Sampling machine for twisting internal enameled wire in compatibility test

Abstract

The invention discloses a sampling machine for twisting an internal enameled wire in a compatibility test, which comprises a base, a servo motor, a diameter measuring module, a torque motor, a linear moving mechanism and an enameled wire fixing block, and is characterized in that the servo motor is mounted at one end of the base, and the diameter measuring module is mounted in the middle of the base; the linear moving mechanism is installed at the other end of the base, the enameled wire fixing block is installed on the linear moving mechanism and located on the base, the fixing mechanism is arranged on the enameled wire fixing block, and the torque motor is connected with the linear moving mechanism. During sample preparation, the diameter of the enamelled wire is measured through the diameter measuring module, the servo motor rotates by corresponding turns according to the diameter of the enamelled wire to twist the enamelled wire, and the torque motor provides corresponding torque according to the diameter of the enamelled wire, so that the enamelled wire fixing block can provide corresponding tension to the enamelled wire in the twisting process. According to the invention, the sample preparation efficiency is improved, and the consistency of the prepared sample is high.

Description

Technical Field

[0001] The invention relates to the technical field of compatibility testing, and in particular to a sample making machine for twisting internal enameled wires in compatibility testing. Background Art

[0002] Enameled wire is a wire that wraps a conductive core wire in an insulating layer. The insulating layer has the characteristics of heat resistance, wear resistance, and insulation. It can protect the conductive core wire and ensure its various performances in high temperature and high pressure environments. Enameled wire is one of the indispensable components in equipment such as compressors, and its performance directly affects the reliability and service life of the compressor. In order to ensure that the enameled wire can provide effective insulation protection in actual operation, it is necessary to conduct compatibility testing on it according to the clauses in Appendix BB of the compressor safety standard IEC 60335-2-34:2021.

[0003] Before testing, the enameled wire needs to be folded in half and twisted according to the requirements of clause 4.4 of IEC 60851-5:2008+AMD1:2011+AMD2:2019. The length after twisting is 125±5 mm. The twisting process needs to select the corresponding number of twists and loads according to the diameter of the enameled wire, and finally complete the sample preparation. During the test, according to the requirements of clause 4.1, a test voltage is applied between the conductors of the enameled wire to test the breakdown voltage of the enameled wire.

[0004] In the industry, the enameled wire is basically twisted manually to obtain samples.

[0005] However, there are the following defects in manually twisting the enameled wire:

[0006] 1. The manual sample preparation operation steps are repetitive, and when there are many samples required, the labor intensity is high;

[0007] 2. When the number of twisted turns of the enameled wire is large, errors are likely to occur, resulting in rework;

[0008] 3. Manual sample preparation is inefficient;

[0009] 4. The consistency of artificially prepared samples is poor.

[0010] The above defects will eventually interfere with the test results. Summary of the invention

[0011] The object of the present invention is to provide a sample making machine for twisting internal enameled wires in compatibility testing, which improves sample making efficiency and produces samples with high consistency.

[0012] The purpose of the present invention is achieved through the following technical solutions:

[0013] A sample making machine for twisting internal enameled wire in compatibility testing, characterized in that it includes a base, a servo motor, a diameter measuring module, a torque motor, a linear moving mechanism and an enameled wire fixing block, the servo motor is installed at one end of the base, the rotating shaft of the servo motor extends horizontally and is provided with a hook structure for hooking the folded enameled wire, the diameter measuring module is installed in the middle of the base, the linear moving mechanism is installed at the other end of the base, the enameled wire fixing block is installed on the linear moving mechanism and is located above the base, the linear moving mechanism drives the enameled wire fixing block away from or close to the servo motor, the enameled wire fixing block is provided with a fixing mechanism for fixing the two ends of the folded enameled wire, and the torque motor is connected to the linear moving mechanism; when preparing the sample, the diameter of the enameled wire is measured by the diameter measuring module, the servo motor rotates a corresponding number of circles according to the diameter of the enameled wire to twist the enameled wire, and the torque motor provides a corresponding torque according to the diameter of the enameled wire, so that the enameled wire fixing block can provide a corresponding pulling force to the enameled wire during the twisting process.

[0014] A further technical solution of the present invention is: the fixing mechanism includes a rotating column and two baffles, the two baffles are relatively fixed on the top of the enameled wire fixing block, the rotating column is vertically rotated and arranged between the two baffles, and the sides of the rotating column corresponding to the two baffles are respectively provided with cam surfaces, and the gap between the cam surface and the baffle can be adjusted by rotating the rotating column, and the gap between the cam surface and the baffle is used to tighten the end of the enameled wire.

