Deformable Locking Sleeve for Multi-Diameter Rod Fixing
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Solution Overview
Problem
Current mechanical fixing mechanisms cannot simultaneously fix multiple rods of different thicknesses in a small space, as they are designed to handle each rod separately and lack the capability to accommodate varying sizes effectively.
Innovation Solution
A locking device featuring an outer sleeve with deformable pressing blocks and a trapezoidal ejector block, where a set screw compresses the blocks to securely hold rods of different sizes, and smooth shaft passage holes prevent the device from tipping, allowing for flexible adjustment and linear motion of the rods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple rods of different thicknesses are fixed using conventional pressing methods (set screw or pressing plate), then each rod can be fixed individually, but they cannot be fixed simultaneously in a small space
Solution Approach 1:
The locking unit is divided into multiple pressing blocks (first pressing block, second pressing block, third pressing block) that can independently press different rods. Each pressing block has its own pressing surface that contacts a specific rod, allowing simultaneous fixation of multiple rods with different thicknesses through segmented pressing action
Solution Approach 2:
The locking unit is nested within the outer sleeve, and the multiple pressing blocks are arranged in a compact configuration where they share a common deformation mechanism. The first, second, and third pressing blocks are positioned at different angular locations around the outer sleeve, creating a nested arrangement that maximizes the number of rods that can be fixed in a limited space
2Quantity of substance
If a deformable locking unit is used to press multiple rods simultaneously, then multiple rods can be fixed in a small space, but the pressing force distribution may be inconsistent
Solution Approach 1:
Each pressing block is designed with specific local properties: the first pressing block has a first pressing surface, the second pressing block has a second pressing surface, and the third pressing block has a third pressing surface. Each pressing surface is locally optimized to contact and press a specific rod, ensuring that the pressing force is appropriately distributed to each rod according to its specific requirements
Solution Approach 2:
The locking unit is designed to be deformable, allowing it to dynamically adjust its shape when pressed by the set screw. This deformation enables the pressing blocks to adapt to rods of different thicknesses while maintaining consistent pressing force distribution through the shared elastic deformation mechanism of the locking unit
3Reliability
If rods are fixed with high pressing force to ensure stability, then the locking effect is improved, but the rods cannot be adjusted or replaced flexibly
Solution Approach 1:
The locking unit utilizes the elastic deformation of itself as the locking mechanism. When the set screw presses the locking unit, the elastic deformation automatically generates the pressing force needed to secure the rods. When the set screw is loosened, the elastic recovery automatically releases the pressing force, allowing easy adjustment or replacement of rods without requiring additional unlocking mechanisms
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 device effectively secures multiple rods of varying sizes within a compact space by ensuring consistent pressing force across all rods, allowing for flexible adjustment and stable linear motion, while preventing the device from overturning.
Implementation Method 1
the locking unit deforms and drives the pressing blocks to tightly press rods mounted in the respective rod locking holes at the same time
Implementation Method 2
an inner wall of the outer sleeve is provided with a wedge block to be inserted into the sharp groove
Implementation Method 3
where one rod is used to push and pull the remaining multiple rods via a locking device to perform a linear motion, and since the support of the smooth shafts makes the locking unit not overturn
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
Disclosed is a locking device, comprising an outer sleeve (1) and at least one locking unit (2) located in the outer sleeve (1), wherein the locking unit (2) is formed by connecting a plurality of pressing blocks (3), a gap (5) is provided between two adjacent ones of pressing blocks (3), a rod locking hole (6) is provided in the gap (5), and a set screw hole (7) is provided on the outer sleeve (1) at a position corresponding to the locking unit (2); and when a set screw is screwed into the set screw hole (7) to directly or indirectly press the locking unit (2), the locking unit (2) deforms and drives the pressing blocks (3) to tightly press rods (8, 9) mounted in the respective rod locking holes (6) at the same time.