Tool changing device and numerical control machining equipment

Abstract

The utility model discloses a tool changing device, which is used for numerical control machining equipment and comprises a cylindrical shell, the shaft core is fixedly installed in the cylindrical shell, and the shaft core is of a tubular hollow structure; the cutter chuck mechanism is arranged in the shaft core, the cutter chuck mechanism can move up and down in the axis direction of the shaft core, the cutter chuck mechanism comprises a transmission part, and the transmission part penetrates out of the side wall of the shaft core; and the driving mechanism penetrates into the side wall of the cylindrical shell and is matched with a transmission part of the cutter chuck mechanism so as to drive the cutter chuck mechanism to move downwards. According to the tool changing device, the driving mechanism penetrates into the side wall of the cylindrical shell and is matched with the transmission part, penetrating out of the side wall of the shaft core, of the tool chuck mechanism, the tool changing operation of driving the tool chuck mechanism to move downwards is achieved, and the structure of the tool changing device and the tool changing operation steps are simplified.

Description

Technical Field

[0001] The utility model relates to the field of CNC machining, in particular to a tool changing device and CNC machining equipment. Background Art

[0002] At present, most CNC machining equipment adopts manual tool changing, which is cumbersome and time-consuming. The automatic tool changing device has a complex structure and a large volume. Therefore, there is an urgent need for a tool changing device with a simple structure and convenient operation. Utility Model Content

[0003] The embodiments of the utility model provide a tool changing device and a numerical control processing equipment, which are used to solve at least one of the above-mentioned technical problems.

[0004] The utility model provides a tool changing device, comprising:

[0005] Cylindrical shell;

[0006] An axis core is fixedly installed inside the cylindrical shell, and the axis core is a tubular hollow structure;

[0007] A tool chuck mechanism is arranged inside the shaft core, the tool chuck mechanism can move up and down along the axis direction of the shaft core, and the tool chuck mechanism includes a transmission component, and the transmission component passes through the side wall of the shaft core;

[0008] A driving mechanism is inserted into the side wall of the cylindrical shell and cooperates with the transmission component of the tool chuck mechanism to drive the tool chuck mechanism to move downward.

[0009] In some embodiments, the tool chuck mechanism includes a tool chuck, a chuck pull rod, and a pull rod pin used as a transmission mechanism, and a limit through hole is provided on the side wall of the shaft core;

[0010] Among them, the lower end of the chuck pull rod is fixedly connected to the tool chuck, and the upper end of the chuck pull rod is fixedly connected to the pull rod pin. The two ends of the pull rod pin pass through the side wall of the shaft core through the limiting through hole, and the two ends of the pull rod pin can move up and down in the limiting through hole.

[0011] In some embodiments, the drive mechanism comprises:

[0012] An eccentric shaft, one end of which penetrates into the side wall of the cylindrical shell and cooperates with the pull rod pin of the tool chuck mechanism to drive the tool chuck mechanism to move downward;

[0013] The lever structure is fixedly connected to the other end of the eccentric shaft to allow the user to operate and change the tool.

[0014] In some embodiments, there are two eccentric shafts, which are symmetrically arranged on both sides of the cylindrical shell to cooperate with both ends of the pull rod pin at the same time.

[0015] In some embodiments, the tool changing device also includes a linkage component arranged between the eccentric shaft and the pull rod pin, and the linkage component is circumferentially arranged around the shaft core; wherein the eccentric shaft directly acts on the linkage component, and the linkage component directly acts on the pull rod pin, thereby realizing indirect linkage between the eccentric shaft and the pull rod pin.

[0016] In some embodiments, the linkage component includes a pull rod press sleeve, which is sleeved on the shaft core, the upper end opening diameter of the pull rod press sleeve is smaller than the diameter of the pull rod pin, and the lower end opening diameter of the pull rod press sleeve is larger than the diameter of the pull rod pin; an eccentric shaft crimping hole is provided on the side wall of the pull rod press sleeve; when the eccentric shaft presses the pull rod press sleeve downward, the upper end of the pull rod press sleeve presses downward on both ends of the pull rod pin.

[0017] In some embodiments, the upper end side wall of the tie rod press sleeve extends toward the axial direction of the tie rod press sleeve to form the upper end opening.

