Many “gears” are used for automobiles, but they are also utilized for many other machines. The most typical one may be the “tranny” that conveys the energy of engine to tires. There are broadly two functions the transmission of a car plays : one is usually to decelerate the high rotation speed emitted by the engine to transmit to tires; the various other is to change 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 per minute (17 – 67 per second). Because it is impossible to rotate tires with the same rotation velocity to perform, it is required 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 called the reduction ratio.
Then, exactly why is it necessary to modify the reduction ratio relative to the acceleration / deceleration or driving speed ? It is because substances need a large force to begin moving however they usually do not require such a sizable force to keep moving once they have started to move. Automobile could be cited as an example. An engine, nevertheless, by its nature can’t so finely modify its output. Consequently, one adjusts its output by changing the reduction ratio employing a transmission.
The transmission of motive power through gears quite definitely resembles the principle of leverage (a lever). The ratio of the number of tooth 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 rate as output is lower in comparison compared to that as input, the energy output by tranny (torque) will be huge; if the rotation acceleration 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 improve the decrease ratio utilizing tranny is much comparable to the principle of moving things.
After that, how does a transmitting modify the reduction ratio ? The answer lies in the mechanism called a planetary gear mechanism.
A planetary gear mechanism is a gear system consisting of 4 components, namely, sunlight 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 framework rendering its style or production most challenging; 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 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 motor. Having multiple teeth share the load also enables planetary gears to transmit high degrees of torque. The combination of compact size, large speed decrease and high torque transmitting makes planetary gearboxes a favorite choice for space-constrained applications.
But planetary gearboxes do involve some disadvantages. Their complexity in style and manufacturing can make them a more expensive alternative than additional 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 failure. Also, the small footprint of planetary gears makes warmth dissipation more difficult, so applications that operate at very high speed or experience continuous operation 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 the 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 positioned 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 powerful, 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. Style features include Planetary Gear Reduction installation any servo motors, regular low backlash, high torsional stiffness, 95 to 97% efficiency and tranquil running.
They can be purchased in nine sizes with reduction 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.
Usual 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 & ground gearing with minimal wear, low backlash and low noise, making them the most accurate and efficient planetaries offered. Standard planetary style 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 beneath the “+” unit sizes.
Bearings: Optional result bearing configurations for application specific radial load, axial load and tilting moment 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 eliminate speed fluctuations. The casing can be fitted with a ventilation module to increase 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 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 depend on the driven load, the quickness 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. The application details will be reviewed by our engineers, who’ll recommend the very best solution for your application.
Ever-Power Automation’s Gearbox products offer high precision at 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 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 equipment ratios, with torque ratings up to 10,488 in-lbs (167,808 oz-in), and so are compatible with most Servo,
SureGear Planetary Gearboxes for Little Ever-Power Motors
The SureGear PGCN series is a superb 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
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
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 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 a single tooth simultaneously. The involute type means that spur gears just generate radial forces (no axial forces), nevertheless the method of tooth meshing causes high pressure on the gear one’s teeth and high noise creation. For this reason, spur gears are often utilized for lower swiftness applications, although they could be utilized at nearly every speed.
An involute tools tooth includes a profile this is the involute of a circle, which implies that since two gears mesh, they speak to at a person point where in fact the involutes fulfill. This aspect movements along the tooth areas as the gears rotate, and the kind of force ( known as the line of activities ) can be tangent to both bottom circles. Hence, 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 metallic 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, therefore they often times have high transmission efficiency. Multiple spur gears can be employed 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 possess the teeth that are cut externally surface area of the cylinder. Two external gears mesh with each other and rotate in opposing directions. Internal gears, in contrast, have the teeth that are cut on the inside surface area of the cylinder. An exterior gear sits in the internal equipment, and the gears rotate in the same path. Because the shafts sit closer together, internal equipment 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 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. And while noise limits the use of spur gears in passenger automobiles, they are generally found in aircraft engines, trains, and even bicycles.