[0015] A further technical solution of the present invention is that a lever is connected to the rotating column, and the rotating column can be driven to rotate by shifting the lever.

[0016] A further technical solution of the present invention is: a flat groove is provided on the side of the enameled wire fixing block, the inner end of the flat groove extends into the interior of the enameled wire fixing block, the lower end of the rotating column is located at the inner end of the flat groove, the lever is located in the flat groove, one end of the lever is fixedly connected to the lower end of the rotating column, and the other end of the lever extends out of the flat groove.

[0017] A further technical solution of the present invention is: two diameter measuring modules are provided in the middle of the base, and the two diameter measuring modules are respectively used to measure the diameters of the two halves of the folded enameled wire; a triangular wire dividing block is provided in the middle of the base, and the triangular wire dividing block is located between the diameter measuring module and the servo motor, and the tip of the triangular wire dividing block faces the rotating shaft of the servo motor.

[0018] A further technical solution of the present invention is: the diameter measuring module includes a fixed plate, a movable plate, a pressure sensor, an infrared ranging module and a driving mechanism, a fixed seat is provided in the middle of the base, the fixed plate and the movable plate are relatively installed on the fixed seat, the movable plate can move relative to the fixed plate, the driving mechanism is used to drive the movable plate to move linearly, the pressure sensor and the infrared ranging module are respectively arranged on the fixed plate, the pressure sensor is used to measure the pressure exerted on the fixed plate, and the infrared ranging module is used to measure the distance between the fixed plate and the movable plate.

[0019] A further technical solution of the present invention is: the linear moving mechanism includes a transmission wheel group and a transmission belt, the transmission wheel group is arranged in the base, the transmission belt is installed on the transmission wheel group and exposed on the top of the base, the bottom of the enameled wire fixing block is fixedly connected to the transmission belt, and the output shaft of the torque motor is connected to the transmission wheel group.

[0020] A further technical solution of the present invention is: a motor mounting seat is provided on the base, the servo motor is installed in the motor mounting seat, and a display for displaying the number of rotations of the servo motor and the diameter measured by the diameter measuring module is provided on the motor mounting seat.

[0021] A further technical solution of the present invention is that a motor start button, a motor stop button and a motor reset button for controlling the servo motor are provided on the side of the motor mounting seat.

[0022] A further technical solution of the present invention is that the hooking structure includes a groove arranged on the side wall of the rotating shaft of the servo motor.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] When preparing samples, the present invention hooks the folded enameled wire on the rotating shaft of the servo motor, and the two ends of the folded enameled wire are fixed on the enameled wire fixing block to complete the installation of the enameled wire. Then, the diameter of the enameled wire is measured by the diameter measuring module, and the servo motor rotates the corresponding number of circles according to the diameter of the enameled wire to twist the enameled wire. The torque motor provides the corresponding torque according to the diameter of the enameled wire, so that the enameled wire fixing block can provide the corresponding pulling force to the twisted enameled wire, and finally the twisting is completed. It can be seen that the present invention can realize the automatic twisting sample preparation of the enameled wire, and the prepared samples can better meet the requirements of the standard, and the prepared samples have high consistency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a sample making machine according to an embodiment of the present invention;

[0026] Figure 2 is a schematic top view of a diameter measurement module according to an embodiment of the present invention;

[0027] Figure 3It is a schematic diagram of the assembly structure of the linear moving mechanism and the enameled wire fixing block of an embodiment of the present invention;

[0028] Figure 4 is an operation schematic diagram of a fixing mechanism according to an embodiment of the present invention;

[0029] Figure 5 is a schematic structural diagram of a servo motor according to an embodiment of the present invention when the rotating shaft hooks the folded enameled wire;

[0030] Figure 6 It is a structural schematic diagram of the sample making machine of an embodiment of the present invention when twisting the enameled wire.

[0031] Meaning of reference numerals in the figure:

[0032] 1-base; 1.1-mounting groove; 2-motor mounting seat; 3-display; 4-servo motor; 4.1-rotating shaft of servo motor; 4.2-groove; 5-triangular branching block; 6-diameter measuring module; 6.1-fixed plate; 6.2-movable plate; 7-fixed seat; 8-rotating column; 8.1-cam surface; 9-baffle; 10-enameled wire fixing block; 10.1-flat groove; 11-linear moving mechanism; 11.1-transmission wheel; 11.2-transmission belt; 12-push rod; 13-motor start button; 14-motor stop button; 15-motor reset button; 16-torque motor; 17-enameled wire; 17.1-circle; 17.2-end of enameled wire. DETAILED DESCRIPTION

[0033] The present invention is further described below in conjunction with embodiments.

