Lockable Tool Clamp Pin Mechanism Against Tool Holder Ejection
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Solution Overview
Problem
Existing tool clamp structures fail to prevent unintentional opening and ejection of tool holders due to external forces, posing safety risks during machining operations.
Innovation Solution
A lockable tool clamp mechanism featuring two jaw members and a pivotally connected pin that moves between unlocking and locking positions, allowing secure clamping of the tool holder only when the pin is in the locking position, preventing unintentional release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing tool clamp structures (propping pins, returning members, retaining blocks) are used to hold tool holder in position, then the tool holder can be clamped and held during normal operation, but the tool clamp can be unintentionally opened and the tool holder ejected when receiving unexpected external force
Solution Approach 1:
The pin is positioned to preemptively block the pivoting motion of jaw members before unintentional opening can occur. When external force is applied to the tool holder, the pin already in place prevents the jaw members from pivoting outward, thereby counteracting the harmful effect before it can manifest as tool holder ejection.
Solution Approach 2:
The pin acts as an intermediary element between the jaw members and the external environment. It mediates the interaction by physically blocking the pivoting path of the jaw members, preventing direct transmission of external force that would otherwise cause unintentional opening and ejection of the tool holder.
2Reliability
If a locking mechanism is added to prevent unintentional opening, then security against external forces is improved, but the device complexity increases
Solution Approach 1:
The tool clamp is segmented into distinct functional components: jaw members for clamping, a pin for locking, and a shaft for pivoting. This segmentation allows each component to perform its specific function independently, creating a relatively simple locking mechanism that can be integrated into the existing clamp structure without excessive complexity.
Solution Approach 2:
Instead of using a complex active locking mechanism that requires actuation, the design uses a passive blocking approach where the pin simply occupies the pivoting path of the jaw members. This inverted approach—blocking motion rather than actively controlling it—greatly simplifies the device structure while maintaining reliable prevention of unintentional opening.
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
The mechanism ensures the tool holder remains securely clamped, even under unexpected forces, by restricting jaw member pivoting when the pin is in the locking position, thereby preventing unintentional ejection and enhancing safety during tool changes.
Implementation Method 1
the pin is positioned in the pivoting path of the jaw members, so as to restrict the jaw members from pivoting when in the locking position
Data Source
AI summary
A lockable tool clamp includes two jaw members and a pin together installed on a mount to clamp a tool holder securely. The jaw members each have a connecting portion and a jaw tip. The two connecting portions are overlapped and connected to the mount through a shaft. The pin when installed on the mount is parallel to the shaft, and passes through the two jaw members at a location different from where the shaft passes through the two jaw members. When the pin is in its unlocking position, the jaw members are allowed to pivot with respect to each other, so that the tool holder can be withdrawn or replaced by pushing the jaw tips apart. When the pin is in its locking position, the jaw members are restricted from pivoting with respect to each other. At this time, the tool holder is clamped between the jaw tips securely.