An improved structure of a mosquito coil stamping machine

Abstract

This utility model discloses an improved structure for a mosquito coil stamping and forming machine, including a frame, a stamping table, a stamping mechanism, and a hydraulic drive mechanism. The bottom of the stamping table is provided with support guide pillars for supporting the stamping table, with each support guide pillar correspondingly arranged around the perimeter of the stamping table. This improved structure of the mosquito coil stamping and forming machine, by providing support guide pillars around the bottom of the stamping table, supports the stamping table, distributes the force on the hydraulic cylinders, avoids the hydraulic cylinders bearing the weight alone, and ensures that the entire stamping table and the stamping mechanism above are evenly contacted with the force. This prevents the blank from being partially punched through the mold and thus forming mosquito coil blanks, improving the yield rate of the stamping and forming machine. Furthermore, lubricating oil is placed inside the support pillars, providing heat dissipation and lubrication for the guide pillars, effectively reducing deformation caused by severe wear and heat generation between the guide pillars and the fixed sleeve, and effectively extending the service life of the support guide pillars.

Description

Technical Field

[0001] This utility model belongs to the technical field of mosquito coil production equipment, and specifically relates to an improved structure of a mosquito coil stamping and forming machine. Background Technology

[0002] When producing mosquito coils, the wet mosquito coil material is usually extruded by an extruder and then stamped by a stamping machine to form a wet mosquito coil blank. After stamping, it enters the drying process. Traditionally, these processes are connected by manual operation. With the gradual development of technology, automatic mosquito coil forming machines have appeared on the market.

[0003] For example, the Chinese invention patent application filed with the State Intellectual Property Office, with authorization announcement number CN109228509B and titled "Fully Automatic Disc Mosquito Coil Production Device with Integrated Molding and Blank Collection," discloses a fully automatic disc mosquito coil production device integrating molding and blank collection. This device includes a stamping machine, an automatic blank collection machine, and a sieve. The stamping machine includes a stamping table and a stamping mechanism; the automatic blank collection machine includes a blank collection main frame and a blank suction device. A first sieve channel is formed at the bottom of the blank collection main frame 1, and the blank suction device is located directly above the first sieve channel. The stamping mechanism 3 reciprocates between the stamping table and the demolding station, and the input end of the sieve is connected to the output end of the sieve plate of the blank suction device. This invention, through the setting of the sieve frame, allows the empty mosquito coil sieve trays after blank collection to be transported to the demolding station to carry the wet mosquito coil blanks. The stamping and forming process is smoothly connected with the blank collection process, resulting in high utilization rate of the mosquito coil sieve trays, high production efficiency, and fully automated production. Compared with the traditional method, it greatly improves the operating efficiency and saves a lot of labor costs.

[0004] The stamping machine in the aforementioned mosquito coil production apparatus includes a frame, a press table mounted on the frame and capable of being raised and lowered, a stamping mechanism positioned above the press table, and a stamping belt passing between the press mechanism and the press table. The press mechanism is equipped with a stamping die and a stamping drive device that drives the press mechanism to move horizontally. The press table is raised and lowered by a hydraulic cylinder located below it. The press mechanism has gear racks on both sides. The stamping drive device includes a motor mounted on the top of the press machine frame, a gear shaft with gears, and the motor's output shaft is connected to the gear shaft via a reduction gearbox. The gears are arranged corresponding to the gear racks. A slider is located at the bottom of the press mechanism, and a slide rail is provided on the frame, allowing the slider to slide on the slide rail. During operation, the hydraulic cylinder at the bottom pushes the stamping table upward, corresponding to the blank on the stamping table and the stamping die of the stamping mechanism waiting directly above the stamping table to form a stamping process. After the stamping is completed, the hydraulic cylinder descends, and at the same time, the motor at the top of the frame drives the gear shaft to rotate, which in turn causes the stamping mechanism to move horizontally, so that the stamping mechanism moves from directly above the stamping table to the demolding station.

