Planetary Gear Drive
Drive type: speed reducer
Result torque: 33,895 Nm (25,000 lb-ft)
Max input speed: 2800 rpm
Features
Variety of input options
Straight set for an upon centerline adaptation giving a symmetrical clearance about the hydraulic motor input
Offset straight in enables the hydraulic engine be mounted off center
Right angle input movements the hydraulic motor perpendicular to the centerline of the planetary drive for added clearance between components on track drives
Output options
With external shaft includes keyed, flanged or spline options to meet the various required output connections
An added output choice includes the result without exterior shaft by offering an interior spline at the output
F25R
Planetary Gear Drive
Ratings
Input power (max)71 kW (95 hp)
Input speed (max)2800 rpm2
Output torque (intermittent)33,895 Nm (25,000 lb-ft)
Output torque (continuous)18,710 Nm (13,800 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)
General data
Approximate dry weight215 – 263 kg (475 – 580 lb)4
Radial load (max)28,570 kg (63,000 lb)3
Drive typeSpeed reducer
Hydraulic engine inputSAE C or D
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Planetary Track Drives
High torque and load capacities, to transport equipment more than the roughest and steepest terrain.
Designed to allow mounting of plug-in motors.
Integral multi-disc parking brakes, whilst still keeping the drive compact.
Steel or high-effect spheroidal cast iron framework.
Main bearings provided for high radial and axial load capacities.
Easy maintenance: filling and draining ports locations easy to reach.
Front side mechanical seal designed particularly for the earth-moving machines.
Optimum Torque Up to 170,000 Nm
Transmitting Ratio Up to 230 iN
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Brevini planetary track drives are created for tracked automobiles and earth-moving machines. They possess a heavy-duty casing, a short overall duration, and great radial and axial load capability.
Our gearboxes are provided with essential multidisc parking brake and have been designed for direct mounting of hydraulic plug-in motors. The careful choice of the components and design allows our monitor drives, CTD and CTU, to be utilized in the most severe environmental working circumstances. Brevini planetary monitor drive units are the Planetary Track Drive perfect option for crawled undercarriages, drilling, crushing, screening and piling machines.
Planetary Monitor and Wheel drives
The modern and innovative style, the compact construction and the wonderful performance characteristics of the PGR/PGW group of gear units make these especially suitable for traveling rubber tired or tracked self-propelled vehicles.
These compact planetary monitor drives are specifically made for tracked vehicles: excavators and earth-moving machines.
They have a heavy-duty casing, a brief overall length, and great radial and axial load capacity.
They have an integral multidisc failsafe brake and may be installed directly on hydraulic motors and are prepared to accept ‘plug-in’ hydraulic motors.
Characteristics
Type:
planetary
Shaft orientation:
coaxial
Torque:
> 10 kNm
Performance:
high-torque, high load capacity
Other characteristics:
for wheel and monitor drives, compact, rugged, for construction vehicles
Description
This gear shaft final drive comes with LO-HI speed and was made for increased performance. The item is extremely useful especially in wheeled and tracked machines, which feature a significantly different operating/travel rate ratio.
Note that this is also the proper product for road paving devices, along with construction tools and forestry machines.
Final drive motors are hydraulic motors with a speed reducing, torque multiplying planetary gear arranged. In this article, we’ll talk about planetary gear units, the parts that produce them up, and how they function.
Planetary Gears and Final Drive Motors
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Low Quickness, High Torque Motors
Most of the hydraulic motors used for propel motors are low-speed, high-torque (LSHT) motors. Quickness and torque are related by power:
Power = Speed x Torque
That means if we want to enhance torque for a given horsepower, we need to reduce speed:
Torque = Power / Speed
Hence the term “low-speed, high-torque.” One method of reducing rate involves the use of planetary gears. They offer speed reduction which outcomes in torque multiplication. Plus they do that all in a concise package when compared to gear and pinion acceleration reducers, and which means they have exceptional torque density. Below you can view a planetary gear system from a final drive motor.
Planetary gear established from your final drive displaying the carrier, ring equipment, sun gear, and planetary gears
Carrier for a set of 3 planetary gears from your final drive
Planetary Gear Systems
In a final drive gear hub, you will usually have two sets of three planetary gears that rotate about a sun gear. In addition they mesh with a stationary ring gear. The upper set of planetary gears are kept jointly by a carrier, as demonstrated in the image above. As you can see, all three gears are arranged the same distance from each other. At the guts is a place for sun gear to mesh and offer input to the machine.
How Final Drive Planetary Gears Work
Let’s have a simplified look in how the planetary gears in your final drive work. Insight power causes sunlight equipment to rotate at high velocity. The planets mesh with both the sun equipment and the ring equipment. They orbit the sun equipment while rolling around the ring gear. The effect is low velocity, high torque result rotation.
Maintaining the Planetary Gearbox
On your final drive engine, the planetary gearbox needs gear oil, also referred to as equipment lube. It is essential to check the apparatus oil levels about every 100 hours and change the gear oil once a year. If you don’t modify out your gear essential oil, you’ll end up with a thick sludge that will lead to excessive use of your planetary gear system. At Texas Final Drive, we make reference to that as “pudding.”
Another key facet of maintaining your planetary gearbox is definitely fixing any leaking seals right away. If a seal is certainly degraded enough to permit essential oil to leak out, after that which means dirt and dirt can make their way in. You do not want to have your gears appear to be the gritty mess demonstrated below.
final-drive-hydraulic-motor-gear-oil-sludge-2
Conclusion
Your planetary gearbox is an essential component of your final drive. If it fails, you won’t have the ability to generate the torque you should keep your machine shifting. Remember to check and alter the gear oil and don’t ignore leaks. Also keep in mind that pudding and grit aren’t what you need in your gearbox!
The present day and innovative style, the compact construction and the excellent performance characteristics of the PGR/PGW series of gear units make these especially ideal for generating rubber tired or tracked self-propelled vehicles.