Spare Tire Mounting Structure Anti-Theft Mechanism
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Solution Overview
Problem
Conventional spare tire mounting systems for vehicles expose the shaft bolt, making it vulnerable to external operation and leading to frequent theft, especially after vehicle delivery.
Innovation Solution
A structure featuring a carrier support bracket with a shaft bolt and socket system, where the socket is designed to transmit torque during manufacturing but blocks external rotation post-delivery, preventing theft by ensuring the shaft bolt cannot be rotated from outside the vehicle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the lower end portion of the shaft bolt is exposed to the outside of the vehicle for easy mounting during manufacturing, then the ease of operation is improved, but the reliability deteriorates due to vulnerability to theft and external operation
Solution Approach 1:
The shaft bolt is segmented into two functional portions: an upper exposed portion for operation during manufacturing and a lower hidden portion that remains inside the vehicle body. This segmentation allows the upper part to be accessible for mounting while the lower critical part is protected from external access, thereby resolving the contradiction between ease of operation and security against theft
Solution Approach 2:
A through-hole structure is introduced as an intermediary mechanism. The through-hole allows the shaft bolt to pass through the vehicle body, creating a pathway that enables both easy access during manufacturing and secure positioning after assembly, thus mediating between the conflicting requirements of accessibility and security
2Ease of operation
If the shaft bolt is exposed externally to allow easy mounting, then the ease of operation is improved, but the device complexity increases due to additional security measures required
Solution Approach 1:
The shaft bolt is designed with multi-functionality: it serves both as a mounting mechanism during manufacturing (when exposed) and as a secured fastening element after assembly (when positioned through the through-hole). This universal design eliminates the need for separate security devices, reducing overall device complexity while maintaining ease of operation
Solution Approach 2:
Instead of making the bolt fully exposed or fully hidden, the invention inverts the conventional approach by having the bolt pass through the vehicle body. This inversion allows the bolt to be accessible during manufacturing but concealed and secured after assembly, achieving both ease of operation and simplicity of structure
Data Source
AI summary
A structure for mounting a spare tire for antitheft may include a carrier support bracket on which a spare tire is mounted, a bracket mounted at a bottom surface of a vehicle and supporting the spare tire, and a carrier winding or unwinding a wire mounted at the carrier support bracket in order for the spare tire to be moved upwardly and downwardly, the carrier further including a carrier housing including a top surface formed with a through hole, and a bottom surface formed with a projecting hole, a shaft bolt rotatably mounted at the carrier housing and adapted to wind or unwind the wire by rotation thereof, and a socket to transmit a torque applied from an outside of the vehicle to the shaft bolt or to block the torque not to be transmitted to the shaft bolt.