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An assembly of meshed gears consisting of a central or sun equipment, a coaxial inner or ring gear, and a number of intermediate pinions supported on a revolving carrier. Occasionally the word planetary gear train is utilized broadly as a synonym for epicyclic equipment train, or narrowly to point that the ring gear is the fixed member. In a simple planetary gear teach the pinions mesh at the same time with both coaxial gears (find illustration). With the central gear fixed, a pinion rotates about it as a world rotates about its sunlight, and the gears are called appropriately: the central gear may be the sun, and the pinions are the planets.
This is a concise, ‘single’ stage planetary gearset where the output is derived from a second ring gear varying a few teeth from the principal.
With the initial style 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 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 Man 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 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 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 traveling sun pinion is certainly in the heart of the ring gear, and is coaxially organized in relation to the output. Sunlight pinion is usually attached to a clamping system in order to provide the mechanical connection to the electric motor shaft. During procedure, the planetary gears, which are mounted 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 purpose of the planetary gears is to transfer the mandatory torque. The number 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 then the torque which can be transmitted. Raising 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 equipment 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 compact style using planetary gears.
So long as the ring gear has a constant size, different ratios could be realized by various the amount of teeth of sunlight gear and the number 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 sunlight gear are extremely small above and below these ratios. Higher ratios can be acquired by connecting many planetary levels in series in the same ring gear. In this case, we talk about 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 virtually any direction of rotation. Additionally it is possible to fix the drive shaft in order to pick up the torque via the band gear. 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 transmitting ratios may also easily be achieved with planetary gearboxes. Because of their positive properties and compact design, the gearboxes have many potential uses in industrial applications.
The benefits of planetary gearboxes:
Coaxial arrangement of input shaft and output shaft
Load distribution to many planetary gears
High efficiency because of low rolling power
Nearly unlimited transmission ratio options due to mixture of several planet stages
Suitable 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 variety 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 external 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 acquired their name.
The parts of a planetary gear train could be divided 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 driving sun pinion can be 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 motor shaft. During operation, 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 result 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 transmitting ratio of the gearbox. The amount of planets can also vary. As the number of planetary gears boosts, 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 only section of the total result has to be transmitted as rolling power, a planetary equipment is extremely efficient. The advantage of a planetary gear compared to an individual spur gear lies in this load distribution. It is therefore possible to transmit high torques wit
h high efficiency with a compact style using planetary gears.
Provided that the ring gear includes a constant size, different ratios can be realized by various the number of teeth of the sun gear and the amount of tooth of the planetary gears. The smaller the sun equipment, the higher the ratio. Technically, a meaningful ratio range for a planetary stage is usually 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 acquired by connecting several planetary levels in series in the same band gear. In this case, we talk about 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 virtually any direction of rotation. It is also possible to repair 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 become particularly more developed in areas where high output levels and fast speeds must be transmitted with favorable mass inertia ratio adaptation. High transmitting ratios can also easily be achieved with planetary gearboxes. Because of their 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 due to low rolling power
Almost unlimited transmission ratio options because of mixture of several planet stages
Ideal as planetary switching gear because of fixing this or that portion of the gearbox
Possibility of use as overriding gearbox
Favorable volume output
Suitability for a wide variety of applications
Epicyclic gearbox can be an automatic type gearbox in which parallel shafts and gears arrangement from manual gear box are replaced with an increase of compact and more dependable sun and planetary kind of gears arrangement as well as the manual clutch from manual power train 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 includes 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 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 gear takes place in analogy to the orbiting of the planets in the solar program. This is how planetary gears obtained their name.
The components of a planetary gear train could be divided into four main constituents.
The housing with integrated internal teeth is actually a ring gear. In nearly all cases the casing is fixed. The driving sun pinion can be in the center of the ring equipment, and is coaxially arranged in relation to the output. The sun pinion is usually attached to a clamping system to be able to offer the mechanical connection to the motor shaft. During operation, the planetary gears, which are installed on a planetary carrier, roll between your sun pinion and the ring equipment. The planetary carrier also represents the output shaft of the gearbox.
