Base of low-voltage circuit breaker

Abstract

The invention relates to a base of a low-voltage circuit breaker. The base comprises a first substrate and a second substrate, the first substrate and the second substrate can be in butt joint with each other to form a base, and groove bodies are formed in the butt joint faces respectively to form a cavity in a butt joint mode. The bases can be in butt joint with each other to form a base set. Compared with the prior art, on the premise that the positions of a driving mechanism and a contact system of the circuit breaker are not changed, the connection strength is improved, the insulativity between the two substrates is compensated for, and the strength and the operation reliability of the circuit breaker are enhanced through structural improvement of the attaching connection surfaces, the connection structures and the like on the substrates.

Description

Technical Field

[0001] This invention belongs to the field of circuit breaker technology and relates to a base for a low-voltage circuit breaker. Background Technology

[0002] Low-voltage frame circuit breakers are high-capacity low-voltage electrical devices mainly used in industrial power systems to ensure the normal connection and disconnection of circuits, as well as to automatically disconnect circuits under abnormal conditions (such as overload and short circuit).

[0003] During the opening and closing of a circuit breaker, an electric arc and heat are generated within the contact cavity. The release of this energy can damage the circuit breaker. Existing frame circuit breakers lack arc isolation structures between the base plates and also lack reliable connection structures. The release of energy allows the arc to propagate, causing phase-to-phase short circuits, affecting the circuit breaker's operational life, and ultimately damaging the load. Summary of the Invention

[0004] The purpose of this invention is to provide a base for a low-voltage circuit breaker to improve the connection reliability of the base structure.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A base for a low-voltage circuit breaker includes a first substrate and a second substrate;

[0007] The first substrate and the second substrate can be mated together to form a base, and grooves are respectively provided on the mating surfaces to form cavities; the bases can be mated together to form a base group.

[0008] The first substrate has a stepped groove on the inner edge of the groove opening, and the second substrate has a corresponding rib on the inner edge of the groove opening. When the substrates are joined together, the rib is embedded in the stepped groove.

[0009] The first substrate and the second substrate have mounting holes facing each other on their mating surfaces, and the mating mounting holes are connected by inserting pins.

[0010] The first substrate and the second substrate have through holes on their outer walls along the substrate docking direction, and the first substrate and the second substrate are connected by a shaft that passes through the through holes on both sides.

[0011] On the first substrate and the second substrate, a first limiting groove is provided between the outer wall and the substrate mating surface. The first limiting groove is constricted along the mating direction. When the substrates are mated, the first limiting grooves on both sides are connected to form a funnel-shaped limiting groove, and are connected by a first tenon that is fitted into the funnel-shaped limiting groove.

[0012] On the first substrate and the second substrate, a second limiting groove is also provided between the base mating surface and the outer wall. When the first substrate of the base is connected to the second substrate of the other base, the second limiting groove is narrowed along the base mating direction. When the bases are mated, the second limiting grooves on both sides are connected to form a funnel-shaped limiting groove, and are connected by a second tenon that is fitted into the funnel-shaped limiting groove.

[0013] Furthermore, the outer walls of the first substrate and the second substrate are respectively provided with mating slots, the mating slots extend and communicate with the mating surface, and the two mating slots are connected by a connecting plate.

[0014] The docking slot is located at the inner edge of the opening on the outer wall, and a limiting flange is also provided to limit one section of the connecting plate within the docking slot.

[0015] Furthermore, a crossbeam is provided between adjacent bases, and when the bases are joined, the two ends of the crossbeam are riveted to the connecting plates on the corresponding bases.

[0016] Furthermore, the first or second limiting groove includes a dovetail groove segment opening towards the corresponding docking direction, and a straight groove segment connecting the narrowed end of the dovetail groove segment with the corresponding docking surface.

[0017] Accordingly, the first tenon or the second tenon includes dovetail limiting blocks disposed on opposite sides and a straight connecting block connecting the dovetail limiting blocks on both sides.

