Many “gears” are utilized for automobiles, however they are also utilized for many various other machines. The most frequent one may be 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 swiftness emitted by the engine to transmit to tires; the various 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 general state of driving amounts to at least one 1,000 – 4,000 rotations each and every minute (17 – 67 per second). Since it is unattainable to rotate tires with the same rotation swiftness to run, it is necessary to lessen the rotation speed using 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 named the reduction ratio.
Then, why is it necessary to alter 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 this kind of 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. 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 the teeth of gears meshing with each other can be considered as the ratio of the distance of levers’ arms. That is, if the decrease ratio is huge and the rotation rate as output is lower in comparison to that as input, the power output by transmission (torque) will be huge; if the rotation swiftness as output isn’t so low in comparison compared to that as insight, on the other hand, the power output by transmission (torque) will be small. Thus, to change the decrease ratio utilizing tranny is much akin to the basic principle of moving things.
Then, how does a tranny alter the reduction ratio ? The answer lies in the mechanism called a planetary equipment mechanism.
A planetary gear system is a gear mechanism comprising 4 components, namely, sunlight 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 structure rendering its style or production most challenging; 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 for example transmission for automobiles.
In a planetary gearbox, many teeth are involved at once, which allows high speed decrease to be performed with relatively small gears and lower inertia reflected back again to the engine. Having multiple teeth reveal the load also allows planetary gears to transmit high degrees of torque. The mixture of compact size, huge speed reduction and high torque tranny makes planetary gearboxes a favorite choice for space-constrained applications.
But planetary gearboxes perform involve some disadvantages. Their complexity in design and manufacturing tends to make them a more expensive remedy than additional gearbox types. And precision production is extremely important for these gearboxes. If one planetary gear is put closer to the sun gear than the others, imbalances in the planetary gears can occur, leading to premature wear and failure. Also, the compact footprint of planetary gears makes high temperature dissipation more difficult, so applications that operate at high speed or experience continuous operation may require cooling.
When utilizing a “standard” (i.e. inline) planetary gearbox, the motor and the driven equipment should be inline with one another, although manufacturers offer right-angle designs that include 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 would depend on the drive configuration.
2 Max input speed related to ratio and max result speed
3 Max radial load placed at optimum load position
4 Weight varies with configuration and ratio selected
5 Requires tapered roller planet planetary gear reduction Bearings (unavailable 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. They were specifically developed for make use of with state-of-the-art servo engine technology, providing restricted integration of the engine to the unit. Style features include 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 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 right down to 1 arc-minute can be found. Right-angle and input shaft versions of these reducers are also offered.
Normal applications for these reducers include precision rotary axis drives, traveling gantries & columns, material 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 & ground gearing with minimal put on, low backlash and low sound, making them the many accurate and efficient planetaries obtainable. Standard planetary design has three world gears, with a higher torque edition 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 second reinforcement. Oversized tapered roller bearings are standard for the ISO Flanged Reducers.
Housing: Single piece metal housing with integral band gear provides higher concentricity and get rid of speed fluctuations. The housing can be fitted with a ventilation module to improve insight speeds and lower operational temperatures.
Result: Available in a solid shaft with optional keyway or an ISO 9409-1 flanged interface. You can expect an array of standard pinions to attach right to the output design of your choice.
Unit Selection
These reducers are usually selected based on the peak cycle forces, which often happen during accelerations and decelerations. These routine forces depend on the powered load, the speed vs. time profile for the cycle, and any other external forces functioning on the axis.
For application & selection assistance, please call, fax or email us. The application information will be reviewed by our engineers, who will 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-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, well suited for motors which range from NEMA 17 to NEMA 42 and bigger. The Spur Gearbox series provides an efficient, cost-effective option 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-pounds (167,808 oz-in), and so 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 offers 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 mounting to SureStep stepper motors
Optional shaft bushings designed 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 the teeth that are directly 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 the 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), nevertheless the method of tooth meshing causes ruthless 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 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 satisfy. This aspect movements along the tooth areas as the gears rotate, and the kind of force ( known as the line of actions ) can be tangent to both foundation circles. Hence, the gears adhere 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 be produced from metals such as steel or brass, or from plastics such as nylon or polycarbonate. Gears manufactured from plastic produce much less audio, but at the trouble of power and loading capacity. Unlike other equipment types, spur gears don’t encounter high losses because of slippage, so they often times have high transmission efficiency. Multiple spur gears can be utilized in series ( referred to as a gear teach ) to realize 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 exterior gears mesh with one another and rotate in opposite directions. Internal gears, on the other hand, have the teeth 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 direction. Because the shafts sit closer together, internal equipment assemblies are more compact 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 for example ball mills and crushing equipment. Examples of high- velocity applications that make use of spur gears – despite their high noise amounts – include consumer appliances such as washers and blenders. And while noise limits the utilization of spur gears in passenger automobiles, they are often found in aircraft engines, trains, and even bicycles.
