Arc extinguish chamber installation structure and circuit breaker

Abstract

The utility model relates to the technical field of low-voltage electric appliances, in particular to an arc extinguish chamber mounting structure and a circuit breaker. The arc extinguish chamber mounting structure comprises at least one limiting pin; an installation cavity used for containing an arc extinguish chamber is formed in a shell of the circuit breaker, at least one first clamping groove is formed in the inner cavity face of the installation cavity in a concave mode, at least one second clamping groove is formed in the outer wall face of the arc extinguish chamber in a concave mode, the first clamping grooves correspond to the second clamping grooves in a one-to-one mode, and a jack is defined by the corresponding first clamping groove and the corresponding second clamping groove. The limiting pins correspond to the inserting holes in a one-to-one mode, and each limiting pin is inserted into the corresponding inserting hole. According to the mounting structure provided by the utility model, the limiting pin is not inserted into the arc extinguish chamber, so that the internal space of the arc extinguish chamber is not influenced. Under the same arc extinguish chamber space, the installation structure provided by the invention can reduce the arc extinguish chamber space occupied by the installation of the arc extinguish chamber, so that the arrangement number of the grid sheets can be increased to the maximum extent, the heat capacity is improved, and the improvement of the arc breaking performance of the arc extinguish chamber is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to an arc extinguishing chamber installation structure and a circuit breaker. Background Art

[0002] The arc extinguishing chamber is one of the key structures of an electrical switch. It is installed in the housing of the electrical switch. When the main contact and the static contact are disconnected, the arc extinguishing grid arranged in the arc extinguishing chamber cuts the generated arc, dividing the long arc into multiple short arcs, and achieves the arc extinguishing effect by increasing the arc voltage to reduce the fault current.

[0003] Most of the existing arc extinguishing chambers are installed in the housing by screw connection. When installing the arc extinguishing chamber, after the arc extinguishing chamber is installed in the depth direction of the housing, screws are inserted into the arc extinguishing chamber at both ends of the housing in the width direction in the depth direction for fixing. Since the screws occupy part of the space in the grid arrangement direction of the arc extinguishing chamber, the arrangement of the grids in the arc extinguishing chamber is affected, resulting in a reduction in the number of grids in the arc extinguishing chamber under the same depth of the arc extinguishing chamber, which is not conducive to arc extinguishing under high voltage. Utility Model Content

[0004] The first object of the utility model is to provide an arc extinguishing chamber installation structure to solve the technical problem in the prior art that the screws occupy the internal space of the arc extinguishing chamber, resulting in a reduction in the number of grids in the arc extinguishing chamber, thereby affecting the arc extinguishing performance of the arc extinguishing chamber.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An arc extinguishing chamber mounting structure is used to mount the arc extinguishing chamber on a housing, wherein the housing is provided with a mounting cavity for accommodating the arc extinguishing chamber, and the arc extinguishing chamber mounting structure comprises at least one limiting pin;

[0007] At least one first card slot is concavely formed on the inner surface of the installation cavity, and at least one second card slot is concavely formed on the outer wall surface of the arc extinguishing chamber, the first card slot and the second card slot correspond to each other one by one, and a corresponding group of the first card slot and the second card slot surround and form a plug hole;

[0008] The limiting pins correspond to the inserting holes one by one, and each limiting pin is inserted into the corresponding inserting hole.

[0009] Furthermore, the limiting pin comprises a limiting section and a threaded section connected in a step-like manner, wherein: the limiting section is inserted into the corresponding insertion hole; and the threaded section is screwed to the arc extinguishing chamber and / or the shell.

[0010] Further, the installation cavity has two side cavity walls arranged opposite to each other along a first direction and two end cavity walls arranged opposite to each other along a second direction, and the first card slot is arranged on the side cavity walls;

[0011] At least one first operating through hole is formed on one of the end cavity walls, the first operating through holes correspond to the insertion holes one by one, and a corresponding group of the first operating through holes and the insertion holes are connected to each other.

