A molded case circuit breaker

Abstract

The present application relates to a molded case circuit breaker, and relates to the technical field of circuit breakers, which comprises a shell base, an electrical component located in the shell base, and a shell cover fixedly mounted on the shell base, wherein the shell cover is provided with a plurality of fixing through holes, and the shell base is provided with fixing screw holes that coincide with the fixing through holes; a plurality of positioning rods are provided on the side of the shell cover facing the shell base, and the shell base is provided with positioning slots for inserting the positioning rods; due to the coordinated arrangement of the positioning rods and the positioning slots, when the shell cover and the shell base are assembled and fixed, the shell cover and the shell base are aligned and abutted, at which time the positioning rods are inserted into the corresponding positioning slots, and screws are used to penetrate the fixing through holes and then screwed into the corresponding fixing screw holes; the possibility of the shell cover and the shell base being misaligned again and requiring realignment when the screws are used to fasten the shell cover and the shell base is reduced, thereby improving the assembly efficiency of the shell cover and the shell base.

Description

Technical Field

[0001] The present application relates to the technical field of circuit breakers, and in particular to a molded case circuit breaker. Background Art

[0002] Molded case circuit breakers, also known as molded case circuit breakers, are a common electrical equipment protection device. Its main function is to automatically cut off the circuit when the current exceeds the trip setting to protect the power system from overload and short circuit damage. Molded case circuit breakers are widely used in industrial, commercial and civil fields due to their simple structure, easy installation and reliable use.

[0003] In the related art, a molded case circuit breaker generally includes a housing, electrical components located inside the housing, such as an operating system, a contact system, and an arc extinguishing system, and a housing cover mounted on the housing. These electrical components are essential for protecting the normal operation of the circuit and avoiding failures.

[0004] However, during the assembly process of the molded case circuit breaker, the cover and the housing are often fixed by bolts, which has obvious shortcomings. Specifically, when assembling the cover and the housing, it is necessary to ensure that the fixing holes on the housing and the cover are accurately aligned, which not only increases the difficulty of assembly, but also requires accurate re-alignment after being misaligned due to external interference, so there is room for improvement. Summary of the invention

[0005] The purpose of the present application is to provide a molded case circuit breaker to solve the problem that the assembly process of the housing and the housing cover in the above-mentioned related technology is relatively complicated and inefficient.

[0006] The present application provides a molded case circuit breaker adopting the following technical solution:

[0007] A molded case circuit breaker comprises a shell base, an electrical component located in the shell base and a shell cover fixed on the shell base, wherein the shell cover is provided with a plurality of fixing through holes, and the shell base is provided with fixing screw holes that coincide with the fixing through holes; a plurality of positioning rods are arranged on the side of the shell cover facing the shell base, and the shell base is provided with positioning slots for the positioning rods to be inserted.

[0008] By adopting the above technical solution, when the shell cover and the shell base are assembled and fixed, the shell cover and the shell base are aligned and abutted, and the positioning rod is inserted into the corresponding positioning slot, and the screw is passed through the fixing through hole and then screwed into the corresponding fixing screw hole; due to the coordinated setting of the positioning rod and the positioning slot, the possibility of the shell cover and the shell base being misaligned again and requiring realignment when the screws tighten them is reduced, thereby improving the assembly efficiency of the shell cover and the shell base.

[0009] Optionally, a guiding slope is provided on the end edge of the positioning rod.

[0010] By adopting the above technical solution, when the shell covers are aligned and abutted against each other, it is convenient for the positioning rod to be inserted into the corresponding positioning slot along the guiding inclined surface.

[0011] Optionally, a blocking plate engaged with the positioning rod is provided on the inner wall of the shell cover.

[0012] By adopting the above technical solution, the positioning rod and the shell are installed and fixed due to the connection setting of the blocking plate.

[0013] Optionally, the blocking plate is slidably disposed on the inner wall of the shell cover, and the shell cover is provided with an adjusting member for driving the blocking plate to move toward the shell seat and fix it.

[0014] By adopting the above technical solution, due to the setting of the adjustment member, the staff can quickly and accurately adjust the insertion depth of the positioning rod through the adjustment member according to actual needs, so as to adapt to different work scenes or task requirements.

[0015] Optionally, limiting sliding blocks are relatively fixedly disposed on the inner wall of the shell cover, and limiting sliding grooves for inserting the edges of the blocking plates are provided on the sides of the two limiting sliding blocks that are close to each other.

[0016] By adopting the above technical solution, due to the installation of the limit slider on the inner wall of the shell cover, during the sliding process of the blocking plate, the limit sliding groove on the limit slider is used for limiting, thereby reducing the possibility of the blocking plate loosening during the sliding process.

[0017] Optionally, a plurality of heat dissipation holes are provided on the side surface of the shell cover, and blocking holes corresponding to the heat dissipation holes are provided on the blocking plate, and the adjusting member can drive the blocking holes to overlap or misalign with the heat dissipation holes.

