Circuit breaker

Abstract

A circuit breaker comprises: a plurality of intermediate housings which form an installation space for accommodating a circuit breaker module; the two side covers are respectively arranged on two sides of the combined middle shell, and a mounting space for accommodating a circuit breaker module or an N-pole module is formed between each side cover and the middle shell; the middle shell is formed by splicing a main shell and a terminal base, a terminal groove is formed in the side, opposite to the terminal base, of the main shell, an adjusting screw base is arranged at the bottom of the terminal groove, a wire passing hole for a wire to penetrate through is formed between the adjusting screw base and the terminal groove, an opening is formed in the side, facing outwards, of the wire passing hole, a detachable interlocking plate is arranged at the opening, and the interlocking plate is connected with the main shell. And the interlocking plate is respectively in limiting fit with the bottom of the terminal groove and the upper side of the adjusting screw seat. The lower side of the terminal groove of each middle shell is provided with an opening for a wire to pass through, the spot-welded wire and the wiring terminal are sequentially placed into the corresponding terminal groove through layer-by-layer installation, finally, the opening is sealed by an interlocking rod, and meanwhile, the reliability between the wire and the wiring terminal is realized by utilizing the upper and lower limiting of the interlocking rod. And the problem that the strength of the position is not enough due to adjustment of the adjusting screw seat is avoided.

Description

Technical Field

[0001] The utility model specifically relates to a circuit breaker. Background Art

[0002] Patent CN220569624U, which was applied for by the applicant on August 23, 2023 and authorized on March 8, 2024, discloses a circuit breaker that is easy to install by spot welding. It is mainly aimed at LN two-level circuit breakers. It can realize automatic spot welding of LN circuit breakers and then carry out subsequent assembly. However, for multi-P circuit breakers, such as 3-phase plus N-pole circuit breakers, due to the large number of intermediate shells, the wires and wiring frames after spot welding are not easy to pass through the intermediate shells. Therefore, the technical solution of the prior application cannot be directly used for the spot welding assembly of multi-P circuit breakers. Utility Model Content

[0003] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a circuit breaker.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A circuit breaker, comprising:

[0006] A plurality of intermediate housings, which form an installation space for accommodating the circuit breaker module;

[0007] Two side covers, which are respectively arranged on both sides of the assembled intermediate housing, and form installation spaces for accommodating the circuit breaker module or the N-pole module between the side covers and the intermediate housing;

[0008] The intermediate shell is formed by splicing the main shell and the terminal seat. A terminal slot is provided on the side of the main shell opposite to the terminal seat. An adjusting screw seat is provided at the bottom of the terminal slot, and a wire hole for the wire to pass through is provided between the adjusting screw seat and the terminal slot. An opening is provided on the outward side of the wire hole, and a detachable interlocking plate is provided at the opening, and the interlocking plate forms a limiting fit with the bottom of the terminal slot and the upper side of the adjusting screw seat respectively.

[0009] A limiting groove is provided at the bottom of the terminal groove, and a limiting block matched with the limiting groove is provided at one end of the interlocking plate.

[0010] A tenon groove is arranged on the upper side of the adjusting screw seat, and a tenon matched with the tenon groove is arranged at the other end of the interlocking plate.

[0011] A positioning column is provided on one side of the intermediate housing or the side cover corresponding to the terminal slot, and a positioning hole matched with the positioning column is provided on the side cover or the intermediate housing matched therewith.

[0012] The interlocking plate is restricted by two side covers and arranged at the opening of the intermediate shell.

[0013] The interlocking plate is provided with a through hole which is arranged through the interlocking plate, and the side cover is provided with a pin shaft for locking, and the pin shaft passes through the through hole of the interlocking plate and is detachably connected with the side plate on the other side.

[0014] The connection terminals at the terminal slots in the installation space formed by the two side covers and the middle shell can be interchanged through the wires passing through the wire holes.

[0015] Both ends of the combined side cover and the middle shell are provided with flip covers.

[0016] The flip cover is provided with a groove arranged along the width direction of the combined side cover and the intermediate shell, and both ends of the groove are provided with through holes, and the upper side of the side cover is provided with a lead sealing protrusion that can pass through the through holes.

[0017] The height of the lead seal protrusion is not higher than the depth of the groove.

[0018] The beneficial effects of the utility model are as follows: an opening for the wire to pass through is provided on the lower side of the terminal slot of each intermediate shell, and the wires and the wiring terminals after spot welding are installed layer by layer and placed into the corresponding terminal slots in sequence, and finally the opening is closed by the interlocking rod, and the upper and lower limits of the interlocking rod are used to achieve reliability between the two, thereby avoiding the problem of insufficient strength at this position caused by the adjustment of the adjusting screw seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model.

