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 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 generating sun pinion is definitely in the heart of the ring equipment, 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 link with 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 result 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 amount of planets may also vary. As the number of planetary gears raises, the distribution of the strain increases and therefore the torque that can be transmitted. Increasing the amount of tooth engagements also decreases the rolling power. Since only portion of the total result needs to be transmitted as rolling power, a planetary gear is extremely efficient. The advantage of a planetary gear compared to a single 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 has a continuous size, different ratios can be realized by different the number of teeth of sunlight gear and the number of teeth of the planetary gears. Small the sun equipment, the higher the ratio. Technically, a meaningful ratio range for a planetary stage is usually 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 obtained by connecting many planetary levels in series in the same band gear. In this instance, we speak of multi-stage gearboxes.
With planetary gearboxes the speeds and torques could be overlaid by having a ring gear that is not fixed 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 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 must be transmitted with favorable mass inertia ratio adaptation. High transmission ratios may also easily be performed with planetary gearboxes. Because of their positive properties and small design, the gearboxes possess many potential uses in industrial 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 combination of several planet stages
Suitable as planetary switching gear due to 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 set up from manual equipment box are replaced with an increase of compact and more dependable sun and planetary type of gears arrangement as well as 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 thought of epicyclic gear box is extracted from the solar system which is considered to an ideal arrangement of objects.
The epicyclic gearbox usually includes the P N R D S (Parking, Neutral, Invert, Drive, Sport) settings 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 in low speeds. Our Planetary Gear Motors offer a high efficiency and provide excellent torque output when compared to other types of equipment 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 equipment motor option for you.
A Planetary Gear Motor from Ever-Power Products features among our various types of DC motors coupled with among our uniquely designed epicyclic or planetary gearheads. A planetary gearhead contains an internal gear (sun gear) that drives multiple outer gears (planet gears) producing torque. Multiple contact factors over the planetary gear teach allows for higher torque generation compared to one of our spur gear motors. In turn, an Ever-Power planetary equipment motor has the ability to handle numerous load requirements; the more gear stages (stacks), the bigger the strain distribution and torque transmission.
Features and Benefits
High Torque Capabilities
Sleek Inline Design
High Efficiency
Ability to Handle Large Reduction Ratios
High Power Density
Applications
Our Planetary Equipment Motors deliver exceptional torque result and performance in a concise, low noise design. 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 Vehicles (AGV)
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 takes place 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 split 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 traveling sun pinion is in the center of the ring gear, and is coaxially organized with regards to the output. Sunlight pinion is usually mounted on a clamping system in order to provide the mechanical connection to the electric motor shaft. During procedure, the planetary gears, which are installed on a planetary carrier, roll between the sunlight 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 number of teeth has no effect on the transmitting ratio of the gearbox. The amount of planets can also vary. As the amount of planetary gears increases, the distribution of the strain increases and therefore the torque which can be transmitted. Increasing the amount of tooth engagements also decreases the rolling power. Since just part 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 is based on this load distribution. Hence, it is 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 number of teeth of the planetary gears. Small 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 little above and below these ratios. Higher ratios can be acquired by connecting several planetary levels 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 band gear that is 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 band equipment. Planetary gearboxes have become extremely important in many regions of mechanical engineering.
They have grown to be particularly more developed in areas where high output levels and fast speeds should be transmitted with favorable mass inertia ratio adaptation. High transmission ratios can also easily be performed with planetary gearboxes. Because of their positive properties and compact 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 because of combination of several planet stages
Suitable as planetary switching gear due to 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. Whenever a rotary machine such as for example an engine or electrical motor needs the output speed reduced and/or torque improved, gears are commonly used to accomplish the required result. Gear “reduction” specifically refers to the acceleration of the rotary machine; the rotational speed of the rotary machine is usually “decreased” by dividing it by a equipment ratio higher than 1:1. A gear ratio greater than 1:1 is achieved when a smaller gear (reduced size) with fewer amount of the teeth meshes and drives a more substantial gear with greater quantity of teeth.
Gear reduction has the opposite influence on torque. The rotary machine’s output torque is increased by multiplying the torque by the gear ratio, less some performance losses.
While in many applications gear reduction reduces speed and boosts torque, in other applications gear reduction is used to increase rate and reduce torque. Generators in wind turbines use gear reduction in this manner to convert a comparatively slow turbine blade velocity to a high speed capable of producing electricity. These applications make use of gearboxes that are assembled opposite of these in applications that decrease speed 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 gear with a certain number of teeth meshes and drives a larger gear with a greater number of teeth. The “decrease” or gear ratio can be calculated by dividing the amount of the teeth on the large equipment by the amount of teeth on the small gear. For instance, if a power motor drives a 13-tooth pinion equipment that meshes with a 65-tooth gear, a reduced amount of 5:1 is definitely achieved (65 / 13 = 5). If the electrical motor speed is usually 3,450 rpm, the gearbox reduces this acceleration by five situations to 690 rpm. If the electric motor torque can be 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 models thereby increasing the gear reduction. The total gear reduction (ratio) depends upon multiplying each individual gear ratio from each gear arranged stage. If a gearbox consists of 3:1, 4:1 and 5:1 gear units, 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 quickness decreased to 57.5 rpm by using a 60:1 gearbox. The 10 lb-in electric engine torque would be risen to 600 lb-in (before efficiency losses).
If a pinion gear and its mating equipment have the same amount of teeth, no reduction occurs and the gear ratio is 1:1. The gear is named an idler and its own principal function is to improve the direction of rotation rather than decrease the speed or increase the torque.
Calculating the gear ratio in a planetary equipment reducer is less intuitive as it is dependent on the amount of teeth of sunlight and ring gears. The planet gears become idlers , nor affect the apparatus ratio. The planetary equipment ratio equals the sum of the number of teeth on sunlight and ring equipment divided by the amount of teeth on sunlight gear. For example, a planetary set with a 12-tooth sun gear and 72-tooth ring gear includes a equipment ratio of 7:1 ([12 + 72]/12 = 7). Planetary gear models can perform ratios from about 3:1 to about 11:1. If more gear 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 amount of teeth on the mating worm wheel. If the worm has two begins and the mating worm wheel has 50 tooth, 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 swiftness or torque, a equipment 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 of your gear reduction questions.