A direct current circuit breaker

Abstract

A DC circuit breaker comprises a first housing and a second housing, which together define an accommodation space in which a stationary contact assembly and a mechanism assembly are arranged, the mechanism assembly being movable between an open position and a closed position, characterized in that the mechanism assembly comprises a center plate and a movable contact assembly; the center plate is rotatably supported by the first housing and the second housing on both sides thereof; the movable contact assembly is rotatably mounted on the center plate via a movement shaft arranged on the center plate; during rotation of the center plate relative to the first housing and the second housing, the movable contact assembly is rotatable relative to the center plate; and a resilient component of the mechanism assembly acts between the movable contact assembly and the first housing.

Description

Technical Field

[0001] This disclosure relates to a DC circuit breaker. The DC circuit breaker incorporates a double-contact mechanism, which features rapid closing, a large opening distance, and meets the contact pressure requirements for high current ratings, as well as the tripping force and component strength requirements for compatibility with existing accessories. It reliably adapts to accessories, and its moving contact opens quickly. Background Technology

[0002] At high current levels, DC circuit breakers require very high contact pressure. If the existing DC product mechanism with single-axis fixed-axis rotation and split-axis fixed-axis rotation is used, the tripping force will increase proportionally, making it impossible to use existing accessory products. At the same time, the existing single-contact structure is insufficient for limiting the required large short-circuit current. Summary of the Invention

[0003] To address one or more deficiencies in the prior art, a DC circuit breaker is provided according to one aspect of this disclosure, the DC circuit breaker including a first housing and a second housing, the first housing and the second housing jointly defining a receiving space, in which a stationary contact assembly and a mechanism assembly are disposed, the mechanism assembly being movable between an open position and a closed position.

[0004] The mechanism components include a center plate and a moving contact assembly.

[0005] The central plate is rotatably supported on both sides by the first housing and the second housing, respectively.

[0006] The moving contact assembly is rotatably mounted on the center plate via a motion shaft disposed on the center plate.

[0007] During the rotation of the center plate relative to the first housing and the second housing, the moving contact assembly is able to rotate relative to the center plate;

[0008] The elastic component of the moving contact assembly acts between the moving contact assembly and the first housing.

[0009] According to the foregoing aspects of this disclosure, the moving contact assembly includes a moving contact component.

[0010] The moving contact assembly is U-shaped.

[0011] The two moving contacts are connected in series via the U-shaped moving contact assembly.

[0012] The moving contact assembly is connected to the moving head assembly via fasteners.

[0013] According to the various aspects of this disclosure described above, the DC circuit breaker also includes an operating handle, a handle linkage, and a handle return spring.

[0014] The operating handle rotates about a handle axis disposed on the first housing.

[0015] The handle return spring is sleeved on the handle shaft.

[0016] During the movement of the operating handle, one end of the handle return spring acts on the handle spring limiting rib on the first housing, while the other end of the handle return spring always acts on the operating handle.

[0017] One end of the handle linkage is connected to the operating handle.

[0018] The other end of the handle linkage is connected to the mechanism assembly.

[0019] According to the various aspects described above in this disclosure, the mechanism component also includes a release hook.

[0020] The trip hook is provided with a trip hook through hole, a trip hook through hole groove, a trip hook torsion spring limiting part and a trip hook notch.

[0021] The other end of the handle linkage passes through the through-hole groove of the release hook.

[0022] The center plate is provided with a center plate first shaft and a center plate first stop.

[0023] The trip hook is rotatably mounted on the center plate through the engagement of the first shaft of the center plate with the through hole of the trip hook.

[0024] The first stop of the center plate can be fitted into the notch of the release hook.

[0025] In accordance with the foregoing aspects of this disclosure, a center plate blind groove is also provided on the center plate.

[0026] The other end of the handle link, which passes through the through-hole groove of the release hook, engages in the blind groove of the center plate.

[0027] According to the foregoing aspects of this disclosure, the center plate includes a center plate base and a first branch and a second branch extending from the center plate base.

[0028] The first branch and the second branch are arranged parallel to each other and separately.

[0029] According to the foregoing aspects of this disclosure, the first shaft of the center plate, the first stop block of the center plate, and the blind groove of the center plate are disposed on the first branch.

[0030] A central plate first support shaft is also provided on the first branch.

[0031] A second support shaft for the central plate is provided on the second branch.

[0032] The first support shaft and the second support shaft of the center plate are coaxially arranged.

[0033] The motion axis is connected between the first branch and the second branch.

[0034] The center plate is rotatably supported on the second housing and the first housing via the first support shaft and the second support shaft of the center plate, respectively.

[0035] According to the above aspects of this disclosure, a center plate gap stop is provided on the side of the second branch facing the first branch.

[0036] The center plate gap stop cooperates with the moving contact assembly to control the gap between the moving contact assembly and the stationary contact assembly.

[0037] In accordance with the foregoing aspects of this disclosure, a first branch trip plate support shaft is further provided on the first branch.

[0038] A second branch tripping sensor support shaft is also provided on the second branch.

[0039] The first branch trip plate support shaft and the second branch trip sensor support shaft are coaxially aligned.

[0040] According to the various aspects of this disclosure described above, the mechanism component also includes a trip plate and a trip sensor.

[0041] A trip plate slot is provided on the trip plate.

[0042] A trip sensor hook is provided on one end of the trip sensor.

[0043] The trip sensor hook engages in the trip plate slot, thereby connecting the trip sensor and the trip plate into one unit.

[0044] In accordance with the foregoing aspects of this disclosure, a trip plate protrusion is also provided on the trip plate.

[0045] A through hole for the protrusion is provided in the protrusion of the trip plate.

[0046] The first branch trip plate support shaft passes through and engages with the protruding post through hole, thereby enabling the trip plate to rotate relative to the center plate.

[0047] According to the foregoing aspects of this disclosure, a sensor through hole and a sensor protrusion are provided on the other end of the tripping sensor.

[0048] The second branch trip sensor support shaft passes through and engages with the sensor through hole, thereby enabling the trip sensor and the trip plate to rotate integrally relative to the center plate.

[0049] In accordance with the foregoing aspects of this disclosure, a trip plate locking surface is also provided on the trip plate.

[0050] A release hook locking surface is provided on the release hook.

