Assemble the Tachometer model kit and discover how it works. The model kit
comes with a QR-code to the study guide about the mechanism, the principal of
its working, the main characteristics, formulas. It also includes interesting
assignments. Dive into augmented reality and look at how the Tachometer
works. Interact with the model via a special AR application from Ugears.
Learn how the Tachometer works
A tachometer is a device designed to
measure the rotational speed of various parts in engines and other mechanisms.
It calculates revolutions per minute (RPM). The tachometer also measures and
monitors load limits, in order to decrease or increase RPM so that the engine or
mechanism runs within its optimal parameters.
Who invented the
Tachometer, and when?
The tachometer was invented by the German engineer
Dietrich Uhlhorn in 1817. His invention was a special device that measured
centrifugal force. From 1840 on, this device has been used in railway
locomotives, and later in cars and all manner of vehicular transport.
Use
The tachometer is used in mechanisms where it is necessary to accurately
track RPM to avoid the negative consequences of overloads. Savvy motorists use
tachometers to know when to shift gears (in cars with manual transmissions) and
to control the load on the engine, thereby increasing the operating life of
their vehicles.
What the Tachometer consists of and how it works
The 3D Tachometer model kit from UGEARS' STEM Lab collection is a fully
operational DIY wooden model of a tachometer, ready for you to assemble. When
the handle is rotated, movement is transmitted through a reducer, increasing the
RPM and displacing twin weights in the centrifugal unit. The higher the RPM, the
more centrifugal force separates the weights, shifting a movable axle with
flywheel. A pointer mechanism (dial) is fixed to the axle; the more the axle
shifts (higher RPM), the more the dial arrow deflects, indicating higher speed
rotation.
The mechanism of the Tachometer model kit consists of:
Handle Reducer Weights Axle Flywheel Dial Connect the
Tachometer to the Variator, creating a new mechanism
The
Variator-Tachometer system demonstrates the direct relationship between the
transmission ratio of a gearbox, and rotational speed.
When the handle of
the Variator is rotated, the movement is transmitted through the reducer to the
cone-shaped driving pulley. The rotation of the first cone is then transmitted
through the belt to the other cone, which is the driven pulley. When the pedal
attached to the housing is pressed, it shifts the fork holding the belt, thereby
changing the rotational speed of the driven pulley. When the Tachometer is
attached to the Variator, the changing rotational speed of the driven pulley of
the Variator is transmitted to the Tachometer's reducer. This in turn will
increase or decrease the centrifugal force on the weights, shifting the axle
with flywheel. Shifting the axle deflects the indicator on the dial toward a
higher or lower value. In this way, changes to the transmission ratio in the
Variator will be seen to increase or decrease the RPM of the attached
Tachometer.
The Variator-Tachometer mechanism consists of:
●
Handle
● Reducer
● Cone-shaped driving pulley
● Cone-shaped
driven pulley
● Belt
● Pedal
● Housing
● Fork
● Reducer
● Weights
● Axle
● Flywheel
● Dial
Ugears STEM puzzles are designed to suit different age groups with a special
focus on learning component. The assembly of the model will be interesting and
won’t take much time.
STEM Lab Model kits come with all you need in a
box. Just like the rest of Ugears wooden model kits, putting STEM Lab models
together is fun and comprehensive: everything you need to build, learn, and
discover comes in a box. There you will find:
Wooden details pre-cut with
a precise high-tech laser in high-quality plywood boards, as well as other
materials required for assembly. DIY kits need no glue or additional instruments
to build. The details come out of the board with a slight push. Step-by step
illustrated instruction manual of 3D puzzles assembly. Practical Lab tasks
with use of your model. QR-code to download a pocket study guide about the
Ugears model, its mechanism, principle of its working, main characteristics,
physical and mechanical formulas, and fun practical tasks. QR-code to
download AR-application. Fascinating innovation from Ugears – new drive to learn
more new things! Model Size: 9.4 x 4.1 x 4.8 in Package size: 8.1 x 7.4 x
2.5 in Number of parts: 133 Level: Easy Assembly Time: 2 hours
Recommended Age: 8+ Kit weight: 0.94 lbs
;)