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 takes place 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 divided 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 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 gear. 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 tranny ratio of the gearbox. The number of planets may also vary. As the amount of planetary gears increases, 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 just 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 style 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 number 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, because the planetary gears and the sun 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 talk about 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 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 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 performed with planetary gearboxes. Because of the positive properties and compact 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 due to low rolling power
Nearly unlimited transmission ratio options because of mixture of several planet stages
Suitable 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 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 produced 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 option 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 gear motors. They can deal with a various load with reduced backlash and are best for intermittent duty procedure. With endless decrease ratio choices, voltages, and sizes, Ever-Power Products includes a fully tailored gear motor answer for you.
A Planetary Gear Engine 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 consists of an interior gear (sun equipment) that drives multiple external gears (planet gears) generating torque. Multiple contact factors across the planetary gear train allows for higher torque generation compared to one of our spur equipment motors. Subsequently, an Ever-Power planetary equipment motor has the ability to handle numerous 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 great 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 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 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 gear, 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 sun 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 part of the total result has to be transmitted as rolling power, a planetary equipment is extremely efficient. The benefit 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 constant size, different ratios can be realized by various the number of teeth of sunlight gear and the number 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, because the planetary gears and sunlight gear are extremely small above and below these ratios. Higher ratios can be obtained by connecting many 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 pick up 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 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 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
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 electrical 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 speed 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 when a smaller gear (reduced size) with fewer amount 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 apparatus ratio, less some performance losses.
While in many applications gear reduction reduces speed and improves torque, in various other applications gear reduction is used to improve speed and reduce torque. Generators in wind generators use gear reduction in this fashion to convert a relatively slow turbine blade acceleration to a higher speed capable of producing electricity. These applications make use of gearboxes that are assembled reverse of those in applications that decrease quickness and increase torque.
How is gear reduction achieved? Many reducer types are capable of attaining gear reduction including, but not limited by, parallel shaft, planetary and right-position worm gearboxes. In parallel shaft gearboxes (or reducers), a pinion equipment with a certain number of teeth meshes and drives a more substantial gear with a lot more 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 reduced amount 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 moments to 690 rpm. If the electric motor torque can be 10 lb-in, the gearbox improves this torque by one factor of five to 50 lb-in (before subtracting out gearbox efficiency losses).
Parallel shaft gearboxes often contain multiple gear units thereby increasing the gear reduction. The full total gear decrease (ratio) is determined by multiplying each individual equipment ratio from each equipment established stage. If a gearbox contains 3:1, 4:1 and 5:1 gear pieces, the full total ratio is 60:1 (3 x 4 x 5 = 60). Inside our example above, the 3,450 rpm electric engine would have its speed 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 number of teeth, no decrease occurs and the apparatus ratio is 1:1. The apparatus is called 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 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 the sun 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 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 begins 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 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. Get in touch with Groschopp today with all of your gear reduction questions.