Base of molded case circuit breaker

Abstract

The invention relates to the technical field of electrical connection devices, in particular to a base of a molded case circuit breaker. The base comprises a bottom, a first side wall, a second side wall and alternate isolation ribs. The base comprises a body part and a splicing part. The base comprises a wiring end, the splicing part comprises a first side wall, a second side wall and a part, at the wiring end, of at least one of the interphase isolation ribs, and the splicing part and the body part are spliced and fixed. According to the molded case circuit breaker provided by the invention, the base and the wiring end adopt the splicing structure, so that when the first side wall, the second side wall and the interphase isolation ribs are independent from the body part at the wiring end, the splicing part is not limited by the complex structure of the body part, and the flexibility of independent manufacturing is increased. By changing the shapes and materials of the first side wall, the second side wall and the n alternate isolation ribs at the wiring end, the wall thickness of the parts can be reduced. And under the condition that the appearance size of the molded case circuit breaker is not changed, the width of the wiring groove is increased, so that the wiring capability of customers is improved.

Description

Technical Field

[0001] This application relates to the technical field of electrical connection devices, and particularly to a base of a molded case circuit breaker. Background Art

[0002] A molded case circuit breaker is a common circuit protection device, widely used in industrial, commercial, and residential electrical systems to control and protect circuits from electrical faults such as overload, short circuit, and undervoltage.

[0003] With the continuous increase in power consumption capacity, the requirement for the load-bearing capacity of molded case products is getting higher and higher. While the load-bearing capacity meets the requirements, the wiring ability of the client side has become a problem.

[0004] The wiring ability of a molded case circuit breaker depends on the opening size of the wiring slots on the terminal of the molded case circuit breaker base. The larger the opening size, the stronger the wiring ability.

[0005] However, due to the requirement of the small volume of the molded case circuit breaker, the size of the wiring slots on the existing molded case circuit breaker base is small, which easily leads to insufficient wiring ability on the client side. Summary of the Invention

[0006] This application provides a base of a molded case circuit breaker, which can increase the size of the wiring slots on the base of the molded case circuit breaker and improve the wiring ability of the client side.

[0007] The technical solution of this application is as follows:

[0008] The base of the molded case circuit breaker provided by this application includes a bottom, a first side wall, a second side wall, and n phase-interval isolation ribs, where n is equal to 1, 2, or 3.

[0009] Along the first direction, the first side wall, the second side wall, and the n phase-interval isolation ribs are arranged at intervals, and the n phase-interval isolation ribs are sequentially arranged between the first side wall and the second side wall. Along the second direction, the bottom is located at one end of the first side wall, the second side wall, and the n phase-interval isolation ribs.

[0010] The base includes a main body part and a splicing part.

[0011] Along the third direction, the base includes a terminal. The splicing part includes at least a part of the first side wall, the second side wall, and the n phase-interval isolation ribs at the terminal. The splicing part is spliced with the main body part and fixed.

[0012] The first direction, the second direction, and the third direction are perpendicular to each other.

[0013] Based on the base of the molded case circuit breaker provided by this application, the wiring terminal adopts a splicing structure, and the splicing part includes at least one of the first side wall, the second side wall, and a part of n phase isolation ribs at the wiring terminal. In this way, when the first side wall, the second side wall, and the part of the n phase isolation ribs at the wiring terminal are independent of the body part, the splicing part is not restricted by the complex structure of the body part, and the flexibility of independent manufacturing is increased. By changing the shapes and materials of the first side wall, the second side wall, and the part of the n phase isolation ribs at the wiring terminal, the wall thickness of these parts can be thinned. Without changing the external dimensions of the molded case circuit breaker, the width of the wiring slot is increased, thereby improving the wiring ability of customers.

[0014] In a possible design, the material of the splicing part is thermoplastic, and the splicing part includes the part of n phase isolation ribs at the wiring terminal.

[0015] Along the second direction, the part of the phase isolation rib at the wiring terminal includes an upper part and a lower part. The upper part is the part of the phase isolation rib close to the middle cover of the circuit breaker, and the lower part is the part of the phase isolation rib close to the bottom.

[0016] The upper part is provided with a first mounting hole for installing a self-tapping screw, and the self-tapping screw is used to connect the base and the middle cover of the circuit breaker.

[0017] Based on the base of the molded case circuit breaker provided by this embodiment, when the splicing part adopts a thermoplastic material, the middle cover and the base are connected by self-tapping screws. In this way, no additional metal threaded inserts need to be provided in the phase isolation ribs. Therefore, the thickness of the phase isolation ribs can be thinned. Without changing the external dimensions of the molded case circuit breaker, the width of the wiring slot is increased, improving the wiring ability of customers.

[0018] In a possible design, the thickness of the lower part is equal to the thickness of the upper part, or the thickness of the lower part is less than the thickness of the upper part.

[0019] In a possible design, the splicing part includes the part of n phase isolation ribs at the wiring terminal.

