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An assembly of meshed gears comprising a central or sun equipment, a coaxial internal or ring gear, and a number of Planetary Gear Transmission intermediate pinions supported upon a revolving carrier. Occasionally the term planetary gear teach is utilized broadly as a synonym for epicyclic gear train, or narrowly to point that the ring equipment is the fixed member. In a simple planetary gear train the pinions mesh at the same time with both coaxial gears (discover illustration). With the central equipment set, a pinion rotates about it as a world rotates about its sunlight, and the gears are named appropriately: the central gear may be the sunlight, and the pinions will be the planets.
This is a concise, ‘single’ stage planetary gearset where in fact the output is derived from another ring gear varying a few teeth from the primary.
With the initial model of 18 sun teeth, 60 band teeth, and 3 planets, this led to a ‘single’ stage gear reduced amount of -82.33:1.
A normal planetary gearset of the size could have a reduction ratio of 4.33:1.
That is a good deal of torque in a little package.
At Nominal Voltage
Voltage (Nominal) 12V
Voltage Range (Recommended) 3V – 12V
Speed (No Load)* 52 rpm
Current (No Load)* 0.21A
Current (Stall)* 4.9A
Torque (Stall)* 291.6 oz-in (21 kgf-cm)
Gear Ratio 231:1
Gear Material Metal
Gearbox Style Planetary
Motor Type DC
Output Shaft Diameter 4mm (0.1575”)
Output Shaft Style D-shaft
Output Shaft Support Dual Ball Bearing
Electrical Connection Male Spade Terminal
Operating Temperature -10 ~ +60°C
Mounting Screw Size M2 x 0.4mm
Product Weight 100g (3.53oz)
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 occurs 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 could 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 generating sun pinion is usually in the center of the ring gear, 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 engine shaft. During operation, 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 mandatory torque. The amount of teeth does not have any effect on the transmission ratio of the gearbox. The amount of planets may also vary. As the amount of planetary gears raises, 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 portion of the total output has to be transmitted as rolling power, a planetary gear is incredibly efficient. The advantage 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 compact style using planetary gears.
So long as the ring gear has a constant size, different ratios could be realized by varying the amount of teeth of sunlight gear and the amount of the 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, since 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 phases in series in the same band gear. In cases like this, 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 virtually any direction of rotation. Additionally it is possible to fix the drive shaft to be able to pick up the torque via the ring equipment. Planetary gearboxes have grown to be 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 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
Almost unlimited transmission ratio options because of mixture 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
Suitability for a wide variety of applications
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 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 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 installed on a planetary carrier, roll between the sun 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 amount of teeth does not have any effect on the tranny ratio of the gearbox. The amount of planets may 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 amount of teeth of the sun gear and the amount of teeth of the planetary gears. The smaller the sun equipment, the higher 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’s not set 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 band equipment. 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 may 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 teach can be replaced with hydro coupled clutch or torque convertor which produced 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.
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 occurs in analogy to the orbiting of the planets in the solar program. This is one way planetary gears obtained their name.
The elements 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 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 to be able to provide the mechanical connection to the 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 reason for 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 number of planets may also vary. As the amount of planetary gears improves, 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 only part of the total result has to be transmitted as rolling power, a planetary gear is incredibly efficient. The advantage of a planetary gear compared to a single spur gear lies in this load distribution. Hence, it is feasible to transmit high torques wit
h high efficiency with a compact design using planetary gears.
So long as the ring gear has a continuous size, different ratios could be realized by various the amount of teeth of the sun gear and the number of teeth of the planetary gears. Small the sun gear, the greater the ratio. Technically, a meaningful ratio range for a planetary stage can be 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 acquired by connecting many 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’s not fixed but is driven in virtually any direction of rotation. It is also possible to fix the drive shaft to be able to grab the torque via the band gear. Planetary gearboxes have become extremely important in many areas 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 may also easily be performed with planetary gearboxes. Because of the positive properties and compact design, the gearboxes have many potential uses in industrial applications.
The advantages of planetary gearboxes:
Coaxial arrangement of input shaft and output shaft
Load distribution to many planetary gears
High efficiency because of 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 part of the gearbox
Possibility of use as overriding gearbox
Favorable volume output
In a planetary gearbox, many teeth are engaged at once, that allows high speed reduction to be achieved with relatively small gears and lower inertia reflected back again to the engine. Having multiple teeth talk about the load also enables planetary gears to transmit high levels of torque. The mixture of compact size, large speed reduction and high torque transmission makes planetary gearboxes a favorite choice for space-constrained applications.
