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 gear occurs in analogy to the orbiting of the planets in the solar program. This is one way planetary gears obtained their name.
The components 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 definitely in the heart of the ring gear, and is coaxially arranged with regards to the output. The sun pinion is usually mounted on a clamping system in order to provide the mechanical connection to the motor shaft. During operation, the planetary gears, which are mounted on a planetary carrier, roll between your sun pinion and the band 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 number of teeth has no effect on the transmitting 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 then the torque that can be transmitted. Increasing the amount of tooth engagements also decreases the rolling power. Since only section of the total output 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 lies in 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 sunlight gear and the amount 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, because the planetary gears and the sun gear are extremely small above and below these ratios. Higher ratios can be obtained by connecting many planetary stages in series in the same ring gear. In cases like this, 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. 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 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 achieved with planetary gearboxes. Because of the positive properties and small design, the gearboxes possess many potential uses in commercial 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
Almost 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
Suitability for a wide range 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 more compact and more dependable sun and planetary type of gears arrangement as well as the manual clutch from manual power teach is certainly replaced with hydro coupled clutch or torque convertor which made the transmission automatic.
The thought of epicyclic gear box is taken from the solar system which is considered 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 Gear Motors are an inline option 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 handle a different load with minimal backlash and are greatest for intermittent duty procedure. With endless decrease ratio choices, voltages, and sizes, Ever-Power Products has a fully tailored gear motor option for you.
A Planetary Gear Electric motor from Ever-Power Products features among our numerous kinds of DC motors in conjunction with among our uniquely designed epicyclic or planetary gearheads. A planetary gearhead consists of an interior gear (sun gear) that drives multiple external gears (planet gears) generating torque. Multiple contact points over the planetary gear teach allows for higher torque generation in comparison to among our spur gear motors. In turn, an Ever-Power planetary equipment motor has the ability to handle numerous load requirements; the more equipment stages (stacks), the higher the load distribution and torque tranny.
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 result and effectiveness in a concise, 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 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 external teeth on a concentric orbit. The circulation of the spur gear occurs in analogy to the orbiting of the planets in the solar program. This is how planetary gears acquired their name.
The components of a planetary gear train can be split into four main constituents.
The housing with integrated internal teeth is actually a ring gear. In the majority of cases the housing is fixed. The driving sun pinion is in the heart of the ring equipment, and is coaxially organized in relation to the output. The sun pinion is usually attached to a clamping system to be able to provide the mechanical link with the electric 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 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 number of planets may also vary. As the number of planetary gears increases, the distribution of the strain increases and therefore the torque that can be transmitted. Increasing the number of tooth engagements also decreases the rolling power. Since just section of the total result needs to be transmitted as rolling power, a planetary gear is incredibly efficient. The advantage 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 concise design using planetary gears.
Provided that the ring gear includes a constant size, different ratios could be realized by various the amount of teeth of sunlight gear and the number of teeth of the planetary gears. Small the sun equipment, the higher the ratio. Technically, a meaningful ratio range for a planetary stage is usually 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 a number of planetary levels in series in the same ring gear. In cases like this, we speak of 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 any direction of rotation. Additionally it is possible to fix 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 grown to be particularly well established 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 commercial 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 due to fixing this or that section of the gearbox
Possibility of 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. 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 quickness of the rotary machine; the rotational quickness of the rotary machine is certainly “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 (reduced size) with fewer amount of teeth meshes and drives a larger gear with greater amount 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 lots of applications gear decrease reduces speed and raises torque, in other applications gear reduction is used to increase velocity and reduce torque. Generators in wind turbines use gear decrease in this fashion to convert a comparatively slow turbine blade acceleration to a high speed capable of generating electricity. These applications use gearboxes that are assembled opposing of these in applications that decrease quickness and increase torque.
How is gear decrease achieved? Many reducer types can handle attaining gear decrease including, but not limited to, parallel shaft, planetary and right-angle worm gearboxes. In parallel shaft gearboxes (or reducers), a pinion equipment with a particular number of teeth meshes and drives a more substantial gear with a greater number of teeth. The “reduction” or equipment ratio is usually calculated by dividing the amount of tooth on the large gear by the amount of teeth on the small gear. For instance, if a power motor drives a 13-tooth pinion equipment that meshes with a 65-tooth equipment, a reduction of 5:1 can be achieved (65 / 13 = 5). If the electric motor speed is 3,450 rpm, the gearbox reduces this quickness by five times to 690 rpm. If the engine 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 often contain multiple gear models thereby increasing the gear reduction. The total gear decrease (ratio) is determined by multiplying each individual gear ratio from each gear set stage. If a gearbox includes 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 motor would have its rate decreased 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 effectiveness losses).
If a pinion equipment and its mating equipment have the same number of teeth, no decrease occurs and the gear ratio is 1:1. The apparatus is called an idler and its principal function is to improve the direction of rotation instead of reduce the speed or increase the torque.
Calculating the gear ratio in a planetary equipment reducer is less intuitive since it is dependent upon the number of teeth of the sun and ring gears. The earth gears act as idlers , nor affect the gear ratio. The planetary equipment 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 arranged with a 12-tooth sun gear and 72-tooth ring gear has a gear ratio of 7:1 ([12 + 72]/12 = 7). Planetary gear units can achieve ratios from about 3:1 to about 11:1. If more equipment reduction is necessary, additional planetary stages can be used.
The gear reduction in a right-angle worm drive is dependent 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 gear ratio is 25:1 (50 / 2 = 25).
When a rotary machine such as for example an engine or electric electric motor cannot supply the desired output speed or torque, a gear reducer may provide a good solution. Parallel shaft, planetary, right-position worm drives are common gearbox types for attaining gear reduction. Get in touch with Groschopp today with all your gear reduction questions.