Shunt tripping mechanism and circuit breaker

Abstract

The utility model relates to a shunt tripping mechanism and a circuit breaker. The shunt tripping mechanism comprises a mounting piece; the shunt release is mounted on the mounting piece and is provided with a shunt release push rod for realizing shunt release; the auxiliary ejector rod is movably mounted on the mounting piece; the shunt tripping push rod of the shunt tripping device can move to a movable path of the auxiliary push rod when shunt tripping is carried out, and the auxiliary push rod moves relative to the installation part to abut against the shunt tripping push rod, so that the shunt tripping push rod is reset. In the shunt tripping process of the shunt tripping mechanism, the auxiliary ejector rod can enable the shunt tripping push rod to reset, and compared with a shunt tripping mechanism in the prior art, the shunt tripping mechanism has the advantages that the reset effect of shunt tripping is ensured, so that the use reliability of the mechanism is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a shunt tripping mechanism and a circuit breaker. Background Art

[0002] A circuit breaker is a switch device that can close, carry and disconnect current under normal circuit conditions and can close, carry and disconnect current under abnormal circuit conditions within a specified time. The circuit breakers in the prior art have the following problems: when the push rod in the shunt trip mechanism pulls the traction rod of the circuit breaker to open the circuit breaker, the push rod often cannot be reset, thereby reducing the reliability of the mechanism. Utility Model Content

[0003] Based on this, it is necessary to provide a shunt trip mechanism and a circuit breaker that can ensure the reset effect of the push rod in order to solve the problem that the push rod of the shunt trip mechanism in the traditional circuit breaker often cannot be reset.

[0004] A shunt tripping mechanism, comprising:

[0005] Mounting parts;

[0006] A shunt release is mounted on the mounting member and has a shunt release push rod for achieving shunt release;

[0007] An auxiliary push rod is movably mounted on the mounting piece; the shunt trip push rod of the shunt releaser can move to the movable path of the auxiliary push rod when the shunt trip is performed, and the auxiliary push rod moves relative to the mounting piece to push against the shunt trip push rod, so that the shunt trip push rod is reset.

[0008] In one embodiment, the shunt tripping mechanism further includes:

[0009] A shunt trip power switch is mounted on the mounting member, and the contact of the shunt trip power switch is located on the movable path of the auxiliary push rod; when the shunt trip push rod of the shunt release performs shunt tripping, the auxiliary push rod moves relative to the mounting member to trigger the shunt trip power switch, causing the shunt release to lose power.

[0010] In one of the embodiments, the auxiliary push rod is provided with a first inclined surface, the first inclined surface is arranged toward the shunt trip push rod, and the auxiliary push rod presses against the shunt trip push rod through the first inclined surface.

[0011] In one of the embodiments, the shunt trip mechanism further includes a first elastic reset member, which is disposed between the auxiliary push rod and the mounting member; when the auxiliary push rod abuts against the shunt trip push rod, the first elastic reset member deforms and stores energy.

[0012] In one embodiment, the mounting member includes a mounting plate and a cover, the mounting plate is mounted on the cover and the two together form a mounting space;

[0013] The shunt release is installed on the housing and is located in the installation space. The shunt release push rod of the shunt release extends through the installation space. The auxiliary push rod is installed outside the housing and partially extends into the installation space.

[0014] A circuit breaker comprises the above-mentioned shunt tripping mechanism.

[0015] In the above-mentioned shunt tripping mechanism and circuit breaker, when the shunt tripping push rod of the shunt tripping device applies a force to the traction rod, the traction rod rotates, and the traction rod drives the moving contact mechanism to move through the operating mechanism so that the moving contact is separated from the static contact to achieve the process of opening the circuit breaker, the moving contact mechanism applies a force to the auxiliary push rod, and the auxiliary push rod resets the shunt tripping push rod. That is, when the shunt tripping mechanism is in the process of shunt tripping, the auxiliary push rod can reset the shunt tripping push rod, which ensures the resetting effect of the shunt tripping compared to the shunt tripping mechanism in the prior art, thereby improving the reliability of the mechanism.

[0016] In one embodiment, the circuit breaker further includes an operating mechanism, and the shunt tripping mechanism further includes:

[0017] An alarm push rod, movably mounted on the mounting member;

[0018] An alarm micro switch is mounted on the mounting member, wherein the contact of the alarm micro switch is located on the movable path of the alarm push rod, and when the shunt trip push rod of the shunt release performs shunt tripping, the alarm push rod can be pushed against by the operating mechanism and move relative to the mounting member to trigger the alarm micro switch;

[0019] A second elastic reset member is disposed between the alarm push rod and the mounting member; when the alarm push rod triggers the alarm micro switch, the second elastic reset member deforms and stores energy.

