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June 26, 2020

Many “gears” are utilized for automobiles, however they are also used for many various other machines. The most frequent one is the “transmitting” that conveys the power of engine to tires. There are broadly two functions the transmission of an automobile plays : one is certainly to decelerate the high rotation acceleration emitted by the engine to transmit to tires; the additional is to change the reduction ratio relative to the acceleration / deceleration or generating speed of a car.
The rotation speed of an automobile’s engine in the overall state of driving amounts to 1 1,000 – 4,000 rotations per minute (17 – 67 per second). Since it is not possible to rotate tires with the same rotation quickness to run, it is necessary to lessen the rotation speed utilizing the ratio of the number of gear teeth. Such a role is called deceleration; the ratio of the rotation rate of engine and that of tires is named the reduction ratio.
Then, why is it necessary to alter the reduction ratio relative to the acceleration / deceleration or driving speed ? This is because substances need a large force to begin moving however they do not require such a huge force to excersice once they have started to move. Automobile could be cited as a good example. An engine, however, by its character can’t so finely alter its output. For that reason, one adjusts its output by changing the decrease ratio utilizing a transmission.
The transmission of motive power through gears quite definitely resembles the principle of leverage (a lever). The ratio of the number of the teeth of gears meshing with each other can be deemed as the ratio of the space of levers’ arms. That’s, if the reduction ratio is huge and the rotation acceleration as output is lower in comparison compared to that as insight, the energy output by transmission (torque) will be huge; if the rotation swiftness as output isn’t so lower in comparison to that as input, however, the energy output by tranny (torque) will be little. Thus, to change the reduction ratio utilizing transmitting is much comparable to the theory of moving things.
After that, how does a tranny modify the reduction ratio ? The answer lies in the mechanism called a planetary equipment mechanism.
A planetary gear system is a gear mechanism consisting of 4 components, namely, sunlight gear A, several planet gears B, internal equipment C and carrier D that connects planet gears as observed in the graph below. It has a very complex structure rendering its style or production most challenging; it can understand the high decrease ratio through gears, nevertheless, it is a mechanism suitable for a reduction system that requires both little size and powerful such as transmission for automobiles.
In a planetary gearbox, many teeth are engaged at once, that allows high speed reduction to be achieved with fairly small gears and lower inertia reflected back to the electric motor. Having multiple teeth share the load also enables planetary gears to transmit high degrees of torque. The mixture 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 tends to make them a more expensive answer than additional gearbox types. And precision production 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, leading to premature wear and failing. Also, the small footprint of planetary gears makes warmth dissipation more difficult, therefore applications that run at high speed or encounter continuous procedure may require cooling.
When utilizing 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 (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 would depend on the drive configuration.
2 Max input speed related 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 electric motor input SAE C or D hydraulic
Precision Planetary Reducers
This standard selection of Precision Planetary Reducers are perfect for use in applications that demand powerful, precise positioning and repeatability. These were specifically developed for use with state-of-the-art servo motor technology, providing restricted integration of the electric motor to the unit. Style features include mounting any servo motors, regular low backlash, high torsional stiffness, 95 to 97% efficiency and silent running.
They can be purchased 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 installation to rotary or indexing tables, pinion gears, pulleys or other drive elements with no need for a coupling. For high precision applications, Planetary Gear Reduction backlash amounts right down to 1 arc-minute are available. Right-angle and input shaft versions of these reducers are also offered.
Standard applications for these reducers include precision rotary axis drives, traveling gantries & columns, material 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 & surface gearing with minimal put on, low backlash and low noise, making them the the majority of accurate and efficient planetaries offered. Standard planetary style has three planet gears, with an increased torque edition using four planets also available, 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 specific 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 band gear provides higher concentricity and remove speed fluctuations. The casing can be fitted with a ventilation module to increase input speeds and lower operational temperatures.
Output: Available in a good shaft with optional keyway or an ISO 9409-1 flanged interface. You can expect an array of standard pinions to install directly to the output style of your choice.
Unit Selection
These reducers are usually selected based on the peak cycle forces, which usually happen during accelerations and decelerations. These routine forces rely on the driven load, the quickness 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 details will be reviewed by our engineers, who’ll recommend the very best solution for your application.
Ever-Power Automation’s Gearbox products offer high precision at affordable prices! The Planetary Gearbox product 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 can be found in sizes from 40mm to 180mm, perfect for motors ranging from NEMA 17 to NEMA 42 and bigger. The Spur Gearbox series offers 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 so are compatible with most Servo,
SureGear Planetary Gearboxes for Little Ever-Power Motors
The SureGear PGCN series is a good gearbox value for servo, stepper, and other movement control applications requiring a NEMA size input/output interface. It includes the best quality available 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 mounting to SureStep stepper motors
Optional shaft bushings designed 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 the teeth that are straight and oriented parallel to the shafts. They’re arguably the simplest and most common type of gear – easy to manufacture and suitable for an array of applications.
One’s the teeth of a spur gear have got an involute profile and mesh one particular tooth simultaneously. The involute type implies that spur gears just generate radial forces (no axial forces), nevertheless the approach to tooth meshing causes high pressure on the gear one’s teeth and high sound creation. For this reason, spur gears are often used for lower swiftness applications, although they can be utilized at almost every speed.
An involute devices tooth carries a profile this is the involute of a circle, which means that since two gears mesh, they get in touch with at a person point where in fact the involutes satisfy. This aspect movements along the tooth areas as the gears rotate, and the type of force ( referred to as the line of activities ) is usually tangent to both bottom circles. Therefore, the gears adhere to the essential regulation of gearing, which promises that the ratio of the gears’ angular velocities must stay continuous through the entire mesh.
Spur gears could be produced from metals such as steel 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 tools 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 ( known as a equipment teach ) to realize large reduction ratios.
There are two primary types of spur gears: external and internal. Exterior gears possess the teeth that are cut externally surface area of the cylinder. Two exterior gears mesh with one another and rotate in reverse directions. Internal gears, in contrast, have the teeth that are cut on the inside surface area of the cylinder. An external gear sits in the internal gear, and the gears rotate in the same direction. Because the shafts sit closer together, internal equipment assemblies are more compact than external equipment assemblies. Internal gears are mainly used for planetary gear drives.
Spur gears are usually viewed as best for applications that want speed decrease and torque multiplication, such as ball mills and crushing gear. Types of high- velocity applications that use spur gears – despite their high noise levels – include consumer devices such as washing machines and blenders. Even though noise limits the usage of spur gears in passenger automobiles, they are generally found in aircraft engines, trains, and even bicycles.