Many “gears” are used for automobiles, however they are also used for many other machines. The most typical one is the “tranny” 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 acceleration emitted by the engine to transmit to tires; the various other is to change the reduction ratio in accordance with the acceleration / deceleration or generating speed of an automobile.
The rotation speed of an automobile’s engine in the overall state of traveling amounts to 1 1,000 – 4,000 rotations each and every minute (17 – 67 per second). Because it is difficult to rotate tires with the same rotation quickness 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 named deceleration; the ratio of the rotation speed of engine and that of tires is named the reduction ratio.
Then, why is it necessary to modify the reduction ratio in accordance with the acceleration / deceleration or driving speed ? It is because substances require a large force to start moving however they usually do not require such a sizable force to keep moving once they have began to move. Automobile can 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 very much resembles the principle of leverage (a lever). The ratio of the amount of the teeth of gears meshing with one another can be deemed as the ratio of the space of levers’ arms. That is, if the reduction ratio is huge and the rotation swiftness as output is lower in comparison to that as input, the power output by transmission (torque) will be large; if the rotation quickness as output isn’t so low in comparison to that as insight, however, the power output by transmission (torque) will be small. Thus, to improve the reduction ratio utilizing transmitting is much comparable to the theory of moving things.
Then, 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 mechanism consisting of 4 components, namely, sunlight gear A, several world gears B, internal gear C and carrier D that connects world gears as observed in the graph below. It has a very complex framework rendering its design or production most challenging; it can realize the high reduction ratio through gears, however, it is a mechanism suitable for a reduction mechanism that requires both small size and powerful such as transmission for automobiles.
In a planetary gearbox, many teeth are involved at once, that allows high speed decrease to be performed with relatively small gears and lower inertia reflected back to the engine. Having multiple teeth reveal the load also enables planetary gears to transmit high levels of torque. The mixture of compact size, huge speed decrease and high torque tranny makes planetary gearboxes a favorite choice for space-constrained applications.
But planetary gearboxes perform have some disadvantages. Their complexity in style and manufacturing tends to make them a more expensive remedy than additional 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 can occur, leading to premature wear and failure. Also, the compact footprint of planetary gears makes warmth dissipation more difficult, therefore applications that run at high speed or encounter continuous procedure 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 (often bevel gears with helical teeth) 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 (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 use with state-of-the-art servo engine technology, providing limited integration of the motor to the unit. Design features include installation any servo motors, standard low backlash, high torsional stiffness, 95 to 97% efficiency and tranquil running.
They are available in nine sizes with reduction 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 without the need for a coupling. For high precision applications, backlash amounts down to 1 arc-minute are available. Right-angle and insight shaft versions of these reducers are also available.
Usual applications for these reducers include precision rotary axis drives, traveling gantries & columns, materials 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 & surface gearing with minimal put on, low backlash and low noise, making them the the majority of accurate and efficient planetaries available. Standard planetary design has three planet gears, with an increased torque edition using four planets also offered, 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 program particular radial load, axial load and tilting moment reinforcement. Oversized tapered roller bearings are regular for the ISO Flanged Reducers.
Housing: Single piece metal housing with integral band gear provides greater concentricity and get rid of speed fluctuations. The casing can be installed with a ventilation module to increase insight speeds and lower operational temperatures.
Output: Available in a good shaft with optional keyway or an ISO 9409-1 flanged interface. We offer an array 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 rely on the driven load, the swiftness vs. time 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 reviewed by our engineers, who will recommend the best solution for the application.
planetary gear reduction Ever-Power Automation’s Gearbox products offer high precision at affordable prices! The Planetary Gearbox product 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 are available in sizes from 40mm to 180mm, well suited for motors ranging 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 can be found in up to 30 different gear 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 superb gearbox value for servo, stepper, and other motion 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 available 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 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 – simple to manufacture and suitable for an array of applications.
One’s tooth of a spur gear have got an involute profile and mesh 1 tooth at the same time. The involute type implies that spur gears simply generate radial forces (no axial forces), however the method of tooth meshing causes high pressure on the gear one’s teeth and high noise creation. Because of this, spur gears are usually used for lower swiftness applications, although they can be utilized at nearly every speed.
An involute products 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 an individual point where the involutes satisfy. This aspect actions along the tooth areas as the gears rotate, and the type of force ( referred to as the line of actions ) is usually tangent to both foundation circles. Therefore, 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 for example steel or brass, or from plastics such as nylon or polycarbonate. Gears manufactured from plastic produce less audio, but at the difficulty of power and loading capacity. Unlike other equipment types, spur gears don’t encounter high losses because of slippage, therefore they often have high transmission functionality. Multiple spur gears can be employed in series ( referred to as a gear 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 opposite directions. Internal gears, in contrast, have the teeth that are cut inside surface of the cylinder. An exterior 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 more compact than external gear assemblies. Internal gears are primarily used for planetary gear drives.
Spur gears are usually seen as best for applications that require speed decrease 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 amounts – include consumer appliances such as washing machines and blenders. Even though noise limits the utilization of spur gears in passenger automobiles, they are generally used in aircraft engines, trains, and even bicycles.