Automatic mechanical watches
Reporter : Su-Yu Lin 49912005
Wei-Hsiang Yang 49912029
Advisor : Ru-Li Lin
Department of Mechanical Engineering
Southern Taiwan University of Science
and Technology
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Directory
 The origin of the automatic mechanical watch ...... 3
 Mechanical watch movements principle ...... 4
 Basic knowledge of mechanical operation ...... 6
 The mechanical energy storage ...... 7
 Brief mechanical classification ...... 8
 Automatic mechanical watches mainly produce energy
principle ...... 9
 The difference between mechanical and quartz
watches……11
 References ...... 12
The origin of automatic mechanical
watches
 History:
 In 1770, the Swiss watchmakers Perrelet (Abraham-Louis
Perrelet) invention automatic mechanical watches for
the watch, then the design is more by Breguet (Abraham
Louis Breguet (Abraham-Louis Breguet), often called Po
Breguet, Bréguet) improvements.
 1923, Cayman Islands British summer living (John
Harwood), automatic mechanical watches invention.
 In 1930, Rolex summer living based design can improve
a 360-degree rotation of the pendulum Tuo, Tuo original
design can only swing 300 degrees.
Mechanical principle of operation
 Operating table is the use of leverage will spring
energy generated by the center wheel is sent to the
third round, fourth round, the escapement wheel,
cowboys ultimately to balance wheel, followed by
reaction of the balance wheel and then playing
cowboys back in place of a simple harmonic motion.
 When the spring to provide power to the center of the
wheel, the center of the wheel speed of 60 minutes will
be turning a circle, then begin to shift the case to the
third round, the migration to the fourth round is based
on the speed of 60 seconds a lap conducted rotary.
Basic knowledge of mechanical
operation
 In fact, watch the rotation is not the direct use of gear, but
the gear drives the pinion gear shaft and gear with each other.
 Mechanical power source is not the battery, but by the hand
chain winding or automatic winding.
 The most important infrastructure "barrel": curling steel
bars produced by elastic force caused.
The mechanical energy storage
 Energy storage, the mechanical structure simply, is set in
a round through the barrel of the Department of Large
bays, and complex gear train has a gear called the clutch
wheel, its role is winding back the full chain protecting
it is not sustainable on the chain which led to the
fracture, is an important protection mechanism, the
device is usually used for models on the list
automatically.
Brief mechanical classification
 In mechanical watches can be divided into:
 Manual mechanical watch: manual mechanical watches
usually via turning the crown / leading to tight winding
sheet, released by the spring system able to start out the
watch timer function. All of these processes by mechanical
principles and construction to complete.
 Automatic mechanical watch: automatic mechanical watch is
a modified manual mechanical watches, table joined in a
pendulum Tuo; When worn, oscillating weight may be due to
the rotation of the wrist activity table, and achieve the
"clockwork" effect.
Automatic mechanical watches mainly
produce energy principle
 The basic principle of automatic mechanical watch is a
natural by arm shaking, rocking back and forth so that
the oscillating weight inside the watch, and then
through the chain gear box automatically turn a wound
spring, the spring release of its own natural energy, then
through shift gears and escapement governor, causing
the second hand moves, and then make the minute hand
and the hour hand moves through the gear shift.
 Tuo:
Tuo automatic mechanical watch is a half-moon
centrifugal block pieces, usually located on the back of the
movement.
Tuo Videos:
https://www.youtube.com/watch?v=NY_t-s4ThBM
This piece is semi-circular oscillating weight, automatic
mechanical watch is relying on its rock to a wound.
The difference between mechanical
and quartz watches
One is purely mechanical, with the spring to drive the gear.
One is electronic, using battery power to drive the quartz oscillator to drive the gears.
Mechanical advantages
1. Mechanical watch without external power
2. No need to change the battery
3. Longer life
Mechanical shortcomings
1.Accuracy on the affected environment
2. Wearers so affected
1.
2.
3.
1.
2.
3.
4.
Quartz watch advantages
Battery as the power source, power
source stability
Time quite accurately
Because electronic circuit boards,
watches relatively thin, light
Quartz watch shortcomings
Must periodically replace the battery
Batteries also have pollution problems
Electronic circuit may also aging
Short-lived
Reference material
http://sh1.obuy.tw/candywatch/item.asp?item_id=586206
http://zh.wikipedia.org/wiki/%E6%89%8B%E9%8C%B6
http://zh.wikipedia.org/wiki/%E6%89%8B%E9%8C%B6
http://tw.knowledge.yahoo.com/question/question?qid=1205082404162
http://www.chinabaike.com/article/316/327/2007/2007022156629.html
http://tw.myblog.yahoo.com/jw!ES5GzQmYBR.DTM34x9Y/article?mid=1667
 http://bime-talks.blogspot.tw/2007/06/blogpost_7808.htmhttp://tw.myblog.yahoo.com/jw!ES5GzQmYBR.DTM34x9Y/article?mid=1667l
 http://www.relove.com.tw/pedia16.asp
 http://tw.images.search.yahoo.com/search/images?p=%E6%A9%9F%E6%A
2%B0%E9%8C%B6&fr=yfp&ei=utf-8&v=0
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 The main reference "Wikipedia"
Thanks for watching
The End