Breaker bimetal performance detection device

Abstract

The invention belongs to the technical field of low-voltage apparatus testing, and discloses a circuit breaker bimetal performance detection device, which comprises a rack, a first electrode assembly, a second electrode assembly and a detection assembly, and is characterized in that the first electrode assembly and the second electrode assembly are arranged on the rack in a manner of being relatively close to or away from each other, and a circuit breaker is placed between the first electrode assembly and the second electrode assembly; the first electrode assembly is separably and electrically connected with a first terminal of the circuit breaker, and the second electrode assembly is separably and electrically connected with a second terminal of the circuit breaker; the detection assembly is arranged on the rack, a test window is formed in the shell, and the detection assembly can detect the performance of the bimetallic strip through the test window. The circuit breaker is integrally connected into a power-on loop to be powered on, the motion state of the bimetallic strip under the real working condition of the circuit breaker can be accurately simulated, the bimetallic strip is arranged in the shell of the circuit breaker, the temperature environment where the bimetallic strip works can be accurately simulated, the influence of factors such as temperature on the performance test of the bimetallic strip is eliminated, and the test efficiency is improved. And the accuracy and reliability of test results are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of low-voltage electrical appliance testing, and particularly to a device for detecting the performance of the double metals of a circuit breaker. Background Art

[0002] As a core component inside the circuit breaker, the bimetallic strip plays an overcurrent protection role. Its working principle is that when the circuit breaker is passed through an overcurrent, the bimetallic strip can be heated and bent, generating deformation, thereby driving the connecting rod to cause the mechanism to trip and achieving overcurrent protection. To ensure that the bimetallic strip accurately and reliably performs the overcurrent protection function under various working conditions and avoid safety accidents caused by overcurrent in the electrical system, it is necessary to test the performance of the bimetallic strip to control the quality of the circuit breaker.

[0003] In the prior art, when testing the performance of the bimetallic strip, usually only the bimetallic strip is tested alone, using a fixture to clamp the bimetallic strip and passing current through it, or at most welding the arc ignition plate, flexible connection, bimetallic strip, contact support, contact, connection plate, etc. together and then measuring data. No matter which test method is used, the bimetallic strip is not in the enclosed space inside the circuit breaker housing. During the test, the heat loss of the bimetallic strip is large, and the temperature does not meet the actual application environment, so the influence of the temperature factor on the performance test of the bimetallic strip cannot be eliminated, and there is a large difference between the obtained movement data of the bimetallic strip and the actual working conditions. Moreover, in the prior art, only the performance of a single bimetallic strip can be tested, the test results are relatively single, and the test efficiency is low.

[0004] Therefore, there is an urgent need for a device for detecting the performance of the double metals of a circuit breaker to solve the above problems existing in the prior art. Summary of the Invention

[0005] The purpose of the present invention is to provide a device for detecting the performance of the double metals of a circuit breaker, which can simulate the movement state of the bimetallic strip under the real working conditions of the circuit breaker when testing the performance of the bimetallic strip, eliminate the influence of factors such as temperature on the performance test of the bimetallic strip, and improve the accuracy and reliability of the test results of the bimetallic strip.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] Provide a device for detecting the performance of the double metals of a circuit breaker, including:

[0008] A frame;

[0009] A first electrode assembly and a second electrode assembly are provided on the frame such that they can be relatively close to or far from each other. A circuit breaker is to be placed between the first electrode assembly and the second electrode assembly. The circuit breaker includes a housing, a first terminal and a second terminal provided on the housing and electrically connected, and a bimetal sheet provided inside 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 assembly is provided on the frame. A test window is formed on the housing. The detection assembly, the test window and the bimetal sheet inside the housing are arranged opposite to each other.

[0011] As an alternative of the circuit breaker bimetal performance detection device provided by the present invention, 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 bimetal sheet is fixed inside the housing, the second end of the bimetal sheet can be deformed relative to the first end, and the angle between the bimetal sheet and the horizontal direction is zero or is set as an acute angle relative to the horizontal direction.

[0012] As an alternative of the circuit breaker bimetal performance detection device provided by the present invention, the circuit breaker bimetal performance detection device further includes an adjustment assembly;

[0013] The adjustment assembly includes a moving platform and a fixed seat body. The detection assembly is connected to the moving platform. The fixed seat body is connected to the frame. The moving platform is connected to the fixed seat body in a position-adjustable manner along the extending direction of the bimetal sheet.

[0014] As an alternative of the circuit breaker bimetal performance detection device provided by the present invention, an operation opening is formed on the frame and a fixed bracket is connected. The fixed bracket is located between the first electrode assembly and the detection assembly;

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

[0016] The fixed seat body is connected to a side of the fixed bracket facing away from the first electrode assembly; the fixed block is connected to the fixed seat body, and the movable block is connected to the moving platform; the adjustment member passes through the fixed block and is threadedly connected to the fixed block. The adjustment 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 operation opening; the fastening plate is connected to the fixed seat body and is provided with a strip-shaped hole. The strip-shaped hole extends along the moving direction of the moving platform. The locking member passes through the strip-shaped hole and is threadedly screwed 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 alternative to the circuit breaker double-metal performance detection device provided by the present invention, the detection component includes:

[0019] An installation carrier frame, including a first connection plate, a second connection plate, and a third connection plate. The third connection plate is connected between the first connection plate and the second connection plate, and encloses an installation space with the first connection plate and the second connection plate;

[0020] A plurality of displacement sensors, spaced in the installation space and spaced from the third connection plate;

[0021] An isolation sleeve, passing through the displacement sensors. An isolation boss is provided on the isolation sleeve, and the isolation boss is provided between adjacent displacement sensors;

[0022] A first fastener, passing through and connecting the first connection plate, the isolation sleeve, and the second connection plate.

[0023] As an alternative to the circuit breaker double-metal performance detection device provided by the present invention, the frame is provided with a through hole; the circuit breaker double-metal performance detection device further includes a driving handle, a transmission component, and a guide rod. The transmission component includes a transmission shaft, a first connecting rod, a second connecting rod, and a connecting seat;

[0024] The transmission shaft is rotatably connected to the frame. The driving handle is connected to the transmission shaft and is used to receive an external force to drive the transmission shaft to rotate; the first end of the first connecting rod is fixedly connected to the transmission 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 component; the guide rod is connected to the frame, and a guide sleeve is provided on the first electrode component, and the guide sleeve is slidably sleeved on the guide rod;

[0025] The guide rod and the first electrode component are located on the same side of the frame, and the transmission shaft, the first connecting rod, and the second connecting rod are located on the side of the frame facing away from the guide rod.

