Rotary punching machine head of leather punching machine

Abstract

The utility model relates to a rotary punching machine head of a leather punching machine, which comprises a fixed seat, a punching shaft, an upper spring, a lower spring and a motor seat, a round punching shaft box body is rotatably arranged on the fixed seat, the punching shaft box body comprises a rotating shaft, an upper disc and a lower disc, the upper disc and the lower disc are annularly arranged on the rotating shaft, and the motor seat is arranged on the upper disc. Through holes for the punching shafts to penetrate through are distributed in the upper disc and the lower disc in the circumferential direction, the punching shafts are arranged in the through holes of the upper disc in a lifting mode through linear bearings, the bottom ends of the punching shafts penetrate through the through holes of the lower disc and extend to the position below the lower disc, and spring limiting sleeves are annularly arranged in the middles of the punching shafts. The upper spring is arranged on the punching shaft in a sleeving mode and arranged between the spring limiting sleeve and the upper disc. The whole structure of the punching machine head is arranged to be a circular shaft rotating type structure, so that the length of the punching machine head is reduced, and the number of installed cutters is increased; in addition, the motor for driving the punch to move downwards does not need to be provided with a moving guide rail and a driving element, and the equipment cost is low.

Description

Technical Field

[0001] This utility model relates to a rotary punching head for a leather punching machine, belonging to the field of leather processing technology. Background Technology

[0002] A leather punching machine is an automated device used for punching holes in leather. It is suitable for punching leather, artificial leather, plastics, and other materials. The leather industry encompasses major sectors such as leather tanning, shoemaking, leather clothing, leather goods, fur, and related products. All leather products require punching equipment for processing during production. Most existing leather punching machines use a plate-type punching head, such as the punching mechanism disclosed in application number CN2017218667146 and the fully automatic irregular-shaped rotating pad type punching head disclosed in application number CN2023233927874. The plate-type punching head has the following drawbacks: 1. Because the punches are arranged in a straight plate shape, the punching head is long, resulting in a large equipment length, which increases the floor space and transportation difficulty; 2. The plate-type punching head has a small number of blades, which cannot meet the punching requirements of more diverse specifications, thus increasing the limitations of the equipment; 3. When changing blades, the motor that drives the punches downward needs to be moved above the group of punches, so a moving guide rail and drive element are required for the motor, which increases the cost of the equipment.

[0003] Therefore, the research objective of this utility model is to provide a rotary punch head that is short in length, has a large number of blades, and has low equipment cost. Utility Model Content

[0004] To address the shortcomings of the aforementioned technologies, this utility model provides a rotary punching head for a leather punching machine. The overall structure is designed as a circular shaft rotary structure, which not only reduces the length of the punching head but also increases the number of blades that can be mounted. Furthermore, the motor that drives the punch to move downwards does not require a moving guide rail or driving components, resulting in low equipment cost.

[0005] To solve the problems of the existing technology, the technical solution adopted by this utility model is as follows:

[0006] A rotary punching head for a leather punching machine includes a fixed base, a punch shaft, an upper spring, a lower spring, and a motor base. A circular punch shaft housing is rotatably mounted on the fixed base. The punch shaft housing includes a rotating shaft and an upper and lower disc annularly mounted on the rotating shaft. The upper and lower discs have through holes distributed circumferentially for the punch shaft to pass through. The punch shaft is vertically and flexibly positioned within the through holes of the upper disc via a linear bearing. Its bottom end extends through the through holes of the lower disc to below the lower disc. A spring limiting sleeve is annularly mounted around the middle of the punch shaft. The upper spring is sleeved on the punch shaft and positioned between the spring limiting sleeve and the upper disc. The lower spring is sleeved on the punch shaft and positioned between the spring limiting sleeve and the lower disc. The motor base is fixedly mounted on the top of the fixed base. An eccentric shaft is rotatably mounted on the motor base. One end of the eccentric shaft is connected to a swing arm assembly that drives the punch shaft downwards, and the other end is connected to a motor that drives its rotation.

[0007] Furthermore, the rotating shaft and the lower disc are rotatably mounted on the fixed base via bearings, and the top end of the rotating shaft is connected to a motor that drives the punch shaft housing to rotate via a synchronous belt drive.