But planetary gearboxes do have some disadvantages. Their complexity in design and manufacturing can make them a far more expensive alternative than additional gearbox types. And precision production is really important for these gearboxes. If one planetary equipment is put closer to the sun gear than the others, imbalances in the planetary gears may appear, resulting in premature wear and failing. Also, the compact footprint of planetary gears makes heat dissipation more difficult, therefore applications that operate at very high speed or encounter continuous procedure may require cooling.
When using a “standard” (i.electronic. inline) planetary gearbox, the motor and the driven equipment should be inline with one another, although manufacturers provide right-angle designs that integrate other gear sets (often bevel gears with helical teeth) to provide an offset between your input and output.
Input power (max)27 kW (36 hp)
Input speed (max)2800 rpm2
Output torque (intermittent)12,880 Nm(9,500 lb-ft)
Output torque (continuous)8,135 Nm (6,000 lb-ft)
1 Actual ratio is dependent on the drive configuration.
2 Max input speed related to ratio and max result speed
3 Max radial load positioned at optimum load position
4 Weight varies with configuration and ratio selected
5 Requires tapered roller planet bearings (unavailable with all ratios)
Approximate dry weight100 -181 kg (220 – 400 lb)4
Radial load (max)14,287kg (31,500 lb)3
Drive typeSpeed reducer
Hydraulic engine input SAE C or D hydraulic
A planetary transmission program (or Epicyclic system as it is also known), consists normally of a centrally pivoted sunlight gear, a ring gear and several world gears which rotate between these.
This assembly concept explains the word planetary transmission, as the planet gears rotate around sunlight gear as in the astronomical sense the planets rotate around our sun.
The benefit of a planetary transmission depends upon load distribution over multiple planet gears. It is thereby feasible to transfer high torques utilizing a compact design.
Gear assembly 1 and gear assembly 2 of the Ever-Power 500/14 possess two selectable sunlight gears. The first gear stage of the stepped planet gears engages with sunlight gear #1. The second gear step engages with sunlight gear #2. With sun gear one or two 2 coupled to the axle,or the coupling of sunlight equipment 1 with the band gear, three ratio variants are achievable with each equipment assembly.
Direct Gear 1:1
Example Gear Assy (1) and (2)
With direct equipment selected in equipment assy (1) or (2), sunlight gear 1 is coupled with the ring gear in gear assy (1) or gear assy (2) respectively. Sunlight gear 1 and band gear then rotate jointly at the same speed. The stepped world gears do not unroll. Thus the gear ratio is 1:1.
Gear assy (3) aquires direct gear predicated on the same principle. Sunlight gear 3 and ring gear 3 are directly coupled.
Many “gears” are used for automobiles, however they are also utilized for many various other machines. The most frequent one may be the “tranny” that conveys the energy of engine to tires. There are broadly two functions the transmission of an automobile plays : one is definitely to decelerate the high rotation acceleration emitted by the engine to transmit to tires; the various other is to improve the reduction ratio relative to the acceleration / deceleration or traveling speed of an automobile.
The rotation speed of an automobile’s engine in the overall state of driving amounts to 1 1,000 – 4,000 rotations each and every minute (17 – 67 per second). Because it is unattainable to rotate tires with the same rotation swiftness to perform, it is required to lower the rotation speed using the ratio of the amount of gear teeth. Such a role is called deceleration; the ratio of the rotation speed of engine and that of tires is called the reduction ratio.
Then, exactly why is it necessary to change the reduction ratio relative to the acceleration / deceleration or driving speed ? It is because substances require a large force to begin moving however they usually do not require this kind of a huge force to excersice once they have began to move. Automobile can be cited as an example. An engine, however, by its nature can’t so finely change its output. Consequently, one adjusts its result by changing the decrease ratio utilizing a transmission.
The transmission of motive power through gears very much resembles the principle of leverage (a lever). The ratio of the number of the teeth of gears meshing with one another can be deemed as the ratio of the space of levers’ arms. That is, if the reduction ratio is huge and the rotation acceleration as output is low in comparison to that as insight, the energy output by transmitting (torque) will be large; if the rotation swiftness as output isn’t so lower in comparison to that as insight, however, the energy output by transmitting (torque) will be small. Thus, to improve the reduction ratio utilizing transmitting is much akin to the principle of moving things.
Then, how does a transmitting change the reduction ratio ? The answer lies in the system called a planetary gear mechanism.
A planetary gear mechanism is a gear mechanism consisting of 4 components, namely, sunlight gear A, several world gears B, internal gear C and carrier D that connects planet gears as observed in the graph below. It has a very complex framework rendering its style or production most challenging; it can recognize the high reduction ratio through gears, however, it is a mechanism suitable for a reduction mechanism that requires both small size and powerful such as transmission for automobiles.
