Tool Retaining Plate Locking Structure for Stable Sleeve Positioning
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Solution Overview
Problem
Existing tool retaining systems face issues with instability and looseness due to limited contact points between round or square columns and square slots, leading to dimensional errors affecting tightness and ease of assembly.
Innovation Solution
A tool retaining plate with diagonally configured locking portions and positioning bulges in a notched pattern, reducing friction area and resistance, allowing for smoother rotation and locking, and accommodating compatibility errors for enhanced stability and ease of assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a round column is used for sleeving into the square slot, then the structure is simple and easy to manufacture, but there are only four contact points leading to looseness and instability
Solution Approach 1:
The invention divides the column structure into multiple segments (multiple columns instead of a single round column) to increase contact points with the square slot, thereby improving stability while maintaining manufacturing simplicity
Solution Approach 2:
The invention uses square columns instead of round columns to match the square slot geometry, creating asymmetric contact surfaces that provide better mating and stability while remaining easy to manufacture
2Stability of the object's composition
If a square column is used for sleeving into the square slot, then the mating tightness can be controlled, but dimensional errors affect the tightness of sleeve assembly
Solution Approach 1:
The invention uses multiple square columns distributed around the perimeter, which segments the contact interface and provides multiple points of contact. This reduces the impact of individual dimensional errors on overall mating tightness
Solution Approach 2:
The invention changes the geometric parameters by using multiple columns with specific spacing and dimensions, allowing for tolerance compensation and reduced sensitivity to manufacturing variations
3Stability of the object's composition
If the locking portions are configured to provide tight mating, then stability is improved, but it becomes inconvenient for users to take or position the sleeve
Solution Approach 1:
The invention uses notched locking portions that engage partially with the sleeve, providing sufficient stability through strategic contact points while leaving enough clearance for easy insertion and removal by users
4Stability of the object's composition
If the friction area between column and slot is increased, then mating tightness is improved, but rotation and locking become difficult
Solution Approach 1:
The invention segments the contact interface into multiple discrete contact points through multiple columns and notched locking portions, providing sufficient mating tightness while maintaining rotation ease through reduced continuous friction area
Solution Approach 2:
The invention applies different surface qualities to different parts: the column surfaces provide point contact for tight mating, while the notched locking portions provide controlled friction areas that allow smooth rotation during assembly
Data Source
AI summary
A tool retaining plate has a disc base with a holding surface and a mounting surface. Sets of sleeving columns are configured at interval on the mounting surface and are of an octagonal columnar pattern to define a column head end, a column foot end and a circumferential portion. Four abutting surfaces and four locking surfaces are cross connected at the circumferential portion, and an angular locking portion is formed between the abutting surface and locking surface. Positioning bulges are protruded externally onto two opposite abutting surfaces of the circumferential portion of the sleeving column, opposite to the positioning flanges of the sleeve. This enables engagement with the positioning flanges on the slot wall of the square slot of the sleeve. Two locking portions configured diagonally and set adjacent to the abutting surface with positioning bulges are set into a notched pattern or offset towards the abutting surface.