A stationary contact assembly of a circuit breaker and a circuit breaker

Abstract

The application provides a static contact assembly of a circuit breaker and the circuit breaker, and the static contact assembly comprises a terminal plate and a magnetic conductor. The terminal plate comprises a first part and a second part, a through-hole groove is arranged on the first part, a first interval is arranged between the second part and the first part, and a static contact point is arranged on the upper surface of the second part opposite to the first part. The magnetic conductor comprises a bifurcated part, a connecting part and an insertion part connected in sequence, and the bifurcated part comprises two fork parts arranged at intervals along the width direction of the second part. The two fork parts are respectively located on the two sides of the static contact point, the connecting part of the magnetic conductor is located in the first interval, and the insertion part extends into the through-hole groove in a manner perpendicular to the plane where the first part is located. Through the scheme, the insertion part is arranged on the magnetic conductor, and the through-hole groove is arranged on the terminal plate of the static contact head, so that the positioning process of the magnetic conductor is simple, convenient and low in cost.

Description

Technical Field

[0001] This application relates to the field of low-voltage electrical appliances, and more particularly to a stationary contact assembly of a circuit breaker and a circuit breaker. Background Technology

[0002] Circuit breakers are commonly used to connect and disconnect current, and automatically cut off the circuit when a fault occurs, thus protecting power lines and loads. A circuit breaker consists of a stationary contact assembly and a moving contact assembly connected in the control circuit. The stationary contact assembly includes a stationary contact, and the moving contact assembly includes a moving contact. The process of connecting and disconnecting current is achieved through the contact or separation of the stationary and moving contacts. During the circuit breaker's disconnection process, a high-temperature, high-voltage arc is generated between the moving and stationary contacts. To control and guide the arc's movement, a magnetic conductor with a magnetic blowout function is typically added to the circuit breaker. This magnetic conductor is usually placed around the stationary contact, creating a strong magnetic field in the contact disconnection area, thereby accelerating the cooling and diffusion of the arc.

[0003] Currently, it is usually necessary to set threaded holes for positioning on the magnetic conductor or to set snap-fit ​​grooves on the stationary contact assembly so that the magnetic conductor can be correctly positioned around the stationary contact, thereby ensuring the magnetic blow-off effect of the magnetic conductor on the electric arc. However, the process of machining threaded holes or snap-fit ​​grooves is complex and costly. Utility Model Content

[0004] In view of this, this application provides a stationary contact assembly and a circuit breaker, which makes the process of setting the position of the magnetic conductor simple, convenient and low cost by providing an insertion part on the magnetic conductor and a through hole groove on the terminal block of the stationary contact.

[0005] The present application is described below from multiple aspects, and the implementation methods and beneficial effects of these aspects can be referred to each other.

[0006] In a first aspect, this application provides a stationary contact assembly for a circuit breaker, including a terminal block and a magnetic conductor.

[0007] Specifically, the terminal block includes a first part and a second part. The first part is provided with a through-hole groove, and a first gap is provided between the second part and the first part. The upper surface of the second part facing away from the first part is provided with a stationary contact.

[0008] Specifically, the magnetic conductor includes a forked portion, a connecting portion, and an insertion portion connected in sequence. The forked portion includes two forks spaced apart along the width direction of the second part. The magnetic conductor is positioned relative to the terminal block such that the two spaced-apart forks are located on either side of the stationary contact, the connecting portion of the magnetic conductor is located within the first interval, and the insertion portion extends into the through-hole groove perpendicular to the plane of the first part.

[0009] In the above structure, the through-hole groove provides a sliding path. After the insertion part is inserted into the through-hole groove, it can slide within the through-hole groove, thereby sliding the magnetic conductor so that the bifurcated part is positioned on both sides of the stationary contact in the width direction of the second part, without the need for positioning the magnetic conductor through threaded holes or snap-fit ​​grooves. This process of setting the position of the magnetic conductor is simple and convenient, requiring only insertion into the through-hole groove and then sliding the magnetic conductor, and it is also low in cost.

[0010] In one embodiment of this application, the length of the first part is longer than the length of the second part in the length direction, a portion of the through-hole groove is located in the portion of the first part opposite to the second part, and another portion of the through-hole groove is located in the portion of the first part that is longer than the second part.

[0011] In one embodiment of this application, the terminal block further includes an inclined portion and a wiring portion. The two ends of the inclined portion are respectively connected to the wiring portion and the first portion. The through-hole groove extends from the first portion to the inclined portion. The wiring portion is provided with a wiring hole and is located on the same side of the first portion as the second portion.

[0012] In the above structure, by extending the through-hole groove at least to the inclined portion, the installation process of the magnetic conductor is simpler; it can be inserted into the through-hole groove of the inclined portion and then the magnetic conductor can be slid.

[0013] In one embodiment of this application, the insertion portion is interference-fitted with the through-hole groove.

[0014] In one embodiment of this application, one end of the through-hole groove is fitted with the insertion portion, such that the stationary contact is located within the bifurcation portion of the magnetic conductor.

[0015] In the above structure, the sliding process of the magnetic conductor is simpler and the position of the bifurcation is more accurate. It only needs to slide to one end of the through hole groove.

[0016] In one embodiment of this application, the stationary contact assembly further includes an insulating member sleeved on the bifurcation portion and covering the portion of the upper surface of the second portion where the stationary contact is not provided, so as to fix the magnetic conductor to the terminal block.

