Dual Expanding Structure for Uniform Cylinder Internal Unit Expansion
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Solution Overview
Problem
Existing expanding structures for underwater products are prone to uneven stress, leading to screw sticking and are difficult to assemble and disassemble, thereby affecting operation efficiency.
Innovation Solution
A dual-expanding structure comprising a first expanding structure at the end and a second expanding structure on the side wall of the internal unit, with coordinated assemblies that ensure uniform expansion, easy assembly, and disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing expanding structure is used with symmetric arrangement at two ends, then expanding function is provided, but uneven stress occurs during expansion process causing screw sticking
Solution Approach 1:
The expanding structure is segmented into two distinct parts: a first expanding structure at the end face and a second expanding structure on the side wall. This segmentation allows different expansion paths to be applied independently, preventing uneven stress concentration that causes screw sticking while maintaining reliable expansion function.
2Reliability
If existing expanding structure is used, then expanding function is provided, but assembly and disassembly become difficult
Solution Approach 1:
The expanding structure utilizes dynamic mechanical components including inclined surfaces that convert rotational screw motion into radial expansion motion, and slide blocks that move along guide rails. This dynamic design enables easy assembly and disassembly through simple screw operations while maintaining reliable expansion function.
Solution Approach 2:
Slide blocks serve as intermediary components between the compression screw and the press block. These intermediaries translate the axial compression force into radial expansion force through the inclined surface, simplifying the assembly process while ensuring reliable expansion.
3Reliability
If existing expanding structure is used, then expanding function is provided, but operation efficiency decreases
Solution Approach 1:
The expanding structure is pre-assembled with all components (base, press blocks, slide blocks, compression screws) positioned and configured before installation. This preliminary preparation enables quick installation and operation, improving efficiency while maintaining reliable expansion function.
Solution Approach 2:
The dynamic mechanism using inclined surfaces and slide blocks allows rapid expansion through simple rotational input, significantly improving operation efficiency compared to static expansion methods while ensuring reliable function.
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 dual-expanding structure prevents screw sticking and facilitates easy assembly and disassembly, enhancing operation efficiency by ensuring uniform expansion and mechanical strength.
Implementation Method 1
The press block includes a first inclined surface, and the first inclined surface is a contact surface of the press block contacting with the slide block
Data Source
AI summary
An expanding structure for a cylinder internal unit and a cylinder internal unit are provided. The expanding structure includes a first expanding structure arranged at an end of an internal unit and a second expanding structure arranged on a side wall of the internal unit. The first expanding structure includes a plurality of first expanding assemblies arranged at intervals in a circumferential direction of the base. The second expanding structure includes a plurality of second expanding assemblies arranged at intervals in a circumferential direction of the internal unit. With coordination of the first expanding structure and the second expanding structure, strength required for expanding can be achieved, and uniform expansion of the end and the side wall of the internal unit can be achieved in the expanding process. The expanding structure is easy to be assembled and disassembled, the operation is simple, and operation efficiency is effectively improved.