Perforating machine with replaceable perforating mechanism

Abstract

The invention relates to the technical field of perforating machines, and discloses a perforating machine with a replaceable perforating mechanism, which comprises two groups of supporting legs, the tops of the two groups of supporting legs are fixedly connected with a workbench, the top of the workbench is fixedly connected with a supporting plate, the perforating machine is mounted on one side, far away from the workbench, of a bearing plate, and the perforating machine further comprises a pulling mechanism, the pulling mechanism comprises a top plate, the side, close to the supporting plate, of the top plate is fixedly connected with the top of the supporting plate, the side, away from the supporting plate, of the top plate is fixedly connected with a first connecting rod, an attaching plate is arranged on the outer wall of the first connecting rod, and the side, close to the first connecting rod, of the attaching plate is slidably connected with the outer wall of the first connecting rod. By arranging the pulling mechanism, when a drill bit needs to be replaced, an operator only needs to manually pull the drill bit to be replaced, the drill bit to be replaced can rapidly appear in the view field, and the drill bit replacing process is greatly simplified.

Description

Technical Field

[0001] The present invention relates to the technical field of punching machines, and particularly to a punching machine with a replaceable punching mechanism. Background Art

[0002] A punching machine is a device used to punch holes in various materials. There are many types of punching machines, which can be classified into manual, electric, pneumatic, etc. according to power, and industrial, office, household, etc. according to usage. Industrial punching machines have high power and precision, and can punch holes in various materials such as metals and plastics, and are used in fields such as automobile manufacturing and electronic equipment production. Office and household punching machines are mainly used to punch holes in thin materials such as paper, which is convenient for document sorting, etc., and are simple to operate, convenient and practical.

[0003] The patent application with the application number CN202011217153.3 discloses a punching machine with a replaceable punching mechanism, which includes a base, a column, a top plate and a punching mechanism. The column is erected on one side of the base, the top plate is vertically installed at the top of the column, and the top plate is parallel to the base. A "convex" - shaped through - groove is opened on the lower end surface of the top plate, and the punching mechanism includes a sliding block.

[0004] During the punching operation process, due to the diversity of actual requirements, it is often necessary to punch different types of holes, which inevitably requires the use of drill bits of different specifications. The current punching machines on the market have defects in replacing drill bits. Once the required drill bit is missing on - site, the replacement cannot be completed in time. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a punching machine with a replaceable punching mechanism to solve the problems raised in the above - mentioned background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A punching machine with a replaceable punching mechanism, including two groups of support legs, both tops of the two groups of support legs are fixedly connected with a workbench, a support plate is fixedly connected to the top of the workbench, a punching machine is installed on the side of the support plate away from the workbench, and further includes: Pulling mechanism, the pulling mechanism includes a top plate, one side of the top plate close to the support plate is fixedly connected to the top of the support plate, the other side of the top plate away from the support plate is fixedly connected with a first connecting rod, a fitting plate is arranged on the outer wall of the first connecting rod, one side of the fitting plate close to the first connecting rod is slidably connected to the outer wall of the first connecting rod, a fixing ring is arranged at the top of the outer wall of the first connecting rod, the inner wall of the fixing ring is fixedly connected to the outer wall of the first connecting rod, one side of the fixing ring close to the fitting plate is fixedly connected with a bent plate through a fixing shaft, one side of the bent plate close to the fitting plate is rotatably connected with a rotating plate through a first rotating shaft, a first spring is arranged on one side of the rotating plate close to the fixing ring, both the positive and negative sides of the first spring are fixedly connected to the inner wall of the rotating plate, a pulling plate is slidably connected to the inner wall of the rotating plate, one side of the pulling plate close to the fitting plate is fixedly connected to the outer wall of the fitting plate, and this first spring is used to limit the rotation angle of the fitting plate.

[0007] According to the above technical solution, it further includes a supporting mechanism, the supporting mechanism includes a fixing rod, one side of the fixing rod close to the fitting plate is fixedly connected to the middle of the top of the fitting plate, the top of the outer wall of the fixing rod is fixedly connected with a second connecting rod, and one side of the second connecting rod close to the drilling machine is fixedly connected with a contact ring, and this second connecting rod is used to fix the contact ring.

