A mechanical life test device for molded case circuit breaker

Abstract

This invention provides a mechanical life testing device for molded case circuit breakers applied in the field of structural testing. The device includes a frame with a clamp for holding the circuit breaker. A static testing mechanism is also provided on the frame, comprising a static testing bracket fixed to the frame and a static rotary cylinder fixed to the bracket. A testing ring is fixed to the output end of the static rotary cylinder. The bottom of the testing ring has two symmetrically arranged passage notches, and two sets of rotationally symmetrical claws are fixed inside the testing ring. This invention, through a clamp with a connecting joint and a frame with an energized testing mechanism, a static testing mechanism, a dynamic testing mechanism, and loading / unloading stations, can comprehensively test the opening and closing mechanical life and energized life of the circuit breaker under both static and dynamic conditions. This effectively improves testing safety and efficiency, has market potential, and is suitable for widespread application.

Description

Technical Field

[0001] The present application relates to the field of structural detection, and in particular to a mechanical life test device for a molded case circuit breaker. Background Art

[0002] A molded case circuit breaker is a protective device used in power systems. When a circuit fault occurs (such as leakage, short circuit, overload, etc.), it can automatically cut off the current to protect the safe operation of the circuit and equipment.

[0003] During the production process of molded case circuit breakers, in order to verify product quality, evaluate mechanical properties or discover potential problems, mechanical life tests are required to evaluate their mechanical properties and reliability after multiple operations.

[0004] Mechanical life refers to the number of no-load operations (i.e., not connecting or disconnecting current) that a circuit breaker can withstand. Through mechanical life testing, we can understand the wear, fatigue, and deformation of the circuit breaker's operating mechanism, contact system, springs and other mechanical parts after multiple opening and closing operations.

[0005] The traditional test device adopts a combination of ball screw and linear guide to convert the rotational motion of the motor into a linear reciprocating motion push-and-close simulation mechanism. The structure is complex, the push-and-close stroke is long, and the test efficiency is low. Therefore, a mechanical life test device for molded case circuit breakers is proposed. Summary of the invention

[0006] The purpose of the present application is to solve the technical problems of the existing test device with complex structure, long push-in stroke and low test efficiency. Compared with the existing technology, a molded case circuit breaker mechanical life test device is provided, including a frame, a clamp for clamping the circuit breaker is provided on the frame, and a static detection mechanism is also provided on the frame. The static detection mechanism includes a static detection bracket fixed on the frame, and a static rotating cylinder is also fixed on the static detection bracket. A detection ring is fixed on the output end of the static rotating cylinder;

[0007] The bottom of the detection ring is provided with two groups of symmetrically arranged passage notches, and two groups of rotationally symmetrical pushing claws are fixed inside the detection ring.

[0008] Furthermore, the circuit breaker is provided with a switch handle, the spacing between the two sets of passage notches at the bottom of the detection ring is smaller than the maximum stroke spacing of the switch handle, the distance between the push claw and the inner diameter of the detection ring is greater than half of the maximum stroke of the switch handle, and the inner side of the push claw is arc-shaped.

[0009] Furthermore, a rotating disk is provided on the frame, and the four groups of clamps are evenly fixed on the rotating disk at equal angles. The frame is also provided with a power-on detection mechanism, a dynamic detection mechanism, and loading and unloading stations. The power-on detection mechanism, static detection mechanism, dynamic detection mechanism, and loading and unloading stations are evenly arranged along the circumferential side of the rotating disk at equal angles.

[0010] Further, the clamp includes a fixed base, the rotating disk is provided with an assembly groove matching the fixed base, the fixed base is fixed in the assembly groove, the top of the fixed base is provided with an execution seat, the bottom of the execution seat is fixed with a spline shaft, the fixed base is provided with a spline groove corresponding to the spline shaft, the bottom end of the spline shaft extends through the spline groove and is fixed with a docking head, and a reset spring is also clamped between the docking head and the fixed base;

[0011] Four positioning pins arranged opposite to each other are fixed on the top of the actuator seat, positioning holes corresponding to the positioning pins are arranged at the bottom of the circuit breaker, both ends of the actuator seat are rotatably connected to a flip bracket through a rotating shaft, a plurality of conductive voltage blocks are arranged on the top of the flip bracket, and wiring inlet and outlet terminals corresponding to the conductive voltage blocks are arranged on the circuit breaker;

