A test device for an electromagnetic trip unit

Abstract

The utility model discloses a test device of electromagnetic tripping device, include: test substrate, positioning mechanism is located test substrate for fixed electromagnetic tripping device's casing, push and press part is used for abutting the top rod, the connecting portion is connected with push and press part, and the connecting portion and push and press part can synchronous relative test substrate positive or reverse movement, drive mechanism is used for driving push and press part positive movement to make the top rod be in retracted state, interface is used for with host computer electricity connection, switch is connected with interface electricity, and switch has mechanical trigger part, and mechanical trigger part abuts with connecting portion, and mechanical trigger part is used for being pressed after push and press part reverse movement, makes switch conduction, and switch sends test signal to host computer through interface, and clamp wire device is connected with interface electricity, is used for power supply to electromagnetic tripping device to make the top rod switch from retracted state to the state of extension to drive push and press part reverse movement. The utility model discloses can improve the service life and stability of test device.

Description

Technical Field

[0001] This utility model relates to the field of testing technology, and in particular to a testing device for an electromagnetic tripping device. Background Technology

[0002] A circuit breaker is an electrical switch with multiple protection functions, including overload, short circuit, leakage current, and over / under voltage protection. It is widely used in the low-voltage electrical appliance field. The electrical accessories of a circuit breaker include electromagnetic trip devices and operating mechanisms. The electromagnetic trip device (EMR) is a relatively independent component of the circuit breaker, which triggers the operating mechanism to disconnect the circuit.

[0003] Before being installed in circuit breakers, EMR products require separate testing for their pull-in current. This pull-in current testing typically uses highly elastic beryllium bronze plates or photoelectric switches as the on / off circuit signal control mechanism. However, control mechanisms made of beryllium bronze have a short lifespan, generally only 1 to 2 months. Furthermore, the on / off circuit signals generated by control mechanisms or photoelectric switches made of beryllium bronze plates are unreliable, easily leading to erroneous test results during EMR product testing, thus reducing the EMR product's pass rate. Utility Model Content

[0004] The purpose of this invention is to solve the problems of short service life and poor stability of the on / off circuit signal control mechanism in testing electromagnetic tripping devices. This invention provides a testing device for electromagnetic tripping devices, which can significantly improve the reliability of the on / off circuit signal and increase testing accuracy.

[0005] To address the aforementioned technical problems, this utility model discloses a testing device for an electromagnetic tripping device, comprising: a test base plate; a positioning mechanism disposed on the test base plate for fixing the housing of the electromagnetic tripping device; a pushing part for abutting the top rod; a connecting part connected to the pushing part, wherein the connecting part and the pushing part are capable of synchronously moving forward or backward relative to the test base plate; a driving mechanism for driving the pushing part to move forward, thereby placing the top rod in a retracted state; an interface for electrically connecting to a host computer; a switch electrically connected to the interface, the switch having a mechanical trigger part abutting the connecting part, the mechanical trigger part being pressed after the pushing part moves in the reverse direction, thereby turning on the switch, and the switch sending a test signal to the host computer through the interface; and a wire clamp electrically connected to the interface for supplying power to the electromagnetic tripping device, thereby switching the top rod from the retracted state to the extended state and driving the pushing part to move in the reverse direction.

[0006] Using the above technical solution, the testing device of this application embodiment includes a switch, a connecting part, and a pushing part. During the test, the mechanical triggering part of the switch abuts against the connecting part and maintains pressure on the connecting part. The connecting part is connected to the pushing part and can move synchronously in the forward direction, so that when the push rod is in the retracted state (i.e., the electromagnetic tripping device is in the attracted state), the pushing part can remain in contact with the push rod. This ensures that the pushing part can receive the pushing force from the push rod when the push rod switches from the retracted state to the extended state (i.e., the electromagnetic tripping device is in the released state), thereby improving the stability of the testing device and reducing the stroke of the push rod pushing out of the pushing part. That is, reducing the stroke required for the push rod to make the pushing part and the connecting part move synchronously in the opposite direction to make the switch conduct, thereby improving the accuracy of the testing device.

[0007] Furthermore, during the test, after the push rod switches from the retracted state to the extended state, it drives the pushing part, causing the pushing part and the connecting part to move synchronously in opposite directions to press the mechanical trigger part of the switch, thereby turning on the switch, generating a conduction signal (i.e., the aforementioned test signal), and sending this signal to the host computer. Compared with test devices using control mechanisms in the form of beryllium bronze sheets, the test device of this application embodiment forms a control mechanism using mechanical transmission through the transmission connection between the push rod, the pushing part, the connecting part, and the switch, rather than relying on the elasticity of the beryllium bronze sheet material itself. Therefore, the test results are not affected by installation stress, temperature, or wear and tear from long-term use. Thus, the test device of this application embodiment has high stability and a long service life, reducing the failure rate of the test device, ensuring the accuracy of the test results, improving the pass rate of electromagnetic tripping device products, and thereby reducing the repair costs of electromagnetic tripping device products.

[0008] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a testing device for an electromagnetic tripping device, wherein the connecting part is connected to the test substrate in a manner that allows it to rotate in either the forward or reverse direction around a first direction, wherein the first direction is perpendicular to the test substrate.

[0009] By adopting the above technical solution, on the one hand, the rotating structure of this application embodiment makes the movement accuracy of the connecting part and the pushing part of this application embodiment high; on the other hand, since the torque driving the connecting part to rotate relative to the test substrate is related to the distance between the force point of the connecting part and the rotation center, adjusting the position of the force point of the connecting part can adjust the torque generated by the push rod through the pushing part, or by the mechanical trigger part to the connecting part, so that the torque can meet the requirements of the switch conduction during the test, reducing the requirements of the push rod ejection force and the design pressure value of the mechanical trigger part of this application embodiment, and can be applied to test scenarios of electromagnetic tripping devices or switches with different specifications, thus improving the applicability of the test device of this application embodiment.

[0010] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a testing device for an electromagnetic tripping device, wherein the connecting part is connected to the test substrate in a manner that can be translated in a forward or reverse direction along a second direction, the second direction being a direction parallel to the test substrate.

[0011] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a testing device for an electromagnetic tripping device. The testing device further includes: a base disposed on the test substrate, the base having a rotating shaft and a rotating shaft hole corresponding to the rotating shaft, the rotating shaft extending along a first direction, the rotating shaft being rotatably connected to the base via a bearing; a connecting portion having a first end, a second end, and a middle portion, the first end of the connecting portion being fixedly connected to the rotating shaft, the second end of the connecting portion being connected to the pushing portion, and the middle portion of the connecting portion abutting against the mechanical trigger portion.

[0012] By adopting the above technical solution, this bearing structure makes the rotation of the connecting part relative to the base in this application embodiment very flexible, with low motion resistance and high motion accuracy, which can ensure the accuracy of the test results of the test device in this application embodiment.

[0013] According to another specific embodiment of the present invention, the present invention discloses a testing device for an electromagnetic tripping device, wherein the connecting part is provided with a plurality of weight-reducing holes, and the plurality of weight-reducing holes are spaced apart along the extending direction of the connecting part.

[0014] By adopting the above technical solution, the connecting part of the embodiment of this application is provided with multiple weight-reducing holes to reduce the weight of the connecting part, make the swing of the connecting part more flexible, thereby further reducing the motion resistance of the connecting part and improving the motion accuracy of the connecting part, so as to improve the accuracy of the test results of the testing device.

[0015] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a testing device for an electromagnetic tripping device, wherein the material of the connecting part includes at least aluminum alloy or titanium alloy.

[0016] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a testing device for an electromagnetic tripping device, wherein the pushing part is threadedly connected to the second end of the connecting part, and one end extending out of the connecting part is used to abut against the top rod.

[0017] By adopting the above technical solution, the pushing part of the present application embodiment can adjust the distance from the front side of the connecting part to the front end of the pushing part (i.e., the end of the pushing part that extends out of the connecting part) through the threaded connection, so that the end of the pushing part that extends out of the connecting part can meet the test requirement of contacting the front end of the top rod of the electromagnetic tripping device. This allows the test device of the present application embodiment to be applied to test scenarios of electromagnetic tripping devices with top rods of different lengths, further improving the applicability of the test device of the present application embodiment.

[0018] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a testing device for an electromagnetic tripping device. The testing device further includes a first mounting base, which is movably connected to the side wall of the base in a third direction. The switch is disposed on the first mounting base, and the third direction intersects with the first direction.

[0019] By adopting the above technical solution, the testing device of this application embodiment can adjust the position of the first mounting base relative to the base in a third direction. When the switch is installed on the first mounting base, this setting can improve the positional accuracy of the mechanical trigger part and the connecting part of the switch, thereby helping to adjust the torque generated by the mechanical trigger part on the connecting part, as well as the pressure of the connecting part pressing the mechanical trigger part in the reverse movement to make the switch conduct. This allows the testing device of this application embodiment to be applied to testing scenarios of switches with different specifications, further improving the testing accuracy and applicability of the testing device of this application embodiment.

[0020] According to another specific embodiment of the present invention, the present invention discloses a testing device for an electromagnetic tripping device. The first mounting base includes: a first oblong hole, the first oblong hole penetrating the first mounting base along the first direction; and a first screw, along the second direction, the first screw passing through the first oblong hole and threadedly connected to the base, and capable of moving within the first oblong hole along the third direction, the second direction intersecting the third direction.

[0021] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a testing device for an electromagnetic tripping device. The first mounting base further includes a second mounting base, which is connected to the top wall of the first mounting base in a manner movable along a second direction. The switch is disposed on the second mounting base.

[0022] By adopting the above technical solution, the testing device of this application embodiment can adjust the position of the second mounting base relative to the first mounting base along the second direction. When the switch is mounted on the second mounting base, this arrangement not only allows adjustment of the position of the switch relative to the connecting part via the first mounting base along a third direction, but also allows adjustment of the position of the switch relative to the connecting part via the second mounting base along the second direction. This also improves the positional accuracy of the mechanical trigger part and the connecting part of the switch, enhances the testing accuracy and applicability of the testing device of this application embodiment, and makes the position adjustment more flexible.

[0023] According to another specific embodiment of the present invention, the present invention discloses a testing device for an electromagnetic tripping device. The second mounting base includes: a second oblong hole, the second oblong hole penetrating the second mounting base along the first direction; and a second screw, which passes through the second oblong hole and is threadedly connected to the first mounting base along the first direction, and is capable of moving within the second oblong hole along the second direction.

[0024] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a testing device for an electromagnetic tripping device. The testing device further includes a drive bracket, which is connected to the base. The drive mechanism is disposed on the drive bracket and is disposed opposite to the pushing part.