[0008] Furthermore, the punch shaft is provided in eight groups, and each group of punch shafts has a punch of different specifications installed at the bottom end and an adjusting nut at the top end.

[0009] Furthermore, the swing arm assembly includes a swing arm and a movable shaft. The movable shaft is vertically and flexibly mounted on the fixed base via a bearing seat. Its bottom end is threadedly connected to the adjusting nut, and its top end is hinged to the bottom end of the swing arm. The top end of the swing arm is integrally provided with a round hole, and the eccentric shaft is drivenly connected to the round hole of the swing arm.

[0010] The beneficial effects of this utility model are: 1. The overall structure is set as a circular shaft rotating structure, which reduces the length of the punch head, thereby reducing the length of the equipment, reducing the footprint and transportation difficulty; 2. The number of blades is large, which can meet the punching requirements of more diverse specifications and improve the applicability of the equipment; 3. The motor that drives the punch to move downward does not need to be equipped with a moving guide rail and driving components, resulting in low equipment cost. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] Figure 2 This is a partial structural diagram of the present invention.

[0013] Figure 3 This is a structural schematic diagram of the punch shaft housing of this utility model.

[0014] Figure 4This is a schematic diagram of the structure of the punch shaft of this utility model.

[0015] Figure 5 This is a structural schematic diagram of the swing arm assembly of this utility model.

[0016] The components include: fixed base 1, punch shaft 2, upper spring 3, lower spring 4, motor base 5, punch shaft housing 6, rotating shaft 601, upper disc 602, lower disc 603, spring limit sleeve 7, eccentric shaft 8, swing arm assembly 9, punch 10, adjusting nut 11, swing arm 901, and moving shaft 902. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solution of this utility model, the following description is provided in conjunction with the appendix. Figure 1-5 Further analysis of this utility model is then conducted.

[0018] like Figure 1-5 As shown, a rotary punching head for a leather punching machine includes a fixed base 1, a punching shaft 2, an upper spring 3, a lower spring 4, and a motor base 5. A circular punching shaft housing 6 is rotatably mounted on the fixed base 1. The punching shaft housing 6 includes a rotating shaft 601 and an upper disc 602 and a lower disc 603 annularly mounted on the rotating shaft 601. The upper disc 602 and the lower disc 603 have through holes distributed circumferentially for the punching shaft 2 to pass through. The punching shaft 2 is vertically and flexibly mounted in the through hole of the upper disc 602 via a linear bearing. Its bottom end extends through the through hole of the lower disc 603 to below the lower disc 603. A spring limiting sleeve 7 is annularly mounted in the middle of the punching shaft 2. The upper spring 3 is sleeved on the punching shaft 2 and positioned between the spring limiting sleeve 7 and the upper disc 602. Between 02, the function of the upper spring 3 is to buffer and position the lower spring 4 when it drives the punch shaft 2 to move upward and reset, preventing the lower spring 4 from causing the punch shaft 2 to move excessively upward and bounce up, so that the punch shaft 2 can finally stop smoothly between the two sets of springs. The lower spring 4 is sleeved on the punch shaft 2 and is located between the spring limiting sleeve 7 and the lower disc 603. After the lower spring 4 is compressed, its elastic force will cause the spring limiting sleeve 7 to move upward, driving the punch shaft 2 to move upward, achieving the effect of automatic reset. The motor base 5 is fixedly installed on the top of the fixed base 1. An eccentric shaft 8 is rotatably installed on the motor base 5. One end of the eccentric shaft 8 is connected to a swing rod assembly 9 that drives the punch shaft 2 to move downward, and the other end is connected to a motor that drives it to rotate.

[0019] In this embodiment, preferably, the rotating shaft 601 and the lower disk 603 are rotatably mounted on the fixed base 1 via bearings, and the top end of the rotating shaft 601 is connected to a motor that drives the punch shaft housing 6 to rotate via a synchronous belt drive.

[0020] In this embodiment, preferably, the punch shaft 2 is provided in eight groups, and each group of punch shaft 2 is equipped with a punch head 10 of different specifications at the bottom end, and an adjusting nut 11 is provided at the top end.

