A N-pole module for leakage circuit breaker

Abstract

The present invention provides an N-pole module of a leakage circuit breaker, including an N-pole mechanism that forms a linkage with an L-pole mechanism, the N-pole mechanism including a support frame that is rotatably arranged on a housing through a rotating shaft I, an N-pole moving contact that is rotatably arranged on the support frame, and an elastic pressure piece that is arranged between the N-pole moving contact and the support frame, the N-pole moving contact is provided with a connecting portion, and the support frame is provided with a limiting portion that forms a limiting match with the connecting portion, and the elastic pressure piece provides the required final pressure for the N-pole moving contact. The N-pole mechanism using this technical solution only needs two rotating shafts during assembly, which simplifies the installation structure, has fewer installation parts, is convenient and quick to install, and improves installation efficiency. The entire structure is more compact, the mechanism has good stability, and the installation occupies less space, freeing up the installation space of the N-pole module, and the N-pole moving contact and the L-pole moving contact can be universal, thereby saving costs, improving the N-pole breaking capacity of the leakage circuit breaker, and being safe and reliable to use.

Description

Technical Field

[0001] The invention relates to the technical field of low-voltage electrical appliances, and in particular to an N-pole module of a leakage circuit breaker. Background Art

[0002] A small leakage circuit breaker refers to a switching device that can close, carry and interrupt the current under normal circuit conditions and can close, carry and interrupt the current under abnormal circuit conditions within a specified time. It has overload, short circuit and leakage protection functions. Traditional small leakage circuit breakers mainly include an L-pole unit, an N-pole unit, and a leakage detection part. The L-pole unit is composed of a single circuit breaker, and the N-pole unit includes two N-pole terminals, which are directly connected by wires. The leakage detection part is usually installed in the N-pole unit and electrically connected to the L-pole unit. When the circuit breaker is tripped and disconnected, since the N-pole is not cut off, the N-pole of the leakage circuit breaker may also be energized during actual use, resulting in incomplete circuit cutting and safety hazards.

[0003] For this purpose, the leakage circuit breaker is generally provided with an N-pole mechanism in the N-pole unit, and the N-pole mechanism is linked with the operating mechanism of the L-pole unit to realize the connection and disconnection of the N-pole line. Figure 7 The N-pole mechanism shown comprises an N-pole moving contact 08, an N-pole static contact, a linkage lever 01, a swing link 02 and a tension spring 03 arranged in an N-pole housing. One end of the linkage lever passes through the N-pole housing through a first connecting shaft 04 and is linked to the L-pole operating mechanism. A second connecting shaft 05 is provided on the other end of the linkage lever, and the N-pole moving contact 08 and the swing link 02 are rotatably mounted on the second connecting shaft. A third connecting shaft 06 passing through the N-pole moving contact and the swing link is fixedly provided on the N-pole housing. A strip hole for passing the third connecting shaft 06 is correspondingly provided at the middle position of the N-pole moving contact 08. One end of the tension spring is hooked in the strip hole, and the other end of the tension spring is connected to the fourth connecting shaft 07 of the N-pole housing. When the N-pole mechanism is in the opening and closing operation, the linkage lever drives the N-pole moving contact to rotate around the third connecting shaft through the swing link, and the third connecting shaft changes position in the strip hole during the movement. The overtravel requirement of the N-pole contact can be met by designing the strip hole. It can be seen from the structure of the above-mentioned N-pole mechanism that it still has the following problems: the structure of this N-pole mechanism is complex, four connecting shafts are required in the entire installation process, the installation is cumbersome, the assembly efficiency is low, and the versatility of the N-pole and L-pole contacts is also poor, which will increase the manufacturing cost, and the installation of the entire mechanism occupies a large space, and due to structural limitations, the contact opening distance is made small, which will affect the contact insulation characteristics and electrical life of the circuit breaker. Summary of the invention

[0004] The purpose of the present invention is to overcome the problems that the N-pole mechanism in the leakage circuit breaker of the prior art has a complex structure, four connecting shafts are required in the entire installation process, the installation is cumbersome, the assembly efficiency is low, the installation occupies a large space, and the manufacturing cost is increased.

[0005] In order to solve the above problems, the present invention provides an N-pole module of a leakage circuit breaker, comprising an N-pole mechanism arranged in a housing and forming a linkage with an L-pole mechanism, wherein the N-pole mechanism comprises:

[0006] A support frame is rotatably disposed in the housing via a rotating shaft I, and the support frame is linked with the L-pole mechanism via a linkage shaft;

[0007] A contact assembly, comprising an N-pole moving contact rotatably arranged on the support frame, and an N-pole stationary contact fixed to the housing and matched with the N-pole moving contact, a limiting structure is arranged between the N-pole moving contact and the support frame, and the limiting structure comprises a connecting portion arranged on the N-pole moving contact, and a limiting portion arranged on the support frame and located on the moving path of the connecting portion;

[0008] An elastic pressure piece is arranged between the N-pole moving contact and the support frame. The N-pole moving contact and the support frame are elastically connected through the elastic pressure piece, and the elastic force applied by the elastic pressure piece drives the connecting part and the limiting part to abut against each other to form a limiting fit; when the support frame drives the N-pole moving contact to contact the N-pole static contact, it overcomes the elastic force and rotates a certain stroke relative to the N-pole moving contact, so as to drive the limiting part and the connecting part to separate to form a stroke gap.

