Instantaneous closing device of rapid grounding mechanism

Abstract

The utility model relates to an instantaneous closing device of a quick grounding mechanism, which relates to the technical field of high-voltage switch mechanisms, comprises a mounting frame, a driven connecting lever rotationally connected with a telescopic rod, and an output shaft fixedly connected to the driven connecting lever, and is characterized in that the output shaft extends out of the mounting frame, and also comprises a large connecting lever, a small connecting lever and a large connecting lever, the output shaft is fixedly connected to one side, extending out of the mounting frame, of the output shaft; and a tripping assembly which is installed outside the installation frame, abuts against the large crank arm, and is used for limiting the rotation of the large crank arm. The device has the advantages that the telescopic rod can be kept at the middle or upper position, and therefore the success rate of an experiment is increased.

Description

Technical Field

[0001] The present application relates to the technical field of high-voltage switch mechanisms, and in particular to an instantaneous closing device of a rapid grounding mechanism. Background Art

[0002] The fast earthing switch is a special-purpose earthing switch with a certain short-circuit current closing capability.

[0003] In related technologies, such as Figure 1 The limiting device of the quick grounding mechanism includes a mounting frame 1, one end of the mounting frame 1 is fixedly connected to a motor 7, the output end of the motor 7 is connected to a gear set 8, one end of the mounting frame 1 is fixedly connected to a bearing seat 81, the middle part of the bearing seat 81 is movably connected to a worm 82 through a bearing, one end of the worm 82 is connected to the gear set 8, the upper end of the worm 82 is meshed with a worm wheel 83, the middle part of the worm wheel 83 is fixedly connected to an output shaft 3, the other side of one end of the mounting frame 1 is movably connected to a telescopic rod 2 through a pin shaft, the outer side of the telescopic rod 2 is sleeved with a spring 21, one end of the telescopic rod 2 is penetrated and connected with a driven pin shaft, one end of the driven pin shaft is movably connected to a crank arm, and the other end of the mounting frame is fixedly connected to two symmetrically distributed oil pressure buffers through an angle steel.

[0004] Regarding the above-mentioned related technologies, in order to make the test time accurate, the telescopic rod and the spring are usually manually adjusted to a position above the midpoint to maximize the pre-stored energy value. However, at this time, the spring force value is relatively large, and the telescopic rod is driven by the spring to easily close the switch before the power is turned on for the experiment, resulting in failure of the experiment and a low success rate of the experiment. Utility Model Content

[0005] In order to enable the telescopic rod to maintain a position that is over the middle or slightly above, thereby improving the success rate of the experiment, the present application provides an instantaneous closing device of a quick grounding mechanism.

[0006] The instantaneous closing device of a rapid grounding mechanism provided in the present application adopts the following technical solution:

[0007] An instantaneous closing device of a quick grounding mechanism comprises a mounting frame, a driven crank arm rotatably connected to a telescopic rod, an output shaft fixedly connected to the driven crank arm, the output shaft extending outside the mounting frame, and further comprising:

[0008] A large crank arm, fixedly connected to one side of the output shaft extending outside the mounting frame;

[0009] A trip assembly is installed outside the mounting frame and abuts against the large crank arm, and is used to limit the rotation of the large crank arm.

[0010] By adopting the above technical solution and the setting of the tripping assembly, when the staff rotates the telescopic rod from the open state to the over-center state, the tripping assembly can be pressed against the large crank arm, thereby limiting the rotation of the entire output shaft, preventing the telescopic rod from instantly changing to the closed state under the drive of the spring, and increasing the energy storage value while keeping the telescopic rod in the over-center state, thereby improving the success rate of the experiment.

[0011] Optionally, the trip assembly includes:

[0012] A fixing frame, fixedly connected to one side of the mounting frame, wherein a first rotating pin is fixedly connected inside the fixing frame;

[0013] A first rocker arm is sleeved and rotatably connected to the first rotating pin, and both ends of the first rocker arm are movable ends;

[0014] The second rocker arm is rotatably connected to one of the movable ends. The second rocker arm has a limiting surface abutting against the end of the large crank arm to limit the rotation of the large crank arm.

[0015] By adopting the above technical scheme, the structure of the trip assembly is specifically disclosed. When the telescopic rod is rotated to the middle position, one end of the second rocker arm can be pressed against the large crank arm to limit the movement of the large crank arm, thereby limiting the output shaft on the large crank arm from driving the driven crank arm to rotate, thereby avoiding the movement of the telescopic rod connected to the driven crank arm.