[0017] In the above structure, the insulating component is sleeved on the bifurcation portion, thereby providing insulation to prevent damage to the magnetic conductor from the charge generated when the moving and stationary contacts disconnect. Furthermore, the insulating component can also cover the portion of the upper surface of the second part where the stationary contact is not located. This structure not only protects the second part from charge damage but also allows the magnetic conductor to be fixed to the terminal block.

[0018] In one embodiment of this application, the insulating member includes two spaced-apart first mounting grooves, each first mounting groove being fitted onto a corresponding fork, and the stationary contact being located between the two first mounting grooves.

[0019] In one embodiment of this application, each fork portion includes an outer side facing away from the other fork portion in the width direction of the first portion, and each of the first mounting grooves covers the surface of the fork portion other than the outer side side.

[0020] In the above structure, the first mounting groove does not need to cover the surface of the fork that is less affected by the electric arc, thereby reducing the processing cost of the insulating component.

[0021] In one embodiment of this application, each first mounting slot includes a snap-fit ​​protrusion, and each fork includes a snap-fit ​​groove, the snap-fit ​​protrusion engaging with the snap-fit ​​groove to securely connect the insulating member to the fork.

[0022] In one embodiment of this application, the insulating member further includes a second mounting groove, which is disposed opposite to the stationary contact along the length direction of the second portion, and the portion of the second portion without the stationary contact is disposed in the second mounting groove.

[0023] In one embodiment of this application, the magnetic conductor includes a plurality of first magnetic sheets of the same shape, which are spliced ​​and fixed together along the length of the first portion.

[0024] In one embodiment of this application, the first magnetic sheet is provided with a through hole, and the magnetic conductor includes a first rivet, which passes through the through hole of the plurality of first magnetic sheets to fix the plurality of first magnetic sheets.

[0025] In one embodiment of this application, the magnetic conductor includes a fixing bolt, each of the first magnetic sheets has a through hole, and the fixing bolt passes through the through hole of the plurality of first magnetic sheets to fix the plurality of first magnetic sheets.

[0026] In one embodiment of this application, the plurality of first magnetic sheets are bonded and fixed together.

[0027] In one embodiment of this application, the bifurcation portion includes a second magnetic sheet disposed on the connecting portion and located on both sides of the connecting portion in the width direction of the first portion.

[0028] In one embodiment of this application, the second magnetic sheet is provided with a first snap-fit ​​structure, and the connecting part is provided with a second snap-fit ​​structure at both ends of the first part in the width direction. The first snap-fit ​​structure and the second snap-fit ​​structure cooperate to fix the second magnetic sheet at both ends of the connecting part in the width direction of the first part.

[0029] In one embodiment of this application, the second magnetic sheet is bonded and fixed to both ends of the connecting portion in the width direction of the first portion.

[0030] In one embodiment of this application, the connecting portion is provided with positioning protrusions at both ends of the first portion in the width direction, and the second magnetic sheet is provided with a first positioning hole. The first positioning hole cooperates with the positioning protrusion to fix the second magnetic sheet at both ends of the connecting portion in the width direction of the first portion.

[0031] In one embodiment of this application, the insertion part includes a fixing part that extends out of the through-hole groove, and the fixing part is fixedly connected to the first part by riveting.

[0032] In one embodiment of this application, the insertion portion includes a fixing portion extending out of the through-hole groove, and the stationary contact assembly further includes a fixing member that cooperates with the fixing portion to fix the magnetic conductor.

[0033] In one embodiment of this application, the fastener includes a fixing plate disposed on the side of the first part away from the second part, and the fixing plate is provided with a groove, in which the fixing part is placed; and a second rivet, one end of which is fixedly connected to the fixing plate and the other end of which is fixedly connected to the fixing part.

[0034] In one embodiment of this application, the fixing member includes a bottom base with a second positioning hole, wherein the fixing part is placed in the second positioning hole to fix the magnetic conductor.

[0035] In one embodiment of this application, a limiting component is further included, disposed on the first part and located on both sides of the connecting portion in the length direction of the first part, so as to fix the magnetic conductor in the length direction of the first part.

[0036] Secondly, this application provides a circuit breaker, which includes: a moving contact assembly including a moving contact; and a stationary contact assembly as described in the first aspect and any possible implementation of the first aspect, wherein the stationary contact of the stationary contact assembly is disposed opposite to the moving contact. Attached Figure Description

[0037] Figure 1 A schematic diagram of a stationary contact assembly provided in an embodiment of this application is shown.

[0038] Figure 2 A side view of a junction box provided in an embodiment of this application is shown.

[0039] Figure 3 A schematic diagram of a magnetic conductor provided in an embodiment of this application is shown.

[0040] Figure 4 A schematic diagram of yet another stationary contact assembly provided in an embodiment of this application is shown.

[0041] Figure 5A This is a schematic diagram showing one perspective of the insulating member provided in an embodiment of this application.

[0042] Figure 5B This is a schematic diagram showing another perspective of the insulating element provided in the embodiments of this application.

[0043] Figure 6 A schematic diagram of another magnetic conductor provided in an embodiment of this application is shown.

[0044] Figure 7A A schematic diagram of another magnetic conductor provided in an embodiment of this application is shown.

[0045] Figure 7B A schematic diagram of another magnetic conductor provided in an embodiment of this application is shown.

[0046] Figure 8 A schematic diagram of another magnetic conductor provided in an embodiment of this application is shown.

[0047] Figure 9A A schematic diagram of another magnetic conductor provided in an embodiment of this application is shown.