[0051] When the mechanism is in the open position, the locking surface of the trip hook does not contact the locking surface of the trip plate.

[0052] During the movement of the mechanism assembly from the open position to the closed position, the locking surface of the trip hook begins to contact the locking surface of the trip plate.

[0053] When the mechanism assembly is in the closed position, the locking surface of the trip hook remains in contact with the locking surface of the trip plate.

[0054] According to the various aspects of this disclosure described above, the moving contact assembly includes a support skirt, a support connecting portion, and a support tension spring connecting portion.

[0055] The bracket connecting part and the bracket tension spring connecting part are located between the first branch and the second branch.

[0056] The moving contact assembly is partially disposed in the skirt of the support.

[0057] A connecting hole is provided in the bracket connecting part, and the motion shaft passes through the connecting hole.

[0058] One end of the tension spring of the moving contact assembly is connected to the tension spring connection of the bracket.

[0059] The other end of the tension spring of the moving contact assembly is connected to the tension spring spindle disposed on the first housing.

[0060] According to the various aspects of this disclosure described above, the moving contact assembly also includes a support quick-closing mating portion.

[0061] The quick-closing fitting part of the bracket is located between the first branch and the second branch.

[0062] The quick-closing fitting part of the bracket engages with a quick-closing structure disposed inside the first housing, thereby, during the closing process of the moving contact assembly, the quick-closing structure applies a force to the quick-closing fitting part of the bracket to accelerate the closing of the moving contact assembly.

[0063] According to the above aspects of this disclosure, the quick-closing fitting part of the bracket is provided with a bracket opening gap fitting surface.

[0064] The center plate gap stop block engages with the bracket gap mating surface to control the gap between the moving contact assembly and the stationary contact assembly.

[0065] According to the above aspects of this disclosure, a drive torsion spring engaging protrusion is provided on the first housing.

[0066] The drive torsion spring is provided with a blind hole for the mating protrusion.

[0067] The second support shaft of the central plate is rotatably inserted into the blind hole of the mating protrusion.

[0068] A drive torsion spring is sleeved on the outer surface of the drive torsion spring mating protrusion.

[0069] One end of the drive torsion spring acts on the drive torsion spring housing limiting rib provided in the first housing and contacts the rib position of the first housing.

[0070] When the mechanism is in the open position, the other end of the drive torsion spring is not in contact with the trip sensor.

[0071] During the movement of the mechanism assembly from the open position to the closed position, the sensor protrusion of the trip sensor acts on the other end of the drive torsion spring.

[0072] According to the above aspects of this disclosure, a release hook torsion spring limiting part is provided on the release hook.

[0073] A trip plate torsion spring limiting part is provided on the trip plate.

[0074] A tripping torsion spring is sleeved on the outer surface of the tripping plate protrusion of the tripping plate.

[0075] One end of the tripping torsion spring is connected to the torsion spring limiting part of the tripping plate.

[0076] The other end of the tripping torsion spring acts on the tripping hook torsion spring limiting part.

[0077] During the movement of the moving contact assembly from the open position to the closed position, the force applied by the tripping torsion spring keeps the locking surface of the tripping hook in contact with the locking surface of the tripping plate.

[0078] According to the various aspects of this disclosure described above, the DC circuit breaker also includes a front panel and a fault indicator.

[0079] A fault display window is provided on the front panel.

[0080] The front panel is connected to the first housing and the second housing via a panel connection slot provided on the first housing and the second housing.

[0081] The fault indicator can slide relative to the first housing and the second housing by engaging with fault component connection slots provided in the first housing and the second housing.

[0082] The front panel covers the fault indicator.

[0083] According to the foregoing aspects of this disclosure, a trip hook failure stop is provided on the trip hook.

[0084] A center plate fault stop is provided on the center plate.

[0085] An indicator tongue is provided on the fault indicator.

[0086] Under normal operating conditions of the DC circuit breaker, neither the trip hook fault stop block nor the center plate fault stop block will push the indicator tongue.

[0087] When the DC circuit breaker experiences a magnetic or thermal fault, the trip hook fault stop will push the indicator tongue, causing the fault indicator to appear in the fault display window.

[0088] When the magnetic or thermal fault of the DC circuit breaker is eliminated, the center plate fault stop will push the indicator tongue, so that the fault indicator will no longer appear in the fault display window.

[0089] According to the foregoing aspects of this disclosure, the quick-closing structure includes a closing cam and a closing cam return spring rotatably mounted relative to the first housing.

[0090] The closed cam includes a cam mating portion with an arcuate surface and a cam recess.

[0091] The closed cam return spring is sleeved on the tension spring main shaft.

[0092] One end of the closed cam return spring acts on the first housing.

[0093] The other end of the closed cam return spring abuts against the recess of the cam.

[0094] According to the foregoing aspects of this disclosure, the quick-closing mating portion of the moving contact assembly of the DC circuit breaker has a first mating surface and a second mating surface.

[0095] The first mating surface and the second mating surface are connected together by the arc surface of the bracket.

[0096] According to the above aspects of this disclosure, when the moving contact assembly of the DC circuit breaker is in the open position relative to the stationary contact assembly of the DC circuit breaker, under the action of the closing cam return spring, the closing cam abuts against the inner surface of the first housing, and the arcuate surface of the cam mating part does not contact the first mating surface.

[0097] As the moving contact assembly moves from the open position to the closed position relative to the stationary contact assembly, the first mating surface and the arcuate surface of the cam mating part come into frictional contact, and the contact position between them changes as the moving contact assembly rotates. This frictional contact slows down the closing movement of the moving contact assembly.

[0098] When the arc surface of the cam mating part disengages from the first mating surface and comes into contact with the arc surface of the bracket, the moving contact assembly applies a force to the closing cam, causing the closing cam to press against the first housing.

[0099] When the arc surface of the cam mating part disengages from the arc surface of the bracket, under the torque generated by the pressure of the arc surface of the bracket, the closing cam quickly impacts the second mating surface, thereby causing the moving contact assembly to quickly reach the closed position. At this time, the closing cam return spring is in a compressed state.

[0100] As the operating handle of the DC circuit breaker continues to close, the arcuate surface of the cam mating part rests on the second mating surface.