The sole purpose of the planetary gears is to transfer the 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 amount of planetary gears boosts, 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 portion 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 lies in this load distribution. Hence, it is feasible to transmit high torques wit
h high efficiency with a compact design using planetary gears.
So long as the ring gear includes a continuous size, different ratios could 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 higher the ratio. Technically, a meaningful ratio range for a planetary stage is approx. 3:1 to 10:1, because the planetary gears and sunlight gear are extremely little above and below these ratios. Higher ratios can be obtained by connecting several planetary phases in series in the same ring gear. In this instance, we talk about multi-stage gearboxes.
With planetary gearboxes the speeds and torques can be overlaid by having a band gear that’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 ring equipment. 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 transmission ratios can also easily be achieved with planetary gearboxes. Because of their 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 due to combination of several planet stages
Suitable as planetary switching gear because of fixing this or that part of the gearbox
Chance for use as overriding gearbox
Favorable volume output
In a planetary gearbox, many teeth are engaged at once, which allows high speed reduction to be achieved with relatively small gears and lower inertia reflected back to the engine. Having multiple teeth reveal the load also allows planetary gears to transmit high levels of torque. The combination of compact size, huge speed reduction and high torque transmitting makes planetary gearboxes a favorite choice for space-constrained applications.
But planetary gearboxes do involve some disadvantages. Their complexity in design and manufacturing can make them a far more expensive remedy than other gearbox types. And precision manufacturing is extremely important for these gearboxes. If one planetary gear is positioned closer to sunlight gear than the others, imbalances in the planetary gears may appear, resulting in premature wear and failing. Also, the small footprint of planetary gears makes heat dissipation more difficult, so applications that operate at high speed or encounter continuous operation may require cooling.
When using a “standard” (i.electronic. inline) planetary gearbox, the motor and the powered equipment must be inline with one another, although manufacturers offer right-angle designs that integrate other gear sets (frequently bevel gears with helical teeth) to provide an offset between your 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 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 electric motor input SAE C or D hydraulic
A planetary transmission system (or Epicyclic system as it is also known), consists normally of a centrally pivoted sun gear, a ring equipment and several planet gears which Planetary Gear Transmission rotate between these.
This assembly concept explains the word planetary transmission, as the planet gears rotate around the sun gear as in the astronomical sense the planets rotate around our sun.
The benefit of a planetary transmission is determined by load distribution over multiple planet gears. It is thereby feasible to transfer high torques utilizing a compact design.
Gear assembly 1 and gear assembly 2 of the Ever-Power 500/14 possess two selectable sunlight gears. The first gear stage of the stepped planet gears engages with sun gear #1. The next gear step engages with sunlight gear #2. With sunlight gear 1 or 2 2 coupled to the axle,or the coupling of sunlight gear 1 with the ring 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 gear assy (1) or (2), sunlight gear 1 is in conjunction with the ring gear in gear assy (1) or gear assy (2) respectively. Sunlight gear 1 and ring gear then rotate jointly at the same swiftness. The stepped planet gears do not unroll. Therefore the gear 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, however they are also utilized for many various other machines. The most typical one is the “transmission” that conveys the energy of engine to tires. There are broadly two functions the transmission of a car plays : one can be to decelerate the high rotation quickness emitted by the engine to transmit to tires; the additional is to change the reduction ratio relative to the acceleration / deceleration or driving speed of an automobile.