[0048] Figure 9B A schematic diagram of another magnetic conductor provided in an embodiment of this application is shown.

[0049] Figure 10A A schematic diagram of a method for fixing a magnetic conductor using a fastener is shown in an embodiment of this application.

[0050] Figure 10B This illustration shows another schematic diagram of fixing a magnetic conductor with a fastener according to an embodiment of this application.

[0051] Figure 10C This illustration shows a schematic diagram of a method for fixing a magnetic conductor by riveting, according to an embodiment of this application.

[0052] Figure 11 A schematic diagram of the limiting component provided in an embodiment of this application is shown.

[0053] Figure label:

[0054] 10. Stationary contact assembly;

[0055] 11. Terminal block; 111. First part; 112. Second part; 113. Stationary contact; 114. Through-hole groove; 1141. Through-hole groove end face; 115. Bending part; 116. Inclined part; 117. Wiring part; 1171. Wiring hole;

[0056] 12. Magnetic conductor; 121. Forked portion; 1211. First fork portion; 12111. First outer surface; 12112. First end face; 12113. First top face; 1212. Second fork portion; 12121. Second inner surface; 12122. Second end face; 12123. Second top face; 1213. Second magnetic conductor; 12131. First snap-fit ​​structure; 12132. First positioning hole; 122. Connecting portion; 1221. Second snap-fit ​​structure; 1222. Positioning protrusion; 123. Insertion portion; 1231. End face of insertion portion; 1232. Fixing portion; 1233. Snap-fit ​​groove; 124. First magnetic conductor; 1241. Through hole; 125. First rivet; 126. Fixing bolt;

[0057] 13. Insulating component; 131. First mounting part; 1311. First side panel; 1312. Second side panel; 1313. Top panel; 1314. Inner panel; 1315. First mounting groove; 1316. Snap-fit ​​protrusion; 132. Second mounting part; 1321. Second mounting groove;

[0058] 14. Fastener; 141. Fixing plate; 1411. Groove; 142. Second rivet; 143. Bottom base; 1431. Second positioning hole;

[0059] 15. Limiting components. Detailed Implementation

[0060] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0061] First, the terms used in this application will be explained.

[0062] Stationary contact assembly and moving contact assembly: The stationary contact assembly and moving contact assembly are core components of a circuit breaker (or switching device) that work together in pairs to undertake the tasks of connecting, carrying, and breaking current. The stationary contact assembly includes a stationary contact, which is usually fixed to the circuit breaker housing or bracket and remains stationary. The moving contact assembly includes a moving contact, which is driven by a mechanical mechanism (such as a spring, linkage, etc.) to achieve contact or separation between the moving and stationary contacts.

[0063] Magnetic conductors: Magnetic conductors in circuit breakers (such as iron cores, yokes, and magnetic grid plates) are typically placed around the breaking areas of the moving and stationary contacts. Their main function is to control and guide the electric arc. Their core role is to generate a strong magnetic field in the contact breaking area, causing the magnetic field to exert an electromagnetic force on the arc and interfere with its movement, thereby improving arc extinguishing efficiency and protecting the equipment. The magnetic conductors usually have a forked section, consisting of two spaced-apart forks. The stationary contact is typically located in the space between the two forks, or in other words, the spaced-apart forks are usually located on either side of the stationary contact.

[0064] As mentioned in the background section, the current process of positioning the magnetic conductor (e.g., placing the bifurcated portion of the magnetic conductor on both sides of the stationary contact) is complex and costly. For example, the stationary contact assembly includes a terminal block. Threaded holes are provided on the terminal block and the magnetic conductor, and screws are used to fix the magnetic conductor and the terminal block together, ensuring that the bifurcated portion of the magnetic conductor is positioned precisely on both sides of the stationary contact. This process of positioning the magnetic conductor requires drilling holes in the magnetic conductor, which is complex and inefficient. Another example is that the terminal block of the stationary contact can be configured as a U-shaped bent structure. The terminal block can include a first part, a second part, and a U-shaped bent portion connecting the first and second parts. A locking groove for engaging the magnetic conductor can be provided on the inner wall of the U-shaped bent portion, so that when the magnetic conductor is installed in the locking groove, its bifurcated portion is positioned precisely on both sides of the stationary contact. This process of positioning the magnetic conductor requires machining the bent portion of the stationary contact, which is costly.

[0065] To address the aforementioned problems, this application proposes a stationary contact assembly for a circuit breaker. The terminal block of this stationary contact assembly has a through-hole groove, and the bottom of the magnetic conductor has an insertion portion. The insertion portion is inserted into the through-hole groove via a sliding path provided by the through-hole groove, and slides within the sliding path until the bifurcation of the magnetic conductor is positioned on both sides of the stationary contact, eliminating the need for positioning the magnetic conductor using threaded holes or snap-fit ​​grooves.

[0066] The structure and principle of the stationary contact assembly according to embodiments of this application will be described below with reference to the accompanying drawings. This application does not limit the specific type of circuit breaker to which the stationary contact assembly belongs; for example, the circuit breaker in this application can be an electronic circuit breaker, an electromagnetic circuit breaker, or a smart circuit breaker.

[0067] Figure 1 A schematic diagram of a stationary contact assembly 10 provided in an embodiment of this application is shown. Figure 1 As shown, the stationary contact assembly 10 includes a terminal block 11 and a magnetic conductor 12.

