Download - Trailer Coupling
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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.
Department of Industrial and
Manufacturing Engineering University of
Malta
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The selection of module interface required to attach a farmingtractors to a number of different modules
Case Study - Trailer Coupling24 November 2012
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Catalogue
Department of Industrial and
Manufacturing Engineering University of
Malta
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Name: Trailer coupling A
Description: Ball coupling
Number of parts: 1 Degrees of Freedom: 3
Horizontal Load (kg): 2722 Vertical Load (kg): 270
Cost per coupling (Euros): 73.95 Material: Stainless Steel
Comments:
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Name: Trailer coupling B
Description: Pintle and Hook
Number of parts: 2 Degrees of Freedom: 2
Horizontal Load (kg): 4536 Vertical Load (kg): 907
Cost per coupling (Euros): 138.9 Material: Cast Iron
Comments:
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Name: Trailer coupling C
Description: Hook and Loop
Number of parts: 1 Degrees of Freedom: 2
Horizontal Load (kg): 342 Vertical Load (kg): 3628
Cost per coupling (Euros): 45 Material: Steel
Comments:
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Name: Trailer coupling D
Description: Quick coupling
Number of parts: 3 Degrees of Freedom: 3
Horizontal Load (kg): 316 Vertical Load (kg): 3500
Cost per coupling (Euros): 274 Material: Galvanized Steel
Comments:
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Name: Trailer coupling E
Description: Pin Coupling
Number of parts: 2 Degrees of Freedom: 2
Horizontal Load (kg): 650 Vertical Load (kg): 6156
Cost per coupling (Euros): 409.2 Material: Steel
Comments:
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Name: Trailer coupling F
Description: Pin coupling (2)
Number of parts: 2 Degrees of Freedom: 2
Horizontal Load (kg): 270 Vertical Load (kg): 2722
Cost per coupling (Euros): 81.94 Material: Steel
Comments:
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Meeting Notes
Department of Industrial and
Manufacturing Engineering University of
Malta
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Very complex 3 Dimensional form
Numerous parts
Trailer Coupling A24 November 201208:31
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to be assembled
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Numerous components need to be assembled
Trailer Coupling B19 November 201220:09
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Needs welding
Known issues with the thickness of the rectangular tube
Trailer Coupling C19 November 201220:14
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Known issues with shear failure of this pin
Trailer Coupling D19 November 201220:16
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We do not have the capability of manufacturing all the componentsMost of the components MUST be bought.
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Some hooks could not fit in this gap size, because it was too small
Challenging to manufacture
Trailer Coupling E19 November 201220:18
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2 Welded joints
Overall concept very easy to manufacture
Trailer Coupling F19 November 201220:21
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Based on past experience the thin section shears easily
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People
Department of Industrial and
Manufacturing Engineering University of
Malta
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