A buffer paper shell wrapping and folding device for an instrument transformer core

Abstract

The present invention provides a paper shell wrapping and folding device for a transformer core buffer, comprising a workbench, a reduction motor is fixedly installed at the lower part of the workbench through a motor bracket, the shaft of the reduction motor is connected to a transmission assembly, a fixed plate is fixedly connected to the upper part of the workbench, two fixed plates are connected by a bolt assembly, the transmission assembly is connected to a second folding assembly to drive the second folding assembly to rotate, the second folding assembly is installed on one side of the two fixed plates, the first folding assembly is installed on the other side of the two fixed plates, the first folding assembly is used to bend the paper shell at a 90-degree angle along the length center line, and the second folding assembly is used to press one side of the paper shell into a serrated shape. The present invention has a compact structure and a small size. The original flat paper shell is folded into a required 90-degree right-angled paper shell with a "serrated" side through the device, which can meet the fit of the outer contour of the core and meet the process quality requirements; it greatly improves the operating efficiency and reduces the operating intensity.

Description

Technical Field

[0001] The invention belongs to the technical field of auxiliary tooling for transformers, and particularly relates to a folding device for wrapping buffer paper shells around the core of a transformer. Background Art

[0002] During the production and manufacturing process of electrical product transformers, a layer of buffer material needs to be wrapped around the edges and corners of the secondary core inside the transformer. The main purpose of this process is to provide protective buffering for the core. Currently, the buffer material used is a paper shell, and the conventional specifications of the paper shell are 600×25×2 (mm). It is in a flat and intact state before processing. According to the design requirements, this protective buffer paper shell needs to be wrapped around the outer contour edges and corners of the core, which requires folding the paper shell into an approximate 90-degree angle before wrapping to meet this requirement.

[0003] Currently, the operation method for wrapping the secondary core with the paper shell is that the operator holds a flat paper shell in hand and gradually presses, folds, and smooths it along the periphery of the core by hand to make the paper shell as close as possible to the edges and corners of the core, and finally forms a closure, and then uses tape to bond and wrap it tightly. Since the shape of the secondary core is a rectangular window or a circular window structure, and the paper shell itself is in a flat and intact shape, and to meet the process requirements of protective buffering, a 2-mm thick paper shell must be used, and it should be as close as possible to the edges and corners of the core. In this way of operation and process requirements, and because the paper shell is relatively thick and the operation method is manual, there are often problems that the paper shell does not completely adhere to the core, especially at some edges and corners of the core, and there are often problems such as loose wrapping and gaps, which do not meet the process requirement state of effective combination and airtightness. This has led to the failure of the core buffer protection to meet the expected standard process requirements, and often there are product quality problems. Due to the thickness of this paper shell, it is difficult to fold, which also leads to disadvantages such as high labor intensity, low efficiency, and difficult operation. And it is used as soon as it is taken, and there are often problems such as mess and difficult management at the site. Moreover, this protective buffer paper shell has the characteristic of batch production. Except for special requirements, the cores of basically each transformer need to be wrapped with buffer paper shells, so the demand is large. It is difficult to meet the production demand simply by manual pressing and folding. Summary of the Invention

[0004] The technical problem solved by the present invention is to provide a folding device for wrapping buffer paper shells around the core of a transformer, which can pre-fold the paper shell according to the wrapping requirements through this device, and solves the problems of difficult folding of the paper shell, poor fit between the paper shell and the core after manual folding resulting in low product quality, high labor intensity, and low production efficiency.

[0005] The technical solution adopted by the present invention is as follows: A buffer paper shell wrapping and folding device for an instrument transformer core, including a workbench. The workbench has four legs and a workbench surface. A reduction motor is fixedly installed below the workbench surface through a motor bracket. The shaft of the reduction motor is connected to a transmission component. Above the workbench surface, a fixed plate is fixedly connected. The fixed plate is composed of two parts arranged in parallel. The two fixed plates are connected by a bolt assembly. The transmission component is connected to a second folding component to drive the second folding component to rotate. The second folding component is installed on one side inside the two fixed plates. On the other side inside the two fixed plates, a first folding component is installed. The first folding component is used to bend the paper shell at a 90-degree angle along the length center line. The second folding component is used to press one side of the paper shell into a serrated shape.

