What is a planetary drive axle?
Planetary Gearing. On heavy-duty mobile equipment, planetary gears are mounted inside the wheels at the end of the axles. These gears are typically spur type, and consist of a sun gear, planet gears and a ring gear.
How does a planetary gear system work?
As they rotate inside of the ring gear, the planetary gears create pitch circles that can be formed into a gear train that, in turn, is hooked up to input and output shafts. The input shaft will come from the engine and the output shaft will head to the driven wheels.
What are planetary gears in a transmission?
Epicyclic gearing or planetary gearing is a gear system consisting of one or more outer, or planet, gears or pinions, revolving about a central sun gear or sun wheel. Typically, the planet gears are mounted on a movable arm or carrier, which itself may rotate relative to the sun gear.
What is a planetary double reduction drive axle?
Double reduction gear axle. Inboard planetary final drives distribute axle loads evenly to reduce stress on individual gears and shafts. Provides longer life with less service and maintenance worries than outboard planetary systems. Provides wide range of wheel tread settings and easy adjustability.
What causes planetary gear failure?
Faulty design is not only the reason for gearbox failure, manufacturing and material handling can be one. In planetary gearbox, noise is usually no worse, and often better than standard gear-and-pinion reducers. Having smaller gears means a lower pitch line velocity than a comparably rated pinion and gear set.
Why are planetary gears used in automatic transmissions?
The basis of your automatic transmission is what is known as a planetary, or epicycloidal, gear set. This is what allows you to change your car gear ratio without having to engage or disengage a clutch.
What is planetary gear motor?
A planetary gear motor mimics a planetary rotation system, the input shaft drives the central gear, also known as the sun gear, which then turns the surrounding gears, also known as planet gears. They also feature a very compact, low-weight design in their Class.
What is the advantage of hub reduction axle?
One advantage of a hub reduction or planetary drive rear axle is that the input torque gets reduced twice. First in the differential centre and then through the planetary drive wheel ends. Another advantage, especially for trucks like this one that operate out of mines and quarries, is the high ground clearance.
Do planetary gears wear out?
The planetary gear system is key to helping your final drive motor generate the torque needed to move your equipment and transport heavy loads. When it goes out, everything literally comes to a grinding halt. Learn the signs of impending planetary gear failure!
How do you know if planetary gears are bad?
Visual Signs of Planetary Gear Wear
- Worn gear teeth that look more pointed that squared.
- Bent gear teeth.
- Cracking (this starts at the root of the gear teeth where the stress is the highest)
- Surface damage, such as pits, scuffing, or areas that look polished compared to their surroundings.
What is the benefit of planetary gears?
The advantages of planetary gearboxes: High efficiency due to low rolling power. Almost unlimited transmission ratio options due to combination of several planet stages. Suitable as planetary switching gear due to fixing this or that part of the gearbox. Possibility of use as overriding gearbox.
Why do manufacturers use hub reduction units?
Hub reduction reduces the load on the drive- shafts. The tandem axle provides considerable traction without slipping, making for good get-you-there ability and low tyre wear.
What is the purpose of hub reduction?
The hub reduction should relieve stress on the power- train, increase traction force and reduce speed from the increase in tire size. The gears has been developed, with analysis to give the expected life and low weight.
What are Meritor planetary drive axles?
Planetary Axles Meritor planetary drive axles are engineered and manufactured to deliver higher capacity and improved performance across a multitude of heavy-duty off-highway applications.
What are the components of a single speed planetary axle?
AxleTech PRLC 124 W2H and PRLC 144 W2H series double reduction single speed planetary axles feature the following components. An A102 or A104 carrier with a spiral bevel pinion and ring gearset
Why choose AxleTech planetary axles?
AxleTech’s planetary axles are a great fit for a wide range of applications, and can handle any heavy load combination. For off-highway applications, AxleTech offers rigid, tandem, tridem and steer axles, with different gear ratios and axle capacities up to 245,000 pounds.
How much is the maintenance manual for a planetary drive axle?
Planetary Drive Axles Maintenance Manual 9H Models PRLC 124 W2H PRLC 144 W2H PRLC 124 W2H PRLC 144 W2H Issued 07-00 $2.50 Service Notes 1 Service Notes This maintenance manual describes the correct service and repair procedures for all North American AxleTech planetary drive axles.