An assembly of meshed gears consisting of a central or sun gear, a coaxial internal or ring equipment, and one or more intermediate pinions supported upon a revolving carrier. Occasionally the term planetary gear teach is used broadly as a synonym for epicyclic gear teach, or narrowly to indicate that the ring equipment is the fixed member. In a simple planetary gear teach the pinions mesh concurrently with the two coaxial gears (discover illustration). With the central equipment set, a pinion rotates about any of it as a planet rotates about its sun, and the gears are named accordingly: the central gear may be the sunlight, and the pinions are the planets.
This is a compact, ‘single’ stage planetary gearset where in fact the output is derived from a second ring gear varying a few teeth from the primary.
With the initial model of 18 sun teeth, 60 band teeth, and 3 planets, this resulted in a ‘single’ stage gear reduced amount of -82.33:1.
A regular planetary gearset of the size could have a reduction ratio of 4.33:1.
That is a whole lot 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
Installation Screw Size M2 x 0.4mm
Product Weight 100g (3.53oz)
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 one way planetary gears obtained their name.
The parts 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 casing is fixed. The driving sun pinion is Planetary Gear Transmission definitely in the center of the ring equipment, 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 installed on a planetary carrier, roll between your sunlight pinion and the ring gear. 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 amount 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 load increases and then the torque that can be transmitted. Increasing the amount of tooth engagements also decreases the rolling power. Since only section of the total result 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 is based on this load distribution. Hence, it is possible to transmit high torques wit
h high efficiency with a concise style using planetary gears.
Provided that the ring gear includes a continuous size, different ratios could be realized by different the number of teeth of the sun gear and the amount of teeth of the planetary gears. The smaller the sun equipment, 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 a number of planetary phases in series in the same band gear. In cases like this, we speak of multi-stage gearboxes.
With planetary gearboxes the speeds and torques could be overlaid by having a ring gear that is not fixed but is driven in any direction of rotation. Additionally it is possible to repair the drive shaft in order to pick up the torque via the ring equipment. Planetary gearboxes have become extremely important in lots of 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 can also easily be performed with planetary gearboxes. Because of the 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 several planetary gears
High efficiency because of low rolling power
Almost unlimited transmission ratio options because of combination of several planet stages
Ideal as planetary switching gear because of fixing this or that portion of the gearbox
Chance for use as overriding gearbox
Favorable volume output
Suitability for a wide range of applications
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 system. This is one way planetary gears obtained their name.
The components 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 generating sun pinion is usually in the heart of the ring equipment, and is coaxially organized with regards to the output. Sunlight pinion is usually mounted on a clamping system in order to offer the mechanical link with the electric motor shaft. During operation, the planetary gears, which are mounted on a planetary carrier, roll between the sunlight pinion and the ring gear. 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 has no effect on the tranny 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 that can be transmitted. Raising the amount of tooth engagements also reduces the rolling power. Since just part of the total output has to be transmitted as rolling power, a planetary gear is incredibly efficient. The benefit of a planetary equipment compared to an individual spur gear is based on this load distribution. Hence, it is possible to transmit high torques wit
h high efficiency with a compact design using planetary gears.
Provided that the ring gear includes a continuous size, different ratios could be realized by different the number of teeth of the sun gear and the number of teeth of the planetary gears. The smaller the sun gear, the higher the ratio. Technically, a meaningful ratio range for a planetary stage is certainly 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 obtained 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 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 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 tranny ratios may also easily be achieved with planetary gearboxes. Because of their 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 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
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 reliable sun and planetary kind of gears arrangement and also the manual clutch from manual power teach is replaced with hydro coupled clutch or torque convertor which produced the transmission automatic.
The idea of epicyclic gear box is taken 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, Invert, Drive, Sport) settings 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 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 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 nearly all cases the housing is fixed. The generating sun pinion is definitely in the heart of the ring equipment, and is coaxially organized with regards 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 procedure, 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 required torque. The number of teeth does not have any effect on the tranny ratio of the gearbox. The amount of planets can also vary. As the amount of planetary gears raises, the distribution of the load increases and then the torque which can be transmitted. Increasing the number of tooth engagements also decreases the rolling power. Since just area of the total output needs to be transmitted as rolling power, a planetary gear is extremely efficient. The benefit of a planetary equipment compared to a single spur gear is based on this load distribution. Hence, it is possible to transmit high torques wit
h high efficiency with a concise style using planetary gears.
So long as the ring gear includes a constant size, different ratios can be realized by various the number of teeth of the sun gear and the amount of teeth 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 small above and below these ratios. Higher ratios can be acquired by connecting many 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 ring gear that’s not set but is driven in any direction of rotation. It is also possible to fix the drive shaft to be able to pick up the torque via the band gear. 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 should be transmitted with favorable mass inertia ratio adaptation. High transmitting ratios may also easily be performed 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 mixture of several planet stages
Ideal as planetary switching gear due to fixing this or that portion 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 decrease to be achieved with fairly small gears and lower inertia reflected back again to the motor. Having multiple teeth share the load also enables planetary gears to transmit high degrees of torque. The mixture of compact size, large speed decrease and high torque tranny makes planetary gearboxes a favorite choice for space-constrained applications.
But planetary gearboxes perform involve some disadvantages. Their complexity in style and manufacturing can make them a far more expensive solution than various other gearbox types. And precision production 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 can occur, leading to premature wear and failure. Also, the small footprint of planetary gears makes temperature dissipation more difficult, therefore applications that run at very high speed or encounter continuous procedure may require cooling.
