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 program. This is one way 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 known as a ring gear. In nearly all cases the casing is fixed. The generating sun pinion is definitely in the center of the ring gear, and is coaxially organized in relation to the output. The sun pinion is usually mounted on a clamping system to be able to provide the mechanical connection to the motor shaft. During procedure, the planetary gears, which are mounted 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 purpose of the planetary gears is to transfer the required torque. The amount of teeth has no effect on the transmission ratio of the gearbox. The number of planets may also vary. As the amount of planetary gears improves, the distribution of the load increases and then the torque which can be transmitted. Raising the amount of tooth engagements also reduces the rolling power. Since only portion of the total result needs to be transmitted as rolling power, a planetary gear is extremely efficient. The benefit 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 concise design using planetary gears.
So long as the ring gear includes a continuous size, different ratios could be realized by varying the number of teeth of the sun gear and the amount of teeth of the planetary gears. The smaller 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 many planetary phases in series in the same band gear. In cases like this, we speak of 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 to be able to grab the torque via the ring equipment. Planetary gearboxes have become extremely important in lots of areas of mechanical engineering.
They have become particularly more developed 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 performed with planetary gearboxes. Because of the positive properties and small design, the gearboxes possess 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 due to low rolling power
Almost 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
Possibility of use as overriding gearbox
Favorable volume output
Suitability for a wide range of applications
Epicyclic gearbox is an automatic type gearbox where parallel shafts and gears set up from manual gear box are replaced with more compact and more reliable sun and planetary kind of gears arrangement as well as the manual clutch from manual power teach can be 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 includes the P N R D S (Parking, Neutral, Invert, Drive, Sport) settings which is obtained by fixing of sun and planetary gears based on the require of the drive.
Ever-Power Planetary Gear Motors are an inline remedy providing high torque at low speeds. Our Planetary Gear Motors offer a high efficiency and offer excellent torque output in comparison with other types of equipment motors. They can deal with a different load with reduced 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 solution for you.
A Planetary Gear Engine 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 contains an interior gear (sun equipment) that drives multiple external gears (planet gears) producing torque. Multiple contact factors across the planetary gear train allows for higher torque generation compared to one of our spur gear motors. Subsequently, an Ever-Power planetary equipment motor has the ability to handle various load requirements; the more gear 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 design. These characteristics in addition to our value-added features 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 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 external 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 one way 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 the majority of cases the housing is fixed. The generating sun pinion is usually in the center of the ring equipment, and is coaxially arranged in relation to the output. The sun pinion is usually attached to 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 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 required torque. The amount of teeth has no effect on the transmission ratio of the gearbox. The amount of planets can also vary. As the amount of planetary gears boosts, the distribution of the strain increases and then the torque which can be transmitted. Increasing the amount of tooth engagements also decreases the rolling power. Since just portion of the total result has to be transmitted as rolling power, a planetary equipment is extremely efficient. The advantage of a planetary equipment compared to an individual spur gear is based on this load distribution. It is therefore possible 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 various the amount of teeth of sunlight gear and the number of teeth of the planetary gears. The smaller 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 sunlight gear are extremely small above and below these ratios. Higher ratios can be obtained by connecting a number of planetary stages in series in the same ring gear. In this instance, we talk about multi-stage gearboxes.
With planetary gearboxes the speeds and torques can be overlaid by having a ring gear that is not set but is driven in any direction of rotation. Additionally it is possible to repair the drive shaft in order to grab the torque via the ring 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 tranny ratios may 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 advantages 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 because of combination of several planet stages
Suitable as planetary switching gear because of fixing this or that portion of the gearbox
Possibility of use as overriding gearbox
Favorable volume output
On the surface, it could 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 electric motor needs the result speed decreased and/or torque improved, gears are commonly utilized to accomplish the desired result. Gear “reduction” specifically refers to the rate of the rotary machine; the rotational quickness of the rotary machine is usually “reduced” by dividing it by a equipment ratio higher than 1:1. A gear ratio higher than 1:1 is definitely achieved whenever a smaller gear (reduced size) with fewer amount of tooth meshes and drives a more substantial gear with greater amount of teeth.
Gear reduction has the opposite influence on torque. The rotary machine’s result torque is improved by multiplying the torque by the gear ratio, less some performance losses.
While in many applications gear reduction reduces speed and boosts torque, in various other applications gear reduction is used to improve speed and reduce torque. Generators in wind generators use gear reduction in this manner to convert a comparatively slow turbine blade rate to a higher speed capable of producing electricity. These applications make use of gearboxes that are assembled reverse of these in applications that decrease quickness and increase torque.
How is gear reduction achieved? Many reducer types can handle attaining gear reduction including, but not limited to, 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 greater number of teeth. The “reduction” or gear ratio can be calculated by dividing the amount of teeth on the large gear by the number of teeth on the tiny gear. For instance, if a power motor drives a 13-tooth pinion equipment that meshes with a 65-tooth equipment, a reduction of 5:1 is definitely achieved (65 / 13 = 5). If the electrical motor speed is 3,450 rpm, the gearbox reduces this acceleration by five instances to 690 rpm. If the electric motor torque can be 10 lb-in, the gearbox boosts this torque by one factor of five to 50 lb-in (before subtracting out gearbox efficiency losses).
Parallel shaft gearboxes often contain multiple gear sets thereby increasing the gear reduction. The full total gear decrease (ratio) depends upon multiplying each individual equipment ratio from each equipment established 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 engine would have its speed reduced 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 amount of teeth, no decrease occurs and the apparatus ratio is 1:1. The apparatus is named an idler and its own main function is to change the direction of rotation rather than decrease the speed or boost the torque.
Calculating the apparatus ratio in a planetary equipment reducer is less intuitive as it is dependent on 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 number of teeth on the sun and ring equipment divided by the amount of teeth on sunlight 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 units can perform ratios from about 3:1 to about 11:1. If more equipment 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 amount of teeth on the mating worm wheel. If the worm has two starts and the mating worm wheel has 50 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 gear reducer may provide a good solution. Parallel shaft, planetary, right-position worm drives are normal gearbox types for achieving gear reduction. Contact Groschopp today with all of your gear reduction questions.