[0021] In this embodiment, preferably, the swing arm assembly 9 includes a swing arm 901 and a moving shaft 902. The moving shaft 902 is vertically mounted on the fixed base 1 via a bearing seat. Its bottom end is threadedly connected to the adjusting nut 11. By adjusting the tightening degree of the moving shaft 902 and the adjusting nut 11, the height of each set of punching shafts 2 can be finely adjusted to accommodate more specifications of leather punching. The top end is hinged to the bottom end of the swing arm 901. The top end of the swing arm 901 is integrally provided with a round hole, and the eccentric shaft 8 is drivenly connected in the round hole of the swing arm 901.

[0022] The working principle of this utility model is as follows: The eccentric shaft 8 is driven to rotate by an external motor. When the eccentric shaft 8 rotates to the bottom of the round hole of the swing arm 901, it drives the swing arm 901 and the moving shaft 902 to move downward. The adjusting nut 11 drives the punch shaft 2 to move downward, so that the punch 10 moves downward to punch the leather. At this time, the lower spring 4 is in a compressed state. Then the eccentric shaft 8 leaves the bottom of the round hole of the swing arm 901, and the swing arm 901 loses the pressure applied to it by the eccentric shaft 8. The punch shaft 2 moves upward to reset under the elastic force of the lower spring 4 until the eccentric shaft 8 rotates to the bottom of the round hole of the swing arm 901 again. The punch 10 moves downward again to punch the leather. This process is repeated to continuously punch the leather.

[0023] The tool changing principle of this utility model is as follows: First, loosen the threaded connection between the moving shaft 902 and the adjusting nut 11. Then, drive the rotating shaft 601 to rotate through the external motor, which in turn drives the punch shaft housing 6 to rotate, thereby driving the punch shaft 2 on the punch shaft housing 6 to rotate. When the punch shaft 2 to be selected rotates to the lower part of the moving shaft 902, the rotating shaft 601 stops rotating. Then, the adjusting nut 11 on the punch shaft 2 is threadedly connected to the moving shaft 902.

[0024] The technical solutions provided in this application have been described in detail above. The embodiments used in this document illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the methods and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A rotary punching head for a leather punching machine, characterized in that: The device includes a fixed base, a punch shaft, an upper spring, a lower spring, and a motor base. A circular punch shaft housing is rotatably mounted on the fixed base. The punch shaft housing includes a rotating shaft and an upper and lower disc annularly mounted on the rotating shaft. The upper and lower discs have through holes distributed circumferentially for the punch shaft to pass through. The punch shaft is vertically and flexibly positioned within the through holes of the upper disc via a linear bearing. Its bottom end extends through the through holes of the lower disc to below the lower disc. A spring limiting sleeve is annularly mounted around the middle of the punch shaft. The upper spring is sleeved on the punch shaft and positioned between the spring limiting sleeve and the upper disc. The lower spring is sleeved on the punch shaft and positioned between the spring limiting sleeve and the lower disc. The motor base is fixedly mounted on the top of the fixed base. An eccentric shaft is rotatably mounted on the motor base. One end of the eccentric shaft is connected to a rocker arm assembly that drives the punch shaft downwards, and the other end is connected to a motor that drives its rotation.

2. The rotary punch head of a leather punching machine according to claim 1, characterized in that: The rotating shaft and the lower disc are rotatably mounted on the fixed base via bearings, and the top end of the rotating shaft is connected to a motor that drives the punch shaft housing to rotate via a synchronous belt drive.

3. The rotary punch head of a leather punching machine according to claim 1, characterized in that: The punch shaft is set in eight groups, and each group of punch shafts has a punch of different specifications installed at the bottom end and an adjusting nut at the top.

4. The rotary punch head of a leather punching machine according to claim 3, characterized in that: The swing arm assembly includes a swing arm and a movable shaft. The movable shaft is vertically mounted on the fixed base via a bearing seat. Its bottom end is threadedly connected to the adjusting nut, and its top end is hinged to the bottom end of the swing arm. The top end of the swing arm is integrally provided with a round hole, and the eccentric shaft is drivenly connected to the round hole of the swing arm.

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