Uses of Spur Gears. The most common type of gear is the spur gear. These gears have straight teeth and must be mounted on parallel shafts for their teeth to mesh with those of other gears. For this reason, spur gears are known as slow speed gears.
What is a rack and pinion gear used for?
Rack and pinion gears are used to convert rotation into linear motion. A perfect example of this is the steering system on many cars. The steering wheel rotates a gear which engages the rack. As the gear turns, it slides the rack either to the right or left, depending on which way you turn the wheel.
What are gears and what are they used for?
Many are machines we use in our everyday life, such as cars; wind up toys, clocks, mixers, bikes, oil rigs, vacuum etc. Gears make our lives easier in many ways. They allow us to change direction and speed of movement, measure time and create a great force “mechanical output” with a little force input.
What is the pinion gear?
A pinion is a round gear used in several applications: In many cases, such as remote controlled toys, the pinion is also the drive gear. the smaller gear that drives in a 90-degree angle towards a crown gear in a differential drive.
What is the pitch of the gear?
Diametral pitch P: The number of teeth of a gear per inch of its pitch diameter. A toothed gear must have an integral number of teeth. The circular pitch, therefore, equals the pitch circumference divided by the number of teeth. The diametral pitch is, by definition, the number of teeth divided by the pitch diameter.
How does rack and pinion steering provide excellent feedback and precise control?
The pinion gear is attached to the steering shaft. The rack-and-pinion gearset does two things: It converts the rotational motion of the steering wheel into the linear motion needed to turn the wheels. It provides a gear reduction, making it easier to turn the wheels.
What is a crown gear definition?
A crown gear (or a contrate gear) is a gear which has teeth that project at right angles to the face of the wheel. In particular, a crown gear is a type of bevel gear where the pitch cone angle is 90 degrees. A pitch cone of any other angle is simply called a bevel gear.
What is the gear reduction?
Gear Reduction. The rotary machine’s output torque is increased by multiplying the torque by the gear ratio, less some efficiency losses. While in many applications gear reduction reduces speed and increases torque, in other applications gear reduction is used to increase speed and reduce torque.
What is the purpose of the idler gear?
An idler gear is a gear wheel that is inserted between two or more other gear wheels. The purpose of an idler gear can be two-fold. Firstly, the idler gear will change the direction of rotation of the output shaft.
What does a 4.10 gear ratio mean?
When you hear people refer to numbers like 3.08, 3.73, or 4.10, they’re talking about the ratio of the ring-and-pinion gears in the rear axle—hence, the numbers are more accurately 3.08:1, 3.73:1, or 4.10:1. That also means that for every one turn of the ring gear, the pinion will turn 4.11 times.
Is it better to have a higher or lower gear ratio?
The lower the number, the faster the car will go with the same number of engine revolutions. The higher the number the better the car will accelerate, but at the expense of high speed cruising. Now for the confusing part of the story. A high numerical gear ratio is called a low gear or low rear end, and vice versa.
What does it mean to have 3.73 gears?
A 3.73 gear ratio means the drive shaft will rotate 3 . 73 times for every one revolution of the wheel. The step up or down in gear ratios may seem incremental but the difference is noticeable when driving and at the fuel pump. In basic terms, a lower gear ratio coincides with a lower RPM while driving at speed.
What does transmission gear ratio mean?
In simple terms, the numbers mean how many turns of the drive shaft to one turn of the rear wheel. If you are cruising down the freeway at 60 MPH with 3.00 gears, in a typical high gear with a 1:1 output ratio, it simply means that the drive shaft (engine) is spinning 3 times for every 1 rotation of your tire.
What is a good diff ratio?
Differential Gear Ratio determines the number of times the drive shaft (or pinion) will rotate for each turn of the wheels (or ring gear). So if you have a 3.73:1 gear ratio the drive shaft turns 3.73 times for every turn of the wheel.
What is the final gear ratio?
It is the ratio of the driveshaft (or transmission output shaft) to rear wheel revolutions. 3.5 revolutions of the driveshaft for each revolution of the wheel = 3.5:1 final drive ratio. Gear Ratio: The Gear Ratio is defined as the input speed relative to the output speed. It is.
What is the axle ratio?
Usually a whole number and decimal fraction, the drive-axle ratio is a comparison of the number of gear teeth on the ring gear of the rear axle and the pinion gear on the driveshaft. For example, a 4.11:1 ratio means there are 4.11 teeth on the axle’s ring gear for each tooth on the driveshaft’s pinion gear.
How do you figure out the gear ratio?
Start with a two-gear train. To be able to determine a gear ratio, you must have at least two gears engaged with each other — this is called a “gear train.”
Count the number of teeth on the drive gear.
Count the number of teeth on the driven gear.
Divide one teeth count by the other.
What is gear ratio in trucks?
Automakers build trucks with a range of optional axle ratios. The key to understanding gear ratios is to remember that, as the numerical ratio goes up, towing capacity increases but fuel economy goes down. So a truck with optional 3.73 gears, for example, will tow a heavier trailer than one with 3.55 or 3.21.
What is an anti spin differential rear axle?
The anti spin rear axle is similar to the limited slip axle. If one of the rear wheels starts to loose traction, the other rear wheel will engage and keep the truck moving (if that side has traction). It doesn’t create a bind in the axle as much as a “locked” axle, which helps going around sharp corners.