[0012] Further, the limiting pin is screwed or glued to the corresponding first operating through hole;

[0013] Or, one end of the limit pin passes through the first operating through hole, and a fastener is provided on the passing portion;

[0014] Alternatively, a blocking structure is provided in the first operating through hole or on an outer end surface of the first operating through hole away from the insertion hole.

[0015] Furthermore, the socket is a blind hole; the limit pin includes a limit section and a threaded section, the outer diameter of the threaded section is larger than the outer diameter of the limit section, and the threaded section is arranged at one end of the limit section close to the first operating through hole; the limit section is arranged in the corresponding socket, and the threaded section is arranged in the corresponding first operating through hole and is screwed to the corresponding first operating through hole.

[0016] Furthermore, at least one second operating through hole is formed on the other end cavity wall, the second operating through holes correspond to the insertion holes one by one, and a corresponding group of the second operating through holes and the insertion holes are connected to each other.

[0017] Further, the limiting pin is screwed or glued to the corresponding second operating through hole;

[0018] Or, one end of the limit pin passes through the second operating through hole, and a fastener is provided on the passing portion;

[0019] Alternatively, a blocking structure is provided in the second operating through hole or on an outer end surface of the second operating through hole away from the insertion hole.

[0020] Furthermore, at least one of the jacks is disposed on opposite sides of the arc extinguishing chamber.

[0021] Furthermore, the outer contour of the cross section of the limit pin is one or more of a circular shape, an elliptical shape, and a polygonal shape.

[0022] The second object of the utility model is to provide a circuit breaker, comprising an arc extinguishing chamber, a housing and the arc extinguishing chamber mounting structure described in any one of the above items.

[0023] Beneficial effects of the utility model:

[0024] The utility model provides an arc extinguishing chamber installation structure and a circuit breaker, wherein the arc extinguishing chamber installation structure comprises at least one limit pin; a housing of the circuit breaker is provided with a mounting cavity for accommodating the arc extinguishing chamber, an inner cavity surface of the mounting cavity is concavely provided with at least one first card groove, an outer wall surface of the arc extinguishing chamber is concavely provided with at least one second card groove, the first card groove and the second card groove correspond one to one, and a corresponding group of the first card groove and the second card groove are surrounded to form an insertion hole; the limit pins correspond one to one to the insertion holes, and each limit pin is inserted in the corresponding insertion hole.

[0025] Compared with the traditional technical solution of fixing the arc extinguishing chamber on the housing by inserting screws into the arc extinguishing chamber, the limit pin in the installation structure provided by the present application is not inserted into the arc extinguishing chamber, so it does not affect the internal space of the arc extinguishing chamber. Under the same arc extinguishing chamber space, the installation structure provided by the present application can reduce the arc extinguishing chamber space occupied by the arc extinguishing chamber installation, thereby maximizing the number of grid arrangement and improving the heat capacity, which is conducive to improving the arc breaking performance of the arc extinguishing chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A three-dimensional schematic diagram of the arc extinguishing chamber installation structure provided in Embodiment 1 of the present utility model;

[0028] Figure 2 A schematic diagram of the three-dimensional structure of the housing and the limit pin provided in the first embodiment of the utility model;

[0029] Figure 3 A cross-sectional schematic diagram of the arc extinguishing chamber installation structure provided in Embodiment 1 of the present utility model;

[0030] Figure 4 A schematic diagram of the three-dimensional structure of the arc extinguishing chamber provided in the first embodiment of the utility model;

[0031] Figure 5 A schematic diagram of the front view structure of the arc extinguishing chamber provided in the first embodiment of the utility model;

[0032] Figure 6 A cross-sectional schematic diagram of the arc extinguishing chamber installation structure provided in the third embodiment of the present utility model;

[0033] Figure 7A schematic cross-sectional view of the arc extinguishing chamber installation structure when the first thread segment and the second thread segment are arranged opposite to each other, provided in the fourth embodiment of the utility model;

[0034] Figure 8 A schematic diagram of the three-dimensional structure of the limit pin provided in the fourth embodiment of the utility model;

[0035] Fig. 9 A cross-sectional schematic diagram of the arc extinguishing chamber installation structure (with a limit pin) when the first thread segment and the second thread segment are staggered in position, provided in the fourth embodiment of the utility model;

[0036] Fig.10 A cross-sectional schematic diagram of the arc extinguishing chamber installation structure (without the limit pin) when the first thread segment and the second thread segment are staggered in position provided in the fourth embodiment of the utility model;

[0037] Fig.11 This is a cross-sectional schematic diagram of the arc extinguishing chamber installation structure provided in Embodiment 5 of the present utility model.