[0006] Preferably, the first folding component includes a groove wheel and a cam arranged vertically. The groove wheel is installed on the upper rotating shaft, and the cam is installed on the lower rotating shaft. The butt joint surface of the groove wheel and the cam forms a 90-degree angled gap. The gap spacing is the thickness of the paper shell. At the end of the lower rotating shaft extending outside the fixed plate, a rotating handle is installed. By rotating the rotating handle, the lower rotating shaft is controlled to drive the cam to rotate, thereby folding the paper shell into a shape with a 90-degree angled corner.

[0007] Preferably, the second folding component includes two gear transmission shafts arranged vertically. Gears are sleeved on the gear transmission shafts. The gear transmission shafts and the gears are located inside the fixed plate. The lower one is the first gear transmission shaft, and the upper one is the second gear transmission shaft. The two gears on the first gear transmission shaft and the second gear transmission shaft are meshed. By the meshing of the two gears, one side edge of the paper shell is pressed into a serrated shape.

[0008] Preferably, a first paper guiding slot is installed on the front side of the first folding component. One end of the first paper guiding slot is a connection end and the other end is a paper guiding end. A cylindrical through hole is processed on the connection end. It is installed inside the fixed plate through the bolt assembly passing through the cylindrical through hole. The paper guiding end is a rectangular structure, and a rectangular through hole is processed in the center. At the front end of the paper guiding end, the lower end surface of the rectangular through hole protrudes from the upper end surface. The size of the rectangular through hole is larger than the outer contour of the paper shell. The position of the rectangular through hole is opposite to the butt joint surface of the groove wheel and the cam. The first paper guiding slot facilitates guiding the paper shell to the position of the first folding component according to the folding position, improving the efficiency and the safety of the device.

[0009] Preferably, a second paper guiding slot opening is installed between the first folding assembly and the second folding assembly. The paper guiding structure of the second paper guiding slot opening is an L-shaped base with a bottom surface perpendicular to one of its side surfaces. A through hole is machined at the upper end of the side surface of the L-shaped base and is installed inside the fixed plate through a bolt assembly. A paper guiding slot block is fixed on the L-shaped base. The paper guiding slot block is machined with a paper guiding slot that penetrates through the front and back. The paper guiding slot is composed of a horizontal slot and a vertical slot at a 90-degree angle. The paper guiding slot and the side wall of the L-shaped base form an L-shaped slot hole. The length of the paper guiding slot block is less than the length of the L-shaped base and the paper guiding slot block is aligned with the rear end of the L-shaped base. The front side part of the side surface of the L-shaped base located in front of the paper guiding slot block is machined into a slope surface. The horizontal slot of the paper guiding slot faces the meshing part of the two gears, and the vertical slot is located outside the end face of the gear. The second paper guiding slot opening facilitates guiding one side of the paper shell to the gear meshing position of the second folding assembly according to the folding position to press and fold the paper shell, and provides support for the paper shell between the first folding assembly and the second folding assembly to facilitate the transmission of the paper shell, improving efficiency.

[0010] Preferably, a pulley is installed on the shaft of the reduction motor of the transmission assembly. A belt and gear assembly is installed on the first gear transmission shaft extending outside the fixed plate. One side of the belt and gear assembly is a pulley connected to the pulley through a belt. The other side of the belt and gear assembly is a gear that meshes with a transmission gear installed on the second gear transmission shaft extending outside the fixed plate. A through hole is machined on the workbench surface, and the belt passes through the through hole, enabling the reduction motor to provide power to drive the pulley to rotate and then transmit the power to the second folding assembly through the belt.