[0020] In one of the embodiments, the circuit breaker further includes a static contact mechanism and a moving contact mechanism;

[0021] The shunt trip push rod of the shunt releaser can move relative to the mounting piece to the movable path of the auxiliary push rod, and the movement of the shunt trip push rod can pull the traction rod, so that the moving contact of the moving contact mechanism and the static contact of the static contact mechanism of the circuit breaker are abnormally opened, the moving contact mechanism moves relative to the static contact mechanism, and the movement of the moving contact mechanism can push against the auxiliary push rod, so that the auxiliary push rod moves relative to the mounting piece to push against the shunt trip push rod, so that the shunt trip push rod is reset.

[0022] In one embodiment, the shunt tripping mechanism further includes:

[0023] A shunt trip power switch mounted on the mounting member, wherein the contact of the shunt trip power switch is located on the movable path of the auxiliary push rod;

[0024] When the moving contact and the static contact of the circuit breaker are normally or abnormally opened, the moving contact mechanism can move relative to the static contact mechanism, and the movement of the moving contact mechanism can abut against the auxiliary push rod to make it move relative to the mounting member, so as to trigger the shunt trip power switch, and the shunt tripper loses power;

[0025] When the moving contact and the static contact of the circuit breaker are closed, the shunt trip power switch is released by the auxiliary push rod, and the shunt release is energized.

[0026] In one embodiment, the shunt tripping mechanism further includes:

[0027] Alarm micro switches are all installed on the mounting parts;

[0028] An alarm push rod, movably mounted on the mounting member;

[0029] When the moving contact and the static contact of the circuit breaker are abnormally opened, the operating mechanism of the circuit breaker can push against the alarm push rod to make it move relative to the mounting part to trigger the alarm micro switch; when the moving contact and the static contact of the circuit breaker are closed and opened normally, the alarm micro switch is released by the alarm push rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A structural diagram of a circuit breaker provided in one embodiment of the present application;

[0031] Figure 2 for Figure 1 The assembly drawing of the shunt tripping mechanism of the circuit breaker shown in;

[0032] Figure 3 for Figure 2An exploded view of the shunt trip mechanism shown in ;

[0033] Figure 4 for Figure 2 An assembly diagram of the shunt trip mechanism from another perspective shown in ;

[0034] Figure 5 for Figure 2 Another exploded view of the shunt trip mechanism shown in ;

[0035] Figure 6 for Figure 2 Another exploded view of the shunt trip mechanism shown in ;

[0036] Figure 7 for Figure 2 An assembly diagram of the shunt trip mechanism shown in another perspective;

[0037] Figure 8 for Figure 1 A structural diagram of the circuit breaker from another perspective shown in FIG.

[0038] Description of reference numerals:

[0039] 1000, circuit breaker; 100, shunt tripping mechanism; 10, mounting member; 11, mounting plate; 111, second positioning hole; 12, cover; 121, positioning groove; 122, first positioning column; 123, second positioning column; 124, third positioning column; 20, shunt tripping device; 21, shunt tripping push rod; 211, matching inclined surface; 30, shunt tripping power switch; 31, first positioning hole; 40, auxiliary push rod; 41, first inclined surface; 42. second inclined plane; 50. first elastic reset member; 60. opening indication switch; 70. alarm push rod; 71. third positioning hole; 80. alarm micro switch; 90. second elastic reset member; 110. wiring terminal; 200. moving contact mechanism; 201. moving contact; 202. rotating shaft; 300. stationary contact mechanism; 301. stationary contact; 400. operating mechanism; 4001. first rod; 401. traction rod; 500. operating handle. DETAILED DESCRIPTION