[0101] In the DC circuit breaker according to this disclosure, the mechanism adopts a double-acting contact series structure. Under the action of the tension spring, the contacts are quickly opened, the arc is stretched twice, and the current limiting capacity meets the breaking requirements.

[0102] In the DC circuit breaker according to this disclosure, the moving contact assembly's moving shaft is designed on a central plate with a fixed axis. By adjusting the lever arm of the tension spring on the moving shaft and the lever arm of the moving shaft on the first and second support shafts of the central plate, the tripping force can meet the requirements. Under the action of the tension spring, the moving contact opens at a high speed.

[0103] To reduce tripping force and increase release force, a driving torsion spring with a special operating state is designed in the DC circuit breaker according to this disclosure: initially installed on the first housing, when the product is closed to a certain angle, the trip sensor contacts one end of the driving torsion spring. The driving torsion spring acts on the first housing and the trip sensor until the product is fully closed. The force of the driving torsion spring is reasonably designed to ensure that the product does not slip during the closing process. When the product is opened, before the product trips on other poles or accessories, the driving torsion spring continues to act on the trip sensor, its function being to increase the release force of the product on that pole and reduce the tripping force.

[0104] The DC circuit breaker disclosed herein meets the requirements of high contact pressure and low tripping force, ensuring that after interrupting the short-circuit current, the mechanism reliably trips under the influence of dust and other contaminants.

[0105] In the DC circuit breaker according to this disclosure, since the fast-closing structure is not mounted on the operating handle, the functional surfaces of the fast-closing structure and the moving contact assembly do not occupy the space of the magnetic assembly. This allows for greater design flexibility in the size of the magnetic assembly and the arrangement of components to meet the product's requirements for high breaking performance.

[0106] The quick-closing structure according to this disclosure requires minimal space, saving space. The moving contact assembly remains constantly in motion during quick-closing, reducing friction on the working surface and lowering material strength requirements. The quick-closing function increases product release force and reliably drives multi-pole products and accessory products. The quick-closing structure according to this disclosure is easy to assemble, simple in structure, and reliable in performance. Achieving quick-closing effectively reduces contact erosion and extends lifespan.

[0107] Thus, in order to provide a better understanding of the detailed description herein and to better recognize the contribution of this disclosure to the prior art, the contents of this disclosure have been summarized quite broadly. Embodiments of this disclosure will, of course, be described below and will form the subject matter of the appended claims.

[0108] Similarly, those skilled in the art will recognize that the concepts upon which this disclosure is based can be readily used as the basis for designing other structures, methods, and systems for carrying out several purposes of this disclosure. Therefore, it is important that the appended claims be considered to include such equivalent structures, provided they do not exceed the spirit and scope of this disclosure. Attached Figure Description

[0109] The advantages of this disclosure will be more clearly demonstrated by the accompanying drawings, which will provide a better understanding of the present disclosure. The drawings described herein are for illustrative purposes only, representing selected embodiments and not all possible implementations, and are not intended to limit the scope of this disclosure.

[0110] Figure 1 The interior of a DC circuit breaker according to this disclosure is shown, with the mechanism assembly in the open position;

[0111] Figure 2 The interior of a DC circuit breaker according to this disclosure is shown, with the mechanism assembly in the closed position;

[0112] Figure 3 The relative positions of the operating handle, handle linkage, and moving contact assembly in the open position, according to this disclosure, are shown.

[0113] Figure 4 The relative positions of the operating handle, handle linkage, and moving contact assembly in the closed position are shown according to this disclosure;

[0114] Figure 5 and Figure 6 The central panel is shown in accordance with this disclosure;

[0115] Figure 7 and Figure 8 This illustrates the release hook according to this disclosure;

[0116] Figure 9 and Figure 10 This shows the trip plate according to the present disclosure;

[0117] Figure 11 and Figure 12 This illustrates a moving contact assembly according to the present disclosure;

[0118] Figure 13 and Figure 14 This illustrates a tripping sensor according to the present disclosure;

[0119] Figure 15 The diagram illustrates a moving contact assembly, a tension spring, and a moving contact assembly according to this disclosure;

[0120] Figure 16 and Figure 17 The relative positions of the center plate and the moving contact assembly are shown in the open and closed states, respectively.

[0121] Figure 18 and Figure 19 The relative positions of the center plate, trip plate, and moving contact assembly are shown in the open and closed states, respectively.

[0122] Figure 20 and Figure 21 The relative positions of the center plate, trip hook, trip plate, and moving contact assembly are shown in the open and closed states, respectively.

[0123] Figure 22 and Figure 23 The relative positional relationships of the center plate, trip plate, and moving contact assembly in the open and closed states are shown respectively, with particular emphasis on the mating surfaces of the trip hook and the trip plate;

[0124] Figure 24 and Figure 25 The relative positions of the center plate, trip sensor, and moving contact assembly in the open and closed states are shown in the planar side view, respectively.

[0125] Figure 26 and Figure 27 The relative positions of the center plate, trip hook, trip plate, trip sensor and moving contact assembly in the open and closed states are shown in a three-dimensional view.

[0126] Figure 28 and Figure 29 The states of the drive torsion spring and the handle return spring are shown in the open and closed states, respectively.

[0127] Figure 30 and Figure 31 Showing the front panel according to this disclosure;

[0128] Figure 32 and Figure 33 Showing fault indicators according to this disclosure;

[0129] Figure 34 The panel connection slot and fault component connection slot provided on the first housing and the second housing according to the present disclosure are shown.

[0130] Figure 35 This illustrates the engagement of the fault indicator with the first housing according to the present disclosure;

[0131] Figure 36 The relative positions of the quick-closing assembly and the moving contact assembly in the open position, according to this disclosure, are shown.

[0132] Figure 37 The relative positions of the quick-closing assembly and the moving contact assembly in the closed state, according to this disclosure, are shown.

[0133] Figure 38 The internal structure of the first housing according to this disclosure is shown. Detailed Implementation

[0134] The following is combined Figures 1 to 37 The specific implementation details are based on the content of this disclosure.

