Gearbox Three-Point Mounting Reduces Case Distortion
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Solution Overview
Problem
High-torque gearboxes in industrial applications often experience premature failure due to distortion of the gearbox case during mounting, leading to misalignment of gear teeth and increased Hertzian stress, which results in costly downtime and maintenance.
Innovation Solution
The gearbox is mounted using exactly three active attachment points on a mounting plate, with each point featuring a flange and aperture for bolts, reducing case distortion and maintaining precise alignment of gear teeth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the gearbox is mounted at four points, then the mounting stability is improved, but the gearbox case distortion increases due to geometry control difficulties
Solution Approach 1:
The mounting system is segmented from four attachment points to three active attachment points. This segmentation removes the problematic fourth point that causes geometry control difficulties, while maintaining sufficient mounting stability through the remaining three points that define a unique plane.
Solution Approach 2:
The invention extracts the problematic element (the fourth mounting point) from the system. By taking out the fourth attachment point, the patent eliminates the source of geometry control difficulties and case distortion while preserving the essential mounting function through the three remaining active attachment points.
2Strength
If strong attachment bolts are used to fasten the gearbox, then the mounting strength is improved, but the gearbox case distortion increases due to high mounting forces
Solution Approach 1:
The patent applies partial action by using only three attachment points instead of four. This partial mounting configuration provides sufficient mounting strength through properly positioned bolts while avoiding the excessive forces and geometry control issues that arise from adding a fourth mounting point.
3Ease of manufacture
If the gearbox case is distorted, then the mounting simplicity is improved, but the gear alignment precision deteriorates
Solution Approach 1:
The mounting system is segmented to use exactly three active attachment points, which simplifies the mounting process by eliminating the need to control the geometry of a fourth point. This segmentation maintains gear alignment precision because three points define a unique plane, ensuring proper case alignment without distortion.
4Stability of the object's composition
If four-point mounting is used, then the mounting stability is improved, but the likelihood of gear failure increases due to misalignment
Solution Approach 1:
The invention extracts the problematic fourth mounting point that causes geometry control difficulties and case distortion. By using only three active attachment points, the patent maintains mounting stability while eliminating the source of misalignment that leads to gear failure, thereby improving gear reliability.
Solution Approach 2:
The patent converts the potential harm of reduced attachment points into a benefit. By intentionally using only three attachment points instead of four, the invention transforms what might seem like a reduction in stability into an actual improvement in gear alignment and reliability, eliminating case distortion while maintaining sufficient mounting stability.
Data Source
AI summary
A gearbox comprises a gearbox housing containing a gear train whose shafts are supported by the housing. The housing is fastened to a mounting plate at exactly three attachment points. This three point attachment reduces distortion of the housing that may cause misalignment of individual meshing gears in the gear train, leading to premature failure of those gears transmitting high torque.