Tool Holder Clamping Structure for Jam-Free Ejection
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Solution Overview
Problem
Existing tool holders require high force for tool insertion and face difficulties in easy removal, leading to potential jamming and tilting issues during clamping.
Innovation Solution
A tool or workpiece holder with a clamping device featuring two clamping elements that can move relative to each other and a conical clamping surface, equipped with an ejecting mechanism to facilitate easy removal by moving into a disengaged position, allowing for precise alignment and prevention of tilting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If high force is applied for tool insertion into conical receiving openings, then secure clamping is achieved, but tool removal becomes difficult and jamming occurs
Solution Approach 1:
The clamping device is divided into two separate clamping elements (first and second clamping elements) that can move independently relative to each other and to the receiving body. This segmentation allows one element to provide secure clamping while the other facilitates easy removal through the ejecting mechanism, resolving the contradiction between strong clamping and easy tool removal.
Solution Approach 2:
The ejecting mechanism inverts the normal clamping action by providing an opposing force through ejecting elements that push the tool or workpiece out of the receiving opening. This inversion allows the same clamping device to easily remove tools after secure clamping, eliminating the jamming problem associated with high-force insertion only.
2Device complexity
If clamping elements are fixed in position, then structural simplicity is maintained, but accurate centric clamping cannot be achieved with inaccurate placement
Solution Approach 1:
The clamping elements are made movable within the receiving body, allowing them to dynamically adjust their positions to accommodate inaccurate tool placement or dirt. This dynamic capability enables accurate centric clamping without requiring complex pre-alignment procedures, while the movement is controlled through a relatively simple actuating mechanism.
3Device complexity
If a single clamping element is used, then device complexity is reduced, but tilting movements and slanting of tools cannot be prevented
Solution Approach 1:
The clamping device uses two separate clamping elements instead of a single element. These elements can move relative to each other and work in conjunction with the ejecting mechanism to prevent tilting and slanting of tools during clamping and removal operations, while maintaining relatively simple device structure.
4Strength
If conical receiving openings are used for tool insertion, then secure holding is achieved, but tool removal requires high force and causes jamming
Solution Approach 1:
The ejecting mechanism inverts the insertion action by using ejecting elements to push the tool or workpiece out of the conical receiving opening in the opposite direction of insertion. This inversion eliminates the jamming problem and makes tool removal easy while maintaining the secure holding capability of the conical geometry during normal operation.
Data Source
AI summary
A tool or workpiece holder with a receiving body and a clamping device for clamping a tool or a workpiece in a receiving opening of the receiving body. The clamping device comprises a first clamping element, which can be moved in a receiving portion of the receiving body at right angles to a central axis of the receiving opening, and a second clamping element, which can be moved relative to the first clamping element at right angles to the central axis of the receiving opening by means of an actuating element. The second clamping element has conical bottom clamping surfaces on the two clamping elements for inserting the tool or workpiece into the receiving opening. An ejecting mechanism is disposed on the first clamping element for ejecting the tool or workpiece from the receiving opening when the clamping elements are moved into a disengaged position.