A circuit breaker dual gold performance detection device

Abstract

The utility model belongs to low -voltage electrical apparatus test technical field discloses a kind of circuit breaker double gold performance detection devices, including rack, first electrode assembly, second electrode assembly and detection component, first electrode assembly and second electrode assembly can be relatively close or far away and be located in rack, for placing circuit breaker between them, first electrode assembly and the first wiring end of circuit breaker are electrically connected separately, second electrode assembly and the second wiring end of circuit breaker are electrically connected separately;Detection component is located in rack, test window is opened on shell, and detection component can pass through test window and detect the performance of bimetallic strip. By connecting circuit breaker whole into energized circuit and passing current, the motion state of bimetallic strip under real working condition of circuit breaker can be accurately simulated, since bimetallic strip is placed inside circuit breaker shell, the temperature environment when bimetallic strip works can be accurately simulated, the influence of temperature and other factors on bimetallic strip performance test is eliminated, and the accuracy and reliability of test result are improved.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical appliance testing technology, and in particular to a circuit breaker double-metal performance testing device. Background Technology

[0002] As a core component of circuit breakers, the bimetallic strip plays a crucial role in overload protection. Its working principle is as follows: when an overload current flows through the circuit breaker, the bimetallic strip heats up and bends, deforming and causing a linkage to trip, thus achieving overload protection. To ensure that the bimetallic strip accurately and reliably performs its overload protection function under various operating conditions and to prevent electrical system accidents caused by overloads, the performance of the bimetallic strip needs to be tested to control the quality of the circuit breaker.

[0003] In existing technologies, performance testing of bimetallic strips typically involves testing only the bimetallic strip itself. This is done by clamping the bimetallic strip with a fixture and applying current, or at most by welding the arc-starting plate, flexible connection, bimetallic strip, contact support, contacts, and connecting plate together before data measurement. Regardless of the testing method, the bimetallic strip is not within the enclosed space inside the circuit breaker housing. This results in significant heat loss during testing, and the temperature may not meet the requirements of actual application environments. Therefore, the influence of temperature on bimetallic strip performance testing cannot be eliminated, leading to significant discrepancies between the obtained bimetallic strip motion data and actual operating conditions. Furthermore, existing technologies can only test the performance of a single bimetallic strip, resulting in limited test results and low testing efficiency.

[0004] Therefore, there is an urgent need for a circuit breaker bimetallic performance testing device to solve the above-mentioned problems in the existing technology. Utility Model Content

[0005] The purpose of this invention is to provide a bimetallic strip performance testing device for circuit breakers. When testing the performance of bimetallic strips, it can simulate the movement state of the bimetallic strips under the actual operating conditions of circuit breakers, eliminate the influence of factors such as temperature on the performance testing of bimetallic strips, and improve the accuracy and reliability of the bimetallic strip test results.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A circuit breaker bimetallic performance testing device is provided, comprising:

[0008] frame;

[0009] The first electrode assembly and the second electrode assembly may be disposed relatively close to or far from the frame. A circuit breaker is placed between the first electrode assembly and the second electrode assembly. The circuit breaker includes a housing, a first terminal and a second terminal disposed in the housing and electrically connected, and a bimetallic strip disposed in the housing. The first electrode assembly is detachably electrically connected to the first terminal, and the second electrode assembly is detachably electrically connected to the second terminal.

[0010] A detection component is mounted on the frame, and a test window is provided on the housing. The detection component, the test window, and the bimetallic strip inside the housing are arranged facing each other.

[0011] As an optional solution of the circuit breaker bimetallic performance testing device provided by this utility model, the first electrode assembly is located above the second electrode assembly, and the first terminal is located above the second terminal; the first end of the bimetallic strip is fixed in the housing, the second end of the bimetallic strip can be deformed relative to the first end, and the bimetallic strip has an angle of zero with the horizontal direction or is set at an acute angle relative to the horizontal direction.

[0012] As an optional solution to the circuit breaker double-metal performance testing device provided by this utility model, the circuit breaker double-metal performance testing device also includes an adjustment component;

[0013] The adjustment assembly includes a moving platform and a fixed base. The detection assembly is connected to the moving platform, and the fixed base is connected to the frame. The moving platform is tunably connected to the fixed base along the extension direction of the bimetallic strip.

[0014] As an optional solution of the circuit breaker double gold performance testing device provided by this utility model, the frame is provided with an operation port and connected to a fixed bracket, and the fixed bracket is located between the first electrode assembly and the testing assembly.

[0015] The adjustment assembly also includes an adjustment component, a fixed block, a movable block, a fastening plate, and a locking component;

[0016] The fixed base is connected to the side of the fixed bracket facing away from the first electrode assembly; the fixed block is connected to the fixed base, and the movable block is connected to the moving platform; the adjusting member passes through the fixed block and is threadedly connected to the fixed block, the adjusting member has a pushing end and an operating end respectively disposed on both sides of the fixed block, the pushing end abuts against the movable block, and the operating end passes through the operating port; the fastening plate is connected to the fixed base and is provided with a strip hole, the strip hole extends along the moving direction of the moving platform, and the locking member passes through the strip hole and is threaded onto the moving platform;

[0017] There is an operating interval between the detection component and the first electrode component, and the locking member is located within the operating interval.

[0018] As an optional solution to the circuit breaker bimetallic performance testing device provided by this utility model, the testing components include:

[0019] The mounting frame includes a first connecting plate, a second connecting plate, and a third connecting plate. The third connecting plate is connected between the first connecting plate and the second connecting plate, and together with the first connecting plate and the second connecting plate, it encloses an installation space.

[0020] Multiple displacement sensors are spaced apart in the mounting space and spaced apart from the third connecting plate;

[0021] An isolation sleeve is inserted through the displacement sensor, and an isolation boss is provided around the isolation sleeve, with the isolation boss located between adjacent displacement sensors;

[0022] The first fastener is inserted and connected to the first connecting plate, the isolation sleeve, and the second connecting plate.

[0023] As an optional solution for the circuit breaker double metal performance testing device provided by this utility model, the frame is provided with a through opening; the circuit breaker double metal performance testing device also includes a drive handle, a transmission assembly and a guide rod, the transmission assembly including a transmission shaft, a first connecting rod, a second connecting rod and a connecting seat;

[0024] The drive shaft is rotatably connected to the frame, and the drive handle is connected to the drive shaft to receive external force to drive the drive shaft to rotate; the first end of the first connecting rod is fixedly connected to the drive shaft, the second end of the first connecting rod is hinged to the first end of the second connecting rod, the second end of the second connecting rod is hinged to the connecting seat, the connecting seat passes through the through-hole and is connected to the first electrode assembly; the guide rod is connected to the frame, and the first electrode assembly is provided with a guide sleeve, which is slidably fitted onto the guide rod;

[0025] The guide rod and the first electrode assembly are located on the same side of the frame, and the drive shaft, the first connecting rod and the second connecting rod are located on the side of the frame opposite to the guide rod.

[0026] As an optional solution of the circuit breaker double-metal performance testing device provided by this utility model, the second end of the first connecting rod is provided with a first hinge plate, and a limiting block is protruding on the first hinge plate; a first limiting plane is provided on the limiting block, and a first limiting arc surface is provided on the first hinge plate;

[0027] The first end of the second connecting rod is provided with two second hinge plates spaced apart. The first hinge plate is located between the two second hinge plates and is hinged to the second hinge plates through a first hinge shaft. The second connecting rod is provided with a second limiting plane and a second limiting arc surface located between the two second hinge plates. The first limiting arc surface and the second limiting arc surface protrude toward each other.

[0028] The first electrode assembly has a test position. When the first electrode assembly is in the test position, it clamps the circuit breaker together with the second electrode assembly. The first limiting plane abuts against the second limiting plane, and the first limiting arc surface is in line contact with the second limiting arc surface.