[0068] refer to Figure 1The terminal block 11 includes a first part 111 and a second part 112. The first part 111 is provided with a through hole groove 114. The second part 112 is spaced apart from the first part 111. The upper surface of the second part 112 facing away from the first part 111 is provided with a stationary contact 113.

[0069] Continue to refer to Figure 1 In addition to the first portion 111 and the second portion 112, the terminal block 11 also includes a bent portion 115, a tilted portion 116, and a wiring portion 117. For example, Figure 2 A side view of a junction box 11 provided in an embodiment of this application is shown.

[0070] Among them, such as Figure 2 As shown, the second part 112 is connected to the first part 111 via a bent portion 115. The inclined portion 116 is inclined relative to the first part 111, and its two ends are connected to the wiring portion 117 and the first part 111, respectively. The inclined portion 116 is set at a certain angle to the first part 111; for example, it can be an obtuse angle (e.g., 100-140°) or a right angle. The inclined portion 116 and the wiring portion 117 can be parallel, meaning the wiring portion 117 can be located on the plane of the inclined portion 116. Alternatively, the inclined portion 116 and the wiring portion 117 can form any one of an acute angle (e.g., 60°-90°), a right angle, or an obtuse angle (e.g., 100°-140°).

[0071] In some embodiments, when the inclined portion 116 and the wiring portion 117 are set at an obtuse angle (e.g., 100°-140°) and the inclined portion 116 and the first portion 111 are also set at an obtuse angle (e.g., 100°-140°), the wiring portion 117 and the first portion 111 are set in parallel.

[0072] The wiring portion 117 and the second portion 112 are located on the same side of the first portion 111, such as both being located above the first portion 111. The wiring portion 117 can realize the fixed connection of the stationary contact assembly 10 in the circuit breaker, and the wiring portion 117 can also be provided with one or more wiring holes 1171 to realize the wiring between the stationary contact assembly 10 and the power supply side (such as the incoming line side).

[0073] like Figure 2 As shown, in the length direction of the first part 111 (e.g.) Figure 2 On X), the length of the first portion 111 is longer than the length of the second portion 112. A portion of the through-hole groove 114 is located in the portion of the first portion 111 opposite to the second portion 112. For example, refer to... Figure 1The portion of the through-hole groove 114 that mates with the insertion portion 123 is located below the second portion 112, that is, in the portion of the first portion 111 opposite to the second portion 112. The other portion of the through-hole groove 114 is located in the portion of the first portion 111 that is longer than the second portion 112. For example, refer to... Figure 1 The through-hole groove 114 is along the length direction of the first part 111 (e.g., Figure 1 The X shown continues to extend to the inclined portion 116, which is another part of the aforementioned through-hole groove 114.

[0074] like Figure 2 As shown, the interval between the first portion 111 and the second portion 112 can be set to a first interval h. In some embodiments, the first portion 111 and the second portion 112 can be as follows: Figure 2 The parallel arrangement shown can also be an angled arrangement. In other words, the value of the first interval h is not fixed and can vary depending on the tilt angle of the second part 112 relative to the first part 111. In some embodiments, the terminal block 11 can be a one-piece molded structure.

[0075] Continue to refer to Figure 1 The magnetic conductor 12 includes a forked portion 121, a connecting portion 122, and an insertion portion 123 connected in sequence. For example, Figure 1 As shown, along the width direction of the second part 112 ( Figure 1 In the Y direction shown, the bifurcation portion 121 includes two spaced-apart first bifurcation portions 1211 and second bifurcation portions 1212. The stationary contact 113 is located within the first bifurcation portion 1211 and the second bifurcation portion 1212 of the magnetic conductor 12. The connecting portion 122 of the magnetic conductor 12 is located within the first interval between the first portion 111 and the second portion 112. The insertion portion 123 extends into the through-hole groove 114 perpendicular to the plane of the first portion 111.

[0076] Figure 3 A schematic diagram of a magnetic conductor 12 provided in an embodiment of this application is shown. Figure 3 As shown, the first fork portion 1211 includes a first outer surface 12111, and in the length direction of the first portion 111 ( Figure 3 The first end face 12112, the first top face 12113, and the first inner face (not shown in the X direction) located on both sides of the first fork 1211 are shown in the X direction. Figure 3 (as shown in the image), the second fork 1212 includes a second inner side 12121, and in the length direction of the first portion 111 (…). Figure 3 The second end face 12122, the second top face 12123, and the second outer face (not shown in the X direction) located on both sides of the second fork 1212 are shown in the X direction. Figure 3As shown in the diagram, referring to the first outer surface 12111), the insertion portion 123 is included in the length direction of the first portion 111 (…). Figure 3 The insertion end face 1231 near the bent portion 115 in the X direction (as shown).

[0077] In some embodiments, such as Figure 1 As shown, in the length direction of the first part 111 ( Figure 1 In the X direction (as shown), the through-hole groove 114 extends beyond the plane where the first portion 111 is located. In other words, the through-hole groove 114 is not only provided on the first portion 111, but also extends to other portions of the terminal block 11. For example, as... Figure 1 As shown, the through-hole groove 114 can extend from the first part 111 to the inclined part 116 or even the wiring part 117. Thus, during the installation of the magnetic conductor 12, the insertion part 123 can be first inserted into the through-hole groove 114 provided in the inclined part 116 or the wiring part 117, and then the magnetic conductor 12 can be slid, so that the first fork 1211 and the second fork 1212 are positioned in the width direction of the stationary contact 113 in the second part 112. Figure 1 On both sides (as shown in the Y direction). With the structure of the through-hole groove 114, the installation process of the magnetic conductor 12 is simpler. It can be inserted into the through-hole groove 114 of the inclined part 116 and then the magnetic conductor 12 can be slid.

