A metal film flexible straight capacitor core winding system

Abstract

A metal film flexible capacitor core winding system, belonging to the technical field of capacitor winding equipment, includes a back plate with a winding assembly on its front side. The winding assembly's spool is perpendicular to the back plate, and four feeding assemblies are horizontally positioned at the lower end of the back plate. Each feeding assembly includes a horizontally positioned rectangular frame whose length is aligned with the width of the back plate. A semi-circular groove is formed in the middle of the top surface of the two long sides of the rectangular frame to support the main shaft. Above the semi-circular groove is a vertically movable pressure rod. A downwardly extending bracket is located on the outer side of the rectangular frame corresponding to the pressure rod. The lower end of the bracket is rotatably connected to a swing plate, with the axis of rotation parallel to the long side of the rectangular frame. The front end of the swing plate extends to the bottom of the rectangular frame, and a counterweight is located at the rear end of the swing plate, outside the bracket. This design shortens the transmission path of each diaphragm, effectively reducing the risk of diaphragm misalignment and minimizing material waste.

Description

Technical Field

[0001] This invention belongs to the technical field of capacitor winding equipment, and particularly relates to a metal film flexible straight capacitor core winding system. Background Technology

[0002] Metal film flexible capacitors are mainly formed by winding overlapping positive and negative metal films and separators. Existing winding equipment typically uses multiple tension rollers to tension the films and guide rollers to design the movement trajectory of each film as a zigzag structure in order to ensure the films are taut during winding and prevent wrinkling. While this method ensures the films remain taut during winding and thus prevents wrinkling, the increased number of tension rollers and guide rollers lengthens the film's transport path, increasing the risk of film misalignment along its width during transport. Furthermore, the longer transport path results in excessively long sections of film that cannot be wound at the end of each roll, leading to excessive material waste. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a metal film flexible straight capacitor core winding system, which has a shorter transmission path for each diaphragm, effectively reducing the risk of diaphragm misalignment and minimizing raw material waste.

[0004] In order to achieve the objective of this invention, the following solution is proposed:

[0005] A metal film flexible capacitor core winding system includes: a vertically arranged back plate, a winding assembly at the upper end of the front side of the back plate, the winding axis of the winding assembly being perpendicular to the back plate, and four sets of feeding assemblies at the lower end of the back plate in a horizontal direction, which are used to sequentially set the positive electrode film roll, the first diaphragm roll, the negative electrode film roll, and the second diaphragm roll.

[0006] The feeding assembly includes a horizontally arranged rectangular frame whose length direction is consistent with the width direction of the back plate. A semi-circular groove is provided in the middle of the top surface of the two long sides of the rectangular frame to support the main shaft. A pressure rod is provided above the semi-circular groove and is moved vertically. A bracket extending downward is provided on the outer side of the rectangular frame corresponding to the pressure rod. The lower end of the bracket is rotatably connected to a swing plate, and the axis of rotation is parallel to the long side of the rectangular frame. The front end of the swing plate extends to the bottom of the rectangular frame, and a counterweight is provided at the rear end of the swing plate. The counterweight is located on the outer side of the bracket.

[0007] The beneficial effects of this invention are: it effectively shortens the transmission distance of the diaphragm, effectively reduces the risk of diaphragm deviation, and reduces the waste of raw materials; it eliminates the need for excessive tensioning rollers and transition rollers, and can still keep the diaphragm under tension at all times, thereby avoiding wrinkles. Attached Figure Description

[0008] The accompanying drawings described herein are merely illustrative of selected embodiments, not all possible implementations, and are not intended to limit the scope of the invention.

[0009] Figure 1 A front view of the overall structure of this application is shown.

[0010] Figure 2 A bottom view of the overall structure of this application is shown.

[0011] Figure 3 An exploded view of the feeding assembly is shown.

[0012] Figure 4 A schematic diagram of the initial feeding assembly during the winding process is shown.

[0013] Figure 5 A schematic diagram of the state of the post-winding feeding assembly is shown.

[0014] Figure 6 A bottom view of the feeding assembly is shown.