[0025] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a testing device for an electromagnetic tripping device, wherein the driving mechanism includes a cylinder, the cylinder having a piston, and the piston being used to drive the pushing part to move forward.

[0026] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a testing device for an electromagnetic tripping device, wherein the driving mechanism further includes a valve assembly, the valve assembly is connected in series with the cylinder, and the valve assembly is used to control the output force and extension speed of the piston.

[0027] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a testing device for an electromagnetic tripping device. The valve assembly includes a pressure regulating valve, a throttle valve and a solenoid valve connected in series. The pressure regulating valve is used to control the output force of the piston, the throttle valve is used to control the extension speed of the piston, and the solenoid valve is electrically connected to the interface for connecting to the host computer through the interface.

[0028] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a testing device for an electromagnetic tripping device. The positioning mechanism includes: a mounting part disposed on the test substrate; a sliding part connected to the mounting part in a slidable manner along a second direction; the sliding part is provided with a positioning rod, which is used to be inserted into the positioning hole of the housing and restrict the housing from rotating circumferentially around the positioning rod to fix the housing.

[0029] By adopting the above technical solution, the positioning rod can restrict the circumferential rotation of the housing around the positioning rod, thereby controlling the degree of freedom of the electromagnetic tripping device relative to the sliding part in the horizontal direction. This prevents the electromagnetic tripping device from swinging in the horizontal direction, which would cause the push rod to fail to be accurately positioned with the pushing part, affecting the push rod's pushing force on the pushing part, and consequently affecting the pressure of the connecting part on the mechanical trigger part. This would prevent the host computer from correctly receiving the test signal sent by the switch. Such a positioning rod design can improve the positioning accuracy of the electromagnetic tripping device and improve the stability of the test device.

[0030] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a testing device for an electromagnetic tripping device. The positioning mechanism further includes a reset member, the mounting part is provided with a backing plate, the sliding part is provided with a hanging plate, the backing plate and the hanging plate are spaced apart along a second direction, the hanging plate is connected to the reset member, and the reset member is used to apply an elastic force to the hanging plate so that the hanging plate moves away from the backing plate along the second direction.

[0031] Using the above technical solution, the operator can apply pressure between the back plate and the hanging plate with their fingers, so that the sliding part can overcome the resistance of the reset member and slide closer to the back plate under the action of the finger force. After the sliding part is no longer subject to the finger force, it moves away from the back plate under the action of the spring force to return to the starting position, which facilitates the picking and putting away of the electromagnetic release device.

[0032] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a testing device for an electromagnetic tripping device. The testing device further includes a housing, which is disposed on the test substrate and together with the test substrate defines a receiving cavity. The interface and the wire clamp are both disposed on the housing. The switch, base, connecting part, pushing part and driving mechanism are all accommodated in the receiving cavity. A through hole is provided on the housing for one end of the pushing part to pass through so that the one end of the pushing part abuts against the top rod.

[0033] By adopting the above technical solution, the outer shell of the present application embodiment can play a role in waterproofing and dustproofing, so as to prevent the switch, connection part, pushing part and driving mechanism from being interfered with by the outside world during the test, thereby improving the stability of the test device of the present application embodiment and extending its service life.

[0034] According to another specific embodiment of the present invention, a testing device for an electromagnetic tripping device is disclosed, wherein one end of the reset member is connected to the end of the mounting part away from the backing plate, and the other end of the reset member is connected to the hanging plate.

[0035] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a test device for an electromagnetic tripping device, wherein the base is connected to the housing in a manner movable along a third direction.

[0036] By adopting the above technical solution, the testing device of this application embodiment can adjust the position of the base relative to the outer shell along a third direction. This arrangement can improve the positional accuracy of one end of the pushing part and the top rod of the electromagnetic tripping device, so that one end of the pushing part can meet the testing requirements of contacting the front end of the top rod of the electromagnetic tripping device. This allows the testing device of this application embodiment to be applied to testing scenarios of electromagnetic tripping devices with top rods of different specifications, further improving the applicability of the testing device of this application embodiment.

[0037] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a testing device for an electromagnetic tripping device, wherein the housing includes: a third oblong hole, the third oblong hole penetrating the housing along a second direction; and a third screw, which passes through the third oblong hole and is threadedly connected to the base along the second direction, and is capable of moving within the third oblong hole along the third direction.

[0038] To make the above-mentioned contents of this utility model more obvious and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0039] Figure 1A A schematic diagram of the electromagnetic tripping device is shown, in which the push rod is in the extended state;

[0040] Figure 1B A schematic diagram of the electromagnetic tripping device is shown, in which the push rod is in the retracted state;

[0041] Figure 1C An exploded view of the electromagnetic tripping device is shown.

[0042] Figure 1D A top view of the electromagnetic tripping device is shown, with the push rod in the retracted position.

[0043] Figure 1E A top view of the electromagnetic tripping device is shown, with the push rod in the extended position;

[0044] Figure 2A schematic diagram of the structure of a test device with a control mechanism in the form of beryllium bronze plates is shown.

[0045] Figure 3A A schematic diagram of the structure of the testing device provided in an embodiment of this application is shown.

[0046] Figure 3B This diagram illustrates the internal structure of the testing apparatus provided in an embodiment of this application.

[0047] Figure 3C This application provides a schematic diagram of the structure of the testing apparatus according to an embodiment. Figure 2 ;

[0048] Figure 4 A perspective view of the switch, connecting part, pushing part, positioning mechanism, driving mechanism and electromagnetic tripping device provided in the embodiments of this application is shown, wherein the push rod is in the retracted state;

[0049] Figure 5A A perspective view of the switch, connecting part, pushing part, driving mechanism and electromagnetic tripping device provided in the embodiments of this application is shown, wherein the push rod is in the extended state;

[0050] Figure 5B This illustration shows a schematic diagram of the connection portion provided in an embodiment of this application being connected to the base in a forward or reverse translation manner;

[0051] Figure 6 A perspective view of the switch, connecting part, pushing part, and driving mechanism provided in the embodiments of this application is shown;

[0052] Figure 7 A perspective view of the switch, connecting part, pushing part and driving mechanism provided in the embodiments of this application is shown, wherein the rotating shaft is shown in an exploded state;

[0053] Figure 8A A cross-sectional view of the wire clamp provided in an embodiment of this application is shown;

[0054] Figure 8B An exploded view of the wire clamp provided in an embodiment of this application is shown;

[0055] Figure 8C This is a top view of the wire clamp provided in an embodiment of the present application, wherein a gap is formed between the fixing seat and the sliding sleeve;

[0056] Figure 8D A cross-sectional view of the wire clamp provided in an embodiment of this application is shown, wherein a gap is formed between the fixing seat and the sliding sleeve;

[0057] Figure 9 This illustration shows a perspective view of the switch, connecting part, pushing part, positioning mechanism, and driving mechanism provided in an embodiment of this application;

[0058] Figure 10 A perspective view of the first positioning rod and the second positioning rod provided in an embodiment of this application is shown;

[0059] Figure 11 A schematic diagram of a twelve-station testing device provided in an embodiment of this application is shown.

[0060] Explanation of reference numerals in the attached figures:

[0061] 100. Electromagnetic tripping device; 101. Push rod; 102. Housing; 1021. Ejection hole; 1022. Front surface; 103. Positioning hole; 104. Bottom cover; 105. Actuating mechanism; 106. Armature;

[0062] 200. Test device; 210. Base plate; 211. Receiving cavity; 212. Through hole; 220. Housing; 230. Switch; 240. Drive mechanism; 250. Positioning mechanism; 2501. Positioning mechanism near the housing end; 260. Wire clamp; 270. Start button; 280. Interface;

[0063] 300. Testing equipment;

[0064] 310. Test substrate;

[0065] 320. Outer shell; 321. Cover plate; 322. Front panel; 3221. Through hole; 3222. Third oblong hole; 3223. Third screw; 323. Rear plate; 324. Side plate; 325. Receiving cavity;

[0066] 330. Switch; 331. Mechanical trigger; 33101. One end of the mechanical trigger;

[0067] 340, Base; 34001, Side wall of base; 3401, Shaft; 3401a, One end of shaft; 3401b, The other end of shaft; 34011, Retaining ring; 34012, Flat washer; 34013, Anti-loosening nut; 3402, Shaft hole; 34021, Bearing; 3403, First mounting seat; 34031, First oblong hole; 34032, Second mounting seat; 34032a, Second oblong hole; 34033, Second screw; 3404, First screw;

[0068] 341. Connecting part; 34101. One side of the connecting part; 34111. First end; 34111a. Set screw; 34111b. Connecting hole; 34111c. Opening; 34112. Second end; 34113. Middle part; 34114. Weight reduction hole;

[0069] 342, Pushing part; 34201, One end of the pushing part; 34201a, Pushing head; 34202, The other end of the pushing part; 3422, Fastening nut;

[0070] 343. Slide rail;

[0071] 350. Drive mechanism; 351. Drive bracket; 3511. Protrusion; 352. Cylinder; 3521. Piston; 353. Pressure regulating valve; 354. Throttle valve; 355. Solenoid valve;

[0072] 360. Positioning mechanism; 3601. One end of the positioning mechanism; 361. Mounting part; 36101. The end of the mounting part away from the backing plate; 3611. Guide rail; 3612. Backing plate; 3613. Positioning screw; 3614. Washer; 362. Sliding part; 36201. One end of the sliding part; 36202. The end of the sliding part near the backing plate; 3621. First positioning rod; 36211. First part of the first positioning rod; 36212. Second part of the first positioning rod; 36222. Second positioning rod; 36221. First part of the second positioning rod; 36222. Second part of the second positioning rod; 3623. Hanging plate; 363. Reset component; 36301. One end of the reset component; 36302. The other end of the reset component;

[0073] 370. Wire clamp; 371. Fixing base; 3711. Inner cavity; 3712. Through hole; 372. Sliding sleeve; 3721. Positioning hole; 373. Spring; 374. Pressure cap; 3741. Insertion hole; 375. Positioning pin; 376. Mounting and fixing end;

[0074] 380. Start button;

[0075] 390. Interface;

[0076] 400, host computer;

[0077] Z, First direction;

[0078] X, second direction;

[0079] Y, Third-party orientation;

[0080] W1, the distance from the top of the push rod to the front surface of the housing;

[0081] W2, the distance from the top of the push rod to the front surface of the housing;

[0082] R1, positive;

[0083] R2, reverse;

[0084] D. Set the distance;

[0085] G, gap;

[0086] H1, the distance from one end of the mechanical trigger to the rotation center of the connecting part;

[0087] H2, the distance from the push rod to the rotation center of the connecting part. Detailed Implementation

[0088] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model will be presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to this embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived based on the claims of this utility model. To provide a deep understanding of this utility model, many specific details will be included in the following description. This utility model may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0089] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0090] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0091] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0092] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0093] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0094] To improve the pass rate of electromagnetic trip devices installed in circuit breaker products, the electromagnetic trip devices need to undergo separate characteristic tests before installation (e.g., testing whether the pull-in current of the electromagnetic trip device is within the range specified in the process). For testing the pull-in current of the electromagnetic trip device, beryllium bronze plates or photoelectric switches are generally used as the control mechanism for the circuit switching signal. Exemplarily, those skilled in the art will understand that the pull-in current refers to the minimum current required for the electromagnetic trip device to generate a pull-in action.