[0012] A supporting seat is also provided on the top of the actuator seat, a silicone pad is fixed on the top of the supporting seat, a sliding sleeve corresponding to the positioning pin is provided on the supporting seat, and a material withdrawal spring is clamped between the supporting seat and the actuator seat;

[0013] Flipping force arms are symmetrically fixed on both sides of the flip bracket, a driving roller is fixed on one end of the flipping force arm away from the conductive voltage block, and a driving groove corresponding to the material withdrawal spring is provided on one side of the bottom of the supporting seat;

[0014] The fixed base is provided with relative and vertically arranged limiting slide rails, and the opposite sides of the flip bracket are provided with limiting slide grooves matching the limiting slide rails.

[0015] Furthermore, a positioning arc groove is provided at the bottom of the docking joint, two groups of conductive arc grooves are symmetrically arranged on both sides of the positioning arc groove, a power supply mechanism matching the docking joint is provided at the top of the frame, and a conductive arc rail corresponding to the conductive arc groove and a T-pin corresponding to the positioning arc groove are provided at the top of the power supply mechanism.

[0016] Furthermore, the positioning arc groove and the conductive arc groove are both arranged concentrically with the rotating disk.

[0017] Furthermore, the frame is provided with power supply mechanisms at the bottom of the power-on detection mechanism, the static detection mechanism and the dynamic detection mechanism, wherein the power supply mechanisms of the power-on detection mechanism and the static detection mechanism are fixedly connected to the frame.

[0018] Further, the dynamic detection mechanism comprises a dynamic detection bracket, a telescopic cylinder is fixed on the dynamic detection bracket, a dynamic rotating cylinder is fixed on the output end of the telescopic cylinder, and the detection ring is fixed on the output end of the dynamic rotating cylinder;

[0019] A linkage bracket is also fixed to the output end of the telescopic cylinder. The power supply mechanism at the bottom of the dynamic detection mechanism is slidably connected to the frame in the vertical direction. The linkage bracket is fixedly connected to the bottom of the power supply mechanism. A tensioning spring is clamped between the power supply mechanism and the rotating disk. A limit block is also provided on the rotating disk to limit the upward movement height of the power supply mechanism.

[0020] Furthermore, the loading and unloading station includes an XZ axis linear module, a pneumatic clamp is fixed to the output end of the XZ axis linear module, and a top column is fixed to the bottom of the loading and unloading station on the frame, and the top column matches the positioning arc groove of the fixture.

[0021] Furthermore, the rack is also provided with a control unit, and the conductive arc tracks of the power supply mechanism are all powered by the control unit, and the control unit is also connected to a current sensor and a voltage sensor.

[0022] Compared with the prior art, the advantages of this application are:

[0023] The present application uses a fixture with a docking joint and a frame with a power-on detection mechanism, a static detection mechanism, a dynamic detection mechanism and a loading and unloading station to conduct a comprehensive detection of the opening and closing mechanical life and the power-on life of the circuit breaker under static and dynamic conditions. It has an automatic loading and unloading function, eliminates manual operation under electrical working conditions, effectively improves detection safety and efficiency, has market prospects, and is suitable for promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of this application;

[0025] Figure 2 It is a structural schematic diagram of the circuit breaker proposed in this application;

[0026] Figure 3 It is a structural schematic diagram of the static detection mechanism proposed in this application;

[0027] Figure 4 It is a structural schematic diagram of the detection ring and the circuit breaker proposed in this application;

[0028] Figure 5 A perspective view of the structure of the detection ring proposed in this application;

[0029] Figure 6 This is a schematic diagram of the rotation direction of the detection ring proposed in this application;

[0030] Figure 7 It is a schematic diagram of the state when the clamp proposed in this application is separated from the rotating disk;

[0031] Figure 8 It is a schematic diagram of the structure of the clamp and the circuit breaker proposed in this application;

[0032] Fig. 9 It is a schematic diagram of the front explosion structure of the clamp proposed in this application;

[0033] Fig.10 It is a schematic diagram of the exploded structure of the bottom surface of the clamp proposed in this application;

[0034] Fig.11 This is a schematic diagram of the unlocked state of the clamp proposed in this application;

[0035] Fig.12 It is a structural schematic diagram of the butt joint proposed in this application;

[0036] Fig.13 It is a structural schematic diagram of the power supply mechanism proposed in this application;

[0037] Fig.14 It is a schematic diagram of the cross-sectional structure in this application;

[0038] Fig.15 for Fig.14 Schematic diagram of the enlarged structure of part A in the middle.

