Compact Locking Device with Vertical Pivot Two-Link Mechanism
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Solution Overview
Problem
Existing closure devices for convertible vehicle tops require a large amount of installation space in the vertical direction due to their kinematics, and there is a need for a more reliable and compact design.
Innovation Solution
The use of a two-link mechanism with a drive link and an actuating drive, where the links pivot about vertical axes, allowing for a compact design and high force transmission, combined with a crank drive or motor and gear system for efficient power transmission, and a sensor system for precise position detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If horizontal pivot axes are used in the four-bar linkages, then the locking device can achieve the required kinematic motion, but it requires a large amount of installation space in the vertical direction
Solution Approach 1:
The patent changes the orientation of pivot axes from horizontal to vertical, effectively rotating the kinematic mechanism by 90 degrees. This dimensional reorientation allows the same kinematic function to be achieved while minimizing vertical space occupation, as the mechanism now extends primarily in the horizontal plane rather than vertically
2Volume of moving object
If a two-link mechanism with vertical pivot axes is used, then the vertical installation space is reduced, but the device complexity increases
Solution Approach 1:
The mechanism is divided into distinct functional segments: a two-link mechanism for primary motion transmission and a coupling device for coordinate transformation. This segmentation allows each component to be optimized independently and simplifies the overall design by clearly defining functional boundaries between components
3Adaptability or versatility
If the locking hook is designed to be adjustable in the longitudinal direction, then the adaptability to different positions is improved, but the device complexity increases
Solution Approach 1:
The coupling device serves multiple functions simultaneously: it connects the two-link mechanism to the locking hook, enables longitudinal adjustment of the locking hook, and provides pivot motion. This multi-functionality reduces the need for separate adjustment mechanisms, thereby limiting the increase in device complexity while maintaining high adaptability
Data Source
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AI summary
The locking device (1) comprises a locking hook (2) with a grip (3) at the front, and a bearing (4) at the back. A housing (5) is provided, in which the bearing is adjustably mounted in longitudinal direction of the locking hook. A drive unit (7) is provided, which comprises a two-link mechanism (8), a drive link (10), which is connected to the two-link mechanism, and an actuator (11) for driving the drive link.