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 equipment occurs 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 could be split into four main constituents.
The housing with integrated internal teeth is actually a ring gear. In nearly all cases the casing is fixed. The driving sun pinion is definitely in the heart of the ring equipment, 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 engine shaft. During operation, the planetary gears, which are installed on a planetary carrier, roll between your sun pinion and the band equipment. The planetary carrier also represents the output 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 tranny ratio of the gearbox. The number of planets may also vary. As the number of planetary gears raises, the distribution of the strain increases and therefore the torque which can be transmitted. Increasing the amount of tooth engagements also decreases the rolling power. Since just area of the total output 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 lies in 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 amount of tooth of the planetary gears. Small the sun gear, the higher the ratio. Technically, a meaningful ratio range for a planetary stage is certainly 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 a number of planetary phases in series in the same ring gear. In cases like this, we speak of multi-stage gearboxes.
With planetary gearboxes the speeds and torques could be overlaid by having a band gear that’s not set but is driven in 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 lots of areas of mechanical engineering.
They have become particularly more developed in areas where high output levels and fast speeds should 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 small 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
Ideal as planetary switching gear due to fixing this or that part 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 equipment box are replaced with an increase of compact and more dependable sun and planetary type of gears arrangement and also the manual clutch from manual power teach is certainly replaced with hydro coupled clutch or torque convertor which made the transmission automatic.
The thought of epicyclic gear box is extracted 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 Gear Motors are an inline answer providing high torque in low speeds. Our Planetary Gear Motors provide a high efficiency and offer excellent torque output in comparison with other types of equipment motors. They can deal with a varying load with minimal backlash and are best for intermittent duty operation. With endless decrease ratio choices, voltages, and sizes, Ever-Power Products includes a fully tailored gear motor solution for you.
A Planetary Gear 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 contains an internal gear (sun equipment) that drives multiple external gears (planet gears) generating torque. Multiple contact factors over the planetary gear train permits higher torque generation compared to among our spur equipment motors. In turn, an Ever-Power planetary equipment motor has the ability to handle various load requirements; the more gear stages (stacks), the higher the strain 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 performance in a compact, low noise design. These characteristics furthermore to our value-added capabilities makes Ever-Power s equipment 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 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 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 split 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 generating sun pinion is in the center of the ring gear, and is coaxially arranged with regards to the output. The sun pinion is usually mounted on a clamping system in order to offer the mechanical link with the motor shaft. During operation, the planetary gears, which are installed 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 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 amount of planetary gears raises, the distribution of the strain increases and therefore the torque which can be transmitted. Increasing the amount of tooth engagements also reduces the rolling power. Since just section of the total result needs to be transmitted as rolling power, a planetary equipment is incredibly efficient. The benefit of a planetary gear compared to a single spur gear is based on this load distribution. Hence, it is feasible to transmit high torques wit
h high efficiency with a concise design using planetary gears.
Provided that the ring gear includes a continuous size, different ratios could be realized by various the number of teeth of the sun gear and the number of tooth of the planetary gears. Small the sun equipment, the higher the ratio. Technically, a meaningful ratio range for a planetary stage is definitely 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 acquired by connecting a number of planetary phases 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 is not fixed but is driven in virtually any direction of rotation. Additionally it is possible to fix the drive shaft to be able to grab the torque via the ring equipment. Planetary gearboxes have grown to be extremely important in lots of regions of mechanical engineering.
They have become particularly well established in areas where high output levels and fast speeds should be transmitted with favorable mass inertia ratio adaptation. High transmission ratios can also easily be performed with planetary gearboxes. Because of their positive properties and small design, the gearboxes have 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 part of the gearbox
Possibility of 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 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 quickness of the rotary machine; the rotational quickness of the rotary machine is usually “decreased” by dividing it by a gear ratio higher than 1:1. A gear ratio higher than 1:1 is certainly achieved whenever a smaller equipment (decreased size) with fewer quantity of tooth meshes and drives a larger gear with greater amount of teeth.
Gear reduction has the opposite influence on torque. The rotary machine’s result torque is improved by multiplying the torque by the apparatus ratio, less some efficiency losses.
While in lots of applications gear reduction reduces speed and increases torque, in various other applications gear decrease is used to increase quickness and reduce torque. Generators in wind generators use gear reduction in this manner to convert a comparatively slow turbine blade quickness to a higher speed capable of generating electricity. These applications make use of gearboxes that are assembled reverse of these in applications that decrease acceleration 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 specific number of 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 tooth on the large equipment by the amount of teeth on the small gear. For example, if a power motor drives a 13-tooth pinion equipment that meshes with a 65-tooth equipment, a reduction of 5:1 is definitely achieved (65 / 13 = 5). If the electrical motor speed is usually 3,450 rpm, the gearbox reduces this swiftness by five instances to 690 rpm. If the engine torque is certainly 10 lb-in, the gearbox increases this torque by a factor of five to 50 lb-in (before subtracting out gearbox efficiency losses).
Parallel shaft gearboxes many times contain multiple gear pieces thereby increasing the apparatus reduction. The full total gear decrease (ratio) depends upon multiplying each individual equipment ratio from each gear set stage. If a gearbox contains 3:1, 4:1 and 5:1 gear sets, 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 engine torque would be increased to 600 lb-in (before efficiency losses).
If a pinion gear and its mating equipment have the same amount of teeth, no reduction occurs and the apparatus ratio is 1:1. The apparatus is called an idler and its own major function is to change the path of rotation rather than reduce the speed or raise the torque.
Calculating the gear ratio in a planetary equipment reducer is less intuitive as it is dependent on the number of teeth of sunlight and ring gears. The earth gears become idlers and don’t affect the apparatus ratio. The planetary gear ratio equals the sum of the number of teeth on sunlight and ring gear divided by the amount of teeth on the sun gear. For example, 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 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 amount of teeth on the mating worm wheel. If the worm has two begins 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 engine cannot provide the desired output acceleration or torque, a gear reducer may provide a great choice. Parallel shaft, planetary, right-angle worm drives are normal gearbox types for attaining gear reduction. Contact Groschopp today with all your gear reduction questions.
