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 equipment occurs in analogy to the orbiting of the planets in the solar program. This is how 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 known as a ring gear. In nearly all cases the housing is fixed. The traveling 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 provide the mechanical connection to the motor shaft. During procedure, 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 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 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 therefore the torque that can be transmitted. Raising the number of tooth engagements also reduces the rolling power. Since only portion of the total output needs to be transmitted as rolling power, a planetary gear is extremely efficient. The benefit of a planetary gear compared to an individual spur gear lies in 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 can be realized by various the amount of teeth of sunlight 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 approx. 3:1 to 10:1, since the planetary gears and the sun gear are extremely little above and below these ratios. Higher ratios can be acquired by connecting a number of planetary levels in series in the same ring gear. In cases like this, we talk about multi-stage gearboxes.
With planetary gearboxes the speeds and torques can be overlaid by having a band gear that’s not set but is driven in virtually any direction of rotation. It is also possible to fix the drive shaft in order to grab 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 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 small 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 many planetary gears
High efficiency due to low 
rolling power
Nearly unlimited transmission ratio options due to combination of several planet stages
Appropriate as planetary switching gear due to fixing this or that part of the gearbox
Chance for 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 equipment 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 usually replaced with hydro coupled clutch or torque convertor which made the transmission automatic.
The thought of epicyclic gear box is extracted from the solar system which is considered to the perfect arrangement of objects.
The epicyclic gearbox usually includes the P N R D S (Parking, Neutral, Reverse, 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 alternative providing high torque at low speeds. Our Planetary Gear Motors provide a high efficiency and provide excellent torque output when compared to other types of gear motors. They can handle a various load with reduced backlash and are greatest for intermittent duty procedure. With endless decrease ratio options, voltages, and sizes, Ever-Power Products includes a fully tailored equipment motor answer for you.
A Planetary Gear Engine 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 outer gears (planet gears) producing torque. Multiple contact factors across the planetary gear teach permits higher torque generation compared to one of our spur equipment motors. Subsequently, an Ever-Power planetary gear motor has the ability to handle different 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
Capability to Handle Large Reduction Ratios
High Power Density
Applications
Our Planetary Gear Motors deliver exceptional torque result and efficiency in a concise, low noise style. 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 equipment takes place in analogy to the orbiting of the planets in the solar system. This is how planetary gears acquired their name.
The elements 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 nearly all cases the housing is fixed. The traveling sun pinion can be in the center of the ring gear, and is coaxially organized with regards to the output. Sunlight pinion is usually attached to a clamping system to be able to offer the mechanical link with the motor shaft. During procedure, the planetary gears, which are installed 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 number of teeth has no effect on the transmitting ratio of the gearbox. The number of planets can also vary. As the amount of planetary gears increases, the distribution of the load increases and therefore the torque which can be transmitted. Raising the amount of tooth engagements also reduces the rolling power. Since only area 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 is based on this load distribution. Hence, it is possible to transmit high torques wit
h high efficiency with a compact style using planetary gears.
Provided that the ring gear has a continuous size, different ratios could be realized by various the number of teeth of the sun gear and the number of tooth of the planetary gears. Small the sun gear, 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 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 can be overlaid by having a ring gear that is not set 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 ring gear. Planetary gearboxes have become extremely important in lots of areas 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 transmission ratios may also easily be achieved with planetary gearboxes. Because of their 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 because of low rolling power
Almost unlimited transmission ratio options because of combination of several planet stages
Suitable as planetary switching gear because of fixing this or that section of the gearbox
Chance for 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 an engine or electric motor needs the result speed reduced and/or torque improved, gears are commonly used to accomplish the required result. Gear “reduction” particularly refers to the swiftness of the rotary machine; the rotational speed of the rotary machine is “reduced” by dividing it by a equipment ratio higher than 1:1. A gear ratio greater than 1:1 is usually achieved when a smaller equipment (decreased size) with fewer quantity of the teeth meshes and drives a larger gear with greater amount of teeth.
Gear reduction gets the opposite effect on torque. The rotary machine’s result torque is improved by multiplying the torque by the apparatus ratio, less some effectiveness losses.
While in many applications gear reduction reduces speed and raises torque, in various other applications gear reduction is used to increase rate and reduce torque. Generators in wind generators use gear decrease in this manner to convert a comparatively slow turbine blade velocity to a high speed capable of producing electricity. These applications use gearboxes that are assembled reverse of these in applications that reduce acceleration and increase torque.
How is gear decrease achieved? Many reducer types can handle attaining gear reduction including, but not limited by, parallel shaft, planetary and right-angle worm gearboxes. In parallel shaft gearboxes (or reducers), a pinion gear with a particular number of teeth meshes and drives a larger gear with a lot more teeth. The “reduction” or equipment ratio is usually calculated by dividing the number of the teeth on the large gear by the amount of teeth on the small gear. For instance, if a power motor drives a 13-tooth pinion gear that meshes with a 65-tooth equipment, a reduction of 5:1 is certainly achieved (65 / 13 = 5). If the electrical motor speed is 3,450 rpm, the gearbox reduces this rate by five moments to 690 rpm. If the motor torque is certainly 10 lb-in, the gearbox increases this torque by one factor of five to 50 lb-in (before subtracting out gearbox effectiveness losses).
Parallel shaft gearboxes often contain multiple gear sets thereby increasing the apparatus reduction. The total gear reduction (ratio) is determined by multiplying each individual gear ratio from each equipment established 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). In our example above, the 3,450 rpm electric engine would have its swiftness 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 number of teeth, no decrease occurs and the gear ratio is 1:1. The gear is named an idler and its own primary function is to improve the path of rotation rather than decrease the speed or raise the torque.
Calculating the apparatus ratio in a planetary gear reducer is less intuitive since it is dependent on the number of teeth of sunlight and ring gears. The earth gears act as idlers , nor affect the gear ratio. The planetary equipment ratio equals the sum of the amount of teeth on sunlight and ring gear divided by the amount of teeth on the sun 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 units can perform ratios from about 3:1 to about 11:1. If more gear reduction is needed, additional planetary stages can 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 number of teeth on the mating worm wheel. If the worm has two starts and the mating worm wheel provides 50 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 quickness or torque, a equipment reducer may provide a good solution. Parallel shaft, planetary, right-position worm drives are normal gearbox types for attaining gear reduction. Contact Groschopp today with all of your gear reduction questions.
