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 system. This is one way planetary gears obtained their name.
The parts 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 driving sun pinion can be in the heart of the ring gear, and is coaxially arranged with regards to the output. The sun pinion is usually attached to a clamping system in order to offer the mechanical link with the engine shaft. During procedure, the planetary gears, which are mounted on a planetary carrier, roll between the sun 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 number of teeth does not have any effect on the transmitting ratio of the gearbox. The number of planets can also vary. As the number of planetary gears boosts, the distribution of the load increases and then the torque which can be transmitted. Raising the number of tooth engagements also reduces the rolling power. Since just portion 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 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 has a constant size, different ratios can be realized by different the number 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 approx. 3:1 to 10:1, since the planetary gears and sunlight gear are extremely small above and below these ratios. Higher ratios can be obtained by connecting many planetary levels in series in the same ring gear. In this instance, we talk about 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 any direction of rotation. It is also possible to fix the drive shaft in order to pick up the torque via the ring gear. Planetary gearboxes have grown to be extremely important in many regions 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 transmission ratios can also easily be performed with planetary gearboxes. Because of the 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 because of low rolling power
Nearly unlimited transmission ratio options because of combination of several planet stages
Ideal as planetary switching gear because of 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 arrangement from manual gear box are replaced with an increase of compact and more reliable sun and planetary type of gears arrangement and also the manual clutch from manual power train is definitely 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 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) settings which is obtained by fixing of sun and planetary gears according to the require of the drive.
Ever-Power Planetary Equipment 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 equipment motors. They can handle a different load with minimal 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 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 consists of an internal gear (sun gear) that drives multiple external 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 gear motor has the ability to handle different load requirements; the more equipment stages (stacks), the bigger 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 effectiveness in a compact, low noise design. These characteristics in addition to our value-added features makes Ever-Power s equipment motors a fantastic 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)
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 occurs in analogy to the orbiting of the planets in the solar system. This is one way 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 generating sun pinion is usually in the center of the ring equipment, and is coaxially arranged with regards to the output. Sunlight pinion is usually mounted on a clamping system in order to offer the mechanical link with the electric motor 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 has no effect on the transmission ratio of the gearbox. The number of planets may also vary. As the amount of planetary gears increases, the distribution of the load increases and then the torque that can be transmitted. Increasing the amount of tooth engagements also reduces the rolling power. Since just part of the total output has to be transmitted as rolling power, a planetary gear is incredibly efficient. The benefit of a planetary equipment compared to a single spur gear is based on this load distribution. Hence, it is possible to transmit high torques wit
h high efficiency with a compact design using planetary gears.
So long as the ring gear has a continuous size, different ratios could be realized by varying the amount 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 certainly 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 a number of planetary phases in series in the same ring gear. In this instance, we speak of multi-stage gearboxes.
With planetary gearboxes the speeds and torques could be overlaid by having a band gear that is not set but is driven in any direction of rotation. It is also possible to fix the drive shaft in order to pick up the torque via the ring gear. Planetary gearboxes have become extremely important in many regions of mechanical engineering.
They have grown to be particularly well established in areas where high output levels and fast speeds must be transmitted with favorable mass inertia ratio adaptation. High tranny ratios may also easily be achieved with planetary gearboxes. Because of the positive properties and small 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 many planetary gears
High efficiency because of 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 part 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 an engine or electric motor needs the output speed reduced and/or torque increased, gears are commonly used to accomplish the required result. Gear “reduction” specifically refers to the acceleration of the rotary machine; the rotational acceleration of the rotary machine is usually “reduced” by dividing it by a gear ratio greater than 1:1. A gear ratio greater than 1:1 is usually achieved whenever a smaller gear (reduced size) with fewer amount of the teeth meshes and drives a larger gear with greater quantity of teeth.
Gear reduction gets the opposite effect on torque. The rotary machine’s result torque is increased by multiplying the torque by the apparatus ratio, less some efficiency losses.
While in many applications gear reduction reduces speed and increases torque, in other applications gear reduction is used to increase swiftness and reduce torque. Generators in wind turbines use gear decrease in this fashion to convert a comparatively slow turbine blade quickness to a high speed capable of generating electricity. These applications make use of gearboxes that are assembled opposing of these in applications that reduce speed and increase torque.
How is gear decrease achieved? Many reducer types can handle attaining gear decrease including, but not limited by, 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 larger gear with a greater number of teeth. The “reduction” or equipment ratio is usually calculated by dividing the number of teeth on the large equipment by the number of teeth on the small gear. For example, if an electric motor drives a 13-tooth pinion equipment that meshes with a 65-tooth gear, a reduced amount of 5:1 is usually achieved (65 / 13 = 5). If the electrical motor speed can be 3,450 rpm, the gearbox reduces this acceleration by five occasions to 690 rpm. If the electric motor torque is definitely 10 lb-in, the gearbox raises this torque by one factor of five to 50 lb-in (before subtracting out gearbox performance losses).
Parallel shaft gearboxes often contain multiple gear models thereby increasing the gear reduction. The total gear decrease (ratio) depends upon multiplying each individual gear ratio from each gear set stage. If a gearbox consists of 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 engine would have its rate reduced 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 effectiveness losses).
If a pinion gear and its mating gear have the same number of teeth, no reduction occurs and the gear ratio is 1:1. The apparatus is called an idler and its primary function is to change the direction of rotation instead of decrease the speed or boost the torque.
Calculating the apparatus ratio in a planetary gear reducer is less intuitive since it is dependent upon the amount of teeth of sunlight and band gears. The earth gears become idlers and don’t affect the apparatus ratio. The planetary gear ratio equals the sum of the number of teeth on the sun and ring equipment divided by the amount of teeth on sunlight gear. For instance, a planetary set with a 12-tooth sun gear and 72-tooth ring gear has 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 equipment reduction is needed, 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 begins and the mating worm wheel offers 50 tooth, the resulting equipment ratio is 25:1 (50 / 2 = 25).
When a rotary machine such as an engine or electric electric motor cannot provide the desired output swiftness or torque, a equipment reducer may provide a great choice. 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.