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June 26, 2020

Many “gears” are used for automobiles, but they are also utilized for many various other machines. The most frequent one may be the “transmitting” that conveys the power of engine to tires. There are broadly two functions the transmission of a car plays : one is usually to decelerate the high rotation acceleration emitted by the engine to transmit to tires; the additional is to improve the reduction ratio relative to the acceleration / deceleration or generating speed of a car.
The rotation speed of an automobile’s engine in the general state of traveling amounts to 1 1,000 – 4,000 rotations per minute (17 – 67 per second). Because it is unattainable to rotate tires with the same rotation velocity to perform, it is required to lower the rotation speed utilizing 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 called the reduction ratio.
Then, why is it necessary to alter the reduction ratio in accordance with the acceleration / deceleration or driving speed ? The reason being substances need a large force to begin moving however they do not require this kind of a sizable force to excersice once they have started to move. Automobile could be cited as a good example. An engine, nevertheless, by its nature can’t so finely change its output. Therefore, 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 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 huge; if the rotation speed as output isn’t so lower in comparison to that as input, however, the energy output by transmission (torque) will be little. Thus, to improve the decrease ratio utilizing transmission is much comparable to the theory of moving things.
Then, how does a transmission alter the reduction ratio ? The answer lies in the mechanism called a planetary equipment mechanism.
A planetary gear mechanism is a gear mechanism consisting of 4 components, namely, sun gear A, several world gears B, internal equipment C and carrier D that connects planet gears as seen in the graph below. It includes a very complex structure rendering its style or production most difficult; it can recognize the high reduction ratio through gears, however, it is a mechanism suitable for a reduction system that requires both small size and high performance such as for example transmission for automobiles.
In a planetary gearbox, many teeth are engaged at once, which allows high speed decrease to be performed with fairly small gears and lower inertia reflected back to the motor. Having multiple teeth reveal the load also enables planetary gears to transmit high degrees of torque. The combination of compact size, huge speed reduction and high torque transmitting makes planetary gearboxes a popular choice for space-constrained applications.
But planetary gearboxes do involve some disadvantages. Their complexity in style and manufacturing can make them a more expensive answer than other gearbox types. And precision manufacturing is extremely 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 compact footprint of planetary gears makes warmth dissipation more difficult, so applications that operate at very high speed or encounter 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 offer right-angle designs that integrate other gear sets (often 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 (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
Precision Planetary Reducers
This standard range of Precision Planetary Reducers are perfect for use in applications that demand powerful, precise positioning and repeatability. They were specifically developed for use with state-of-the-art servo motor technology, providing limited integration of the engine to the unit. Style features include mounting any servo motors, regular low backlash, high torsional stiffness, 95 to 97% efficiency and tranquil 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 can be provided with a good shaft or ISO 9409-1 flange, for installation to rotary or indexing tables, pinion gears, pulleys or other drive elements without the need for a coupling. For high precision applications, backlash levels right down to 1 arc-minute can be found. Right-angle and input shaft versions of the reducers are also available.
Typical applications for these reducers include precision rotary axis drives, traveling gantries & columns, materials handling axis drives and electronic line shafting. Industries offered include Material Managing, Automation, Aerospace, Machine Tool and Robotics.
Unit Design &
Construction
Gearing: Featuring case-hardened & floor gearing with minimal put on, low backlash and low noise, making them the most accurate and efficient planetaries obtainable. Standard planetary style has three planet gears, with a higher torque edition using four planets also obtainable, please start to see the Reducers with Output Flange chart on the machine Ratings tab under the “+” unit sizes.
Bearings: Optional output bearing configurations for app specific radial load, axial load and tilting instant reinforcement. Oversized tapered roller bearings are regular for the ISO Flanged Reducers.
Housing: Single piece steel housing with integral band gear provides better concentricity and remove speed fluctuations. The housing can be installed with a ventilation module to increase input speeds and lower operational temps.
Output: Available in a solid shaft with optional keyway or an ISO 9409-1 flanged interface. You can expect a wide range of standard pinions to attach directly to the output style of your choice.
Unit Selection
These reducers are usually selected based on the peak cycle forces, which often happen during accelerations and decelerations. These cycle forces rely on the powered load, the velocity vs. period profile for the cycle, and any other exterior forces functioning on the axis.
For application & selection assistance, please call, fax or email us. Your application info will be examined by our engineers, who will recommend the very best solution for your application.
Planetary Gear Reduction Ever-Power Automation’s Gearbox products offer high precision at affordable prices! The Planetary Gearbox product offering includes both In-Line and Right-Position configurations, built with the design goal of offering a cost-effective gearbox, without sacrificing quality. These Planetary Gearboxes are available in sizes from 40mm to 180mm, ideal for motors which range from NEMA 17 to NEMA 42 and bigger. 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 equipment ratios, with torque ratings up to 10,488 in-pounds (167,808 oz-in), and so are appropriate for most Servo,
SureGear Planetary Gearboxes for Little Ever-Power Motors
The SureGear PGCN series is a superb gearbox value for servo, stepper, and other movement control applications requiring a NEMA size input/output interface. It offers 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 designed 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 equipment, with shafts that are parallel and coplanar, and teeth that are straight 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 teeth of a spur gear have got an involute profile and mesh one particular tooth at the same time. The involute type means that spur gears just generate radial forces (no axial forces), nevertheless the approach to tooth meshing causes ruthless on the gear one’s teeth and high sound creation. For this reason, spur gears are often used for lower swiftness applications, although they could be utilized at nearly every speed.
An involute gear tooth includes a profile this is 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 fulfill. This aspect actions along the tooth areas as the gears rotate, and the kind of force ( referred to 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 metal or brass, or from plastics such as nylon or polycarbonate. Gears produced from plastic produce less sound, but at the difficulty of power and loading capability. Unlike other equipment types, spur gears don’t encounter high losses due to slippage, therefore they often times have high transmission overall performance. Multiple spur gears can be employed 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 area of the cylinder. Two exterior gears mesh with each other and rotate in reverse directions. Internal gears, in contrast, have teeth that are cut inside surface area of the cylinder. An external gear sits within the internal equipment, and the gears rotate in the same direction. Because the shafts sit closer together, internal gear assemblies are smaller sized than external gear assemblies. Internal gears are primarily used for planetary gear drives.
Spur gears are usually viewed as best for applications that require speed reduction and torque multiplication, such as for example ball mills and crushing gear. Examples of high- velocity applications that make use of spur gears – despite their high noise amounts – include consumer devices such as washing machines and blenders. And while noise limits the utilization of spur gears in passenger automobiles, they are generally found in aircraft engines, trains, and even bicycles.