Segmented Clamp Mechanism for Detachable Tip
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Solution Overview
Problem
Existing clamp mechanisms for detachable tips are complex, costly, and prone to tip body destruction due to complicated shapes and structures, making them difficult to attach and detach without losing the clamp member and compromising tip strength.
Innovation Solution
A clamp mechanism with a head portion of the clamp member having a circular section that can pass through a minimally cut fitting hole in the tip body, allowing the clamp member to advance and retreat without separating from the tool body, using a circular contact portion to secure the tip body and simplify the attachment and detachment process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the clamp member is completely detached from the tool body when the tip is detached, then the tip can be removed, but the detachment work becomes troublesome and the clamp member may be lost
Solution Approach 1:
The clamp member is segmented into a head portion and a shaft portion that can move relative to each other. The shaft portion can be detached from the tool body while the head portion remains, allowing the tip to be removed without completely detaching the clamp member. This resolves the contradiction by enabling tip detachment while preventing loss of the clamp member.
Solution Approach 2:
The shaft portion is nested within the head portion, allowing the shaft to be withdrawn while the head remains on the tool body. This nested structure enables selective detachment of only the necessary component (shaft) while retaining the clamp member's main body, solving the problem of troublesome detachment work and potential loss.
2Force
If the outer diameter of the head portion is set larger than the inner diameter of the fitting hole, then the head portion can press the opening of the fitting hole to clamp the tip, but the head portion cannot pass through the fitting hole for attachment
Solution Approach 1:
The clamp member is divided into a head portion and a shaft portion with different diameter requirements. The shaft portion has a smaller diameter to pass through the fitting hole during attachment, while the head portion has a larger diameter to provide effective clamping force. This segmentation resolves the contradiction between needing large clamping force and needing to pass through the fitting hole.
Solution Approach 2:
The solution moves the clamping function from the shaft portion to the head portion in a different spatial dimension. The shaft passes through the fitting hole while the head, positioned at the end of the shaft, performs the clamping action on the opposite side of the tip. This dimensional separation allows both functions to coexist without conflict.
3Ease of operation
If a non-circular section with protrusion is used in the head portion, then the clamp member can advance and retreat without rotating, but the shape becomes complicated and costs increase
Solution Approach 1:
Instead of making the head portion non-circular to prevent rotation (as in conventional designs), this invention uses a circular head portion and prevents rotation through the tilted screw hole configuration. This inversion of the conventional approach simplifies the head portion shape while achieving the same functional result of controlled advancement and retreat.
Solution Approach 2:
The tilted screw hole acts as an intermediary mechanism that converts rotational motion into linear advancement/retreat motion. By tilting the screw hole relative to the central axis, the clamp member is forced to advance or retreat along the central axis when the screw is rotated, eliminating the need for complex non-circular head shapes to control rotation.
4Strength
If the fitting hole is minimally cut to preserve tip body strength, then the tip body remains strong, but the head portion cannot pass through for attachment
Solution Approach 1:
The clamp member is segmented into a head portion and a shaft portion with different diameter requirements. The shaft portion has a smaller diameter designed to pass through the minimally cut fitting hole, while the head portion has a larger diameter for effective clamping. This segmentation allows the fitting hole to be minimally cut to preserve tip strength while still enabling attachment.
Solution Approach 2:
Different parts of the clamp member have different local qualities in terms of diameter. The shaft portion is locally optimized to have a small diameter for passing through the fitting hole, while the head portion is locally optimized to have a large diameter for clamping. This local differentiation resolves the contradiction between minimal cutting for strength and passage capability.
Data Source
AI summary
The present invention relates to a clamp mechanism which prevents a tip body from being greatly cut out by a fitting hole to secure strength of a tip without complicating the shape of a head portion of a clamp member or a fitting hole of a tip body. There is provided a clamp mechanism of a tip for pressing the tip, in which a fitting hole is formed through a tip body, by the use of a clamp member having a shaft portion inserted into the fitting hole and a head portion with an outer diameter equal to or larger than that of the shaft portion and thus clamping the tip to a tip fitting seat. In the clamp member, a section, which is perpendicular to the central axis line, of the back surface of the head portion has a circle shape centered at the central axis line. In the tip body of the tip, the head portion of the clamp member can pass through the fitting hole, and a contact portion with which a part of the back surface of the head portion comes in contact at the time of advancing the clamp member is formed in an opening of the fitting hole.