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
The selection of module interface required to attach a farmingtractors to a number of different modules
Case Study - Trailer Coupling24 November 2012
08:32
10/12/2012 211/12/2012 2
Catalogue
Department of Industrial and
Manufacturing Engineering University of
Malta
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:
11/12/2012 4
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:
11/12/2012 5
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:
11/12/2012 6
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:
11/12/2012 7
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:
11/12/2012 8
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:
11/12/2012 9
Meeting Notes
Department of Industrial and
Manufacturing Engineering University of
Malta
Very complex 3 Dimensional form
Numerous parts
Trailer Coupling A24 November 201208:31
10/12/2012 1111/12/2012 11
to be assembled
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.
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
People
Department of Industrial and
Manufacturing Engineering University of
Malta
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