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 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 program. This is how planetary gears acquired their name.
The components of a planetary gear train can be split into four main constituents.
The housing with integrated internal teeth is actually a ring gear. In nearly all cases the casing is fixed. The generating sun pinion is definitely in the heart of the ring equipment, and is coaxially arranged with regards to the output. Sunlight pinion is usually mounted on a clamping system to be able to offer the mechanical link with the motor shaft. During procedure, 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 result shaft of the gearbox.
The sole reason for the planetary gears is to transfer the required torque. The number of teeth does not have any effect on the transmitting ratio of the gearbox. The number of planets can also vary. As the amount of planetary gears increases, 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 only area of the total result needs to be transmitted as rolling power, a planetary gear is incredibly efficient. The advantage of a planetary equipment compared to a single spur gear lies in this load distribution. It is therefore possible to transmit high torques wit
h high efficiency with a concise design using planetary gears.
Provided that the ring gear has a constant size, different ratios could be realized by various the number of teeth of the sun gear and the number of teeth of the planetary gears. The smaller the sun equipment, the greater the ratio. Technically, a meaningful ratio range for a planetary stage is approx. 3:1 to 10:1, because the planetary gears and sunlight gear are extremely little above and below these ratios. Higher ratios can be obtained by connecting many planetary levels in series in the same ring 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 fixed but is driven in virtually any direction of rotation. It is also possible to repair the drive shaft in order to pick up the torque via the ring equipment. Planetary gearboxes have become extremely important in many regions of mechanical engineering.
They have become particularly well established in areas where high output levels and fast speeds must be transmitted with favorable mass inertia ratio adaptation. High transmission ratios may also easily be performed with planetary gearboxes. Because of their positive properties and compact design, the gearboxes possess many potential uses in industrial applications.
The benefits of planetary gearboxes:
Coaxial arrangement of input shaft and output shaft
Load distribution to several planetary gears
High efficiency because of low rolling power
Almost unlimited transmission ratio options due to combination of several planet stages
Ideal as planetary switching gear because of 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 is an automatic type gearbox where parallel shafts and gears set up from manual equipment box are replaced with an increase of compact and more reliable sun and planetary type of gears arrangement as well as the manual clutch from manual power teach can be replaced with hydro coupled clutch or torque convertor which in turn produced the transmission automatic.
The idea of epicyclic gear box is extracted from the solar system which is considered to the perfect arrangement of objects.
The epicyclic gearbox usually includes the P N R D S (Parking, Neutral, Invert, Drive, Sport) settings which is obtained by fixing of sun and planetary gears according to the need of the drive.
Ever-Power Planetary Gear Motors are an inline answer providing high torque at low speeds. Our Planetary Gear Motors offer a high efficiency and offer excellent torque output when compared to other types of equipment motors. They can handle a various load with minimal backlash and are best for intermittent duty operation. With endless reduction ratio choices, voltages, and sizes, Ever-Power Products has a fully tailored equipment motor remedy for you.
A Planetary Gear Engine from Ever-Power Products features among our various types of DC motors coupled with one of our uniquely designed epicyclic or planetary gearheads. A planetary gearhead contains an internal gear (sun gear) that drives multiple outer gears (planet gears) producing torque. Multiple contact points over the planetary gear train allows for higher torque generation in comparison to one of our spur gear motors. In turn, an Ever-Power planetary equipment motor has the ability to handle various load requirements; the more gear stages (stacks), the bigger 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 result and performance in a compact, low noise design. These characteristics in addition to our value-added features makes Ever-Power s equipment motors a great choice for all motion 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 Vehicles (AGV)
Within 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 equipment takes place in analogy to the orbiting of the planets in the solar system. This is one way planetary gears acquired their name.
The parts 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 traveling sun pinion is certainly in the center of the ring gear, and is coaxially organized with regards to the output. Sunlight pinion is usually attached to a clamping system to be able to provide the mechanical connection to the electric motor shaft. During operation, the planetary gears, which are mounted on a planetary carrier, roll between your sun pinion and the band equipment. The planetary carrier also represents the result shaft of the gearbox.
The sole purpose of the planetary gears is to transfer the mandatory torque. The number of teeth has no effect on the transmitting ratio of the gearbox. The number of planets can also vary. As the amount of planetary gears raises, the distribution of the strain increases and therefore the torque that can be transmitted. Raising the number of tooth engagements also decreases the rolling power. Since just portion of the total result has to be transmitted as rolling power, a planetary equipment is extremely efficient. The benefit of a planetary equipment compared to a single spur gear lies in this load distribution. Hence, it is possible to transmit high torques wit
h high efficiency with a concise design using planetary gears.