[0038] icon:

[0039] 10-arc extinguishing chamber;

[0040] 20-housing; 201-installation cavity;

[0041] 1-limiting pin; 11-limiting section; 12-threaded section; 13-operating groove;

[0042] 2-jack; 21-first slot; 211-first thread segment; 22-second slot; 221-second thread segment;

[0043] 3- first operating through hole;

[0044] 4- second operating through hole;

[0045] 5- Sealing structure. DETAILED DESCRIPTION

[0046] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0047] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or position relationship, are based on the orientation or position 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 a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0048] It should be noted that in the description of the present invention, the terms "connection" and "installation" 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 directly connected or connected through an intermediate medium; it can be a mechanical connection or an electrical connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] Embodiment 1

[0050] The existing arc extinguishing chamber is fixed in the housing by screws, which occupy a part of the depth space of the arc extinguishing chamber, resulting in a reduction in the number of grids in the arc extinguishing chamber under the same depth of the arc extinguishing chamber, which is not conducive to arc extinguishing under high-level voltage.

[0051] Based on this, the first embodiment of the present invention provides an arc extinguishing chamber installation structure for installing the arc extinguishing chamber 10 on the housing 20, referring to Figures 1 to 3 , the arc extinguishing chamber mounting structure includes at least one limiting pin 1;

[0052] The housing 20 is provided with a mounting cavity 201 for accommodating the arc extinguishing chamber 10. At least one first card groove 21 is concavely provided on the inner surface of the mounting cavity 201. At least one second card groove 22 is concavely provided on the outer wall surface of the arc extinguishing chamber 10. The first card groove 21 and the second card groove 22 correspond to each other one by one, and a corresponding group of first card grooves 21 and second card grooves 22 are surrounded to form a plug hole 2.

[0053] The limiting pins 1 correspond to the insertion holes 2 one by one, and each limiting pin 1 is inserted into the corresponding insertion hole 2 .

[0054] When installing the arc extinguishing chamber 10 in the above-mentioned installation structure, first, the arc extinguishing chamber 10 is installed in the installation cavity 201; after the arc extinguishing chamber 10 is installed in place, the second card groove 22 on the arc extinguishing chamber 10 and the first card groove 21 on the installation cavity 201 correspond one to one, and a corresponding group of second card grooves 22 and first card grooves 21 form a socket 2; then, the limit pin 1 is inserted into the corresponding socket 2. Since the opposite sides of the limit pin 1 are respectively engaged in the first card groove 21 and the second card groove 22, the relative position of the arc extinguishing chamber 10 and the shell 20 can be limited by the limit pin 1, thereby realizing the fixed installation of the arc extinguishing chamber 10.

[0055] Compared with the conventional technical solution of fixing the arc extinguishing chamber 10 on the housing 20 by inserting screws into the arc extinguishing chamber 10, the stop pin 1 in the installation structure provided by the present application is not inserted into the arc extinguishing chamber 10, and thus does not affect the internal space of the arc extinguishing chamber 10. Under the same arc extinguishing chamber space, the installation structure provided by the present application can reduce the arc extinguishing chamber space occupied by the arc extinguishing chamber installation, thereby maximizing the number of grid arrangement, improving the heat capacity, and facilitating the arc breaking performance of the arc extinguishing chamber.

[0056] In the above structure, the outer contour of the cross section of the limit pin 1 is one or more of circular, elliptical, polygonal, that is, the limit pin 1 can be one of a circular pin, a square pin, and a special-shaped pin, which is not limited here.

[0057] Continue to refer to Figure 2 The installation cavity 201 has two side cavity walls arranged oppositely along a first direction and two end cavity walls arranged oppositely along a second direction, and the first slot 21 is arranged on the side cavity walls. In this embodiment, the first direction is the length direction of the housing 20, and the second direction is the width direction of the housing 20.

