Oil pump for automatic transmission with double clutches

Abstract

The invention relates to an oil pump for an automatic transmission double clutches. The oil pump comprises a front shell, a rear cover of the oil pump, a drive shaft, an inner rotor gear and an outer rotor gear ring. The bottom of the front shell is provided with an oil absorption opening; a driven gear is arranged at the power input end of the drive shaft, a drive gear is further included; a crescent clapboard is arranged in the front shell; the excircle cambered surface of the crescent clapboard corresponds to the inside gear top of the outer rotor gear ring, and the inner circle cambered surface corresponds to the gear top of the inner rotor gear ring; and three drive pins are uniformly distributed between the circumference of the inner rotor gear and the drive shaft. The oil pump for the automatic transmission with double clutches in the invention is mounted at the front end of the transmission when being used, thereby shortening the axial length of the transmission and meeting the need of whole vehicle miniaturization; the structure of the crescent clapboard is adopted, and the gear difference is two, therefore, the higher efficiency can be achieved; the oil return opening of the oil pump is mounted, so that the redundant oil returns to the oil absorption opening of the oil pump, the oil absorption efficiency is increased, and the generation of the cavitation of oil pump can be prevented and the life of the oil pump is prolonged.

Description

technical field [0001] The invention belongs to the technical field of oil pumps for automatic transmissions of automobiles, in particular to oil pumps for dual-clutch automatic transmissions. Background technique [0002] A typical dual-clutch transmission consists of two coaxial nested or parallel clutches, two coaxial, inner and outer nested input shafts, two parallel output shafts, and multiple synchronous clutches arranged on the output shafts. It consists of a shifter device, multiple shift forks and a differential. The oil pump of the dual-clutch automatic transmission is used as the power source of the hydraulic system to meet the dual-clutch automatic transmission dual-clutch hydraulic control oil, the hydraulic oil of the shift actuator, the hydraulic oil of the hydraulic module, as well as the gearbox gear and clutch. Cooling and lubricating oil for bearings and other components. The existing dual-clutch automatic transmission oil pump has the following defects:...

AI Technical Summary

Problems solved by technology

The existing dual-clutch automatic transmission oil pump has the following defects: 1. The oil pump is arranged at the rear end of the gearbox, which increases the axial length of the gearbox

2. The oil pump is driven by a slender shaft with a length of 330mm and a diameter of 10mm. It is difficult to process and requires a relatively high straightness. Otherwise, the pump shaft rotates at a high speed and the swing is too large, resulting in a large oil pump. Loud noise, even lead to early failure of the oil pump

3. The number of teeth of the oil pump has a tooth difference of 1, and there is no crescent-shaped partition in the pump cavity, and the volumetric efficiency of the oil pump is relatively low at high speed and high pressure

4. Other automatic transmission oil pumps have no oil return port, and the excess flow of the hydraulic system can only be returned to the oil pan

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