[0029] As an optional solution to the circuit breaker double-metal performance testing device provided by this utility model, the circuit breaker double-metal performance testing device also includes an elastic reset component;

[0030] One end of the elastic reset member is connected to the first electrode assembly, and the other end is connected to the second electrode assembly; the first electrode assembly is used to move towards the second electrode assembly under the elastic force of the elastic reset member and the pushing action of the connecting seat.

[0031] As an optional solution for the circuit breaker bimetallic performance testing device provided by this utility model, the circuit breaker is a multi-pole circuit breaker, which includes multiple first terminals, multiple second terminals, and multiple bimetallic strips. The multiple first terminals, multiple bimetallic strips, and multiple second terminals correspond one-to-one and are electrically connected. The first terminals are provided with a first connection port, and the second terminals are provided with a second connection port.

[0032] The first electrode assembly includes a plurality of first contacts, which are inserted one-to-one into a plurality of first terminals;

[0033] The second electrode assembly includes a plurality of second contacts, which are inserted into a plurality of second terminals in a corresponding manner.

[0034] As an optional solution to the circuit breaker double-metal performance testing device provided by this utility model, the first electrode assembly further includes a first electrode base and a first cover plate;

[0035] The first electrode holder is provided with a plurality of first mounting slots. The first mounting slot has a first mounting opening on the side facing away from the frame and a first outlet on the side facing the second electrode assembly. The first contact is inserted into the first mounting slot through the first mounting opening and extends out through the first outlet. The inner wall of the first mounting slot is recessed with a first snap-fit ​​groove. A first elastic member is provided in the first mounting slot. The first end of the first elastic member is snapped into the first snap-fit ​​groove, and the second end abuts against the first contact. The first cover plate detachably covers the plurality of first mounting slots.

[0036] And / or,

[0037] The second electrode assembly also includes a second electrode holder and a second cover plate;

[0038] The second electrode holder is provided with a plurality of second mounting slots. The second mounting slot has a second mounting opening on the side facing away from the frame and a second outlet on the side facing the first electrode assembly. The second contact is inserted into the second mounting slot through the second mounting opening and extends out through the second outlet. The inner wall of the second mounting slot is recessed with a second snap-fit ​​groove. A second elastic member is provided in the second mounting slot. The first end of the second elastic member is snapped into the second snap-fit ​​groove, and the second end abuts against the second contact. The second cover plate detachably covers the plurality of second mounting slots.

[0039] The beneficial effects of this utility model are:

[0040] This invention provides a bimetallic strip performance testing device for circuit breakers. When testing the performance of the bimetallic strip, the entire circuit breaker containing the bimetallic strip is placed between a first electrode assembly and a second electrode assembly. The first and second electrode assemblies are brought closer together, clamping the circuit breaker in the middle. Simultaneously, the first electrode assembly is electrically connected to the first terminal of the circuit breaker, and the second electrode assembly is electrically connected to the second terminal of the circuit breaker. This sequentially connects the first electrode assembly, the first terminal, the bimetallic strip, the second terminal, and the second electrode assembly to form a current-carrying circuit, allowing current to flow through the bimetallic strip. A test window is opened on the circuit breaker housing, directly opposite the testing assembly mounted on the frame and the bimetallic strip inside the housing. During the current flow process, the testing assembly can detect the performance of the bimetallic strip, such as displacement and deformation rate, through the test window. By connecting the entire circuit breaker to the energized circuit and passing current through it, the deformation and movement of the bimetallic strip under actual operating conditions can be accurately simulated. Since the bimetallic strip is placed inside the circuit breaker housing, there is no heat loss during operation, precisely simulating the temperature environment the bimetallic strip operates in. This eliminates the influence of temperature and other factors on the performance testing of the bimetallic strip, improving the accuracy and reliability of the test results. Furthermore, by clamping and fixing the circuit breaker using the first and second electrode assemblies, electrical connections can be made between the two electrode assemblies and their corresponding terminals, simplifying the wiring process and improving testing efficiency.

[0041] In addition, by connecting the entire circuit breaker to the energized circuit and passing current through it, not only can the performance of the bimetallic strip be tested through the testing components, but other testing equipment can also be connected to test other performance aspects of the circuit breaker, thus expanding the application scope of the circuit breaker bimetallic performance testing device and making it more practical. Attached Figure Description

[0042] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0043] Figure 1 This is a first view of the circuit breaker double-metal performance testing device provided in a specific embodiment of this utility model;

[0044] Figure 2 This is a second view of the circuit breaker bimetallic performance testing device provided in a specific embodiment of this utility model;

[0045] Figure 3 This is a first view of the circuit breaker provided in a specific embodiment of this utility model;

[0046] Figure 4 This is a second view of the circuit breaker provided in a specific embodiment of this utility model;

[0047] Figure 5 This is a third view of the circuit breaker provided in a specific embodiment of this utility model;

[0048] Figure 6 This is a first view of the adjustment component provided in a specific embodiment of this utility model;

[0049] Figure 7 This is a second view of the adjustment component provided in a specific embodiment of this utility model;

[0050] Figure 8 This is a first view of the detection component, adjustment component, and fixing bracket provided in a specific embodiment of this utility model;

[0051] Figure 9 This is a schematic diagram of the structure of the detection component provided in a specific embodiment of this utility model;

[0052] Figure 10 This is a second view of the detection component, adjustment component, and fixing bracket provided in a specific embodiment of this utility model;

[0053] Figure 11 This is an exploded view of the first electrode assembly and the second electrode assembly provided in a specific embodiment of this utility model;

[0054] Figure 12 This is an isometric view of the first electrode assembly and the second electrode assembly provided in a specific embodiment of this utility model.

[0055] Figure 13 This is a third view of the circuit breaker double-metal performance testing device provided in a specific embodiment of this utility model;

[0056] Figure 14 This is the fourth view of the circuit breaker double-metal performance testing device provided in a specific embodiment of this utility model;

[0057] Figure 15 This is an exploded view of the drive handle and transmission assembly provided in a specific embodiment of the present utility model.

[0058] Figure 16 This is a schematic diagram of the structure of the first and second connecting rods provided in a specific embodiment of this utility model;

[0059] Figure 17 This is a schematic diagram of the transmission shaft and the first connecting rod provided in a specific embodiment of this utility model;

[0060] Figure 18This is a schematic diagram of the connecting seat provided in a specific embodiment of this utility model.

[0061] In the picture:

[0062] 1. Frame; 2. First electrode assembly; 3. Second electrode assembly; 4. Detection assembly; 5. Adjustment assembly; 6. Fixing bracket; 7. Drive handle; 8. Transmission assembly; 9. Guide rod; 10. Guide sleeve; 20. Elastic reset component; 30. First hook; 40. Second hook;

[0063] 11. Base; 12. Support plate; 13. Reinforcing plate; 14. Mounting block;

[0064] 121. Operating port; 122. Through port; 123. First wiring port; 124. Second wiring port; 125. Installation notch;

[0065] 141. Supporting ear plate; 142. Extension block; 143. Avoidance notch;

[0066] 21. First contact; 22. First electrode seat; 23. First cover plate; 24. First elastic element; 25. Second fastener;

[0067] 221. First mounting slot;

[0068] 2211, First mounting port; 2212, First outlet; 2213, First snap-fit ​​slot;

[0069] 31. Second contact; 32. Second electrode seat; 33. Second cover plate; 34. Second elastic element; 35. Third fastener;

[0070] 321. Second mounting slot;

[0071] 3211, Second mounting port; 3212, Second outlet; 3213, Second snap-fit ​​slot;

[0072] 41. Mounting frame; 42. Displacement sensor; 43. Isolation sleeve; 44. First fastener; 45. First nut; 46. Fourth fastener;

[0073] 411. First connecting plate; 412. Second connecting plate; 413. Third connecting plate; 414. Installation space;

[0074] 421. First fixed terminal; 422. Second fixed terminal; 423. Signal terminal;

[0075] 431. Isolation protrusion; 432. Through-running section;

[0076] 51. Mobile platform; 52. Fixed base; 53. Adjustable component; 54. Fixed block; 55. Movable block; 56. Fastening plate; 57. Locking component; 58. Cross roller guide; 59. Operating interval;