[0039] Description of the numbers in the figure:

[0040] 1. Frame; 101. Limit block; 11. Rotating plate; 12. Assembly slot; 2. Detection ring; 21. Passage notch; 22. Pusher claw; 3. Power-on detection mechanism; 4. Static detection mechanism; 41. Static detection bracket; 42. Static rotary cylinder; 5. Dynamic detection mechanism; 51. Dynamic detection bracket; 52. Telescopic cylinder; 53. Dynamic rotary cylinder; 54. Linkage bracket; 6. Loading and unloading station; 7. Fixture; 71. Fixed base; 711. Limit slide rail; 712. Spline groove; 72. Actuator seat; 721. Spline shaft; 722. Complex Positioning spring; 723, rotating shaft; 724, positioning pin; 725, material withdrawal spring; 73, flip bracket; 731, limiting slide groove; 732, flip force arm; 733, driving roller; 734, conductive voltage block; 74, supporting seat; 741, silicone pad; 742, sliding sleeve; 743, driving groove; 75, docking head; 751, positioning arc groove; 752, conductive arc groove; 8, circuit breaker; 81, switch handle; 82, wiring input and output terminals; 83, positioning hole; 9, power supply mechanism; 901, tensioning spring; 91, T-pin; 92, conductive arc rail. DETAILED DESCRIPTION

[0041] The embodiments will be combined with the drawings in the specification to clearly and completely describe the technical solution of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making any creative work shall fall within the scope of protection of the present application.

[0042] Embodiment 1:

[0043] See also Figure 1 - Fig.15 , including a frame 1, a fixture 7 for clamping a circuit breaker 8 is provided on the frame 1, a static detection mechanism 4 is also provided on the frame 1, the static detection mechanism 4 includes a static detection bracket 41 fixed on the frame 1, a static rotating cylinder 42 is also fixed on the static detection bracket 41, and a detection ring 2 is fixed on the output end of the static rotating cylinder 42;

[0044] See also Figure 4 - Figure 6 Two groups of symmetrically arranged passage notches 21 are provided at the bottom of the detection ring 2, and two groups of rotationally symmetrical pusher claws 22 are fixed inside the detection ring 2. Specifically, a switch handle 81 is provided on the circuit breaker 8, and the spacing between the two groups of passage notches 21 at the bottom of the detection ring 2 is smaller than the maximum stroke spacing of the switch handle 81. The distance between the pusher claw 22 and the inner diameter of the detection ring 2 is greater than half of the maximum stroke of the switch handle 81, and the inner side of the pusher claw 22 is in an arc shape.

[0045] It should be noted that the static rotary cylinder 42 drives the detection ring 2 to perform 180° equal-angle intermittent rotation, so that the detection ring 2 can maintain a fixed angle of the passage notch 21 no matter how many times it rotates. When the clamp 7 clamps the circuit breaker 8 and runs to the bottom of the static detection mechanism 4, the spacing of the passage notch 21 is set so that the switch handle 81 on the circuit breaker 8 transported to the bottom of the static detection mechanism 4 will not collide with the detection ring 2 as a whole regardless of whether it is in an open or closed state.

[0046] When the circuit breaker 8 is located directly below the static detection mechanism 4, the static rotary cylinder 42 drives the detection ring 2 to perform intermittent rotation at equal angles, and uses the pusher claw 22 to push the switch handle 81 cyclically and reciprocatingly to simulate the action of opening and closing the switch handle 81, so as to detect the mechanical opening and closing life of the switch handle 81. The specific opening and closing times of the switch handle 81 can be calculated by the number of rotations of the static rotary cylinder 42. Compared with the traditional combination of a ball screw and a linear guide, the present application converts the rotary motion of the motor into a linear reciprocating motion push-and-close simulation mechanism, which has a simple structure, a fast opening and closing speed, and low operating power consumption, thereby effectively reducing the operating cost of the opening and closing simulation;

[0047] Furthermore, the finger 22 is coated with a rubber layer, and the friction coefficient of the rubber layer is the same as the friction coefficient of a human hand. By installing a CCD rubber on the frame 1, the wear rate of the surface of the switch handle 81 after multiple openings and closings can be detected.

