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 occurs in analogy to the orbiting of the planets in the solar system. This is how planetary gears acquired their name.
The elements 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 usually in the center of the ring gear, and is coaxially organized with regards to the output. The sun pinion is usually attached to a clamping system to be able to provide the mechanical connection to the engine shaft. During operation, 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 result shaft of the gearbox.
The sole reason for the planetary gears is to transfer the mandatory torque. The number of teeth does not have any effect on the transmitting ratio of the gearbox. The number of planets can also vary. As the number of planetary gears improves, the distribution of the load increases and then the torque which can be transmitted. Increasing the amount of tooth engagements also reduces the rolling power. Since only portion of the total output has to be transmitted as rolling power, a planetary gear is incredibly efficient. The advantage of a planetary equipment compared to an individual spur gear lies in this load distribution. It is therefore feasible 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 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 is definitely 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 phases 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 fixed but is driven in virtually 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 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 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 due to combination 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 an array of applications
Epicyclic gearbox can be an automatic type gearbox where parallel shafts and gears set up from manual equipment box are replaced with an increase of compact and more reliable sun and planetary kind of gears arrangement and also 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 considered to the perfect 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 answer providing high torque at low speeds. Our Planetary Gear Motors provide a high efficiency and offer excellent torque output in comparison with other types of gear motors. They can handle a different load with reduced backlash and are greatest for intermittent duty procedure. With endless reduction ratio options, voltages, and sizes, Ever-Power Products includes a fully tailored equipment motor remedy for you.
A Planetary Gear Engine from Ever-Power Products features among 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 gear) that drives multiple outer gears (planet gears) generating torque. Multiple contact factors across the planetary gear teach allows for higher torque generation in comparison to among our spur equipment motors. In turn, an Ever-Power planetary equipment 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
Ability to Handle Large Reduction Ratios
High Power Density
Applications
Our Planetary Gear Motors deliver exceptional torque result and performance in a compact, low noise style. These characteristics in addition to our value-added capabilities makes Ever-Power s gear 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 Automobiles (AGV)
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 program. This is how 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 the majority of cases the housing is fixed. The driving sun pinion is definitely in the center 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 provide the mechanical link with the electric motor shaft. During procedure, the planetary gears, which are installed on a planetary carrier, roll between your sunlight pinion and the ring 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 does not have any effect on the transmitting ratio of the gearbox. The amount of planets can also vary. As the number of planetary gears raises, the distribution of the load 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 needs to be transmitted as rolling power, a planetary equipment is extremely efficient. The benefit of a planetary gear compared to a single spur gear is based on this load distribution. It is therefore feasible to transmit high torques wit
h high efficiency with a concise style using planetary gears.
Provided that the ring gear includes a continuous size, different ratios could be realized by varying the number of teeth of the sun gear and the amount of tooth 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 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 ring 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 fixed 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 band equipment. Planetary gearboxes have grown to be extremely important in many regions of mechanical engineering.
They have grown to be particularly well established in areas where high output levels and fast speeds must be transmitted with favorable mass inertia ratio adaptation. High transmission ratios may also easily be achieved with planetary gearboxes. Because of 
the positive properties and small 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 several planetary gears
High efficiency because of low rolling power
Almost unlimited transmission ratio options due to combination of several planet stages
Ideal as planetary switching gear due to fixing this or that area of the gearbox
Chance for 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 an engine or electrical motor needs the output speed decreased and/or torque improved, gears are commonly used to accomplish the required result. Gear “reduction” specifically refers to the speed of the rotary machine; the rotational rate of the rotary machine is “reduced” by dividing it by a gear ratio greater than 1:1. A gear ratio greater than 1:1 is definitely achieved whenever a smaller equipment (reduced size) with fewer quantity of tooth 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 gear ratio, less some performance losses.
While in lots of applications gear decrease reduces speed and raises torque, in other applications gear reduction is used to increase velocity and reduce torque. Generators in wind generators use gear reduction in this manner to convert a comparatively slow turbine blade speed to a high speed capable of generating electricity. These applications use gearboxes that are assembled opposite of those in applications that decrease speed and increase torque.
How is gear decrease achieved? Many reducer types can handle attaining gear reduction including, but not limited to, parallel shaft, planetary and right-angle worm gearboxes. In parallel shaft gearboxes (or reducers), a pinion gear with a certain number of tooth meshes and drives a more substantial gear with a greater number of teeth. The “reduction” or equipment ratio is certainly calculated by dividing the amount of the teeth on the large equipment by the number of teeth on the tiny gear. For example, 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 is definitely 3,450 rpm, the gearbox reduces this rate by five situations to 690 rpm. If the engine torque can be 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 many times contain multiple gear units thereby increasing the apparatus reduction. The full total gear decrease (ratio) is determined by multiplying each individual gear ratio from each equipment established stage. If a gearbox consists of 3:1, 4:1 and 5:1 gear models, the total ratio is 60:1 (3 x 4 x 5 = 60). In our example above, the 3,450 rpm electric electric motor would have its acceleration reduced to 57.5 rpm by using a 60:1 gearbox. The 10 lb-in electric engine torque would be risen to 600 lb-in (before efficiency losses).
If a pinion gear and its mating gear have the same amount of teeth, no reduction occurs and the gear ratio is 1:1. The gear is called an idler and its own main function is to improve the direction of rotation instead of reduce the speed or boost the torque.
Calculating the gear ratio in a planetary equipment reducer is much less intuitive as it is dependent upon the amount of teeth of sunlight and band gears. The planet gears act as idlers and don’t affect the apparatus ratio. The planetary gear 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 instance, a planetary arranged with a 12-tooth sun gear and 72-tooth ring gear includes a gear ratio of 7:1 ([12 + 72]/12 = 7). Planetary gear models can perform ratios from about 3:1 to about 11:1. If more gear 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 begins and the mating worm wheel has 50 teeth, the resulting gear ratio is 25:1 (50 / 2 = 25).
When a rotary machine such as 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 common gearbox types for attaining gear reduction. Get in touch with Groschopp today with all of your gear reduction questions.
