Constant-Length Drive Struts for Cross Slide Positioning
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Solution Overview
Problem
Machine tools require complex measuring systems for precise positioning of the second slide element, which is inefficient and prone to errors.
Innovation Solution
The use of four drive struts forming two drive groups with non-parallel struts to determine the position of the movable carriage element, combined with a common guide track for guide carriages to enhance torsional rigidity and precision, allowing for precise positioning by blocking specific movements and using a measuring system to detect relative positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If complex measuring systems are used for positioning the second slide element, then positioning precision is improved, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical measuring systems with a geometrically determined positioning mechanism. Four drive struts with constant lengths form a quadrilateral linkage that mechanically constrains the second slide element to specific positions based on the strut lengths and guide track geometry, eliminating the need for complex electronic measuring and control systems.
Solution Approach 2:
The invention uses the constant length parameter of the four drive struts as a geometric constraint to determine the position of the second slide element. By maintaining fixed strut lengths and using them as rigid constraints in the quadrilateral linkage, the system achieves precise positioning through geometric parameters rather than active measurement.
2Measurement precision
If four drive struts forming two drive groups are used to determine position, then positioning precision is improved, but device complexity increases
Solution Approach 1:
The positioning mechanism is segmented into two drive groups, each consisting of two non-parallel drive struts. Each drive group independently determines a line of position for the second slide element, and the intersection of these lines from both groups provides the precise position. This segmentation creates a redundant geometric constraint system that enhances precision.
Solution Approach 2:
The patent combines multiple positioning constraints from four drive struts into a unified geometric system. The two drive groups work together to simultaneously constrain the position of the second slide element, merging individual strut constraints into a cohesive positioning mechanism that achieves high precision through geometric intersection.
3Area of stationary object
If guide carriages are guided on a common guide track, then space requirement is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The common guide track serves multiple functions: it guides all four guide carriages, provides a reference geometry for positioning, and establishes the spatial relationships between drive struts. This multi-functional use of a single guide track reduces the overall space requirement while the precision is maintained through the geometric constraints of the constant-length struts.
Data Source
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AI summary
Four drive struts of invariant length, each with pivot joint, act on secondary slide element of compound slide system. Each of the struts is pivotally connected to guiding slide, which is guided in linearly movable manner transversely in relation to longitudinal direction of the respective drive struts. At least two of the drive struts run parallel to one another.