[0020] Along the second direction, the part of the phase isolation rib at the wiring terminal includes an upper part and a lower part. The upper part is the part of the phase isolation rib close to the middle cover of the circuit breaker, and the lower part is the part of the phase isolation rib close to the bottom. The thickness of the lower part is less than the thickness of the upper part.

[0021] The upper part is provided with a first mounting hole in which a threaded insert is embedded. The threaded insert is used to install a screw, and the screw is used to connect the base and the middle cover of the circuit breaker.

[0022] Based on the base of the molded case circuit breaker provided by this embodiment, the thickness of the lower part is less than the thickness of the upper part. Threaded inserts can still be embedded in the upper part of the phase isolation rib to improve the connection reliability between the base and the middle cover. The lower part of the phase isolation rib has a thinner thickness to increase the width of the wiring slot and improve the wiring ability of users.

[0023] In a possible design, the material of the splicing part is bakelite or thermoplastic.

[0024] Based on the base of the molded case circuit breaker provided by this embodiment, if a threaded insert is still provided on the upper part of the phase isolation rib, then the toughness of the phase isolation rib does not need to be considered. Based on this, whether the material of the splicing part is bakelite or thermoplastic can meet the use requirements. Thus, the base of the molded case circuit breaker provided by this embodiment has the characteristic of a wide selection of splicing part materials.

[0025] In a possible design, along the first direction, the part of the phase isolation rib at the wiring end includes opposite first and second surfaces. Along the third direction, both the first and second surfaces include convex parts and concave parts, and the convex parts are arranged at the positions of the phase isolation rib where the mounting holes are provided, and the convex parts are used to strengthen the wall thickness of the mounting holes. The mounting holes include the first mounting hole.

[0026] Based on the base of the molded case circuit breaker provided by this embodiment, both the first and second surfaces include convex parts and concave parts. In this way, the parts where the convex parts are provided play a role in strengthening the phase isolation rib. The parts where the concave parts are provided can be used as heat dissipation channels, which helps to reduce the temperature rise at the wiring end.

[0027] In a possible design, along the second direction, a plugging protrusion is provided at one end of the splicing part away from the bottom.

[0028] Based on the base of the molded case circuit breaker provided by this embodiment, a plugging protrusion is provided at one end of the splicing part away from the bottom. Then, a corresponding plugging groove will be provided at one end of the middle cover close to the splicing part. In this way, when the base is connected to the middle cover, the plugging protrusion of the base is inserted into the plugging groove to achieve the plugging fit between the two. After the middle cover and the base achieve the plugging fit through the plugging protrusion and the plugging groove, the creepage distance between the phases of the molded case circuit breaker will increase accordingly. In this way, it helps with phase insulation.

[0029] In a possible design, the splicing part includes a first side wall, a second side wall, and the parts of n phase isolation ribs at the wiring end. The splicing part also includes a plurality of baffles.

[0030] Along the first direction, in the splicing part, the first side wall is connected to the adjacent phase isolation rib, the second side wall is connected to the adjacent phase isolation rib, and the adjacent phase isolation ribs are connected by baffles. And along the third direction, the baffles are arranged at one end of the first side wall, the second side wall, and the phase isolation rib close to the body part.

[0031] Based on the base of the molded case circuit breaker provided by this embodiment, the splicing part not only includes the first side wall, the second side wall and the parts of the n phase separation ribs at the wiring end, but also includes a plurality of baffles. By arranging the plurality of baffles, the parts of the first side wall, the second side wall and the n phase separation ribs at the wiring end can be connected into an integral structure. Thus, it is convenient for the production and installation of the splicing part. In addition, the plurality of baffles can play a role in blocking the arc and avoid the ablation of the wiring end by the arc.

[0032] In a possible design, the splicing part further includes a plurality of reinforcing ribs. Along the second direction, the plurality of reinforcing ribs are arranged at one end of the first side wall, the second side wall and the phase separation ribs away from the bottom.

[0033] One of the reinforcing ribs connects the first side wall and the adjacent phase separation rib, and also connects the baffle between the first side wall and the adjacent phase separation rib.

[0034] Another reinforcing rib connects the second side wall and the adjacent phase separation rib, and also connects the baffle between the second side wall and the adjacent phase separation rib.

[0035] The remaining reinforcing ribs are used to connect the adjacent phase separation ribs and the baffles between the phase separation ribs, and one reinforcing rib is connected between every two adjacent phase separation ribs.

[0036] Based on the base of the molded case circuit breaker provided by this embodiment, the setting of the first reinforcing rib, the second reinforcing rib and the third reinforcing rib can improve the overall strength of the splicing part. During the breaking test of the molded case circuit breaker, when the moving contact and the static contact are separated, a huge energy impact will be generated. The enhancement of the overall strength of the splicing part is beneficial to reducing the damage of the splicing part.

[0037] In a possible design, along the third direction, the phase separation ribs include an incoming line end separation rib, a first area separation rib, a second area separation rib and an outgoing line end separation rib.

