Knowledge of Gears and Gear Transmission in a Mechanical Design!
Knowledge

Knowledge of Gears and Gear Transmission in a Mechanical Design!

Gears are mechanical parts with teeth that mesh with each other to transmit motion and power in mechanical equipment. Because the ratio of transmission in gears is set, their perfect accuracy makes them ideal for precision machinery.
Published: Jun 23, 2022
Knowledge of Gears and Gear Transmission in a Mechanical Design!

What is A Gear?

Gears are mechanical parts with teeth that mesh with each other to transmit motion and power in mechanical applications. Of all mechanical transmission applications, gear transmission is the most widely used.

There are many kinds of gears, and the most common classification method is according to the gear shaft. Generally, gears are divided into three categories: parallel axis, intersecting axis, and staggered axis.

Parallel Axis Gears

These include spur gears, helical gears, internal gears, racks and helical racks, etc.

Intersecting Axis Gears

These include straight bevel gears, spiral bevel gears, zero-degree bevel gears, etc.

Staggered Axis Gears

These include staggered shaft helical gears, worm gears, hypoid gears, etc.

What is Gear Transmission?

Gear transmission is the mechanism of using toothed wheels that mesh in various arrangements to change direction and speeds of rotating mechanical operations. In gear transmission one gear acts as the drive or driving gear and the other one as the driven gear.

Features of Gear Transmission

Efficient

Among the commonly used methods for transmission of mechanical force, gear transmission has the highest efficiency. Transmission efficiency is usually 96%~99%, making it highly suitable and economical for heavy mechanical applications.

Compact

The space size required for gear interfaces is small.

Stable Transmission

Transmission of force through gears is very stable, so gear transmission is widely used for many mechanical applications.

Reliable Performance and Long Life

When gear transmissions are designed, manufactured, and maintained correctly, they have a very reliable service life and can be used as long as ten or twenty years. This is especially important for vehicles and machines that operate continuously for long periods of time such as in mines. However, the manufacturing costs and precision required for gear transmission are relatively high, and they are not suitable for applications where the transmission distance is too far.

Classifications of Gear

Gear types can be divided according to their method of force transmission. The method of force transmission of cylindrical gears, bevel gears, rack gears, and worm gears differs according to the shape of the gear.

Cylindrical Gears

Cylindrical gears transmit motion and power between parallel shafts. Cylindrical gears can be divided into three types according to the relative relationship between the gear teeth and the gear axis. Cylindrical gears types include: spur gears, helical gears, and herringbone gears.

The teeth of spur gears are parallel to the axis, so the contact line of the tooth surface is a straight line. During meshing, the entire tooth width enters and exits meshing at the same time, so the force is suddenly added or removed. This causes poor transmission stability and sometimes loud noise from the impact during meshing.

Helical gears are similar to spur gears except that their teeth are cut at an angle to the axis. During meshing, the initial contact point sweeps across the length of the tooth as it turns, making a smoother transmission of force. One consequence of the offset angle is the production of a side thrust on the axis.

Herringbone gears, like helical gears, have teeth set at an angle to the axis, but instead of a single set of teeth with the angle in one direction, there is a pair of parallel gears with teeth angled equally and opposite to each other. The parallel rows of teeth counterbalance each other’s side thrust, so that herringbone gears will not have a side thrust.

The transmission power and speed of cylindrical gear makes them suitable for a wide range of applications. Power can be from as small as one thousandth of a horsepower, to as high as 100,000 horsepower, with speeds as high as 300 meters per second.

Bevel Gears

Bevel gears transmit force between intersecting shafts which are set at an angle to each other. Bevel gears can have teeth which are straight beveled, similar to spur gears, or have spiral beveled teeth similar to helical gears. Both straight bevel and spiral bevel gears are widely used.

Rack Gears

Rack gears convert rotational motion into linear motion. A cylindrical gear (called a pinion) meshes with a straight linear gear, (called a rack) to apply force in a straight line. Rack and pinion gears use both straight and helical gears, but side force created by helical gears can create problems leading to premature wear, so straight, spur gears are more commonly used.

Worm Gears

A worm gear is a gear consisting of a shaft with a spiral thread called the worm, similar to the threads of a bolt or screw, that meshes with the teeth of a toothed gear. As the worm is rotated, it pulls (or pushes) the toothed gear, similar to the way a bolt or screw pulls its way into the material it is holding together. A common application of a worm gear is the adjustment knobs on musical stringed instruments.

Published by Jun 23, 2022 Source :read01

Further reading

You might also be interested in ...

