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 takes place in analogy to the orbiting of the planets in the solar program. This is one way planetary gears acquired their name.
The parts 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 in the heart 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 offer the mechanical link with the electric 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 reason for 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 can also vary. As the amount of planetary gears improves, the distribution of the load increases and therefore the torque that can be transmitted. Raising the amount of tooth engagements also decreases the rolling power. Since just area of the total output has to be transmitted as rolling power, a planetary gear is extremely efficient. The benefit of a planetary gear 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 compact style using planetary gears.
Provided that the ring gear includes a continuous size, different ratios could be realized by various the amount of teeth of sunlight gear and the amount of teeth of the planetary gears. Small the sun equipment, the greater the ratio. Technically, a meaningful ratio range for a planetary stage is usually 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 several planetary phases 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 band gear that’s not set 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 gear. 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 should be transmitted with favorable mass inertia ratio adaptation. High tranny 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 advantages 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 because of combination of several planet stages
Ideal as planetary switching gear because of fixing this or that portion 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 where parallel shafts and gears set up from manual gear box are replaced with an increase of compact and more reliable sun and planetary kind of gears arrangement and also the manual clutch from manual power train is certainly replaced with hydro coupled clutch or torque convertor which made the transmission automatic.
The thought 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, Reverse, 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 in low speeds. Our Planetary Gear Motors provide a high efficiency and offer excellent torque output in comparison with other types of equipment motors. They can handle a various load with minimal backlash and are greatest for intermittent duty operation. With endless reduction ratio choices, voltages, and sizes, Ever-Power Products has a fully tailored equipment motor answer for you.
A Planetary Gear Motor from Ever-Power Items features among our various types of DC motors in conjunction with one of our uniquely designed epicyclic or planetary gearheads. A planetary gearhead includes an interior gear (sun equipment) that drives multiple outer gears (planet gears) generating torque. Multiple contact points across the planetary gear teach permits higher torque generation in comparison to one of our spur gear motors. In turn, an Ever-Power planetary gear motor has the ability to handle different load requirements; the more equipment stages (stacks), the higher the strain distribution and torque transmitting.
Features and Benefits
High Torque Capabilities
Sleek Inline Design
High Efficiency
Capability to Handle Large Reduction Ratios
High Power Density
Applications
Our Planetary Gear Motors deliver exceptional torque output and efficiency in a compact, low noise style. These characteristics furthermore 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 Automobiles (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 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 one way planetary gears obtained their name.
The parts 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 generating sun pinion is in the heart of the ring gear, and is coaxially arranged in relation to the output. Sunlight pinion is usually attached to a clamping system to be able to provide the mechanical link with the electric motor shaft. During procedure, the planetary gears, which are installed on a planetary carrier, roll between the 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 required torque. The amount of teeth does not have any effect on the tranny ratio of the gearbox. The number of planets may also vary. As the number of planetary gears improves, the distribution of the load increases and therefore the torque that can be transmitted. Increasing the number of tooth engagements also reduces the rolling power. Since only section 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 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 design using planetary gears.
Provided that the ring gear includes a constant size, different ratios can be realized by different the amount of teeth of the sun gear and the number of teeth 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 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 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 virtually any direction of rotation. Additionally it is possible to repair the drive shaft in order to pick up the torque via the ring equipment. 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 must be transmitted with favorable mass inertia ratio adaptation. High transmitting ratios may also easily be achieved with planetary gearboxes. Because of their 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
Almost unlimited transmission ratio options due to combination of several planet stages
Suitable as planetary switching gear because of fixing this or that section 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 an engine or electrical motor needs the output speed decreased and/or torque improved, gears are commonly utilized to accomplish the required result. Gear “reduction” particularly refers to the acceleration of the rotary machine; the rotational quickness of the rotary machine is “decreased” by dividing it by a equipment ratio greater than 1:1. A gear ratio greater than 1:1 can be achieved when a smaller gear (decreased size) with fewer number of tooth meshes and drives a larger gear with greater quantity of teeth.
Gear reduction gets the opposite influence on torque. The rotary machine’s result torque is improved by multiplying the torque by the apparatus ratio, less some performance losses.
While in many applications gear decrease reduces speed and increases torque, in other applications gear reduction is used to increase acceleration and reduce torque. Generators in wind generators use gear reduction in this manner to convert a relatively slow turbine blade acceleration to a higher speed capable of generating electricity. These applications use gearboxes that are assembled opposing of those in applications that decrease rate and increase torque.
How is gear reduction achieved? Many reducer types can handle attaining gear decrease including, but not limited by, parallel shaft, planetary and right-position worm gearboxes. In parallel shaft gearboxes (or reducers), a pinion gear with a specific number of tooth meshes and drives a more substantial gear with a greater number of teeth. The “decrease” or equipment ratio is certainly calculated by dividing the amount of teeth on the large equipment by the number of teeth on the tiny gear. For example, if an electric motor drives a 13-tooth pinion equipment that meshes with a 65-tooth equipment, a reduction of 5:1 is certainly achieved (65 / 13 = 5). If the electrical motor speed is 3,450 rpm, the gearbox reduces this rate by five moments to 690 rpm. If the motor torque can be 10 lb-in, the gearbox boosts 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 pieces thereby increasing the apparatus reduction. The full total gear decrease (ratio) depends upon multiplying each individual gear ratio from each equipment set 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). 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 efficiency losses).
If a pinion equipment and its mating gear have the same quantity of teeth, no decrease occurs and the apparatus ratio is 1:1. The gear is called an idler and its main function is to improve the path of rotation instead of decrease the speed or increase the torque.
Calculating the gear ratio in a planetary gear reducer is less intuitive since it is dependent upon the number of teeth of sunlight and band gears. The earth gears act as idlers and do not affect the gear ratio. The planetary gear ratio equals the sum of the amount of teeth on sunlight and ring equipment divided by the number of teeth on the sun gear. For example, a planetary arranged with a 12-tooth sun gear and 72-tooth ring gear has a gear ratio of 7:1 ([12 + 72]/12 = 7). Planetary gear units can achieve ratios from about 3:1 to about 11:1. If more gear reduction is needed, additional planetary stages may be used.
The gear decrease in a right-angle worm drive is dependent 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 equipment ratio is 25:1 (50 / 2 = 25).
When a rotary machine such as for example an engine or electric motor cannot provide the desired output velocity or torque, a equipment 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 of your gear reduction questions.