[0015] The markings in the diagram are: back plate-1, strip hole-11, winding assembly-2, roll-up-21, slider-22, support spring-23, roller-24, feeding assembly-3, rectangular frame-31, semi-circular groove-311, positioning rod-312, guide rod-313, pressure rod-32, bracket-321, positioning hole-322, swing plate-33, top rod-331, counterweight-34, support plate-35, strip groove-351, screw-36, positive electrode membrane roll-41, first diaphragm roll-42, negative electrode membrane roll-43, second diaphragm roll-44, main shaft-45, pressure roller-51, and pressure spring-52. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the implementation methods of the present invention will be described in detail below with reference to the accompanying drawings. However, the embodiments described in this invention are only some embodiments of the present invention, and not all embodiments.

[0017] like Figure 1 , Figure 2 As shown, a metal film flexible capacitor core winding system includes: a vertically arranged back plate 1, with a winding assembly 2 at the upper end of its front side, the winding assembly 2 having a spool 21 perpendicular to the back plate 1, and the spool 21 being driven by a motor. Four sets of feeding assemblies 3 are arranged horizontally at the lower end of the back plate 1, for sequentially setting a positive electrode film roll 41, a first diaphragm roll 42, a negative electrode film roll 43, and a second diaphragm roll 44.

[0018] In a common implementation scheme, the main shafts 45 of the positive electrode film roll 41, the first separator roll 42, the negative electrode film roll 43, and the second separator roll 44 are all parallel to the roll 21. The positive electrode film, the first separator, the negative electrode film, and the second separator are respectively fed to the winding assembly 2 through the positive electrode film roll 41, the first separator roll 42, the negative electrode film roll 43, and the second separator roll 44, and finally wound by the winding assembly 2 to form a capacitor core.

[0019] Specifically, such as Figures 1 to 6 As shown, the feeding assembly 3 includes a horizontally arranged rectangular frame 31, the length of which is consistent with the width of the back plate 1. A semi-circular groove 311 is provided in the middle of the top surface of the two long sides of the rectangular frame 31 to support the main shaft 45. A pressure rod 32 is provided above the semi-circular groove 311 and moves vertically. A downwardly extending bracket 321 is provided on the outer side of the rectangular frame 31 corresponding to the pressure rod 32. The lower end of the bracket 321 is rotatably connected to the swing plate 33, and the axis of rotation is parallel to the long side of the rectangular frame 31. The front end of the swing plate 33 extends to the bottom of the rectangular frame 31, and a counterweight 34 is provided at the rear end of the swing plate 33. The counterweight 34 is located on the outer side of the bracket 321.

[0020] When the positive electrode membrane roll 41, the first separator roll 42, the negative electrode membrane roll 43 and the second separator roll 44 are placed on the corresponding feeding assembly 3, the two ends of the main shaft 45 are respectively supported in the semi-circular grooves 311 on both sides of the rectangular frame 31 and located below the corresponding pressure rod 32. Under the action of the counterweight 34, the front end of the swing plate 33 will contact the lower edge of the corresponding membrane roll and exert upward pressure on the membrane roll. Furthermore, since the weight of the swing plate 33 and the counterweight 34 is supported by the bracket 321 and the pressure rod 32, the pressure rod 32 will also press against the upper surface of the main shaft 45. By applying pressure to the membrane roll and the main shaft 45, the positive electrode membrane, the first separator, the negative electrode membrane and the second separator need to overcome a certain resistance when they are pulled out, so as to prevent the positive electrode membrane roll 41, the first separator roll 42, the negative electrode membrane roll 43 and the second separator roll 44 from being easily pulled out, and to avoid the positive electrode membrane, the first separator, the negative electrode membrane and the second separator from being pulled out too much and losing tension, thereby preventing wrinkles from occurring during winding.

[0021] The above-mentioned structure effectively shortens the transmission distance of the membrane, effectively reduces the risk of membrane displacement, and reduces the waste of raw materials; without the need for too many tensioning rollers and transition rollers, the membrane between the roll 21 and each membrane roll can always maintain tension, thus avoiding wrinkles; the above-mentioned membrane includes a positive electrode membrane, a first separator, a negative electrode membrane, and a second separator.

