Toolless Sanding Block With Sliding Locking Shaft
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional sanding blocks with endless sanding belts often require tools to lock and unlock the belt for replacement, leading to potential loss of separate components and inconvenience.
Innovation Solution
A sanding block design featuring a base block with a cavity and locking shaft aperture, an end block that is slidably coupled with a spring bias to secure the locking shaft in place, allowing for toolless belt changing by sliding between retracted and extended positions, preventing the locking shaft from exiting and ensuring secure belt installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wedge or shim is used to keep the belt tight during sanding, then the belt tension is maintained, but the wedge or shim easily works loose and may become separated and lost
Solution Approach 1:
The locking shaft integrates the tensioning function and retention function into a single component. The shaft extends through the cavity and engages with the end block, combining the belt tensioning mechanism with the component retention mechanism, eliminating the need for separate wedges or shims that could become lost.
2Reliability
If an extension is used to lock the endless sanding belt onto the sanding block, then the belt is securely locked, but a tool is required to unlock and retract the belt for replacement
Solution Approach 1:
The locking shaft is designed to be manipulated directly by the user without requiring external tools. The shaft can be manually inserted, positioned, and secured within the cavity, allowing the user to perform the locking operation themselves. The spring-loaded end block automatically engages with the shaft, providing self-securing functionality.
3Ease of operation
If a locking shaft with shaft retainers is used, then the locking shaft is prevented from completely exiting the aperture, but the structure becomes more complex
Solution Approach 1:
The shaft retainer is divided into two separate components: a first shaft retainer at one end of the locking shaft and a second shaft retainer at the other end. This segmentation allows each retainer to independently prevent the shaft from exiting through its respective end of the aperture, providing comprehensive retention while maintaining a relatively simple overall structure.
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 easy and secure installation and removal of the sanding belt without tools, reducing the risk of lost components and enhancing user convenience.
Implementation Method 1
at least one spring within the cavity between the bottom of the cavity and the body of the end block
Data Source
AI summary
A sanding block with a base block, an end block, and a locking shaft. The base block has a cavity extending into the base block and a locking shaft aperture extending through the base block. The end block is slidably coupled with the cavity. The locking shaft extends through the locking shaft aperture and has at least one notch that engages with at least one ridge on the end block. The end block is slidable within the cavity between a retracted position and an extended position. When the end block is in the retracted position, the at least one notch is empty and the locking shaft is moveable along the locking shaft aperture. When the end block is in the extended position, each of the at least one ridge is within the at least one notch and the locking shaft is restricted in movement along the locking shaft aperture.