[0009] In the above-mentioned N-pole module of the leakage circuit breaker, the spacing of the travel gap is the over-travel distance of the N-pole mechanism, and the over-travel distance is 15%-50% of the contact opening distance.

[0010] In the above-mentioned N-pole module of the leakage circuit breaker, a rotating shaft II rotatably connected to the N-pole moving contact is arranged on the supporting frame, and the elastic pressure piece is a torsion spring sleeved on the rotating shaft II and has a first elastic foot extending and abutting against the supporting frame, and a second elastic foot extending and abutting against the back of the N-pole moving contact.

[0011] In the above-mentioned N-pole module of the leakage circuit breaker, the N-pole moving contact includes a rotating part rotatably sleeved on the rotating shaft II, the connecting part is a protruding stopper formed on the arc edge of the rotating part, and the limiting part is a limiting stopper surface arranged on the support frame and opposite to the protruding stopper.

[0012] In the above-mentioned N-pole module of the leakage circuit breaker, the support frame includes a first limiting groove vertically arranged on the boss structure and formed with a first elastic foot, and the back of the N-pole moving contact is provided with a second limiting groove connected to the second elastic foot. The boss structure includes two stop blocks respectively arranged on the upper and lower sides of the first limiting groove, and the boss structure is provided with a limiting portion on the side facing the connecting portion.

[0013] In the above-mentioned N-pole module of the leakage circuit breaker, the support frame includes a rotating shaft portion provided with a rotating shaft I, and a first rod portion and a second rod portion extending at an angle to each other with the rotating shaft portion as the center, the rotating shaft II is integrally formed on the first rod portion, the linkage shaft is arranged on the second rod portion, the boss structure is formed between the rotating shaft portion and the first rod portion, and the rotating shaft portion is provided with an axial hole for the rotating shaft I to pass through.

[0014] In the above-mentioned N-pole module of the leakage circuit breaker, the rotating shaft I passes through the shaft hole and is fixed to the housing, the supporting frame rotates around the rotating shaft I, and the distance L1 from the linkage shaft to the rotating shaft I is greater than the distance L2 from the rotating shaft II to the rotating shaft I.

[0015] The above-mentioned leakage circuit breaker N-pole module also includes a leakage tripping mechanism arranged in the housing for driving the L-pole mechanism to trip, and the leakage tripping mechanism includes:

[0016] The residual current release has a driving rod that moves back and forth;

[0017] A push rod, which is coaxially rotatable with the support frame and is disposed on the rotating shaft I, and extends to be disposed opposite to the driving rod;

[0018] A tripping rod is linked with the lock of the L-pole mechanism and is extended on the motion path of the push rod. The push rod swings back and forth between the driving rod and the tripping rod.

[0019] The return spring is connected to the push rod member and applies an elastic force to the push rod member to swing toward a side away from the tripping rod.

[0020] In the above-mentioned N-pole module of the leakage circuit breaker, the shell includes two cavities for installing the N-pole mechanism and the L-pole mechanism respectively, and a partition plate arranged between the two chambers, and the partition plate is respectively provided with a first through hole and a second through hole for the linkage shaft and the trip rod to pass through; the first rod portion of the support frame is arranged higher than the rotating shaft portion, and a movable space suitable for the movement of the trip rod is formed between the support frame and the partition plate.

[0021] In the above-mentioned N-pole module of the leakage circuit breaker, the housing is provided with a leakage indication structure, and the leakage indication structure comprises:

[0022] An elastic indicator is slidably disposed on the housing, and a indicating hole is provided on the top of the housing for the elastic indicator to partially pop out;

[0023] A locking assembly is arranged between the elastic indicator and the push rod, and includes a locking block arranged on one side of the elastic indicator and a locking plate arranged on one end of the push rod. The locking plate is provided with a locking hole for the locking block to be inserted. When the locking block is inserted into the locking hole, a locking fit is formed to limit the elastic indicator from moving up and popping out of the indicator hole. When the push rod drives the tripping rod to move, the locking plate drives the locking hole to separate from the locking block to release the locking fit.

[0024] In the above-mentioned N-pole module of the leakage circuit breaker, one end of the push rod member is sleeved on the round shaft end of the rotating shaft I, and the other end thereof is provided with a plate surface extending along the axial direction of the trip rod, and the locking plate is connected to the side wall of the round shaft end, and the locking plate and the push rod member are extended in the back direction, and when the elastic indicator member moves up and pops out the indicator hole, it drives the locking block to be opposite to the upper end part of the locking plate.

[0025] In the above-mentioned N-pole module of the leakage circuit breaker, an inner cover plate is provided in the cavity in which the N-pole mechanism is installed in the shell, which separates the elastic indicator from the support frame up and down, and a partition space suitable for accommodating the second rod portion is formed between the inner cover plate and the partition plate, and the elastic indicator is movably arranged on the inner cover plate; the inner cover plate is extended and connected between the push rod member and the rotating shaft portion of the support frame, a first limit rod is provided on the inner cover plate, and a second limit rod is provided on the locking plate, and the reset spring is a torsion spring, and its two ends are respectively hooked on the first limit rod and the second limit rod.

