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An assembly of meshed gears comprising a central or sun equipment, a coaxial inner or ring gear, and one or more intermediate pinions supported upon a revolving carrier. Occasionally the term planetary gear teach can be used broadly as a synonym for epicyclic gear teach, or narrowly to point that the ring gear is the fixed member. In a simple planetary gear teach the pinions mesh simultaneously with the two coaxial gears (observe illustration). With the central equipment fixed, a pinion rotates about it as a world rotates about its sun, and the gears are named accordingly: the central gear may be 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 principal.
With the initial model of 18 sun teeth, 60 band teeth, and 3 planets, this led to a ‘single’ stage gear reduced amount of -82.33:1.
A normal planetary gearset of this size would 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
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 exterior 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 components of a planetary gear train could be split into four main constituents.
The housing with integrated internal teeth is known as a ring gear. In the majority of cases the housing is fixed. The traveling sun pinion is definitely 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 offer the mechanical link with the motor shaft. During operation, the planetary gears, which are mounted on a planetary carrier, roll between your sunlight pinion and the band equipment. The planetary carrier also represents the result shaft of the gearbox.
The sole reason for the planetary gears is to transfer the required torque. The amount of teeth has no effect on the tranny ratio of the gearbox. The number of planets may also vary. As the amount of planetary gears improves, the distribution of the strain increases and therefore the torque which can be transmitted. Increasing the amount of tooth engagements also decreases the rolling power. Since just part of the total result needs to be transmitted as rolling power, a planetary equipment is extremely efficient. The benefit of a planetary equipment compared to an individual spur gear lies in 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 constant size, different ratios could be realized by varying the amount of teeth of sunlight 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 usually 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 acquired by connecting many 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 could be overlaid by having a ring gear that is not set but is driven in any direction of rotation. Additionally it is possible to fix the drive shaft in order to grab the torque via the ring gear. Planetary gearboxes have become extremely important in many regions 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 transmitting ratios may also easily be performed with planetary gearboxes. Planetary Gear Transmission 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 many planetary gears
High efficiency due to low rolling power
Nearly unlimited transmission ratio options because of combination of several planet stages
Ideal as planetary switching gear due to fixing this or that section 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 operate 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 obtained their name.
The components of a planetary gear train could be split into four main constituents.
The housing with integrated internal teeth is known as a ring gear. In nearly all cases the housing is fixed. The generating sun pinion is usually 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 to be able to offer the mechanical connection to the engine shaft. During operation, the planetary gears, which are installed 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 amount of teeth does not have any effect on the transmission ratio of the gearbox. The number of planets can also vary. As the number of planetary gears raises, the distribution of the strain increases and therefore the torque that can be transmitted. Raising the number of tooth engagements also decreases the rolling power. Since only section of the total output has to be transmitted as rolling power, a planetary equipment is extremely efficient. The benefit of a planetary equipment compared to a single spur gear lies in this load distribution. Hence, it is possible to transmit high torques wit
h high efficiency with a compact style using planetary gears.
So long as the ring gear has a constant size, different ratios could be realized by various the number of teeth of sunlight gear and the amount of tooth of the planetary gears. Small 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 band gear. In this instance, we talk about multi-stage gearboxes.
With planetary gearboxes the speeds and torques could be overlaid by having a band gear that’s not fixed but is driven in virtually any direction of rotation. Additionally it is possible to repair 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 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 achieved with planetary gearboxes. Because of their positive properties and small design, the gearboxes have many potential uses in industrial applications.
