Hub reduction gear of two-stage planet carrier double-coupling structure

Abstract

The invention discloses a hub reduction gear of a two-stage planet carrier double-coupling structure, and belongs to the technical field of reduction gears. The hub reduction gear comprises a rack and a hub, wherein a first-stage sun wheel shaft penetrates through a shaft hole of the rack, and the outer end of the first-stage sun wheel shaft is connected with the hub through a planetary gear train; the planetary gear train comprises a first-stage planet carrier, a first-stage inner gear ring, a first-stage gear ring support, a second-stage sun gear, a second-stage planet carrier and a second-stage inner gear ring; and the first-stage planet carrier and the second-stage planet carrier are fixedly connected with the hub through torque tubes. The two stages of planet gears of the hub reduction gear can revolve, the planet gears are sequentially immersed in lubricating oil liquid in the revolution process, sufficient lubrication can be realized, thus the abrasion problem caused by long-time high-speed rotation and collision of the gears is solved, and the reliability of a mining dump truck is guaranteed; and an inner gear ring is improved into the combined structure of the first-stage inner gear ring and the second-stage inner gear ring, only the abraded gear ring needs to be replaced, and therefore, the replacement cost is reduced.

Description

technical field [0001] The invention relates to the technical field of reducers, in particular to a wheel-side reducer with a double-coupling structure of a two-stage planet carrier. Background technique [0002] Mining dump trucks are one of the most important key equipment in the transportation process of open-pit mines, and they are widely used in coal mines, iron mines and other mining environments. Mining dump trucks can generally be divided into two categories according to the transmission mode: mechanical transmission and electric transmission. With the increase of tonnage, the structure of mining dump trucks using mechanical transmission will become more and more complicated. Therefore, domestic large-tonnage mining dump trucks basically adopt the form of electric transmission. As one of the important components on the electric drive dump truck, the wheel reducer plays an important role, and with the trend of large-scale mining dump trucks, the reliability requireme...

AI Technical Summary

Problems solved by technology

[0004] 1. The planetary gear on one side of the commonly used wheel reducer only rotates itself but does not revolve. The structure is as follows figure 2 As shown, the gear at the upper end of the lubricating oil level can only rely on the rotation of the lower end gear to stir and splash the lubricating oil at the bottom for lubrication. Since the amount of lubricating oil splashed on the upper end gear is less, the quality of lubrication is poor and the gear wear The speed is faster, correspondingly, the service life of the wheel reducer is greatly reduced;

[0005] 2. Since the inner ring gear is integral and meshes with the first-stage planetary gear and the second-stage planetary gear at the same time, when the inner ring gear wears out, the entire inner ring gear needs to be disassembled and reinstalled when replacing it, and the replacement cost is relatively high

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