[0026] The above-mentioned N-pole module of the leakage circuit breaker also includes an N-pole arc extinguishing chamber vertically arranged in the space below the N-pole moving contact, and two arc-striking plates relatively arranged on both sides of the N-pole arc extinguishing chamber, one of the arc-striking plates is formed by extending downward from the N-pole static contact, and the other arc-striking plate extends close to the N-pole moving contact and is electrically connected to the wiring terminal, so as to guide the arc generated by the N-pole moving contact and the N-pole static contact into the N-pole arc extinguishing chamber for arc extinguishing.

[0027] The technical solution of the present invention has the following advantages compared with the prior art:

[0028] 1. In the N-pole module of the leakage circuit breaker provided by the present invention, the N-pole mechanism is mainly composed of a support frame, an N-pole moving contact and an elastic pressure piece. The support frame and the N-pole moving contact form an elastic connection relationship through the elastic pressure piece, so that the connecting portion of the N-pole moving contact abuts against the limiting portion on the support frame to form a limiting fit. When the N-pole moving contact is driven by the support frame to contact the N-pole static contact, the support frame will overcome the elastic force of the elastic pressure piece and continue to rotate relative to the N-pole moving contact for a certain stroke, thereby driving the limiting portion and the connecting portion to separate to form a stroke gap. The stroke gap is the overtravel distance of the N-pole mechanism, ensuring that the overtravel of the N-pole mechanism is within a reasonable range. The N-pole moving contact is within the enclosure, and the elastic pressure piece is used to provide the required final pressure for the N-pole moving contact, so that the N-pole moving and static contacts maintain sufficient and reliable contact. The N-pole mechanism using the technical solution realizes the disconnection or connection of the N-pole line by linkage with the L-pole mechanism. Compared with the prior art, the installation of this N-pole mechanism only requires two rotating shafts, which simplifies the installation structure, has fewer installation parts, is convenient and quick to install, and is conducive to improving installation efficiency. The entire structure is also more compact, the mechanism has good stability, and the installation occupies a small space, which releases the installation space of the N-pole module, thereby saving costs, improving the N-pole breaking capacity of the leakage circuit breaker, and making it safer and more reliable to use.

[0029] 2. In the N-pole module of the leakage circuit breaker provided by the present invention, the N-pole moving contact and the support frame are arranged to rotate relative to each other, and the two are kept in a linked limit fit under the action of the elastic force applied by the elastic pressure piece. The rotation amplitude is larger and the structure is simpler, which is conducive to obtaining a larger contact overtravel and contact opening distance, improving the contact insulation characteristics and electrical life of the circuit breaker, and when the N-pole moving and static contacts are closed, the elastic pressure piece is squeezed by the support frame to store energy and provide a continuous and stable contact pressure for the N-pole moving contact. The N-pole moving contact used in this N-pole mechanism is the same as the L-pole moving contact, and the two can be used interchangeably, reducing material inventory and thus reducing costs.

[0030] 3. In the N-pole module of the leakage circuit breaker provided by the present invention, a rotating shaft II and a boss structure are provided on the supporting frame, and the elastic pressure piece is a torsion spring sleeved on the rotating shaft II. The first elastic foot of the torsion spring is abutted against the first limiting groove of the boss structure, and the second elastic foot is abutted against the second limiting groove on the back of the N-pole moving contact. Such installation plays a limiting installation role for the elastic pressure piece between the supporting frame and the N-pole moving contact to prevent the elastic pressure from loosening. Such limiting protrusion can be used as a limiting part and can be used in conjunction with the connecting part to form a limiting function, and can also serve as an installation limiting function for the elastic pressure piece. The structure is simple and the cooperation is reliable.

[0031] 4. In the N-pole module of the leakage circuit breaker provided by the present invention, the N-pole moving contact includes a rotating part rotatably sleeved on the rotating shaft II, the connecting part is a protruding stopper formed on the arc edge of the rotating part, and the corresponding limiting part is a limiting stopper surface arranged on the boss structure and facing the connecting part. This structural arrangement enables the N-pole moving contact to drive the connecting part to rotate and abut against the limiting part to form a limiting fit under the elastic force of the elastic pressure piece. At this time, the support frame can synchronously drive the N-pole moving contact to reciprocate, and the motion and force are transmitted between the N-pole moving contact and the support frame through the elastic pressure piece, thereby providing a final pressure when the N-pole moving contact contacts the static contact, thereby realizing the connection and disconnection operations of the N-pole of the leakage circuit breaker.

[0032] 5. In the N-pole module of the leakage circuit breaker provided by the present invention, the support frame includes a first rod portion and a second rod portion extending at an angle to each other with the rotating shaft portion as the center, the rotating shaft I is passed through the rotating shaft portion, the rotating shaft II is formed on the first rod portion, and the linkage shaft is arranged on the second rod portion. Since the distance L1 from the linkage shaft to the rotating shaft I is greater than the distance L2 from the rotating shaft II to the rotating shaft I, the force value of the linkage shaft driving the N-pole moving contact to rotate through the support frame is reduced, thereby improving the unlocking reaction speed of the linkage between the N-pole and L-pole of the leakage circuit breaker, and improving the short-circuit breaking capacity of the circuit breaker. Such a design increases the linkage reliability between the L-pole mechanism and the N-pole mechanism of the leakage circuit breaker, and improves the service life and performance of the product.

