Device for testing magnetic force of electromagnet of sewing machine

Abstract

The utility model discloses a sewing machine electromagnet magnetic force testing device, an electromagnet comprises a shell, a coil and a guide rod, the coil is sleeved on the guide rod, the guide rod is in sliding fit with the shell, and the coil can drive the guide rod to move axially after being electrified; comprising a workbench, a motor, a lead screw, a sliding block, a pressure sensor and a base. When the electromagnet magnetic force is tested, the motor can drive the sliding block to move through the lead screw, the distance between the sliding block and the electromagnet is determined, the guide rod can collide with the pressure sensor after the electromagnet is powered on, and the electromagnet magnetic force is fed back through the pressure sensor. By means of the arrangement, the standards for testing electromagnets of different models and specifications are more identical, and the testing stability and the testing efficiency can be greatly improved; and the testing mode of firstly fixing the spacing and then electrifying reduces the interference of other factors on the testing process, thereby greatly improving the testing accuracy.

Description

Technical Field

[0001] The utility model relates to the field of magnetic force testing equipment, in particular to a magnetic force testing device for an electromagnet of a sewing machine. Background Art

[0002] At present, similar testing methods for the magnetic force of sewing machine electromagnets all adopt manual adjustment and use calipers to confirm the distance between the pressure sensor and the electromagnet. This leads to slow efficiency of magnetic force testing and can only meet the testing of electromagnets of fixed patterns and sizes, and there is no result judgment.

[0003] The prior art with publication number CN218973696U discloses a magnetic steel magnetic force-distance testing device, including a manual feeding device, a screw rod, a guide rail assembly, a lifting assembly, a tension pressure sensor, a cylindrical magnetic steel, an annular magnetic steel, a laser displacement sensor and a scale, and a guide rail assembly is provided on the right side of the manual feeding device, the guide rail assembly includes a slide rail, the upper part of the slide rail is slidably connected to the slider, and a screw rod is provided in the slide rail, the left end of the screw rod is connected to the rotating shaft in the manual feeding device through an end gear, and the screw rod is connected to two groups of sliders, the upper surfaces of the two groups of sliders are connected to the lifting assembly through bolts, the lifting assembly on the left side is connected to the cylindrical magnetic steel through the tension pressure sensor, the lifting assembly on the right side is connected to the annular magnetic steel, and a laser displacement sensor is provided on the right side of the guide rail assembly, and the axes of the cylindrical magnetic steel and the annular magnetic steel are located on the same straight line.

[0004] In the prior art, the pressure sensor and the magnetic steel position need to be manually adjusted during the magnetic force testing process. Such a testing process is lengthy, and the manual adjustment precision is low, resulting in poor accuracy of the results. Utility Model Content

[0005] In order to solve the problems of long testing process and poor efficiency in the prior art, the purpose of the utility model is to provide a sewing machine electromagnet magnetic force testing device, the structure of the testing device is simpler, the testing process is simpler and more direct, the test result response is fast, and the testing efficiency of the sewing machine electromagnet is higher.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a sewing machine electromagnet magnetic force testing device, the electromagnet includes a shell, a coil and a guide rod, the coil is hollowly sleeved on the guide rod, the guide rod and the shell are slidably matched, and the coil can drive the guide rod to move axially after being energized; including a workbench, a motor, a screw rod, a slider, a pressure sensor and a base;

[0007] The motor and the base are both fixed on the workbench; the slider is located between the motor and the base, and the slider is slidably installed on the workbench; the pressure sensor is located between the base and the slider, and the pressure sensor is fixed on the slider; the screw rod is threadedly connected to the slider, and one end of the screw rod extends from the slider and is transmission-connected to the motor; the electromagnet is installed on the base, and the pressure sensor is coaxially arranged with the guide rod of the electromagnet;

[0008] When testing the magnetic force of the electromagnet, the motor can drive the slider to move through the screw rod to determine the distance between the slider and the electromagnet. After the electromagnet is energized, the guide rod can hit the pressure sensor, and the magnetic force of the electromagnet is fed back through the pressure sensor.