[0078] In some embodiments, such as Figure 1 As shown, the through-hole groove 114 also includes a section along the length of the first portion 111 ( Figure 1 The through-hole groove end face 1141 near the bent portion 115 in the X direction (as shown). Furthermore, in the length direction of the first portion 111 (… Figure 1 In the X direction shown, the insertion end face 1231 of the insertion part 123 is in contact with the through-hole groove end face 1141 of the through-hole groove 114, so that the stationary contact 113 is located within the bifurcation 121 of the magnetic conductor 12. In other words, the through-hole groove end face 1141 can play a limiting role. When the insertion part 123 is slid to be in contact with the through-hole groove end face 1141, the first fork 1211 and the second fork 1212 are just positioned in the width direction of the second part 112 of the stationary contact 113. Figure 1 On both sides (as shown in the Y direction). In this way, the sliding process of the magnetic conductor 12 is simpler and the position of the bifurcation 121 is more accurate. It only needs to slide to the end face 1141 of the through hole groove 114.

[0079] In some embodiments, the insertion portion 123 is press-fitted with the through-hole groove 114 to achieve a tight connection and fixation. For example, in the width direction of the first portion 111, the width of the insertion portion 123 is greater than the width of the through-hole groove 114, and the insertion portion 123 is pressed into the through-hole groove 114.

[0080] In the stationary contact assembly 10 provided in this application, the through-hole groove 114 provides a sliding path. After the insertion part 123 is inserted into the through-hole groove 114, it can slide within the through-hole groove 114, thereby sliding the magnetic conductor 12 so that the first fork part 1211 and the second fork part 1212 are positioned in the width direction of the second part 112 of the stationary contact 113. Figure 1 The magnetic conductor 12 can be positioned on both sides (as shown in the Y direction) without the need for threaded holes or snap-fit ​​grooves. This process of setting the position of the magnetic conductor 12 is simple, convenient, and low-cost.

[0081] Figure 4 A schematic diagram of another stationary contact assembly 10 provided in an embodiment of this application is shown. Figure 4 As shown, with Figure 1 Compared to the stationary contact assembly 10 shown, it also includes an insulating element 13.

[0082] Among them, such as Figure 4 As shown, the insulating member 13 is sleeved on the bifurcation portion 121, thereby providing insulation to prevent damage to the magnetic conductor 12 caused by the electric arc generated when the moving contact and the stationary contact 113 disconnect. In some other embodiments of this application, the insulating member 13 may also cover the portion of the upper surface of the second portion 112 where the stationary contact 113 is not located. This structure not only protects the second portion 112 from electric arc damage but also allows the magnetic conductor 12 to be fixed to the terminal block 11. In other words, in the embodiments of this application, the insulating member 13 may serve only an insulating function, or it may serve both an insulating and a fixing function for the magnetic conductor 12.

[0083] For example, Figure 5A and Figure 5B A schematic diagram of an insulating member 13 provided in an embodiment of this application is shown. Wherein, Figure 5A and Figure 5B Different perspectives of the insulating element 13 are shown.

[0084] like Figure 5A As shown, the insulating member 13 includes two spaced-apart first mounting portions 131. Each first mounting portion 131 includes a first side panel 1311, a second side panel 1312, a top panel 1313, and an inner panel 1314, which are connected to form a first mounting groove 1315 of the first mounting portion 131. (See reference) Figure 4 Each first mounting part 131 is sleeved on the corresponding first fork part 1211 and second fork part 1212, such that the stationary contact 113 is located between the two first mounting parts 131.

[0085] In some embodiments, the two first mounting portions 131 may cover the corresponding first fork portion 1211 and second fork portion 1212, such as Figure 3 All surfaces shown are designed to protect the first fork 1211 and the second fork 1212 from arc damage. In some embodiments of this application, due to the arc affecting the first outer surface 12111 of the first fork 1211 and the second outer surface of the second fork 1212 (not on...) Figure 3 The impact (shown in the diagram) is relatively small, therefore, in order to reduce the processing cost of the insulating component 13, such as Figure 4 As shown, each first mounting portion 131 can cover the surface of the corresponding fork portion except for its side surface. Specifically, the first side panel 1311 and the second side panel 1312 of the first mounting portion 131 respectively cover the first end face 12112 of the first fork portion 1211 and the second end face 12122 of the second fork portion 1212. The top panel 1313 of the first mounting portion 131 respectively covers the first top surface 12113 of the first fork portion 1211 and the second top surface 12123 of the second fork portion 1212. The inner panel 1314 of the first mounting portion 131 respectively covers the first inner side surface of the first fork portion 1211 (not shown on the side surface). Figure 4 (as shown in the middle) and the second inner side 12121 of the second fork 1212.

[0086] In some embodiments, the two first mounting portions 131 can be fixedly connected to the corresponding first fork portion 1211 and second fork portion 1212 by a snap-fit ​​method. For example, referring to... Figure 3 The magnetic conductor 12 also includes a snap-fit ​​groove 1233 disposed on the first fork portion 1211 and the second fork portion 1212, and such Figure 5A and Figure 5B As shown, the first mounting groove 1315 of the first mounting portion 131 includes a snap-fit ​​protrusion 1316. Furthermore, when each first mounting portion 131 is fitted onto the corresponding first fork portion 1211 and second fork portion 1212, the snap-fit ​​protrusion 1316 of each first mounting portion 131 engages with the snap-fit ​​groove 1233 of the corresponding first fork portion 1211 and second fork portion 1212, such that... Figure 4 Each of the first mounting portions 131 shown is fixedly connected to the corresponding first fork portion 1211 and second fork portion 1212.

