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 gear takes place in analogy to the orbiting of the planets in the solar program. This is how planetary gears obtained their name.
The parts 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 nearly all cases the housing is fixed. The driving sun pinion is certainly in the center of the ring gear, and is coaxially organized in relation to the output. Sunlight pinion is usually attached to a clamping system to be able to provide the mechanical connection to the motor shaft. During procedure, 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 number of teeth has no effect on the tranny ratio of the gearbox. The amount of planets can also vary. As the amount of planetary gears boosts, the distribution of the strain increases and then the torque which can be transmitted. Raising the number 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 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 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 sunlight gear and the number of the teeth of the planetary gears. Small the sun equipment, the greater the ratio. Technically, a meaningful ratio range for a planetary stage is certainly approx. 3:1 to 10:1, since 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 case, we speak of multi-stage gearboxes.
With planetary gearboxes the speeds and torques can be overlaid by having a ring gear that’s not set 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 band gear. Planetary gearboxes have become extremely important in many areas of mechanical engineering.
They have grown to be particularly well established in areas where high output levels and fast speeds should be transmitted with favorable mass inertia ratio adaptation. High transmitting ratios can 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 many planetary gears
High efficiency due to low rolling power
Nearly unlimited transmission ratio options because of combination of several planet stages
Suitable as planetary switching gear because of fixing this or that section of the gearbox
Possibility of use as overriding gearbox
Favorable volume output
Suitability for an array 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 type 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 thought of epicyclic gear box is taken from the solar system which is considered to the perfect arrangement of objects.
The epicyclic gearbox usually comes with 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 remedy providing high torque in low speeds. Our Planetary Gear Motors provide a high efficiency and offer excellent torque output when compared to other types of gear motors. They can manage a different load with reduced backlash and are best for intermittent duty procedure. With endless reduction ratio choices, voltages, and sizes, Ever-Power Products has a fully tailored gear motor alternative for you.
A Planetary Gear Motor from Ever-Power Items features one of our various types of DC motors coupled with one of our uniquely designed epicyclic or planetary gearheads. A planetary gearhead includes an internal gear (sun equipment) that drives multiple outer gears (planet gears) producing torque. Multiple contact points over the planetary gear train allows for higher torque generation compared to one of our spur equipment motors. In turn, an Ever-Power planetary equipment 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 Equipment Motors deliver exceptional torque output and effectiveness in a compact, low noise style. 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 exterior teeth on a concentric orbit. The circulation of the spur gear takes place in analogy to the orbiting of the planets in the solar system. This is one way planetary gears obtained their name.
The elements of a planetary gear train can be split into four main constituents.
The housing with integrated internal teeth is actually a ring gear. In nearly all cases the housing is fixed. The driving sun pinion is definitely in the heart of the ring equipment, and is coaxially arranged in relation to the output. The sun pinion is usually mounted on a clamping system in order to provide the mechanical link with the motor shaft. During operation, the planetary gears, which are installed on a planetary carrier, roll between the sunlight pinion and the band equipment. The planetary carrier also represents the result shaft of the gearbox.
The sole purpose of the planetary gears is to transfer the required torque. The number of teeth has no effect on the transmission ratio of the gearbox. The number of planets may also vary. As the amount of planetary gears boosts, the distribution of the strain increases and then the torque that can be transmitted. Increasing the amount of tooth engagements also reduces the rolling power. Since just portion of the total output needs to be transmitted as rolling power, a planetary equipment is extremely efficient. The advantage of a planetary equipment 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 compact style using planetary gears.
Provided that the ring gear includes a constant size, different ratios can be realized by various the number of teeth of sunlight gear and the amount of the teeth of the planetary gears. Small the sun gear, the higher 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 small above and below these ratios. Higher ratios can be obtained by connecting many planetary stages in series in the same band 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 is not set 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 band equipment. Planetary gearboxes have grown to be 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 may also easily be performed with planetary gearboxes. Because of the positive properties and small 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 several planetary gears
High efficiency due to low rolling power
Nearly unlimited transmission ratio options because of combination of several planet stages
Ideal as planetary switching gear because of fixing this or that part 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. Whenever a rotary machine such as for example an engine or electric motor needs the output speed reduced and/or torque improved, gears are commonly used to accomplish the required result. Gear “reduction” specifically refers to the swiftness of the rotary machine; the rotational velocity of the rotary machine can be “decreased” by dividing it by a equipment ratio greater than 1:1. A gear ratio higher than 1:1 is usually achieved when a smaller gear (reduced size) with fewer number of tooth meshes and drives a more substantial gear with greater number of teeth.
Gear reduction has the opposite effect on torque. The rotary machine’s output torque is improved by multiplying the torque by the apparatus ratio, less some effectiveness losses.
While in many applications gear reduction reduces speed and increases torque, in additional applications gear decrease is used to increase speed and reduce torque. Generators in wind turbines use gear reduction in this fashion to convert a relatively slow turbine blade swiftness to a higher speed capable of generating electricity. These applications use gearboxes that are assembled opposing of these in applications that reduce quickness and increase torque.
How is gear reduction achieved? Many reducer types can handle attaining gear reduction including, but not limited by, parallel shaft, planetary and right-position 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 greater number of teeth. The “decrease” or gear ratio is definitely calculated by dividing the number of teeth on the large equipment by the amount of teeth on the small 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 can be achieved (65 / 13 = 5). If the electric motor speed is usually 3,450 rpm, the gearbox reduces this speed by five times to 690 rpm. If the electric motor torque is usually 10 lb-in, the gearbox increases this torque by one factor of five to 50 lb-in (before subtracting out gearbox effectiveness losses).
Parallel shaft gearboxes often contain multiple gear models thereby increasing the apparatus reduction. The full total gear reduction (ratio) is determined by multiplying each individual equipment ratio from each equipment 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). Inside our example above, the 3,450 rpm electric engine would have its rate decreased 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 gear and its mating gear have the same quantity of teeth, no reduction occurs and the apparatus ratio is 1:1. The gear is named an idler and its principal function is to change the direction of rotation rather than decrease the speed or raise the torque.
Calculating the gear ratio in a planetary equipment reducer is much less intuitive as it is dependent on the amount of teeth of the sun and ring gears. The earth gears become 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 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 models can achieve ratios from about 3:1 to about 11:1. If more gear reduction is needed, additional planetary stages may be used.
The gear decrease 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 begins and the mating worm wheel provides 50 teeth, the resulting gear ratio is 25:1 (50 / 2 = 25).
When a rotary machine such as for example an engine or electric electric motor cannot provide the desired output velocity or torque, a gear reducer may provide a great choice. Parallel shaft, planetary, right-angle worm drives are common gearbox types for attaining gear reduction. Contact Groschopp today with all your gear reduction questions.