The planetary speed reducer & gearbox is some sort of transmission mechanism. It utilizes the acceleration transducer of the gearbox to lessen the turnover amount of the electric motor to the required one and get a large torque. How really does a planetary gearbox work? We are able to find out more about it from the structure.
The primary transmission structure of the planetary gearbox is planet gears, sun gear and ring gear. The ring gear is positioned in close get in touch with with the inner gearbox case. The sun gear driven by the external power lies in the center of the ring gear. Between the sun gear and band gear, there is a planetary equipment set comprising three gears similarly built-up at the planet carrier, which is usually floating among them relying on the support of the output shaft, ring equipment and sun equipment. When sunlight equipment is actuated by the input power, the earth gears will be driven to rotate and then revolve around the center together with the orbit of the ring gear. The rotation of the planet gears drives the result shaft connected with the carrier to result the power.
Planetary speed reducer applications
Planetary speed reducers & gearboxes have a whole lot of advantages, like small size, light-weight, high load capability, long service life, high reliability, low noise, large output torque, wide range of speed ratio, high efficiency and so forth. Besides, the planetary speed reducers gearboxes in Ever-Power are designed for square flange, which are easy and easy for installation and ideal for AC/DC servo motors, stepper motors, hydraulic motors etc.
Due to these advantages, planetary gearboxes are applicable to the lifting transportation, engineering machinery, metallurgy, mining, petrochemicals, structure machinery, light and textile market, medical equipment, device and gauge, automobile, ships, weapons, aerospace and other industrial sectors.
The primary reason to employ a gearhead is that it creates it possible to regulate a big load inertia with a comparatively small motor inertia. Without the gearhead, acceleration or velocity control of the load would require that the electric motor torque, and therefore current, would have to be as much times better as the reduction ratio which can be used. Moog offers a selection of windings in each framework size that, coupled with an array of reduction ratios, provides an assortment of solution to output requirements. Each combination of electric motor and gearhead offers unique advantages.
Precision Planetary Gearheads
gearheads
32 mm Low Cost Planetary Gearhead
32 mm Precision Planetary Gearhead
52 mm Precision Planetary Gearhead
62 mm Precision Planetary Gearhead
81 mm Precision Planetary Gearhead
120 mm Precision Planetary Gearhead
Planetary gearheads are ideal for transmitting high torques as high as 120 Nm. Generally, the larger gearheads come with ball bearings at the gearhead result.
Properties of the Ever-Power planetary gearhead:
– For transmission of high torques up to 180 Nm
– Reduction ratios from 4:1 to 6285:1
– High performance in the tiniest of spaces
– High reduction ratio in an extremely small package
– Concentric gearhead insight and output
Versions:
– Plastic version
– Ceramic version
– High-power gearheads
– Heavy-duty gearheads
– Gearheads with minimal backlash
80mm size inline planetary reducer for NEMA34 (flange 86mm) or NEMA42 stepper motor. Precision less than 18 Arcmin. High torque, small size and competitive cost. The 16mm shaft diameter ensures balance in applications with belt tranny. Fast installation for your equipment.
80mm size inline planetary reducer for NEMA34 (flange 86mm) or NEMA42 stepper motor. Precision less than 18 Arcmin. High torque, compact size and competitive cost. The 16mm shaft diameter ensures balance in applications with belt transmission. Fast installation for your equipment.
1. Planetary ring gear material: metal steel
2. Bearing at result type: Ball bearing
3. Max radial load (12mm distance from flange): 550N
4. Max shaft axial load: 500N
5. Backlash: 18 arcmin
6. Gear ratio from 3 to 216
7. Planetary gearbox size from 79 to 107mm
NEMA34 Precision type Planetary Gearbox for nema 34 Gear Stepper Electric motor 50N.m (6944oz-in) Rated Torque
This gear ratio is 5:1, if need other gear ratio, please contact us.
Input motor shaft ask for :
suitable with regular nema34 stepper electric motor shaft 14mm diameter*32 size(Including pad elevation). (plane and Circular shaft and essential shaft both available)
The difference between your economical and precision Nema34 planetary reducer:
To begin with: the economic and precise installation methods are different. The insight of the cost-effective retarder assembly may be the keyway (ie the output shaft of the engine is an assembleable keyway motor); the input of the precision reducer assembly can be clamped and the insight motor shaft is a flat or circular shaft or keyway. The shaft can be mounted (take note: the keyway shaft could be removed following the key is removed).
Second, the economical and precision planetary gearboxes possess the same drawings and measurements. The main difference is: the materials differs. Accurate gear units are more advanced than economical gear units in conditions of transmission efficiency and precision, along with heat and sound and torque output balance.