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 a car plays : one is usually to decelerate the high rotation swiftness emitted by the engine to transmit to tires; the other is to change the reduction ratio in accordance with the acceleration / deceleration or traveling speed of a car.
The rotation speed of an automobile’s engine in the overall state of driving amounts to 1 1,000 – 4,000 rotations per minute (17 – 67 per second). Because it is not possible to rotate tires with the same rotation speed to run, it is required to lower the rotation speed using the ratio of the number of gear teeth. Such 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 alter the reduction ratio relative to the acceleration / deceleration or driving speed ? The reason being substances need a large force to begin moving however they usually do not require this kind of a large force to keep moving once they have began to move. Automobile can be cited as an example. An engine, nevertheless, by its nature can’t so finely alter its output. For that reason, one adjusts its output by changing the decrease ratio employing 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 each other can be considered as the ratio of the space of levers’ arms. That is, if the decrease ratio is huge and the rotation speed as output is lower in comparison to that as insight, the energy output by transmission (torque) will be huge; if the rotation speed as output isn’t so low in comparison to that as insight, on the other hand, the energy output by tranny (torque) will be small. Thus, to improve the decrease ratio utilizing transmission is much comparable to the theory of moving things.
After that, how does a transmitting alter the reduction ratio ? The answer lies in the mechanism called a planetary gear mechanism.
A planetary gear mechanism is a gear system comprising 4 components, namely, sunlight gear A, several planet gears B, internal gear C and carrier D that connects planet gears as seen in the graph below. It has a very complex framework rendering its style or production most difficult; it can recognize the high decrease ratio through gears, nevertheless, it is a mechanism suited to a reduction mechanism that requires both small size and powerful such as for example transmission for automobiles.
In a planetary gearbox, many teeth are involved at once, that allows high speed reduction to be achieved with fairly small gears and lower inertia reflected back to the motor. Having multiple teeth reveal the load also allows planetary gears to transmit high levels of torque. The combination 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 far more expensive solution than additional gearbox types. And precision manufacturing is extremely important for these gearboxes. If one planetary gear is put closer to the sun gear compared to the others, imbalances in the planetary gears can occur, resulting in premature wear and failing. Also, the small footprint of planetary gears makes high temperature dissipation more difficult, so applications that run at high speed or encounter continuous procedure may require cooling.
When using a “standard” (i.e. inline) planetary gearbox, the motor and the powered equipment should be inline with each other, although manufacturers provide right-angle designs that integrate 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 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 engine input SAE C or D hydraulic
Precision Planetary Reducers
This standard selection of Precision Planetary Reducers are perfect 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 tight integration of the electric motor to the unit. Design features include installation any servo motors, regular low backlash, high torsional stiffness, 95 to 97% efficiency and calm 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 without the need for a coupling. For high precision applications, backlash levels down to 1 arc-minute can be found. Right-angle and insight shaft versions of these reducers are also offered.
Typical applications for these reducers include precision rotary axis drives, traveling gantries & columns, materials handling axis drives and electronic line shafting. Industries served include Material Managing, 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 the majority of accurate and efficient planetaries obtainable. Standard planetary design has three world gears, with an increased torque version using four planets also offered, please see the Reducers with Result Flange chart on the machine Ratings tab beneath the “+” unit sizes.
Bearings: Optional result bearing configurations for application particular radial load, axial load and tilting moment reinforcement. Oversized tapered roller bearings are regular for the ISO Flanged Reducers.
Housing: Planetary Gear Reduction Single piece steel housing with integral band gear provides better concentricity and eliminate speed fluctuations. The housing can be fitted with a ventilation module to improve insight speeds and lower operational temperature ranges.
Result: Available in a good shaft with optional keyway or an ISO 9409-1 flanged interface. We offer a wide variety of standard pinions to attach directly to the output design of your choice.
Unit Selection
These reducers are typically selected predicated on the peak cycle forces, which often happen during accelerations and decelerations. These routine forces rely on the driven load, the acceleration vs. time profile for the routine, and any other exterior forces functioning on the axis.
For application & selection assistance, please call, fax or email us. Your application details 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 contains both In-Line and Right-Angle configurations, built with the design goal of supplying 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 bigger. The Spur Gearbox line 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 equipment ratios, with torque ratings up to 10,488 in-pounds (167,808 oz-in), and 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 movement control applications requiring a NEMA size input/output interface. It provides the best quality available 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
Maintenance free; 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 are a type of cylindrical equipment, 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 type of gear – simple 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 particular tooth simultaneously. The involute type means that spur gears just generate radial forces (no axial forces), nevertheless the method of tooth meshing causes ruthless on the gear the teeth and high noise creation. Because of this, spur gears are usually utilized for lower swiftness applications, although they could be utilized at nearly every speed.
An involute apparatus tooth carries a profile this is the involute of a circle, which means that since two gears mesh, they speak to at an individual point where in fact the involutes satisfy. This aspect movements along the tooth areas as the gears rotate, and the kind of force ( known as the line of actions ) is definitely tangent to both foundation circles. Hence, the gears adhere to the fundamental regulation of gearing, which promises that the ratio of the gears’ angular velocities must stay continuous through the entire mesh.
Spur gears could be produced from metals such as metal or brass, or from plastics such as nylon or polycarbonate. Gears manufactured from plastic produce less audio, but at the trouble of power and loading capability. Unlike other products types, spur gears don’t encounter high losses because of slippage, therefore they often times have high transmission performance. Multiple spur gears can be employed in series ( known as a equipment teach ) to achieve 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 area of the cylinder. Two external gears mesh with each other and rotate in reverse directions. Internal gears, on the other hand, have tooth that are cut on the inside surface of the cylinder. An external gear sits inside the internal gear, and the gears rotate in the same path. Because the shafts sit closer together, internal gear assemblies are smaller sized 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 decrease and torque multiplication, such as for example ball mills and crushing equipment. Types 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 utilization of spur gears in passenger automobiles, they are often used in aircraft engines, trains, and even bicycles.