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 exterior teeth on a concentric orbit. The circulation of the spur gear occurs in analogy to the orbiting of the planets in the solar system. This is one way planetary gears obtained their name.
The parts of a planetary gear train could 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 traveling sun pinion is usually in the heart of the ring equipment, and is coaxially organized 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 operation, the planetary gears, which are mounted on a planetary carrier, roll between your sunlight pinion and the band 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 number of teeth does not have any effect on the transmitting 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 therefore the torque that can be transmitted. Raising the number of tooth engagements also decreases the rolling power. Since just 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 a single spur gear lies in this load distribution. It is therefore feasible to transmit high torques wit
h high efficiency with a concise design using planetary gears.
So long as the ring gear includes a constant size, different ratios could be realized by varying the amount of teeth of sunlight gear and the number of teeth of the planetary gears. The smaller the sun equipment, the greater the ratio. Technically, a meaningful ratio range for a planetary stage is usually approx. 3:1 to 10:1, because the planetary gears and the sun gear are extremely little above and below these ratios. Higher ratios can be acquired by connecting a number of planetary levels in series in the same band 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 set but is driven in any direction of rotation. Additionally it is possible to fix the drive shaft to be able to grab the torque via the band 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 transmission ratios can also easily be performed with planetary gearboxes. Because of the positive properties and small 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 because of low rolling power
Almost 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
Possibility of use as overriding gearbox
Favorable volume output
Suitability for a wide range of applications
Epicyclic gearbox can be an automatic type gearbox where parallel shafts and gears arrangement from manual gear box are replaced with more compact and more dependable sun and planetary type of gears arrangement as well as the manual clutch from manual power teach is usually replaced with hydro coupled clutch or torque convertor which in turn made the transmission automatic.
The idea of epicyclic gear box is taken from the solar system which is known as to the perfect arrangement of objects.
The epicyclic gearbox usually comes with the P N R D S (Parking, Neutral, Reverse, Drive, Sport) settings which is obtained by fixing of sun and planetary gears based on the need of the drive.
Ever-Power Planetary Gear Motors are an inline alternative providing high torque in low speeds. Our Planetary Gear Motors provide a high efficiency and offer excellent torque output when compared to other types of equipment motors. They can deal with a various load with reduced backlash and are best for intermittent duty operation. With endless decrease ratio choices, voltages, and sizes, Ever-Power Products has a fully tailored equipment motor alternative for you.
A Planetary Gear Motor from Ever-Power Items features among our numerous kinds of DC motors in conjunction with among our uniquely designed epicyclic or planetary gearheads. A planetary gearhead contains an internal gear (sun gear) that drives multiple outer gears (planet gears) generating torque. Multiple contact points across the planetary gear teach permits higher torque generation in comparison to among our spur gear motors. In turn, an Ever-Power planetary gear motor has the capacity to handle numerous 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 performance in a compact, 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 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 exterior teeth on a concentric orbit. The circulation of the spur gear occurs 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 could be split 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 traveling sun pinion is certainly in the heart of the ring equipment, and is coaxially arranged with regards to the output. Sunlight pinion is usually attached to a clamping system in order to offer the mechanical link with 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 result shaft of the gearbox.
The sole reason for the planetary gears is to transfer the mandatory torque. The amount of teeth has no effect on the tranny ratio of the gearbox. The amount of planets may also vary. As the amount of planetary gears improves, the distribution of the strain increases and therefore the torque which can be transmitted. Increasing the number of tooth engagements also decreases the rolling power. Since just part of the total result needs 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 includes a constant size, different ratios could be realized by varying the amount of teeth of sunlight gear and the amount of the teeth of the planetary gears. Small the sun gear, the greater the ratio. Technically, a meaningful ratio range for a planetary stage is usually 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 stages 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 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 pick up the torque via the ring gear. Planetary gearboxes have become extremely important in many regions 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 transmitting ratios may also easily be performed with planetary gearboxes. Because of their positive properties and compact 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 many planetary gears
High efficiency due to low rolling power
Almost unlimited transmission ratio options because of combination of several planet stages
Suitable as planetary switching gear because of fixing this or that part of the gearbox
Possibility of use as overriding gearbox
Favorable volume output
On the surface, it may 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 electric motor needs the result speed decreased and/or torque increased, gears are commonly utilized to accomplish the desired result. Gear “reduction” particularly refers to the quickness of the rotary machine; the rotational rate of the rotary machine is “reduced” by dividing it by a equipment ratio greater than 1:1. A gear ratio greater than 1:1 can be achieved when a smaller equipment (decreased size) with fewer quantity of the teeth meshes and drives a more substantial gear with greater number of teeth.
Gear reduction gets the opposite influence on torque. The rotary machine’s result torque is increased by multiplying the torque by the apparatus ratio, less some effectiveness losses.
While in lots of applications gear reduction reduces speed and boosts torque, in various other applications gear decrease is used to improve velocity and reduce torque. Generators in wind turbines use gear reduction in this manner to convert a relatively slow turbine blade speed to a high speed capable of generating electricity. These applications make use of gearboxes that are assembled opposing of these in applications that reduce rate and increase torque.
How is gear reduction 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 equipment with a certain number of teeth meshes and drives a more substantial gear with a greater number of teeth. The “reduction” or equipment ratio can be calculated by dividing the number of tooth on the large gear by the amount of teeth on the small gear. For instance, if a power motor drives a 13-tooth pinion gear that meshes with a 65-tooth gear, a reduction of 5:1 is achieved (65 / 13 = 5). If the electric motor speed can be 3,450 rpm, the gearbox reduces this velocity by five occasions to 690 rpm. If the motor torque can be 10 lb-in, the gearbox boosts this torque by a factor of five to 50 lb-in (before subtracting out gearbox effectiveness losses).
Parallel shaft gearboxes often contain multiple gear models thereby increasing the apparatus reduction. The full total gear reduction (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 sets, 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 quickness decreased to 57.5 rpm by using a 60:1 gearbox. The 10 lb-in electric electric motor torque would be risen to 600 lb-in (before performance losses).
If a pinion equipment and its mating equipment have the same amount of teeth, no reduction occurs and the gear ratio is 1:1. The gear is called an idler and its 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 gear reducer is much less intuitive since it is dependent upon the amount of teeth of sunlight and band gears. The earth gears become idlers and don’t affect the apparatus ratio. The planetary gear 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 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 pieces can achieve ratios from about 3:1 to about 11:1. If more equipment reduction is necessary, additional planetary stages may be used.
The gear decrease in a right-angle worm drive is dependent on the amount 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 provides 50 teeth, the resulting equipment ratio is 25:1 (50 / 2 = 25).
Whenever a rotary machine such epicyclicas for example an engine or electric electric motor cannot provide the desired output acceleration 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 your gear reduction questions.