[0033] 6. In the N-pole module of the leakage circuit breaker provided by the present invention, when the leakage circuit breaker is in normal working state, the elastic indicator is inserted into the locking hole of the locking plate through the locking block to form a locking configuration. At this time, the elastic indicator is restricted from popping out of the indicator hole on the top of the shell. When the pushing member is driven by the leakage releaser to rotate, it will drive the locking plate to rotate away from the locking block, so that the locking block is disengaged from the locking hole and unlocked. At this time, the elastic indicator will elastically move up and expose itself from the indicator hole, thereby reminding the user that a leakage fault has occurred.

[0034] 7. In the N-pole module of the leakage circuit breaker provided by the present invention, when the elastic indicator is not reset, the locking plate is blocked by the locking block, which causes the push member to be unable to be completely reset and restricts the closing movement of the trip rod, causing the trip rod to be in a sliding buckle state, that is, the L-pole mechanism slide buckle cannot perform the closing operation, thereby restricting the leakage circuit breaker from normal closing operation. Only after the leakage fault is eliminated, the elastic indicator is pressed again, so that the push member no longer restricts the movement of the trip rod after resetting, and the leakage circuit breaker then resumes normal opening and closing operations.

[0035] 8. In the N-pole module of the leakage circuit breaker provided by the present invention, an inner cover plate is provided in the shell to separate the elastic indicator and the support frame up and down, and a partition space suitable for accommodating the second rod portion is formed between the inner cover plate and the partition plate. Such a design can make full use of the internal space of the N-pole module to avoid position interference between the support frame and the elastic indicator, and can meet the installation requirements of the elastic indicator, thereby improving space utilization and alleviating the problem of difficult N-pole layout of the leakage circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the specific implementation of the present invention or the technical solution in the prior art, the drawings required for use in the specific implementation or the description of the prior art are briefly introduced below.

[0037] Figure 1 It is a schematic diagram of the planar structure of the N-pole module of the leakage circuit breaker of the present invention;

[0038] Figure 2 It is a schematic diagram of the internal structure of the N-pole module of the leakage circuit breaker of the present invention;

[0039] Figure 3 for Figure 2 The schematic diagram of the structure of the N-pole module of the residual current circuit breaker after the elastic indicator is hidden;

[0040] Figure 4 It is a structural schematic diagram of the N-pole mechanism and the leakage indication mechanism of the present invention;

[0041] Figure 5 It is a structural schematic diagram of the N-pole mechanism of the present invention;

[0042] Figure 6 It is a schematic cross-sectional structure diagram of the leakage circuit breaker of the present invention;

[0043] Figure 7 The figure is a schematic diagram of the structure of an N-pole mechanism in the prior art.

[0044] Description of the reference numerals: 1. housing; 11. partition; 12. inner cover; 13. first through hole; 14. second through hole; 15. first limit rod; 2. support frame; 20. limit part; 21. rotating shaft I; 22. rotating shaft II; 23. linkage shaft; 24. boss structure; 241. stop block; 25. rotating shaft; 26. first rod part; 27. second rod part; 28. first limit groove; 3. N-pole moving contact ; 30. Connecting part; 31. Second limiting groove; 4. N-pole static contact; 5. Elastic pressure piece; 6. Leakage tripping mechanism; 61. Leakage tripping device; 62. Driving rod; 63. Push rod; 631. Round shaft end; 632. Push plate; 64. Reset spring; 65. Tripping rod; 7. Elastic indicator; 71. Locking block; 8. Locking plate; 81. Locking hole; 82. Second limiting rod; 9. N-pole arc extinguishing chamber. DETAILED DESCRIPTION

[0045] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, 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 therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0047] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] Example

[0049] The leakage circuit breaker provided by the present invention comprises an N-pole module and an L-pole module arranged side by side, wherein the L-pole module comprises an L-pole mechanism, a magnetic tripping mechanism, a thermal tripping mechanism, an arc extinguishing system, an L-pole wiring assembly and a handle structure, wherein the L-pole mechanism is mainly composed of a contact support, a lock, a tripping, an L-pole moving contact and an L-pole static contact, and is combined with Figure 1-Figure 6 As shown, the N-pole module of the leakage circuit breaker provided in this embodiment includes an N-pole mechanism ( Figure 6 Where a represents an N-pole mechanism, b represents an L-pole mechanism), the N-pole mechanism includes:

[0050] The support frame 2 is rotatably disposed in the housing 1 via a rotating shaft Ⅰ 21, and the support frame 2 is linked with the L-pole mechanism via a linkage shaft 23;

[0051] The contact assembly comprises an N-pole moving contact 3 rotatably arranged on the support frame 2, and an N-pole stationary contact 4 fixed to the housing 1 and matched with the N-pole moving contact 3, a limiting structure is arranged between the N-pole moving contact 3 and the support frame 2, and the limiting structure comprises a connecting portion 30 arranged on the N-pole moving contact 3, and a limiting portion 20 arranged on the support frame 2 and located on the moving path of the connecting portion 30;

[0052] The elastic pressure piece 5 is arranged between the N-pole moving contact 3 and the support frame 2. The N-pole moving contact 3 and the support frame 2 are elastically connected through the elastic pressure piece 5, and the elastic force applied by the elastic pressure piece 5 drives the connecting part 30 and the limiting part 20 to abut against each other to form a limiting fit, so that the support frame 2 drives the N-pole moving contact 3 to perform opening and closing movements. When the support frame 2 drives the N-pole moving contact 3 to contact the N-pole static contact 4, it overcomes the elastic force and rotates a certain stroke relative to the N-pole moving contact 3 to drive the limiting part 20 to separate from the connecting part 30 to form a stroke gap. The spacing of the stroke gap is the over-travel distance of the N-pole mechanism, and the over-travel distance is 15%-50% of the contact opening distance.