[0048] See also Figure 1 and Figure 7 Furthermore, a rotating disk 11 is provided on the frame 1, and four sets of clamps 7 are evenly fixed on the rotating disk 11 at equal angles. The frame 1 is also provided with a power-on detection mechanism 3, a dynamic detection mechanism 5 and a loading and unloading station 6. The power-on detection mechanism 3, the static detection mechanism 4, the dynamic detection mechanism 5 and the loading and unloading station 6 are evenly arranged along the circumferential side of the rotating disk 11 at equal angles.

[0049] See also Figure 8 - Fig.13 , wherein the fixture 7 includes a fixed base 71, a mounting groove 12 matching the fixed base 71 is provided on the rotating disk 11, the fixed base 71 is fixed in the mounting groove 12, an execution seat 72 is provided on the top of the fixed base 71, a spline shaft 721 is fixed on the bottom of the execution seat 72, a spline groove 712 corresponding to the spline shaft 721 is provided on the fixed base 71, the bottom end of the spline shaft 721 extends through the spline groove 712 and is fixed with a docking head 75, and a return spring 722 is also clamped between the docking head 75 and the fixed base 71;

[0050] Four positioning pins 724 arranged opposite to each other are fixed on the top of the actuator seat 72, and positioning holes 83 corresponding to the positioning pins 724 are provided at the bottom of the circuit breaker 8. Both ends of the actuator seat 72 are rotatably connected to the flip bracket 73 through the rotating shaft 723. A plurality of conductive blocks 734 are provided on the top of the flip bracket 73, and the circuit breaker 8 is provided with wiring input and output terminals 82 corresponding to the conductive blocks 734.

[0051] A supporting seat 74 is also provided on the top of the execution seat 72. A silicone pad 741 is fixed on the top of the supporting seat 74. A sliding sleeve 742 corresponding to the positioning pin 724 is provided on the supporting seat 74. A material-removing spring 725 is clamped between the supporting seat 74 and the execution seat 72. Flipping force arms 732 are symmetrically fixed on both sides of the flip bracket 73. A driving roller 733 is fixed on one end of the flipping force arm 732 away from the conductive voltage block 734. A driving groove 743 corresponding to the material-removing spring 725 is provided on one side of the bottom of the supporting seat 74.

[0052] The fixed base 71 is provided with relative and vertically arranged limiting slide rails 711 , and the opposite side of the flip bracket 73 is provided with limiting slide grooves 731 matching with the limiting slide rails 711 .

[0053] See also Fig.12 - Fig.13A positioning arc groove 751 is provided at the bottom of the docking head 75, and two groups of conductive arc grooves 752 are symmetrically provided on both sides of the positioning arc groove 751. A power supply mechanism 9 matching with the docking head 75 is provided at the top of the frame 1. A conductive arc rail 92 corresponding to the conductive arc groove 752 and a T-pin 91 corresponding to the positioning arc groove 751 are provided at the top of the power supply mechanism 9. The positioning arc groove 751 and the conductive arc groove 752 are both concentrically arranged with the rotating disk 11.

[0054] See also Figure 1 The loading and unloading station 6 includes an XZ axis linear module (not numbered in the figure), and a pneumatic clamp (not numbered in the figure) is fixed to the output end of the XZ axis linear module. The frame 1 is also fixed with a top column (not shown in the figure) at the bottom of the loading and unloading station 6, and the top column matches the positioning arc groove 751 of the fixture 7.

