Dual-Sequence Tooth Body for Quiet Overload Blocking

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Solution Overview

Problem

Existing double tooth systems in furniture fittings and pull-out devices face challenges in achieving a high degree of smooth running and reliability, with noise and engagement issues due to the offset arrangement of teeth sequences.

Innovation Solution

The teeth of the first sequence are larger and engage permanently, while the smaller teeth of the second sequence run idle during normal operation, contacting only during abnormal forces to ensure the blocking function, with the first sequence having a softer casing and second sequence being harder for reduced noise and enhanced blocking.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the teeth of both sequences are arranged offset and both engage during normal operation, then the blocking function is ensured, but noise level increases and smooth running deteriorates

Engineering Contradiction:
Improveblocking functionVSAvoidnoise level
Core Design Contradiction:
ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The tooth-bearing body is segmented into two distinct sequences of teeth with different functions: the first sequence (larger teeth) handles normal operational engagement, while the second sequence (smaller teeth) is reserved exclusively for blocking functions during overload conditions. This segmentation allows each sequence to be optimized for its specific purpose, reducing noise during normal operation while maintaining reliability for blocking.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Different local qualities are assigned to the two sequences: the first sequence features larger teeth with softer tooth casings for smooth, quiet engagement during normal operation, while the second sequence has smaller, harder teeth positioned to engage only under overload conditions for blocking. This local differentiation resolves the contradiction by making each sequence specialized for its function.

Inventive Principle:
Principle #3Local quality

2Reliability

If both sequences of teeth engage during normal operation, then the blocking function is ensured, but smooth running deteriorates

Engineering Contradiction:
Improveblocking functionVSAvoidsmooth running
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The tooth-bearing body is segmented into two distinct sequences of teeth with different functions: the first sequence (larger teeth) handles normal operational engagement, while the second sequence (smaller teeth) is reserved exclusively for blocking functions during overload conditions. This segmentation allows each sequence to be optimized for its specific purpose, reducing noise during normal operation while maintaining reliability for blocking.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Different local qualities are assigned to the two sequences: the first sequence features larger teeth with softer tooth casings for smooth, quiet engagement during normal operation, while the second sequence has smaller, harder teeth positioned to engage only under overload conditions for blocking. This local differentiation resolves the contradiction by making each sequence specialized for its function.

Inventive Principle:
Principle #3Local quality

3Object-affected harmful factors

If the teeth of the second sequence are made softer to reduce noise, then noise level decreases, but the blocking function deteriorates

Engineering Contradiction:
Improvenoise levelVSAvoidblocking function
Core Design Contradiction:
Object-affected harmful factorsVSReliability

Solution Approach 1:

Different local qualities are assigned to the two sequences: the first sequence features larger teeth with softer tooth casings for smooth, quiet engagement during normal operation, while the second sequence has smaller, harder teeth positioned to engage only under overload conditions for blocking. This local differentiation resolves the contradiction by making each sequence specialized for its function.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The tooth-bearing body is segmented into two distinct sequences of teeth with different functions: the first sequence (larger teeth) handles normal operational engagement, while the second sequence (smaller teeth) is reserved exclusively for blocking functions during overload conditions. This segmentation allows each sequence to be optimized for its specific purpose, reducing noise during normal operation while maintaining reliability for blocking.

Inventive Principle:
Principle #1Segmentation

4Strength

If the teeth of the first sequence are made harder to increase strength, then strength increases, but noise level increases

Engineering Contradiction:
Improvetooth strengthVSAvoidnoise level
Core Design Contradiction:
StrengthVSObject-affected harmful factors

Solution Approach 1:

Different local qualities are assigned to the two sequences: the first sequence features larger teeth with softer tooth casings for smooth, quiet engagement during normal operation, while the second sequence has smaller, harder teeth positioned to engage only under overload conditions for blocking. This local differentiation resolves the contradiction by making each sequence specialized for its function.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The teeth of the first sequence are constructed as composite structures with a tooth core and a tooth casing made of different materials with different hardness levels. The softer tooth casing reduces noise during engagement while the underlying tooth core provides structural strength, resolving the contradiction between strength and noise.

Inventive Principle:
Principle #40Composite materials

Data Source

PatentUS9243662B2Tooth-bearing body
Publication Date: 2016.01.26 FULTERER GES
  • US9243662B2 patent drawing
  • US9243662B2 patent drawing
  • US9243662B2 patent drawing

AI summary

A tooth-bearing body having a first sequence (1) of teeth (2) and at least one second sequence (3) of teeth (4), wherein the teeth (2) of the first sequence (1), viewed in a rolling direction (5) of the tooth-bearing body, are arranged behind one another and the teeth (4) of the second sequence (3), viewed in the rolling direction (5) of the tooth-bearing body, are likewise arranged behind one another, and the first sequence (1) of teeth (2) and the second sequence (3) of teeth (4) are arranged in a transverse direction (6) orthogonal to the rolling direction (5), particularly exclusively next to one another, wherein the teeth (2) of the first sequence (1) are larger than the teeth (4) of the second sequence (3).