[0087] like Figure 5A As shown, the insulating component 13 also includes a second mounting portion 132, which not only insulates the second part 112 but also fixes the magnetic conductor 12 to the terminal block 11. Figure 5B As shown, similar to the principle of the first mounting part 131 forming a mounting groove by means of multiple panels, the second mounting part 132 includes a second mounting groove 1321.

[0088] Continue to refer to Figure 4The second mounting portion 132 is disposed opposite to the stationary contact 113 along the length direction of the second portion 112. Furthermore, the second mounting groove 1321 mates with the portion of the second portion 112 where the stationary contact 113 is not located, thereby allowing the portion of the second portion 112 where the stationary contact 113 is not located to be disposed within the second mounting groove 1321. Thus, because the second mounting groove 1321 mates with the second portion 112, the first mounting portion 131 and the magnetic conductor 12 are difficult to move along the length direction of the second portion 112 (…). Figure 1 The magnet 12 is moved in the X direction (as shown) and thus fixed in place.

[0089] In some embodiments, the first mounting portion 131 and the second mounting portion 132 are integrally formed. In this way, the insulating member 13 fixes the magnetic conductor 12 through the integrally formed structure, and the fixing effect is more secure.

[0090] The following describes an embodiment of the magnetic conductor 12 with reference to the accompanying drawings. The material of the magnetic conductor 12 can be Q195, Q235, or other materials. Figure 6 , Figure 7A , Figure 7B , Figure 8 , Figure 9A and Figure 9B Schematic diagrams of the magnetic conductor 12 provided in embodiments of this application are shown. In some embodiments, the magnetic conductor 12 may be formed by splicing multiple magnetically conductive sheets of the same shape along the same direction. In other embodiments, the bifurcation portion 121 of the magnetic conductor 12 may be composed of magnetically conductive sheets. By utilizing the characteristic that the magnetic permeability of the magnetic conductor 12 is much greater than that of air, the electric arc can be controlled and guided, thereby improving arc extinguishing efficiency and protecting the stationary contact assembly 10.

[0091] For example, such as Figure 6 As shown, the magnetic conductor 12 includes a plurality of first magnetic sheets 124 of the same shape, and the plurality of first magnetic sheets 124 are oriented along the length of the first portion 111 (e.g., ...). Figure 6 The first magnetic sheet 124 is spliced ​​and fixed on the X shown. Each first magnetic sheet 124 includes a through hole 1241.

[0092] In some embodiments, the plurality of first magnetic sheets 124 may be fixed by adhesive bonding. For example, an adhesive can be used to form a chemical or physical bond on the surfaces of the plurality of first magnetic sheets 124, thereby permanently connecting the plurality of first magnetic sheets 124. The adhesive bonding method can achieve splicing and fixing through molecular-level forces, which can prevent deformation of the first magnetic sheets 124.

[0093] In some embodiments, a plurality of first magnetic sheets 124 are secured by mechanical fasteners and through holes 1241. For example, as Figure 7AAs shown, the magnetic conductor 12 also includes a first rivet 125, which passes through the through holes 1241 of the plurality of first magnetic sheets 124 to fix the plurality of first magnetic sheets 124. For example, as... Figure 7B As shown, the magnetic conductor 12 also includes a fixing pin 126, which passes through the through holes 1241 of the plurality of first magnetic sheets 124 to fix the plurality of first magnetic sheets 124. In some other embodiments, each first magnetic sheet may have a plurality of through holes 1241, and this application does not limit the number of through holes 1241.

[0094] For example, such as Figure 8 As shown, the forked portion 121 includes a second magnetic sheet 1213, which is disposed on the connecting portion 122 and located in the width direction of the first portion 111 (e.g., Figure 8 The two sides of the Y shown.

[0095] In some embodiments, the second magnetic sheet 1213 can be bonded and fixed to the connecting portion 122 in the width direction of the first portion 111 (e.g., Figure 8 The two ends of the Y shown. The bonding method can be referred to the previous text, and will not be repeated here.

[0096] In some embodiments, the second magnetic sheet 1213 is fixed to both ends of the connecting portion 122 by a snap-fit ​​connection. For example, as Figure 9A As shown, the second magnetic sheet 1213 is provided with a first snap-fit ​​structure 12131, and the connecting part 122 is provided with a second snap-fit ​​structure 1221 at both ends of the width direction of the first part 111. The first snap-fit ​​structure 12131 and the second snap-fit ​​structure 1221 cooperate to fix the second magnetic sheet 1213 at both ends of the connecting part 122. Figure 9A The snap-fit ​​structure shown is only an example, and other forms of snap-fit ​​structures can also be used in this application.

[0097] In some embodiments, the second magnetic sheet 1213 is fixed to both ends of the connecting portion 122 by the engagement of protrusions and holes. For example, as Figure 9B As shown, positioning protrusions 1222 are provided at both ends of the connecting part 122, and a first positioning hole 12132 is provided on the second magnetic sheet 1213. The first positioning hole 12132 cooperates with the positioning protrusions 1222 to fix the second magnetic sheet 1213 at both ends of the connecting part 122.

