Abstract
Pins are simple and inexpensive components used to join and fasten machine elements together. They are usually employed when low to medium torques are to be transmitted. Different types of pins with different functions are available. However, in this chapter we only discuss shear pins, Clevis pins and Dowel pins. Pins are generally subjected to bending, crushing, and shearing stresses. All these stresses must be taken into account for their design. This chapter deals with designing pin joints using our proposed graphs.
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Abbreviations
- a :
-
Width of the fork or Clevis in a Clevis pin joint, mm
- b :
-
Total thickness at the shear pin location, mm
- b 1 :
-
Thickness of the sheet at the shear pin location, mm
- b 2 :
-
Width of the rod at the location of engagement in a Clevis pin joint, mm
- b 3 :
-
Engagement length of a cantilever pin in the body, mm
- D 1 :
-
Outer diameter of the reinforcement ring, mm
- D 2 :
-
Length of the rod at the location of engagement in a Clevis pin joint, mm
- D 3 :
-
Outer diameter of a hub, mm
- d :
-
Shaft diameter, mm
- d p :
-
In diameter, mm
- F :
-
Applied force, N
- H :
-
A coefficient for mounting style of clevis pin joints
- k :
-
A coefficient
- L :
-
Clevis length in Clevis pin joints, mm
- L F :
-
Distance between the applied force to cantilever pin and the surface of body, mm
- l :
-
The effective (or working) length of pin, mm
- m :
-
Ratio of the rod width (b2) to the pin diameter (dp) in a Clevis pin joint, ratio of the total fork width (2a) to the pin diameter (dp) in a Clevis pin joint
- m 2 :
-
Ratio of the engagement length (b3) to the pin diameter (dp) in a cantilever pin
- n :
-
Ratio of the total thickness (b) to the pin diameter (dp) in a shear pin
- n 2 :
-
Ratio of the distance between the applied force to the pin and the surface of body (LF), to the pin diameter (dp) in a cantilever pin
- p :
-
Allowable bearing stress, MPa
- p hub :
-
Bearing stress of hubs, MPa
- p shaft :
-
Bearing stress of shafts, MPa
- Q :
-
A coefficient for estimating the tolerable force in cantilever pin
- R m :
-
Tensile strength of pins, MPa
- T :
-
Torque, N·m
- t :
-
Thickness of the reinforcement ring, mm
- t 2 :
-
Difference between radii of the hub and shaft in a radial pin joint
- t 3 :
-
Thickness of a hub, mm
- t p :
-
Thickness of a hollow pin, mm
- σ b :
-
Allowable bending stress, MPa
- Ï„ :
-
Allowable shear stress, MPa
- Ï„ pin :
-
Shear stress of pins, MPa
References
Autodesk Inc. (2021) Engineer’s handbook. Retrieved from Autodesk Inventor support and learning center: https://knowledge.autodesk.com/
Decker K-H, Kabus K (2014) Decker Maschinenelemente: Funktion, Gestaltung und Berechnung. Carl Hanser Verlag, München (in German)
Jiang W (2019) Analysis and design of machine elements, 1st edn. Wiley, New Jersey
Orlov P (1988) Fundamentals of machine design. Mechanical engineering, Moscow (in Russian)
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Yaghoubi, M., Tavakoli, H. (2022). Pin Joints. In: Mechanical Design of Machine Elements by Graphical Methods. Materials Forming, Machining and Tribology. Springer, Cham. https://doi.org/10.1007/978-3-031-04329-1_14
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DOI: https://doi.org/10.1007/978-3-031-04329-1_14
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