Many “gears” are utilized for automobiles, however they are also utilized for many other machines. The most frequent one may be the “tranny” that conveys the power of engine to tires. There are broadly two functions the transmission of an automobile plays : one is definitely 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 generating amounts to at least one 1,000 – 4,000 rotations per minute (17 – 67 per second). Because it is not possible to rotate tires with the same rotation quickness to run, it is necessary to lower the rotation speed using the ratio of the amount of gear teeth. This kind of a role is called deceleration; the ratio of the rotation rate of engine and that of wheels is named the reduction ratio.
Then, exactly why is it necessary to change the reduction ratio relative to the acceleration / deceleration or driving speed ? The reason being substances need a large force to begin moving however they usually do not require such a sizable force to keep moving once they have started to move. Automobile can be cited as a good example. An engine, nevertheless, by its character can’t so finely alter its output. Consequently, 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 number of the teeth of gears meshing with each other can be considered as the ratio of the space of levers’ arms. That is, if the decrease ratio is large and the rotation rate as output is lower in comparison to that as input, the energy output by transmitting (torque) will be large; if the rotation quickness as output isn’t so low in comparison compared to that as insight, on the other hand, the energy output by transmission (torque) will be little. Thus, to improve the reduction ratio utilizing transmitting is much akin to the principle of moving things.
Then, how does a transmission alter the reduction ratio ? The answer lies in the system called a planetary gear mechanism.
A planetary gear mechanism is a gear system comprising 4 components, namely, sun gear A, several world gears B, internal gear C and carrier D that connects world gears as seen 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, nevertheless, it really is a mechanism suited to a reduction mechanism that requires both small size and high performance such as transmission for automobiles.
In a planetary gearbox, many teeth are involved at once, which allows high speed reduction to be performed with relatively small gears and lower inertia reflected back to the engine. Having multiple teeth discuss the load also allows planetary gears to transmit high levels of torque. The mixture of compact size, large speed decrease and high Planetary Gear Reduction torque tranny makes planetary gearboxes a popular choice for space-constrained applications.
But planetary gearboxes do involve some disadvantages. Their complexity in design and manufacturing tends to make them a far more expensive remedy than other gearbox types. And precision manufacturing is really important for these gearboxes. If one planetary equipment is positioned closer to sunlight 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 heat dissipation more difficult, therefore applications that run at very high speed or experience continuous procedure may require cooling.
When using a “standard” (i.electronic. inline) planetary gearbox, the motor and the driven equipment should be inline with one another, although manufacturers provide right-angle designs that integrate other gear sets (often bevel gears with helical tooth) 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 would depend on the drive configuration.
2 Max input speed related 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 engine input SAE C or D hydraulic
Precision Planetary Reducers
This standard selection of Precision Planetary Reducers are ideal for use in applications that demand high performance, precise positioning and repeatability. These were specifically 
developed for make use of with state-of-the-art servo engine technology, providing limited integration of the engine to the unit. Style features include mounting any servo motors, standard low backlash, high torsional stiffness, 95 to 97% efficiency and calm running.
They can be purchased in nine sizes with reduction ratios from 3:1 to 600:1 and output torque capacities up to 16,227 lb.ft. The output could be provided with a solid shaft or ISO 9409-1 flange, for installation to rotary or indexing tables, pinion gears, pulleys or other drive elements with no need for a coupling. For high precision applications, backlash levels right down to 1 arc-minute can be found. Right-angle and insight shaft versions of these reducers are also offered.
Normal applications for these reducers include precision rotary axis drives, traveling gantries & columns, material handling axis drives and digital line shafting. Industries offered include Material Managing, Automation, Aerospace, Machine Tool and Robotics.
Unit Design &
Construction
Gearing: Featuring case-hardened & floor gearing with minimal wear, low backlash and low noise, making them the many accurate and efficient planetaries offered. Standard planetary design has three world gears, with a higher torque edition using four planets also available, please start to see the Reducers with Result Flange chart on the machine Ratings tab beneath the “+” unit sizes.
Bearings: Optional output bearing configurations for program particular radial load, axial load and tilting moment reinforcement. Oversized tapered roller bearings are regular for the ISO Flanged Reducers.