[0053] The above implementation mode is the core technical solution of this embodiment. This N-pole mechanism is mainly composed of a support frame 2, an N-pole moving contact 3 and an elastic pressure piece 5. The support frame 2 and the N-pole moving contact 3 form an elastic connection relationship through the elastic pressure piece 5, so that the connecting portion 30 of the N-pole moving contact 3 abuts against the limiting portion 20 on the support frame 2 to form a limiting fit. When the N-pole moving contact 3 is driven by the support frame 2 to contact the N-pole static contact 4, the support frame 2 will overcome the elastic force of the elastic pressure piece 5 and continue to rotate a certain stroke relative to the N-pole moving contact 3, thereby driving the limiting portion 20 to separate from the connecting portion 30 to form a stroke gap. The stroke gap is the overtravel distance of the N-pole mechanism, ensuring The overtravel of the N-pole mechanism is within a reasonable range, and the elastic pressure piece 5 is used to provide the required final pressure for the N-pole moving contact 3, so that the N-pole moving and static contacts maintain sufficient and reliable contact. The N-pole mechanism using the present technical solution realizes the disconnection or connection of the N-pole line by linkage with the L-pole mechanism. Compared with the prior art, the installation of this N-pole mechanism only requires two rotating shafts, which simplifies the installation structure, reduces the number of installation parts, and is convenient and quick to install, which is conducive to improving the installation efficiency. The entire structure is also more compact, the mechanism has good stability, and the installation occupies a small space, which releases the installation space of the N-pole module, thereby saving costs, improving the N-pole breaking capacity of the leakage circuit breaker, and making it safer and more reliable to use.

[0054] According to the relative rotation arrangement between the N-pole moving contact 3 and the support frame 2, and the elastic force applied by the elastic pressure piece 5 keeps the two in a linked limit fit, the rotation amplitude is larger, the matching transmission is reliable, and the structure is simpler, which is conducive to obtaining a larger contact overtravel and contact opening distance, and improving the contact insulation characteristics and electrical life of the circuit breaker. It can be seen that the travel gap distance between the limit part 20 and the connecting part 30 determines the size of the overtravel distance, and when the N-pole moving and static contacts are in closing contact, the elastic pressure piece 5 is squeezed by the support frame 2 to store energy and provide a continuous and stable contact pressure for the N-pole moving contact. The N-pole moving contact and the L-pole moving contact used in this N-pole mechanism are the same, and the two can be used interchangeably, reducing material inventory and thus reducing costs.

[0055] Combination Figure 1-Figure 3 As shown, the support frame 2 is provided with a rotating shaft II 22 rotatably connected to the N-pole moving contact 3, the elastic pressure piece 5 is a torsion spring sleeved on the rotating shaft II 22, and has a first elastic foot extending and abutting against the support frame 2, and a second elastic foot extending and abutting against the back of the N-pole moving contact 3, the back of the N-pole moving contact 3 is the part facing away from the N-pole static contact 4, wherein the N-pole moving contact 3 includes a rotating part rotatably sleeved on the rotating shaft II 22, the connecting part 30 is a protruding stopper formed on the arc edge of the rotating part, and the limiting part 20 is a limiting stopper surface arranged on the support frame 2 and opposite to the protruding stopper. This structural arrangement enables the N-pole moving contact 3 to drive the connecting part 30 to rotate and abut against the limiting part 20 to form a limiting fit under the elastic force of the elastic pressure piece. At this time, the support frame 2 can synchronously drive the N-pole moving contact 3 to rotate back and forth, and the motion and force are transmitted between the N-pole moving contact 3 and the support frame 2 through the elastic pressure piece 5, thereby providing final pressure when the N-pole moving contact 3 contacts the N-pole static contact 4, thereby realizing the connection and disconnection operations of the N pole of the leakage circuit breaker.

[0056] For further optimization, refer to Figure 4-Figure 5 The support frame 2 includes a boss structure 24 vertically arranged between the rotating shaft I 21 and the rotating shaft II 22, and a first limiting groove 28 that cooperates with the first elastic foot is formed on the boss structure 24. The back of the N-pole moving contact 3 is provided with a second limiting groove 31 connected to the second elastic foot. The boss structure 24 includes two stop blocks 241 respectively arranged on the upper and lower sides of the first limiting groove 28. The boss structure 24 is provided with a limiting part 20 on the side facing the connecting part 30, that is, the limiting part 20 is a limiting stop surface arranged on one side of the boss structure 24. Such an installation plays a limiting installation role for the elastic pressure piece 5 between the support frame and the N-pole moving contact to prevent the elastic pressure piece from loosening. This boss structure can not only play an installation limiting role for the elastic pressure piece, but also can form a limiting cooperation with the connecting part 30 by setting the limiting part 20. It has a simple structure and reliable cooperation.