[0011] Preferably, gear limit adjusting plates are installed at both ends of the second gear transmission shaft. One end of the gear limit adjusting plate is connected to the second gear transmission shaft, and the other end is connected to the fixed plate through an adjusting rod, enabling the height of the second gear transmission shaft to be adjusted in the up and down direction on the fixed plate. A long hole is machined at the position of the second gear transmission shaft on the fixed plate, allowing the second gear transmission shaft to move up and down. After adjusting the height of the gear limit adjusting plate according to the characteristics such as the thickness and hardness of the paper shell to be processed, the gear limit adjusting plate is fixed so that the distance between the upper and lower gears meets the requirements.

[0012] The beneficial effects of the present invention are as follows: The structure of the present invention is compact and small in size. By means of this device, the original flat cardboard is folded in advance in batches into 90-degree right-angled cardboard with evenly spaced and regularly distributed "serrated" sides before use, and the serrations are uniform and defect-free, having a higher bending fit and arc ductility, which can meet the fit of the outer contour shape of the iron core. The cardboard processed by this folding device can be more effectively fitted with the iron core when bandaging the iron core, meeting the process quality requirements; greatly improving the operation efficiency and reducing the operation intensity; making it more convenient for the operator to use, improving the production efficiency, being easy to fold and bandage, and the folded cardboard can be managed according to batch inventory preparation, being neat and easy to manage on-site; the structure of the device itself is reasonable, and the components are properly connected, and one person can operate it skillfully. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 FIG. is a schematic structural diagram of a folding device for wrapping a buffer cardboard of an instrument transformer iron core;

[0014] Figure 2 FIG. is a schematic internal structure diagram of a folding device for wrapping a buffer cardboard of an instrument transformer iron core;

[0015] Figure 3 FIG. is a schematic left side view structure diagram of the folding device;

[0016] Figure 4 FIG. is a schematic structural diagram of a first folding assembly;

[0017] Figure 5 FIG. is a top view of the folding device;

[0018] Figure 6 FIG. is a schematic structural diagram of a first paper guiding slot opening;

[0019] Figure 7 FIG. is a schematic structural diagram of a second paper guiding slot opening.

[0020] Reference numerals: 1 - workbench, 2 - reduction motor, 3 - motor bracket, 4 - pulley, 5 - belt and gear assembly, 6 - belt, 7 - transmission gear, 8 - first gear transmission shaft, 9 - second gear transmission shaft, 10 - gear, 11 - fixing plate, 12 - rotating shaft, 13 - grooved wheel, 14 - cam, 15 - rotating handle, 16 - bolt assembly, 17 - first paper guiding slot opening, 18 - second paper guiding slot opening, 19 - gear limit adjusting plate, 20 - cardboard, 171 - connection end, 172 - paper guiding end, 181 - L-shaped base, 182 - paper guiding slot block, 183 - paper guiding slot. DETAILED DESCRIPTION OF THE INVENTION

[0021] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Among them, the direction of the packaging box is described from the Figure 1 perspective as follows. Taking one packaging box as a unit, the end face of the box body refers to Figure 1 the left and right side faces, and the side face refers to Figure 1 the plane and the back face shown, and the top face and the bottom face are Figure 1 the upper and lower sides in the view direction.

[0022] As Figures 1 to 3 shown, a buffer paper shell wrapping and folding device for an instrument transformer core includes a workbench 1. The workbench 1 is welded by square steel pipes and iron plates, and has four legs and a workbench surface. A reduction motor 2 is fixedly installed under the workbench surface through a motor bracket 3. A pulley 4 is installed on the shaft of the reduction motor 2. A fixing plate 11 is fixedly connected above the workbench surface. The fixing plate 11 is arranged in parallel in two. The two fixing plates are connected by a bolt assembly 16. The bolt assembly 16 is a long screw rod. External threads are processed at both ends of the long screw rod. The two ends with external threads pass through the fixing plates 11 on both sides and are locked by bolts to provide lateral support for the two fixing plates 11. A belt and gear assembly 5 is installed on the first gear transmission shaft 8 extending outside the fixing plate 11. One side of the belt and gear assembly 5 is a pulley connected to the pulley 4 through a belt 6. The other side of the belt and gear assembly 5 is a gear, and the gear meshes with a transmission gear 7 installed on the second gear transmission shaft 9 extending outside the fixing plate 11. A through hole is processed on the workbench surface, and the belt 6 passes through the through hole. The second folding assembly is driven to rotate through the belt 6, the pulley 4 and the belt and gear assembly 5. The second folding assembly is installed at the rear side inside the two fixing plates 11. The first folding assembly is installed at the front side inside the two fixing plates 11. The first folding assembly is used to bend the paper shell 20 at a 90-degree angle along the length center line, and the second folding assembly is used to press one side of the paper shell into a serrated shape.