[0005] Although the aforementioned mosquito coil production device enables automatic transfer and connection of mosquito coils in various processes, the applicant found during use that in its stamping forming machine, the stamping table is supported only by the hydraulic cylinder at the bottom. This causes the hydraulic cylinder to be under high pressure and single load for a long time, affecting its service life. Furthermore, the fact that the stamping table is supported only by the hydraulic cylinder at the bottom leads to uneven force distribution between the center and the periphery of the stamping table. As a result, some blanks located around the stamping table cannot be fully formed with the stamping mold above during the stamping process. Consequently, some blanks cannot penetrate the mold and thus cannot form mosquito coil blanks, affecting the yield rate.

[0006] In view of this, the applicant conducted in-depth research on the above-mentioned issues, which led to the occurrence of this case. Summary of the Invention

[0007] The purpose of this invention is to provide an improved structure for a mosquito coil stamping machine, which can effectively avoid the problem of uneven force on the stamping table and improve the yield of stamped products.

[0008] To achieve the above objectives, this utility model adopts the following technical solution: An improved structure of a mosquito coil stamping machine includes a frame, a press table that can be raised and lowered on the frame, a stamping mechanism that can be slidably disposed above the press table, and a hydraulic drive mechanism disposed at the bottom of the press table for driving the press table to rise and fall. A stamping die is mounted on the stamping mechanism. The bottom of the press table is also provided with several support guide pillars for supporting the press table. Each support guide pillar is respectively disposed around the perimeter of the press table. Each support guide pillar includes an outer support column body, a fixed sleeve fixed within the support column body, and a guide pillar slidably disposed inside the fixed sleeve. The upper end of the guide pillar is fixedly connected to the bottom of the press table, and the lower end of the guide pillar extends out of the fixed sleeve and is located within the support column body. The support column body has an oil injection hole, and lubricating oil is filled between the fixed sleeve and the support column body. A gap exists between the middle part of the fixed sleeve and the guide pillar, and an opening is provided in the middle part of the fixed sleeve for the lubricating oil from the support column body to flow into the gap.

[0009] Furthermore, two oil-impregnated bushings are provided between the fixed sleeve and the guide post, and the two oil-impregnated bushings are respectively fixed to the upper and lower parts of the fixed sleeve.

[0010] Furthermore, the upper part of the support column is provided with a first fixed frustum, and the upper part of the fixed sleeve is correspondingly provided with a second fixed frustum. The second fixed frustum is located on top of the first fixed frustum, and the first fixed frustum and the second fixed frustum are fixedly connected by fasteners.

[0011] Furthermore, the frame is provided with a stamping drive device for driving the stamping mechanism to move horizontally. The stamping mechanism has racks on both sides. The stamping drive device includes guide rails, gear shafts, and gears connected to the gear shafts on both sides of the frame. The two racks are respectively arranged above the guide rails on both sides. The gears are arranged corresponding to the racks and mesh with the racks. The stamping mechanism is slidably arranged on the guide rails on both sides. The stamping drive device also includes a drive motor for driving the gear shafts on both sides to rotate synchronously. The output end of the drive motor is connected to the gear shafts on both sides through a transmission assembly.

[0012] Furthermore, the drive motor is mounted in the middle of the frame, and the transmission assembly includes a first steering gear disposed at the output end of the drive motor, and a second steering gear and a third steering gear respectively connected to both sides of the first steering gear. The output ends of the second steering gear and the third steering gear are respectively connected to the input ends of the gear shafts on both sides.

[0013] Furthermore, the first steering gear and the second steering gear, the first steering gear and the third steering gear, the output end of the second steering gear and the input end of the gear shaft on the corresponding side, and the output end of the third steering gear and the input end of the gear shaft on the corresponding other side are all connected by expansion sleeves.

