An assembly of meshed gears comprising a central or sun equipment, a coaxial inner or ring equipment, and a number of intermediate pinions supported on a revolving carrier. Occasionally the word planetary gear teach is used broadly as a synonym for epicyclic equipment teach, or narrowly to point that the ring gear is the set member. In a straightforward planetary gear teach the pinions mesh concurrently with the two coaxial gears (observe illustration). With the central gear fixed, a pinion rotates about it as a planet rotates about its sun, 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 the output is derived from another ring gear varying a few teeth from the primary.
With the initial style 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 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
Output Shaft Support Dual Ball Bearing
Electrical Connection Male Spade Terminal
Operating Temperature -10 ~ +60°C
Installation Screw Size M2 x 0.4mm
Product Weight 100g (3.53oz)
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 takes place in analogy to the orbiting of the planets in the solar system. This is how planetary gears acquired their name.
The elements of a planetary gear train can be divided into four main constituents.
The housing with integrated internal teeth is known as a ring gear. In nearly all cases the casing is fixed. The driving sun pinion is definitely in the heart of the ring equipment, and is coaxially organized with regards to the output. The sun pinion is usually mounted on a clamping system to be able to offer the mechanical link with the engine shaft. During operation, the planetary gears, which are installed on a planetary carrier, roll between your sunlight 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 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 that can be transmitted. Raising the amount of tooth engagements also decreases the rolling power. Since just part of the total output has to be transmitted as rolling power, a planetary equipment is incredibly efficient. The benefit of a planetary gear compared to an individual spur gear is based on this load distribution. Hence, it is feasible 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 could be realized by varying the amount of teeth of the sun gear and the amount of teeth of the planetary gears. Small the sun gear, the higher the ratio. Technically, a meaningful ratio range for a planetary stage 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 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 equipment. Planetary gearboxes have become extremely important in many areas of mechanical engineering.
They have grown to be particularly more Planetary Gear Transmission developed in areas where high output levels and fast speeds should be transmitted with favorable mass inertia ratio adaptation. High transmitting ratios may also easily be performed with planetary gearboxes. Because of the positive properties and small design, the gearboxes have many potential uses in commercial applications.
The 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 because of combination of several planet stages
Ideal as planetary switching gear due to fixing this or that section of the gearbox
Chance for 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 equipment takes place in analogy to the orbiting of the planets in the solar program. This is one way planetary gears obtained their name.
The parts of a planetary gear train can be divided into four main constituents.
The housing with integrated internal teeth is actually a ring gear. In the majority of cases the housing is fixed. The driving sun pinion is definitely in the heart 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 operation, the planetary gears, which are mounted on a planetary carrier, roll between your sunlight pinion and the band gear. 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 amount of teeth has no effect on the tranny ratio of the gearbox. The number of planets can also vary. As the amount of planetary gears improves, the distribution of the strain increases and therefore the torque that can be transmitted. Increasing the number 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 incredibly efficient. The advantage of a planetary gear compared to a single spur gear is based on this load distribution. It is therefore possible 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 varying the number of teeth of sunlight gear and the number of teeth of the planetary gears. Small 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 many planetary levels in series in the same ring gear. In this case, we speak of multi-stage gearboxes.
With planetary gearboxes the speeds and torques can be overlaid by having a ring gear that 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 band gear. Planetary gearboxes have grown to be extremely important in lots of regions 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 possess many potential uses in industrial applications.
The advantages 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 due to combination 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 an array of applications
Epicyclic gearbox is an automatic type gearbox in which parallel shafts and gears arrangement from manual equipment box are replaced with more compact and more dependable sun and planetary kind of gears arrangement and also the manual clutch from manual power train can be 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 the perfect 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.
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 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 program. This is how planetary gears acquired 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 casing is fixed. The generating sun pinion can be in the heart of the ring gear, and is coaxially organized with regards to the output. Sunlight pinion is usually mounted on a clamping system in order to provide the mechanical link with the electric motor shaft. During procedure, the planetary gears, which are installed 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 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 number of planetary gears raises, the distribution of the strain increases and then the torque which can be transmitted. Raising the number of tooth engagements also reduces the rolling power. Since only portion of the total result needs to be transmitted as rolling power, a planetary gear is incredibly efficient. The benefit of a planetary equipment compared to an individual spur gear is based on this load distribution. Hence, it is possible to transmit high torques wit
h high efficiency with a compact style using planetary gears.
So long as the ring gear has a continuous size, different ratios can be realized by various the number of teeth of sunlight gear and the number of tooth of the planetary gears. Small the sun equipment, the greater the ratio. Technically, a meaningful ratio range for a planetary stage can be approx. 3:1 to 10:1, since the planetary gears and sunlight gear are extremely small above and below these ratios. Higher ratios can be obtained by connecting several planetary stages 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 to be able to pick up the torque via the ring gear. Planetary gearboxes have grown to be extremely important in lots of regions 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 transmitting 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 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
Ideal 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, that allows high speed reduction to be performed with fairly 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 combination of compact size, large speed reduction and high torque tranny makes planetary gearboxes a favorite choice for space-constrained applications.