[0023] As Figure 4 shown, the first folding assembly includes a grooved wheel 13 and a cam 14 arranged up and down. The grooved wheel 13 is installed on the upper rotating shaft 12, and the cam 14 is installed on the lower rotating shaft 12. The docking surfaces of the grooved wheel 13 and the cam 14 form a 90-degree folding angle gap, and the gap spacing is the thickness of the paper shell. A rotating handle 15 is installed at the end of the lower rotating shaft 12 extending outside the fixing plate 11. By rotating the rotating handle 15, the lower rotating shaft 12 is controlled to drive the cam 14 to rotate, and then the paper shell 20 is folded into a shape with a 90-degree folding angle.

[0024] As Figure 2As shown in the figure, the second folding assembly includes two gear transmission shafts arranged vertically. A gear 10 is sleeved on the gear transmission shaft. The gear transmission shaft and the gear 10 are located inside the fixed plate 11. The lower one is the first gear transmission shaft 8, and the upper one is the second gear transmission shaft 9. The two gears 10 on the first gear transmission shaft 8 and the second gear transmission shaft 9 are meshed. One side edge of the paper shell 20 is pressed into a serrated shape through the meshing gap of the two gears 10. When the serrated paper strip is bent into an arc shape, the serration density angle can be automatically adjusted according to the radian, which greatly meets the fitting degree between the paper shell 20 and the iron core. Gear limit adjusting plates 19 are installed at both ends of the second gear transmission shaft 9. One end of the gear limit adjusting plate 19 is connected to the second gear transmission shaft 9, and the other end is connected to the fixed plate 11 through an adjusting rod, which can adjust the height of the second gear transmission shaft 9 in the up and down direction on the fixed plate 11. As Figure 3 shown in the figure, a long hole is machined in the fixed plate 11 at the position of the second gear transmission shaft 9, so that the second gear transmission shaft 9 can move up and down. After adjusting the height of the gear limit adjusting plate 19 according to the characteristics such as the thickness and hardness of the paper shell to be processed, the gear limit adjusting plate 19 is fixed so that the distance between the upper and lower gears 10 meets the requirements.

[0025] As Figure 2 and Figure 6 shown in the figure, a first paper guiding slot 17 is installed on the front side of the first folding assembly. One end of the first paper guiding slot 17 is a connecting end 171 and the other end is a paper guiding end 172. A cylindrical through hole is machined in the connecting end 171, and it is installed inside the fixed plate 11 through a bolt assembly passing through the cylindrical through hole. And the first paper guiding slot 17 can adjust its position along the axial direction of the bolt assembly. The paper guiding end 172 is a rectangular structure, and a rectangular through hole is machined in the center. The lower end surface of the rectangular through hole at the front end of the paper guiding end 172 protrudes from the upper end surface to facilitate inserting the paper shell 20 into the rectangular through hole. The size of the rectangular through hole is larger than the outer contour of the paper shell 20, and the position of the rectangular through hole is opposite to the docking surface of the groove wheel 13 and the cam 14. The first paper guiding slot 17 facilitates guiding the paper shell 20 to the position of the first folding assembly according to the folding position. When operating, passing the paper shell 20 through the first paper guiding slot 17 avoids safety accidents caused by the operator's hand directly contacting the first folding assembly.