[0018] In some embodiments, an elastic reset member is provided below the pull rod pressing sleeve.

[0019] In some embodiments, the linkage component includes a circular ring structure or a polygonal ring structure, and the circular ring structure or the polygonal ring structure is fixedly connected to both ends of the pull rod pin.

[0020] On the other hand, the present application also provides a CNC machining equipment, characterized in that it is equipped with a tool changing device described in any of the aforementioned embodiments.

[0021] The beneficial effect of the embodiment of the utility model is that: by the driving mechanism penetrating into the side wall of the cylindrical shell and cooperating with the transmission component of the tool chuck mechanism penetrating out of the side wall of the shaft core, the tool changing operation of driving the tool chuck mechanism to move downward is realized, which simplifies the structure of the tool changing device and the steps of the tool changing operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 This is a schematic diagram of the cross-sectional structure of an embodiment of a tool changing device of the utility model;

[0024] Figure 2It is a three-dimensional structural schematic diagram of an embodiment of a tool changing device of the utility model;

[0025] Figure 3 It is a structural schematic diagram of an embodiment of the main components of the tool changing device of the utility model;

[0026] Figure 4 A schematic diagram of the cross-sectional structure of the lever structure in the tool changing device of the present application is provided to highlight the structure;

[0027] Figure 5 To highlight the schematic diagram of the cross-sectional structure of the eccentric shaft in the tool changing device of the present application;

[0028] Figure 6a To highlight the cross-sectional structure diagram of the pull rod pressing sleeve in the tool changing device of the present application;

[0029] Figure 6b This is a structural schematic diagram of an embodiment of a pull rod pressing sleeve in a tool changing device of the present application;

[0030] Figure 7 To highlight the cross-sectional structural diagram of the pull rod pin in the tool changing device of the present application;

[0031] Figure 8 To highlight the cross-sectional structure diagram of the chuck pull rod in the tool changing device of the present application;

[0032] Fig. 9 To highlight the schematic diagram of the cross-sectional structure of the tool chuck in the tool changing device of the present application;

[0033] Fig.10 To highlight the cross-sectional structure diagram of the shaft core in the tool changing device of the present application;

[0034] Fig.11 To highlight the cross-sectional structure diagram of the bearing in the tool changing device of the present application;

[0035] Fig.12 To highlight the cross-sectional structure diagram of the cylindrical housing in the tool changing device of the present application;

[0036] Fig.13 To highlight the cross-sectional structural diagram of the bottom cover in the tool changing device of the present application;

[0037] Fig.14 To highlight the cross-sectional structural diagram of the shaft end nut in the tool changing device of the present application.

[0038] Explanation of the reference numerals: 1- breaking rod structure, 2- left and right eccentric shafts, 3- pull rod pressing sleeve, 4- wave spring, 5- pull rod pin top screw, 6- pull rod pin, 7- chuck pull rod, 8- tool chuck, 9- cylindrical shell, 10- bottom cover, 11- shaft end nut, 12- bearing, 13- shaft core. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment 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 making creative work are within the scope of protection of the utility model. It should be noted that the embodiments in this application and the features in the embodiments can be combined with each other without conflict.

[0040] It should also be noted that, in this article, the terms "include" and "comprise" include not only those elements, but also other elements not explicitly listed, or elements inherent to such processes, methods, articles or equipment. In the absence of further restrictions, the elements defined by the sentence "include..." do not exclude the existence of other identical elements in the process, method, article or equipment that includes the elements.

[0041] like Figure 1 The figure is a schematic diagram of the cross-sectional structure of an embodiment of the tool changing device provided by the present application. In this embodiment, the tool changing device is used for CNC machining equipment, and the tool changing device includes: a cylindrical housing 9, a shaft core 13, a tool chuck mechanism (6, 7, 8) and a driving mechanism. Among them,

[0042] The shaft core 13 is fixedly installed inside the cylindrical shell 9, and the shaft core 13 is a tubular hollow structure; the tool chuck mechanism (6, 7, 8) is arranged inside the shaft core 13, and the tool chuck mechanism (6, 7, 8) can move up and down along the axial direction of the shaft core 13, and the tool chuck mechanism (6, 7, 8) includes a transmission component (for example, a pull rod pin 6), and the transmission component passes through the side wall of the shaft core 13; the driving mechanism passes through the side wall of the cylindrical shell 9 and cooperates with the transmission component of the tool chuck mechanism to drive the tool chuck mechanism to move downward.