[0098] The preceding text described part of the structure of the stationary contact assembly, which mainly includes a terminal block 11, a magnetic conductor 12, and an insulator 13. The insulator 13 serves to both insulate and fix the magnetic conductor 12. Considering that if the insulator 13 only serves an insulating function, it is also necessary to fix the magnetic conductor 12 to prevent its position from shifting during circuit breaker operation, thus reducing arc-extinguishing efficiency, the following text will describe some embodiments of the structure for fixing the magnetic conductor 12.

[0099] For example, Figure 10A and Figure 10B This illustration shows a schematic diagram of a method for fixing a magnetic conductor 12 using a fixing member 14, according to an embodiment of this application. When the length of the insertion portion 123 is greater than the thickness of the through-hole groove 114, the insertion portion 123 includes a fixing portion 1232 extending out of the through-hole groove 114. The stationary contact assembly 10 also includes the fixing member 14, which cooperates with the fixing portion 1232 to fix the magnetic conductor 12.

[0100] In some embodiments, the fastener 14 may be a mechanical fastener. For example... Figure 10A As shown, the fastener 14 includes a fixing plate 141, which is disposed on the side of the first part 111 opposite to the second part 112, for example... Figure 10A The bottom end of the first part 111 is shown. A groove 1411 is provided on the fixing plate 141, so that the fixing part 1232 can be placed in the groove 1411. The groove 1411 can restrict the fixing part 1232 in the length direction of the first part 111 (e.g., ...). Figure 10A The movement on X) shown. The fixing member 14 also includes a second rivet 142, one end of which is fixedly connected to the fixing plate 141 and the other end is fixedly connected to the first part 111, thereby realizing the fastening connection between the fixing plate 141 and the first part 111, so that the fixing part 1232 is fixed in the groove 1411, and finally fixing the magnetic conductor 12.

[0101] In some embodiments, the fastener 14 may include a base structure in the circuit breaker. For example... Figure 10B As shown, the fixing member 14 includes a bottom base 143, and a second positioning hole 1431 is provided on the bottom base 143. The fixing part 1232 is placed in the second positioning hole 1431, so that the fixing part 1232 is fixed by the bottom base 143, and finally the magnetic conductor 12 is fixed.

[0102] For example, Figure 10C This illustration shows a schematic diagram of a method for fixing a magnetic conductor 12 by riveting, according to an embodiment of this application. For example, as... Figure 10C As shown, after the insertion part 123 is inserted into the through hole groove 114, it moves along the vertical upward direction (e.g.) Figure 10CAs shown in Z), pressure is applied to the fixing part 1232, causing the fixing part 1232 to plastically deform as shown in the figure. Figure 10C The shape shown allows the fixing part 1232 to form an interlocking riveting connection with the first part 111. In some embodiments, before applying pressure to the fixing part 1232, the length of the fixing part 1232 extending out of the through hole groove 114 can be reduced to prevent the insertion part 123 from breaking when pressure is applied to the fixing part 1232 due to excessive length, thereby improving the stability of the riveting process.

[0103] Figure 11 This illustration shows a schematic diagram of a limiting component 15 provided in an embodiment of this application, wherein the limiting component 15 is used to limit the magnetic conductor 12 in the length direction of the first portion 111 (e.g., Figure 11 The movement on X) as shown. Figure 11 As shown, the limiting component 15 is disposed on the first part 111 and is located in the length direction of the connecting part 122 in the first part 111 (e.g., Figure 11 On both sides of X) as shown, in the length direction of the first part 111 (as shown) Figure 11 A magnetic conductor 12 is fixed on X) as shown.

[0104] In some embodiments, the limiting component 15 may be a limiting block. For example, the first portion 111 includes a positioning hole, and the limiting block may include a positioning protrusion that mates with the positioning hole, thereby allowing the limiting block to be installed on the connecting portion 122 in the length direction of the first portion 111 (e.g., ...). Figure 11 The two sides of the X shown are used to restrict the movement of the magnetic conductor 12.

[0105] In some embodiments, the limiting component 15 may be a screw mounted on the upper surface of the first portion 111 facing the second portion 112. For example, when the magnetic conductor 12 is slid to the position where the forked portion 121 is located on both sides of the stationary contact 113, the limiting component 15 may be a screw mounted on the upper surface of the first portion 111 along its length direction (e.g., ...). Figure 11 Screws are installed at both ends of the X shown, so that the length direction of the first part 111 (as shown) is such that Figure 11 The movement of the magnetic conductor 12 is restricted on X) as shown.

[0106] It should be noted that in the examples and description of this patent, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one" does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0107] Although this application has been illustrated and described with reference to certain preferred embodiments thereof, those skilled in the art should understand that various changes in form and detail may be made thereto without departing from the spirit and scope of this application.

Claims

1. A stationary contact assembly for a circuit breaker, characterized in that, include: The junction box includes: The first part of the terminal block is provided with a through-hole groove; The second part is provided with a first gap between the second part and the first part of the terminal block, and a stationary contact is provided on the upper surface of the second part facing away from the first part. A magnetic conductor includes a forked portion, a connecting portion, and an insertion portion connected in sequence. The forked portion includes two forks spaced apart along the width direction of the second portion. The magnetic conductor is positioned relative to the terminal block as follows: The two spaced-apart forks are located on both sides of the stationary contact, the connecting part of the magnetic conductor is located within the first interval, and the insertion part extends into the through-hole groove in a manner perpendicular to the plane of the first part.

