epicyclic gearbox

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 external teeth on a concentric orbit. The circulation of the spur gear takes place in analogy to the orbiting of the planets in the solar system. 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 the majority of cases the casing is fixed. The generating sun pinion is certainly in the heart of the ring equipment, and is coaxially arranged with regards to the output. The sun pinion is usually mounted on a clamping system to be able to provide the mechanical connection to the electric motor shaft. During procedure, the planetary gears, which are installed on a planetary carrier, roll between your sun 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 mandatory torque. The amount of teeth does not have any effect on the transmission ratio of the gearbox. The number of planets may also vary. As the number of planetary gears raises, the distribution of the load increases and then the torque which can be transmitted. Raising the amount of tooth engagements also reduces the rolling power. Since only section of the total result needs to be transmitted as rolling power, a planetary equipment is extremely efficient. The benefit of a planetary equipment compared to an individual 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 varying the amount of teeth of the sun gear and the amount of teeth 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, because the planetary gears and the sun gear are extremely little above and below these ratios. Higher ratios can be obtained by connecting several planetary stages in series in the same ring gear. In this instance, we talk about multi-stage gearboxes.
With planetary gearboxes the speeds and torques can be overlaid by having a ring gear that is not set 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 ring gear. 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 should be transmitted with favorable mass inertia ratio adaptation. High tranny ratios may also easily be performed with planetary gearboxes. Because of their positive properties and small 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 many planetary gears
High efficiency because of low rolling power
Almost unlimited transmission ratio options because of combination of several planet stages
Suitable as planetary switching gear because of fixing this or that area of the gearbox
Possibility of use as overriding gearbox
Favorable volume output
Suitability for an array of applications
Epicyclic gearbox can be an automatic type gearbox in which parallel shafts and gears arrangement from manual equipment box are replaced with an increase of compact and more dependable sun and planetary kind of gears arrangement and also the manual clutch from manual power train is definitely replaced with hydro coupled clutch or torque convertor which in turn made the transmission automatic.
The idea of epicyclic gear box is extracted from the solar system which is known as to the perfect 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 solution 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 different load with minimal 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 answer for you.
A Planetary Gear Engine from Ever-Power Items 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 internal gear (sun equipment) that drives multiple external gears (planet gears) producing torque. Multiple contact points across the planetary gear teach allows for higher torque generation compared to one of 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 higher the load 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 Gear Motors deliver exceptional torque result and efficiency in a compact, low noise style. These characteristics furthermore to our value-added capabilities 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 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 system. This is how planetary gears acquired their name.
The components of a planetary gear train could be divided 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 certainly in the center of the ring equipment, and is coaxially organized with regards to the output. The sun pinion is usually mounted on a clamping system to be able to offer the mechanical connection to the engine shaft. During procedure, the planetary gears, which are installed on a planetary carrier, roll between your sun pinion and the ring gear. 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 has no effect on the transmitting ratio of the gearbox. The number of planets can also vary. As the number of planetary gears raises, the distribution of the load increases and therefore the torque which can be transmitted. Increasing the amount of tooth engagements also decreases the rolling power. Since only section of the total result has 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. Hence, it is feasible to transmit high torques wit
h high efficiency with a concise style using planetary gears.
Provided that the ring gear has a constant size, different ratios can be realized by varying the amount 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 definitely 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 phases 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 set but is driven in virtually any direction of rotation. Additionally it is possible to fix the drive shaft in order to grab the torque via the band equipment. Planetary gearboxes have grown to be extremely important in lots of regions of mechanical engineering.
They have become particularly well established 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 achieved with planetary gearboxes. Because of the positive properties and small design, the gearboxes possess many potential uses in commercial 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
Nearly unlimited transmission ratio options because of mixture of several planet stages
Suitable as planetary switching gear because of fixing this or that area of the gearbox
Chance for use as overriding gearbox
Favorable volume output
On the surface, it could appear that gears are being “reduced” in quantity or size, which is partially true. Whenever a rotary machine such as an engine or electric motor needs the result speed decreased 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 acceleration of the rotary machine is “decreased” by dividing it by a equipment ratio higher than 1:1. A gear ratio greater than 1:1 can be achieved when a smaller equipment (reduced size) with fewer number of teeth meshes and drives a larger gear with greater quantity of teeth.
Gear reduction gets the opposite effect on torque. The rotary machine’s output torque is increased by multiplying the torque by the apparatus ratio, less some effectiveness losses.
While in many applications gear reduction reduces speed and improves torque, in various 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 comparatively slow turbine blade quickness to a higher speed capable of producing electricity. These applications make use of gearboxes that are assembled opposite of these in applications that decrease quickness and increase torque.
How is gear decrease achieved? Many reducer types can handle attaining gear decrease including, but not limited to, parallel shaft, planetary and right-position worm gearboxes. In parallel shaft gearboxes (or reducers), a pinion gear with a certain number of the teeth meshes and drives a more substantial gear with a greater number of teeth. The “decrease” or equipment ratio is calculated by dividing the number of the teeth on the large equipment by the amount of teeth on the tiny gear. For example, if an electric 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 electrical motor speed is certainly 3,450 rpm, the gearbox reduces this speed by five situations to 690 rpm. If the electric motor torque can be 10 lb-in, the gearbox increases 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 units 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 sets, the full total ratio is 60:1 (3 x 4 x 5 = 60). In our example above, the 3,450 rpm electric engine would have its speed reduced to 57.5 rpm by utilizing a 60:1 gearbox. The 10 lb-in electric 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 reduction occurs and the apparatus ratio is 1:1. The apparatus is named an idler and its primary function is to improve the direction of rotation rather than decrease 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 number of teeth of the sun and ring gears. The planet gears act as idlers and don’t affect the gear ratio. The planetary gear ratio equals the sum of the amount of teeth on sunlight and ring gear 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 equipment ratio of 7:1 ([12 + 72]/12 = 7). Planetary gear pieces can achieve ratios from about 3:1 to about 11:1. If more gear reduction is needed, additional planetary stages can be used.
The gear reduction in a right-angle worm drive is dependent 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 provides 50 the teeth, the resulting equipment ratio is 25:1 (50 / 2 = 25).
Whenever a rotary machine such as an engine or electric electric motor cannot supply the desired output quickness or torque, a gear reducer may provide a great choice. Parallel shaft, planetary, right-position worm drives are normal gearbox types for achieving gear reduction. Get in touch with Groschopp today with all of your gear reduction questions.