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 how planetary gears obtained their name.
The elements of a planetary gear train can be split into four main constituents.
The housing with integrated internal teeth is actually a ring gear. In nearly all cases the housing is fixed. The driving sun pinion is usually in the center of the ring equipment, and is coaxially organized with regards 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 the sun pinion and the band equipment. 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 number of teeth does not have any effect on the transmission ratio of the gearbox. The amount of planets can also vary. As the amount of planetary gears increases, the distribution of the load increases and therefore the torque that can be transmitted. Increasing the amount of tooth engagements also reduces the rolling power. Since just area of the total result needs to be transmitted as rolling power, a planetary gear is extremely efficient. The benefit 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 concise design using planetary gears.
Provided that the ring gear includes a continuous size, different ratios could be realized by different the number of teeth of the sun gear and the number of tooth of the planetary gears. The smaller 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 the sun gear are extremely small above and below these ratios. Higher ratios can be obtained by connecting several planetary stages in series in the same band gear. In this case, we talk about multi-stage gearboxes.
With planetary gearboxes the speeds and torques could be overlaid by having a ring gear that is not set but is driven in any direction of rotation. It is also possible to fix the drive shaft to be able to pick up the torque via the ring gear. Planetary gearboxes have become extremely important in lots of regions 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 achieved with planetary gearboxes. Because of the positive properties and compact 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 several planetary gears
High efficiency because of 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 section 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 set up from manual gear box are replaced with an increase of compact and more reliable sun and planetary kind 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 thought of epicyclic gear box is extracted 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, Reverse, 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 provide a high efficiency and provide excellent torque output in comparison with other types of equipment motors. They can handle a various load with reduced backlash and are best for intermittent duty procedure. With endless decrease ratio choices, voltages, and sizes, Ever-Power Products includes a fully tailored equipment motor option for you.
A Planetary Gear Engine from Ever-Power Products features one of our numerous kinds of DC motors coupled with one of 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 factors over the planetary gear teach permits higher torque generation in comparison to among our spur gear motors. Subsequently, an Ever-Power planetary gear motor has the ability to handle various load requirements; the more gear stages (stacks), the higher the strain 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 effectiveness in a compact, low noise design. These characteristics furthermore to our value-added capabilities makes Ever-Power s gear 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 Automobiles (AGV)
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 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 parts of a planetary gear train could be split into four main constituents.
The housing with integrated internal teeth is actually a ring gear. In nearly all cases the casing is fixed. The driving sun pinion is definitely in the center of the ring gear, and is coaxially organized 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 the sunlight 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 amount of teeth does not have any 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 load increases and then the torque which can be transmitted. Increasing the number of tooth engagements also reduces the rolling power. Since only portion of the total output has to be transmitted as rolling power, a planetary gear is extremely efficient. The benefit of a planetary equipment compared to a single spur gear lies in this load distribution. It is therefore possible to transmit high torques wit
h high efficiency with a compact style using planetary gears.
Provided that the ring gear has a constant size, different ratios can be realized by varying the number of teeth of sunlight 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, since the planetary gears and the sun gear are extremely small above and below these ratios. Higher ratios can be acquired by connecting many planetary levels 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. It is also possible to fix the drive shaft to be able to grab the torque via the ring gear. Planetary gearboxes have grown to be extremely important in many regions of mechanical engineering.
They have become particularly more developed in areas where high output levels and fast speeds must 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 because of low rolling power
Nearly unlimited transmission ratio options because of combination of several planet stages
Appropriate 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 may seem that gears are being “reduced” in quantity or size, which is partially true. Whenever a rotary machine such as for example an engine or electric motor needs the output speed decreased and/or torque improved, gears are commonly utilized to accomplish the desired result. Gear “reduction” specifically refers to the velocity of the rotary machine; the rotational velocity 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 achieved when a smaller gear (reduced size) with fewer number of teeth meshes and drives a more substantial gear with greater number of teeth.
Gear reduction gets the opposite influence 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 boosts torque, in additional applications gear reduction is used to increase speed and reduce torque. Generators in wind generators use gear decrease in this manner to convert a comparatively slow turbine blade quickness to a higher speed capable of generating electricity. These applications use gearboxes that are assembled reverse of those in applications that reduce velocity and increase torque.
How is gear decrease achieved? Many reducer types are capable of attaining gear decrease 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 larger gear with a greater number of teeth. The “decrease” or equipment ratio is calculated by dividing the amount of teeth on the large equipment by the number of teeth on the tiny 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 definitely achieved (65 / 13 = 5). If the electrical motor speed is definitely 3,450 rpm, the gearbox reduces this swiftness by five occasions to 690 rpm. If the motor torque is usually 10 lb-in, the gearbox improves this torque by a factor of five to 50 lb-in (before subtracting out gearbox efficiency losses).
Parallel shaft gearboxes often contain multiple gear models thereby increasing the apparatus reduction. The total gear decrease (ratio) depends upon multiplying each individual gear ratio from each equipment established 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). Inside our example above, the 3,450 rpm electric electric motor would have its quickness decreased to 57.5 rpm by utilizing a 60:1 gearbox. The 10 lb-in electric engine torque would be increased to 600 lb-in (before performance losses).
If a pinion gear and its mating gear have the same quantity of teeth, no reduction occurs and the apparatus ratio is 1:1. The gear is called an idler and its own major function is to improve the path of rotation instead of reduce the speed or increase the torque.
Calculating the apparatus ratio in a planetary gear reducer is less intuitive as it is dependent on the number of teeth of sunlight 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 number of teeth on sunlight and ring gear divided by the number of teeth on the sun gear. For example, a planetary established with a 12-tooth sun gear and 72-tooth ring gear includes a equipment ratio of 7:1 ([12 + 72]/12 = 7). Planetary gear pieces 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 amount of threads or “starts” on the worm and the amount of teeth on the mating worm wheel. If the worm has two begins 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 motor cannot supply the desired output swiftness or torque, a gear reducer may provide a great choice. Parallel shaft, planetary, right-position worm drives are common gearbox types for achieving gear reduction. Get in touch with Groschopp today with all of your gear reduction questions.