Many “gears” are utilized for automobiles, however they are also used for many additional machines. The most frequent one may be the “tranny” that conveys the power of engine to tires. There are broadly two roles the transmission of an automobile plays : one is certainly to decelerate the high rotation velocity emitted by the engine to transmit to tires; the other is to change the reduction ratio relative to the acceleration / deceleration or traveling speed of an automobile.
The rotation speed of an automobile’s engine in the overall state of driving amounts to 1 1,000 – 4,000 rotations each and every minute (17 – 67 per second). Since it is not possible to rotate tires with the same rotation quickness to run, it is required to lessen 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 speed of engine and that of wheels is called 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 start moving however they usually do not require such a huge force to keep moving once they have began to move. Automobile could be cited as a good example. An engine, nevertheless, by its nature can’t so finely alter its output. For that reason, 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 teeth of gears meshing with one another can be deemed as the ratio of the distance of levers’ arms. That is, if the decrease ratio is large and the rotation speed as output is low in comparison to that as insight, the energy output by transmitting (torque) will be huge; if the rotation quickness as output is not so lower in comparison compared to that as input, however, the power output by transmitting (torque) will be little. Thus, to improve the decrease ratio utilizing transmission is much comparable to the theory of moving things.
Then, how does a transmitting alter the reduction ratio ? The answer lies in the system called a planetary equipment mechanism.
A planetary gear mechanism is a gear mechanism comprising 4 components, namely, sunlight gear A, several planet gears B, internal gear C and carrier D that connects world gears as seen in the graph below. It has a very complex framework rendering its design or production most challenging; it can understand the high decrease ratio through gears, however, it really is a mechanism suitable for a reduction system that requires both small size and powerful such as transmission for automobiles.
In a planetary gearbox, many teeth are involved at once, which allows high speed reduction to be achieved with relatively small gears and lower inertia reflected back again to the motor. Having multiple teeth share the load also allows planetary gears to transmit high levels of torque. The mixture of compact size, huge speed reduction and high torque tranny makes planetary gearboxes a favorite choice for space-constrained applications.
But planetary gearboxes do have some Planetary Gear Reduction disadvantages. Their complexity in style and manufacturing tends to make them a more expensive alternative than various other gearbox types. And precision production is extremely important for these gearboxes. If one planetary equipment is put closer to sunlight gear than the others, imbalances in the planetary gears may appear, resulting in premature wear and failure. Also, the small footprint of planetary gears makes high temperature dissipation more difficult, therefore applications that run at high speed or experience continuous operation may require cooling.
When using a “standard” (i.electronic. inline) planetary gearbox, the motor and the driven equipment must be inline with one another, although manufacturers offer right-angle designs that include other gear sets (often bevel gears with helical teeth) 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 is dependent on the drive configuration.
2 Max input speed related to ratio and max result 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 high performance, 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 mounting any servo motors, standard low backlash, high torsional stiffness, 95 to 97% efficiency and calm running.
They can be purchased in nine sizes with decrease ratios from 3:1 to 600:1 and output 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 components without the need for a coupling. For high precision applications, backlash amounts down to 1 arc-minute can be found. Right-angle and input shaft versions of these reducers are also offered.
Usual applications for these reducers include precision rotary axis drives, traveling gantries & columns, materials handling axis drives and electronic line shafting. Industries served include Material Handling, Automation, Aerospace, Machine Tool and Robotics.
Unit Design &
Construction
Gearing: Featuring case-hardened & ground gearing with minimal wear, low backlash and low noise, making them the many accurate and efficient planetaries available. Standard planetary style has three planet gears, with an increased torque version using four planets also available, please see the Reducers with Output Flange chart on the machine Ratings tab under the “+” unit sizes.
Bearings: Optional result bearing configurations for software specific radial load, axial load and tilting moment reinforcement. Oversized tapered roller bearings are regular for the ISO Flanged Reducers.
Housing: Single piece steel housing with integral ring gear provides higher concentricity and get rid of speed fluctuations. The housing can be fitted with a ventilation module to increase insight speeds and lower operational temps.
Result: Available in a solid shaft with optional keyway or an ISO 9409-1 flanged interface. We offer an array of standard pinions to mount right to the output style of your choice.
Unit Selection
These reducers are usually selected based on the peak cycle forces, which usually happen during accelerations and decelerations. These cycle forces rely on the driven load, the quickness 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 information will be reviewed by our engineers, who’ll recommend the very best solution for your application.
Ever-Power Automation’s Gearbox product lines offer high precision at affordable prices! The Planetary Gearbox item offering contains both In-Line and Right-Angle configurations, built with the look goal of offering a cost-effective gearbox, without sacrificing quality. These Planetary Gearboxes can be found in sizes from 40mm to 180mm, well suited for motors ranging from NEMA 17 to NEMA 42 and bigger. The Spur Gearbox range 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 gear ratios, with torque rankings up to 10,488 in-lbs (167,808 oz-in), and are compatible with most Servo,
SureGear Planetary Gearboxes for Little 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 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
Free of maintenance; requires no additional lubrication
NEMA sizes 17, 23, and 34
Includes hardware for mounting 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 equipment, with shafts that are parallel and coplanar, and the teeth that are directly and oriented parallel to the shafts. They’re arguably the simplest and most common kind of gear – easy to manufacture and suitable for a range of applications.
One’s teeth of a spur gear have 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), 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 often used 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 implies that since two gears mesh, they speak to at an individual point where the involutes meet. This aspect motions along the tooth areas as the gears rotate, and the type of force ( known as the line of actions ) can be tangent to both base circles. Hence, the gears stick 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 possibly be produced from metals such as steel or brass, or from plastics such as for example nylon or polycarbonate. Gears produced from plastic produce much less sound, but at the difficulty of power and loading capacity. Unlike other devices types, spur gears don’t encounter high losses due to slippage, therefore they often times have high transmission overall performance. Multiple spur gears can be employed in series ( known as a gear 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 of the cylinder. Two exterior gears mesh with each other and rotate in opposite directions. Internal gears, on the other hand, have the teeth that are cut on the inside surface of the cylinder. An exterior gear sits inside 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 equipment assemblies. Internal gears are primarily used for planetary equipment drives.
Spur gears are usually viewed as best for applications that require speed decrease and torque multiplication, such as 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 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.