Spring Stabilizer for Orbital Sander Disc Vibration
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Solution Overview
Problem
The edge of a sanding disc in conventional orbital sanders rises improperly due to vibration caused by rotational inertia, leading to unstable sanding and reduced quality, and existing pad supports fail to maintain stability and service life due to their non-tensile properties and limited eccentric displacement.
Innovation Solution
A sanding disc stabilizing structure using at least four springs with one end attached to the casing and the other end to the sanding disc, allowing for stretching to offset the increased distance between attachment points, maintaining stability and enabling larger eccentric displacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a conventional pad support (railing or cylindrical) is used to limit sanding disc vibration, then the sanding disc stability is improved, but the pad support service life deteriorates due to continuous pulling during operation
Solution Approach 1:
The patent changes the physical state of the pad support from rigid to elastic by using a spring structure. The spring can elongate and contract dynamically, transforming from a static support element to a dynamic one that adapts to operational forces, thereby extending service life while maintaining stability.
Solution Approach 2:
The pad support is designed as a dynamic element that can change its length in response to operational forces. The spring structure allows the pad support to elongate when pulled during operation and return to its original state, creating a dynamic system that adapts to continuous use rather than failing under static load.
2Stability of the object's composition
If the pad support length is increased to accommodate eccentric displacement, then the sanding disc stability is improved, but the pad support structure complexity increases
Solution Approach 1:
Instead of increasing the static length of the pad support, the patent uses a spring that changes its length parameter dynamically. The spring elongates to accommodate eccentric displacement during operation and returns to its original length when not in use, achieving the necessary stability without permanent structural complexity.
Solution Approach 2:
The pad support structure transitions from a static fixed-length design to a dynamic variable-length design using a spring. This allows the system to adapt its geometry in real-time based on operational requirements, maintaining simplicity while achieving the necessary stability during eccentric motion.
3Manufacturing precision
If a rigid pad support is used to maintain sanding disc position, then the manufacturing precision is improved, but the adaptability to eccentric displacement deteriorates
Solution Approach 1:
The pad support uses a spring that can change its length parameter in response to eccentric displacement forces. This allows the system to maintain precise sanding disc positioning while adapting to the dynamic requirements of eccentric motion, combining manufacturing precision with operational adaptability.
Solution Approach 2:
The rigid pad support is replaced with a dynamic spring-based system that can adjust its geometry in real-time. The spring elongates and contracts to accommodate eccentric displacement while maintaining the sanding disc in its correct position, achieving both precision and adaptability through dynamic response.
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 spring-based stabilizing structure maintains the sanding disc's stability and extends the service life of the pad support by accommodating the eccentric displacement, ensuring consistent and accurate sanding performance.
Implementation Method 1
at least four springs (14) are provided, each of the springs (14) having a first end (141) attached to the casing (11) and a second end (142) attached to the sanding disc (13)... During the orbital motion of the sanding disc (13), the springs (14) are stretched. The deformation of each of the at least four springs (14) offsets a change of distance between the first end (141) and the second end (142)
Implementation Method 2
When the eccentric shaft of the orbital sander drives the sanding disc to perform an eccentric orbital motion, the sanding disc is affected by rotational inertia (also known as the moment of inertia) to produce drifting-like vibration
Data Source
Figure 1~2
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AI summary
A sanding disc (13) stabilizing structure of an orbital sander (10) comprises a casing (11), a sanding power source (12), a sanding disc (13), and at least four springs (14). The sanding power source (12) is assembled on the casing (11) and comprises a drive shaft (122) and a tool holder (123) disposed on the drive shaft (122) and offset from an axis of the drive shaft (122). The center of the sanding disc (13) driven by the sanding power source (12) to perform an orbital motion is disposed on the tool holder (123) with a locking screw (131). Two ends of each of the at least four springs (14) are respectively disposed on the casing (11) and the sanding disc (13). The free length of each of at least four springs (14) is greater than the spacing (15) between an installation part of the casing (11) and an installation part of the sanding disc (13) provided for one of the at least four springs (14).