Detachable tool changing arm for tool magazine

Abstract

The utility model discloses a detachable tool changing arm for a tool magazine, which belongs to the technical field of tool changing arms and comprises a tool changing arm main body, a clamping jaw mechanism and a locking mechanism, the clamping jaw mechanism comprises a clamping jaw and a top jaw which are distributed front and back, and a first tool clamping surface of the clamping jaw and a second tool clamping surface of the top jaw are positioned in the same plane; the clamping jaw is detachably connected with the tool changing arm main body; a top claw groove used for containing a top claw is formed in the side face of the tool changing arm body, the top claw is rotationally arranged on the tool changing arm body, a top rod is arranged at the tail end of the top claw, a through groove is formed in the tool changing arm body, one end of the through groove is communicated with the top claw groove, and the other end of the through groove is communicated with the first containing groove. A locking shaft of the locking mechanism comprises a locking rod with the top extending out of the top face of the tool changing arm body and a locking head with the outer contour exceeding the peripheral face of the locking rod, a reset spring is arranged on the bottom face of the locking head, and an ejector rod can make contact with or break away from the locking head so as to change the curvature radius of a structure composed of a first tool clamping face and a second tool clamping face. The tool changing efficiency is improved while it is ensured that the tool is firmly grabbed.

Description

Technical Field

[0001] The utility model relates to the technical field of tool changing arms, in particular to a detachable tool changing arm for a tool magazine. Background Art

[0002] The tool change arm for tool magazine is a key component of CNC machine tools. Its function is to realize the rapid and accurate replacement of tools in the tool magazine of machine tools. With the continuous improvement of the manufacturing industry's requirements for production efficiency and processing accuracy, traditional tool change arm technology can no longer meet the needs of modern machine tools. The traditional tool change arm's tool claw is integrated with the tool change arm, which has strong limitations and is only suitable for the corresponding tool handle. When the tool change arm's tool claw is worn or damaged due to long-term use or improper operation, it is often necessary to disassemble and repair the entire tool, which is too cumbersome and relatively costly. In addition, when the traditional tool change arm grabs the tool handle, it often causes the tool to fall due to loose grip, affecting processing.

[0003] The prior art discloses a tool changing arm, in which rotatable tool claws are respectively arranged on the front and rear surfaces of the arm body, and a mechanical clamping mechanism and a hydraulic clamping mechanism are arranged in the arm body to improve the firmness when clamping the tool; although compared with the technical solution in which the tool claw and the tool changing arm are an integral structure, the prior art can only replace the tool claw when the tool claw is worn to solve the wear problem, but there are many parts connecting the tool claw and the arm body, and there are still problems such as time-consuming and labor-intensive replacement of the tool claw, excessive complexity and low work efficiency.

[0004] Therefore, in order to solve the problems of low tool changing efficiency and complicated operation in the prior art, the present invention proposes a novel detachable tool changing arm technology for a tool magazine, which improves the tool changing efficiency while ensuring a firm grip of the tool. Utility Model Content

[0005] The utility model aims to provide a detachable tool changing arm for a tool magazine in view of the defects and shortcomings in the prior art, which improves the tool changing efficiency while ensuring a firm grip of the tool.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] The utility model provides a detachable tool changing arm for a tool magazine, comprising a tool changing arm body, a clamping claw mechanism arranged at the end of the tool changing arm body, and a locking mechanism arranged inside the tool changing arm body, wherein the clamping claw mechanism comprises a clamping claw and a top claw distributed front and back, the head of the clamping claw is provided with a first tool clamping surface in a C shape, the head of the top claw is provided with a second tool clamping surface in an arc shape, and the first tool clamping surface and the second tool clamping surface are in the same plane;

[0008] The clamping jaw is connected to the tool changing arm body via a threaded connector;

[0009] The top claw groove is provided on the side of the tool change arm body away from the clamping claw, and the top claw is placed in the top claw groove, and the top claw is rotatably connected to the tool change arm body by a rotating shaft, and a push rod is provided at the end of the top claw, and a through groove is provided in the interior of the tool change arm body for placing the push rod. One end of the through groove is connected to the top claw groove, and the other end of the through groove is connected to the first placement groove for placing the locking mechanism. The locking mechanism includes a locking shaft and a return spring that can move up and down, and the locking shaft includes a locking rod and a locking head fixedly connected to the locking rod. The outer contour of the locking head exceeds the outer peripheral surface of the locking rod, and the top of the locking rod extends out of the top surface of the tool change arm body. The return spring is provided between the bottom surface of the locking head and the bottom surface of the first placement groove, and the push rod can contact or disengage with the outer peripheral surface of the locking head to change the curvature radius of the arc structure composed of the first clamping tool surface and the second clamping tool surface.

