Planetary Gear Drive
Drive type: speed reducer
Result torque: 33,895 Nm (25,000 lb-ft)
Max input speed: 2800 rpm
Variety of input options
Straight in for an upon 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 moves 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 many required output connections
An added output choice includes the result without external shaft by offering an internal 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 related to ratio and max result speed
3 Max radial load placed at optimum load position
4 Weight varies with configuration and ratio Planetary Track Drive 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 engine inputSAE C or D
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 small.
Steel or high-influence spheroidal cast iron framework.
Primary bearings provided for high radial and axial load capacities.
Easy maintenance: filling and draining ports locations easy to reach.
Front side mechanical seal designed specifically for the earth-moving devices.
Optimum Torque Up to 170,000 Nm
Tranny Ratio Up to 230 iN
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Brevini planetary track drives are made for tracked automobiles and earth-moving devices. They possess a heavy-duty casing, a short overall length, and great radial and axial load capability.
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 materials and style allows our track drives, CTD and CTU, to be used in the most severe environmental working circumstances. Brevini planetary monitor drive units will be the perfect option for crawled undercarriages, drilling, crushing, screening and piling machines.
Planetary Track 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 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 includes LO-HI speed and was designed for increased performance. That is extremely useful especially in wheeled and tracked devices, which feature a significantly different operating/travel acceleration ratio.
Note that that is also the proper product for road paving devices, along with construction equipment and forestry machines.
Last drive motors are hydraulic motors with a speed reducing, torque multiplying planetary gear set. In this post, 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. Acceleration 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 method of reducing acceleration involves the use of planetary gears. They offer speed reduction which results in torque multiplication. Plus they do that all in a compact package in comparison with gear and pinion quickness reducers, and which means they have excellent torque density. Below you can view a planetary gear system from a final drive motor.
Planetary gear established from your final drive showing the carrier, ring equipment, sun equipment, and planetary gears
Carrier for a set of three planetary gears from your final drive
Planetary Gear Systems
In your final drive gear hub, you will most likely have two sets of three planetary gears that rotate in regards to a sun gear. They also mesh with a stationary ring gear. The upper group of planetary gears are held with each other by a carrier, as shown in the picture above. As possible plainly see, all three gears are arranged the same distance from one another. At the guts is a place for sun gear to mesh and provide input to the system.
How Final Drive Planetary Gears Work
Let’s take a simplified look at the way the planetary gears in your final drive work. Insight power causes the sun gear to rotate at high acceleration. The planets mesh with both the sun equipment and the ring gear. They orbit sunlight gear while rolling around the ring gear. The effect is low swiftness, high torque result rotation.
Maintaining the Planetary Gearbox
On a final drive motor, the planetary gearbox requires gear oil, also known as equipment lube. It is vital to check the apparatus oil amounts about every 100 hours and change the gear oil one per year. If you don’t change out your gear oil, you’ll end up with a solid sludge that will lead to excessive put on of your planetary gear system. Here at Texas Final Drive, we refer to that as “pudding.”
Another key aspect of maintaining 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 your gears look like 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 need to keep your machine moving. Remember to check and modify the gear oil and don’t disregard leaks. And don’t forget that pudding and grit aren’t the thing 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 ideal for generating rubber tired or tracked self-propelled vehicles.
Planetary Gear Drive