Many “gears” are used for automobiles, but they are also utilized for many other machines. The most typical one is the “transmitting” that conveys the energy of engine to tires. There are broadly two functions the transmission of a car plays : one is to decelerate the high rotation rate emitted by the engine to transmit to tires; the other is to improve the reduction ratio relative to the acceleration / deceleration or generating speed of an automobile.
The rotation speed of an automobile’s engine in the overall state of generating amounts to at least one 1,000 – 4,000 rotations each and every minute (17 – 67 per second). Because it is unattainable to rotate tires with the same rotation velocity to run, it is required to lower the rotation speed utilizing the ratio of the amount of gear teeth. Such a role is named deceleration; the ratio of the rotation velocity of engine and that of wheels is called the reduction ratio.
Then, exactly why is it necessary to alter 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 large force to keep moving once they have started to move. Automobile could be cited as an example. An engine, however, by its nature can’t so finely change its output. As a result, 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 one another can be deemed as the ratio of the distance of levers’ arms. That’s, if the decrease ratio is huge and the rotation quickness as output is lower in comparison compared to that as insight, the power output by transmitting (torque) will be huge; if the rotation speed as output isn’t so lower in comparison compared to that as input, however, the power output by transmission (torque) will be little. Thus, to improve the reduction ratio utilizing transmitting is much comparable to the principle of moving things.
Then, how does a transmitting alter the reduction ratio ? The answer is based on the system called a planetary gear mechanism.
A planetary gear mechanism 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 seen in the graph below. It includes a very complex framework rendering its style or production most difficult; it can realize the high reduction ratio through gears, however, it is a mechanism suited to a reduction mechanism that requires both little size and powerful such as for example transmission for automobiles.
In a planetary gearbox, many teeth are engaged at once, which allows high speed decrease to be achieved with fairly small gears and lower inertia reflected back to the 
engine. Having multiple teeth share the load also allows planetary gears to transmit high degrees of torque. The mixture of compact size, huge speed reduction and high torque transmission makes planetary gearboxes a popular choice for space-constrained applications.
But planetary gearboxes do have some disadvantages. Their complexity in style and manufacturing can make them a far more expensive remedy than other gearbox types. And precision production is extremely important for these gearboxes. If one planetary gear is positioned 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 heat dissipation more difficult, so applications that run at very high speed or experience continuous procedure may require cooling.
When using 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 integrate other gear sets (often bevel gears with helical the 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 would depend on the drive configuration.
2 Max input speed related 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 engine input SAE C or D hydraulic
Precision Planetary Reducers
This standard range of Precision Planetary Reducers are ideal for use in applications that demand high performance, 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. Design features include planetary gear reduction installation any servo motors, regular low backlash, high torsional stiffness, 95 to 97% efficiency and tranquil running.
They are available in nine sizes with decrease 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 installation to rotary or indexing tables, pinion gears, pulleys or other drive components with no need for a coupling. For high precision applications, backlash amounts down to 1 arc-minute are available. Right-angle and input shaft versions of these reducers are also obtainable.
Common applications for these reducers include precision rotary axis drives, traveling gantries & columns, material 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 & ground gearing with minimal put on, low backlash and low noise, making them the the majority of accurate and efficient planetaries obtainable. Standard planetary style has three planet gears, with an increased torque edition using four planets also available, please see the Reducers with Result Flange chart on the Unit Ratings tab under the “+” unit sizes.
Bearings: Optional result bearing configurations for app specific radial load, axial load and tilting second reinforcement. Oversized tapered roller bearings are standard 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 fitted with a ventilation module to increase 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 install right to the output style of your choice.
Unit Selection
These reducers are usually selected predicated on the peak cycle forces, which often happen during accelerations and decelerations. These routine forces rely on the driven load, the acceleration vs. time profile for the routine, and any other exterior forces acting on the axis.
For application & selection assistance, please call, fax or email us. Your application details 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 in affordable prices! The Planetary Gearbox item offering contains both In-Line and Right-Position configurations, built with the look goal of supplying a cost-effective gearbox, without sacrificing quality. These Planetary Gearboxes are available in sizes from 40mm to 180mm, perfect for motors which range from NEMA 17 to NEMA 42 and larger. The Spur Gearbox collection offers an efficient, cost-effective choice appropriate for 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-lbs (167,808 oz-in), and are appropriate for most Servo,
SureGear Planetary Gearboxes for Little Ever-Power Motors
The SureGear PGCN series is a good gearbox value for servo, stepper, and other motion control applications requiring a NEMA size input/output interface. It includes 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 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 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 type of gear – simple to manufacture and suitable for a range of applications.
One’s teeth of a spur gear ‘ve got an involute profile and mesh one particular 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 utilized for lower swiftness applications, although they can be utilized at nearly every speed.
An involute gear tooth carries 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 activities ) is certainly 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 throughout the 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 much less sound, but at the difficulty of power and loading capacity. Unlike other gear types, spur gears don’t encounter high losses due to slippage, therefore they often have high transmission functionality. Multiple spur gears can be employed in series ( known as a gear teach ) to achieve large reduction ratios.
There are two primary types of spur gears: external and internal. Exterior gears have got one’s teeth that are cut externally surface of the cylinder. Two external gears mesh with each other and rotate in reverse directions. Internal gears, in contrast, have tooth that are cut on the inside surface area of the cylinder. An exterior gear sits inside the internal equipment, and the gears rotate in the same path. Because the shafts sit closer together, internal gear assemblies are more compact than external gear assemblies. Internal gears are primarily used for planetary gear drives.
Spur gears are generally seen as best for applications that want speed decrease 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 levels – include consumer devices such as washing machines and blenders. Even though noise limits the usage of spur gears in passenger automobiles, they are often found in aircraft engines, trains, and even bicycles.