[0058] On the basis of the above structure, at least one first operation through hole 3 is provided on one of the end cavity walls, the first operation through hole 3 corresponds to the plug hole 2 one by one, and a corresponding group of first operation through holes 3 and the plug hole 2 are interconnected. Specifically, the first card slot 21 is provided on the inner wall surface of the side cavity wall and extends along the second direction (i.e., the width direction of the shell); the second card slot 22 is provided on the outer surface of the side wall of the arc extinguishing chamber 10 and also extends along the second direction; a corresponding group of first card slots 21 and second card slots 22 surround the plug hole 2, and the first operation through hole 3 is provided at one end of the corresponding plug hole 2 and is interconnected with the corresponding plug hole 2.

[0059] It is understandable that the first operating through hole 3 can be arranged on the front side end cavity wall of the installation cavity 201, and can also be arranged on the rear side end cavity wall of the installation cavity 201, which is not limited here.

[0060] When installing the arc extinguishing chamber 10 in the above-mentioned installation structure, one end of the limit pin 1 passes through the corresponding first operation through hole 3 and is inserted into the insertion hole 2 to achieve fixed installation of the arc extinguishing chamber 10.

[0061] Reference Figures 3 to 5 , at least one insertion hole 2 is provided on opposite sides of the arc extinguishing chamber 10. In this embodiment, a second clamping groove 22 is provided on the outer surfaces of the two side walls of the arc extinguishing chamber 10, and correspondingly, a first clamping groove 21 is provided on the inner surfaces of the two sides of the installation cavity 201; after the arc extinguishing chamber 10 is installed in the installation cavity 201, a insertion hole 2 is formed on opposite sides of the arc extinguishing chamber 10; two limiting pins 1 are respectively inserted into the two insertion holes 2, so that the opposite sides of the arc extinguishing chamber 10 can be limited, so that the installation of the arc extinguishing chamber 10 is more stable and reliable.

[0062] Furthermore, an operation groove 13 is provided on the end surface of the limiting pin 1 close to the first operation through hole 3. The operation groove 13 may be cross-shaped or straight-shaped for inserting tools such as a screwdriver.

[0063] Embodiment 2

[0064] The second embodiment of the present invention provides an arc extinguishing chamber installation structure, which is an expansion scheme based on the first embodiment.

[0065] Reference Figure 3 In this embodiment, the insertion hole 2 is a blind hole. During installation, one end of the limit pin 1 passes through the corresponding first operation through hole 3 and is inserted into the insertion hole 2. The blind hole-shaped insertion hole 2 can prevent the other end of the limit pin 1 from falling out.

[0066] On the basis of the above structure, a blocking structure 5 is provided in the first operation through hole 3 or on the outer end surface of the first operation through hole 3 away from the insertion hole 2, and the blocking structure 5 is used to prevent the limit pin 1 from slipping out of the first operation through hole 3. Exemplarily, the blocking structure 5 can be a screw plug, a stopper, a rubber strip, etc.; when one end of the limit pin 1 passes through the corresponding first operation through hole 3 and is inserted into the insertion hole 2, the first operation through hole 3 is blocked by the blocking structure 5 such as a screw plug, a stopper, a rubber strip, etc., to prevent the limit pin 1 from slipping out of the first operation through hole 3.

[0067] In summary, in this embodiment, the bottom wall of the insertion hole 2 and the blocking structure 5 limit the axial displacement of the limit pin 1 to prevent the limit pin 1 from falling out from both ends.

[0068] Embodiment 3

[0069] The third embodiment of the present invention provides an arc extinguishing chamber installation structure, which is an expansion scheme based on the first embodiment.

[0070] Reference Figure 6In this embodiment, the limiting pin 1 is screwed or glued to the corresponding first operating through hole 3.