[0010] Preferably, the diameter of the outer circumferential surface of the locking head gradually increases from top to bottom.

[0011] Preferably, a limit block is provided at the end of the clamping jaw, and a clamping jaw groove for accommodating the limit block is provided at the end of the tool changing arm body, and the limit block is fixedly arranged in the clamping jaw groove by a threaded connector.

[0012] Preferably, a positioning keyway is provided on the clamping jaw, and a positioning key used in conjunction with a positioning slot on a tool is placed in the positioning keyway.

[0013] Preferably, a tool clamping boss is provided in the middle of the first tool clamping surface, and the tool clamping boss and the second tool clamping surface are in the same horizontal plane.

[0014] Preferably, the locking mechanism also includes a retractable ejector component placed inside the tool changing arm body; a second placement groove is provided inside the tool changing arm body, the ejector component is placed in the second placement groove, one end of the ejector component is connected to the bottom surface of the second placement groove, the other end of the ejector component is connected to the ejector claw, and the ejector component is located between the rotating shaft and the ejector rod.

[0015] Preferably, the ejection component is an ejection spring.

[0016] Preferably, a third placement groove is also provided on the tool changing arm body, and the locking shaft pressure cover is placed in the third placement groove. A through hole is provided in the middle of the locking shaft pressure cover, and the inner diameter of the through hole is adapted to the outer diameter of the locking rod, and the top of the locking rod passes through the through hole.

[0017] Preferably, the first placement groove passes through the bottom surface of the tool changing arm body, a locking shaft bottom cover is provided on the bottom surface of the tool changing arm body corresponding to the first placement groove, and the reset spring is located between the bottom surface of the locking head and the locking shaft bottom cover.

[0018] Preferably, the tool changing arm body is also provided with an axial hole for accommodating the cam box output shaft, and the end of the axial hole away from the cam box output shaft is provided with a clamping sleeve for fixing the cam box output shaft in the axial hole, and the specifications of the clamping sleeve are compatible with the specifications of the cam box output shaft.

[0019] Compared with the prior art, the utility model has achieved the following technical effects:

[0020] 1. The utility model adopts a clamping mechanism composed of a clamping jaw and a top jaw at the end of the tool changing arm body, wherein the clamping jaw is detachably connected to the tool changing arm body, and the top jaw can rotate relative to the tool changing arm body, thereby changing the radius of curvature of the arc structure composed of the clamping jaw and the top jaw, and locking the top jaw through the cooperation of the top rod on the top jaw and the locking head. When the clamping jaw is worn, only the threaded connector needs to be removed to replace a new clamping jaw, which is relatively convenient to operate and greatly improves the tool changing efficiency; and when the top rod contacts the outer peripheral surface of the locking head, the locking head can prevent the top jaw from continuing to rotate backward, thereby fixing the radius of curvature of the arc structure composed of the top jaw and the clamping jaw, so that it can clamp the tool. In summary, the technical solution of the utility model can improve the tool changing efficiency while ensuring the firm grasping of the tool.

[0021] Compared with the prior art, other technical solutions of the utility model have achieved the following technical effects:

[0022] 2. The utility model can also make the tool changing arm of the utility model adaptable to tools of different specifications by gradually increasing the diameter of the outer peripheral surface of the locking head from top to bottom, so as to improve the application range of the tool changing arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0024] Figure 1 It is a schematic diagram of the axial structure of the tool changing arm;

[0025] Figure 2-Figure 5 It is a schematic diagram of the exploded structure of the tool changing arm;

[0026] Figure 6It is a schematic diagram of the main structure of the tool changing arm;

[0027] Figure 7 It is a schematic diagram of the cross-sectional structure at AA;

[0028] Figure 8 It is a side view structural diagram of the tool changing arm;

[0029] Fig. 9 It is a schematic diagram of the cross-sectional structure at BB.