[0055] See also Figure 8 - Fig.11 In actual use, when the fixture 7 carrying the circuit breaker 8 completes the detection operation and runs to the loading and unloading station 6, the top column cooperates with the positioning arc groove 751 on the docking head 75 to lift the docking head 75, the actuator seat 72, the flip bracket 73 and the supporting seat 74 to overcome the elastic force of the reset spring 722 and move up to the maximum stroke. At this time, the limiting slide groove 731 is disengaged from the limiting slide rail 711, and the elastic potential energy of the ejection spring 725 between the supporting seat 74 and the actuator seat 72 is released, so that the ejection spring 725 drives the supporting seat 74 along the positioning pin, 724 moves upward. During the upward movement of the supporting seat 74, the driving groove 743 and the driving roller 733 are used to drive the flip bracket 73 to flip around the rotating shaft 723, thereby separating the conductive voltage block 734 from the wiring inlet and outlet terminals 82 of the circuit breaker 8. At the same time, due to the upward movement of the supporting seat 74, the positioning pin 724 is separated from the positioning hole 83 of the circuit breaker 8, thereby completely separating the circuit breaker 8 from the clamp 7 to form an unlocked state. The loading and unloading station 6 can use the XZ axis linear module to drive the pneumatic clamp to clamp the circuit breaker 8 to complete the unloading action of the circuit breaker 8.

[0056] Similarly, when the clamp 7 at the loading and unloading station 6 is in an unlocked state, the loading and unloading station 6 can use the XZ axis linear module to drive the pneumatic clamp to clamp the undetected circuit breaker 8 to prevent it from being on the clamp 7, and use the silicone pad 741 to prevent the circuit breaker 8 from shifting horizontally. When the rotating disk 11 drives the clamp 7 at the bottom of the loading and unloading station 6 to move to the next station, the clamp 7 is separated from the top column at the loading and unloading station 6, and the compressed elastic potential energy of the reset spring 722 is released, driving the docking head 75, the actuator seat 72, the flip bracket 73 and the supporting seat 74 to move down to the maximum stroke. During the process, the flipped flip bracket 73 is restricted by the limiting slide rail 711 on the limiting slide groove 731, so that the two groups of flip brackets 73 flip inward, and the driving roller 733 is used to press the driving groove 743 in the opposite direction, so that the supporting seat 74 moves down and compresses the ejection spring 725. At this time, the positioning pin 724 is engaged with the positioning hole 83 of the circuit breaker 8, further limiting the horizontal displacement of the circuit breaker 8. The flip bracket 73 turns inward and uses the conductive voltage block 734 to press the wiring input and output terminals 82 of the circuit breaker 8, thereby limiting the vertical displacement of the circuit breaker 8 to form a locked state.

[0057] Furthermore, a control unit is also provided on the rack 1, and the conductive arc rails 92 of the power supply mechanism 9 are powered by the control unit. The control unit is also connected to a current sensor and a voltage sensor. The rack 1 is provided with a power supply mechanism 9 at the bottom of the power-on detection mechanism 3, the static detection mechanism 4 and the dynamic detection mechanism 5, wherein the power supply mechanisms 9 of the power-on detection mechanism 3 and the static detection mechanism 4 are fixedly connected to the rack 1.

[0058] When the rotating disk 11 drives the clamp 7 for locking the circuit breaker 8 to run to the power-on detection mechanism 3, the T-pin 91 is inserted into the positioning arc groove 751 of the docking joint 75 to further lock the clamp 7, thereby maintaining the pressing stability of the conductive voltage block 734 and the wiring input and output terminals 82 to prevent the unstable electrical connection caused by virtual connection. At the same time, while keeping the switch handles 81 of the circuit breaker 8 transported by the loading and unloading stations 6 in the open state, two sets of conductive arc rails 92 are used to electrically connect the two sets of conductive arc grooves 752 to form a closed loop, so as to perform a preliminary detection of the power-on condition of the circuit breaker 8.

[0059] When the rotating disk 11 drives the circuit breaker 8 that has passed the inspection of the power-on inspection mechanism 3 to enter the bottom of the static inspection mechanism 4, on the one hand, the static rotating cylinder 42 is used to drive the inspection ring 2 to rotate to detect the opening and closing life of the switch handle 81. On the other hand, two groups of conductive arc rails 92 are used to electrically connect the two groups of conductive arc grooves 752 to form a closed loop, so as to detect the power-on condition of the circuit breaker 8 during the opening and closing process, and record the power-on life of the circuit breaker 8 after multiple openings and closings.