[0026] As an alternative to the circuit breaker double-metal performance detection device provided by the present invention, the second end of the first connecting rod is provided with a first hinge plate, and a limiting block protrudes from 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] Two second hinge plates are spaced apart from each other at the first end of the second connecting rod. The first hinge plate is located between the two second hinge plates and is hinged to the second hinge plate by a first hinge shaft. A second limiting plane and a second limiting arc surface located between the two second hinge plates are provided on the second connecting rod. The first limiting arc surface and the second limiting arc surface protrude towards each other.

[0028] The first electrode assembly has a test position. When the first electrode assembly is at the test position, it clamps the circuit breaker together with the second electrode assembly, and 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 alternative to the circuit breaker bimetal performance detection device provided by the present invention, the circuit breaker bimetal performance detection device further includes an elastic reset member.

[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 configured to move in a direction close to the second electrode assembly under the elastic force of the elastic reset member and the pushing action of the connecting seat.

[0031] As an alternative to the circuit breaker bimetal performance detection device provided by the present invention, the circuit breaker is a multi-pole circuit breaker, and the multi-pole circuit breaker includes a plurality of the first connection terminals, a plurality of the second connection terminals, and a plurality of bimetal sheets. The plurality of the first connection terminals, the plurality of bimetal sheets, and the plurality of the second connection terminals are in one-to-one correspondence and are electrically connected. The first connection terminal is provided with a first connection port, and the second connection terminal is provided with a second connection port.

[0032] The first electrode assembly includes a plurality of first contact heads, and the plurality of first contact heads are inserted into the plurality of first connection ports in one-to-one correspondence.

[0033] The second electrode assembly includes a plurality of second contact heads, and the plurality of second contact heads are inserted into the plurality of second connection ports in one-to-one correspondence.

[0034] As an alternative to the circuit breaker bimetal performance detection device provided by the present invention, the first electrode assembly further includes a first electrode seat body and a first cover plate.

[0035] The first electrode base body is provided with a plurality of first mounting grooves. The first mounting grooves are provided with first mounting openings on the side facing away from the frame, and are provided with first lead-out openings on the side facing the second electrode assembly. The first contact is snapped into the first mounting groove through the first mounting opening and extends out through the first lead-out opening. The inner wall of the first mounting groove is recessed with a first clamping groove. A first elastic member is arranged in the first mounting groove. The first end of the first elastic member is clamped in the first clamping groove, and the second end abuts against the first contact. The first cover plate detachably covers the plurality of first mounting grooves;

[0036] and / or,

[0037] The second electrode assembly further includes a second electrode base body and a second cover plate;

[0038] The second electrode base body is provided with a plurality of second mounting grooves. The second mounting grooves are provided with second mounting openings on the side facing away from the frame, and are provided with second lead-out openings on the side facing the first electrode assembly. The second contact is snapped into the second mounting groove through the second mounting opening and extends out through the second lead-out opening. The inner wall of the second mounting groove is recessed with a second clamping groove. A second elastic member is arranged in the second mounting groove. The first end of the second elastic member is clamped in the second clamping groove, and the second end abuts against the second contact. The second cover plate detachably covers the plurality of second mounting grooves.

[0039] Advantages of the present invention:

[0040] The present invention provides a performance detection device for the bimetal of a circuit breaker. When testing the performance of the bimetal, the entire circuit breaker where the bimetal is located is placed between a first electrode assembly and a second electrode assembly. By driving the first electrode assembly and the second electrode assembly to approach each other relatively, the first electrode assembly and the second electrode assembly can jointly clamp the middle circuit breaker. At the same time, 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, so that the first electrode assembly, the first terminal, the bimetal, the second terminal, and the second electrode assembly are electrically connected in sequence to form an energized circuit, enabling the bimetal to conduct current. By opening a test window on the housing of the circuit breaker and making the test window directly opposite to the detection component provided on the frame and the bimetal inside the housing, during the process of passing current through the bimetal, the detection component can detect the performance of the bimetal through the test window, such as the displacement amount, deformation rate, etc. By connecting the entire circuit breaker to the energized circuit to conduct current, the deformation motion state of the bimetal under the real working conditions of the circuit breaker can be accurately simulated. Since the bimetal is placed inside the housing of the circuit breaker, heat loss during the working process will not occur, and the temperature environment where the bimetal is located during operation can be accurately simulated, eliminating the influence of factors such as temperature on the performance test of the bimetal and improving the accuracy and reliability of the test results of the bimetal. Moreover, while clamping and fixing the circuit breaker by the first electrode assembly and the second electrode assembly, the electrical connection between the two electrode assemblies and the corresponding terminals can be achieved, simplifying the wiring process and improving the test efficiency.

[0041] In addition, by connecting the entire circuit breaker to the energized circuit to conduct current, not only can the performance of the bimetal be tested through the detection component, but other detection devices can also be connected to test other performances of the circuit breaker, expanding the application range of this performance detection device for the bimetal of the circuit breaker and making it more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly introduced below. Obviously, the following described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the drawings without creative efforts.

[0043] Figure 1 It is the first view of the performance detection device for the bimetal of the circuit breaker provided by the specific embodiment of the present invention;

[0044] Figure 2 It is the second view of the performance detection device for the bimetal of the circuit breaker provided by the specific embodiment of the present invention;

[0045] Figure 3 It is the first view of the circuit breaker provided by the specific embodiment of the present invention;

[0046] Figure 4 is the second view of the circuit breaker provided by the specific embodiment of the present invention;

[0047] Figure 5 is the third view of the circuit breaker provided by the specific embodiment of the present invention;

[0048] Figure 6 is the first view of the adjustment component provided by the specific embodiment of the present invention;

[0049] Figure 7 is the second view of the adjustment component provided by the specific embodiment of the present invention;

[0050] Figure 8 is the first view of the detection component, adjustment component and fixing bracket provided by the specific embodiment of the present invention;

[0051] Figure 9 is the structural schematic diagram of the detection component provided by the specific embodiment of the present invention;

[0052] Figure 10 is the second view of the detection component, adjustment component and fixing bracket provided by the specific embodiment of the present invention;

[0053] Figure 11 is the exploded schematic diagram of the first electrode assembly and the second electrode assembly provided by the specific embodiment of the present invention;

[0054] Figure 12 is the axonometric drawing of the first electrode assembly and the second electrode assembly provided by the specific embodiment of the present invention.

[0055] Figure 13 is the third view of the circuit breaker double-metal performance detection device provided by the specific embodiment of the present invention;

[0056] Figure 14 is the fourth view of the circuit breaker double-metal performance detection device provided by the specific embodiment of the present invention;

[0057] Figure 15 is the exploded schematic diagram of the driving handle and the transmission component provided by the specific embodiment of the present invention;

[0058] Figure 16 is the structural schematic diagram of the first connecting rod and the second connecting rod provided by the specific embodiment of the present invention;

[0059] Figure 17 is the schematic diagram of the transmission shaft and the first connecting rod provided by the specific embodiment of the present invention;

[0060] Figure 18 is the structural schematic diagram of the connecting seat provided by the specific embodiment of the present invention.