[0043] In addition, a limiting through hole 13.1 (such as Figure 3 The lower end of the chuck pull rod 7 is fixedly connected to the tool chuck 8, and the upper end of the chuck pull rod 7 is fixedly connected to the pull rod pin 6 (as shown in Figure 3As shown, the rod pin 6 is inserted into the mounting hole 7.1 at the upper end of the chuck rod 7. In addition, the rod pin 6 can be fixed from the top of the chuck rod 7 by the rod pin top screw 5 to prevent the rod pin 6 from moving left and right). The two ends of the rod pin 6 pass through the side wall of the shaft core 13 through the limiting through hole, and the two ends of the rod pin 6 can move up and down in the limiting through hole, thereby driving the tool chuck 8 to move up and down through the chuck rod 7. Among them, the tool chuck 8 can move downward to the state of replacing the tool head, and can move upward to the state of clamping the tool head.

[0044] This embodiment realizes the tool changing operation of driving the tool chuck mechanism to move downward by penetrating the side wall of the cylindrical shell through the driving mechanism and cooperating with the transmission component of the tool chuck mechanism penetrating the side wall of the shaft core, thereby simplifying the structure of the tool changing device and the steps of the tool changing operation.

[0045] Continue to refer to Figure 1 The driving mechanism includes: an eccentric shaft 2 and a lever structure 1. One end of the eccentric shaft 2 penetrates the side wall of the cylindrical shell 9 and cooperates with the pull rod pin 6 of the tool chuck mechanism to drive the tool chuck mechanism to move downward; the lever structure 1 is fixedly connected to the other end of the eccentric shaft 2 for the user to operate to change the tool. There are two eccentric shafts 2, which are symmetrically arranged on both sides of the cylindrical shell 9 to cooperate with both ends of the pull rod pin 6 at the same time. In this embodiment, the two ends of the pull rod pin 6 are driven by two symmetrically distributed eccentric shafts 2, so that the overall driving force is relatively balanced, ensuring that the tool chuck mechanism (6, 7, 8) can move smoothly along the axial direction of the shaft core 13.

[0046] Continue to refer to Figure 1 The tool changing device also includes a linkage component (for example, a pull rod sleeve 3) arranged between the eccentric shaft 2 and the pull rod pin 6, and the linkage component is circumferentially arranged around the shaft core 13; wherein the eccentric shaft 2 directly acts on the linkage component, and the linkage component directly acts on the pull rod pin 6, thereby realizing indirect linkage between the eccentric shaft 2 and the pull rod pin 6.

[0047] The circumferentially arranged linkage components ensure that no matter to which position the shaft core 13 drives the pull rod pin 6 to rotate, the eccentric shaft 2 can drive the pull rod pin 6 through the linkage components.

[0048] Exemplarily, the linkage component includes a tie rod sleeve 3, which is sleeved on the shaft core 13, the upper end opening diameter of the tie rod sleeve 3 is smaller than the diameter of the tie rod pin 6 (for example, the upper end side wall of the tie rod sleeve 3 extends in the axial direction of the tie rod sleeve 3 to form the upper end opening), and the lower end opening diameter of the tie rod sleeve 3 is larger than the diameter of the tie rod pin 6; an eccentric shaft crimping hole 3.1 is provided on the side wall of the tie rod sleeve 3 (such as Figure 3 and Figure 6bWhen the eccentric shaft 2 presses the rod pressing sleeve 3 downward, the upper end of the rod pressing sleeve 3 presses the two ends of the rod pin 6 downward, thereby driving the tool chuck 8 to move downward through the chuck pull rod 7.

[0049] In some embodiments, an elastic reset member (e.g., a wave spring 4) is provided below the tie rod sleeve 3. When the eccentric shaft 2 rotates from a compressed state to a relaxed state, the wave spring 4 presses the tie rod sleeve 3 upward, so that the tie rod sleeve 3 returns to its original position.

