epicyclic gearbox

Within 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 equipment occurs in analogy to the orbiting of the planets in the solar system. This is one way planetary gears acquired their name.
The elements 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 the majority of cases the casing is fixed. The driving sun pinion is usually in the heart of the ring gear, and is coaxially organized with regards to the output. Sunlight pinion is usually mounted on a clamping system in order to provide the mechanical link with the engine shaft. During procedure, the planetary gears, which are mounted on a planetary carrier, roll between your sun 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 mandatory torque. The amount of teeth has no effect on the transmission ratio of the gearbox. The number of planets can also vary. As the number of planetary gears increases, the distribution of the strain increases and therefore the torque which can be transmitted. Increasing the amount of tooth engagements also reduces the rolling power. Since only section of the total output needs to be transmitted as rolling power, a planetary gear is incredibly efficient. The benefit of a planetary gear compared to a single spur gear is based on this load distribution. It is therefore possible to transmit high torques wit
h high efficiency with a concise style using planetary gears.
Provided that the ring gear has a constant size, different ratios could be realized by different the amount of teeth of the sun gear and the number of the teeth of the planetary gears. The smaller the sun gear, the greater the ratio. Technically, a meaningful ratio range for a planetary stage can be 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 acquired by connecting a number of 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 could be overlaid by having a ring gear that is not fixed but is driven in virtually any direction of rotation. Additionally it is possible to fix the drive shaft in order to pick up the torque via the band gear. Planetary gearboxes have become extremely important in lots of areas of mechanical engineering.
They have become particularly more developed in areas where high output levels and fast speeds must be transmitted with favorable mass inertia ratio adaptation. High tranny ratios may also easily be performed with planetary gearboxes. Because of the positive properties and compact design, the gearboxes have 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 due to low rolling power
Nearly unlimited transmission ratio options because of mixture of several planet stages
Appropriate as planetary switching gear because of fixing this or that section of the gearbox
Possibility of use as overriding gearbox
Favorable volume output
Suitability for a wide selection of applications
Epicyclic gearbox is an automatic type gearbox where parallel shafts and gears set up from manual gear box are replaced with an increase of compact and more dependable sun and planetary type of gears arrangement and also the manual clutch from manual power teach is definitely replaced with hydro coupled clutch or torque convertor which in turn produced the transmission automatic.
The idea of epicyclic gear box is taken from the solar system which is known as to the perfect arrangement of objects.
The epicyclic gearbox usually includes the P N R D S (Parking, Neutral, Reverse, Drive, Sport) modes which is obtained by fixing of sun and planetary gears based on the need of the drive.
Ever-Power Planetary Equipment Motors are an inline remedy providing high torque in low speeds. Our Planetary Gear Motors provide a high efficiency and provide excellent torque output in comparison with other types of gear motors. They can handle a various load with minimal backlash and are best for intermittent duty procedure. With endless reduction ratio choices, voltages, and sizes, Ever-Power Products has a fully tailored equipment motor remedy for you.
A Planetary Gear Motor 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 consists of an interior gear (sun equipment) that drives multiple external gears (planet gears) producing torque. Multiple contact points across the planetary gear teach permits higher torque generation compared to among our spur equipment motors. Subsequently, an Ever-Power planetary equipment motor has the capacity to handle different load requirements; the more gear stages (stacks), the bigger the load distribution and torque transmission.
Features and Benefits
High Torque Capabilities
Sleek Inline Design
High Efficiency
Capability to Handle Large Reduction Ratios
High Power Density
Applications
Our Planetary Equipment Motors deliver exceptional torque output and performance in a concise, low noise design. These characteristics in addition to our value-added features makes Ever-Power s gear 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)
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 exterior teeth on a concentric orbit. The circulation of the spur gear occurs in analogy to the orbiting of the planets in the solar system. This is one way planetary gears acquired their name.
The elements of a planetary gear train could be split 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 usually in the center of the ring gear, and is coaxially arranged with regards to the output. The sun pinion is usually attached to a clamping system in order to provide the mechanical link with the electric motor shaft. During operation, the planetary gears, which are mounted on a planetary carrier, roll between the sun pinion and the band equipment. 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 number of teeth does not have any effect on the transmission 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 then the torque that can be transmitted. Raising the number of tooth engagements also decreases the rolling power. Since only portion of the total result has to be transmitted as rolling power, a planetary gear is incredibly efficient. The advantage of a planetary gear compared to an individual spur gear lies in this load distribution. It is therefore possible to transmit high torques wit
h high efficiency with a compact style using planetary gears.