[0061] In the figure:

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

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

[0064] 121. Operation port; 122. Through port; 123. First wire threading port; 124. Second wire threading port; 125. Mounting notch;

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

[0066] 21. First contact; 22. First electrode base body; 23. First cover plate; 24. First elastic member; 25. Second fastener;

[0067] 221. First installation groove;

[0068] 2211. First installation opening; 2212. First lead-out opening; 2213. First clamping groove;

[0069] 31. Second contact; 32. Second electrode base body; 33. Second cover plate; 34. Second elastic member; 35. Third fastener;

[0070] 321. Second installation groove;

[0071] 3211. Second installation opening; 3212. Second lead-out opening; 3213. Second clamping groove;

[0072] 41. Installation carrier; 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 end; 422. Second fixed end; 423. Signal end;

[0075] 431. Isolation boss; 432. Penetrating portion;

[0076] 51. Moving platform; 52. Fixed seat body; 53. Adjusting member; 54. Fixed block; 55. Movable block; 56. Fastening plate; 57. Locking member; 58. Crossed roller guide; 59. Operation interval;

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

[0078] 561. Strip-shaped hole;

[0079] 81. Transmission shaft; 82. First connecting rod; 83. Second connecting rod; 84. Connecting seat; 85. First positioning pin; 86. Flat key; 87. First hinge shaft; 88. Second positioning pin; 89. Second hinge shaft; 810. Third positioning 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. Penetrating plate; 842. Third hinge plate; 843. Fixing plate;

[0083] 871. Limiting groove;

[0084] 100. Circuit breaker;

[0085] 101. Housing; 102. First wiring terminal; 103. Second wiring terminal; 104. Bimetallic strip; 105. Coil; 106. Static 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 mode

[0089] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that for the sake of convenience of description, only parts related to the present invention rather than all structures are shown in the drawings.

[0090] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0091] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under", and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0092] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "left", and "right" are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meanings.

[0093] The term "and / or" in this embodiment is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in the present invention generally represents an "or" relationship between the associated objects before and after.

[0094] In the embodiments of the present invention, the same reference numerals represent the same components, and for the sake of brevity, in different embodiments, the detailed description of the same components is omitted.

[0095] Such as Figure 1 and Figure 2As shown in the figure, this embodiment provides a double-metal performance detection device for a circuit breaker, which includes a frame 1, a first electrode assembly 2, a second electrode assembly 3, and a detection assembly 4. The frame 1 serves as the installation basis for the first electrode assembly 2, the second electrode assembly 3, and the detection assembly 4. Among them, the first electrode assembly 2 and the second electrode assembly 3 are arranged on the frame 1 so as to be relatively close to or far from each other. It can be understood that the first electrode assembly 2 can be fixedly connected to the frame 1, and the second electrode assembly 3 is movably connected to the frame 1. By driving the second electrode assembly 3 to move, the relative approach or separation of the two can be achieved; it can also be that the second electrode assembly 3 is fixedly connected to the frame 1, and the first electrode assembly 2 is movably connected to the frame 1. By driving the first electrode assembly 2 to move, the relative approach or separation of the two can be achieved; it can also be that both the first electrode assembly 2 and the second electrode assembly 3 are movably connected to the frame 1. By driving the two to move relative to the frame 1, the relative approach or separation of the two can be achieved. This embodiment does not make specific limitations.

[0096] A circuit breaker 100 is to be placed between the first electrode assembly 2 and the second electrode assembly 3. Combining Figure 3 、 Figure 4 and Figure 5 , the circuit breaker 100 includes a housing 101, a first terminal 102 and a second terminal 103 that are arranged on the housing 101 and electrically connected, and a bimetallic strip 104 arranged 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 relatively close to clamp and fix the circuit breaker 100, the electrical connection between the two electrode assemblies and the corresponding terminals is realized. The detection assembly 4 is arranged on the frame 1. A test window 1011 is opened on the housing 101, and the detection assembly 4, the test window 1011, and the bimetallic strip 104 inside the housing 101 are arranged opposite to each other.

[0097] The circuit breaker bimetal performance detection device provided in this embodiment, when testing the performance of the bimetal 104, places the entire circuit breaker 100 where the bimetal 104 is located between the first electrode assembly 2 and the second electrode assembly 3, drives the first electrode assembly 2 and the second electrode assembly 3 to approach relatively, can make the first electrode assembly 2 and the second electrode assembly 3 jointly clamp the middle circuit breaker 100, and at the same time electrically connect the first electrode assembly 2 to the first terminal 102 of the circuit breaker 100 and the second electrode assembly 3 to the second terminal 103 of the circuit breaker 100, so that the first electrode assembly 2, the first terminal 102, the bimetal 104, the second terminal 103, and the second electrode assembly 3 are electrically connected in sequence to form an energized circuit, enabling the bimetal 104 to pass an electric current. By opening a test window 1011 on the housing 101 of the circuit breaker 100 and making the test window 1011 directly opposite to the detection component 4 provided on the frame 1 and the bimetal 104 inside the housing 101, during the process of passing an electric current through the bimetal 104, the detection component 4 can detect the performance of the bimetal 104 through the test window 1011, such as the displacement amount, deformation rate, etc. By connecting the entire circuit breaker 100 to the energized circuit to pass an electric current, it can accurately simulate the deformation motion state of the bimetal 104 under the real working conditions of the circuit breaker 100. Since the bimetal 104 is placed inside the housing 101 of the circuit breaker 100, there will be no heat loss during the working process, and it can accurately simulate the temperature environment where the bimetal 104 is located during operation, eliminating the influence of factors such as temperature on the performance test of the bimetal 104, and improving the accuracy and reliability of the test results of the bimetal 104. Moreover, while clamping and fixing the circuit breaker 100 by the first electrode assembly 2 and the second electrode assembly 3, it can achieve the electrical connection between the two electrode assemblies and the corresponding terminals, simplify the wiring process, and improve the test efficiency.

[0098] In addition, by connecting the entire circuit breaker 100 to the energized circuit to pass an electric current, not only can the performance of the bimetal 104 be tested through the detection component 4, but other detection devices can also be connected to test other performances of the circuit breaker 100, expanding the application range of this circuit breaker bimetal performance detection device and making it more practical.

[0099] See Figure 3 、 Figure 4 and Figure 5 As shown in, a first connection port 1020 is provided at the first terminal 102 of the circuit breaker 100. The first electrode assembly 2 can be inserted into the first connection port 1020 to achieve electrical connection with the first terminal 102. A second connection port 1030 is provided at the second terminal 103. The second electrode assembly 3 can be inserted into the second connection port 1030 to achieve electrical connection with the second terminal 103.