[0057] Combine the following Figure 3-Figure 5 The specific structure of the support frame is described in detail:

[0058] The support frame 2 includes a shaft portion 25 having a shaft I 21, and a first rod portion 26 and a second rod portion 27 extending at an angle to each other with the shaft portion 25 as the center. The shaft II 22 is integrally formed on the first rod portion 26, and the linkage shaft 23 is arranged on the second rod portion 27. The boss structure 24 is formed between the shaft portion 25 and the first rod portion 26. The shaft portion 25 is provided with an axial hole through which the shaft I 21 can pass. The shaft I 21 is fixed to the housing 1 after passing through the axial hole, so that the The support frame 2 rotates around the rotating shaft I21, and the distance L1 from the linkage shaft 23 to the rotating shaft I21 is greater than the distance L2 from the rotating shaft II22 to the rotating shaft I21, thereby reducing the force value of the linkage shaft 23 driving the N-pole moving contact 3 to rotate through the support frame 2, thereby improving the unlocking reaction speed of the linkage between the N-pole and L-pole of the leakage circuit breaker, and improving the short-circuit breaking capacity of the circuit breaker. This design increases the linkage reliability between the L-pole mechanism and the N-pole mechanism of the leakage circuit breaker, and improves the service life and performance of the product.

[0059] In order to realize the leakage protection function of the product, the N-pole module provided in this embodiment also includes a leakage detection component and a leakage tripping mechanism 6 arranged in the housing 1. The leakage detection component is mainly composed of a leakage circuit board and a magnetic ring. When the leakage detection component detects a leakage fault in the line, the leakage tripping mechanism 6 drives the L-pole mechanism to perform a tripping action. As a specific structural setting, combined with Figure 1-Figure 3 As shown, the leakage tripping mechanism 6 includes: a leakage tripper 61, a push rod 63, a tripping rod 65 and a reset spring 64, wherein the leakage tripper 61 has a driving rod 62 that moves back and forth; the push rod 63 is coaxially rotated with the support frame 2 and is arranged on the rotating shaft Ⅰ21, and extends to be arranged opposite to the driving rod 62, and the push rod 63 reciprocates between the driving rod 62 and the tripping rod 65, and the reset spring 64 is connected to the push rod 63 and applies an elastic force to the push rod 63 to swing away from the tripping rod 65. The tripping rod 65 is connected to the L pole. The lock of the mechanism is linked and extended on the movement path of the push rod 63. According to the L-pole mechanism, the lock and the tripping buckle form a locking match under normal conditions. When the tripping rod 65 is actuated, the lock and the tripping buckle are driven to trip and separate. The advantage of this design is that in the event of a leakage fault, the leakage release 61 pushes the push rod 63 to swing through the driving rod 62, and the tripping rod 65 is driven by the push rod 63 to rotate, thereby triggering the L-pole mechanism to perform a tripping and opening action, thereby realizing the tripping and opening of the leakage circuit breaker in the event of a leakage fault.

[0060] like Figure 6 As shown, the housing 1 includes two cavities for installing the N-pole mechanism and the L-pole mechanism respectively, and a partition 11 arranged between the two chambers, and the partition 11 is respectively provided with a first through hole 13 and a second through hole 14 for the linkage shaft 23 and the tripping rod 65 to pass through, and the linkage shaft 23 is connected to the contact support of the L-pole mechanism after passing through the first through hole 13. The first rod portion of the support frame 2 is arranged higher than the rotating shaft portion 25, and a movable space suitable for the movement of the tripping rod 65 is formed between the support frame 2 and the partition 11. The second rod portion 27 designed in this way makes way for the tripping rod 65 to avoid position interference between the two.

[0061] The N-pole module of this embodiment also includes a leakage indication structure arranged on the housing 1. Figure 2 and Figure 4 As shown, the leakage indication structure includes: an elastic indicator member 7 slidably arranged on the shell 1 and a locking assembly arranged between the elastic indicator member 7 and the push rod member 63, and an indication hole is opened at the top of the shell 1 for the elastic indicator member 7 to partially pop out, the locking assembly includes a locking block 71 arranged on one side of the elastic indicator member 7, and a locking plate 8 arranged on one end of the push rod member 63, the locking plate 8 is provided with a locking hole 81 for the locking block 71 to be inserted, and when the locking block 71 is inserted into the locking hole 81, a locking fit is formed to limit the elastic indicator member 7 from moving up to pop out of the indication hole. In addition, when the push rod member 63 drives the tripping rod 65 to move, the locking plate 8 drives the locking hole 81 to separate from the locking block 71 to release the locking fit, so that the elastic indicator member 7 can move up to pop out of the indication hole. The advantage of such a design is that, when the leakage circuit breaker is in normal working state, the elastic indicator 7 is inserted into the locking hole 81 of the locking plate 8 through the locking block 71 to form a locking configuration, and the elastic indicator 7 is restricted from popping out of the indicator hole on the top of the housing 1; when the pusher is driven by the leakage releaser 61 to rotate, it will drive the locking plate 8 to rotate away from the locking block 71, so that the locking block 71 is disengaged from the locking hole 81 and unlocked, and the elastic indicator 7 will elastically move up to be exposed in the indicator hole, thereby reminding the user of the leakage fault.