[0038] Among them, the incoming line end separation rib is arranged at the incoming line end, the outgoing line end separation rib is arranged at the outgoing line end, the first area separation rib is located in the area mainly affected by closing and opening, and the second area separation rib is located between the first area separation rib and the outgoing line end separation rib.

[0039] The splicing part is an outgoing line end splicing part, and the splicing part further includes a second area separation rib.

[0040] Based on the base of the molded case circuit breaker provided by this embodiment, the outgoing line end splicing part includes the second area separation rib. Thus, there is no need to separately set and install the second area separation rib. When the outgoing line end splicing part is assembled with the main body part, the second area separation rib is set, which helps to improve the installation efficiency. Description of the Drawings

[0041] Figure 1 The figure shows a schematic structural diagram of the housing of a molded case circuit breaker in the related art.

[0042] Figure 2 The figure shows a schematic structural diagram of the housing of the molded case circuit breaker provided in the embodiment of the present application.

[0043] Figure 3 It is Figure 2 an exploded view.

[0044] Figure 4 It is Figure 2 a schematic structural diagram of the base in

[0045] Figure 5 It is Figure 2 a schematic structural diagram of the incoming line end splicing part in

[0046] Figure 6 It is Figure 2 a schematic structural diagram of the outgoing line end splicing part in

[0047] Figure 7 It is Figure 2 a schematic structural diagram of the body part in

[0048] Figure 8 The figure shows a schematic structural diagram of the middle cover provided in the embodiment of the present application.

[0049] The reference numerals in the related art are:

[0050] 1', base; 1A', incoming line end; 1B', outgoing line end; 1C', wiring groove; 11', bottom; 12', first side wall; 13', second side wall; 14', phase isolation rib;

[0051] 2', middle cover;

[0052] D1', first direction; D2', second direction; D3', third direction;

[0053] The reference numerals in the embodiment of the present application are:

[0054] 1, base; 1A, incoming line end; 1B, outgoing line end; 1C, wiring groove; 1D, splicing part; 1D1, incoming line end splicing part; 1D2, outgoing line end splicing part; 1D3, insertion protrusion; 1D4, baffle; 1D5, reinforcing rib; 1E, body part;

[0055] 11, bottom; 12, first side wall; 13, second side wall; 14, phase isolation rib;

[0056] 141. Convex part; 142. Concave part; 143. First mounting hole; 144. Arc separator mounting hole; 145. Molded case circuit breaker fixing hole; 14A. Inlet terminal isolation rib; 14B. First area isolation rib; 14C. Second area isolation rib; 14D. Outlet terminal isolation rib;

[0057] 2. Middle cover; 21. Insertion groove;

[0058] D1. First direction; D2. Second direction; D3. Third direction. Detailed implementation manners

[0059] To make the objectives, technical solutions and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application. Apparently, the described embodiments are some but not all of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts shall fall within the scope of protection of this application.

[0060] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the description of this application herein are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the description and claims of this application and the drawings are intended to cover non-exclusive inclusion.

[0061] Referring to "embodiments" herein means that the specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase "embodiments" appearing in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0062] In addition, the terms "first", "second", etc. in the description and claims of this application or the above drawings are used to distinguish different objects and are not used to describe a specific order, and may explicitly or implicitly include one or more of such features.

[0063] In the description of this application, unless otherwise specified, "a plurality of" means two or more (including two), and similarly, "a plurality of groups" means two or more groups (including two groups).

[0064] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, the "connection" or "coupling" of mechanical structures can refer to a physical connection. For example, a physical connection can be a fixed connection, such as a fixed connection through a spacer, such as a fixed connection through screws, bolts, or other spacers. A physical connection can also be a detachable connection, such as a snap connection or a snap-fit connection. A physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0065] The present application will be described in detail below with reference to the accompanying drawings.

[0066] Figure 1 Shown is a schematic structural view of the housing of a molded case circuit breaker in the related art. Please refer to Figure 1 In the related art, the housing of the molded case circuit breaker includes a base 1' and a middle cover 2'. The base 1' is of an integral structure.

[0067] Please continue to refer to Figure 1 In the related art, the base 1' includes a bottom 11', a first side wall 12', a second side wall 13', and n phase separation ribs 14', where n is equal to 1, 2, or 3. Along the first direction D1', the first side wall 12', the second side wall 13', and the n phase separation ribs 14' are arranged at intervals, and the n phase separation ribs 14' are sequentially arranged between the first side wall 12' and the second side wall 13'. Along the second direction D2', the bottom 11' is located at one end of the first side wall 12', the second side wall 13', and the n phase separation ribs 14.

[0068] Please continue to refer to Figure 1 Along the third direction D3', the connection terminals of the base 1' are arranged at both ends of the base 1'. One end is the incoming line terminal 1A', and the other end is the outgoing line terminal 1B'. At the incoming line terminal 1A' and the outgoing line terminal 1B', the distance between the first side wall 12' and the adjacent phase separation rib 14', the distance between adjacent phase separation ribs 14', and the distance between the second side wall 13' and the adjacent phase separation rib 14' determine the width of the wiring slot 1C', which is an important factor affecting the wiring ability. The first direction D1', the second direction D2', and the third direction D3' are perpendicular to each other.

