thang010146 | Linear deploying objects at equal distances 4a @thang010146 | Uploaded 11 months ago | Updated 2 days ago
Input: pink tube of system of helical slots.
Rotate the pink tube to move the sliders along the guide rods.
Each slider has a blue pin that slides in its helical slot of the pink tube.
The distances between the sliders are kept always equal to each other thanks to different leads of the helical slots.
L4 = 7*L1
L3 = 5*L1
L2 = 3*L1
L1 is the lead of the helical slots for the red sliders.
L2 is the lead of the helical slots for the orange sliders.
L3 is the lead of the helical slots for the yellow sliders.
L4 is the lead of the helical slots for the beige sliders.
Using four guide rods instead of two allows the guide bushings of the slides to be longer.
The lead angle of the helical slots should not exceed 45 degrees to maintain smooth movement.
This mechanism is called the pitch changer and finds application in pick and place devices:
youtu.be/jB7VYI_TBPc
youtu.be/4U1T9gez83c
See a real mechanism:
youtu.be/PtqVq9AQcB4

Inventor files of this video:
mediafire.com/file/z50p9802pgiymud/LinearDeployingObjectEqualDistances4aInv.zip/file