Power Tool Adapter for Garage Door Torsion Spring Loading
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Solution Overview
Problem
Current power tools are not designed to efficiently apply torsion forces to the springs of garage door counterbalancing mechanisms, requiring manual and time-consuming procedures that are dangerous and costly, with existing solutions either being temporary or permanently installed, increasing setup and maintenance costs.
Innovation Solution
Adapting common power tools like drills or grinders with a housing and transmission system that includes a worm gear and coupling member to apply rotational force to the torsion coil springs, allowing for easy and safe application of torsion forces with minimal setup and reduced wear on components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual steel rods are used to rotate the winding cone, then the spring can be loaded with torsion force, but the procedure requires considerable time and is dangerous due to limited force application
Solution Approach 1:
The patent replaces the manual mechanical system of using steel rods with a power tool-driven mechanical system. The power tool motor provides automated rotational force to the winding cone through a transmission mechanism, eliminating the need for manual force application while significantly reducing loading time and improving safety.
Solution Approach 2:
The patent introduces a transmission mechanism as an intermediary between the power tool and the winding cone. This transmission system (comprising gears, shafts, and coupling members) transfers and controls the motor's rotational force, enabling safe and efficient spring loading without direct manual intervention.
2Productivity
If temporary mechanical power devices are used to load the spring, then the loading process is automated, but setup work over the shaft or at the winding cone is required for each spring
Solution Approach 1:
The patent designs a universal coupling member that can engage with different winding cone configurations through various engagement members (hooks, latches, or clamps). This allows the same device to work with multiple spring types and door mechanisms without requiring custom setup for each spring, thereby maintaining high productivity while reducing setup complexity.
Solution Approach 2:
The coupling member is designed with dynamic adjustment capabilities, allowing it to adapt to different winding cone positions and configurations. The engagement members can be adjusted or repositioned to match different spring setups, eliminating the need for complex predetermined setup procedures.
3Reliability
If permanently installed mechanisms are used, then the spring loading is automated and safe, but both installation and subsequent repair costs increase
Solution Approach 1:
The patent divides the spring loading system into separate, modular components: a power tool unit, a transmission mechanism, and a coupling member. This segmentation allows the system to be assembled from standard off-the-shelf parts rather than requiring expensive custom-installed mechanisms, thereby maintaining safety while reducing installation and repair costs.
Solution Approach 2:
The patent employs a portable, non-permanently-installed device that can be used temporarily for spring loading. The coupling member and transmission components are designed to be detachable and reusable across multiple applications, avoiding the high costs associated with permanent installations while maintaining safety and automation benefits.
4Ease of repair
If common power tools are adapted with housing and transmission system, then the device has reduced moving parts to wear out, but the device complexity increases
Solution Approach 1:
The transmission mechanism serves as an intermediary that isolates the power tool motor from direct engagement with the winding cone. This protects the motor from wear and shock loads, reducing maintenance requirements. The transmission components (gears, shafts, coupling members) are designed with sufficient durability to handle the torsion loading cycles without frequent replacement.
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
Enables quick, safe, and efficient application of torsion forces to garage door springs with reduced effort and time, minimizing setup requirements and wear on the device, thus reducing costs and improving safety.
Implementation Method 1
The slot is formed in a driven member which may be the gear portion of a worm gear
Implementation Method 2
A power transferring means; e.g., transmission, is contained in the housing, and may be a speed reducer of any conventional configuration
Implementation Method 3
Most of the foregoing door mechanisms utilize long coil springs that are placed under a rotational or torsion force to apply a lifting force to the door
Implementation Method 4
The springs must be anchored on one end, and the free end connected to a winding cone on the shaft, and the winding cone is then rotated to 'load' the springs; e.g., place the springs under torsion force
Data Source
AI summary
A device to apply a rotational force to a spring of a rollup or overhead garage door counterbalancing mechanism. The device has a rotatable driven member mounted in a housing. The housing and the driven member have slots with an open end adapted to receive the shaft of the overhead garage door counterbalancing mechanism. A coupling member is configured to mount to the driven member and connect the driven member to the winding cone of a garage door spring to apply rotational force to the spring. The housing with the driven member may be connected to the body of an existing power tool in place of the original tool head, or, the housing may be permanently combined with a motor and transmission to provide a special purpose tool.