[0050] In some embodiments, the linkage component includes a circular ring structure or a polygonal ring structure, and the circular ring structure or the polygonal ring structure is fixedly connected to both ends of the pull rod pin 6.

[0051] The manner in which the circular ring structure or polygonal ring structure is fixedly connected to the two ends of the pull rod pin 6 includes but is not limited to:

[0052] The inner arm of the circular ring structure or the polygonal ring structure is fixedly connected to the two ends of the pull rod pin 6 (for example, threaded holes are set at the two ends of the pull rod pin 6, and threaded holes are correspondingly set on the inner arm of the circular ring structure or the polygonal ring structure, and the two are fixedly installed by bolts or screws); or, the upper surface of the circular ring structure or the polygonal ring structure is fixedly connected to the two ends of the pull rod pin 6 (for example, a threaded hole is opened vertically downward on the upper surface of the circular ring structure or the polygonal ring structure, and threaded holes are correspondingly set in the direction perpendicular to the axial direction at both ends of the pull rod pin 6, and the two are fixedly installed by bolts or screws); or, the lower surface of the circular ring structure or the polygonal ring structure is fixedly connected to the two ends of the pull rod pin 6 (for example, a threaded hole is opened vertically upward on the lower surface of the circular ring structure or the polygonal ring structure, and threaded holes are correspondingly set in the direction perpendicular to the axial direction at both ends of the pull rod pin 6, and the two are fixedly installed by bolts or screws). It should be noted that the above is only an example and the present application does not limit this.

[0053] like Figure 2 The figure shows a schematic diagram of the three-dimensional structure of the tool changing device of the present application. Among them, a motor 01 is arranged at the top of the tool changing device. The lever structure 1 includes a lever 101, a U-shaped connector 102, an axial connector 103 and an eccentric shaft mounting seat 104. A bottom cover 10 is arranged at the bottom of the cylindrical shell 9, and a through hole is arranged on the bottom cover 10 for the shaft core 13 to pass through. A shaft end nut 11 is also arranged between the bottom cover 10 and the shaft core 13 to realize the fixed installation of the shaft core 13, and the lower end of the shaft core 13 extends out of the tool chuck 8.

[0054] Among them, the eccentric shaft mounting seat 104 is fixedly mounted on the opposite sides of the cylindrical shell 9 by screws, and the eccentric shaft mounting seat 104 is provided with a through hole for mounting the eccentric shaft 2. After installation, the eccentric shaft can rotate relative to the eccentric shaft mounting seat 104. A mounting screw hole is provided at one end of the eccentric shaft 2 facing outside the cylindrical shell 9, which is used to fix the axial connecting member 103 on the eccentric shaft 2 by screws. A bend rod mounting hole is provided on the axial connecting member 103 for mounting the bend rod 101. The two ends of the U-shaped connecting member 102 are respectively fixedly connected to the outer ends of two symmetrically arranged eccentric shafts 2. After connection, there is no relative rotation between the U-shaped connecting member 102 and the eccentric shaft 2.

[0055] Continue to refer to Figure 1 In some embodiments, the cylindrical shell 9, the bearing 12 and the shaft core 13 are fixedly matched and will not move in the vertical direction; the external lever structure 1 can be rotated by one hand, and the left and right eccentric shafts 2 will be driven to rotate together during the rotation. Since the eccentric shaft 2 is an eccentric structure, it will squeeze the draw rod sleeve 3 to make it move downward; the draw rod pin screw 5, the draw rod pin 6, the chuck draw rod 7, and the tool chuck 8 are fixedly matched, and they will move slightly in the vertical direction inside the shaft core 13 as a whole; when the draw rod sleeve 3 is squeezed and moved downward by the left and right eccentric shafts 2, it will touch the draw rod pin 6, and finally drive the tool chuck 8 to move downward and extend out of the shaft core 13 to release the tool. At this time, the other hand removes the tool and inserts a new tool. During the whole process, the hand holding the lever always keeps applying force to maintain the position of the lever; after the new tool is placed in the tool chuck 8, do not move your hand and continue to hold the tool to make it firmly inserted in the tool chuck 8, because at this time the tool chuck 8 is still in a relaxed state of releasing the tool; the hand holding the lever gradually reduces the force, the external structure 1, the pull rod pressure sleeve 3, and the tool chuck 8 will automatically reset, and the tool chuck 8 clamps the new tool, and you can release both hands at this time; the source of the reset force of the pull rod pressure sleeve 3 is the wave spring 4, and the source of the reset force of the tool chuck 8 is the disc spring 7.1 on the chuck pull rod 7 in the middle of the shaft core 13; at this point, a complete tool changing process is completed.

