Pulley Return Transmission for Electric Nail Gun Nailing Rod Reset
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Solution Overview
Problem
Conventional electric nail guns face issues with metal springs becoming brittle and rubber strings experiencing fatigue due to long-term impact, as their action distances are equal to the nailing stroke, leading to reduced service life and increased brittleness.
Innovation Solution
A pulley assembly configuration is used to reduce the action distance of the return elastic component, employing a movable pulley and towing rope with a return elastic component, such as a rubber string or coil springs, to store and release elastic potential energy, with the action stroke being less than the nailing stroke.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If metal springs are used as return elastic component with action distance equal to nailing stroke, then sufficient elastic potential energy is stored to drive nailing rod reset, but the springs become brittle after long-term impact
Solution Approach 1:
The return transmission mechanism is segmented into multiple components: return elastic component, pulley assembly, and towing rope. This segmentation allows the elastic component to operate over a shorter distance while still achieving full nailing rod reset through mechanical advantage from the pulley system.
Solution Approach 2:
The pulley assembly acts as an intermediary between the return elastic component and the nailing rod. It translates the shorter action distance of the elastic component into the full reset stroke of the nailing rod, reducing the wear and impact on the elastic component itself.
2Reliability
If rubber string is used as return elastic component with action distance equal to nailing stroke, then impact brittleness is avoided, but elastic force is insufficient and fatigue occurs after prolonged operation
Solution Approach 1:
The pulley assembly serves as a mechanical intermediary that amplifies the elastic force from the rubber string. Through the pulley mechanism, the insufficient direct elastic force is transformed into sufficient resetting force for the nailing rod, while the rubber string operates over a reduced distance to minimize fatigue.
Solution Approach 2:
The system dynamically utilizes the pulley assembly to convert the limited elastic force and short action distance of the rubber string into effective resetting force, adapting the force transmission ratio to meet the requirements of the nailing rod reset operation.
3Reliability
If action distance of return elastic component is reduced to less than nailing stroke, then resistance to fatigue and brittleness is enhanced, but additional transmission mechanism is required
Solution Approach 1:
The pulley assembly is introduced as a compact intermediary mechanism that enables the return elastic component to operate over a reduced action distance while still achieving full nailing rod reset. This adds minimal complexity compared to the substantial benefit of extended component service life.
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
This configuration enhances the resistance to fatigue and durability of the return elastic components, reducing impact brittleness and extending the service life of the nailing rod mechanism.
Implementation Method 1
the return elastic component is configured between the gun body frame and the guiding holder to drive the guiding holder configured in a movable manner... the at least one return elastic component will drive the guiding holder in a way to release the elastic potential energy
Implementation Method 2
The pulley assembly comprises at least one movable pulley, a guiding holder, and at least one towing rope... The at least one movable pulley is pivoted inside the guiding holder in a freely rotatable manner
Data Source
AI summary
A return transmission of nailing rod for electric nail gun is disclosed, comprising a pulley assembly and a return elastic component configured in a gun body frame. The pulley assembly includes a towing rope, a movable pulley that guides the towing rope. A guiding holder is provided for pivoting the movable pulley. When the nailing rod moves downward along a nailing stroke to shoot the nail, the towing rope can tow the movable pulley and drive the guiding holder to move an action stroke in a way to store the elastic potential energy of the return elastic component. After nailing, the return elastic component will drive the guiding holder in a way to release the elastic potential energy, so that the guiding holder can move along the action stroke back to its original position, and the guiding holder will tow the towing rope through the movable pulley, so as to drive the nailing rod to move along the nailing stroke back to its original position. In this way, the load of the return elastic component can be reduced.