So long as the ring gear has a continuous size, different ratios could be realized by varying the amount of teeth of the sun gear and the amount of teeth of the planetary gears. The smaller the sun gear, the greater the ratio. Technically, a meaningful ratio range for a planetary stage is certainly approx. 3:1 to 10:1, since the planetary gears and the sun 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 cases like this, we speak of multi-stage gearboxes.
With planetary gearboxes the speeds and torques can be overlaid by having a band gear that’s not set but is driven in any direction of rotation. Additionally it is possible to fix the drive shaft to be able to pick up the torque via the ring equipment. Planetary gearboxes have grown to be extremely important in lots of areas 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 tranny ratios can also easily be performed with planetary gearboxes. Because of their positive properties and small design, the gearboxes have many potential uses in commercial applications.
The advantages of planetary gearboxes:
Coaxial arrangement of input shaft and output shaft
Load distribution to several planetary gears
High efficiency due to low rolling power
Almost unlimited transmission ratio options because of combination of several planet stages
Ideal as planetary switching gear because of fixing this or that section of the gearbox
Possibility of 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. When a rotary machine such as for example an engine or electrical motor needs the output speed reduced and/or torque increased, gears are commonly utilized to accomplish the desired result. Gear “reduction” particularly refers to the speed of the rotary machine; the rotational rate of the rotary machine is certainly “reduced” by dividing it by a gear ratio greater than 1:1. A gear ratio higher than 1:1 is usually achieved when a smaller gear (decreased size) with fewer quantity of the teeth meshes and drives a larger gear with greater amount of teeth.
Gear reduction gets the opposite influence on torque. The rotary machine’s output torque is increased by multiplying the torque by the gear ratio, less some performance losses.
While in lots of applications gear reduction reduces speed and raises torque, in other applications gear decrease is used to increase rate and reduce torque. Generators in wind generators use gear reduction in this manner to convert a comparatively slow turbine blade rate to a higher speed capable of producing electricity. These applications make use of gearboxes that are assembled opposing of those in applications that reduce rate and increase torque.
How is gear decrease achieved? Many reducer types are capable of attaining gear reduction including, but not limited by, parallel shaft, planetary and right-position worm gearboxes. In parallel shaft gearboxes (or reducers), a pinion equipment with a particular 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 amount 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 reduced amount of 5:1 is achieved (65 / 13 = 5). If the electric motor speed can be 3,450 rpm, the gearbox reduces this velocity by five moments to 690 rpm. If the engine torque is definitely 10 lb-in, the gearbox improves this torque by a factor of five to 50 lb-in (before subtracting out gearbox effectiveness losses).
Parallel shaft gearboxes often contain multiple gear pieces thereby increasing the apparatus reduction. The total gear decrease (ratio) is determined by multiplying each individual gear ratio from each equipment set stage. If a gearbox consists of 3:1, 4:1 and 5:1 gear pieces, 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 acceleration 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 efficiency losses).
If a pinion gear and its mating gear have the same number of teeth, no decrease occurs and the apparatus ratio is 1:1. The apparatus is named an idler and its main function is to improve the path of rotation rather than reduce the speed or boost the torque.
Calculating the apparatus ratio in a planetary equipment reducer is much less intuitive since it is dependent on the amount of teeth of the sun and ring gears. The earth gears become idlers and do not affect the apparatus ratio. The planetary equipment ratio equals the sum of the number of teeth on the sun and ring equipment divided by the number of teeth on the sun gear. For example, a planetary set with a 12-tooth sun gear and 72-tooth ring gear has a gear ratio of 7:1 ([12 + 72]/12 = 7). Planetary gear pieces can achieve ratios from about 3:1 to about 11:1. If more equipment 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 starts and the mating worm wheel provides 50 teeth, the resulting gear ratio is 25:1 (50 / 2 = 25).
When a rotary machine such as an engine or electric motor cannot provide the desired output swiftness or torque, a gear reducer may provide a good solution. Parallel shaft, planetary, right-angle worm drives are common gearbox types for attaining gear reduction. Get in touch with Groschopp today with all your gear reduction questions.