[0026] As Figure 2 and Figure 7As shown in the figure, a second paper guiding slot 18 is installed between the first folding component and the second folding component. The paper guiding structure of the second paper guiding slot 18 is an L-shaped base 181 with the bottom surface forming a right angle with one of its side surfaces. A through hole is machined at the upper end of the side surface of the L-shaped base 181 and is installed on the inner side of the fixing plate 11 through a bolt assembly. Moreover, the second paper guiding slot 18 can adjust its position along the axial direction of the bolt assembly. A paper guiding slot block 182 is fixed on the L-shaped base 181. The paper guiding slot block 182 is machined with a paper guiding slot 183 that penetrates through from front to back. The paper guiding slot 183 is composed of a horizontal slot and a vertical slot that form a 90-degree angle. The paper guiding slot 183 and the side wall of the L-shaped base 181 form an L-shaped slot hole. The length of the paper guiding slot block 182 is less than the length of the L-shaped base 181 and the paper guiding slot block 182 is aligned with the rear end of the L-shaped base 181, so that the front side of the L-shaped base 181 protrudes from the paper guiding slot block 182. The side surface of the L-shaped base 181 at the front side part of the paper guiding slot block 182 is machined into a slope surface, which is convenient for inserting the paper shell 20 into the L-shaped slot hole. The horizontal slot of the paper guiding slot 183 faces the meshing part of the two gears 10, and the vertical slot is located outside the end surface of the gear 10. The second paper guiding slot 18 is convenient for guiding one side of the paper shell 20 to the meshing position of the gear 10 of the second folding component according to the folding position to press-fold the paper shell 20, and provides support for the paper shell between the first folding component and the second folding component to facilitate the transmission of the paper shell.

[0027] During use, first install and adjust all the electrical components of the device, and fix the position after adjusting the height of the gear limit adjusting plate 19 according to the paper shell 20. After power on, the reduction motor 2 drives the pulley 4 to rotate, and drives the belt gear assembly 5 to rotate via the belt 6, thereby driving the transmission gear 7 to rotate, so that the first gear transmission shaft 8 and the second gear transmission shaft 9 rotate in opposite directions to make the gears 10 on the first gear transmission shaft 8 and the second gear transmission shaft 9 mesh and rotate with each other, making the rear half part of the whole device operate and rotate. Manually align the paper shell 20 with the first paper guiding slot 17 first until the paper shell 20 is pushed to the docking position of the groove wheel 12 and the cam 14 of the first folding component, and then manually rotate the handle 15 to bend the paper shell 20 by 90 degrees first. After folding, it is conducted to the slot of the second paper guiding slot 18, and then manually send the paper shell 20 folded by 90 degrees into the paper guiding slot 183, and finally bite the paper shell 20 into a serrated shape through the two gears 10 until the paper shell 20 is completely "ejected". As Figure 5 shown in the figure, the paper shell 20 enters from the right side of the figure and exits from the left side of the figure through the device. The whole process of a paper shell 20 is completed from the first paper guiding slot 17 to being completely folded out, which takes about 20 seconds, greatly improving the production efficiency.

[0028] The above are the specific embodiments of the present invention and the technical principles applied. Any modification and equivalent transformation based on the technical solution of the present invention should be included within the protection scope of the present invention.

