Film binding machine

Abstract

The utility model relates to the field of electromagnetic relay winding production equipment, in particular to a film binding machine which comprises a workbench, a guide wheel frame, a rotary ring and a plurality of guide wheels. The rotary ring is of a circular ring structure, the guide wheels are evenly distributed on the periphery of the rotary ring, and the guide wheels make contact with the rotary ring; the guide wheel frame is vertically mounted on the workbench; a central through hole is formed in the guide wheel frame; the guide wheels are mounted on the guide wheel frames through rotating shafts; a thin film rolling wheel is mounted on the rotary ring; a thin film is wound on the thin film winding wheel; a guide rail is mounted on the workbench, a sliding seat is mounted on the guide rail in a sliding manner, and a coil mounting shaft is mounted on the sliding seat; the guide rail is parallel to the axis of the rotary ring, and the axis of the coil mounting shaft coincides with the axis of the rotary ring. When the thin film is wound on the coil workpiece, the sliding seat can be pushed to slide on the sliding rail, so that the coil workpiece is driven to move in the axial direction, and the coil workpiece can be wound by the thin film in the axial direction.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic relay winding production equipment, and in particular to a film wrapping machine. Background Technology

[0002] A relay is an electrical device that connects or disconnects a circuit based on changes in physical quantities such as voltage, current, temperature, speed, or time. The main functions of a relay are protection and control; therefore, although there are many types of relays, they can generally be divided into two main categories: protective relays and control relays. Common types of relays include thermal relays, electromagnetic relays, time relays, temperature relays, and speed relays.

[0003] Electromagnetic relays utilize the magnetic field generated by current flowing through a coil (winding wire) to attract an armature, thereby opening or closing the contacts. During the manufacturing process, after the coil is wound and the connectors are soldered, the wire ends are first wrapped and secured with PTFE film. Then, a layer of polyimide film is wrapped around the coil to prevent the wire ends from piercing the enamel layer. Finally, PTFE film is wrapped and secured again.

[0004] Traditional film winding methods rely on manual winding, which is inefficient. With advancements in film winding equipment technology, several film winding machines have emerged. For example, patent CN221542186U discloses a winding machine with film breakage detection, and patent CN221835598U discloses a dual-motor adjustable stretch ratio film carriage horizontal winding machine. In these existing winding machines, a rotating frame is driven to rotate, causing the film roll on the frame to rotate along with it for winding the product.

[0005] However, in the aforementioned winding machines, the workpieces being wound cannot move during the winding process. For the coil in an electromagnetic relay, the coil needs to move axially during winding to ensure that the coil can be wound with the film in the axial direction. Therefore, the winding machines in the prior art cannot meet the requirements for winding coils. Utility Model Content

[0006] The main purpose of this invention is to provide a film wrapping machine to solve the above-mentioned technical problems.

[0007] To achieve the above objectives, this utility model proposes a film wrapping machine, including a worktable, a guide wheel frame, a rotating ring, and multiple guide wheels; the rotating ring has a circular structure, and multiple guide wheels are evenly distributed around the periphery of the rotating ring, with the guide wheels in contact with the rotating ring; the guide wheel frame is vertically mounted on the worktable; the guide wheel frame has a central through hole; the guide wheels are mounted on the guide wheel frame via rotating shafts; and the guide wheels are evenly distributed in a ring around the central through hole of the guide wheel frame; a film winding wheel is mounted on the rotating ring; a film is wound on the film winding wheel; a guide rail is mounted on the worktable, a slide block is slidably mounted on the guide rail, and a coil mounting shaft is mounted on the slide block; the guide rail is parallel to the axis of the rotating ring, and the axis of the coil mounting shaft coincides with the axis of the rotating ring.

[0008] Preferably, a protective cover is provided on the guide wheel frame, and the rotating ring, guide wheel and film winding wheel are all located inside the protective cover.

[0009] Preferably, a rectangular hole is provided on the workbench, the guide wheel frame is vertically inserted into the rectangular hole, and one of the long sides of the rectangular hole is welded.

[0010] Preferably, an annular groove is provided on the outer circumferential surface of the rotating ring, and the cross-section of the annular groove is V-shaped; the outer circumferential surface of the guide wheel is adapted to the annular groove, and the outer circumference of the guide wheel is embedded in the annular groove.

[0011] Preferably, a support plate is mounted on the guide wheel frame, and a drive motor is mounted on the support plate; the output shaft of the drive motor is connected to the rotating shaft of one of the guide wheels.