[0014] By adopting the aforementioned design scheme, the beneficial effects of this utility model are: The improved structure of this mosquito coil stamping machine involves installing support guide pillars at the four corners of the bottom of the stamping table. These pillars support the stamping table, distributing the force on the hydraulic cylinders and preventing them from bearing the weight alone. When the hydraulic cylinders lift and move the stamping table upwards for stamping, the support guide pillars ensure that the lifting force is evenly distributed across the entire horizontal plane of the stamping table. This allows the entire stamping table to maintain uniform contact with the stamping mechanism above, preventing partial contact between the workpiece and the upper stamping mechanism during the stamping process. The inability of the model to fully bear the force for forming results in some blanks not being able to penetrate the mold and thus failing to form mosquito coil blanks, effectively improving the yield of the stamping forming machine; and the installation of lubricating oil between the fixed sleeve and the support column allows the guide column to be buffered by the lubricating oil when descending, resulting in smoother lifting and lowering. The lubricating oil can enter the gap between the fixed sleeve and the guide column through the opening in the oil injection space, providing heat dissipation and lubrication for the guide column, effectively reducing the deformation caused by severe wear and heat in the guide column and fixed sleeve, and effectively extending the service life of the support guide column.

[0015] Furthermore, the oil-impregnated bushing achieves low-friction operation of the guide post through lubrication, further reducing direct contact wear between the guide post and the fixed sleeve.

[0016] Furthermore, the drive motor drives both sides of the stamping mechanism to move stably and synchronously through the mechanical connection structure of each steering gear. The mechanical connection structure of this steering gear can effectively avoid the problem of the traditional two motors controlling the gear shafts on both sides separately and making it difficult to synchronize, thus effectively improving the stability of the stamping mechanism's movement. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the improved mosquito coil stamping machine of this utility model.

[0018] Figure 2 This is a structural schematic diagram of the stamping table from a bottom-up perspective in the improved structure of the mosquito coil stamping machine of this utility model.

[0019] Figure 3 This is a cross-sectional schematic diagram of the supporting guide column in the improved structure of the mosquito coil stamping machine of this utility model.

[0020] In the picture: 1-Frame; 10-Hydraulic drive mechanism; 2-Pressing table; 3-Pressing mechanism; 30 - rack and pinion; 31 - guide rail; 32 - Gear shaft; 33 - Gear; 34 - Drive motor; 4- Supporting guide post; 41- Supporting column body; 42-Fixing sleeve; 43-Guide post; 44 - Oil-impregnated bushing; 45 - Limiting clamp; 411 - Oil injection hole; 412 - Oil filling space; 413 - First fixed frustum; 421 - Gap; 422 - Opening; 423 - Second fixed frustum; 51 - First steering mechanism; 52 - Second steering gear; 53 - Third steering gear; 6-Tightening sleeve. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figures 1 to 3 As shown, an improved structure of a mosquito coil stamping and forming machine includes a frame 1, a press table 2 that can be raised and lowered on the frame 1, a stamping mechanism 3 that can be slidably disposed above the press table 2, and a hydraulic drive mechanism 10 disposed at the bottom of the press table 2 for driving the press table 2 to rise and fall. A stamping die (not shown in the figure) is mounted on the press mechanism 3. Preferably, the hydraulic drive mechanism 10 is a hydraulic cylinder. It should be noted that this utility model is an improvement on the existing stamping and forming machine, such as the stamping and forming machine disclosed in the Chinese invention patent with authorization announcement number "CN109228509B" and title "Fully Automatic Disc-Type Mosquito Coil Production Device with Integrated Molding and Blank Collection" mentioned in the background art. The press table 2, the press mechanism 3, the hydraulic drive mechanism 10, and the stamping die in this utility model are all structures disclosed in the above-mentioned patent.