[0095] The implementation of the above-described electromagnetic tripping device and the test device for using a beryllium bronze sheet as a signal control mechanism for switching circuits will be described in further detail below with reference to the accompanying drawings.

[0096] Figure 1A and Figure 1B A schematic diagram of the electromagnetic tripping device is shown. Figure 1C An exploded view of the electromagnetic tripping device is shown.

[0097] refer to Figure 1A and Figure 1B The electromagnetic tripping device 100 includes a push rod 101, a housing 102, and a positioning hole 103. From an external structural perspective, the only action of the electromagnetic tripping device 100 is the extension and retraction of the push rod 101 relative to the housing 102. From an internal structural perspective, specifically, as... Figure 1C As shown, the housing 102 and the bottom cover 104 together define a space for accommodating the actuating mechanism 105 and the armature 106.

[0098] Those skilled in the art will understand that the actuating mechanism 105 inside the electromagnetic tripping device 100, when not energized, such as Figure 1A As shown, the armature 106 can be in an engaged state under the action of external force and electromagnetic force. When the armature 106 is in the engaged state, the push rod 101 is in a retracted state. That is, the push rod 101 can retract relative to the housing 102 under the action of external force (such as the pushing force applied by the pushing part described later), i.e., the push rod 101 is in a retracted state, and the electromagnetic tripping device 100 is in an engaged state; after the actuation mechanism 105 is energized, under the action of electromagnetic force, the armature 106 will push out the push rod 101, so that the push rod 101 extends out of the housing 102 through the ejection hole 1021, and the push rod 101 is in an extended state. That is to say, when the current flowing through the electromagnetic tripping device 100 is the engaging current, such as Figure 1B As shown, the push rod 101 can extend relative to the housing 102 under the action of electromagnetic force, that is, the push rod 101 is in the extended state and the electromagnetic release device 100 is in the released state.

[0099] For example, the pushing force of the push rod 101 in this embodiment of the application ranges from 0.6N to 0.8N. Figure 1D As shown, when the push rod 101 is in the retracted state, the distance W1 between the top end of the push rod 101 and the front surface 1022 of the housing 102 is 1.3 mm. Figure 1E As shown, when the push rod 101 is in the extended state, the distance W2 between the top end of the push rod 101 and the front surface 1022 of the housing 102 is 3.75 mm, and the extension stroke of the push rod 101 is 2.45 mm.

[0100] Those skilled in the art will understand that the range of the ejection force, the distance between the ejector rod 101 and the housing 102, and the extension stroke of the ejector rod 101 described above are all examples of embodiments of this application. However, embodiments of this application do not specifically limit the range of the ejection force, the distance between the ejector rod 101 and the housing 102, and the extension stroke of the ejector rod 101 for the electromagnetic tripping device 100 product.

[0101] Therefore, in the test of the pull-in current of the electromagnetic trip device 100, by connecting the electromagnetic trip device 100 to power and gradually reducing the current value flowing through the electromagnetic trip device 100 until the push rod 101 of the electromagnetic trip device 100 switches from the retracted state to the extended state, the current value is recorded, and the pull-in current of the electromagnetic trip device 100 can be obtained.

[0102] Figure 2 A schematic diagram of a test apparatus with a control mechanism in the form of beryllium bronze plates is shown. To clearly illustrate the internal structure of the test apparatus 200, Figure 2 The top of the casing 220 is not shown.

[0103] refer to Figure 2 The testing device 200 mainly includes: a base plate 210, a housing 220, a switch 230, a drive mechanism 240, and a positioning mechanism 250. The switch 230 is made of a flexible beryllium bronze sheet, and the drive mechanism 240 is an electromagnet.

[0104] Specifically, such as Figure 2 As shown, along the height direction of the testing device 200 (e.g.) Figure 2 (As shown in the Z-direction), the outer casing 220 is mounted on the base plate 210, and together with the base plate 210, defines the receiving cavity 211. The switch 230 and the drive mechanism 240 are housed within the receiving cavity 211, and the positioning mechanism 250 is mounted on the base plate 210. During the test, as... Figure 2 As shown, the electromagnetic tripping device 100 is installed at one end 2501 of the positioning mechanism near the housing to position the electromagnetic tripping device 100 at the test position.

[0105] like Figure 2 As shown, along the length direction of the testing device 200 (e.g.) Figure 2(As shown in the X direction), switch 230 is positioned opposite to the push rod (not shown) of electromagnetic trip device 100, drive mechanism 240 is positioned opposite to beryllium bronze sheet of switch 230, and a through hole 212 is provided on housing 220 so that drive mechanism 240 can drive beryllium bronze sheet of switch 230 and drive push rod of electromagnetic trip device 100 to return to retracted state. At this time, beryllium bronze sheet abuts against contact, and switch 230 is in conducting state; or, when push rod of electromagnetic trip device 100 switches from retracted state to extended state, it can pass through through hole 212 and actuate beryllium bronze sheet of switch 230 so that beryllium bronze sheet of switch 230 separates from contact. At this time, switch 230 is in disconnected state.

[0106] In addition, continue to refer to Figure 2 The testing device 200's housing 220 is also equipped with two wire clamps 260, a start button 270, and an interface 280. During testing, the two wire clamps 260 can respectively clamp the two wires (not shown in the figure) of the electromagnetic trip device 100 to supply power to it. The switch 230, drive mechanism 240, two wire clamps 260, and start button 270 are all electrically connected to the interface 280, allowing an external host computer (not shown in the figure) to access the interface 280 and send control commands to the aforementioned components to execute automatic testing programs, or to receive on / off circuit signals from the switch 230 to determine the on / off state of the switch 230. Furthermore, when the host computer receives an off signal from the switch 230, it records the current value flowing through the electromagnetic trip device 100 at that time, thus obtaining the pull-in current of the electromagnetic trip device 100. By determining whether the pull-in current value falls within the range specified in the process, the pass / fail status of the electromagnetic trip device 100 can be determined.

[0107] However, in the aforementioned control mechanism with beryllium bronze plates, on the one hand, although the beryllium bronze plates of the switch 230 have good elasticity and conductivity, they are directly used as contact pieces and repeatedly rubbed and switched on and off during frequent operation tests, resulting in rapid wear and short service life; on the other hand, since the on / off circuit action point of the control mechanism with beryllium bronze plates depends on the stiffness, shape, installation method, and aging degree of the spring (i.e., beryllium bronze plate), the accuracy is low and the consistency is poor. As a result, the test results of the aforementioned test device 200 on the electromagnetic tripping device are easily affected by installation stress, temperature, and wear caused by long-term use, which can easily lead to misjudgment during the test and affect the pass rate of the electromagnetic tripping device.

[0108] To improve the stability of the on / off circuit signal, this application provides a testing device that uses a switch as the signal conduction element and a pushing part and a connecting part as the moving components between the push rod of the electromagnetic trip device and the mechanical trigger part of the switch. This enables accurate measurement of the pull-in current of the electromagnetic trip device, improves the stability of the measurement results, extends the service life of the testing device, and thus ensures the pass rate of the electromagnetic trip device.

[0109] Figure 3A A schematic diagram of the structure of the testing device provided in an embodiment of this application is shown. Figure 3B This diagram shows the internal structure of the testing device provided in an embodiment of this application. Figure 3C This application provides a schematic diagram of the structure of the testing apparatus according to an embodiment. Figure 2 .

[0110] refer to Figure 3A , Figure 3B and Figure 3C The aforementioned testing device 300 mainly includes: a test substrate 310, a housing 320, a switch 330, a base 340, a connecting part 341, a pushing part 342, a driving mechanism 350, a positioning mechanism 360, a wire clamp 370, a start button 380, and an interface 390. Among them, the switch 330 has a mechanical trigger part 331.

[0111] Specifically, such as Figure 3A and Figure 3B As shown, along the first direction (such as...) Figure 3A and Figure 3B As shown in the Z-direction (i.e., the height direction of the test device 300), the outer shell 320 is mounted on the test substrate 310 and together with the test substrate 310 defines the receiving cavity 325. The switch 330, base 340, connecting part 341, pushing part 342 and drive mechanism 350 are all housed in the receiving cavity 325. The outer shell 320 can serve to waterproof and dustproof, so as to prevent the switch 330, connecting part 341, pushing part 342 and drive mechanism 350 from being interfered with by the outside world during the test, thereby improving the stability and extending the service life of the test device 300 of this application embodiment.

[0112] For example, the first direction Z (i.e., the height direction of the test device 300, perpendicular to the test substrate 310) is perpendicular to the second direction X (i.e., the length direction of the test device 300, parallel to the test substrate 310), the second direction X is perpendicular to the third direction Y (i.e., the width direction of the test device 300), and the third direction Y is perpendicular to the first direction Z. It should be noted that the mutual perpendicularity in this application is not absolute. Approximate perpendicularity due to processing and assembly errors (e.g., an angle of 89.9° between two structural features) is also within the scope of mutual perpendicularity in this application. The definition of mutual perpendicularity will not be repeated below.

[0113] The aforementioned switch 330, drive mechanism 350, two wire clamps 370, and start button 380 are all electrically connected to interface 390 via wires (not shown in the figure) to connect to an external host computer (not shown in the figure), enabling the host computer to access interface 390 and send control commands to the aforementioned components to execute automatic test programs. Specifically, switch 330 transmits test signals (e.g., a switch-on signal) to the host computer; drive mechanism 350 receives commands from the host computer to drive the push-pressing part 342 to move forward; and the two wire clamps 370 are electrically connected to the electromagnetic tripping device 100 to receive commands from the host computer and supply power to the electromagnetic tripping device 100. Exemplarily, interface 390 in this embodiment is an RS232 interface, and the host computer in this embodiment can be an industrial computer.

