epicyclic gearbox

In an epicyclic or planetary gear train, several spur gears distributed evenly around the circumference operate between a gear with internal teeth and a gear with exterior teeth on a concentric orbit. The circulation of the spur equipment takes place in analogy to the orbiting of the planets in the solar system. This is how planetary gears acquired their name.
The parts of a planetary gear train can be divided into four main constituents.
The housing with integrated internal teeth is known as a ring gear. In nearly all cases the housing is fixed. The driving sun pinion is definitely in the center of the ring gear, and is coaxially arranged with regards to the output. The sun pinion is usually mounted on a clamping system to be able to provide the mechanical connection to the engine shaft. During operation, the planetary gears, which are mounted on a planetary carrier, roll between your sunlight pinion and the ring gear. The planetary carrier also represents the output shaft of the gearbox.
The sole purpose of the planetary gears is to transfer the mandatory torque. The amount of teeth has no effect on the tranny ratio of the gearbox. The amount of planets may also vary. As the number of planetary gears raises, the distribution of the strain increases and therefore the torque that can be transmitted. Increasing the amount of tooth engagements also decreases the rolling power. Since just area of the total result needs to be transmitted as rolling power, a planetary equipment is extremely efficient. The advantage of a planetary gear compared to an individual spur gear is based on this load distribution. It is therefore feasible to transmit high torques wit
h high efficiency with a compact style using planetary gears.
Provided that the ring gear includes a continuous size, different ratios can be realized by varying the number of teeth of sunlight gear and the amount of tooth of the planetary gears. Small the sun equipment, the greater the ratio. Technically, a meaningful ratio range for a planetary stage is usually approx. 3:1 to 10:1, since the planetary gears and sunlight gear are extremely little above and below these ratios. Higher ratios can be obtained by connecting a number of planetary phases in series in the same band gear. In this instance, we talk about multi-stage gearboxes.
With planetary gearboxes the speeds and torques could be overlaid by having a ring gear that’s not set but is driven in virtually any direction of rotation. Additionally it is possible to repair the drive shaft to be able to grab the torque via the ring equipment. Planetary gearboxes have grown to be extremely important in many areas of mechanical engineering.
They have grown to be particularly well established in areas where high output levels and fast speeds must be transmitted with favorable mass inertia ratio adaptation. High tranny ratios can also easily be performed with planetary gearboxes. Because of their positive properties and compact design, the gearboxes possess many potential uses in commercial applications.
The benefits of planetary gearboxes:
Coaxial arrangement of input shaft and output shaft
Load distribution to many planetary gears
High efficiency because of low rolling power
Nearly unlimited transmission ratio options due to mixture of several planet stages
Suitable as planetary switching gear due to fixing this or that part of the gearbox
Possibility of use as overriding gearbox
Favorable volume output
Suitability for a wide variety of applications
Epicyclic gearbox can be an automatic type gearbox in which parallel shafts and gears arrangement from manual gear box are replaced with an increase of compact and more reliable sun and planetary type of gears arrangement and also the manual clutch from manual power teach is replaced with hydro coupled clutch or torque convertor which in turn made the transmission automatic.
The idea of epicyclic gear box is extracted from the solar system which is known as to an ideal arrangement of objects.
The epicyclic gearbox usually includes the P N R D S (Parking, Neutral, Reverse, Drive, Sport) settings which is obtained by fixing of sun and planetary gears based on the require of the drive.
Ever-Power Planetary Gear Motors are an inline remedy providing high torque in low speeds. Our Planetary Gear Motors provide a high efficiency and offer excellent torque output in comparison with other types of equipment motors. They can handle a different load with minimal backlash and are best for intermittent duty procedure. With endless decrease ratio options, voltages, and sizes, Ever-Power Products includes a fully tailored equipment motor solution for you.
A Planetary Gear Engine from Ever-Power Items features one of our numerous kinds of DC motors coupled with one of our uniquely designed epicyclic or planetary gearheads. A planetary gearhead includes an internal gear (sun equipment) that drives multiple external gears (planet gears) producing torque. Multiple contact factors over the planetary gear train permits higher torque generation in comparison to among our spur gear motors. In turn, an Ever-Power planetary equipment motor has the ability to handle numerous load requirements; the more gear stages (stacks), the higher the load distribution and torque transmitting.
Features and Benefits
High Torque Capabilities
Sleek Inline Design
High Efficiency
Ability to Handle Large Reduction Ratios
High Power Density
Applications
Our Planetary Equipment Motors deliver exceptional torque output and effectiveness in a concise, low noise style. These characteristics in addition to our value-added capabilities makes Ever-Power s gear motors a great choice for all movement control applications.
Robotics
Industrial Automation
Dental Chairs
Rotary Tables
Pool Chair Lifts
Exam Room Tables
Massage Chairs
Packaging Eqipment
Labeling Eqipment
Laser Cutting Machines
Industrial Textile Machinery
Conveying Systems
Test & Measurement Equipment
Automated Guided Automobiles (AGV)
In an epicyclic or planetary gear train, several spur gears distributed evenly around the circumference run between a gear with internal teeth and a gear with external teeth on a concentric orbit. The circulation of the spur gear takes place in analogy to the orbiting of the planets in the solar system. This is one way planetary gears obtained their name.
The components of a planetary gear train could be split into four main constituents.
The housing with integrated internal teeth is actually a ring gear. In the majority of cases the housing is fixed. The driving sun pinion is in the heart of the ring equipment, and is coaxially organized in relation to the output. The sun pinion is usually attached to a clamping system to be able to provide the mechanical connection to the engine shaft. During operation, the planetary gears, which are mounted on a planetary carrier, roll between the sunlight pinion and the band gear. The planetary carrier also represents the output shaft of the gearbox.
