Planetary Gear Drive
Drive type: speed reducer
Result torque: 33,895 Nm (25,000 lb-ft)
Max input speed: 2800 rpm
Selection of input options
Straight in for an on centerline adaptation giving a symmetrical clearance around the hydraulic motor input
Offset straight in enables the hydraulic electric motor be mounted off center
Right angle input movements the hydraulic engine perpendicular to the centerline of the planetary drive for added clearance between components on track drives
With external shaft includes keyed, flanged or spline options to meet the various required output connections
An added output option includes the output without external shaft by offering an interior spline at the output
Planetary Gear Drive
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 linked 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)
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
Planetary Track Drives
High torque and load capacities, to carry 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 small.
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 mechanical seal designed specifically for the earth-moving devices.
Maximum Torque Up to 170,000 Nm
Tranny Ratio Up to 230 iN
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Brevini planetary monitor drives are created for tracked automobiles and earth-moving machines. They have a heavy-duty casing, a short overall size, and great radial and axial load capability.
Our gearboxes are provided with integral multidisc parking brake and also have been created for direct mounting of hydraulic plug-in motors. The careful choice of the components and style allows our monitor drives, CTD and CTU, to be used in the most severe environmental working conditions. Brevini planetary track drive units are the perfect solution for crawled undercarriages, drilling, crushing, screening and piling machines.
Planetary Track 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 driving rubber tired or tracked self-propelled vehicles.
These compact planetary track drives are specifically created 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 directly on hydraulic motors and are prepared to accept ‘plug-in’ hydraulic motors.
> 10 kNm
high-torque, high load capacity
for wheel and track drives, compact, rugged, for construction vehicles
This gear shaft final drive comes with LO-HI speed and was created for increased performance. The item is extremely useful especially in wheeled and tracked machines, which feature a significantly different operating/travel acceleration ratio.
Note that that is also the proper product for street paving devices, along with construction tools and forestry machines.
Last drive motors are hydraulic motors with a speed reducing, torque multiplying planetary gear set. In this article, we’ll talk about planetary gear units, the parts that make them up, and how they function.
Planetary Gears and Final Drive Motors
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Low Rate, High Torque Motors
The majority of the hydraulic motors used for propel motors are low-speed, high-torque (LSHT) motors. Swiftness 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 word “low-speed, high-torque.” One method of reducing swiftness involves the usage of planetary gears. They provide speed reduction which results in torque multiplication. Plus they do that all in a concise package in comparison with gear and pinion acceleration reducers, and that means they have excellent torque density. Below you can observe a planetary gear program from a final drive motor.
Planetary gear set from a final drive displaying the carrier, ring equipment, sun gear, and planetary gears
Carrier for a couple of three planetary gears from a final drive
Planetary Gear Systems
In your final drive gear hub, you will most likely have two sets of three planetary gears that rotate about a sun gear. In addition they mesh with a stationary band gear. The upper set of planetary gears are kept jointly by a carrier, as demonstrated in the picture above. As you can plainly see, all three gears are arranged the same distance from each other. At the center is a location for sun gear to mesh and offer input to the system.
How Final Drive Planetary Gears Work
Let’s have a simplified look in the way the planetary gears in a final drive work. Insight power causes sunlight gear to rotate at high acceleration. The planets mesh with both the sun gear and the ring gear. They orbit the sun gear while rolling around the band gear. The result is low speed, high torque output rotation.
Maintaining the Planetary Gearbox
On your final drive engine, the planetary gearbox needs gear oil, also called gear lube. It is essential to check the gear oil levels about every 100 hours and change the apparatus oil one per year. If you don’t alter out your gear essential oil, you’ll finish up with a thicker sludge that will result in excessive wear of your planetary gear system. Here at Texas Last Drive, we make reference to that as “pudding.”
Another key facet of keeping your planetary gearbox is usually fixing any leaking seals immediately. If a seal is usually degraded enough to allow essential oil to leak out, after that that means dirt and dirt can make their method in. You don’t want to have your gears appear to be the gritty mess proven below.
Your planetary gearbox is an essential component of your final drive. If it fails, you won’t be able to generate the torque you should keep your machine moving. Remember to check and alter the gear essential oil and don’t disregard 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 wonderful performance characteristics of the PGR/PGW series of gear units make these especially suitable for traveling rubber tired or tracked self-propelled vehicles.
Planetary Gear Drive