Rotating Machining Device Tripper Pin Internalization

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional tool feed systems in rotating machining devices, such as pipe lathes, expose operators to dangerous pinch points and require time-consuming adjustments, posing safety hazards and inefficiencies when accommodating different pipe sizes.

Innovation Solution

A tool feed system with a tripper pin assembly mounted on a support housing, positioned to collide with the feed mechanism inside the headstock, eliminating external pinch points and allowing adjustable tool module positioning without repositioning the tripper pin assembly, with gear connections internalized to prevent operator injury.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the tripper pin assembly is mounted on a radially protruding tower for conventional tool slide repositioning, then the tool slide can accommodate different pipe sizes, but the operator is exposed to dangerous pinch points between the tripper pin assembly and tripper sprocket

Engineering Contradiction:

Improveaccommodation of different pipe sizesVSAvoidoperator exposure to pinch points

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The patent inverts the conventional arrangement by moving the tripper pin assembly from an external radially protruding tower to an internal position within the headstock. This inversion eliminates the external pinch points while maintaining the feed mechanism's functionality for accommodating different pipe sizes through internal tool module repositioning

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The tripper pin assembly is nested within the headstock structure rather than protruding externally. The feed mechanism and tripper pin assembly are integrated inside the headstock, creating a nested configuration that eliminates external hazardous areas while preserving the mechanical feed function

Inventive Principle:

Principle #7Nested doll (Nesting)

2Adaptability or versatility

If the operator repositions the tripper pin assembly on the tower to correspond with the tripper sprocket for different pipe sizes, then the feed mechanism can accommodate varying radial positions, but the process is time consuming and inconvenient

Engineering Contradiction:

Improveadjustment to different radial positionsVSAvoidtime required for repositioning adjustments

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The patent extracts the tripper pin assembly from the adjustable tower mechanism and integrates it directly into the headstock structure. This eliminates the need for separate repositioning of the tripper pin assembly when adjusting for different pipe sizes, as the tool module can be repositioned independently while the tripper pin remains fixed in its optimal position within the headstock

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The headstock structure serves multiple functions: it houses the tripper pin assembly, supports the tool module, and provides the structural framework for the feed mechanism. This multi-functional integration eliminates the need for separate adjustment mechanisms and reduces the number of components requiring repositioning

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Ease of operation

If the tripper pin assembly is mounted on an external tower, then the feed mechanism can be accessed and adjusted, but the operator is exposed to additional hazards from external gear connections between the drive gear and gear ring

Engineering Contradiction:

Improveaccessibility of feed mechanismVSAvoidoperator exposure to external gear pinch points

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The drive gear and gear ring are nested within the headstock structure rather than being mounted externally on the tower. This internalization of the gear connections eliminates external pinch points while the feed mechanism remains accessible through the tool module interface, which can be adjusted radially to accommodate different pipe sizes

Inventive Principle:

Principle #7Nested doll (Nesting)

Data Source

PatentEP3057730B1Rotating machining device

Publication Date: 2020.07.08 TRI TOOL INC

Figure 1
Figure 2~3
Figure 4~5

AI summary

A rotating machining device for machining a work piece includes a support housing adapted to be mounted on the work piece and a headstock rotatably mounted on the support housing. At least one tool module is mounted to the headstock and includes a tool feed system having a tool holder and a feed mechanism operatively connected to the tool holder. A tripper pin assembly is mounted on the support housing and arranged to collide with the feed mechanism for advancement of the tool holder relative to the work piece. The feed mechanism collides with the tripper pin assembly at a collision point radially positioned inside of an outer diameter of the headstock.