A trailer caravan connection device

By using a combination of a wrap-around sleeve and a servo-electric push rod in the trailer caravan coupling device, a rigid mechanical engagement lock of the ball joint is achieved, solving the problem of easy slippage and disengagement when manually locked, and improving driving safety.

CN224427005UActive Publication Date: 2026-06-30HENAN AILU AUTOMOBILE MFG CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
HENAN AILU AUTOMOBILE MFG CO LTD
Filing Date
2025-08-28
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

In existing trailer caravan connection devices, the ball joint connection structure relies on manual locking, which is easily affected by manual operation. During driving, road bumps can cause the ball joint to slip or come off, posing a safety hazard.

Method used

The wear-resistant inner wall of the sleeve is used to reduce friction. The servo electric push rod is controlled by PLC and pushes the fixed frame to move along the slide. The limit rod is rigidly connected to the fixed plate. The clamping plate uses the arc surface to clamp the ball head to achieve mechanical engagement and rigid locking. The servo electric push rod controls the locking force in a closed loop.

Benefits of technology

Ensure a secure connection of the ball joint, avoid excessive compression, improve driving safety, and reduce fluctuations in locking force.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN224427005U_ABST
    Figure CN224427005U_ABST
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Abstract

This utility model discloses a towable RV connection device, including a connecting plate and a ball joint. The surface of the connecting plate is provided with a cover sleeve, and the ball joint is located inside the cover sleeve. A groove is formed on the surface of the connecting plate, and a fixing frame is fixedly connected inside the groove. A fixing plate is fixedly connected to the top of the connecting plate, and a limit rod is fixedly connected to the surface of the fixing plate. The limit rod movably passes through the fixing frame, and a locking plate is fixedly connected to the bottom end of the fixing frame. A servo electric push rod on the surface of the fixing frame is synchronously extended under the control of a PLC, pushing the fixing frame to move along the groove of the connecting plate toward the ball joint. At this time, the limit rod passes through the fixing frame and is rigidly connected to the fixing plate, forcing the fixing frame to move linearly along the groove. The locking plate at the bottom end of the fixing frame moves with the fixing frame and engages with the ball joint through arc surface contact. Rigid locking is achieved by mechanical interlocking. The servo electric push rod controls the locking force in a closed loop to ensure a firm fit without excessive compression.
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