[0016] Optionally, the trip assembly further includes:

[0017] A switch-off half-shaft is rotatably connected to the fixing frame and extends outside the fixing frame, a avoidance groove is provided on the switch-off half-shaft, and an end of the first rocker arm away from the second rocker arm abuts against a side wall of the switch-off half-shaft;

[0018] A first torsion spring is sleeved on the opening switch half-shaft, a force-applying end of the first torsion spring is fixedly connected to the fixing frame, and a force-receiving end of the first torsion spring is fixedly connected to the opening switch half-shaft. When the first torsion spring drives the opening switch half-shaft to rotate, an end of the first rocker arm away from the second rocker arm passes through the avoidance groove and then detaches from the opening switch half-shaft.

[0019] A limiting shaft is rotatably connected to the outside of the fixing frame and is on the same side as the opening half shaft extending to the outside of the fixing frame;

[0020] A push plate, fixedly connected to one side of the limit shaft close to the opening half shaft, one end of the push plate is clamped in the avoidance groove to limit the rotation of the opening half shaft, and the other end of the push plate extends into the fixing frame;

[0021] The closing coil is fixedly connected to the fixing frame and is located above one end of the push plate away from the opening half shaft, and is used to push the movement of the push plate.

[0022] By adopting the above technical scheme, the structure of other tripping components is specifically disclosed, wherein the closing coil is started, squeezing the push plate to rotate, at which time one end of the push plate moves away from the avoidance groove, and the first torsion spring on the opening half-shaft drives the opening half-shaft to rotate slightly under the movement of the push plate, and the first rocker arm abutting on the opening half-shaft leaves the opening half-shaft after passing through the avoidance groove. At this time, the first rocker arm drives the second rocker arm to move, and the second rocker arm is separated from the large crank arm, and the telescopic rod completes the closing action under the action of the spring, so that the closing coil is energized or manually pressed to unlock the restriction of the second rocker arm on the large crank arm, thereby realizing automatic unlocking, reducing the manual movement of the first rocker arm and the second rocker arm by the staff, and improving the working efficiency of the tripping component.

[0023] Optionally, a second torsion spring is sleeved on the first rotating pin to drive the first rocker arm to return to its original position.

[0024] By adopting the above technical solution and the setting of the second torsion spring, when the first rocker arm disengages from the avoidance groove and causes the opening half-shaft to rotate slightly, the second torsion spring drives the first rocker arm to rotate in the opposite direction, and moves to its original position after passing through the avoidance groove. Almost instantly, the first torsion spring on the opening half-shaft drives the push plate back into the avoidance groove, thereby continuing to restrict the first rocker arm, making it easier for the trip assembly to be used again, thereby improving the use efficiency of the trip assembly.

[0025] Optionally, a limit block is fixedly connected inside the fixing frame and is used to limit the first rocker arm from moving away from the opening half-axis.

[0026] By adopting the above technical solution and setting the limit block, the first rocker arm is located between the opening half shaft and the limit block, which can reduce the excessive reset movement of the first rocker arm under the action of the second torsion spring and limit the moving distance of the first rocker arm.

[0027] Optionally, a limiting groove for placing the second rocker arm is provided at the end of the first rocker arm, and a second rotating pin is provided on the first rocker arm. The second rotating pin passes through the first rocker arm and the second rocker arm and extends outside the first rocker arm. The second rocker arm is provided with an abutment surface that abuts against the bottom wall of the limiting groove, and a guide surface is provided on the side of the second rocker arm close to the placement groove to facilitate the rotation of the second rocker arm toward the closing coil.

[0028] By adopting the above technical scheme, when the abutment surface abuts against the bottom wall of the placement groove, the rotation direction of the second rocker arm and the first rocker arm can be limited to prevent the second rocker arm from rotating toward the opening half-axis; the setting of the guide surface can guide the second rocker arm to move in the direction away from the opening half-axis, thereby providing space for the large crank arm to move after closing the switch, so that the large crank arm can return to its original position under the rotation of the staff.

[0029] Optionally, a third torsion spring is sleeved on the second rotating pin to drive the abutting surface to press against the bottom wall of the limiting groove.

[0030] By adopting the above technical solution, the setting of the third torsion spring can drive the second rocker arm that avoids the large crank arm to rotate back to its original position, so that the abutment surface continues to abut against the bottom wall of the placement groove, and continues to limit the large crank arm in the over-center state.