Headline
Knowledge
Precision in Rotation: Indexing Plates in Metal Machining
Rotary Indexing Plates are precision components of milling machines that facilitate the precise angular positioning of workpieces and cutting tools. They are used in both metal machining and woodworking, and while they share a fundamental purpose, there are notable differences in their design, capabilities, and applications due to the distinct characteristics of the materials and processes involved.
Headline
Knowledge
Sheet Metal Fabrication Machines: An Overview
Sheet metal machines are widely used in various manufacturing industries for shaping, cutting, and forming sheet metal into different components. Some of the industries that extensively utilize sheet metal machines include light industries such as electrical and medical equipment, all the way up to heavy industries such as automotive, rail, oil and gas, as well as wind power generation.
Headline
Knowledge
The Significance of Planing Machines in the Machining Tool Industry
Metal and wood planing machines are essential tools in the machining industry. Wood planers use a rotating cutterhead equipped with sharp blades to smooth and size workpieces, ensuring uniformity in woodworking projects. Metal planers use a cutting tool mounted on a reciprocating tool head to remove excess material from metal surfaces, achieving precise dimensions in components. Both types of planning machines enhance efficiency, precision, and the overall quality of finished products. Understanding the key features of the various types of planing machines will help you choose the right machine best suited for your machining needs.
Headline
Knowledge
Stamp Press Technology and Manufacturing in Taiwan
Nestled in the heart of East Asia, Taiwan has emerged as a powerhouse in the global stamp press industry, with a robust manufacturing ecosystem, and cutting-edge technology. With a rich manufacturing tradition and a focus on precision engineering, Taiwanese companies meet the demands of diverse sectors, ranging from electronics and automotive to medical devices and aerospace, supplying high-quality stamp press solutions to a diverse range of markets worldwide.
Headline
Knowledge
Introduction to Stamp Press Technology
Stamp press technology, also known as stamping or pressing, is a manufacturing process that utilizes a press to shape or cut materials into desired forms. This process involves the use of a die and a punch to form or cut the material, creating intricate shapes with high precision. Widely employed for mass production due to its speed, accuracy, and repeatability, this process is a crucial part of modern manufacturing.
Headline
Knowledge
Mechanical Reducers in Industrial Manufacturing
Speed reducers are powerful mechanical devices generally used in machining tools to multiply the force or torque generated by an input power source, thereby increasing the usable force, enhancing the performance and precision of the machining tool. They are also used in material handling systems such as conveyor belts and lifting mechanisms to control the speed of material transfer and manage heavy loads efficiently. By multiplying the available output force, they enable the use of a reduced input power source, resulting in cost savings for machine tool investments. When choosing the appropriate speed reducer, the torque, speed, and horsepower of the input, as well as the mounting configuration, efficiency, and required lifetime all need to be considered. The quality of the machine chosen will also be reflected in the amount of backlash, transmission error, torsional rigidity, and inertia experienced during machining.
Headline
Knowledge
Introduction to Stamp Press Technology
Stamp press technology, also known as stamping or pressing, is a manufacturing process that utilizes a press to shape or cut materials into desired forms. This process involves the use of a die and a punch to form or cut the material, creating intricate shapes with high precision. Widely employed for mass production due to its speed, accuracy, and repeatability, this process is a crucial part of modern manufacturing.
Headline
Knowledge
Innovations in Sawing Technology
The traditional image of saws as just cutting tools is being reshaped by cutting-edge advancements that integrate automation and robotics in sawing technologies, paving the way for greater precision and efficiency of sawing technology in manufacturing.
Headline
Knowledge
The Fundamentals of Drilling Machines
Drilling machines play a pivotal role in the manufacturing industry, using rotary motion to create precise holes in a variety of materials. Whether it's metal, wood, plastic, or composites, drilling machines are versatile and essential for producing components in countless applications.
Headline
Knowledge
Hybrid Milling in Manufacturing: Integrating Additive and Subtractive Processes
The integration of additive manufacturing (AM) and subtractive milling processes has emerged as a transformative manufacturing process known as hybrid milling. This technique combines the strengths of both 3D printing and traditional subtractive milling, opening up new possibilities and diverse applications for creating complex geometries with improved material efficiency.
Headline
Knowledge
Features and Mechanics of Industrial Saws
Industrial saws shape raw materials into precise components that form the backbone of countless products. Understanding the mechanics of sawing, examining the fundamental principles, cutting mechanisms, and essential aspects of safety and maintenance will ensure the most efficient and safe operation of industrial saws.
Headline
Knowledge
Understanding the Diversity of Industrial Saws
Industrial saws play a pivotal role in processing a wide range of materials with precision and efficiency. Taiwan is a major supplier of industrial saws to the automotive, aerospace, and construction, as well as the metal fabrication industries. This article aims to provide a comprehensive understanding of the diverse industry of industrial saws, exploring their types, structures, applications, and the crucial role they play in various industries.
Agree