[0018] During docking, the dovetail limiting block is embedded in the dovetail groove section, and the straight connecting block is embedded in the straight groove section.

[0019] Furthermore, the first or second limiting groove includes a first straight groove segment and a second straight groove segment connecting the first straight groove segment and the corresponding mating surface; the width of the first straight groove segment perpendicular to the mating direction is greater than the width of the second straight groove segment;

[0020] Accordingly, the first tenon or the second tenon includes straight limiting blocks disposed on opposite sides and a straight connecting block connecting the two straight limiting blocks; the width of the straight limiting block perpendicular to the mating direction is greater than the width of the straight connecting block;

[0021] During docking, the straight limiting block is embedded in the first straight groove segment, and the straight connecting block is embedded in the straight groove segment.

[0022] Furthermore, the first or second limiting groove is a dovetail groove segment with an opening facing the corresponding mating direction; correspondingly, the first or second tenon includes dovetail limiting blocks that are connected to each other.

[0023] During docking, the dovetail limiting block is embedded in the dovetail groove section.

[0024] Furthermore, wiring grooves are respectively formed on the base mating surfaces of the first substrate and the second substrate.

[0025] When the bases are connected, the wiring grooves are aligned to form a wiring channel.

[0026] Furthermore, through holes are respectively opened on the outer walls of the first substrate and the second substrate, on the side and bottom of the groove, and are connected by corresponding shafts.

[0027] Furthermore, when the bases are connected, the shaft passes through the through holes on the adjacent bases.

[0028] Furthermore, mounting holes are respectively provided on the outer walls of the first substrate and the second substrate, on the side and bottom of the groove, and the mating mounting holes are connected by corresponding insertion pins.

[0029] This invention aims to design a base for a low-voltage circuit breaker. Left and right base plates are spliced ​​together to form one base, and multiple bases are spliced ​​together to form a multi-pole structure. Multiple tenon-and-groove joints and mortise-and-tenon structures are provided between the base plates, and cylindrical pins are used for positioning. Screws and nuts are also used for fastening the connection, allowing it to carry large currents and preventing arcing. Small tenon-and-tenon connections are used between the left and right base plates, and large tenon-and-tenon connections are used between multiple bases, which are fixed with long shafts and crossbeams to ensure phase-to-phase synchronization and connection reliability of the circuit breaker. Furthermore, wiring grooves are provided on the side of the base.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] This invention, without changing the position of the circuit breaker drive mechanism and contact system, increases the connection strength and compensates for the insulation between the two substrates by improving the structure of the bonding surface and connection structure on the substrate, thereby enhancing the strength and operational reliability of the circuit breaker. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the assembly structure of the bipolar base in this invention;

[0033] Figure 2 This is a schematic diagram of the assembly structure of the bipolar base (one of its second substrates is not shown) in this invention;

[0034] Figure 3 This is a schematic diagram of the base structure in this invention;

[0035] Figure 4 , Figure 5 This is a schematic diagram of the structure of the first substrate;

[0036] Figure 6 , Figure 7 This is a schematic diagram of the structure of the second substrate;

[0037] Figure 8 , Figure 9 , Figure 10 This is a schematic diagram of the second tenon;

[0038] Explanation of markings in the diagram:

[0039] 1-First substrate, 111-Stepped groove, 171-Through hole, 2-Second substrate, 211-Rib, 3-Crossbeam, 4-Second tenon, 5-First tenon, 6-Shaft, 7-Connecting plate, 8-Pin, 10-Base. Detailed Implementation

[0040] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The following embodiments are based on the above-described technical solutions of the present invention, providing detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments.

[0041] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0042] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features described herein can be combined with each other.

[0043] Example:

[0044] A base for a low-voltage circuit breaker includes a first substrate 1 and a second substrate 2. The first substrate 1 and the second substrate 2 can be mated together to form a base 10, and grooves are respectively formed on the mating surfaces to form cavities; the bases 10 can be mated together to form a base assembly.

