A fast plug-in circuit breaker

Abstract

The utility model relates to a kind of quick plug-in circuit breaker, including, the bottom of shell is equipped with through-hole;Plug-in copper bar, the plug-in copper bar is located in shell, the both ends of plug-in copper bar are respectively equipped as fixed end and connecting end, the fixed end is fixedly connected with shell, the connecting end extends to the top of through-hole, the long slot for the insertion of the conducting bar in distribution box is opened on the connecting end, the long slot extends along the length direction of plug-in copper bar, the long slot penetrates the upper and lower sides of plug-in copper bar.The utility model has the beneficial effect that: when installing, the conducting bar in distribution box is inserted into the long slot on plug-in copper bar, so that the conducting bar and plug-in copper bar contact to be electrically connected, so that circuit breaker is connected through bottom, effectively reduce the space occupied when connecting upper and lower sides, so that its volume is smaller, wiring is more convenient.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, and in particular to a quick-connect circuit breaker. Background Technology

[0002] A circuit breaker is a switching device that can close, carry, and interrupt current under normal circuit conditions and can close, carry, and interrupt current under abnormal circuit conditions within a specified time.

[0003] Existing circuit breakers typically have terminals on the top and bottom for wiring. This means that after the circuit breaker is installed in the distribution box, connecting wires will be led out from the top and bottom, occupying a lot of space in the distribution box. This often causes problems such as the inability to install the circuit breaker or other electrical equipment in the distribution box. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a quick-connect circuit breaker to solve the above problems.

[0005] The technical solution of this utility model is implemented as follows: a quick-connect circuit breaker, comprising, The housing has a through hole at its bottom; A plug-in copper busbar is provided inside the housing. The two ends of the plug-in copper busbar are respectively designated as a fixed end and a connecting end. The fixed end is fixedly connected to the housing, and the connecting end extends above the through hole. A long groove is provided on the connecting end for the insertion of conductive busbars in the distribution box. The long groove extends along the length of the plug-in copper busbar and passes through the upper and lower sides of the plug-in copper busbar.

[0006] By adopting the above technical solution, during installation, the conductive busbars inside the distribution box are inserted into the long slots on the plug-in copper busbars, so that the conductive busbars and plug-in copper busbars make contact and make electrical connections. This allows the circuit breaker to be connected from the bottom, effectively reducing the space occupied by the top and bottom sides when connecting, making it smaller and more convenient for wiring.

[0007] This utility model is further configured to include: An elastic element acts on both sides of the connection end to limit the displacement and deformation of the connection end to both sides.

[0008] By adopting the above technical solution, when the conductive busbar is inserted into the long groove, the elastic element can effectively clamp the conductive busbar in the long groove, enabling it to reliably bear the load and improve the connection stability.

[0009] The present invention is further configured such that the cross-section of the elastic element is arc-shaped, and its two ends are connected to the two sides of the connecting end.

[0010] By adopting the above technical solution, the elastic element can have better elastic properties, thereby improving the connection stability of the busbar.

[0011] The present invention is further configured such that: a locking block protrudes from the housing near the connecting end and extends into the long groove, the locking block being used to limit the minimum spacing of the long groove.

[0012] By adopting the above technical solution, the card block can avoid the problem of the conductive busbar not being able to be inserted into the long slot due to the small spacing of the long slot, making the connection between the conductive busbar and the plug-in copper busbar more convenient.

[0013] The present invention is further configured such that: a chamfer is provided on the inner wall of the end of the long groove near the card block.

[0014] By adopting the above technical solution, the card block can be more easily inserted into the long slot, making the installation of the copper busbar more convenient.

[0015] The present invention is further configured such that: a limiting member is provided inside the housing above the plug-in copper busbar; the lower side of the limiting member and the bottom of the inner wall of the housing are provided with a distance matching the thickness of the connecting end; the lower side of the connecting end abuts against the bottom of the inner side of the housing; and the upper side of the connecting end abuts against the lower side of the limiting member.

[0016] By adopting the above technical solution, the limiting component cooperates with the inner bottom of the housing to vertically limit and fix the plug-in copper busbar, making the plug-in copper busbar more stable when plugged in and out of the conductive busbar and less prone to displacement.