[0060] For further information, see Fig.14 - Fig.15The dynamic detection mechanism 5 includes a dynamic detection bracket 51, a telescopic cylinder 52 is fixed on the dynamic detection bracket 51, a dynamic rotating cylinder 53 is fixed on the output end of the telescopic cylinder 52, and a detection ring 2 is fixed on the output end of the dynamic rotating cylinder 53;

[0061] A linkage bracket 54 is also fixed to the output end of the telescopic cylinder 52. The power supply mechanism 9 at the bottom of the dynamic detection mechanism 5 is slidably connected to the frame 1 in the vertical direction. The linkage bracket 54 is fixedly connected to the bottom of the power supply mechanism 9. A tensioning spring 901 is also clamped between the power supply mechanism 9 and the rotating disk 11. The rotating disk 11 is also provided with a limit block 101 for limiting the upward movement height of the power supply mechanism 9.

[0062] When the circuit breaker 8 that has passed the inspection of the static inspection mechanism 4 is driven by the rotating disk 11 to enter the bottom of the dynamic inspection mechanism 5, the dynamic inspection mechanism 5 drives the telescopic cylinder 52 to reciprocate up and down, and uses the linkage bracket 54 to drive the power supply mechanism 9 and the clamp 7 to reciprocate within the travel range of the limit slide rail 711. Since the dynamic rotating cylinder 53 synchronously follows the clamp 7 to move, the inspection ring 2 on the dynamic rotating cylinder 53 and the switch handle 81 on the circuit breaker 8 are kept relatively still. At this time, the dynamic rotating cylinder 53 is used to drive the inspection ring 2 to rotate, and then the inspection ring 2 is used to drive the switch handle 81 to open and close, thereby simulating the power-on condition of the circuit breaker 8 during the opening and closing process under vibration conditions, and detecting the power-on life of the circuit breaker 8 under vibration conditions.

[0063] The present application uses a clamp 7 with a docking joint 75 and a frame 1 with a power-on detection mechanism 3, a static detection mechanism 4, a dynamic detection mechanism 5 and a loading and unloading station 6 to comprehensively detect the opening and closing mechanical life and power-on life of a circuit breaker 8 under static and dynamic conditions. It has an automatic loading and unloading function, eliminates manual operation under electrical working conditions, effectively improves detection safety and efficiency, has market prospects, and is suitable for promotion and application.

[0064] The above is only the best implementation method adopted by this application in combination with current actual needs, but the protection scope of this application is not limited to this.

Claims

1. A mechanical life test device for a molded case circuit breaker, comprising a frame (1), the frame (1) being provided with a fixture (7) for clamping a circuit breaker (8), the frame (1) being further provided with a static detection mechanism (4), characterized in that: The static detection mechanism (4) comprises a static detection bracket (41) fixed on the frame (1), a static rotary cylinder (42) is also fixed on the static detection bracket (41), and a detection ring (2) is fixed on the output end of the static rotary cylinder (42); The bottom of the detection ring (2) is provided with two groups of symmetrically arranged passage notches (21), and two groups of rotationally symmetrical pusher claws (22) are fixed inside the detection ring (2).

2. A molded case circuit breaker mechanical life test device according to claim 1, characterized in that: The circuit breaker (8) is provided with a switch handle (81), the spacing between the two groups of passage notches (21) at the bottom of the detection ring (2) is smaller than the maximum travel spacing of the switch handle (81), the distance between the pusher claw (22) and the inner diameter of the detection ring (2) is larger than half of the maximum travel of the switch handle (81), and the inner side of the pusher claw (22) is in an arc shape.

3. A molded case circuit breaker mechanical life test device according to claim 2, characterized in that: The frame (1) is provided with a rotating disk (11), and the four groups of clamps (7) are fixed on the rotating disk (11) at equal angles. The frame (1) is also provided with a power-on detection mechanism (3), a dynamic detection mechanism (5) and a loading and unloading station (6). The power-on detection mechanism (3), the static detection mechanism (4), the dynamic detection mechanism (5) and the loading and unloading station (6) are arranged at equal angles along the circumferential side of the rotating disk (11).

