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)