[0023] The main improvement of this utility model is that: the bottom of the stamping table 2 is also provided with a number of support guide columns 4 for supporting the stamping table 2. Each support guide column 4 is respectively arranged around the stamping table 2. Preferably, the stamping table 2 in this embodiment is square, and correspondingly, the bottom of the stamping table 2 is provided with support guide columns 4 corresponding to the positions of the four corners. Specifically, the bottom of the frame 1 has a base, and the bottom of the hydraulic drive mechanism 10 and each support guide column 4 are fixed on the base. The support guide column 4 includes an external support column body 41 and a fixed part inside the support column body 41. The fixed sleeve 42 and a guide post 43 slidably disposed inside the fixed sleeve 42 are provided. The upper end of the guide post 43 is fixedly connected to the bottom of the stamping table 2, and the lower end of the guide post 43 extends out of the fixed sleeve 42 and is located inside the support column 41. The top of the support column 41 has an inlet for the fixed sleeve 42 to extend into. The fixed sleeve 42 is inserted into the support column 41 through the inlet at the top of the support column 41 and is fixedly connected to the support column 41. The support column 41 is provided with an oil injection hole 411, and lubricating oil is filled between the fixed sleeve 42 and the support column 41. The outer side and bottom of the fixed sleeve 42 and the inner side wall of the support column 41 have an oil injection space 412 for injecting lubricating oil. Lubricating oil is injected into the oil injection space 412 in the support column 41 through the oil injection hole 411. The oil injection hole 411 can play the role of oil injection and air venting. There is a gap 421 between the middle part of the fixed sleeve 42 and the guide column 43. The middle part of the fixed sleeve 42 has an opening 422 for the lubricating oil in the support column 41 to flow into the gap 421. Since the upper end of the guide column 43 is fixed to the bottom of the stamping table 2, when the hydraulic drive mechanism 1 When the stamping table 2 is raised and lowered, the guide column 43 moves up and down inside the fixed sleeve 42. When the guide column 43 moves downward, it extends out of the bottom of the fixed sleeve 42 and into the oil filling space 412. This allows the lubricating oil in the oil filling space 412 to provide a certain buffering effect on the guide column 43. When the guide column 43 moves up and down, it will drive the lubricating oil from the opening 422 into the gap 421 of the fixed sleeve 42. The lubricating oil in the gap 421 can reduce the friction between the guide column 43 and the fixed sleeve 42 and provide a certain heat dissipation effect.

[0024] The improved structure of this mosquito coil stamping machine involves providing support guide pillars 4 at the four corners of the bottom of the stamping table 2. These support guide pillars 4 support the stamping table 2, distributing the force on the hydraulic cylinder and preventing it from bearing the load alone. When the hydraulic cylinder lifts and moves the stamping table 2 upwards for stamping, the support guide pillars 4 evenly distribute the lifting force of the stamping table 2 across its entire horizontal plane. This ensures that the entire stamping table 2 can maintain uniform contact with the stamping mechanism 3 above, preventing situations where parts of the blank cannot fully bear the force with the stamping mold during the stamping process. The forming process prevents some blanks from being punched through the mold and thus failing to form mosquito coil blanks, effectively improving the yield of the stamping forming machine. Furthermore, lubricating oil is placed between the fixed sleeve 42 and the support column 41, allowing the guide column 43 to be buffered by the lubricating oil when it descends, resulting in smoother lifting and lowering. The lubricating oil can enter the gap 421 between the fixed sleeve 42 and the guide column 43 from the oil injection space 412 through the opening 422, providing heat dissipation and lubrication for the guide column 43. This effectively reduces the deformation of the guide column 43 and the fixed sleeve 42 due to severe wear and heat, effectively extending the service life of the support guide column 4.

[0025] Preferably, two oil-impregnated bushings 44 are also provided between the fixed sleeve 42 and the guide post 43. The two oil-impregnated bushings 44 are fixedly installed on the upper and lower parts of the fixed sleeve 42, respectively. Specifically, the upper and lower parts of the fixed sleeve 42 are provided with mounting grooves. The two oil-impregnated bushings 44 are respectively installed in the mounting grooves of the upper and lower parts of the fixed sleeve 42, and are fixed in the fixed sleeve 42 by limiting clamps 45. It should be noted that the oil-impregnated bushings 44 (or oil-impregnated bearings) in this utility model are products that can be purchased on the market. The oil-impregnated bushings 44 achieve low-friction operation of the guide post 43 through lubrication, further reducing the direct contact wear between the guide post 43 and the fixed sleeve 42.

