Adjustable Clamping Assembly for Workbench Securing
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Solution Overview
Problem
Conventional clamping devices for securing workpieces to workbenches rely on friction, leading to erosive wear of the workbench surface, require cumbersome operation, and are not user-friendly, often causing splitting and limiting the use of less expensive materials.
Innovation Solution
An adjustable clamping assembly with a rigid central rod featuring a linear cylindrical upper section, a tapered lower section, and a bent section, along with a clamping member that uses clutch plates and a non-abrasive cushioning pad to secure workpieces without relying on friction, allowing for easy positioning and secure holding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional clamping devices rely on friction to secure workpieces, then they can hold workpieces effectively, but they cause erosive wear to the workbench surface and require forceful blows for operation
Solution Approach 1:
The patent introduces a bushing as an intermediary component inserted into the doghole to mediate between the clamping device's post and the workbench surface. This bushing eliminates direct frictional contact between the post and the workbench, preventing erosive wear while maintaining the frictional grip needed for secure holding. The bushing acts as a protective intermediary that preserves the workbench surface.
Solution Approach 2:
The patent replaces the conventional friction-based mechanical securing system with a positive engagement system using a tapered post and matching tapered bushing. Instead of relying on friction from forceful blows, the tapered geometry creates a mechanical lock that secures the clamping device without erosive friction, substituting the mechanical principle of taper-based engagement for friction-based holding.
2Reliability
If conventional clamping devices use a threaded rod extending below the benchtop with a nut, then they can secure workpieces, but they require cumbersome two-handed operation and are time-consuming
Solution Approach 1:
The patent extracts and eliminates the cumbersome threaded rod and nut components from the clamping device. By removing these elements entirely and replacing them with a simplified tapered post system that engages with a matching bushing, the device achieves secure workpiece holding without requiring two-handed operation or time-consuming threading actions.
Solution Approach 2:
The patent segments the clamping system into distinct functional components: a tapered post integrated into the clamping device, a matching tapered bushing installed in the workbench, and a separate friction-based holding mechanism. This segmentation allows each component to perform its specific function efficiently, with the tapered engagement providing secure mounting and the friction mechanism providing workpiece holding, eliminating the need for complex threaded assemblies.
3Reliability
If conventional clamping devices apply force across the grain of wooden workbench tops, then they can secure workpieces, but they risk splitting the workbench top
Solution Approach 1:
The patent applies local quality by concentrating the clamping force through a precisely fitted bushing that is inserted into a doghole drilled perpendicular to the workbench surface. This localized engagement point ensures that forces are directed along the grain of the wood rather than across it, preventing splitting while maintaining secure clamping. The bushing creates a localized force distribution that protects the workbench top's structural integrity.
4Reliability
If conventional clamping devices use a rough outer surface on the post, then they enhance frictional grip, but they contribute to frictional erosive wear from the unprotected wooden inner surface of the doghole
Solution Approach 1:
The bushing serves as an intermediary that protects the doghole's inner wooden surface from erosive wear. The rough outer surface of the post maintains frictional grip, but now acts against the protected inner surface of the bushing rather than directly against the wooden doghole. This intermediary layer preserves both the frictional grip and the workbench surface.
Data Source
AI summary
An adjustable clamping assembly for securing an object (such as, for example, a board or other workpiece) to a work surface (such as, for example, a work bench or work table). A rigid rod member has a bent base section, as well as a clamping shoulder surface disposed at its distal end. A clamping head is slidably disposed along a portion of the length of the rigid rod member, and can be selectively secured in a place.