[0100] More specifically, the first terminal 102 is provided with a first wiring frame 1021, a first wiring board 1022, and a first wiring screw 1023. The first wiring frame 1021 is fixedly arranged on the housing 101, which defines a first wiring opening 1020. A part of the first wiring board 1022 is inserted into the first wiring frame 1021. The first wiring screw 1023 is threadedly connected to the housing 101, passes through the first wiring frame 1021, and can push against the first wiring board 1022. The lead wire can penetrate into the gap between the first wiring frame 1021 and the first wiring board 1022, and the first wiring board 1022 is tightened against the lead wire by screwing the first wiring screw 1023.

[0101] The second terminal 103 is provided with a second wiring frame 1031, a second wiring board 1032, and a second wiring screw 1033. The second wiring frame 1031 is fixedly arranged on the housing 101, which defines a second wiring opening 1030. A part of the second wiring board 1032 is inserted into the second wiring frame 1031. The second wiring screw 1033 is threadedly connected to the housing 101, passes through the second wiring frame 1031, and can push against the second wiring board 1032. The lead wire can penetrate into the gap between the second wiring frame 1031 and the second wiring board 1032, and the second wiring board 1032 is tightened against the lead wire by screwing the second wiring screw 1033.

[0102] As Figure 4 and Figure 5 shown, the first wiring screw 1023 is located between the test window 1011 and the bimetal 104. When using this device to perform the bimetal performance test, the first wiring screw 1023 can be removed to avoid blocking the test of the bimetal 104 by the detection component 4.

[0103] As Figure 1 and Figure 2 ​As 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 bimetal 104 is fixed inside the housing 101, the second end of the bimetal 104 can deform relative to the first end, and the angle between the bimetal 104 and the horizontal direction is zero or is set as 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 relatively close to each other vertically to clamp the circuit breaker 100, that is, the circuit breaker 100 is clamped and fixed in the up and down direction and is electrically connected to the circuit breaker 100, which conforms to the actual installation form of the circuit breaker 100. Inside the circuit breaker 100 in this form, one end of the bimetal 104 is a fixed end and the other end is a free end, which is equivalent to a cantilever beam structure. In actual working conditions, the bimetal 104 needs to overcome its own gravity. When testing the performance of the bimetal 104 in the prior art, the bimetal 104 is vertically fixed, which does not meet the working condition requirements of overcoming its own gravity. Therefore, there are large deviations in the performance test results of the bimetal 104. In this embodiment, by clamping and fixing the circuit breaker 100 in the up and down direction, the bimetal 104 inside the circuit breaker 100 is in a cantilever beam posture inside the housing 101, meeting the condition of overcoming its own gravity in actual working conditions. Therefore, the influence of the self-gravity of the bimetal 104 on its deformation degree and speed after being energized can be eliminated.

[0104] See Figure 4 and Figure 5 , a coil 105, a static contact 106, a moving contact 107 and a connecting plate 108 are further arranged inside the housing 101 of the circuit breaker 100. The second wiring board 1032, the coil 105, the static contact 106, the moving contact 107, the bimetal 104, the connecting plate 108 and the first wiring board 1022 form the internal circuit of the circuit breaker 100, simulating the circuit where the bimetal 104 is located under real working conditions, making the deformation data of the bimetal 104 more persuasive. Specifically, the first end of the bimetal 104 is fixed to the connecting plate 108, and the second end is a free end, which can be directly or indirectly connected to the tripping mechanism of the circuit breaker 100.

[0105] For ease of description, the X direction, the Y direction and the Z direction are introduced for explanation. Among them, the Z direction is the up and down direction, that is, the height direction of the device, and 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 left and right direction of the device; the Y direction is the front and back direction of the device. The X direction, the Y direction and the Z direction are perpendicular to each other in pairs. As Figure 5 shown, the bimetal 104 is set at an acute angle to the Y direction. In other circuit breakers 100, the bimetal 104 may also be parallel to the Y direction, and at this time the angle with the horizontal direction is zero.

[0106] As Figure 1, Figure 6 and Figure 7 As shown in Figure 5 and , the double-metal performance detection device of the circuit breaker further includes an adjustment component 5 for adjusting the position of the detection component 4. Specifically, the adjustment component 5 includes a moving platform 51 and a fixed seat body 52. The detection component 4 is connected to the moving platform 51, the fixed seat body 52 is connected to the frame 1, and the moving platform 51 is connected to the fixed seat body 52 in a position-adjustable manner along the extension direction of the bimetal 104. Referring to

[0107] , the extension direction of the bimetal 104 is the Y direction, that is, the moving platform 51 is connected to the fixed seat body 52 in a position-adjustable manner along the Y direction. When the moving platform 51 is driven to move along the Y direction on the fixed seat body 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 seat body 52 to measure the bimetal 104. By setting the detection component 4 to be position-adjustable, the deformation data of multiple positions of the bimetal 104 can be measured along the Y direction, making the test result of the bimetal 104 more reliable and accurate.

[0107] Specifically, referring to Figure 12 , an operation opening 121 is formed on the frame 1. Combining 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 component 2 and the detection component 4 and is used to install the adjustment component 5. The adjustment component 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 seat body 52 is connected to the side of the fixed bracket 6 facing away from the first electrode component 2; the fixed block 54 is connected to the fixed seat body 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 thrust end 531 and an operation end 532 respectively disposed on both sides of the fixed block 54. The thrust end 531 abuts against the movable block 55, and the operation end 532 passes through the operation opening 121. The fastening plate 56 is connected to the fixed seat body 52 and is provided with a strip-shaped hole 561. The strip-shaped hole 561 extends along the moving direction of the moving platform 51, and the locking member 57 passes through the strip-shaped hole 561 and is threadedly screwed onto the moving platform 51.

[0108] ​​​​​​​​Before adjusting the detection component 4, loosen the locking member 57 to release the locking between the moving platform 51 and the fixed seat body 52. When the operating end 532 of the adjusting member 53 is screwed, the entire adjusting member 53 can be driven to rotate threadedly on the fixed block 54, thereby realizing the axial movement of the adjusting member 53 (moving along the Y direction). When the pushing end 531 of the adjusting member 53 pushes 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 seat body 52. During the sliding process, the strip-shaped hole 561 on the fastening plate 56 slides in cooperation with the locking member 57. When the detection component 4 moves to a suitable measurement position, tighten the locking member 57 to lock and fix the moving platform 51 and the fixed seat body 52, ensuring the detection stability of the detection component 4. In this embodiment, by providing an operation port 121 on the frame 1 for passing through the operating end 532 of the adjusting member 53, the tester can operate and drive the detection component 4 to move on the side of the frame 1 facing away from the circuit breaker 100, with a larger operation space and more convenient adjustment. Further, referring to Figure 2 , there is an operation interval 59 between the detection component 4 and the first electrode assembly 2, and the locking member 57 is located within this operation interval 59. The setting of this operation interval 59 reserves sufficient operation space for screwing the locking member 57, facilitating the tester to screw the locking member 57 to quickly fix the position of the detection component 4.

