Planetary Gear Drive
Drive type: speed reducer
Output torque: 33,895 Nm (25,000 lb-ft)
Max input speed: 2800 rpm
Selection of input options
Straight set for an upon centerline adaptation providing a symmetrical clearance around the hydraulic motor input
Offset straight in allows the hydraulic engine be mounted off center
Right angle input moves the hydraulic 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 exterior shaft by offering an Planetary Track Drive 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 would depend 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 (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 electric 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, while 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 devices.
Maximum Torque Up to 170,000 Nm
Transmission 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 brief 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 mounting of hydraulic plug-in motors. The careful choice of the components and design allows our monitor drives, CTD and CTU, to be used in the most severe environmental working conditions. Brevini planetary monitor 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 wonderful 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 track drives are specifically created 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 integral multidisc failsafe brake and may be installed on hydraulic motors and so are ready to accept ‘plug-in’ hydraulic motors.
Shaft orientation:
> 10 kNm
high-torque, high load capacity
Other characteristics:
for wheel and monitor drives, compact, rugged, for construction vehicles
This gear shaft final drive comes with LO-HI speed and was created for increased performance. That is extremely useful specifically in wheeled and tracked devices, which feature a considerably different operating/travel acceleration ratio.
Note that that is also the right product for street paving machines, along with construction tools and forestry machines.
Final drive motors are hydraulic motors with a speed reducing, torque multiplying planetary gear established. In this post, we’ll discuss planetary gear models, the parts that produce them up, and how they function.
Planetary Gears and Last 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. Quickness and torque are related by power:
Power = Speed x Torque
That means if you want to enhance torque for a given horsepower, we need to reduce speed:
Torque = Power / Speed
Hence the term “low-speed, high-torque.” One method of reducing acceleration 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 that means they have exceptional torque density. Below you can observe a planetary gear program from a final drive motor.
Planetary gear established from a final drive showing the carrier, ring gear, sun equipment, and planetary gears
Carrier for a set of 3 planetary gears from your final drive
Planetary Gear Systems
In a final drive gear hub, you will most likely 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 held jointly by a carrier, as shown in the image above. As possible plainly see, all three gears are arranged the same distance from each other. At the guts is a location for sun equipment to mesh and offer input to the system.
How Last Drive Planetary Gears Work
Let’s have a simplified look at the way the planetary gears in a final drive work. Input power causes the sun gear to rotate at high swiftness. The planets mesh with both sun gear and the ring gear. They orbit the sun equipment while rolling around the ring gear. The effect is low velocity, high torque result rotation.
Maintaining the Planetary Gearbox
On a final drive engine, the planetary gearbox needs gear oil, also referred to as equipment lube. It is vital to check the apparatus oil amounts about every 100 hours and change the apparatus oil one per year. If you don’t change out your gear essential oil, you’ll end up with a heavy sludge that will result in excessive use of your planetary equipment system. Here at Texas Last Drive, we refer to that as “pudding.”
Another key aspect of keeping your planetary gearbox can be fixing any leaking seals right away. If a seal is certainly degraded enough to permit oil to leak out, then which means dirt and dirt can make their method in. You don’t want your gears look like the gritty mess demonstrated 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. Also keep in mind that pudding and grit are not what you need in your gearbox!
The present day and innovative style, 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.