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 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 split into four main constituents.
The housing with integrated internal teeth is actually a ring gear. In nearly all cases the housing is fixed. The driving sun pinion is usually in the center of the ring gear, and is coaxially arranged with regards to the output. The sun pinion is usually mounted on a clamping system to be able to offer the mechanical connection to the motor shaft. During operation, the planetary gears, which are mounted on a planetary carrier, roll between your sunlight pinion and the band equipment. The planetary carrier also represents the output shaft of the gearbox.
The sole purpose of the planetary gears is to transfer the mandatory torque. The number of teeth has no effect on the tranny ratio of the gearbox. The amount of planets can also vary. As the number of planetary gears increases, the distribution of the strain increases and therefore the torque which can be transmitted. Raising the number 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 advantage 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 concise style using planetary gears.
So long as the ring gear has a constant size, different ratios could be realized by different the amount of teeth of the sun gear and the number of the teeth 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, 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 band gear. In this case, we speak of multi-stage gearboxes.
With planetary gearboxes the speeds and torques can 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 repair the drive shaft to be able to grab the torque via the ring gear. Planetary gearboxes have grown to be extremely important in many regions of mechanical engineering.
They have grown to be particularly well established in areas where high output levels and fast speeds should be transmitted with favorable mass inertia ratio adaptation. High transmitting ratios may also easily be achieved with planetary gearboxes. Because of the 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 because of low rolling power
Almost unlimited transmission ratio options because of combination of several planet stages
Appropriate as planetary switching gear because of fixing this or that section 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 where parallel shafts and gears arrangement from manual equipment box are replaced with an increase of compact and more reliable sun and planetary kind of gears arrangement and also the manual clutch from manual power train can be replaced with hydro coupled clutch or torque convertor which produced the transmission automatic.
The idea of epicyclic gear box is extracted from the solar system which is considered to the perfect arrangement of objects.
The epicyclic gearbox usually comes with the P N R D S (Parking, Neutral, Invert, Drive, Sport) settings which is obtained by fixing of sun and planetary gears according to the need of the drive.
Ever-Power Planetary Gear Motors are an inline option providing high torque in low speeds. Our Planetary Gear Motors provide a high efficiency and offer excellent torque output in comparison with other types of gear motors. They can manage a various load with minimal backlash and are greatest for intermittent duty procedure. With endless decrease ratio choices, voltages, and sizes, Ever-Power Products includes a fully tailored equipment motor solution 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 contains an interior gear (sun equipment) that drives multiple outer gears (planet gears) producing torque. Multiple contact factors across the planetary gear train allows for higher torque generation compared to one of our spur equipment motors. In turn, an Ever-Power planetary equipment motor has the ability to handle different 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 Equipment Motors deliver exceptional torque output and efficiency in a compact, low noise design. These characteristics in addition to our value-added capabilities makes Ever-Power s equipment 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 exterior teeth on a concentric orbit. The circulation of the spur gear takes place in analogy to the orbiting of the planets in the solar system. This is how planetary gears obtained 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 casing is fixed. The driving sun pinion can be in the heart of the ring equipment, and is coaxially arranged with regards to the output. Sunlight pinion is usually mounted on a clamping system to be able to provide the mechanical link with the engine shaft. During procedure, the planetary gears, which are installed 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 amount of planets may also vary. As the number of planetary gears raises, the distribution of the strain increases and therefore 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 gear compared to an individual spur gear is based on this load distribution. Hence, it is feasible to transmit high torques wit
h high efficiency with a concise design using planetary gears.
So long as the ring gear includes a continuous size, different ratios could be realized by various the number of teeth of sunlight gear and the number of tooth of the planetary gears. Small 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 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 could be overlaid by having a ring gear that is not fixed but is driven in any direction of rotation. Additionally it is possible to repair the drive shaft to be able to grab the torque via the ring gear. Planetary gearboxes have grown to be extremely important in many 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 tranny ratios can also easily be performed with planetary gearboxes. Because of their positive properties and small design, the gearboxes possess many potential uses in industrial 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
Appropriate as planetary switching gear due to 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 for example an engine or electrical motor needs the result speed reduced and/or torque increased, gears are commonly utilized to accomplish the required result. Gear “reduction” particularly refers to the velocity of the rotary machine; the rotational velocity of the rotary machine can be “decreased” by dividing it by a gear ratio higher than 1:1. A gear ratio higher than 1:1 is achieved whenever a smaller gear (decreased size) with fewer quantity of tooth meshes and drives a more substantial gear with greater number of teeth.
Gear reduction has the opposite effect on torque. The rotary machine’s result torque is increased by multiplying the torque by the gear ratio, less some effectiveness losses.
While in lots of applications gear decrease reduces speed and boosts torque, in various other applications gear reduction is used to increase swiftness and reduce torque. Generators in wind turbines use gear decrease in this fashion to convert a relatively slow turbine blade acceleration to a higher speed capable of producing electricity. These applications use gearboxes that are assembled opposing of those in applications that reduce swiftness and increase torque.
How is gear decrease achieved? Many reducer types are capable of attaining gear decrease including, but not limited to, parallel shaft, planetary and right-position worm gearboxes. In parallel shaft gearboxes (or reducers), a pinion gear with a particular number of the teeth meshes and drives a larger gear with a lot more teeth. The “decrease” or equipment ratio is definitely calculated by dividing the number of the teeth on the large equipment by the number of teeth on the tiny gear. For example, if an electric motor drives a 13-tooth pinion equipment that meshes with a 65-tooth equipment, a reduced amount of 5:1 is achieved (65 / 13 = 5). If the electrical motor speed is definitely 3,450 rpm, the gearbox reduces this speed by five times to 690 rpm. If the electric motor torque is certainly 10 lb-in, the gearbox increases this torque by a factor of five to 50 lb-in (before subtracting out gearbox efficiency losses).
Parallel shaft gearboxes often contain multiple gear models thereby increasing the apparatus reduction. The full total gear decrease (ratio) is determined by multiplying each individual equipment ratio from each equipment set stage. If a gearbox consists of 3:1, 4:1 and 5:1 gear models, the full 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 acceleration 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 performance losses).
If a pinion equipment and its mating equipment have the same amount of teeth, no decrease occurs and the apparatus ratio is 1:1. The gear is named an idler and its own main function is to change the direction of rotation rather than decrease the speed or raise the torque.
Calculating the gear ratio in a planetary equipment reducer is less intuitive since it is dependent upon the amount of teeth of sunlight and band gears. The earth gears become idlers and do not affect the gear ratio. The planetary gear ratio equals the sum of the number of teeth on the sun and ring gear divided by the amount 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 models can achieve ratios from about 3:1 to about 11:1. If more gear reduction is needed, additional planetary stages can be used.
The gear decrease 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 has 50 the teeth, the resulting gear ratio is 25:1 (50 / 2 = 25).
Whenever a rotary machine such as for example an engine or electric electric motor cannot provide the desired output quickness or torque, a equipment reducer may provide a great choice. Parallel shaft, planetary, right-position worm drives are common gearbox types for attaining gear reduction. Contact Groschopp today with all of your gear reduction questions.