Movable Engaging Pin Assembly for Nail Gun Jam Prevention
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Solution Overview
Problem
Existing nail guns are prone to jamming due to misalignment of rack and gear teeth, leading to misfiring and potential personal injury during troubleshooting.
Innovation Solution
A transmission member with a rotating member and engaging pins, including at least one movable engaging pin, is used to engage with the striker's tooth grooves, allowing for stable engagement and preventing jamming by enabling the movable pin to align with the tooth grooves under impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If rack and gear teeth are used for transmission, then the transmission structure can drive the piston to move, but the teeth may get jamming when not accurately meshed
Solution Approach 1:
The patent converts the static rack-and-gear transmission into a dynamic cam-roller system where the roller can rotate freely on the cam surface. This dynamic configuration allows the roller to automatically adapt to position deviations and eliminate jamming, while still effectively driving the piston during the power stroke.
Solution Approach 2:
The patent introduces a roller as an intermediary element between the cam and the piston driving mechanism. The roller acts as a mediator that converts rotational motion into linear motion while preventing direct tooth-to-tooth contact, thereby eliminating the jamming issue inherent in rack-and-gear systems.
2Use of energy by moving object
If rack and gear transmission is used, then energy can be stored in power supply springs or air, but misalignment causes misfiring and personal injury risk
Solution Approach 1:
The dynamic cam-roller mechanism ensures reliable energy transfer from the motor to the piston by eliminating jamming. The roller's free rotation allows it to continuously track the cam profile, ensuring consistent timing and force application, which prevents misfiring and the associated safety hazards.
Solution Approach 2:
The patent converts the potential harmful effect of position misalignment into a beneficial feature. Instead of treating misalignment as a defect to be eliminated through precision manufacturing, the design allows the roller to naturally accommodate and correct position deviations, turning a potential source of jamming into a self-correcting mechanism that enhances safety.
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
The solution enhances safety by preventing jamming and misfiring, ensuring stable nail firing and reducing the risk of personal injury.
Implementation Method 1
an elastic assembly placed between the movable engaging pin and the rotating member, wherein the elastic assembly comprises a spring with one end abutting against the movable engaging pin, and the other end abutting against the rotating member
Data Source
AI summary
A transmission member and an anti-jamming assembly and a nail gun having the same. The transmission member comprises a rotating member configured to be driven by a driving motor to rotate, and an engaging part arranged on the rotating member. The rotating member has a plurality of pin mounting holes having at least one movable pin mounting hole. The engaging part comprises a plurality of engaging pins installed in the plurality of pin mounting holes. The plurality of engaging pins comprises at least one movable engaging pin moveably installed in at least one movable pin mounting hole. Two adjacent engaging pins define a gap therebetween. The anti-jamming assembly comprises a striker configured to strike nails out of the nail gun along a striking direction for nailing; and the transmission member coupled with the striker for driving the striker to move in a direction opposite to the striking direction.