Many “gears” are utilized for automobiles, but they are also utilized for many various other machines. The most typical one may be the “transmitting” that conveys the power of engine to tires. There are broadly two roles the transmission of a car plays : one is to decelerate the high rotation acceleration emitted by the engine to transmit to tires; the additional is to change the reduction ratio in accordance with the acceleration / deceleration or traveling speed of an automobile.
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 speed to perform, it is necessary to lower the rotation speed utilizing the ratio of the number of gear teeth. Such a role is called deceleration; the ratio of the rotation rate of engine and that of wheels 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 need a large force to begin moving however they do not require this kind of a large force to keep moving once they have began to move. Automobile could be cited as an example. An engine, however, by its nature can’t so finely change its output. Therefore, one adjusts its output by changing the decrease ratio utilizing a transmission.
The transmission of motive power through gears very much resembles the principle of leverage (a lever). The ratio of the number of the teeth of gears meshing with one another can be deemed as the ratio of the length of levers’ arms. That is, if the decrease ratio is large and the rotation speed as output is lower in comparison compared to that as input, the power output by tranny (torque) will be large; if the rotation speed as output is not so lower in comparison to that as input, however, the energy output by tranny (torque) will be little. Thus, to improve the reduction ratio utilizing transmitting is much akin to the basic principle of moving things.
Then, how does a tranny change the reduction ratio ? The answer lies in the mechanism called a planetary gear mechanism.
A planetary gear mechanism is a gear system consisting of 4 components, namely, sunlight gear A, several world gears B, internal equipment C and carrier D that connects world gears as seen in the graph below. It has a very complex framework rendering its style or production most challenging; it can understand the high decrease ratio through gears, nevertheless, it really 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 involved at once, which allows high speed reduction to be achieved with fairly small gears and lower inertia reflected back to the motor. Having multiple teeth share the load also enables planetary gears to transmit high levels of torque. The combination of compact size, large speed reduction and high torque tranny makes planetary gearboxes a popular choice for space-constrained applications.
But planetary gearboxes perform have some disadvantages. Their complexity in style and manufacturing can make them a far more expensive answer than various other gearbox types. And precision production is extremely important for these gearboxes. If one planetary equipment is put closer to the sun gear than the others, imbalances in the planetary gears can occur, resulting in premature wear and failing. Also, the small footprint of planetary gears makes heat dissipation more difficult, so applications that run at very high speed or experience continuous operation may require cooling.
When utilizing a “standard” (i.electronic. inline) planetary gearbox, the motor and the driven equipment must be inline with one another, although manufacturers provide right-angle designs that incorporate other gear sets (often bevel gears with helical the teeth) to provide 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 is dependent 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 perfect for use in applications that demand powerful, precise positioning and repeatability. They were specifically developed for make use of with state-of-the-art servo electric motor technology, providing tight integration of the motor to the unit. Style features include installation any servo motors, regular low backlash, high torsional stiffness, 95 to 97% efficiency and noiseless 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 can 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 right down to 1 arc-minute can be found. Right-angle and insight shaft versions of these reducers are also obtainable.
Common 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 use, low backlash and low sound, making them the most accurate and efficient planetaries obtainable. Standard planetary style has three world gears, with a higher 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 output bearing configurations for program specific radial load, axial load and tilting second reinforcement. Oversized tapered roller bearings are regular for the ISO Flanged Reducers.
Housing: Single piece metal housing with integral ring gear provides better concentricity and get rid of speed fluctuations. The casing can be fitted with a ventilation module to increase input speeds and lower operational temperatures.
Result: Available in a good shaft with optional keyway or an ISO 9409-1 flanged interface. We offer a wide range of standard pinions to mount right to the output design of your choice.
Unit Selection
These reducers are typically selected based on the peak cycle forces, which often happen during accelerations and decelerations. These cycle forces depend on the driven load, the velocity vs. period profile for the cycle, and any other external forces acting on the axis.
For application & selection assistance, please call, fax or email us. Your application info will be examined by our engineers, who’ll recommend the best solution for the application.
Ever-Power Automation’s Gearbox products offer high precision in affordable prices! The Planetary Gearbox product 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, ideal for motors which range from NEMA 17 to NEMA 42 and bigger. The Spur Gearbox collection provides an efficient, cost-effective choice 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 ratings 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 good gearbox value for servo, stepper, and other motion control applications requiring a NEMA size input/output interface. It includes 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
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 straight and oriented parallel to the shafts. They’re arguably the simplest and most common type of gear – easy to manufacture and suitable for a range of applications.
One’s the teeth of a spur gear have got an involute profile and mesh 1 tooth at the same time. The involute type means that 201910301148372667453spur gears just generate radial forces (no axial forces), nevertheless the approach to tooth meshing causes ruthless on the gear the teeth and high noise creation. Because of this, spur gears are often utilized for lower swiftness applications, although they can be utilized at nearly every speed.
An involute equipment tooth includes a profile this is the involute of a circle, which means that since two gears mesh, they get in touch with at an individual point where in fact 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 certainly tangent to both foundation circles. Hence, the gears adhere 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 metal or brass, or from planetary gear reduction plastics such as for example nylon or polycarbonate. Gears produced from plastic produce less sound, but at the difficulty of power and loading capability. Unlike other products types, spur gears don’t encounter high losses due to slippage, therefore they often have high transmission functionality. 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 the teeth that are cut externally surface area of the cylinder. Two external gears mesh with each other and rotate in opposing directions. Internal gears, in contrast, have tooth that are cut inside surface area of the cylinder. An exterior gear sits inside the internal gear, and the gears rotate in the same path. Because the shafts sit closer together, internal equipment assemblies are more compact than external equipment assemblies. Internal gears are mainly used for planetary equipment 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 equipment. Examples of high- velocity applications that use spur gears – despite their high noise levels – include consumer home appliances such as washing machines and blenders. And while noise limits the use of spur gears in passenger automobiles, they are generally used in aircraft engines, trains, and even bicycles.