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 set for an on 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 techniques the hydraulic engine 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 various required output connections
An added output choice includes the output without exterior 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 would depend on the drive configuration.
2 Max input speed linked to ratio and max output speed
3 Max radial load positioned at optimum load position
4 Weight varies with configuration and ratio selected
5 Requires tapered roller planet bearings (unavailable 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 motor 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 mounting of plug-in motors.
Integral multi-disc parking brakes, whilst still keeping the drive small.
Steel or high-impact 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 side mechanical seal designed particularly for the earth-moving devices.
Optimum Torque Up to 170,000 Nm
Transmission Ratio Up to 230 iN
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Brevini planetary monitor drives are made for tracked automobiles and earth-moving machines. They have a heavy-duty casing, a brief overall length, and great radial and axial load capability.
Our gearboxes are provided with integral multidisc parking brake and also have been made for direct mounting of hydraulic plug-in motors. The careful selection of the materials and design allows our monitor drives, CTD and CTU, to be utilized 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 design, the compact construction and the excellent performance characteristics of the PGR/PGW series of gear units make these especially suitable for generating 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 will be installed directly on hydraulic motors and are ready to accept ‘plug-in’ hydraulic motors.
Shaft orientation:
> 10 kNm
high-torque, high load capacity
Other characteristics:
for wheel and track drives, small, rugged, for construction vehicles
This gear shaft final drive includes LO-HI speed and was made for increased performance. The item is extremely useful especially in wheeled and tracked machines, which feature a considerably different operating/travel speed ratio.
Note that this is also the right product for road paving machines, along with construction products and forestry machines.
Last drive motors are hydraulic motors with a speed reducing, torque multiplying planetary gear established. In this post, we’ll discuss planetary gear pieces, the parts that make them up, and how they function.
Planetary Gears and Final Drive Motors
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Low Velocity, High Torque Motors
The majority of the hydraulic motors used for propel motors are low-speed, high-torque (LSHT) motors. Rate and torque are related by power:
Power = Speed x Torque
That means if you want to enhance torque for confirmed horsepower, we have to reduce speed:
Torque = Power / Speed
Hence the term “low-speed, high-torque.” One way of reducing acceleration involves the utilization of planetary gears. They offer speed reduction which results in torque multiplication. And they do that all in a concise package when compared to gear and pinion rate reducers, and which means they have excellent torque density. Below you can view a planetary gear system from a final drive motor.
Planetary gear arranged from a final drive showing the carrier, ring gear, sun gear, and planetary gears
Carrier for a set of 3 planetary gears from a final drive
Planetary Gear Systems
In a final drive gear hub, you will most likely have two sets of three planetary gears that rotate about a sun gear. They also mesh with a stationary ring gear. The upper group of planetary gears are held jointly by a carrier, as proven in the image above. As you can see, all three gears are organized an equal distance from each other. At the guts is a location for sun gear to mesh and provide input to the system.
How Final Drive Planetary Gears Work
Let’s have a simplified look in how the planetary gears in your final drive work. Input power causes sunlight gear to rotate at high rate. The planets mesh with both sun gear and the ring gear. They orbit the sun equipment while rolling around the band gear. The effect is low acceleration, high torque result rotation.
Maintaining the Planetary Gearbox
On your final drive electric motor, the planetary gearbox requires gear oil, also called equipment lube. It is vital to check the gear oil amounts about every 100 hours and change the gear oil one per year. In the event that you don’t alter out your gear essential oil, you’ll end up with a solid sludge that will lead to excessive use of your planetary equipment system. At Texas Last Drive, we make reference to that as “pudding.”
Another key aspect of maintaining your planetary gearbox is definitely fixing any leaking seals right away. If a seal is definitely degraded enough to allow 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 proven below.
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 change the gear essential oil and don’t disregard leaks. And don’t forget that pudding and grit are not the thing you need in your gearbox!
The modern and innovative design, the compact construction and the wonderful performance characteristics of the PGR/PGW series of gear units make these especially ideal for traveling rubber tired or tracked self-propelled vehicles.