[0069] Currently, in the related art, at the incoming line terminal 1A' and the outgoing line terminal 1B', the distance between the first side wall 12' and the adjacent phase separation rib 14', the distance between adjacent phase separation ribs 14', and the distance between the second side wall 13' and the adjacent phase separation rib 14' are relatively small, which easily leads to insufficient wiring ability for customers.

[0070] In view of this, please refer to Figure 2 , Figure 2 which is a schematic structural view of the plastic case circuit breaker housing provided by the embodiment of the present application, Figure 3 and Figure 2 is an exploded view of Figure 4 and Figure 2 is a schematic structural view of the base in Figure 5 and Figure 2 is a schematic structural view of an incoming line splicing part in Figure 6 and Figure 2 is a schematic structural view of an outgoing line splicing part in Figure 7 and Figure 2 is a schematic structural view of the body part in

[0071] Please refer to Figures 2 to 7 , the base 1 of the plastic case circuit breaker provided by the present application includes a bottom 11, a first side wall 12, a second side wall 13 and n phase isolation ribs 14, where n is equal to 1, 2 or 3.

[0072] Along the first direction D1, the first side wall 12, the second side wall 13 and the n phase isolation ribs 14 are arranged at intervals, and the n phase isolation ribs 14 are sequentially arranged between the first side wall 12 and the second side wall 13. Along the second direction D2, the bottom 11 is located at one end of the first side wall 12, the second side wall 13 and the n phase isolation ribs 14.

[0073] The base 1 includes a body part 1E and a splicing part 1D.

[0074] Along the third direction D3, the base 1 includes a wiring terminal, and the splicing part 1D includes at least a part of the first side wall 12, the second side wall 13 and the n phase isolation ribs 14 at the wiring terminal. The splicing part 1D is spliced with the body part 1E and fixed.

[0075] The first direction D1, the second direction D2 and the third direction D3 are perpendicular to each other.

[0076] Please refer to Figure 2 , in the composition structure of the plastic case circuit breaker, the base 1 is an important component. The base 1 not only provides physical support for the internal components, but also participates in realizing various functions. The base 1 is composed of a bottom 11, a first side wall 12, a second side wall 13 and n phase isolation ribs 14. Along the first direction D1, n + 1 installation cavities can be formed between the first side wall 12, the second side wall 13, the n phase isolation ribs 14 and the bottom 11, and a conductive circuit is arranged in each installation cavity. Along the third direction D3, one end of the base 1 is an incoming line end 1A, and the other end of the base 1 is an outgoing line end 1B.

[0077] Different from the overall structure base 1' in the related art, the base 1 of this application mainly consists of a body part 1E and a splicing part 1D. The splicing part 1D is spliced with the body part 1E to form a complete base 1. The wiring terminal can be an incoming line terminal 1A or an outgoing line terminal 1B. Correspondingly, the splicing part 1D can be an incoming line terminal splicing part 1D1 located at the incoming line terminal 1A or an outgoing line terminal splicing part 1D2 located at the outgoing line terminal 1B.

[0078] Please refer to Figure 2 With Figure 3 , two splicing parts 1D are adopted for the base 1 of the molded case circuit breaker, and the two splicing parts 1D are correspondingly arranged at the incoming line terminal 1A and the outgoing line terminal 1B. Specifically, the incoming line terminal splicing part 1D1 includes a first side wall 12, a second side wall 13, and a part of n phase isolation ribs 14 at the incoming line terminal 1A. The outgoing line terminal splicing part 1D2 includes a first side wall 12, a second side wall 13, and a part of n phase isolation ribs 14 at the outgoing line terminal 1B. Then, the body part 1E includes the remaining parts of the first side wall 12, the second side wall 13, and n phase isolation ribs 14, and also includes a bottom 11.

[0079] It should be noted that Figure 2 This is only one embodiment of this application. In other implementation manners of this application, the base 1 of the molded case circuit breaker can adopt only one splicing part 1D. For example, the splicing part 1D is only arranged at the incoming line terminal 1A, or the splicing part 1D is only arranged at the outgoing line terminal 1B.

[0080] Please continue to refer to Figure 2 , in this application, the wiring terminal adopts a splicing structure, and the splicing part 1D includes at least one of the first side wall 12, the second side wall 13, and n phase isolation ribs 14 at the wiring terminal. In this way, when the splicing part 1D is independent of the body part 1E, the splicing part 1D is not restricted by the complex structure of the body part 1E, and the flexibility of independent production is increased. The wall thickness of these parts can be reduced by changing the shapes and materials of the first side wall 12, the second side wall 13, and n phase isolation ribs 14 at the wiring terminal. When the external dimensions of the molded case circuit breaker remain unchanged, the width of the wiring slot 1C increases, thereby improving the wiring ability of customers.