[0008] According to the above technical solution, two groups of first rebounding rods are arranged on the side of the contact ring away from the second connecting rod, both sides of the two groups of first rebounding rods away from the contact ring are fixedly connected with telescopic rings, both sides of the two groups of second connecting rods close to the contact ring are fixedly connected to the inner wall of the contact ring, and two groups of positioning rods are arranged on the top of the contact ring, and this telescopic ring is used to adapt to different specifications of drill bits and limit them.

[0009] According to the above technical solution, both sides of the two groups of positioning rods close to the contact ring are fixedly connected to the top of the contact ring, both sides of the two groups of positioning rods close to the telescopic ring are fixedly connected with arc-shaped blocks, both sides of the two arc-shaped blocks close to each other are rotatably connected with two groups of clamping blocks through a second rotating shaft, and the contact ring, positioning rods, arc-shaped blocks, clamping blocks, first rebounding rods and telescopic rings are arranged in two groups and are all symmetrically arranged with the middle of the second connecting rod as the center, and this clamping block is used to prevent the drill bit from shaking again.

[0010] According to the above technical solution, it further includes a receiving mechanism, the receiving mechanism includes a suspension rod, one side of the suspension rod close to the fitting plate is fixedly connected to the middle of the bottom of the fitting plate, a second spring is arranged at the bottom of the outer wall of the suspension rod, the second spring is in contact with the outer wall of the suspension rod, and a sliding ring is slidably connected to the outer wall of the suspension rod, and this second spring is used to adjust the position of the sliding ring.

[0011] According to the above technical solution, one side of the sliding ring close to the second spring is fixedly connected to the top of the second spring. Two groups of second resilient rods are fixedly connected to one side of the sliding ring close to the second spring. One side of the two groups of second resilient rods away from the sliding ring is fixedly connected to a bottom plate. Two elastic bands are arranged on one side of the bottom plate close to the sliding ring. The bottom plate is used to support the drill bit.

[0012] According to the above technical solution, one side of the two elastic bands close to the bottom plate is fixedly connected to the outer wall of the bottom plate. One side of the two elastic bands close to the sliding ring is fixedly connected to a moving block. Two groups of rotating blocks are rotatably connected to the outer wall of the two moving blocks through a third rotating shaft. The rotating block is used to fix the drill bit.

[0013] According to the above technical solution, one side of the two groups of rotating blocks on the left close to the hanging rod is fixedly connected to a pulling rope. The two groups of rotating blocks on the right are rotatably connected to a pulling rope through a fourth rotating shaft. The two pulling ropes are both in contact with the top of the sliding ring. The second resilient rod, the bottom plate, the moving block, the rotating block, the pulling rope and the elastic band are arranged in two groups and are symmetrically arranged with the middle of the fitting plate rod as the center. The pulling rope is used to control the moving distance of the moving block.

[0014] The present invention provides a drilling machine with a replaceable drilling mechanism, which has the following beneficial effects: 1. By setting a pulling mechanism in the present invention, when the drill bit needs to be replaced, the operator only needs to manually pull it, and the drill bit to be replaced can quickly appear within the field of vision, greatly simplifying the drill bit replacement process.

[0015] 2. By setting a supporting mechanism in the present invention, the movement of the idle drill bit is effectively restricted, ensuring that the idle drill bit will not shake randomly during the operation of the equipment, thereby avoiding interference to the operating personnel and ensuring the operation safety. At the same time, the supporting mechanism can also prevent the idle drill bit from colliding due to shaking, reducing equipment wear and extending the service life of the drill bit.

[0016] 3. By setting a receiving mechanism in the present invention, the bottom of the drill bit can be effectively restricted. In this way, when the drill bit is in an idle state, its whole body can be firmly fixed. This design effectively avoids the situation that the drill bit collides with surrounding components due to the vibration generated during the operation of the drilling machine, ensuring the stability and integrity of the drill bit.

