In 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 takes place 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 arranged in relation to the output. Sunlight pinion is usually attached to a clamping system in order to offer the mechanical link with the electric motor shaft. During operation, the planetary gears, which are installed on a planetary carrier, roll between your sun pinion and the ring 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 number of teeth does not have any 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 strain increases and therefore the torque that can be transmitted. Raising the number of tooth engagements also reduces the rolling power. Since only part of the total result needs 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. Hence, it is possible to transmit high torques wit
h high efficiency with a compact design using planetary gears.
So long as the ring gear includes a constant size, different ratios can be realized by different the number of teeth of sunlight gear and the amount of tooth of the planetary gears. Small the sun gear, the greater 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 small above and below these ratios. Higher ratios can be acquired 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 fixed but is driven in any direction of rotation. It is also possible to fix the drive shaft in order to grab the torque via the ring 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 can also easily be performed 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 several planetary gears
High efficiency due to 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 section of the gearbox
Chance for use as overriding gearbox
Favorable volume output
Suitability for a wide range of applications
Epicyclic gearbox is an automatic type gearbox where parallel shafts and gears arrangement from manual gear box are replaced with more compact and more dependable sun and planetary type of gears arrangement and also the manual clutch from manual power train is definitely replaced with hydro coupled clutch or torque convertor which in turn produced the transmission automatic.
The idea of epicyclic gear box is extracted from the solar system which is known as to an ideal 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 based on the require of the drive.
Ever-Power Planetary Gear Motors are an inline answer providing high torque at low speeds. Our Planetary Gear Motors provide a high efficiency and provide excellent torque output when compared to other types of equipment motors. They can handle a varying load with reduced backlash and are best for intermittent duty procedure. With endless decrease ratio choices, voltages, and sizes, Ever-Power Products includes a fully tailored gear motor answer for you.
A Planetary Gear Engine from Ever-Power Items 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 equipment) that drives multiple outer gears (planet gears) generating torque. Multiple contact factors across the planetary gear train permits higher torque generation compared to among our spur equipment motors. Subsequently, an Ever-Power planetary gear motor has the capacity to handle numerous load requirements; the more gear stages (stacks), the bigger the load distribution and torque transmission.
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 efficiency in a compact, low noise style. These characteristics in addition to our value-added features makes Ever-Power s equipment 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 Vehicles (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 system. This is one way planetary gears acquired their name.
The elements of a planetary gear train can 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 generating sun pinion is in the center of the ring gear, and is coaxially arranged with regards to the output. Sunlight pinion is usually mounted on a clamping system to be able to offer the mechanical connection to the engine 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 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 amount of planets may also vary. As the number of planetary gears improves, the distribution of the strain increases and therefore the torque that can be transmitted. Raising 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 equipment is extremely efficient. The benefit of a planetary gear compared to an individual spur gear lies in this load distribution. Hence, it is 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 can be realized by varying the number of teeth of the sun gear and the amount 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 certainly 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 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 band gear that’s not fixed but is driven in virtually any direction of rotation. Additionally it is possible to fix the drive shaft in order to grab the torque via the band gear. Planetary gearboxes have grown to be extremely important in many regions 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 tranny ratios can also easily be performed 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
Nearly unlimited transmission ratio options because of combination of several planet stages
Appropriate as planetary switching gear because of fixing this or that section of the gearbox
Chance for 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 an engine or electric motor needs the result speed decreased and/or torque increased, gears are commonly used to accomplish the required result. Gear “reduction” specifically refers to the acceleration of the rotary machine; the rotational acceleration of the rotary machine is definitely “decreased” by dividing it by a gear ratio greater than 1:1. A gear ratio higher than 1:1 is definitely achieved whenever a smaller gear (decreased 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 gear ratio, less some efficiency losses.
While in many applications gear reduction reduces speed and increases torque, in various other applications gear reduction is used to improve velocity and reduce torque. Generators in wind generators use gear reduction in this manner to convert a relatively slow turbine blade speed to a higher speed capable of generating electricity. These applications make use of gearboxes that are assembled reverse of those in applications that reduce acceleration and increase torque.
How is gear reduction achieved? Many reducer types are capable of attaining gear reduction including, but not limited by, parallel shaft, planetary and right-angle worm gearboxes. In parallel shaft gearboxes (or reducers), a pinion gear with a certain number of the teeth meshes and drives a larger gear with a lot more teeth. The “reduction” or gear ratio is certainly calculated by dividing the number of teeth on the large gear by the amount of teeth on the small gear. For example, if an electric motor drives a 13-tooth pinion equipment that meshes with a 65-tooth gear, a reduced amount of 5:1 is usually achieved (65 / 13 = 5). If the electrical motor speed is certainly 3,450 rpm, the gearbox reduces this quickness by five times 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 efficiency losses).
Parallel shaft gearboxes many times contain multiple gear sets thereby increasing the apparatus reduction. The total gear reduction (ratio) depends upon multiplying each individual gear ratio from each gear established stage. If a gearbox consists of 3:1, 4:1 and 5:1 gear models, 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 rate reduced to 57.5 rpm by using a 60:1 gearbox. The 10 lb-in electric electric motor torque would be increased to 600 lb-in (before efficiency losses).
If a pinion equipment and its mating equipment have the same quantity of teeth, no reduction occurs and the apparatus ratio is 1:1. The gear is called an idler and its own main function is to change the path of rotation rather than reduce the speed or raise the torque.
Calculating the apparatus ratio in a planetary gear reducer is much less intuitive as it is dependent on the amount of teeth of the sun and ring gears. The earth gears act as idlers and don’t affect the gear ratio. The planetary gear ratio equals the sum of the amount of teeth on the sun and ring equipment divided by the amount of teeth on sunlight gear. For instance, a planetary set with a 12-tooth sun gear and 72-tooth ring gear includes a gear ratio of 7:1 ([12 + 72]/12 = 7). Planetary gear pieces can perform ratios from about 3:1 to about 11:1. If more gear reduction is needed, additional planetary stages may be used.
The gear reduction in a right-angle worm drive would depend 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 starts and the mating worm wheel has 50 teeth, the resulting equipment ratio is 25:1 (50 / 2 = 25).
When a rotary machine such as an engine or electric motor cannot provide the desired output swiftness or torque, a equipment reducer may provide a great choice. Parallel shaft, planetary, right-position worm drives are normal gearbox types for achieving gear reduction. Get in touch with Groschopp today with all of your gear reduction questions.