epicyclic gearbox

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 exterior 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 how 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 actually a ring gear. In nearly all cases the housing is fixed. The driving sun pinion is definitely in the heart of the ring gear, and is coaxially arranged with regards to the output. Sunlight pinion is usually mounted on a clamping system to be able 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 result 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 transmission 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 that can be transmitted. Increasing the amount of tooth engagements also reduces the rolling power. Since just area of the total result needs to be transmitted as rolling power, a planetary gear is incredibly efficient. The benefit of a planetary gear 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 style using planetary gears.
Provided that the ring gear includes a constant size, different ratios can be realized by varying the amount 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 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 many planetary stages in series in the same band 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 fixed but is driven in virtually any direction of rotation. It is also possible to fix the drive shaft to be able to grab the torque via the band equipment. Planetary gearboxes have grown to be extremely important in lots of areas of mechanical engineering.
They have grown to be particularly more developed 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 commercial 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 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 a wide range of applications
Epicyclic gearbox is an automatic type gearbox in which parallel shafts and gears arrangement from manual equipment 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 definitely 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 comes with 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 require of the drive.
Ever-Power Planetary Gear Motors are an inline option providing high torque in low speeds. Our Planetary Gear Motors provide a high efficiency and provide excellent torque output in comparison with other types of equipment motors. They can deal with a various load with minimal backlash and are greatest for intermittent duty operation. With endless decrease ratio options, voltages, and sizes, Ever-Power Products has a fully tailored gear motor alternative for you.
A Planetary Gear Motor from Ever-Power Products features among our various types of DC motors coupled with one of 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 factors across the planetary gear teach permits higher torque generation in comparison to among our spur gear motors. In turn, an Ever-Power planetary gear motor has the capacity to handle various 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
Capability to Handle Large Reduction Ratios
High Power Density
Applications
Our Planetary Equipment 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 fantastic 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 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 acquired 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 the majority of cases the casing is fixed. The generating sun pinion is certainly in the center of the ring gear, and is coaxially arranged in relation to the output. Sunlight pinion is usually mounted on a clamping system to be able to offer the mechanical connection to the motor shaft. During procedure, 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 mandatory torque. The number of teeth does not have any effect on the transmitting ratio of the gearbox. The number of planets may also vary. As the number of planetary gears increases, the distribution of the load increases and then the torque that can be transmitted. Increasing the number of tooth engagements also decreases the rolling power. Since just portion of the total output needs to be transmitted as rolling power, a planetary equipment is incredibly efficient. The benefit of a planetary gear compared to a single spur gear is based on this load distribution. Hence, it is feasible to transmit high torques wit
h high efficiency with a compact design using planetary gears.
So long as the ring gear includes a constant size, different ratios could be realized by various the number of teeth of sunlight 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 is approx. 3:1 to 10:1, since the planetary gears and the sun gear are extremely little above and below these ratios. Higher ratios can be obtained by connecting several planetary phases in series in the same band gear. In this instance, we talk about 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 band 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 transmission ratios may also easily be achieved with planetary gearboxes. Because of the positive properties and compact design, the gearboxes have many potential uses in commercial 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 part 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 electrical motor needs the output speed decreased and/or torque increased, gears are commonly used to accomplish the desired result. Gear “reduction” particularly refers to the swiftness of the rotary machine; the rotational velocity of the rotary machine is usually “reduced” by dividing it by a equipment ratio higher than 1:1. A gear ratio higher than 1:1 can be achieved whenever a smaller gear (decreased size) with fewer amount of teeth meshes and drives a more substantial 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 gear ratio, less some effectiveness losses.
While in many applications gear reduction reduces speed and improves torque, in additional applications gear decrease is used to improve acceleration and reduce torque. Generators in wind generators use gear reduction in this fashion to convert a comparatively slow turbine blade rate to a high speed capable of generating electricity. These applications use gearboxes that are assembled reverse of these in applications that reduce quickness 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 equipment with a specific number of the teeth meshes and drives a larger gear with a greater number of teeth. The “reduction” or gear ratio is usually calculated by dividing the number of the 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 equipment that meshes with a 65-tooth gear, a reduction of 5:1 is achieved (65 / 13 = 5). If the electric motor speed is definitely 3,450 rpm, the gearbox reduces this swiftness by five instances to 690 rpm. If the motor torque is certainly 10 lb-in, the gearbox improves this torque by one factor of five to 50 lb-in (before subtracting out gearbox efficiency losses).
Parallel shaft gearboxes often contain multiple gear models thereby increasing the apparatus reduction. The total gear decrease (ratio) depends upon multiplying each individual equipment ratio from each equipment set stage. If a gearbox includes 3:1, 4:1 and 5:1 gear units, the full total ratio is 60:1 (3 x 4 x 5 = 60). In our example above, the 3,450 rpm electric motor would have its speed decreased 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 gear have the same number 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 improve the path of rotation instead of reduce the speed or increase the torque.
Calculating the gear ratio in a planetary gear reducer is much less intuitive as it is dependent on the amount of teeth of the sun and band gears. The earth gears become idlers , nor 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 sunlight gear. For example, a planetary established with a 12-tooth sun gear and 72-tooth ring gear has a gear ratio of 7:1 ([12 + 72]/12 = 7). Planetary gear pieces can perform ratios from about 3:1 to about 11:1. If more equipment reduction is needed, 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 number of teeth on the mating worm wheel. If the worm has two begins and the mating worm wheel has 50 the teeth, the resulting equipment ratio is 25:1 (50 / 2 = 25).
Whenever a rotary machine such as an engine or electric motor cannot provide the desired output velocity or torque, a equipment reducer may provide a great choice. Parallel shaft, planetary, right-position worm drives are normal gearbox types for achieving gear reduction. Contact Groschopp today with all of your gear reduction questions.