[0081] Please continue to refer to Figure 2 With Figure 5 、or Figure 2 With Figure 6 , in some implementation manners of this application, the material of the splicing part 1D is a thermoplastic, and the splicing part 1D includes a part of n phase isolation ribs 14 at the wiring terminal.

[0082] Along the second direction D2, the part of the phase isolation rib 14 at the wiring terminal includes an upper part and a lower part. The upper part is the part of the phase isolation rib 14 close to the middle cover 2 of the circuit breaker, and the lower part is the part of the phase isolation rib 14 close to the bottom 11.

[0083] A first mounting hole 143 is provided on the upper portion, and the first mounting hole 143 is used to install a self-tapping screw, and the self-tapping screw is used to connect the base 1 and the circuit breaker middle cover 2.

[0084] For more information, see Figure 1 In the related art, the base 1' is used as an integral structure, and its material is usually bakelite, which is a thermosetting plastic. Thermosetting plastics have the characteristics of good rigidity and good dimensional stability. At present, the base 1' and the middle cover 2' are often fixed with screws. If screw holes are set on the interphase isolation ribs 14' made of bakelite, then after the base 1 and the middle cover 2' are connected by screws, due to the characteristics of thermosetting plastics, the base 1' and the middle cover 2' can no longer be fastened using the original screw holes after opening.

[0085] To solve this problem, a metal threaded insert is embedded in the phase isolation rib 14'. In this way, the fastening between the base 1' and the middle cover 2' can be achieved by fastening the screws and the metal threaded insert, and the base 1' and the middle cover 2' can be fixed again by screws after opening. However, since the metal threaded insert is set in the phase isolation rib 14, the thickness of the phase isolation rib 14 is relatively thick.

[0086] Please refer to Figure 2 and Figure 3 In some embodiments provided in the present application, the material of the splicing portion 1D is thermoplastic plastic, such as nylon. Thermoplastic plastic has a certain toughness compared to thermosetting plastic. In this way, the base 1 and the circuit breaker middle cover 2 can be connected by self-tapping screws, and the middle cover 2 and the base 1 can be connected again by self-tapping screws after being opened.

[0087] When the splicing portion 1D of the present application is made of thermoplastic material, the middle cover 2 and the base 1 are connected by self-tapping screws, so that no additional metal thread insert is required in the phase isolation rib 14, and thus the thickness of the phase isolation rib 14 can be reduced. When the outer dimensions of the molded case circuit breaker remain unchanged, the width of the wiring slot 1C is increased, thereby improving the customer's wiring capacity.

[0088] Please continue to refer to Figures 2 to 7 In some embodiments of the present application, the thickness of the lower portion is equal to the thickness of the upper portion, or the thickness of the lower portion is less than the thickness of the upper portion.

[0089] Specifically, as described above, when the material of the splicing part 1D is a thermoplastic, the middle cover 2 and the base 1 are connected by self-tapping screws. In this way, the thickness of the phase separation ribs 14 can be reduced. Without changing the external dimensions of the molded case circuit breaker, the width of the wiring groove 1C is increased, improving the customer's wiring ability. In this case, if the width of the wiring groove 1C can meet the customer's wiring requirements, then the thickness of the upper and lower parts of the phase separation ribs 14 can be kept the same.

[0090] In another case, if the width of the wiring groove 1C still cannot meet the customer's wiring requirements, the thickness of the lower part can be reduced to further increase the width of the wiring groove 1C.

[0091] Please refer to Figure 1 , in the related art, since the base 1 is an integral structure, the shape of the base 1 is sometimes affected by the processing technology. For example, in the Figure 1 shown structure, at the wiring end, the upper and lower parts of the phase separation ribs cannot be designed with different thicknesses.

[0092] Please continue to refer to Figures 4 to 7 , in the application, the splicing part 1D is independent of the body part 1E. When manufacturing the splicing part 1D, the form of upper and lower demolding can be adopted. In this way, the thickness difference between the upper and lower parts of the phase separation ribs can be realized.

[0093] Please continue to refer to Figures 3 to 6 , in some embodiments of the present application, the splicing part 1D includes the parts of n phase separation ribs 14 at the wiring end.

[0094] Along the second direction D2, the parts of the phase separation ribs 14 at the wiring end include an upper part and a lower part. The upper part is the part of the phase separation ribs 14 close to the middle cover 2 of the circuit breaker, and the lower part is the part of the phase separation ribs 14 close to the bottom 11. The thickness of the lower part is less than that of the upper part.

[0095] The upper part is provided with a first mounting hole 143, and a threaded insert is embedded in the first mounting hole 143. The threaded insert is used to install a screw, and the screw is used to connect the base 1 and the middle cover 2 of the circuit breaker.

[0096] Specifically, in the present application, the lower part of the phase separation ribs 14 is the part of the phase separation ribs 14 close to the bottom 11. The customer's wiring part is located at the lower part of the phase separation ribs 14. Therefore, in an embodiment of the present application, the upper part of the phase separation ribs 14 can still be embedded with a threaded insert to improve the connection reliability between the base 1 and the middle cover 2. Only the thickness of the lower part of the phase separation ribs 14 is reduced to increase the width of the wiring groove 1C and improve the user's wiring ability.