[0077] 531. Pushing end; 532. Operating end;

[0078] 561. Slotted hole;

[0079] 81. Drive shaft; 82. First connecting rod; 83. Second connecting rod; 84. Connecting seat; 85. First locating pin; 86. Flat key; 87. First hinge shaft; 88. Second locating pin; 89. Second hinge shaft; 810. Third locating pin; 820. First bearing; 830. Second bearing; 840. Third bearing;

[0080] 821. First hinge plate; 822. Limiting block; 823. First limiting plane; 824. First limiting arc surface;

[0081] 831. Second hinge plate; 832. Second limiting plane; 833. Second limiting arc surface;

[0082] 841. Through-hole plate; 842. Third hinge plate; 843. Fixing plate;

[0083] 871. Limiting groove;

[0084] 100. Circuit breaker;

[0085] 101. Housing; 102. First terminal; 103. Second terminal; 104. Bimetallic strip; 105. Coil; 106. Stationary contact; 107. Moving contact; 108. Connecting plate;

[0086] 1011, Test Window;

[0087] 1020, First wiring port; 1021, First wiring frame; 1022, First wiring board; 1023, First wiring screw;

[0088] 1030, Second wiring port; 1031, Second wiring frame; 1032, Second wiring board; 1033, Second wiring screw. Detailed Implementation

[0089] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0090] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0091] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0092] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0093] In this embodiment, the term "and / or" is merely a description of the relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this invention, the character " / " generally indicates that the preceding and following associated objects have an "or" relationship.

[0094] In the embodiments of this utility model, the same reference numerals denote the same parts, and for the sake of brevity, detailed descriptions of the same parts are omitted in different embodiments.

[0095] like Figure 1 and Figure 2As shown, this embodiment provides a circuit breaker bimetallic performance testing device, including a frame 1, a first electrode assembly 2, a second electrode assembly 3, and a testing component 4. The frame 1 serves as the mounting base for the first electrode assembly 2, the second electrode assembly 3, and the testing component 4. The first electrode assembly 2 and the second electrode assembly 3 can be mounted on the frame 1 relatively close to or far apart from each other. It can be understood that the first electrode assembly 2 may be fixedly connected to the frame 1, while the second electrode assembly 3 may be movably connected to the frame 1, with their relative proximity or distance achieved by driving the second electrode assembly 3 to move; alternatively, the second electrode assembly 3 may be fixedly connected to the frame 1, while the first electrode assembly 2 may be movably connected to the frame 1, with their relative proximity or distance achieved by driving the first electrode assembly 2 to move; or both the first electrode assembly 2 and the second electrode assembly 3 may be movably connected to the frame 1, with their relative proximity or distance achieved by driving them to move relative to the frame 1. This embodiment does not impose any specific limitations.

[0096] The circuit breaker 100 is placed between the first electrode assembly 2 and the second electrode assembly 3, in conjunction with... Figure 3 , Figure 4 as well as Figure 5 The circuit breaker 100 includes a housing 101, a first terminal 102 and a second terminal 103 disposed on the housing 101 and electrically connected, and a bimetallic strip 104 disposed inside the housing 101; the first terminal 102 can be electrically connected to the second terminal 103 through the bimetallic strip 104. The first electrode assembly 2 is detachably electrically connected to the first terminal 102, and the second electrode assembly 3 is detachably electrically connected to the second terminal 103; when the first electrode assembly 2 and the second electrode assembly 3 are brought close together to clamp and fix the circuit breaker 100, the two electrode assemblies are respectively electrically connected to their corresponding terminals. The detection assembly 4 is disposed on the frame 1, and a test window 1011 is provided on the housing 101. The detection assembly 4, the test window 1011, and the bimetallic strip 104 inside the housing 101 are arranged facing each other.

[0097] The circuit breaker bimetallic strip performance testing device provided in this embodiment, when testing the performance of the bimetallic strip 104, places the circuit breaker 100 containing the bimetallic strip 104 between the first electrode assembly 2 and the second electrode assembly 3, driving the first electrode assembly 2 and the second electrode assembly 3 to move closer to each other, so that the first electrode assembly 2 and the second electrode assembly 3 can clamp the circuit breaker 100 in the middle. At the same time, the first electrode assembly 2 is electrically connected to the first terminal 102 of the circuit breaker 100, and the second electrode assembly 3 is electrically connected to the second terminal 103 of the circuit breaker 100. Thus, the first electrode assembly 2, the first terminal 102, the bimetallic strip 104, the second terminal 103, and the second electrode assembly 3 are sequentially electrically connected to form a power circuit, so that the bimetallic strip 104 can carry current. By opening a test window 1011 on the housing 101 of the circuit breaker 100, and aligning the test window 1011 with the detection component 4 mounted on the frame 1 and the bimetallic strip 104 inside the housing 101, the detection component 4 can detect the performance of the bimetallic strip 104, such as displacement and deformation rate, through the test window 1011 when current flows through the bimetallic strip 104. By connecting the entire circuit breaker 100 to the energized circuit and flowing current through it, the deformation and movement state of the bimetallic strip 104 under actual operating conditions of the circuit breaker 100 can be accurately simulated. Since the bimetallic strip 104 is placed inside the housing 101 of the circuit breaker 100, there is no heat loss during operation, and the temperature environment in which the bimetallic strip 104 operates can be accurately simulated, eliminating the influence of temperature and other factors on the performance test of the bimetallic strip 104, and improving the accuracy and reliability of the test results of the bimetallic strip 104. Moreover, while clamping and fixing the circuit breaker 100 with the first electrode assembly 2 and the second electrode assembly 3, electrical connection between the two electrode assemblies and the corresponding terminals can be achieved, which simplifies the wiring process and improves testing efficiency.

[0098] In addition, by connecting the circuit breaker 100 as a whole to the energized circuit and passing current through it, not only can the performance of the bimetallic strip 104 be tested through the detection component 4, but other detection equipment can also be connected to test other performance of the circuit breaker 100, thus expanding the application range of the circuit breaker bimetallic performance testing device and making it more practical.

[0099] See Figure 3 , Figure 4 as well as Figure 5 The circuit breaker 100 has a first terminal 102 with a first terminal 1020, and the first electrode assembly 2 can be inserted into the first terminal 1020 to achieve electrical connection with the first terminal 102. The circuit breaker 100 has a second terminal 1030, and the second electrode assembly 3 can be inserted into the second terminal 1030 to achieve electrical connection with the second terminal 103.

[0100] More specifically, the first terminal 102 is provided with a first terminal frame 1021, a first terminal block 1022, and a first terminal screw 1023. The first terminal frame 1021 is fixedly mounted on the housing 101, forming a first terminal opening 1020. The first terminal block 1022 partially passes through the first terminal frame 1021. The first terminal screw 1023 is threaded onto the housing 101, passes through the first terminal frame 1021, and can push against the first terminal block 1022. The lead wire can pass into the gap between the first terminal frame 1021 and the first terminal block 1022, and the first terminal block 1022 can be pressed against the lead wire by tightening the first terminal screw 1023.

[0101] The second terminal 103 is provided with a second terminal frame 1031, a second terminal block 1032, and a second terminal screw 1033. The second terminal frame 1031 is fixedly mounted on the housing 101, forming a second terminal opening 1030. The second terminal block 1032 partially passes through the second terminal frame 1031. The second terminal screw 1033 is threaded onto the housing 101, passes through the second terminal frame 1031, and can push against the second terminal block 1032. The lead wire can be inserted into the gap between the second terminal frame 1031 and the second terminal block 1032, and the second terminal block 1032 can be pressed against the lead wire by tightening the second terminal screw 1033.

[0102] like Figure 4 and Figure 5 As shown, the first wiring screw 1023 is located between the test window 1011 and the bimetallic strip 104. When using this device to perform bimetallic performance testing, the first wiring screw 1023 can be removed to avoid obstructing the testing component 4 from testing the bimetallic strip 104.

