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 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 known as a ring gear. In the majority of cases the housing is fixed. The traveling sun pinion is in the center 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 offer the mechanical connection to the motor shaft. During procedure, the planetary gears, which are installed on a planetary carrier, roll between your sunlight 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 mandatory torque. The number of teeth has no effect on the tranny ratio of the gearbox. The amount of planets may also vary. As the amount of planetary gears boosts, 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 only area of the total result needs to be transmitted as rolling power, a planetary gear is incredibly efficient. The benefit of a planetary equipment compared to a single spur gear is based on this load distribution. It is therefore possible to transmit high torques wit
h high efficiency with a concise design 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 sunlight gear and the number of the teeth 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, since the planetary gears and the sun gear are extremely little above and below these ratios. Higher ratios can be acquired by connecting a number of planetary stages 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 ring gear that’s not fixed but is driven in any direction of rotation. Additionally it is possible to fix the drive shaft to be able to pick up the torque via the ring gear. Planetary gearboxes have become extremely important in lots of regions 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 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 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
Nearly unlimited transmission ratio options due to mixture of several planet stages
Suitable as planetary switching gear due to fixing this or that part of the gearbox
Chance for use as overriding gearbox
Favorable volume output
Suitability for a wide range of applications
Epicyclic gearbox can be an automatic type gearbox where parallel shafts and gears arrangement from manual gear 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 certainly replaced with hydro coupled clutch or torque convertor which in turn produced the transmission automatic.
The idea of epicyclic gear box is taken from the solar system which is considered to the perfect arrangement of objects.
The epicyclic gearbox usually comes with 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 need of the drive.
Ever-Power Planetary Equipment Motors are an inline alternative providing high torque at low speeds. Our Planetary Gear Motors offer a high efficiency and provide excellent torque output in comparison with other types of gear motors. They can deal with a different load with reduced backlash and are best for intermittent duty operation. With endless decrease ratio choices, voltages, and sizes, Ever-Power Products includes a fully tailored gear motor solution for you.
A Planetary Gear Motor from Ever-Power Products features one of our numerous kinds of DC motors coupled with one of our uniquely designed epicyclic or planetary gearheads. A planetary gearhead includes an internal gear (sun gear) that drives multiple outer gears (planet gears) generating torque. Multiple contact points across the planetary gear teach allows for higher torque generation in comparison to among our spur gear motors. In turn, an Ever-Power planetary gear motor has the ability to handle various load requirements; the more gear stages (stacks), the bigger the load distribution and torque transmission.
Features and Benefits
High Torque Capabilities
Sleek Inline Design
High Efficiency
Capability to Handle Large Reduction Ratios
High Power Density
Applikationer
Our Planetary Equipment Motors deliver exceptional torque output and effectiveness in a concise, low noise design. These characteristics furthermore 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 Vehicles (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 occurs in analogy to the orbiting of the planets in the solar system. 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 known as a ring gear. In nearly all cases the casing is fixed. The generating sun pinion is usually in the center of the ring equipment, and is coaxially organized with regards to the output. Sunlight pinion is usually mounted on a clamping system in order to offer the mechanical link with the engine shaft. During operation, the planetary gears, which are mounted on a planetary carrier, roll between your sun pinion and the ring gear. 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 number of teeth has no 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 strain increases and then the torque that can be transmitted. Raising the amount of tooth engagements also reduces the rolling power. Since just portion 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 a single spur gear lies in this load distribution. It is therefore possible 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 can be realized by various the amount of teeth of the sun gear and the amount of teeth of the planetary gears. The smaller the sun gear, 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 obtained by connecting a number of planetary stages 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 ring gear that is not set but is driven in virtually any direction of rotation. Additionally it is possible to repair the drive shaft to be able to grab the torque via the band gear. Planetary gearboxes have grown to be 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 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 several planetary gears
High efficiency because of low rolling power
Nearly unlimited transmission ratio options because of combination of several planet stages
Appropriate as planetary switching gear because of fixing this or that area of the gearbox
Possibility of use as overriding gearbox
Favorable volume output
On the surface, it could 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 electric motor needs the result speed decreased and/or torque improved, gears are commonly used to accomplish the required result. Gear “reduction” particularly refers to the swiftness of the rotary machine; the rotational speed of the rotary machine is certainly “reduced” by dividing it by a equipment ratio greater than 1:1. A gear ratio greater than 1:1 is achieved when a smaller equipment (decreased size) with fewer quantity of teeth meshes and drives a larger gear with greater amount of teeth.
Gear reduction gets the opposite effect on torque. The rotary machine’s output torque is improved by multiplying the torque by the gear ratio, less some effectiveness losses.
While in lots of applications gear reduction reduces speed and improves torque, in other applications gear reduction is used to increase velocity and reduce torque. Generators in wind generators use gear decrease in this fashion to convert a relatively slow turbine blade swiftness to a higher speed capable of generating electricity. These applications use gearboxes that are assembled opposite of these in applications that reduce swiftness and increase torque.
How is gear decrease 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 equipment with a certain number of teeth meshes and drives a larger gear with a lot more teeth. The “reduction” or equipment ratio can be calculated by dividing the number of tooth 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 reduced amount of 5:1 is achieved (65 / 13 = 5). If the electric motor speed is usually 3,450 rpm, the gearbox reduces this speed by five instances to 690 rpm. If the motor torque is usually 10 lb-in, the gearbox raises this torque by a factor of five to 50 lb-in (before subtracting out gearbox effectiveness losses).
Parallel shaft gearboxes often contain multiple gear sets thereby increasing the gear reduction. The total gear decrease (ratio) is determined by multiplying each individual equipment ratio from each equipment arranged stage. If a gearbox contains 3:1, 4:1 and 5:1 gear units, the full total ratio is 60:1 (3 x 4 x 5 = 60). Inside our example above, the 3,450 rpm electric engine would have its velocity reduced to 57.5 rpm by using a 60:1 gearbox. The 10 lb-in electric motor torque would be increased to 600 lb-in (before performance losses).
If a pinion gear and its mating gear have the same quantity of teeth, no reduction occurs and the gear ratio is 1:1. The gear is called an idler and its primary function is to improve the direction of rotation instead of reduce the speed or increase the torque.
Calculating the gear ratio in a planetary gear reducer is less intuitive as it is dependent on the amount of teeth of the sun and ring gears. The earth gears become idlers and don’t affect the apparatus ratio. The planetary equipment ratio equals the sum of the number of teeth on sunlight and ring gear divided by the amount of teeth on the sun gear. For example, a planetary set 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 equipment reduction is needed, 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 starts and the mating worm wheel provides 50 the teeth, the resulting equipment ratio is 25:1 (50 / 2 = 25).
When a rotary machine such as an engine or electric engine cannot supply the desired output acceleration or torque, a equipment reducer may provide a great choice. Parallel shaft, planetary, right-angle worm drives are normal gearbox types for attaining gear reduction. Contact Groschopp today with all your gear reduction questions.