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 takes place 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 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 traveling sun pinion can be 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 to be able to offer the mechanical link with the motor shaft. During operation, the planetary gears, which are mounted on a planetary carrier, roll between the 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 number of teeth has no effect on the transmission ratio of the gearbox. The number of planets can also vary. As the amount of planetary gears increases, the distribution of the strain increases and then the torque that can be transmitted. Increasing the number of tooth engagements also reduces the rolling power. Since only section of the total result has to be transmitted as rolling power, a planetary gear is incredibly efficient. The benefit of a planetary equipment compared to an individual 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 constant size, different ratios can be realized by varying the number 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 is certainly 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 many planetary phases in series in the same ring gear. In this instance, we talk about 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 virtually any direction of rotation. Additionally it is possible to fix the drive shaft in order to pick up the torque via the band gear. Planetary gearboxes have become extremely important in many regions of mechanical engineering.
They have become particularly well established in areas where high output levels and fast speeds must be transmitted with favorable mass inertia ratio adaptation. High tranny ratios may also easily be achieved with planetary gearboxes. Because of the positive properties and compact 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 because of 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 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 where parallel shafts and gears arrangement 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 teach is definitely 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 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 need of the drive.
Ever-Power Planetary Equipment 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 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 includes a fully tailored equipment motor option for you.
A Planetary Gear Electric motor from Ever-Power Items features one of our numerous kinds of DC motors coupled with one of our uniquely designed epicyclic or planetary gearheads. A planetary gearhead includes an interior gear (sun equipment) that drives multiple external gears (planet gears) producing torque. Multiple contact points across the planetary gear train allows for higher torque generation in comparison to among our spur gear motors. Subsequently, an Ever-Power planetary equipment motor has the ability to handle various load requirements; the more equipment stages (stacks), the bigger the strain 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 performance in a compact, low noise style. These characteristics furthermore to our value-added features makes Ever-Power s gear motors a fantastic 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 Automobiles (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 the majority of cases the casing is fixed. The traveling sun pinion is usually in the center of the ring equipment, and is coaxially arranged in relation to the output. Sunlight pinion is usually attached to a clamping system to be able to provide the mechanical connection to the motor shaft. During operation, 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 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 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 which can be transmitted. Increasing the number of tooth engagements also reduces the rolling power. Since just part of the total result 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 feasible 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 can be realized by different the number of teeth of the sun gear and the amount of tooth of the planetary gears. Small the sun equipment, the greater the ratio. Technically, a meaningful ratio range for a planetary stage is definitely 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 a number of planetary phases in series in the same ring gear. In this case, we talk about 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 to be able to pick up the torque via the ring equipment. Planetary gearboxes have become extremely important in many areas of mechanical engineering.
They have become particularly well established in areas where high output levels and fast speeds must be transmitted with favorable mass inertia ratio adaptation. High tranny ratios can also easily be performed with planetary gearboxes. Because of the 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 combination of several planet stages
Ideal 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 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 increased, gears are commonly used to accomplish the desired result. Gear “reduction” specifically refers to the rate 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 when a smaller equipment (decreased size) with fewer amount of tooth meshes and drives a larger gear with greater quantity of teeth.
Gear reduction gets the opposite influence on torque. The rotary machine’s result torque is increased by multiplying the torque by the gear ratio, less some performance losses.
While in lots of applications gear reduction reduces speed and raises torque, in additional applications gear decrease is used to increase speed and reduce torque. Generators in wind turbines use gear decrease in this manner to convert a relatively slow turbine blade rate to a high speed capable of producing electricity. These applications use gearboxes that are assembled opposing of those in applications that decrease swiftness and increase torque.
How is gear decrease achieved? Many reducer types are capable of attaining gear decrease 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 tooth meshes and drives a more substantial gear with a greater number of teeth. The “reduction” or equipment ratio is certainly calculated by dividing the number of tooth on the large gear by the number of teeth on the small gear. For example, 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 electrical motor speed is 3,450 rpm, the gearbox reduces this acceleration by five times to 690 rpm. If the motor torque is 10 lb-in, the gearbox raises this torque by a factor of five to 50 lb-in (before subtracting out gearbox effectiveness losses).
Parallel shaft gearboxes many times contain multiple gear sets thereby increasing the gear reduction. The total gear reduction (ratio) depends upon multiplying each individual gear ratio from each equipment established stage. If a gearbox contains 3:1, 4:1 and 5:1 gear sets, the total ratio is 60:1 (3 x 4 x 5 = 60). Inside our example above, the 3,450 rpm electric electric motor would have its swiftness 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 effectiveness losses).
If a pinion gear and its mating gear have the same quantity of teeth, no decrease occurs and the apparatus ratio is 1:1. The apparatus is named an idler and its main function is to change the direction of rotation instead of reduce the speed or increase the torque.
Calculating the apparatus ratio in a planetary equipment reducer is less intuitive as it is dependent upon the amount of teeth of sunlight and ring gears. The earth gears act as idlers and do not affect the apparatus ratio. The planetary gear ratio equals the sum of the amount of teeth on sunlight and ring equipment divided by the number of teeth on sunlight gear. For instance, a planetary established 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 has 50 the teeth, the resulting equipment ratio is 25:1 (50 / 2 = 25).
When a rotary machine such as an engine or electric electric motor cannot provide the desired output rate or torque, a equipment reducer may provide a good solution. Parallel shaft, planetary, right-position worm drives are common gearbox types for achieving gear reduction. Contact Groschopp today with all your gear reduction questions.