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 gear takes place in analogy to the orbiting of the planets in the solar system. This is how planetary gears obtained their name.
The components of a planetary gear train can be divided into four main constituents.
The housing with integrated internal teeth is actually a ring gear. In nearly all cases the housing is fixed. The traveling sun pinion is certainly in the heart of the ring equipment, and is coaxially organized in relation to the output. Sunlight pinion is usually mounted on a clamping system to be able to offer the mechanical connection to the motor shaft. During procedure, the planetary gears, which are installed on a planetary carrier, roll between your sunlight pinion and the ring gear. The planetary carrier also represents the result shaft of the gearbox.
The sole reason for the planetary gears is to transfer the mandatory torque. The amount 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 therefore the torque which can be transmitted. Raising the amount of tooth engagements also decreases the rolling power. Since only section of the total output needs to be transmitted as rolling power, a planetary equipment is incredibly efficient. The advantage of a planetary equipment compared to an individual spur gear is based on this load distribution. Hence, it is feasible to transmit high torques wit
h high efficiency with a concise design using planetary gears.
Provided that the ring gear includes a continuous size, different ratios can be realized by various the number of teeth of sunlight gear and the number of tooth of the planetary gears. The smaller the sun equipment, the higher the ratio. Technically, a meaningful ratio range for a planetary stage can be approx. 3:1 to 10:1, since the planetary gears and sunlight gear are extremely small above and below these ratios. Higher ratios can be acquired by connecting several planetary stages in series in the same ring gear. In this case, 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 grab the torque via the band gear. Planetary gearboxes have become extremely important in many regions 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 transmitting ratios may also easily be performed with planetary gearboxes. Because of the 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 portion of the gearbox
Chance for use as overriding gearbox
Favorable volume output
Suitability for an array of applications
Epicyclic gearbox can be an automatic type gearbox where parallel shafts and gears arrangement from manual gear box are replaced with an increase of compact and more dependable sun and planetary kind of gears arrangement as well as the manual clutch from manual power train is usually replaced with hydro coupled clutch or torque convertor which made the transmission automatic.
The idea of epicyclic gear box is taken from the solar system which is known as to an ideal arrangement of objects.
The epicyclic gearbox usually comes with the P N R D S (Parking, Neutral, Invert, Drive, Sport) settings which is obtained by fixing of sun and planetary gears based on the need of the drive.
Ever-Power Planetary Gear Motors are an inline remedy providing high torque at low speeds. Our Planetary Gear Motors offer a high efficiency and provide excellent torque output when compared to other types of equipment motors. They can deal with 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 solution for you.
A Planetary Gear Motor from Ever-Power Items features among our numerous kinds of DC motors coupled with one of our uniquely designed epicyclic or planetary gearheads. A planetary gearhead consists of an internal gear (sun gear) that drives multiple external gears (planet gears) producing torque. Multiple contact factors across the planetary gear train permits higher torque generation compared to one of our spur gear motors. In turn, an Ever-Power planetary gear motor has the ability to handle numerous load requirements; the more gear stages (stacks), the higher the load distribution and torque tranny.
Features and Benefits
High Torque Capabilities
Sleek Inline Design
High Efficiency
Ability to Handle Large Reduction Ratios
High Power Density
Applications
Our Planetary Gear Motors deliver exceptional torque output and effectiveness in a compact, low noise design. These characteristics furthermore to our value-added features makes Ever-Power s gear motors a fantastic 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 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 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 split into four main constituents.
The housing with integrated internal teeth is known as a ring gear. In nearly all cases the casing is fixed. The generating sun pinion is certainly in the heart 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 offer the mechanical link with the motor shaft. During procedure, the planetary gears, which are installed 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 number of teeth has no effect on the transmission ratio of the gearbox. The amount of planets can also vary. As the number of planetary gears raises, the distribution of the load increases and therefore the torque that can be transmitted. Raising the number of tooth engagements also decreases the rolling power. Since just section of the total output needs to be transmitted as rolling power, a planetary gear is extremely efficient. The benefit of a planetary equipment compared to a single spur gear is based on this load distribution. It is therefore feasible to transmit high torques wit
h high efficiency with a concise style using planetary gears.
So long as the ring gear has a constant size, different ratios can be realized by varying the number of teeth of sunlight gear and the number of tooth of the planetary gears. The smaller the sun equipment, the higher 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 acquired by connecting many planetary stages 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 ring gear that is not set but is driven in virtually any direction of rotation. Additionally it is possible to repair the drive shaft in order to pick up the torque via the band equipment. Planetary gearboxes have grown to be extremely important in lots of 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 tranny ratios can also easily be achieved with planetary gearboxes. Because of their positive properties and small 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 several planetary gears
High efficiency due to low rolling power
Almost unlimited transmission ratio options because of mixture of several planet stages
Appropriate as planetary switching gear due to fixing this or that area of the gearbox
Chance for use as overriding gearbox
Favorable volume output
On the surface, it could appear that gears are being “reduced” in quantity or size, which is partially true. Whenever a rotary machine such as for example an engine or electric motor needs the output speed decreased and/or torque improved, gears are commonly used to accomplish the required result. Gear “reduction” specifically refers to the swiftness of the rotary machine; the rotational velocity of the rotary machine is definitely “reduced” by dividing it by a equipment ratio higher than 1:1. A gear ratio higher than 1:1 is achieved whenever a smaller gear (decreased size) with fewer number of teeth meshes and drives a larger gear with greater number 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 increases torque, in various other applications gear decrease is used to increase rate and reduce torque. Generators in wind turbines use gear decrease in this fashion to convert a comparatively slow turbine blade swiftness to a higher speed capable of producing electricity. These applications make use of gearboxes that are assembled opposing 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 more substantial gear with a lot more teeth. The “reduction” or equipment ratio can be calculated by dividing the number of teeth on the large equipment by the amount of teeth on the tiny gear. For instance, if an electric motor drives a 13-tooth pinion gear that meshes with a 65-tooth equipment, a reduction of 5:1 is definitely achieved (65 / 13 = 5). If the electric motor speed is definitely 3,450 rpm, the gearbox reduces this quickness by five times to 690 rpm. If the electric motor torque is certainly 10 lb-in, the gearbox boosts 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 sets thereby increasing the gear reduction. The total gear reduction (ratio) depends upon multiplying each individual equipment ratio from each equipment arranged stage. If a gearbox consists of 3:1, 4:1 and 5:1 gear models, 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 engine torque would be risen to 600 lb-in (before effectiveness losses).
If a pinion gear and its mating gear have the same number of teeth, no reduction occurs and the gear ratio is 1:1. The apparatus is named an idler and its own main function is to change the path of rotation rather than decrease the speed or increase the torque.
Calculating the gear ratio in a planetary gear reducer is less intuitive since it is dependent on the number of teeth of the sun and ring gears. The planet gears act as idlers and do not affect the apparatus ratio. The planetary gear ratio equals the sum of the number of teeth on sunlight and ring equipment divided by the number of teeth on sunlight gear. For instance, 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 pieces can perform ratios from about 3:1 to about 11:1. If more gear reduction is needed, additional planetary stages can be used.
The gear reduction in a right-angle worm drive is dependent on the number 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 offers 50 the teeth, the resulting equipment ratio is 25:1 (50 / 2 = 25).
Whenever a rotary machine such as for example an engine or electric motor cannot supply the desired output swiftness or torque, a equipment reducer may provide a good solution. Parallel shaft, planetary, right-position worm drives are normal gearbox types for attaining gear reduction. Contact Groschopp today with all of your gear reduction questions.