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 parts 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 the majority of cases the casing is fixed. The generating sun pinion is certainly in the center of the ring gear, and is coaxially organized in relation to the output. Sunlight pinion is usually attached to a clamping system to be able to provide the mechanical connection to the engine shaft. During procedure, the planetary gears, which are installed on a planetary carrier, roll between the sun pinion and the ring gear. The planetary carrier also represents the output 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 transmission ratio of the gearbox. The amount of planets can also vary. As the number of planetary gears increases, the distribution of the load increases and therefore the torque that can be transmitted. Raising the number of tooth engagements also reduces the rolling power. Since only section of the total output has to be transmitted as rolling power, a planetary gear is incredibly efficient. The advantage of a planetary gear 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 design using planetary gears.
So long as the ring gear has a continuous size, different ratios could be realized by different the number of teeth of the sun gear and the number of tooth of the planetary gears. The smaller the sun equipment, the greater the ratio. Technically, a meaningful ratio range for a planetary stage can be approx. 3:1 to 10:1, because the planetary gears and sunlight gear are extremely little above and below these ratios. Higher ratios can be acquired by connecting several planetary levels 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. 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 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 transmission ratios can also easily be achieved with planetary gearboxes. Because of their positive properties and compact design, the gearboxes have 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
Almost unlimited transmission ratio options due to 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 an array of applications
Epicyclic gearbox can be an automatic type gearbox in which parallel shafts and gears set up from manual equipment box are replaced with an increase of compact and more dependable sun and planetary type of gears arrangement and also the manual clutch from manual power train is replaced with hydro coupled clutch or torque convertor which in turn produced the transmission automatic.
The idea of epicyclic gear box is taken 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, Reverse, Drive, Sport) settings which is obtained by fixing of sun and planetary gears based on the require of the drive.
Ever-Power Planetary Equipment Motors are an inline alternative providing high torque at low speeds. Our Planetary Gear Motors provide a high efficiency and provide excellent torque output in comparison with other types of equipment motors. They can manage a varying load with reduced backlash and are greatest for intermittent duty procedure. With endless decrease ratio options, voltages, and sizes, Ever-Power Products has a fully tailored equipment motor remedy for you.
A Planetary Gear Electric motor from Ever-Power Items features among our numerous kinds of DC motors coupled with one of our uniquely designed epicyclic or planetary gearheads. A planetary gearhead includes an internal gear (sun gear) that drives multiple outer gears (planet gears) producing torque. Multiple contact factors over the planetary gear teach 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 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 concise, low noise design. These characteristics furthermore to our value-added capabilities makes Ever-Power s equipment motors a great 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 Vehicles (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 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 acquired their name.
The components of a planetary gear train can be divided 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 heart of the ring equipment, and is coaxially arranged in relation to the output. Sunlight pinion is usually mounted on a clamping system in order to provide the mechanical connection to the electric motor shaft. During procedure, the planetary gears, which are installed 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 purpose of the planetary gears is to transfer the mandatory torque. The amount of teeth does not have any effect on the transmitting ratio of the gearbox. The amount of planets may also vary. As the number of planetary gears boosts, the distribution of the load increases and therefore the torque which 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 equipment is incredibly efficient. The benefit of a planetary gear compared to a single spur gear is based on this load distribution. It is therefore possible to transmit high torques wit
h high efficiency with a compact style using planetary gears.
So long as the ring gear has a continuous size, different ratios could be realized by various the number of teeth of the sun gear and the number of teeth of the planetary gears. The smaller the sun gear, the greater the ratio. Technically, a meaningful ratio range for a planetary stage can be 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 band gear. In this case, we talk about multi-stage gearboxes.
With planetary gearboxes the speeds and torques can be overlaid by having a ring gear that’s not set but is driven in virtually any direction of rotation. It is also possible to fix the drive shaft in order to pick up the torque via the ring equipment. Planetary gearboxes have grown to be 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 transmission ratios can also easily be achieved with planetary gearboxes. Because of their positive properties and compact design, the gearboxes possess 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
Almost unlimited transmission ratio options due to combination of several planet stages
Appropriate as planetary switching gear due to fixing this or that part 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 electric motor needs the result speed reduced and/or torque improved, gears are commonly utilized to accomplish the desired result. Gear “reduction” specifically refers to the speed of the rotary machine; the rotational speed of the rotary machine is usually “reduced” by dividing it by a equipment ratio greater than 1:1. A gear ratio higher than 1:1 can be achieved whenever a smaller equipment (decreased size) with fewer number of the teeth 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 effectiveness losses.
While in lots of applications gear decrease reduces speed and boosts torque, in other applications gear reduction is used to increase rate and reduce torque. Generators in wind generators use gear reduction in this manner to convert a relatively slow turbine blade swiftness to a high speed capable of generating electricity. These applications use gearboxes that are assembled reverse of those in applications that reduce swiftness and increase torque.
How is gear reduction achieved? Many reducer types can handle attaining gear decrease including, but not limited to, parallel shaft, planetary and right-angle worm gearboxes. In parallel shaft gearboxes (or reducers), a pinion equipment with a certain number of tooth meshes and drives a more substantial gear with a lot more teeth. The “reduction” or equipment ratio is usually calculated by dividing the amount of tooth on the large equipment by the amount of teeth on the small gear. For example, if an electric motor drives a 13-tooth pinion gear that meshes with a 65-tooth gear, a reduced amount of 5:1 is usually achieved (65 / 13 = 5). If the electric motor speed is usually 3,450 rpm, the gearbox reduces this swiftness by five moments to 690 rpm. If the motor torque is definitely 10 lb-in, the gearbox improves this torque by one factor of five to 50 lb-in (before subtracting out gearbox performance losses).
Parallel shaft gearboxes often contain multiple gear units thereby increasing the apparatus reduction. The total gear decrease (ratio) depends upon multiplying each individual gear ratio from each gear established stage. If a gearbox includes 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 motor would have its quickness decreased to 57.5 rpm by utilizing 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 gear and its mating gear have the same quantity of teeth, no reduction occurs and the gear ratio is 1:1. The gear is named an idler and its own principal function is to improve the direction of rotation rather than decrease the speed or raise the torque.
Calculating the apparatus 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 act as idlers and do not affect the apparatus ratio. The planetary equipment ratio equals the sum of the number of teeth on sunlight and ring gear divided by the amount of teeth on the sun gear. For instance, a planetary set with a 12-tooth sun gear and 72-tooth ring gear includes 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 equipment reduction is needed, additional planetary stages may be used.
The gear reduction in a right-angle worm drive is dependent 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 provides 50 teeth, the resulting gear ratio is 25:1 (50 / 2 = 25).
When a rotary machine such as for example an engine or electric engine cannot provide the desired output velocity or torque, a equipment reducer may provide a great choice. Parallel shaft, planetary, right-angle worm drives are common gearbox types for achieving gear reduction. Get in touch with Groschopp today with all of your gear reduction questions.