[0022] In the initial stage of winding, each film roll still has a lot of residual material, and the weight of the film roll is also at its maximum. In addition to the pressure applied to the film roll and the main shaft 45, the weight of the film roll itself also exerts pressure on the main shaft 45, causing the main shaft 45 to exert pressure on the semi-circular groove 311, thereby increasing the rotational resistance when the film roll exits. In the initial stage of winding, the outer diameter of the film roll is also at its maximum, so the angle between the swing plate 33 and the horizontal plane is relatively large. Therefore, in the horizontal projection, the distance between the rotation axis of the swing plate 33 and the counterweight 34 is the smallest. At this time, the downward pressure exerted by the counterweight 34 on the pressure rod 32 is minimal, and the upward pressure exerted by the front end of the swing plate 33 on the film roll is also minimal. However, in the initial stage, because the weight of the film roll itself is relatively large, it can also generate sufficient resistance between the main shaft 45 and the semi-circular groove 311 to ensure the tension of each diaphragm. As the winding continues, the weight and outer diameter of the film roll will gradually decrease. When the outer diameter decreases... At the same time, the distance between the front end of the swing plate 33 and the main shaft 45 will also decrease, causing the front end of the swing plate 33 to descend and the angle between the swing plate 33 and the horizontal plane to decrease. However, the distance between the rotation axis of the swing plate 33 and the counterweight 34 will increase. When the distance increases and the weight of the counterweight 34 remains unchanged, the downward pressure generated by the counterweight 34 on the pressure rod 32 will increase, and the upward pressure generated by the front end of the swing plate 33 on the film roll will also increase. As can be seen from the above, although the pressure generated by the weight of the film roll on the main shaft 45 decreases as the winding work progresses, the pressure generated by the counterweight 34 on the main shaft 45 through the pressure rod 32 increases to compensate for the pressure drop caused by the decrease in the weight of the film roll. This ensures that each film roll has sufficient resistance during the subsequent discharge process, thus ensuring that each film sheet has sufficient tension in both the initial and later stages of winding, thereby preventing wrinkles from occurring during the winding process.

[0023] Preferred, such as Figures 3 to 5 As shown, the top surface of the rectangular frame 31 is provided with vertical positioning rods 312 on both sides of the semicircular groove 311. The pressure rod 32 is provided with positioning holes 322 for connecting the positioning rods 312. The relative position between the pressure rod 32 and the rectangular frame 31 is limited by the cooperation between the positioning rod 312 and the positioning hole 322, so that the pressure rod 32 can only move in the vertical direction. Before placing each film roll, the pressure rod 32 is first removed from the rectangular frame 31. After the two ends of the main shaft 45 are placed into the semicircular groove 311, the pressure rod 32 is then installed on the rectangular frame 31. Under the gravity of the counterweight 34, the front end of the swing plate 33 will automatically rise and press under the film roll.

[0024] Alternatively, the positioning hole 322 can be made on the rectangular frame 31, and the positioning rod 312 can be set at the bottom of the pressure rod 32.

[0025] Preferred, such as Figures 3 to 6As shown, a support plate 35 is provided parallel to the bottom of the rectangular frame 31. Vertical guide rods 313 are provided on the inner walls of the two short sides of the rectangular frame 31. The two ends of the support plate 35 are slidably mounted on the two guide rods 313. The support plate 35 is located above the front end of the swing plate 33. This scheme uses the pressure generated by the counterweight 34 to drive the front end of the swing plate 33 to swing upward, thereby generating an upward supporting force on the support plate 35. Due to the influence of the installation structure of the swing plate 33, the contact part between the front end of the swing plate 33 and the membrane roll is located at the edge of the membrane roll. When the membrane roll rotates, the swing plate 33 is prone to damaging the edge of the membrane roll. Although the probability of damage to the membrane can be reduced by making the swing plate 33 with a smooth and arc-shaped surface, there is still a certain risk of damage. This scheme uses the top surface of the support plate 35 to contact the bottom of the membrane roll, which can effectively prevent scratching the edge of the membrane roll. In addition, the pressure generated by the support plate 35 on the membrane roll covers the width of the membrane roll, and the pressure distribution is more even.

[0026] As a preferred structure, such as Figure 3 As shown, the top surface of the support plate 35 is provided with a V-shaped groove to increase the contact area with the film roll surface. The extension direction of the V-shaped groove is parallel to the main shaft 45.