[0071] In the embodiment where the limit pin 1 is screwed to the corresponding first operating through hole 3, the first operating through hole 3 is a threaded hole, and the limit pin 1 is screwed to the first operating through hole 3. Specifically, the limit pin 1 includes a limit section 11 and a threaded section 12, the outer diameter of the threaded section 12 is larger than the outer diameter of the limit section 11, and the threaded section 12 is arranged at one end of the limit section 11 close to the first operating through hole 3; the limit section 11 is arranged in the corresponding insertion hole 2, and the threaded section 12 is arranged in the corresponding first operating through hole 3 and screwed to the corresponding first operating through hole 3. It should be noted that the threaded section 12 of the limit pin 1 can be in the form of a self-tapping screw, and after the threaded section 12 is screwed into the first operating through hole 3, an internal thread is naturally formed in the first operating through hole 3.

[0072] In the embodiment where the stop pin 1 is glued to the corresponding first operation through hole 3, the stop pin 1 and the first operation through hole 3 are glued and fixed. During installation, after one end of the stop pin 1 passes through the corresponding first operation through hole 3 and is inserted into the insertion hole 2, glue is applied to the other end of the stop pin 1 so that one end of the stop pin 1 is glued and fixed in the first operation through hole 3 to prevent the stop pin 1 from falling out.

[0073] Embodiment 4

[0074] The fourth embodiment of the present utility model provides an arc extinguishing chamber installation structure, which is an expansion scheme based on the first embodiment.

[0075] Reference Figure 7 and Figure 8 In this embodiment, at least part of the limiting pin 1 is provided with an external thread, and the first slot 21 and / or the second slot 22 is provided with an internal thread that screws with the external thread on the limiting pin 1 .

[0076] It should be noted that the limiting pin 1 may be processed with external threads on the entire circumference, or may be processed with external threads on only part of the circumference of the limiting pin 1. The limiting pin 1 is screwed and connected with the arc extinguishing chamber 10 and / or the housing 20 through a threaded structure, so as to prevent the limiting pin 1 from falling off from the installation position and improve the reliability of the arc extinguishing chamber installation structure.

[0077] In this embodiment, an internal thread that screws together with the external thread on the limit pin 1 can be set only in the first slot 21, or an internal thread that screws together with the external thread on the limit pin 1 can be set only in the second slot 22, or an internal thread that screws together with the external thread on the limit pin 1 can be set in both the first slot 21 and the second slot 22.

[0078] In the embodiment where internal threads are provided in both the first slot 21 and the second slot 22, a first thread segment 211 is provided in the first slot 21, and a second thread segment 221 is provided in the second slot 22. The positions of the first thread segment 211 and the second thread segment 221 are staggered or relatively arranged and match the external thread.

[0079] Figure 7 In the illustrated embodiment, the first thread segment 211 and the second thread segment 221 are arranged opposite to each other; Figure 7 The first thread segment 211 and the second thread segment 221 can enclose a complete threaded through hole.

[0080] Fig. 9 and Fig.10 In the illustrated embodiment, the positions of the first thread segment 211 and the second thread segment 221 are staggered; Fig. 9 and Fig.10 The first thread segment 211 and the second thread segment 221 are respectively screwed and connected with different positions of the limiting pin 1.

[0081] Continue to refer to Figure 8 The limit pin 1 includes a limit section 11 and a threaded section 12 connected in a step shape, and the socket 2 is in a step shape matching the limit pin 1, wherein: the limit section 11 is inserted in the through hole section of the socket 2; the threaded section 12 is screwed to the arc extinguishing chamber 10 and / or the housing 20 (i.e., the internal threaded section of the socket 2).

[0082] In this embodiment, the outer diameter of the threaded section 12 is smaller than the outer diameter of the limiting section 11, and the threaded section 12 is arranged at the end of the limiting section 11 away from the first operation through hole 3; the limiting section 11 passes through the first operation through hole 3 and the plug hole 2 in sequence, and the threaded section 12 is screwed to the first threaded section 211 and / or the second threaded section 221. The limiting section 11 and the threaded section 12 are connected in a stepped manner, which is convenient for the processing of the thread and the installation prompt of the limiting pin 1.

