Guide Bush Spindle Sealing for Simplified Switching

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Solution Overview

Problem

Conventional processing machines require complex processes for switching between using and removing a guide bush, complicating the selection of processing with or without a guide bush.

Innovation Solution

A processing machine design that includes a main spindle cover and a seal member to seal the space between the guide bush attachment hole and the main spindle, allowing for easy selection of processing with or without a guide bush by moving the main spindle into or out of the guide bush attachment hole, and using a seal member to prevent debris from entering the rear side.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a guide bush is removed to enable processing without it, then processing flexibility is improved, but a complicated process of attaching and removing a cover member is required

Engineering Contradiction:
Improveprocessing flexibilityVSAvoidcomplicated process of attaching and removing cover member
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The invention extracts the sealing function from a separate cover member and integrates it into the guide bush attachment hole structure itself. The guide bush attachment hole is designed with a sealing surface that directly seals when the guide bush is removed, eliminating the need for a separate cover member and simplifying the process while maintaining processing flexibility

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The invention merges the sealing function with the guide bush attachment hole structure. The sealing surface is formed as an integral part of the attachment hole, combining the mounting interface and sealing interface into a single structure, thereby eliminating the need for separate cover members and reducing operational complexity

Inventive Principle:
Principle #5Merging (Combining)

2Object-affected harmful factors

If a cover member is attached to fill the space when guide bush is removed, then debris prevention is improved, but the switching process becomes more complicated

Engineering Contradiction:
Improvedebris preventionVSAvoidswitching process complexity
Core Design Contradiction:
Object-affected harmful factorsVSEase of operation

Solution Approach 1:

The invention extracts the sealing function from a separate cover member and integrates it into the guide bush attachment hole structure. The guide bush attachment hole is designed with a sealing surface that directly seals when the guide bush is removed, eliminating the need for a separate cover member and simplifying the process while maintaining processing flexibility

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The guide bush attachment hole structure provides self-sealing functionality. When the guide bush is removed, the sealing surface automatically seals the space without requiring any additional cover member attachment, making the system self-sufficient and eliminating complicated switching operations

Inventive Principle:
Principle #25Self-service

Data Source

PatentEP2832476B1Processing equipment
Publication Date: 2023.08.30 CITIZEN MASCH CO LTD
  • EP2832476B1 patent drawingFigure 1
  • EP2832476B1 patent drawingFigure 2
  • EP2832476B1 patent drawingFigure 3

AI summary

A main spindle (11) is moved to a region of a rotary guide bush device (30) where the rotary guide bush device (30) has been attached to be disposed in a position of a front (F) along an axis (C) direction when the rotary guide bush device (30) having a guide bush (31) (guide bush), which is supported in a removable manner by a guide bush-supporting base (20) (supporting base) provided in the front (F) along the axis (C) direction of the main spindle (11), is removed, and a seal member (60) fixed to the guide bush-supporting base (20) has contact with an outer circumference surface (12a) of a main spindle cover (12) over an entire circumference, so that processing with or without the guide bush can be selected and a complicated process required for switching the processing with or without the guide bush can be simplified.