[0109] By providing the fixed bracket 6, the entire adjusting component 5 can be first fixed on the fixed bracket 6 and then integrally fixed on the frame 1 through fasteners such as screws, making the assembly more convenient.

[0110] Further, a crossed roller guide 58 is provided between the moving platform 51 and the fixed seat body 52 to achieve smooth sliding between the two, and can ensure the moving accuracy of the detection component 4 and avoid moving deviation.

[0111] Exemplarily, the adjusting member 53 is a micrometer head, which can precisely control the displacement amount during screwing, thereby precisely controlling the displacement amount of the detection component 4 and enabling the detection component 4 to accurately reach each test position of the bimetal 104. For example, the accuracy of this micrometer head is 0.01 mm. By rotating the micrometer head, the crossed roller guide 58 drives the moving platform 51 to achieve a moving stroke of ±6 mm in the front-rear direction (Y direction). When the measured position is reached, the moving platform 51 can be fixed by the locking member 57, and then the data of the bimetal 104 at this position can be measured.

[0112] Exemplarily, the locking member 57 is a locking screw.

[0113] In this embodiment, the measured circuit breaker 100 can be a single-pole circuit breaker or a multi-pole circuit breaker. Specifically, Figure 1In it, the circuit breaker 100 is a multi-pole circuit breaker. The multi-pole circuit breaker includes a plurality of first connection terminals 102, a plurality of second connection terminals 103, and a plurality of bimetal strips 104. The plurality of first connection terminals 102, the plurality of bimetal strips 104, and the plurality of second connection terminals 103 correspond to each other one by one and are electrically connected. Each of the plurality of first connection terminals 102 is provided with a first connection port 1020, and each of the plurality of second connection terminals 103 is provided with a second connection port 1030. Refer to Figure 11 and Figure 12 , the first electrode assembly 2 includes a plurality of first contacts 21, and the plurality of first contacts 21 can be inserted into the plurality of first connection ports 1020 in a one-to-one correspondence; the second electrode assembly 3 includes a plurality of second contacts 31, and the plurality of second contacts 31 can be inserted into the plurality of second connection ports 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 energized circuit, so as to measure the deformation data of each bimetal strip 104 in the multi-pole circuit breaker through the detection assembly 4.

[0114] Of course, this device can also measure a single-pole circuit breaker. Place the single-pole circuit breaker between the first electrode assembly 2 and the second electrode assembly 3, use a corresponding set of first contacts 21 and second contacts 31 to clamp the single-pole circuit breaker, and connect it to the energized circuit, then the deformation of the bimetal strip 104 under real working conditions can be simulated, and data can be obtained through the detection assembly 4.

[0115] Refer to Figure 11 and Figure 12 , the first electrode assembly 2 further includes a first electrode seat body 22 and a first cover plate 23. The first electrode seat body 22 is provided with a plurality of first installation grooves 221, and the plurality of first installation grooves 221 correspond to the plurality of first contacts 21 one by one. The first installation groove 221 is provided with a first installation port 2211 on the side facing away from the frame 1, and a first lead-out port 2212 on the side facing the second electrode assembly 3. The first contact 21 is snapped into the first installation groove 221 through the first installation port 2211 and extends out through the first lead-out port 2212 so as to be inserted into the first connection port 1020 of the circuit breaker 100. The inner wall of the first installation groove 221 is recessed with a first clamping groove 2213, and a first elastic member 24 is arranged in each first installation groove 221. The first end of the first elastic member 24 is clamped in the first clamping groove 2213, so as to fix the position of the first elastic member 24 in the first installation groove 221, and the second end of the first elastic member 24 abuts against the first contact 21. The first cover plate 23 removably covers the plurality of first installation grooves 221.

[0116] By providing the first mounting opening 2211, it is convenient for the first elastic member 24 and the first contact 21 to be inserted into the first mounting groove 221 through the first mounting opening 2211. After the first contacts 21 and the first elastic members 24 are installed, the first cover plate 23 is placed over the plurality of first mounting grooves 221, and the first cover plate 23 is detachably connected to the first electrode base body 22 by using the second fastener 25. Subsequently, if the first contacts 21 and the first elastic members 24 are damaged, they can be easily replaced.

[0117] Exemplarily, the first elastic member 24 is a conical spring with a larger diameter at its upper end, which can be clamped in the first clamping groove 2213, and its lower end abuts against the first contact 21. The second fastener 25 can be a screw.

[0118] Continue to refer to Figure 11 and Figure 12 As shown in, the second electrode assembly 3 further includes a second electrode base body 32 and a second cover plate 33. The second electrode base body 32 is provided with a plurality of second mounting grooves 321, and the plurality of second mounting grooves 321 correspond to the plurality of second contacts 31 one by one. The second mounting groove 321 is provided with a second mounting opening 3211 on the side facing away from the frame 1, and a second lead-out opening 3212 on the side facing the first electrode assembly 2. The second contact 31 is snapped into the second mounting groove 321 through the second mounting opening 3211 and extends out through the second lead-out opening 3212 so as 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 clamping groove 3213, and a second elastic member 34 is arranged in the second mounting groove 321. The first end of the second elastic member 34 is clamped in the second clamping groove 3213, so as to fix 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 detachably seals the plurality of second mounting grooves 321.

[0119] By providing the second mounting opening 3211, it is convenient for the second elastic member 34 and the second contact 31 to be inserted into the second mounting groove 321 through the second mounting opening 3211. After the second contacts 31 and the second elastic members 34 are installed, the second cover plate 33 is placed over the plurality of second mounting grooves 321, and the second cover plate 33 is detachably connected to the second electrode base body 32 by using the third fastener 35. Subsequently, if the second contacts 31 and the second elastic members 34 are damaged, they can be easily replaced.

[0120] Exemplarily, the second elastic member 34 is a conical spring with a larger diameter at its lower end, which can be clamped in the second clamping 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 member 24 and the second elastic member 34 are telescopable along 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 and down direction, the first elastic member 24 and the second elastic member 34 are compressed along the Z direction, so that the first contact 21 and the second contact 31 are pressed tightly in the first connection port 1020 and the second connection port 1030 under the action of the corresponding elastic members, so that the first contact 21 and the first wiring board 1022 have sufficient contact area, and the second contact 31 and the second wiring board 1032 have sufficient contact area, ensuring stable and good contact, reducing the contact resistance, and improving the power-on reliability.

[0122] It should be noted that interference fits exist between the first contact 21 and the first connection port 1020, and between the second contact 31 and the second connection port 1030.