[0026] Preferably, the upper part of the support column 41 is provided with a first fixed frustum 413, and the upper part of the fixed sleeve 42 is correspondingly provided with a second fixed frustum 423. The second fixed frustum 423 is located on top of the first fixed frustum 413. The first fixed frustum 413 and the second fixed frustum 423 are fixedly connected by fasteners. Specifically, the first fixed frustum 413 and the second fixed frustum 423 are provided with the same threaded holes. The fasteners pass through the threaded holes on the first fixed frustum 413 and the second fixed frustum 423 and lock them to fix the two. Other conventional fixing methods can also be used.

[0027] The frame 1 is equipped with a stamping drive device for driving the stamping mechanism 3 horizontally to the demolding mechanism (not shown in the figure). Racks 30 are fixed on both sides of the stamping mechanism 3. Specifically, the stamping drive device includes guide rails 31, a gear shaft 32, and a gear 33 connected to the gear shaft 32, respectively disposed on both sides of the frame 1. Two racks 30 are respectively disposed above the guide rails 31 on both sides. The gear 33 is disposed corresponding to and meshes with the racks 30. The bottom sides of the stamping mechanism 3 are slidably mounted on the guide rails 31 on both sides via pulleys. It should be noted that... In the prior art (such as the scheme described in the background art), two motors are usually set at the top of the stamping mechanism 3 to drive the gear shaft 32 to rotate. The two motors are respectively set on both sides of the frame 1. The two motors drive the gear shaft 32 and gear 33 on both sides to rotate, thereby driving the stamping mechanism 3 to move horizontally on the guide rail 31. However, with this setting, after a period of use, the two motors often cannot be completely synchronized. This will affect the stability of the movement of the stamping mechanism 3, and may even cause the stamping mechanism 3 to malfunction, thus affecting the operation of the entire production equipment.

[0028] To avoid the above problems, such as Figure 1 As shown, in this utility model, the stamping drive device also includes a drive motor 34 disposed at the top of the frame 1 for driving the gear shafts 32 on both sides to rotate synchronously. The output end of the drive motor 34 is synchronously transmitted to the gear shafts 32 on both sides through a transmission assembly. Specifically, the drive motor 34 is installed in the middle of the top of the frame 1. The transmission assembly includes a first steering gear 51 disposed at the output end of the drive motor 34, and a second steering gear 52 and a third steering gear 53 respectively connected to the two sides of the first steering gear 51. The output ends of the second steering gear 52 and the third steering gear 53 are respectively connected to the input ends of the gear shafts 32 on both sides. The first steering gear 51, the second steering gear 52 and the third steering gear 53 in this utility model can all adopt the existing conventional steering gear structure.

[0029] In this embodiment, the drive motor 34 is preferably a conventional servo motor in the art. The servo motor transmits power synchronously to the gear shafts 32 on both sides through the first steering gear 51 via the second steering gear 52 and the third steering gear 53 on both sides. The rotation of the gear shafts 32 on both sides drives the gears 33 on both sides to rotate synchronously, so that the gears 33 can drive the racks 30 to move. Since the racks 30 are fixed on both sides of the stamping mechanism 3, the gears 33 can drive the racks 30 on both sides to move synchronously, thereby making the entire stamping mechanism 3 move horizontally and stably to the demolding mechanism. With this configuration, the drive motor 34 drives both sides of the stamping mechanism 3 to move stably and synchronously through the mechanical connection structure of each steering gear. Compared with the prior art, the mechanical connection structure of this steering gear can effectively avoid the problem of difficulty in synchronizing the gear shafts 32 on both sides when the two motors are controlled separately in the traditional way, and effectively improve the stability of the movement of the stamping mechanism 3.

