Locking device of mechanical arm

Abstract

The invention discloses a locking device for the mechanical arm, which comprises an arm and a knockout pin; wherein, the arm is fixedly arranged on a circular arc in the terminal part and the knockout pin is sleeved with a spring in the shoulder. The invention is characterized in that: a knife claw is hinged on the arm; the head of the knife claw is positioned at the outside of the circular arc claw and inclines inward; the knockout pin is arranged in the blind hole of the arm and is contacted with the shank part of the knife claw; a locking bar, a pull block, a pull rod and a double oil port cylinder are arranged in sequence at the lower end of the knockout pin in the direction vertical to the axis of the knockout pin; a sliding sleeve is arranged at the outside of the locking rod and fixed on the arm; a shoulder is arranged at both ends of the locking rod; the shoulder under the knockout pin is provided with a groove matched with the lower end of the knockout pin; a compression spring is arranged on the locking rod positioned between the shoulder and the bottom of the sliding sleeve; the other shoulder is blocked in the slideway of the pull block; the pull block and the cylinder rod of the cylinder are fixedly connected with both ends of the pull rod respectively; the pull rod is arranged in the guiding hole of the support bracket of the frame and the cylinder is fixedly connected with the frame. The invention has an advantage that the cutter is fetched favorably and locked firmly in the moving.

Description

technical field [0001] The invention relates to a locking device for a mechanical arm in a CNC machine tool magazine. Background technique [0002] At present, the tool magazines in various CNC machine tools use mechanical arms to change tools, that is, the tool change is realized by grasping and releasing the tool by the mechanical arm, so the process of tool change involves the mechanical arm The problem of locking the tool. The locking device of the mechanical arm widely used at present, such as figure 1 and figure 2 As shown, it includes an arm 1 with an arc claw 2 fixed at the end, a push rod 3 arranged in a blind hole on the arm 1 on one side of the opening of the arc claw 2, a spring 5 is sleeved on the shoulder of the push rod 3, and the push rod 3. It can carry out telescopic movement; when it is necessary to enter and grab the knife, rely on the force of the arm 1 to rotate or move the tool 6 to press the ejector rod 3, and the ejector rod 3 is retracted under ...

AI Technical Summary

Problems solved by technology

The locking device of the mechanical arm widely used at present, such as figure 1 and figure 2 As shown, it includes an arm 1 with an arc claw 2 fixed at the end, a push rod 3 arranged in a blind hole on the arm 1 on one side of the opening of the arc claw 2, a spring 5 is sleeved on the shoulder of the push rod 3, and the push rod 3. It can carry out telescopic movement; when it is necessary to enter and grab the knife, rely on the force of the arm 1 to rotate or move the tool 6 to press the ejector rod 3, and the ejector rod 3 is retracted under the pressure, and the center line of the tool crosses the center line of the ejector rod 3 Finally, under the action of the spring 5, the ejector rod 3 gradually protrudes, and finally until the cutter 6 is installed, the ejector rod 3 locks the cutter 6 by spring force; Press it in until the knife comes out smoothly; this structure is relatively simple and easy to realize, but because it only relies on the pressure of the spring 5 on the ejector rod 3 to lock the knife 6, it seems too mechanical, and when the spring 5 is too elastic, it will Make it difficult to load and remove the cutter; when the elastic force is appropriate and can be smoothly loaded into the cutter 6, this force is used to lock the cutter 6 and then it is too small. When the arm 1 moves, it is easy to drop the cutter under the action of acceleration, so This structure is not stable enough, it is easy to drop the knife, and it is easy to hurt the machine tool and the operator

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