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An assembly of meshed gears comprising a central or sun equipment, a coaxial internal or ring equipment, and a number of intermediate pinions supported on a revolving carrier. Occasionally the word Planetary Gear Transmission planetary gear teach is utilized broadly as a synonym for epicyclic gear teach, or narrowly to indicate that the ring gear is the set member. In a simple planetary gear teach the pinions mesh simultaneously with both coaxial gears (see illustration). With the central equipment set, a pinion rotates about any of it as a planet rotates about its sunlight, and the gears are named appropriately: the central gear is the sun, and the pinions are the planets.
This is a compact, ‘single’ stage planetary gearset where in fact the output comes 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 led to a ‘single’ stage gear reduction of -82.33:1.
A regular planetary gearset of the size would have a reduction 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 Man 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 operate 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 obtained their name.
The components of a planetary gear train could be split into four main constituents.
The housing with integrated internal teeth is actually a ring gear. In the majority of cases the casing is fixed. The traveling sun pinion is usually in the heart of the ring equipment, and is coaxially arranged 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 ring equipment. The planetary carrier also represents the output shaft of the gearbox.
The sole reason for the planetary gears is to transfer the mandatory torque. The number of teeth does not have any effect on the transmitting ratio of the gearbox. The amount of planets can also vary. As the number of planetary gears boosts, the distribution of the load increases and therefore the torque which can be transmitted. Increasing the amount of tooth engagements also decreases the rolling power. Since only section 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 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 constant size, different ratios can be realized by various the amount of teeth of sunlight gear and the amount of teeth of the planetary gears. Small the sun gear, the greater the ratio. Technically, a meaningful ratio range for a planetary stage is usually 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 acquired by connecting a number of planetary stages in series in the same ring gear. In this instance, we speak of multi-stage gearboxes.
With planetary gearboxes the speeds and torques can be overlaid by having a ring gear that’s not fixed but is driven in any direction of rotation. It is also possible to repair the drive shaft in order to grab the torque via the band gear. Planetary gearboxes have grown to be 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 must be transmitted with favorable mass inertia ratio adaptation. High transmission ratios can also easily be achieved with planetary gearboxes. Because of their positive properties and small design, the gearboxes have many potential uses in commercial applications.
The benefits of planetary gearboxes:
Coaxial arrangement of input shaft and output shaft
Load distribution to many planetary gears
High efficiency because of low rolling power
Almost unlimited transmission ratio options due to 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 an array 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 exterior teeth on a concentric orbit. The circulation of the spur gear occurs in analogy to the orbiting of the planets in the solar program. This is how planetary gears acquired their name.
The parts of a planetary gear train can be split into four main constituents.
The housing with integrated internal teeth is known as a ring gear. In the majority of cases the housing is fixed. The generating sun pinion is in the center of the ring gear, and is coaxially arranged with regards to the output. The sun pinion is usually mounted on a clamping system in order to provide the mechanical link with the engine shaft. During operation, the planetary gears, which are installed on a planetary carrier, roll between the sun pinion and the band equipment. The planetary carrier also represents the output shaft of the gearbox.
The sole reason for the planetary gears is to transfer the required torque. The number of teeth does not have any effect on the transmission ratio of the gearbox. The amount of planets may also vary. As the number of planetary gears boosts, the distribution of the load increases and therefore the torque which can be transmitted. Increasing the amount of tooth engagements also reduces the rolling power. Since just area of the total output needs to be transmitted as rolling power, a planetary gear is incredibly efficient. The benefit of a planetary gear compared to a single spur gear is based on this load distribution. It is therefore feasible 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 various the number of teeth of the sun gear and the number of tooth of the planetary gears. Small the sun equipment, the higher the ratio. Technically, a meaningful ratio range for a planetary stage is 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 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 grab the torque via the band 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 transmission ratios can also easily be performed with planetary gearboxes. Because of their positive properties and small design, the gearboxes have many potential uses in commercial applications.