[0017] The present invention is further configured such that: the housing is provided with a wiring terminal and an operating mechanism; the wiring terminal is connected to the plug-in copper busbar through the operating mechanism; the wiring terminal is provided with a thermal tripping mechanism and a magnetic tripping mechanism that cooperate with the operating mechanism; the operating mechanism includes a transmission rod that cooperates with the thermal tripping mechanism and the magnetic tripping mechanism, and a moving contact that cooperates with the plug-in copper busbar; the plug-in copper busbar is provided with a stationary contact that cooperates with the moving contact; and the wiring terminal includes a wiring copper busbar.

[0018] By adopting the above technical solution, the terminal block cooperates with the operating mechanism through the thermal tripping mechanism and the magnetic tripping mechanism. The opening and closing of the moving contact and the stationary contact are realized through the action of the operating mechanism, making it smaller in size and having complete circuit breaking and arc extinguishing functions.

[0019] The present invention is further configured such that: the thermal tripping mechanism includes a bimetallic strip and an adjusting bolt; the bimetallic strip is L-shaped and its lower end is fixed to the copper busbar; the upper end of the bimetallic strip is connected to the adjusting bolt; when the thermal tripping action is performed, the bimetallic strip drives the transmission rod to move, thereby realizing the separation of the moving contact and the stationary contact.

[0020] By adopting the above technical solution, when the bimetallic strip heats up and bends, it will push the transmission rod to move through the adjusting bolt, thereby realizing the opening action of the moving contact and the stationary contact.

[0021] The present invention is further configured such that: the magnetic tripping mechanism includes a fixing member, a magnetic yoke, and an armature; both the fixing member and the magnetic yoke are U-shaped and fixedly connected to the wiring copper busbar; the armature has connecting ears protruding on both sides that are rotatably connected to the fixing member; the armature has a push rod protruding on it that cooperates with the transmission rod; the armature rotates when the magnetic tripping is activated, thereby driving the transmission rod to move and realize the separation of the moving contact and the stationary contact.

[0022] By adopting the above technical solution, when the current on the copper busbar exceeds a certain value, the magnetic force generated by the yoke will attract the armature to rotate, thereby driving the transmission rod through the push rod to realize the opening action of the moving contact and the stationary contact.

[0023] The present invention is further configured such that: an arc-extinguishing chamber is provided at the opening and closing point of the moving contact and the stationary contact; the arc-extinguishing chamber includes arc-extinguishing grid plates arranged at intervals along the height direction and arc-extinguishing covers provided on both sides of the arc-extinguishing grid plates; the bottom of the arc-extinguishing chamber is provided with an arc-inducing plate electrically connected to the plug-in copper busbar; the arc-inducing plate is located close to the stationary contact.

[0024] By adopting the above technical solution, the arc-initiating plate can effectively introduce the generated electric arc into the depth of the arc-extinguishing chamber, thereby improving the arc-extinguishing effect. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of the present utility model. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the present utility model. Figure 2 ; Figure 3 Cross-sectional view of the structure of this utility model Figure 1 ; Figure 4 Cross-sectional view of the structure of this utility model Figure 2 ; Figure 5 This is a schematic diagram of the internal structure of this utility model; Figure 6 This is a schematic diagram of the plug-in copper busbar in this utility model; Figure 7 This is a schematic diagram of the thermal tripping mechanism and the magnetic tripping mechanism in this utility model; Figure 8 This is a cross-sectional view of the arc-extinguishing chamber in this utility model. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] like Figures 1-8 As shown, this utility model discloses a quick-connect circuit breaker, including a housing 1 and a copper busbar 2. A through hole 10 is provided at the bottom of the housing 1. The copper busbar 2 is disposed inside the housing 1, with a fixed end 20 and a connecting end 21 at its two ends. The fixed end 20 is fixedly connected to the housing 1, and the connecting end 21 extends above the through hole 10. A long slot 210 is provided on the connecting end 21 for inserting a conductive busbar from a distribution box. The long slot 210 extends along the length of the copper busbar 2 and passes through both the upper and lower sides of the copper busbar 2. During installation, the conductive busbar from the distribution box is inserted into the long slot 210 on the copper busbar 2, making contact and electrical connection between the conductive busbar and the copper busbar 2. This allows the circuit breaker to be connected from the bottom, effectively reducing the space occupied by connections on the upper and lower sides, resulting in a smaller size and more convenient wiring.

[0029] In this embodiment of the invention, an elastic element 3 is also included. The elastic element 3 acts on both sides of the connecting end 21 to limit the displacement and deformation of the connecting end 21 to both sides. When the conductive busbar is inserted into the long groove 210, the elastic element 3 can effectively clamp the conductive busbar in the long groove 210, so that it can reliably bear the load and improve the connection stability.