[0062] Further preferably, in combination with Figure 1-Figure 3As shown, one end of the push rod member 63 is a round shaft end 631 sleeved on the rotating shaft Ⅰ21, and the other end thereof is provided with a push plate 632, and the push plate 632 extends along the axial direction of the tripping rod for a set distance. Since the driving rod 62 and the tripping rod 65 are staggered up and down, such a design can increase the height of the push plate 632, so that one side of the push plate 632 is opposite to the driving rod 62, and the other side thereof can also be opposite to the tripping rod 65, thereby ensuring that the push plate cooperates to transmit movement between the driving rod and the tripping rod, and the locking plate 8 is connected to the side wall of the round shaft end 631, and the locking plate 8 and the push rod member 63 are extended in the back direction, and the elastic indicator 7 moves up and pops out. When the indicator hole is opened, the locking block 71 is driven to be opposite to the upper end portion of the locking plate 8. With this structural arrangement, when the elastic indicator 7 pops out from the top of the shell, since the locking plate 8 is blocked by the locking block 71, the pushing member cannot be completely reset and the closing movement of the trip rod 65 is restricted, causing the trip rod 65 to be in a sliding state all the time, that is, the L-pole mechanism slides and cannot be closed. This restricts the leakage circuit breaker from normal closing operation. Only by pressing the elastic indicator 7 again after the leakage fault is eliminated can the pushing member be reset and no longer restrict the movement of the trip rod 65. At this time, the leakage circuit breaker resumes normal opening and closing operations.

[0063] like Figure 2 As shown, the housing 1 is provided with an inner cover plate 12 in the cavity in which the N-pole mechanism is installed, which separates the elastic indicator 7 from the support frame 2 up and down, and a partition space suitable for accommodating the second rod portion 27 is formed between the inner cover plate 12 and the partition plate 11, and the elastic indicator 7 is movably arranged on the inner cover plate 12, which includes an indicator body and an indicator spring arranged in a groove at the bottom of the indicator body, and a stopper limited at one end of the indicator spring is provided on the partition plate 11. This design of the inner cover plate 12 can make full use of the internal space of the N-pole module to avoid position interference between the support frame 2 and the elastic indicator 7, and can meet the installation requirements of the elastic indicator 7, thereby improving space utilization and improving the problem of difficult N-pole layout of the leakage circuit breaker. It is further preferred that a first limit rod 15 is provided on the inner cover plate 12, a second limit rod 82 is provided on the locking plate 8, the reset spring 64 is a reset torsion spring, and its two ends are respectively hooked on the first limit rod 15 and the second limit rod 82, and the function of the reset spring 64 is to realize the reset function of the push rod member 63, and the inner cover plate 12 extends and is connected between the push rod member 63 and the rotating shaft portion 25 of the support frame 2, so that the cylindrical end of the push rod member 63 is separated from the rotating shaft portion 25 of the support frame 2 up and down. Although the push rod member 63 and the support frame 2 are coaxially sleeved on the rotating shaft Ⅰ21, this design allows the rotational movements of the two to be non-interfering with each other, thereby ensuring the stability of the independent rotation of the push rod member and the support frame to avoid accidental touching between the push rod member and the support frame.

[0064] The N-pole module of the leakage circuit breaker of the present invention also includes an N-pole arc extinguishing chamber 9 vertically arranged in the space below the N-pole moving contact 3, and two arc-striking plates relatively arranged on both sides of the N-pole arc extinguishing chamber 9, one of the arc-striking plates is formed by extending downward from the N-pole static contact 4, and the other arc-striking plate extends close to the N-pole moving contact 3 and is electrically connected to the wiring terminal, so as to guide the arc generated by the N-pole moving contact 3 and the N-pole static contact 4 into the N-pole arc extinguishing chamber 9 for arc extinguishing, so as to avoid burning of the contacts, improve the breaking capacity of the circuit breaker, and greatly improve the service life of the product.

[0065] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the present invention.

Claims

1. An N-pole module of a leakage circuit breaker, comprising an N-pole mechanism arranged in a housing (1) and forming a linkage with an L-pole mechanism, characterized in that: The N-pole mechanism comprises: A support frame (2) is rotatably disposed in the housing (1) via a rotating shaft I (21); the support frame (2) is linked to the L-pole mechanism via a linkage shaft (23); A contact assembly, comprising an N-pole moving contact (3) rotatably arranged on the support frame (2), and an N-pole stationary contact (4) fixed to the housing (1) and cooperating with the N-pole moving contact (3), a limiting structure being arranged between the N-pole moving contact (3) and the support frame (2), the limiting structure comprising a connecting portion (30) arranged on the N-pole moving contact (3), and a limiting portion (20) arranged on the support frame (2) and located on the moving path of the connecting portion (30); The elastic pressure piece (5) is arranged between the N-pole moving contact (3) and the support frame (2); the N-pole moving contact (3) and the support frame (2) are elastically connected via the elastic pressure piece (5); and under the action of the elastic force applied by the elastic pressure piece (5), the two drive the connecting part (30) and the limiting part (20) to abut against each other to form a limiting fit; when the supporting frame (2) drives the N-pole moving contact (3) to contact the N-pole static contact (4), it overcomes the elastic force and rotates relative to the N-pole moving contact for a certain stroke, so as to drive the limiting part (20) and the connecting part (30) to separate to form a stroke gap; The invention also comprises a leakage tripping mechanism (6) arranged on the housing (1) for driving the L-pole mechanism to trip, the leakage tripping mechanism (6) comprising: a leakage tripping device (61), a push rod (63), a tripping rod (65) and a reset spring (64), wherein the leakage tripping device (61) has a driving rod (62) that can move back and forth; the push rod (63) is coaxially rotatable with the support frame (2) and arranged on the rotating shaft I (21), and is extended to be arranged opposite to the driving rod (62); the tripping rod (65) is linked with the lock of the L-pole mechanism and is extended to be arranged on the movement path of the push rod (63), and the push rod (63) swings back and forth between the driving rod (62) and the tripping rod (65); the reset spring (64) is connected to the push rod (63) and applies an elastic force to the push rod (63) to swing to a side away from the tripping rod (65); The housing (1) is provided with a leakage indication structure, and the leakage indication structure comprises: An elastic indicator (7) is slidably disposed on the housing (1), and a indicating hole is provided on the top of the housing for partially ejecting the elastic indicator (7); A locking assembly is arranged between the elastic indicator (7) and the push rod (63), comprising a locking block (71) arranged on one side of the elastic indicator (7), and a locking plate (8) arranged on one end of the push rod (63), wherein the locking plate (8) is provided with a locking hole (81) for the locking block (71) to be inserted, and when the locking block (71) is inserted into the locking hole (81), a locking fit is formed to restrict the elastic indicator (7) from moving upward and popping out of the indicator hole; One end of the push rod (63) is a round shaft end (631) sleeved on the rotating shaft I (21), and the other end is provided with a push plate (632). The locking plate (8) is connected to the side wall of the round shaft end (631). The locking plate (8) and the push rod (63) are arranged to extend in opposite directions. When the elastic indicator (7) moves upward and pops out of the indicator hole, it drives the locking block (71) to face the upper end of the locking plate (8).