[0009] Preferably, a mounting frame and a slide rail are fixed on the workbench, the motor is mounted on the mounting frame, the slider is mounted on the slide rail, the motor shaft of the motor is connected to the screw rod through a coupling, and the motor shaft, screw rod and pressure sensor are coaxially arranged.

[0010] Preferably, the workbench is provided with a first positioning hole, a second positioning hole and a third positioning hole, the mounting frame is connected to the first positioning hole by bolts, the slide rail is connected to the second positioning hole by bolts, and the base is connected to the third positioning hole by bolts.

[0011] Preferably, it also includes a controller for controlling the movement of the motor and the power on and off of the electromagnet.

[0012] Preferably, a display screen for displaying data is further included, and the controller is electrically connected to the display screen, so that a user can observe and adjust the data through the display screen.

[0013] Preferably, it also includes an indicator light for providing feedback on whether the electromagnet is qualified, and the indicator light is electrically connected to the controller.

[0014] Preferably, it also includes a wiring switch, which is electrically connected to the electromagnet and is used to control the on and off of power to the electromagnet.

[0015] Preferably, it also includes a plurality of fences, which are fixed on the workbench, and the plurality of fences enclose a working cavity opening forward; the motor, the slider and the base are all located in the working cavity.

[0016] Preferably, a grating for blocking the opening of the working chamber is installed on the fence.

[0017] Preferably, a plurality of support columns are fixed to the bottom of the workbench.

[0018] The beneficial effects of the technical solution of the utility model are as follows: since the positions of the motor and the electromagnet are fixed, the standards for testing electromagnets of different models and specifications are more consistent, and the test stability and test efficiency can be greatly improved; the test method of first fixing the spacing and then energizing reduces the interference of other factors on the test process, thereby greatly improving the accuracy of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a sewing machine electromagnet magnetic force testing device;

[0020] Figure 2The schematic diagram of the structure of the sewing machine electromagnet magnetic force testing device after the fence is removed;

[0021] Figure 3 This is a schematic diagram of the structure of the workbench.

[0022] Figure numerals: 1. workbench; 2. motor; 3. mounting bracket; 4. coupling; 5. screw; 6. slide rail; 7. slider; 8. pressure sensor; 9. guide rod; 10. base; 11. positioning part; 12. avoidance hole; 13. electromagnet; 14. support column; 15. fence; 16. grating; 17. wiring switch; 18. display screen; 19. indicator light; 20. first positioning hole; 21. second positioning hole; 22. third positioning hole. DETAILED DESCRIPTION

[0023] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships 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.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more, unless otherwise clearly defined.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. Example

[0028] like Figure 1-3 The electromagnet magnetic force testing device for a sewing machine is shown, wherein the electromagnet 13 comprises a housing, a coil and a guide rod 9, wherein the coil is hollowly sleeved on the guide rod 9, the guide rod 9 is slidably matched with the housing, and the coil can drive the guide rod 9 to move axially after being energized; the testing device comprises a workbench 1, a motor 2, a screw rod 5, a slider 7, a pressure sensor 8 and a base 10;

[0029] The motor 2 and the base 10 are both fixed on the workbench 1; the slider 7 is located between the motor 2 and the base 10, and the slider 7 is slidably installed on the workbench 1; the pressure sensor 8 is located between the base 10 and the slider 7, and the pressure sensor 8 is fixed on the slider 7; the screw rod 5 is threadedly connected to the slider 7, one end of the screw rod 5 extends from the slider 7 and is transmission-connected to the motor 2; the electromagnet 13 is installed on the base 10, and the pressure sensor 8 is coaxially arranged with the guide rod 9 of the electromagnet 13.

[0030] When using the above-mentioned testing device, the electromagnet 13 is installed on the base 10, and then the motor 2 drives the screw rod 5 to rotate, and the screw rod 5 drives the slider 7 to move, and the distance between the pressure sensor 8 and the electromagnet 13 is adjusted. After the distance between the pressure sensor 8 and the electromagnet 13 is determined, the electromagnet 13 is energized to drive the guide rod 9 to hit the pressure sensor 8, and the pressure sensor 8 directly feeds back whether the performance of the electromagnet 13 is qualified.