[0135] like Figure 1 and Figure 2As shown, according to one embodiment of this disclosure, a DC circuit breaker 1 is provided, the DC circuit breaker 1 including a first housing 2 and a second housing 3 (see...). Figure 34 The first housing 2 and the second housing 3 together define an accommodating space, in which a stationary contact assembly 4 and a mechanism assembly 5 are disposed. The mechanism assembly 5 can be in an open position (e.g., Figure 1 As shown, i.e., the open state) and the closed position (as shown). Figure 2 As shown, the movement occurs between closed states.

[0136] Figure 1 and Figure 3 The magnetic components are not shown. Figure 2 and Figure 4 The magnetic assembly is shown. Figure 3 and Figure 4 The first housing 2 is not shown in the image.

[0137] The mechanism component 5 includes a center plate 6 and a moving contact component 7.

[0138] The central plate 6 is rotatably supported on both sides by the first housing 2 and the second housing 3, respectively.

[0139] The moving contact assembly 7 is connected to a motion shaft 8 (see) disposed on the central plate 6. Figure 17 It is rotatably mounted on the central plate 6.

[0140] During the rotation of the center plate 6 relative to the first housing 2 and the second housing 3, the moving contact assembly 7 is able to rotate relative to the center plate 6.

[0141] The elastic component of the mechanism acts between the moving contact assembly 7 and the first housing 2.

[0142] According to the above embodiments of this disclosure, the mechanism component 5 further includes a moving contact component 9.

[0143] The moving contact assembly 9 is U-shaped.

[0144] like Figure 15 As shown, the two moving contacts 9-1 are connected in series via the U-shaped moving contact assembly 9.

[0145] The moving contact assembly 9 is connected to the moving contact assembly 7 via fastener 9-3.

[0146] According to the various embodiments described above in this disclosure, the DC circuit breaker 1 further includes an operating handle 10, a handle linkage 11, and a handle return spring 12.

[0147] The operating handle 10 rotates around the handle shaft 13 disposed on the first housing 2.

[0148] The handle return spring 12 is sleeved on the handle shaft 13.

[0149] During the movement of the operating handle 10, one end of the handle return spring 12 acts on the handle spring limiting rib (not shown) on the first housing 2, and the other end of the handle return spring 12 always acts on the operating handle 10.

[0150] One end of the handle linkage 11 is connected to the operating handle 10.

[0151] The other end of the handle link 11 is connected to the mechanism assembly 5.

[0152] According to the various embodiments described above in this disclosure, such as Figure 7 and Figure 8 As shown, the mechanism component 5 also includes a release hook 14.

[0153] The trip hook 14 is provided with a trip hook through hole 14-1, a trip hook through hole groove 14-2, a trip hook torsion spring limiting part 14-3 and a trip hook notch 14-4.

[0154] The other end of the handle connecting rod 11 passes through the release hook through hole groove 14-2.

[0155] The center plate 6 is provided with a center plate first shaft 6-1 and a center plate first stop 6-2.

[0156] The trip hook 14 is rotatably mounted on the center plate 6 through the cooperation between the first shaft 6-1 of the center plate and the through hole 14-1 of the trip hook.

[0157] The first stop 6-2 of the center plate can be fitted into the notch 14-4 of the release hook.

[0158] According to the various embodiments described above, a center plate blind groove 6-3 is further provided on the center plate 6.

[0159] The other end of the handle connecting rod 11, which passes through the through hole groove 14-2 of the release hook, is fitted into the blind groove 6-3 of the center plate.

[0160] According to the various embodiments described above in this disclosure, such as Figure 5 and Figure 6 As shown, the center plate 6 includes a center plate base 6-4 and a first branch 6-5 and a second branch 6-6 extending from the center plate base 6-4.

[0161] The first branch 6-5 and the second branch 6-6 are arranged parallel to each other and separately.

[0162] According to the above embodiments of this disclosure, the first shaft 6-1 of the center plate, the first stop block 6-2 of the center plate, and the blind groove 6-3 of the center plate are disposed on the first branch 6-5.

[0163] A central plate first support shaft 6-7 is also provided on the first branch 6-5.

[0164] A central plate second support shaft 6-8 is provided on the second branch 6-6.

[0165] The first support shaft 6-7 and the second support shaft 6-8 of the center plate are coaxially arranged.

[0166] The motion axis 8 is connected between the first branch 6-5 and the second branch 6-6.

[0167] The center plate 6 is rotatably supported on the second housing 3 and the first housing 2 via the first support shaft 6-7 and the second support shaft 6-8 of the center plate, respectively.

[0168] According to the above embodiments of the present disclosure, a center plate gap stop 6-6-1 is provided on the side of the second branch 6-6 facing the first branch 6-5.

[0169] The center plate opening distance stop 6-6-1 cooperates with the moving contact assembly 7 to control the opening distance between the mechanism assembly 5 (moving contact) and the stationary contact assembly 4 (stationary contact).

[0170] According to the various embodiments of this disclosure described above, a first branch trip plate support shaft 6-9 is further provided on the first branch 6-5.

[0171] A second branch tripping sensor support shaft 6-10 is also provided on the second branch 6-6.

[0172] The first branch trip plate support shaft 6-9 and the second branch trip sensor support shaft 6-10 are coaxially arranged.

[0173] According to the various embodiments described above in this disclosure, the mechanism component 5 further includes a trip plate 15 (such as...). Figure 9 and Figure 10 ) and trip sensor 16 (e.g. Figure 13 and Figure 14 ).

[0174] A trip plate slot 15-1 is provided on the trip plate 15.

[0175] A trip sensor hook 16-1 is provided on one end of the trip sensor 16.

[0176] The trip sensor hook 16-1 is fitted into the trip plate slot 15-1, thereby connecting the trip sensor 16 and the trip plate 15 into one unit.

[0177] According to the various embodiments described above, a trip plate protrusion 15-2 is further provided on the trip plate 15.

[0178] A through hole 15-2-1 is provided in the protrusion 15-2 of the trip plate.

[0179] The first branch trip plate support shaft 6-9 passes through the protruding through hole 15-2-1 and engages therein, thereby enabling the trip plate 15 to rotate relative to the center plate 6.

[0180] According to the various embodiments of this disclosure described above, a sensor through hole 16-2 and a sensor protrusion 16-3 are provided on the other end of the tripping sensor 16.

[0181] The second branch trip sensor support shaft 6-10 passes through the sensor through hole 16-2 and engages therein, thereby enabling the trip sensor 16 and the trip plate 15 to rotate integrally relative to the center plate 6.

