Rotary Table Device with Integrated Insulation and Ring Scale
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional rotary table devices require multiple components and complex assembly processes, including separate insulating sheets, to achieve endless rotation and accurate position detection, leading to increased man-hours and alignment difficulties.
Innovation Solution
A rotary table device with a ring scale extending over the entire circumference of the table, integrated insulating layers on the armature assembly, and centering location fitting for accurate and simplified assembly, reducing the need for separate insulating sheets and facilitating easy attachment of the ring member to the table.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a tape-shaped scale is bonded to a region corresponding to the rotational angular range, then position detection is enabled, but the scale cannot be extended over the entire circumference for endless rotation
Solution Approach 1:
The scale is divided into multiple separate scale pieces that can be individually bonded to the table circumference. Each scale piece covers a specific angular range, and multiple pieces are assembled together to form a complete circular scale for endless rotation detection.
Solution Approach 2:
Different regions of the table circumference are equipped with different scale pieces optimized for their specific locations. The scale pieces can have different lengths, positions, and characteristics suited to their respective mounting locations, allowing flexible assembly around the entire circumference.
2Reliability
If separate insulating sheets are disposed between the armature assembly and the bed, and between the armature assembly and the table, then insulation is provided, but the number of components increases and assembly complexity increases
Solution Approach 1:
The insulating function is merged into the armature assembly structure itself. The armature assembly incorporates integrated insulating features that provide insulation between the armature and both the bed and the table, eliminating the need for separate insulating sheets and reducing component count.
Solution Approach 2:
The armature assembly is designed to perform multiple functions simultaneously: it provides electromagnetic actuation, structural support, and electrical insulation. The integrated design makes the armature assembly a multi-functional component that replaces what would otherwise require separate dedicated insulating components.
3Reliability
If separate insulating sheets are used, then insulation is achieved, but assembly time and alignment difficulty increase
Solution Approach 1:
The insulating function is merged into the armature assembly structure itself. The armature assembly incorporates integrated insulating features that provide insulation between the armature and both the bed and the table, eliminating the need for separate insulating sheets and reducing component count.
Solution Approach 2:
The insulating features are pre-integrated into the armature assembly during manufacturing, so that insulation is already in place before assembly. This preliminary integration eliminates the need for separate insulation installation steps during final assembly, reducing assembly time and complexity.
4Measurement precision
If the scale is extended over the entire circumference, then endless rotation position detection is enabled, but joining opposite ends of the scale becomes difficult
Solution Approach 1:
The scale is divided into multiple separate scale pieces that can be individually bonded to the table circumference. Each scale piece covers a specific angular range, and multiple pieces are assembled together to form a complete circular scale for endless rotation detection.
Solution Approach 2:
Instead of requiring a single continuous scale covering the entire circumference, the solution uses multiple partial scale pieces that collectively cover the full 360 degrees. This partial approach applied to multiple segments is easier to manufacture and assemble than a single excessive-length continuous scale.
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
The solution enables accurate and seamless position detection over the entire circumference, reduces assembly complexity, and allows for a more compact design with improved insulation and reduced component count, enhancing the device's reliability and ease of use.
Implementation Method 1
a linear motor which includes an armature assembly on a primary side of the linear motor and a field magnet on a secondary side of the linear motor. The armature assembly includes a plurality of armature coils... The field magnet includes a plurality of plate-shaped magnets... The armature coils and the magnets are arranged in the circumferential direction so that the armature coils face the magnets
Implementation Method 2
The position of the table is detected by reading the scale by using an optical sensor disposed on the bed
Implementation Method 3
a disk-shaped table rotatably mounted on the bed via a bearing
Data Source
AI summary
Disclosed is a rotary table device which accurately detects the position of a table rotating in relation to a bed over the entire circumference and whose assembly is facilitated by covering an armature assembly with an insulating layer for insulation between the bed and the table. In the rotary table device, a ring member having a ring scale extending over the entire circumference of the ring member is disposed around a lower part of the table having a field magnet extending over the entire circumference of the table. A sensor for reading the ring scale is disposed on the bed on which armature coils of the armature assembly are arranged in the circumferential direction to face the field magnet.