[0031] With such an arrangement, since the positions of the motor 2 and the electromagnet 13 are fixed, the standards for testing electromagnets 13 of different models and specifications are more consistent, and the test stability and test efficiency can be greatly improved; the test method of first fixing the spacing and then energizing reduces the interference of other factors on the test process, thereby greatly improving the accuracy of the test.

[0032] The specific structure of the electromagnet can refer to the prior art with publication numbers TW200514885A, TWI286582B and CN203144676U.

[0033] In this embodiment, a controller for controlling the test process is also included; the pressure sensor 8, the motor 2 and the electromagnet 13 are all electrically connected to the controller. Such an arrangement can automatically control the test process, thereby improving the standardization of the test and the test efficiency.

[0034] In this embodiment, a fence 15 is also included, which is fixed on the workbench and forms a workspace on the workbench 1 that opens forward; the motor 2, the slider 7, and the base 10 for mounting the electromagnet 13 are all located in the workspace. This arrangement can ensure the safety of the test environment and reduce the interference of the external environment on the test.

[0035] In this embodiment, a grating 16 is installed on the fence 15; during the test, the grating 16 is activated to prevent workers from operating incorrectly.

[0036] In this embodiment, a mounting frame 3 and a slide rail 6 are fixed on the workbench 1, the motor 2 is mounted on the mounting frame 3, the slider 7 is mounted on the slide rail 6, the motor shaft of the motor 2 is connected to the screw rod 5 through the coupling 4, and the motor shaft, the screw rod 5 and the pressure sensor 8 are coaxially arranged. Specifically, a first positioning hole 20, a second positioning hole 21 and a third positioning hole 22 are opened on the workbench 1; the motor 2 mounting seat is fixed to the first positioning hole 20 of the workbench 1 by bolts, the motor 2 is mounted on the motor 2 mounting seat, the slide rail 6 is fixed to the second positioning hole 21 of the workbench 1 by bolts, and the base 10 is fixed to the third positioning hole 22 of the workbench 1 by bolts. In this arrangement, since the models and specifications of the sewing machine electromagnet 13 are different, different bases 10 are required to cooperate with the electromagnet 13, so when the above-mentioned test device is used to test the electromagnets 13 of different specifications, the bases 10 that do not pass can be fixed to the same place on the workbench 1, thereby simplifying the data adjustment process and simplifying the test process.

[0037] In this embodiment, a display screen 18 is also included, which is installed in the workspace and is electrically connected to the controller. The display screen 18 can display the test device data, and the controller preset value can be adjusted by touching the display screen 18. In this way, the test process can be intuitively seen.

[0038] In this embodiment, an indicator light 19 is also included for providing feedback on whether the electromagnet 13 is qualified. The indicator light 19 is electrically connected to the controller and is installed on the top of the fence 15 .

[0039] In this embodiment, a wiring switch 17 electrically connected to the controller is also included. The wiring switch 17 is used to control the on and off of the electromagnet 13. The wiring switch 17 is arranged in the working space.

[0040] In this embodiment, a positioning portion 11 protruding upward is provided on the base 10, and a positioning groove is provided on the end face of the positioning portion 11 facing the slider 7; the electromagnet 13 is engaged with the positioning groove; an avoidance hole 12 is opened on the positioning portion 11, and the wires used to connect the electromagnet 13 and the wiring switch 17 can pass through the avoidance hole 12.

[0041] In this embodiment, a plurality of support columns 14 are fixed to the bottom of the workbench 1 .

[0042] In this embodiment, the motor 2 is a PLC-controlled servo motor 2 .

[0043] In this embodiment, a start switch for controlling the start and stop of the test is fixed to the front end of the workbench, and the start switch is electrically connected to the controller.

