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Many “gears” are utilized for automobiles, Planetary Gear Reduction however they are also used for many other machines. The most frequent one may be the “transmission” that conveys the energy of engine to tires. There are broadly two roles the transmission of a car plays : one is usually to decelerate the high rotation acceleration emitted by the engine to transmit to tires; the various other is to improve the reduction ratio relative to the acceleration / deceleration or traveling speed of a car.
The rotation speed of an automobile’s engine in the overall state of driving amounts to at least one 1,000 – 4,000 rotations per minute (17 – 67 per second). Since it is impossible to rotate tires with the same rotation velocity to perform, it is required to lower the rotation speed utilizing the ratio of the number of gear teeth. This kind of a role is called deceleration; the ratio of the rotation quickness of engine and that of tires is named the reduction ratio.
Then, exactly why is it necessary to change the reduction ratio in accordance with the acceleration / deceleration or driving speed ? This is because substances require a large force to begin moving however they usually 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 alter its output. For that reason, one adjusts its result 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 teeth of gears meshing with one another can be considered as the ratio of the length 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 insight, the power output by transmitting (torque) will be large; if the rotation acceleration as output isn’t so low in comparison compared to that as insight, however, the power output by transmitting (torque) will be little. Thus, to improve the reduction ratio utilizing transmission is much akin to the basic principle of moving things.
Then, how does a tranny modify the reduction ratio ? The answer is based on the system called a planetary equipment mechanism.
A planetary gear mechanism is a gear mechanism comprising 4 components, namely, sunlight gear A, several world gears B, internal gear C and carrier D that connects world gears as observed in the graph below. It has a very complex framework rendering its style or production most difficult; it can recognize the high reduction ratio through gears, however, it is a mechanism suited to a reduction system that requires both little size and powerful such as transmission for automobiles.
In a planetary gearbox, many teeth are involved at once, that allows high speed reduction to be achieved with relatively small gears and lower inertia reflected back again to the engine. Having multiple teeth talk about the load also enables 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 style and manufacturing tends to make them a far more expensive option than other gearbox types. And precision production is really important for these gearboxes. If one planetary gear is put closer to the sun gear compared to the others, imbalances in the planetary gears may appear, leading to premature wear and failing. Also, the compact footprint of planetary gears makes heat dissipation more difficult, so applications that run at high speed or experience continuous procedure may require cooling.
When utilizing a “standard” (i.e. inline) planetary gearbox, the motor and the powered equipment should be inline with each other, although manufacturers provide right-angle designs that include other gear sets (frequently 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 related to ratio and max result 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 range of Precision Planetary Reducers are perfect for use in applications that demand high performance, precise positioning and repeatability. They were specifically developed for make use of with state-of-the-art servo electric motor technology, providing tight 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 peaceful running.
They are available 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 components without the 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 the reducers are also obtainable.
Common 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 & surface gearing with minimal use, low backlash and low noise, making them the many accurate and efficient planetaries obtainable. Standard planetary style has three planet gears, with an increased torque version using four planets also obtainable, please see the Reducers with Result Flange chart on the Unit Ratings tab beneath the “+” unit sizes.
Bearings: Optional output bearing configurations for program particular radial load, axial load and tilting second 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 casing can be fitted with a ventilation module to increase insight speeds and lower operational temperature ranges.
Result: Available in a good shaft with optional keyway or an ISO 9409-1 flanged interface. We offer 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 cycle forces depend on the powered load, the quickness vs. time 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 will recommend the very best solution for the application.
Ever-Power Automation’s Gearbox products offer high precision at affordable prices! The Planetary Gearbox item offering contains both In-Line and Right-Angle configurations, built with the look goal of supplying 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 larger. The Spur Gearbox series provides 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 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 an excellent gearbox value for servo, stepper, and other movement control applications requiring a NEMA size input/output interface. It provides the best quality available 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 mounting 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 equipment, with shafts that are parallel and coplanar, and teeth that are straight and oriented parallel to the shafts. They’re arguably the simplest and most common kind of gear – easy to manufacture and ideal for an array of applications.
One’s the teeth of a spur gear ‘ve got an involute profile and mesh 1 tooth at the same time. The involute type implies that spur gears simply generate radial forces (no axial forces), nevertheless the method of 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 devices tooth carries a profile this is actually 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 meet. This aspect actions along the tooth areas as the gears rotate, and the kind of force ( referred to as the line of activities ) can be tangent to both bottom circles. Hence, the gears adhere to the essential regulation of gearing, which statements 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 nylon or polycarbonate. Gears manufactured from plastic produce much 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, therefore they often have high transmission performance. Multiple spur gears can be utilized in series ( referred to as a gear teach ) to realize 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 of the cylinder. Two exterior gears mesh with each other and rotate in reverse directions. Internal gears, on the other hand, have the teeth that are cut inside surface of the cylinder. An exterior gear sits in the internal gear, and the gears rotate in the same path. 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 generally viewed as best for applications that want speed decrease and torque multiplication, such as ball mills and crushing equipment. Types of high- velocity applications that use spur gears – despite their high noise levels – include consumer appliances such as washers and blenders. And while noise limits the use of spur gears in passenger automobiles, they are generally used in aircraft engines, trains, and even bicycles.