The advantages of planetary gearboxes:
Coaxial arrangement of input shaft and output shaft
Load distribution to many planetary gears
High efficiency due to low rolling power
Almost unlimited transmission ratio options because of combination of several planet stages
Appropriate as planetary switching gear due to fixing this or that portion 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 an increase of compact and more reliable sun and planetary kind of gears arrangement as well as the manual clutch from manual power teach is definitely replaced with hydro coupled clutch or torque convertor which in turn made 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, Invert, Drive, Sport) modes 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 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 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 driving sun pinion is usually in the heart of the ring gear, and is coaxially organized in relation to the output. Sunlight pinion is usually mounted on a clamping system in order to provide the mechanical connection to the electric motor shaft. During procedure, the planetary gears, which are installed on a planetary carrier, roll between your sunlight pinion and the band gear. 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 does not have any effect on the transmitting 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 then the torque which can be transmitted. Raising the number of tooth engagements also decreases the rolling power. Since just portion of the total output needs to be transmitted as rolling power, a planetary equipment is incredibly efficient. The advantage 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 design using planetary gears.
So long as the ring gear has a continuous size, different ratios could be realized by various the number of teeth of sunlight gear and the number of the teeth of the planetary gears. The smaller the sun gear, the greater the ratio. Technically, a meaningful ratio range for a planetary stage is definitely 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 obtained by connecting a number of planetary levels in series in the same band gear. In this case, we speak of multi-stage gearboxes.
With planetary gearboxes the speeds and torques could be overlaid by having a ring gear that’s not fixed but is driven in any direction of rotation. Additionally it is possible to fix the drive shaft in order to pick up the torque via the ring equipment. Planetary gearboxes have grown to be extremely important in lots of areas of mechanical engineering.
They have grown to be particularly more developed 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 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 due to 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
Chance for 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 again to the motor. Having multiple teeth talk about the load also enables planetary gears to transmit high levels of torque. The mixture of compact size, large speed decrease and high torque tranny makes planetary gearboxes a popular choice for space-constrained applications.
But planetary gearboxes perform have some disadvantages. Their complexity in style and manufacturing tends to make them a more expensive option than various other gearbox types. And precision manufacturing is really important for these gearboxes. If one planetary gear is put closer to the sun gear compared to the others, imbalances in the planetary gears can occur, resulting in premature wear and failure. Also, the small footprint of planetary gears makes temperature dissipation more difficult, therefore applications that operate at very high speed or experience continuous operation may require cooling.
When using a “standard” (i.e. inline) planetary gearbox, the motor and the powered equipment must be inline with each other, although manufacturers provide right-angle designs that incorporate other gear sets (frequently bevel gears with helical 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 linked to ratio and max output 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 motor input SAE C or D hydraulic
A planetary transmission system (or Epicyclic system since it is also known), consists normally of a centrally pivoted sun gear, a ring equipment and several world gears which rotate between these.
This assembly concept explains the term planetary transmission, as the planet gears rotate around sunlight gear as in the astronomical sense the planets rotate around our sun.
The benefit of a planetary transmission 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 equipment assembly 2 of the Ever-Power 500/14 have two selectable sunlight gears. The first gear stage of the stepped planet gears engages with sun gear #1. The second equipment step engages with sun gear #2. With sunlight gear 1 or 2 2 coupled to the axle,or the coupling of sunlight equipment 1 with the band gear, three ratio variants are achievable with each gear assembly.
Direct Gear 1:1
Example Gear Assy (1) and (2)
With direct equipment selected in equipment assy (1) or (2), sunlight gear 1 is in conjunction with the ring gear in gear assy (1) or gear assy (2) respectively. The sun gear 1 and band gear then rotate jointly at the same rate. The stepped world gears usually 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 ring gear 3 are directly coupled.
Many “gears” are utilized for automobiles, but they are also used for many additional machines. The most frequent one is the “transmission” that conveys the energy of engine to tires. There are broadly two roles the transmission of an automobile plays : one is usually to decelerate the high rotation swiftness emitted by the engine to transmit to tires; the additional 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 traveling amounts to 1 1,000 – 4,000 rotations each and every minute (17 – 67 per second). Because it is not possible to rotate tires with the same rotation acceleration to run, it is necessary 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 swiftness of engine and that of tires is named the reduction ratio.
