Composite Nut Structure for Electric Pushing Rods With Lower Friction
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Solution Overview
Problem
Existing nut structures for electric pushing rods face issues with strength, noise, and heat generation due to friction between the guide screw and nut, with metal nuts generating noise and heat and plastic nuts being prone to breakage and thread stripping.
Innovation Solution
A nut structure comprising a metal cylinder with an inner thread and a plastic intermediate component with a fixed and driving side thread, positioned between the metal cylinder's inner and guide screw's outer threads, utilizing positioning grooves and blockers to prevent rotation and shaking, enhancing strength and reducing noise and heat.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the nut structure is made of metal to enhance strength, then the strength is improved, but noise and heat are easily generated by friction between the guide screw and the nut structure
Solution Approach 1:
The patent uses a composite structure combining metal and plastic materials. The metal cylinder provides structural strength and thread engagement, while the plastic intermediate component reduces friction between the guide screw and nut structure. This composite approach resolves the contradiction by allowing the metal portion to bear mechanical loads while the plastic portion minimizes harmful friction effects during operation.
2Object-generated harmful factors
If the nut structure is made of plastic to reduce noise and heat, then noise and heat are reduced, but the nut structure tends to be broken and the inner thread tends to get stripped
Solution Approach 1:
The patent employs a composite design where the metal cylinder provides the necessary strength and thread engagement capability, while the plastic intermediate component is positioned to reduce friction. The metal portion specifically engages with the inner thread to prevent stripping, while the plastic portion contacts the guide screw to minimize noise and heat generation.
3Productivity
If the guide screw operates frequently to increase productivity, then the operatable times increase, but the guide screw generates more noise and heat resulting from friction
Solution Approach 1:
The composite structure with plastic intermediate component enables frequent operation by reducing friction between the guide screw and nut structure. The plastic material's low friction coefficient allows the guide screw to operate repeatedly with minimal heat generation and noise, thereby increasing operatable times without exacerbating harmful friction effects.
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 increases the operational times of the guide screw by enhancing the nut's strength and reducing noise and heat, while preventing thread stripping and breakage.
Implementation Method 1
noise and heat generated by the operation of a guide screw may be effectively reduced
Data Source
AI summary
The disclosure is a nut structure for an electric pushing rod. The electric pushing rod has a guide screw (A) with an outer thread (A1). The nut structure includes a metal cylinder (10) and a plastic intermediate component (20). The metal cylinder (10) has a pivot hole (11) being passed through by the guide screw (A). An inner wall of the pivot (11) is provided with an inner thread (12). The plastic intermediate component (20) covers the inner thread (12) and is disposed of between the outer thread (A1) and the inner thread (12). The plastic intermediate component (20) includes a fixed side thread (21) mounted on the inner thread (12) and a driving side thread (22) screwed with the outer thread (A1). Therefore, the strength may be enhanced to avoid both the nut structure from being broken and the driving side thread (22) from getting stripped.