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June 26, 2020

Many “gears” are utilized for automobiles, but they are also utilized for many other machines. The most typical one is the “transmission” that conveys the energy of engine to tires. There are broadly two roles the transmission of an automobile plays : one can be to decelerate the high rotation velocity emitted by the engine to transmit to tires; the additional is to improve the reduction ratio relative to the Planetary Gear Reduction acceleration / deceleration or generating speed of an automobile.
The rotation speed of an automobile’s engine in the general state of traveling amounts to at least one 1,000 – 4,000 rotations each and every minute (17 – 67 per second). Since it is unattainable to rotate tires with the same rotation rate to perform, 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 velocity of engine and that of tires is called the reduction ratio.
Then, why is it necessary to change the reduction ratio relative to the acceleration / deceleration or driving speed ? This is because substances require a large force to start moving however they usually do not require such a big force to keep moving once they have started to move. Automobile could be cited as a good example. An engine, nevertheless, by its character can’t so finely modify its output. Therefore, one adjusts its result by changing the reduction ratio utilizing a transmission.
The transmission of motive power through gears quite definitely resembles the principle of leverage (a lever). The ratio of the amount of tooth of gears meshing with each other can be deemed as the ratio of the distance of levers’ arms. That is, if the decrease ratio is large and the rotation velocity as output is lower in comparison to that as input, the power output by tranny (torque) will be large; if the rotation rate as output is not so lower in comparison compared to that as insight, on the other hand, the energy output by transmitting (torque) will be little. Thus, to change the reduction ratio utilizing tranny is much comparable to the basic principle of moving things.
Then, how does a transmission change the reduction ratio ? The answer is based on the mechanism called a planetary gear 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 world gears as observed in the graph below. It includes a very complex structure rendering its design or production most difficult; it can recognize the high reduction ratio through gears, however, it really 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 performed with fairly small gears and lower inertia reflected back to the engine. Having multiple teeth talk about the load also allows planetary gears to transmit high levels of torque. The mixture of compact size, large 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 design and manufacturing can make them a more expensive remedy than various other gearbox types. And precision manufacturing is really important for these gearboxes. If one planetary equipment is put closer to sunlight gear than 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, so applications that operate at very high speed or encounter continuous operation may require cooling.
When utilizing a “standard” (i.e. inline) planetary gearbox, the motor and the driven equipment must be inline with one another, although manufacturers offer right-angle designs that incorporate other gear sets (often bevel gears with helical 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 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 electric motor input SAE C or D hydraulic
Precision Planetary Reducers
This standard range of Precision Planetary Reducers are ideal for use in applications that demand powerful, precise positioning and repeatability. These were specifically developed for make use of with state-of-the-art servo electric motor technology, providing restricted integration of the motor to the unit. Style features include mounting any servo motors, standard low backlash, high torsional stiffness, 95 to 97% efficiency and noiseless running.
They can be purchased in nine sizes with reduction ratios from 3:1 to 600:1 and result torque capacities up to 16,227 lb.ft. The output could be provided with a solid shaft or ISO 9409-1 flange, for mounting to rotary or indexing tables, pinion gears, pulleys or other drive components without the need for a coupling. For high precision applications, backlash levels 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, materials handling axis drives and electronic line shafting. Industries offered include Material Handling, Automation, Aerospace, Machine Tool and Robotics.
Unit Design &
Construction
Gearing: Featuring case-hardened & surface gearing with minimal use, low backlash and low sound, making them the most accurate and efficient planetaries offered. Standard planetary design has three planet gears, with a higher torque version using four planets also available, please see the Reducers with Result Flange chart on the Unit Ratings tab under the “+” unit sizes.
Bearings: Optional output bearing configurations for software particular radial load, axial load and tilting minute reinforcement. Oversized tapered roller bearings are standard for the ISO Flanged Reducers.
Housing: Single piece steel housing with integral ring gear provides greater concentricity and get rid of speed fluctuations. The casing can be fitted with a ventilation module to increase insight speeds and lower operational temperature ranges.
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 mount directly to the output design 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 driven load, the quickness vs. period profile for the cycle, and any other external forces functioning on the axis.
For application & selection assistance, please call, fax or email us. Your application information will be examined by our engineers, who will recommend the best solution for your application.
Ever-Power Automation’s Gearbox product lines 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 can be found in sizes from 40mm to 180mm, ideal for motors which range from NEMA 17 to NEMA 42 and larger. The Spur Gearbox collection offers an efficient, cost-effective option appropriate for 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-lbs (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 motion control applications requiring a NEMA size input/output interface. It offers 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
Free of maintenance; 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
Additional 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 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 an array of applications.
One’s teeth of a spur gear have got an involute profile and mesh one tooth simultaneously. The involute type implies that spur gears simply generate radial forces (no axial forces), however the method of tooth meshing causes high pressure on the gear the teeth and high noise creation. For this reason, spur gears are often used for lower swiftness applications, although they could be utilized at almost every speed.
An involute products tooth includes a profile this is actually the involute of a circle, which implies that since two gears mesh, they get in touch with at a person point where the involutes fulfill. This aspect motions along the tooth areas as the gears rotate, and the type 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 throughout the mesh.
Spur gears could possibly be produced from metals such as for example metallic or brass, or from plastics such as for example nylon or polycarbonate. Gears produced from plastic produce much less audio, but at the trouble of power and loading capability. Unlike other apparatus types, spur gears don’t encounter high losses due to slippage, so they often have high transmission overall performance. Multiple spur gears can be employed in series ( referred to as a gear teach ) to attain large reduction ratios.
There are two primary types of spur gears: external and internal. Exterior gears have one’s teeth that are cut externally surface area of the cylinder. Two external gears mesh with one another and rotate in opposite directions. Internal gears, in contrast, have the teeth that are cut on the inside surface area of the cylinder. An exterior gear sits within the internal equipment, and the gears rotate in the same direction. Because the shafts are positioned closer together, internal gear assemblies are smaller sized than external gear assemblies. Internal gears are primarily used for planetary equipment 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 amounts – include consumer devices such as washing machines 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.