Many “gears” are utilized for automobiles, however they are also utilized for many other machines. The most typical one is the “transmission” that conveys the power of engine to tires. There are broadly two roles the transmission of a car plays : one can be to decelerate the high rotation swiftness emitted by the engine to transmit to tires; the additional is to change the reduction ratio in accordance with the acceleration / planetary gear reduction deceleration or driving speed of a car.
The rotation speed of an automobile’s engine in the overall state of traveling 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 swiftness to run, it is required to lower the rotation speed utilizing the ratio of the amount 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, why is it necessary to modify the reduction ratio relative to the acceleration / deceleration or driving speed ? It is because substances require a large force to begin moving however they usually do not require this kind of a large force to excersice once they have began to move. Automobile can be cited as an example. An engine, however, by its character can’t so finely alter its output. For that reason, one adjusts its result 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 teeth of gears meshing with one another can be considered as the ratio of the length of levers’ arms. That is, if the reduction ratio is huge and the rotation swiftness as output is lower in comparison compared to that as insight, the energy output by tranny (torque) will be huge; if the rotation speed as output isn’t so lower in comparison compared to that as insight, however, the energy output by transmission (torque) will be little. Thus, to change the reduction ratio utilizing transmitting is much comparable to the principle of moving things.
After that, how does a tranny alter the reduction ratio ? The answer lies in the system called a planetary equipment mechanism.
A planetary gear system is a gear system consisting of 4 components, namely, sun gear A, several planet gears B, internal gear C and carrier D that connects planet gears as observed in the graph below. It has a very complex framework rendering its design or production most challenging; it can recognize the high decrease ratio through gears, nevertheless, it really is a mechanism suited to a reduction mechanism 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 decrease to be achieved with relatively small gears and lower inertia reflected back to the electric motor. Having multiple teeth reveal the load also allows planetary gears to transmit high levels 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 have some disadvantages. Their complexity in design and manufacturing tends to make them a more expensive alternative than various other gearbox types. And precision production is extremely important for these gearboxes. If one planetary equipment is put closer to sunlight gear than the others, imbalances in the planetary gears can occur, resulting in premature wear and failure. Also, the small footprint of planetary gears makes temperature dissipation more difficult, so applications that run 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 must be inline with each other, although manufacturers provide right-angle designs that include other gear sets (often bevel 
gears with helical tooth) 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 result 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 range of Precision Planetary Reducers are ideal 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 motor technology, providing limited integration of the electric motor to the unit. Style features include installation any servo motors, regular low backlash, high torsional stiffness, 95 to 97% efficiency and silent running.
They can be purchased 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 components without the need for a coupling. For high precision applications, backlash amounts right down to 1 arc-minute can be found. Right-angle and insight shaft versions of these reducers are also obtainable.
Standard applications for these reducers include precision rotary axis drives, traveling gantries & columns, material handling axis drives and electronic line shafting. Industries served include Material Handling, Automation, Aerospace, Machine Tool and Robotics.
Unit Design &
Construction
Gearing: Featuring case-hardened & ground gearing with minimal use, low backlash and low sound, making them the many accurate and efficient planetaries available. Standard planetary design has three planet gears, with a higher torque edition using four planets also available, please start to see the Reducers with Result Flange chart on the Unit Ratings tab under the “+” unit sizes.
Bearings: Optional result bearing configurations for application specific radial load, axial load and tilting second reinforcement. Oversized tapered roller bearings are regular for the ISO Flanged Reducers.
Housing: Single piece steel housing with integral ring gear provides greater concentricity and remove speed fluctuations. The housing can be installed with a ventilation module to improve input speeds and lower operational temperatures.
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 mount directly to the output style of your choice.
Unit Selection
These reducers are usually selected predicated on the peak cycle forces, which usually happen during accelerations and decelerations. These cycle forces rely on the powered load, the swiftness vs. period profile for the cycle, and any other exterior forces functioning on the axis.
For application & selection assistance, please call, fax or email us. The application details will be reviewed by our engineers, who will recommend the very best solution for the application.
Ever-Power Automation’s Gearbox product lines offer high precision in affordable prices! The Planetary Gearbox item offering includes both In-Line and Right-Position configurations, built with the design goal of supplying a cost-effective gearbox, without sacrificing quality. These Planetary Gearboxes can be found 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 option compatible with Ever-Power Automation’s AC Induction Gear Motors. Ever-Power Automation’s Gearboxes are offered in up to 30 different equipment ratios, with torque rankings up to 10,488 in-pounds (167,808 oz-in), and so are compatible with most Servo,
SureGear Planetary Gearboxes for Small 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 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
Various 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 kind of gear – easy to manufacture and ideal for an array of applications.
One’s the teeth of a spur gear have got an involute profile and mesh 1 tooth simultaneously. The involute type implies that spur gears simply generate radial forces (no axial forces), nevertheless the method of tooth meshing causes ruthless on the gear the teeth and high sound creation. Because of this, spur gears are usually utilized for lower swiftness applications, although they can be utilized at almost every speed.
An involute devices tooth carries a profile this is actually the involute of a circle, which implies that since two gears mesh, they speak to at a person point where in fact the involutes meet. This aspect actions along the tooth areas as the gears rotate, and the kind of force ( referred to as the line of actions ) is usually 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 through the entire 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 audio, but at the difficulty of power and loading capability. 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 employed in series ( known as a equipment 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 of the cylinder. Two exterior gears mesh with one another and rotate in reverse directions. Internal gears, in contrast, have teeth that are cut on the inside surface of the cylinder. An external gear sits in the internal gear, and the gears rotate in the same path. Because the shafts are positioned closer together, internal equipment assemblies are smaller sized than external equipment assemblies. Internal gears are mainly used for planetary equipment drives.
Spur gears are generally seen as best for applications that require speed reduction and torque multiplication, such as ball mills and crushing equipment. Types of high- velocity applications that make use of spur gears – despite their high noise levels – include consumer appliances such as washing machines and blenders. Even though noise limits the use of spur gears in passenger automobiles, they are often used in aircraft engines, trains, and even bicycles.
