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 how planetary gears acquired their name.
The elements of a planetary gear train could 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 generating sun pinion is certainly in the heart of the ring equipment, and is coaxially arranged in relation 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 mounted on a planetary carrier, roll between your sunlight pinion and the band gear. 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 amount of teeth has no effect on the transmission ratio of the gearbox. The number of planets can also vary. As the number of planetary gears boosts, the distribution of the load increases and therefore the torque that can be transmitted. Increasing the number of tooth engagements also decreases the rolling power. Since only area of the total result has to be transmitted as rolling power, a planetary gear is extremely efficient. The benefit of a planetary equipment compared to an individual spur gear is based on this load distribution. Hence, it is feasible to transmit high torques wit
h high efficiency with a compact style using planetary gears.
Provided that the ring gear has a constant size, different ratios could be realized by various the amount 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 can be 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 several planetary phases in series in the same band 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 any direction of rotation. Additionally it is possible to repair the drive shaft to be able to pick up the torque via the band equipment. Planetary gearboxes have grown to be extremely important in many 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 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 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
Possibility of use as overriding gearbox
Favorable volume output
Suitability for a wide selection of applications
Epicyclic gearbox is an automatic type gearbox in which parallel shafts and gears arrangement from manual gear box are replaced with an increase of compact and more dependable sun and planetary kind of gears arrangement and also the manual clutch from manual power teach can be 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 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 according to the need of the drive.
Ever-Power Planetary Equipment Motors are an inline solution providing high torque at low speeds. Our Planetary Gear Motors offer a high efficiency and offer excellent torque output when compared to other types of equipment motors. They can deal with a varying load with minimal backlash and are greatest for intermittent duty operation. With endless decrease ratio options, voltages, and sizes, Ever-Power Products includes a fully tailored equipment motor remedy for you.
A Planetary Gear Electric motor 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 internal gear (sun equipment) that drives multiple outer gears (planet gears) producing torque. Multiple contact factors across the planetary gear train allows for higher torque generation in comparison 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 efficiency in a concise, low noise design. These characteristics in addition to our value-added features 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 Vehicles (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 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 nearly all cases the housing is fixed. The driving sun pinion is certainly in the heart of the ring equipment, and is coaxially organized with regards to the output. The sun pinion is usually mounted on a clamping system in order to offer the mechanical connection to the engine shaft. During operation, the planetary gears, which are mounted on a planetary carrier, roll between the sun pinion and the ring 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 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 improves, the distribution of the load increases and therefore the torque which can be transmitted. Raising the amount of tooth engagements also decreases the rolling power. Since only part of the total result needs to be transmitted as rolling power, a planetary gear is incredibly efficient. The advantage of a planetary equipment 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 compact design using planetary gears.
Provided that the ring gear has a continuous size, different ratios can be realized by various the number of teeth of the sun gear and the amount of tooth of the planetary gears. The smaller the sun equipment, the higher the ratio. Technically, a meaningful ratio range for a planetary stage is definitely 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 stages 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 any direction of rotation. Additionally it is possible to repair the drive shaft to be able to pick up the torque via the band equipment. 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 must be transmitted with favorable mass inertia ratio adaptation. High tranny ratios may also easily be achieved with planetary gearboxes. Because of their 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 because of low rolling power
Nearly unlimited transmission ratio options due to combination of several planet stages
Suitable as planetary switching gear because of fixing this or that portion of the gearbox
Chance for 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. Whenever a rotary machine such as an engine or electrical motor needs the output speed reduced and/or torque increased, gears are commonly utilized to accomplish the required result. Gear “reduction” particularly refers to the swiftness of the rotary machine; the rotational velocity of the rotary machine is definitely “reduced” by dividing it by a gear ratio higher than 1:1. A gear ratio higher than 1:1 is achieved whenever a smaller equipment (reduced size) with fewer number of tooth meshes and drives a more substantial 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 effectiveness losses.
While in lots of applications gear decrease reduces speed and boosts torque, in other applications gear decrease is used to improve swiftness and reduce torque. Generators in wind turbines use gear reduction in this manner to convert a comparatively slow turbine blade rate to a high speed capable of generating electricity. These applications use gearboxes that are assembled opposing of these in applications that reduce speed 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 greater number of teeth. The “decrease” or gear ratio is calculated by dividing the number of teeth on the large equipment by the amount of teeth on the tiny gear. For example, if a power motor drives a 13-tooth pinion equipment that meshes with a 65-tooth gear, a reduction of 5:1 is achieved (65 / 13 = 5). If the electric motor speed is definitely 3,450 rpm, the gearbox reduces this swiftness by five moments to 690 rpm. If the motor torque is certainly 10 lb-in, the gearbox increases this torque by a factor of five to 50 lb-in (before subtracting out gearbox performance losses).
Parallel shaft gearboxes many times contain multiple gear units thereby increasing the gear reduction. The full total gear reduction (ratio) depends upon multiplying each individual equipment ratio from each gear arranged stage. If a gearbox consists of 3:1, 4:1 and 5:1 gear sets, 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 quickness 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 equipment have the same number of teeth, no reduction occurs and the apparatus ratio is 1:1. The gear is named an idler and its own main function is to change the direction of rotation instead of decrease the speed or raise 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 gear ratio. The planetary equipment ratio equals the sum of the number of teeth on the sun and ring equipment divided by the number of teeth on the sun gear. For example, a planetary set with a 12-tooth sun gear and 72-tooth ring gear has a gear 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 necessary, 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 number of teeth on the mating worm wheel. If the worm has two starts and the mating worm wheel offers 50 teeth, the resulting gear ratio is 25:1 (50 / 2 = 25).
Whenever a rotary machine such as for example an engine or electric engine cannot supply the desired output quickness or torque, a gear reducer may provide a great choice. Parallel shaft, planetary, right-angle worm drives are normal gearbox types for achieving gear reduction. Contact Groschopp today with all your gear reduction questions.