[0030] Correspondingly, first connecting shafts extend from both sides of the first steering gear 51 at positions corresponding to the second steering gear 52 and the third steering gear 53. Second connecting shafts extend from both sides of the second steering gear 52 corresponding to the first steering gear 51 and the gear shaft 32 below it. Third connecting shafts extend from both sides of the third steering gear 53 corresponding to the first steering gear 51 and the gear shaft 32 below it. Preferably, the first connecting shaft of the first steering gear 51 and the second connecting shaft of the second steering gear 52, the first connecting shaft of the first steering gear 51 and the third connecting shaft of the third steering gear 53, the second connecting shaft of the second steering gear 52 and the gear shaft 32 on the corresponding side, and the third connecting shaft of the third steering gear 53 and the gear shaft 32 on the corresponding other side are all connected by a tightening sleeve 6. The tightening sleeve 6 is a conventional keyless connection device. Its principle and purpose are to generate a huge clamping force between the inner ring and the shaft and between the outer ring and the hub through the action of high-strength tension bolts, so as to realize the keyless connection between the machine parts and the shaft or between the shafts. When under load, the torque, axial force, or a combination of both are transmitted through the contact pressure between the expansion sleeve and the machine parts / shafts, as well as the resulting friction. Expansion sleeve connections offer advantages such as easy installation and disassembly, high strength, and stable and reliable connection, thus improving the stability of the connection between various shafts.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An improved structure of a mosquito coil stamping and forming machine, comprising a frame, a press table that can be raised and lowered and mounted on the frame, a stamping mechanism that can be slidably mounted above the press table, and a hydraulic drive mechanism disposed at the bottom of the press table for driving the press table to rise and fall, wherein a stamping die is mounted on the stamping mechanism, characterized in that, The bottom of the stamping table is also provided with several support guide pillars for supporting the stamping table. Each support guide pillar is respectively arranged around the stamping table. Each support guide pillar includes an outer support column body, a fixed sleeve fixed in the support column body, and a guide pillar slidably arranged inside the fixed sleeve. The upper end of the guide pillar is fixedly connected to the bottom of the stamping table, and the lower end of the guide pillar extends out of the fixed sleeve and is located in the support column body. The support column body is provided with an oil injection hole. Lubricating oil is filled between the fixed sleeve and the support column body. There is a gap between the middle part of the fixed sleeve and the guide pillar. An opening is provided in the middle part of the fixed sleeve for the lubricating oil in the support column body to flow into the gap.

2. The improved structure of the mosquito coil stamping machine according to claim 1, characterized in that, Two oil-impregnated bushings are also provided between the fixed sleeve and the guide post, and the two oil-impregnated bushings are respectively fixed to the upper and lower parts of the fixed sleeve.

3. The improved structure of the mosquito coil stamping machine according to claim 1, characterized in that, The upper part of the support column is provided with a first fixed truncated cone, and the upper part of the fixed sleeve is provided with a second fixed truncated cone. The second fixed truncated cone is located on top of the first fixed truncated cone, and the first fixed truncated cone and the second fixed truncated cone are fixedly connected by fasteners.

4. The improved structure of the mosquito coil stamping machine according to claim 1, characterized in that, The frame is equipped with a stamping drive device for driving the stamping mechanism to move horizontally. The stamping mechanism has racks on both sides. The stamping drive device includes guide rails, gear shafts, and gears connected to the gear shafts on both sides of the frame. The two racks are respectively arranged above the guide rails on both sides. The gears are arranged corresponding to the racks and mesh with them. The stamping mechanism is slidably arranged on the guide rails on both sides. The stamping drive device also includes a drive motor for driving the gear shafts on both sides to rotate synchronously. The output end of the drive motor is connected to the gear shafts on both sides through a transmission assembly.

5. The improved structure of the mosquito coil stamping machine according to claim 4, characterized in that, The drive motor is mounted in the middle of the frame. The transmission assembly includes a first steering gear disposed at the output end of the drive motor, and a second steering gear and a third steering gear respectively connected to both sides of the first steering gear. The output ends of the second steering gear and the third steering gear are respectively connected to the input ends of the gear shafts on both sides.

6. The improved structure of the mosquito coil stamping machine according to claim 5, characterized in that, The first steering gear and the second steering gear, the first steering gear and the third steering gear, the output end of the second steering gear and the input end of the gear shaft on the corresponding side, and the output end of the third steering gear and the input end of the gear shaft on the corresponding other side are all connected by a tightening sleeve.

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