Then, exactly 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 do not require this kind of a sizable 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 change its output. Therefore, one adjusts its result by changing the reduction ratio employing 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 each other can be deemed as the ratio of the length of levers’ arms. That’s, if the decrease ratio is huge and the rotation swiftness as output is lower in comparison compared to that as input, the energy output by transmission (torque) will be huge; if the rotation rate as output isn’t so lower in comparison compared to that as insight, on the other hand, the energy output by transmission (torque) will be little. Thus, to improve the decrease ratio utilizing transmission is much comparable to the basic principle of moving things.
After that, how does a transmission alter the reduction ratio ? The answer is based on the system called a planetary gear 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 planet gears as observed in the graph below. It has a very complex framework rendering its style or production most challenging; it can realize the high decrease ratio through gears, however, it really is a mechanism suited to a reduction mechanism that requires both small size and powerful such as for example transmission for automobiles.
The planetary speed reducer & gearbox is some sort of transmission mechanism. It utilizes the velocity transducer of the gearbox to reduce the turnover quantity of the electric motor to the mandatory one and obtain a large torque. How really does a planetary gearbox work? We can find out more about it from the structure.
The main transmission structure of the planetary gearbox is planet gears, sun gear and band gear. The ring gear is located in close contact with the internal gearbox case. Sunlight equipment driven by the exterior power lies in the center of the ring equipment. Between your sun gear and band gear, there is a planetary gear set comprising three gears equally built-up at the earth carrier, which is definitely floating among them relying on the support of the result shaft, ring equipment and sun gear. When sunlight gear is usually actuated by the input power, the earth gears will be driven to rotate and revolve around the guts along with the orbit of the band equipment. The rotation of the planet gears drives the result shaft connected with the carrier to result the power.
Planetary speed reducer applications
Planetary speed reducers & gearboxes have a whole lot of advantages, like small size, light-weight, high load capability, long service life, high reliability, low noise, huge output torque, wide variety of speed ratio, high efficiency and so on. Besides, the planetary swiftness reducers gearboxes in Ever-Power are designed for sq . flange, which are easy and hassle-free for installation and suitable for AC/DC servo motors, stepper motors, hydraulic motors etc.
Due to 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, automobile, ships, weapons, aerospace and other commercial sectors.
The primary reason to use 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 strain would require that the electric motor torque, and therefore current, would have to be as many times higher as the reduction ratio which is used. Moog offers an array of windings in each frame size that, combined with an array of reduction ratios, offers an range of solution to output requirements. Each combination of engine and gearhead offers unique 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 suitable for transmitting high torques as high as 120 Nm. Generally, the larger gearheads come with ball bearings at the gearhead output.
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 within an extremely small package
– Concentric gearhead insight 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 less than 18 Arcmin. High torque, small size and competitive cost. The 16mm shaft diameter ensures stability in applications with belt tranny. Fast installation for your equipment.
80mm size inline planetary reducer for NEMA34 (flange 86mm) or NEMA42 stepper motor. Precision less than 18 Arcmin. High torque, small size and competitive price. The 16mm shaft diameter ensures balance in applications with belt transmission. Fast installation for your equipment.
1. Planetary ring gear material: metal steel
2. Bearing at output 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 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 ask for :
suitable with regular nema34 stepper electric motor shaft 14mm diameter*32 duration(Including pad elevation). (plane and Round shaft and crucial shaft both available)
The difference between your economical and precision Nema34 planetary reducer:
To begin with: the financial and precise installation methods are different. The input of the cost-effective retarder assembly may be the keyway (ie the output shaft of the engine can be an assembleable keyway motor); the insight of the precision reducer assembly is definitely clamped and the input engine shaft is a flat or circular shaft or keyway. The shaft could be mounted (note: the keyway shaft can be removed after the key is removed).
Second, the economical and precision planetary gearboxes possess the same drawings and dimensions. The main difference is: the materials is different. Accurate gear devices are superior to economical gear units when it comes to transmission efficiency and accuracy, in addition to heat and sound and torque output balance.