[0103] like Figure 1 and Figure 2As shown, in this embodiment, the first electrode assembly 2 is located above the second electrode assembly 3, and the first terminal 102 is located above the second terminal 103. The first end of the bimetallic strip 104 is fixed inside the housing 101, and the second end of the bimetallic strip 104 can deform relative to the first end. The bimetallic strip 104 has an angle of zero with the horizontal direction or is set at an acute angle relative to the horizontal direction. That is, the circuit breaker 100 is vertically placed between the first electrode assembly 2 and the second electrode assembly 3, and the first electrode assembly 2 and the second electrode assembly 3 are vertically close to each other to clamp the circuit breaker 100, i.e., clamping and fixing the circuit breaker 100 in the up-down direction and electrically connecting it to the circuit breaker 100, conforming to the actual installation configuration of the circuit breaker 100. In this configuration of the circuit breaker 100, one end of the bimetallic strip 104 is fixed, and the other end is free, equivalent to a cantilever beam structure. Under actual operating conditions, the bimetallic strip 104 needs to overcome its own weight. In existing technologies, when testing the performance of the bimetallic strip 104, it is vertically fixed, which does not meet the condition of overcoming its own weight, thus resulting in a significant deviation in the performance test results of the bimetallic strip 104. In this embodiment, by clamping and fixing the circuit breaker 100 along the vertical direction, the bimetallic strip 104 inside the circuit breaker 100 is in a cantilever beam posture within the housing 101, satisfying the condition of overcoming its own weight under actual operating conditions. Therefore, the influence of the bimetallic strip 104's own weight on its deformation degree and speed after energization can be eliminated.

[0104] See Figure 4 and Figure 5 The circuit breaker 100 also houses a coil 105, a stationary contact 106, a moving contact 107, and a connecting plate 108 within its housing 101. The second terminal block 1032, coil 105, stationary contact 106, moving contact 107, bimetallic strip 104, connecting plate 108, and first terminal block 1022 constitute the internal circuit of the circuit breaker 100, simulating the circuit containing the bimetallic strip 104 under real-world operating conditions, thus making the deformation data of the bimetallic strip 104 more convincing. Specifically, the first end of the bimetallic strip 104 is fixed to the connecting plate 108, while the second end is a free end, capable of being directly or indirectly connected to the tripping mechanism of the circuit breaker 100.

[0105] For ease of description, the X, Y, and Z directions are introduced. The Z direction is the vertical direction, i.e., the height direction of the device, where the first electrode assembly 2 and the second electrode assembly 3 clamp and fix the circuit breaker 100 along the Z direction; the X direction is the horizontal direction of the device; and the Y direction is the front-back direction of the device. The X, Y, and Z directions are perpendicular to each other. Figure 5 As shown, the bimetallic strip 104 is set at an acute angle to the Y direction. In other circuit breakers 100, the bimetallic strip 104 may also be parallel to the Y direction, in which case the angle with the horizontal direction is zero.

[0106] like Figure 1, Figure 6 as well as Figure 7 As shown, the circuit breaker bimetallic performance testing device also includes an adjustment component 5 for adjusting the position of the testing component 4. Specifically, the adjustment component 5 includes a moving platform 51 and a fixed base 52. The testing component 4 is connected to the moving platform 51, and the fixed base 52 is connected to the frame 1. The moving platform 51 is adjustablely connected to the fixed base 52 along the extending direction of the bimetallic strip 104. See also... Figure 5 The bimetallic strip 104 extends along the Y-direction, meaning the moving platform 51 is adjustablely connected to the fixed base 52 along the Y-direction. When the moving platform 51 is driven to move along the Y-direction on the fixed base 52, the detection component 4 moves synchronously under the drive of the moving platform 51 and can be fixed at any position relative to the fixed base 52 to measure the bimetallic strip 104. By setting the detection component 4 to be position-adjustable, deformation data at multiple positions of the bimetallic strip 104 along the Y-direction can be measured, making the test results of the bimetallic strip 104 more reliable and accurate.

[0107] Specifically, see Figure 12 An operation port 121 is provided on the frame 1, combined with Figure 1 and Figure 8 A fixed bracket 6 is connected to the frame 1. The fixed bracket 6 is located between the first electrode assembly 2 and the detection assembly 4 and is used to install the adjustment assembly 5. The adjustment assembly 5 also includes an adjustment member 53, a fixed block 54, a movable block 55, a fastening plate 56, and a locking member 57. The fixed base 52 is connected to the side of the fixed bracket 6 facing away from the first electrode assembly 2; the fixed block 54 is connected to the fixed base 52, and the movable block 55 is connected to the moving platform 51; the adjustment member 53 passes through the fixed block 54 and is threadedly connected to the fixed block 54. The adjustment member 53 has a pushing end 531 and an operating end 532 respectively located on both sides of the fixed block 54. The pushing end 531 abuts against the movable block 55, and the operating end 532 passes through the operating port 121. The fastening plate 56 is connected to the fixed base 52 and is provided with a strip hole 561. The strip hole 561 extends along the moving direction of the moving platform 51, and the locking member 57 passes through the strip hole 561 and is threaded onto the moving platform 51.

[0108] Before adjusting the detection component 4, loosen the locking member 57 to release the lock between the moving platform 51 and the fixed base 52. When the operating end 532 of the adjusting member 53 is turned, the entire adjusting member 53 can be driven to rotate threadedly on the fixed block 54, thereby realizing the axial movement (movement along the Y direction) of the adjusting member 53. When the pushing end 531 of the adjusting member 53 pushes against the movable block 55 along the Y direction, the movable block 55 can drive the moving platform 51 and the detection component 4 on the moving platform 51 to slide along the Y direction on the fixed base 52. During the sliding process, the strip hole 561 on the fastening plate 56 slides and engages with the locking member 57. When the detection component 4 moves to the appropriate measurement position, tighten the locking member 57 to lock and fix the moving platform 51 and the fixed base 52, ensuring the detection stability of the detection component 4. In this embodiment, by providing an operation port 121 on the frame 1 for the operation end 532 of the adjustment component 53, the tester can operate the drive detection component 4 from the side of the frame 1 facing away from the circuit breaker 100, providing a larger operating space and making adjustment more convenient. Further, see... Figure 2 An operating interval 59 is provided between the detection component 4 and the first electrode component 2, and the locking member 57 is located within this operating interval 59. The setting of this operating interval 59 provides sufficient operating space for screwing the locking member 57, making it convenient for the tester to screw the locking member 57 to quickly fix the position of the detection component 4.

[0109] By setting a fixed bracket 6, the entire adjustment component 5 can be fixed on the fixed bracket 6 first, and then the whole assembly can be fixed on the frame 1 with screws and other fasteners, making assembly more convenient.

[0110] Furthermore, a cross roller guide 58 is provided between the mobile platform 51 and the fixed base 52 to achieve smooth sliding between the two and ensure the moving accuracy of the detection component 4, avoiding movement deviation.

[0111] For example, the adjusting member 53 is a micrometer head, which can precisely control the displacement when turned, thereby precisely controlling the displacement of the detection component 4, so that the detection component 4 accurately reaches each test position of the bimetallic strip 104. For example, the micrometer head has an accuracy of 0.01mm. By rotating the micrometer head, the crossed roller guide 58 drives the moving platform 51 to achieve a movement stroke of ±6mm in the front-to-back direction (Y direction). When the measured position is reached, the moving platform 51 can be fixed by the locking member 57, thereby performing data measurement of the bimetallic strip 104 at that position.

[0112] For example, locking element 57 is a locking screw.

