Many “gears” are utilized for automobiles, however they are also utilized for many other machines. The most frequent one may be the “tranny” that conveys the power of engine to tires. There are broadly two functions the transmission of an automobile plays : one is usually to decelerate the high rotation quickness emitted by the engine to transmit to tires; the other is to improve the reduction ratio in accordance with the acceleration / deceleration or generating speed of a car.
The rotation speed of an automobile’s engine in the overall state of generating amounts to at least one 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 run, it is necessary 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 velocity of engine and that of tires is named the reduction ratio.
Then, why is it necessary to change the reduction ratio in accordance with the acceleration / deceleration or driving speed ? The reason being substances need a large force to start moving however they usually do not require such a large force to excersice once they have began to move. Automobile could be cited as a good example. An engine, nevertheless, by its character can’t so finely alter its output. Consequently, one adjusts its result by changing the decrease ratio employing 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 space of levers’ arms. That is, if the reduction ratio is huge and the rotation velocity as output is low in comparison compared to that as input, the power output by transmission (torque) will be large; if the rotation swiftness as output isn’t so low in comparison to that as insight, however, the energy output by transmitting (torque) will be little. Thus, to improve the reduction ratio utilizing transmission is much comparable to the basic principle of moving things.
Then, how does a transmission modify the reduction ratio ? The answer lies in the mechanism called a planetary equipment mechanism.
A planetary gear system is a gear system comprising 4 components, namely, sun gear A, several world gears B, internal equipment C and carrier D that connects world gears as observed in the graph below. It includes a very complex structure rendering its style or production most difficult; it can understand the high decrease ratio through gears, nevertheless, it 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 engaged at once, that allows high speed reduction to be performed with fairly small gears and lower inertia reflected back again to the motor. Having multiple teeth discuss the load also allows planetary gears to transmit high levels of torque. The mixture of compact size, huge speed decrease 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 more expensive option than other gearbox types. And precision manufacturing is extremely important for these gearboxes. If one planetary equipment is positioned closer to sunlight gear compared to the others, imbalances in the planetary gears can occur, resulting in premature wear and failure. Also, the compact footprint of planetary gears makes heat dissipation more difficult, therefore applications that run at very high speed or experience continuous procedure may require cooling.
When using a “standard” (i.electronic. inline) planetary gearbox, the motor and the driven equipment should be inline with one another, although manufacturers provide right-angle designs that integrate other gear sets (often bevel gears with helical tooth) 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 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 (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 engine input SAE C or D hydraulic
Precision Planetary Reducers
This standard selection of Precision Planetary Reducers are ideal for use in applications that demand high performance, precise positioning and repeatability. These were specifically developed for use with state-of-the-art servo engine technology, providing limited integration of the engine to the unit. Style features include mounting any servo motors, standard low backlash, high torsional stiffness, 95 to 97% efficiency and peaceful running.
They can be purchased in nine sizes with reduction ratios from 3:1 to 600:1 and output torque capacities up to 16,227 lb.ft. The output could 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 levels down to 1 arc-minute can be found. Right-angle and input shaft versions of these reducers are also offered.
Standard applications for these reducers include precision rotary axis drives, traveling gantries & columns, materials handling axis drives and digital line shafting. Industries offered include Material Handling, Automation, Aerospace, Machine Tool and Robotics.
Unit Design &
Construction
Gearing: Featuring case-hardened & floor gearing with minimal wear, low backlash and low noise, making them the the majority of accurate and efficient planetaries offered. Standard planetary design has three world gears, with an increased torque edition using four planets also available, please see the Reducers with Result Flange chart on the Unit Ratings tab beneath the “+” unit sizes.
Bearings: Optional result bearing configurations for app particular radial load, axial load and tilting minute reinforcement. Oversized tapered roller bearings are regular for the ISO Flanged Reducers.
Housing: Single piece metal housing with integral band gear provides better concentricity and eliminate speed fluctuations. The housing can be installed 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. We offer an array of standard pinions to install right to the output style of your choice.
Unit Selection
These reducers are typically selected based on the peak cycle forces, which often happen during accelerations and decelerations. These routine forces rely on the powered load, the swiftness vs. time profile for the routine, and any other exterior forces acting on the axis.
For application & selection assistance, please call, fax or email us. The application info will be examined by our engineers, who’ll recommend the very best solution for the application.
Ever-Power Automation’s Gearbox product lines offer high precision in affordable prices! The Planetary Gearbox product offering includes both In-Line and Right-Position configurations, built with the look 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 range provides an efficient, cost-effective option compatible with 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 ratings up to 10,488 in-pounds (167,808 oz-in), and are appropriate for most Servo,
SureGear Planetary Gearboxes for Small Ever-Power Motors
The SureGear PGCN series is a good 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 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 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 are a type of cylindrical gear, 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 suitable for an array of applications.
One’s the teeth of a spur gear have got an involute profile and mesh one tooth at the same time. The involute type means that spur gears just generate radial forces (no axial forces), however the method of 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 could be utilized at almost every speed.
An involute devices tooth includes a profile this is actually the involute of a circle, which means that since two gears mesh, they speak to at a person point where the involutes satisfy. 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 bottom circles. Hence, the gears stick to the essential 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 capability. Unlike other apparatus types, spur gears don’t encounter high losses due to slippage, therefore they often have high transmission performance. Multiple spur gears can be Planetary Gear Reduction employed in series ( referred to as a gear teach ) to attain 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 exterior gears mesh with one another and rotate in opposing directions. Internal gears, on the other hand, have teeth that are cut inside surface area of the cylinder. An exterior gear sits in the internal equipment, and the gears rotate in the same direction. Because the shafts sit closer together, internal gear assemblies are more compact than external equipment assemblies. Internal gears are mainly used for planetary gear drives.
Spur gears are generally seen as best for applications that require speed reduction and torque multiplication, such as ball mills and crushing gear. Types of high- velocity applications that use spur gears – despite their high noise amounts – include consumer devices such as washers and blenders. And while noise limits the usage of spur gears in passenger automobiles, they are often used in aircraft engines, trains, and even bicycles.
