Power Transmission

Created by

Prudent Oshodin

Cards (29)

What is Power Transmission?
The transfer of energy from its source, such as a motor, to another part of a system where it is used to perform useful work, like turning a gear, cam, or other mechanical component.
What is the DRIVER Gear?
The driver gear is the gear that receives the input energy and drives the rest of the system. It is usually connected to a motor or crank.
What is the DRIVEN Gear?
The driven gear is the gear that receives output motion and is turned by the driver gear.
What is the Role of a Driver Gear in a Gear system?
It provides the input motion or force to drive the system.
What is the Role of a Driven Gear in a Gear system?
It receives motion or force from the driver gear and produces the output.
How does energy move between the driver and driven gear?
The teeth of the driver gear mesh with those of the driven gear, transferring motion and force.
What is an Idler Gear?
An idler gear is a gear placed between the driver and driven gears to make them rotate in the same direction.
Why is an Idler gear used in a gear system?
To change the direction of the output gear so it rotates the same way as the input gear.
Why is an Idler gear used in a gear system?
To change the direction of the output gear so it rotates the same way as the input gear.
Does an idler gear affect the speed ratio of the gear train?
No, it only affects the direction of rotation, not the speed ratio.
Where is the idler gear placed in a gear system?
Between the driver gear and the driven gear.
What effect does an idler gear have on output direction?
It reverses the direction once more, so the driver and driven gears turn in the same direction.
What type of motion do spur gears transmit?
They transmit rotary motion from the driver gear to the driven gear.
On What type of shafts are spur gears mounted?
Spur gears are mounted on parallel shafts.
What is a Spur Gear used for?
To transfer rotary motion and force between gears that are close together and aligned.
What do Sprocket and chain systems transmit?
They transmit rotary motion from one gear (sprocket) to another over a distance.
How many sprockets are needed to transfer motion using a chain?
Only two sprockets are needed—one driver and one driven.
Why would a chain and sprocket system be used instead of spur gears?
Because it can transmit motion over a greater distance with fewer parts.
How is motion transmitted in a sprocket and chain system?
The chain links mesh with the teeth of the sprockets to transfer motion and force.
What are Spur gears?
Spur gears are toothed wheels mounted on parallel shafts that transmit rotary motion from a driver gear to a driven gear.
What is a Sprocket and Chain? 
A system that uses toothed wheels (sprockets) connected by a chain to transfer rotary motion from one shaft to another over a distance.
What is the Formula for Calculating Velocity Ratio (VR) In gears?
$VR\ =$ $\frac{Number\ of\ teeth\ on\ driven\ gear}{Number\ of\ teeth\ on\ driver\ gear}$
What is meant by velocity ratio (VR) in a gear system?
It is the ratio of how many times the driver gear turns compared to the driven gear — it shows the difference in speed between them.
What happens when the driven gear is larger than the driver gear?
It creates a slowing down system — the output is slower than the input.
What happens when the driver gear is larger than the driven gear?
It creates a speeding up system — the output is faster than the input.
In a gear system with a driver gear of 20 teeth and a driven gear of 40 teeth, what is the velocity ratio?
VR = 40 ÷ 20 = 2 : 1
If a driven gear has 20 teeth and a driver gear has 40 teeth, what is the velocity ratio?
VR = 20 ÷ 40 = 1 : 2
If a gear system has a velocity ratio of 2:1 and the input speed is 400 rpm, what is the output speed?
The output is 2 times slower: 200 rpm
If the velocity ratio is 1:2 and the input speed is 300 rpm, what is the output speed?
The output is 2 times faster: 600 rpm