A planetary gear train bearing lubrication structure

Abstract

The invention provides a planetary gear train bearing lubricating structure. A planetary gear train comprises a planet carrier, a plurality of planetary gears installed on the planet carrier through planetary gear shafts, and a bearing arranged between the planetary gears and the planetary gear shafts. The planetary gear train bearing lubricating structure comprises axial holes, at least one through hole, oil collecting plates and an oil pool, wherein the axial holes are distributed in the axial direction of the planetary gear shafts; the through holes extend from the axial holes to the diametric planes of the planetary gear shafts; at least one ends of the planetary gear shafts are provided with the oil collecting plates, the oil collecting plates are installed on the planet carrier, thepositions, opposite to the axial holes of the ends of the planetary gear shafts, of the oil collecting plates are provided with oil collecting grooves correspondingly, the opening direction of the oilcollecting tanks is consistent with the rotating direction of the planet carrier, and the oil collecting tank, the axial holes and the through holes form oil way channels for allowing lubricating oilto circulate; and the oil pool is located in a shell of the planetary gear train. The oil collecting plates rotate, when the oil collecting grooves rotate and pass through the oil pool, the lubricating oil is collected and conveyed to the outside of the planetary gear shafts through the oil way channels.

Description

technical field [0001] The invention relates to the technical field of planetary gear trains, in particular to a bearing lubrication structure for planetary gear trains. Background technique [0002] As a gear transmission mechanism with many advantages such as small size, light weight, high load capacity, high power density, and coaxial output, the planetary row (planetary gear train) is often used in reduction boxes and gearboxes, but compared with fixed shaft gears Transmission, its lubrication conditions are usually poor. When the planetary row is applied in a traditional automobile, the rotation speed of each rotating part is not high, and the oil bath splash lubrication can basically meet the requirements of use; but when it is applied in a pure electric drive system, it is difficult to ensure that the rotation speed of each rotating part is high due to the high input speed. It is the planetary gear bearings that are fully lubricated and dissipated. [0003] At prese...

AI Technical Summary

Problems solved by technology

Since the planetary carrier is often used as a power output component, it is also difficult for the pressure oil output by the oil pump to enter the high-speed rotating planetary carrier. It is necessary to add a sealing ring or a sealing ring to input the oil from the fixed part to the rotating part. The structure, the cost higher

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