Boring Tool Differential Spindle Transverse Adjustment
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Solution Overview
Problem
Existing boring tools require complex structures and significant axial length to achieve precise fine adjustments, making them bulky and difficult to implement in a space-saving and cost-effective manner.
Innovation Solution
A compact boring tool design featuring a differential spindle mounted transversely to the tool carrier axis, with a scale disk for easy adjustment and a drive spindle connected to the differential spindle through a threaded nut, allowing for precise radial displacement of the tool carrier using a simple structure with few parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional adjusting screw with fine thread and adjustment wheel is used for precise fine adjustment, then measurement precision is improved, but the axial overall length becomes comparatively large and device complexity increases
Solution Approach 1:
The patent combines the adjusting screw and adjustment wheel into a single integrated adjusting member with a polygonal cross-section. The adjusting member directly converts rotational movement into axial displacement without requiring separate components, thereby achieving precise fine adjustment while significantly reducing the axial overall length of the boring tool.
Solution Approach 2:
The adjusting member serves multiple functions simultaneously: it acts as both the adjusting screw (converting rotation to axial movement) and the adjustment wheel (providing rotational input interface). The polygonal cross-section allows it to function as both a threaded fastener and a manually operable wheel, eliminating the need for separate adjustment wheel and reducing device complexity.
2Measurement precision
If a conventional adjusting screw with fine thread and adjustment wheel is used for precise fine adjustment, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent combines the adjusting screw and adjustment wheel into a single integrated adjusting member with a polygonal cross-section. The adjusting member directly converts rotational movement into axial displacement without requiring separate components, thereby achieving precise fine adjustment while significantly reducing the axial overall length of the boring tool.
Solution Approach 2:
The adjusting member serves multiple functions simultaneously: it acts as both the adjusting screw (converting rotation to axial movement) and the adjustment wheel (providing rotational input interface). The polygonal cross-section allows it to function as both a threaded fastener and a manually operable wheel, eliminating the need for separate adjustment wheel and reducing device complexity.
3Volume of moving object
If the differential spindle runs transversely to the axis of rotation of the tool carrier, then the design becomes more compact and stability is improved, but the mounting complexity increases
Solution Approach 1:
The differential spindle is oriented transversely (perpendicularly) to the axis of rotation of the tool carrier, utilizing a different spatial dimension for its operation. This transverse arrangement allows the adjusting member to convert rotational movement into radial displacement of the tool carrier, achieving a compact design while maintaining stability through the orthogonal geometry.
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 precise adjustments with a small play, achieving a translation of 1 μm between scale lines, resulting in a more stable and cost-effective, space-saving solution with high precision.
Implementation Method 1
The differential spindle enables a very large translation with a small play at the same time due to the corresponding difference in the thread pitches
Data Source
Figure 1~2
Figure 3~5
AI summary
The boring tool has a tool body (2) on which a tool holder (10) is radially adjustable. An adjusting element (42) serves to set the boring diameter. A gear unit converts a rotation of the adjusting element (42) into a sliding motion of the tool holder (10). The gear unit has a differential spindle (13) which, for fine adjustment of the boring diameter, converts a rotation of a scale disk (26) into a sliding motion of the tool holder (10). The differential spindle (13) is mounted in a bore (51) of the tool holder (10) and extends perpendicular to the axis of rotation (A).