4. A molded case circuit breaker mechanical life test device according to claim 3, characterized in that: The clamp (7) comprises a fixed base (71), the rotating disk (11) is provided with an assembly groove (12) matching the fixed base (71), the fixed base (71) is fixed in the assembly groove (12), the top of the fixed base (71) is provided with an execution base (72), the bottom of the execution base (72) is fixed with a spline shaft (721), the fixed base (71) is provided with a spline groove (712) corresponding to the spline shaft (721), the bottom end of the spline shaft (721) extends through the spline groove (712) and is fixed with a docking joint (75), and a return spring (722) is clamped between the docking joint (75) and the fixed base (71); Four positioning pins (724) arranged opposite to each other are fixed on the top of the actuator seat (72); positioning holes (83) corresponding to the positioning pins (724) are provided on the bottom of the circuit breaker (8); both ends of the actuator seat (72) are rotatably connected to a flip bracket (73) via a rotating shaft (723); a plurality of conductive voltage blocks (734) are provided on the top of the flip bracket (73); and wiring input and output terminals (82) corresponding to the conductive voltage blocks (734) are provided on the circuit breaker (8); A supporting seat (74) is also provided on the top of the execution seat (72), a silicone pad (741) is fixed on the top of the supporting seat (74), a sliding sleeve (742) corresponding to the positioning pin (724) is provided on the supporting seat (74), and a material withdrawal spring (725) is clamped between the supporting seat (74) and the execution seat (72); Flip force arms (732) are symmetrically fixed on both sides of the flip bracket (73), a driving roller (733) is fixed on one end of the flip force arm (732) away from the conductive voltage block (734), and a driving groove (743) corresponding to the material withdrawal spring (725) is provided on one side of the bottom of the support seat (74); The fixed base (71) is provided with a relative and vertically arranged limiting slide rail (711), and the side of the flip bracket (73) away from the limiting slide rail (711) is provided with a limiting slide groove (731) matching the limiting slide rail (711).

5. A molded case circuit breaker mechanical life test device according to claim 4, characterized in that: A positioning arc groove (751) is provided at the bottom of the docking head (75), two groups of conductive arc grooves (752) are symmetrically arranged on both sides of the positioning arc groove (751), a power supply mechanism (9) matched with the docking head (75) is provided at the top of the frame (1), and a conductive arc rail (92) corresponding to the conductive arc groove (752) and a T-shaped pin (91) corresponding to the positioning arc groove (751) are provided at the top of the power supply mechanism (9).

6. A molded case circuit breaker mechanical life test device according to claim 5, characterized in that: The positioning arc groove (751) and the conductive arc groove (752) are both arranged concentrically with the rotating disk (11).

7. A molded case circuit breaker mechanical life test device according to claim 5, characterized in that: The frame (1) is provided with a power supply mechanism (9) at the bottom of the power-on detection mechanism (3), the static detection mechanism (4) and the dynamic detection mechanism (5), wherein the power supply mechanisms (9) of the power-on detection mechanism (3) and the static detection mechanism (4) are fixedly connected to the frame (1).

8. A molded case circuit breaker mechanical life test device according to claim 7, characterized in that: The dynamic detection mechanism (5) comprises a dynamic detection bracket (51), a telescopic cylinder (52) is fixed on the dynamic detection bracket (51), a dynamic rotating cylinder (53) is fixed at the output end of the telescopic cylinder (52), and the detection ring (2) is fixed at the output end of the dynamic rotating cylinder (53); A linkage bracket (54) is also fixed to the output end of the telescopic cylinder (52); a power supply mechanism (9) at the bottom of the dynamic detection mechanism (5) is slidably connected to the frame (1) in the vertical direction; the linkage bracket (54) is fixedly connected to the bottom of the power supply mechanism (9); a tension spring (901) is clamped between the power supply mechanism (9) and the rotating disk (11); and a limit block (101) is also provided on the rotating disk (11) for limiting the upward movement height of the power supply mechanism (9).

9. A molded case circuit breaker mechanical life test device according to claim 8, characterized in that: The loading and unloading station (6) comprises an XZ axis linear module, an output end of the XZ axis linear module is fixed with a pneumatic clamp, and the frame (1) is also fixed with a top column at the bottom of the loading and unloading station (6), and the top column matches the positioning arc groove (751) of the clamp (7).

10. A molded case circuit breaker mechanical life test device according to claim 9, characterized in that: The frame (1) is also provided with a control unit, and the conductive arc rails (92) of the power supply mechanism (9) are all powered by the control unit. The control unit is also connected to a current sensor and a voltage sensor.

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