An assembly of meshed gears comprising a central or sun equipment, a coaxial inner or ring equipment, and one or more intermediate pinions supported on a revolving carrier. Occasionally the word planetary gear teach is used broadly as a synonym for epicyclic gear teach, or narrowly to point that the ring gear is the set member. In a straightforward planetary gear train the pinions mesh at the same time 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 appropriately: the central gear is the sun, 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 resulted in a ‘single’ stage gear reduction of -82.33:1.
A normal planetary gearset of this size could have a decrease ratio of 4.33:1.
That is a good deal 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
Result 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)
Within 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 how 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 actually a ring gear. In nearly all cases the casing is fixed. The generating sun pinion can be in the heart of the ring equipment, and is coaxially organized in relation to the output. The sun pinion is usually mounted on a clamping system to be able to offer 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 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 amount 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 boosts, the distribution of the load increases and then the torque which can be transmitted. Raising the amount of tooth engagements also decreases the rolling power. Since just part 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 an individual 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 has a continuous size, different ratios can be realized by different the amount of teeth of the sun 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, because the planetary gears and sunlight gear are extremely little above and below these ratios. Higher ratios can be obtained by connecting many planetary stages in series in the same ring gear. In this case, we speak of multi-stage gearboxes.
With planetary gearboxes the speeds and torques could be overlaid by having a band 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 band gear. Planetary gearboxes have become 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 transmitting ratios can 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 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 combination 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 a wide selection 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 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 how planetary gears obtained their name.
The parts 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 generating sun pinion can be in the heart 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 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 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 amount of teeth has no effect on the transmitting ratio of the gearbox. The number of planets can also vary. As the amount of planetary gears boosts, the distribution of the load increases and therefore the torque that can be transmitted. Increasing the number of tooth engagements also reduces the rolling power. Since only portion of the total output needs to be transmitted as rolling power, a planetary equipment 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 concise design using planetary gears.
Provided that the ring gear has a continuous size, different ratios can be realized by varying the number of teeth of sunlight gear and the number of tooth 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, because the planetary gears and the sun 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 is not set but is driven in any direction of rotation. Additionally it is possible to repair the drive shaft to be able to grab the torque via the ring gear. 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 transmitting ratios can also easily be performed with planetary gearboxes. Because of the 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 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 because of 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 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 and also the manual clutch from manual power train is certainly replaced with hydro coupled clutch or torque convertor which in turn produced 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 comes with the P N R D S (Parking, Neutral, Reverse, Drive, Sport) settings 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 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 parts 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 generating sun pinion is certainly in the center of the ring gear, and is coaxially organized with regards 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 installed 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 amount 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 equipment is incredibly 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 compact style 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 the teeth of the planetary gears. Small the sun equipment, 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 small above and below these ratios. Higher ratios can be obtained by connecting several 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 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 repair the drive shaft in order to pick up the torque via the band gear. Planetary gearboxes have become extremely important in lots of 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 may also easily be achieved with planetary gearboxes. Because of the 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 many planetary gears
High efficiency due to low rolling power
Nearly unlimited transmission ratio options due to 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
In a planetary gearbox, many teeth are involved at once, which allows high speed reduction to be achieved with relatively small gears and lower inertia reflected back again to the engine. Having multiple teeth share the load also allows planetary gears to transmit high degrees of torque. The mixture of compact size, huge speed decrease and high torque transmitting makes planetary gearboxes a favorite choice for space-constrained applications.
But planetary gearboxes do have some disadvantages. Their complexity in style and manufacturing can make them a more expensive solution than additional gearbox types. And precision manufacturing is really important for these gearboxes. If one planetary equipment is put closer to sunlight gear compared to the others, imbalances in the planetary gears can occur, resulting in premature wear and failing. Also, the small footprint of planetary gears makes high temperature dissipation more difficult, therefore applications that run at high speed or experience continuous operation may require cooling.
When utilizing a “standard” (i.electronic. inline) planetary gearbox, the motor and the driven equipment must be inline with each other, although manufacturers offer right-angle designs that incorporate other gear sets (often bevel gears with helical teeth) to supply 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 linked 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 (not available 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 system (or Epicyclic system since it can be known), consists normally of a centrally pivoted sunlight gear, a ring gear and several planet gears which rotate between these.
This assembly concept explains the term planetary transmission, as the earth 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 possible to transfer high torques utilizing a compact design.
Gear assembly 1 and gear assembly 2 of the Ever-Power 500/14 possess two selectable sun gears. The first equipment stage of the stepped planet gears engages with sunlight gear #1. The second gear step engages with sun gear #2. With sunlight gear 1 or 2 2 coupled to the axle,or the coupling of sun gear 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 equipment assy (1) or (2), sunlight gear 1 is in conjunction with the ring equipment in gear assy (1) or gear assy (2) respectively. The sun gear 1 and ring gear then rotate jointly at the same acceleration. The stepped world gears do not unroll. Thus the apparatus ratio is 1:1.
