Table of Contents
Advertisement
Quick Links
See also:
Manual
4
MECHANICS
Laboratory
RACING CARS
1
30
to
Constructions
12-Build a class 1 lever: pincers
13-Build a class 2 lever: nutcracker
14-Build a class 3 lever: tongs
16-Assemble and test a lever with mechanical advantage
18-Assemble and test a lever with mechanical disadvantage
19-Assemble a balance
20-Build and test a see-saw
29-Assemble the gearbox with a differential cage
30-An ancient war machine: the battering ram
UK SUBSIDIARY: Clementoni UK Ltd.
Unit 10 - Brook Business Centre -
Cowley Mill Road – UXBRIDGE - UB8 2FX
P. +44 203 383 2020 - uk@clementoni.com
MANUFACTURER: Clementoni S.p.A.
Zona Industriale Fontenoce s.n.c.
62019 Recanati (MC) - Italy
Tel.:+39 071 75811 - www.clementoni.com
Advertisement
Table of Contents
Related Manuals for Clementoni 61591
Summary of Contents for Clementoni 61591
- Page 1 30-An ancient war machine: the battering ram UK SUBSIDIARY: Clementoni UK Ltd. Unit 10 - Brook Business Centre - Cowley Mill Road – UXBRIDGE - UB8 2FX P. +44 203 383 2020 - uk@clementoni.com MANUFACTURER: Clementoni S.p.A. Zona Industriale Fontenoce s.n.c. 62019 Recanati (MC) - Italy...
- Page 2 Stacking two beams Assembled beams Stacking beams with two pegs Two pegs make the construction very robust! Assembled beams Joining beams Assembled beams...
- Page 3 Stacking three beams Assembled beams Stacking beams perpendicularly Assembled beams Stacking with an L-shaped beam Assembled beams...
- Page 4 Build a square with beams Final assembled model Stacking four beams Final assembled model...
- Page 5 Build a parallelepiped Semi-assembled model Final assembled model...
- Page 6 Build a simple bridge Final assembled model Assemble cogwheels on a rod Final assembled model Try it out as a spinning top!
- Page 7 SIMPLE MACHINES Since ancient times humans have made use of many of these mech- anisms to increase their strength and enable them to accomplish great feats which can still be Pincers admired today. Wheelbarrow Nutcracker See-saw Balance Pulley A simple machine is an instrument that allows for balancing and overcoming RESISTANCE (weight, resistance force = R) with EFFORT...
- Page 13 Scientific analysis: mechanical advantage with levers The lever is a simple machine built by man to perform work by reducing the force required. Two forces are applied on the rod: EFFORT and RESISTANCE. Using a lever, therefore, we have a MECHANICAL ADVANTAGE that can be calculated by considering also the length of the EFFORT RESISTANCE...
- Page 14 ASSEMBLING THE WEIGHT Assembled weight In Activities 16-17-18 try moving the fulcrum and then applying downward pressure to the EFFORT arm with your hand to see the differences between the levers.
- Page 15 Assemble and test a mechanically advantaged lever Find the equilibrium of this type of mechanical device: position the weight (RESISTANCE) on one side of the lever and gently press down with your hand (EFFORT) on the other side. Note the position of the fulcrum! •...
- Page 16 Assemble and test a mechanically neutral lever Find the equilibrium of this type of mechanical device: position the weight (RESISTANCE) on one side of the lever and gently press down with your hand (EFFORT) on the other side. Note the position of the fulcrum! •...
- Page 17 Assemble and test a mechanically disadvantaged lever Find the equilibrium of this type of mechanical device: position the weight (RESISTANCE) on one side of the lever and gently press down with your hand (EFFORT) on the other side. Note the position of the fulcrum! •...
- Page 20 In the third century BC, Archimedes was a great scientist and experimenter with levers. Note: the lever of the see-saw must rotate freely around the fulcrum. Try it yourself: find the equilibrium of the see-saw by varying the weight and distances from the fulcrum of the Resistance and Effort forces.
- Page 21 COGWHEELS Cogwheels transmit motion between suitably positioned axles (rods) via teeth. • In a pair of cogwheels, if one cogwheel turns in one direction the other turns in the opposite direction. One of the two wheels transmits motion (drive wheel) while the other receives it (driven wheel). •...
- Page 22 Anti-clockwise Clockwise Final assembled model...
- Page 23 Build and test forward rotation Stand assembled in Activity 21 Clockwise Clockwise Final assembled model...
- Page 24 Assemble and test alternating movement Stand assembled in Activity 21 180° Final assembled model...
- Page 25 Assemble a vertical gearbox Stand assembled in Activity 21 180°...
- Page 26 180° Final assembled model...
- Page 27 Build a horizontal to vertical gearbox Stand assembled in Activity 21 GEAR RATIO Carefully observe the cogwheels when they rotate and compare the number of revolutions completed by the various cogwheels. When the larger cogwheel has completed a revolution, the small- er one will have completed 4.
- Page 28 PRE-ACTIVITY TASK Assemble a test stand for the gearbox elements Assembled stand...
- Page 29 The worm screw for lifting Technical and scientific analysis Technically called an involute, the worm screw is a cylindrical Stand assembled helical gear. in the pre-activity task In a worm-and-gear set, the former is called the ‘driver’, because motion can only be transferred from the worm screw to the gear and not vice-versa.
- Page 30 The worm screw as a reduction gear Gear ratio The worm screw makes it possible to achieve high reductions. Turn the wheel and see how the gear rotates slowly. Stand assembled in the pre-activity task Check the assembly! Final assembled model...
- Page 31 Using the transmission module for counter-rotation Insert the module between the beams, by partially disassembling the stand. Then Stand assembled arrange the gears as shown in the picture. in the pre-activity task TRY IT OUT! Final assembled model...
- Page 32 Assemble the transmission with a differential cage Stand assembled in the pre-activity task TRY IT OUT! Final assembled model...
- Page 36 Final assembled model...