[0182] According to the various embodiments described above in this disclosure, such as Figure 22 and Figure 23 As shown, a tripping plate locking surface 15-3 is also provided on the tripping plate 15.

[0183] A release hook locking surface 14-5 is provided on the release hook 14.

[0184] When the mechanism component 5 is in the open position, such as Figure 22 As shown, the locking surface 14-5 of the trip hook does not contact the locking surface 15-3 of the trip plate.

[0185] During the movement of the mechanism assembly 5 from the open position to the closed position, the trip hook locking surface 14-5 begins to contact the trip plate locking surface 15-3, as... Figure 23 As shown.

[0186] When the mechanism component 5 is in the closed position, the release hook locking surface 14-5 remains in contact with the release plate locking surface 15-3.

[0187] According to the various embodiments described above in this disclosure, such as Figure 15 and Figure 16 As shown, the moving contact assembly 7 includes a support skirt 7-1, a support connecting part 7-2, and a support tension spring connecting part 7-3 (these three parts constitute the moving contact support).

[0188] The bracket connecting part 7-2 and the bracket tension spring connecting part 7-3 are located between the first branch 6-5 and the second branch 6-6.

[0189] The moving contact assembly 8 is partially disposed in the support skirt 7-1.

[0190] A connecting hole 7-2-1 is provided in the bracket connecting part 7-2, and the motion shaft 8 passes through the connecting hole 7-2-1.

[0191] The elastic component includes, but is not limited to, the tension spring 17. One end of the tension spring 17 of the mechanism assembly 5 is connected to the tension spring connection 7-3 of the bracket.

[0192] The other end of the tension spring 17 of the mechanism component 5 is connected to the tension spring spindle 18 disposed on the first housing 2.

[0193] According to the various embodiments described above in this disclosure, the moving contact assembly 7 further includes a support quick-closing mating part 7-4.

[0194] The quick-closing fitting part 7-4 of the bracket is located between the first branch 6-5 and the second branch 6-6.

[0195] The quick-closing fitting part 7-4 of the bracket engages with a quick-closing structure disposed inside the first housing 2, thereby, during the closing process of the mechanism assembly 5, the quick-closing structure applies a force to the quick-closing fitting part 7-4 of the bracket to accelerate the closing of the mechanism assembly 5.

[0196] According to the various embodiments of the present disclosure described above, a bracket opening gap mating surface 7-4-1 is provided in the bracket quick-closing mating part 7-4.

[0197] The center plate opening gap stop 6-6-1 cooperates with the bracket opening gap mating surface 7-4-1, thereby controlling the opening gap between the mechanism component 5 and the stationary contact component 4.

[0198] According to the various embodiments described above in this disclosure, such as Figure 38 As shown, a drive torsion spring engagement protrusion 2-1 is provided on the first housing 2.

[0199] The drive torsion spring is provided with a blind hole 2-1-1 for the mating protrusion 2-1.

[0200] The second support shaft 6-8 of the central plate is rotatably inserted into the blind hole 2-1-1 of the mating protrusion.

[0201] like Figure 28As shown, a drive torsion spring 19 is sleeved on the outer surface of the drive torsion spring mating protrusion 2-1.

[0202] One end of the drive torsion spring 19 acts on the drive torsion spring housing limiting rib provided in the first housing 2.

[0203] When the mechanism assembly 5 is in the open position, the other end of the drive torsion spring 19 is not in contact with the trip sensor 16, such as Figure 28 As shown.

[0204] During the movement of the mechanism assembly 5 from the open position to the closed position, the sensor protrusion 16-3 of the trip sensor 16 acts on the other end of the drive torsion spring 19, as follows. Figure 29 As shown.

[0205] According to the various embodiments described above, a release hook torsion spring limiting part 14-3 is provided on the release hook 14.

[0206] A trip plate torsion spring limiting part 15-4 is provided on the trip plate 15.

[0207] A tripping torsion spring 20 is sleeved on the outer surface of the tripping plate protrusion 15-2 of the tripping plate 15.

[0208] One end of the tripping torsion spring 20 is connected to the torsion spring limiting part 15-4 of the tripping plate.

[0209] The other end of the tripping torsion spring 20 acts on the tripping hook torsion spring limiting part 14-3.

[0210] During the movement of the mechanism assembly 5 from the open position to the closed position, the force applied by the tripping torsion spring 20 keeps the tripping hook locking surface 14-5 in contact with the tripping plate locking surface 15-3.

[0211] According to the various embodiments described above in this disclosure, such as Figures 30 to 35 As shown, the DC circuit breaker also includes a front panel 21 and a fault indicator 22.

[0212] A fault display window 21-1 is provided on the front panel 21.

[0213] The front panel 21 is connected to the first housing 2 and the second housing 3 via a panel connection slot 23 provided on the first housing 2 and the second housing 3.

[0214] The fault indicator 22 (e.g., via its elastic arm 22-2) is able to slide relative to the first housing 2 and the second housing 3 by engaging with the fault component connection slot 24 provided in the first housing 2 and the second housing 3.

[0215] The front panel cover 21 covers the fault indicator 22.

[0216] According to the various embodiments described above, a trip hook failure stop 14-6 is provided on the trip hook 14.

[0217] A center plate fault stop 6-11 is provided on the center plate 6.

[0218] An indicator tongue 22-1 is provided on the fault indicator 22.

[0219] Under normal operating conditions, neither the trip hook fault stop 14-6 nor the center plate fault stop 6-11 will push the indicator tongue 22-1.

[0220] When the DC circuit breaker 1 experiences a magnetic or thermal fault, the trip hook fault stop 14-6 will push the indicator tongue 22-1, thereby causing the fault indicator 22 to appear in the fault display window 21-1.

[0221] When the magnetic or thermal fault of the DC circuit breaker 1 is eliminated, the center plate fault stop 6-11 will push the indicator tongue 22-1, so that the fault indicator 22 will no longer appear in the fault display window 21-1.

[0222] According to the various embodiments described above in this disclosure, such as Figure 36 and Figure 37 As shown, the quick-closing structure includes a closing cam 25 and a closing cam return spring 26 that are rotatably mounted relative to the first housing 2.

