Clamping Device Scraper Clearance Reduction
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Solution Overview
Problem
Existing clamping devices face issues with clearance between the gripping assembly and the clamp rod, allowing foreign matter to enter and reducing the durability of the scraper, while also consuming excessive pressurized air and lacking sufficient pulling strength, especially in compact designs.
Innovation Solution
A clamping device with a gripping assembly and clamp rod design that includes tapered sections with flat and conical surfaces, ensuring a circular cross-section in the vicinity of the scraper, which reduces clearance and enhances the scraper's durability, and a compact design that maintains pulling strength by optimizing the cross-sectional area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the gripping assembly and clamp rod are designed with a tapered section to increase gripping force, then the clamping capability is improved, but clearance appears between the gripping assembly and clamp rod allowing foreign matter ingress
Solution Approach 1:
The clamp rod is designed with different cross-sectional shapes at different locations: a tapered section for gripping force and a circular cross-section section near the scraper for sealing. This local differentiation allows the rod to simultaneously achieve both clamping capability and foreign matter protection without compromise
2Reliability
If the scraper is made flexible to block clearance, then foreign matter protection is improved, but the scraper durability deteriorates due to contact with grip forming members
Solution Approach 1:
The clamp rod features a circular cross-section portion positioned specifically near the scraper, which eliminates clearance without requiring the scraper to be flexible. This allows the scraper to remain rigid and durable while still achieving effective sealing against foreign matter
3Volume of moving object
If the clamp rod has a small diameter for compact design, then the device compactness is improved, but the pulling strength deteriorates
Solution Approach 1:
The clamp rod employs variable cross-sectional parameters along its length, with a smaller diameter for compactness and a larger circular cross-section portion near the scraper to maintain sufficient pulling strength and structural integrity without increasing overall device volume
4Reliability
If pressurized air is used to prevent foreign matter ingress, then foreign matter protection is improved, but air consumption increases
Solution Approach 1:
The patent removes the need for pressurized air by implementing a structural solution - the circular cross-section portion of the clamp rod physically blocks clearance and prevents foreign matter ingress through mechanical design rather than pneumatic pressure, eliminating air consumption entirely
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 effectively prevents foreign matter ingress, reduces air consumption, and ensures the durability of the scraper and pulling strength, even in compact designs, by maintaining a circular cross-section and optimizing the cross-sectional area.
Implementation Method 1
a tapered section at its upper end side portion that continues upwards from the intermediate rod section, that is formed so that its external diameter increases progressively upwards
Implementation Method 2
in the vicinity of the scraper, the cross section of the one or a plurality of grip forming members and the clamp rod orthogonal to an axis of the clamp rod is formed as circular
Data Source
AI summary
A clamping device increases the diameter of a gripping assembly that is inserted into a hole in a workpiece and thus grips the inner circumferential surface of the hole, and particularly relates to such a clamping device that is adapted so that, in the vicinity of a scraper, no clearance occurs between the gripping assembly and a clamp rod, and the scraper. The clamping device is capable of enhancing the durability of a scraper, reducing the amount of pressurized air consumed by blowing, and ensuring the strength of a clamp rod against pulling and so on.