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 gear occurs 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 could be divided 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 generating sun pinion is usually in the center of the ring equipment, and is coaxially arranged in relation to the output. Sunlight pinion is usually mounted on a clamping system in order to offer the mechanical connection to the motor shaft. During procedure, the planetary gears, which are mounted on a planetary carrier, roll between your sunlight pinion and the ring 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 tranny ratio of the gearbox. The amount of planets may also vary. As the number of planetary gears boosts, 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 only portion of the total output has to be transmitted as rolling power, a planetary gear is incredibly efficient. The benefit of a planetary equipment 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 concise style using planetary gears.
So long as the ring gear includes a continuous size, different ratios can be realized by different the amount of teeth of the sun gear and the number of tooth of the planetary gears. Small 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 the sun gear are extremely small above and below these ratios. Higher ratios can be obtained by connecting many 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 band gear that’s not set but is driven in any direction of rotation. It is also possible to repair the drive shaft in order to pick up the torque via the band gear. Planetary gearboxes have grown to be extremely important in many regions 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 performed with planetary gearboxes. Because of their positive properties and small design, the gearboxes have many potential uses in industrial applications.
The advantages 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 due to combination of several planet stages
Suitable as planetary switching gear because of fixing this or that area of the gearbox
Possibility of use as overriding gearbox
Favorable volume output
Suitability for an array of applications
Epicyclic gearbox can be an automatic type gearbox in which parallel shafts and gears arrangement from manual equipment box are replaced with more compact and more dependable sun and planetary kind of gears arrangement as well as the manual clutch from manual power teach is certainly replaced with hydro coupled 
clutch or torque convertor which produced the transmission automatic.
The thought 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 Equipment Motors are an inline answer providing high torque at low speeds. Our Planetary Gear Motors provide a high efficiency and offer excellent torque output when compared to other types of equipment motors. They can deal with a varying load with minimal backlash and are greatest for intermittent duty procedure. With endless decrease ratio choices, voltages, and sizes, Ever-Power Products has a fully tailored gear motor option for you.
A Planetary Gear Motor from Ever-Power Items features one of our numerous kinds of DC motors in conjunction with one of our uniquely designed epicyclic or planetary gearheads. A planetary gearhead contains an interior gear (sun equipment) that drives multiple outer gears (planet gears) generating torque. Multiple contact factors across the planetary gear train permits higher torque generation compared to among 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 bigger 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 result and performance in a concise, low noise design. 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)
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 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 the majority of cases the housing is fixed. The traveling sun pinion is usually in the center of the ring gear, 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 link with the electric motor shaft. During operation, the planetary gears, which are installed on a planetary carrier, roll between the sunlight pinion and the ring equipment. 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 has no effect on the transmitting ratio of the gearbox. The number of planets may also vary. As the amount of planetary gears improves, the distribution of the strain increases and therefore the torque that can be transmitted. Raising the amount of tooth engagements also decreases the rolling power. Since only part 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 an individual spur gear lies in this load distribution. Hence, it is feasible 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 could be realized by varying the number of teeth of the sun gear and the number of tooth 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 the sun gear are extremely small above and below these ratios. Higher ratios can be acquired 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 could be overlaid by having a ring gear that is not set but is driven in any direction of rotation. Additionally it is possible to repair the drive shaft in order to grab the torque via the ring gear. Planetary gearboxes have grown to be extremely important in many regions 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 transmission 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 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 area of the gearbox
Chance for 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 electrical motor needs the result speed decreased and/or torque improved, gears are commonly used to accomplish the desired result. Gear “reduction” particularly refers to the velocity of the rotary machine; the rotational rate of the rotary machine is definitely “decreased” by dividing it by a equipment ratio higher than 1:1. A gear ratio higher than 1:1 is achieved when a smaller gear (reduced size) with fewer amount of the teeth meshes and drives a larger gear with greater amount of teeth.
Gear reduction gets the opposite effect on torque. The rotary machine’s result torque is improved by multiplying the torque by the apparatus ratio, less some effectiveness losses.
While in many applications gear decrease reduces speed and increases torque, in other applications gear decrease is used to increase swiftness and reduce torque. Generators in wind turbines use gear decrease in this manner to convert a comparatively slow turbine blade quickness to a higher speed capable of generating electricity. These applications make use of gearboxes that are assembled opposite of these in applications that reduce velocity and increase torque.
How is gear reduction achieved? Many reducer types are capable of attaining gear decrease including, but not limited by, parallel shaft, planetary and right-angle worm gearboxes. In parallel shaft gearboxes (or reducers), a pinion gear with a certain number of the teeth meshes and drives a more substantial gear with a greater number of teeth. The “reduction” or equipment ratio is calculated by dividing the number of tooth on the large gear by the amount of teeth on the tiny gear. For instance, if a power motor drives a 13-tooth pinion equipment that meshes with a 65-tooth equipment, a reduced amount of 5:1 is certainly achieved (65 / 13 = 5). If the electric motor speed can be 3,450 rpm, the gearbox reduces this swiftness by five times to 690 rpm. If the electric motor torque is certainly 10 lb-in, the gearbox improves this torque by a factor of five to 50 lb-in (before subtracting out gearbox performance losses).
Parallel shaft gearboxes many times contain multiple gear units thereby increasing the apparatus reduction. The full total gear reduction (ratio) depends upon multiplying each individual equipment ratio from each gear set stage. If a gearbox includes 3:1, 4:1 and 5:1 gear pieces, the full total ratio is 60:1 (3 x 4 x 5 = 60). Inside our example above, the 3,450 rpm electric motor would have its rate decreased to 57.5 rpm by using a 60:1 gearbox. The 10 lb-in electric engine torque would be increased to 600 lb-in (before effectiveness losses).
If a pinion equipment and its mating gear have the same amount of teeth, no decrease occurs and the apparatus ratio is 1:1. The gear is called an idler and its own primary function is to change the path of rotation rather than reduce the speed or increase the torque.
Calculating the gear ratio in a planetary gear reducer is less intuitive since it is dependent on the amount of teeth of the sun and band gears. The planet gears act as idlers , nor affect the apparatus ratio. The planetary equipment ratio equals the sum of the number 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 includes a equipment ratio of 7:1 ([12 + 72]/12 = 7). Planetary gear sets 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 would depend 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 has 50 teeth, the resulting gear ratio is 25:1 (50 / 2 = 25).
When a rotary machine such as an engine or electric engine cannot supply the desired output velocity 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. Get in touch with Groschopp today with all your gear reduction questions.