[0012] Preferably, on the shafts of three adjacent guide wheels on the guide wheel frame, one shaft is equipped with a driving wheel, and the other two shafts are equipped with driven wheels; the shaft with the driving wheel is connected to the output shaft of the drive motor; and a transmission belt is fitted on both the driving wheel and the driven wheel.

[0013] Preferably, the number of guide wheels is six.

[0014] Preferably, there are two film winding wheels, which are symmetrically distributed at 180 degrees on the rotating ring; a polytetrafluoroethylene film is wound on one of the film winding wheels; and a polyimide film is wound on the other film winding wheel.

[0015] Preferably, the workbench has support legs at the four corners of its bottom surface.

[0016] Preferably, a plug-in seat is provided on the top of the slide block, and a horizontal through hole is provided on the plug-in seat; the coil mounting shaft is a stepped shaft, which includes a first shaft segment, a second shaft segment, a third shaft segment, a fourth shaft segment, a fifth shaft segment, and a sixth shaft segment from left to right; the first shaft segment is inserted into the horizontal through hole and is interference-fitted; the outer diameter of the second shaft segment is larger than the outer diameter of the first shaft segment; the outer diameters of the third shaft segment, the fourth shaft segment, the fifth shaft segment, and the sixth shaft segment gradually decrease; the sixth shaft segment is provided with an external thread and a clamping nut is screwed on.

[0017] Due to the adoption of the above technical solution, the beneficial effects of this utility model are as follows:

[0018] By employing the film wrapping machine provided by this utility model, during use, the coil workpiece to be wrapped with film is sleeved on the right end of the coil mounting shaft. When the rotary ring rotates, it drives the film winding wheel to rotate around the coil workpiece, thereby wrapping the film around the coil workpiece. Since a guide rail is installed on the worktable, and a slide block is slidably installed on the guide rail, and the coil mounting shaft is installed on the slide block, the slide block can be pushed to slide on the guide rail while the film is being wrapped around the coil workpiece, thereby driving the coil workpiece to move along its axial direction, thus allowing the coil workpiece to be wrapped with film in the axial direction. Attached Figure Description

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0020] Figure 1 This is a front sectional view of the film wrapping machine provided by this utility model;

[0021] Figure 2 This is a right view of the film wrapping machine provided by this utility model.

[0022] Explanation of reference numerals: 1. Worktable; 1a. Rectangular hole; 2. Guide wheel frame; 2a. Central through hole; 3. Guide wheel; 4. Rotary ring; 4a. Annular groove; 5. Rotating shaft; 6. Thin film winding wheel; 7. Guide rail; 8. Slide; 8a. Plug-in socket; 8b. Horizontal through hole; 9. Coil mounting shaft; 9a. First shaft section; 9b. Second shaft section; 9c. Third shaft section; 9d. Fourth shaft section; 9e. Fifth shaft section; 9f. Sixth shaft section; 10. Protective cover; 11. Support plate; 12. Drive motor; 13. Driving wheel; 14. Driven wheel; 15. Transmission belt; 16. Support leg. Detailed Implementation

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0025] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0026] Combination Figure 1 , Figure 2 As shown, a film wrapping machine includes a worktable 1, a guide wheel frame 2, a rotating ring 4, and multiple guide wheels 3. The rotating ring 4 has a circular structure, and the multiple guide wheels 3 are evenly distributed around the periphery of the rotating ring 4, with the guide wheels 3 in contact with the rotating ring 4. The guide wheel frame 2 is vertically mounted on the worktable 1. The guide wheel frame 2 has a central through hole 2a. The guide wheels 3 are mounted on the guide wheel frame 2 via a rotating shaft 5, and the guide wheels 3 are evenly distributed in a ring around the central through hole 2a of the guide wheel frame 2. A film winding wheel 6 is mounted on the rotating ring 4, and a film is wound on the film winding wheel 6. A guide rail 7 is mounted on the worktable 1, and a slide block 8 is slidably mounted on the guide rail 7. A coil mounting shaft 9 is mounted on the slide block 8. The guide rail 7 is parallel to the axis of the rotating ring 4, and the axis of the coil mounting shaft 9 coincides with the axis of the rotating ring 4.

[0027] By adopting the above structure, during use, the coil workpiece to be wound with film is sleeved on the coil mounting shaft 9. When the rotating ring 4 rotates, it can drive the film winding wheel 6 to rotate around the coil workpiece, thereby winding the film around the coil workpiece. Since the worktable 1 is equipped with a guide rail 7, and a slide block 8 is slidably mounted on the guide rail 7, and the coil mounting shaft 9 is mounted on the slide block 8, the slide block 8 can be pushed to slide on the guide rail 7 while the coil workpiece is being wound with film, thereby driving the coil workpiece to move along its axial direction, thus allowing the coil workpiece to be wound with film in the axial direction.