[0027] Preferred, such as Figure 1 , Figure 2 As shown, both sides of the rectangular frame 31 are provided with pressure rods 32, swing plates 33 and counterweights 34 to ensure that the support plate 35 is pushed up smoothly and to prevent the support plate 35 from tilting. Specifically, the rectangular frame 31 is connected to the back plate 1 by screws, and the lower end of the back plate 1 is provided with clearance grooves corresponding to the position where the swing plate 33 is set.

[0028] Preferred, such as Figure 3 and Figure 6 As shown, the bottom surface of the support plate 35 has a strip groove 351 parallel to the main shaft 45, and the top surface of the front end of the swing plate 33 is provided with a push rod 331. The upper end of the push rod 331 is slidably disposed in the strip groove 351. This structure makes the swing plate 33 generate the main supporting force on the support plate 35 in a vertically upward state, so as to reduce the component force on the support plate 35 in the width direction, thereby improving the force transmission effect. Furthermore, by having the upper end of the push rod 331 contact the bottom surface of the strip groove 351, the contact area can be reduced, thereby reducing the force loss caused by resisting friction.

[0029] Preferred, such as Figure 3 As shown, the bottom of the pressure rod 32 is provided with an arc-shaped groove for pressing the main shaft 45. The radius of the arc-shaped groove is the same as the radius of the main shaft 45, and the depth of the arc-shaped groove is less than the radius. The design uses the arc-shaped groove and the semi-circular groove 311 to limit the main shaft 45 together, so as to improve the stability of the main shaft 45 when rotating. Since the depth of the arc-shaped groove is less than the radius, the pressure rod 32 and the top surface of the rectangular frame 31 can maintain a distance, thereby ensuring that the arc-shaped groove is pressed on the main shaft 45 at all times.

[0030] Preferred, such as Figure 3 , Figure 5 and Figure 6 As shown, the upper end of the counterweight 34 is rotatably connected to a screw 36. The screw 36 is located at the rear end of the swing plate 33 along the length of the swing plate 33, and the screw 36 is parallel to the long side of the rectangular frame 31. This structural design allows the counterweight 34 to always remain vertically hanging down. Furthermore, by adjusting the position of the screw 36 on the swing plate 33, the pressure on the main shaft 45 and the membrane roll can be adjusted. The closer the screw 36 is to the front end of the swing plate 33, the smaller the pressure on the main shaft 45; conversely, the greater the pressure.

[0031] Preferred, such as Figure 1 As shown, a pair of parallel pressing rollers 51 are provided on the front side of the back plate 1 below the winding assembly 2. The axes of the pressing rollers 51 are perpendicular to the back plate 1. The positive electrode membrane, the first diaphragm, the negative electrode membrane, and the second diaphragm all pass through the space between the two pressing rollers 51. A pressing spring 52 is provided on the outer side of each pressing roller 51. The pressing spring 52 is used to press the two pressing rollers 51 together. The purpose of setting the pressing rollers 51 here is to pre-press each membrane, so that each membrane is aligned as early as possible along the width direction, while shortening the suspension length of the membrane, reducing the vibration during the membrane transmission process, thereby improving the winding quality.

[0032] Preferred, further such as Figure 1 , Figure 2 As shown, the back plate 1 has a strip-shaped hole 11 in the horizontal direction, and a slider 22 is slidably arranged in the strip-shaped hole 11. The roller 21 is rotatably mounted on the slider 22. A support spring 23 is provided between the slider 22 and one end of the strip-shaped hole 11. A roller 24 parallel to the roller 21 is rotatably arranged on the front side of the back plate 1. The slider 22 is located between the roller 24 and the support spring 23. The longitudinal tangent trajectory of the roller 24 on the side facing the roller 21 passes through the middle of the two pressing rollers 51. With the above structure, the roller 24 is always pressed against the outer surface of the wound core during the winding process to ensure the tightness of the core winding. During the winding process, as the outer diameter of the core increases, the slider 22 will move towards the support spring 23, and the support spring 23 will be compressed to ensure the pressing force on the diaphragm.

[0033] The above description is merely a preferred embodiment of the present invention and is not intended to be the only or limiting of the invention. Those skilled in the art should understand that various changes or equivalent substitutions made to the present invention without departing from its scope are all within the protection scope of the present invention.