[0031] Optionally, two opposite inner side walls of the fixing frame are provided with arc-shaped rotation grooves for sliding two ends of the second rotation pin.

[0032] By adopting the above technical solution, the two ends of the second rotating pin slide in the rotating groove respectively. When the first rocker arm rotates, the second rotating pin can also slide in the rotating groove, thereby improving the stability of the first rocker arm and the second rocker arm when the first rocker arm rotates.

[0033] Optionally, the end of the large crank arm is rotatably connected to a roller abutting against the first rocker arm.

[0034] By adopting the above technical solution, the end of the large crank arm is rotatably connected to a roller, so that the friction between the end of the large crank arm and the second rocker arm is converted into sliding friction, reducing the wear of the large crank arm and the second rocker arm and improving the use efficiency of the second rocker arm.

[0035] In summary, the present application includes at least one of the following beneficial technical effects:

[0036] 1. The setting of the trip assembly can limit the rotation of the entire output shaft, preventing the telescopic rod from instantly changing to the closed state under the drive of the spring. While increasing the energy storage value, the telescopic rod can be kept in the over-center state, thereby improving the success rate of the experiment;

[0037] 2. The setting of the limit block makes the first rocker arm located between the opening half shaft and the limit block, which can reduce the excessive reset movement of the first rocker arm under the action of the second torsion spring and limit the moving distance of the first rocker arm;

[0038] 3. The setting of the roller converts the friction between the end of the large crank arm and the second rocker arm into sliding friction, thereby reducing the wear of the large crank arm and the second rocker arm and improving the use efficiency of the second rocker arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a top view of the instantaneous closing device of a rapid grounding mechanism.

[0040] Figure 2 It is a side structural diagram of the open state of an instantaneous closing device of a rapid grounding mechanism in an embodiment of the present application.

[0041] Figure 3 It is a side structural diagram of the intermediate state of an instantaneous closing device of a rapid grounding mechanism in an embodiment of the present application.

[0042] Figure 4 It is a side structural diagram of the closed state of an instantaneous closing device of a rapid grounding mechanism in an embodiment of the present application.

[0043] Figure 5 It is a partial side structural diagram of the trip assembly in the intermediate state in the embodiment of the present application.

[0044] Figure 6 It is a partial side structural diagram of the closed state of the trip assembly in the embodiment of the present application.

[0045] Explanation of the reference numerals in the accompanying drawings: 1. mounting bracket; 2. telescopic rod; 21. spring; 3. output shaft; 4. driven crank arm; 5. large crank arm; 51. roller; 6. trip assembly; 61. fixing bracket; 611. first rotating pin; 612. second torsion spring; 613. limiting block; 614. rotating groove; 62. first rocker arm; 621. limiting groove; 622. second rotating pin; 6221. third torsion spring; 63. second rocker arm; 631. limiting surface; 632. abutting surface; 634. guiding surface; 64. opening half shaft; 641. avoidance groove; 65. first torsion spring; 66. limiting shaft; 67. push plate; 68. closing coil; 7. motor; 8. gear set; 81. bearing seat; 82. worm; 83. worm wheel. DETAILED DESCRIPTION

[0046] The following is combined with Figure 2-6 This application is described in further detail.

[0047] A coordinate system XY is provided in the drawings of the embodiments of the present application, wherein the positive direction of the X axis represents the right side, the negative direction of the X axis represents the left side, the positive direction of the Y axis represents the top, and the negative direction of the Y axis represents the bottom.

[0048] The present application embodiment discloses an instantaneous closing device of a rapid grounding mechanism. Figure 2 and Figure 3, an instantaneous closing device of a quick grounding mechanism comprises a mounting frame 1, a telescopic rod 2, an output shaft 3, a driven crank arm 4, a large crank arm 5 and a release assembly 6. The output shaft 3 is passed through two opposite sides of the mounting frame 1 and extends outside the mounting frame 1, so that the output shaft 3 can be rotatably connected to the mounting frame 1. One end of the driven crank arm 4 is fixedly connected to the output shaft 3 and is located in the mounting frame 1, the telescopic rod 2 is located in the mounting frame 1 along the length direction of the mounting frame 1, one end of the telescopic rod 2 is fixedly connected to the mounting frame 1, and the other end of the telescopic rod 2 is rotatably connected to the end of the driven crank arm 4 away from the output shaft 3, so that the driven crank arm 4 rotates with the output shaft 3 while driving one end of the telescopic rod 2 to move. The large crank arm 5 is fixedly connected to the output shaft 3, and the release assembly 6 is installed on the mounting frame 1, thereby limiting the movement of the large crank arm 5.

