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 equipment takes place in analogy to the orbiting of the planets in the solar system. This is one way planetary gears acquired their name.
The elements of a planetary gear train can be split 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 in the heart of the ring gear, and is coaxially organized in relation to the output. The sun pinion is usually attached to a clamping system in order to offer the mechanical connection to the motor shaft. During operation, the planetary gears, which are mounted on a planetary carrier, roll between your sunlight 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 amount 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 increases, the distribution of the strain increases and then the torque which 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 incredibly efficient. The advantage of a planetary gear 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.
Provided that the ring gear has a continuous size, different ratios could be realized by various the number of teeth of the sun gear and the amount of teeth of the planetary gears. Small the sun gear, the higher 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 several planetary stages in series in the same band gear. In this case, we speak of multi-stage gearboxes.
With planetary gearboxes the speeds and torques could be overlaid by having a band gear that’s not fixed 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 gear. Planetary gearboxes have grown to be extremely important in many areas 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 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 due to 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 area 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 in which parallel shafts and gears arrangement from manual equipment box are replaced with more compact and more reliable sun and planetary type of gears arrangement as well as the manual clutch from manual power train is usually replaced with hydro coupled clutch or torque convertor which in turn produced the transmission automatic.
The idea of epicyclic gear box is extracted from the solar system which is considered to the perfect arrangement of objects.
The epicyclic gearbox usually includes the P N R D S (Parking, Neutral, Reverse, Drive, Sport) settings which is obtained by fixing of sun and planetary gears according to the require of the drive.
Ever-Power Planetary Gear Motors are an inline answer providing high torque at low speeds. Our Planetary Gear Motors provide a high efficiency and provide excellent torque output in comparison with other types of gear motors. They can deal with a various load with reduced backlash and are best for intermittent duty operation. With endless reduction ratio choices, voltages, and sizes, Ever-Power Products includes a fully tailored gear motor answer for you.
A Planetary Gear Motor from Ever-Power Items features among our various types of DC motors in conjunction with one of our uniquely designed epicyclic or planetary gearheads. A planetary gearhead contains an interior gear (sun gear) that drives multiple external gears (planet gears) producing torque. Multiple contact factors over the planetary gear train allows for higher torque generation compared to among our spur gear motors. In turn, an Ever-Power planetary gear motor has the capacity to handle numerous 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
Applications
Our Planetary Gear Motors deliver exceptional torque output and performance in a compact, low noise style. These characteristics furthermore to our value-added features makes Ever-Power s gear 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 run between a gear with internal teeth and a gear with external 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 elements of a planetary gear train can be split 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 driving sun pinion can be in the center of the ring equipment, and is coaxially organized in relation to the output. The sun pinion is usually mounted on a clamping system in order to offer the mechanical connection to the engine shaft. During operation, 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 purpose of the planetary gears is to transfer the mandatory torque. The amount of teeth does not have any effect on the transmitting ratio of the gearbox. The amount of planets can also vary. As the amount of planetary gears boosts, the distribution of the load increases and then the torque that can be transmitted. Raising 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 gear is incredibly efficient. The benefit of a planetary gear compared to an individual spur gear is based on this load distribution. It is therefore possible 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 amount of teeth of the sun gear and the amount of tooth of the planetary gears. Small the sun gear, 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 the sun gear are extremely little above and below these ratios. Higher ratios can be obtained by connecting many planetary stages in series in the same ring gear. In this case, 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 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 more developed 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 performed with planetary gearboxes. Because of the 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 because of combination of several planet stages
Ideal 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 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 output speed reduced and/or torque improved, gears are commonly utilized to accomplish the required result. Gear “reduction” specifically refers to the rate of the rotary machine; the rotational swiftness of the rotary machine is usually “decreased” by dividing it by a gear ratio higher than 1:1. A gear ratio greater than 1:1 is usually achieved when a smaller equipment (decreased size) with fewer number of teeth meshes and drives a more substantial gear with greater number of teeth.
Gear reduction has the opposite influence on torque. The rotary machine’s result torque is improved by multiplying the torque by the gear ratio, less some efficiency losses.
While in many applications gear decrease reduces speed and boosts torque, in other applications gear decrease is used to increase acceleration and reduce torque. Generators in wind turbines use gear reduction in this fashion to convert a comparatively slow turbine blade swiftness to a high speed capable of generating electricity. These applications use gearboxes that are assembled opposite of those in applications that reduce quickness and increase torque.
How is gear reduction achieved? Many reducer types can handle attaining gear reduction 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 more substantial gear with a greater number of teeth. The “decrease” or gear ratio is usually calculated by dividing the number of tooth on the large gear by the number of teeth on the small gear. For instance, if an electric motor drives a 13-tooth pinion gear that meshes with a 65-tooth gear, a reduced amount of 5:1 is usually achieved (65 / 13 = 5). If the electrical motor speed is 3,450 rpm, the gearbox reduces this velocity by five situations to 690 rpm. If the motor torque is certainly 10 lb-in, the gearbox increases 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 decrease (ratio) is determined by multiplying each individual equipment ratio from each equipment established stage. If a gearbox contains 3:1, 4:1 and 5:1 gear sets, the total ratio is 60:1 (3 x 4 x 5 = 60). Inside our example above, the 3,450 rpm electric electric motor would have its speed reduced to 57.5 rpm by using a 60:1 gearbox. The 10 lb-in electric electric motor torque would be risen to 600 lb-in (before effectiveness losses).
If a pinion equipment and its mating gear have the same amount of teeth, no decrease occurs and the gear ratio is 1:1. The apparatus is named an idler and its own major function is to change the direction of rotation rather than reduce the speed or increase the torque.
Calculating the gear ratio in a planetary gear reducer is much less intuitive since it is dependent on the amount of teeth of the sun and ring gears. The earth gears act as idlers and don’t affect the apparatus ratio. The planetary gear ratio equals the sum of the amount of teeth on sunlight and ring equipment divided by the number of teeth on sunlight 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 sets 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 would depend on the number 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 provides 50 the teeth, the resulting gear ratio is 25:1 (50 / 2 = 25).
Whenever a rotary machine such as an engine or electric electric motor cannot supply the desired output speed or torque, a gear reducer may provide a great choice. Parallel shaft, planetary, right-angle worm drives are normal gearbox types for achieving gear reduction. Get in touch with Groschopp today with all your gear reduction questions.