The sole reason for the planetary gears is to transfer the required torque. The amount of teeth has no effect on the transmitting ratio of the gearbox. The number of planets may also vary. As the number of planetary gears raises, the distribution of the load increases and then the torque that can be transmitted. Raising the number of tooth engagements also decreases the rolling power. Since just area of the total result has to be transmitted as rolling power, a planetary gear is incredibly efficient. The benefit of a planetary equipment compared to a single spur gear lies in this load distribution. Hence, it is feasible to transmit high torques wit
h high efficiency with a compact design using planetary gears.
So long as the ring gear includes a continuous size, different ratios can be realized by varying the number of teeth of the sun gear and the number of teeth of the planetary gears. The smaller the sun gear, the higher the ratio. Technically, a meaningful ratio range for a planetary stage is approx. 3:1 to 10:1, since the planetary gears and the sun gear are extremely small above and below these ratios. Higher ratios can be obtained by connecting several planetary levels in series in the same ring gear. In cases like this, we talk about multi-stage gearboxes.
With planetary gearboxes the speeds and torques can be overlaid by having a ring gear that’s not fixed but is driven in any direction of rotation. Additionally it is possible to repair the drive shaft in order to pick up the torque via the ring gear. Planetary gearboxes have grown to be extremely important in lots of areas of mechanical engineering.
They have grown to be particularly more developed in areas where high output levels and fast speeds should be transmitted with favorable mass inertia ratio adaptation. High transmission ratios can also easily be performed with planetary gearboxes. Because of their positive properties and compact design, the gearboxes have many potential uses in commercial applications.
The benefits of planetary gearboxes:
Coaxial arrangement of input shaft and output shaft
Load distribution to many planetary gears
High efficiency because of low rolling power
Nearly unlimited transmission ratio options because of mixture of several planet stages
Suitable as planetary switching gear due to fixing this or that section of the gearbox
Chance for use as overriding gearbox
Favorable volume output
On the surface, it could seem that gears are being “reduced” in quantity or size, which is partially true. Whenever a rotary machine such as an engine or electrical motor needs the output speed decreased and/or torque improved, gears are commonly used to accomplish the desired result. Gear “reduction” specifically refers to the swiftness of the rotary machine; the rotational acceleration of the rotary machine can be “decreased” by dividing it by a equipment ratio greater than 1:1. A gear ratio greater than 1:1 is definitely achieved whenever a smaller equipment (reduced size) with fewer quantity of tooth meshes and drives a more substantial gear with greater quantity of teeth.
Gear reduction gets the opposite influence on torque. The rotary machine’s output torque is improved by multiplying the torque by the apparatus ratio, less some effectiveness losses.
While in lots of applications gear decrease reduces speed and boosts torque, in various other applications gear reduction is used to improve swiftness and reduce torque. Generators in wind turbines use gear reduction in this fashion to convert a relatively slow turbine blade rate to a higher speed capable of generating electricity. These applications make use of gearboxes that are assembled reverse of those in applications that decrease swiftness and increase torque.
How is gear decrease achieved? Many reducer types can handle attaining gear decrease including, but not limited by, parallel shaft, planetary and right-angle worm gearboxes. In parallel shaft gearboxes (or reducers), a pinion equipment with a certain number of teeth meshes and drives a larger gear with a greater number of teeth. The “reduction” or equipment ratio is calculated by dividing the number of tooth on the large equipment by the number of teeth on the small gear. For example, if a power motor drives a 13-tooth pinion gear that meshes with a 65-tooth gear, a reduction of 5:1 is achieved (65 / 13 = 5). If the electrical motor speed is certainly 3,450 rpm, the gearbox reduces this quickness by five situations to 690 rpm. If the motor torque can be 10 lb-in, the gearbox boosts this torque by one factor of five to 50 lb-in (before subtracting out gearbox efficiency losses).
Parallel shaft gearboxes often contain multiple gear models thereby increasing the apparatus reduction. The full total gear decrease (ratio) depends upon multiplying each individual gear ratio from each equipment arranged stage. If a gearbox contains 3:1, 4:1 and 5:1 gear pieces, the full total ratio is 60:1 (3 x 4 x 5 = 60). In our example above, the 3,450 rpm electric electric motor would have its quickness reduced to 57.5 rpm by using a 60:1 gearbox. The 10 lb-in electric electric motor torque would be increased to 600 lb-in (before performance losses).
If a pinion gear and its mating gear have the same quantity of teeth, no reduction occurs and the apparatus ratio is 1:1. The apparatus is named an idler and its own principal function is to change the path of rotation instead of reduce the speed or increase the torque.
Calculating the gear ratio in a planetary equipment reducer is less intuitive as it is dependent on the number of teeth of the sun and band gears. The planet gears become idlers and do not affect the gear ratio. The planetary equipment ratio equals the sum of the amount of teeth on the sun and ring gear divided by the number of teeth on the sun gear. For instance, a planetary established with a 12-tooth sun gear and 72-tooth ring gear has a gear ratio of 7:1 ([12 + 72]/12 = 7). Planetary gear units can achieve ratios from about 3:1 to about 11:1. If more gear reduction is needed, additional planetary stages may be used.
The gear decrease in a right-angle worm drive is dependent on the amount of threads or “starts” on the worm and the amount of teeth on the mating worm wheel. If the worm has two begins and the mating worm wheel has 50 teeth, the resulting gear ratio is 25:1 (50 / 2 = 25).
When a rotary machine such as for example an engine or electric electric motor cannot supply the desired output rate or torque, a gear reducer may provide a good solution. Parallel shaft, planetary, right-position worm drives are common gearbox types for achieving gear reduction. Contact Groschopp today with all your gear reduction questions.