A punch assembly for a leather punching apparatus

Abstract

The utility model relates to the field of leather processing equipment, specifically provide a leather punching equipment's puncher subassembly, including with the punch equipment frame connection's mounting bracket, the vertical setting has the puncher and the tool changing shaft in the mounting bracket, the tool changing shaft is by first motor drive rotation, the fixed sleeve has the mounting disc on the tool changing shaft, the mounting disc is around the tool changing shaft's axis circumference and is provided with a plurality of groups of punching knives, the punching knife can slide along its own axis direction, the tool changing shaft rotation can make the punching knife be located the puncher's just below, the utility model only needs to use the different punching knives needed in advance to set up on the mounting disc, when needing to punch the hole of different shape, through the first motor drive tool changing shaft rotation, let the punching knife of corresponding shape turn to the puncher's just below, the puncher action drives the punching knife to work, need not stop the machine manual replacement tool, can greatly improve the adaptability and punching efficiency of the punching equipment of using this puncher subassembly.

Description

Technical Field

[0001] This utility model relates to the field of leather processing equipment, and specifically provides a punch assembly for a leather punching device. Background Technology

[0002] In the leather processing industry, punching is widely used in footwear, bags, automotive interiors, furniture, and clothing to improve the breathability and aesthetics of leather. Punching equipment uses a controlled, up-and-down moving punch to punch holes in leather materials. However, different sizes or shapes of holes may need to be punched on the same piece of leather. Whenever a different type of hole is required, existing punching equipment must be temporarily stopped to change the punch, which is cumbersome and significantly reduces punching efficiency. Utility Model Content

[0003] Firstly, to address the aforementioned problems, this utility model provides a punch assembly that integrates multiple punching tools. This assembly can automatically change tools according to the required punching pattern, eliminating the need for manual tool changes and improving punching efficiency. The specific technical solution is as follows: A punch assembly for a leather punching device includes a mounting bracket connected to the punching device frame. A tool changer shaft and a punch are vertically arranged in the mounting bracket. The tool changer shaft is driven to rotate by a first motor. A mounting plate is fixedly sleeved on the tool changer shaft. Multiple sets of punching cutters are arranged circumferentially around the axis of the tool changer shaft on the mounting plate. The punching cutters can slide up and down in the mounting plate. Rotation of the tool changer shaft can position the punching cutter directly below the punch.

[0004] In this solution, all the different punching cutters needed are set on the mounting plate in advance. When punching holes of different shapes, the first motor drives the tool changing shaft to rotate, so that the punching cutter with the corresponding shape moves to the bottom of the punch. When the punch moves, it drives the punching cutter to work. There is no need to stop the machine to manually change the tool, which can greatly improve the adaptability and punching efficiency of the punching equipment using the punching cutter assembly.

[0005] Preferably, an elastic member is provided, which provides a vertically upward force to the punching tool.

[0006] Preferably, the punching tool includes a straight rod, with a cutting tool disposed at the lower end of the straight rod, a spacer ring fixedly sleeved in the middle section of the straight rod, an auxiliary disk fixedly sleeved on the tool changing shaft, the straight rod slidingly passing through the mounting disk and the auxiliary disk, the spacer ring being located between the mounting disk and the auxiliary disk, and the elastic structure being disposed between the spacer ring and the auxiliary disk.

[0007] In this design, since the punching cutter moves up and down and the punch and punching cutter are not connected, when the punch moves down to meet the punching cutter, the punching cutter presses down to perform the punching action. During the process of the punch moving up to return to center, the punching cutter is driven by the elastic component to move upward and follow the punch to return to center. When the punch moves up to the limit position or the spacer ring meets the mounting plate, the punching cutter reaches the limit position after moving up. In addition, other punching cutters not directly below the punch also have their spacer rings meet the mounting plate due to the action of the elastic component, so they will not interfere with the work of the punching cutter at the working position.

[0008] Secondly, in order to ensure that the stroke of the punch meets the requirements after the punch is replaced, an adjustable abutment is provided at the top of the straight rod. The adjustable abutment can move up and down relative to the straight rod, thereby adjusting the distance between the adjustable abutment and the punch in the vertical direction.

[0009] In this solution, the working stroke of some punches may vary. By adjusting the height of the adjustable abutment on the punch beforehand, the punch stroke can be precisely adjusted between zero and the punch stroke. When there is no punch stroke requirement, the height of the adjustable abutment on the punch can also be adjusted so that when the punch is at its upper limit, the straight rod also contacts the punch, making the distance between the punch and the straight rod zero and avoiding collision between the punch and the straight rod during the downward movement.

[0010] Preferably, the adjustable abutment includes an abutment sleeve and an abutment post. The top of the straight rod is hollow and has an internal thread. The abutment post has an external thread that matches the internal thread on the straight rod. The abutment sleeve is threadedly connected to the abutment post, and the abutment post is threadedly connected to the top of the straight rod.

[0011] This solution uses a locking sleeve to lock the position of the abutment post on the straight rod, reducing the possibility of the adjustable abutment part loosening during prolonged punching operations, and further ensuring sufficient punching stroke.