[0030] Among them, 1. tool changing arm body; 2. clamping jaws; 3. top jaws; 4. first tool clamping surface; 5. second tool clamping surface; 6. top jaw groove; 7. rotating shaft; 8. ejector rod; 9. through groove; 10. first placement groove; 11. locking shaft; 12. reset spring; 13. locking rod; 14. locking head; 15. limit block; 16. clamping jaw groove; 17. positioning key groove; 18. positioning key; 19. tool clamping boss; 20. ejection component; 21. second placement groove; 22. third placement groove; 23. locking shaft pressure cover; 24. through hole; 25. locking shaft bottom cover; 26. shaft hole; 27. expansion sleeve; 28. exhaust hole; 29. ​​locking sleeve. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0033] like Figures 1 to 9As shown, the utility model provides a detachable tool changing arm for a tool magazine, comprising a tool changing arm body 1, a clamping jaw mechanism arranged at the end of the tool changing arm body 1 and a locking mechanism arranged inside the tool changing arm body 1, the clamping jaw mechanism comprises a clamping jaw 2 and a top jaw 3 distributed front and back, the head of the clamping jaw 2 is provided with a first tool clamping surface 4 in a C shape, the head of the top jaw 3 is provided with a second tool clamping surface 5 in an arc shape, the first tool clamping surface 4 and the second tool clamping surface 5 are in the same plane; wherein the clamping jaw 2 is connected to the tool changing arm body 1 through a threaded connector; a top jaw groove 6 is provided on the side of the tool changing arm body 1 away from the clamping jaw 2, the top jaw 3 is placed in the top jaw groove 6, the top jaw 3 is rotatably connected to the tool changing arm body 1 through a rotating shaft 7, the end of the top jaw 3 is provided with a push rod 8, and the tool changing arm body A through groove 9 for placing a push rod 8 is provided inside the body 1, one end of the through groove 9 is connected to the top claw groove 6, and the other end of the through groove 9 is connected to a first placement groove 10 for placing a locking mechanism. The locking mechanism includes a locking shaft 11 that can move up and down and a return spring 12 arranged at the bottom of the locking shaft 11. When the locking shaft 11 is not subject to force, the curvature radius of the arc structure composed of the first clamping surface 4 and the second clamping surface 5 is adapted to the curvature radius of the tool to be clamped, that is, the curvature radius of the arc structure composed of the first clamping surface 4 and the second clamping surface 5 is slightly smaller than the curvature radius of the tool to be clamped, and there is friction between the inner wall surface of the arc structure and the outer peripheral surface of the tool to be clamped, and the tool to be clamped will not fall off automatically when no external force is applied. The locking shaft 11 includes a locking rod 13 and a locking head 14. The outer contour of the locking head 14 protrudes from the outer peripheral surface of the locking rod 13. The top of the locking rod 13 extends out of the top surface of the tool changing arm body 1. A reset spring 12 is provided between the bottom surface of the locking head 14 and the bottom surface of the first placement groove 10. When the locking shaft 11 is not subjected to external force, the push rod 8 and the outer peripheral surface of the locking head 14 are in contact with each other. When the locking shaft 11 is subjected to a downward external force, the push rod 8 and the outer peripheral surface of the locking head 14 are out of contact, wherein the first placement groove 10 is a stepped hole.

[0034] When it is necessary to clamp the tool, first apply downward pressure to the locking shaft 11 to make the locking shaft 11 move downward, the push rod 8 is out of contact with the locking head 14, and the top claw 3 is in a relaxed state, that is, the push rod 8 can move backward along the through groove 9, and the tool is put in at this time. Under the push of the tool, the top claw 3 rotates along the rotating shaft 7, so that the second tool clamping surface 5 is away from the first tool clamping surface 4, increasing the curvature radius of the arc structure composed of the first tool clamping surface 4 and the second tool clamping surface 5, so that the tool can be placed inside the arc structure composed of the first tool clamping surface 4 and the second tool clamping surface 5; then remove the force applied to the locking shaft 11, under the action of the reset spring 12, the locking shaft 11 moves upward, the locking head 14 contacts with the push rod 8, and the outer peripheral surface of the locking head 14 supports the push rod 8, so that the push rod 8 cannot move backward. At this time, the top claw 3 is in a locked state, and the curvature radius of the arc structure composed of the first tool clamping surface 4 and the second tool clamping surface 5 is restored to a state slightly smaller than the tool radius to clamp the tool.