[0030] In this embodiment of the invention, the cross-section of the elastic element 3 is arc-shaped, with its two ends connected to both sides of the connecting end 21. This enables the elastic element 3 to have better elastic properties, thereby improving the connection stability of the conductive busbar.

[0031] In this embodiment of the present invention, a locking block 11 protrudes from the housing 1 near the connecting end 21 and extends into the elongated slot 210. The locking block 11 is used to limit the minimum spacing of the elongated slot 210. The locking block 11 can prevent the conductive busbar from being unable to be inserted into the elongated slot 210 due to the excessively small spacing of the elongated slot 210, making the connection between the conductive busbar and the plug-in copper busbar 2 more convenient.

[0032] In this embodiment of the invention, the inner wall of the long slot 210 near the locking block 11 is chamfered. This makes it easier for the locking block 11 to enter the long slot 210, making the installation of the copper busbar 2 more convenient.

[0033] In this embodiment of the invention, a limiting member 12 is provided inside the housing 1, located above the insertion copper busbar 2. A gap matching the thickness of the connecting end 21 is provided between the lower side of the limiting member 12 and the bottom of the inner wall of the housing 1. The lower side of the connecting end 21 abuts against the bottom inner side of the housing 1, and the upper side of the connecting end 21 abuts against the lower side of the limiting member 12. The limiting member 12 cooperates with the bottom inner side of the housing 1 to vertically limit and fix the insertion copper busbar 2, making the insertion copper busbar 2 more stable and less prone to displacement when plugged in and unplugged from the conductive busbar.

[0034] In this embodiment of the invention, the housing 1 is provided with a terminal block 4 and an operating mechanism 5. The terminal block 4 is connected to the plug-in copper busbar 2 via the operating mechanism 5. The terminal block 4 is provided with a thermal tripping mechanism 6 and a magnetic tripping mechanism 7 that cooperate with the operating mechanism 5. The operating mechanism 5 includes a transmission rod 50 that cooperates with the thermal tripping mechanism 6 and the magnetic tripping mechanism 7, and a moving contact 51 that cooperates with the plug-in copper busbar 2. The plug-in copper busbar 2 is provided with a stationary contact 22 that cooperates with the moving contact 51. The terminal block 4 includes a copper busbar 40. The terminal block 4 cooperates with the operating mechanism 5 via the thermal tripping mechanism 6 and the magnetic tripping mechanism 7. The opening and closing of the moving contact 51 and the stationary contact 22 is achieved by the action of the operating mechanism 5, making it smaller in size and providing complete circuit breaking and arc extinguishing functions.

[0035] In this embodiment of the invention, the thermal tripping mechanism 6 includes a bimetallic strip 60 and an adjusting bolt. The bimetallic strip 60 is L-shaped and its lower end is fixed to the copper busbar 40. The upper end of the bimetallic strip 60 is connected to the adjusting bolt. When the bimetallic strip 60 thermally trips, it drives the transmission rod 50 to move, thereby separating the moving contact 51 from the stationary contact 22. When the bimetallic strip 60 heats up and bends, it will push the transmission rod 50 to move through the adjusting bolt, thereby separating the moving contact 51 from the stationary contact 22.

[0036] In this embodiment of the invention, the magnetic tripping mechanism 7 includes a fixing member 70, a magnetic yoke 71, and an armature 72. Both the fixing member 70 and the magnetic yoke 71 are U-shaped and fixedly connected to the copper busbar 40. Connecting ears 720, rotatably connected to the fixing member 70, protrude from both sides of the armature 72. A push rod 721, cooperating with the transmission rod 50, protrudes from the armature 72. When the magnetic tripping action is performed, the armature 72 rotates, thereby driving the transmission rod 50 to move, thus separating the moving contact 51 from the stationary contact 22. When the current on the copper busbar 40 exceeds a certain value, the magnetic force generated by the magnetic yoke 71 attracts the armature 72 to rotate, thereby pushing the transmission rod 50 through the push rod 721, achieving the separation of the moving contact 51 from the stationary contact 22.