[0083] It should be noted that the threaded section 12 of the limit pin 1 can be in the form of a self-tapping screw. After the limit pin 1 is screwed into the first slot 21 and the second slot 22, the first threaded section 211 and the second threaded section 221 that are oppositely arranged are naturally formed without processing.

[0084] Embodiment 5

[0085] The fifth embodiment of the present invention provides an arc extinguishing chamber installation structure, which is an expansion scheme based on the first embodiment.

[0086] Reference Fig.11In this embodiment, the jack 2 is a through hole; at least one second operation through hole 4 is provided on the other end cavity wall, and the second operation through hole 4 corresponds to the jack 2 one by one, and a corresponding group of second operation through holes 4 and the jack 2 are connected to each other. Analyzing the above structure, the first operation through hole 3 and the second operation through hole 4 are respectively provided at the opposite ends of the jack 2, and a corresponding group of first operation through holes 3, the jack 2 and the second operation through holes 4 are connected in sequence.

[0087] During installation, one end of the limit pin 1 passes through the corresponding first operating through hole 3 and the plug hole 2 in sequence and is inserted into the second operating through hole 4, or one end of the limit pin 1 passes through the corresponding first operating through hole 3, the plug hole 2 and the second operating through hole 4 in sequence and passes out from the installation cavity 201.

[0088] Embodiment 6

[0089] The sixth embodiment of the present invention provides an arc extinguishing chamber installation structure, which is an expansion scheme based on the fifth embodiment.

[0090] In this embodiment, the limit pin 1 is screwed or glued to the corresponding second operation through hole 4. The connection structure between the limit pin 1 and the second operation through hole 4 refers to the connection structure between the limit pin 1 and the first operation through hole 3 in the third embodiment, which will not be repeated here.

[0091] Embodiment 7

[0092] Embodiment 7 of the present invention provides an arc extinguishing chamber installation structure, which is an expansion scheme based on embodiment 5.

[0093] Reference Fig.11 In this embodiment, one end of the stop pin 1 passes through the second operation through hole 4, and a fastener is provided at the portion passing through. During installation, after one end of the stop pin 1 passes through the corresponding first operation through hole 3, the insertion hole 2, and the second operation through hole 4 in sequence and passes through the installation cavity 201, the portion of the stop pin 1 passing through the second operation through hole 4 is fixed with a fastener. Optionally, the fastener is a standard part such as a nut, a retaining ring, and a cotter pin.

[0094] In this embodiment, the outer diameter of the limit pin 1 located in the first operating through hole 3 is larger than the outer diameter of the limit pin 1 located in the insertion hole 2. Correspondingly, the aperture of the first operating through hole 3 is larger than the aperture of the insertion hole 2. A step surface is formed at the connection between the first operating through hole 3 and the insertion hole 2. The axial displacement of the limit pin 1 is limited by the step surface and the fastener to prevent the limit pin 1 from falling out.

[0095] In addition, in other embodiments, the first operating through hole 3 and the second operating through hole 4 can be fixed to the limit pin 1 by gluing or screwing; a blocking structure 5 can also be provided at the first operating through hole 3 and the second operating through hole 4, respectively, and the limit pin 1 can be axially limited by the two blocking structures 5; the two ends of the limit pin 1 can also be made to pass through the first operating through hole 3 and the second operating through hole 4, respectively, and fasteners can be installed on the passing parts at both ends, and the limit pin 1 can be axially limited by the fasteners at both ends of the limit pin 1. It should be noted that, based on the arc extinguishing chamber installation structure provided in the first embodiment of the present application, the limit pin 1 can also have other axial limiting methods, which are not listed here one by one.

[0096] Embodiment 8

[0097] Embodiment 8 of the present utility model provides a circuit breaker, which includes an arc extinguishing chamber 10, a housing 20 and the arc extinguishing chamber mounting structure described in any of the above embodiments.

[0098] Reference Figure 1 and Figure 2 , at least one mounting cavity 201 is provided on the shell 20; when the number of the mounting cavities 201 is multiple, the multiple mounting cavities 201 are arranged in sequence along the first direction (ie, the length direction of the shell), and an arc extinguishing chamber 10 is provided in each mounting cavity 201.

