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 equipment occurs in analogy to the orbiting of the planets in the solar system. This is one way planetary gears acquired their name.
The components of a planetary gear train can 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 traveling sun pinion can be in the heart of the ring gear, and is coaxially arranged in relation to the output. The sun pinion is usually mounted on a clamping system to be able to offer the mechanical connection to the electric motor shaft. During operation, the planetary gears, which are mounted 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 purpose of the planetary gears is to transfer the mandatory torque. The amount of teeth has no effect on the tranny 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 then the torque that can be transmitted. Raising the number of tooth engagements also reduces the rolling power. Since only section of the total result has to be transmitted as rolling power, a planetary equipment is incredibly efficient. The advantage of a planetary equipment compared to a single spur gear lies in this load distribution. Hence, it is possible to transmit high torques wit
h high efficiency with a concise design using planetary gears.
So long as the ring gear includes a continuous size, different ratios can be realized by different the amount of teeth of sunlight gear and the amount of teeth of the planetary gears. The smaller the sun gear, 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 the sun gear are extremely small above and below these ratios. Higher ratios can be acquired by connecting several planetary stages in series in the same ring gear. In this instance, we speak of multi-stage gearboxes.
With planetary gearboxes the speeds and torques can be overlaid by having a band 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 pick up the torque via the ring equipment. Planetary gearboxes have grown to be extremely important in many 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 transmitting ratios may also easily be achieved with planetary gearboxes. Because of the positive properties and compact 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 due to low rolling power
Almost unlimited transmission ratio options because of combination of several planet stages
Ideal as planetary switching gear because of fixing this or that area of the gearbox
Chance for 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 set up from manual equipment box are replaced with an increase of compact and more dependable sun and planetary type of gears arrangement and also the manual clutch from manual power teach is certainly replaced with hydro coupled clutch or torque convertor which produced the transmission automatic.
The idea 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 based on 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 in comparison with other types of gear motors. They can manage a different load with reduced backlash and are best for intermittent duty operation. With endless decrease ratio choices, voltages, and sizes, Ever-Power Products has a fully tailored equipment motor option for you.
A Planetary Gear Engine from Ever-Power Items features among our numerous kinds of DC motors in conjunction with one of our uniquely designed epicyclic or planetary gearheads. A planetary gearhead consists of an interior gear (sun gear) that drives multiple outer gears (planet gears) producing torque. Multiple contact points over the planetary gear train permits higher torque generation in comparison to among our spur equipment motors. In turn, an Ever-Power planetary equipment motor has the capacity to handle various load requirements; the more equipment 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 Equipment Motors deliver exceptional torque result and efficiency in a compact, low noise design. These characteristics furthermore to our value-added capabilities makes Ever-Power s equipment motors a great choice for all movement 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 external teeth on a concentric orbit. The circulation of the spur equipment occurs in analogy to the orbiting of the planets in the solar program. This is one way planetary gears obtained their name.
The parts 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 housing 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 attached to a clamping system to be able to offer the mechanical connection to the electric motor shaft. During procedure, the planetary gears, which are mounted on a planetary carrier, roll between the 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 amount of teeth does not have any effect on the tranny 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 number of tooth engagements also reduces the rolling power. Since just section of the total output has to be transmitted as rolling power, a planetary equipment is incredibly 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 compact 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 teeth of the planetary gears. The smaller 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 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 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 fix the drive shaft in order to grab the torque via the band gear. Planetary gearboxes have grown to be extremely important in lots of areas 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 transmitting ratios can also easily be performed with planetary gearboxes. Because of the positive properties and compact design, the gearboxes possess many potential uses in industrial 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 due to mixture of several planet stages
Appropriate as planetary switching gear due to fixing this or that area 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. When a rotary machine such as for example an engine or electric motor needs the result speed decreased and/or torque improved, gears are commonly used to accomplish the required result. Gear “reduction” particularly refers to the quickness of the rotary machine; the rotational swiftness of the rotary machine is usually “reduced” by dividing it by a gear ratio greater than 1:1. A gear ratio higher than 1:1 is certainly achieved when a smaller gear (decreased size) with fewer number of teeth meshes and drives a larger gear with greater quantity of teeth.
Gear reduction has the opposite effect on torque. The rotary machine’s result 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 other applications gear reduction is used to improve acceleration and reduce torque. Generators in wind turbines use gear decrease in this manner to convert a relatively slow turbine blade acceleration to a higher speed capable of producing electricity. These applications use gearboxes that are assembled opposing of those in applications that decrease velocity and increase torque.
How is gear decrease achieved? Many reducer types are capable of attaining gear reduction including, but not limited to, parallel shaft, planetary and right-position worm gearboxes. In parallel shaft gearboxes (or reducers), a pinion gear with a specific number of tooth meshes and drives a more substantial gear with a lot more teeth. The “decrease” or equipment ratio is usually calculated by dividing the amount of the teeth on the large equipment by the amount of teeth on the small gear. For example, if a power motor drives a 13-tooth pinion equipment that meshes with a 65-tooth equipment, a reduced amount of 5:1 is achieved (65 / 13 = 5). If the electric motor speed is certainly 3,450 rpm, the gearbox reduces this acceleration by five instances to 690 rpm. If the engine torque is definitely 10 lb-in, the gearbox boosts this torque by a factor of five to 50 lb-in (before subtracting out gearbox effectiveness losses).
Parallel shaft gearboxes often contain multiple gear pieces thereby increasing the gear reduction. The total gear decrease (ratio) is determined by multiplying each individual equipment ratio from each gear established 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). Inside our example above, the 3,450 rpm electric engine would have its swiftness decreased 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 number of teeth, no decrease occurs and the gear ratio is 1:1. The gear is named an idler and its principal function is to change the path of rotation instead of reduce the speed or boost the torque.
Calculating the gear ratio in a planetary equipment reducer is much less intuitive as it is dependent upon the number of teeth of the sun and ring gears. The planet gears become idlers and don’t affect the gear ratio. The planetary gear ratio equals the sum of the number of teeth on sunlight and ring gear divided by the amount of teeth on the sun gear. For instance, 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 units can perform ratios from about 3:1 to about 11:1. If more equipment reduction is necessary, additional planetary stages may be used.
The gear decrease 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 tooth, the resulting equipment ratio is 25:1 (50 / 2 = 25).
Whenever a rotary machine such as for example an engine or electric electric motor cannot provide the desired output swiftness or torque, a gear reducer may provide a good solution. 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.