[0045] To ensure the stability of the mating installation between substrates, this embodiment uses the insertion and cooperation of ribs and grooves to form a first mating structure, specifically including: the inner edge of the groove opening of the first substrate 1 is provided with a stepped groove 111, and the inner edge of the groove opening of the second substrate 2 is provided with a corresponding rib 211. When the substrates are mated, the rib 211 is embedded in the stepped groove 111; preferably, the rib 211 and the stepped groove 111 are distributed on the outer periphery of the groove, including the two sides and the bottom of the groove, so as to improve the mating effect from different directions.

[0046] This embodiment also utilizes pin-hole mating to form another docking structure, specifically including: mounting holes are provided opposite to each other on the mating surfaces of the first substrate 1 and the second substrate 2, and the mating mounting holes are connected by inserting pins 8; the length of the pins 8 is approximately equal to the total length of the mounting holes on both sides, so that there is no gap after the first substrate 1 and the second substrate 2 are mated. Preferably, mounting holes are respectively provided on the outer walls of the first substrate 1 and the second substrate 2, located on the side and bottom of the groove, and the mating mounting holes are connected by corresponding inserting pins 8. The pins 8 distributed around the outer perimeter of the groove improve the docking effect between the first substrate 1 and the second substrate 2 from different directions; at the same time, they ensure the uniqueness of the vertical and horizontal positions and the synchronization of the contacts;

[0047] In some specific embodiments, pin 8 is a cylindrical pin.

[0048] This embodiment also employs a shaft-hole insertion connection to form another docking structure, specifically including: through holes 171 are respectively formed on the outer walls of the first substrate 1 and the second substrate 2 along the substrate docking direction, and the first substrate 1 and the second substrate 2 are connected by shafts 6 passing through the through holes 171 on both sides. Preferably, through holes 171 are respectively formed on the outer walls of the first substrate 1 and the second substrate 2, located on the side and bottom of the groove, and are connected by corresponding shafts 6.

[0049] This embodiment also employs a plug-in structure to form another docking structure, specifically including: docking slots are respectively provided on the outer walls of the first substrate 1 and the second substrate 2, the docking slots extend and communicate with the docking surfaces, and the two docking slots are connected by a plug-in connecting plate 7; a limiting flange is also provided at the inner edge of the opening on the outer wall of the docking slot, and a section of the connecting plate 7 is limited within the docking slot. Furthermore, the connecting plate 7 can be installed and connected to the first substrate 1 and the second substrate 2 via a riveting structure.

[0050] This embodiment also forms another docking structure by tenon and mortise insertion, specifically including: a first limiting groove is provided between the outer wall and the docking surface of the first substrate 1 and the second substrate 2. The first limiting groove is constricted along the docking direction. When the substrates are docked, the first limiting grooves on both sides are connected to form a funnel-shaped limiting groove, and are connected by a first tenon 5 that is fitted into the funnel-shaped limiting groove.

[0051] In some specific embodiments, the first substrate 1 and the second substrate 2 are fastened together by multiple screws.

[0052] To ensure the stability of the docking installation between the bases, this embodiment also uses a shaft 6 to connect the through holes 171 on adjacent bases 10, so that multiple bases 10 are connected in series, thereby ensuring the reliability of the interconnection between the bases 10.

[0053] On the other hand, in this embodiment, a crossbeam 3 is also provided between adjacent bases 10. When the bases 10 are connected, the two ends of the crossbeam 3 are riveted to the connecting plate 7 on the corresponding base 10.

[0054] In addition, this embodiment can also be fitted by tenon and mortise joint, specifically including: on the first base plate 1 and the second base plate 2, between the base mating surface and the outer wall, a second limiting groove is also provided. When the first base plate 1 of the base 10 is connected to the second base plate 2 of the other base 10, the second limiting groove is narrowed along the base mating direction. When the bases are mated, the second limiting grooves on both sides are connected to form a funnel-shaped limiting groove, and are connected by a second tenon 4 that is fitted into the funnel-shaped limiting groove.