Housing: Single piece steel housing with integral ring gear provides greater concentricity and eliminate speed fluctuations. The casing can be installed with a ventilation module to increase input speeds and lower operational temperatures.
Result: Available in a solid shaft with optional keyway or an ISO 9409-1 flanged interface. You can expect an array of standard pinions to install right to the output style of your choice.
Unit Selection
These reducers are typically selected based on the peak cycle forces, which often happen during accelerations and decelerations. These routine forces rely on the powered load, the quickness vs. period profile for the cycle, and any other exterior forces acting on the axis.
For application & selection assistance, please call, fax or email us. The application info will be examined by our engineers, who’ll recommend the very best solution for the application.
Ever-Power Automation’s Gearbox product lines offer high precision in affordable prices! The Planetary Gearbox product offering contains both In-Line and Right-Position configurations, built with the look goal of offering a cost-effective gearbox, without sacrificing quality. These Planetary Gearboxes can be found in sizes from 40mm to 180mm, well suited for motors which range from NEMA 17 to NEMA 42 and larger. The Spur Gearbox series provides an efficient, cost-effective choice compatible with Ever-Power Automation’s AC Induction Gear Motors. Ever-Power Automation’s Gearboxes can be found in up to 30 different gear ratios, with torque rankings up to 10,488 in-pounds (167,808 oz-in), and are appropriate for most Servo,
SureGear Planetary Gearboxes for Little Ever-Power Motors
The SureGear PGCN series is a good gearbox value for servo, stepper, and other motion control applications requiring a NEMA size input/output interface. It provides the best quality designed for the price point.
Features
Wide variety of ratios (5, 10, 25, 50, and 100:1)
Low backlash of 30 arc-min or less
20,000 hour service life
Maintenance free; requires no additional lubrication
NEMA sizes 17, 23, and 34
Includes hardware for installation to SureStep stepper motors
Optional shaft bushings available for mounting to other motors
1-year warranty
Applications
Material handling
Pick and place
Automation
Packaging
Various other motion control applications requiring a Ever-Power input/output
Spur gears are a type of cylindrical gear, with shafts that are parallel and coplanar, and tooth that are directly and oriented parallel to the shafts. They’re arguably the easiest and most common kind of gear – easy to manufacture and suitable for a range of applications.
One’s the teeth of a spur gear ‘ve got an involute profile and mesh one tooth simultaneously. The involute type means that spur gears just generate radial forces (no axial forces), nevertheless the method of tooth meshing causes high pressure on the gear one’s teeth and high noise creation. For this reason, spur gears are usually used for lower swiftness applications, although they could be utilized at almost every speed.
An involute apparatus tooth includes a profile this is actually the involute of a circle, which means that since two gears mesh, they get in touch with at an individual point where in fact the involutes satisfy. This aspect motions along the tooth areas as the gears rotate, and the kind of force ( known as the line of actions ) is certainly tangent to both base circles. Hence, the gears adhere to the fundamental regulation of gearing, which claims that the ratio of the gears’ angular velocities must stay continuous through the entire mesh.
Spur gears could possibly be produced from metals such as for example steel or brass, or from plastics such as nylon or polycarbonate. Gears manufactured from plastic produce much less audio, but at the trouble of power and loading capability. Unlike other equipment types, spur gears don’t encounter high losses due to slippage, therefore they often have high transmission functionality. Multiple spur gears can be utilized in series ( known as a gear teach ) to attain large reduction ratios.
There are two primary types of spur gears: external and internal. Exterior gears have got the teeth that are cut externally surface of the cylinder. Two external gears mesh with each other and rotate in reverse directions. Internal gears, on the other hand, have teeth that are cut inside surface of the cylinder. An exterior gear sits inside the internal equipment, and the gears rotate in the same path. Because the shafts sit closer together, internal gear assemblies are smaller sized than external equipment assemblies. Internal gears are mainly used for planetary equipment drives.
Spur gears are generally seen as best for applications that require speed reduction and torque multiplication, such as ball mills and crushing equipment. Examples of high- velocity applications that use spur gears – despite their high noise amounts – include consumer appliances such as washing machines and blenders. And while noise limits the use of spur gears in passenger automobiles, they are often used in aircraft engines, trains, and even bicycles.
