Zero-tooth-difference-output secondary transmission part structure of automobile seat lifting motor

Abstract

The invention discloses a zero tooth difference output secondary transmission part structure of an automobile seat lifting motor, which comprises a cover plate, an output gear assembly, a planet wheel assembly, a helical gear, a box bottom gasket and a box body. The output gear assembly comprises an output gear and a center shaft, the output gear is fixedly connected to the lower end of the output gear and is coaxially arranged with the output gear, the lower end of the output gear is provided with an inner ring face. A zero-tooth-difference gear ring is arranged on the lower portion of the inner ring face. The planet wheel assembly comprises a planet wheel, the planet wheel is an integral duplicate gear, and the planet wheel is composed of a small-tooth-difference gear and a zero-tooth-difference gear which are arranged up and down; an eccentric wheel is fixedly arranged on the bevel gear, a bevel gear center hole vertically penetrates through the bevel gear, and the bevel gear center hole vertically penetrates through the eccentric wheel upwards. Transmission parts are all in continuous motion, part of sliding friction is converted into rolling friction through gear and gear ring transmission of the zero-tooth-difference output part, and the mechanical efficiency is greatly improved compared with a sliding block type structure.

Description

Technical field: [0001] The invention relates to a car seat raising motor, in particular to a structure mainly used for reducing gear difference and zero tooth difference output of the secondary transmission part of the car seat raising motor. Background technique: [0002] Existing car seat raising motors require high strength and high output torque requirements. In order to ensure the stability of the seat position, the reliability requirements for reverse self-locking are high. The lifting motor is a two-stage transmission, and the first-stage transmission is a worm and helical gear pair; the two-stage transmission mainly has two forms at present, one is the ordinary NGW planetary gear transmission; the other is the small-tooth-difference transmission. [0003] Ordinary NGW type planetary gear motor has high mechanical efficiency of the secondary transmission part, so the overall mechanical efficiency of the motor is high, but this kind of motor cannot self-lock because o...

AI Technical Summary

Problems solved by technology

Since the first-stage transmission part does not need to be self-locking, the helix angle of the worm and helical gear pairs can be increased to improve mechanical efficiency, but the efficiency of the first-stage transmission is still far from being able to compensate for the loss of the low-efficiency secondary transmission part.

[0005] It can be seen that the high efficiency of ordinary NGW planetary gear motors is at the expense of the reliability of self-locking, and the defect of unreliable self-locking in terms of its structure cannot be solved.

However, the slider motor with less tooth difference has very low mechanical efficiency, and it is obviously not an ideal structure.

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