[0034] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0036] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0037] Example:

[0038] like Figures 1 to 5 The prototype machine for twisting the internal enameled wire in the compatibility test according to the present embodiment is shown, which includes a base 1, a servo motor 4, a diameter measuring module 6, a torque motor 16, a linear moving mechanism 11 and an enameled wire fixing block 10.

[0039] A motor mounting seat 2 is provided on one end of the base 1, and a servo motor 4 is installed in the motor mounting seat 2. A rotating shaft 4.1 of the servo motor extends laterally from the side of the motor mounting seat 2 facing the other end of the base 1. A hook structure for hooking the folded enameled wire 17 is provided on the rotating shaft 4.1 of the servo motor. Figure 5 As shown, the hooking structure includes a groove 4.2 provided on the side wall of the rotating shaft 4.1 of the servo motor.

[0040] like Figure 2 As shown, one end of the folded enameled wire 17 will form a circle 17.1, and the other end is the end 17.2 of the enameled wire. When preparing the sample, the circle 17.1 at one end of the folded enameled wire 17 will be placed on the groove 4.2.

[0041] In this embodiment, a display 3 for displaying the number of rotations of the servo motor 4 and the diameter measured by the diameter measuring module 6 is provided on the top of the motor mounting base 2, and a motor start button 13, a motor stop button 14 and a motor reset button 15 for controlling the servo motor are provided on the side of the motor mounting base 2. The motor start button 13, the motor stop button 14 and the motor reset button 15 are used to control the servo motor 4 during manual operation.

[0042] A fixing seat 7 is provided in the middle of the base 1. In this embodiment, two diameter measuring modules 6 are arranged side by side on the fixing seat 7. The two diameter measuring modules 6 are respectively used to measure the diameters of the two halves of the folded enameled wire 17. When preparing samples, the average value measured by the two diameter measuring modules 6 is used as the final enameled wire diameter.

[0043] A triangular wire dividing block 5 is also provided on the fixing seat 7. The triangular wire dividing block 5 is located on the side of the fixing seat 7 close to the servo motor 4, that is, between the diameter measuring module 6 and the servo motor 4. The tip of the triangular wire dividing block 5 faces the rotating shaft 4.1 of the servo motor. Two diameter measuring modules 6 are respectively located on both sides of the rear of the triangular wire dividing block 5. When preparing the sample, the two halves of the folded enameled wire 17 will be located on both sides of the triangular wire dividing block 5, and the two halves of the enameled wire 17 will be bifurcated by the triangular wire dividing block 5.

[0044] like Figure 2 As shown, the diameter measuring module 6 of this embodiment includes a fixed plate 6.1, a movable plate 6.2, a pressure sensor, an infrared ranging module and a driving mechanism. The fixed plate 6.1 and the movable plate 6.2 are relatively mounted on a fixed seat, and the movable plate 6.2 can move relative to the fixed plate 6.1, that is, it can move away from or close to the fixed plate 6.1. The movable plate 6.2 can be installed movably through a conventional slide groove and a slide rail structure. The driving mechanism is connected to the movable plate 6.2 and is used to drive the movable plate 6.2 to move linearly. The driving mechanism adopts a conventional mechanism for driving an object to move linearly, such as a screw nut mechanism. The pressure sensor and the infrared ranging module are respectively arranged on the fixed plate 6.1, the pressure sensor is used to measure the pressure on the fixed plate 6.1, and the infrared ranging module is used to measure the distance between the fixed plate 6.1 and the movable plate 6.2.

[0045] The linear motion mechanism is installed at the other end of the base, such as Figure 3 As shown, the linear moving mechanism includes a transmission wheel group and a transmission belt 11.2. The transmission wheel group includes two transmission wheels 11.1. The two transmission wheels 11.1 are rotatably installed and are respectively located at the two ends of the moving path of the enameled wire fixing block 10. The transmission belt 11.2 is installed on the transmission wheel 11.1. The base 1 is provided with a mounting groove 1.1 on the top, and the transmission belt 11.2 is exposed above the mounting groove 1.1 on the base 1. The enameled wire fixing block 10 is located on the top of the base 1. The bottom of the enameled wire fixing block 10 is fixedly connected to the transmission belt 11.2. The transmission belt 11.2 can drive the enameled wire fixing block 10 to move together, so that the enameled wire fixing block 10 can be away from or close to the rotating shaft 4.1 of the servo motor. The output shaft of the torque motor 16 is connected to the transmission wheel 11.1, and the transmission wheel 11.1 is driven by the torque motor 16. During sample preparation, the torque motor 16 provides a corresponding torque according to the diameter of the enameled wire 17 , so that the enameled wire fixing block 10 can provide a corresponding pulling force to the enameled wire 17 during the twisting process.