[0049] Combination Figure 4 In the embodiment of the present application, when the telescopic rod 2 and the driven crank arm 4 are arranged in the same straight line, the high-voltage switch quick grounding mechanism is in the over-center state; when the telescopic rod 2 and the driven crank arm 4 are arranged at a certain angle and one end of the telescopic rod 2 is located above the output shaft 3, the high-voltage switch quick grounding mechanism is in the closed state; when the telescopic rod 2 and the driven crank arm 4 are arranged at a certain angle and one end of the telescopic rod 2 is located below the output shaft 3, the high-voltage switch quick grounding mechanism is in the open state.

[0050] Reference Figure 5 and Figure 6 , the driven crank arm 4 and the large crank arm 5 are arranged at a certain angle, the large crank arm 5 is fixedly connected to one end of the output shaft 3 extending outside the mounting frame 1, and the large crank arm 5 and the mounting frame 1 are located on the same side of the mounting frame 1. The trip assembly 6 includes a fixed frame 61, a first rocker arm 62, a second rocker arm 63, a half shaft 64 for opening the switch, a first torsion spring 65, a limit shaft 66, a push plate 67 and a closing coil 68. The fixed frame 61 is fixedly connected to one side of the mounting frame 1 close to the large crank arm 5, a first rotating pin 611 is fixedly connected inside the fixed frame 61, the first rocker arm 62 is sleeved and rotatably connected to the first rotating pin 611, and both ends of the first rocker arm 62 are movable ends, so that the first rocker arm 62 can be rotatably connected inside the fixed frame 61.

[0051] Reference Figure 5 and Figure 6A limiting groove 621 is provided on one of the movable ends of the first rocker arm 62, one end of the second rocker arm 63 is clamped in the limiting groove 621, a second rotating pin 622 is installed on the first rocker arm 62, and the second rotating pin 622 is extended to the outside of the first rocker arm 62 after being arranged through the first rocker arm 62 and the second rocker arm 63. The first rocker arm 62 and the second rocker arm 63 are both arranged vertically with the second rotating pin 622, so that the second rocker arm 63 can rotate relative to the first rocker arm 62. A limiting surface 631 is provided at one end of the second rocker arm 63 away from the first rocker arm 62, and the limiting surface 631 abuts against the end of the large crank arm 5, thereby limiting the large crank arm 5 from moving toward the bottom of the fixing frame 61. The end of the large crank arm 5 is rotatably connected with a roller 51, and the roller 51 abuts against the limiting surface 631, thereby reducing the friction between the limiting surface 631 and the end of the large crank arm 5.

[0052] Reference Figure 5 and Figure 6 , the opening gate semi-shaft 64 is rotatably connected to the inside of the fixing frame 61 and extends outside the fixing frame 61. An avoidance groove 641 is provided on the circumference of the opening gate semi-shaft 64. The bottom surface of the avoidance groove 641 is the axial surface of the opening gate semi-shaft 64. One end of the first rocker arm 62 away from the second rocker arm 63 abuts against the opening gate semi-shaft 64. The first rocker arm 62 extends below the axial surface of the opening gate semi-shaft 64, so that the opening gate semi-shaft 64 can abut and limit the rotation of the first rocker arm 62. The limiting shaft 66 is rotatably connected to the outside of the fixing frame 61 and is on the same side as the end of the opening gate semi-shaft 64 extending outside the fixing frame 61. The limiting shaft 66 is located above the opening gate semi-shaft 64. The push plate 67 is fixedly connected to the bottom of the limiting shaft 66. The push plate 67 is arranged in a Z shape. One end of the push plate 67 located outside the fixing frame 61 is clamped in the avoidance groove 641 of the opening gate semi-shaft 64, thereby limiting the rotation of the opening gate semi-shaft 64.

