Gear train design with idler gear

In summary, to construct a gear train with a driver gear of 15 teeth and a driven gear that can pull up a weight of 18kN with a velocity of 0.7-1.3 m/s, we need at least three idler gears with a ratio of 3.24. The idler gears should have a radius of 100mm and be spaced at least 500mm apart from each other.
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Homework Statement


Construct a gear train using at least three idler gears of any tooth size.the driver gear had 15 teeth,Pd of 16 n 4625rpm clockwise.driven gear must able to pull up a weight 18kN with velocity 0.7-1.3 m/s. The gear is made of small n large gear,connected together.the smaller is having 20 teeth n Pd of 15.bigger has radius of 100mm. The distance between driver m driven must b less than 1000mm.


Homework Equations




Gear ratio=n1/n2

The Attempt at a Solution


gear ratio=20/15
= 1.8
 
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To determine the size of the idler gears, multiply the driver and driven gear ratios together. 1.8 x 1.8 = 3.24 Thus, we need three idler gears with a ratio of 3.24. The radius of the idler gears should be approximately equal to the radius of the larger driven gear (100mm). The distance between the driver and driven gears should be less than 1000mm. Therefore, the idler gears should be spaced at least 500mm apart.
 

1. What is a gear train design with idler gear?

A gear train with idler gear is a type of mechanism that uses two or more gears to transmit power and motion between two parallel axes. An idler gear is an additional gear that is placed between the driving and driven gears, and it rotates in the opposite direction to the driving gear. This design allows for a change in the speed, direction, or torque of the output shaft.

2. What are the advantages of using an idler gear in gear train design?

The use of an idler gear in gear train design offers several advantages. It allows for the transmission of power and motion between non-parallel axes, provides a neutral or idling position for the gears, and reduces the strain on the driving gear by evenly distributing the load. Additionally, it can change the direction of rotation, increase or decrease the speed, and maintain a constant velocity ratio.

3. How do you calculate the gear ratio in a gear train design with idler gear?

The gear ratio in a gear train design with idler gear is calculated by dividing the number of teeth on the driven gear by the number of teeth on the driving gear. This ratio remains the same for all the gears in the train, including the idler gear. For example, if the driving gear has 20 teeth and the driven gear has 40 teeth, the gear ratio would be 40/20 or 2:1.

4. What factors should be considered when designing a gear train with idler gear?

When designing a gear train with idler gear, several factors must be considered. These include the speed and torque requirements, the desired gear ratio, the direction of rotation, the space limitations, and the type of load that the gears will be subjected to. Additionally, the material and manufacturing method of the gears should be carefully chosen to ensure durability and efficiency.

5. Can idler gears be used in all types of gear train designs?

While idler gears can significantly enhance the functionality of a gear train, they may not be suitable for all types of designs. For instance, they are not recommended for high-speed or high-torque applications, as they can introduce additional friction and wear on the gears. Moreover, they may not be necessary if the driving and driven gears are already parallel and can achieve the desired gear ratio without an idler gear.

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