to DMG-Lib main page
Home  · Site map  · Contact  ·

Advanced Search   Mechanism Search

SPRING-DRIVE RATCHET MECHANISM

Click to enlargeClick to enlarge Description

When eccentric 1 rotates about fixed axis A, link 17 reciprocates and rotates ratchet wheel 2 intermittently. Wheel 2 is keyed on shaft 18 which rotates about fixed axis B. In its rotation, shaft 18 consecutively winds flat spiral springs 3, 4, 5, 6 and 7. The outer ends of these springs are attached inside drums 8, 9, 10, 11 and 12, and the inner ends to hubs of ratchet wheel 2 and of the drums. The inner end of spring 3 is attached to the hub of wheel 2, the inner end of spring 4 to the hub of drum 8, the inner end of spring 5 to the hub of drum 9, etc. Drum 12 is rigidly attached to (or integral with) gear 13 which is driven by the springs. To avoid overwinding the springs, a stop mechanism is provided, consisting of gears 14 and 15 carrying lugs a and b. After a certain number of revolutions , the lugs run up against each other, preventing further rotation of shaft 18. When this occurs, link 17 slides up and down on member 19 compressing and releasing spring 20. The springs can also be wound by hand, turning head 16 clockwise (in the same direction as wheel 2).
$2712$RG,ML$

Linked items
Documents: Gear mechanisms  [Streambook]
Permanent links
DMG-Lib FaviconDMG-Lib https://www.dmg-lib.org/dmglib/handler?image=19400023
Europeana FaviconEuropeana  http://www.europeana.eu/portal/record/2020801/dmglib_handler_image_19400023.html
Data provider
ITUIlmenau TU  http://www.tu-ilmenau.de
nach oben up
×