[0053] Reference Figure 5 and Figure 6, the closing coil 68 is fixedly connected to the fixing frame 61, and the end of the push plate 67 away from the opening half shaft 64 extends to the bottom of the closing coil 68. In the embodiment of the present application, the closing coil 68 is a driving power source. When the closing coil 68 is powered on, the movable rod in the closing coil 68 can push the push plate 67 below, and the push plate 67 rotates slightly with the limit shaft 66 as the rotation axis. At this time, the end of the push plate 67 located in the avoidance groove 641 is tilted. The first torsion spring 65 is sleeved on the end of the opening half shaft 64 extending outside the fixing frame 61, the force-applying end of the first torsion spring 65 is fixedly connected to the fixing frame 61, and the force-receiving end of the first torsion spring 65 is wound around the push plate 67 in the avoidance groove 641, so that when the push plate 67 in the avoidance groove 641 is tilted, the opening half shaft 64 can rotate slightly, and at the same time, the first torsion spring 65 drives the tilted push plate 67 to reset and continue to be clamped in the avoidance groove 641. At this time, when the opening half-shaft 64 rotates slightly, the first rocker arm 62 located in the fixed frame 61 and abutting against the opening half-shaft 64 disengages from the opening half-shaft 64 after passing through the avoidance groove 641 located in the fixed frame 61; the rotating first rocker arm 62 drives the second rocker arm 63 to rotate synchronously, so that the second rocker arm 63 and the large crank arm 5 are separated, thereby loosening the tight restriction on the large crank arm 5, and the entire mechanism is in a closed state at this time.

[0054] Reference Figure 5 and Figure 6 The first rotating pin 611 is sleeved with a second torsion spring 612, the force-applying end of the second torsion spring 612 is fixedly connected to the fixing frame 61, and the force-receiving end of the second torsion spring 612 is fixedly connected to the first rocker arm 62. The end of the first rocker arm 62 away from the second rocker arm 63 is arranged in an arc surface. When the second torsion spring 612 drives the first rocker arm 62 to move toward the opening half shaft 64, the arc surface on the first rocker arm 62 guides the first rocker arm 62 to pass through the avoidance groove 641 and move to the right side of the opening half shaft 64, so as to reset and continue to press against the opening half shaft 64. A limit block 613 is fixedly connected inside the fixing frame 61, and the limit block 613 is located on the right side of the opening half shaft 64. One end of the first rocker arm 62 abutting against the opening half shaft 64 is located between the opening half shaft 64 and the limit block 613, so as to reduce excessive rotation of the first rocker arm 62 when resetting.

[0055] Reference Figure 5 and Figure 6, an abutting surface 632 is provided at one end of the second rocker arm 63 away from the limiting surface 631, and the abutting surface 632 and the bottom wall of the limiting groove 621 abut each other, thereby limiting the second rocker arm 63 from rotating downward toward the side of the large crank arm 5. A guide surface 634 is also provided on the side of the second rocker arm 63 close to the abutting surface 632, and the guide surface 634 is located on the right side of the abutting surface 632 and is adjacent to the abutting surface 632, so that the second rocker arm 63 can rotate downward toward the side of the closing coil 68, and the large crank arm 5 in the closing state can rotate to the original position. A third torsion spring 6221 is sleeved on the second rotating pin 622, and the force-applying end of the third torsion spring 6221 abuts against the second rocker arm 63, and the force-receiving end of the third torsion spring 6221 is fixed to the first rocker arm 62, so that the second rocker arm 63 can be reset in time after rotation, so that the abutting surface 632 continues to abut against the bottom wall of the limiting groove 621. The two opposite inner side walls of the fixing frame 61 are both provided with arc-shaped rotation grooves 614 for the two ends of the second rotation pin 622 to slide, thereby increasing the stability of the first rocker arm 62 and the second rocker arm 63 .

[0056] The implementation principle of the instantaneous closing device of a quick grounding mechanism in an embodiment of the present application is as follows: the staff rotates the output shaft 3, so that the driven crank arm 4 rotates synchronously, and the telescopic rod 2 and the driven crank arm 4 are in a horizontal state. At this time, the large crank arm 5 abuts against the second rocker arm 63, and the closing coil 68 is energized to rotate the push plate 67, thereby driving the opening half shaft 64 to rotate. At this time, the first rocker arm 62 disengages from the opening half shaft 64 from the avoidance groove 641, and the first rocker arm 62 drives the second rocker arm 63 to rotate, and the large crank arm 5 and the limit surface 631 are separated, thereby achieving unlocking. The telescopic rod 2 rotates under the action of the spring 21, and one end of the telescopic rod 2 is located above the output shaft 3. At this time, the mechanism is in a closed state, thereby completing the test.