[0114] Exemplarily, the housing 320 of this application embodiment includes a cover plate 321, a front panel 322, a rear panel 323, and a side panel 324. Along the height direction Z, the cover plate 321 is disposed opposite to the test substrate 310. The front panel 322 is connected to both the cover plate 321 and the test substrate 310. Two wire clamps 370 and a start button 380 are both disposed on the front panel 322. The rear panel 323 is connected to both the cover plate 321 and the test substrate 310. An interface 390 is disposed on the rear panel 323. Along the second direction (e.g., ... Figure 3B As shown in the X direction (i.e., the length direction of the test device 300), the rear plate 323 is arranged opposite to the front plate 322, and the side plate 324 is connected to the front plate 322 and the rear plate 323 respectively. The cover plate 321, the front plate 322, the rear plate 323 and the side plate 324 together with the test substrate 310 form a rectangular cavity 325.

[0115] The aforementioned switch 330, connecting part 341, and drive mechanism 350 are all mounted on the panel 322 via the base 340. Since the pushing part 342 is connected to the connecting part 341, the panel 322 is mounted on the test substrate 310, the base 340 is mounted on the panel 322, and the connecting part 341 is positioned around a first direction (e.g., ...). Figure 4(As shown in the Z-direction) It can be connected to the test substrate 310 in a forward or reverse rotation manner. Furthermore, the pushing part 342 can synchronously move relative to the test substrate 310 with the connecting part 341 around the first direction (e.g., as shown in the Z-direction). Figure 4 (As shown in the Z direction) positive or negative (e.g.) Figure 4 Rotation (as shown in the directions R1 and R2) causes the connecting part 341 and the pushing part 342 to be in the first position (see...) Figure 4 ) and second position (see Figure 5A Switching between the two. This rotating structure makes the connecting part 341 and the pushing part 342 in this embodiment of the application very flexible and with high motion accuracy.

[0116] For example, such as Figure 4 As shown, in this embodiment of the application, the connecting part 341 is a rocker structure that can rotate relative to the base 340, and the pushing part 342 is a pushing rod connected to one end of the connecting part 341. The connecting part 341 and the pushing part 342 together form a linkage mechanism in this embodiment of the application, so that when the linkage mechanism is subjected to the pushing force applied by the top rod 101 to the pushing rod (i.e., the pushing part 342), or when subjected to the pressure applied by the mechanical triggering part 331 to the rocker (i.e., the connecting part 341), the linkage mechanism (i.e., the connecting part 341 and the pushing part 342) can synchronously swing relative to the base 340 in the first direction Z in the forward or reverse direction.

[0117] The aforementioned positioning mechanism 360 is mounted on the test substrate 310 and located outside the receiving cavity 325, such as Figure 3B As shown, the positioning mechanism 360 and the pushing part 342 are located on opposite sides of the panel 322. Exemplarily, the panel 322 of this embodiment has a through hole 3221 for one end 34201 of the pushing part to pass through, so that one end 34201 of the pushing part can abut against the push rod 101 of the electromagnetic release device 100.

[0118] During the testing process, such as Figure 3B As shown, the electromagnetic tripping device 100 is fixed to one end of the positioning mechanism 360 near the receiving cavity 325 (i.e., one end 3601 of the positioning mechanism). Along the length direction (e.g.) Figure 3B(As shown in the X direction), one end 34201 of the pushing part is positioned towards the push rod 101 of the electromagnetic tripping device 100. The mechanical trigger part 331 of the switch 330 is located on the side of the connecting part 341 away from the electromagnetic tripping device 100 and abuts against the connecting part 341. The drive mechanism 350 is positioned towards the other end 34202 of the pushing part. The drive mechanism 350 can drive the other end 34202 of the pushing part to rotate forward R1, so that one end 34201 of the pushing part drives the push rod 101 of the electromagnetic tripping device 100 to reset, and ensures that the push rod 101 of the electromagnetic tripping device 100 is reset to the retracted state (i.e., the electromagnetic tripping device 100 is in the engaged state). At this time, the connecting part 341 and the pushing part 342 are only subjected to the force (i.e., the pressure described later) exerted on the connecting part 341 by the mechanical trigger part 331, and the connecting part 341 and the pushing part 342 are in the first position (see Figure 4 ).

[0119] Those skilled in the art will understand that when the mechanical trigger part 331 of switch 330 is pressed by the designed pressure value, the mechanical trigger part 331 can turn on switch 330, and when the pressure value pressed on the mechanical trigger part 331 of switch 330 is less than the designed pressure value, switch 330 remains in the off state. For example, the switch 330 in this embodiment is a switch of model SS-5GL2, with a designed pressure value of 0.49N. This switch has a mechanical service life of up to 30 million cycles, and the circuit signal transmitted from the switch to the host computer has high stability.

[0120] Therefore, when the connecting part 341 and the pushing part 342 are in the first position (see...) Figure 4 In this embodiment, the switch 330 is configured to maintain a set distance from one side 34101 of the connection portion (see [link]). Figure 9 (As shown in the middle distance D), so that the mechanical trigger part 331 of the switch 330 can maintain pressure on one side 34101 of the connection part, and so that the pressure value of the mechanical trigger part 331 at this time is less than the design pressure value (for example, 0.49N), so as to ensure that the switch 330 is in the open state.

[0121] Furthermore, since the connecting part 341 and the pushing part 342 are from the first position (see...) Figure 4 To the second position (see Figure 5A During the reverse movement, the distance between the switch 330 and one side 34101 of the connecting part continuously decreases, and the pressure on the mechanical trigger part 331 increases. In this embodiment, the switch 330 is positioned at a set distance D from one side 34101 of the connecting part, and the connecting part 341 and the pushing part 342 can also be in a second position (see...). Figure 5AWhen the pressure on the mechanical trigger part 331 of the switch 330 is greater than the design pressure value, the switch 330 is ensured to be turned on. However, it is not limited to this. For example, in other possible embodiments, the pressure on the mechanical trigger part 331 may be sufficient to turn on the switch 330 during the reverse movement of the connecting part 341 and the pushing part 342 from the first position to the second position.

[0122] For example, such as Figure 4 As shown, the distance from one end 33101 of the mechanical trigger portion in this embodiment to the rotation center of the connecting portion 341 (i.e., the axis of the rotating shaft 3401 described later) is (e.g.) Figure 4 The distance H1 (as shown) is 53mm, therefore, the switch 330 can generate a maximum torque of 0.49 * 0.053 = 0.026 NM. The distance from the push rod 101 of the electromagnetic tripping device 100 to the rotation center of the connecting part 341 (as shown) is... Figure 4 The mid-distance (H2 shown) is 68mm, and the range of the push rod 101 of the electromagnetic tripping device 100 is 0.6N to 0.8N. Therefore, the push rod 101 can generate a minimum torque of 0.6 * 0.068 = 0.04 Nm, which is greater than the maximum torque that the switch 330 can generate. In other words, the pushing force of the push rod 101 in this embodiment can drive the connecting part 341 and the pushing part 342 to rotate in opposite directions.

[0123] Furthermore, due to the torque of the drive connection 341 rotating relative to the test substrate 310 and the distance between the force point of the connection 341 and the rotation center (e.g., Figure 4 (As shown in the middle distances H1 and H2) By adjusting the position of the force-bearing point of the connecting part 341, the torque generated by the push rod 101 through the pushing part 342 or the mechanical trigger part 331 on the connecting part 341 can be adjusted so that the torque can meet the requirements of the switch 330 to conduct during the test. This rotating structure design reduces the requirements of the push rod 101 push force and the design pressure value of the mechanical trigger part 331 in this application embodiment, and can be applied to test scenarios of electromagnetic tripping devices 100 or switches 330 with different specifications, thus improving the applicability of the test device 300 in this application embodiment.

[0124] Then, the two clamps 370 are connected to the two wires (not shown in the figure) of the electromagnetic trip device 100 to supply power to the electromagnetic trip device 100, so that current flows through the electromagnetic trip device 100. The host computer controls the current flowing through the electromagnetic trip device 100 to gradually decrease until the top rod 101 of the electromagnetic trip device 100 extends relative to the housing 102, that is, the top rod 101 of the electromagnetic trip device 100 switches from the retracted state to the extended state.

[0125] At this time, the connecting part 341 is subjected to the force (i.e., the pressure mentioned above) applied by the mechanical triggering part 331, and the pushing part 342 is subjected to the ejection force applied by the push rod 101. Since the push rod 101 and the mechanical triggering part 331 are located on opposite sides of the connecting part 341 and the pushing part 342, and the torque generated by the ejection force applied by the push rod 101 is greater than the torque generated by the pressure held by the mechanical triggering part 331, the resultant force on the connecting part 341 and the pushing part 342 drives the connecting part 341 and the pushing part 342 to rotate in the opposite direction R2 to the second position (see Figure 5A The pressure value received by the mechanical trigger 331 is greater than the design pressure value, and the switch 330 is turned on, sending a conduction signal to the host computer, namely the test signal mentioned above. The host computer records the current value flowing through the electromagnetic trip device 100 at this time, and the pull-in current of the electromagnetic trip device 100 can be obtained. Then, by determining whether the pull-in current value falls within the range of the current value specified by the process, it can be determined whether the electromagnetic trip device 100 is qualified.

[0126] In summary, the testing device 300 of this application embodiment includes a switch 330, a connecting part 341, and a pushing part 342. During the test, the mechanical trigger part 331 of the switch 330 abuts against the connecting part 341 and maintains pressure on the connecting part 341. The connecting part 341 is connected to the pushing part 342 and can move synchronously in the forward direction R1. When the push rod 101 is in the retracted state (i.e., the electromagnetic tripping device 100 is in the attracted state), the pushing part 342 can remain in contact with the push rod 101. This ensures that the pushing part 342 can receive the pushing force from the push rod 101 when the push rod 101 switches from the retracted state to the extended state (i.e., the electromagnetic tripping device 100 is in the released state). This improves the stability of the testing device and reduces the stroke of the push rod 101 pushing out the pushing part 342. That is, it reduces the stroke required for the push rod 101 to make the pushing part 342 and the connecting part 341 move synchronously in opposite directions to turn on the switch 330, thereby improving the accuracy of the testing device.

[0127] Furthermore, during the test, after the push rod 101 switches from the retracted state to the extended state, the push rod 101 can drive the pushing part 342 so that the pushing part 342 and the connecting part 341 move in opposite directions to press the mechanical trigger part 331 of the switch 330 so that the switch 330 is turned on, generating a conduction signal (i.e. the test signal mentioned above) and sending the signal to the host computer.

[0128] Compared to the test device 200 which employs a control mechanism in the form of beryllium bronze sheets, the test device 300 of this embodiment forms a mechanical transmission control mechanism through the transmission connection between the push rod 101, the pushing part 342, the connecting part 341, and the switch 330. This mechanism relies on the elasticity of the beryllium bronze sheet material itself, and the test results are unaffected by installation stress, temperature, and wear and tear from long-term use. Therefore, the test device 300 of this embodiment exhibits high stability and a long service life, reducing the failure rate of the test device, ensuring the accuracy of test results, improving the pass rate of the electromagnetic trip device 100, and thus reducing the repair costs of the electromagnetic trip device 100.

