An assembly of meshed gears comprising a central or sun gear, a coaxial inner or ring equipment, and one or more intermediate pinions supported upon a revolving carrier. Occasionally the word Planetary Gear Transmission planetary gear train can be used broadly as a synonym for epicyclic gear train, or narrowly to indicate that the ring equipment is the fixed member. In a simple planetary gear teach the pinions mesh simultaneously with the two coaxial gears (find illustration). With the central equipment set, a pinion rotates about any of it as a planet rotates about its sun, and the gears are called accordingly: the central gear may be the sun, and the pinions will be the planets.
This is a concise, ‘single’ stage planetary gearset where the output comes from another ring gear varying a few teeth from the principal.
With the initial model of 18 sun teeth, 60 ring teeth, and 3 planets, this led to a ‘single’ stage gear reduction of -82.33:1.
A regular planetary gearset of the size would have a decrease ratio of 4.33:1.
That is a whole lot of torque in a small 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
Installation 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 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 one way planetary gears obtained 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 housing is fixed. The generating sun pinion is certainly in the center of the ring equipment, and is coaxially arranged with regards to the output. The sun pinion is usually attached to a clamping system in order to provide the mechanical link with the motor shaft. During procedure, the planetary gears, which are mounted on a planetary carrier, roll between the sun pinion and the band gear. 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 number of teeth has no effect on the transmission ratio of the gearbox. The amount of planets can also vary. As the amount of planetary gears improves, the distribution of the load increases and then the torque that can be transmitted. Raising the number of tooth engagements also decreases the rolling power. Since only part of the total output has to be transmitted as rolling power, a planetary gear is incredibly efficient. The advantage of a planetary equipment compared to an individual spur gear is based on 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 includes a constant size, different ratios can be realized by different the amount of teeth of the sun gear and the amount of teeth of the planetary gears. Small the sun equipment, 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 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 case, we speak of multi-stage gearboxes.
With planetary gearboxes the speeds and torques can 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 pick up the torque via the ring equipment. Planetary gearboxes have become extremely important in many regions 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 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 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 due to mixture 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
Suitability for an array of applications
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 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 components of a planetary gear train can be divided 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 in the center of the ring gear, and is coaxially organized with regards to the output. Sunlight pinion is usually mounted on a clamping system to be able to provide the mechanical connection to the engine shaft. During operation, the planetary gears, which are mounted 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 mandatory torque. The number of teeth has no effect on the transmitting ratio of the gearbox. The amount of planets can also vary. As the amount of planetary gears improves, the distribution of the load increases and then the torque which can be transmitted. Raising the number of tooth engagements also reduces the rolling power. Since just part of the total output needs to be transmitted as rolling power, a planetary gear is incredibly efficient. The advantage of a planetary equipment 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 compact style using planetary gears.
Provided that the ring gear includes a constant size, different ratios can be realized by varying the number of teeth of sunlight gear and the amount of teeth of the planetary gears. The smaller the sun gear, the higher the ratio. Technically, a meaningful ratio range for a planetary stage can be 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 ring gear. In cases like this, 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 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 areas of mechanical engineering.
They have grown to be particularly well established 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 their positive properties and small design, the gearboxes have many potential uses in industrial 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
Nearly unlimited transmission ratio options due to combination of several planet stages
Appropriate as planetary switching gear due to fixing this or that area of the gearbox
Possibility of use as overriding gearbox
Favorable volume output
Suitability for an array of applications
Epicyclic gearbox can be an automatic type gearbox in which parallel shafts and gears set up from manual equipment box are replaced with an increase of compact and more reliable sun and planetary type of gears arrangement as well as the manual clutch from manual power train is definitely 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 based on the need of the drive.
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 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 how planetary gears acquired their name.
The components of a planetary gear train can be divided into four main constituents.
