McPherson Strut Spring Compression Apparatus with Pivotable Crown

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Solution Overview

Problem

Existing strut spring compression apparatuses lack the capability to efficiently disassemble and reassemble McPherson type strut assemblies, particularly those with laterally-displaceable, cooperative, pivotable helix-channeling structures and pivotable crown structures for accommodating variously constructed strut assemblies with angled spring seats.

Innovation Solution

A spring-compression apparatus featuring a guide member, carriage assembly, and spring-engagement assembly with laterally displaceable helix-engaging channels and a pivotable crown structure, enabling the apparatus to securely compress and decompress McPherson type strut assemblies, including those with variably pitched and torsioned springs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a traditional strut spring compression apparatus is used, then the apparatus structure is simple, but it cannot accommodate various strut spring configurations and orientations

Engineering Contradiction:
Improvecapability to accommodate various strut spring configurationsVSAvoidapparatus structure complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent employs dynamically adjustable components including a pivotable crown structure that can rotate to match different spring seat angles, and laterally-displaceable helix-channeling structures that can move to engage springs of various orientations. These dynamic elements allow the apparatus to adapt to different strut spring configurations without requiring multiple specialized devices.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The apparatus integrates multiple functions into a single device: the crown structure serves both as a positioning element and an angular adjustment mechanism, while the helix-channeling structures provide both lateral displacement capability and spring engagement. This multi-functionality enables the apparatus to handle various strut spring types and orientations, eliminating the need for separate specialized tools.

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

2Reliability

If the apparatus includes pivotable crown structure and laterally-displaceable helix-channeling structures, then it can securely engage various spring configurations, but the device complexity increases

Engineering Contradiction:
Improvesecure engagement of springVSAvoidapparatus structure
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The apparatus is divided into distinct functional segments: the crown structure as a separate pivotable component for angular adjustment, and the helix-channeling structures as laterally-displaceable elements for spring engagement. This segmentation allows each component to be optimized for its specific function while maintaining overall system reliability through modular coordination.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The crown structure acts as an intermediary element between the apparatus frame and the strut spring, providing angular adaptation. The helix-channeling structures serve as intermediaries between the compression mechanism and the spring, enabling lateral adjustment to securely engage springs of various orientations. These intermediary components mediate the interaction to ensure reliable engagement across different configurations.

Inventive Principle:
Principle #24Intermediary (Mediator)

3Productivity

If the apparatus uses fixed engagement structures, then the device is simpler, but it cannot efficiently disassemble and reassemble strut assemblies of various designs

Engineering Contradiction:
Improvedisassembly and reassembly efficiencyVSAvoidengagement structure complexity
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The pivotable crown structure and laterally-displaceable helix-channeling structures enable rapid adaptation to different strut spring configurations, allowing efficient disassembly and reassembly of various designs. The dynamic adjustment capabilities eliminate the need for multiple specialized tools, improving productivity through a single versatile apparatus.

Inventive Principle:
Principle #15Dynamics

4Reliability

If the apparatus includes safety mechanisms for safe spring compression, then operator safety is improved, but the apparatus complexity increases

Engineering Contradiction:
Improvesafe spring compressionVSAvoidapparatus structure
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The apparatus incorporates preliminary safety mechanisms that are activated before spring compression begins. The pivotable crown structure and helix-channeling structures are pre-positioned to ensure proper engagement and alignment, preventing unsafe conditions during compression. Safety features are integrated into the fundamental structure rather than added as separate complex systems.

Inventive Principle:
Principle #10Preliminary action

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

Facilitates quick and efficient disassembly and reassembly of McPherson type strut assemblies by securely compressing and decompressing the strut springs, allowing for safe removal of mounting nuts and accommodating various strut designs and orientations.

Implementation Method 1

a jack assembly (40) and a slide assembly (50). The jack assembly comprises a jack (41), certain jack extension means (42), and certain jack release means (44)

Methodology Applied
Scientific EffectMechanical Force: Mechanical Force

Implementation Method 2

first and second laterally disposed shaft-mounted extension arms (81), a screw mechanism (82) disposed between the extension arms, and first and second helix-engaging or coil-engaging channel structures (83)

Methodology Applied
Scientific EffectPivoting: Hinge

Implementation Method 3

second ends of the extension arms (81) are screw-mounted to the screw mechanism (82), and the screw mechanism (82) is cooperably associated with the guide member (20)

Methodology Applied
Scientific EffectScrew mechanism: Screw

Data Source

PatentUS7814629B2Strut spring compression apparatus
Publication Date: 2010.10.19 UZUN ISMET
  • US7814629B2 patent drawing
  • US7814629B2 patent drawing
  • US7814629B2 patent drawing

AI summary

A spring-compression apparatus for facilitating maintenance of a strut assembly comprises a guide member, a carriage assembly, and a spring-channeling assembly. The guide member comprises a first member end and a second member end. The carriage assembly comprises a jack assembly and a slide assembly. The jack assembly is operable to otherwise displace the slide assembly along the guide member. The slide assembly comprises a locator assembly, which comprises a locator extension arm and a pivotable strut end interface. A strut spring is receivable in the spring channeling assembly as laterally engaged therewith. The strut end interface is engageable with a strut end for compressing the strut spring. The locator assembly further enables a user to remove a mounting nut from the interface-engaged end when the strut spring is compressed, thus enabling strut assembly disassembly.