[0099] The number of arc extinguishing chambers 10 and mounting cavities 201 may be increased or decreased according to product specifications and customer needs, and is not limited here.

[0100] The circuit breaker has at least all the technical effects of the above-mentioned arc extinguishing chamber installation structure, which will not be repeated here.

[0101] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. An arc extinguishing chamber installation structure, used for installing an arc extinguishing chamber (10) on a housing (20), wherein the housing (20) is provided with an installation cavity (201) for accommodating the arc extinguishing chamber (10), characterized in that: The arc extinguishing chamber mounting structure comprises at least one limiting pin (1); At least one first card slot (21) is concavely provided on the inner surface of the installation cavity (201), and at least one second card slot (22) is concavely provided on the outer wall surface of the arc extinguishing chamber (10), the first card slot (21) and the second card slot (22) correspond to each other one by one, and a corresponding group of the first card slot (21) and the second card slot (22) are arranged to form a plug hole (2); The limiting pins (1) correspond to the insertion holes (2) one by one, and each limiting pin (1) is inserted into the corresponding insertion hole (2).

2. The arc extinguishing chamber installation structure according to claim 1, characterized in that: The limiting pin (1) comprises a limiting section (11) and a threaded section (12) connected in a stepped manner, wherein: the limiting section (11) is inserted into the corresponding insertion hole (2); and the threaded section (12) is screwed to the arc extinguishing chamber (10) and / or the housing (20).

3. The arc extinguishing chamber installation structure according to claim 1, characterized in that: The installation cavity (201) has two side cavity walls arranged opposite to each other along a first direction and two end cavity walls arranged opposite to each other along a second direction, and the first clamping groove (21) is arranged on the side cavity walls; At least one first operating through hole (3) is provided on one of the end cavity walls, the first operating through holes (3) correspond one-to-one to the insertion holes (2), and a corresponding group of the first operating through holes (3) and the insertion holes (2) are interconnected.

4. The arc extinguishing chamber installation structure according to claim 3, characterized in that: The limiting pin (1) is screwed or glued to the corresponding first operating through hole (3); Or, one end of the limit pin (1) passes through the first operating through hole (3), and a fastener is provided on the passing portion; Alternatively, a blocking structure (5) is provided inside the first operating through hole (3) or on an outer end surface of the first operating through hole (3) away from the insertion hole (2).

5. The arc extinguishing chamber installation structure according to claim 4, characterized in that: The insertion hole (2) is a blind hole; the limiting pin (1) comprises a limiting section (11) and a threaded section (12); the outer diameter of the threaded section (12) is larger than the outer diameter of the limiting section (11), and the threaded section (12) is arranged at one end of the limiting section (11) close to the first operating through hole (3); the limiting section (11) is arranged in the corresponding insertion hole (2), and the threaded section (12) is arranged in the corresponding first operating through hole (3) and is screwed to the corresponding first operating through hole (3).

6. The arc extinguishing chamber installation structure according to claim 3, characterized in that: At least one second operating through hole (4) is provided on the other end cavity wall, the second operating through holes (4) correspond one-to-one to the insertion holes (2), and a corresponding group of the second operating through holes (4) and the insertion holes (2) are interconnected.

7. The arc extinguishing chamber installation structure according to claim 6, characterized in that: The limiting pin (1) is screwed or glued to the corresponding second operating through hole (4); Or, one end of the limit pin (1) passes through the second operating through hole (4), and a fastener is provided on the passing portion; Alternatively, a blocking structure (5) is provided inside the second operating through hole (4) or on an outer end surface of the second operating through hole (4) away from the insertion hole (2).

8. The arc extinguishing chamber installation structure according to claim 1, characterized in that: At least one insertion hole (2) is provided on opposite sides of the arc extinguishing chamber (10).

9. The arc extinguishing chamber installation structure according to claim 1, characterized in that: The outer contour of the cross section of the limit pin (1) is one or more of a circular, elliptical, and polygonal shape.

10. A circuit breaker, characterized in that: It comprises an arc extinguishing chamber (10), a housing (20) and an arc extinguishing chamber mounting structure according to any one of claims 1 to 9.

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