Micromotor shell of automobile

Abstract

The invention discloses a micromotor shell of an automobile. The micromotor shell comprises an enclosure and an end cover, wherein the enclosure is provided with an enclosure bearing chamber, a first fixed part is arranged at an axial outer end part of the enclosure bearing chamber and is used for fixing an axial end part of a bearing, a first through hole is formed in the first fixed part and is used for a motor shaft to extend out, first punching grooves which are axially sunken inwards are formed in transition regions between cylinder bottom axial outer wall surfaces of a cylinder bottom and first axial outer wall surfaces of the enclosure bearing chamber, and first protruding ribs are formed on transition regions between the cylinder bottom axial outer wall surfaces of the cylinder bottom and the first axial outer wall surfaces of the enclosure bearing chamber, are corresponding to the first punching grooves, protrude towards the interior of the enclosure and are used for prolonging an axial effective length of the enclosure bearing chamber. By the micromotor shell, the axial matching length between the enclosure and the bearing assembled in the end cover can be ensured, the perpendicularity requirement of the enclosure, the fixed part on the end cover and a rotation center of the bearing chamber are ensured, and the bearing is prevented from loosening with the enclosure to generate noise and affect normal rotation of the motor.

Description

technical field [0001] The invention relates to an automobile micro-motor casing. Background technique [0002] At present, more and more micro-motors are used in existing passenger cars, such as: the adjustment of the front and rear positions of the car seat, the angle adjustment of the backrest and the seat, the drive of the water spray pump when cleaning the car glass, and the rearview mirror of the car. The direction adjustment, the direction adjustment of the headlights of the car, etc., the performance and safety requirements of the car are getting higher and higher, and when the existing micro-motor is manufactured, most of its shell is machined and formed or a combination of several parts It is realized by forming, the manufacturing cost is high, the processing efficiency is low, and the bearing chamber at the end of the casing is difficult to meet the coaxiality requirement with the positioning center axis of the entire casing, because the fixed part used for bearin...

AI Technical Summary

Problems solved by technology

[0002] At present, more and more micro-motors are used in existing passenger cars, such as: the adjustment of the front and rear positions of the car seat, the angle adjustment of the backrest and the seat, the drive of the water spray pump when cleaning the car glass, and the rearview mirror of the car. The direction adjustment, the direction adjustment of the headlights of the car, etc., the performance and safety requirements of the car are getting higher and higher, and when the existing micro-motor is manufactured, most of its shell is machined and formed or a combination of several parts It is realized by forming, the manufacturing cost is high, the processing efficiency is low, and the bearing chamber at the end of the casing is difficult to meet the coaxiality requirement with the positioning center axis of the entire casing, because the fixed part used for bearing fixing has a vertical axis of rotation of the bearing Requirements, machining must be performed at the bottom of the bearing chamber to ensure the tool retraction process, which greatly reduces the axial fit length of the bearing chamber, therefore, due to the characteristics of machining, it is difficult to ensure the axial fit length of the bearing , and ensure the verticality between the fixed part and the center of rotation of the bearing chamber; for the same reason, the bearing chamber at the end of the end cover is also difficult to meet the coaxiality requirements of the positioning center axis of the entire end cover, because the fixed part has a vertical bearing rotation According to the requirements of the axis, machining must be performed at the bottom of the bearing chamber to ensure the tool retraction process, which greatly reduces the axial matching length of the bearing chamber. Therefore, due to the characteristics of machining, it is difficult to ensure the axial direction of the bearing. The matching length ensures the verticality between the fixed part and the center of rotation of the bearing chamber. However, with the bumps of the road, the vibration of the body and the long-term rotation of the car during driving, if there is no axial fit between the end cover and the casing If the length and the perpendicularity between the axial positioning part of the end of the bearing and the center of rotation of the bearing chamber are guaranteed, the bearing will loosen with the casing, causing noise, and some even loose and fall off the bearing, which seriously affects the normal operation of the motor. operation, there is a serious safety hazard

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