A device for perforating and inserting a fuse into an outer tube of a firework

Abstract

The utility model discloses a fireworks outer tube punchs and inserts the device of leading -in, relates to fireworks production equipment field. The device includes frame, double -end punch needle, curved line inserts the head of leading -in, synchronous wheel subassembly, punch driving arrangement and inserts the driving arrangement of leading -in, and its core lies in the reverse linkage of punch needle and inserts the head of leading -in through synchronous belt drive: punch needle is connected on one side of synchronous belt, and the other side is connected inserts the head of leading -in, and when descending, synchronous belt drives punch needle to ascend and avoid, and thoroughly puts an end to the car crash, and the synchronous wheel subassembly is driven to punch and insert the fireworks outer tube and prevents the lead wire damage and the continuous processing of many barrels with linear guide, sliding slot -roller, and realizes leading -in. The utility model solves the problem that gear rack maintenance cost is high in the prior art, and the continuity of many barrel processing is poor, has the characteristics of simple structure, does not damage the lead wire, high efficiency, strong adaptability, is applicable to the automation production of all kinds of fireworks outer tube punchs and inserts the leading -in process.

Description

Technical Field

[0001] This utility model belongs to the technical field of fireworks production equipment, specifically relating to a device for punching and inserting leads into the outer tube of fireworks. Background Technology

[0002] In the fireworks production process, the drilling and insertion of the outer tube (commonly known as the "cannon tube") are key steps to ensure product safety and ignition effect. Traditional fireworks outer tube assembly uses a connecting rod or rack drive to achieve synchronous alternation of the drilling and insertion devices, but the mechanism is complex, the machine body is large, and the adjustment of the fuse length is complicated.

[0003] As in the prior art, Chinese invention patent with publication number CN 105486179 A discloses a firework tube punching and inserting device, which realizes the reverse linkage of punching and inserting actions through "gear-double rack meshing transmission": the gear meshes with two racks that are respectively connected to the punching module and the inserting module. When the driving device drives one rack to move, the gear synchronously drives the other rack in the opposite direction, so that the punching needle and the lead wire guide groove move alternately, thereby avoiding component interference (collision).

[0004] However, this solution still has the following technical defects in practical applications: high maintenance cost of transmission structure and stringent precision requirements; limited adaptability to multi-cylinder processing; insufficient functional synchronization and extended single cycle time; sliding friction between rack and guide slider, resulting in greater motion resistance, requiring the configuration of a more powerful drive cylinder or motor, and higher energy consumption than similar equipment.

[0005] Therefore, some of the existing punching and insertion mechanisms are complex (such as gear and rack type), while others have high processing and assembly requirements (such as linkage type). In view of the problems of high maintenance cost, poor continuity of multi-tube processing and insufficient functional synchronization of the existing gear-double rack transmission scheme, there is an urgent need for a firework outer tube punching and insertion device with a simpler structure, easier maintenance and stronger adaptability, so as to further improve the automation level and economy of fireworks production. Utility Model Content

[0006] To address the problems of high maintenance costs, poor continuity of multi-cylinder processing, insufficient functional synchronization, and high motion resistance in existing gear-rack transmission schemes, this utility model provides a firework outer tube punching and insertion device that can simultaneously punch and insert multiple outer tubes. It features a simple structure, convenient operation, economy, environmental protection, and reduced production costs.

[0007] In a first aspect, this utility model proposes a device for punching and inserting leads into a fireworks outer tube, including a frame and a double-headed punching needle for punching holes in the fireworks outer tube. The device further includes: a wire bending insert head, comprising an insert head and a bending head, the insert head being slidably disposed between the bending head, and a compression spring and a stop block provided between the upper end of the insert head and the bending head for bending the lead wire and inserting it into the outer tube hole and preventing damage to the lead wire due to compression; a synchronous pulley assembly, including a synchronous pulley frame and a synchronous belt wound around the synchronous pulley, one side of the synchronous belt being fixedly connected to a punching needle fixing plate, the punching needle fixing plate being connected to the double-headed punching needle, and the other side of the synchronous belt being connected to the lead insertion drive block via a connecting rod; and a punching needle driving device. A punch drive cylinder is provided, which is connected to the synchronous pulley frame, which is mounted on a linear guide rail. The punch drive cylinder can drive the synchronous pulley frame to move up and down along the linear guide rail. An insertion drive device is provided, which is an insertion cylinder. The output end of the insertion cylinder is equipped with a roller. The insertion drive block is connected to the bending insertion head. The insertion drive block is equipped with a sliding groove, and the roller is slidably embedded in the sliding groove. The insertion cylinder drives the bending insertion head to move up and down through the cooperation of the roller and the sliding groove, and drives the double-headed punching needle to move up and down in the opposite direction to the bending insertion head through the transmission of the synchronous belt, thus avoiding interference between the double-headed punching needle and the bending insertion head.

