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 equipment occurs in analogy to the orbiting of the planets in the solar program. This is one way planetary gears acquired their name.
The elements 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 the majority of cases the casing is fixed. The generating sun pinion is definitely in the center 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 provide the mechanical link with the electric motor shaft. During operation, the planetary gears, which are mounted on a planetary carrier, roll between the sun 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 transmission 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 then the torque that can be transmitted. Increasing the number of tooth engagements also reduces the rolling power. Since just portion of the total result has to be transmitted as rolling power, a planetary gear is extremely efficient. The benefit of a planetary gear compared to a single spur gear lies in this load distribution. It is therefore 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 amount of teeth of the sun gear and the amount of teeth of the planetary gears. Small the sun gear, 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 little above and below these ratios. Higher ratios can be obtained 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 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 to be able to pick up the torque via the ring equipment. 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 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 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 because of combination 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 a wide variety of applications
Epicyclic gearbox is an automatic type gearbox in which parallel shafts and gears arrangement from manual equipment box are replaced with more compact and more reliable sun and planetary type of gears arrangement and also the manual clutch from manual power teach can be replaced with hydro coupled clutch or torque convertor which in turn produced 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) modes which is obtained by fixing of sun and planetary gears according to the require of the drive.
Ever-Power Planetary Gear Motors are an inline alternative 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 gear motors. They can manage a different load with reduced backlash and are greatest for intermittent duty operation. With endless decrease ratio options, voltages, and sizes, Ever-Power Products includes a fully tailored gear motor option for you.
A Planetary Gear Electric motor from Ever-Power Products features one of our various types of DC motors in conjunction with among 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 over the planetary gear train allows for higher torque generation in comparison to among our spur equipment motors. In turn, an Ever-Power planetary equipment motor has the capacity to handle various load requirements; the more equipment stages (stacks), the bigger 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 Equipment Motors deliver exceptional torque result and efficiency in a concise, low noise style. These characteristics in addition to our value-added capabilities 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 Automobiles (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 program. This is one 
way planetary gears obtained their name.
The elements 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 driving sun pinion is definitely in the center of the ring equipment, and is coaxially arranged in relation to the output. The sun pinion is usually mounted on a clamping system in order to provide the mechanical connection to the electric motor shaft. During operation, the planetary gears, which are mounted 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 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 may also vary. As the amount of planetary gears improves, the distribution of the strain increases and then the torque which can be transmitted. Increasing the amount of tooth engagements also reduces the rolling power. Since only portion of the total result has to be transmitted as rolling power, a planetary equipment is incredibly efficient. The advantage of a planetary gear compared to an individual spur gear is based on this load distribution. Hence, it is possible 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 could be realized by different the amount of teeth of the sun gear and the amount of the teeth of the planetary gears. Small the sun gear, the greater the ratio. Technically, a meaningful ratio range for a planetary stage is definitely 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 a number of planetary levels in series in the same ring gear. In this instance, we speak of multi-stage gearboxes.
With planetary gearboxes the speeds and torques can be overlaid by having a band gear that’s not fixed but is driven in any direction of rotation. It is also possible to fix the drive shaft in order to grab the torque via the ring gear. Planetary gearboxes have become extremely important in many 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 transmission ratios may also easily be performed with planetary gearboxes. Because of the positive properties and compact 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 many 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 part of the gearbox
Possibility of 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 an engine or electrical motor needs the result speed reduced and/or torque increased, gears are commonly utilized to accomplish the desired result. Gear “reduction” particularly refers to the velocity of the rotary machine; the rotational swiftness of the rotary machine is “decreased” by dividing it by a gear ratio greater than 1:1. A gear ratio greater than 1:1 is definitely achieved when a smaller equipment (reduced size) with fewer quantity of tooth meshes and drives a more substantial gear with greater amount of teeth.
Gear reduction has the opposite effect 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 other applications gear reduction is used to improve quickness and reduce torque. Generators in wind generators use gear reduction in this manner to convert a relatively slow turbine blade velocity to a high speed capable of generating electricity. These applications use gearboxes that are assembled reverse 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-position worm gearboxes. In parallel shaft gearboxes (or reducers), a pinion gear with a specific number of the teeth meshes and drives a larger gear with a greater number of teeth. The “decrease” or gear ratio is usually calculated by dividing the number of the teeth on the large gear by the number of teeth on the small gear. For example, if a power motor drives a 13-tooth pinion equipment that meshes with a 65-tooth gear, a reduced amount 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 instances to 690 rpm. If the engine torque is usually 10 lb-in, the gearbox increases this torque by one factor of five to 50 lb-in (before subtracting out gearbox effectiveness losses).
Parallel shaft gearboxes often contain multiple gear models thereby increasing the apparatus reduction. The full total gear decrease (ratio) is determined by multiplying each individual gear ratio from each gear established stage. If a gearbox includes 3:1, 4:1 and 5:1 gear sets, the full 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 speed decreased to 57.5 rpm by utilizing a 60:1 gearbox. The 10 lb-in electric motor torque would be increased to 600 lb-in (before efficiency losses).
If a pinion equipment and its mating equipment have the same quantity of teeth, no decrease occurs and the apparatus ratio is 1:1. The gear is called an idler and its principal function is to change the direction of rotation instead of reduce the speed or boost the torque.
Calculating the gear ratio in a planetary equipment reducer is much less intuitive as it is dependent upon the amount of teeth of sunlight and band gears. The earth gears become idlers , nor affect the gear ratio. The planetary equipment ratio equals the sum of the amount of teeth on the sun and ring gear 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 units can achieve ratios from about 3:1 to about 11:1. If more equipment reduction is necessary, additional planetary stages may be used.
The gear decrease in a right-angle worm drive would depend 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 has 50 teeth, the resulting gear ratio is 25:1 (50 / 2 = 25).
When a rotary machine such as an engine or electric electric motor cannot provide the desired output velocity or torque, a gear reducer may provide a great choice. Parallel shaft, planetary, right-angle worm drives are common gearbox types for achieving gear reduction. Get in touch with Groschopp today with all your gear reduction questions.