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 system. This is how 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 actually a ring gear. In the majority of cases the housing is fixed. The driving sun pinion can be in the center of the ring equipment, and is coaxially organized with regards to the output. Sunlight pinion is usually mounted on a clamping system to be able to offer the mechanical connection to the engine 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 output shaft of the gearbox.
The sole reason for the planetary gears is to transfer the mandatory torque. The amount of teeth does not have any effect on the tranny ratio of the gearbox. The amount of planets may also vary. As the number of planetary gears improves, the distribution of the load increases and therefore the torque that can be transmitted. Increasing 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 incredibly efficient. The advantage of a planetary equipment compared to a single spur gear lies in this load distribution. Hence, it is possible to transmit high torques wit
h high efficiency with a concise style using planetary gears.
So long as the ring gear includes a continuous size, different ratios could be realized by different the amount of teeth of the sun gear and the amount of tooth of the planetary gears. Small the sun equipment, the higher the ratio. Technically, a meaningful ratio range for a planetary stage can be 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 several 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 ring gear that’s not set but is driven in virtually any direction of rotation. It is also possible to repair the drive shaft in order to grab the torque via the band equipment. Planetary gearboxes have grown to be extremely important in lots of regions of mechanical engineering.
They have become particularly more developed 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 achieved with planetary gearboxes. Because of the positive properties and small design, the gearboxes have many potential uses in commercial 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
Almost unlimited transmission ratio options due to combination of several planet stages
Appropriate as planetary switching gear because of fixing this or that area 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 set up from manual equipment box are replaced with more compact and more reliable sun and planetary type of gears arrangement and also the manual clutch from manual power train is usually replaced with hydro coupled clutch or torque convertor which produced the transmission automatic.
The thought 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, Reverse, Drive, Sport) modes 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 option 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 gear motors. They can handle a different load with reduced backlash and are best for intermittent duty operation. With endless reduction ratio choices, voltages, and sizes, Ever-Power Products has a fully tailored equipment motor option for you.
A Planetary Gear Motor from Ever-Power Items features one of our numerous kinds of DC motors coupled 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 factors across the planetary gear teach permits higher torque generation in comparison to among our spur gear motors. In turn, an Ever-Power planetary equipment motor has the capacity to handle different load requirements; the more gear stages (stacks), the higher the strain distribution and torque tranny.
Features and Benefits
High Torque Capabilities
Sleek Inline Design
High Efficiency
Ability to Handle Large Reduction Ratios
High Power Density
Applications
Our Planetary Equipment Motors deliver exceptional torque result and performance in a concise, low noise design. These characteristics furthermore to our value-added features 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 operate between a gear with internal teeth and a gear with external teeth on a concentric orbit. The circulation of the spur gear takes place in analogy to the orbiting of the planets in the solar program. This is one way planetary gears acquired their name.
The elements of a planetary gear train can be divided 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 generating sun pinion is usually in the center of the ring equipment, and is coaxially organized in relation to the output. Sunlight pinion is usually attached to a clamping system in order to offer the mechanical link with the motor shaft. During procedure, the planetary gears, which are installed on a planetary carrier, roll between your sunlight pinion and the ring 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 amount of teeth has no effect on the transmitting ratio of the gearbox. The amount of planets may also vary. As the amount of planetary gears improves, 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 section of the total result needs 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. Hence, it is feasible to transmit high torques wit
h high efficiency with a concise 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 sunlight gear and the amount of tooth 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 sunlight gear are extremely small above and below these ratios. Higher ratios can be acquired by connecting many 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 ring gear that is 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 ring equipment. Planetary gearboxes have grown to be extremely important in lots of regions of mechanical engineering.
They have become particularly more developed in areas where high output levels and fast speeds should 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 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 portion of the gearbox
Possibility of 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 for example an engine or electrical motor needs the result speed decreased and/or torque improved, gears are commonly utilized to accomplish the required result. Gear “reduction” particularly refers to the velocity of the rotary machine; the rotational swiftness of the rotary machine is definitely “decreased” by dividing it by a equipment ratio higher than 1:1. A gear ratio higher than 1:1 is usually achieved whenever a smaller gear (reduced size) with fewer number 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 output torque is improved by multiplying the torque by the apparatus ratio, less some performance losses.
While in many applications gear decrease reduces speed and raises torque, in additional applications gear decrease is used to improve quickness and reduce torque. Generators in wind generators use gear decrease in this manner to convert a comparatively slow turbine blade quickness to a higher speed capable of generating electricity. These applications use gearboxes that are assembled reverse of these in applications that reduce acceleration and increase torque.
How is gear reduction 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 gear with a particular number of the teeth meshes and drives a more substantial gear with a greater number of teeth. The “decrease” or equipment ratio is usually calculated by dividing the amount of tooth on the large gear by the number of teeth on the small gear. For example, if an electric motor drives a 13-tooth pinion gear that meshes with a 65-tooth equipment, a reduced amount of 5:1 is certainly achieved (65 / 13 = 5). If the electrical motor speed is certainly 3,450 rpm, the gearbox reduces this swiftness by five times to 690 rpm. If the motor torque is usually 10 lb-in, the gearbox increases this torque by one factor of five to 50 lb-in (before subtracting out gearbox performance losses).
Parallel shaft gearboxes often contain multiple gear units thereby increasing the gear reduction. The total gear reduction (ratio) is determined by multiplying each individual gear ratio from 
each gear arranged stage. If a gearbox contains 3:1, 4:1 and 5:1 gear units, the total ratio is 60:1 (3 x 4 x 5 = 60). Inside our example above, the 3,450 rpm electric motor would have its swiftness decreased to 57.5 rpm by using a 60:1 gearbox. The 10 lb-in electric electric motor torque would be increased to 600 lb-in (before performance losses).
If a pinion gear 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 own main function is to improve the path of rotation instead of reduce the speed or increase the torque.
Calculating the gear ratio in a planetary equipment reducer is much less intuitive since it is dependent on the number of teeth of sunlight and band gears. The planet gears become idlers , nor affect the apparatus ratio. The planetary equipment ratio equals the sum of the number of teeth on sunlight and ring equipment 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 equipment ratio of 7:1 ([12 + 72]/12 = 7). Planetary gear sets can achieve ratios from about 3:1 to about 11:1. If more gear reduction is necessary, additional planetary stages may 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 number 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 supply the desired output velocity 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. Contact Groschopp today with all of your gear reduction questions.