When utilizing a “standard” (i.e. inline) planetary gearbox, the motor and the powered equipment should be inline with each other, 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 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 since it is also known), consists normally of a centrally pivoted sun gear, a ring gear and several planet gears which rotate between these.
This assembly concept explains the word planetary transmission, as the earth gears rotate around sunlight 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 is thereby possible 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 world gears engages with sunlight gear #1. The second equipment step engages with sunlight gear #2. With sun gear one or two 2 coupled to the axle,or the coupling of sun equipment 1 with the band gear, three ratio variations are achievable with each equipment assembly.
Direct Gear 1:1
Example Gear Assy (1) and (2)
With direct gear selected in gear assy (1) or (2), the sun gear 1 is coupled with the ring equipment in gear assy (1) or gear assy (2) respectively. The sun gear 1 and band gear then rotate collectively at the same rate. The stepped world gears do not unroll. Thus the apparatus 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, however they are also used for many additional 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 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 change the reduction ratio in accordance with the acceleration / deceleration or generating speed of an automobile.
The rotation speed of an automobile’s engine in the general state of traveling amounts to 1 1,000 – 4,000 rotations each and every minute (17 – 67 per second). Since it is unattainable to rotate tires with the same rotation speed to perform, it is required to lower the rotation speed utilizing the ratio of the amount of gear teeth. Such a role is called deceleration; the ratio of the rotation swiftness of engine and that of wheels is called the reduction ratio.
Then, exactly why is it necessary to change 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 do not require this kind of a big force to excersice once they have started to move. Automobile could be cited as a good example. An engine, nevertheless, by its nature can’t so finely alter its output. Consequently, one adjusts its result by changing the decrease ratio employing a transmission.
The transmission of motive power through gears quite definitely resembles the principle of leverage (a lever). The ratio of the amount of teeth of gears meshing with each other can be considered as the ratio of the distance of levers’ arms. That’s, if the decrease ratio is large and the rotation velocity as output is lower in comparison compared to that as insight, the energy output by transmission (torque) will be large; if the rotation speed as output isn’t so lower in comparison compared to that as input, however, the power output by tranny (torque) will be little. Thus, to improve the reduction ratio utilizing tranny is much comparable to the theory of moving things.
After that, how does a tranny alter the reduction ratio ? The answer lies in the mechanism called a planetary equipment mechanism.
A planetary gear system is a gear mechanism comprising 4 components, namely, sunlight gear A, several planet gears B, internal equipment C and carrier D that connects world gears as observed in the graph below. It includes a very complex structure rendering its design or production most challenging; it can realize the high reduction ratio through gears, nevertheless, it is a mechanism suitable for a reduction mechanism that requires both little size and powerful such as for example transmission for automobiles.
The planetary speed reducer & gearbox is some sort of transmission mechanism. It utilizes the rate transducer of the gearbox to lessen the turnover amount of the motor to the mandatory one and obtain a big torque. How does a planetary gearbox work? We can find out more about it from the framework.
The main transmission structure of the planetary gearbox is planet gears, sun gear and ring gear. The ring gear is positioned in close contact with the inner gearbox case. The sun equipment driven by the exterior power lies in the center of the ring equipment. Between the sun gear and band gear, there exists a planetary equipment set comprising three gears similarly built-up at the earth carrier, which is definitely floating among them counting on the support of the output shaft, ring equipment and sun gear. When sunlight equipment is certainly actuated by the insight power, the planet gears will be powered to rotate and then revolve around the center together with the orbit of the band gear. The rotation of the earth gears drives the result shaft connected with the carrier to output the power.
Planetary speed reducer applications
Planetary speed reducers & gearboxes have a whole lot of advantages, like little size, light-weight, high load capability, long service life, high reliability, low noise, huge output torque, wide variety of speed ratio, high efficiency and so forth. Besides, the planetary quickness reducers gearboxes in Ever-Power are created for sq . flange, which are easy and easy for installation and ideal for AC/DC servo motors, stepper motors, hydraulic motors etc.
Because of these advantages, planetary gearboxes can be applied to the lifting transportation, engineering machinery, metallurgy, mining, petrochemicals, structure machinery, light and textile industry, medical equipment, instrument and gauge, car, ships, weapons, aerospace and other commercial sectors.
The primary reason to use a gearhead is that it makes it possible to control a huge load inertia with a comparatively small motor inertia. Without the gearhead, acceleration or velocity control of the strain would require that the electric motor torque, and thus current, would have to be as much times better as the decrease ratio which is used. Moog offers an array of windings in each body size that, combined with an array of reduction ratios, provides an assortment of solution to result requirements. Each combination of 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 include 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 performance in the smallest of spaces
– High reduction ratio in 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 significantly less than 18 Arcmin. High torque, small size and competitive price. The 16mm shaft diameter ensures stability in applications with belt transmission. Fast mounting 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 equipment 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 standard nema34 stepper electric motor shaft 14mm diameter*32 duration(Including pad height). (plane and Circular shaft and key shaft both available)
The difference between the economical and precision Nema34 planetary reducer:
First of all: the economic and precise installation strategies are different. The input of the cost-effective retarder assembly may be the keyway (ie the output shaft of the electric motor is an assembleable keyway motor); the insight of the precision reducer assembly is definitely clamped and the insight motor shaft is a flat or circular shaft or keyway. The shaft could be mounted (notice: 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 devices are superior to economical gear units when it comes to transmission efficiency and precision, as well as heat and noise and torque output balance.