Gear assy (3) aquires direct gear predicated on the same principle. Sun gear 3 and band gear 3 are straight coupled.
Many “gears” are used 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 certainly to decelerate the high rotation velocity emitted by the engine to transmit to tires; the 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). Since it is not possible to rotate tires with the same rotation quickness to run, it is required to lessen the rotation speed using the ratio of the number of gear teeth. This kind of a role is called deceleration; the ratio of the rotation speed of engine and that of wheels is named the reduction ratio.
Then, why is it necessary to modify the reduction ratio relative to the acceleration / deceleration or driving speed ? It is because substances need a large force to start moving however they usually do not require such a huge force to excersice once they have began to move. Automobile could be cited as an example. An engine, nevertheless, by its character can’t so finely alter its output. For that reason, one adjusts its output by changing the reduction 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 one another can be deemed as the ratio of the length of levers’ arms. That is, if the decrease ratio is huge and the rotation velocity as output is low in comparison to that as insight, the energy output by tranny (torque) will be huge; if the rotation swiftness as output is not so lower in comparison compared to that as input, however, the energy output by transmitting (torque) will be little. Thus, to improve the decrease ratio utilizing transmission is much comparable to the principle of moving things.
Then, how does a transmitting modify the reduction ratio ? The answer is based on the system 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 gear C and carrier D that connects world gears as seen in the graph below. It has a very complex framework rendering its design or production most challenging; it can understand the high decrease ratio through gears, nevertheless, it really is a mechanism suitable for a reduction system that requires both little size and powerful such as transmission for automobiles.
The planetary speed Planetary Gear Transmission reducer & gearbox is some sort of transmission mechanism. It utilizes the velocity transducer of the gearbox to reduce the turnover number of the engine to the mandatory one and get 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 equipment is located in close contact with the inner gearbox case. The sun gear driven by the exterior power lies in the guts of the ring equipment. Between the sun gear and band gear, there exists a planetary equipment set consisting of three gears similarly built-up at the earth carrier, which is certainly floating among them counting on the support of the output shaft, ring equipment and sun gear. When sunlight gear is actuated by the input power, the earth gears will be driven to rotate and then revolve around the guts along with the orbit of the ring gear. The rotation of the planet gears drives the result shaft linked 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, huge output torque, wide selection of speed ratio, high efficiency and so forth. Besides, the planetary velocity reducers gearboxes in Ever-Power are designed for sq . flange, which are easy and practical for installation and suitable for AC/DC servo motors, stepper motors, hydraulic motors etc.
Because of these advantages, planetary gearboxes can be applied to the lifting transport, engineering machinery, metallurgy, mining, petrochemicals, building machinery, light and textile market, medical equipment, device and gauge, vehicle, ships, weapons, aerospace and other commercial sectors.
The primary reason to use a gearhead is that it creates it possible to regulate 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 need to be as many times higher as the decrease ratio which can be used. Moog offers a selection of windings in each frame size that, combined with a selection of reduction ratios, offers an assortment of solution to output requirements. Each mixture of motor and gearhead offers exclusive advantages.
Precision Planetary Gearheads
gearheads
32 mm LOW PRICED 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. As a rule, the larger gearheads come with ball bearings at the gearhead output.
Properties of the Ever-Power planetary gearhead:
– For tranny of high torques up to 180 Nm
– Reduction ratios from 4:1 to 6285:1
– High functionality in the tiniest 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 reduced backlash
80mm size inline planetary reducer for NEMA34 (flange 86mm) or NEMA42 stepper motor. Precision significantly less than 18 Arcmin. High torque, compact size and competitive price. The 16mm shaft diameter ensures stability in applications with belt transmitting. 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 cost. The 16mm shaft diameter ensures stability in applications with belt transmitting. 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 length from 79 to 107mm
NEMA34 Precision type Planetary Gearbox for nema 34 Gear Stepper Motor 50N.m (6944oz-in) Rated Torque
This gear ratio is 5:1, if need other gear ratio, please e mail us.
Input motor shaft request :
suitable with standard nema34 stepper motor shaft 14mm diameter*32 size(Including pad height). (plane and Circular shaft and important shaft both available)
The difference between your economical and precision Nema34 planetary reducer:
To begin with: the financial and precise installation strategies are different. The input of the economical retarder assembly may be the keyway (ie the result shaft of the electric motor is an assembleable keyway motor); the insight of the precision reducer assembly can be clamped and the input electric motor shaft is a set or circular shaft or keyway. The shaft can be mounted (take note: the keyway shaft can be removed following the key is removed).
Second, the economical and precision planetary gearboxes possess the same drawings and sizes. The primary difference is: the material is different. Accurate gear models are more advanced than economical gear units in terms of transmission efficiency and accuracy, along with heat and sound and torque output balance.