What are the operating factors of planetary gears and side gears in the main reducer assembly

Update:24-12-2021
Summary:

The planetary gears and side gears in the main reducer […]

The planetary gears and side gears in the main reducer assembly are composed of 4 planetary gears, 2 side gears and their gaskets and cross shafts. They are installed in the differential case.
Usually when the vehicle is driving in a straight line, it will run with the differential case, but when the vehicle is turning or encountering other road conditions when the speed of the left and right wheels is inconsistent, its role is great. The four planetary gears The left and right sides of each are meshed with a straight-tooth cone half-shaft gear. The axle journals of the half shaft gears are supported in the corresponding holes on the left and right sides of the differential case, and the inner splines are connected with the half shafts. The planetary gear that rotates together with the differential case (revolution) toggles the rotation of the half-shaft gears on both sides. When the resistance on the wheels on both sides is different, the planetary gear rotates on its own axis--rotation to realize the alignment of the wheels on both sides. Differential drive. The back of the planetary gear and the inner surface of the corresponding position of the differential case are all made into spherical surfaces, which can increase the length of the shaft hole of the planetary gear and facilitate the correct meshing with the two half shaft gears. It allows the slower wheel to travel slowly and the faster wheel to travel fast to ensure the normal driving of the vehicle.

Planetary gears and half-shaft gears relied on the teeth on the inclined surface to mesh with each other, so the consistency of each tooth must be strictly controlled during the machining process, and a certain amount of gear installed in the differential housing must also be ensured The clearance (the clearance value must be operated strictly in accordance with the process requirements of each manufacturer), so as to ensure that the planetary gears and half-shaft gears will not be stuck or broken during operation.

The force on planetary gears and half-shaft gears mainly comes from the half-shafts. The bearing capacity and violent impact on the half-shafts will directly affect the service life of planetary gears and half-shaft gears, so special attention should be paid to the vehicle’s life. Carrying and high-speed, high-end, heavy-throttle starting matters, if you don’t pay attention, it will cause damage to the planetary gears and side gears.

In terms of lubrication, the lubrication of the planetary gears and side gears is carried out together with the final drive. In order to allow lubricating oil to enter the planetary gears and side gears, windows are often opened on the differential housing. It also ensures that the lubricating oil can smoothly reach between the planetary gear and the planetary gear shaft journal. A plane is milled on the planetary gear shaft journal, and radial oil holes are drilled between the planetary gear teeth. Therefore, no matter what the situation is, it is necessary to check and ensure that there is enough lubricating oil in the final drive assembly to ensure that the planetary gears and side gears are well lubricated without damage.

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