So long as the ring gear has a constant size, different ratios can be realized by various the number of teeth of the sun gear and the number of teeth of the planetary gears. Small the sun equipment, the higher the ratio. Technically, a meaningful ratio range for a planetary stage is certainly approx. 3:1 to 10:1, because the planetary gears and the sun gear are extremely little above and below these ratios. Higher ratios can be acquired by connecting several planetary phases in series in the same band gear. In cases like this, we talk about multi-stage gearboxes.
With planetary gearboxes the speeds and torques could be overlaid by having a band gear that is not set but is driven in any direction of rotation. It is also possible to repair the drive shaft to be able to pick up the torque via the band equipment. Planetary gearboxes have become extremely important in many regions 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 transmitting ratios can also easily be achieved with planetary gearboxes. Because of the positive properties and compact design, the gearboxes possess many potential uses in industrial applications.
The benefits of planetary gearboxes:
Coaxial arrangement of input shaft and output shaft
Load distribution to several planetary gears
High efficiency because of low rolling power
Nearly unlimited transmission ratio options because of combination of several planet stages
Ideal as planetary switching gear due to fixing this or that portion of the gearbox
Possibility of use as overriding gearbox
Favorable volume output
On the surface, it may seem that gears are being “reduced” in quantity or size, which is partially true. When a rotary machine such as for example an engine or electric motor needs the output speed reduced and/or torque increased, gears are commonly utilized to accomplish the required result. Gear “reduction” specifically refers to the rate of the rotary machine; the rotational speed of the rotary machine is “reduced” by dividing it by a equipment ratio greater than 1:1. A gear ratio greater than 1:1 is certainly achieved whenever a smaller equipment (reduced size) with fewer amount of the teeth meshes and drives a larger 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 gear ratio, less some performance losses.
While in many applications gear decrease reduces speed and raises torque, in additional applications gear reduction is used to improve velocity and reduce torque. Generators in wind turbines use gear decrease in this manner to convert a relatively slow turbine blade speed to a high speed capable of producing electricity. These applications make use of gearboxes that are assembled opposite of those in applications that decrease velocity and increase torque.
How is gear decrease achieved? Many reducer types are capable of attaining gear decrease including, but not limited to, parallel shaft, planetary and right-angle worm gearboxes. In parallel shaft gearboxes (or reducers), a pinion gear with a specific number of the teeth meshes and drives a larger gear with a greater number of teeth. The “decrease” or gear ratio is definitely calculated by dividing the amount of tooth on the large equipment by the number of teeth on the small gear. For instance, if a power motor drives a 13-tooth pinion equipment that meshes with a 65-tooth gear, a reduced amount of 5:1 is usually achieved (65 / 13 = 5). If the electrical motor speed is usually 3,450 rpm, the gearbox reduces this rate by five situations to 690 rpm. If the electric motor torque can be 10 lb-in, the gearbox raises this torque by a factor of five to 50 lb-in (before subtracting out gearbox efficiency losses).
Parallel shaft gearboxes many times contain multiple gear units thereby increasing the gear reduction. The full total gear reduction (ratio) depends upon multiplying each individual gear ratio from each equipment set stage. If a gearbox contains 3:1, 4:1 and 5:1 gear units, the total ratio is 60:1 (3 x 4 x 5 = 60). Inside our example above, the 3,450 rpm electric motor would have its swiftness reduced to 57.5 rpm by using a 60:1 gearbox. The 10 lb-in electric motor torque would be risen to 600 lb-in (before effectiveness losses).
If a pinion gear and its mating gear have the same amount of teeth, no reduction occurs and the gear ratio is 1:1. The gear is named an idler and its principal function is to change the direction of rotation instead of decrease the speed or increase the torque.
Calculating the gear ratio in a planetary equipment reducer is less intuitive as it is dependent on the amount of teeth of the sun and band gears. The planet gears become idlers , nor affect the apparatus ratio. The planetary gear ratio equals the sum of the number of teeth on the sun and ring equipment divided by the amount of teeth on the sun gear. For example, a planetary set with a 12-tooth sun gear and 72-tooth ring gear includes a gear ratio of 7:1 ([12 + 72]/12 = 7). Planetary gear units can perform ratios from about 3:1 to about 11:1. If more gear reduction is needed, additional planetary stages may be used.
The gear reduction in a right-angle worm drive would depend 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 offers 50 teeth, the resulting gear ratio is 25:1 (50 / 2 = 25).
Whenever a rotary machine such as an engine or electric motor cannot supply the desired output acceleration or torque, a equipment reducer may provide a good solution. Parallel shaft, planetary, right-position worm drives are common gearbox types for achieving gear reduction. Get in touch with Groschopp today with all your gear reduction questions.

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