[0123] In this embodiment, referring to Figure 1 、 Figure 8 、 Figure 9 and Figure 10 , the detection assembly 4 includes a mounting carrier 41, a displacement sensor 42, an isolation sleeve 43 and a first fastener 44. Among them, the mounting carrier 41 includes a first connecting plate 411, a second connecting plate 412 and a third connecting plate 413. The first connecting plate 411 and the second connecting plate 412 are spaced along the X direction. The third connecting plate 413 is connected between the first connecting plate 411 and the second connecting plate 412, and encloses an installation space 414 with the first connecting plate 411 and the second connecting plate 412. A plurality of displacement sensors 42 are arranged along the X direction. When the product to be measured is a multi-pole circuit breaker, each pole of the circuit breaker 100 is provided with a corresponding test window 1011. A plurality of displacement sensors 42 and a plurality of bimetallic strips 104 are directly opposite to each other through a plurality of test windows 1011, so that each bimetallic strip 104 can be measured by a displacement sensor 42. A plurality of displacement sensors 42 are spaced in the installation space 414 of the mounting carrier 41 and are spaced from the third connecting plate 413. The third connecting plate 413 is fixedly connected to the moving platform 51 through a fourth fastener 46. The fourth fastener 46 is exemplarily a screw, and the screw passes through the third connecting plate 413 and is threadedly connected to the moving platform 51. The space between the displacement sensor 42 and the third connecting plate 413 is used to make way for the head of the screw to avoid interference between the displacement sensor 42 and the screw. The isolation sleeve 43 is sleeved on the displacement sensor 42. An isolation boss 431 is provided on the isolation sleeve 43. The isolation boss 431 is arranged between adjacent displacement sensors 42 to separate adjacent displacement sensors 42, ensuring that there is a gap between the displacement sensors 42, which is beneficial to the heat dissipation of the displacement sensors 42 and can avoid problems such as short circuits between each other. 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 a plurality of displacement sensors 42 on the mounting carrier 41.

[0124] More specifically, refer to Figure 10 , the isolation sleeve 43 includes a penetrating portion 432 which is hollow inside and penetrates through the displacement sensor 42. The isolation boss 431 is provided on the penetrating portion 432 in a ring shape. The adjacent displacement sensors 42 are separated by an isolation sleeve 43, so that there is a gap between the displacement sensors 42.

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

[0126] Refer to Figure 9 , the displacement sensor 42 has a first fixed end 421 and a second fixed end 422 which are diagonally arranged. The isolation sleeve 43 is penetrated through both the first fixed end 421 and the second fixed end 422, so that the positioning between multiple displacement sensors 42 is stable. At the same time, there are two first fasteners 44, which respectively pass through the multiple isolation sleeves 43 at the positions of the first fixed end 421 and the second fixed end 422 and are locked and fixed with the corresponding first nuts 45. By the way of diagonally positioning and fixing multiple displacement sensors 42, on the premise of saving the quantity of the isolation sleeves 43 and the first fasteners 44, it can ensure a better positioning and fixing effect.

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

[0128] Exemplarily, the displacement sensor 42 is a laser displacement sensor which can emit laser to the bimetallic strip 104. Combined with the data processing module which is communicatively 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, and can intuitively present data such as the displacement amount, bending rate, stability of the bimetallic strip 104, and whether there is a springback phenomenon.

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

[0130] In this embodiment, as Figure 13 and Figure 14As shown, the double-metal performance detection device of the circuit breaker further includes a driving handle 7, a transmission assembly 8, and a guide rod 9. The driving handle 7 drives the first electrode assembly 2 to move in the Z direction through the transmission assembly 8 to approach or move away from the second electrode assembly 3. Among them, the transmission assembly 8 includes a transmission shaft 81, a first connecting rod 82, a second connecting rod 83, and a connecting seat 84. The transmission shaft 81 is rotatably connected to the frame 1, and the driving handle 7 is connected to the transmission shaft 81 for receiving an external force to drive the transmission shaft 81 to rotate; the first end of the first connecting rod 82 is fixedly connected to the transmission 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 hole 122, and the connecting seat 84 passes through the through hole 122 and is connected to the first electrode seat body 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, and the guide sleeve 10 is slidably sleeved on the guide rod 9.

[0131] The first connecting rod 82, the second connecting rod 83, and the connecting seat 84 form a crank-slider mechanism. When the transmission shaft 81 is driven by the driving handle 7 to drive the first connecting rod 82 to rotate, the first connecting rod 82 drives the connecting seat 84 to move in the Z direction through the second connecting rod 83, and the connecting seat 84 further 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 and improve the movement accuracy and stability. Exemplarily, 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 arranged on the same side of the frame 1, and the transmission 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, that is, arranged on the back of the frame 1, so that there is enough space on the front of the frame 1 to arrange the detection assembly 4 and the adjustment assembly 5, making the layout of each component on the frame 1 more reasonable. 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 taken and placed.

[0134] As Figure 11 and Figure 13 shown, at this time the first electrode assembly 2 is in the non-test position, as Figure 2 and Figure 14As shown in the figure, after the driving handle 7 is lifted, the connecting seat 84 pushes the first electrode assembly 2 downward to the test position, and jointly clamps the circuit breaker 100 with the second electrode assembly 3. Then, the bimetallic strip 104 inside the housing 101 of the circuit breaker 100 can be measured by the displacement sensor 42.

[0135] As Figure 16 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; a first limiting plane 823 is arranged on the limiting block 822, and a first limiting arc surface 824 is arranged on the first hinge plate 821. Two second hinge plates 831 are arranged at intervals at the first end of the second connecting rod 83. The first hinge plate 821 is located between the two second hinge plates 831 and is hinged to the second hinge plate 831 through a first hinge shaft 87. A second limiting plane 832 and a second limiting arc surface 833 located between the two second hinge plates 831 are arranged on the second connecting rod 83. The first limiting arc surface 824 and the second limiting arc surface 833 protrude towards each other. When the first electrode assembly 2 moves downward to the test position driven by the driving handle 7 and the transmission assembly 8, the first electrode assembly 2 and the second electrode assembly 3 jointly 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 is in line contact with the second limiting arc surface 833, as Figure 14 shown in the state. After the first limiting plane 823 and the second limiting plane 832 abut, the first connecting rod 82 and the second connecting rod 83 can no longer move relative to each other, and the first connecting rod 82 and the second connecting rod 83 can be restricted to a collinear state with each other. At the same time, the line contact between the first limiting arc surface 824 and the second limiting arc surface 833 can realize the self-locking of the transmission assembly 8, so that the first electrode assembly 2 is stable at the test position and will not move easily. Only when the tester lifts the driving handle 7 can the self-locking effect be released, and the first connecting rod 82 and the second connecting rod 83 move back to the Figure 13 state shown.