[0097] Please continue to refer to Figures 4 to 7, in some embodiments of the present application, the material of the splicing part 1D is bakelite or thermoplastic.

[0098] Specifically, if a threaded insert is still provided on the upper part of the phase isolation rib 14, then the toughness of the phase isolation rib 14 does not need to be considered. Based on this, whether the material of the splicing part 1D is bakelite or thermoplastic can meet the use requirements. Thus, based on the base 1 of the molded case circuit breaker provided by this embodiment, it has the characteristic of a wide selection of materials for the splicing part 1D.

[0099] Please continue to refer to Figures 5 to 6 , in some embodiments of the present application, along the first direction D1, the part of the phase isolation rib 14 at the wiring terminal includes opposite first and second surfaces. Along the third direction D3, both the first and second surfaces include convex parts 141 and concave parts 142, and the convex parts 141 are arranged at the part of the phase isolation rib 14 where the mounting holes are provided, and the convex parts 141 are used to strengthen the wall thickness of the mounting holes. The mounting holes include the first mounting hole 143.

[0100] Specifically, please combine Figure 5 with Figure 8 , or Figure 6 with Figure 8 , in some embodiments of the present application, the phase isolation rib 14 is provided with three mounting holes. One mounting hole provided at the edge part close to the wiring terminal is the arc dividing skin mounting hole 144, and the arc dividing skin mounting hole 144 is used to mount the arc dividing skin. The middle mounting hole is the first mounting hole 143, and the first mounting hole 143 is used to connect the middle cover 2 and the base 1. The other mounting hole is a part of the molded case circuit breaker fixing hole 145, and the other part of the molded case circuit breaker fixing hole 145 is provided on the middle cover 2. The user installs and fixes the molded case circuit breaker through the molded case circuit breaker fixing hole 145.

[0101] Please continue to refer to Figure 5 or Figure 6 , in some embodiments of the present application, the part of the phase isolation rib 14 where the mounting holes are provided is thicker, forming convex parts 141, and the part where no mounting holes are provided is thinner, forming concave parts 142. In this way, both the first and second surfaces of the part of the phase isolation rib 14 at the wiring terminal include convex parts 141 and concave parts 142.

[0102] The wiring terminal needs to connect to an external circuit and is a place where heat is easily generated. Both the first and second surfaces include convex parts 141 and concave parts 142. In this way, the part where the convex parts 141 are provided plays a strengthening role for the phase isolation rib 14. The part where the concave parts 142 are provided can be used as a heat dissipation channel, thereby helping to reduce the temperature rise at the wiring terminal.

[0103] It should be noted that Figure 5 withFigure 6 This is only one implementation mode of the present application. In practical applications, the number of mounting holes in the part of the phase - to - phase isolation rib 14 at the terminal may be one or other numbers. The mounting hole may be a through - hole, a blind hole, or a stepped hole. Therefore, the convex part 141 and the concave part 142 may be set in various different forms, and the present application does not limit this.

[0104] Please continue to refer to Figure 5 , in some implementation modes of the present application, along the second direction D2, a plug - in protrusion 1D3 is provided at one end of the splicing part 1D away from the bottom 11.

[0105] Please combine Figure 5 with Figure 8 , in the present application, along the second direction D2, a plug - in protrusion 1D3 is provided at one end of the splicing part 1D away from the bottom 11. Then, a corresponding plug - in groove 21 will be provided at one end of the middle cover 2 close to the splicing part 1D. In this way, when the base 1 is connected to the middle cover 2, the plug - in protrusion 1D3 of the base 1 is inserted into the plug - in groove 21 to realize the plug - in fit between the two. After the middle cover 2 and the base 1 realize the plug - in fit through the plug - in protrusion 1D3 and the plug - in groove 21, the creepage distance between the phases of the plastic - case circuit breaker will be increased accordingly, which helps with phase - to - phase insulation.

[0106] It should be noted that as an alternative to the implementation mode of the present application, a plug - in groove may also be provided at one end of the splicing part 1D away from the bottom 11. Correspondingly, a corresponding plug - in protrusion is provided at one end of the middle cover 2 close to the splicing part 1D.

[0107] Please continue to refer to Figure 5 , in some implementation modes of the present application, the splicing part 1D includes a first side wall 12, a second side wall 13, and the parts of n phase - to - phase isolation ribs 14 at the terminal. The splicing part 1D also includes a plurality of baffles 1D4.

[0108] Along the first direction D1, in the splicing part 1D, the first side wall 12 and the adjacent phase - to - phase isolation ribs 14, the second side wall 13 and the adjacent phase - to - phase isolation ribs 14, and the adjacent phase - to - phase isolation ribs 14 are connected by the baffles 1D4. And along the third direction D3, the baffles 1D4 are arranged at one ends of the first side wall 12, the second side wall 13, and the phase - to - phase isolation ribs 14 close to the body part 1E.

