epicyclic gearbox

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 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 how planetary gears acquired their name.
The components 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 casing is fixed. The traveling sun pinion can be in the heart of the ring gear, and is coaxially organized with regards to the output. Sunlight pinion is usually mounted on a clamping system to be able to offer the mechanical connection to the engine shaft. During operation, 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 does not have any effect on the tranny ratio of the gearbox. The amount of planets can also vary. As the number of planetary gears raises, the distribution of the load increases and therefore the torque that can be transmitted. Increasing the amount of tooth engagements also reduces the rolling power. Since just portion of the total result has to be transmitted as rolling power, a planetary equipment is extremely efficient. The advantage of a planetary gear compared to a single spur gear lies in this load distribution. Hence, it is feasible 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 varying the number of teeth of the sun gear and the number of tooth of the planetary gears. Small 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 small above and below these ratios. Higher ratios can be acquired by connecting many planetary levels in series in the same ring gear. In cases like this, 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 pick up 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 must 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 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
Almost unlimited transmission ratio options due to combination of several planet stages
Ideal as planetary switching gear due to fixing this or that section of the gearbox
Chance for 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 equipment box are replaced with an increase of compact and more reliable sun and planetary kind of gears arrangement as well as the manual clutch from manual power teach is replaced with hydro coupled clutch or torque convertor which made the transmission automatic.
The thought 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 according to the need of the drive.
Ever-Power Planetary Gear Motors are an inline remedy 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 equipment motors. They can deal with a varying load with minimal backlash and are best for intermittent duty operation. With endless decrease ratio options, voltages, and sizes, Ever-Power Products includes a fully tailored equipment motor answer for you.
A Planetary Gear Motor from Ever-Power Items features one of our various types of DC motors in conjunction with among our uniquely designed epicyclic or planetary gearheads. A planetary gearhead consists of an internal gear (sun gear) that drives multiple external gears (planet gears) generating torque. Multiple contact factors over the planetary gear train allows for higher torque generation compared to one of our spur gear motors. Subsequently, an Ever-Power planetary gear motor has the ability to handle various load requirements; the more equipment 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 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)
Within 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 takes place 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 split 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 driving sun pinion is usually in the center of the ring equipment, and is coaxially organized with regards to the output. Sunlight pinion is usually attached to a clamping system in order to provide the mechanical link with the engine 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 output shaft of the gearbox.
The sole reason for the planetary gears is to transfer the required 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 boosts, the distribution of the load increases and therefore the torque which can be transmitted. Raising the amount of tooth engagements also decreases the rolling power. Since just area of the total output needs to be transmitted as rolling power, a planetary equipment is extremely efficient. The benefit 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 compact style using planetary gears.
So long as the ring gear has a constant size, different ratios could be realized by various the number of teeth of the sun gear and the number of the teeth of the planetary gears. Small 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 sunlight 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 talk about multi-stage gearboxes.
With planetary gearboxes the speeds and torques could be overlaid by having a ring gear that’s not fixed 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 regions 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 transmission ratios can also easily be achieved with planetary gearboxes. Because of their 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 due to mixture of several planet stages
Appropriate as planetary switching gear due to fixing this or that section of the gearbox
Possibility of use as overriding gearbox
Favorable volume output
On the surface, it may appear 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 output speed decreased and/or torque improved, gears are commonly utilized to accomplish the desired result. Gear “reduction” specifically refers to the speed of the rotary machine; the rotational velocity of the rotary machine is definitely “decreased” by dividing it by a equipment ratio greater than 1:1. A gear ratio greater than 1:1 is achieved when a smaller gear (decreased size) with fewer amount of the teeth meshes and drives a larger gear with greater amount of teeth.
Gear reduction gets the opposite influence on torque. The rotary machine’s output torque is increased by multiplying the torque by the apparatus ratio, less some effectiveness losses.
While in lots of applications gear decrease reduces speed and raises torque, in other applications gear decrease is used to increase speed and reduce torque. Generators in wind generators use gear reduction in this manner to convert a relatively slow turbine blade speed to a higher speed capable of producing electricity. These applications use gearboxes that are assembled reverse of these in applications that reduce swiftness and increase torque.
How is gear reduction achieved? Many reducer types can handle attaining gear decrease including, but not limited to, parallel shaft, planetary and right-angle worm gearboxes. In parallel shaft gearboxes (or reducers), a pinion gear with a specific 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 amount of the teeth on the large equipment 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 equipment, a reduction of 5:1 can be achieved (65 / 13 = 5). If the electric motor speed is definitely 3,450 rpm, the gearbox reduces this quickness by five moments to 690 rpm. If the engine torque is 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 many times contain multiple gear sets thereby increasing the gear reduction. The total gear decrease (ratio) depends upon multiplying each individual equipment ratio from each gear arranged stage. If a gearbox consists of 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 electric motor would have its acceleration reduced to 57.5 rpm by using a 60:1 gearbox. The 10 lb-in electric electric motor torque would be increased to 600 lb-in (before efficiency losses).
If a pinion equipment and its mating equipment have the same number of teeth, no reduction occurs and the gear ratio is 1:1. The apparatus is called an idler and its own principal function is to change the direction of rotation rather than decrease the speed or increase the torque.
Calculating the apparatus ratio in a planetary gear reducer is less intuitive as it is dependent upon the amount of teeth of the sun and ring 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 the sun gear. For example, a planetary established with a 12-tooth sun gear and 72-tooth ring gear includes 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 gear 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 amount of teeth on the mating worm wheel. If the worm has two starts and the mating worm wheel offers 50 tooth, the resulting gear ratio is 25:1 (50 / 2 = 25).
When a rotary machine such as an engine or electric engine cannot supply the desired output swiftness or torque, a equipment reducer may provide a good solution. Parallel shaft, planetary, right-angle worm drives are common gearbox types for attaining gear reduction. Get in touch with Groschopp today with all of your gear reduction questions.