[0028] Combination Figure 1 As shown, a protective cover 10 is provided on the guide wheel frame 2, and the rotating ring 4, the guide wheel 3 and the film winding wheel 6 are all located inside the protective cover 10.

[0029] Combination Figure 1 As shown, a rectangular hole 1a is provided on the worktable 1, and the guide wheel frame 2 is vertically inserted into the rectangular hole 1a, with one long side of the rectangular hole 1a welded. By adopting the above structure, the height of the central through hole 2a of the guide wheel frame 2 relative to the worktable 1 is reduced, which is beneficial to reducing the height of the axis of the rotary ring 4 relative to the worktable 1. Therefore, the height of the axis of the coil mounting shaft 9 relative to the worktable 1 does not need to be too high to meet the requirement that the axis of the coil mounting shaft 9 coincides with the axis of the rotary ring 4.

[0030] Combination Figure 1 As shown, an annular groove 4a is provided on the outer circumferential surface of the rotating ring 4, and the cross-section of the annular groove 4a is V-shaped. The outer circumferential surface of the guide wheel 3 is adapted to the annular groove 4a, and the outer circumference of the guide wheel 3 is embedded in the annular groove 4a. By utilizing the cooperation between the annular groove 4a and the guide wheel 3, the rotating ring 4 is axially limited.

[0031] Combination Figure 1 As shown, a support plate 11 is mounted on the guide wheel frame 2, and a drive motor 12 is mounted on the support plate 11; the output shaft of the drive motor 12 is connected to the rotating shaft 5 of one of the guide wheels 3. By using the output shaft of the drive motor 12 to drive the rotating shaft 5 to rotate, the guide wheel 3 connected to the rotating shaft 5 will rotate. There is contact friction between the guide wheel 3 and the rotating ring 4, so the guide wheel 3 drives the rotating ring 4 to rotate.

[0032] Combination Figure 1 , Figure 2As shown, on the rotating shafts 5 of three adjacent guide wheels 3 on the guide wheel frame 2, one shaft 5 is equipped with a driving wheel 13, and the other two shafts 5 are equipped with driven wheels 14. The shaft 5 with the driving wheel 13 is connected to the output shaft of the drive motor 12. A transmission belt 15 is fitted on both the driving wheel 13 and the driven wheel 14. By adopting the above structure, while the driven wheel 14 rotates, the transmission belt 15 drives the two driven wheels 14 to rotate, thereby driving the corresponding guide wheel 3 to rotate, and better driving the rotary ring 4 to rotate.

[0033] Combination Figure 2 As shown, there are six guide wheels 3. Support legs 16 are located at the four corners of the bottom surface of the worktable 1.

[0034] In this embodiment, there are two film rolls 6, which are symmetrically distributed at 180 degrees on the rotating ring 4; a polytetrafluoroethylene film is wound on one of the film rolls 6; and a polyimide film is wound on the other film roll 6.

[0035] Combination Figure 1 As shown, a plug-in seat 8a is provided on the top of the slide 8, and a horizontal through hole 8b is provided on the plug-in seat 8a; the coil mounting shaft 9 is a stepped shaft, which includes a first shaft segment 9a, a second shaft segment 9b, a third shaft segment 9c, a fourth shaft segment 9d, a fifth shaft segment 9e, and a sixth shaft segment 9f from left to right; the first shaft segment 9a is inserted into the horizontal through hole 8b and is interference-fitted; the outer diameter of the second shaft segment 9b is larger than the outer diameter of the first shaft segment 9a; the outer diameters of the third shaft segment 9c, the fourth shaft segment 9d, the fifth shaft segment 9e, and the sixth shaft segment 9f gradually decrease; the sixth shaft segment 9f is provided with an external thread and a clamping nut is screwed on.

[0036] The working principle of the film wrapping machine provided in this embodiment includes the following steps:

[0037] S1. Place the coil workpiece with the wound film on the fifth shaft section 9e of the coil mounting shaft 9, and tighten the coil workpiece by screwing on the sixth shaft section 9f, so that the left end of the coil workpiece abuts against the right end face of the fourth shaft section 9d, thus completing the installation of the coil workpiece.

[0038] S2. After the operator winds the film on the film reel 6, which is wrapped with polytetrafluoroethylene film, around the coil workpiece twice, the operator starts the drive motor 12 to make the rotating ring 4 rotate. After the polytetrafluoroethylene film is wound around the coil workpiece, the polytetrafluoroethylene film is cut.