[0040] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0043] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0045] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0046] See also Figure 1 An embodiment of the present application provides a circuit breaker 1000, and the circuit breaker 1000 includes a static contact mechanism 300, a moving contact mechanism 200 and a shunt trip mechanism 100. The static contact mechanism 300 includes a static contact 301, and the moving contact mechanism 200 includes a moving contact 201. The shunt trip mechanism 100 is an accessory for remote operation of the tripping switch, that is, when the shunt trip mechanism 100 receives an external tripping signal, it can separate the moving contact 201 from the static contact 301, and the circuit breaker 1000 is in an abnormal tripping state. Optionally, the circuit breaker 1000 also includes an operating mechanism 400 and a traction rod 401, the moving contact mechanism 200 is connected to the operating mechanism 400, and the traction rod 401 is arranged in cooperation with the operating mechanism 400. The shunt tripping mechanism 100 can drive the operating mechanism 400 to move through the traction rod 401 , and the operating mechanism 400 drives the moving contact mechanism 200 to move, so that the moving contact 201 of the moving contact mechanism 200 is separated from the static contact 301 of the static contact mechanism 300 .

[0047] It should be noted that, in addition to the above-mentioned abnormal opening state, the circuit breaker 1000 also has a closing state and a normal opening state. When the circuit breaker 1000 is in the closing state, the moving contact 201 is in contact with the static contact 301. When the circuit breaker 1000 is in the normal opening state, the moving contact 201 is separated from the static contact 301. By manually operating the operating handle 500 of the circuit breaker 1000, the operating handle 500 drives the moving contact 201 to move through the operating mechanism 400, so that the moving contact 201 is in contact with or separated from the static contact 301, thereby switching the circuit breaker 1000 between the closing state and the normal opening state.

[0048] See also Figure 2-Figure 4 The shunt tripping mechanism 100 includes a mounting member 10, a shunt release 20, and an auxiliary push rod 40. The shunt release 20 is mounted on the mounting member 10 and has a shunt tripping push rod 21 for realizing shunt tripping. The auxiliary push rod 40 is movably mounted on the mounting member 10. The shunt tripping push rod 21 of the shunt release 20 can move to the movable path of the auxiliary push rod 40 when performing shunt tripping. The auxiliary push rod 40 moves relative to the mounting member 10 to push against the shunt tripping push rod 21, so that the shunt tripping push rod 21 is reset.

[0049] Specifically, when the shunt trip push rod 21 of the shunt release 20 performs shunt tripping, the shunt trip push rod 21 can move relative to the mounting member 10 and pull the traction rod 401, so that the moving contact mechanism 200 moves relative to the static contact mechanism 300, and the moving contact 201 is separated from the static contact 301. In the process of separation of the moving contact 201 from the static contact 301, the moving contact mechanism 200 contacts and abuts against the auxiliary push rod 40. The auxiliary push rod 40 moves relative to the mounting member 10, and since the shunt trip push rod 21 can move to the active path of the auxiliary push rod 40, the auxiliary push rod 40 can abut against the shunt trip push rod 21 in the process of moving relative to the mounting member 10, so that the shunt trip push rod 21 is reset.

[0050] Optionally, the moving contact mechanism 200 includes a rotating shaft 202, the moving contact 201 is installed on the rotating shaft 202, the operating mechanism 400 can drive the rotating shaft 202 to move relative to the stationary contact mechanism 300, and the rotating shaft 202 can contact the auxiliary push rod 40 to make the auxiliary push rod 40 move relative to the mounting member 10.

[0051] In the circuit breaker 1000 provided in the embodiment of the present application, when the shunt trip push rod 21 of the shunt release 20 applies a force to the traction rod 401, the traction rod 401 rotates, and the traction rod 401 drives the moving contact mechanism 200 to move through the operating mechanism 400 so that the moving contact 201 is separated from the static contact 301 to realize the opening, the moving contact mechanism 200 applies a force to the auxiliary push rod 40, and the auxiliary push rod 40 resets the shunt trip push rod 21. That is, when the shunt trip mechanism 100 is performing shunt tripping, the auxiliary push rod 40 can reset the shunt trip push rod 21, which ensures the reset effect of the shunt tripping compared to the shunt trip mechanism 100 in the prior art, thereby improving the reliability of the mechanism.

[0052] It should be noted that other structural arrangements of the shunt release 20 may refer to solutions in the prior art and will not be described in detail here.

[0053] In some embodiments, the shunt trip mechanism 100 further includes a shunt trip power switch 30, which is mounted on the mounting member 10, and the contact of the shunt trip power switch 30 is located on the movable path of the auxiliary top rod 40. When the shunt trip push rod 21 of the shunt release 20 performs shunt tripping, the rotating shaft 202 of the moving contact mechanism 200 can contact the auxiliary top rod 40, and the auxiliary top rod 40 moves relative to the mounting member 10 to trigger the shunt trip power switch 30, so that the shunt release 20 loses power. That is, when the circuit breaker is in an abnormal opening state, the shunt release 20 will lose power.