The 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 due to mixture of several planet stages
Suitable as planetary switching gear because of fixing this or that part of the gearbox
Possibility of use as overriding gearbox
Favorable volume output
Suitability for a wide range of applications
Epicyclic gearbox is an automatic type gearbox where parallel shafts and gears set up from manual gear 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 train is usually replaced with hydro coupled clutch or torque convertor which made the transmission automatic.
The idea of epicyclic gear box is extracted from the solar system which is considered to an ideal arrangement of objects.
The epicyclic gearbox usually includes the P N R D S (Parking, Neutral, Invert, Drive, Sport) settings which is obtained by fixing of sun and planetary gears based on the require 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 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 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 the majority of cases the casing is fixed. The generating sun pinion is in the heart of the ring equipment, and is coaxially arranged in relation to the output. Sunlight pinion is usually mounted on a clamping system to be able to offer the mechanical connection to the engine shaft. During procedure, the planetary gears, which are mounted on a planetary carrier, roll between your sun pinion and the band equipment. The planetary carrier also represents the output shaft of the gearbox.
The sole reason for the planetary gears is to transfer the mandatory torque. The amount of teeth has no effect on the transmission ratio of the gearbox. The amount of planets can also vary. As the number of planetary gears boosts, the distribution of the load increases and then the torque which can be transmitted. Increasing the number of tooth engagements also reduces the rolling power. Since just part of the total result has to be transmitted as rolling power, a planetary equipment is extremely 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 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 sunlight 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 approx. 3:1 to 10:1, because the planetary gears and the sun gear are extremely small above and below these ratios. Higher ratios can be obtained by connecting a number of 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 ring gear that is not set but is driven in any direction of rotation. Additionally it is possible to repair the drive shaft in order to grab the torque via the ring equipment. Planetary gearboxes have grown to be extremely important in many 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 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 several 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 portion 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 decrease to be performed with relatively small gears and lower inertia reflected back to the engine. Having multiple teeth discuss the load also enables planetary gears to transmit high levels of torque. The combination of compact size, large speed decrease and high torque transmission makes planetary gearboxes a popular choice for space-constrained applications.
But planetary gearboxes do have some disadvantages. Their complexity in style and manufacturing tends to make them a far more expensive solution than other gearbox types. And precision production is extremely important for these gearboxes. If one planetary gear is put closer to the sun gear than the others, imbalances in the planetary gears may appear, resulting in premature wear and failure. Also, the small footprint of planetary gears makes warmth dissipation more difficult, so 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 must be inline with one another, although manufacturers offer right-angle designs that include other gear sets (often bevel gears with helical the 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 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 (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 engine input SAE C or D hydraulic
A planetary transmission program (or Epicyclic system as it can be 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 benefit of a planetary transmission is determined by load distribution over multiple planet gears. It is thereby possible to transfer high torques employing a compact design.
Gear assembly 1 and equipment assembly 2 of the Ever-Power 500/14 possess two selectable sunlight gears. The first equipment step of the stepped planet gears engages with sunlight gear #1. The second gear step engages with sun gear #2. With sunlight gear one or two 2 coupled to the axle,or the coupling of sunlight equipment 1 with the ring gear, three ratio variations are achievable with each gear 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 coupled with the ring equipment in gear assy (1) or gear assy (2) respectively. Sunlight gear 1 and ring gear then rotate jointly at the same acceleration. The stepped world gears do not unroll. Therefore the apparatus ratio is 1:1.
Gear assy (3) aquires direct gear based on the same principle. Sun gear 3 and band gear 3 are directly coupled.
Many “gears” are utilized for automobiles, but they are also utilized for many other machines. The most frequent one may be the “transmitting” that conveys the power of engine to tires. There are broadly two functions the transmission of an automobile plays : one is certainly to decelerate the high rotation speed emitted by the engine to transmit to tires; the other is to change the reduction ratio in accordance with the acceleration / deceleration or generating speed of a car.
The rotation speed of an automobile’s engine in the general state of driving amounts to 1 1,000 – 4,000 rotations each and every minute (17 – 67 per second). Because it is difficult to rotate tires with the same rotation velocity to perform, it is necessary to lower the rotation speed using the ratio of the number of gear teeth. This kind of a role is named deceleration; the ratio of the rotation quickness of engine and that of wheels is named the reduction ratio.
