Isolation guard, isolation guard structure and hydraulic gear box drive

By installing an isolation and protective component at the connection between the motor and the hydraulic gearbox, the problem of hydraulic oil entering the motor is solved, thus achieving safe operation and extended lifespan of the motor, and improving sealing performance and durability.

CN224503042UActive Publication Date: 2026-07-14SIEMENS STANDARD MOTORS LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SIEMENS STANDARD MOTORS LTD
Filing Date
2025-06-27
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

Existing technology cannot effectively prevent hydraulic oil in the hydraulic gearbox from entering the motor through the oil seal gap under high pressure, which can lead to motor damage.

Method used

An isolation and protective component is installed at the connection between the motor and the hydraulic gearbox, including a cylindrical retaining ring and an isolation part extending radially outward from the retaining ring, an umbrella-shaped discrete part and a radial extension part, which are added to the outside of the oil seal to block and disperse splashed hydraulic oil. The retaining ring is interference-fitted with the rotating shaft and coated with sealing material to close the gap.

Benefits of technology

It effectively prevents hydraulic oil from entering the motor, improves sealing performance, extends the life of motor bearings, enhances the motor's waterproof performance and durability, and reduces costs.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224503042U_ABST
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Abstract

The utility model provides a kind of isolation protection piece, for being arranged at the connecting place of motor and hydraulic gear box of hydraulic gear box driving device, comprising: cylindrical fixed ring, it is configured to be tightly fitted on the rotating shaft of motor, and there is the first end portion towards motor and the second end portion towards hydraulic gear box;And isolation part, it is arranged around fixed ring, and it extends radially outward from the first end portion or the second end portion of fixed ring, especially, isolation part includes the umbrella-like discrete part that the outermost side of isolation protection piece is obliquely extended towards first end portion.It also provides a kind of isolation protection structure with the isolation protection piece, and the hydraulic gear box driving device comprising the isolation protection structure.Through providing this new isolation protection scheme, effectively solve the problem that hydraulic oil in hydraulic gear box driving device intrudes into motor interior under high pressure condition through oil seal gap, while simplifying structure, improve the sealing performance and durability of equipment, reduce cost.
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