[0129] Exemplarily, in some possible implementations, the base 340 of this application embodiment is connected to the panel 322 in a manner movable along a third direction Y. For example... Figure 3B and Figure 3C As shown, panel 322 includes two third oblong holes 3222 and two third screws 3223 corresponding to the two third oblong holes 3222. A base 340 is connected to the inner side of panel 322 along the second direction X. Each third oblong hole 3222 penetrates panel 322 along the second direction X. Along the second direction X, each third screw 3223 passes through the corresponding third oblong hole 3222 and extends into receiving cavity 325, where it is threadedly connected to base 340, and is capable of moving within the third oblong hole 3222 along the third direction Y.

[0130] Therefore, the testing device 300 of this application embodiment can adjust the position of the base 340 relative to the panel 322 by moving the third screw 3223 along the extension direction of the third waist-shaped hole 3222, that is, along the third direction Y. The pushing part 342 is connected to the base 340 through the connecting part 341. In addition, the position of the pushing part 342 relative to the top rod 101 can be adjusted by the third waist-shaped hole 3222 and the third screw 3223, which can improve the positional accuracy of one end 34201 of the pushing part and the top rod 101 of the electromagnetic release device 100.

[0131] The embodiments of this application do not specifically limit the number of the third oblong hole 3222 and the third screw 3223. For example, in other possible implementations, the number of the third oblong hole 3222 and the third screw 3223 may be one, three, four, five or more.

[0132] Furthermore, this application embodiment does not limit the connection method of the base 340 relative to the panel 322, which allows movement along the third direction Y. For example, in other possible embodiments, it can also be connected by a slide rail or a lead screw. Also, this application embodiment does not limit the specific connection structure between the base 340 and the housing 320. For example, in other possible embodiments, the base 340 can also be movably connected to any one or more of the cover plate 321, the rear plate 323, or the side plate 324 in the housing 320.

[0133] For example, in the above embodiments, the connecting part 341 of this application embodiment is rotatably connected to the base 340; however, it is not limited thereto. The connecting part 341 of this application embodiment can also be connected to the base 340 in a forward or reverse translation manner. For example, the connecting part 341 and the pushing part 342 of this application embodiment can also move in a forward or reverse translation relative to the base 340 along the second direction X to transmit the force between the mechanical trigger part 331 and the push rod 101.

[0134] See Figure 5B The connecting part 341 is slidably connected to the base 340 via two slide rails 343 provided on the base 340, so that the connecting part 341 can slide relative to the base 340 in the second direction X in either the forward or reverse direction. Furthermore, this embodiment does not limit the connection method of the connecting part 341 relative to the base 340 in either the forward or reverse direction. For example, in other possible embodiments, the connecting part 341 can also be connected to the base 340 in either the forward or reverse direction via a lead screw.

[0135] This application embodiment does not specifically limit the structure of the outer shell 320, as long as it can jointly define a receiving cavity 325 with the bottom 10 to accommodate the aforementioned components such as the switch 330, base 340, connecting part 341, pushing part 342, and driving mechanism 350. In the above embodiment, the shape of the outer shell 320 is square, but it is not limited to this. For example, the shape of the outer shell 320 in this application embodiment can also be circular, rectangular, or other polygonal shapes. Furthermore, this application embodiment does not specifically limit the layout within the receiving cavity 325, and it can be specifically set according to actual needs. For example, the interface 390 can also be located on the side plate 324, and the start button 380 can also be located on the cover plate 321.

[0136] This application embodiment does not specifically limit the connection method between the switch 330, drive mechanism 350, two wire clamps 370 and start button 380 and the host computer. For example, they can also be connected wirelessly.

[0137] The specific model of the switch 330 is not limited in this application embodiment. As long as it can abut against the connecting part 341 and the torque generated by the push rod 101 is greater than the maximum torque that the switch 330 can generate, so that the push rod 101 in this application embodiment can drive the connecting part 341 and the pushing part 342 to rotate in opposite directions.

[0138] The specific structures of the switch 330, the connecting part 341, and the pushing part 342 described above will be explained in detail below with reference to the accompanying drawings.

[0139] Figure 6 A schematic diagram of the structure of the switch 330, the connecting part 341, and the pushing part 342 provided in the embodiments of this application is shown.

[0140] refer to Figure 6 Along the second direction (such as) Figure 6 As shown in the X direction (i.e., the aforementioned length direction), along the second direction X, the switch 330 is located on one side 34101 of the connecting part, one end 33101 of the mechanical trigger part abuts against one side 34101 of the connecting part, and the pushing part 342 is connected to the connecting part 341 so that the pushing part 342 can move synchronously with the connecting part 341 in the positive direction (e.g., ...). Figure 6 (as shown in the direction of R1) or in the opposite direction (e.g.) Figure 6 (As shown in the R2 direction) rotate, the aforementioned drive mechanism 350 is positioned opposite to the other end 34202 of the pushing part, and during the test, when the electromagnetic tripping device 100 is installed on the positioning mechanism 360, one end 34201 of the pushing part is positioned opposite to the top rod 101 of the electromagnetic tripping device 100.

[0141] like Figure 7 As shown, in some possible embodiments, the base 340 of this application embodiment has a rotating shaft 3401 and a rotating shaft hole 3402 corresponding to the rotating shaft 3401. The rotating shaft 3401 extends along a first direction Z and is rotatably connected to the base 340 through a bearing 34021. Exemplarily, bearings 34021 are provided at both ends of the rotating shaft hole 3402, and both ends of the rotating shaft 3401 pass through the corresponding bearings 34021 and extend out of the rotating shaft hole 3402, so that the rotating shaft 3401 is rotatably connected to the base 340 through the bearings 34021. However, this is not a limitation; the number of bearings 34021 is not limited in this embodiment. For example, in other possible embodiments, the number of bearings 34021 can be one, three, four, five, six, or more.

[0142] Furthermore, the connecting portion 341 in this embodiment of the application has a first end portion 34111, a second end portion 34112, and a middle portion 34113. Wherein, as... Figure 7 As shown and combined Figure 6The first end portion 34111 of the connecting part 341 is provided with a connecting hole 34111b. One end 3401a of the rotating shaft passes through the connecting hole 34111b and is fixedly connected to the first end portion 34111 of the connecting part 341. The second end portion 34112 of the connecting part 341 is connected to the pushing part 342, and the middle part 34113 of the connecting part 341 abuts against one end 33101 of the mechanical trigger part.

[0143] Therefore, when the connecting part 341 is only subjected to the pressure held by one end 33101 of the aforementioned mechanical triggering part, the connecting part 341 can rotate forward R1 together with the pushing part 342. When the pushing part 342 is subjected to the pushing force applied by the push rod 101, the connecting part 341 can rotate in the opposite direction R2 together with the pushing part 342.

[0144] It should be noted that the middle part 34113 of the connecting part 3410 refers to any position between the second end 34112 and the first end 34111 of the connecting part 341.

[0145] This bearing structure makes the rotation of the connecting part 341 in this embodiment of the application very flexible, with low motion resistance and high motion accuracy, ensuring the accuracy of the test results of the testing device in this embodiment of the application. Exemplarily, the connecting part 341 in this embodiment of the application is made of aluminum alloy, and the connecting part 341 has multiple weight-reducing holes 34114. These multiple weight-reducing holes 34114 are spaced apart along the extending direction of the connecting part 341 to reduce the weight of the connecting part 341, making the swing of the connecting part 341 more flexible, further reducing the motion resistance of the connecting part 341, and improving the motion accuracy of the connecting part 341, thereby improving the accuracy of the test results of the testing device.

[0146] However, this application embodiment does not specifically limit the material of the connecting part 341, as long as it can rotate relative to the base 340 so that the host computer can accurately receive the test signal through the switch 330. For example, in other possible embodiments, the connecting part 341 of this application embodiment can also be made of other materials with low density and high hardness, such as titanium alloy.

[0147] For example, such as Figure 7 As shown, in some possible implementations, the two ends of the rotating shaft 3401 in this embodiment of the application are further provided with retaining rings 34011, flat washers 34012, and anti-loosening nuts 34013. Along a third direction (e.g.) Figure 7As shown in the Z direction (i.e., the height direction mentioned above), one end 3401a of the rotating shaft is sequentially equipped with a bearing 34021, a retaining ring 34011, the first end 34111 of the connecting part 341, a flat washer 34012, and a lock nut 34013, and the other end 3401b of the rotating shaft is sequentially equipped with a bearing 34021, a retaining ring 34011, a flat washer 34012, and a lock nut 34013.

[0148] For example, such as Figure 6 and Figure 7 As shown, in some possible embodiments, the first end portion 34111 of the connecting portion 341 further has a fixing portion and an opening 34111c corresponding to the fixing portion. The opening 34111c communicates with the connecting hole 34111b. The fixing portion extends into the opening 34111c and abuts against one end 3401a of the rotating shaft, so that the rotating shaft 3401 is fixedly connected to the first end portion 34111 of the connecting portion 3410 through the fixing portion. The embodiments of this application do not specifically limit the structure of the fixing portion, as long as it enables the rotating shaft 3401 to be fixedly connected to the first end portion 34111 of the connecting portion 341. For example, it can be a set screw 34111a.

[0149] For example, such as Figure 6 and 7 As shown, in some possible embodiments, one end 34201 of the pressing part (i.e., the end of the pressing part 342 extending out of the connecting part 341) of the present application embodiment is provided with a pressing head 34201a. During the test, the pressing head 34201a abuts against the push rod 101. The second end 34112 of the connecting part 341 is provided with a threaded hole (not shown in the figure) corresponding to the other end 34202 of the pressing part. The other end 34202 of the pressing part passes through the threaded hole and is threadedly connected to the second end 34112 of the connecting part 341. 02 is also fitted with a fastening nut 3422 so that the pushing part 342 can adjust the distance from the front side of the connecting part 341 to the front end of the pushing part 342 (i.e. the aforementioned pushing head 34201a) through the threaded connection, so as to meet the test requirement that the pushing head 34201a contacts the front end of the push rod 101 of the electromagnetic tripping device 100 during the test. This allows the test device 300 of the present application embodiment to be applied to the test scenario of electromagnetic tripping devices 100 with push rods 101 of different lengths, further improving the applicability of the test device of the present application embodiment.

[0150] Continue to refer to Figure 6 The testing device 300 in this embodiment further includes a first mounting base 3403. Along the second direction X, the first mounting base 3403 is connected to the side wall 34001 of the base in a manner that allows it to move along the third direction Y.