[0113] In this embodiment, the circuit breaker 100 under test can be a single-pole circuit breaker or a multi-pole circuit breaker. Specifically... Figure 1In this circuit breaker, 100 is a multi-pole circuit breaker. The multi-pole circuit breaker includes multiple first terminals 102, multiple second terminals 103, and multiple bimetallic strips 104. The multiple first terminals 102, multiple bimetallic strips 104, and multiple second terminals 103 correspond one-to-one and are electrically connected. Each of the multiple first terminals 102 is provided with a first connection port 1020, and each of the multiple second terminals 103 is provided with a second connection port 1030. See also... Figure 11 and Figure 12 The first electrode assembly 2 includes multiple first contacts 21, which can be inserted into multiple first terminals 1020 in a one-to-one correspondence; the second electrode assembly 3 includes multiple second contacts 31, which can be inserted into multiple second terminals 1030 in a one-to-one correspondence. While realizing the upper and lower clamping and fixing of the circuit breaker 100, the multi-pole circuit breaker is connected to the power-on circuit, thereby measuring the deformation data of each bimetallic strip 104 in the multi-pole circuit breaker through the detection assembly 4.

[0114] Of course, the device can also measure single-pole circuit breakers. By placing the single-pole circuit breaker between the first electrode assembly 2 and the second electrode assembly 3, and using one of the corresponding first contacts 21 and second contacts 31 to clamp the single-pole circuit breaker, it can be connected to the power circuit, thereby simulating the deformation of the bimetallic strip 104 under real working conditions, and data can be obtained through the detection assembly 4.

[0115] See Figure 11 and Figure 12 The first electrode assembly 2 also includes a first electrode base 22 and a first cover plate 23. The first electrode base 22 is provided with a plurality of first mounting slots 221, each corresponding to a plurality of first contacts 21. The first mounting slot 221 has a first mounting opening 2211 on the side facing away from the frame 1 and a first outlet 2212 on the side facing the second electrode assembly 3. The first contact 21 is inserted into the first mounting slot 221 through the first mounting opening 2211 and extends out through the first outlet 2212 to be inserted into the first wiring port 1020 of the circuit breaker 100. The inner wall of the first mounting slot 221 is recessed with a first snap-fit ​​groove 2213, and a first elastic member 24 is provided in each first mounting slot 221. The first end of the first elastic member 24 is snapped into the first snap-fit ​​groove 2213, thereby fixing the position of the first elastic member 24 in the first mounting slot 221, and the second end of the first elastic member 24 abuts against the first contact 21. The first cover plate 23 can be detachably sealed to multiple first mounting slots 221.

[0116] By providing a first mounting port 2211, the first elastic element 24 and the first contact 21 can be easily inserted into the first mounting groove 221 through the first mounting port 2211. After the first contact 21 and the first elastic element 24 are installed, the first cover plate 23 is placed over the multiple first mounting grooves 221, and the first cover plate 23 is detachably connected to the first electrode holder 22 using the second fastener 25. This allows for easy replacement of the first contact 21 and the first elastic element 24 if they are subsequently damaged.

[0117] For example, the first elastic element 24 is a tower-shaped spring with a larger diameter at its upper end, which can be engaged in the first locking groove 2213, and its lower end abuts against the first contact 21. The second fastener 25 can be a screw.

[0118] See also Figure 11 and Figure 12 The second electrode assembly 3 also includes a second electrode holder 32 and a second cover plate 33. The second electrode holder 32 is provided with a plurality of second mounting slots 321, each corresponding to a plurality of second contacts 31. The second mounting slots 321 have a second mounting opening 3211 on the side facing away from the frame 1 and a second outlet 3212 on the side facing the first electrode assembly 2. The second contacts 31 are inserted into the second mounting slots 321 through the second mounting openings 3211 and extend out through the second outlets 3212 to be inserted into the second wiring port 1030 of the circuit breaker 100. The inner wall of the second mounting groove 321 is recessed with a second snap-fit ​​groove 3213. A second elastic member 34 is provided in the second mounting groove 321. The first end of the second elastic member 34 is snapped in the second snap-fit ​​groove 3213, thereby fixing the position of the second elastic member 34 in the second mounting groove 321. The second end of the second elastic member 34 abuts against the second contact 31. The second cover plate 33 can be detachably sealed to cover the multiple second mounting grooves 321.

[0119] By providing a second mounting port 3211, the second elastic element 34 and the second contact 31 can be easily inserted into the second mounting groove 321 through the second mounting port 3211. After installing each second contact 31 and the second elastic element 34, the second cover plate 33 is placed over the multiple second mounting grooves 321, and the second cover plate 33 is detachably connected to the second electrode holder 32 using a third fastener 35. This allows for easy replacement of the second contact 31 and the second elastic element 34 if they are subsequently damaged.

[0120] For example, the second elastic element 34 is a tower-shaped spring with a larger diameter at its lower end, which can be engaged in the second locking groove 3213, and its upper end abuts against the second contact 31. The third fastener 35 can be a screw.

[0121] Both the first elastic element 24 and the second elastic element 34 are telescopic in the Z direction. When the first electrode assembly 2 and the second electrode assembly 3 clamp and fix the circuit breaker 100 in the up-down direction, the first elastic element 24 and the second elastic element 34 are compressed in the Z direction, so that the first contact 21 and the second contact 31 are pressed against the first terminal 1020 and the second terminal 1030 under the action of the corresponding elastic elements. This ensures that the first contact 21 has sufficient contact area with the first terminal block 1022 and the second contact 31 has sufficient contact area with the second terminal block 1032, thus ensuring stable and good contact, reducing contact resistance, and improving the reliability of power supply.

[0122] It should be noted that the first contact 21 and the first terminal 1020, as well as the second contact 31 and the second terminal 1030, are both interference fits.

[0123] In this embodiment, see Figure 1 , Figure 8 , Figure 9 as well as Figure 10 The detection component 4 includes a mounting frame 41, displacement sensors 42, an isolation sleeve 43, and a first fastener 44. The mounting frame 41 includes a first connecting plate 411, a second connecting plate 412, and a third connecting plate 413. The first and second connecting plates 411 and 412 are spaced apart along the X-direction. The third connecting plate 413 connects between the first and second connecting plates 411 and 412, and together with the first and second connecting plates 411 and 412, forms an installation space 414. Multiple displacement sensors 42 are arranged along the X-direction. When the product under test is a multi-pole circuit breaker, each pole of the circuit breaker 100 has a corresponding test window 1011. Multiple displacement sensors 42 and multiple bimetallic strips 104 are aligned one-to-one through the multiple test windows 1011, so that each bimetallic strip 104 can be measured by one displacement sensor 42. The multiple displacement sensors 42 are spaced apart within the installation space 414 of the mounting frame 41 and spaced apart from the third connecting plate 413. The third connecting plate 413 is fixedly connected to the mobile platform 51 by a fourth fastener 46, which is exemplarily a screw. The screw passes through the third connecting plate 413 and is threadedly connected to the mobile platform 51. The gap between the displacement sensor 42 and the third connecting plate 413 is used to allow space for the head of the screw, avoiding interference between the displacement sensor 42 and the screw. An isolation sleeve 43 is provided through the displacement sensor 42. An isolation boss 431 is provided around the isolation sleeve 43. The isolation boss 431 is provided between adjacent displacement sensors 42 to separate adjacent displacement sensors 42, ensuring that there is a gap between the displacement sensors 42, which is conducive to heat dissipation of the displacement sensors 42 and can avoid problems such as short circuits between them. The first fastener 44 passes through and connects the first connecting plate 411, the isolation sleeve 43 and the second connecting plate 412, thereby fixing multiple displacement sensors 42 on the mounting frame 41.

[0124] More specifically, see Figure 10 The isolation sleeve 43 includes a through part 432, which is hollow inside and passes through the displacement sensor 42. The through part 432 is provided with the aforementioned isolation boss 431. Two adjacent displacement sensors 42 are separated by an isolation sleeve 43, so that the displacement sensors 42 are kept apart.

[0125] The first fastener 44 is exemplarily a long screw, which passes through the first connecting plate 411, multiple isolation sleeves 43 and the second connecting plate 412, and is threadedly connected to the first nut 45, thereby fixing multiple displacement sensors 42.

