Tool holding structure and tool changing system with the tool holding structure

Abstract

A knife-holding structure is provided for holding a knife handle. The structure includes a knife-holding base, a limiting frame, and a resetting unit. The knife-holding base has two clamping arms that support the knife handle. The limiting frame is pivotally connected to the knife-holding base and can pivot between a first position and a second position. When the limiting frame is in the first position, it restricts the position of the knife handle; when the limiting frame is in the second position, the knife handle can be removed. The resetting unit is used to cause the limiting frame to continue moving towards the first position. The knife-changing system of this invention, which includes this knife-holding structure, provides a pushing unit and a knife-retrieving arm. The pushing unit can push the limiting frame to pivot from the first position to the second position, and the knife-retrieving arm can grasp and remove the knife handle from the knife-holding structure.

Claims

1. A knife-holding structure for holding a knife handle, comprising: a knife-holding base having two clamping arms forming a knife-holding space between the two clamping arms, the knife handle being able to enter and exit the knife-holding space; a limiting frame movably connected to the knife-holding base, the limiting frame being movable between a first position and a second position; and a reset unit for causing the limiting frame to maintain movement towards the first position; thereby, when the knife handle is located in the knife-holding space and the limiting frame is located in the first position, the limiting frame confines the knife handle within the knife-holding space; when the limiting frame is located in the second position, the knife handle can be moved out of the knife-holding space.

2. The tool-holding structure as described in claim 1, wherein the limiting frame is pivotally connected to the tool-holding seat and is pivotable between the first position and the second position, the limiting frame having a limiting end and a force-bearing end divided by the pivoting portion, wherein, When the limiting end is in the first position, it abuts against the knife handle. When the force-bearing end is subjected to an external force, the limiting frame is pivoted to the second position, and the limiting end no longer abuts against the knife handle.

3. The tool placement structure as described in claim 2, wherein the reset unit includes at least one elastic element having two working ends, one working end acting on the tool placement seat and the other working end acting on the limiting frame, and the at least one elastic element storing elastic potential energy when the distance between the two working ends changes.

4. The knife-positioning structure as described in claim 3, wherein the reset unit includes at least one pusher, which is subjected to the release of elastic potential energy by the at least one elastic member and pushes the limiting frame at one end to generate a pivot.

5. The tool holder structure as described in claim 4, wherein the tool holder includes a tool post and a positioning block, the tool post having the two clamping arms, and the positioning block being fixedly connected to the tool post; wherein one of the tool post and the positioning block has at least one hole; the limiting frame is pivotally connected to the positioning block through a pin; the at least one elastic member and the at least one pushing member are disposed in the at least one hole, one actuating end of the at least one elastic member abuts against the tool holder, and the other actuating end of the at least one elastic member abuts against the at least one pushing member.

6. The knife-holding structure as described in claim 2, wherein the limiting frame has two extension arms and a lever plate, the two extension arms form a closing opening, and a stop block is connected to one end of each extension arm, each stop block constitutes a limiting end, the lever plate connects the two extension arms, and the lever plate constitutes the force-bearing end; wherein the distance between the two stop blocks is less than the diameter of the knife handle.

7. The knife-holding structure as described in claim 6, wherein the knife-holding seat has an opening, the lever plate of the limiting frame and the two extension arms are connected in an L-shape, and the lever plate passes through the opening.

8. The knife-positioning structure as described in claim 6, wherein the pawl of the limiting frame is connected to the two extension arms at an obtuse angle, and the reset unit and the external force act on two opposite sides of the pawl.

9. A tool changing system, comprising: a tool magazine, wherein at least one tool placement structure as described in any one of claims 1 to 8 is provided on the tool magazine; and a tool retrieval arm movable relative to the tool magazine between a reference position and a tool retrieval position, wherein, When the knife-retrieving arm moves to the knife-retrieving position, one end of the knife-retrieving arm can grab the knife handle on the knife-holding structure; a pushing unit, when one end of the knife-retrieving arm grabs the knife handle, pushes the limiting frame to move from the first position to the second position, and the knife-retrieving arm can move to the reference position.

10. The tool changing system as claimed in claim 9, wherein the pushing unit includes a pneumatic cylinder disposed on the tool magazine and having a push rod controlled to push the limit frame to move.

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