Many “gears” are used for automobiles, but they are also utilized for many various other machines. The most frequent one may be the “transmission” 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 swiftness emitted by the engine to transmit to tires; the other is to improve the reduction ratio relative to the acceleration / deceleration or driving speed of a car.
The rotation speed of an automobile’s engine in the overall state of generating amounts to 1 1,000 – 4,000 rotations per minute (17 – 67 per second). Because it is impossible to rotate tires with the same rotation velocity to perform, it is necessary to lessen the rotation speed utilizing the ratio of the amount of gear teeth. Such a role is named deceleration; the ratio of the rotation quickness of engine and that of wheels is called the reduction ratio.
Then, exactly why is it necessary to change the reduction ratio relative to the acceleration / deceleration or driving speed ? This is because substances need a large force to start 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. For that reason, one adjusts its output 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 one another can be considered as the ratio of the distance of levers’ arms. That’s, if the decrease ratio is huge and the rotation velocity as output is lower in comparison compared to that as input, the energy output by transmitting (torque) will be huge; if the rotation velocity as output isn’t so low in comparison to that as insight, however, the power output by transmitting (torque) will be little. Thus, to change the reduction ratio utilizing transmitting is much comparable to the basic principle of moving things.
After that, how does a transmission modify the reduction ratio ? The answer is based on the mechanism called a planetary equipment mechanism.
A planetary gear mechanism is a gear system comprising 4 components, namely, sun gear A, several world gears 
B, internal equipment C and carrier D that connects world gears as seen in the graph below. It has a very complex framework rendering its design or production most difficult; it can understand the high reduction ratio through gears, nevertheless, it is a mechanism suited to a reduction mechanism that requires both small size and powerful such as transmission for automobiles.
In a planetary gearbox, many teeth are involved at once, which allows high speed decrease to be achieved with relatively small gears and lower inertia reflected back again to the electric motor. Having multiple teeth reveal the load also allows planetary gears to transmit high levels of torque. The combination of compact size, large speed reduction and high torque transmitting makes planetary planetary gear reduction Gearboxes a favorite choice for space-constrained applications.
But planetary gearboxes perform involve some disadvantages. Their complexity in design and manufacturing can make them a more expensive solution than other gearbox types. And precision manufacturing is really important for these gearboxes. If one planetary gear is put closer to the sun gear than the others, imbalances in the planetary gears can occur, leading to premature wear and failure. Also, the compact footprint of planetary gears makes warmth 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 powered equipment must be inline with one another, although manufacturers offer right-angle designs that integrate other gear sets (frequently bevel gears with helical tooth) 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 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 (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
Precision Planetary Reducers
This standard selection of Precision Planetary Reducers are ideal for use in applications that demand powerful, precise positioning and repeatability. They were specifically developed for use with state-of-the-art servo electric motor technology, providing restricted integration of the electric motor to the unit. Design features include mounting any servo motors, regular low backlash, high torsional stiffness, 95 to 97% efficiency and tranquil running.
They are available in nine sizes with decrease ratios from 3:1 to 600:1 and output torque capacities up to 16,227 lb.ft. The output could be provided with a good shaft or ISO 9409-1 flange, for mounting to rotary or indexing tables, pinion gears, pulleys or other drive components with no need for a coupling. For high precision applications, backlash levels right down to 1 arc-minute are available. Right-angle and input shaft versions of these reducers are also offered.
Typical applications for these reducers include precision rotary axis drives, traveling gantries & columns, material handling axis drives and electronic line shafting. Industries served include Material Managing, Automation, Aerospace, Machine Tool and Robotics.
Unit Design &
Construction
Gearing: Featuring case-hardened & floor gearing with minimal use, low backlash and low noise, making them the most accurate and efficient planetaries offered. Standard planetary design has three planet gears, with an increased torque version using four planets also obtainable, please start to see the Reducers with Result Flange chart on the Unit Ratings tab beneath the “+” unit sizes.
Bearings: Optional output bearing configurations for application particular radial load, axial load and tilting moment reinforcement. Oversized tapered roller bearings are regular for the ISO Flanged Reducers.
Housing: Single piece metal housing with integral ring gear provides higher concentricity and eliminate speed fluctuations. The housing can be installed with a ventilation module to increase insight speeds and lower operational temps.
Result: Available in a good shaft with optional keyway or an ISO 9409-1 flanged interface. We offer a wide variety of standard pinions to mount right to the output design of your choice.
Unit Selection
These reducers are typically selected based on the peak cycle forces, which often happen during accelerations and decelerations. These cycle forces rely on the driven load, the rate vs. time profile for the routine, and any other exterior forces functioning on the axis.
For application & selection assistance, please call, fax or email us. The application information will be reviewed by our engineers, who will recommend the very best solution for the application.
Ever-Power Automation’s Gearbox products offer high precision in affordable prices! The Planetary Gearbox item offering includes both In-Line and Right-Angle configurations, built with the look goal of offering a cost-effective gearbox, without sacrificing quality. These Planetary Gearboxes are available in sizes from 40mm to 180mm, perfect for motors which range from NEMA 17 to NEMA 42 and bigger. The Spur Gearbox series provides an efficient, cost-effective option compatible with Ever-Power Automation’s AC Induction Gear Motors. Ever-Power Automation’s Gearboxes are offered 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 great gearbox value for servo, stepper, and other movement control applications requiring a NEMA size input/output interface. It includes the best quality designed for the price point.
Features
Wide range 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
Other motion control applications requiring a Ever-Power input/output
Spur gears certainly are a type of cylindrical gear, with shafts that are parallel and coplanar, and the teeth that are straight and oriented parallel to the shafts. They’re arguably the easiest and most common type of gear – simple to manufacture and ideal for a range of applications.
One’s teeth of a spur gear ‘ve got an involute profile and mesh one tooth simultaneously. The involute type implies that spur gears just generate radial forces (no axial forces), however the approach to tooth meshing causes ruthless on the gear one’s teeth and high noise creation. For this reason, spur gears are usually utilized for lower swiftness applications, although they could be utilized at nearly every speed.
An involute gear tooth carries a profile this is the involute of a circle, which implies that since two gears mesh, they speak to at an individual point where the involutes satisfy. This aspect actions along the tooth areas as the gears rotate, and the kind of force ( known as the line of activities ) can be tangent to both bottom circles. Hence, the gears adhere to the essential 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 metal or brass, or from plastics such as nylon or polycarbonate. Gears manufactured from plastic produce less audio, but at the difficulty of power and loading capacity. Unlike other apparatus types, spur gears don’t encounter high losses due to slippage, so they often have high transmission functionality. Multiple spur gears can be employed in series ( referred to as a equipment teach ) to attain large reduction ratios.
There are two primary types of spur gears: external and internal. Exterior gears possess one’s teeth that are cut externally surface area of the cylinder. Two exterior gears mesh with each other and rotate in reverse directions. Internal gears, on the other hand, have teeth that are cut inside surface area of the cylinder. An exterior gear sits inside the internal gear, and the gears rotate in the same path. Because the shafts are positioned closer together, internal gear assemblies are smaller sized than external gear assemblies. Internal gears are mainly used for planetary gear drives.
Spur gears are generally seen as best for applications that require speed decrease and torque multiplication, such as ball mills and crushing equipment. Examples of high- velocity applications that make use of spur gears – despite their high noise levels – include consumer home appliances such as washers and blenders. Even though noise limits the use of spur gears in passenger automobiles, they are often used in aircraft engines, trains, and even bicycles.
