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 set for an upon centerline adaptation giving a symmetrical clearance about the hydraulic motor input
Offset straight in enables the hydraulic electric motor be mounted off center
Right angle input techniques the hydraulic electric motor perpendicular to the centerline of the planetary drive for added clearance between parts 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 result without external 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 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 (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 electric motor inputSAE C or D
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Planetary Track Drives
High torque and load capacities, to carry equipment over the roughest and steepest terrain.
Designed to allow mounting of plug-in motors.
Integral multi-disc parking brakes, while still keeping the drive small.
Steel or high-effect spheroidal cast iron structure.
Main bearings provided for high radial and axial load capacities.
Easy maintenance: filling and draining ports places easy to reach.
Front mechanical seal designed particularly for the earth-moving devices.
Optimum Torque Up to 170,000 Nm
Transmitting Ratio Up to 230 iN
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Brevini planetary track drives are designed for tracked vehicles and earth-moving devices. They have a heavy-duty casing, a short overall size, and great radial and axial load capacity.
Our gearboxes are given with essential multidisc parking brake and also have been made for direct installation of hydraulic plug-in motors. The careful choice of the components and style allows our monitor drives, CTD and CTU, to be utilized in the most serious environmental working conditions. Brevini planetary monitor drive units are the perfect remedy for crawled undercarriages, drilling, crushing, screening and piling devices.
Planetary Monitor and Wheel drives
The present day and innovative design, the compact construction and the excellent performance characteristics of the PGR/PGW series of gear units make these especially suitable for traveling rubber tired or tracked self-propelled vehicles.
These compact planetary track drives are specifically made for tracked vehicles: excavators and earth-moving machines.
They have a heavy-duty casing, a short overall length, and great radial and axial load capacity.
They have an intrinsic multidisc failsafe brake and will 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 made for increased performance. That is extremely useful specifically in wheeled and tracked machines, which feature a significantly different operating/travel acceleration ratio.
Note that this is also the right product for road paving devices, along with construction equipment and forestry machines.
Final drive motors are hydraulic motors with a speed reducing, torque multiplying planetary gear set. In this article, we’ll talk about planetary gear pieces, the parts that produce them up, and how they work.
Planetary Gears and Last Drive Motors
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3 Things YOU HAVE TO KNOW About Gear Oil for Final Drives
How to Troubleshoot an Overheating Gear Box
Low Acceleration, High Torque Motors
The majority 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 confirmed horsepower, we have to reduce speed:
Torque = Power / Speed
Hence the word “low-speed, high-torque.” One way of reducing rate involves the use of planetary gears. They offer speed reduction which outcomes in torque multiplication. And they do this all in a concise package in comparison with gear and pinion rate reducers, and which means they have exceptional torque density. Below you can see a planetary gear program from a final drive motor.
Planetary gear arranged from your final drive displaying the carrier, ring equipment, sun gear, and planetary gears
Carrier for a set of three 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 in regards to a sun gear. In addition they mesh with a stationary band gear. The upper set of planetary gears are kept with each other by a carrier, as shown in the picture above. As you can plainly see, all three gears are organized the same distance from each other. At the guts is a location for sun equipment to mesh and provide input to the machine.
How Final Drive Planetary Gears Work
Let’s take a simplified look in the way the planetary gears in a final drive work. Insight power causes the sun equipment to rotate at high speed. The planets mesh with both the sun equipment and the ring gear. They orbit sunlight equipment while rolling Planetary Track Drive around the band gear. The effect is low quickness, high torque result rotation.
Maintaining the Planetary Gearbox
On your final drive motor, the planetary gearbox needs gear oil, also called equipment lube. It is vital to check the apparatus oil levels about every 100 hours and change the apparatus oil once a year. If you don’t change out your gear essential oil, you’ll finish up with a thick sludge that will lead to excessive wear of your planetary equipment system. At Texas Last Drive, we make reference to that as “pudding.”
Another key facet of maintaining your planetary gearbox is definitely fixing any leaking seals immediately. If a seal is degraded enough to permit essential oil to leak out, after that which 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 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. Be sure you check and alter the gear oil and don’t disregard leaks. Also keep in mind that pudding and grit are not what you need in your gearbox!
The modern 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.