Dual Chuck Screwdriver Jaws for Slippage Prevention
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Solution Overview
Problem
Existing screwdriver technologies fail to prevent slippage when driving screws into dense surfaces, leading to damage and increased muscle fatigue, as they cannot maintain sufficient force to keep the screwdriver tip engaged in the screw head, especially in high-force applications.
Innovation Solution
A dual chuck device with a cylindrical design that uses a combination of jaws and sleeves to securely hold the screwdriver or drill bit, featuring a mechanism where the screw contact sleeve automatically disengages when the screw penetrates the surface, allowing the screw to continue being driven without manual pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional screwdriver tips are used to drive screws into dense surfaces, then the screwdriver can rotate the screw, but the tip slips out of the screw head due to insufficient holding force
Solution Approach 1:
The patent employs a nested structure where the retention sleeve is positioned within the chuck body, and the jaws are nested within the sleeve. This multi-layered nesting arrangement allows the screwdriver tip to be securely held by the jaws, which are in turn retained by the sleeve, creating a hierarchical holding system that prevents slippage while maintaining rotational capability
Solution Approach 2:
The patent implements a dynamic retention mechanism where the retention sleeve can move axially within the chuck body. During screw driving, the sleeve is held in a retracted position to allow jaw engagement; when the screw reaches the surface, the sleeve automatically advances to push the jaws away from the tip, enabling automatic adaptation to different operational phases without manual intervention
2Reliability
If manual pressure is continuously applied to keep the screwdriver tip engaged in the screw head, then slippage is prevented, but muscle fatigue increases
Solution Approach 1:
The patent implements a self-service mechanism where the retention sleeve automatically detects when the screw contacts the work surface and autonomously actuates to release the jaws from the screwdriver tip. This eliminates the need for continuous manual pressure application, as the system self-regulates the engagement state based on the screw driving progress, thereby preventing slippage while reducing user fatigue
3Reliability
If the screwdriver tip is held firmly in the screw head, then slippage is prevented, but the device cannot accommodate further screws after one is driven
Solution Approach 1:
The patent employs a dynamic retention sleeve that changes its axial position based on operational conditions. During screw driving, the sleeve maintains the jaws in an engaged state for firm holding; after the screw is driven, the sleeve automatically advances to push the jaws away, enabling the device to release and immediately accommodate the next screw without manual intervention, thus providing both firm holding and multi-screw capability
Data Source
AI summary
A dual chuck device with a shaft grasping assembly and a screw stem grasping assembly each with respective jaws, driving mechanism and sleeve. Upon turning a respective sleeve in one direction or the reverse direction, the respective drive mechanism moves the jaws toward or away from a grasping position. In the grasping position, the screw stem is grasped. When the sleeve is presses against a working surface being penetrated by a driven screw, the driving mechanism moves the jaws in the reverse direction to move them apart to no longer grasp the screw.