[0008] This device achieves multiple core technological benefits through innovative structural design: First, relying on synchronous belt reverse linkage completely eliminates interference between the punching pin and the insertion head, significantly improving operational safety; second, it simplifies the transmission structure, reduces processing and maintenance costs, and extends the equipment's service life; third, it adopts a combination of linear guide rails, rollers, and slides for drive, improving motion stability and reducing energy consumption; fourth, it optimizes functional synchronization, shortens processing cycle time, and improves lead wire cutting accuracy; fifth, it supports symmetrical arrangement of multiple sets of components, enabling continuous processing of rows of tubes without additional clearance structures, adapting to batch production needs; and sixth, the bending head stop effectively prevents the lead wire from being squeezed and damaged during the U-shaped bending process.

[0009] Preferably, the system further includes a lead wire guide groove limiting block, in which both the bending head and the insertion head are installed, and the lead wire guide groove limiting block is fixedly connected to the frame. Integrating and fixing the bending head and the insertion head ensures lead wire forming and insertion accuracy; the single-point connection synchronous belt reduces force dispersion and improves transmission and reverse linkage stability; modular assembly and maintenance are achieved, improving assembly efficiency and shortening downtime.

[0010] Preferably, the device further includes a cutting device, which is configured as a cutting blade mounted on the frame. The insertion drive block is connected to the cutting blade via rollers. When the insertion drive block moves downward, it drives the cutting blade to synchronously cut the lead wire. When the insertion drive block moves upward, the cutting blade is reset by a torsion spring. The synchronous movement of the cutting blade and the insertion drive block achieves zero delay between lead wire cutting and insertion, improves cutting accuracy (error ≤ 0.3mm), and completely solves the problems of "cutting too short" or "not cutting at all" that easily occur with fixed blades. No additional drive components are required, simplifying the structure while improving the coordination of movements.

[0011] Preferably, the system further includes an automatic stop retraction device, which comprises a stop and a return spring. The stop is mounted on the frame and located below the bending wire insertion head. When the insertion cylinder descends to a preset position, it drives the stop to retract. When the insertion cylinder returns to its original position, the stop resets under the action of the return spring. During insertion, the stop automatically retracts to avoid interfering with wire insertion; after insertion, the return spring drives the stop to automatically reset, eliminating the need for additional drive and simplifying the structure; it ensures continuous insertion action and does not affect processing cycle efficiency.

[0012] Preferably, the linear guide rail is fixed vertically to the frame, the synchronous pulley frame slides with the linear guide rail, and the piston rod of the punch drive cylinder extends and retracts vertically, driving the synchronous pulley frame to move linearly along the linear guide rail. The vertical guidance of the linear guide rail ensures the straightness of the synchronous pulley frame's movement (error ≤ 0.1mm / m), and the vertical drive of the cylinder makes force transmission more direct, improving the stability of the movement; it also reduces the wobbling of the synchronous belt drive, ensures the reverse linkage accuracy of the double-headed punch and the insertion head, and further eliminates the risk of interference.

[0013] Preferably, the double-ended punch is a solid structure with sharp punched ends at both ends. The solid structure significantly improves the strength and rigidity of the punch, preventing deformation and breakage after long-term use and extending its service life; the sharp punched ends at both ends ensure precise and clean punching of the fireworks outer tube, reducing hole position deviation (error ≤ 0.3mm), ensuring smooth insertion of the subsequent lead wire, and further improving the overall processing quality.

[0014] Preferably, the synchronous wheel assembly has at least two sets, and multiple sets of synchronous wheel assemblies are symmetrically arranged along the length of the frame; each set of synchronous wheel assemblies corresponds to a set of double-headed punching needles and a set of bending wire insertion heads, enabling simultaneous punching and insertion of multiple firework outer tubes. The symmetrical arrangement of multiple sets of assemblies allows for simultaneous punching and insertion of multiple firework outer tubes, improving batch processing efficiency; continuous processing of rows of tubes can be achieved without additional clearance structures, ensuring production continuity; and the synchronized operation of each set ensures consistent processing accuracy across multiple tubes.

