planetary track drive

Planetary Gear Drive
Drive type: speed reducer
Output torque: 33,895 Nm (25,000 lb-ft)
Max input speed: 2800 rpm
Features
Selection of input options
Straight in for an upon centerline adaptation offering 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 elements on track drives
Output options
With external shaft includes keyed, flanged or spline options to meet up the many required output connections
An added output option includes the output without exterior shaft by providing an internal 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 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)
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 carry equipment more than the roughest and steepest terrain.
Designed to allow installation 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 places easy to reach.
Front side mechanical seal designed specifically for the earth-moving machines.
Maximum Torque Up to 170,000 Nm
Transmission Ratio Up to 230 iN
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Brevini planetary track drives are designed for tracked automobiles and earth-moving devices. They possess a heavy-duty casing, a brief overall duration, and great radial and axial load capability.
Our gearboxes are provided with integral multidisc parking brake and have been designed for direct installation of hydraulic plug-in motors. The careful selection of the components and design allows our track drives, CTD and CTU, to be used in the most severe environmental working conditions. Brevini planetary track drive units are the perfect remedy for crawled undercarriages, drilling, crushing, screening and piling devices.
Planetary Track and Wheel drives
The modern and innovative style, the compact construction and the excellent performance characteristics of the PGR/PGW group of gear units make these especially ideal for driving rubber tired or tracked self-propelled vehicles.
These compact planetary monitor drives are specifically designed 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 intrinsic multidisc failsafe brake and may be installed on hydraulic motors and are ready 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 track drives, compact, rugged, for construction vehicles
Description
This gear shaft final drive includes LO-HI speed and was designed for increased performance. That is extremely useful specifically in wheeled and tracked machines, which feature a considerably different operating/travel speed ratio.
Note that this is also the proper product for street paving devices, along with construction equipment 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 models, the parts that produce them up, and how they function.
Planetary Gears and Last Drive Motors
Here are a few other blog posts you might enjoy ..
Last Drive Motors and Gears
3 Things You Should Know About Gear Essential oil for Final Drives
How to Troubleshoot an Overheating Gear Box
Low Velocity, High Torque Motors
The majority of the hydraulic motors used for propel motors are low-speed, high-torque (LSHT) motors. Speed and torque are related by power:
Power = Speed x Torque
That means if we want to boost torque for a given horsepower, we have to reduce speed:
Torque = Power / Speed
Hence the term “low-speed, high-torque.” One method of reducing speed involves the use of planetary gears. They offer speed reduction which results in torque multiplication. And they do that all in a compact package when compared to gear and pinion swiftness reducers, and which means they have excellent torque density. Below you can observe a planetary gear system from a final drive motor.
Planetary gear arranged from your final drive displaying the carrier, ring equipment, sun equipment, and planetary gears
Carrier for a couple of 3 planetary gears from a final drive
Planetary Gear Systems
In your final drive gear hub, you will usually have two sets of three planetary gears that rotate in regards to a sun gear. They also mesh with a stationary band gear. The upper set of planetary gears are kept collectively by a carrier, as proven in the picture above. As possible plainly see, all three gears are arranged an equal distance from one another. At the guts is a location for sun gear to mesh and provide input to the system.
How Last Drive Planetary Gears Work
Let’s have a simplified look in the way the planetary gears in a final drive work. Input power causes the sun equipment to rotate at high acceleration. The planets mesh with both sun equipment and the ring equipment. They orbit the sun gear while rolling around the band gear. The effect is low rate, high torque output rotation.
Maintaining the Planetary Gearbox
On your final drive engine, the planetary gearbox needs gear oil, also referred to as gear lube. It is essential to check the gear oil amounts about every 100 hours and change the gear oil one per year. If you don’t modify out your gear essential oil, you’ll finish up with a thicker sludge that will result in excessive put on of your planetary gear system. At Texas Final Drive, we refer to that as “pudding.”
Another key facet of maintaining your planetary gearbox is certainly fixing any leaking seals right away. If a seal can be degraded enough to permit essential oil to leak out, after that that means dirt and dirt can make their method in. You don’t want your gears look like the gritty mess shown below.
final-drive-hydraulic-motor-gear-oil-sludge-2
Conclusion
Your planetary gearbox is a key component of your final drive. If it fails, you won’t be able to generate the torque you should keep your machine shifting. Remember to check and change the gear oil and don’t disregard leaks. And don’t forget that pudding and grit aren’t what you need in your gearbox!
The present day and innovative design, the compact construction and the excellent performance characteristics of the PGR/PGW group of gear units make these especially suitable for generating rubber tired or tracked self-propelled vehicles.

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