[0017] 4. By setting a pulling rope in the present invention, when the drill bit moves downward, the pulling rope can move synchronously and quickly fix the drill bit. This design effectively ensures that the drill bit will not shift in position when moving downward, and at the same time realizes the timely fixation of the drill bit. Description of the Drawings

[0018] Figure 1Schematic structural diagram of the present invention; Figure 2 Schematic structural diagram of the top plate of the present invention; Figure 3 Schematic structural diagram of the pulling mechanism of the present invention; Figure 4 Schematic structural diagram of the fixing ring of the present invention; Figure 5 Schematic structural diagram of the fitting plate of the present invention; Figure 6 Schematic structural diagram of the supporting mechanism of the present invention; Figure 7 Schematic structural diagram of the receiving mechanism of the present invention; Figure 8 Schematic structural diagram of the bottom plate of the present invention.

[0019] In the figure: In the figure: 1, support leg; 2, workbench; 3, support plate; 4, punching machine; 5, pulling mechanism; 501, top plate; 502, first connecting rod; 503, fitting plate; 504, fixing ring; 505, bent plate; 506, rotating plate; 507, pulling plate; 508, first spring; 6, supporting mechanism; 601, fixing rod; 602, second connecting rod; 603, contact ring; 604, positioning rod; 605, arc-shaped block; 606, clamping block; 607, first rebounding rod; 608, telescopic ring; 7, receiving mechanism; 701, hanging rod; 702, sliding ring; 703, second spring; 704, second rebounding rod; 705, bottom plate; 706, moving block; 707, rotating block; 708, pulling rope; 709, elastic band. Detailed implementation manners

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0021] Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation of the present invention.

[0022] In the present invention, unless otherwise clearly specified and defined, terms such as "installation", "connection", "linkage", "fixation" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] Embodiment 1: Refer to Figures 1 - 4 , the present invention provides a technical solution: a drilling machine with a replaceable drilling mechanism, including two groups of support legs 1. Both tops of the two groups of support legs 1 are fixedly connected with a workbench 2. A support plate 3 is fixedly connected to the top of the workbench 2. A drilling machine 4 is installed on one side of the support plate 3 away from the workbench 2. It further includes: A pulling mechanism 5. The pulling mechanism 5 includes a top plate 501. One side of the top plate 501 close to the support plate 3 is fixedly connected to the top of the support plate 3. A first connecting rod 502 is fixedly connected to the side of the top plate 501 away from the support plate 3. A fitting plate 503 is arranged on the outer wall of the first connecting rod 502. One side of the fitting plate 503 close to the first connecting rod 502 is slidably connected to the outer wall of the first connecting rod 502. A fixing ring 504 is arranged at the top of the outer wall of the first connecting rod 502. The inner wall of the fixing ring 504 is fixedly connected to the outer wall of the first connecting rod 502. A bent plate 505 is fixedly connected to the side of the fixing ring 504 close to the fitting plate 503 by a fixed shaft. A rotating plate 506 is rotatably connected to the side of the bent plate 505 close to the fitting plate 503 through a first rotating shaft. A first spring 508 is arranged on the side of the rotating plate 506 close to the fixing ring 504. By arranging the first spring 508, it can ensure that the fitting plate 503 will not be affected by the vibration generated during the drilling process and shift in position in a static state, thus avoiding delaying the work process. Both the positive and negative sides of the first spring 508 are fixedly connected to the inner wall of the rotating plate 506. A pulling plate 507 is slidably connected to the inner wall of the rotating plate 506. One side of the pulling plate 507 close to the fitting plate 503 is fixedly connected to the outer wall of the fitting plate 503. This first spring 508 is used to limit the rotation angle of the fitting plate 503.

[0024] The working principle of this embodiment is as follows: When the staff needs to replace the drill bit, manually pull the fitting plate 503 to rotate it towards the drilling machine 4. When the fitting plate 503 rotates, it will drive the pull plate 507 to rotate synchronously. When the pull plate 507 rotates, it will slide on the rotating plate 506, thereby pushing the first spring 508 to compress. During the process of pushing the first spring 508, the pull plate 507 will also pull the rotating plate 506 to rotate towards the drilling machine 4 to ensure that the fitting plate 503 can rotate more smoothly. After the staff completes the replacement of the drill bit, manually reset the fitting plate 503. After the fitting plate 503 is reset, the first spring 508 will restrict the pull plate 507, so that the fitting plate 503 will not rotate randomly under the action of the pull plate 507, avoiding interference to the operator.