[0054] It should be noted that when the circuit breaker is in the normal open state, the auxiliary top rod 40 will also trigger the shunt trip power switch 30, causing the shunt release 20 to lose power. When the circuit breaker is in the closed state, the auxiliary top rod 40 releases the shunt trip power switch 30, and the shunt release 20 is powered.

[0055] In some embodiments, see Figure 5 The mounting member 10 includes a mounting plate 11 and a housing 12. The mounting plate 11 is mounted on the housing 12 and the two together form an installation space. The shunt release 20 and the shunt release power switch 30 are both mounted on the housing 12 and are both located in the installation space. The shunt release push rod 21 of the shunt release 20 extends through the installation space, and the auxiliary push rod 40 is mounted outside the housing 12 and partially extends into the installation space. Since most of the shunt release 20 and the shunt release power switch 30 are installed in the installation space, the mounting member 10 plays a role in protecting the shunt release 20 and the shunt release power switch 30.

[0056] Optionally, a positioning groove 121 is provided in the housing 12, and the shape of the positioning groove 121 is conformed to the shape of the shunt release 20, and the shunt release 20 is installed and fixed in the positioning groove 121. The shunt release power switch 30 is installed and fixed with the first positioning column 122 on the housing 12 through its first positioning hole 31. Specifically, the shunt release power switch 30 has two first positioning holes 31, and the housing 12 has two first positioning columns 122, and the two first positioning holes 31 cooperate with the two first positioning columns 122. The mounting plate 11 is installed and fixed with the second positioning column 123 on the housing 12 through its second positioning hole 111. Specifically, the mounting plate 11 has two second positioning holes 111, and the housing 12 has two second positioning columns 123, and the two second positioning holes 111 cooperate with the two second positioning columns 123.

[0057] The auxiliary push rod 40 is slidably connected to the housing 12. When the movable contact mechanism 200 abuts against the auxiliary push rod 40, the auxiliary push rod 40 can slide relative to the housing 12. Of course, in some other embodiments, the auxiliary push rod 40 can also be arranged to rotate relative to the housing 12, which is not limited here.

[0058] In some embodiments, see Figure 3 , the auxiliary push rod 40 is provided with a first inclined surface 41, the first inclined surface 41 is arranged toward the shunt trip push rod 21, and the auxiliary push rod 40 pushes against the shunt trip push rod 21 through the first inclined surface 41. Generally, the movement direction of the shunt trip push rod 21 relative to the mounting member 10 intersects with, specifically, is perpendicular to, the movement direction of the auxiliary push rod 40 relative to the mounting member 10, and by providing the first inclined surface 41, when the auxiliary push rod 40 moves relative to the mounting member 10 along the first direction, the shunt trip push rod 21 can be moved relative to the mounting member 10 along the second direction to reset.

[0059] Furthermore, in order to cooperate with the auxiliary push rod 40, a matching inclined surface 211 is provided on the shunt trip push rod 21, and the matching inclined surface 211 is matched with the first inclined surface 41, so that the auxiliary push rod 40 can push the shunt trip push rod 21 to reset.

[0060] See also Figure 6 , the shunt trip mechanism 100 also includes a first elastic reset member 50, which is disposed between the auxiliary push rod 40 and the housing 12. When the auxiliary push rod 40 pushes against the shunt trip push rod 21, the first elastic reset member 50 deforms and stores energy. The auxiliary push rod 40 can be reset relative to the housing 12 under the action of the first elastic reset member 50. Optionally, the first elastic reset member 50 is a spring. It should be understood that in some other embodiments, the type of the first elastic reset member 50 is not limited, as long as the purpose of resetting the auxiliary push rod 40 can be achieved.

[0061] Optionally, the first elastic reset member 50 is disposed outside the housing 12, and a limiting column is disposed on both the housing 12 and the auxiliary ejector rod 40. During assembly, the first elastic reset member 50 is disposed between the housing 12 and the auxiliary ejector rod 40, and the limiting columns of the housing 12 and the auxiliary ejector rod 40 are both penetrated into the first elastic reset member 50 to limit the first elastic reset member 50, so as to prevent the first elastic reset member 50 from shifting when the auxiliary ejector rod 40 moves relative to the housing 12.