[0056] like Figure 4 The figure shows a cross-sectional structural diagram highlighting the lever structure in the tool changing device of the present application, wherein the blue part is the lever structure 1 in the present application. It should be noted that the rotation angle of the lever structure 1 in the present application is between 60° and 90°, and the force of manually bending the lever is between 10 and 15 kg. These two ranges make the operation very comfortable and easy to apply force, conform to ergonomic principles, and provide an excellent operating experience. The lever itself can be installed on either side of the lever structure 1, taking into account people with different hand position usage habits.

[0057] like Figure 5The figure shows a schematic diagram of the cross-sectional structure of the eccentric shaft in the tool changing device of the present application, wherein the blue part is the eccentric shaft 2 in the present application. The user can drive the eccentric shaft 2 to rotate by operating the lever in the lever structure 1.

[0058] like Figure 6a The figure shows a schematic diagram of the cross-sectional structure of the tie rod pressing sleeve in the tool changing device of the present application, wherein the blue part is the tie rod pressing sleeve 3 in the present application.

[0059] like Figure 6b Shown is a structural schematic diagram of an embodiment of a pull rod pressing sleeve in the tool changing device of the present application.

[0060] like Figure 7 The figure shows a schematic diagram of the cross-sectional structure highlighting the pull rod pin in the tool changing device of the present application, wherein the blue part is the pull rod pin 6 in the present application.

[0061] like Figure 8 The figure shows a schematic diagram of the cross-sectional structure of the chuck pull rod in the tool changing device of the present application, wherein the blue part is the chuck pull rod 7 in the present application.

[0062] like Fig. 9 The figure shows a schematic diagram highlighting the cross-sectional structure of the tool chuck in the tool changing device of the present application, wherein the blue part is the tool chuck 8 in the present application.

[0063] like Fig.10 The figure shows a schematic diagram of the cross-sectional structure of the shaft core in the tool changing device of the present application, wherein the blue part is the shaft core 13 in the present application. Fig.10 As shown in , when the rod pin 6 is squeezed by the rod sleeve 3, the rod pin 6 drives the chuck rod 7 to move downward, so that the tool chuck 8 extends out of the lower end of the shaft core 13, completing the release of the tool head. As can be seen from the figure, the inner diameter of the lower end of the shaft core 13 gradually increases from top to bottom, and the corresponding outer diameter of the tool chuck 8 gradually increases from top to bottom, so that when the tool chuck 8 moves upward, the lower end of the shaft core 13 gradually clamps the tool chuck 8, and when the tool chuck 8 moves downward, the lower end of the shaft core 13 releases the tool chuck 8, so as to facilitate the installation of the tool head on the tool chuck 8. Return to reference Figure 3 It can be seen that the lower end of the tool chuck 8 in the embodiment of the present application is divided into multiple parts, and these multiple parts can be gathered together toward the center when squeezed by the lower end of the shaft core 13, thereby clamping the tool head.

[0064] like Fig.11The figure shows a cross-sectional structure diagram highlighting the bearing in the tool changing device of the present application, wherein the blue part is the bearing 12 in the present application. Among them, one bearing is arranged at the upper part of the cylindrical housing 9, and two bearings are arranged at the lower part of the cylindrical housing 9. The three bearings cooperate with each other to realize the stable installation of the shaft core 13, and the shaft core 13 can rotate relative to the bearings.

[0065] like Fig.12 The figure shows a schematic diagram highlighting the cross-sectional structure of the cylindrical shell in the tool changing device of the present application, wherein the blue part is the cylindrical shell 9 in the present application.

[0066] like Fig.13 The figure shows a schematic diagram of the cross-sectional structure of the bottom cover in the tool changing device of the present application, wherein the blue part is the bottom cover 10 in the present application. The bottom cover is fixedly mounted on the lower end of the cylindrical shell 9 to achieve encapsulation.