[0126] See Figure 9 The displacement sensor 42 has a first fixed end 421 and a second fixed end 422 arranged diagonally. Isolation sleeves 43 are provided through both the first fixed end 421 and the second fixed end 422 to ensure stable positioning among the multiple displacement sensors 42. Simultaneously, two first fasteners 44 are provided, passing through the multiple isolation sleeves 43 at the positions of the first fixed end 421 and the second fixed end 422 respectively, and are locked in place with corresponding first nuts 45. By diagonally positioning and fixing multiple displacement sensors 42, a better positioning and fixing effect can be ensured while saving the number of isolation sleeves 43 and first fasteners 44.

[0127] Furthermore, the displacement sensor 42 is also equipped with a signal terminal 423, which can emit a signal. The signal passes through the test window 1011 and reaches the bimetallic strip 104 to measure the deformation data of the bimetallic strip 104. Figure 9 As shown, the signal terminal 423 is not blocked by the third connecting plate 413.

[0128] For example, the displacement sensor 42 is a laser displacement sensor that can emit a laser onto the bimetallic strip 104. Combined with the data processing module that is connected to the laser displacement sensor, it can efficiently detect the thermal bending and thermal deformation of the bimetallic strip 104, and organize the measured data to obtain relevant waveform diagrams. It can intuitively display data such as the displacement, bending rate, stability, and whether springback occurs of the bimetallic strip 104.

[0129] It is understandable that the size of the test window 1011 along the Y direction is not less than the travel distance of the moving platform 51, so that the bimetallic strip 104 can be detected through the test window 1011 when the displacement sensor 42 moves to any position.

[0130] In this embodiment, as Figure 13 and Figure 14As shown, the circuit breaker bimetallic performance testing device also includes a drive handle 7, a transmission assembly 8, and a guide rod 9. The drive handle 7 drives the first electrode assembly 2 to move along the Z direction via the transmission assembly 8, so as to move closer to or away from the second electrode assembly 3. The transmission assembly 8 includes a drive shaft 81, a first connecting rod 82, a second connecting rod 83, and a connecting seat 84. The drive shaft 81 is rotatably connected to the frame 1, and the drive handle 7 is connected to the drive shaft 81 to receive external force to drive the drive shaft 81 to rotate. The first end of the first connecting rod 82 is fixedly connected to the drive shaft 81, the second end of the first connecting rod 82 is hinged to the first end of the second connecting rod 83, and the second end of the second connecting rod 83 is hinged to the connecting seat 84. The frame 1 is provided with a through opening 122, and the connecting seat 84 passes through the through opening 122 and is connected to the first electrode seat 22 of the first electrode assembly 2. The guide rod 9 is connected to the frame 1, and a guide sleeve 10 is provided on the first electrode assembly 2, which is slidably fitted onto the guide rod 9.

[0131] The first connecting rod 82, the second connecting rod 83, and the connecting seat 84 constitute a crank-slider mechanism. When the drive handle 7 drives the transmission shaft 81 to rotate the first connecting rod 82, the first connecting rod 82 drives the connecting seat 84 to move along the Z direction via the second connecting rod 83. The connecting seat 84 then drives the first electrode assembly 2 to move. During the movement, the guide sleeve 10 slides along the guide rod 9 to guide the movement of the first electrode assembly 2, improving the movement accuracy and stability. For example, the guide sleeve 10 can be a linear bearing to reduce the resistance during sliding.

[0132] In this embodiment, the guide rod 9 and the first electrode assembly 2 are located on the same side of the frame 1. The drive shaft 81, the first connecting rod 82, and the second connecting rod 83 are located on the side of the frame 1 facing away from the guide rod 9, i.e., on the back side of the frame 1. This provides sufficient space on the front of the frame 1 to arrange the detection assembly 4 and the adjustment assembly 5, resulting in a more rational layout of the components on the frame 1. Specifically... Figure 1 The space above the first electrode assembly 2 is used to arrange the adjustment assembly 5 and the detection assembly 4.

[0133] The first electrode assembly 2 has a test position and a non-test position. When the first electrode assembly 2 moves downward to the test position, it clamps the circuit breaker 100 together with the second electrode assembly 3 and can be electrically connected to the circuit breaker 100. When the first electrode assembly 2 moves upward to the non-test position, the circuit breaker 100 can be picked up and put down.

[0134] like Figure 11 and Figure 13 As shown, the first electrode assembly 2 is in a non-test position at this time, as... Figure 2 and Figure 14As shown, after lifting the drive handle 7, the connecting seat 84 pushes the first electrode assembly 2 down to the test position, where it clamps the circuit breaker 100 together with the second electrode assembly 3. Then, the bimetallic strip 104 inside the circuit breaker 100 housing 101 can be measured using the displacement sensor 42.

[0135] like Figure 16 As shown, the second end of the first connecting rod 82 is provided with a first hinge plate 821, and a limiting block 822 protrudes from the first hinge plate 821; the limiting block 822 is provided with a first limiting plane 823, and the first hinge plate 821 is provided with a first limiting arc surface 824. The first end of the second connecting rod 83 is provided with two second hinge plates 831 spaced apart, with the first hinge plate 821 located between the two second hinge plates 831 and hinged to the second hinge plates 831 via a first hinge shaft 87. The second connecting rod 83 is provided with a second limiting plane 832 and a second limiting arc surface 833 located between the two second hinge plates 831. The first limiting arc surface 824 and the second limiting arc surface 833 protrude towards each other. When the first electrode assembly 2 moves down to the test position under the drive of the drive handle 7 and the transmission assembly 8, the first electrode assembly 2 and the second electrode assembly 3 together clamp the circuit breaker 100, and the first limiting plane 823 abuts against the second limiting plane 832, and the first limiting arc surface 824 makes line contact with the second limiting arc surface 833, such as... Figure 14 The state shown is as follows. When the first limiting plane 823 and the second limiting plane 832 abut, the first link 82 and the second link 83 can no longer move relative to each other, thus restricting the first link 82 and the second link 83 to a collinear state. At the same time, the line contact between the first limiting arc surface 824 and the second limiting arc surface 833 enables the transmission component 8 to self-lock, making the first electrode component 2 stable in the test position and not easily moved. Only when the tester lifts the drive handle 7 can the self-locking effect be released, allowing the first link 82 and the second link 83 to move back to the collinear state. Figure 13 The motion is as shown.

[0136] See Figure 13 , Figure 14 as well as Figure 15 One end of the drive handle 7 is sleeved on the transmission shaft 81. The first positioning pin 85 passes through the drive handle 7 and is also mounted on the transmission shaft 81, so that the drive handle 7 and the transmission shaft 81 are circumferentially limited, thereby enabling the drive handle 7 to drive the transmission shaft 81 to rotate. Furthermore, two first bearings 820 are spaced apart on the frame 1, and both ends of the transmission shaft 81 pass through the inner holes of the two first bearings 820, so that the transmission shaft 81 is rotatably mounted on the frame 1 through the first bearings 820, thereby reducing the rotational resistance of the transmission shaft 81.

[0137] A flat key 86 is provided between the first end of the drive shaft 81 and the first connecting rod 82. The flat key 86 enables the circumferential positioning of the two. When the drive shaft 81 rotates, it can drive the first connecting rod 82 to rotate synchronously around the axis of the drive shaft 81.

[0138] A second bearing 830 is provided at the second end of the first connecting rod 82. A first hinge shaft 87 passes through the inner hole of the second bearing 830. Both ends of the first hinge shaft 87 are respectively mounted on two second hinge plates 831 of the second connecting rod 83. A second locating pin 88 is provided on each of the two second hinge plates 831, and the second locating pin 88 restricts the installation position of the first hinge shaft 87. Specifically, see... Figure 17 Both ends of the first hinge shaft 87 are provided with limit grooves 871, and the second positioning pins 88 on the two second hinge plates 831 are engaged in the corresponding limit grooves 871 to prevent the first hinge shaft 87 from moving axially, limit the position of the first hinge shaft 87, and prevent the first hinge shaft 87 from falling off.