[0012] Preferably, the elastic member includes a compression spring, one end of which abuts against the spacer ring and the other end of which abuts against the auxiliary disk.

[0013] Preferably, the punch includes a punch rod and an eccentric rotating component driven by a second motor. The punch rod is vertically slidably disposed in the mounting bracket. The lower end of the punch rod is the working end and contacts the abutment post. The upper end of the punch rod is rotatably connected to the eccentric rotating component.

[0014] Preferably, the first motor is a turret motor and is connected to the tool changer shaft via a synchronous belt, and the second motor is a servo motor.

[0015] Preferably, a buffer pad is provided at the top of the spacer ring.

[0016] In this design, the buffer pad can prevent the punch from colliding directly with the mounting plate when it is pushed back by the elastic component after being pressed down.

[0017] The beneficial effects of this utility model are: The punch assembly provided by this utility model only requires setting the different punching cutters to be used on the mounting plate in advance. When punching holes of different shapes, the first motor drives the tool changing shaft to rotate, so that the punching cutter with the corresponding shape moves to the bottom of the punch. When the punch moves, it drives the punching cutter to work. There is no need to stop the machine and manually change the tool. This can greatly improve the adaptability and punching efficiency of the punching equipment using the punch assembly. Attached Figure Description

[0018] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional schematic diagram of the present invention; Figure 2 This utility model Figure 1 Enlarged view of point A in the middle; Figure 3 This is a cross-sectional view of the punching tool located directly below the punch of this utility model.

[0020] In the above figures, the corresponding reference numerals are as follows: 1-Mounting bracket, 2-Tool changer shaft, 3-Punch, 301-Punch rod, 302-Eccentric rotating component, 4-First motor, 401-Synchronous belt, 5-Mounting disc, 6-Punching tool, 601-Straight rod, 602-Tool, 603-Distance ring, 604-Auxiliary disc, 605-Elastic component, 606-Abutting sleeve, 607-Abutting post, 608-Buffer pad, 7-Second motor. Detailed Implementation

[0021] The technical solution of the present invention will be clearly and completely described in conjunction with the accompanying drawings and through specific implementation methods of the embodiments of the present invention. Example 1

[0022] A punching head 6 that integrates multiple punching cutters 6, capable of automatically changing cutters 602 according to the required punching pattern, such as... Figure 1As shown, the device includes a mounting frame 1 connected to the punching equipment frame. A tool changing shaft 2 and a punch 3 are vertically arranged in the mounting frame 1. The tool changing shaft 2 is driven to rotate by a first motor 4. A mounting plate 5 is fixedly sleeved on the tool changing shaft 2. Multiple sets of punching blades 6 are arranged circumferentially around the axis of the tool changing shaft 2 on the mounting plate 5. The punching blades 6 can slide along the axial direction of the mounting plate 5. The rotation of the tool changing shaft 2 can position the punching blades 6 directly below the punch 3.

[0023] Specifically, the punch 3 includes a punch rod 301 and an eccentric rotating component 302 driven by a second motor 7. The punch rod 301 is vertically slidably disposed in the mounting bracket 1. The lower end of the punch rod 301 is the working end and contacts the abutment post 607. The upper end of the punch rod 301 is rotatably connected to the eccentric rotating component 302. The punching cutter 6 includes a straight rod 601. A cutter 602 is disposed at the lower end of the straight rod 601. A spacer ring 603 is fixedly sleeved in the middle section of the straight rod 601. An auxiliary disk 604 is fixedly sleeved on the tool changing shaft 2. The straight rod 601 slides through the mounting disk 5 and the auxiliary disk 604. The spacer ring 603 is located between the mounting disk 5 and the auxiliary disk 604. An elastic member 605 is disposed between the spacer ring 603 and the auxiliary disk 604. The elastic member 605 provides a vertically upward force to the straight rod 601. The elastic member 605 preferably includes a compression spring, one end of which abuts against the spacer ring 603, and the other end abuts against the auxiliary disk 604. The first motor 4 is a turret motor and is connected to the tool changer 2 via a synchronous belt 401. The second motor 7 is a servo motor.

[0024] Furthermore, such as Figure 3 As shown, a buffer pad 608 is provided on the top of the spacer ring 603. The buffer pad 608 can prevent the punching cutter 6 from colliding directly with the mounting plate 5 when it is pushed back by the elastic member 605 after being pressed down. Only different punching cutters 6 need to be set on the mounting plate 5 in advance. When punching holes of different shapes, the first motor 4 drives the tool changing shaft 2 to rotate, so that the punching cutter 6 with the corresponding shape moves directly below the punch head 3. When the punch head 3 moves, it drives the punching cutter 6 to work. There is no need to stop the machine and manually change the tool 602, which can greatly improve the adaptability and punching efficiency of the punching equipment using the punching cutter 6.