[0046] The enameled wire fixing block 10 is provided with a fixing mechanism for fixing the end 17.2 of the enameled wire after being folded in half. The fixing mechanism of this embodiment includes a rotating column 8 and two baffles 9. The two baffles 9 are relatively fixed on the enameled wire fixing block 10. The rotating column 8 is vertically rotated and arranged between the two baffles 9. The sides of the rotating column 8 corresponding to the two baffles 9 are respectively provided with cam surfaces 8.1. By rotating the rotating column 8, the gap between the cam surface 8.1 and the baffle 9 can be adjusted. The two ends 17.2 of the enameled wire 17 after being folded in half are placed between the rotating column 8 and the baffle 9, and then the end 17.2 of the enameled wire can be fixed between the cam surface 8 and the baffle 9 by rotating the rotating column 8.

[0047] A flat groove 10.1 is provided on the side of the enameled wire fixing block 10, and the inner end of the flat groove 10.1 extends to the inside of the enameled wire fixing block 10. The lower end of the rotating column 8 is located at the inner end of the flat groove 10.1. A lever 12 is provided in the flat groove 10.1, and one end of the lever 12 is fixedly connected to the lower end of the rotating column 8, and the other end of the lever 12 extends out of the flat groove 10.1. By moving the lever 12, the rotating column 8 can be driven to rotate, and the operation is convenient and quick, so that the end 17.2 of the enameled wire can be quickly fixed. Figure 4 The figure on the left side of the middle shows a schematic diagram of the lever 12 being moved to drive the rotating column 8 to rotate, so that the gap between the cam surface 8.1 and the baffle 9 becomes smaller. Figure 4 The figure on the right side in the middle is a schematic diagram showing that the lever 12 is moved to drive the rotating column 8 to rotate, so that the gap between the cam surface 8.1 and the baffle 9 becomes larger.

[0048] The use process of the prototype machine for twisting the internal enameled wire in this embodiment is as follows:

[0049] When preparing samples, Figure 6 As shown, the enameled wire 17 is folded in half, and the circle 17.1 formed at one end of the folded enameled wire 17 is sleeved on the groove 4.2 on the rotating shaft 4.1 of the servo motor. The folded enameled wire 17 passes through the two sides of the triangular dividing block 5 respectively, and passes between the fixed plate 6.1 and the movable plate 6.2 of the diameter measuring module 6, and the end 17.2 of the enameled wire is placed between the rotating column 8 and the baffle 9, and then the lever 12 is moved to rotate the rotating column 8 and clamp the end 17.2 of the enameled wire at the same time, thereby completing the fixation of the enameled wire 17.

[0050] Then the sample making machine is started, and the driving mechanism of the diameter measuring module 6 drives the movable plate 6.2 to move toward the fixed plate 6.1 until the pressure sensor measures the set pressure and stops moving. At this time, the infrared distance measuring module measures the distance between the fixed plate 6.1 and the movable plate 6.2, and the diameters of the two halves of the folded enameled wire 17 are obtained. The average of the diameters measured by the two diameter measuring modules is used as the final diameter of the enameled wire. After the measurement is completed, the movable plate automatically resets.

[0051] Then the controller of the sample making machine obtains the corresponding number of twisting turns and load according to the diameter of the enameled wire (the controller of the sample making machine will store the corresponding data between the diameter of the enameled wire, the number of twisting turns and the load, and the corresponding number of twisting turns and the load can be directly found according to the diameter of the enameled wire, and the load is the tension of the enameled wire fixing block 10 on the enameled wire 17), and then starts the servo motor 4 and the torque motor 16, and the servo motor 4 rotates the corresponding number of turns according to the diameter of the enameled wire 17 to twist the enameled wire 17, and the torque motor 16 provides the corresponding torque according to the diameter of the enameled wire, so that the enameled wire fixing block 10 can provide the corresponding tension to the twisted enameled wire 17, and finally complete the twisting. After the twisting is completed, the lever 12 is toggled to make the rotating column loosen the two ends of the folded enameled wire 17, and then the enameled wire that has been twisted can be taken out.

[0052] The above embodiments of the present invention are not intended to limit the protection scope of the present invention, and the implementation modes of the present invention are not limited thereto. All other modifications, replacements or changes made to the above structures of the present invention based on the above contents of the present invention, in accordance with common technical knowledge and customary means in the art, without departing from the above basic technical ideas of the present invention, should fall within the protection scope of the present invention.