[0015] Preferably, the bending head has an embedded limit block, which can effectively prevent the lead wire from being squeezed and damaged during the bending into a U-shape, thereby improving product yield and product quality.

[0016] Compared with the prior art, the beneficial results of this utility model are as follows:

[0017] (1) Abandoning the traditional “gear-double rack meshing” and adopting “synchronous belt reverse linkage”, the risk of component collision is eliminated from the structure, and the equipment failure rate is significantly reduced; synchronous belt drive does not require high-precision machining and frequent replacement of metal parts, reducing maintenance costs and extending the maintenance cycle by 3-5 times, greatly improving the economic efficiency of equipment use.

[0018] (2) By connecting the processes synchronously (synchronizing cutting and insertion, and linking punching and avoidance), the single cycle time is shortened to 3-4 seconds, which is more efficient than existing technologies; it supports parallel processing of multiple components, and rows of outer cylinders can be continuously produced without pausing or lifting the transmission components, further improving batch production efficiency and significantly increasing output per unit time.

[0019] (3) The linear guide rail vertical guide and roller-slide buffer drive structure ensure that the motion straightness error is ≤0.1mm / m and the lead wire cutting and insertion deviation is controlled within ±0.3mm; the solid double-headed punch and integrated bending lead wire insertion head design ensure the hole position is accurate and the lead wire forming is consistent, effectively avoiding the problem of lead wire insertion jamming, and improving the overall processing yield.

[0020] (4) The equipment structure is more compact and the manufacturing cost is reduced by eliminating the need for additional obstacle avoidance drive and independent reset components. It can adapt to the diverse production needs of fireworks factories of different sizes and has a wider range of applications.

[0021] (5) Rolling friction replaces sliding friction, reducing drive energy consumption; modular assembly design simplifies installation and maintenance processes, shortens downtime, and further reduces enterprise production and operation costs, which is in line with the industry development trend of automation and low cost. Attached Figure Description

[0022] The accompanying drawings are included to provide a further understanding of the embodiments, and these drawings are incorporated in and constitute a part of this specification. The drawings illustrate embodiments and, together with the description, serve to explain the principles of the present invention. Other embodiments and many anticipated advantages of the embodiments will be readily recognized, as they become better understood through reference to the following detailed description.

[0023] Figure 1 This is a front view of the overall structure of the firework outer tube punching and insertion device according to an embodiment of this utility model;

[0024] Figure 2 This is a front view of the firework outer tube punching and insertion device according to an embodiment of the present invention;

[0025] Figure 3 For along Figure 2 A cross-sectional schematic diagram of AA.

[0026] Figure descriptions: 1. Frame; 2. Double-headed punch; 3. Insertion head; 4. Wire bending head; 5. Synchronous pulley frame; 6. Synchronous belt; 7. Punch fixing plate; 8. Punch drive cylinder; 9. Linear guide rail; 10. Insertion cylinder; 11. Insertion drive block; 12. Wire guide groove limiting block; 13. Cutting blade; 14. Stop. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0028] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] In the first aspect, embodiments of this utility model disclose a perforation and insertion device for a fireworks outer tube, such as... Figures 1-3 As shown, the device includes a frame 1 and a double-headed punch 2 for punching holes in the outer tube of fireworks, and also includes: a bending wire insert 3, a synchronous pulley assembly, a punch drive device, and an insert drive device.

[0030] Specifically, the bending lead includes a lead 3 and a bending head 4. The lead 3 is slidably disposed between the bending heads 4, and a compression spring and a stop are provided between the upper end of the lead 3 and the bending head 4 to bend the lead and insert it into the outer cylinder hole and to prevent the lead from being squeezed and damaged. In this embodiment, there are two bending heads 4.

[0031] The timing pulley assembly includes a timing pulley frame 5 and a timing belt 6 wound around the timing pulley. One side of the timing belt 6 is fixedly connected to a punch pin fixing plate 7, which is connected to a double-headed punch pin 2. The other side of the timing belt 6 is connected to a lead-in drive block 11 via a connecting rod. The timing pulley assembly enables reverse linkage between the double-headed punch pin 2 and the lead-in drive block 11. Through the reverse linkage on both sides of the timing belt 6, interference between the double-headed punch pin 2 and the lead-in head 3 and the bent wire head 4 connected to the lead-in drive block 11 is completely eliminated, reducing the risk of collision due to meshing clearance compared to the traditional gear-rack structure.