The housing with integrated internal teeth is actually a ring gear. In nearly all cases the housing is fixed. The traveling sun pinion is in the heart of the ring gear, and is coaxially arranged in relation to the output. The sun pinion is usually mounted on a clamping system in order to offer the mechanical connection to the engine shaft. During operation, the planetary gears, which are installed on a planetary carrier, roll between the sun pinion and the ring 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 transmitting ratio of the gearbox. The amount of planets can also vary. As the amount of planetary gears increases, the distribution of the strain increases and therefore the torque which can be transmitted. Increasing the number of tooth engagements also reduces the rolling power. Since only section of the total result has to be transmitted as rolling power, a planetary equipment is incredibly efficient. The benefit 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 concise design using planetary gears.
Provided that the ring gear includes 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 equipment, the higher the ratio. Technically, a meaningful ratio range for a planetary stage can be 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 acquired by connecting several planetary stages in series in the same ring 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. It is also 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 many 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 industrial applications.
The benefits of planetary gearboxes:
Coaxial arrangement of input shaft and output shaft
Load distribution to several 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
Chance for use as overriding gearbox
Favorable volume output
In a planetary gearbox, many teeth are involved at once, which allows high speed reduction to be performed with relatively small gears and lower inertia reflected back again to the motor. Having multiple teeth discuss the load also allows planetary gears to transmit high degrees of torque. The mixture of compact size, huge speed reduction and high torque transmission makes planetary gearboxes a popular choice for space-constrained applications.
But planetary gearboxes do involve some disadvantages. Their complexity in style and manufacturing can make them a far more expensive alternative than additional gearbox types. And precision manufacturing is really important for these gearboxes. If one planetary gear is positioned closer to the sun gear compared to the others, imbalances in the planetary gears may appear, resulting in premature wear and failing. Also, the compact footprint of planetary gears makes temperature dissipation more difficult, so applications that run at high speed or encounter continuous operation may require cooling.
When utilizing 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 include other gear sets (often bevel gears with helical the teeth) to provide an offset between the 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 would depend on the drive configuration.
2 Max input speed related to ratio and max result speed
3 Max radial load placed 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 motor input SAE C or D hydraulic
A planetary transmission program (or Epicyclic system since it can be known), consists normally of a centrally pivoted sun gear, a ring equipment and several planet gears which rotate between these.
This assembly concept explains the word planetary transmission, as the planet gears rotate around the sun gear as in the astronomical sense the planets rotate around our sun.
The advantage of a planetary transmission is determined by load distribution over multiple planet gears. It really is thereby feasible to transfer high torques utilizing a compact design.
Gear assembly 1 and gear assembly 2 of the Ever-Power 500/14 have two selectable sunlight gears. The first equipment step 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), the sun gear 1 is in conjunction with the ring equipment in gear assy (1) or gear assy (2) respectively. The sun gear 1 and band gear then rotate jointly at the same swiftness. The stepped planet gears usually do not unroll. Therefore the gear ratio is 1:1.
Gear assy (3) aquires direct gear based on the same principle. Sunlight gear 3 and ring gear 3 are directly coupled.
Many “gears” are utilized for automobiles, but they are also used for many various other machines. The most frequent one may be the “transmitting” that conveys the power of engine to tires. There are broadly two roles the transmission of a car plays : one is to decelerate the high rotation acceleration emitted by the engine to transmit to tires; the other is to improve the reduction ratio relative to the acceleration / deceleration or driving speed of a car.
The rotation speed of an automobile’s engine in the overall state of generating amounts to 1 1,000 – 4,000 rotations per minute (17 – 67 per second). Because it is difficult to rotate tires with the same rotation rate to perform, it is necessary to lessen the rotation speed utilizing the ratio of the number of gear teeth. Such a role is called deceleration; the ratio of the rotation swiftness of engine and that of tires is named the reduction ratio.