[0057] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An instantaneous closing device of a quick grounding mechanism, comprising a mounting frame (1), a driven crank arm (4) rotatably connected to a telescopic rod (2), and an output shaft (3) fixedly connected to the driven crank arm (4), characterized in that: The output shaft (3) extends outside the mounting frame (1), and further comprises: A large crank arm (5) fixedly connected to a side of the output shaft (3) extending outside the mounting frame (1); A trip assembly (6) is mounted outside the mounting frame (1) and abuts against the large crank arm (5) and is used to limit the rotation of the large crank arm (5).

2. The instantaneous closing device of a rapid grounding mechanism according to claim 1, characterized in that: The trip assembly (6) comprises: A fixing frame (61) fixedly connected to one side of the mounting frame (1), wherein a first rotating pin (611) is fixedly connected inside the fixing frame (61); A first rocker arm (62) is sleeved and rotatably connected to the first rotating pin (611), and both ends of the first rocker arm (62) are movable ends; The second rocker arm (63) is rotatably connected to one of the movable ends, and the second rocker arm (63) has a limiting surface (631) abutting against the end of the large crank arm (5) for limiting the rotation of the large crank arm (5).

3. The instantaneous closing device of a rapid grounding mechanism according to claim 2, characterized in that: The trip assembly (6) further comprises: A switch-off half-shaft (64) is rotatably connected to the fixing frame (61) and extends outside the fixing frame (61); a avoidance groove (641) is provided on the switch-off half-shaft (64); an end of the first rocker arm (62) away from the second rocker arm (63) abuts against a side wall of the switch-off half-shaft (64); a first torsion spring (65) sleeved on the opening switch half-shaft (64); a force-applying end of the first torsion spring (65) is fixedly connected to the fixing frame (61); a force-receiving end of the first torsion spring (65) is fixedly connected to the opening switch half-shaft (64); when the first torsion spring (65) drives the opening switch half-shaft (64) to rotate, an end of the first rocker arm (62) away from the second rocker arm (63) passes through the avoidance groove (641) and then detaches from the opening switch half-shaft (64); A limit shaft (66) is rotatably connected to the outside of the fixing frame (61) and is on the same side as the opening half shaft (64) extending outside the fixing frame (61); a push plate (67) fixedly connected to a side of the limit shaft (66) close to the opening half shaft (64), one end of the push plate (67) being clamped in the avoidance groove (641) to limit the rotation of the opening half shaft (64), and the other end of the push plate (67) extending into the fixing frame (61); The closing coil (68) is fixedly connected to the fixing frame (61) and is located above an end of the push plate (67) away from the opening half shaft (64), and is used to push the push plate (67) to move.

4. The instantaneous closing device of a rapid grounding mechanism according to claim 3, characterized in that: A second torsion spring (612) is sleeved on the first rotating pin (611) for driving the first rocker arm (62) to return to its original position.

5. The instantaneous closing device of a rapid grounding mechanism according to claim 4, characterized in that: A limit block (613) for limiting the movement of the first rocker arm (62) away from the opening half-shaft (64) is fixedly connected inside the fixing frame (61).

6. The instantaneous closing device of a rapid grounding mechanism according to claim 3, characterized in that: A limiting groove (621) for placing the second rocker arm (63) is provided at the end of the first rocker arm (62), and a second rotating pin (622) is provided on the first rocker arm (62). The second rotating pin (622) passes through the first rocker arm (62) and the second rocker arm (63) and extends outside the first rocker arm (62). The second rocker arm (63) is provided with an abutting surface (632) that abuts against the bottom wall of the limiting groove (621), and a guide surface (634) is provided on a side of the second rocker arm (63) close to the limiting groove (621) so as to facilitate the second rocker arm (63) to rotate toward the closing coil (68).

7. The instantaneous closing device of a rapid grounding mechanism according to claim 6, characterized in that: The second rotating pin (622) is sleeved with a third torsion spring (6221) for driving the abutment surface (632) to abut against the bottom wall of the limiting groove (621).

8. The instantaneous closing device of a rapid grounding mechanism according to claim 7, characterized in that: The two opposite inner side walls of the mounting frame (1) are each provided with an arc-shaped rotation groove (11) for allowing the two ends of the second rotation pin (622) to slide.

9. The instantaneous closing device of a rapid grounding mechanism according to claim 2, characterized in that: The end of the large crank arm (5) is rotatably connected to a roller (51) abutting against the first rocker arm (62).

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