[0035] Since the clamping jaw 2 is connected to the tool changing arm body 1 by a threaded connection, when the first tool clamping surface 4 of the clamping jaw 2 is worn to the point where the tool cannot be clamped, the threaded connection can be removed and a new clamping jaw 2 can be replaced. Compared with the form in which the clamping jaw 2 and the tool changing arm body 1 are a whole or a rotatable top jaw 3 is respectively provided on the front and rear sides of the tool changing arm body 1, the present application can improve the tool changing efficiency while ensuring a firm grip of the tool.

[0036] In order to ensure that the tool changing arm body 1 can still clamp the tool after rotating 90 degrees, a clamping mechanism and a locking mechanism are set at both ends of the tool changing arm body 1, and the left clamping mechanism overlaps with the right clamping mechanism after rotating 180 degrees around the center of the shaft hole 26.

[0037] In order to enable the tool changing arm to adapt to tools of different diameters, the present application sets a gradually increasing diameter of the outer peripheral surface of the locking head 14 from top to bottom. When the force applied to the locking shaft 11 is removed, the push rod 8 first contacts the portion with a smaller diameter of the outer peripheral surface of the locking head 14. If the arc structure composed of the first tool clamping surface 4 and the second tool clamping surface 5 can clamp the tool at this time, the top claw 3 is blocked by the outer peripheral surface of the locking head 14 and cannot rotate outward (that is, the direction in which the second tool clamping surface 5 is away from the first tool clamping surface 4), and the top claw 3 is in a locked state. If the diameter of the tool is smaller than the first tool clamping surface 4, the top claw 3 will be in a locked state. If the radius of curvature of the arc structure composed of the clamping surface 4 and the second clamping surface 5 is smaller than that of the second clamping surface 5, the top jaw 3 will continue to rotate inward (i.e., the direction in which the second clamping surface 5 approaches the first clamping surface 4), reducing the radius of curvature of the arc structure composed of the first clamping surface 4 and the second clamping surface 5, and at the same time, the locking shaft 11 continues to move upward, so that the top rod 8 contacts the relatively large diameter portion of the outer peripheral surface of the locking head 14, until the arc structure composed of the first clamping surface 4 and the second clamping surface 5 can clamp the tool. After clamping, the top jaw 3 is in a locked state under the blocking effect of the outer peripheral surface of the locking head 14. The outer peripheral surface of the locking head 14 can be a curved surface with a gradually changing diameter, or a plurality of cylinders can be arranged at the bottom of the locking rod 13, and the diameter of the cylinders gradually increases from top to bottom. At this time, the plurality of cylinders together constitute the locking head 14, and the diameter of each cylinder corresponds to a tool of a certain specification.

[0038] In order to ensure that the arc structure composed of the first clamping surface 4 and the second clamping surface 5 is compatible with the outer peripheral surface of the tool, the present application provides a limit block 15 at the end of the clamping jaw 2, and the end of the tool changing arm body 1 is provided with a clamping jaw groove 16 for accommodating the limit block 15. The limit block 15 is fixed in the clamping jaw groove 16 by a threaded connection, and the limit block 15 and the clamping jaw groove 16 are both square to facilitate processing and improve the convenience of loading and unloading.

[0039] The top surface of the clamping jaw 2 is provided with a positioning keyway 17, and a positioning key 18 used in conjunction with the positioning groove on the tool is placed in the positioning keyway 17 to prevent the tool from axial rotation when the tool is clamped; to further improve the limiting effect, the positioning key 18 and the positioning keyway 17 are both square. A tool clamping boss 19 is provided in the middle of the first tool clamping surface 4, and the tool clamping boss 19 is in the same horizontal plane as the second tool clamping surface 5. By providing the tool clamping boss 19, the axial movement of the tool can be limited, further ensuring the accuracy of the tool position.

