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 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 casing is fixed. The generating sun pinion is in the center of the ring equipment, and is coaxially arranged with regards to the output. Sunlight pinion is usually attached to a clamping system to be able to offer the mechanical connection to the electric motor shaft. During procedure, the planetary gears, which are mounted on a planetary carrier, roll between the sunlight pinion and the ring equipment. 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 amount of teeth has no effect on the tranny ratio of the gearbox. The number of planets may also vary. As the amount of planetary gears raises, the distribution of the strain increases and therefore the torque which can be transmitted. Increasing the number of tooth engagements also reduces the rolling power. Since only section of the total output has to be transmitted as rolling power, a planetary equipment is incredibly efficient. The advantage of a planetary gear compared to a single spur gear is based on this load distribution. It is therefore feasible 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 different the number of teeth of the sun gear and the number of teeth of the planetary gears. The smaller the sun equipment, 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 the sun gear are extremely little above and below these ratios. Higher ratios can be obtained by connecting several planetary stages in series in the same band 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 fixed but is driven in 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 grown to be extremely important in lots of areas of mechanical engineering.
They have grown to be particularly more developed in areas where high output levels and fast speeds must be transmitted with favorable mass inertia ratio adaptation. High transmitting ratios can also easily be performed 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 several planetary gears
High efficiency due to low rolling power
Nearly unlimited transmission ratio options due to mixture of several planet stages
Ideal as planetary switching gear because of fixing this or that portion 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 where parallel shafts and gears set up from manual gear box are replaced with an increase of compact and more dependable sun and planetary kind of gears arrangement and also the manual clutch from manual power teach is certainly replaced with hydro coupled clutch or torque convertor which in turn produced the transmission automatic.
The thought of epicyclic gear box is taken 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) modes 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 solution providing high torque at low speeds. Our Planetary Gear Motors offer a high efficiency and provide excellent torque output when compared to other types of equipment motors. They can manage a various load with reduced backlash and are greatest for intermittent duty operation. With endless decrease ratio choices, voltages, and sizes, Ever-Power Products has a fully tailored equipment motor alternative for you.
A Planetary Gear 
Engine from Ever-Power Products features one of our numerous kinds of DC motors in conjunction with among our uniquely designed epicyclic or planetary gearheads. A planetary gearhead consists of an internal gear (sun gear) that drives multiple outer gears (planet gears) generating torque. Multiple contact points over the planetary gear teach allows for higher torque generation compared to among our spur equipment motors. In turn, an Ever-Power planetary gear motor has the capacity to handle various load requirements; the more gear 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 output and effectiveness in a compact, low noise style. These characteristics in addition to our value-added features makes Ever-Power s equipment 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 how planetary gears obtained their name.
The components of a planetary gear train can be divided into four main constituents.
The housing with integrated internal teeth is actually a ring gear. In nearly all cases the casing is fixed. The traveling sun pinion is 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 your sun pinion and the band 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 has no effect on the tranny ratio of the gearbox. The number of planets may also vary. As the amount of planetary gears boosts, the distribution of the load increases and then the torque that can be transmitted. Raising the number of tooth engagements also reduces the rolling power. Since only section of the total result needs to be transmitted as rolling power, a planetary gear is extremely 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 has a continuous size, different ratios can be realized by varying the number of teeth of the sun gear and the amount of the teeth of the planetary gears. Small the sun gear, the higher the ratio. Technically, a meaningful ratio range for a planetary stage can be 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 a number of planetary levels 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’s not set but is driven in any direction of rotation. It is also possible to repair the drive shaft in order to grab the torque via the band 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 performed with planetary gearboxes. Because of their positive properties and small 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 several planetary gears
High efficiency due to low rolling power
Almost unlimited transmission ratio options due to 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
On the surface, it could seem 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 output speed reduced and/or torque improved, gears are commonly utilized to accomplish the required result. Gear “reduction” specifically refers to the speed of the rotary machine; the rotational speed of the rotary machine is “reduced” by dividing it by a equipment ratio greater than 1:1. A gear ratio greater than 1:1 is definitely achieved when a smaller equipment (reduced size) with fewer number of teeth meshes and drives a more substantial gear with greater quantity of teeth.
Gear reduction has the opposite influence on torque. The rotary machine’s result torque is increased by multiplying the torque by the gear ratio, less some effectiveness losses.
While in many applications gear reduction reduces speed and raises torque, in additional applications gear reduction is used to increase quickness and reduce torque. Generators in wind generators use gear reduction in this fashion to convert a comparatively slow turbine blade rate to a higher speed capable of generating electricity. These applications make use of gearboxes that are assembled opposite of those in applications that reduce speed and increase torque.
How is gear reduction achieved? Many reducer types are capable of attaining gear reduction including, but not limited by, parallel shaft, planetary and right-angle worm gearboxes. In parallel shaft gearboxes (or reducers), a pinion equipment with a specific number of the teeth meshes and drives a more substantial gear with a greater number of teeth. The “reduction” or equipment ratio can be calculated by dividing the amount of tooth on the large equipment by the amount of teeth on the tiny gear. For example, if a power motor drives a 13-tooth pinion equipment that meshes with a 65-tooth gear, a reduced amount of 5:1 is definitely achieved (65 / 13 = 5). If the electric motor speed is definitely 3,450 rpm, the gearbox reduces this rate by five instances to 690 rpm. If the motor torque is 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 many times contain multiple gear units thereby increasing the gear reduction. The total gear reduction (ratio) depends upon multiplying each individual gear ratio from each equipment arranged stage. If a gearbox consists of 3:1, 4:1 and 5:1 gear units, the full total ratio is 60:1 (3 x 4 x 5 = 60). Inside our example above, the 3,450 rpm electric engine would have its acceleration 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 equipment and its mating equipment have the same number of teeth, no reduction occurs and the gear ratio is 1:1. The gear is called an idler and its major function is to improve the direction of rotation rather than reduce the speed or boost the torque.
Calculating the gear ratio in a planetary gear reducer is much less intuitive as it is dependent on the number of teeth of the sun and band gears. The earth gears act as idlers and do not affect the gear ratio. The planetary gear ratio equals the sum of the amount of teeth on the sun and ring equipment divided by the amount 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 can be used.
The gear decrease in a right-angle worm drive is dependent 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 begins and the mating worm wheel provides 50 the teeth, 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 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.
