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 occurs 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 could be divided into four main constituents.
The housing with integrated internal teeth is actually a ring gear. In the majority of cases the casing is fixed. The generating sun pinion is certainly in the center of the ring equipment, 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 motor 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 purpose of the planetary gears is to transfer the required torque. The number of teeth does not have any effect on the tranny ratio of the gearbox. The number of planets may also vary. As the amount of planetary gears improves, the distribution of the load increases and then the torque which can be transmitted. Increasing the number of tooth engagements also decreases the rolling power. Since just part of the total result has to be transmitted as rolling power, a planetary equipment is extremely efficient. The benefit of a planetary gear 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 compact style using planetary gears.
Provided that the ring gear has a constant size, different ratios can be realized by various the amount of teeth of the sun gear and the number of the teeth of the planetary gears. The smaller the sun equipment, 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 many planetary stages in series in the same ring gear. In this instance, we speak of multi-stage gearboxes.
With planetary gearboxes the speeds and torques could be overlaid by having a band gear that’s not set but is driven in any direction of rotation. It is also possible to repair the drive shaft to be able to grab the torque via the ring equipment. 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 should be transmitted with favorable mass inertia ratio adaptation. High transmitting ratios can also easily be achieved with planetary gearboxes. Because of their 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 because of low rolling power
Almost unlimited transmission ratio options because of combination of several planet stages
Suitable as planetary switching gear due to fixing this or that part of the gearbox
Chance for use as overriding gearbox
Favorable volume output
Suitability for a wide range 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 usually replaced with hydro coupled clutch or torque convertor which in turn made the transmission automatic.
The thought of epicyclic gear box is taken from the solar system which is known as to the perfect arrangement of objects.
The epicyclic gearbox usually comes with the P N R D S (Parking, Neutral, Invert, Drive, Sport) modes which is obtained by fixing of sun and planetary gears according to the need of the drive.
Ever-Power Planetary Equipment 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 manage a various load with reduced backlash and are greatest for intermittent duty operation. With endless reduction ratio options, voltages, and sizes, Ever-Power Products includes a fully tailored equipment motor solution for you.
A Planetary Gear Motor from Ever-Power Products features among our various types of DC motors coupled with among our uniquely designed epicyclic or planetary gearheads. A planetary gearhead consists of an internal gear (sun equipment) that drives multiple outer gears (planet gears) producing torque. Multiple contact factors over the planetary gear teach allows for higher torque generation compared to one of our spur equipment motors. In turn, an Ever-Power planetary gear motor has the capacity to handle numerous load requirements; the more equipment stages (stacks), the higher the strain distribution and torque transmission.
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 design. These characteristics furthermore to our value-added features makes Ever-Power s equipment 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 Vehicles (AGV)
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 occurs 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 divided 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 usually in the heart of the ring gear, and is coaxially organized with regards to the output. The sun pinion is usually attached to a clamping system to be able to provide the mechanical link with the motor shaft. During procedure, the planetary gears, which are mounted on a planetary carrier, roll between the sun pinion and the band gear. The planetary carrier also represents the output shaft of the gearbox.
The sole purpose of the planetary gears is to transfer the required torque. The amount of teeth does not have any effect on the transmitting ratio of the gearbox. The amount of planets may also vary. As the number of planetary gears boosts, the distribution of the strain increases and therefore the torque which can be transmitted. Raising the amount of tooth engagements also decreases the rolling power. Since just portion 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. Hence, it is possible to transmit high torques wit
h high efficiency with a compact style using planetary gears.
So long as the ring gear has a constant size, different ratios could be realized by varying the number of teeth of sunlight gear and the number of the teeth of the planetary gears. The smaller the sun equipment, the greater the ratio. Technically, a meaningful ratio range for a planetary stage can be approx. 3:1 to 10:1, because the planetary gears and sunlight gear are extremely small above and below these ratios. Higher ratios can be acquired by connecting several planetary levels in series in the same ring gear. In this case, we speak of multi-stage gearboxes.
With planetary gearboxes the speeds and torques can be overlaid by having a band gear that is not fixed 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 ring gear. 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 should be transmitted with favorable mass inertia ratio adaptation. High transmitting ratios may also easily be achieved with planetary gearboxes. Because of the positive properties and small 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 many planetary gears
High efficiency due to low rolling power
Nearly unlimited transmission ratio options due to mixture of several planet stages
Suitable 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 may appear that gears are being “reduced” in quantity or size, which is partially true. When a rotary machine such as an engine or electrical motor needs the output speed reduced and/or torque increased, gears are commonly used to accomplish the required result. Gear “reduction” particularly refers to the velocity of the rotary machine; the rotational rate of the rotary machine can be “reduced” by dividing it by a equipment ratio greater than 1:1. A gear ratio higher than 1:1 is achieved when a smaller gear (decreased size) with fewer amount of teeth meshes and drives a larger gear with greater quantity of teeth.
Gear reduction has the opposite influence on torque. The rotary machine’s result torque is improved by multiplying the torque by the apparatus ratio, less some efficiency losses.
While in many applications gear decrease reduces speed and boosts torque, in various other applications gear reduction is used to improve rate and reduce torque. Generators in wind generators use gear reduction in this manner to convert a comparatively slow turbine blade quickness to a higher speed capable of generating electricity. These applications use gearboxes that are assembled opposite of those in applications that reduce speed 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-position worm gearboxes. In parallel shaft gearboxes (or reducers), a pinion gear with a certain number of teeth meshes and drives a larger gear with a lot more teeth. The “reduction” or equipment ratio is definitely calculated by dividing the number of teeth 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 certainly achieved (65 / 13 = 5). If the electric motor speed can be 3,450 rpm, the gearbox reduces this speed by five occasions to 690 rpm. If the electric motor torque is usually 10 lb-in, the gearbox increases this torque by a factor of five to 50 lb-in (before subtracting out gearbox effectiveness 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 established stage. If a gearbox includes 3:1, 4:1 and 5:1 gear sets, the 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 motor torque would be risen to 600 lb-in (before efficiency losses).
If a pinion gear and its mating equipment have the same number of teeth, no reduction occurs and the apparatus ratio is 1:1. The gear is named an idler and its own major function is to improve the direction of rotation rather than decrease the speed or raise the torque.
Calculating the gear ratio in a planetary gear reducer is much less intuitive since it is dependent upon the number of teeth of sunlight and ring gears. The planet gears become idlers and don’t affect the gear ratio. The planetary equipment ratio equals the sum of the number of teeth on sunlight and ring equipment divided by the amount of teeth on the sun gear. For instance, a planetary arranged with a 12-tooth sun gear and 72-tooth ring gear has a equipment ratio of 7:1 ([12 + 72]/12 = 7). Planetary gear sets 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 is dependent on the amount of threads or “starts” on the worm and the number of teeth on the mating worm wheel. If the worm has two begins and the mating worm wheel offers 50 the teeth, the resulting equipment ratio is 25:1 (50 / 2 = 25).
When a rotary machine such as for example an engine or electric motor cannot supply the desired output quickness or torque, a gear reducer may provide a good solution. Parallel shaft, planetary, right-position worm drives are common gearbox types for attaining gear reduction. Contact Groschopp today with all of your gear reduction questions.