[0040] The locking mechanism also includes a retractable ejector component 20 disposed inside the tool change arm body 1, so that when the force acting on the locking shaft 11 is removed, the locking head 14 can move upward more easily. Specifically, a second placement groove 21 is provided inside the tool change arm body 1, and the ejector component 20 is arranged in the second placement groove 21. One end of the ejector component 20 is connected to the second placement groove 21, and the other end of the top component 20 is connected to the inner side surface of the top claw 3, wherein the inner side surface of the top claw 3 refers to the top claw 3 located in the top claw groove 6. The inner side surface is the rear side surface of the top claw 3; and the ejector component 20 is located between the rotating shaft 7 and the ejector rod 8, so that when the locking shaft 11 is pressed downward, the ejector component 20 is in a shortened state, and when the force acting on the locking shaft 11 is removed, the ejector component 20 is in an extended state to push the top claw 3 to rotate the second clamping surface 5 toward the direction close to the first clamping surface 4. At this time, the ejector rod 8 moves forward along the through groove 9 to move away from the locking head 14, so that the locking head 14 can move upward more easily under the thrust of the reset spring 12.

[0041] The ejection component 20 is an elastic component that contracts when under pressure and returns to its original position when the pressure is removed, such as a spring, elastic rubber, elastic foam, etc. As a preferred embodiment of the present application, the ejection component 20 is an ejection spring. In order to improve the position stability of the locking shaft 11 when it is not under force and prevent the locking shaft 11 from automatically moving downward under the action of gravity, the present application provides a third placement groove 22 on the top surface of the tool changing arm body 1, and a locking shaft pressure cover 23 is provided in the third placement groove 22. A through hole 24 is provided in the middle of the locking shaft pressure cover 23. The inner diameter of the through hole 24 is adapted to the outer diameter of the locking rod 13, and the top of the locking rod 13 passes through the through hole 24. The inner diameter of the through hole 24 is adapted to the outer diameter of the locking rod 13, which means that the inner diameter of the through hole 24 is slightly smaller than the outer diameter of the locking rod 13, so that when the locking rod 13 is extended into the through hole 24, there is friction between the locking rod 13 and the inner wall of the through hole 24, and the locking rod 13 will not automatically move downward when no external force is applied. Preferably, the locking rod 13 of the present application is a cylindrical structure, and a locking sleeve 29 is sleeved on the locking rod 13 to increase the outer diameter of the matching portion between the locking rod 13 and the through hole 24, wherein the locking shaft pressure cover 23 is fixed in the third placement groove 22 by threaded fasteners.

[0042] In order to facilitate the installation of the locking shaft 11 and the return spring 12, the first placement groove 10 passes through the bottom surface of the tool change arm body 1, and a locking shaft bottom cover 25 is arranged at the bottom surface of the tool change arm body 1 corresponding to the first placement groove 10, and the return spring 12 is located between the bottom surface of the locking head 14 and the locking shaft bottom cover 25. Preferably, the bottom surfaces of the locking shaft bottom cover 25 and the locking head 14 are both provided with grooves, and the size of the grooves is adapted to the outer diameter of the return spring 12 to limit the position of the return spring 12 in the locking shaft bottom cover 25 and the locking head 14. The locking shaft bottom cover 25 is fixed to the bottom surface of the tool change arm body 1 by threaded fasteners. In order to reduce the resistance of the return spring 12 and the ejection component 20 when compressed, an exhaust hole 28 is arranged at a position corresponding to the return spring 12 on the locking shaft bottom cover 25 and a position corresponding to the ejection component 20 on the top claw 3.

[0043] The tool change arm body 1 is also provided with an axial hole 26 for accommodating the cam box output shaft. The end of the axial hole 26 away from the cam box output shaft is provided with a clamping sleeve 27 for fixing the cam box output shaft in the axial hole 26. The specification of the clamping sleeve 27 matches the specification of the cam box output shaft. When changing the tool, the cam box output shaft extends into the axial hole 26 and is inserted into the inside of the clamping sleeve 27. The inner and outer circles of the clamping sleeve 27 are adjusted by the bolts in the clamping sleeve 27 to fix the cam box output shaft and the tool change arm body 1. When the cam box output shaft moves, the tool change arm body 1 moves together.

