Deflection Nut Structure to Prevent Rotation and Tightening Shock
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Solution Overview
Problem
Existing nuts used to secure components in vehicles are difficult to remove without causing damage or unwanted noise, and can rotate during tightening, potentially leading to shock and damage.
Innovation Solution
A deflection nut with a flange and body part connected by elastic connecting straps, featuring a protrusion and insertion recess, and optionally ribs and bulges, to ensure stability and prevent rotation during screwing and facilitate easy disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a conventional nut is used to secure components, then the fastening function is achieved, but the nut rotates during tightening causing shock and potential damage
Solution Approach 1:
The connecting straps are designed with elastic deformation capability, allowing them to flex and absorb the dynamic forces generated during screw tightening. This elasticity transforms the rigid nut into a dynamic structure that can accommodate tightening forces without generating harmful shocks, while still maintaining secure fastening.
Solution Approach 2:
The elastic connecting straps act as pre-designed cushioning elements that absorb and dissipate the shock forces before they can propagate to damage the nut or surrounding components. The straps are engineered to deform elastically under load, providing built-in protection against the harmful effects of tightening shocks.
2Ease of operation
If a conventional nut is used, then fastening is achieved, but removal is difficult and may cause damage or noise
Solution Approach 1:
The elastic connecting straps provide dynamic flexibility that allows the nut to be easily removed by simply pulling it away from the mounting surface. The straps can deform to accommodate removal forces without causing damage, and their elastic nature prevents the generation of harmful noise during the disassembly process.
3Strength
If the nut is made rigid for stability, then fastening strength is improved, but shock during tightening increases
Solution Approach 1:
The nut employs a hybrid structure where the collar and body parts maintain rigidity for secure fastening, while the connecting straps between them are designed with elastic flexibility. This local differentiation of mechanical properties allows the rigid portions to provide fastening strength while the flexible straps absorb shock forces, resolving the contradiction between strength and flexibility.
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 deflection nut provides stable fastening, prevents shocks during tightening, and allows easy disassembly without damage or noise, ensuring secure and reliable attachment and detachment of components.
Implementation Method 1
two opposite connecting straps having an elastic deformation towards the outside
Data Source
Figure 1~2
Figure 3~4
Figure 5~6A
AI summary
A deflection nut (100), comprising a flange (120) serving as a contact surface and a body part (160), the flange and the body part are connected to each other by two opposing connecting straps (140) having elastic deformation outward, the nut is provided with a screw passage (150) having a first fixing hole (122) in the central part of the flange and a second fixing hole (162) in the body part. A protrusion (124) projecting toward the body part is formed on a surface of the flange, and an insertion recess into which the protrusion is inserted is formed in the body part; Alternatively, a protrusion (124) projecting toward a surface of the flange is formed in the body part, and an insertion recess into which the protrusion is inserted is formed in the surface of the flange.