2. According to claim 1, a leakage circuit breaker N-pole module, characterized in that: The spacing of the travel gap is the overtravel distance of the N-pole mechanism, and the overtravel distance is 15%-50% of the contact opening distance.

3. According to claim 1, a leakage circuit breaker N-pole module, characterized in that: The support frame (2) is provided with a rotating shaft II (22) rotatably connected to the N-pole moving contact (3); the elastic pressure piece (5) is a torsion spring sleeved on the rotating shaft II (22) and has a first elastic foot extending and abutting against the support frame (2), and a second elastic foot extending and abutting against the back of the N-pole moving contact (3).

4. According to claim 3, a leakage circuit breaker N-pole module is characterized in that: The N-pole moving contact (3) comprises a rotating part rotatably sleeved on a rotating shaft II (22), the connecting part (30) is a protruding stopper formed on the arc edge of the rotating part, and the limiting part (20) is a limiting stopper surface arranged on the supporting frame (2) and opposite to the protruding stopper.

5. The N-pole module of a leakage circuit breaker according to claim 3, characterized in that: The support frame (2) includes a boss structure (24) vertically arranged between the rotating shaft I (21) and the rotating shaft II (22); a first limiting groove (28) is formed on the boss structure (24) and is matched with the first elastic foot; a second limiting groove (31) connected to the second elastic foot is provided on the back of the N-pole moving contact (3); the boss structure (24) includes two stop blocks (241) respectively arranged on the upper and lower sides of the first limiting groove (28); and a limiting portion (20) is provided on the side of the boss structure (24) facing the connecting portion (30).

6. A leakage circuit breaker N-pole module according to any one of claims 1 to 5, characterized in that: The support frame (2) comprises a rotating shaft portion (25) provided with a rotating shaft I (21), and a first rod portion (26) and a second rod portion (27) extending at an angle to each other with the rotating shaft portion (25) as the center, the first rod portion (26) being formed with a rotating shaft II (22), the linkage shaft (23) being arranged on the second rod portion (27), and the rotating shaft portion (25) being provided with an axial hole through which the rotating shaft I (21) can pass.

7. The N-pole module of a leakage circuit breaker according to claim 6, characterized in that: The rotating shaft I (21) passes through the shaft hole and is fixed to the housing (1), the supporting frame (2) rotates around the rotating shaft I (21), and the distance L1 from the linkage shaft (23) to the rotating shaft I (21) is greater than the distance L2 from the rotating shaft II (22) to the rotating shaft I (21).

8. The N-pole module of a leakage circuit breaker according to claim 1, characterized in that: The housing (1) comprises two cavities for mounting an N-pole mechanism and an L-pole mechanism respectively, and a partition (11) arranged between the two cavities, wherein the partition (11) is provided with a first through hole (13) and a second through hole (14) for allowing a linkage shaft (23) and a tripping rod (65) to pass through respectively; the first rod portion (26) of the support frame (2) is arranged higher than the rotating shaft portion (25), and a movable space suitable for the movement of the tripping rod (65) is formed between the first rod portion (26) and the partition (11).

9. The N-pole module of a leakage circuit breaker according to claim 8, characterized in that: The shell (1) is provided with an inner cover plate (12) in the cavity in which the N-pole mechanism is installed, which separates the elastic indicator (7) from the support frame (2) up and down; a partition space suitable for accommodating the second rod portion (27) is formed between the inner cover plate (12) and the partition plate (11); the elastic indicator (7) is movably arranged on the inner cover plate (12); the inner cover plate (12) is extended and connected between the push rod (63) and the rotating shaft portion (25) of the support frame (2); a first limiting rod (15) is provided on the inner cover plate (12); a second limiting rod (82) is provided on the locking plate (8); the reset spring (64) is a reset torsion spring, and its two ends are respectively hooked on the first limiting rod (15) and the second limiting rod (82).

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