[0136] Refer to Figure 13 、 Figure 14 and Figure 15 , one end of the driving handle 7 is sleeved on the transmission shaft 81, and the first positioning pin 85 passes through the driving handle 7 and is arranged on the transmission shaft 81, so that the driving handle 7 is circumferentially limited to the transmission shaft 81, and the driving handle 7 drives the transmission shaft 81 to rotate. Further, two first bearings 820 are arranged at intervals on the frame 1, and both ends of the transmission shaft 81 are inserted into the inner holes of the two first bearings 820, so that the transmission shaft 81 is rotatably installed on the frame 1 through the first bearings 820, reducing the rotational resistance of the transmission shaft 81.

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

[0138] A second bearing 830 is provided at the second end of the first connecting rod 82. The first hinge shaft 87 passes through the inner hole of the second bearing 830, and both ends of the first hinge shaft 87 are respectively inserted into two second hinge plates 831 of the second connecting rod 83. Second positioning pins 88 are inserted through both of the two second hinge plates 831, and the second positioning pins 88 limit the installation position of the first hinge shaft 87. Specifically, referring to Figure 17 , limit grooves 871 are provided at both ends of the first hinge shaft 87, and the second positioning pins 88 on the two second hinge plates 831 are clamped in the corresponding limit grooves 871 to block 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. The inner hole of the third bearing 840 is provided with a second hinge shaft 89, and both ends of the second hinge shaft 89 are installed 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 to reduce the transmission resistance. Combining Figure 18 , the connecting seat 84 includes two third hinge plates 842 arranged at intervals. The second end of the second connecting rod 83 is arranged between the two third hinge plates 842. Both ends of the second hinge shaft 89 are inserted into the two third hinge plates 842 and fixed by a third positioning pin 810. Specifically, similar to the first hinge shaft 87, limit grooves 871 are also provided on the second hinge shaft 89. Third positioning pins 810 are inserted through both of the two third hinge plates 842, and the third positioning pins 810 are clamped in the limit grooves 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] Referring to Figure 18 , the connecting seat 84 further includes a penetrating plate 841 and a fixing plate 843. The two third hinge plates 842 protrude from the penetrating plate 841, and the fixing plate 843 is arranged at one end of the penetrating plate 841 away from the third hinge plate 842. The penetrating plate 841 penetrates through the through hole 122 on the frame 1, and the fixing plate 843 is fixedly connected to the first electrode seat body 22 of the first electrode assembly 2 through fasteners such as screws.

[0141] Referring to Figure 1 and Figure 2, the double-metal performance detection device of the circuit breaker further 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 configured to move in a direction approaching the second electrode assembly 3 under the elastic force of the elastic reset member 20 and the pushing force of the connecting seat 84. When the driving handle 7 is lifted to drive the first electrode assembly 2 to move downward through the transmission assembly 8, the elastic reset member 20 can release elastic potential energy and provide a certain resilience to enable the first electrode assembly 2 to quickly reach the test position, which can reduce the force applied by lifting the driving handle 7 and make the test process more labor-saving. It can be understood that when the driving handle 7 is rotated downward, the first electrode assembly 2 moves upward, driving the elastic reset member 20 to be stretched.

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

[0143] Further, referring to Figure 1 , first hook members 30 are provided at both ends of the first electrode seat body 22 along the X direction, and second hook members 40 are provided at both ends of the second electrode seat body 32 along the X direction. An elastic reset member 20 is connected between the first hook members 30 and the second hook members 40 at both ends respectively, so that the first electrode assembly 2 is balanced in force during movement and can provide a greater resilience to enable the first electrode assembly 2 to quickly clamp the circuit breaker 100.

[0144] As Figure 13 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 provided 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 therebetween, and is exemplarily provided in multiple numbers (such as two, etc.).

[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 to avoid occupying the space on the front side of the support plate 12. The support plate 12 is also provided with a first wire passing port 123 facing the first electrode assembly 2 and a second wire passing port 124 facing the second electrode assembly 3, and the first wire passing port 123 is provided above the second wire passing port 124. A first wire passing hole communicating with the first installation groove 221 is provided on the first electrode seat body 22. A wiring screw is exemplarily connected to the first contact 21. The wiring screw passes through the first wire passing hole and the first wire passing port 123 and is connected to an external lead. A second wire passing hole communicating with the second installation groove 321 is provided on the second electrode seat body 32. A wiring screw is exemplarily connected to the second contact 31. The wiring screw passes through the second wire passing hole and the second wire passing port 124 and is connected to an external lead. The wiring method behind the support plate 12 can reasonably utilize the space on its back side and make the layout of the entire device more reasonable.

[0146] Further, referring to Figure 1 , Figure 13 and Figure 14 , the frame 1 further includes a mounting block 14. An installation notch 125 is provided at the upper end of the support plate 12. The mounting block 14 is clamped at the installation notch 125, and the installation stability is high. Two support lugs 141 protrude from one side of the mounting block 14, and a first bearing 820 is installed on each support lug 141 to provide an installation basis for the transmission shaft 81. Two extension blocks 142 are provided on the other side of the mounting block 14. The two extension blocks 142 are arranged in the X direction and extend away from each other. The guide rod 9 is passed through the extension blocks 142, and the extension blocks 142 are fixedly connected to the support plate 12 by fasteners such as screws. An avoidance notch 143 is provided on the mounting block 14 between the two extension blocks 142. The avoidance notch 143 is used to avoid the space for installing the detection assembly 4, making the structural layout more compact and reasonable.

[0147] The use process of the circuit breaker bimetal performance detection device provided in this embodiment is roughly as follows:

[0148] Before the test, the first electrode assembly 2 is in a non-test position away from the second electrode assembly 3, and the space between the two can place the circuit breaker 100, as Figure 1 shown. During the test, the circuit breaker 100 where the bimetal 104 to be tested is located is placed between the first electrode assembly 2 and the second electrode assembly 3, and the second connection port 1030 of the circuit breaker 100 is inserted into the second contact 31 of the second electrode assembly 3. Then, the driving handle 7 is lifted upwards. The driving handle 7 drives the transmission shaft 81 to rotate. The transmission shaft 81 then pushes the first electrode assembly 2 to move down to the test position through 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 connection port 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 up and down direction, and the circuit breaker 100 is connected to the energized circuit. Moreover, the first contact 21 and the second contact 31 are elastically in contact with the corresponding terminal under the elastic force of the first elastic member 24 and the second elastic member 34 respectively, ensuring that there is enough contact area with the corresponding wiring board and improving the reliability of the circuit breaker 100 being energized. After the circuit breaker 100 is connected to the energized circuit, the displacement sensor 42 of the detection assembly 4 can detect the deformation data of the bimetal 104 in the housing 101 of the circuit breaker 100 through the test window 1011. By rotating the adjusting member 53 of the adjusting assembly 5, the position of the displacement sensor 42 can be adjusted to realize the multi-point position detection of the bimetal 104, and the obtained deformation data of the bimetal 104 is more reliable and accurate.