[0223] The closed cam 25 includes a cam mating portion 25-1 with an arcuate surface and a cam recess 25-2.

[0224] The closed cam return spring 26 is sleeved on the tension spring main shaft 18.

[0225] One end of the closed cam return spring 26 acts on the first housing 2.

[0226] The other end of the closed cam return spring 26 abuts against the cam recess 25-2.

[0227] According to the various embodiments described above in this disclosure, such as Figure 11 and Figure 12 As shown, the quick-closing mating part 7-4 of the moving contact assembly 7 of the DC circuit breaker 1 has a first mating surface 7-4-2 and a second mating surface 7-4-3.

[0228] The first mating surface 7-4-2 and the second mating surface 7-4-3 are connected together by the arc surface 7-4-4 of the bracket.

[0229] According to the above embodiments of this disclosure, when the mechanism assembly 5 of the DC circuit breaker 1 is in the open position relative to the stationary contact assembly 4 of the DC circuit breaker 1, under the action of the closing cam return spring 26, the closing cam 25 abuts against the inner surface of the first housing 2, and the arcuate surface of the cam mating part 25-1 does not contact the first mating surface 7-4-2, as... Figure 36 As shown.

[0230] As the mechanism assembly 5 moves from the open position to the closed position relative to the stationary contact assembly 4, the first mating surface 7-4-2 and the arcuate surface of the cam mating part 25-1 come into frictional contact, and the contact position between them changes as the moving contact assembly 7 rotates. This frictional contact slows down the closing movement of the mechanism assembly 5.

[0231] When the arc surface of the cam mating part 25-1 disengages from the first mating surface 7-4-2 and comes into contact with the arc surface 7-4-4 of the bracket, the moving contact assembly 7 applies a force to the closing cam 25, causing the closing cam 25 to press against the first housing 2.

[0232] When the arc surface of the cam mating part 25-1 disengages from the arc surface 7-4-4 of the bracket, under the torque generated by the pressure of the arc surface 7-4-4 of the bracket, the closing cam 25 quickly strikes the second mating surface 7-4-3, thereby causing the mechanism assembly 5 to quickly reach the closed position. At this time, the closing cam return spring 28 is in a compressed state.

[0233] As the operating handle 10 of the DC circuit breaker 1 continues to close, the arcuate surface of the cam mating part 25-1 rests on the second mating surface 7-4-3, as... Figure 37 As shown.

[0234] like Figures 18 to 27 As shown, the DC circuit breaker according to this disclosure is in the open and closed states:

[0235] 1. One end of the drive torsion spring 19 acts on the drive torsion spring housing limit rib of the first housing 2, while the other end of the drive torsion spring 19 does not contact the trip sensor 16.

[0236] 2. The trip hook 14 and the trip plate 15 are respectively mounted on two pillars of the center plate 6. One end of the handle connecting rod 11 is connected to the operating handle 10, and the other end of the handle connecting rod 11 is connected to the trip hook (trip hook through hole groove 14-2) and the center plate (center plate blind groove 6-3).

[0237] 3. In the open state, the operating handle 10 contacts the rib on the first housing 2, and the center plate 6 contacts the rib on the second housing 3. One end of the tripping torsion spring 20 is connected to the tripping plate 15, and the other end of the tripping torsion spring 20 is connected to the tripping hook 14. The function of the tripping torsion spring 20 is to provide a restoring action, so that after the tripping plate 15 is tripped, during the closing process of the DC circuit breaker, the tripping hook locking surface 14-5 of the tripping hook 14 contacts the tripping plate locking surface 15-3 of the tripping plate 15.

[0238] 4. When the DC circuit breaker is in the open state, the trip hook locking surface 14-5 of the trip hook 14 and the trip plate locking surface 15-3 of the trip plate 15 are not in contact.

[0239] 5. A trip plate slot 15-1 is provided on the trip plate 15; a trip sensor hook 16-1 is provided on one end of the trip sensor 16; the trip sensor hook 16-1 is engaged in the trip plate slot 15-1, thereby connecting the trip sensor 16 and the trip plate 15 into one unit; a first branch trip plate support shaft 6-9 is also provided on the first branch 6-5; a second branch trip sensor support shaft 6-10 is also provided on the second branch 6-6; the first branch trip plate support shaft 6-9 and the second branch trip sensor support shaft 6-10 are coaxially arranged; the trip sensor 16 and the trip plate 15 can rotate integrally relative to the center plate 6.

[0240] 6. One end of the tension spring 17 of the mechanism component 5 is connected to the tension spring connection part 7-3 of the bracket; the other end of the tension spring 17 of the mechanism component 5 is connected to the tension spring main shaft 18 disposed on the first housing 2.

[0241] 7. The opening distance is controlled by structural features on the center plate 6 and the moving contact assembly 7, which is connected to the center plate 6 via a motion shaft 8. The motion shaft 8 is tightly connected to the center plate 6, and the motion shaft 8 is clearance-fitted with the moving contact assembly 7, thereby enabling the moving contact assembly 7 to rotate around the motion shaft 8.

[0242] 8. The quick-closing structure is assembled via a shaft 29 mounted on the first housing 2, and the tension spring 17 is assembled via a tension spring main shaft 18 mounted on the first housing. A closing cam return spring 26 is mounted below the tension spring main shaft 18.

[0243] 9. The double contact 9-1 is soldered to the moving contact assembly 9, which is riveted to the moving contact assembly 7, for example but not limited to, by copper rivets, to meet the high breaking performance requirements of the product.

[0244] During the closing process, such as Figures 1 to 2 As shown, when the operating handle 10 is rotated clockwise, the handle connecting rod 11 contacts the trip hook through-hole groove 14-2 of the trip hook and the center plate blind groove 6-3 of the center plate 6. The trip hook locking surface 14-5 of the trip hook 14 contacts the trip plate locking surface 15-3 of the trip plate 15. When the operating handle 10 is rotated through a certain angle, the drive torsion spring contacts the trip sensor.

[0245] Before rapid closure, the operating handle, handle linkage, trip hook, trip plate, center plate, and moving contact assembly move together. Once rapid closure begins, the operating handle, handle linkage, trip hook, trip plate, and center plate move together again, while the moving contact assembly moves around the center plate at a slower speed. After rapid closure is achieved, the product closes.

