units are often classified by their output shaft orientation, which is to say
the place from which they power the application. The two most common output
shaft orientations are parallel and right-angle gear-motors so we will discuss
them in a little more detail below.
Differences Between Parallel and Right-Angle Gear-Motors
right-angle geared motor units tend to be less
efficient than the parallel gearmotor types, but they have other advantages
that make them the preferred option in many cases.
A right-angle variety
will typically include a worm gear assembly which will take the motor’s rotary
motion and redirect it by 90 degrees. Parallel gear motors are more versatile
and can come with a variety of configurations including spiral gears, helical
gears, spur gears, or even complicated planetary gear systems (more on these
below). The most efficient gear in a parallel gearmotor is usually a spiral
bevel gear, although the helical and spur gear types are not far behind.
efficient, right-angle gearmotors are particularly popular for applications
where space is at a premium, allowing the operator to fix the geared motor unit
without redesigning the whole machine.
Gearmotor Types: Planetary Gears
also define what type of gear motor it is, particularly the type of gears
within the motor that ultimately determine its performance. We’ve mentioned the
spiral, helical and spur gears, but let’s take a closer look at the complex
Planetary gear-motors are one of the more
common types, especially when installed in applications using a dc motor. The
structure of a planetary gear system consists of a central ‘sun’ gear, orbiting
‘planetary’ gears and the enclosing internal gear. The central sun gear sits on
the central axis surrounded by the planetary gears that mesh together with it, with
all the planetary gears and the sun gear safely enclosed within the larger
internal tooth gear.
several key advantages gained by using a planetary gearmotor instead of the
other types, with the main two being its high power density and its compactness
both with regards to its size and its weight. In addition to these advantages,
the efficiency levels and accuracy of a planetary gear is typically pretty high.
Because of the complex design and construction of a planetary gearmotor configuration,
they can usually cope with higher load requirements because the load is being
distributed across several gears instead of one or two. As a bonus, they also
produce hardly any backlash.
Surely there’s a
downside to these amazing gears, I hear you cry. Well yes, they tend to be more
expensive than other types of gear configurations, though this should really be
expected due to their much more complex design.
If you require any
geared motor units such as parallel or right-angle gearmotors, then contact
who are the UK’s leading gear-motors suppliers who keep local stocks ready to
ship out fast and free all over the UK and the rest of the world.