[0037] In this embodiment of the invention, an arc-extinguishing chamber 8 is provided at the opening and closing point of the moving contact 51 and the stationary contact 22. The arc-extinguishing chamber 8 includes arc-extinguishing grid plates 80 arranged at intervals along the height direction and arc-extinguishing covers 81 provided on both sides of the arc-extinguishing grid plates 80. An arc-inducing plate 82 electrically connected to the plug-in copper busbar 2 is provided at the bottom of the arc-extinguishing chamber 8, and the arc-inducing plate 82 is located close to the stationary contact 22. The arc-inducing plate 82 can effectively guide the generated arc into the depth of the arc-extinguishing chamber 8, thereby improving the arc-extinguishing effect.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A quick-connect circuit breaker, characterized in that, include, The housing (1) has a through hole (10) at its bottom. A copper busbar (2) is installed inside the housing (1). The two ends of the copper busbar (2) are respectively set as a fixed end (20) and a connecting end (21). The fixed end (20) is fixedly connected to the housing (1). The connecting end (21) extends above the through hole (10). A long groove (210) for inserting the conductive busbar in the power distribution box is opened on the connecting end (21). The long groove (210) extends along the length direction of the copper busbar (2) and penetrates the upper and lower sides of the copper busbar (2).

2. The quick-connect circuit breaker according to claim 1, characterized in that, Also includes: The elastic element (3) acts on both sides of the connecting end (21) to limit the displacement and deformation of the connecting end (21) to both sides.

3. A quick-connect circuit breaker according to claim 2, characterized in that, The cross-section of the elastic element (3) is circular arc-shaped, and its two ends are connected to the two sides of the connecting end (21).

4. A quick-connect circuit breaker according to claim 1, characterized in that, The housing (1) has a protruding locking block (11) near the connecting end (21) that extends into the long groove (210). The locking block (11) is used to limit the minimum spacing of the long groove (210).

5. A quick-connect circuit breaker according to claim 4, characterized in that, The inner wall of the long groove (210) near the card block (11) has a chamfer.

6. A quick-connect circuit breaker according to claim 1, characterized in that, The housing (1) is provided with a limiting member (12) located above the plug-in copper busbar (2). The lower side of the limiting member (12) and the bottom of the inner wall of the housing (1) are provided with a distance that matches the thickness of the connecting end (21). The lower side of the connecting end (21) abuts against the bottom of the inner side of the housing (1), and the upper side of the connecting end (21) abuts against the lower side of the limiting member (12).

7. A quick-connect circuit breaker according to claim 1, characterized in that, The housing (1) is provided with a wiring terminal (4) and an operating mechanism (5). The wiring terminal (4) is connected to the plug-in copper busbar (2) through the operating mechanism (5). The wiring terminal (4) is provided with a thermal tripping mechanism (6) and a magnetic tripping mechanism (7) that cooperate with the operating mechanism (5). The operating mechanism (5) includes a transmission rod (50) that cooperates with the thermal tripping mechanism (6) and the magnetic tripping mechanism (7) and a moving contact (51) that cooperates with the plug-in copper busbar (2). The plug-in copper busbar (2) is provided with a stationary contact (22) that cooperates with the moving contact (51). The wiring terminal (4) includes a wiring copper busbar (40).

8. A quick-connect circuit breaker according to claim 7, characterized in that, The thermal tripping mechanism (6) includes a bimetallic strip (60) and an adjusting bolt. The bimetallic strip (60) is L-shaped and its lower end is fixed on the copper busbar (40). The upper end of the bimetallic strip (60) is connected to the adjusting bolt. When the bimetallic strip (60) is in thermal tripping action, it drives the transmission rod (50) to move, thereby realizing the opening of the moving contact (51) and the stationary contact (22).

9. A quick-connect circuit breaker according to claim 7, characterized in that, The magnetic tripping mechanism (7) includes a fixing member (70), a magnetic yoke (71) and an armature (72). The fixing member (70) and the magnetic yoke (71) are both U-shaped and fixedly connected to the wiring copper busbar (40). The armature (72) has connecting ears (720) protruding on both sides that are rotatably connected to the fixing member (70). The armature (72) has a push rod (721) protruding on it that cooperates with the transmission rod (50). When the magnetic tripping is activated, the armature (72) rotates, thereby driving the transmission rod (50) to move, so as to realize the opening of the moving contact (51) and the stationary contact (22).

10. A quick-connect circuit breaker according to claim 7, characterized in that, An arc-extinguishing chamber (8) is provided at the opening and closing point of the moving contact (51) and the stationary contact (22). The arc-extinguishing chamber (8) includes an arc-extinguishing grid plate (80) arranged at intervals along the height direction and an arc-extinguishing cover (81) provided on both sides of the arc-extinguishing grid plate (80). The bottom of the arc-extinguishing chamber (8) is provided with an arc-inducing plate (82) electrically connected to the plug-in copper busbar (2). The arc-inducing plate (82) is located close to the stationary contact (22).

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