A rear expansion frame structure of a trailer house

By designing a rear extension rack structure for the trailer caravan, using a fixed tire rack to secure the inner ring of the spare tire and a top tire rack to support the outer ring of the spare tire, the problem of insufficient practicality and stability of existing extension racks is solved, achieving stable fixation of the spare tire and multi-functional use of the extension rack.

CN117565776BActive Publication Date: 2026-05-19WUHAN SAPW AUTOMOBILE TECH
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Patent Information

Application Number
CN202311656012.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-12-01
Publication Date
2026-05-19
Estimated Expiration
2043-12-01

AI Technical Summary

Technical Problem

The existing extension rack can only accommodate a spare tire via the spare tire mounting bracket, which needs to be improved in terms of practicality, and the installation stability of the spare tire is relatively poor.

Method used

Design a rear extension rack structure for a trailer caravan, including a mounting frame, a fixed tire frame, and a top tire frame. The fixed tire frame secures the inner ring of the spare tire through a fixing part, and the top tire frame supports the outer ring of the spare tire through a top tire part. The distance between the top tire part and the storage rack is adjustable. The storage rack is used to load materials, improving stability and practicality.

Benefits of technology

It achieves stable fixation of the spare tire, avoiding interference with the vehicle body, can support spare tires of different outer diameters, enhances the practicality of the extension rack, and separates the material rack from the spare tire to prevent materials from damaging the spare tire and ensure safety performance.

✦ Generated by Eureka AI based on patent content.

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    Figure CN117565776B_ABST
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Abstract

The present application relates to a kind of trailer house rear extension frame structure, including hanger, tire rack and material rack;Hanger includes the installation frame and the storage rack connected;Tire rack includes fixed tire rack and top tire rack, fixed tire rack and top tire rack are installed at the storage rack with interval, fixed tire rack is equipped with fixed part, fixed part is arranged with interval between storage rack, top tire rack is equipped with top tire part, top tire part is arranged with interval at the side of fixed part close to storage rack, and the distance between it and storage rack is adjustable;Material rack is installed in storage rack, and is located at the side of fixed tire rack away from top tire rack.This scheme improves the stability of spare tire installation;And top tire part can support different outer diameter of spare tire, improve practicality.And, in this scheme, material rack is also provided at the side of fixed tire rack away from top tire rack, material rack can load material such as bicycle, improve the practicality of extension frame;And since material rack and spare tire are located on the opposite sides of fixed tire rack, can avoid the load on material rack accidentally damage spare tire, ensure safety performance.
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