[0109] Specifically, please continue to refer to Figure 5 , the splicing part 1D not only includes the first side wall 12, the second side wall 13, and the parts of n phase - to - phase isolation ribs 14 at the terminal, but also includes a plurality of baffles 1D4. By arranging the plurality of baffles 1D4, the first side wall 12, the second side wall 13, and the parts of n phase - to - phase isolation ribs 14 at the terminal can be connected into an integral structure. In this way, it is convenient for the production and installation of the splicing part 1D.

[0110] In addition, multiple baffles 1D4 can block the arc, avoiding ablation of the wiring terminals by the arc.

[0111] Please combine Figure 4 with Figure 5 , or Figure 4 with Figure 6 , in some embodiments of the present application, the splicing portion 1D further includes multiple reinforcing ribs 1D5.

[0112] Along the second direction D2, the multiple reinforcing ribs 1D5 are arranged at one end of the first side wall 12, the second side wall 13 and the spaced-apart isolation ribs 14 away from the bottom 11.

[0113] One of the reinforcing ribs 1D5 connects the first side wall 12 and the adjacent spaced-apart isolation rib 14, and also connects the baffle 1D4 between the first side wall 12 and the adjacent spaced-apart isolation rib 14.

[0114] Another reinforcing rib 1D5 connects the second side wall 13 and the adjacent spaced-apart isolation rib 14, and also connects the baffle 1D4 between the second side wall 13 and the adjacent spaced-apart isolation rib 14.

[0115] The remaining reinforcing ribs 1D5 are used to connect adjacent spaced-apart isolation ribs 14 and the baffle 1D4 between the spaced-apart isolation ribs 14, and one reinforcing rib 1D5 is connected between every two adjacent spaced-apart isolation ribs 14.

[0116] Specifically, along the second direction D2, the first reinforcing rib 1D5, the second reinforcing rib 1D5 and the third reinforcing rib 1D5 are arranged at one end of the first side wall 12, the second side wall 13 and the spaced-apart isolation ribs 14 away from the bottom 11. In this way, interference of the first reinforcing rib 1D5, the second reinforcing rib 1D5 and the third reinforcing rib 1D5 with external wiring can be avoided.

[0117] One reinforcing rib 1D5 connects the first side wall 12 and the adjacent spaced-apart isolation rib 14, and also connects the baffle 1D4 between the first side wall 12 and the adjacent spaced-apart isolation rib 14. Another reinforcing rib 1D5 connects the second side wall 13 and the adjacent spaced-apart isolation rib 14, and also connects the baffle 1D4 between the second side wall 13 and the adjacent spaced-apart isolation rib 14. The remaining reinforcing ribs 1D5 are used to connect adjacent spaced-apart isolation ribs 14 and the baffle 1D4 between the spaced-apart isolation ribs 14, and one reinforcing rib 1D5 is connected between every two adjacent spaced-apart isolation ribs 14. In this way, the overall strength of the splicing portion 1D can be improved.

[0118] In the breaking test of the molded case circuit breaker, when the moving contact and the static contact are separated, a huge energy impact will be generated. Enhancement of the overall strength of the splicing portion 1D is beneficial to reducing damage to the splicing portion 1D in the breaking test.

[0119] It is understandable that in this application, the number of the first reinforcing rib 1D5 and the third reinforcing rib 1D5 is one each, and the number of the second reinforcing rib 1D5 is one less than the number of the spaced-apart ribs 14.

[0120] Please continue to refer to Figure 4 and Figure 6 , in some embodiments of this application, along the third direction D3, the spaced-apart ribs 14 include an incoming-line-end rib 14A, a first-region rib 14B, a second-region rib 14C, and an outgoing-line-end rib 14D.

[0121] Among them, the incoming-line-end rib 14A is arranged at the incoming line end 1A, the outgoing-line-end rib 14D is arranged at the outgoing line end 1B, the first-region rib 14B is located in the region mainly affected by closing and opening, and the second-region rib 14C is located between the first-region rib 14B and the outgoing-line-end rib 14D.

[0122] The splicing part 1D is the outgoing-line-end splicing part 1D2, and the splicing part 1D further includes the second-region rib 14C.

[0123] Generally speaking, please combine Figure 4 and Figure 6 , in a molded case circuit breaker, the second-region rib 14C is usually arranged separately, and the second-region rib 14C is connected to the base 1 if necessary.

[0124] In the embodiment provided by this application, the outgoing-line-end splicing part 1D2 includes the second-region rib 1C. In this way, there is no need to separately arrange and install the second-region rib 1C. When the outgoing-line-end splicing part 1D2 and the body part 1E are assembled, the second-region rib 14C is set, which helps to improve the installation efficiency.

[0125] It should be supplemented that in this application, the region mainly affected by closing and opening refers to the region that is deeply affected by the huge energy generated when the moving contact and the static contact are separated during the breaking test of the molded case circuit breaker.

