epicyclic gearbox

Within 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 equipment takes place 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 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 driving sun pinion can be in the heart of the ring gear, and is coaxially organized with regards to the output. Sunlight pinion is usually attached to a clamping system in order to offer the mechanical connection to the engine shaft. During operation, 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 reason for the planetary gears is to transfer the required torque. The number of teeth has no effect on the transmitting ratio of the gearbox. The amount of planets can also vary. As the amount 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 reduces the rolling power. Since only area of the total result needs to be transmitted as rolling power, a planetary equipment is incredibly efficient. The advantage of a planetary gear compared to a single spur gear lies in 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 amount of teeth of sunlight gear and the amount of the teeth 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, 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 speak of multi-stage gearboxes.
With planetary gearboxes the speeds and torques could be overlaid by having a ring gear that is not set 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 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 should be transmitted with favorable mass inertia ratio adaptation. High transmission ratios can also easily be achieved with planetary gearboxes. Because of the positive properties and compact design, the gearboxes have 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 due to mixture of several planet stages
Ideal as planetary switching gear because of fixing this or that portion of the gearbox
Possibility of use as overriding gearbox
Favorable volume output
Suitability for a wide selection 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 dependable sun and planetary kind of gears arrangement as well as the manual clutch from manual power teach is usually replaced with hydro coupled clutch or torque convertor which made the transmission automatic.
The idea of epicyclic gear box is extracted from the solar system which is known as to the perfect arrangement of objects.
The epicyclic gearbox usually includes the P N R D S (Parking, Neutral, Invert, Drive, Sport) modes which is obtained by fixing of sun and planetary gears according to the require of the drive.
Ever-Power Planetary Gear Motors are an inline option providing high torque in low speeds. Our Planetary Gear Motors offer a high efficiency and provide excellent torque output when compared to other types of equipment motors. They can manage a various load with reduced backlash and are greatest for intermittent duty operation. With endless decrease ratio choices, voltages, and sizes, Ever-Power Products includes a fully tailored gear motor solution for you.
A Planetary Gear Engine from Ever-Power Products features one of our various types of DC motors coupled with one of our uniquely designed epicyclic or planetary gearheads. A planetary gearhead contains an internal gear (sun equipment) that drives multiple outer gears (planet gears) generating torque. Multiple contact factors over the planetary gear train allows for higher torque generation compared to one of our spur equipment motors. Subsequently, an Ever-Power planetary gear motor has the ability to handle various load requirements; the more gear stages (stacks), the higher the load distribution and torque transmitting.
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 result and performance in a concise, low noise design. These characteristics in addition to our value-added capabilities makes Ever-Power s gear motors a fantastic 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 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 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 system. This is how planetary gears acquired 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 the majority of cases the casing is fixed. The generating sun pinion is usually in the heart of the ring gear, and is coaxially organized in relation to the output. Sunlight pinion is usually attached to a clamping system in order to provide the mechanical link with the motor 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 mandatory torque. The amount of teeth does not have any effect on the transmission ratio of the gearbox. The number of planets may also vary. As the amount of planetary gears raises, the distribution of the load increases and then 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 extremely 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.
Provided that the ring gear includes a continuous size, different ratios can be realized by varying the amount of teeth of the sun gear and the number of tooth of the planetary gears. Small the sun gear, the greater the ratio. Technically, a meaningful ratio range for a planetary stage is approx. 3:1 to 10:1, since the planetary gears and sunlight gear are extremely little above and below these ratios. Higher ratios can be obtained by connecting a number of planetary levels in series in the same band gear. In this case, we speak of 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 virtually any direction of rotation. Additionally it is possible to repair 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 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 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 mixture of several planet stages
Ideal as planetary switching gear due to fixing this or that section of the gearbox
Possibility of use as overriding gearbox
Favorable volume output
On the surface, it may 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” particularly refers to the swiftness of the rotary machine; the rotational acceleration of the rotary machine is certainly “decreased” by dividing it by a equipment ratio higher than 1:1. A gear ratio greater than 1:1 can be achieved whenever a smaller gear (reduced size) with fewer amount of teeth meshes and drives a larger gear with greater quantity of teeth.
Gear reduction has the opposite influence on torque. The rotary machine’s output torque is increased by multiplying the torque by the apparatus ratio, less some performance losses.
While in lots of applications gear decrease reduces speed and improves torque, in various other applications gear reduction 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 swiftness to a high speed capable of generating electricity. These applications use gearboxes that are assembled reverse of those in applications that reduce rate and increase torque.
How is gear decrease achieved? Many reducer types are capable of attaining gear reduction including, but not limited to, parallel shaft, planetary and right-angle worm gearboxes. In parallel shaft gearboxes (or reducers), a pinion equipment with a specific number of the teeth meshes and drives a more substantial gear with a greater number of teeth. The “decrease” or equipment ratio can be calculated by dividing the number of tooth on the large equipment by the amount of teeth on the tiny gear. For instance, if a power motor drives a 13-tooth pinion gear that meshes with a 65-tooth equipment, a reduction of 5:1 is achieved (65 / 13 = 5). If the electrical motor speed is certainly 3,450 rpm, the gearbox reduces this velocity by five moments to 690 rpm. If the electric motor torque is 10 lb-in, the gearbox raises this torque by one factor of five to 50 lb-in (before subtracting out gearbox efficiency losses).
Parallel shaft gearboxes often contain multiple gear models thereby increasing the gear reduction. The total gear reduction (ratio) depends upon multiplying each individual equipment ratio from each equipment established stage. If a gearbox includes 3:1, 4:1 and 5:1 gear units, 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 velocity 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 effectiveness losses).
If a pinion gear and its mating gear have the same amount of teeth, no reduction occurs and the apparatus ratio is 1:1. The gear is called an idler and its own principal function is to change the direction of rotation rather than decrease the speed or boost the torque.
Calculating the apparatus ratio in a planetary gear reducer is less intuitive as it is dependent on the number of teeth of the sun and band gears. The earth gears act as idlers and don’t affect the apparatus ratio. The planetary equipment ratio equals the sum of the number of teeth on the sun and ring gear divided by the number of teeth on sunlight gear. For instance, 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 sets can perform ratios from about 3:1 to about 11:1. If more gear reduction is needed, additional planetary stages can 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 amount of teeth on the mating worm wheel. If the worm has two begins and the mating worm wheel offers 50 tooth, the resulting equipment ratio is 25:1 (50 / 2 = 25).
When a rotary machine such as for example an engine or electric motor cannot supply the desired output speed or torque, a equipment reducer may provide a good solution. Parallel shaft, planetary, right-angle worm drives are common gearbox types for attaining gear reduction. Contact Groschopp today with all of your gear reduction questions.