[0149] In summary, when using this device to detect the performance of the bimetal strip 104, it can simulate the motion state of the bimetal strip 104 under the real working conditions of the circuit breaker 100. The environment where the bimetal strip 104 is located is the environment under the real working conditions, and it forms a circuit with components such as the coil 105, the static contact 106, and the moving contact 107, making the circuit it is in the circuit under the real working conditions. During the test, the two electrode assemblies clamp the circuit breaker 100 up and down, making the bimetal strip 104 in the cantilever beam form, meeting the condition of overcoming its own gravity, realizing the simulation of the real working conditions, eliminating the influence of temperature and the self-weight of the bimetal strip 104 on the test results, being able to obtain the motion data of the bimetal strip 104 under the actual working conditions, and the data being reliable and accurate, having strong referenceability, and being conducive to controlling the quality performance of the circuit breaker 100.

[0150] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A double-metal performance detection device for a circuit breaker, characterized in that, Comprising: A frame (1); A first electrode assembly (2) and a second electrode assembly (3), which are arranged on the frame (1) so as to be relatively close to or far from each other. A circuit breaker (100) is to be 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) which are arranged on the housing (101) and electrically connected, and a bimetallic strip (104) arranged 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); A detection assembly (4), which is arranged on the frame (1). A test window (1011) is formed in the housing (101). The detection assembly (4), the test window (1011) and the bimetallic strip (104) in the housing (101) are arranged opposite to each other.

2. The circuit breaker double gold performance detection 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 in the housing (101), and the second end of the bimetallic strip (104) can deform relative to the first end. The included angle between the bimetallic strip (104) and the horizontal direction is zero or an acute angle relative to the horizontal direction.

3. The double-metal performance detection device for a circuit breaker according to claim 1, characterized in that, The circuit breaker bimetal performance detection device further includes an adjustment assembly (5); The adjustment assembly (5) includes a moving platform (51) and a fixed seat body (52). The detection assembly (4) is connected to the moving platform (51), the fixed seat body (52) is connected to the frame (1), and the moving platform (51) is connected to the fixed seat body (52) in a position-adjustable manner along the extension direction of the bimetallic strip (104).

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

5. The circuit breaker double gold performance detection device according to claim 1, characterized in that, The detection assembly (4) includes: An installation carrier (41), including a first connecting plate (411), a second connecting plate (412), and a third connecting plate (413). The third connecting plate (413) is connected between the first connecting plate (411) and the second connecting plate (412), and encloses an installation space (414) with the first connecting plate (411) and the second connecting plate (412); A plurality of displacement sensors (42), spaced in the installation space (414) and spaced from the third connecting plate (413); An isolation sleeve (43), passing through the displacement sensors (42). An isolation boss (431) is provided on the isolation sleeve (43), and the isolation boss (431) is disposed between adjacent displacement sensors (42); A first fastener (44), passing through and connecting the first connecting plate (411), the isolation sleeve (43), and the second connecting plate (412).

6. The circuit breaker double gold performance detection device according to claim 1, characterized in that, The frame (1) is provided with a through hole (122); the circuit breaker bimetal performance detection device further includes a driving handle (7), a transmission assembly (8), and a guide rod (9). The transmission assembly (8) includes a transmission shaft (81), a first connecting rod (82), a second connecting rod (83), and a connecting seat (84); The transmission shaft (81) is rotatably connected to the frame (1), and the driving handle (7) is connected to the transmission shaft (81) for receiving an external force to drive the transmission shaft (81) to rotate; the first end of the first connecting rod (82) is fixedly connected to the transmission 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) penetrates through the through hole (122) and is connected to the first electrode assembly (2); the guide rod (9) is connected to the frame (1), a guide sleeve (10) is arranged on the first electrode assembly (2), and the guide sleeve (10) is slidably sleeved on the guide rod (9). The guide rod (9) and the first electrode assembly (2) are arranged on the same side of the frame (1), and the transmission 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).

7. The circuit breaker double gold performance detection device according to claim 6, characterized in that, A first hinge plate (821) is arranged at the second end of the first connecting rod (82), and a limiting block (822) protrudes from the first hinge plate (821); a first limiting plane (823) is arranged on the limiting block (822), and a first limiting arc surface (824) is arranged on the first hinge plate (821). Two second hinge plates (831) are arranged at intervals at the first end of the second connecting rod (83), the first hinge plate (821) is located between the two second hinge plates (831) and is hinged to the second hinge plate (831) through a first hinge shaft (87); a second limiting plane (832) and a second limiting arc surface (833) located between the two second hinge plates (831) are arranged on the second connecting rod (83); the first limiting arc surface (824) and the second limiting arc surface (833) protrude towards each other. The first electrode assembly (2) has a test position. When the first electrode assembly (2) is in the test position, it clamps the circuit breaker (100) together with the second electrode assembly (3), and 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 double gold performance detection device according to claim 6, characterized in that, The circuit breaker bimetal performance detection device further includes an elastic resetting member (20). One end of the elastic resetting 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 direction close to the second electrode assembly (3) under the elastic force of the elastic resetting member (20) and the pushing action of the connecting seat (84).

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

10. The circuit breaker double gold performance detection device according to claim 9, characterized in that, The first electrode assembly (2) further includes a first electrode base body (22) and a first cover plate (23). The first electrode base body (22) is provided with a plurality of first installation grooves (221). The first installation groove (221) is provided with a first installation opening (2211) on the side facing away from the frame (1), and a first lead-out opening (2212) on the side facing the second electrode assembly (3). The first contact (21) is snapped into the first installation groove (221) through the first installation opening (2211) and extends out through the first lead-out opening (2212). The inner wall of the first installation groove (221) is recessed with a first clamping groove (2213). A first elastic member (24) is arranged in the first installation groove (221). The first end of the first elastic member (24) is clamped in the first clamping groove (2213), and the second end abuts against the first contact (21). The first cover plate (23) detachably covers the plurality of the first installation grooves (221). and / or The second electrode assembly (3) further includes a second electrode base body (32) and a second cover plate (33). The second electrode base body (32) is provided with a plurality of second installation grooves (321). The second installation groove (321) is provided with a second installation opening (3211) on the side facing away from the frame (1), and a second lead-out opening (3212) on the side facing the first electrode assembly (2). The second contact (31) is snapped into the second installation groove (321) through the second installation opening (3211) and extends out through the second lead-out opening (3212). The inner wall of the second installation groove (321) is recessed with a second clamping groove (3213). A second elastic member (34) is arranged in the second installation groove (321). The first end of the second elastic member (34) is clamped in the second clamping groove (3213), and the second end abuts against the second contact (31). The second cover plate (33) detachably covers the plurality of the second installation grooves (321).

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