Claims

1. A transformer core buffer paper shell wrapping and folding device, comprising a workbench (1), the workbench (1) having four legs and a workbench surface, a reduction motor (2) being fixedly mounted at the lower part of the workbench surface via a motor bracket (3), the shaft of the reduction motor (2) being connected to a transmission assembly, a fixed plate (11) being fixedly connected to the upper part of the workbench surface, the fixed plates (11) being two arranged in parallel, the two fixed plates (11) being connected via a bolt assembly (16), the transmission assembly being connected to a second folding assembly to drive the second folding assembly to rotate, the second folding assembly being mounted on one side of the two fixed plates (11), the first folding assembly being mounted on the other side of the two fixed plates (11), the first folding assembly being used to bend a paper shell (20) at an angle of 90 degrees along a length center line, and the second folding assembly being used to press one side of the paper shell (20) into a sawtooth shape The first folding component comprises a groove wheel (13) and a cam (14) arranged in an upper and lower manner, the groove wheel (13) being mounted on an upper rotating shaft (12), the cam (14) being mounted on a lower rotating shaft (12), the butt joint surfaces of the groove wheel (13) and the cam (14) forming a 90-degree angle gap, the gap spacing being the thickness of the paper shell (20), a rotating handle (15) being mounted on the end of the lower rotating shaft (12) extending out of the outer side of the fixed plate (11), and the second folding component comprises two gear transmission shafts arranged in an upper and lower manner, the gear transmission shafts being provided with gears (10), the gear transmission shafts and the gears (10) being located on the inner side of the fixed plate (11), the lower portion being a first gear transmission shaft (8), the upper portion being a second gear transmission shaft (9), the two gears (10) on the first gear transmission shaft (8) and the second gear transmission shaft (9) being meshed.

2. A transformer core buffer paper shell wrapping and folding device according to claim 1, characterized in that: A first paper guiding slot (17) is installed on the front side of the first folding assembly. One end of the first paper guiding slot (17) is a connecting end (171), and the other end is a paper guiding end (172). A cylindrical through hole is machined on the connecting end (171), and it is installed on the inner side of the fixing plate (11) through the bolt assembly passing through the cylindrical through hole. The paper guiding end (172) is of a rectangular structure, and a rectangular through hole is machined in the center. At the front end of the paper guiding end (172), the lower end surface of the rectangular through hole protrudes from the upper end surface. The size of the rectangular through hole is larger than the outer contour of the paper shell (20), and the position of the rectangular through hole is directly opposite to the butt joint surface of the groove wheel (13) and the cam (14).

3. A transformer core buffer paper shell wrapping and folding device according to claim 1, characterized in that: A second paper guiding slot (18) is installed between the first folding assembly and the second folding assembly. The paper guiding structure of the second paper guiding slot (18) is an L-shaped base (181) with a right angle between the bottom surface and one side surface. A through hole is machined at the upper end of the side surface of the L-shaped base (181) and it is installed on the inner side of the fixing plate (11) through the bolt assembly. A paper guiding slot block (182) is fixed on the L-shaped base (181). A paper guiding slot (183) that penetrates front and back is machined on the paper guiding slot block (182). The paper guiding slot (183) is composed of a horizontal slot and a vertical slot at a 90-degree angle. The paper guiding slot (183) and the side wall of the L-shaped base (181) form an L-shaped slot hole. The length of the paper guiding slot block (182) is less than the length of the L-shaped base (181), and the paper guiding slot block (182) is aligned with the rear end of the L-shaped base (181). The part of the side surface of the L-shaped base (181) located in front of the paper guiding slot block (182) is processed into a slope surface. The horizontal slot of the paper guiding slot (183) is directly opposite to the meshing part of the two gears (10), and the vertical slot is located outside the end surface of the gear (10).

4. A transformer core buffer paper shell wrapping and folding device according to claim 1, characterized in that: The transmission assembly is that a pulley (4) is installed on the shaft of the reduction motor (2). A pulley and gear assembly (5) is installed on the first gear transmission shaft (8) extending outside the fixing plate (11). One side of the pulley and gear assembly (5) is a pulley connected to the pulley (4) through a belt (6). The other side of the pulley and gear assembly (5) is a gear, and the gear meshes with a transmission gear (7) installed on the second gear transmission shaft (9) extending outside the fixing plate (11). A through hole is machined on the workbench surface, and the belt (6) passes through the through hole.

5. The transformer core buffer paper shell wrapping and folding device according to claim 1, characterized in that: Gear limit adjusting plates (19) are installed at both ends of the second gear transmission shaft (9). One end of the gear limit adjusting plate (19) is connected to the second gear transmission shaft (9), and the other end is connected to the fixing plate (11) through an adjusting rod, and it can adjust the height of the second gear transmission shaft (9) in the up and down direction on the fixing plate (11).

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