Planetary gear shift mechanism

Abstract

The invention relates to a planetary gear shift mechanism. An input shaft is connected with a common clutch cylinder through a drive hub. A first clutch is connected with a first shaft. Two sides of the first shaft are supported on the input shaft and a third planet carrier respectively. The first shaft is connected with a common sun gear for a second planet row and a third planet row. A second shaft connected with a second clutch is connected with a second planet carrier through the first shaft. The second planet carrier is respectively connected with a first gear ring row and a third gear ring row. Two ends of a front brake component are connected with a first brake and a first sun gear respectively. A first planet carrier is connected with a second gear ring row of the second planet row. A fourth sun gear is sleeved on an output shaft of the third planet carrier idly. Two ends of a rear connector are connected with the third gear ring row and a fourth sun gear respectively. A fourth planet carrier is connected to an output shaft of the third planet carrier connected with an output disk. The planetary gear shift mechanism is reasonable in layout, compact and simple in structure and convenient to operate and has six forward gears and one reverse gear.

Description

technical field [0001] The invention relates to a planetary gear transmission mechanism, which belongs to the technical field of hydraulic automatic transmissions. Background technique [0002] At present, the hydraulic automatic transmission used for vehicles is composed of a hydraulic torque converter, a planetary gear transmission mechanism and an automatic control system to meet the vehicle gear requirements. Most of the current multi-gear planetary gear transmissions adopt four forward gears and one reverse gear structure, such as the Simpson type planetary gear mechanism and the Lavignell type planetary gear mechanism. If the forward gear is to be increased, the number of planetary rows of the planetary gearbox and the clutches and brakes matched with each planetary row will be more. At present, most planetary gear transmissions with six gears are arranged with four sets of planetary rows, more than three clutches and multiple brakes. However, the structure of the abo...

AI Technical Summary

Problems solved by technology

At present, most planetary gear transmissions with six gears are arranged with four sets of planetary rows, more than three clutches and multiple brakes, but the above-mentioned planetary gear transmissions have complex structures, so the manufacturing cost is high, and the clutches and brakes need to be operated at the same time when shifting gears , complex manipulation

Furthermore, since the gears of each planetary row adopt a helical tooth structure, the stress is complicated, which may easily cause early damage to the bearing, and the manufacturing cost is high.

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