Quarky Creator's Kit Course

Topic 2: Assembly of Basic Linkage Mechanisms

Lesson 3: Mechanism Construction

The Creator's Kit has various links in multiple sizes and quantities. These links can be connected using fasteners. Custom mechanisms can be created which need an axial motion from one point to another.

In these types of mechanisms, a lock nut is preferred more than a regular nut. A lock nut, also known as a self-locking nut, is a type of fastener that resists loosening when subjected to vibration or torque.

M3 Lock Nut - a hexagonal metal nut with a nylon insert for self-locking
M3 Lock Nut
M3 Lock Nut assembled into a wooden linkage strip showing how it connects two links
M3 Lock Nut in Linkages

Screw the M3 lock nut onto a bolt connecting two links in the same manner as a regular nut, as illustrated in the image above. Points A and B should NOT wobble and must rotate smoothly about the axis.

Below given is the assembly of basic linkage mechanisms:

Corner Linkage Mechanism

Corner Linkage Mechanism assembled from two golden wooden strips connected at a pivot point forming an angled shape

Corner Linkage – Parts Used

Item NameTypeQty
Strip (1-9)Wooden Part2
M3 Bolt (12mm)Fastener1
M3 Lock NutFastener1

Assembly Steps

Exploded view of Corner Linkage Mechanism showing M3 bolt and M3 lock nut assembly through two wooden strips

Corner Linkage – Assembly Steps

  • Take two strips (wooden parts) and align the end holes of each strip.
  • Insert M3 Bolt (12mm) and M3 Lock Nut at the other end.
  • Tighten the M3 Lock Nut and it will give you a joint for rotational motion.

Cross Linkage Mechanism

Cross Linkage Mechanism assembled from two golden wooden strips crossing at a central pivot point forming an X shape

Cross Linkage – Parts Used

Item NameTypeQty
Strip (1-9)Wooden Part2
M3 Bolt (12mm)Fastener1
M3 Lock NutFastener1

Assembly Steps

Exploded view of Cross Linkage Mechanism showing M3 bolt and M3 lock nut assembly through two crossing wooden strips

Cross Linkage – Assembly Steps

  • Take two strips (wooden parts) and align the center holes of each strip.
  • Insert M3 Bolt (12mm) and M3 Lock Nut at the other end.
  • Tighten the M3 Lock Nut and it will give you a joint for rotational motion. Use the middle of the strips.

Parallel Linkage Mechanism

Parallel Linkage Mechanism assembled from four golden wooden strips connected at corner pivot points forming a rectangular frame

Parallel Linkage – Parts Used

Item NameTypeQty
Strip (1-9)Wooden Part2
Strip (1-5)Wooden Part2
M3 Bolt (12mm)Fastener4
M3 Lock NutFastener4

Assembly Steps

Exploded view of Parallel Linkage Mechanism showing M3 bolts and M3 lock nuts assembly through four wooden strips at corners

Parallel Linkage – Assembly Steps

  • Take two strips (1-9) and two strips (1-5) and align the same size strips parallelly.
  • Insert M3 Bolt (12mm) and M3 Lock Nut at the four corners.
  • Tighten the M3 Lock Nuts.
  • This will give you a rhombus shape with a parallel linkage movement.

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