[0151] For example, such as Figure 6As shown, the first mounting base 3403 has two first oblong holes 34031 and a first screw 3404 corresponding to the two first oblong holes 34031. Along the second direction X, the first mounting base 3403 is connected to the side wall 34001 of the base 340 near the switch 330. Each first oblong hole 34031 penetrates the first mounting base 3403 and extends along a third direction (e.g., ...). Figure 6 (As shown in the Y direction). The first screw 3404 is adapted to the first oblong hole 34031, and the base 340 is provided with a first connecting hole (not shown in the figure) corresponding to the first screw 3404. Along the second direction X, each first screw 3404 passes through the corresponding first oblong hole 34031 and is threadedly connected to the first connecting hole, and each first screw 3404 can move in the corresponding first oblong hole 34031 along the third direction Y.

[0152] Therefore, the testing device of this application embodiment can adjust the position of the first mounting base 3403 relative to the base 340 by moving the first screw 3404 along the extension direction of the first waist-shaped hole 34031, that is, along the third direction Y. This helps to adjust the torque generated by the mechanical trigger part 331 on the connecting part 341, as well as the pressure of the connecting part 341 pressing the mechanical trigger part 331 in the forward movement to turn on the switch 330. This allows the testing device of this application embodiment to be applied to testing scenarios of switches 330 with different specifications, further improving the testing accuracy and applicability of the testing device of this application embodiment.

[0153] And, exemplarily, such as Figure 6 As shown, the first mounting base 3403 in this embodiment of the application also includes a second mounting base 34032, and the switch 330 is disposed on the second mounting base 34032. Along the first direction Z, the second mounting base 34032 is connected to the top wall of the first mounting base 3403 in a manner that allows it to move along the second direction X (not shown in the figure).

[0154] Specifically, the second mounting base 34032 has two second oblong holes 34032a and a second screw 34033 corresponding to the two second oblong holes 34032a. Along the first direction Z, the second mounting base 34032 is connected to the top wall of the first mounting base 3403 (not shown in the figure). The second oblong holes 34032a pass through the second mounting base 34032 and extend along the second direction X. The second screw 34033 is adapted to the second oblong holes 34032a, and the first mounting base 3403 is provided with a second connecting hole (not shown in the figure) corresponding to the second screw 34033. Along the first direction Z, each second screw 34033 passes through the corresponding second oblong hole 34032a and is threadedly connected to the second connecting hole, and each second screw 34033 can move in the corresponding second oblong hole 34032a along the third direction Y.

[0155] Therefore, the testing device of this application embodiment can adjust the position of the second mounting base 34032 relative to the first mounting base 3403 by moving the second screw 34033 along the extension direction of the second oblong hole 34032a, that is, along the second direction X. When the switch 330 is mounted on the second mounting base 34032, this arrangement not only allows the position of the switch 330 relative to the base 340 to be adjusted along the third direction Y through the first oblong hole 34031 of the first mounting base 3403, but also allows the position of the switch 330 relative to the base 340 to be adjusted along the second direction X through the second oblong hole 34032a. This also improves the positional accuracy of the mechanical trigger part 331 and the connecting part 341 of the switch 330, and makes the position adjustment of the switch 330 more flexible.

[0156] As mentioned above, the maximum torque that the switch 330 in this embodiment can generate is related to the distance H1 from one end 33101 of the mechanical trigger to the rotation center of the connecting part 341 (see [reference]). Figure 4 Related to this, and the position of switch 330 can be flexibly adjusted. That is to say, the embodiment of this application can also adjust the distance H1 from one end 33101 of the mechanical trigger part to the rotation center of the connecting part 341 by adjusting the position of switch 330, thereby adjusting the torque generated by switch 330 on connecting part 341.

[0157] Furthermore, by adjusting the positions of the first mounting base 3403 and the second mounting base 34032 relative to the switch 330 and the connecting part 341, on the one hand, the maximum operating pressure requirement of the test device 300 of this application embodiment on the switch 330 is reduced; on the other hand, the push-out force requirement of the test device 300 of this application embodiment on the push rod 101 of the electromagnetic tripping device 100 is reduced, thereby improving the applicability of the test device 300 of this application embodiment.

[0158] Furthermore, in the above embodiments, the test device 300 of this application embodiment has a first mounting base 3403 and a second mounting base 34032, and the switch 330 is disposed on the second mounting base 34032. However, it is not limited to this. In other possible embodiments, the test device 300 of this application embodiment may only have a first mounting base 3403, and the switch 330 is connected to the base 340 through the first mounting base 3403.

[0159] The embodiments of this application do not specifically limit the number of the first oblong hole 34031 and the first screw 3404, and the second oblong hole 34032a and the second screw 34033. For example, in other possible embodiments, the number of the first oblong hole 34031 and the first screw 3404 may be one, three, four, five or more, and the number of the second oblong hole 34032a and the second screw 34033 may be one, three, four, five or more.

[0160] Furthermore, this application embodiment does not limit the connection method of the first mounting base 3403 relative to the base 340 being movable in the third direction Y, or the connection method of the second mounting base 34032 relative to the first mounting base 3403 being movable in the second direction X. For example, in other possible implementations, it can also be connected by a slide rail or a lead screw.

[0161] The aforementioned test device 200, which employs a control mechanism in the form of beryllium bronze plates, typically uses an electromagnet as its power source. However, the electromagnet exerts a large impact force on the electromagnetic tripping device, and its output power and speed are uncontrollable, easily leading to misjudgments by the test device 200 during testing of the electromagnetic tripping device, thus affecting the stability of the test device 200. To reduce the impact force of the power source on the electromagnetic tripping device and improve the stability of the test device, the drive mechanism 350 in the test device 300 of this embodiment uses a power source with controllable output power and speed.

[0162] The specific structure of the drive mechanism 350 will be described in detail below with reference to the accompanying drawings.

[0163] refer to Figure 6 and combined Figure 7 The testing apparatus 300 in this embodiment further includes a drive bracket 351. Exemplarily, the drive mechanism in this embodiment is a cylinder. However, this is not a limitation; the type of drive mechanism is not limited in this embodiment. For example, in other possible implementations, the drive mechanism may also be a servo motor, etc. For ease of explanation, the following example uses a cylinder 352 as the drive mechanism 50.

[0164] Specifically, such as Figure 6 and Figure 7 As shown, cylinder 352 is mounted on drive bracket 351. Cylinder 352 has piston 3521, which can extend relative to cylinder 352 in the second direction X under the drive of gas. In the second direction X, piston 3521 of cylinder 352 is positioned opposite to the other end 34202 of the pushing part, so that piston 3521 of cylinder 352 can output power to the other end 34202 of the pushing part, so that the pushing part 342 and the connecting part 341 rotate together in the forward direction R1, so that one end 34201 of the pushing part drives the push rod 101 and puts the push rod 101 in the retracted state.

[0165] For example, in this embodiment of the application, the drive bracket 351 is connected to the base 340 so that the drive bracket 351 can be adjusted synchronously with the base 340. The top wall of the drive bracket 351 is provided with a protrusion 3511 to fix the cylinder 352. That is, the cylinder 352 passes through the protrusion 3511 along the second direction X and is disposed toward the other end 34202 of the pushing part; however, it is not limited thereto. This embodiment of the application does not specifically limit the structure of the drive bracket 351 and can be adjusted according to the actual situation of the receiving cavity 325.

[0166] And, as Figure 3B and Figure 7 As shown, the drive mechanism 350 in this embodiment further includes a valve assembly connected in series with the cylinder 352, used to control the output force and extension speed of the piston 3521 during testing. Exemplarily, the valve assembly in this embodiment includes a pressure regulating valve 353, a throttle valve 354, and a solenoid valve 355 connected in series. Specifically, the cylinder 352 is connected in series with the pressure regulating valve 353, the throttle valve 354, and the solenoid valve 355. The pressure regulating valve 353 is located on the rear plate 323 and can control the output power of the cylinder 352; the throttle valve 354 is a pipeline-type throttle valve and can control the extension speed of the cylinder 352; the solenoid valve 355 is mounted on the test substrate 310 and electrically connected to the host computer, capable of controlling the flow or interruption of the air path to receive instructions from the host computer to control the piston 3521 of the cylinder 352 to output power to the other end 34202 of the pushing part.

[0167] For example, the cylinder 52 in this embodiment is a spring-loaded return cylinder of model CJPB4-10-B. This cylinder can output a pressure of 0.97N when the air pressure is 0.3Mpa and a pressure of 3.48N when the air pressure is 0.5Mpa. The reset pressure required by the push rod 101 of the electromagnetic tripping device 100 in this embodiment is in the range of 1.5N to 2N. That is, the cylinder 52 in this embodiment only needs to drive the push part 342 within the set air pressure range, and its output force can meet the reset pressure required by the push rod 101 of the electromagnetic tripping device 100 in this embodiment. In other words, the output force can be controlled within the reset pressure range required by the push rod 101 of the electromagnetic tripping device 100 by adjusting the air pressure of the cylinder 52 through the pressure regulating valve 353.

[0168] For example, refer to Figures 8A to 8D and combined Figure 3AIn this embodiment of the application, each of the two wire clamps 370 includes: a fixed base 371, a sliding sleeve 372, a spring 373, a pressure cap 374, a positioning pin 375, and a mounting and fixing end 376. The sliding sleeve 372 is sleeved on the fixed base 371 and has a clearance fit with the fixed base 371 so that the sliding sleeve 372 can slide relative to the fixed base 371. The fixing seat 371 has an inner cavity 3711, in which a spring 373 is provided. Along the second direction X, a pressure cap 374 extends from the end of the fixing seat 371 away from the panel 322 into the inner cavity 3711 and abuts against the spring 373. The fixing seat 371 also has a through hole 3712 extending along the second direction X. The sliding sleeve 372 has a positioning hole 3721 for the positioning pin 375 to pass through. The end of the pressure cap 374 extending into the inner cavity 3711 has an insertion hole 3741 for the positioning pin 375 to pass through. The positioning pin 375 passes through the positioning hole 3721, the through hole 3712 and the insertion hole 3741 on both sides of the fixing seat 371 radially to connect the sliding sleeve 372, the pressure cap 374 and the fixing seat 371 together. Furthermore, along the second direction X, the other end of the mounting base 371 passes through the panel 322 and is mounted on the panel 322 via the mounting end 376. During the test, the mounting end 376 can also be connected to a wire connected to the power supply.

