Curved Track Motion Guide with Inclined Rolling Surfaces
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Solution Overview
Problem
Existing motion guiding devices face difficulties in smoothly moving a moving body along a track body with a curve portion due to differences in path lengths between inner and outer trajectories, leading to backlash and increased noise, requiring additional rotation mechanisms that complicate the system.
Innovation Solution
A motion guiding device with a track body featuring a groove and multiple rolling surfaces, where rotating bodies contact these surfaces in a straight line configuration, with at least one surface inclined, allowing for smooth movement along curved sections without additional mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a rotating body contacts the top and side surfaces of a track body in a V guide configuration, then linear movement along the track body is achieved, but movement along curve portions becomes difficult due to path length differences causing backlash and overloading
Solution Approach 1:
The track body is segmented into multiple rolling surfaces (first rolling surface, second rolling surface, third rolling surface) with different orientations. The rotating body is segmented to contact these surfaces at different locations, with contacts disposed on the same straight line. This segmentation allows each surface to contribute to guiding the rotating body through curve portions without path length differences causing backlash.
Solution Approach 2:
Different portions of the track body have different local qualities - the first rolling surface has a different orientation than the second and third rolling surfaces. This local variation in surface orientation allows the system to adapt to curve portions while maintaining proper contact and eliminating the path length difference problem that causes backlash.
2Ease of operation
If a rotation mechanism is added to adjust the position of the rotating body for curve portions, then smooth movement along curves is achieved, but the number of parts increases and running sound increases
Solution Approach 1:
The complex rotation mechanism is extracted and replaced by a simpler configuration where the track body itself provides the necessary guidance through its multi-surface structure. The rotating body naturally follows the curve portions by contacting the differently oriented rolling surfaces, eliminating the need for additional rotation adjustment mechanisms.
Solution Approach 2:
The track body's rolling surfaces are configured to automatically guide the rotating body through curve portions without requiring external adjustment mechanisms. The geometric arrangement of the rolling surfaces causes the rotating body to self-adjust its position naturally as it moves along the track, reducing device complexity and running sound.
3Ease of operation
If multiple rolling surfaces with different orientations are used in the track body, then smooth movement along curve portions is achieved without additional mechanisms, but the manufacturing complexity of the track body increases
Solution Approach 1:
The solution moves from a two-dimensional V guide configuration to a three-dimensional arrangement with rolling surfaces oriented in different directions and planes. The first rolling surface is oriented differently from the second and third surfaces, creating a spatial configuration that guides the rotating body through curves while maintaining manufacturability through systematic orientation patterns.
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 smooth operation and reduced noise in moving bodies along curved track sections with a simplified configuration, eliminating backlash and the need for extra parts.
Implementation Method 1
The moving body has a plurality of rotating bodies that roll on the plurality of rolling surfaces
Data Source
AI summary
In a motion guiding device including a track body, and a moving body provided to be movable along the track body, the track body includes a groove formed along a longitudinal direction of the track body and a plurality of rolling surfaces formed inside and outside the groove. The moving body includes a plurality of rotating bodies that roll on the plurality of rolling surfaces, and adopts a configuration in which respective contacts in which the plurality of rotating bodies are in contact with the plurality of rolling surfaces are disposed on the same straight-line in a cross-section orthogonal to the longitudinal direction of the track body.