[0062] In some embodiments, continue to refer to Figure 6 The shunt tripping mechanism 100 further includes an opening indication switch 60, which is mounted on the mounting plate 11 and accommodated in the mounting space. The contact of the opening indication switch 60 is located on the movable path of the auxiliary push rod 40, and the auxiliary push rod 40 is used to trigger the opening indication switch 60. In this way, when the shunt release 20 performs shunt tripping, the moving contact mechanism 200 rotates relative to the static contact mechanism 300, the rotating shaft 202 of the moving contact mechanism 200 abuts against the auxiliary push rod 40, and the auxiliary push rod 40 moves relative to the cover 12 to contact the opening indication switch 60, and the opening indication switch 60 sends a signal.

[0063] It should be noted here that when the circuit breaker 1000 is in a normal opening state and an abnormal opening state, the rotating shaft 202 will also abut against the auxiliary push rod 40, and the auxiliary push rod 40 will trigger the opening indication switch 60 and the shunt trip power switch 30. At this time, the opening indication switch 60 sends a signal, and the shunt trip 20 loses power.

[0064] Furthermore, the opening indication switch 60 is mounted on the mounting member 10 . A second inclined surface 42 is disposed on the auxiliary push rod 40 , and the second inclined surface 42 is disposed toward the opening indication switch 60 . The auxiliary push rod 40 triggers the opening indication switch 60 through the second inclined surface 42 .

[0065] Of course, in some other embodiments, the auxiliary push rod 40 may also omit the second inclined surface 42 , and directly trigger the opening indication switch 60 by the end surface of the auxiliary push rod 40 facing the opening indication switch 60 , which is not limited here.

[0066] In some embodiments, there are two opening indicating switches 60, which are arranged at two sides of the opening indicating switch 60 at intervals, and both opening indicating switches 60 are located on the movable path of the auxiliary push rod 40. In this way, when the number of opening indicating switches 60 is small, the auxiliary effect is guaranteed.

[0067] It should be noted that, when there are two opening indicating switches 60 , two second inclined surfaces 42 are provided on the auxiliary push rod 40 , and the two second inclined surfaces 42 are respectively used to trigger the contacts of the opening indicating switches 60 .

[0068] Of course, in some other embodiments, the number of the opening indicating switches 60 is not limited. For example, the number of the opening indicating switches 60 may be one or more than two.

[0069] In some embodiments, see Figure 6 and Figure 7 , the shunt tripping mechanism 100 also includes an alarm push rod 70 and an alarm micro switch 80. The alarm push rod 70 is movably mounted on the mounting member 10, specifically, the alarm push rod 70 is movably mounted on the cover 12. The alarm micro switch 80 is also mounted on the mounting member 10, specifically, the alarm micro switch 80 is mounted on the mounting plate 11. The contact of the alarm micro switch 80 is located on the movable path of the alarm push rod 70, and the alarm push rod 70 is used to trigger the alarm micro switch 80. In this arrangement, when the circuit breaker 1000 is in an abnormal opening state, the operating mechanism 400 contacts the alarm push rod 70 through the first rod 4001 (see Figure 8 ), the alarm push rod 70 moves relative to the mounting member 10 to trigger the alarm micro switch 80, and the alarm micro switch 80 sends a signal alarm.

[0070] It should be noted that when the circuit breaker 1000 is closed or opened normally, the moving contact mechanism 200 does not contact the alarm push rod 70, the alarm push rod 70 does not move relative to the mounting member 10, and the alarm micro switch 80 does not get triggered.

[0071] The above-mentioned shunt trip mechanism 100 integrates the shunt release 20, the shunt trip power switch 30, the opening indication switch 60 and the alarm micro switch 80 into one, so that the accessories can realize the shunt trip, opening indication and alarm functions. Each function is centrally installed on the same mounting part 10, so that the various structures of the shunt trip are installed compactly and the space occupied is reduced.

[0072] Optionally, the alarm push rod 70 is mounted on the housing 12 and is hinged to the housing 12. When the operating mechanism 400 abuts against the alarm push rod 70, the alarm push rod 70 rotates relative to the housing 12 and triggers the contact of the alarm micro switch 80, and the alarm micro switch 80 alarms. Of course, in some other embodiments, the alarm push rod 70 can also be set to be slidably connected to the housing 12, which is not limited here.

