Types of Links Secondary 3 ST
Dec 18, 2015
Types of Links
Secondary 3 ST
Links
• Help connect two or more parts of a technical object
• Linking is the basic mechanical function provided by any component that links an object’s parts or parts of different objects
• A linking component is one that has the basic mechanical function of linking
Types of Links
Types of Links
1. Fixed (embedding)2. Rotating (pivot)3. Sliding4. Sliding rotating (sliding + pivot)5. Spherical (ball joint)6. Helical7. Support base link
Words To Know:
1. Translational:– Back and forth movement– It CAN move back and forth:– It CANNOT move back and forth:
2. Rotational– Rotating movement– It CAN rotate:– It CANNOT rotate:
Fixed link(a.k.a. embedded link)
• There is no movement between linked parts
Screen & case
Red arrows indicate no translation or rotation
Fixed link(a.k.a. embedded link)
Rotating link(a.k.a. pivot link)
• The guided part can undergo rotational motion around one axis
Door Hinge
Rotating link(a.k.a. pivot link)
Sliding link
• The guided part can undergo translational motion along one axis
Drawer Slides
Sliding rotating link(a.k.a. sliding pivot)
• The guided part can undergo rotational and translational motion on the same axis, separately (independently)
Seat post & seat tube
Sliding rotating link(a.k.a. sliding pivot)
Spherical link(a.k.a. ball joint)
• The guided part can undergo rotational motion in many directions
Joystick
Spherical link(a.k.a. ball joint)
Helical link• The guided part can undergo helical motion. Unlike
sliding-rotating link, during helical motion a part must rotate AND translate (move back/ forth) at the same time)
Nut and bolt
Helical link
Support Base Link
• Can undergo movement parallel to the support base only
• Computer Mouse
Graphical Language Symbols(related to guidance and linking)