Drill-Powered Caulking Gun With Fine Pitch Lead Screw
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Solution Overview
Problem
Existing caulking guns require significant physical effort to operate, and there is a need for a more economical and efficient solution that includes a lead screw, removable nut with fine pitch threads, a thrust bearing, and an easy-to-load caulking gun cartridge holder.
Innovation Solution
A drill-powered caulking gun is designed with a cartridge holder, a lead screw with fine pitch threads, a removable nut, a thrust bearing, and a plunger, which reduces friction and physical effort required for operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional caulking gun design is used, then the structure is simple, but significant physical effort is required to operate it
Solution Approach 1:
The patent replaces the traditional manual mechanical operation with a drill-powered system. The drill motor drives a lead screw mechanism through a hex drive member, converting rotational motion into linear motion of the plunger. This substitution of manual mechanical effort with powered mechanical automation directly reduces the physical effort required while managing structural complexity through standardized components.
Solution Approach 2:
The lead screw mechanism with fine pitch threads (at least 24, 28, 32, or 40 threads per inch) creates a dynamic mechanical advantage system. The fine pitch threads convert high-speed rotational motion from the drill into slow, high-force linear motion, dynamically adapting the motion characteristics to reduce operational effort while maintaining control.
2Ease of operation
If a lead screw with fine pitch threads is used, then less physical effort is required, but manufacturing precision must be higher
Solution Approach 1:
The patent specifies fine pitch threads with at least 24, 28, 32, or 40 threads per inch, changing the thread pitch parameter to achieve mechanical advantage. This parameter change reduces the physical effort required by increasing the mechanical advantage ratio, while the precision requirements are managed through standardization of these common thread pitch values.
3Ease of operation
If a thrust bearing is added to reduce friction, then ease of operation improves, but device complexity increases
Solution Approach 1:
The thrust bearing acts as an intermediary component between the lead screw and the plunger assembly. It mediates the axial loads and reduces friction by providing a dedicated bearing surface, thereby improving ease of operation. The complexity increase is minimized by using a single, standardized thrust bearing component that integrates multiple functions.
4Stability of the object's composition
If a cartridge holder with rigid connection is used, then structural stability improves, but ease of loading and removing cartridges deteriorates
Solution Approach 1:
The cartridge holder is segmented into a modular design with a front end cap, rear end cap, and cartridge support member. The cartridge support member features a semi-circular cross-section that receives the cartridge, while the end caps can be independently removed. This segmentation allows the holder to maintain structural stability during operation while enabling easy cartridge loading and removal by simply detaching the end caps.
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 drill-powered caulking gun reduces the physical strength needed to operate, decreases fatigue, and is more economical to manufacture compared to prior art caulking guns.
Implementation Method 1
The lead screw preferably has a fine thread, which is at least 24 threads per inch, at least 28 threads per inch, or at least 32 threads per inch, or at least 40 threads per inch.
Implementation Method 2
The thrust bearing and washer reduce the amount of friction between the plunger and the lead screw.
Implementation Method 3
The nylon lock nut is tightened, such that the plunger, thrust bearing and washer may rotate relative to the threaded diameter.
Data Source
AI summary
A drill powered caulking gun preferably includes a cartridge holder, a lead screw, a lead screw nut, a thrust bearing, a washer and a plunger. The cartridge holder preferably includes a front end cap, a cartridge support member and a rear end cap. The lead screw preferably includes a threaded diameter, a hex drive member, a thrust bearing shoulder and a threaded end. The threaded diameter includes a fine thread.The lead screw nut includes a retention flange, a D-shaped portion and a threaded body. The lead screw nut is inserted through a D-shaped opening in the rear end cap. The lead screw nut is retained in the rear end cap with a jam nut. The plunger, thrust bearing and washer are rotatably retained on the threaded end with a lock nut. The plunger is used to push a diaphragm in the caulking cartridge to dispense caulk through a nozzle.