[0169] Therefore, when the pressure cap 374 is pushed by an external force inward along the second direction X (e.g., the pressure of an operator's finger), it will cause the sliding sleeve 372 and the positioning pin 375 to move together toward the spring 373, and compress the spring 373, so that a gap G is formed between the fixed seat 371 and the sliding sleeve 372 (see...). Figure 8C and Figure 8D Furthermore, the wire of the electromagnetic tripping device 100 can be placed in this gap G, and then the external force of pushing the cap 374 is released. Under the action of the elastic force of the spring 373 in the second direction X outward, the sliding sleeve 372 will clamp the wire of the electromagnetic tripping device 100 located in the gap G between the fixed seat 371 and the sliding sleeve 372, so that the wire connected to the mounting fixed end 376 and the wire of the electromagnetic tripping device 100 clamped between the fixed seat 371 and the sliding sleeve 372 can achieve current conduction.

[0170] For example, the mounting base 371 is made of copper, which has good electrical conductivity. The cross-sectional area of ​​the through hole 3712 is rectangular to limit the circumferential swing of the sliding sleeve 372 relative to the mounting base 371. The mounting and fixing end 376 consists of two nuts and a flat washer, which can not only fix the mounting base 371 to the panel 322, but also serve as the access end for clamping the wire that provides current between the two nuts.

[0171] The specific structure of the positioning mechanism 360 will be described in detail below with reference to the accompanying drawings.

[0172] refer to Figure 9 and combined Figure 4 and Figure 3B The positioning mechanism 360 of the testing device in this application embodiment includes a mounting part 361, a sliding part 362, and a reset member 363. Exemplarily, the reset member 363 in this application embodiment is a spring.

[0173] Specifically, such as Figure 9 , Figure 4 as well as Figure 3B As shown, along the second direction X, the mounting portion 361 is provided on the test substrate 310, and the mounting portion 361 and the aforementioned cylinder 352 are located on opposite sides of the pressing portion 342. Along the second direction X, a positioning rod is provided at one end of the sliding portion 362 near the housing 320 (i.e., one end 36201 of the sliding portion) to restrict the movement of the electromagnetic tripping device 100 relative to the sliding portion 362 during the test.

[0174] For example, the housing 301 of the electromagnetic tripping device 100 also includes two sets of positioning holes, each set of positioning holes including two positioning holes 103 disposed opposite to each other along the first direction Z (see Figure 1A and Figure 1B The positioning rod in this embodiment includes a first positioning rod 3621 and a second positioning rod 3622. During the test, the first positioning rod 3621 and the second positioning rod 3622 are respectively inserted into the two positioning holes 103 of the two positioning hole groups of the electromagnetic tripping device 100 to restrict the movement of the electromagnetic tripping device 100 relative to the sliding part 362 and to position the electromagnetic tripping device 100 at the test position.

[0175] For example, such as Figure 10 As shown, the first positioning rod 3621 includes a first part 36211 and a second part 36212. Along the first direction Z, the first part 36211 of the first positioning rod 3621 is located above the second part 36212. The diameter of the first part 36211 is larger than the diameter of the second part 36212. Both the first part 36211 and the second part 36212 of the first positioning rod 3621 are cylindrical, meaning the portion of the first positioning rod 3621 that extends into the two positioning holes 103 is cylindrical. Therefore, when the first part 36211 of the first positioning rod 3621 is inserted into the positioning hole 103, the cylindrical structure allows for control over the degree of freedom of translation of the electromagnetic release device 100 relative to the sliding part 362 in the horizontal direction.

[0176] Furthermore, the second positioning rod 3622 includes a first part 36221 and a second part 36222. Along the first direction Z, the first part 36221 of the second positioning rod 3622 is located above the second part 36222 of the second positioning rod 3622. The diameter of the first part 36221 of the second positioning rod 3622 is larger than the diameter of the second part 36222 of the second positioning rod 3622. The first part 36221 of the second positioning rod 3622 is rhomboid, and the second part 36222 of the second positioning rod 3622 is cylindrical. That is, the part of the second positioning rod 3622 that extends into the two positioning holes 103 is rhomboid. Therefore, when the first part 36221 of the second positioning rod 3622 is inserted into the positioning hole 103, the rhomboid structure can control the degree of freedom of the electromagnetic tripping device 100 relative to the sliding part 362 in the horizontal direction, preventing the electromagnetic tripping device 100 from swinging in the horizontal direction, which would cause the push rod 101 to fail to be accurately positioned with the pushing part 342, affecting the push force of the push rod 101 to drive the pushing part 342, and thus affecting the pressure of the connecting part 341 pressing the mechanical trigger part 331, so that the host computer cannot correctly receive the test signal sent by the switch 330. This design can improve the positioning accuracy of the electromagnetic tripping device 100 and improve the stability of the test device.

[0177] However, this application embodiment does not specifically limit the shape of the first part 36221 of the second positioning rod 3622. For example, in other possible implementations, the first part 36221 of the second positioning rod 3622 may also be a cuboid or other non-circular cylindrical structure.

[0178] And continue to refer to Figure 9 The mounting part 361 is provided with a guide rail 3611 and a backing plate 3612. The guide rail 3611 extends along the second direction X and is provided on the upper surface of the mounting part 361 along the height direction Z. The sliding part 362 is provided on the guide rail 3611 and is slidably connected to the guide rail 3611. Along the second direction X, the backing plate 3612 is provided on the side of the guide rail 3611 away from the pushing part 342. The backing plate 3612 extends along the first direction Z, that is, the backing plate 3612 protrudes from the guide rail 3611 along the first direction Z. The end 36202 of the sliding part near the backing plate is provided with a hanging plate 3623. The hanging plate 3623 extends along the first direction Z, that is, the hanging plate 3623 protrudes from the upper surface of the sliding part 362 along the first direction Z. For example, the mounting portions 361 located on both sides of the guide rail 3611 along the third direction Y are provided with positioning screws 3613 and washers 3614 for positioning the guide rail 3611, so that the guide rail 3611 is centrally positioned on the mounting portion 361.

[0179] For example, such as Figure 9As shown, along the second direction X, one end 36301 of the reset member is connected to the end 36101 of the mounting part 361 away from the back plate, and the other end 36302 of the reset member is connected to the lower end of the hanging plate 3623. That is, along the second direction X, the hanging plate 3623 is located between one end 36301 of the reset member and the back plate 3612, so that the sliding part 362 is elastically slidably connected to the mounting part 361. Thus, the operator can use his finger to apply pressure between the back plate 3612 and the hanging plate 3623, so that the sliding part 362 overcomes the resistance of the reset member 363 and slides close to the back plate 3612 under the action of the finger force. After the sliding part 362 is no longer subjected to the finger force, it returns to the starting position under the action of the spring force, that is, the sliding part 362 abuts against the panel 322, so as to facilitate the removal and placement of the electromagnetic release device 100.

[0180] This application does not specifically limit the connection structure between the reset member 363, the mounting plate 3623, and the mounting part 361. In the above embodiment, the reset member 363 is connected between the mounting part 361 and the mounting plate 3623, and the other end 36302 of the reset member is connected to the lower end of the mounting plate 3623. However, it is not limited to this. In other possible implementations, for example, the other end 36302 of the reset member can also be connected to the side surface of the mounting plate 3623 facing the positioning rod, so that the reset member 363 can move the mounting plate 3623 away from the abutment plate 3612 along the second direction X by the elastic force of the inward contraction of both ends.

[0181] Furthermore, this application embodiment does not specifically limit the connection method of the reset member 363 between the mounting plate 3623 and the mounting part 361. In the above embodiment, the reset member 363 uses the elastic force of inward contraction at both ends to make the mounting plate 3623 move away from the backing plate 3612 along the second direction X; but it is not limited to this. In other possible implementations, for example, the reset member 363 can also be connected to the mounting plate 3623 and the backing plate 3612 respectively, so that the elastic force of outward extension at both ends can make the mounting plate 3623 move away from the backing plate 3612 along the second direction X.

[0182] The following will refer to Figure 11 and combined Figure 3A and Figure 9 The testing process of the testing device in the embodiments of this application will be described in detail.

[0183] For example, the testing process in this embodiment can be implemented by the host computer 400 that accesses the interface 390 of the testing device and executes relevant programs. In this embodiment, all twelve testing devices 300 at each station are connected to the same host computer 400, that is, the host computer 400 can simultaneously control the twelve testing devices 300 at each station to perform testing. However, this is not the only possibility. For example, in other possible implementations, the twelve testing devices 300 at each station can be connected to two, three, four or more different host computers 400. Alternatively, the twelve testing devices 300 at each station controlled by the same host computer 400 can be in different working states, that is, the host computer 400 controls six testing devices 300 to perform testing and controls the other six testing devices 300 to end testing, etc.

[0184] For example, the specific test requirements of the test apparatus in this application embodiment include:

[0185] (1) The working power supply is an AC power supply with a voltage of 230V±(1×15%) and a frequency of 50Hz;

[0186] (2) The number of workstations is 12 (see Figure 11 );

[0187] (3) The current output range is 0.1mA to 30mA DC current;

[0188] (4) The maximum permissible error (MPE) is ±3%;

[0189] (5) The current resolution (i.e., the minimum display value) is 0.01mA;

[0190] (6) The insulation resistance value is greater than or equal to 10MΩ;

[0191] (7) During the test, a yellow light will illuminate on the display device (not shown in the figure);

[0192] (8) The push-out force of the push rod 101 of the electromagnetic tripping device 100 product is in the range of 1.5N to 2N;

[0193] (9) The number of products measured and the number of non-conforming products at each workstation need to be counted and the pass rate calculated. The current value of each pull-in current of the current test product can be queried.

[0194] (10) The test device is easy to install and remove the electromagnetic tripping device. The product is convenient, stable, reliable, and has good consistency. The misjudgment rate is ≤0.1%.

[0195] (11) Failure rate is less than 1%, and the design service life is 10 years.

[0196] The specific testing process is as follows:

[0197] Before starting the test, the operator can rest their thumb on the back plate 3612, use their index finger to pull the hanging plate 3623 backward along the second direction X, and use their other hand to place the electromagnetic tripping device 100 to be tested on the sliding part, so that the two positioning holes on the electromagnetic tripping device 100 are fitted onto the first positioning rod 3621 and the second positioning rod 3622 on the sliding part 362. When the index finger is released, the sliding part 362 and the electromagnetic tripping device 100 are reset under the action of the spring force, so that the front end of the sliding part 362 contacts the panel 322 and is positioned.

[0198] Then, the operator presses the two wires of the electromagnetic trip device 100 into the corresponding two wire clamps 370, and presses the start button 380 to enable the host computer to execute the automatic test program for the electromagnetic trip device 100.

