Pivoting Hook Fastener for Quick Welding Table Clamping
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Solution Overview
Problem
Existing clamping systems for welding tables require complex orientation and adjustment to secure fastening devices, making them impractical and time-consuming.
Innovation Solution
A fastening device with a hooking element that pivots into a table opening, featuring a first wing engaging the edge and a second wing acting as a stop, allowing secure clamping without manual adjustment, and a screw mechanism for simultaneous positioning and tightening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a crossbar fastening system is used to secure devices to a welding table, then the cost of the fastening system is reduced, but the operator must manually orient and maintain the rod orientation while tightening, increasing operational complexity and time
Solution Approach 1:
The hooking element is designed to automatically engage with the opening edge through its own pivoting motion. When the rod is inserted and rotated, the hooking element pivots and its first wing automatically grips the opening edge while the second wing stops against the rear face, securing itself without requiring manual orientation adjustment during tightening
Solution Approach 2:
The hooking element is pre-configured with the first wing extending perpendicular to the rod axis and the second wing protruding from the first wing's plane. This preliminary geometric arrangement ensures that upon insertion and rotation, the wings automatically assume the correct engagement positions relative to the opening edge and rear face
2Reliability
If a ball-bearing clamping mechanism is used, then the fastening device is secure, but the system becomes much more expensive to manufacture
Solution Approach 1:
The patent replaces expensive ball-bearing components with simple, inexpensive metallic wings that perform the same fastening function. The first and second wings are basic geometric features of the hooking element that can be manufactured through standard metal forming processes, eliminating the need for precision ball-bearing assemblies while maintaining adequate fastening security
Solution Approach 2:
The invention extracts the essential fastening function from the complex ball-bearing mechanism and implements it through the simplified hooking element with wings. By removing the ball-bearing component entirely and retaining only the necessary geometric features (first wing for gripping, second wing for stopping), the system achieves reliable fastening at a fraction of the manufacturing cost
3Force
If multiple adjustment steps are required to secure the fastening device, then the clamping force can be optimized, but the operational time and complexity increase
Solution Approach 1:
The patent combines the positioning and clamping actions into a single rotational motion of the rod. As the rod rotates, the hooking element pivots and the first wing simultaneously engages with the opening edge while the second wing stops against the rear face, achieving both positioning and clamping in one continuous motion without separate adjustment steps
Solution Approach 2:
The hooking element is pre-configured with the first wing extending perpendicular to the rod axis and the second wing protruding from the first wing's plane. This preliminary geometric arrangement ensures that upon insertion and rotation, the wings automatically assume the correct engagement positions relative to the opening edge and rear face, eliminating the need for multiple adjustment steps
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
Enables quick, secure attachment and detachment of accessories to a welding table with reduced manual effort, enhancing operational efficiency and ease of use.
Implementation Method 1
The rod and the fastening element being capable of passing through an opening in the table, the fastening element being capable of engaging with the edge of the opening after pivoting, clamping means capable of bearing against the table or the accessory and clamping the fastening element via the rod
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A fastening device for removably fixing an accessory on a work table (1) comprises: - a rod (310) having clamping means (4) adapted to bear against the table or the accessory; - a hooking element (32) linked to a second end (312) of the rod (310) opposite the first end (311), the hooking element (32) having at least one hook (320) projecting radially with respect to the axis of the rod (310), the rod (310) and the hooking element (32) being adapted to pass through an opening (2) in the table (1), the hooking element (32) being adapted to engage with the edge of the opening (2) after pivoting.The hook (320) has a first wing (3201) extending along a plane perpendicular to the axis of the rod (310) and a second wing (3202) projecting from the plane of the first wing (3201), the first wing (3201) being able to engage with the edge of the opening (2) and the second wing (3202) forming a stop against the opening (2) to limit the pivoting of the hooking element (32).