[0025] Embodiment 2: Please refer to Figures 5 - 6 , on the basis of Embodiment 1, the present invention provides a technical solution: It further includes a supporting mechanism 6. The supporting mechanism 6 includes a fixed rod 601. One side of the fixed rod 601 close to the fitting plate 503 is fixedly connected to the middle of the top of the fitting plate 503. The top of the outer wall of the fixed rod 601 is fixedly connected with a second connecting rod 602. One side of the second connecting rod 602 close to the drilling machine 4 is fixedly connected with a contact ring 603. This second connecting rod 602 is used to fix the contact ring 603. On one side of the contact ring 603 away from the second connecting rod 602, there are two groups of first resilient rods 607. One side of each of the two groups of first resilient rods 607 away from the contact ring 603 is fixedly connected with a telescopic ring 608. One side of each of the two groups of second connecting rods 602 close to the contact ring 603 is fixedly connected to the inner wall of the contact ring 603. On the top of the contact ring 603, there are two groups of positioning rods 604. This telescopic ring 608 is used to adapt to different specifications of drill bits and restrict them. One side of each of the two groups of positioning rods 604 close to the contact ring 603 is fixedly connected to the top of the contact ring 603. One side of each of the two groups of positioning rods 604 close to the telescopic ring 608 is fixedly connected with an arc-shaped block 605. Setting the telescopic ring 608 can effectively restrict the movement of the drill bit. When the drill bit is in a stopped state, the telescopic ring 608 can prevent it from shaking randomly, avoiding the collision of the two drill bits due to shaking, and further reducing the risk of damage to the drill bit. One side of each of the two groups of arc-shaped blocks 605 close to each other is rotatably connected with two groups of clamping blocks 606 through a second rotating shaft. By setting the clamping blocks 606 to be able to rotate flexibly, when facing the drill bit, the clamping blocks 606 can well fit and contact the outer wall of the drill bit, thereby realizing the limit of the drill bit and further firmly fixing the drill bit to ensure the stability of the drill bit during the working process. The contact ring 603, the positioning rods 604, the arc-shaped blocks 605, the clamping blocks 606, the first resilient rods 607 and the telescopic ring 608 are set in two groups and are symmetrically arranged with the middle of the second connecting rod 602 as the center. This clamping block 606 is used to prevent the drill bit from shaking again.

[0026] The working principle of this embodiment is as follows: When the staff places the drill bit in the supporting mechanism 6, the tail of the drill bit will first come into contact with the inner wall of the telescopic ring 608. At this time, the telescopic ring 608 will expand outward. During the expansion process, the first return rod 607 is pushed to contract. At the same time, the movement of the telescopic ring 608 will drive the positioning rod 604 at the top to move synchronously. During this period, the drill bit will also come into contact with the clamping block 606. When the clamping block 606 comes into contact with the drill bit, it will be pushed to rotate outward. This design enables the clamping block 606 to fit with the drill bit by continuously rotating when facing drill bits of different specifications, thereby achieving effective support for the drill bit. After the clamping block 606 completes the support of the drill bit, as the telescopic ring 608 continues to move, the clamping block 606 will continuously approach the positioning rod 604. When the drill bit passes through the supporting mechanism 6, it can be restricted, and the restricted end will no longer move or shake, thus ensuring the stability of the drill bit when it is stationary.