Claims

1. A metal film flexible straight capacitor core winding system, characterized in that, include: The back plate (1) is set vertically, and a winding assembly (2) is provided at the upper end of its front side. The spool (21) of the winding assembly (2) is perpendicular to the back plate (1). Four sets of feeding assemblies (3) are provided at the lower end of the back plate (1) in the horizontal direction, which are used to set the positive electrode membrane roll (41), the first diaphragm roll (42), the negative electrode membrane roll (43) and the second diaphragm roll (44) in sequence. The feeding assembly (3) includes a horizontally arranged rectangular frame (31), the length direction of which is consistent with the width direction of the back plate (1). A semi-circular groove (311) is provided in the middle of the top surface of the two long sides of the rectangular frame (31) to support the main shaft (45). A pressure rod (32) is provided above the semi-circular groove (311) and moves vertically. A bracket (321) is provided on the outer side of the rectangular frame (31) corresponding to the pressure rod (32). The lower end of the bracket (321) is rotatably connected to the swing plate (33). The axis of rotation is parallel to the long side of the rectangular frame (31). The front end of the swing plate (33) extends to the bottom of the rectangular frame (31). A counterweight (34) is provided at the rear end of the swing plate (33). The counterweight (34) is located on the outer side of the bracket (321).

2. The metal film flexible straight capacitor core winding system according to claim 1, characterized in that, The top surface of the rectangular frame (31) is provided with vertical positioning rods (312) on both sides of the semicircular groove (311), and the pressure rod (32) is provided with positioning holes (322) for connecting the positioning rods (312).

3. The metal film flexible straight capacitor core winding system according to claim 1, characterized in that, A support plate (35) is provided parallel to the bottom of the rectangular frame (31). Vertical guide rods (313) are provided on the inner walls of the two short sides of the rectangular frame (31). The two ends of the support plate (35) are slidably mounted on the two guide rods (313). The support plate (35) is located above the front end of the swing plate (33).

4. A metal film flexible straight capacitor core winding system according to claim 3, characterized in that, The rectangular frame (31) is equipped with a pressure bar (32), a swing plate (33) and a counterweight (34) on both sides.

5. A metal film flexible straight capacitor core winding system according to claim 3 or 4, characterized in that, The bottom surface of the support plate (35) is provided with a strip groove (351) parallel to the main shaft (45), and the top surface of the front end of the swing plate (33) is provided with a push rod (331), the upper end of the push rod (331) is slidably disposed in the strip groove (351).

6. The metal film flexible straight capacitor core winding system according to claim 1, characterized in that, The bottom of the pressure bar (32) is provided with an arc-shaped groove for pressing the main shaft (45). The radius of the arc-shaped groove is the same as the radius of the main shaft (45), and the depth of the arc-shaped groove is less than the radius.

7. A metal film flexible straight capacitor core winding system according to claim 1, characterized in that, The upper end of the counterweight (34) is rotatably connected to a screw (36), which is located at the rear end of the swing plate (33) along the length of the swing plate (33) and is parallel to the long side of the rectangular frame (31).

8. A metal film flexible straight capacitor core winding system according to claim 1, characterized in that, A pair of parallel pressing rollers (51) are provided on the front of the back plate (1) below the winding assembly (2). The axes of the pressing rollers (51) are perpendicular to the back plate (1). The positive electrode membrane, the first separator, the negative electrode membrane and the second separator all pass through the two pressing rollers (51). A pressing spring (52) is provided on the outside of the pressing rollers (51). The pressing spring (52) is used to press the two pressing rollers (51) together.

9. A metal film flexible straight capacitor core winding system according to claim 8, characterized in that, The back plate (1) has a strip hole (11) in the horizontal direction. A slider (22) is slidably provided in the strip hole (11). The scroll (21) is rotatably provided on the slider (22). A support spring (23) is provided between the slider (22) and one end of the strip hole (11). A roller (24) parallel to the scroll (21) is rotatably provided on the front of the back plate (1). The slider (22) is located between the roller (24) and the support spring (23). The longitudinal tangent trajectory of the roller (24) on the side facing the scroll (21) passes through the middle of the two pressure rollers (51).

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