A worm
gear (or helical) is a
specific gear configuration in which gears / wheels similar to straight gears
and worms are coupled. This configuration allows the user to determine the
rotation speed and deliver a higher torque. This mechanism can be seen both at
home and in heavy equipment. The simplest form is obvious in the tuning
mechanism of an acoustic guitar.
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| Worm Gears |
There
are three types of worm gears.
1.Non-throated :-This
includes straight-line worms that are machined around the circumference. A
single point of movement provides contact with the teeth. This particular type
of worm is subject to high wear of the unit.
2.Single
throat: A spiral concave tooth is wrapped around the worm for contact
with the line. This means a higher unit load due to excessive wear.
3.Double
throat: This type, commonly called hourglass cone, has a concave tooth
in the worm and in the gear. Increasing the contact area in this way can result
in less wear on the unit due to low wear.
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| Worm Wheel |
Application of Worm Gear :-
Tuning
tools: Most guitars, basses, banjos and other string instruments use
an endless screw to operate the tuning mechanism. The reason why we want to
reduce the force of the gear is that it is combined with the locking function
to maintain the tension of the desired belt. This type of worm gear is very
different from what you can adjust up and down. Most helical gears can only rotate
in one direction.
Elevator
/ Elevator: Due to its compact size and its irreversible nature, the worm
gears can be found in a typical elevator / elevator machine. This type of gear can be
used as an auxiliary braking system because the gear / rod cannot transmit the
movement backwards through the worm / elevator. This means that the load cannot
fall freely and the speed of the load can be easily adjusted.
Torsen
differential: Large trucks or off-road vehicles, such as a Hummer, often
require different amounts of torque to be delivered to each wheel depending on
the work being performed by the vehicle. For example, the wheels must turn at
different speeds, and the internal wheels travel a shorter distance, turning
the corner. The Torsen differential of the vehicle handles this movement
through a combination of worm gears that separate the performance of each
wheel.
Gate
and conveyor belt: A typical worm can turn only in one direction. That is, the
conveyor belt and the safety gate are fixed when they are not in use and do not
move backwards. The automatic security door often adopts two screw units, one
open and one closed. This means that the door can be locked in each direction and
cannot be violated or imposed.
