Overload Clutch Segmented Housing Interlock

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Solution Overview

Problem

Existing overload clutches face mechanical strength issues due to the release of the housing body from the housing cover when an overload force exceeds the retaining force of the detent arms, leading to potential damage in drive apparatus components.

Innovation Solution

The design incorporates engagement elements on the housing body that radially inwardly extend and interact with radially outwardly positioned retaining structures on the housing cover, allowing for a strong interlocking connection that prevents release during overloads, along with a spring element to facilitate disengagement and a claw configuration for enhanced mechanical strength.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If detent arms are used to retain the housing body in the housing cover, then the clutch elements can be brought into engagement, but the housing body is released when overload force exceeds the retaining force of the detent arms

Engineering Contradiction:
Improveconnection reliabilityVSAvoidmechanical strength
Core Design Contradiction:
ReliabilityVSStrength

Solution Approach 1:

The connection between housing body and housing cover is segmented into multiple engagement elements distributed around the circumference, where each engagement element independently contributes to the overall retaining force, preventing release even if one element fails under overload

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The engagement elements are formed as an integral part of the housing body structure, creating a composite connection system that combines the structural integrity of the housing body with the retaining function of the engagement elements, significantly increasing mechanical strength beyond simple detent arms

Inventive Principle:
Principle #40Composite materials

2Adaptability or versatility

If the housing body is released from the housing cover during overload, then the clutch elements can decouple, but the connection between housing body and housing cover is insufficient

Engineering Contradiction:
Improveoverload protectionVSAvoidconnection strength
Core Design Contradiction:
Adaptability or versatilityVSStrength

Solution Approach 1:

The engagement elements are designed with controlled flexibility to allow dynamic response to overload conditions - they maintain strong connection during normal operation but can selectively disengage when excessive force is applied, providing both strength and overload protection

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The engagement elements extend radially inwardly from the housing body, creating a three-dimensional interlocking structure with the housing cover that provides superior mechanical strength compared to simple axial detent arm retention

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

3Strength

If multiple engagement elements are used to strengthen the connection, then mechanical strength increases, but the device complexity increases

Engineering Contradiction:
Improveconnection strengthVSAvoidhousing structure complexity
Core Design Contradiction:
StrengthVSDevice complexity

Solution Approach 1:

The engagement elements are merged with the housing body as an integral structure, eliminating the need for separate components and reducing assembly complexity while maintaining the strength benefits of multiple engagement points

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The engagement elements serve multiple functions simultaneously: they provide mechanical strength for connection, enable overload protection through controlled disengagement, and simplify the housing structure by being integrally formed with the housing body

Inventive Principle:
Principle #6Universality (Multi-functionality)

Data Source

PatentUS11022188B2Overload clutch
Publication Date: 2021.06.01 TESLA INC
  • US11022188B2 patent drawing
  • US11022188B2 patent drawing
  • US11022188B2 patent drawing

AI summary

The disclosure relates to an overload clutch, comprising a cylindrical clutch housing having a housing body and a housing cover, and comprising two clutch elements arranged within the clutch housing, via which a drive movement is transmissible in an engaged state, wherein the clutch elements, for transmitting the drive movement in the engaged state, are engaged with each other in an interlocking and/or frictional manner and, can be brought out of engagement when an overload occurs. The housing body comprises a plurality of engagement elements, and the housing cover comprises a plurality of retaining structures corresponding to the engagement elements, wherein the engagement elements are able to be brought into engagement with the retaining structures by rotating the housing cover relative to the housing body.