Then, exactly why is it necessary to alter the reduction ratio relative to the acceleration / deceleration or driving speed ? This is because substances require a large force to begin moving however they do not require this kind of a sizable force to excersice once they have started to move. Automobile could be cited as a good example. An engine, however, by its character can’t so finely alter its output. Therefore, 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 amount of the teeth of gears meshing with one another can be considered as the ratio of the length of levers’ arms. That is, if the decrease ratio is large and the rotation acceleration as output is low in comparison compared to that as insight, the power output by transmitting (torque) will be huge; if the rotation swiftness as output is not so low in comparison compared to that as input, on the other hand, the energy output by tranny (torque) will be little. Thus, to improve the reduction ratio utilizing tranny is much akin to the theory of moving things.
Then, how does a transmitting change the reduction ratio ? The answer is based on the mechanism called a planetary gear mechanism.
A planetary gear system is a gear system comprising 4 components, namely, sun gear A, several planet gears B, internal gear C and carrier D that connects planet gears as seen in the graph below. It includes a very complex framework rendering its style or production most challenging; it can realize the high decrease ratio through gears, however, it is a mechanism suited to a reduction mechanism that requires both little size and high performance such as for example transmission for automobiles.
The planetary speed reducer & gearbox is a kind of transmission mechanism. It utilizes the velocity transducer of the gearbox to reduce the turnover quantity of the motor to the required one and obtain a large torque. How does a planetary gearbox work? We can learn more about it from the framework.
The main transmission structure of the planetary gearbox is planet gears, sun gear and band gear. The ring equipment is located in close get in touch with with the internal gearbox case. Sunlight equipment driven by the external power lies in the center of the ring gear. Between the sun gear and ring gear, there is a planetary equipment set consisting of three gears similarly built-up at the earth carrier, which can be floating among them counting on the support of the output shaft, ring gear and sun equipment. When sunlight equipment is actuated by the input power, the earth gears will be powered to rotate and then revolve around the guts along with the orbit of the band equipment. The rotation of the planet gears drives the output shaft linked with the carrier to output 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, huge output torque, wide range of speed ratio, high efficiency and so on. Besides, the planetary rate reducers gearboxes in Ever-Power are created for sq . flange, which are easy and hassle-free for installation and ideal for AC/DC servo motors, stepper motors, hydraulic motors etc.
Because of these advantages, planetary gearboxes are applicable to the lifting transportation, engineering machinery, metallurgy, mining, petrochemicals, building machinery, light and textile market, medical equipment, device and gauge, car, ships, weapons, aerospace and other industrial sectors.
The primary reason to employ a gearhead is that it creates it possible to control a huge load inertia with a comparatively small motor inertia. Without the gearhead, acceleration or velocity control of the load would require that the motor torque, and therefore current, would have to be as much times higher as the reduction ratio which can be used. Moog offers a selection of windings in each frame size that, coupled with a selection of reduction ratios, provides an assortment of solution to result requirements. Each mixture 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 as high as 120 Nm. As a rule, 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 functionality 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 cost. 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 significantly less than 18 Arcmin. High torque, small size and competitive cost. 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 e mail us.
Input motor shaft demand :
suitable with regular nema34 stepper electric motor shaft 14mm diameter*32 length(Including pad height). (plane and Round shaft and key shaft both available)
The difference between your economical and precision Nema34 planetary reducer:
To begin with: the economic and precise installation strategies are different. The insight of the economical retarder assembly may be the keyway (ie the result shaft of the electric motor is an assembleable keyway engine); the insight of the precision reducer assembly is clamped and the input electric motor shaft is a flat or circular shaft or keyway. The shaft could be mounted (note: the keyway shaft could be removed after the key is removed).
Second, the economical and precision planetary gearboxes possess the same drawings and measurements. The primary difference is: the material differs. Accurate gear units are more advanced than economical gear units in terms of transmission efficiency and accuracy, as well as heat and noise and torque output balance.