[0027] Embodiment 3: Please refer to Figures 7 - 8 , on the basis of Embodiment 1 and Embodiment 2, the present invention provides a technical solution: It further includes a receiving mechanism 7. The receiving mechanism 7 includes a suspension rod 701. One side of the suspension rod 701 close to the fitting plate 503 is fixedly connected to the middle end of the bottom of the fitting plate 503. A second spring 703 is arranged at the bottom of the outer wall of the suspension rod 701. The second spring 703 is in contact with the outer wall of the suspension rod 701. A sliding ring 702 is slidably connected to the outer wall of the suspension rod 701. The second spring 703 is used to adjust the position of the sliding ring 702. One side of the sliding ring 702 close to the second spring 703 is fixedly connected to the top of the second spring 703. Two groups of second return rods 704 are fixedly connected to one side of the sliding ring 702 close to the second spring 703. The two groups of second return rods 704 are fixedly connected to a bottom plate 705 on the side far from the sliding ring 702. A support for the drill bit is provided on one side of the bottom plate 705 close to the sliding ring 702. Two groups of elastic bands 709 are fixedly connected to the outer wall of the bottom plate 705 on the side close to the bottom plate 705. Two groups of elastic bands 709 are fixedly connected to a moving block 706 on the side close to the sliding ring 702. Two groups of rotating blocks 707 are rotatably connected to the outer walls of the two groups of moving blocks 706 through a third rotating shaft. The rotating block 707 is used to fix the drill bit. One side of the two groups of rotating blocks 707 on the left close to the suspension rod 701 is fixedly connected to a pull rope 708. The two groups of rotating blocks 707 on the right are rotatably connected to a pull rope 708 through a fourth rotating shaft. After the pull rope 708 is provided, under its restraint, the moving block 706 can only move along a fixed line. In addition, the pull rope 708 can also make the moving block 706 automatically reset after completing the work. The two groups of pull ropes 708 are both in contact with the top of the sliding ring 702. The second return rods 704, the bottom plate 705, the moving blocks 706, the rotating blocks 707, the pull ropes 708, and the elastic bands 709 are provided in two groups and are symmetrically arranged with the middle of the rod of the fitting plate 503 as the center. The pull rope 708 is used to control the moving distance of the moving block 706.

[0028] The working principle of this embodiment is as follows: When the drill bit passes through the supporting mechanism 6, it does not stop but continues to move downward. During the continuous downward movement, the drill bit will contact the bottom plate 705, thereby pushing the bottom plate 705 to start moving downward. As the bottom plate 705 continues to move downward, it will pull the second elastic return rod 704 to move downward synchronously. During the downward movement of the second elastic return rod 704, the sliding ring 702 located at its top will move accordingly and slide downward on the outer wall of the hanging rod 701. When the sliding ring 702 slides downward, it will squeeze the second spring 703, causing it to contract downward. It should be noted that the sliding distance of the sliding ring 702 depends on the length of the drilling through. At the same time, the downward movement of the bottom plate 705 will also pull the elastic belt 709 to stretch downward. When the elastic belt 709 moves, it will push the moving block 706 to approach the middle of the bottom plate 705. During the process of the moving block 706 approaching the middle, it will pull the pulling rope 708 to move. When the moving block 706 contacts the drill bit, the rotating block 707 will also expand outward due to the movement of the pulling rope 708. Finally, the rotating block 707 contacts the outer wall of the drill bit and fixes it, ensuring that during the drilling operation, the drill bit will not be affected by the shaking generated during work and restricted from moving.

[0029] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device.

[0030] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A punching machine with a replaceable punching mechanism, comprising two groups of support legs (1), the tops of the two groups of support legs (1) are fixedly connected to a workbench (2), the top of the workbench (2) is fixedly connected to a support plate (3), and a punching machine (4) is installed on a side of the support plate (3) away from the workbench (2), characterized in that: Also includes: A pulling mechanism (5), the pulling mechanism (5) comprising a top plate (501), a side of the top plate (501) close to the support plate (3) being fixedly connected to the top of the support plate (3), a side of the top plate (501) away from the support plate (3) being fixedly connected to a first connecting rod (502), an outer wall of the first connecting rod (502) being provided with a fitting plate (503), a side of the fitting plate (503) close to the first connecting rod (502) being slidably connected to the outer wall of the first connecting rod (502), a fixing ring (504) being provided at the top of the outer wall of the first connecting rod (502), an inner wall of the fixing ring (504) being fixedly connected to the outer wall of the first connecting rod (502), and the fixing ring (504) A curved plate (505) is fixedly connected to one side of the laminating plate (503) via a fixed shaft; a rotating plate (506) is rotatably connected to one side of the curved plate (505) near the laminating plate (503) via a first rotating shaft; a first spring (508) is provided on one side of the rotating plate (506) near the fixed ring (504); both the front and back sides of the first spring (508) are fixedly connected to the inner wall of the rotating plate (506); a pulling plate (507) is slidably connected to the inner wall of the rotating plate (506); a side of the pulling plate (507) near the laminating plate (503) is fixedly connected to the outer wall of the laminating plate (503); and the first spring (508) is used to limit the rotation angle of the laminating plate (503).

