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 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 obtained their name.
The components 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 housing is fixed. The traveling sun pinion is definitely in the heart of the ring equipment, and is coaxially arranged with regards to the output. Sunlight pinion is usually attached to 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 the sunlight 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 mandatory torque. The number of teeth has no effect on the transmission ratio of the gearbox. The amount of planets may also vary. As the amount of planetary gears boosts, the distribution of the strain increases and therefore the torque which can be transmitted. Raising the number of tooth engagements also decreases the rolling power. Since just portion of the total result needs to be transmitted as rolling power, a planetary equipment is extremely 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 concise style using planetary gears.
So long as the ring gear has a continuous size, different ratios could be realized by different the amount of teeth of the sun gear and the number of tooth of the planetary gears. Small the sun gear, the higher 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 a number of planetary levels in series in the same band gear. In this case, we speak of multi-stage gearboxes.
With planetary gearboxes the speeds and torques can be overlaid by having a ring gear that is not fixed but is driven in virtually any direction of rotation. Additionally it is possible to fix the drive shaft in order to pick up the torque via the band equipment. 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 should be transmitted with favorable mass inertia ratio adaptation. High tranny ratios can also easily be performed 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 many planetary gears
High efficiency due to low rolling power
Nearly unlimited transmission ratio options because of mixture of several planet stages
Ideal as planetary switching gear due to fixing this or that portion of the gearbox
Possibility of use as overriding gearbox
Favorable volume output
Suitability for a wide selection of applications
Epicyclic gearbox can be an automatic type gearbox in which parallel shafts and gears arrangement from manual equipment box are replaced with more compact and more reliable sun and planetary kind of gears arrangement and also the manual clutch from manual power train is replaced with hydro coupled clutch or torque convertor which in turn produced 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 comes with the P N R D S (Parking, Neutral, Invert, Drive, Sport) modes 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 solution providing high torque at low speeds. Our Planetary Gear Motors provide a high efficiency and provide excellent torque output when compared to other types of equipment motors. They can handle a different load with reduced backlash and are greatest for intermittent duty procedure. With endless decrease ratio options, voltages, and sizes, Ever-Power Products includes a fully tailored equipment motor option for you.
A Planetary Gear Electric motor from Ever-Power Items features one of our numerous kinds of DC motors coupled with one of our uniquely designed epicyclic or planetary gearheads. A planetary gearhead contains an interior gear (sun equipment) that drives multiple outer gears (planet gears) generating torque. Multiple contact points across the planetary gear train allows for higher torque generation in comparison to one of our spur equipment motors. Subsequently, an Ever-Power planetary equipment motor has the ability to handle various load requirements; the more gear stages (stacks), the higher the strain distribution and torque transmitting.
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 output and efficiency in a concise, low noise design. These characteristics in addition 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 Vehicles (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 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 known as a ring gear. In the majority of cases the casing is fixed. The traveling sun pinion is certainly 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 offer the mechanical link with the electric motor 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 purpose of the planetary gears is to transfer the mandatory torque. The number of teeth does not have any effect on the tranny ratio of the gearbox. The amount of planets may 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 decreases the rolling power. Since just area of the total result has to be transmitted as rolling power, a planetary gear is incredibly efficient. The advantage of a planetary equipment 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 design 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 sunlight gear and the number of tooth of the planetary gears. The smaller the sun gear, the higher 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 levels in series in the same band gear. In this case, 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. It is also possible to repair the drive shaft in order to pick up the torque via the ring equipment. 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 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 many planetary gears
High efficiency because of 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 part of the gearbox
Possibility of 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 for example an engine or electrical motor needs the result speed reduced and/or torque improved, gears are commonly utilized to accomplish the required result. Gear “reduction” particularly refers to the speed of the rotary machine; the rotational velocity of the rotary machine is definitely “decreased” by dividing it by a gear ratio higher than 1:1. A gear ratio greater than 1:1 can be achieved whenever a smaller equipment (decreased size) with fewer quantity of the teeth meshes and drives a more substantial gear with greater number of teeth.
Gear reduction has the opposite effect on torque. The rotary machine's output torque is increased by multiplying the torque by the gear ratio, less some performance losses.
While in lots of applications gear reduction reduces speed and raises torque, in additional applications gear decrease is used to improve speed and reduce torque. Generators in wind turbines use gear reduction in this manner to convert a comparatively slow turbine blade swiftness to a high speed capable of generating electricity. These applications make use of gearboxes that are assembled opposite of these in applications that reduce swiftness and increase torque.
How is gear decrease achieved? Many reducer types can handle attaining gear reduction 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 teeth meshes and drives a more substantial gear with a greater number of teeth. The “decrease” or equipment ratio is usually calculated by dividing the number of the teeth on the large gear by the number of teeth on the tiny gear. For example, if an electric motor drives a 13-tooth pinion gear that meshes with a 65-tooth gear, a reduced amount of 5:1 is definitely achieved (65 / 13 = 5). If the electric motor speed is definitely 3,450 rpm, the gearbox reduces this swiftness by five times to 690 rpm. If the electric motor torque is 10 lb-in, the gearbox boosts this torque by one factor of five to 50 lb-in (before subtracting out gearbox efficiency losses).
Parallel shaft gearboxes many times contain multiple gear sets thereby increasing the apparatus reduction. The total gear reduction (ratio) depends upon multiplying each individual gear ratio from each equipment arranged stage. If a gearbox consists of 3:1, 4:1 and 5:1 gear pieces, 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 acceleration decreased to 57.5 rpm by utilizing a 60:1 gearbox. The 10 lb-in electric electric motor torque would be increased to 600 lb-in (before performance losses).
If a pinion gear and its mating gear have the same amount of teeth, no decrease occurs and the apparatus ratio is 1:1. The gear is called an idler and its main function is to change the direction of rotation instead of decrease the speed or raise the torque.
Calculating the apparatus ratio in a planetary equipment reducer is less intuitive as it is dependent on the number of teeth of sunlight and band gears. The earth gears become idlers and do not affect the gear ratio. The planetary equipment ratio equals the sum of the number of teeth on the sun and ring equipment 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 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 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 starts and the mating worm wheel has 50 tooth, 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 acceleration or torque, a equipment reducer may provide a good solution. Parallel shaft, planetary, right-angle worm drives are normal gearbox types for attaining gear reduction. Get in touch with Groschopp today with all your gear reduction questions.