[0067] like Fig.14 Shown is a schematic diagram highlighting the cross-sectional structure of the shaft end nut in the tool changing device of the present application, wherein the blue portion is the shaft end nut 11 in the present application.

[0068] In addition, the above Figure 4-Figure 14 The green part in the figure is the wave spring 4 in the present application, which is used to reset the pull rod pressing sleeve 3.

[0069] In some embodiments, the present application also provides a CNC machining equipment, which is equipped with the tool changing device described in any embodiment of the present application.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A tool changing device for CNC machining equipment, characterized in that: include: A cylindrical housing (9); An axis core (13) is fixedly installed inside the cylindrical shell (9), and the axis core (13) is a tubular hollow structure; A tool chuck mechanism is arranged inside the shaft core (13), the tool chuck mechanism can move up and down along the axis direction of the shaft core (13), and the tool chuck mechanism includes a transmission component, and the transmission component passes through the side wall of the shaft core (13); A driving mechanism is inserted into the side wall of the cylindrical shell (9) and cooperates with a transmission component of the tool chuck mechanism to drive the tool chuck mechanism to move downward.

2. The tool changing device according to claim 1, characterized in that: The tool chuck mechanism comprises a tool chuck (8), a chuck pull rod (7) and a pull rod pin (6) used as a transmission mechanism, and a limiting through hole is provided on the side wall of the shaft core (13); The lower end of the chuck pull rod (7) is fixedly connected to the tool chuck (8), and the upper end of the chuck pull rod (7) is fixedly connected to the pull rod pin (6). Both ends of the pull rod pin (6) pass through the side wall of the shaft core (13) through the limiting through hole, and both ends of the pull rod pin (6) can move up and down in the limiting through hole.

3. The tool changing device according to claim 2, characterized in that: The driving mechanism includes: An eccentric shaft (2), one end of which penetrates into the side wall of the cylindrical housing (9) and cooperates with a pull rod pin (6) of the tool chuck mechanism to drive the tool chuck mechanism to move downward; The lever structure (1) is fixedly connected to the other end of the eccentric shaft (2) so as to allow the user to operate and change the tool.

4. The tool changing device according to claim 3, characterized in that: The number of the eccentric shafts (2) is two, which are symmetrically arranged on both sides of the cylindrical shell (9) so as to simultaneously cooperate with the two ends of the pull rod pin (6).

5. The tool changing device according to claim 3, characterized in that: It also includes a linkage component arranged between the eccentric shaft (2) and the pull rod pin (6), and the linkage component is circumferentially arranged around the shaft core (13); wherein the eccentric shaft (2) directly acts on the linkage component, and the linkage component directly acts on the pull rod pin (6), thereby realizing indirect linkage between the eccentric shaft (2) and the pull rod pin (6).

6. The tool changing device according to claim 5, characterized in that: The linkage component includes a tie rod pressing sleeve (3), which is sleeved on the shaft core (13); the upper end opening diameter of the tie rod pressing sleeve (3) is smaller than the diameter of the tie rod pin (6), and the lower end opening diameter of the tie rod pressing sleeve (3) is larger than the diameter of the tie rod pin (6); an eccentric shaft crimping hole is provided on the side wall of the tie rod pressing sleeve (3); when the eccentric shaft (2) presses the tie rod pressing sleeve (3) downward, the upper end of the tie rod pressing sleeve (3) presses the two ends of the tie rod pin (6) downward.

7. The tool changing device according to claim 6, characterized in that: The upper end side wall of the tie rod pressing sleeve (3) extends in the axial direction of the tie rod pressing sleeve (3) to form the upper end opening.

8. The tool changing device according to claim 7, characterized in that: An elastic reset piece is arranged below the pull rod pressing sleeve (3).

9. The tool changing device according to claim 5, characterized in that: The linkage component comprises a circular ring structure or a polygonal ring structure, and the circular ring structure or the polygonal ring structure is fixedly connected to both ends of the pull rod pin (6).

10. A CNC machining equipment, characterized in that: The invention is provided with a tool changing device as claimed in any one of claims 1 to 9.

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