Hand-Held Rivet Nut Tool Replaceable Mandrel-Driving Device
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Solution Overview
Problem
Existing hand-held rivet nut tools with replaceable mandrel-driving devices lack a secure and stable connection for the rotational mandrel-driving assembly, limiting their use in narrow working spaces and requiring different tools for various applications.
Innovation Solution
A hand-held rivet nut tool design featuring a detachable push-and-pull or rotational mandrel-driving device with a secure mounting system, allowing for interchangeable mandrel-driving assemblies to accommodate different working spaces and user preferences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a push-and-pull mandrel-driving device is used, then the user can easily and quickly rotate the spiral pushing rod to screw the external threaded shaft into or out of the rivet nut, but the device cannot be used in narrow working spaces where the spiral pushing rod cannot completely extend
Solution Approach 1:
The mandrel-driving device is segmented into separate functional components: the mounting tube with external thread, the internal thread on the driven member, and the mandrel assembly. This segmentation allows different driving mechanisms (push-and-pull or rotational) to be interchanged on the same tool body, enabling adaptation to different working space constraints while maintaining ease of operation for each specific application
2Stability of the object's composition
If the mandrel-driving device is mounted securely on the body, then the connection is stable, but the device cannot be adjusted according to different working spaces
Solution Approach 1:
The mounting system transitions from a fixed, static connection to a dynamic, interchangeable connection. The threaded mounting tube on the driven member allows different mandrel-driving devices to be securely mounted or removed as needed, providing both stability during operation and adaptability for different working conditions through simple device replacement
3Adaptability or versatility
If different types of rivet nut tools are used for different working spaces, then each tool is optimized for its specific application, but the user requires multiple tools and increased complexity
Solution Approach 1:
The driven member is designed with universal mounting features (external thread and mounting tube) that can accommodate multiple types of mandrel-driving devices. This universality allows a single tool body to perform multiple functions by simply interchanging the mandrel-driving device, eliminating the need for multiple specialized tools while maintaining optimization for different working spaces
Data Source
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AI summary
A hand-held rivet nut (rivet bolt) tool has a body (10) having a base (11); two handles (12) connected pivotally to the base (11); two pairs of links (13) connected pivotally and respectively to the handles (12); a driven member (14) connected pivotally to the pairs of the links (13); a mandrel (15) mounted rotatably through the driven member (14) and the base (11). A push-and-pull mandrel-driving device (20) or a rotational mandrel-driving device (30) is mounted detachably and hence replaceably on the driven member (14), is capable of driving the mandrel (15), the bushing (16) and the threaded shaft (17, 17A). A user is allowed to choose either the push-and-pull mandrel-driving device (20) or the rotational mandrel-driving device (30) according to different working spaces or personal practices.