[0139] A third bearing 840 is provided at the second end of the second connecting rod 83. A second hinge shaft 89 passes through the inner hole of the third bearing 840. Both ends of the second hinge shaft 89 are mounted on the connecting seat 84, so that the second connecting rod 83 is rotatably connected to the connecting seat 84 through the third bearing 840, thereby reducing transmission resistance. Figure 18 The connecting seat 84 includes two third hinge plates 842 spaced apart. The second end of the second connecting rod 83 is located between the two third hinge plates 842. Both ends of the second hinge shaft 89 pass through the two third hinge plates 842 and are fixed by third positioning pins 810. Specifically, similar to the first hinge shaft 87, the second hinge shaft 89 is also provided with a limiting groove 871. Each of the two third hinge plates 842 is provided with a third positioning pin 810. The third positioning pin 810 is engaged in the limiting groove 871 on the second hinge shaft 89 to limit the installation position of the second hinge shaft 89 and prevent the second hinge shaft 89 from falling off.

[0140] See Figure 18 The connecting seat 84 also includes a through plate 841 and a fixing plate 843. Two third hinge plates 842 protrude from the through plate 841. The fixing plate 843 is located at the end of the through plate 841 away from the third hinge plates 842. The through plate 841 passes through the through hole 122 on the frame 1. The fixing plate 843 is fixedly connected to the first electrode seat 22 of the first electrode assembly 2 by fasteners such as screws.

[0141] See Figure 1 and Figure 2The circuit breaker bimetallic performance testing device also includes an elastic reset member 20. One end of the elastic reset member 20 is connected to the first electrode assembly 2, and the other end is connected to the second electrode assembly 3. The first electrode assembly 2 is used to move towards the second electrode assembly 3 under the elastic force of the elastic reset member 20 and the pushing action of the connecting seat 84. When the drive handle 7 is lifted to drive the first electrode assembly 2 downward through the transmission assembly 8, the elastic reset member 20 can release elastic potential energy, providing a certain rebound force to allow the first electrode assembly 2 to quickly reach the test position, reducing the force applied by lifting the drive handle 7 and making the testing process more effortless. It can be understood that when the drive handle 7 is rotated downward, the first electrode assembly 2 moves upward, causing the elastic reset member 20 to be stretched.

[0142] For example, the elastic reset member 20 is a tension spring.

[0143] Further, see Figure 1 The first electrode holder 22 is provided with a first hook 30 at both ends along the X direction, and the second electrode holder 32 is provided with a second hook 40 at both ends along the X direction. An elastic reset member 20 is connected between the first hook 30 and the second hook 40 at both ends, so that the first electrode assembly 2 is balanced by force when it moves, and can provide a greater rebound force, so that the first electrode assembly 2 can quickly clamp the circuit breaker 100.

[0144] like Figure 13 As shown, the frame 1 of the device includes a base 11, a support plate 12 and a reinforcing plate 13. The base 11 is horizontally arranged, the support plate 12 is vertically arranged, the aforementioned operation port 121 and through port 122 are both arranged on the support plate 12, and the reinforcing plate 13 is connected between the support plate 12 and the base 11 to improve the connection strength between the two. Multiple reinforcing plates are provided (e.g., two).

[0145] In this embodiment, the reinforcing plate 13 is connected to the side of the support plate 12 facing away from the first electrode assembly 2 and the second electrode assembly 3, thus avoiding occupying the space on the front of the support plate 12. The support plate 12 is also provided with a first wire through-hole 123 facing the first electrode assembly 2 and a second wire through-hole 124 facing the second electrode assembly 3, with the first wire through-hole 123 located above the second wire through-hole 124. The first electrode holder 22 is provided with a first wire through-hole communicating with the first mounting groove 221. A wiring screw is exemplarily connected to the first contact 21, passing through the first wire through-hole and the first wire through-hole 123, and connecting to an external lead. The second electrode holder 32 is provided with a second wire through-hole communicating with the second mounting groove 321. A wiring screw is exemplarily connected to the second contact 31, passing through the second wire through-hole and the second wire through-hole 124, and connecting to an external lead. This rear-side wiring method of the support plate 12 makes reasonable use of its rear space, resulting in a more rational overall device layout.

[0146] Further, see Figure 1 , Figure 13 as well as Figure 14 The frame 1 also includes a mounting block 14. A mounting notch 125 is provided at the upper end of the support plate 12, and the mounting block 14 is secured at this notch 125, ensuring high installation stability. Two support lugs 141 protrude from one side of the mounting block 14, each bearing 820 mounted on it to provide a mounting base for the drive shaft 81. Two extension blocks 142 are provided on the other side of the mounting block 14. These extension blocks 142 are positioned along the X-direction and extend away from each other. A guide rod 9 passes through the extension blocks 142, which are then fixedly connected to the support plate 12 by screws or other fasteners. An clearance notch 143 is provided between the two extension blocks 142 on the mounting block 14. This clearance notch 143 provides space for installing the detection component 4, resulting in a more compact and rational structural layout.

[0147] The usage process of the circuit breaker double-metal performance testing device provided in this embodiment is roughly as follows:

[0148] Before testing, the first electrode assembly 2 is in a non-test position away from the second electrode assembly 3, and the space between them is sufficient to place the circuit breaker 100. Figure 1 As shown. During testing, the circuit breaker 100, containing the bimetallic strip 104 under test, is placed between the first electrode assembly 2 and the second electrode assembly 3, and the second terminal 1030 of the circuit breaker 100 is connected to the second contact 31 of the second electrode assembly 3. Then, the drive handle 7 is raised, causing the drive handle 7 to rotate the transmission shaft 81. The transmission shaft 81 then pushes the first electrode assembly 2 down to the test position via the first connecting rod 82, the second connecting rod 83, and the connecting seat 84, so that the first contact 21 is inserted into the first terminal 1020 of the circuit breaker 100. At this time, the first contact 21 and the second contact 31 clamp the circuit breaker 100 in the vertical direction, connecting the circuit breaker 100 to the energized circuit. Furthermore, the first contact 21 and the second contact 31 maintain elastic contact with the corresponding terminals under the elastic force of the first elastic member 24 and the second elastic member 34, respectively, ensuring sufficient contact area with the corresponding terminal block and improving the reliability of the circuit breaker 100's energization. After the circuit breaker 100 is connected to the energized circuit, the displacement sensor 42 of the detection component 4 can detect the deformation data of the bimetallic strip 104 inside the circuit breaker 100 housing 101 through the test window 1011. By rotating the adjusting component 53 of the adjusting component 5, the position of the displacement sensor 42 can be adjusted, realizing multi-point position detection of the bimetallic strip 104, and the obtained deformation data of the bimetallic strip 104 is more reliable and accurate.

[0149] In summary, when using this device to test the performance of the bimetallic strip 104, it can simulate the motion state of the bimetallic strip 104 under the actual operating conditions of the circuit breaker 100. The environment in which the bimetallic strip 104 is located is the actual operating environment, and it forms a circuit with components such as the coil 105, stationary contact 106, and moving contact 107, making its circuit the actual operating circuit. During the test, the two electrode assemblies clamp the circuit breaker 100 from above and below, so that the bimetallic strip 104 is in a cantilever beam shape, which meets the condition of overcoming its own weight, realizes the simulation of the actual operating conditions, eliminates the influence of temperature and the self-weight of the bimetallic strip 104 on the test results, and can obtain the motion data of the bimetallic strip 104 under the actual operating conditions. The data is reliable, accurate, and has strong reference value, which is conducive to controlling the quality performance of the circuit breaker 100.

[0150] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A circuit breaker bimetallic performance testing device, characterized in that, include: Rack (1); The first electrode assembly (2) and the second electrode assembly (3) are disposed relatively close to or far from the frame (1). A circuit breaker (100) is placed between the first electrode assembly (2) and the second electrode assembly (3). The circuit breaker (100) includes a housing (101), a first terminal (102) and a second terminal (103) disposed in the housing (101 and electrically connected, and a bimetallic strip (104) disposed in the housing (101). The first electrode assembly (2) is detachably electrically connected to the first terminal (102), and the second electrode assembly (3) is detachably electrically connected to the second terminal (103). The detection component (4) is located on the frame (1), and a test window (1011) is provided on the housing (101). The detection component (4), the test window (1011) and the bimetallic strip (104) inside the housing (101) are arranged facing each other.

