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 occurs in analogy to the orbiting of the planets in the solar system. This is how planetary gears acquired their name.
The components 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 traveling sun pinion is in the center of the ring equipment, and is coaxially arranged in relation to the output. The sun pinion is usually mounted on a clamping system in order to offer the mechanical link with the electric motor shaft. During procedure, the planetary gears, which are installed on a planetary carrier, roll between the sun 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 number of teeth does not have any effect on the transmitting ratio of the gearbox. The amount of planets may also vary. As the number of planetary gears raises, the distribution of the load increases and then the torque which can be transmitted. Raising the amount of tooth engagements also decreases the rolling power. Since only part of the total output 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. Hence, it is feasible to transmit high torques wit
h high efficiency with a compact style using planetary gears.
So long as the ring gear has a continuous size, different ratios could be realized by different the amount of teeth of sunlight gear and the amount of tooth of the planetary gears. The smaller the sun gear, 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 sunlight gear are extremely small above and below these ratios. Higher ratios can be acquired by connecting several planetary phases in series in the same band gear. In cases like this, we talk about multi-stage gearboxes.
With planetary gearboxes the speeds and torques could be overlaid by having a band gear that’s not fixed but is driven in virtually any direction of rotation. It is also possible to fix the drive shaft in order to pick up the torque via the ring equipment. 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 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 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 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 area of the gearbox
Chance for use as overriding gearbox
Favorable volume output
Suitability for a wide selection 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 reliable 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 produced the transmission automatic.
The idea of epicyclic gear box is taken from the solar system which is known as to an ideal 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 need of the drive.
Ever-Power Planetary Equipment Motors are an inline remedy providing high torque in low speeds. Our Planetary Gear Motors provide a high efficiency and offer excellent torque output when compared to other types of equipment motors. They can deal with a various load with minimal backlash and are best for intermittent duty procedure. With endless decrease ratio options, voltages, and sizes, Ever-Power Products has a fully tailored gear motor remedy for you.
A Planetary Gear Electric motor from Ever-Power Products features one of our various types of DC motors coupled with among our uniquely designed epicyclic or planetary gearheads. A planetary gearhead contains an internal gear (sun gear) that drives multiple external gears (planet gears) generating torque. Multiple contact points over the planetary gear train allows for higher torque generation compared to one of our spur gear motors. In turn, an Ever-Power planetary equipment motor has the capacity to handle various load requirements; the more equipment stages (stacks), the bigger 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 output and effectiveness in a concise, low noise style. These characteristics in addition to our value-added capabilities makes Ever-Power s gear motors a fantastic 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 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 elements of a planetary gear train can 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 in the center of the ring gear, and is coaxially arranged in relation to the output. Sunlight pinion is usually attached to a clamping system in order to offer 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 band gear. The planetary carrier also represents the output shaft of the gearbox.
The sole reason for the planetary gears is to transfer the mandatory torque. The number of teeth has no effect on the transmitting ratio of the gearbox. The amount of planets may also vary. As the number of planetary gears raises, the distribution of the load increases and therefore the torque that can be transmitted. Increasing the number 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 extremely efficient. The advantage 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 style using planetary gears.
Provided that the ring gear has a constant 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. Small the sun gear, the higher 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 acquired by connecting a number of planetary stages 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’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 band 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 several planetary gears
High efficiency due to 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 area 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. Whenever a rotary machine such as an engine or electrical motor needs the result speed reduced and/or torque improved, gears are commonly utilized to accomplish the required result. Gear “reduction” particularly refers to the quickness of the rotary machine; the rotational acceleration of the rotary machine can be “reduced” by dividing it by a gear ratio higher than 1:1. A gear ratio greater than 1:1 is usually achieved whenever a smaller gear (decreased size) with fewer number of tooth meshes and drives a more substantial gear with greater amount of teeth.
Gear reduction gets the opposite influence on torque. The rotary machine’s result torque is improved by multiplying the torque by the gear ratio, less some effectiveness losses.
While in many applications gear reduction reduces speed and increases torque, in additional applications gear reduction is used to improve speed and reduce torque. Generators in wind turbines use gear reduction in this fashion to convert a relatively slow turbine blade speed to a high speed capable of producing electricity. These applications use gearboxes that are assembled reverse of those in applications that reduce swiftness 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 equipment with a specific number of teeth meshes and drives a more substantial gear with a lot more teeth. The “decrease” or equipment ratio is certainly calculated by dividing the amount of teeth on the large equipment by the number 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 reduced amount of 5:1 is achieved (65 / 13 = 5). If the electric motor speed can be 3,450 rpm, the gearbox reduces this quickness by five moments to 690 rpm. If the engine torque is certainly 10 lb-in, the gearbox raises this torque by a factor of five to 50 lb-in (before subtracting out gearbox performance losses).
Parallel shaft gearboxes often contain multiple gear pieces thereby increasing the apparatus reduction. The full total gear reduction (ratio) depends upon multiplying each individual equipment ratio from each equipment set stage. If a gearbox contains 3:1, 4:1 and 5:1 gear models, the full total ratio is 60:1 (3 x 4 x 5 = 60). In our example above, the 3,450 rpm electric motor would have its velocity reduced to 57.5 rpm by utilizing a 60:1 gearbox. The 10 lb-in electric motor torque would be increased to 600 lb-in (before efficiency losses).
If a pinion gear and its mating equipment have the same amount of teeth, no reduction occurs and the gear ratio is 1:1. The apparatus is called an idler and its major function is to change the direction of rotation rather than decrease the speed or increase the torque.
Calculating the gear ratio in a planetary equipment reducer is much less intuitive as it is dependent upon the amount of teeth of sunlight and ring gears. The planet gears act as idlers and do not affect the apparatus ratio. The planetary equipment ratio equals the sum of the amount of teeth on the sun and ring gear divided by the number of teeth on sunlight gear. For example, 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 sets 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 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 starts and the mating worm wheel provides 50 teeth, the resulting equipment ratio is 25:1 (50 / 2 = 25).
When a rotary machine such as an engine or electric motor cannot provide the desired output speed or torque, a equipment reducer may provide a good solution. 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.