Double-stage oil cylinder synchronous driving three-section sleeve operating bed lifting mechanism

By using a two-stage hydraulic cylinder to synchronously drive a three-section sleeve structure, the problems of operating table guidance stability and gap adjustment are solved, achieving a lifting function with high stability and large stroke, and reducing maintenance costs and system complexity.

CN122276629APending Publication Date: 2026-06-26HARBIN JINMAIWEI TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HARBIN JINMAIWEI TECHNOLOGY CO LTD
Filing Date
2026-05-13
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing operating table lifting mechanisms suffer from poor guiding stability, unadjustable clearance, and a contradiction between stroke and retracted height, making it difficult to meet the diverse and high-precision clinical needs.

Method used

It adopts a two-stage hydraulic cylinder synchronous drive three-section sleeve structure, and achieves gapless sliding through four-sided fitting guide plates and adjusting bolts, eliminating vulnerable parts and adopting a synchronous drive method to eliminate complex position closed-loop control.

Benefits of technology

It significantly improves the guiding stability and synchronization accuracy of the operating table, reduces maintenance costs and wear risks, adapts to diverse surgical environments, expands the lifting stroke, and reduces the difficulty of system development.

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Abstract

A lifting mechanism for a three-section sleeve operating table with synchronous drive of a two-stage hydraulic cylinder. Currently, mainstream mechanisms generally adopt a single-stage hydraulic cylinder and a two-section sleeve structure, which has revealed defects such as poor guiding stability, obvious shaking, inability to accurately adjust the sleeve fitting clearance, and high maintenance costs in long-term use. The present invention comprises: a base (1), a first-stage sleeve (2), a second-stage sleeve (3), a third-stage sleeve (4), a first lifting hydraulic cylinder (6), and a second lifting hydraulic cylinder (10); the first-stage sleeve (2) is fixed on the base (1) and is the innermost sleeve; the second-stage sleeve (3) is nested and slidably disposed outside the first-stage sleeve (2); the third-stage sleeve (4) is nested and slidably disposed outside the second-stage sleeve (3); the first-stage sleeve (2), the second-stage sleeve (3), and the third-stage sleeve (4) are respectively provided with grooves (12), and multiple sets of guide plates (7) are installed in the grooves respectively. The guide plates are evenly arranged along the circumference of the sleeve, and the guide plates are filled with grease. The guide plates (7) are fixed to the pressure plate (8) by bolts. The first and second lifting cylinders are configured to operate synchronously in the hydraulic circuit, causing the second and third stage sleeves to extend or retract synchronously. This invention relates to a two-stage cylinder synchronously driven lifting mechanism for a three-section sleeve operating table.
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