacturing Engineering
Name: Trailer coupling A Description: Ball coupling
Number of parts: 1 Horizontal Load (kg): 2722 Cost per coupling (Euros): 73.95 Comments:
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Degrees of Freedom: 3 Vertical Load (kg): 270 Material: Stainless Steel
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Name: Trailer coupling B Description: Pintle and Hook
Number of parts: 2 Horizontal Load (kg): 4536 Cost per coupling (Euros): 138.9 Comments:
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Degrees of Freedom: 2 Vertical Load (kg): 907 Material: Cast Iron
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Name: Trailer coupling C Description: Hook and Loop
Number of parts: 1 Horizontal Load (kg): 342 Cost per coupling (Euros): 45 Comments:
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Degrees of Freedom: 2 Vertical Load (kg): 3628 Material: Steel
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Name: Trailer coupling D Description: Quick coupling
Number of parts: 3 Horizontal Load (kg): 316 Cost per coupling (Euros): 274 Comments:
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Degrees of Freedom: 3 Vertical Load (kg): 3500 Material: Galvanized Steel
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Name: Trailer coupling E Description: Pin Coupling
Number of parts: 2 Horizontal Load (kg): 650 Cost per coupling (Euros): 409.2 Comments:
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Degrees of Freedom: 2 Vertical Load (kg): 6156 Material: Steel
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Name: Trailer coupling F Description: Pin coupling (2)
Number of parts: 2 Horizontal Load (kg): 270 Cost per coupling (Euros): 81.94 Comments:
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Degrees of Freedom: 2 Vertical Load (kg): 2722 Material: Steel
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Meeting Notes
University of Malta
Department of Industrial and Manufacturing Engineering
Trailer Coupling A 24 November 2012 08:31
Numerous parts to be assembled Very complex 3 Dimensional form
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Trailer Coupling B 19 November 2012 20:09
Numerous components need to be assembled
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Trailer Coupling C 19 November 2012 20:14
Needs welding
Known issues with the thickness of the rectangular tube
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Trailer Coupling D 19 November 2012 20:16
Known issues with shear failure of this pin
We do not have the capability of manufacturing all the components Most of the components MUST be bought.
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Trailer Coupling E 19 November 2012 20:18
Some hooks could not fit in this gap size, because it was too small
Challenging to manufacture
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Trailer Coupling F 19 November 2012 20:21
Based on past experience the thin section shears easily
2 Welded joints Overall concept very easy to manufacture
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People
University of Malta
Department of Industrial and Manufacturing Engineering
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