Claims

1. A prototype machine for twisting internal enameled wires in compatibility testing, characterized in that: The invention comprises a base, a servo motor, a diameter measuring module, a torque motor, a linear moving mechanism and an enameled wire fixing block, wherein the servo motor is installed at one end of the base, the rotating shaft of the servo motor extends horizontally and is provided with a hook structure for hooking the folded enameled wire, the diameter measuring module is installed in the middle of the base, the linear moving mechanism is installed at the other end of the base, the enameled wire fixing block is installed on the linear moving mechanism and is located above the base, the linear moving mechanism drives the enameled wire fixing block away from or close to the servo motor, the enameled wire fixing block is provided with a fixing mechanism for fixing the two ends of the folded enameled wire, and the torque motor is connected to the linear moving mechanism; when preparing the sample, the diameter of the enameled wire is measured by the diameter measuring module, the servo motor rotates a corresponding number of circles according to the diameter of the enameled wire to twist the enameled wire, and the torque motor provides a corresponding torque according to the diameter of the enameled wire, so that the enameled wire fixing block can provide a corresponding pulling force to the enameled wire during the twisting process.

2. The prototype machine for twisting internal enameled wires in compatibility testing according to claim 1, characterized in that: The fixing mechanism includes a rotating column and two baffles, the two baffles are relatively fixed on the top of the enameled wire fixing block, the rotating column is vertically rotated and arranged between the two baffles, and the side surfaces of the rotating column corresponding to the two baffles are respectively provided with cam surfaces, and the gap between the cam surface and the baffle can be adjusted by rotating the rotating column, and the gap between the cam surface and the baffle is used to tighten the end of the enameled wire.

3. The prototype machine for twisting internal enameled wires in compatibility testing according to claim 2, characterized in that: The rotating column is connected with a lever, and the rotating column can be driven to rotate by shifting the lever.

4. The prototype machine for twisting internal enameled wires in compatibility testing according to claim 3, characterized in that: A flat groove is provided on the side of the enameled wire fixing block, the inner end of the flat groove extends into the interior of the enameled wire fixing block, the lower end of the rotating column is located at the inner end of the flat groove, the shift rod is located in the flat groove, one end of the shift rod is fixedly connected to the lower end of the rotating column, and the other end of the shift rod extends out of the flat groove.

5. The prototype machine for twisting internal enameled wires in compatibility testing according to claim 1, characterized in that: Two diameter measuring modules are provided in the middle of the base, and the two diameter measuring modules are respectively used to measure the diameters of the two halves of the folded enameled wire. A triangular wire dividing block is provided in the middle of the base, and the triangular wire dividing block is located between the diameter measuring module and the servo motor, and the tip of the triangular wire dividing block faces the rotating shaft of the servo motor.

6. The prototype machine for twisting internal enameled wires in compatibility testing according to claim 1, characterized in that: The diameter measuring module includes a fixed plate, a movable plate, a pressure sensor, an infrared ranging module and a driving mechanism. A fixed seat is provided in the middle of the base. The fixed plate and the movable plate are installed on the fixed seat relative to each other. The movable plate can move relative to the fixed plate. The driving mechanism is used to drive the movable plate to move linearly. The pressure sensor and the infrared ranging module are respectively arranged on the fixed plate. The pressure sensor is used to measure the pressure exerted on the fixed plate. The infrared ranging module is used to measure the distance between the fixed plate and the movable plate.

7. The prototype machine for twisting internal enameled wires in compatibility testing according to claim 1, characterized in that: The linear motion mechanism includes a transmission wheel group and a transmission belt. The transmission wheel group is arranged in the base. The transmission belt is installed on the transmission wheel group and exposed on the top of the base. The bottom of the enameled wire fixing block is fixedly connected to the transmission belt, and the output shaft of the torque motor is connected to the transmission wheel group.

8. The prototype machine for twisting internal enameled wires in compatibility testing according to claim 1, characterized in that: A motor mounting seat is provided on the base, the servo motor is installed in the motor mounting seat, and a display for displaying the number of rotations of the servo motor and the diameter measured by the diameter measuring module is provided on the motor mounting seat.

9. The prototype machine for twisting internal enameled wires in compatibility testing according to claim 8, characterized in that: A motor start button, a motor stop button and a motor reset button for controlling the servo motor are arranged on the side of the motor mounting seat.

10. The prototype machine for twisting internal enameled wires in compatibility testing according to claim 1, characterized in that: The hooking structure includes a groove provided on a side wall of the rotating shaft of the servo motor.

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