[0126] Those skilled in the art can understand that although some embodiments herein include certain features included in other embodiments rather than other features, the combination of the features of different embodiments means that it is within the scope of this application and forms different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

[0127] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting it. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features. And these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A base for a molded case circuit breaker, characterized in that: The base includes a bottom, a first side wall, a second side wall and n interphase isolation ribs, where n is equal to 1, 2 or 3; Along the first direction, the first side wall, the second side wall, and n interphase isolation ribs are arranged at intervals, and the n interphase isolation ribs are sequentially arranged between the first side wall and the second side wall; along the second direction, the bottom is located at one end of the first side wall, the second side wall, and the n interphase isolation ribs; The base includes a main body portion and a splicing portion; Along the third direction, the base includes a terminal, the splicing portion includes the first side wall, the second side wall and a portion of at least one of the n interphase isolation ribs at the terminal, and the splicing portion is spliced ​​and fixed to the main body; The first direction, the second direction and the third direction are perpendicular to each other.

2. The base of the molded case circuit breaker according to claim 1, characterized in that: The material of the splicing part is thermoplastic plastic, and the splicing part includes the part of n interphase isolation ribs at the connection end; Along the second direction, the interphase isolating rib at the terminal portion includes an upper portion and a lower portion, the upper portion is a portion of the interphase isolating rib close to the circuit breaker middle cover, and the lower portion is a portion of the interphase isolating rib close to the bottom; The upper portion is provided with a first mounting hole, the first mounting hole is used to install a self-tapping screw, and the self-tapping screw is used to connect the base and the circuit breaker middle cover.

3. The base of the molded case circuit breaker according to claim 2, characterized in that: The thickness of the lower portion is equal to the thickness of the upper portion, or the thickness of the lower portion is smaller than the thickness of the upper portion.

4. The base of the molded case circuit breaker according to claim 1, characterized in that: The splicing portion includes n interphase isolation bars at the connection end; Along the second direction, the interphase isolating rib at the terminal portion includes an upper portion and a lower portion, the upper portion is a portion of the interphase isolating rib close to the middle cover of the circuit breaker, the lower portion is a portion of the interphase isolating rib close to the bottom, and the thickness of the lower portion is less than the thickness of the upper portion; The upper portion is provided with a first mounting hole, in which a threaded insert is embedded. The threaded insert is used to install a screw, and the screw is used to connect the base and the middle cover of the circuit breaker.

5. The base of the molded case circuit breaker according to claim 4, characterized in that: The material of the splicing part is bakelite or thermoplastic plastic.

6. The base of the molded case circuit breaker according to any one of claims 2 to 5, characterized in that: Along the first direction, the phase-to-phase isolation rib includes a first surface and a second surface relative to each other at the terminal portion; along the third direction, the first surface and the second surface both include a convex portion and a concave portion, and the convex portion is arranged at a position where the mounting hole of the phase-to-phase isolation rib is arranged, and the convex portion is used to strengthen the hole wall thickness at the mounting hole; the mounting hole includes the first mounting hole.

7. The base of the molded case circuit breaker according to any one of claims 2 to 5, characterized in that: Along the second direction, an inserting protrusion is provided at one end of the splicing portion away from the bottom.

8. The base of the molded case circuit breaker according to any one of claims 1 to 5, characterized in that: The splicing portion includes a first side wall, a second side wall and n interphase isolation ribs at the connection end; The splicing portion further includes a plurality of baffles; Along the first direction, in the splicing portion, the first side wall and the adjacent phase isolation ribs, the second side wall and the adjacent phase isolation ribs, and the adjacent phase isolation ribs are connected by the baffle; and along the third direction, the baffle is arranged at one end of the first side wall, the second side wall and the phase isolation ribs close to the main body.

9. The base of the molded case circuit breaker according to claim 8, characterized in that: The splicing portion further includes a plurality of reinforcing ribs; Along the second direction, a plurality of the reinforcing ribs are arranged on the first side wall, the second side wall and an end of the interlaced isolation ribs away from the bottom; One of the reinforcing ribs connects the first side wall and the adjacent interphase isolation ribs, and connects the baffle between the first side wall and the adjacent interphase isolation ribs; Another reinforcing rib connects the second side wall and the adjacent interphase isolation rib, and connects the baffle between the second side wall and the adjacent interphase isolation rib; The remaining reinforcing ribs are used to connect adjacent interphase isolation ribs and baffles between the interphase isolation ribs, and one reinforcing rib is connected between every two adjacent interphase isolation ribs.

10. The base of the molded case circuit breaker according to claim 8, characterized in that: Along the third direction, the phase isolation ribs include an incoming line isolation rib, a first area isolation rib, a second area isolation rib and an outgoing line isolation rib; The incoming line isolation ribs are arranged at the incoming line end, the outgoing line isolation ribs are arranged at the outgoing line end, the first area isolation ribs are located in the area mainly affected by the closing and opening of the switch, and the second area isolation ribs are located between the first area isolation ribs and the outgoing line isolation ribs; The splicing portion is an outlet end splicing portion, and the splicing portion also includes the second area isolation rib.

Images