[0020] Figure 2 It is an explosion diagram of the utility model.

[0021] Figure 3 It is an internal schematic diagram of the utility model.

[0022] Figure 4 It is a schematic diagram of the cooperation between the interlocking plate and the intermediate housing of the utility model.

[0023] Figure 5 It is an exploded schematic diagram of the intermediate shell of the utility model.

[0024] Figure 6 It is a partial schematic diagram of the terminal slot of the present utility model.

[0025] Figure 7 It is a structural schematic diagram of the interlocking plate of the utility model.

[0026] Figure 8 It is a schematic structural diagram of another intermediate shell of the utility model. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] The utility model provides a circuit breaker, which comprises:

[0030] A plurality of intermediate housings 1 are provided, and an installation space for accommodating the circuit breaker module is formed between them. The intermediate housings are assembled together to form a multi-P circuit breaker, and the two sides cooperate with the side covers to form a complete circuit breaker;

[0031] Two side covers 2, which are respectively arranged on both sides of the assembled intermediate housing, and form installation spaces for accommodating the circuit breaker module or the N-pole module between the side covers and the intermediate housing;

[0032] The intermediate housing is formed by splicing the main housing 15 and the terminal seat 14, wherein the terminal seat and the main housing are spliced ​​together, wherein the terminal seats of each intermediate housing are connected to the side cover through a pin shaft to achieve a fastening connection, and the main housing is provided with a terminal slot 12 for placing the wiring terminal 6 on the side opposite to the terminal seat, and an adjusting screw seat 13 is provided at the bottom of the terminal slot, and a wire hole for the wire to pass through is provided between the adjusting screw seat and the terminal slot, and an opening 111 is provided on the outward side of the wire hole 11, and the design of the opening allows the wires of the circuit breaker module 7 that have been spot-welded with the wiring terminal in advance to pass through the opening for each layer. The installation is carried out layer by layer, and the design of the openings can also realize the interchangeability of the N-pole terminals. The N-pole terminals can be placed in any installation space through wires, and can be in the same installation space or a different installation space as the N-pole module. The specific principle is as shown in the Chinese patent CN113725041A applied for by the applicant on August 12, 2021, so it is not described in detail. Due to the existence of the openings, after splicing, the openings are connected in a straight line, which causes the strength at this location to become low and easy to deform. Therefore, a detachable interlocking plate is provided at the opening, and the interlocking plate is respectively limited with the bottom of the terminal slot and the upper side of the adjusting screw seat.

[0033] At the same time, the intermediate housing is composed of the main housing 15 and the terminal seat 14. The upper and lower sides of the terminal seat are provided with hooks 141, which are engaged with the main housing to make the connection between the two more reliable without any gap. Its specific structure is the technical solution described in the prior patent CN220569624U, so this application will not describe it in detail.

[0034] The interlocking plate is used to realize the limiting connection on the upper and lower sides of the opening 111. At the same time, the interlocking plate is a long strip structure, so when in use, the entire opening is completely closed. When in use, the strength of each intermediate shell is achieved by the interlocking plate, which limits the upper and lower positions and tightens the terminal slot and the adjusting screw seat.

[0035] The shells are assembled in a way that reduces the difficulty of assembly and enables streamlined production to improve production efficiency.

[0036] The adjusting screw seat is used for placing the adjusting screw 5 for adjusting the double gold sheet, and a tenon groove is formed at the upper end thereof.

[0037] The opening cooperates with the wire hole to complete the spot welding connection between the circuit board and parts such as the terminal block in advance, making the connection more reliable. At the same time, by assembling them in the corresponding installation space in sequence, the wires and terminals of each layer enter the next layer through the wire hole. The side entry method can avoid the problem of the terminal block being unable to be installed due to its size.

[0038] However, due to the existence of the opening, the strength of the shell will be affected by the force applied to the adjusting screw seat due to the upper and lower separation. Therefore, a detachable interlocking plate is added to directly block the openings of multiple intermediate shells, and the upper and lower limit switches are used to increase the strength between the two.

[0039] The bottom of the terminal slot is provided with a limiting slot 121, and one end of the interlocking plate is provided with a limiting block 41 adapted to the limiting slot. The limiting block is embedded in the limiting slot so that it and the intermediate housing form a limit in the wiring direction.

[0040] A mortise 131 is provided on the upper side of the adjusting screw seat, and a tenon 42 matched with the mortise is provided at the other end of the interlocking plate. The tenon cooperates with the mortise to fix the bottom. At the same time, the mortise and tenon joint method is adopted to make its strength more reliable and to limit the inner and outer directions.

