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Its final drive motor on your mini excavator or skid steer loader compact track loader or tractor is an amazing piece of technology. In order to fully appreciate it, and to take care of it, fix it or replace it, it's essential to know the role it plays in your machine. If you're using one of the following models another model or final drive, they all operate on the same principle as we've explained below.
Gears, gears, gears
When working with heavy equipment, even the compact excavator type there's plenty happening. In the machines of all kinds The engine is responsible for multiple systems that boost torque at various speeds in various locations, including those of the final drive, the transmission as well as the torque converter or flywheel, the hydraulic motor system or the differential, dependent on the design and function of the machine.
Each of these gearing systems are comprised of a mixture of pinion gears and ring gears, the lubricant for gears or hydraulic fluid and are all linked. The flywheel, torque converter or hydraulic pump transmits power from the engine into the device for transmission. The transmission device supplies energy to the drive and/or the final drive. In the case of an axle-driven model the differential gears change the direction of this power to rotate the axle shafts. In contrast, an excavator final drive has a planetary gearing system that reduces the speed in relation to the power that comes by the hydraulic motor attached to it increasing torque and allowing the machine to perform more work.
The final drive's the sun and planets
A small and compact device that is it's final drive motor is what drives the tracks on this mini excavation. It's actually divided into two parts. The first one comprises the motor for hydraulics this is the side on which the hydraulic hoses connect. It draws energy from the main pump in the machine. The high-pressure flow produced through the pump turns the pistons in a group that rotates on a swash plate within the travel motor hydraulic which is connected to a super-strong shaft that connects to the other part of the final drive, the final drive gearbox. Since it utilizes the planetary gear arrangement that means the final drive gearbox is able to decrease the speed delivered to the shaft. It in turn increases the amount of torque that can be used to turn the hub onto where the track sprocket can be installed. The tracks are engaged of your compact excavator, generating enormous torque, which moves it in the direction you would like to take it. How can something that is so small get to be that big?
It's the configuration of the planetary gear that allows it to be done. When you were in Physics classes, you likely were taught:
Torque = Power / Speed
Also lower speed can increase the torque. A planetary gearing system includes the ring gear, which has the sun gear in its center, and three planetary or pinion gears, that are equal distances away from each other which rotate in the direction of the sun gear. The shaft connecting the hydraulic travel motor with the final drive gearbox turns the sun gear at an extremely fast speed. The planetary gears connect with the sun gear and spin as they move around the gear ring. They rotate at a slower speed that the sun gear and this reduces speed, which increases the torque.
These gearing relations as well as the force they generate is referred to in the form of the final drive ratio. By dividing the number teeth in your rings gear by the number of teeth within your gears planetary, you get this number. In general, a higher final drive ratio will mean greater torque at the tracks, but a slower top speed.
How does it work in the wild
It's incredible how much torque and power the drives produce in relation to their dimensions. Take, for instance, the John Deere 35D mini excavator fitted with two final drive motors that have the total weight of just 170 lbs (77 kg). These motors can move quickly that JD 35D mini-excavator" which weighs 7,672 pounds (3487 kg) by the way aEUR" at speeds as high as 2.8 3 mph (4.5 km/h). The tiny final drive motors are carrying more than 50 times (5000 percent!) the weight of their respective motors at these speeds. They also climb up an incline and with a bucket full of water and the blade digging up dirt! If that's not an amazing feat of human engineering you don't even know what else is. The only natural thing that can come near to this level is the ants that work, and are able to carry 50 times their body weight.
What's more remarkable is that, with regular maintenance the final drive motor can do the job throughout the years. The ants that work on your machine may only last for a couple of weeks! As you could imagine, due to the craftsmanship and engineering that go into these drives that are final and motors, they are quite costly to replace or repair at an end point in their lifespan. This is where we step in. We can help you save tons of cash and get back to work quickly!
In the coming blog posts, we'll discuss aspects on how you can properly take care of the final drive motor and maximize the lifespan of this important, reliable and often overlooked and under-valued part of your mini excavator!
If you're looking to know more about the way these marvels of technology operate or you require assistance in maintaining or repairing an excavator final drive motor, give BN Gears Final Drives a call right now!
The BN Gears family of BN gears Final Drives has provided excellent quality Value, Service, and Quality for more than 50 years, and you can depend on us to provide you with a lifetime of helpful, friendly assistance for all of needs related to your final drive and travel motor requirements. Call us today at +86-750-6318209 6318263 or visit our online store at https://www.bngears.com/ to find and order what you need today for Fast and Free delivery to your door.
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