[0039] S3. After inserting the film on the film reel 6 with the polyimide film wound on it into the joint between the polytetrafluoroethylene film and the coil, start the drive motor 12 to make the rotating ring 4 rotate, and after winding the polyimide film around the coil workpiece, cut the polyimide film.

[0040] S4. Repeat step S2 to wind the polytetrafluoroethylene film again.

[0041] In steps S2, S3 and S4, during winding, the slide block 8 is pushed to slide on the slide rail 7, thereby driving the coil workpiece to move along its axial direction, so that the coil workpiece can be wound with the film in the axial direction.

[0042] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the concept of the present utility model and using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. A film wrapping machine, characterized in that, It includes a worktable (1), a guide wheel frame (2), a rotary ring (4), and multiple guide wheels (3); The rotating ring (4) has a circular structure, and multiple guide wheels (3) are evenly distributed around the outer periphery of the rotating ring (4), with the guide wheels (3) in contact with the rotating ring (4). The guide wheel frame (2) is vertically mounted on the workbench (1); the guide wheel frame (2) is provided with a central through hole (2a); the guide wheel (3) is mounted on the guide wheel frame (2) through a rotating shaft (5); and the guide wheels (3) are evenly distributed in a ring around the central through hole (2a) of the guide wheel frame (2); A film reel (6) is mounted on the rotating ring (4); a film is wound on the film reel (6); A guide rail (7) is installed on the worktable (1), a slide block (8) is slidably installed on the guide rail (7), and a coil mounting shaft (9) is installed on the slide block (8); The guide rail (7) is parallel to the axis of the rotary ring (4), and the axis of the coil mounting shaft (9) coincides with the axis of the rotary ring (4).

2. The film wrapping machine as described in claim 1, characterized in that, A protective cover (10) is provided on the guide wheel frame (2), and the rotating ring (4), guide wheel (3) and film roll (6) are all located inside the protective cover (10).

3. A film wrapping machine as described in claim 1, characterized in that, A rectangular hole (1a) is provided on the workbench (1), and the guide wheel frame (2) is vertically inserted into the rectangular hole (1a), and one of the long sides of the rectangular hole (1a) is welded.

4. A film wrapping machine as described in claim 1, characterized in that, An annular groove (4a) is provided on the outer circumferential surface of the rotating ring (4), and the cross-section of the annular groove (4a) is V-shaped; the outer circumferential surface of the guide wheel (3) is adapted to the annular groove (4a), and the outer circumference of the guide wheel (3) is embedded in the annular groove (4a).

5. A film wrapping machine as described in claim 1, characterized in that, A support plate (11) is mounted on the guide wheel frame (2), and a drive motor (12) is mounted on the support plate (11); the output shaft of the drive motor (12) is connected to the rotating shaft (5) of one of the guide wheels (3).

6. A film wrapping machine as described in claim 5, characterized in that, On the rotating shafts (5) of the three adjacent guide wheels (3) on the guide wheel frame (2), one of the rotating shafts (5) is equipped with a driving wheel (13), and the other two rotating shafts (5) are equipped with driven wheels (14); the rotating shaft (5) equipped with the driving wheel (13) is connected to the output shaft of the drive motor (12); the driving wheel (13) and the driven wheel (14) are both fitted with a transmission belt (15).

7. A film wrapping machine as described in claim 1, characterized in that, The number of guide wheels (3) is six.

8. A film wrapping machine as described in claim 1, characterized in that, There are two film rolls (6), which are symmetrically distributed at 180 degrees on the rotating ring (4); a polytetrafluoroethylene film is wound on one of the film rolls (6); and a polyimide film is wound on the other film roll (6).

9. A film wrapping machine as described in claim 1, characterized in that, The workbench (1) has legs (16) at the four corners of its bottom surface.

10. A film wrapping machine as described in claim 1, characterized in that, A plug-in seat (8a) is provided on the top of the slide (8), and a horizontal through hole (8b) is provided on the plug-in seat (8a); the coil mounting shaft (9) is a stepped shaft, which includes a first shaft section (9a), a second shaft section (9b), a third shaft section (9c), a fourth shaft section (9d), a fifth shaft section (9e), and a sixth shaft section (9f) from left to right; the first shaft section (9a) is inserted into the horizontal through hole (8b) and is interference-fitted; the outer diameter of the second shaft section (9b) is larger than the outer diameter of the first shaft section (9a); the outer diameters of the third shaft section (9c), the fourth shaft section (9d), the fifth shaft section (9e), and the sixth shaft section (9f) gradually decrease; the sixth shaft section (9f) is provided with an external thread and a clamping nut is screwed on.

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