Then, why is it necessary to modify the reduction ratio in accordance with the acceleration / deceleration or driving speed ? It is because substances require a large force to begin moving however they usually do not require such a large force to keep moving once they have started to move. Automobile can be cited as an example. An engine, nevertheless, by its nature can’t so finely modify its output. Therefore, one adjusts its result by changing the reduction 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 tooth of gears meshing with each other can be considered as the ratio of the space of levers’ arms. That is, if the reduction ratio is huge and the rotation velocity as output is low in comparison to that as insight, the power output by transmission (torque) will be large; if the rotation swiftness as output is not so lower in comparison compared to that as input, however, the power output by transmitting (torque) will be small. Thus, to improve the reduction ratio utilizing transmission is much akin to the theory of moving things.
Then, how does a transmitting change the reduction ratio ? The answer is based on the system called a planetary equipment mechanism.
A planetary gear mechanism is a gear mechanism consisting of 4 components, namely, sunlight gear A, several world gears B, internal equipment C and carrier D that connects planet gears as seen in the graph below. It includes a very complex framework rendering its design or production most challenging; it can realize the high decrease ratio through gears, nevertheless, it is a mechanism suitable for a reduction system that requires both little size and powerful such as transmission for automobiles.
The planetary speed reducer & gearbox is a kind of transmission mechanism. It utilizes the velocity transducer of the gearbox to lessen the turnover number of the motor to the required one and get a large torque. How will a planetary gearbox work? We are able to learn 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 contact with the internal gearbox case. Sunlight equipment driven by the external power lies in the guts of the ring gear. Between the sun gear and band gear, there is a planetary gear set comprising three gears equally built-up at the earth carrier, which is usually floating among them relying on the support of the result shaft, ring gear and sun equipment. When the sun equipment can be actuated by the input power, the earth gears will be driven to rotate and revolve around the guts along with the orbit of the ring equipment. The rotation of the planet gears drives the result shaft connected with the carrier to output the power.
Planetary speed reducer applications
Planetary speed reducers & gearboxes have a lot of advantages, like little size, light-weight, high load capability, lengthy service life, high reliability, low noise, large output torque, wide range of speed ratio, high efficiency and so on. Besides, the planetary speed reducers gearboxes in Ever-Power are made for sq . flange, which are easy and practical 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 transport, engineering machinery, metallurgy, mining, petrochemicals, building machinery, light and textile industry, medical equipment, instrument and gauge, car, ships, weapons, aerospace and other commercial sectors.
The primary reason to employ a gearhead is that it creates it possible to regulate a large load inertia with a comparatively small motor inertia. Without the gearhead, acceleration or velocity control of the strain would require that the engine torque, and thus current, would need to be as much times greater as the decrease ratio which can be used. Moog offers a selection of windings in each body size that, coupled with an array of reduction ratios, offers an assortment of solution to result requirements. Each combination of motor and gearhead offers exclusive 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 of up to 120 Nm. Generally, the larger gearheads come with ball bearings at the gearhead result.
Properties of the Ever-Power planetary gearhead:
– For transmitting of high torques up to 180 Nm
– Reduction ratios from 4:1 to 6285:1
– High functionality in the smallest of spaces
– High reduction ratio within an extremely small package
– Concentric gearhead input 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, compact size and competitive price. The 16mm shaft diameter ensures stability in applications with belt transmitting. 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 price. The 16mm shaft diameter ensures balance in applications with belt transmitting. Fast mounting 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 Engine 50N.m (6944oz-in) Rated Torque
This gear ratio is 5:1, if need other gear ratio, please contact us.
Input motor shaft demand :
suitable with regular nema34 stepper electric motor shaft 14mm diameter*32 duration(Including pad elevation). (plane and Circular shaft and essential shaft both available)
The difference between your economical and precision Nema34 planetary reducer:
First of all: the financial and precise installation strategies are different. The input of the cost-effective retarder assembly may be the keyway (ie the result shaft of the motor can be an assembleable keyway engine); the input of the precision reducer assembly is clamped and the insight motor shaft is a flat or circular shaft or keyway. The shaft could be mounted (note: the keyway shaft can be removed following the key is removed).
Second, the economical and precision planetary gearboxes possess the same drawings and measurements. The primary difference is: the material is different. Accurate gear products are superior to economical gear units with regards to transmission efficiency and accuracy, along with heat and sound and torque output stability.