[0044] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

Claims

1. A detachable tool changing arm for a tool magazine, characterized in that: The tool change arm comprises a tool change arm body, a clamping jaw mechanism disposed at the end of the tool change arm body, and a locking mechanism disposed inside the tool change arm body, wherein the clamping jaw mechanism comprises a clamping jaw and a top jaw distributed front and back, the head of the clamping jaw is provided with a first C-shaped tool clamping surface, the head of the top jaw is provided with a second arc-shaped tool clamping surface, and the first tool clamping surface and the second tool clamping surface are in the same plane; The clamping jaw is connected to the tool changing arm body via a threaded connector; The top claw groove is provided on the side of the tool change arm body away from the clamping claw, and the top claw is placed in the top claw groove, and the top claw is rotatably connected to the tool change arm body by a rotating shaft, and a push rod is provided at the end of the top claw, and a through groove is provided in the interior of the tool change arm body for placing the push rod. One end of the through groove is connected to the top claw groove, and the other end of the through groove is connected to the first placement groove for placing the locking mechanism. The locking mechanism includes a locking shaft and a return spring that can move up and down, and the locking shaft includes a locking rod and a locking head fixedly connected to the locking rod. The outer contour of the locking head exceeds the outer peripheral surface of the locking rod, and the top of the locking rod extends out of the top surface of the tool change arm body. The return spring is provided between the bottom surface of the locking head and the bottom surface of the first placement groove, and the push rod can contact or disengage with the outer peripheral surface of the locking head to change the curvature radius of the arc structure composed of the first clamping tool surface and the second clamping tool surface.

2. The detachable tool changing arm for tool magazine according to claim 1, characterized in that: The diameter of the outer peripheral surface of the locking head increases gradually from top to bottom.

3. The detachable tool changing arm for tool magazine according to claim 2, characterized in that: A limit block is provided at the end of the clamping jaw, and a clamping jaw groove for accommodating the limit block is provided at the end of the tool changing arm body. The limit block is fixedly arranged in the clamping jaw groove through a threaded connector.

4. The detachable tool changing arm for the tool magazine according to claim 3, characterized in that: The clamping jaw is provided with a positioning keyway, and a positioning key used in conjunction with the positioning slot on the tool is placed in the positioning keyway.

5. The detachable tool changing arm for tool magazine according to claim 4, characterized in that: A tool clamping boss is provided in the middle of the first tool clamping surface, and the tool clamping boss and the second tool clamping surface are in the same horizontal plane.

6. The detachable tool changing arm for a tool magazine according to any one of claims 1 to 5, characterized in that: The locking mechanism also includes a retractable ejector component placed inside the tool changing arm body; a second placement groove is provided inside the tool changing arm body, and the ejector component is placed in the second placement groove, one end of the ejector component is connected to the bottom surface of the second placement groove, and the other end of the ejector component is connected to the ejector claw, and the ejector component is located between the rotating shaft and the ejector rod.

7. The detachable tool changing arm for the tool magazine according to claim 6, characterized in that: The ejection component is an ejection spring.

8. The detachable tool changing arm for the tool magazine according to claim 7, characterized in that: A third placement groove is also provided on the tool changing arm body, and the locking shaft pressure cover is placed in the third placement groove. A through hole is provided in the middle of the locking shaft pressure cover, and the inner diameter of the through hole is adapted to the outer diameter of the locking rod, and the top of the locking rod passes through the through hole.

9. The detachable tool changing arm for the tool magazine according to claim 8, characterized in that: The first placement groove passes through the bottom surface of the tool change arm body, and a locking shaft bottom cover is provided on the bottom surface of the tool change arm body corresponding to the first placement groove, and the reset spring is located between the bottom surface of the locking head and the locking shaft bottom cover.

10. The detachable tool changing arm for the tool magazine according to claim 9, characterized in that: The tool changing arm body is also provided with an axial hole for accommodating the cam box output shaft, and the end of the axial hole away from the cam box output shaft is provided with a clamping sleeve for fixing the cam box output shaft in the axial hole, and the specifications of the clamping sleeve are compatible with the specifications of the cam box output shaft.

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