But planetary gearboxes do involve some disadvantages. Their complexity in style and manufacturing can make them a more expensive alternative than additional gearbox types. And precision manufacturing is extremely important for these gearboxes. If one planetary gear is positioned closer to sunlight gear compared to the others, imbalances in the planetary gears may appear, leading to premature wear and failure. Also, the small footprint of planetary gears makes heat 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 powered equipment must be inline with each other, although manufacturers offer right-angle designs that incorporate other gear sets (often bevel gears with helical the teeth) to supply 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 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 program (or Epicyclic system as it is also 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 planet 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 equipment 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 equipment step engages with sunlight gear #2. With sun gear 1 or 2 2 coupled to the axle,or the coupling of sun gear 1 with the ring 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. Sunlight gear 1 and ring gear then rotate collectively at the same swiftness. The stepped world gears do not unroll. Hence 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 utilized for automobiles, however they are also used for many additional machines. The most typical one is the “tranny” that conveys the power of engine to tires. There are broadly two roles the transmission of an automobile plays : one can be 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 traveling speed of an automobile.
The rotation speed of an automobile’s engine in the overall state of driving amounts to at least one 1,000 – 4,000 rotations each and every minute (17 – 67 per second). Since it is difficult to rotate tires with the same rotation swiftness to run, it is necessary to lessen the rotation speed using the ratio of the number of gear teeth. Such a role is called deceleration; the ratio of the rotation quickness 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 need a large force to start moving however they usually do not require such a big force to keep moving once they have began to move. Automobile could be cited as a good example. An engine, however, by its character can’t so finely alter its output. As a result, one adjusts its result 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 the teeth of gears meshing with each other can be deemed as the ratio of the distance of levers’ arms. That’s, if the decrease ratio is huge and the rotation quickness as output is low in comparison compared to that as insight, the energy 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 power output by tranny (torque) will be little. Thus, to improve the decrease ratio utilizing transmission is much akin to the principle of moving things.
After that, how does a tranny modify the reduction ratio ? The answer lies in the system called a planetary equipment mechanism.
A planetary gear system is a gear system comprising 4 components, namely, sunlight gear A, several planet gears B, internal gear C and carrier D that connects world gears as observed in the graph below. It has a very complex framework rendering its design or production most challenging; it can realize the high decrease ratio through gears, however, it really is a mechanism suitable for a reduction system that requires both small size and powerful such as transmission for automobiles.
The planetary speed reducer & gearbox is some sort of transmission mechanism. It utilizes the speed transducer of the gearbox to reduce the turnover number of the motor 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 positioned in close contact with the internal gearbox case. The sun equipment driven by the exterior power lies in the guts of the ring equipment. Between your 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 result shaft, ring equipment and sun gear. When sunlight gear is usually actuated by the insight power, the earth gears will be driven to rotate and revolve around the guts together with the orbit of the ring equipment. The rotation of the earth 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, long service life, high reliability, low noise, large output torque, wide variety of speed ratio, high efficiency and so forth. Besides, the planetary speed reducers gearboxes in Ever-Power are made for sq . flange, which are easy and easy for installation and suitable for AC/DC servo motors, stepper motors, hydraulic motors etc.
Due to 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, car, ships, weapons, aerospace and other commercial sectors.
The primary reason to employ a gearhead is that it makes it possible to control a huge load inertia with a comparatively small motor inertia. Without the gearhead, acceleration or velocity control of the load would require that the engine torque, and thus current, would need to be as many times greater as the decrease ratio which can be used. Moog offers an array of windings in each frame size that, combined with a selection of reduction ratios, offers an assortment of solution to result requirements. Each mixture of electric motor 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 ideal for transmitting high torques of up to 120 Nm. As a rule, the larger gearheads come with ball bearings at the gearhead result.
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 performance 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 less than 18 Arcmin. High torque, compact size and competitive price. The 16mm shaft diameter ensures stability in applications with belt tranny. 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, small size and competitive cost. The 16mm shaft diameter ensures stability in applications with belt tranny. 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 duration 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 contact us.
Input motor shaft request :
suitable with standard nema34 stepper motor shaft 14mm diameter*32 size(Including pad height). (plane and Circular shaft and key 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 insight of the economical retarder assembly may be the keyway (ie the result shaft of the electric motor is an assembleable keyway electric motor); the insight of the precision reducer assembly is certainly clamped and the input engine shaft is a set or circular shaft or keyway. The shaft could be mounted (notice: the keyway shaft can be removed after the key is removed).
Second, the economical and precision planetary gearboxes have the same drawings and sizes. The main difference is: the material is different. Accurate gear models are more advanced than economical gear units in terms of transmission efficiency and accuracy, and also heat and noise and torque output stability.