[0032] In this embodiment, the punch driving device is configured as a punch driving cylinder 8, which is connected to the synchronous pulley frame 5. The synchronous pulley frame 5 is mounted on the linear guide rail 9, and the punch driving cylinder 8 can drive the synchronous pulley frame 5 to move up and down along the linear guide rail 9. The linear guide rail 9 is fixed to the frame 1 in the vertical direction, and the synchronous pulley frame 5 is slidably engaged with the linear guide rail 9. The piston rod of the punch driving cylinder 8 extends and retracts in the vertical direction, driving the synchronous pulley frame 5 to move linearly along the linear guide rail 9.

[0033] In one specific embodiment, the punch drive device is configured as a punch drive cylinder 8, whose piston rod is connected to the synchronous pulley frame 5 via a floating joint. The synchronous pulley frame 5 is slidably mounted on a linear guide rail 9 vertically fixed on the frame 1. The parallelism error of the linear guide rail 9 is ≤0.1mm / m, ensuring the straightness of the vertical movement of the synchronous pulley frame 5 and avoiding structural fragmentation. The vertical guidance of the linear guide rail 9 ensures the straightness of the movement of the synchronous pulley frame 5 (error ≤0.1mm / m), and in conjunction with the vertical drive of the cylinder, makes the force transmission more direct and improves the stability of the movement; it also reduces the vibration of the synchronous belt 6 transmission, ensures the reverse linkage accuracy of the punching needle and the insertion head 3, and further eliminates the risk of interference.

[0034] The insertion drive device is set as an insertion cylinder 10. The output end of the insertion cylinder 10 is equipped with a roller. The bent wire insertion head is connected to an insertion drive block 11. The insertion drive block 11 is equipped with a sliding groove. The roller is slidably embedded in the sliding groove. The insertion cylinder 10 drives the bent wire insertion head to move up and down through the cooperation of the roller and the sliding groove. It also drives the double-headed punching needle 2 to move up and down in the opposite direction to the bent wire insertion head through the transmission of the synchronous belt 6, so as to avoid interference between the double-headed punching needle 2 and the bent wire insertion head.

[0035] This device achieves multiple core technological benefits through innovative structural design: First, relying on the synchronous belt 6 for reverse linkage, it completely eliminates interference between the punching pin and the insertion head 3, significantly improving operational safety; second, it simplifies the transmission structure, reduces processing and maintenance costs, and extends the equipment's service life; third, it adopts the coordinated drive of linear guide rail 9, rollers, and slides, improving motion stability and reducing energy consumption; fourth, it optimizes functional synchronization, shortens processing cycle time, and improves lead wire cutting accuracy; fifth, it supports the symmetrical arrangement of multiple sets of components, enabling continuous processing of rows of cylinders without additional obstacle avoidance structures, adapting to batch production needs.

[0036] In this embodiment, the firework outer tube punching and insertion device also includes a lead wire guide groove limiting block 12. The bending head 4 and the insertion head 3 are both installed in the lead wire guide groove limiting block 12, and the lead wire guide groove limiting block 12 is fixedly connected to the frame 1. The integrated fixing of the bending head 4 and the insertion head 3 ensures the accuracy of lead wire forming and insertion; the single-point connection of the synchronous belt 6 reduces the force dispersion and improves the stability of transmission and reverse linkage; modular assembly and maintenance are realized, improving assembly efficiency and shortening downtime.

[0037] It also includes a cutting device, which is configured as a cutting blade 13. The cutting blade 13 is mounted on the frame 1 and connected to a torsion spring. It is also connected to a pulley on the insertion drive block 11. The insertion drive block and the cutting blade are connected by rollers. When the insertion drive block 11 moves downward, it can drive the cutting blade 13 to cut the lead wire synchronously. When the insertion drive block 11 moves upward, the cutting blade 13 will automatically return to its original position through the torsion spring. The cutting blade 13 and the insertion drive block 11 move synchronously, realizing zero delay between lead wire cutting and insertion actions, improving cutting accuracy, with a lead wire cutting error of ≤±0.3mm. This completely solves the problem of "cutting too short" or "not cutting at all" that is prone to occur with traditional fixed blades. No additional drive components are required, simplifying the structure while improving the coordination of actions.

[0038] It also includes an automatic stop retraction device, which comprises a stop 14 and a return spring. The stop 14 is mounted on the frame 1 and located below the wire bending insertion head. When the insertion cylinder 10 descends to a preset position, it drives the stop 14 to retract. When the insertion cylinder 10 returns to its original position, the stop 14 is reset by the return spring. During insertion, the stop 14 automatically retracts to avoid interfering with wire insertion; after insertion, the return spring drives the stop 14 to automatically reset, eliminating the need for additional drive and simplifying the structure; it ensures continuous insertion action and does not affect processing cycle efficiency.

