Many “gears” are utilized for Planetary Gear Reduction automobiles, but they are also utilized for many various other machines. The most typical one is the “transmitting” that conveys the power of engine to tires. There are broadly two functions the transmission of an automobile plays : one can be to decelerate the high rotation quickness emitted by the engine to transmit to tires; the additional is to change the reduction ratio in accordance with the acceleration / deceleration or driving speed of an automobile.
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 not possible to rotate tires with the same rotation swiftness to run, it is necessary to lower the rotation speed using the ratio of the amount of gear teeth. Such a role is called deceleration; the ratio of the rotation acceleration of engine and that of wheels is called the reduction ratio.
Then, why is it necessary to alter the reduction ratio relative to the acceleration / deceleration or driving speed ? The reason being substances need a large force to start moving however they do not require such a big force to keep moving once they have started to move. Automobile can be cited as an example. An engine, however, by its nature can’t so finely modify its output. Therefore, 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 each other can be deemed as the ratio of the space of levers’ arms. That is, if the reduction ratio is large and the rotation acceleration as output is low in comparison to that as input, the power output by tranny (torque) will be huge; if the rotation quickness as output isn’t so lower in comparison compared to that as insight, on the other hand, the energy output by transmission (torque) will be small. Thus, to change the decrease ratio utilizing tranny is much comparable to the theory of moving things.
After that, how does a transmitting alter the reduction ratio ? The answer lies in the mechanism called a planetary gear mechanism.
A planetary gear system is a gear system consisting of 4 components, namely, sun 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 understand the high decrease ratio through gears, nevertheless, it really is a mechanism suitable for a reduction mechanism 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 reduction to be performed with fairly small gears and lower inertia reflected back to the electric motor. Having multiple teeth discuss the load also allows planetary gears to transmit high degrees of torque. The mixture of compact size, large speed decrease and high torque tranny makes planetary gearboxes a popular choice for space-constrained applications.
But planetary gearboxes perform involve some disadvantages. Their complexity in style and manufacturing can make them a more expensive solution than additional gearbox types. And precision manufacturing is extremely important for these gearboxes. If one planetary equipment is positioned closer to sunlight gear than the others, imbalances in the planetary gears can occur, resulting in premature wear and failing. Also, the small footprint of planetary gears makes warmth dissipation more difficult, therefore 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 driven equipment must be inline with one another, although manufacturers offer right-angle designs that incorporate other gear sets (often bevel gears with helical tooth) 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 (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 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. These were specifically developed for make use of with state-of-the-art servo engine technology, providing limited integration of the engine to the unit. Design 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 decrease ratios from 3:1 to 600:1 and result torque capacities up to 16,227 lb.ft. The output can be provided with a good shaft or ISO 9409-1 flange, for mounting to rotary or indexing tables, pinion gears, pulleys or other drive elements with no need for a coupling. For high precision applications, backlash amounts down to 1 arc-minute can be found. Right-angle and insight shaft versions of these reducers are also available.
Regular applications for these reducers include precision rotary axis drives, traveling gantries & columns, materials handling axis drives and digital line shafting. Industries served 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 sound, making them the the majority of accurate and efficient planetaries offered. Standard planetary style has three world gears, with a higher torque edition using four planets also offered, please start to see the Reducers with Output Flange chart on the Unit Ratings tab beneath the “+” unit sizes.
Bearings: Optional result bearing configurations for software specific radial load, axial load and tilting moment reinforcement. Oversized tapered roller bearings are standard 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 improve input speeds and lower operational temperatures.
Result: Available in a solid shaft with optional keyway or an ISO 9409-1 flanged interface. We offer an array of standard pinions to attach directly to the output style of your choice.
Unit Selection
These reducers are typically selected based on the peak cycle forces, which usually happen during accelerations and decelerations. These routine forces rely on the powered load, the acceleration vs. period profile for the routine, and any other external forces acting on the axis.
For application & selection assistance, please call, fax or email us. Your application information will be examined by our engineers, who’ll recommend the very best solution for your application.
Ever-Power Automation’s Gearbox product lines offer high precision at affordable prices! The Planetary Gearbox product offering includes both In-Line and Right-Angle configurations, built with the design 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 bigger. The Spur Gearbox collection 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 are compatible with most Servo,
SureGear Planetary Gearboxes for Small Ever-Power Motors
The SureGear PGCN series is a great 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 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
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 tooth that are directly and oriented parallel to the shafts. They’re arguably the easiest and most common type of gear – easy to manufacture and ideal for a range of applications.
One’s teeth of a spur gear have got an involute profile and mesh one particular tooth simultaneously. The involute type means that spur gears just generate radial forces (no axial forces), however the approach to tooth meshing causes high pressure on the gear the teeth and high noise creation. For this reason, spur gears are usually utilized for lower swiftness applications, although they can be utilized at nearly every speed.
An involute products tooth includes 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 motions along the tooth areas as the gears rotate, and the type of force ( known as the line of actions ) is tangent to both foundation circles. Therefore, the gears stick 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 steel or brass, or from plastics such as nylon or polycarbonate. Gears produced from plastic produce much less audio, but at the trouble of power and loading capability. Unlike other gear types, spur gears don’t encounter high losses because of slippage, so they often times have high transmission overall performance. Multiple spur gears can be employed in series ( referred to as a equipment teach ) to achieve 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 external gears mesh with one another and rotate in opposing directions. Internal gears, in contrast, have tooth 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 equipment assemblies. Internal gears are mainly used for planetary equipment drives.
Spur gears are usually seen 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 use spur gears – despite their high noise amounts – include consumer home appliances such as washing machines and blenders. Even though noise limits the use of spur gears in passenger automobiles, they are often found in aircraft engines, trains, and even bicycles.