[0073] The shunt tripping mechanism 100 further includes a second elastic reset member 90, which is disposed between the alarm push rod 70 and the housing 12. When the alarm push rod 70 triggers the alarm micro switch 80, the second elastic reset member 90 deforms and stores energy. The alarm push rod 70 can be reset relative to the housing 12 under the action of the second elastic reset member 90. Optionally, the second elastic reset member 90 is a torsion spring. Figure 5 The cover 12 is provided with a third positioning column 124, the torsion spring is sleeved outside the third positioning column 124, the third positioning column 124 is inserted into the third positioning hole 71 of the alarm push rod 70, and the two ends of the torsion spring are respectively connected to the cover 12 and the alarm push rod 70. In this way, the third positioning hole 71 cooperates with the third positioning column 124 to not only position the alarm push rod 70, but also, when the alarm push rod 70 rotates relative to the cover 12, the third positioning column 124 also serves as the rotation axis of the alarm push rod 70.

[0074] It is conceivable that the second elastic reset member 90 may also be other elastic members, which are not limited here. Meanwhile, the assembly between the housing 12, the second elastic reset member 90 and the alarm push rod 70 is also not limited.

[0075] Furthermore, the mounting plate 11 is a circuit board, and the alarm micro switch 80, the opening indication switch 60, and the shunt trip power switch 30 are all electrically connected to the mounting plate 11. The mounting plate 11 is connected to the power source through the wiring terminal 110 to obtain electrical energy, and the micro switch electrically connected to the mounting plate 11 is powered by the mounting plate 11.

[0076] Another embodiment of the present application further provides a shunt trip mechanism 100 included in the above-mentioned circuit breaker 1000. Since the circuit breaker 1000 has beneficial effects, the shunt trip mechanism 100 belonging to the above-mentioned circuit breaker 1000 has the same beneficial effects, which will not be described in detail here.

[0077] The working principles of the shunt tripping mechanism 100 and the circuit breaker 1000 provided in the embodiment of the present application are as follows:

[0078] When closing:

[0079] The auxiliary push rod 40 does not contact the moving contact mechanism 200, and the alarm push rod 70 does not contact the operating mechanism 400. At this time, each micro switch will not be triggered, and the shunt release 10 is energized.

[0080] Normal opening:

[0081] The operating mechanism 400 drives the moving contact mechanism 200 to rotate relative to the static contact mechanism 300, and the rotating shaft 202 of the moving contact mechanism 200 presses against the auxiliary push rod 40. The auxiliary push rod 40 triggers the opening indication switch 60 and the shunt release power switch 30. The opening indication switch 60 sends a closing signal, and the shunt release 20 loses power. At this time, the alarm microswitch 80 will not be triggered.

[0082] Abnormal opening:

[0083] The shunt trip mechanism 100 receives an external trip signal, and the shunt trip push rod 21 pulls the traction rod 401 of the circuit breaker 1000, so that the circuit breaker 1000 is tripped. During the trip process, the rotating shaft 202 of the moving contact mechanism 200 contacts the auxiliary push rod 40 upward and presses against the auxiliary push rod 40. The auxiliary push rod 40 moves upward and presses against the shunt trip push rod 21 through its first inclined surface 41, and the shunt trip push rod 21 is reset. The auxiliary push rod 40 contacts the trip indication switch 60 and the shunt trip power switch 30, and the trip indication switch 60 sends a trip signal, and the shunt release 20 loses power. At the same time, the operating mechanism 400 contacts the alarm push rod 70, and the alarm push rod 70 moves relative to the cover 12 and triggers the alarm micro switch 80, which sends a signal to indicate a fault.

[0084] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0085] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A shunt tripping mechanism, characterized in that: include: Mounting member (10); A shunt release (20), mounted on the mounting member (10), having a shunt release push rod (21) for achieving shunt release; An auxiliary push rod (40) is movably mounted on the mounting member (10); the shunt trip push rod (21) of the shunt release (20) can move to a movable path of the auxiliary push rod (40) when performing shunt tripping, and the auxiliary push rod (40) moves relative to the mounting member (10) to push against the shunt trip push rod (21), so that the shunt trip push rod (21) is reset.

2. The shunt tripping mechanism according to claim 1, characterized in that: The shunt tripping mechanism further comprises: A shunt trip power switch (30) is mounted on the mounting member (10), wherein the contact of the shunt trip power switch (30) is located on the movable path of the auxiliary push rod (40); when the shunt trip push rod (21) of the shunt releaser (20) performs shunt tripping, the auxiliary push rod (40) moves relative to the mounting member (10) to trigger the shunt trip power switch (30), thereby causing the shunt releaser (20) to lose power.