[0055] More specifically, the first or second limiting groove includes a dovetail groove section with an opening facing the corresponding docking direction, and a straight groove section connecting the narrowed opening of the dovetail groove section with the corresponding docking surface.

[0056] Correspondingly, the first tenon 5 or the second tenon 4 includes dovetail limiting blocks disposed on opposite sides and a straight connecting block connecting the dovetail limiting blocks on both sides.

[0057] During docking, the dovetail limiting block is embedded in the dovetail groove section, and the straight connecting block is embedded in the straight groove section.

[0058] The shape of the tenon is not unique. When the shape of the tenon changes, the corresponding mortise on the base also changes accordingly. Figure 9 or Figure 10 The shape can also be other shapes that ensure reliable connection between the substrate or base, with a narrow middle and wide ends.

[0059] like Figure 9 As shown, the first or second limiting groove includes a first straight groove segment and a second straight groove segment connecting the first straight groove segment and the corresponding mating surface; the width of the first straight groove segment perpendicular to the mating direction is greater than the width of the second straight groove segment.

[0060] Correspondingly, the first tenon 5 or the second tenon 4 includes straight limiting blocks disposed on opposite sides and a straight connecting block connecting the two straight limiting blocks; the width of the straight limiting block perpendicular to the mating direction is greater than the width of the straight connecting block.

[0061] During docking, the straight limiting block is embedded in the first straight groove section, and the straight connecting block is embedded in the straight groove section.

[0062] like Figure 10 As shown, the first or second limiting groove is a dovetail groove segment with an opening in the corresponding mating direction; correspondingly, the first tenon 5 or the second tenon 4 includes dovetail limiting blocks that are connected to each other.

[0063] During docking, the dovetail limiting block is embedded in the dovetail groove section.

[0064] In some specific embodiments, wiring grooves 101 are respectively provided on the base mating surfaces of the first substrate 1 and the second substrate 2. When the bases are mated, the wiring grooves 101 are connected to form a wiring channel, which facilitates wire threading.

[0065] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the invention should be within the protection scope of the present invention.