[0246] If there is no quick-closing function, initially the operating handle, handle linkage, trip hook, trip plate, center plate, and moving contact assembly move together. After the moving and stationary contacts close, but before the product closes, the operating handle, handle linkage, trip hook, trip plate, and center plate move together, the moving contact assembly rotates around the motion axis, and the moving contact slides on the stationary contact.

[0247] During the opening process, the operating handle is rotated counterclockwise. Under the force of the tension spring, the moving contact assembly rotates around the motion axis and the center plate, and comes into contact with the feature controlling the opening distance. Subsequently, the entire mechanism moves counterclockwise together under the action of the handle's return spring, and the product opens.

[0248] The foregoing disclosure provides illustrations and descriptions, but is not intended to be exhaustive or to limit the embodiments to the precise forms disclosed. Modifications and variations can be made based on the above disclosure, or modifications and variations can be derived from the practice of the embodiments.

[0249] Even if a specific combination of features is recited in the claims and / or disclosed in the specification, such combinations are not intended to limit the disclosure of various embodiments. In fact, many of these features can be combined in ways not specifically recited in the claims and / or not specifically disclosed in the specification. Although each dependent claim listed below may depend directly on only one claim, the disclosure of various embodiments includes each dependent claim in combination with every other claim in the claim set.

[0250] Unless explicitly stated otherwise, no element, action, or instruction used herein should be construed as critical or necessary. Furthermore, as used herein, the articles “a” and “an” are intended to include one or more items and are interchangeable with “one or more.” Additionally, as used herein, the article “the” is intended to include one or more items referenced in combination with the article “the” and is interchangeable with “one or more.” Furthermore, as used herein, the term “set” is intended to include one or more items (e.g., related items, unrelated items, a combination of related and unrelated items, etc.) and is interchangeable with “one or more.” In case of intent only… Figure 1 In cases involving items, the phrase "only one" or similar language is used. Additionally, as used herein, the term "having" and its variations are intended to be open-ended terms. Furthermore, the phrase "based on" is intended to mean "at least partially based on," unless otherwise explicitly stated. Additionally, as used herein, the term "or" is intended to be inclusive when used in series and may be used interchangeably with "and / or," unless otherwise explicitly stated (e.g., if used in conjunction with "or" or "only one of them").

Claims

1. A DC circuit breaker, comprising a first housing and a second housing, the first housing and the second housing jointly defining a receiving space, wherein a stationary contact assembly and a mechanism assembly are disposed in the receiving space, the mechanism assembly being movable between an open position and a closed position, characterized in that, The mechanism components include a central plate and a moving contact assembly; The center plate includes a center plate base and a first branch and a second branch extending from the center plate base. The first branch and the second branch are parallel to each other and are separated. A first support shaft for the center plate is provided on the first branch, and a second support shaft for the center plate is provided on the second branch. The center plate is rotatably supported on the first housing and the second housing by the first support shaft and the second support shaft, respectively. The first support shaft and the second support shaft are coaxially arranged. The moving contact assembly is rotatably mounted on the center plate via a motion shaft disposed on the center plate. The motion shaft connects the first branch and the second branch, and the line containing the motion shaft is spaced apart from the line containing the first support shaft and the second support shaft of the center plate. During the rotation of the center plate relative to the first housing and the second housing, the moving contact assembly is able to rotate relative to the center plate; the tension spring of the mechanism assembly acts between the moving contact assembly and the first housing; A center plate gap stop is provided on the side of the second branch facing the first branch. The center plate gap stop cooperates with the moving contact assembly to control the gap between the moving contact assembly and the stationary contact assembly.

2. The DC circuit breaker according to claim 1, characterized in that, The moving contact assembly includes a moving contact point assembly; The moving contact assembly is U-shaped; The two moving contacts are connected in series via the U-shaped moving contact assembly; The moving contact assembly is connected to the moving head assembly via fasteners.

3. The DC circuit breaker according to claim 2, characterized in that, The DC circuit breaker also includes an operating handle, a handle linkage, and a handle return spring; The operating handle rotates about a handle shaft disposed on the first housing; The handle return spring is sleeved on the handle shaft; During the movement of the operating handle, one end of the handle return spring acts on the handle spring limiting rib on the first housing, and the other end of the handle return spring always acts on the operating handle; One end of the handle linkage is connected to the operating handle; The other end of the handle linkage is connected to the mechanism assembly.

4. The DC circuit breaker according to claim 3, characterized in that, The mechanism component also includes a release hook; The trip hook is provided with a trip hook through hole, a trip hook through hole groove, a trip hook torsion spring limiting part and a trip hook notch; The other end of the handle linkage passes through the through-hole groove of the release hook; A first axis and a first stop block of the center plate are provided on the center plate; The trip hook is rotatably mounted on the center plate through the cooperation between the first shaft of the center plate and the through hole of the trip hook; The first stop of the center plate can be fitted into the notch of the release hook.

5. The DC circuit breaker according to claim 4, characterized in that, A blind groove for the center plate is also provided on the center plate; The other end of the handle link, which passes through the through-hole groove of the release hook, engages in the blind groove of the center plate.

6. The DC circuit breaker according to claim 5, characterized in that, The first shaft of the center plate, the first stop block of the center plate, and the blind groove of the center plate are disposed on the first branch.

7. The DC circuit breaker according to claim 6, characterized in that, A first branch trip plate support shaft is also provided on the first branch; A second branch tripping sensor support shaft is also provided on the second branch; The first branch trip plate support shaft and the second branch trip sensor support shaft are coaxially aligned.

8. The DC circuit breaker according to claim 7, characterized in that, The mechanism also includes a trip plate and a trip sensor; A tripping plate slot is provided on the tripping plate; A trip sensor hook is provided on one end of the trip sensor; The trip sensor hook engages in the trip plate slot, thereby connecting the trip sensor and the trip plate into one unit.

9. The DC circuit breaker according to claim 8, characterized in that, The trip plate is also provided with a trip plate protrusion; A through hole for the protrusion is provided in the protrusion of the trip plate; The first branch trip plate support shaft passes through and engages with the protruding post through hole, thereby enabling the trip plate to rotate relative to the center plate.

