Many “gears” are used for automobiles, but they are also utilized for many additional machines. The most typical one is the “tranny” that conveys the energy of engine to tires. There are broadly two roles the transmission of a car plays : one is definitely to decelerate the high rotation speed emitted by the engine to transmit to tires; the various other is to improve the reduction ratio in accordance with the acceleration / deceleration or generating speed of a car.
The rotation speed of an automobile’s engine in the general state of generating amounts to at least one 1,000 – 4,000 rotations each and every minute (17 – 67 per second). Because it is difficult to rotate tires with the same rotation speed 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 rate of engine and that of wheels is named the reduction ratio.
Then, exactly why is it necessary to modify the reduction ratio relative to 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 started to move. Automobile could be cited as a good example. An engine, however, by its nature can’t so finely modify its output. Consequently, one adjusts its result 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 teeth of gears meshing with each other can be considered as the ratio of the distance of levers’ arms. That’s, if the decrease ratio is huge and the rotation acceleration as output is lower in comparison compared 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 to that as insight, on the other hand, the power output by transmitting (torque) will be little. Thus, to change the decrease ratio utilizing transmitting is much akin to the principle of moving things.
After that, how does a transmitting alter the reduction ratio ? The answer lies in the system called a planetary gear mechanism.
A planetary gear mechanism is a gear system comprising 4 components, namely, sunlight 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 decrease ratio through gears, however, it is a mechanism suited to a reduction mechanism that requires both little size and high performance such as transmission for automobiles.
In a planetary gearbox, many teeth are engaged at once, which allows high speed decrease to be performed with relatively 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 combination of compact size, large speed reduction and high torque transmission makes planetary gearboxes a popular choice for space-constrained applications.
But planetary gearboxes do involve some disadvantages. Their complexity in style and manufacturing can make them a far more expensive alternative than various other gearbox types. And precision manufacturing is extremely important for these gearboxes. If one planetary gear is positioned closer to sunlight gear compared to the others, imbalances in the planetary gears may appear, leading to premature wear and failure. Also, the compact footprint of planetary gears makes warmth dissipation more difficult, so applications that run at very high speed or experience continuous procedure may require cooling.
When using a “standard” (i.electronic. inline) planetary gearbox, the motor and the powered equipment must be inline with each other, although manufacturers provide right-angle designs that incorporate 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 is dependent 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 motor input SAE C or D hydraulic
Precision Planetary Reducers
This standard selection of Precision Planetary Reducers are perfect 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 tight integration of the engine to the unit. Design features include installation any servo motors, regular low backlash, high torsional stiffness, 95 to 97% efficiency and quiet 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 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 levels down to 1 arc-minute are available. Right-angle and input shaft versions of these reducers are also available.
Typical 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 wear, low backlash and low noise, making them the most accurate and efficient planetaries obtainable. Standard planetary design has three world gears, with an increased torque version using four planets also available, please start to see the Reducers with Output Flange chart on the Unit Ratings tab under 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 band gear provides better concentricity and get rid of speed fluctuations. The casing can be installed with a ventilation module to improve input speeds and lower operational temps.
Output: Available in a solid shaft with optional keyway or an ISO 9409-1 flanged interface. We offer a wide variety of standard pinions to attach right to the output design of your choice.
Unit Selection
These reducers are usually selected predicated on the peak cycle forces, which often happen during accelerations and decelerations. These cycle forces depend on the driven load, the swiftness vs. period profile for the cycle, and any other external forces acting on the axis.
For application & selection assistance, please call, fax or email us. The application details will be examined by our engineers, who’ll 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 are available in sizes from 40mm to 180mm, perfect for motors which range from NEMA 17 to NEMA 42 and larger. The Spur Gearbox line offers an efficient, cost-effective choice 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-lbs (167,808 oz-in), and so are appropriate for most Servo,
SureGear Planetary Gearboxes for Small Ever-Power Motors
The SureGear PGCN series is a planetary gear reduction superb gearbox value for servo, stepper, and other movement 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 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 gear, with shafts that are parallel and coplanar, and teeth that are directly and oriented parallel to the shafts. They’re arguably the simplest and most common kind of gear – easy to manufacture and suitable for a range of applications.
One’s tooth of a spur gear ‘ve got an involute profile and mesh 1 tooth simultaneously. 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. For this reason, spur gears are often used for lower swiftness applications, although they can be utilized at nearly every speed.
An involute tools tooth includes a profile this is actually the involute of a circle, which implies that since two gears mesh, they speak to at an individual point where in fact the involutes meet. This aspect movements along the tooth areas as the gears rotate, and the kind 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 throughout the mesh.
Spur gears could be produced from metals such as 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 devices types, spur gears don’t encounter high losses due to slippage, so they often times 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 the teeth that are cut externally surface of the cylinder. Two external gears mesh with each other and rotate in opposing directions. Internal gears, on the other hand, have the 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 equipment assemblies. Internal gears are primarily used for planetary gear drives.
Spur gears are generally seen as best for applications that want speed reduction and torque multiplication, such as ball mills and crushing gear. Examples of high- velocity applications that make use of spur gears – despite their high noise amounts – include consumer 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.