Automobile Towing Device Winding Shaft Positioning
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Solution Overview
Problem
Existing automatically retractable automobile towing devices face instability due to the winding shaft moving within the towing rope, leading to uneven rope lengths and difficulties in smooth stretching or retraction, which affects towing stability and convenience.
Innovation Solution
An automatically retractable automobile towing device with a hollow housing, coil springs, a winding shaft positioned in the middle of the towing belt, and a limiting mechanism that maintains the winding shaft's position, preventing axial movement and ensuring equal rope lengths on both sides, along with a positioning mechanism to prevent deviation, allowing for smooth extension and retraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the rope passes directly through the spindle for automatic winding, then the winding mechanism is simple, but the spindle moves back and forth causing unstable towing and uneven rope lengths
Solution Approach 1:
A limiting block is introduced as an intermediary component between the rope and the spindle. The limiting block engages with the groove on the spindle to prevent axial movement of the spindle, while allowing the rope to pass through and be wound. This mediator resolves the contradiction by maintaining spindle position stability without increasing overall mechanism complexity.
Solution Approach 2:
The system is segmented into distinct functional components: the spindle for rotation, the limiting block for position constraint, and the groove for engagement. This segmentation allows each component to perform its specific function independently, ensuring the spindle remains stationary axially while enabling automatic winding operation.
2Ease of operation
If the rope is kept in a tensioned state by the coil spring, then the rope can be automatically stretched or retracted, but it may defect the rope and affect smooth operation
Solution Approach 1:
The limiting block acts as a mediator that guides the rope through a defined path with the groove, preventing direct contact between the tensioned rope and the spindle surface. This reduces friction and prevents rope deflection, allowing smooth automatic stretching and retraction while maintaining reliability.
3Device complexity
If the spindle is not positioned at the middle of the towing belt, then the structure is simpler, but the rope lengths on both sides become unequal affecting towing stability
Solution Approach 1:
The limiting block with its groove serves as a positioning intermediary that ensures the spindle is correctly positioned at the middle of the towing belt. The groove geometry guides the spindle to the center position, maintaining equal rope lengths on both sides without requiring complex additional positioning structures.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enhances the stability and convenience of automobile towing by maintaining consistent rope lengths and preventing deviation, ensuring smooth operation and improved reliability of the towing process.
Implementation Method 1
two coil springs mounted inside the mounting chamber of the housing; the winding shaft... connected to the coil springs
Data Source
AI summary
The present invention discloses an automatically retractable automobile towing device, which comprises a hollow housing (1), two coil springs (2), a winding shaft (3) and a towing belt (4). The housing (1) has a mounting chamber (10) and two first through holes (13). The winding shaft (3) is rotatably assembled in the mounting chamber (10) and can maintain the towing belt (4). The towing belt (4) is able to extend and retract with rotation of the winding shaft (3). The present invention further discloses a limiting mechanism. In the present invention, the stability of automobile towing is improved, the deviation of the towing belt during the retraction process is avoided so that the towing belt is allowed to stretch or retract smoothly.