3. The shunt tripping mechanism according to claim 1, characterized in that: The auxiliary push rod (40) is provided with a first inclined surface (41), the first inclined surface (41) is arranged toward the shunt trip push rod (21), and the auxiliary push rod (40) abuts against the shunt trip push rod (21) via the first inclined surface (41).

4. The shunt tripping mechanism according to claim 1, characterized in that: The shunt tripping mechanism further comprises a first elastic reset member (50), wherein the first elastic reset member (50) is arranged between the auxiliary push rod (40) and the mounting member (10); when the auxiliary push rod (40) abuts against the shunt tripping push rod (21), the first elastic reset member (50) deforms and stores energy.

5. The shunt tripping mechanism according to claim 1, characterized in that: The mounting member (10) comprises a mounting plate (11) and a cover shell (12); the mounting plate (11) is mounted on the cover shell (12) and the two together form a mounting space; The shunt release (20) is installed on the housing (12) and is located in the installation space. The shunt release push rod (21) of the shunt release (20) extends through the installation space. The auxiliary push rod (40) is installed outside the housing (12) and partially extends into the installation space.

6. A circuit breaker, characterized in that: The circuit breaker comprises the shunt tripping mechanism as described in any one of claims 1-5.

7. The circuit breaker according to claim 6, characterized in that: The circuit breaker further includes an operating mechanism, and the shunt tripping mechanism further includes: An alarm push rod (70) is movably mounted on the mounting member (10); An alarm micro switch (80) is mounted on the mounting member (10), wherein a contact of the alarm micro switch (80) is located on a moving path of the alarm push rod (70), and when the shunt trip push rod (21) of the shunt release (20) performs shunt tripping, the alarm push rod (70) can be pushed against by the operating mechanism to move relative to the mounting member (10) to trigger the alarm micro switch (80); A second elastic reset member (90), wherein the second elastic reset member (90) is arranged between the alarm push rod (70) and the mounting member (10); when the alarm push rod (70) triggers the alarm micro switch (80), the second elastic reset member (90) deforms and stores energy.

8. The circuit breaker according to claim 6, characterized in that: The circuit breaker also includes a static contact mechanism (300) and a moving contact mechanism (200); The shunt trip push rod (21) of the shunt release (20) can move relative to the mounting member (10) to the movable path of the auxiliary push rod (40), and the movement of the shunt trip push rod (21) can pull the traction rod, so that the moving contact (201) of the moving contact mechanism (200) of the circuit breaker and the static contact (301) of the static contact mechanism (300) are abnormally disconnected, the moving contact mechanism (200) moves relative to the static contact mechanism (300), and the movement of the moving contact mechanism (200) can abut against the auxiliary push rod (40), so that the auxiliary push rod (40) moves relative to the mounting member (10) to abut against the shunt trip push rod (21), so that the shunt trip push rod (21) is reset.

9. The circuit breaker according to claim 8, characterized in that The shunt tripping mechanism further comprises: A shunt trip power switch (30) mounted on the mounting member (10), wherein a contact of the shunt trip power switch (30) is located on a movable path of the auxiliary push rod (40); When the moving contact (201) and the static contact (301) of the circuit breaker are normally or abnormally opened, the moving contact mechanism (200) can move relative to the static contact mechanism (300), and the movement of the moving contact mechanism (200) can push against the auxiliary push rod (40) to make it move relative to the mounting member (10), so as to trigger the shunt trip power switch (30), and the shunt tripper (20) loses power; When the moving contact (201) and the stationary contact (301) of the circuit breaker are closed, the shunt tripping power switch (30) is released by the auxiliary push rod (40), and the shunt tripping device (20) is energized.

10. The circuit breaker according to claim 9, characterized in that The shunt tripping mechanism further comprises: The alarm micro switches (80) are all mounted on the mounting member (10); An alarm push rod (70) is movably mounted on the mounting member (10); When the moving contact (201) and the stationary contact (301) of the circuit breaker are abnormally disconnected, the operating mechanism of the circuit breaker can abut against the alarm push rod (70) to make it move relative to the mounting member (10) to trigger the alarm micro switch (80); when the moving contact (201) and the stationary contact (301) of the circuit breaker are closed or normally disconnected, the alarm micro switch (80) is released by the alarm push rod (70).

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