In 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 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 the majority of cases the housing is fixed. The traveling sun pinion is definitely in the heart of the ring gear, and is coaxially arranged in relation to the output. Sunlight pinion is usually mounted on a clamping system to be able to provide the mechanical connection to the motor shaft. During operation, the planetary gears, which are installed on a planetary carrier, roll between your 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 required torque. The amount of teeth has no effect on the transmission ratio of the gearbox. The number of planets may also vary. As the amount of planetary gears raises, the distribution of the load increases and therefore the torque which can be transmitted. Increasing the number 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 extremely efficient. The advantage of a planetary gear compared to a single spur gear lies in 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 can be realized by various the number of teeth of the sun gear and the number of teeth of the planetary gears. Small the sun gear, the greater the ratio. Technically, a meaningful ratio range for a planetary stage can be approx. 3:1 to 10:1, since the planetary gears and sunlight gear are extremely little above and below these ratios. Higher ratios can be acquired by connecting many 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 set but is driven in virtually 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 become extremely important in many areas of mechanical engineering.
They have become particularly well established 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 achieved with planetary gearboxes. Because of their positive properties and compact design, the gearboxes have many potential uses in industrial 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 because of mixture 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 gear box are replaced with an increase of 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 made 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 comes with 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 Equipment Motors are an inline solution 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 equipment motors. They can deal with a varying load with minimal backlash and are best for intermittent duty procedure. With endless reduction ratio options, voltages, and sizes, Ever-Power Products includes a fully tailored gear motor solution for you.
A Planetary Gear Electric motor from Ever-Power Items features among our numerous kinds of DC motors in conjunction with among our uniquely designed epicyclic or planetary gearheads. A planetary gearhead includes an internal gear (sun equipment) that drives multiple outer gears (planet gears) generating torque. Multiple contact points over the planetary gear teach permits higher torque generation in comparison to one of our spur gear motors. In turn, an Ever-Power planetary equipment motor has the capacity to handle numerous load requirements; the more gear stages (stacks), the bigger the strain distribution and torque transmitting.
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 effectiveness in a compact, low noise style. These characteristics in addition 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 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 occurs in analogy to the orbiting of the planets in the solar program. This is one way planetary gears acquired their name.
The elements of a planetary gear train can 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 generating sun pinion is usually in the center of the ring gear, and is coaxially organized with regards to the output. The sun pinion is usually attached to a clamping system to be able to provide the mechanical connection to the engine shaft. During operation, the planetary gears, which are installed on a planetary carrier, roll between the sun pinion and the ring gear. 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 does not have any effect on the tranny ratio of the gearbox. The amount of planets can also vary. As the number of planetary gears improves, the distribution of the load 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 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. It is therefore feasible to transmit high torques wit
h high efficiency with a compact design using planetary gears.
Provided that the ring gear includes a continuous size, different ratios can be realized by various the number of teeth of sunlight gear and the number of the 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, since the planetary gears and sunlight gear are extremely little above and below these ratios. Higher ratios can be obtained by connecting several planetary phases in series in the same band 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 is not fixed but is driven in virtually any direction of rotation. Additionally it is possible to repair the drive shaft in order to pick up the torque via the ring gear. Planetary gearboxes have become extremely important in lots of areas 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 can also easily be achieved with planetary gearboxes. Because of their positive properties and small design, the gearboxes have 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 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 section 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. Whenever a rotary machine such as an engine or electrical motor needs the result speed reduced and/or torque improved, gears are commonly used to accomplish the required result. Gear “reduction” specifically refers to the rate of the rotary machine; the rotational speed of the rotary machine is “decreased” by dividing it by a gear ratio greater than 1:1. A gear ratio higher than 1:1 is definitely achieved whenever a smaller equipment (decreased size) with fewer amount of teeth meshes and drives a larger gear with greater quantity of teeth.
Gear reduction gets the opposite influence on torque. The rotary machine’s output torque is improved by multiplying the torque by the apparatus ratio, less some performance losses.
While in many applications gear decrease reduces speed and improves torque, in other applications gear decrease is used to increase rate and reduce torque. Generators in wind turbines use gear reduction in this manner to convert a relatively slow turbine blade speed to a high speed capable of producing electricity. These applications use gearboxes that are assembled opposite of those in applications that reduce rate 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-position worm gearboxes. In parallel shaft gearboxes (or reducers), a pinion equipment 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 definitely calculated by dividing the number of teeth on the large equipment 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 reduction of 5:1 is usually achieved (65 / 13 = 5). If the electrical motor speed is definitely 3,450 rpm, the gearbox reduces this rate by five occasions 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 performance losses).
Parallel shaft gearboxes many times contain multiple gear pieces 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 contains 3:1, 4:1 and 5:1 gear pieces, the total ratio is 60:1 (3 x 4 x 5 = 60). In our example above, the 3,450 rpm electric electric motor would have its velocity reduced to 57.5 rpm by utilizing a 60:1 gearbox. The 10 lb-in electric engine torque would be risen to 600 lb-in (before performance losses).
If a pinion equipment and its mating equipment have the same quantity of teeth, no reduction occurs and the apparatus ratio is 1:1. The gear is called an idler and its major function is to improve the path of rotation instead of decrease the speed or boost the torque.
Calculating the gear ratio in a planetary equipment reducer is much less intuitive since it is dependent on the amount of teeth of sunlight and band gears. The planet gears become idlers , nor affect the apparatus ratio. The planetary gear ratio equals the sum of the amount of teeth on the sun and ring gear divided by the amount of teeth on the sun gear. For instance, a planetary arranged with a 12-tooth sun gear and 72-tooth ring gear includes a gear ratio of 7:1 ([12 + 72]/12 = 7). Planetary gear models 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 reduction in a right-angle worm drive would depend on the number 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).
When a rotary machine such as an engine or electric motor cannot supply the desired output acceleration or torque, a gear reducer may provide a good solution. Parallel shaft, planetary, right-position worm drives are common gearbox types for achieving gear reduction. Contact Groschopp today with all your gear reduction questions.