[0041] A positioning column 22 is provided on the side of the intermediate shell or side cover corresponding to the terminal slot, and a positioning hole 43 adapted to the positioning column is provided on the side cover or intermediate shell that cooperates with it. Through the cooperation of the positioning column and the positioning hole, the connection strength between the connected intermediate shell or the side cover can be improved, making it more fastened and reliable.

[0042] The interlocking plate is restricted by two side covers and arranged at the opening of the intermediate shell.

[0043] The interlocking plate 4 is provided with a through hole, and the side cover is provided with a pin for locking. The pin passes through the through hole of the interlocking plate and is detachably connected to the side plate on the other side. The fixed connection between the middle shell of the side cover and the interlocking plate is achieved through the pin.

[0044] The wiring terminals at the terminal slots within the installation space formed by the two side covers and the intermediate shell, such as the N terminal, can be interchanged by means of the wire 8 through the wire hole. The specific principle is as shown in the Chinese patent CN113725041A applied by the applicant on August 12, 2021, so it is not described in detail. By interchangeable terminals, different wiring methods can be converted, and the same circuit breaker can be connected through simple wires to realize the design of N terminals in different installation spaces, thereby reducing costs. There is no need to open two sets of molds to realize the design of two circuit breakers with N terminals on the right or on the left.

[0045] Both ends of the combined side cover and the middle shell are provided with flip covers 3, which play a protective role.

[0046] The flip cover is provided with a groove 31 arranged along the width direction of the combined side cover and the intermediate shell, and both ends of the groove are provided with through holes. The upper side of the side cover is provided with a lead seal protrusion 21 that can pass through the through holes. The design hidden in the groove can prevent the lead seal from protruding extra, thereby improving the aesthetics of the entire product.

[0047] The height of the lead seal protrusion is no higher than the depth of the groove, making the entire circuit breaker more beautiful and elegant.

[0048] The embodiments should not be regarded as limiting the present invention, but any improvements based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. A circuit breaker, characterized in that: It includes: A plurality of intermediate housings, which mutually form an installation space for accommodating the circuit breaker module; Two side covers, which are respectively arranged on both sides of the assembled intermediate housing, and form installation spaces for accommodating the circuit breaker module or the N-pole module between the side covers and the intermediate housing; The intermediate shell is formed by splicing the main shell and the terminal seat. A terminal slot is provided on the side of the main shell opposite to the terminal seat. An adjusting screw seat is provided at the bottom of the terminal slot, and a wire hole for the wire to pass through is provided between the adjusting screw seat and the terminal slot. An opening is provided on the outward side of the wire hole, and a detachable interlocking plate is provided at the opening, and the interlocking plate forms a limiting fit with the bottom of the terminal slot and the upper side of the adjusting screw seat respectively.

2. A circuit breaker according to claim 1, characterized in that: A limiting groove is provided at the bottom of the terminal groove, and a limiting block matched with the limiting groove is provided at one end of the interlocking plate.

3. A circuit breaker according to claim 2, characterized in that: A tenon groove is arranged on the upper side of the adjusting screw seat, and a tenon matched with the tenon groove is arranged at the other end of the interlocking plate.

4. A circuit breaker according to claim 1, 2 or 3, characterized in that: A positioning column is provided on one side of the intermediate housing or the side cover corresponding to the terminal slot, and a positioning hole matched with the positioning column is provided on the side cover or the intermediate housing matched therewith.

5. A circuit breaker according to claim 1, characterized in that: The interlocking plate is restricted by two side covers and arranged at the opening of the intermediate shell.

6. A circuit breaker according to claim 5, characterized in that: The interlocking plate is provided with a through hole which is arranged through the interlocking plate, and the side cover is provided with a pin shaft for locking, and the pin shaft passes through the through hole of the interlocking plate and is detachably connected with the side plate on the other side.

7. A circuit breaker according to claim 1, characterized in that: The connection terminals at the terminal slots in the installation space formed by the two side covers and the intermediate housing can be interchanged through wires passing through the wire holes.

8. A circuit breaker according to claim 1, characterized in that: Both ends of the combined side cover and the middle shell are provided with flip covers.

9. A circuit breaker according to claim 8, characterized in that: The flip cover is provided with a groove arranged along the width direction of the combined side cover and the intermediate shell, and both ends of the groove are provided with through holes, and the upper side of the side cover is provided with a lead sealing protrusion that can pass through the through holes.

10. A circuit breaker according to claim 9, characterized in that: The height of the lead seal protrusion is not higher than the depth of the groove.

Images