2. The stationary contact assembly according to claim 1, characterized in that, In the length direction of the first part, the length of the first part is longer than the length of the second part, a portion of the through-hole groove is located in the portion of the first part opposite to the second part, and another portion of the through-hole groove is located in the portion of the first part that is longer than the second part.

3. The stationary contact assembly according to claim 1, characterized in that, The terminal block further includes an inclined portion and a wiring portion. The two ends of the inclined portion are respectively connected to the wiring portion and the first portion. The through-hole groove extends from the first portion to the inclined portion. The wiring portion is provided with a wiring hole and is located on the same side of the first portion as the second portion.

4. The stationary contact assembly according to any one of claims 1 to 3, characterized in that, The insertion part is interference-fitted with the through-hole groove.

5. The stationary contact assembly according to any one of claims 1 to 3, characterized in that, The insertion part fits into one end of the through-hole groove, so that the stationary contact is located within the bifurcation of the magnetic conductor.

6. The stationary contact assembly according to any one of claims 1 to 3, characterized in that, Also includes: An insulating component is sleeved on the bifurcation portion and covers the portion of the upper surface of the second part where the stationary contact is not provided, so as to fix the magnetic conductor to the terminal block.

7. The stationary contact assembly according to claim 6, characterized in that, The insulating component includes: Two spaced-apart first mounting slots are provided, each of which is fitted onto a corresponding fork, and the stationary contact is located between the two first mounting slots.

8. The stationary contact assembly according to claim 7, characterized in that, Each of the forks includes an outer side facing away from the other fork in the width direction of the first portion, and each of the first mounting slots covers the surface of the fork other than the outer side.

9. The stationary contact assembly according to claim 7, characterized in that, Each of the first mounting slots includes a snap-fit ​​protrusion, and each of the forks includes a snap-fit ​​groove. The snap-fit ​​protrusion engages with the snap-fit ​​groove to securely connect the insulating member to the fork.

10. The stationary contact assembly according to claim 7, characterized in that, The insulating component also includes: The second mounting groove is arranged opposite to the stationary contact along the length of the second part, and the portion of the second part without the stationary contact is arranged in the second mounting groove.

11. The stationary contact assembly according to any one of claims 1 to 3, characterized in that, The magnetic conductor includes a plurality of first magnetic sheets of the same shape, which are spliced ​​and fixed together along the length of the first part.

12. The stationary contact assembly according to claim 11, characterized in that, The first magnetic conductive sheet has a through hole, and the magnetic conductor includes a first rivet, which passes through the through hole of the plurality of first magnetic conductive sheets to fix the plurality of first magnetic conductive sheets.

13. The stationary contact assembly according to claim 11, characterized in that, The magnetic conductor includes a fixing bolt, and each of the first magnetic sheets has a through hole. The fixing bolt passes through the through hole of the plurality of first magnetic sheets to fix the plurality of first magnetic sheets.

14. The stationary contact assembly according to claim 11, characterized in that, The plurality of first magnetic sheets are bonded and fixed together.

15. The stationary contact assembly according to any one of claims 1 to 3, characterized in that, The bifurcation portion includes a second magnetic sheet, which is disposed on the connecting portion and located on both sides of the connecting portion in the width direction of the first portion.

16. The stationary contact assembly according to claim 15, characterized in that, The second magnetic sheet is provided with a first snap-fit ​​structure, and the connecting part is provided with a second snap-fit ​​structure at both ends of the first part in the width direction. The first snap-fit ​​structure and the second snap-fit ​​structure cooperate to fix the second magnetic sheet at both ends of the connecting part in the width direction of the first part.

17. The stationary contact assembly according to claim 15, characterized in that, The second magnetic conductive sheet is bonded and fixed to both ends of the connecting part in the width direction of the first part.

18. The stationary contact assembly according to claim 15, characterized in that, The connecting portion has positioning protrusions at both ends of the first portion in the width direction, and the second magnetic sheet has a first positioning hole. The first positioning hole cooperates with the positioning protrusion to fix the second magnetic sheet at both ends of the connecting portion in the width direction of the first portion.

19. The stationary contact assembly according to any one of claims 1 to 3, characterized in that, The insertion part includes a fixing part that extends out of the through-hole groove, and the fixing part is fixedly connected to the first part by riveting.

20. The stationary contact assembly according to any one of claims 1 to 3, characterized in that, The insertion part includes a fixing part that extends out of the through-hole groove, and the stationary contact assembly also includes a fixing member that cooperates with the fixing part to fix the magnetic conductor.

21. The stationary contact assembly according to claim 20, characterized in that, The fastener includes: A fixing plate is disposed on the side of the first part away from the second part, and the fixing plate is provided with a groove, and the fixing part is placed in the groove; The second rivet has one end fixedly connected to the fixing plate and the other end fixedly connected to the first part.

22. The stationary contact assembly according to claim 20, characterized in that, The fastener includes: The bottom base has a second positioning hole, wherein the fixing part is placed in the second positioning hole to fix the magnetic conductor.

23. The stationary contact assembly according to any one of claims 1 to 3, characterized in that, Also includes: A limiting component is disposed on the first part and located on both sides of the connecting portion along the length direction of the first part, so as to fix the magnetic conductor along the length direction of the first part.

24. A circuit breaker, characterized in that, include: Moving contact assembly, including moving contact; The stationary contact assembly as described in any one of claims 1 to 23, wherein the stationary contact of the stationary contact assembly is disposed opposite to the moving contact.

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