Compact Turning Device for Heavy Objects Using Planetary Gear Reducer
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Solution Overview
Problem
Conventional turning devices for heavy objects, such as test heads in probe devices, require large gears and complex structures, leading to increased size, cost, and difficulty in reducing the turning radius and installation space.
Innovation Solution
A compact turning device design featuring a planetary gear type speed reducer with ball bearings and a motor, where the turning arm and drive device are positioned within the width of the heavy object, utilizing a double speed reduction mechanism to reduce the turning radius and support the heavy object in a cantilever manner.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a motor and gear are used to support the weight of a test head, then the test head can be turned, but the gear becomes larger in size and the structure becomes complicated
Solution Approach 1:
The patent repositions the turning mechanism from a conventional horizontal gear arrangement to a vertical arrangement where the turning arm rotates around an axial line. This dimensional change allows the heavy test head to be supported and turned by a more compact motor and planetary gear assembly, reducing structural complexity while maintaining turning capability.
Solution Approach 2:
The patent replaces a conventional motor-gear system with a planetary gear type speed reducer that integrates the motor and gear functions. This substitution eliminates the need for separate large gears and multiple components, simplifying the overall structure while providing the necessary turning force for the heavy test head.
2Ease of operation
If a large gear is used to turn the test head, then the test head can be rotated, but the turning radius increases and installation space is required
Solution Approach 1:
The patent changes the rotation geometry from a conventional horizontal axis to a vertical axial line. This allows the turning arm and drive device to be disposed within the width of the test head, dramatically reducing the turning radius and installation space requirements while maintaining full rotation capability.
Solution Approach 2:
The patent nests the motor and planetary gear assembly within the width of the test head itself, rather than requiring external space. The turning arm connects the test head to this compact drive device, allowing the entire turning mechanism to be contained within the test head's footprint, thus minimizing installation space.
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 provides a compact, cost-effective, and stable turning mechanism for heavy objects, reducing the turning radius and installation space requirements while maintaining stability and efficiency in turning operations.
Implementation Method 1
a planetary gear type speed reducer with a pair of ball bearings disposed between the fixing section and the turning output section
Implementation Method 2
a planetary gear type speed reducer with a pair of ball bearings disposed between the fixing section and the turning output section
Implementation Method 3
a motor including a rotor shaft coaxially connected to a stator having a coil and the turning input section of the planetary gear type speed reducer
Data Source
AI summary
A compact turning device for a heavy object, comprising a turning arm joined to the heavy object and a drive device drivingly turning the turning arm. The drive device further comprises a motor incorporating a rotor shaft connected to the rotating input part of a planetary gear type speed reducer on a same axis (A). Also, the turning arm is installed by joining its first plane to the plane of the planetary gear type speed reducer forming the rotating output part and its second plane orthogonal to the first plane to the heavy object. The turning arm and the drive device are disposed within the width (D) of the heavy object in the axis (A) direction of the turning pivot of the turning arm. The planetary gear type speed reducer of the drive device may be disposed in two front and rear stages.