Ring Gears

Internal gears, or ring gears, share the same standards as external gears, but with teeth cut on the inside diameter, leaving the outer surface smooth. They offer a compact solution for achieving significant speed reduction and minimizing sliding wear, which extends their lifespan. When two parallel shafts need to rotate in the same direction, internal gears remove the need for an idler gear. These gears are versatile and can be used in various types of equipment and applications.

Ring Gear for Sale

A ring gear is a widely used type of gear in automobiles, serving to transmit torque across the vehicle. There are various methods for achieving this, but today, ring and pinion gears are the most commonly used in the automotive industry. They are known for their strength, quieter operation, and suitability for higher reduction ratios.

Advantages of Internal Gears

Spur and helical gears have a unique feature of being manufactured in an internal form, allowing them to mesh with standard external gears. This design adds significant flexibility to the creation of planetary gear systems and various instrument setups, enhancing their versatility.

The benefits of internal gears include their suitability for compact designs, as they require a smaller center distance compared to external gears. They also offer a higher contact ratio and improved surface durability due to the convex profile interacting with the concave surface.

Where Are Ring Gears Used?

Ring gears are essential components in various mechanical systems, transmitting torque and power to other parts. For example, in automobiles, the drive shaft rotates the ring gear, which turns the drive axle and wheels. The larger the ratio between the ring gear and pinion, the greater the torque and power generated, making it critical for performance in many applications.

Different types of ring gears have unique properties and are crafted from various materials. A typical ring gear set can achieve different ratios in a single revolution, while a partial gear set may have varying teeth for each revolution. Key considerations like reduction ratio and design must be evaluated before choosing a ring gear for a specific use.

Ring gears are made from materials such as steel and aluminum, and manufacturers often use advanced CAD/CAM technology to customize these gears. They can be forged into various shapes and sizes, with some versions made from stainless steel, plastic, or Delrin, depending on the application’s needs. Their flexibility in design and material makes them ideal for a wide range of industries.

Applications of Internal GearsRollers

  • Electric Screwdrivers
  • Pumps
  • Positioning Equipment
  • Automotives
  • Bicycle components
  • Planetary gear drives

Function of the Ring Gear

The ring gear is a crucial component of the differential, responsible for transmitting torque from the axle to the wheels. It consists of several interconnected parts, the most prominent being the gear itself and the pinion. The pinion’s teeth mesh with those of the ring gear, enabling the smooth transfer of motion and power.

The pinion’s offset determines how closely its teeth will align with the ring gear’s center axis. If the pinion is too tight or loose, it can lead to backlash, where sliding friction occurs, causing heat buildup and gear wear. Proper alignment is vital to avoid excessive heat and mechanical issues.

During manufacturing, the ring gear starts as a billet or forged piece, undergoing processes to achieve a hard outer surface and softer inner core. This final treatment is essential for durability. In automotive systems, the ring gear is located at the front of the differential case and is sometimes referred to as the hypoid gear due to its design derived from the hyperboloid shape.

How Are Internal Gears Manufactured?

Internal gears are manufactured using a pinion cutter and a shaping process. While external gears are typically shaped through hobbing, milling, or shaping with a rack cutter, other methods like punching, etching, or laser engraving can also be used in certain cases, depending on the specific requirements.

The first step in the process is selecting the appropriate material for the gear teeth, which may include steel, aluminum, plastic, or wood. Each material has unique properties that make it better suited for different applications, with factors like durability, cost, and application needs influencing the choice.

Once the material is chosen, the gear teeth are cut using a gear-cutting machine. The depth of the cuts determines the number of teeth, and leftover waste material, known as “dross,” is removed from the surface. After the cutting, the gears are polished, often by hand, to smooth out imperfections and ensure they are ready for operation.

Selection Hints

Please select the most suitable products by carefully considering the characteristics of items and contents of the product tables. It is also important to read all applicable notes before the final selection.

Caution in Selecting Mating Gears
HZPT stock internal gears can mate with any spur gears of the same module, however, there are cases of involute, trochoid and trimming interference occurrences, depending on the number of teeth of the mating gear. Various types of interference and their symptoms and causes are tabulated below, also shown, the number of teeth of allowable mating pinions.

Interferences and the Symptoms

TYPE SYMPTOMS CAUSES
Involute interference The tip of the internal gear digs into the root of the pinion. Too few teeth on the pinion.
Trochoid interference The exiting pinion tooth contacts the internal gear tooth. Too little difference in number of teeth of the two gears.
Trimming interference Pinion can slide in or out axially but cannot move radially. Too little difference in number of teeth of the two gears.

 

 

 

As a professional ring gear manufacturer in China, Ever-power can provide a wide range of high-quality China internal gears. Additionally, custom ring gears are available. Apart from large and small ring gears, we also offer planetary gears, worm gearsbevel gears etc. Contact us now to get more info!

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