Many “gears” are used 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 can be to decelerate the high rotation velocity 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 overall state of generating amounts to 1 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 velocity 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 acceleration of engine and that of tires is named the reduction ratio.
Then, exactly why is it necessary to modify 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 big force to excersice once they have began to move. Automobile could be cited as a good example. An engine, however, by its character 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 amount of tooth of gears meshing with each other can be considered as the ratio of the length of levers’ arms. That is, if the reduction ratio is large and the rotation quickness as output is lower in comparison compared to that as input, the energy output by tranny (torque) will be huge; if the rotation speed as output is not so lower in comparison to that as insight, however, the power output by transmitting (torque) will be little. Thus, to change the decrease ratio utilizing transmitting is much akin to the theory of moving things.
After that, how does a transmission alter the reduction ratio ? The answer is based on the mechanism called a planetary equipment 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 has a very complex framework rendering its design or production most difficult; it can recognize the high reduction ratio through gears, nevertheless, it is a mechanism suited to a reduction system that requires both little size and high performance such as for example transmission for automobiles.
In a planetary gearbox, many teeth are engaged 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 reveal the load also enables planetary gears to transmit high degrees of torque. The mixture of compact size, large speed reduction and high torque tranny makes planetary gearboxes a popular choice for space-constrained applications.
But planetary gearboxes do involve some disadvantages. Their complexity in design and manufacturing tends to 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 than the others, imbalances in the planetary gears may appear, resulting in premature wear and failure. Also, the compact footprint of planetary gears makes temperature dissipation more difficult, so applications that run at high speed or encounter continuous operation may require cooling.
When using a “standard” (i.electronic. inline) planetary gearbox, the motor and the powered equipment must be inline with one another, although manufacturers provide right-angle designs that include other gear sets (frequently 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 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 (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 powerful, 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. Style features include installation any servo motors, regular 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 installation to rotary or indexing tables, pinion gears, pulleys or other drive elements with no need for a coupling. For high precision applications, backlash amounts down to 1 arc-minute are available. Right-angle and input shaft versions of these reducers are also available.
Standard 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 noise, making them the most accurate and efficient planetaries offered. Standard planetary design has three world gears, with an increased torque edition using four planets also available, please start to see the Reducers with Result Flange chart on the Unit Ratings tab beneath 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 greater concentricity and remove speed fluctuations. The housing can be installed with a ventilation module to increase input speeds and lower operational temperature ranges.
Result: Available in a solid shaft with optional keyway or an ISO 9409-1 flanged interface. We offer an array of standard pinions to attach directly 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 cycle forces rely on the powered load, the quickness vs. time 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’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 supplying a cost-effective gearbox, without sacrificing quality. These Planetary Gearboxes are available in sizes from 40mm to 180mm, perfect for motors ranging from NEMA 17 to NEMA 42 and bigger. 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 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 provides the best quality designed for the price point.
Features
Wide range 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
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 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 a single 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 sound creation. Because of this, spur gears are often used for lower swiftness applications, although they can be utilized at almost 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 the involutes fulfill. This aspect movements along the tooth areas as the gears rotate, and the kind of force ( referred to as the line of actions ) is tangent to both base circles. Therefore, the gears adhere to the essential regulation of gearing, which statements 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 for example nylon or polycarbonate. Gears produced from plastic produce less audio, but at the difficulty of power and loading capacity. Unlike other apparatus 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 attain 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 exterior 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 gear, 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 planetary gear reduction mainly used for planetary gear drives.
Spur gears are generally viewed as best for applications that want speed reduction and torque multiplication, such as for example ball mills and crushing gear. 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.