Many “gears” are utilized for automobiles, however they are also used for many additional machines. The most typical one may be the “transmitting” that conveys the energy of engine to tires. There are broadly two functions the transmission of an automobile plays : one is definitely 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 driving 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 each and every minute (17 – 67 per second). Because it is not possible to rotate tires with the same rotation rate to perform, it is necessary to lower the rotation speed using the ratio of the number of gear teeth. This kind of a role is called deceleration; the ratio of the rotation swiftness of engine and that of tires is named the reduction ratio.
Then, exactly why is it necessary to alter the reduction ratio in accordance with the acceleration / deceleration or driving speed ? The reason being substances need a large force to begin moving however they do not require such a large force to keep moving once they have began to move. Automobile can be cited as a good example. An engine, however, by its nature can’t so finely alter its output. As a result, 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 number of tooth of gears meshing with each other can be deemed as the ratio of the distance of levers’ arms. That’s, if the decrease ratio is huge and the rotation swiftness as output is lower in comparison compared to that as input, the energy output by transmitting (torque) will be large; if the rotation quickness as output isn’t so lower in comparison to that as insight, on the other hand, the power output by transmission (torque) will be little. Thus, to change the reduction ratio utilizing transmitting is much akin to the principle of moving things.
After that, how does a transmitting alter the reduction ratio ? The answer is based on the mechanism called a planetary gear mechanism.
A planetary gear system is a gear mechanism comprising 4 components, namely, sun gear A, several world gears B, internal equipment C and carrier D that connects planet gears as observed in the graph below. It includes a very complex framework rendering its design or production most difficult; it can understand the high reduction ratio through gears, however, it really is a mechanism suited to a reduction system that requires both small size and high performance such as transmission for automobiles.
In a planetary gearbox, many teeth are involved at once, that allows high speed reduction to be performed with relatively small gears and lower inertia reflected back again to the motor. Having multiple teeth discuss the load also enables planetary gears to transmit high degrees of torque. The mixture of compact size, large 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 tends to make them a far more expensive solution than various other gearbox types. And precision manufacturing 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 failure. Also, the compact footprint of planetary gears makes temperature dissipation more difficult, so applications that run at very high speed or encounter continuous operation may require cooling.
When using a “standard” (i.e. inline) planetary gearbox, the motor and the powered equipment must be inline with one another, although manufacturers provide right-angle designs that incorporate other gear sets (frequently bevel gears with helical teeth) to supply an offset between the 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 Planetary Gear Reduction 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 selection of Precision Planetary Reducers are perfect 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 motor technology, providing tight integration of the engine to the unit. Style features include installation any servo motors, standard low backlash, high torsional stiffness, 95 to 97% efficiency and silent 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 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 components with no need for a coupling. For high precision applications, backlash levels right down to 1 arc-minute can be found. Right-angle and insight shaft versions of the reducers are also available.
Common applications for these reducers include precision rotary axis drives, traveling gantries & columns, material handling axis drives and digital line shafting. Industries served include Material Handling, 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 design has three planet gears, with an increased torque version using four planets also obtainable, 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 particular radial load, axial load and tilting instant reinforcement. Oversized tapered roller bearings are standard for the ISO Flanged Reducers.
Housing: Single piece metal housing with integral ring gear provides greater concentricity and get rid of speed fluctuations. The housing can be installed with a ventilation module to increase input speeds and lower operational temperature ranges.
Output: Available in a good shaft with optional keyway or an ISO 9409-1 flanged interface. We offer an array of standard pinions to install directly to the output design of your choice.
Unit Selection
These reducers are typically selected predicated on the peak cycle forces, which often happen during accelerations and decelerations. These cycle forces depend on the powered load, the speed vs. period 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 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 contains both In-Line and Right-Position 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 larger. The Spur Gearbox collection provides 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 gear ratios, with torque rankings 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 great 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
Free of maintenance; 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
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 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 one particular tooth at the same time. The involute type means that spur gears just generate radial forces (no axial forces), nevertheless the approach to tooth meshing causes high pressure on the gear the teeth and high noise creation. Because of this, spur gears are usually used for lower swiftness applications, although they can be utilized at nearly every speed.
An involute devices tooth carries a profile this is the involute of a circle, which implies that since two gears mesh, they speak to at an individual point where in fact 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 claims that the ratio of the gears’ angular velocities must stay continuous through the entire mesh.
Spur gears could possibly be produced from metals such as for example steel or brass, or from plastics such as nylon or polycarbonate. Gears produced from plastic produce less audio, but at the trouble of power and loading capacity. Unlike other equipment types, spur gears don’t encounter high losses due to slippage, so they often have high transmission functionality. Multiple spur gears can be utilized in series ( known as a equipment 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 area of the cylinder. Two external gears mesh with one another and rotate in opposite directions. Internal gears, on the other hand, have teeth that are cut inside surface area of the cylinder. An external gear sits in the internal equipment, and the gears rotate in the same path. 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 generally viewed as best for applications that require speed reduction and torque multiplication, such as ball mills and crushing equipment. Types of high- velocity applications that use spur gears – despite their high noise amounts – include consumer home appliances such as washers and blenders. And while noise limits the use of spur gears in passenger automobiles, they are generally found in aircraft engines, trains, and even bicycles.