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 obtained their name.
The parts of a planetary gear train could 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 in the heart of the ring gear, and is coaxially arranged in relation to the output. Sunlight pinion is usually mounted on a clamping system to be able to provide the mechanical link with the electric motor shaft. During procedure, the planetary gears, which are mounted on a planetary carrier, roll between the sun 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 required torque. The amount of teeth has no effect on the tranny ratio of the gearbox. The amount 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. Raising the amount of tooth engagements also reduces the rolling power. Since only section of the total result has to be transmitted as rolling power, a planetary gear is incredibly efficient. The benefit of a planetary equipment 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 concise design using planetary gears.
So long as the ring gear includes a constant size, different ratios could 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 greater the ratio. Technically, a meaningful ratio range for a planetary stage is 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 obtained by connecting a number of planetary levels 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 band gear that is not set but is driven in any direction of rotation. Additionally it is possible to repair the drive shaft in order to pick up the torque via the band gear. Planetary gearboxes have grown to be extremely important in many regions 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 transmitting ratios can also easily be achieved with planetary gearboxes. Because of their positive properties and compact design, the gearboxes possess many potential uses in commercial applications.
The benefits 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 because of mixture of several planet stages
Suitable as planetary switching gear because of 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 where parallel shafts and gears arrangement from manual equipment box are replaced with more compact and more reliable sun and planetary kind of gears arrangement as well as the manual clutch from manual power train can be 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 comes with the P N R D S (Parking, Neutral, Reverse, 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 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 deal with a varying load with reduced backlash and are best for intermittent duty procedure. With endless reduction ratio options, voltages, and sizes, Ever-Power Products has a fully tailored gear motor option for you.
A Planetary Gear Motor from Ever-Power Products features one of our various types of DC motors in conjunction with among 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 across the planetary gear train permits higher torque generation in comparison to among our spur gear motors. Subsequently, an Ever-Power planetary equipment motor has the ability to handle numerous load requirements; the more equipment stages (stacks), the bigger the load distribution and torque transmitting.
Features and Benefits
High Torque Capabilities
Sleek Inline Design
High Efficiency
Ability 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 in addition to our value-added features 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 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 external 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 obtained their name.
The components of a planetary gear train could 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 in the heart of the ring gear, and is coaxially arranged with regards to the output. The sun pinion is usually mounted on a clamping system to be able to offer the mechanical link with the motor shaft. During operation, 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 reason for 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 number of planetary gears raises, the distribution of the load increases and therefore the torque that can be transmitted. Raising the number of tooth engagements also decreases the rolling power. Since only portion 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 an individual spur gear lies in this load distribution. It is therefore possible to transmit high torques wit
h high efficiency with a concise design using planetary gears.
Provided that the ring gear has a continuous size, different ratios can be realized by different the number of teeth of sunlight gear and the number of the teeth of the planetary gears. The smaller the sun gear, the higher 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 obtained by connecting several planetary stages in series in the same band gear. In this instance, we talk about multi-stage gearboxes.
With planetary gearboxes the speeds and torques can be overlaid by having a band gear that’s not set but is driven in any direction of rotation. It is also possible to fix the drive shaft to be able to grab 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 may also easily be achieved with planetary gearboxes. Because of the positive properties and small design, the gearboxes possess 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 due to low rolling power
Nearly unlimited transmission ratio options due to combination of several planet stages
Appropriate as planetary switching gear because of fixing this or that area of the gearbox
Possibility of 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. When 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 required result. Gear “reduction” specifically refers to the rate of the rotary machine; the rotational swiftness of the rotary machine is definitely “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 (reduced size) with fewer quantity of the teeth meshes and drives a larger gear with greater quantity 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 efficiency losses.
While in lots of applications gear decrease reduces speed and increases torque, in additional applications gear decrease is used to increase quickness and reduce torque. Generators in wind turbines use gear decrease in this manner to convert a relatively slow turbine blade speed to a higher speed capable of generating electricity. These applications use gearboxes that are assembled reverse of those in applications that decrease quickness and increase torque.
How is gear decrease achieved? Many reducer types can handle 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 tooth meshes and drives a more substantial gear with a lot more teeth. The “decrease” or equipment ratio is certainly calculated by dividing the number of tooth on the large gear by the number of teeth on the tiny gear. For instance, if an electric motor drives a 13-tooth pinion equipment 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 rate by five instances to 690 rpm. If the 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 units thereby increasing the apparatus reduction. The total gear decrease (ratio) depends upon multiplying each individual equipment ratio from each gear established stage. If a gearbox contains 3:1, 4:1 and 5:1 gear pieces, the total ratio is 60:1 (3 x 4 x 5 = 60). In our example above, the 3,450 rpm electric motor would have its rate decreased to 57.5 rpm by using a 60:1 gearbox. The 10 lb-in electric motor torque would be increased to 600 lb-in (before effectiveness losses).
If a pinion equipment and its mating equipment 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 main function is to change the path of rotation instead of reduce the speed or increase the torque.
Calculating the apparatus ratio in a planetary equipment reducer is less intuitive as it is dependent upon the amount of teeth of the sun and band gears. The planet gears become idlers and don’t affect the apparatus ratio. The planetary gear 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 instance, 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 sets can perform ratios from about 3:1 to about 11:1. If more equipment reduction is needed, additional planetary stages can 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 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 for example an engine or electric motor cannot provide the desired output acceleration or torque, a gear reducer may provide a great choice. Parallel shaft, planetary, right-position worm drives are normal gearbox types for attaining gear reduction. Contact Groschopp today with all your gear reduction questions.