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December 24, 2019

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 exterior 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 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 casing is fixed. The traveling sun pinion is in the center 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 electric motor shaft. During procedure, the planetary gears, which are installed 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 reason for the planetary gears is to transfer the required torque. The amount of teeth has no effect on the tranny ratio of the gearbox. The number of planets may also vary. As the amount of planetary gears boosts, the distribution of the load increases and then the torque that can be transmitted. Raising the number of tooth engagements also reduces the rolling power. Since only section of the total result needs to be transmitted as rolling power, a planetary gear is extremely efficient. The advantage of a planetary equipment compared to an individual spur gear lies in this load distribution. It is therefore feasible to transmit high torques wit
h high efficiency with a concise design using planetary gears.
So long as the ring gear has a continuous size, different ratios could be realized by various the amount of teeth of sunlight gear and the amount of the teeth of the planetary gears. Small the sun gear, 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 little 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 talk about multi-stage gearboxes.
With planetary gearboxes the speeds and torques could be overlaid by having a ring 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 band gear. Planetary gearboxes have become 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 transmitting ratios can also easily be performed with planetary gearboxes. Because of the 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 due to low rolling power
Almost unlimited transmission ratio options due to mixture 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
Suitability for an array of applications
Epicyclic gearbox is an automatic type gearbox where parallel shafts and gears arrangement from manual equipment box are replaced with more compact and more reliable sun and planetary kind of gears arrangement as well as 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 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 includes the P N R D S (Parking, Neutral, Invert, Drive, Sport) modes 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 solution providing high torque at 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 varying load with minimal backlash and are best for intermittent duty operation. With endless reduction ratio choices, voltages, and sizes, Ever-Power Products has a fully tailored gear motor alternative for you.
A Planetary Gear Electric motor from Ever-Power Products features among our numerous kinds of DC motors coupled with among our uniquely designed epicyclic or planetary gearheads. A planetary gearhead consists of an interior gear (sun equipment) that drives multiple outer gears (planet gears) generating torque. Multiple contact points across the planetary gear train allows for higher torque generation in comparison to one of our spur equipment motors. Subsequently, an Ever-Power planetary equipment motor has the capacity to handle various load requirements; the more gear stages (stacks), the bigger the strain distribution and torque transmitting.
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 compact, low noise style. These characteristics furthermore to our value-added features makes Ever-Power s equipment 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 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 program. 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 housing is fixed. The generating sun pinion can be in the center of the ring gear, and is coaxially organized in relation to the output. The sun pinion is usually mounted on a clamping system to be able to provide the mechanical link with the motor shaft. During operation, 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 required torque. The amount of teeth has no effect on the tranny ratio of the gearbox. The number of planets may also vary. As the amount of planetary gears increases, the distribution of the strain increases and therefore the torque which can be transmitted. Raising the amount of tooth engagements also reduces the rolling power. Since just part of the total result needs to be transmitted as rolling power, a planetary gear is extremely efficient. The benefit of a planetary equipment compared to an individual 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.
So long as the ring gear includes a continuous size, different ratios could 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 certainly 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 obtained by connecting many planetary phases in series in the same band gear. In this case, 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 fix the drive shaft to be able to pick up the torque via the ring equipment. Planetary gearboxes have become extremely important in lots of areas of mechanical engineering.
They have grown to be 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 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 several planetary gears
High efficiency due to low rolling power
Nearly unlimited transmission ratio options because of combination of several planet stages
Suitable 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 may seem 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 result speed reduced and/or torque improved, gears are commonly utilized to accomplish the required result. Gear “reduction” particularly refers to the quickness of the rotary machine; the rotational acceleration of the rotary machine can be “decreased” by dividing it by a gear ratio higher than 1:1. A gear ratio higher than 1:1 is achieved whenever a smaller equipment (decreased size) with fewer number of the 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 improved by multiplying the torque by the apparatus ratio, less some efficiency losses.
While in many applications gear decrease reduces speed and improves torque, in additional applications gear decrease is used to increase rate 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 make use of gearboxes that are assembled opposing of these in applications that reduce speed and increase torque.
How is gear reduction achieved? Many reducer types are capable of attaining gear reduction including, but not limited to, parallel shaft, planetary and right-angle worm gearboxes. In parallel shaft gearboxes (or reducers), a pinion equipment with a specific number of the teeth meshes and drives a larger gear with a greater number of teeth. The “decrease” or gear ratio can be calculated by dividing the number of tooth on the large gear by the number of teeth on the tiny gear. For instance, if a power motor drives a 13-tooth pinion gear that meshes with a 65-tooth gear, a reduction of 5:1 is achieved (65 / 13 = 5). If the electric motor speed is certainly 3,450 rpm, the gearbox reduces this swiftness by five situations to 690 rpm. If the engine torque is 10 lb-in, the gearbox improves 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 apparatus reduction. The total gear decrease (ratio) is determined by multiplying each individual gear ratio from each gear arranged stage. If a gearbox contains 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 velocity decreased to 57.5 rpm by utilizing a 60:1 gearbox. The 10 lb-in electric motor torque would be risen to 600 lb-in (before performance losses).
If a pinion gear and its mating equipment have the same number of teeth, no decrease occurs and the apparatus ratio is 1:1. The gear is called an idler and its primary function is to change the direction of rotation instead of decrease the speed or raise the torque.
Calculating the apparatus ratio in a planetary equipment reducer is much less intuitive as it is dependent on the amount of teeth of sunlight and band gears. The planet gears act as idlers and don’t affect the apparatus ratio. The planetary gear ratio equals the sum of the amount of teeth on sunlight and ring equipment divided by the amount of teeth on the sun gear. For example, 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 gear reduction is necessary, 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 provides 50 teeth, the resulting equipment ratio is 25:1 (50 / 2 = 25).
Whenever a rotary machine such as an engine or electric engine cannot supply the desired output velocity or torque, a gear reducer may provide a great choice. Parallel shaft, planetary, right-position worm drives are common gearbox types for attaining gear reduction. Contact Groschopp today with all your gear reduction questions.