Claims

1. A base for a low voltage circuit breaker, characterized in that The first substrate (1) and the second substrate (2) can be mutually docked to form a base (10), and each is provided with a groove on the docking surface to form a cavity; the bases (10) can be mutually docked to form a base group; The inner edge of the groove opening of the first substrate (1) is provided with a stepped groove (111), and the inner edge of the groove opening of the second substrate (2) is correspondingly provided with a rib (211), and when the substrates are docked, the rib (211) is embedded in the stepped groove (111); The first substrate (1) and the second substrate (2) are respectively provided with mounting holes on the substrate docking surface, and the mounting holes of the substrates are connected by a pin (8) through insertion; The first substrate (1) and the second substrate (2) are respectively provided with through holes (171) on the outer wall along the substrate docking direction, and the first substrate (1) and the second substrate (2) are connected by a shaft (6) penetrating through the through holes (171) on both sides; The first substrate (1) and the second substrate (2) are respectively provided with first limiting grooves between the outer wall and the substrate docking surface, and the first limiting grooves are in the shape of a funnel along the docking direction, and the first limiting grooves on both sides are connected to form a funnel-shaped limiting groove when the substrates are docked, and the first tenon (5) is connected by being embedded in the funnel-shaped limiting groove; The first substrate (1) and the second substrate (2) are respectively provided with first limiting grooves between the outer wall and the substrate docking surface, and the first limiting grooves are in the shape of a funnel along the docking direction, and the first limiting grooves on both sides are connected to form a funnel-shaped limiting groove when the substrates are docked, and the first tenon (5) is connected by being embedded in the funnel-shaped limiting groove; The first substrate (1) and the second substrate (2) are respectively provided with first limiting grooves between the outer wall and the substrate docking surface, and the first limiting grooves are in the shape of a funnel along the docking direction, and the first limiting grooves on both sides are connected to form a funnel-shaped limiting groove when the substrates are docked, and the first tenon (5) is connected by being embedded in the funnel-shaped limiting groove; 2. The base of a low voltage circuit breaker according to claim 1, characterized in that The first substrate (1) and the second substrate (2) are respectively provided with first limiting grooves between the outer wall and the substrate docking surface, and the first limiting grooves are in the shape of a funnel along the docking direction, and the first limiting grooves on both sides are connected to form a funnel-shaped limiting groove when the substrates are docked, and the first tenon (5) is connected by being embedded in the funnel-shaped limiting groove; The first substrate (1) and the second substrate (2) are respectively provided with first limiting grooves between the outer wall and the substrate docking surface, and the first limiting grooves are in the shape of a funnel along the docking direction, and the first limiting grooves on both sides are connected to form a funnel-shaped limiting groove when the substrates are docked, and the first tenon (5) is connected by being embedded in the funnel-shaped limiting groove; 3. The base of a low voltage circuit breaker according to claim 2, characterized in that The first limiting groove or the second limiting groove includes a dovetail groove section with an opening facing the corresponding docking direction, and a straight groove section connected to the dovetail groove section; 4. The base of a low voltage circuit breaker of claim 1, wherein, Correspondingly, the first tenon (5) or the second tenon (4) includes dovetail limiting blocks oppositely arranged on both sides and a straight connecting block connecting the dovetail limiting blocks on both sides; When docked, the dovetail limiting blocks are limitedly embedded in the dovetail groove section, and the straight connecting block is embedded in the straight groove section. The first limiting groove or the second limiting groove includes a first straight groove section and a second straight groove section connected to the first straight groove section and the corresponding docking surface; the width of the first straight groove section perpendicular to the docking direction is greater than the width of the second straight groove section.

5. The base of a low voltage circuit breaker of claim 1, wherein, ​ Correspondingly, the first tenon (5) or the second tenon (4) comprises straight limiting blocks oppositely arranged on two sides and straight connecting blocks connecting the straight limiting blocks on the two sides; the width of the straight limiting blocks perpendicular to the direction of butt joint is greater than the width of the straight connecting blocks; During butt joint, the straight limiting blocks are embedded in the first straight groove section, and the straight connecting blocks are embedded in the straight groove section.

6. The base of a low voltage circuit breaker of claim 1, wherein, The first limiting groove or the second limiting groove is a dovetail groove section with an opening facing the corresponding butt joint direction; correspondingly, the first tenon (5) or the second tenon (4) comprises dovetail limiting blocks oppositely connected; During butt joint, the dovetail limiting blocks are limitingly embedded in the dovetail groove section.

7. The base of a low voltage circuit breaker of claim 1, wherein, The base butt joint surface of the first base plate (1) and the second base plate (2) is respectively provided with a wiring groove (101), During base butt joint, the wiring grooves (101) oppositely butt joint to form a wiring channel.

8. The base of a low voltage circuit breaker of claim 1, wherein, The outer wall of the first base plate (1) and the second base plate (2) is respectively provided with a through hole (171) on the side edge and the bottom of the groove body, and is connected by a corresponding shaft (6).

9. The base of a low voltage circuit breaker of claim 1, wherein, During butt joint of the base (10), the shaft (6) penetrates through the through holes (171) on the adjacent bases (10) to connect them.

10. The base of a low voltage circuit breaker of claim 1, wherein, The outer wall of the first base plate (1) and the second base plate (2) is respectively provided with a mounting hole on the side edge and the bottom of the groove body, and the mounting holes of the butt joint are connected by a corresponding inserted pin (8).

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