[0199] One specific test process for an embodiment of this application includes:

[0200] First, the host computer transmits a power output command to cylinder 352. The piston 3521 of cylinder 352 extends along the second direction X toward the other end 4302 of the pushing part and pushes the pushing part 342, causing the pushing part 342 and the connecting part 341 to rotate together in the forward direction R1. One end 34201 of the pushing part drives the push rod 101 of the electromagnetic tripping device 100 to retract, ensuring that the push rod 101 is reset to the retracted state (i.e., the electromagnetic tripping device 100 is in the engaged state). At this time, switch 330 is in the open state, and the mechanical trigger part 331 of switch 330 maintains pressure on the connecting part 341, so that both the connecting part 341 and the pushing part 342 are in the first position (see...). Figure 4 Furthermore, the host computer 400 has not yet controlled the supply of power to the electromagnetic tripping device 100;

[0201] Next, the host computer 400 controls the supply of current to the electromagnetic trip device 100 and gradually reduces the current, for example, by a decrease of 0.1mA, with the current holding time being, for example, 100ms, until the push rod 101 switches from the retracted state to the extended state (i.e., the electromagnetic trip device 100 is in the released state). At this time, the push rod 101 pushes one end 34201 of the pressing part, so that the pressing part 342 and the connecting part 341 rotate in the opposite direction R2. The connecting part 341 actuates the mechanical trigger part 331 to put the switch 330 into the conducting state and send a test signal (e.g., a conduction signal) to the host computer 400. The host computer 400 controls the circuit supplying power to the electromagnetic trip device 100 to disconnect. The host computer 400 records the current value flowing through the electromagnetic trip device 100 at this time (i.e., the pull-in current value), thereby obtaining the pull-in current of the electromagnetic trip device 100. The host computer 400 controls the test device 300 to restart the test and cycles for a set number of times (e.g., 30 times).

[0202] Finally, when the pull-in current detected by the host computer 400 is greater than the maximum value of the set current (e.g., 25mA), for example, if the pull-in current is 28mA, and 28mA > 25mA, then the host computer 400 determines that the electromagnetic tripping device 100 is unqualified, displays "Not pull-in" on the display device (not shown in the figure), and illuminates a red light; or,

[0203] When the pull-in current detected by the host computer 400 is less than the maximum set current (e.g., 25mA) but greater than the upper limit of the current range specified by the process (e.g., 15mA), for example, if the pull-in current is 20mA and 15mA < 20mA < 25mA, then the host computer 400 determines that the electromagnetic tripping device 100 is unqualified and displays "High Current" on the display device with a red light; or...

[0204] When the pull-in current detected by the host computer 400 is less than the lower limit of the current range specified in the process (e.g., 5mA), for example, if the pull-in current is 3mA and 3mA < 5mA, then the host computer 400 determines that the electromagnetic tripping device 100 is unqualified, displays "below the lower limit" on the display device, and illuminates a red light; or,

[0205] When the host computer 400 detects that during multiple tests of the electromagnetic trip device 100 (e.g., 20 times) a predetermined number of times, the test result shows that the pull-in current range is greater than a preset value (e.g., 0.6mA), for example, if the pull-in current range is 0.8mA and 0.8mA > 0.6mA, then the host computer 400 determines that the electromagnetic trip device 100 is unqualified, displays "range" on the display device, and illuminates a red light; or,

[0206] When the host computer 400 detects that during multiple tests of the electromagnetic trip device 100 for a set number of times (e.g., 20 times), the pull-in current value and the current range value are within the set current value range, for example, the pull-in current value is 10mA and the current range value is 0.5mA, 5mA < 10mA < 15mA, and 0.5mA < 0.6mA, then the host computer 400 determines that the electromagnetic trip device 100 is qualified and lights up the green light.

[0207] In this application embodiment, the number of test devices 300 in the testing scenario for the electromagnetic tripping device 100 product is not limited, such as... Figure 11 As shown, the above embodiment has a total of 12 testing stations of the testing device 300 for testing, but it is not limited to this. For example, in other possible embodiments, the number of stations of the testing device 300 can be 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13 or more.

[0208] In summary, the testing device of this application embodiment uses a long-life switch 330 as the signal conduction element, which greatly improves the reliability of signal conduction. Furthermore, it uses the connecting part 341 and the pushing part 342 as the motion mechanism for transmitting the force between the push rod 101 of the electromagnetic trip device 100 and the switch 330, and adopts a mechanical transmission control mechanism, which improves the motion accuracy. At the same time, it improves the stability and accuracy of the testing device, increases the pass rate of the electromagnetic trip device 100, and reduces the repair cost of the electromagnetic trip device 100.

[0209] Although the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the present invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the present invention to these descriptions. Those skilled in the art can make various changes in form and detail, including some simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A testing device for an electromagnetic tripping device, the electromagnetic tripping device comprising a housing and a push rod, the push rod being capable of extending or retracting relative to the housing, characterized in that, The testing apparatus includes: Test substrate; A positioning mechanism is provided on the test substrate for fixing the housing of the electromagnetic tripping device; The pushing part is used to abut against the push rod; A connecting part is connected to the pushing part, and the connecting part and the pushing part can move synchronously relative to the test substrate in the forward or reverse direction; A drive mechanism is used to drive the pushing part to move forward so that the push rod is in a retracted state; An interface for connecting to a host computer. A switch is electrically connected to the interface. The switch has a mechanical trigger part that abuts against the connection part. The mechanical trigger part is used to be pressed after the push part moves in the opposite direction, so that the switch is turned on. The switch sends a test signal to the host computer through the interface. The clamp, electrically connected to the interface, is used to supply power to the electromagnetic tripping device so that the push rod switches from the retracted state to the extended state and drives the pushing part to move in the opposite direction.

2. The testing device for the electromagnetic tripping device according to claim 1, characterized in that, The connecting part is connected to the test substrate in a manner that allows it to rotate in either the forward or reverse direction around a first direction, wherein the first direction is perpendicular to the test substrate.

3. The testing device for the electromagnetic tripping device according to claim 1, characterized in that, The connecting part is connected to the test substrate in a manner that allows it to translate forward or backward along a second direction, which is a direction parallel to the test substrate.

4. The testing device for the electromagnetic tripping device according to claim 2, characterized in that, The testing apparatus also includes: A base is disposed on the test substrate. The base has a rotating shaft and a rotating shaft hole corresponding to the rotating shaft. The rotating shaft extends along the first direction and is rotatably connected to the base through a bearing. The connecting part has a first end, a second end, and a middle part. The first end of the connecting part is fixedly connected to the rotating shaft, the second end of the connecting part is connected to the pushing part, and the middle part of the connecting part abuts against the mechanical triggering part.

5. The testing device for the electromagnetic tripping device according to claim 4, characterized in that, The connecting part has multiple weight-reducing holes, which are spaced apart along the extending direction of the connecting part.

6. The testing device for the electromagnetic tripping device according to claim 4, characterized in that, The connecting parts are made of at least aluminum alloy or titanium alloy.

7. The testing device for the electromagnetic tripping device according to claim 4, characterized in that, The pushing part is threadedly connected to the second end of the connecting part, and one end of the connecting part extends out to abut against the push rod.

8. The testing device for the electromagnetic tripping device according to claim 4, characterized in that, The testing device further includes a first mounting base, which is movably connected to the side wall of the base in a third direction. The switch is located on the first mounting base, and the third direction intersects with the first direction.

9. The testing device for the electromagnetic tripping device according to claim 8, characterized in that, The first mounting base includes: A first oblong hole, the first oblong hole extending through the first mounting base along the first direction; A first screw, along a second direction, passes through the first oblong hole and is threadedly connected to the base, and is capable of moving within the first oblong hole along a third direction, the second direction intersecting the third direction.

10. The testing apparatus for the electromagnetic tripping device according to claim 8 or 9, characterized in that, The first mounting base further includes a second mounting base, which is movably connected to the top wall of the first mounting base in a second direction, and the switch is located on the second mounting base.

11. The testing apparatus for the electromagnetic tripping device according to claim 10, characterized in that, The second mounting base includes: The second oblong hole extends through the second mounting base along the first direction; The second screw, along the first direction, passes through the second oblong hole and is threadedly connected to the first mounting base, and is capable of moving within the second oblong hole along the second direction.

12. The testing device for the electromagnetic tripping device according to claim 4, characterized in that, The testing device also includes a drive bracket, which is connected to the base. The drive mechanism is located on the drive bracket and is positioned opposite to the pushing part.

13. The testing device for the electromagnetic tripping device according to claim 12, characterized in that, The drive mechanism includes a cylinder with a piston, the piston being used to drive the pushing part to move forward.

14. The testing device for the electromagnetic tripping device according to claim 13, characterized in that, The drive mechanism also includes a valve assembly connected in series with the cylinder, the valve assembly being used to control the output force and extension speed of the piston.

15. The testing device for the electromagnetic tripping device according to claim 14, characterized in that, The valve assembly includes a pressure regulating valve, a throttle valve, and a solenoid valve connected in series. The pressure regulating valve is used to control the output force of the piston, the throttle valve is used to control the extension speed of the piston, and the solenoid valve is electrically connected to the interface for connecting to the host computer through the interface.

16. The testing device for the electromagnetic tripping device according to claim 1, characterized in that, The positioning mechanism includes: A mounting section is provided on the test substrate; The sliding part is connected to the mounting part in a slidable manner along a second direction. The sliding part is provided with a positioning rod, which is used to be inserted into the positioning hole of the housing and to restrict the housing from rotating around the positioning rod in a circumferential direction, so as to fix the housing.

17. The testing apparatus for the electromagnetic tripping device according to claim 16, characterized in that, The positioning mechanism further includes a reset member, the mounting part is provided with a backing plate, the sliding part is provided with a hanging plate, the backing plate and the hanging plate are spaced apart along the second direction, the hanging plate is connected to the reset member, and the reset member is used to apply an elastic force to the hanging plate so that the hanging plate moves away from the backing plate along the second direction.

18. The testing apparatus for the electromagnetic tripping device according to claim 17, characterized in that, One end of the reset component is connected to the end of the mounting portion away from the backing plate, and the other end of the reset component is connected to the mounting plate.

19. The testing apparatus for the electromagnetic tripping device according to any one of claims 1 to 18, characterized in that, The testing device further includes a housing, which is disposed on the testing substrate and together with the testing substrate defines a receiving cavity. The interface and the wire clamp are both disposed on the housing. The switch, base, connecting part, pushing part and driving mechanism are all accommodated in the receiving cavity. The housing has a through hole for one end of the pushing part to pass through so that one end of the pushing part abuts against the top rod.

20. The testing apparatus for the electromagnetic tripping device according to claim 19, characterized in that, The base is movably connected to the housing in a third direction.

21. The testing apparatus for the electromagnetic tripping device according to claim 20, characterized in that, The outer casing includes: A third oblong hole, wherein the third oblong hole penetrates the outer shell along the second direction; The third screw, along the second direction, passes through the third oblong hole and is threadedly connected to the base, and is capable of moving within the third oblong hole along the third direction.

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