The rotation speed of an automobile’s engine in the general state of generating amounts to at least one 1,000 – 4,000 rotations each and every minute (17 – 67 per second). Because it is impossible to rotate tires with the same rotation rate 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 named deceleration; the ratio of the rotation speed of engine and that of wheels 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 ? The reason being substances need a large force to start moving however they usually do not require such a sizable force to keep moving once they have began to move. Automobile can be cited as an example. An engine, nevertheless, by its character can’t so finely change its output. For that reason, one adjusts its output 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 number of tooth of gears meshing with one another can be considered as the ratio of the length of levers’ arms. That is, if the reduction ratio is huge and the rotation swiftness as output is low in comparison to that as insight, the power output by tranny (torque) will be huge; if the rotation rate as output isn’t so lower in comparison compared to that as insight, however, the energy output by transmitting (torque) will be little. Thus, to change the decrease ratio utilizing transmitting is much akin to the basic principle of moving things.
After that, 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 consisting of 4 components, namely, sunlight gear A, several world gears B, internal gear C and carrier D that connects planet gears as observed in the graph below. It includes a very complex framework rendering its style or production most difficult; it can understand the high decrease ratio through gears, however, it really is a mechanism suited to a reduction system that requires both little size and high performance such as for example transmission for automobiles.
The planetary speed reducer & gearbox is some sort of transmission mechanism. It utilizes the swiftness transducer of the gearbox to reduce the turnover number of the engine to the required one and obtain a large torque. How will a planetary gearbox work? We are able to find out more about it from the structure.
The main transmission structure of the planetary gearbox is planet gears, sun gear and ring gear. The ring equipment is located in close get in touch with with the internal gearbox case. Sunlight gear driven by the external power lies in the guts of the ring equipment. Between your sun gear and ring gear, there is a planetary gear set consisting of three gears equally built-up at the earth carrier, which is certainly floating among them counting on the support of the result shaft, ring gear and sun equipment. When the sun gear is usually actuated by the input power, the earth gears will be driven to rotate and revolve around the center along with the orbit of the ring gear. The rotation of the planet gears drives the output shaft connected with the carrier to result the power.
Planetary speed reducer applications
Planetary speed reducers & gearboxes have a lot of advantages, like small size, light weight, high load capability, lengthy service life, high reliability, low noise, large output torque, wide selection of speed ratio, high efficiency and so forth. Besides, the planetary velocity reducers gearboxes in Ever-Power are made for square flange, which are easy and practical 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 transport, engineering machinery, metallurgy, mining, petrochemicals, construction machinery, light and textile market, medical equipment, instrument and gauge, vehicle, ships, weapons, aerospace and other industrial sectors.
The primary reason to employ a gearhead is that it creates it possible to regulate a sizable 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 need to be as much times greater as the reduction ratio which can be used. Moog offers an array of windings in each frame size that, coupled with a selection of reduction ratios, provides 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 of up to 120 Nm. As a rule, the larger gearheads include ball bearings at the gearhead output.
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 overall performance in the smallest of spaces
– High reduction ratio within an extremely small package
– Concentric gearhead input and output
Versions:
– Plastic version
– Ceramic version
– High-power gearheads
– Heavy-duty gearheads
– Gearheads with minimal backlash
80mm size inline planetary reducer for NEMA34 (flange 86mm) or NEMA42 stepper motor. Precision less than 18 Arcmin. High torque, compact size and competitive 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, compact size and competitive cost. 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 range 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 Electric 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 regular nema34 stepper motor shaft 14mm diameter*32 length(Including pad elevation). (plane and Round shaft and crucial shaft both available)
The difference between the economical and precision Nema34 planetary reducer:
To begin with: the financial and precise installation methods are different. The insight of the economical retarder assembly may be the keyway (ie the result shaft of the motor is an assembleable keyway engine); the input of the precision reducer assembly is certainly clamped and the input engine shaft is a flat or circular shaft or keyway. The shaft could be mounted (take note: the keyway shaft could be removed following the key is removed).
Second, the economical and precision planetary gearboxes have the same drawings and dimensions. The main difference is: the materials differs. Accurate gear systems are more advanced than economical gear units with regards to transmission efficiency and accuracy, and also heat and sound and torque output stability.