2. The circuit breaker bimetallic performance testing device according to claim 1, characterized in that, The first electrode assembly (2) is located above the second electrode assembly (3), and the first terminal (102) is located above the second terminal (103); the first end of the bimetallic strip (104) is fixed inside the housing (101), the second end of the bimetallic strip (104) can be deformed relative to the first end, and the bimetallic strip (104) has an angle of zero with the horizontal direction or is set at an acute angle relative to the horizontal direction.

3. The circuit breaker bimetallic performance testing device according to claim 1, characterized in that, The circuit breaker dual-metal performance testing device also includes an adjustment component (5); The adjustment component (5) includes a moving platform (51) and a fixed base (52). The detection component (4) is connected to the moving platform (51), and the fixed base (52) is connected to the frame (1). The moving platform (51) is tunably connected to the fixed base (52) along the extension direction of the bimetallic strip (104).

4. The circuit breaker bimetallic performance testing device according to claim 3, characterized in that, The frame (1) has an operation port (121) and is connected to a fixed bracket (6), which is located between the first electrode assembly (2) and the detection assembly (4). The adjustment assembly (5) further includes an adjustment member (53), a fixed block (54), a movable block (55), a fastening plate (56), and a locking member (57); The fixed base (52) is connected to the side of the fixed bracket (6) facing away from the first electrode assembly (2); the fixed block (54) is connected to the fixed base (52), and the movable block (55) is connected to the moving platform (51); the adjusting member (53) passes through the fixed block (54) and is threadedly connected to the fixed block (54), and the adjusting member (53) has a pushing end (531) and an operating end respectively disposed on both sides of the fixed block (54). The operating end (532) abuts against the movable block (55), and the operating end (532) passes through the operating port (121); the fastening plate (56) is connected to the fixed base (52) and is provided with a strip hole (561), the strip hole (561) extends along the moving direction of the moving platform (51), and the locking member (57) passes through the strip hole (561) and is threaded onto the moving platform (51); There is an operating interval (59) between the detection component (4) and the first electrode component (2), and the locking member (57) is located within the operating interval (59).

5. The circuit breaker bimetallic performance testing device according to claim 1, characterized in that, The detection component (4) includes: The mounting frame (41) includes a first connecting plate (411), a second connecting plate (412) and a third connecting plate (413), wherein the third connecting plate (413) is connected between the first connecting plate (411) and the second connecting plate (412), and together with the first connecting plate (411) and the second connecting plate (412), it encloses an installation space (414). Multiple displacement sensors (42) are spaced apart in the mounting space (414) and spaced apart from the third connecting plate (413); An isolation sleeve (43) is inserted through the displacement sensor (42). An isolation boss (431) is provided around the isolation sleeve (43). The isolation boss (431) is located between adjacent displacement sensors (42). The first fastener (44) is inserted and connected to the first connecting plate (411), the isolation sleeve (43) and the second connecting plate (412).

6. The circuit breaker bimetallic performance testing device according to claim 1, characterized in that, The frame (1) is provided with a through opening (122); the circuit breaker double metal performance testing device also includes a drive handle (7), a transmission assembly (8) and a guide rod (9), the transmission assembly (8) includes a drive shaft (81), a first connecting rod (82), a second connecting rod (83) and a connecting seat (84); The drive shaft (81) is rotatably connected to the frame (1), and the drive handle (7) is connected to the drive shaft (81) to receive external force to drive the drive shaft (81) to rotate; the first end of the first connecting rod (82) is fixedly connected to the drive shaft (81), the second end of the first connecting rod (82) is hinged to the first end of the second connecting rod (83), the second end of the second connecting rod (83) is hinged to the connecting seat (84), the connecting seat (84) passes through the through hole (122) and is connected to the first electrode assembly (2); the guide rod (9) is connected to the frame (1), and the first electrode assembly (2) is provided with a guide sleeve (10), which is slidably sleeved on the guide rod (9); The guide rod (9) and the first electrode assembly (2) are located on the same side of the frame (1), and the drive shaft (81), the first connecting rod (82) and the second connecting rod (83) are located on the side of the frame (1) opposite to the guide rod (9).

7. The circuit breaker bimetallic performance testing device according to claim 6, characterized in that, The second end of the first connecting rod (82) is provided with a first hinge plate (821), and a limiting block (822) is protruding on the first hinge plate (821); a first limiting plane (823) is provided on the limiting block (822), and a first limiting arc surface (824) is provided on the first hinge plate (821); The first end of the second connecting rod (83) is provided with two second hinge plates (831) spaced apart. The first hinge plate (821) is located between the two second hinge plates (831) and is hinged to the second hinge plates (831) through a first hinge shaft (87). The second connecting rod (83) is provided with a second limiting plane (832) and a second limiting arc surface (833) located between the two second hinge plates (831). The first limiting arc surface (824) and the second limiting arc surface (833) protrude toward each other. The first electrode assembly (2) has a test position. When the first electrode assembly (2) is located in the test position, it clamps the circuit breaker (100) together with the second electrode assembly (3). The first limiting plane (823) abuts against the second limiting plane (832), and the first limiting arc surface (824) is in line contact with the second limiting arc surface (833).

8. The circuit breaker bimetallic performance testing device according to claim 6, characterized in that, The circuit breaker dual-metal performance testing device also includes an elastic reset component (20); One end of the elastic reset member (20) is connected to the first electrode assembly (2), and the other end is connected to the second electrode assembly (3); the first electrode assembly (2) is used to move towards the second electrode assembly (3) under the elastic force of the elastic reset member (20) and the pushing action of the connecting seat (84).

9. The circuit breaker bimetallic performance testing device according to any one of claims 1-8, characterized in that, The circuit breaker (100) is a multi-pole circuit breaker, which includes multiple first terminals (102), multiple second terminals (103), and multiple bimetallic strips (104). The multiple first terminals (102), multiple bimetallic strips (104), and multiple second terminals (103) correspond one-to-one and are electrically connected. The first terminals (102) are provided with a first connection port (1020), and the second terminals (103) are provided with a second connection port (1030). The first electrode assembly (2) includes a plurality of first contacts (21), which are inserted one-to-one into a plurality of first terminals (1020); The second electrode assembly (3) includes a plurality of second contacts (31), which are inserted one-to-one into a plurality of second terminals (1030).

10. The circuit breaker bimetallic performance testing device according to claim 9, characterized in that, The first electrode assembly (2) further includes a first electrode holder (22) and a first cover plate (23); The first electrode holder (22) is provided with a plurality of first mounting slots (221). The first mounting slot (221) has a first mounting opening (2211) on the side facing away from the frame (1) and a first outlet (2212) on the side facing the second electrode assembly (3). The first contact (21) is inserted into the first mounting slot (221) through the first mounting opening (2211) and extends out through the first outlet (2212). The inner wall of the first mounting slot (221) is recessed with a first snap-fit ​​groove (2213). A first elastic member (24) is provided in the first mounting slot (221). The first end of the first elastic member (24) is snapped in the first snap-fit ​​groove (2213), and the second end abuts against the first contact (21). The first cover plate (23) detachably covers the plurality of first mounting slots (221). And / or, The second electrode assembly (3) also includes a second electrode holder (32) and a second cover plate (33); The second electrode holder (32) is provided with a plurality of second mounting slots (321). The second mounting slot (321) has a second mounting port (3211) on the side facing away from the frame (1) and a second outlet (3212) on the side facing the first electrode assembly (2). The second contact (31) is inserted into the second mounting slot (321) through the second mounting port (3211) and extends out through the second outlet (3212). The inner wall of the second mounting slot (321) is recessed with a second snap-fit ​​groove (3213). A second elastic member (34) is provided in the second mounting slot (321). The first end of the second elastic member (34) is snapped in the second snap-fit ​​groove (3213), and the second end abuts against the second contact (31). The second cover plate (33) detachably covers the plurality of second mounting slots (321).

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