Rigid-flexible switching type four-door hinge mounting tool and method based on pneumatic sequential logic

By using a pneumatic timing logic-based rigid-flexible switching four-door hinge installation fixture, the contradiction between rigidity and flexibility during the positioning and tightening process of the fixture is resolved through three-dimensional decoupling and a pneumatic control system. This achieves an efficient and reliable assembly process, reducing equipment complexity and cost.

CN121848073APending Publication Date: 2026-04-14CHINA FAW CO LTD
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Patent Information

Application Number
CN202511879851.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-12
Publication Date
2026-04-14

AI Technical Summary

Technical Problem

Existing door hinge installation fixtures present a conflict between rigidity and flexibility during positioning and tightening. Their reliance on electrical sensing and control systems results in complex, costly, and unreliable equipment, which is particularly limited in explosion-proof environments.

Method used

A rigid-flexible switching four-door hinge installation fixture based on pneumatic timing logic is adopted. Through a three-dimensional decoupling mechanism, a normally closed self-resetting mechanism, and a normally open hysteresis locking mechanism, combined with a pneumatic control system, the fixture can switch between flexibility and rigidity at different operating stages. The state transition of the fixture is controlled by pneumatic timing logic.

Benefits of technology

It enables efficient switching of the fixture during the pushing, positioning and tightening stages, reduces equipment costs, improves operational flexibility and installation accuracy, avoids quality accidents caused by timing disorder, and ensures the integrity of the vehicle body positioning holes.

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Abstract

The invention discloses a rigid-flexible switching type four-door hinge installation tool and method based on pneumatic sequential logic, and relates to the technical field of automobile manufacturing equipment, and the rigid-flexible switching type four-door hinge installation tool comprises a positioning and clamping operation module, a ground pushing chassis module and a pneumatic sequential logic floating module. The floating module comprises a three-dimensional decoupling mechanism, a normally-closed self-resetting mechanism and a normally-open delaying locking mechanism. The pneumatic control system is provided with three parallel branches including a reset unlocking branch, a clamping operation branch and a delay locking branch with a one-way sequence valve, and a pure pneumatic logic time sequence is constructed by utilizing the characteristic that an opening threshold value is set between dynamic pressure and stable pressure. By means of the scheme, accurate switching of pushing rigidity, positioning flexibility and tightening rigidity can be automatically achieved only through on-off of a single air source, complex electrical control is abandoned, the rigid and flexible requirement contradiction in follow-up assembly is effectively solved, vehicle body damage caused by time sequence disorder is avoided, and hinge installation accuracy and equipment reliability are improved.
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