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Mechanisms Quiz

Terms in this set (40)

name for work or effort being put into a mechanism
Input movement
the work the mechanism is performing?
Output Movement
Output movement may be used as input movement
Reversible
A twisting force
torque
speed at which the effort is put into the mechanism
input speed
Movement in a circular motion
rotary movement
movement in one direction in a straight line
linear movement
movement that goes back and forth in a straight line
reciprocating movement
movement along an arched path; back and forth
oscillating
The worm and wheel mechanism changes the direction of motion by ______ degrees.
90 degrees
Two mechanisms that are not reversible
worm and wheel, crank and slider
mechanism
a device that transmits movement so that the output movement is different than the input movement
meshed gears
always turn in opposite directions
reciprocating
back and forth in a straight line
oscillating
back and forth in an arc
rotary
around in a circle
linear
straight in one direction
force
push or pull in a straight line
torque
push or pull in a circular motion
gear ratio
number of teeth to number or teeth
inverse relationship between speed and torque
speed increases then torque decreases vice versa
automation
the use of technology to ease human labor
robotics
technology dealing with the design, construction, and operation of robots in automation
difference between automation and robotics
automation involves a mechanical device that can imitate the actions of people or animals while robotics involves the design, construction, and operation of a robot.
first generation robots
can complete simple tasks such as factory work or lifting heavy objects
second generation robots
are more complex, can sense their surroundings and respond to changes in environment
driven and drive
large driven and small drive, torque increases and speed decreases. small driven and large drive speed increases and torque decreases
why is speed and torque constant in simple gear train A?
the gears are the same size
what is the purpose of the idler gear
makes the drive and driven go in the same direction
what is the purpose of the bevel gear
changes the rotational motion 90•
is speed and torque increased or decreased on the worm and wheel
speed decreases, slowest mechanism, torque increased
what is the input and output movement of the leadscrew
input is rotary, output is linear
what is the input and output movement on the rack and pinion
input is rotary, creates torque, output is linear creates force
if the diameter of the pinion was increased would the rack move a shorter or longer distance
longer
is the flow of power reversible in the rack and pinion
yes
is the direction of travel reversible on the rack and pinion
yes
where is a rack and pinion used
steering systems
why chain instead of gears
transfers speed and torque longer distances
why would you use a belt drive instead of a chain
quieter, less expensive, you can twist it
wha mechanisms transfers rotary movement into linear, reciprocating, or oscillating
leadscrew, rack and pinion, can and follower, and crank and slider
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