[0025] In this embodiment, since the punching cutter 6 moves up and down, and the punch 3 is not connected to the punching cutter 6, when the punch 3 presses down against the punching cutter 6 to perform the punching action, during the process of the punch 3 moving up to return to center, the punching cutter 6 is driven by the elastic member 605 to move up and return to center, and follows the punch 3 to move up and return to center. When the punch 3 moves up to the limit position or the spacer ring 603 abuts against the mounting plate 5, the punching cutter 6 reaches the limit position after moving up. In addition, other punching cutters 6 that are not directly below the punch 3 also have the spacer ring 603 abut against the mounting plate 5 due to the action of the elastic member 605, so they will not interfere with the work of the punching cutter 6 at the working position. Example 2

[0026] Based on Embodiment 1, in order to ensure that the stroke of the punch 6 meets the requirements after the punch 6 is replaced, an adjustable abutment is provided at the top of the straight rod 601. The adjustable abutment can move up and down relative to the straight rod 601, thereby adjusting the distance between the adjustable abutment and the punch 3 in the vertical direction.

[0027] The working stroke of some punch cutters 6 may vary. By adjusting the height of the adjustable abutment on the punch cutter 6 in advance, the working stroke of the punch cutter 6 can be precisely adjusted between zero and the stroke of the punch 3. When there is no stroke requirement for the punch cutter 6, the height of the adjustable abutment on the punch cutter 6 can also be adjusted so that when the punch 3 is at its upper limit position, the straight rod 601 also contacts the punch 3, making the distance between the punch 3 and the straight rod 601 zero, thus avoiding collision between the punch 3 and the straight rod 601 during the downward movement.

[0028] Specifically, such as Figure 2 As shown, the adjustable abutment includes an abutment sleeve 606 and an abutment post 607. The top of the straight rod 601 is hollow and has an internal thread. The abutment post 607 has an external thread that matches the internal thread on the straight rod 601. The abutment sleeve 606 is threaded to the abutment post 607, and the abutment post 607 is threaded to the top of the straight rod 601. In this embodiment, the abutment post 607 is first rotated to raise and lower the abutment post 607 at the end of the straight rod 601. After determining the correct height, the abutment sleeve 606 is rotated to abut the end of the straight rod 601, providing the abutment post 607 with a force that supports the straight rod 601. This increases the friction between the threads inside the straight rod 601 and the outside of the abutment post 607, strengthening the positioning of the abutment post 607 on the straight rod 601. This reduces the possibility of the adjustable abutment becoming loose during prolonged operation of the punch 3, further ensuring sufficient stroke of the punching cutter 6.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A punch assembly for a leather punching device, characterized in that, The device includes a mounting bracket connected to the frame of a punching machine. A tool changer and a punch are vertically arranged in the mounting bracket. The tool changer is driven to rotate by a first motor. A mounting plate is fixedly sleeved on the tool changer. Multiple sets of punching cutters are arranged circumferentially around the axis of the tool changer on the mounting plate. The punching cutters can slide up and down in the mounting plate. The rotation of the tool changer can position the punching cutter directly below the punch.

2. The punch assembly of a leather punching device according to claim 1, characterized in that, The punching cutter is provided with an elastic member, which provides the punching cutter with a vertically upward force.

3. The punch assembly of a leather punching device according to claim 2, characterized in that, The punching tool includes a straight rod with a cutting tool at the lower end. A spacer ring is fixedly sleeved on the middle section of the straight rod. An auxiliary disk is fixedly sleeved on the tool changing shaft. The straight rod slides through the mounting disk and the auxiliary disk. The spacer ring is located between the mounting disk and the auxiliary disk. An elastic structure is disposed between the spacer ring and the auxiliary disk.

4. The punch assembly of a leather punching device according to claim 3, characterized in that, An adjustable abutment is provided at the top of the straight rod. The adjustable abutment can move up and down relative to the straight rod, thereby adjusting the distance between the adjustable abutment and the punch in the vertical direction.

5. The punch assembly of a leather punching device according to claim 4, characterized in that, The adjustable abutment includes an abutment sleeve and an abutment post. The top of the straight rod is hollow and has an internal thread. The abutment post has an external thread that matches the internal thread on the straight rod. The abutment sleeve is threaded to the abutment post, and the abutment post is threaded to the top of the straight rod.

6. The punch assembly of a leather punching device according to claim 3, characterized in that, The elastic member includes a compression spring, one end of which abuts against the spacer ring and the other end of which abuts against the auxiliary disk.

7. The punch assembly of a leather punching device according to claim 5, characterized in that, The punch includes a punch rod and an eccentric rotating component driven by a second motor. The punch rod is vertically slidably disposed in the mounting bracket. The lower end of the punch rod is the working end and contacts the abutment post. The upper end of the punch rod is rotatably connected to the eccentric rotating component.

8. The punch assembly of a leather punching device according to claim 1, characterized in that, The first motor is a turret motor, and it is connected to the tool changer shaft via a synchronous belt.

9. The punch assembly of a leather punching device according to claim 6, characterized in that, A buffer pad is provided at the top of the fixed-distance ring.

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