Oil return structure, device

By designing a combination of an oil-throwing structure and a negative pressure structure, and utilizing the rotation of a reverse oil-throwing ring and a negative pressure double impeller, the problem of oil leakage in oil-cooled motors is solved, oil recycling is achieved, and the service life and reliability of the motor are improved.

CN120979079BActive Publication Date: 2026-07-10SUZHOU LEGO MOTORS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SUZHOU LEGO MOTORS CO LTD
Filing Date
2025-08-14
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

Existing oil-cooled motors suffer from problems such as accelerated oil leakage, inability to achieve oil return, and wear of the oil seals, which easily lead to oil leakage, affecting the service life and reliability of the motor.

Method used

Design an oil return structure, including an oil-throwing structure and a negative pressure structure. Through the cooperation of a reverse oil-throwing ring and a negative pressure double impeller, the oil can be recycled. The design of the oil-throwing section and the negative pressure section uses a rotating shaft to drive the reverse oil-throwing ring and the negative pressure double impeller to rotate, forming a negative pressure path to ensure that the oil flows back into the inner oil cavity and avoids oil backflow.

Benefits of technology

It effectively solves the oil leakage problem when oil-cooled motors and gearboxes are used together, improves the service life and reliability of the motor, realizes the recycling of oil, and enhances the sealing performance and reliability of the system.

✦ Generated by Eureka AI based on patent content.

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    Figure CN120979079B_ABST
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Abstract

An oil return structure and device for oil return of a motor and / or gearbox, the motor and / or gearbox each having a casing and a rotating shaft, the casing having an inner oil cavity therein, the inner oil cavity having a first oil level surface thereon, and the rotating shaft being provided with an oil seal body for sealing an opening of the inner oil cavity, the oil return structure comprising: a negative pressure section and an oil throwing section provided on the rotating shaft, an oil throwing structure provided on the casing and corresponding to the oil throwing section, and a negative pressure structure provided on the casing and corresponding to the negative pressure section. The present scheme can effectively solve the problems of insufficient cooling caused by oil seal wear and oil leakage of an oil-cooled motor, and damage to the insulation system caused by oil entering the motor when the motor and the gearbox are matched, thereby improving the service life and stability of the motor.
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