Plastic package motor with anti-loose end cover

Abstract

The invention discloses a plastic package motor with an anti-loose end cover, comprising a plastic package stator, a plastic package motor end cover and a connection fastener; the plastic package stator comprises a plastic package shell body and a motor part installed in the plastic package shell body; a fixing hole is arranged on the plastic package motor end cover; the connection fastener penetrates the fixing hole to fix the plastic package motor end cover at the end part of the plastic package shell body. According to the invention, the plastic package stator and the plastic package motor end cover are connected together through the connection fastener; the assembly firmness and reliability between the plastic package stator and the plastic package motor end cover are improved; the mechanical property and the stable operation of the plastic package motor are ensured; and the risk that the end cover falls off after long term operation of the motor because the tolerance of the assembly size of the end cover is instable is avoided.

Description

technical field [0001] The invention relates to a plastic-sealed motor, in particular to a plastic-sealed motor with a loose end cover, which belongs to the technical field of motor manufacturing. Background technique [0002] The plastic-encapsulated motor is a motor in which the stator core and winding of the motor are packaged with engineering plastics (such as BMC) using plastic packaging technology. At the open end, the bonding force between the end cover and the plastic-sealed stator shell needs to meet certain requirements (such as ≥1000N) to meet the performance index requirements of motor vibration, thermal shock or long-term operation. If the end cover and the plastic seal If the assembly bonding force between the stator housings cannot meet the requirements, the end cover may become loose during use. [0003] In the prior art, the rear end cover of the motor and the plastic-sealed stator case are integrated by injection molding, and the combination of the front-e...

AI Technical Summary

Problems solved by technology

[0004] On the one hand, since the front end cover is generally manufactured by stretching process, the assembly dimension tolerance is unstable. After the motor is assembled, it is difficult to reliably guarantee the static tension between the end cover and the plastic stator casing, especially when the motor is used for a long time. After operation, there is often a hidden danger of the end cover being loose; on the other hand, because the end cover and the plastic-sealed stator shell are connected by interference fit, it is difficult to disassemble the machine during maintenance. After disassembly, the plastic-sealed motor is often scrapped, resulting in Rework is not possible, leading to higher production costs

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