[0044] When using the above-mentioned test device to test the in and out movement of the sewing machine electromagnet 13: select a base 10 that is compatible with the electromagnet 13 to be tested and fix it on the workbench 1, and connect the power cord of the electromagnet 13 to the wiring switch 17; operate the PLC to control the servo motor 2 through the touch screen to make the pressure sensor 8 slide on the slide rail 6, and control the travel distance between the pressure sensor 8 and the electromagnet 13 to be tested; press the start switch to automatically test the suction force of the electromagnet 13, and display the measurement results and result judgment on the display screen 18.

[0045] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0046] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention.

Claims

1. A sewing machine electromagnet magnetic force testing device, the electromagnet (13) comprising a housing, a coil and a guide rod (9), the coil being loosely sleeved on the guide rod (9), the guide rod (9) being slidably matched with the housing, and the coil being able to drive the guide rod (9) to move axially when energized; characterized in that: It comprises a workbench (1), a motor (2), a screw rod (5), a slider (7), a pressure sensor (8) and a base (10); The motor (2) and the base (10) are both fixed on the workbench (1); the slider (7) is located between the motor (2) and the base (10), and the slider (7) is slidably mounted on the workbench (1); the pressure sensor (8) is located between the base (10) and the slider (7), and the pressure sensor (8) is fixed on the slider (7); the screw rod (5) is threadedly connected to the slider (7), one end of the screw rod (5) extends from the slider (7) and is transmission-connected to the motor (2); the electromagnet (13) is mounted on the base (10), and the pressure sensor (8) is coaxially arranged with a guide rod (9) of the electromagnet (13); When testing the magnetic force of the electromagnet (13), the motor (2) can drive the slider (7) to move through the screw rod (5) to determine the distance between the slider (7) and the electromagnet (13). After the electromagnet (13) is energized, the guide rod (9) can hit the pressure sensor (8) to feedback the magnetic force of the electromagnet (13) through the pressure sensor (8).

2. A sewing machine electromagnet magnetic force testing device according to claim 1, characterized in that: A mounting frame (3) and a slide rail (6) are fixed on the workbench (1), a motor (2) is mounted on the mounting frame (3), a slider (7) is mounted on the slide rail (6), a motor shaft of the motor (2) is connected to a screw rod (5) via a coupling (4), and the motor shaft, the screw rod (5) and the pressure sensor (8) are coaxially arranged.

3. A sewing machine electromagnet magnetic force testing device according to claim 2, characterized in that: The workbench (1) is provided with a first positioning hole (20), a second positioning hole (21) and a third positioning hole (22); the mounting frame (3) is connected to the first positioning hole (20) by means of bolts; the slide rail (6) is connected to the second positioning hole (21) by means of bolts; and the base (10) is connected to the third positioning hole (22) by means of bolts.

4. A sewing machine electromagnet magnetic force testing device according to claim 1, characterized in that: It also includes a controller for controlling the movement of the motor (2) and the on and off of the electromagnet (13).

5. A sewing machine electromagnet magnetic force testing device according to claim 4, characterized in that: It also includes a display screen (18) for displaying data. The controller is electrically connected to the display screen (18), and a user can observe and adjust the data through the display screen (18).

6. A sewing machine electromagnet magnetic force testing device according to claim 4, characterized in that: It also includes an indicator light (19) for providing feedback on whether the electromagnet (13) is qualified, and the indicator light (19) is electrically connected to the controller.

7. A sewing machine electromagnet magnetic force testing device according to claim 4, characterized in that: It also includes a wiring switch, the wiring switch (17) is electrically connected to the electromagnet (13), and the wiring switch (17) is used to control the on and off of power to the electromagnet (13).

8. The sewing machine electromagnet magnetic force testing device according to claim 1, characterized in that: It also includes a plurality of fences (15), the fences (15) being fixed on the workbench (1), and the plurality of fences (15) enclosing a working cavity with an opening facing forward; the motor (2), the slider (7) and the base (10) are all located in the working cavity.

9. A sewing machine electromagnet magnetic force testing device according to claim 8, characterized in that: A grating (16) for blocking the opening of the working chamber is installed on the fence (15).

10. The sewing machine electromagnet magnetic force testing device according to claim 1, characterized in that: A plurality of support columns (14) are fixed to the bottom of the workbench (1).

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