Random Orbital Stroke Adjuster for Tool-Free Radius Switching
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Solution Overview
Problem
Existing random orbital machines lack the ability to adjust stroke length between short and long strokes without disassembly or using special tools, limiting their versatility and user convenience.
Innovation Solution
An automatic adjustable stroke device for random orbital machines, featuring a counterweight shaft assembly and a mounting assembly with a stroke adjuster drivetrain, allows for variable stroke adjustment during operation without disassembly or special tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the stroke length is fixed in existing random orbital machines, then the machine structure is simple, but the versatility and adaptability are limited
Solution Approach 1:
The patent implements a dynamic stroke adjustment mechanism that allows the stroke length to be changed during operation. The mounting assembly can be positioned at different locations along the offset axis, enabling the user to switch between short and long strokes by simply moving the mounting assembly position, without requiring machine disassembly or complex adjustment procedures.
Solution Approach 2:
The random orbital machine is designed with a universal mounting assembly that can accommodate different workpiece attachment mechanisms and can be positioned at multiple locations along the offset axis. This single mounting assembly serves multiple functions: it can be used for both short stroke and long stroke operations, and can accommodate different types of workpieces or attachments.
2Ease of operation
If the stroke adjustment requires disassembly or special tools, then the machine structure is simpler, but the ease of operation and user convenience are reduced
Solution Approach 1:
The mounting assembly incorporates a self-adjusting mechanism that allows users to change stroke length without requiring special tools or disassembly procedures. The mechanism enables the mounting assembly to be easily repositioned along the offset axis through simple manual operation, making the adjustment process as convenient as changing operating parameters on a standard machine.
3Productivity
If a long stroke is used, then the machine can treat larger surface areas and correct deeper defects, but the machine becomes harder to control and produces more vibrations
Solution Approach 1:
The patent allows dynamic selection between short and long stroke modes based on the specific application requirements. When working on larger surface areas or correcting deeper defects, the user can switch to long stroke mode. When precision control and smooth operation are needed, the user can switch to short stroke mode, thereby optimizing both productivity and controlability as needed.
Data Source
AI summary
An automatic adjustable stroke device for a random orbital machine has a housing with a central axis and a wall defining a cavity. A counterbalance shaft assembly is rotatably disposed at least partially within the cavity. A shaft portion of the counterweight shaft assemblies aligned with the central axis. A mounting assembly is disposed at least partially within the cavity. The mounting assembly has a workpiece attachment mechanism. A stroke adjuster couples the counterweight shaft with the mounting assembly. The stroke adjuster enables the mounting assembly to adjust its stroke upon rotation of counterweight shaft. The mounting assembly variably adjusts a stroke radius of the workpiece attachment mechanism with respect to the central axis of the housing. The stroke adjuster has a gear automatically adjusting the mounting assembly stroke.