10. The DC circuit breaker according to claim 9, characterized in that, A sensor through hole and a sensor protrusion are provided on the other end of the tripping sensor; The second branch trip sensor support shaft passes through and engages with the sensor through hole, thereby enabling the trip sensor and the trip plate to rotate integrally relative to the center plate.

11. The DC circuit breaker according to claim 10, characterized in that, The trip plate is also provided with a trip plate locking surface; A release hook locking surface is provided on the release hook; When the mechanism assembly is in the open position, the locking surface of the trip hook does not contact the locking surface of the trip plate; During the movement of the mechanism assembly from the open position to the closed position, the locking surface of the trip hook begins to contact the locking surface of the trip plate; When the mechanism assembly is in the closed position, the locking surface of the trip hook remains in contact with the locking surface of the trip plate.

12. The DC circuit breaker according to claim 7, characterized in that, The moving contact assembly includes a support skirt, a support connecting part, and a support tension spring connecting part; The bracket connecting part and the bracket tension spring connecting part are located between the first branch and the second branch; The moving contact assembly is partially disposed in the support skirt; A connecting hole is provided in the bracket connecting part, and the motion shaft passes through the connecting hole; One end of the tension spring of the moving contact assembly is connected to the tension spring connection of the bracket; The other end of the tension spring of the moving contact assembly is connected to the tension spring spindle disposed on the first housing.

13. The DC circuit breaker according to claim 12, characterized in that, The moving contact assembly also includes a quick-closing fitting part for the bracket; The quick-closing fitting part of the bracket is located between the first branch and the second branch; The quick-closing fitting part of the bracket engages with a quick-closing structure disposed inside the first housing, thereby, during the closing process of the moving contact assembly, the quick-closing structure applies a force to the quick-closing fitting part of the bracket to accelerate the closing of the moving contact assembly.

14. The DC circuit breaker according to claim 13, characterized in that, The quick-closing fitting part of the bracket is provided with a bracket opening gap fitting surface; The center plate gap stop block engages with the bracket gap mating surface to control the gap between the moving contact assembly and the stationary contact assembly.

15. The DC circuit breaker according to claim 11, characterized in that, A drive torsion spring engagement protrusion is provided on the first housing; The drive torsion spring is provided with a blind hole for the mating protrusion; The second support shaft of the central plate is rotatably inserted into the blind hole of the mating protrusion; A drive torsion spring is sleeved on the outer surface of the drive torsion spring mating protrusion; One end of the drive torsion spring acts on the drive torsion spring housing limiting rib provided in the first housing. When the moving contact assembly is in the open position, the other end of the drive torsion spring does not contact the tripping sensor, but contacts the rib of the first housing; During the movement of the mechanism assembly from the open position to the closed position, the protrusion of the trip sensor acts on the other end of the drive torsion spring.

16. The DC circuit breaker according to claim 11, characterized in that, A trip hook torsion spring limiting part is provided on the trip hook; A trip plate torsion spring limiting part is provided on the trip plate; A tripping torsion spring is sleeved on the outer surface of the tripping plate protrusion of the tripping plate; One end of the tripping torsion spring is connected to the torsion spring limiting part of the tripping plate; The other end of the tripping torsion spring acts on the tripping hook torsion spring limiting part; During the movement of the mechanism assembly from the open position to the closed position, the force applied by the trip torsion spring keeps the locking surface of the trip hook in contact with the locking surface of the trip plate.

17. The DC circuit breaker according to claim 11, characterized in that, The DC circuit breaker also includes a front panel and a fault indicator; A fault display window is provided on the front panel; The front panel is connected to the first housing and the second housing via a panel connection slot provided in the first housing and the second housing; The fault indicator can slide relative to the first housing and the second housing by engaging with a fault component connecting slot provided in the first housing and the second housing; The front panel covers the fault indicator.

18. The DC circuit breaker according to claim 17, characterized in that, A trip hook failure stop is provided on the trip hook; A center plate fault stop is provided on the center plate; An indicator tongue is provided on the fault indicator; Under normal operating conditions of the DC circuit breaker, neither the trip hook fault stop block nor the center plate fault stop block will push the indicator tongue. When the DC circuit breaker experiences a magnetic or thermal fault, the trip hook fault stop will push the indicator tongue, thereby causing the fault indicator to appear in the fault display window; When the magnetic or thermal fault of the DC circuit breaker is eliminated, the center plate fault stop will push the indicator tongue, so that the fault indicator will no longer appear in the fault display window.

19. The DC circuit breaker according to claim 13, characterized in that, The quick-closing structure includes a closing cam and a closing cam return spring that are rotatably mounted relative to the first housing; The closed cam includes a cam mating portion with an arcuate surface and a cam recess; The closed cam return spring is sleeved on the tension spring main shaft; One end of the closed cam return spring acts on the first housing; The other end of the closed cam return spring abuts against the recess of the cam.

20. The DC circuit breaker according to claim 19, characterized in that, The quick-closing mating part of the moving contact assembly of the DC circuit breaker has a first mating surface and a second mating surface; The first mating surface and the second mating surface are connected together by the arc surface of the bracket.

21. The DC circuit breaker according to claim 20, characterized in that, When the moving contact assembly of the DC circuit breaker is in the open position relative to the stationary contact assembly of the DC circuit breaker, under the action of the closing cam return spring, the closing cam abuts against the inner surface of the first housing, and the arc surface of the cam mating part does not contact the first mating surface; As the moving contact assembly moves from the open position to the closed position relative to the stationary contact assembly, the first mating surface and the arcuate surface of the cam mating part come into frictional contact, and the contact position between them changes as the moving contact assembly rotates. This frictional contact slows down the closing movement of the moving contact assembly. When the arc surface of the cam mating part disengages from the first mating surface and contacts the arc surface of the bracket, the moving contact assembly applies a force to the closing cam, causing the closing cam to press against the first housing. When the arc surface of the cam mating part disengages from the arc surface of the bracket, under the torque generated by the pressure of the arc surface of the bracket, the closing cam quickly strikes the second mating surface, thereby causing the moving contact assembly to quickly reach the closed position. At this time, the closing cam return spring is in a compressed state. As the operating handle of the DC circuit breaker continues to close, the arcuate surface of the cam mating part rests on the second mating surface.

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