[0039] Meanwhile, the double-headed punch 2 in this embodiment of the invention has a solid structure with sharp punched ends at both ends. The solid structure significantly improves the strength and rigidity of the punch, preventing deformation and breakage after long-term use and extending its service life; the sharp punched ends at both ends ensure accurate and clean punching of the fireworks outer tube, reducing hole position deviation (error ≤ 0.3mm), ensuring smooth insertion of the subsequent lead wire, and further improving the overall processing quality.

[0040] In addition, it also includes an outer tube positioning assembly, which consists of a rubber positioning roller and a pneumatic clamping block. It is located at the processing station and is used to clamp and fix the outer tube of the fireworks. It performs rough positioning of the outer tube of the fireworks, and the clamping block clamps and fixes the outer tube of the fireworks. The positioning error is ≤ ±0.5mm.

[0041] The device in this embodiment, through its modular assembly design, not only ensures operational stability and processing accuracy but also simplifies the subsequent maintenance process. When a component malfunctions, the corresponding module can be disassembled and replaced individually, significantly reducing downtime and fully adapting to the large-scale production needs of large, medium, and small fireworks factories.

[0042] The above description is merely a preferred embodiment of this utility model and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of this utility model is not limited to the specific combination of the above-described technical features, but also includes other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in this utility model.

Claims

1. A device for punching and inserting holes in a fireworks outer tube, comprising a frame and a double-ended punching needle for punching holes in the fireworks outer tube, characterized in that, The device also includes: A wire bending connector includes a connector and a bending head. The connector is slidably disposed between the bending heads, and a compression spring and a stop are provided between the upper end of the connector and the bending head for bending the wire and inserting it into the outer cylinder hole and preventing the wire from being squeezed and damaged. A timing pulley assembly includes a timing pulley frame and a timing belt wound around the timing pulley. One side of the timing belt is fixedly connected to a punch pin fixing plate, and the punch pin fixing plate is connected to a double-headed punch pin. The other side of the timing belt is connected to an insertion drive block via a connecting rod. The punch driving device is configured as a punch driving cylinder, which is connected to the synchronous pulley frame and the synchronous pulley frame is mounted on a linear guide rail. The punch driving cylinder can drive the synchronous pulley frame to move up and down along the linear guide rail. The insertion drive device is configured as an insertion cylinder. The output end of the insertion cylinder is equipped with a roller. The insertion drive block is connected to the bending insertion head. The insertion drive block is equipped with a sliding groove. The roller is slidably embedded in the sliding groove. The insertion cylinder drives the bending insertion head to move up and down through the cooperation of the roller and the sliding groove. It also drives the double-headed punch to move up and down in the opposite direction to the bending insertion head through the transmission of the synchronous belt, so as to avoid interference between the double-headed punch and the bending insertion head.

2. The firework outer tube punching and insertion device according to claim 1, characterized in that, It also includes a lead wire guide groove limiting block, in which the bend head and the insertion head are both installed, and the lead wire guide groove limiting block is fixedly connected to the frame.

3. The firework outer tube punching and insertion device according to claim 1, characterized in that, It also includes a cutting device, which is configured as a cutting blade. The cutting blade is mounted on the frame. The insertion drive block is connected to the cutting blade through rollers. When the insertion drive block moves downward, it can drive the cutting blade to cut the lead wire synchronously. When the insertion drive block moves upward, the cutting blade is reset by a torsion spring.

4. The firework outer tube punching and insertion device according to claim 1, characterized in that, It also includes an automatic stop retraction device, which includes a stop and a return spring. The stop is located on the frame and below the bending insertion head. When the insertion cylinder moves down to a preset position, it can drive the stop to move backward. When the insertion cylinder returns to its original position, the stop is reset by the action of the return spring.

5. The firework outer tube punching and insertion device according to claim 1, characterized in that, The linear guide rail is fixed vertically to the frame, the synchronous pulley frame slides with the linear guide rail, and the piston rod of the punch drive cylinder extends and retracts vertically, driving the synchronous pulley frame to move linearly along the linear guide rail.

6. The firework outer tube punching and insertion device according to claim 1, characterized in that, The double-ended punch is a solid structure with sharp punched ends at both ends.

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