2. A punching machine with a replaceable punching mechanism according to claim 1, characterized in that: The supporting mechanism (6) further comprises a fixing rod (601), wherein the fixing rod (601) is fixedly connected to the middle end of the top of the fixing plate (503) on one side of the fixing rod (601) close to the bonding plate (503), a second connecting rod (602) is fixedly connected to the top of the outer wall of the fixing rod (601), and a contact ring (603) is fixedly connected to the side of the second connecting rod (602) close to the puncher (4), and the second connecting rod (602) is used to fix the contact ring (603).

3. A punching machine with a replaceable punching mechanism according to claim 2, characterized in that: Two groups of first rebound rods (607) are arranged on the side of the contact ring (603) away from the second connecting rod (602); the sides of the two groups of first rebound rods (607) away from the contact ring (603) are fixedly connected to a telescopic ring (608); the sides of the two groups of second connecting rods (602) close to the contact ring (603) are fixedly connected to the inner wall of the contact ring (603); two groups of positioning rods (604) are arranged on the top of the contact ring (603); the telescopic ring (608) is used to adapt to drill bits of different specifications and to restrict them.

4. A punching machine with a replaceable punching mechanism according to claim 3, characterized in that: The sides of the two groups of positioning rods (604) close to the contact ring (603) are fixedly connected to the top of the contact ring (603); the sides of the two groups of positioning rods (604) close to the telescopic ring (608) are fixedly connected to the arc block (605); the sides of the two groups of arc blocks (605) close to each other are rotatably connected to two groups of clamping blocks (606) via a second rotating shaft; the contact ring (603), positioning rods (604), arc block (605), clamping block (606), first rebound rod (607) and telescopic ring (608) are arranged in two groups and are symmetrically arranged with the middle part of the second connecting rod (602) as the center; the clamping block (606) is used to prevent the drill bit from shaking again.

5. A punching machine with a replaceable punching mechanism according to claim 1, characterized in that: The receiving mechanism (7) further comprises a receiving mechanism (7), the receiving mechanism (7) comprising a suspension rod (701), the side of the suspension rod (701) close to the bonding plate (503) being fixedly connected to the middle end of the bottom of the bonding plate (503), a second spring (703) being arranged at the bottom of the outer wall of the suspension rod (701), the second spring (703) being in contact with the outer wall of the suspension rod (701), the outer wall of the suspension rod (701) being slidably connected to a sliding ring (702), the second spring (703) being used to adjust the position of the sliding ring (702).

6. A punching machine with a replaceable punching mechanism according to claim 5, characterized in that: The side of the sliding ring (702) close to the second spring (703) is fixedly connected to the top of the second spring (703); the side of the sliding ring (702) close to the second spring (703) is fixedly connected to two groups of second rebound rods (704); the sides of the two groups of second rebound rods (704) away from the sliding ring (702) are fixedly connected to a bottom plate (705); the side of the bottom plate (705) close to the sliding ring (702) is provided with two groups of elastic bands (709); the bottom plate (705) is used to support the drill bit.

7. A punching machine with a replaceable punching mechanism according to claim 6, characterized in that: The two groups of elastic bands (709) are fixedly connected to the outer wall of the bottom plate (705) on one side close to the bottom plate (705), and the two groups of elastic bands (709) are fixedly connected to the outer wall of the bottom plate (705) on one side close to the sliding ring (702). The outer walls of the two groups of movable blocks (706) are rotatably connected to two groups of rotating blocks (707) via a third rotating shaft. The rotating blocks (707) are used to fix the drill bit.

8. A punching machine with a replaceable punching mechanism according to claim 7, characterized in that: The two groups of rotating blocks (707) located on the left side are fixedly connected to a pull rope (708) on one side close to the suspension rod (701), and the two groups of rotating blocks (707) located on the right side are rotatably connected to the pull rope (708) via a fourth rotating shaft. The two groups of pull ropes (708) are in contact with the top of the sliding ring (702). The second rebound rod (704), the bottom plate (705), the moving block (706), the rotating block (707), the pull rope (708) and the elastic band (709) are arranged in two groups and are symmetrically arranged with the middle of the bonding plate (503) as the center. The pull rope (708) is used to control the moving distance of the moving block (706).

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