[0018] By adopting the above technical solution, after the shell cover and the shell base are installed, due to the setting of the heat dissipation through-holes and the blocking through-holes, the user can adjust the heat dissipation performance of the molded case circuit breaker according to actual conditions. When the environment is hot, the blocking through-holes and the heat dissipation through-holes can be adjusted to a coincidence state to improve the heat dissipation performance; when the environment is humid, the blocking through-holes and the heat dissipation through-holes can be adjusted to a misalignment state.

[0019] Optionally, the adjusting member includes a damping spring fixedly mounted on the baffle plate, an accommodating groove for inserting the damping spring is provided on the inner wall of the shell cover, and a guide through hole with a waist-shaped cross-section for inserting a part of the damping spring is provided on the inner side of the accommodating groove; the damping spring can slide back and forth along the length direction of the guide through hole toward the shell seat, an adjusting rod inserted into the guide through hole is fixedly mounted on the side of the damping spring away from the baffle plate, an adjusting cover is fixedly mounted on the end of the adjusting rod extending to the outside of the shell cover, a clamping block is fixedly mounted on the outer periphery of the outer end of the adjusting rod, and a plurality of clamping grooves for inserting the clamping block are provided on the outer opening edge of the guide through hole along its own length direction.

[0020] By adopting the above technical scheme, due to the coordinated arrangement of the damping spring, the adjustment rod and the adjustment cover, the positions of the two slots correspond to the overlapping and misaligned states of the blocking through hole and the heat dissipation through hole respectively; when it is necessary to adjust the card block on the adjustment rod from one slot to another slot, the user pulls the adjustment cover away from the shell cover, so that the damping spring is compressed and the card block is disengaged from the corresponding slot, and then slides the adjustment cover along the length direction of the guide through hole, so that the card block overlaps with the other slot and is inserted into the inside of the slot, thereby realizing the adjustment and fixation of the sliding of the blocking plate.

[0021] Optionally, anti-slip grooves are arranged on the outer side surface of the adjustment cover, and clamping grooves are opened on the two opposite side surfaces of the adjustment cover.

[0022] By adopting the above technical solution, it is convenient for the user to hold and pull the adjustment cover.

[0023] Optionally, an abutment plate is fixedly provided on the side edge of the shell seat facing the shell cover, one side of the abutment plate can abut against the inner side surface of the shell cover, an elastic clip is provided on the side of the abutment plate, and a positioning groove for inserting the elastic clip is opened on the inner side surface of the shell cover.

[0024] By adopting the above technical solution, due to the matching setting of the abutment plate and the elastic clip, when the shell cover and the shell seat are assembled and fixed, the shell cover and the shell seat are aligned and abutted. At this time, the abutment plate abuts against the inner side surface of the shell cover, and the elastic clip on the abutment plate is inserted into the corresponding positioning groove.

[0025] Optionally, a guide slope is provided on a side edge of the abutment plate away from the housing seat.

[0026] By adopting the above technical solution, due to the setting of the guiding inclined surface, it is convenient for the abutting plate to abut against the inner side surface of the shell seat along the guiding inclined surface.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. Due to the coordinated setting of the positioning rod and the positioning slot, when the shell cover and the shell base are assembled and fixed, the shell cover and the shell base are aligned and abutted, and the positioning rod is inserted into the corresponding positioning slot, and the screw is used to penetrate the fixing through hole and then screwed into the corresponding fixing screw hole; the possibility of the shell cover and the shell base being misaligned again and needing to be realigned when the screws are tightened is reduced, thereby improving the assembly efficiency of the shell cover and the shell base.

[0029] 2. Due to the setting of the heat dissipation through-holes and the blocking through-holes, after the shell cover and the shell base are installed, the user can adjust the heat dissipation performance of the molded case circuit breaker according to the actual situation. When the environment is hot, the blocking through-holes and the heat dissipation through-holes can be adjusted to overlap to improve the heat dissipation performance; when the environment is humid, the blocking through-holes and the heat dissipation through-holes can be adjusted to misalignment.

[0030] 3. Due to the coordinated arrangement of the adjusting rod, the compression spring and the adjusting cover, the positions of the two slots correspond to the overlapping and misaligned states of the blocking through hole and the heat dissipation through hole respectively; when it is necessary to adjust the card block on the adjusting cover from one slot to another, the user pulls the adjusting cover away from the shell cover to compress the compression spring and dissipate the card block from the corresponding slot, and then slides the adjusting cover along the length direction of the guide through hole to make the card block overlap with the other slot and be inserted into the inside of the slot, thereby realizing the adjustment and fixation of the sliding of the blocking plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0033] Figure 2 This is a schematic diagram of the structure of the installation distribution of the shell cover and the shell base in the embodiment of the present application;

[0034] Figure 3 It is a schematic cross-sectional structure diagram of the installation and matching of the positioning rod and the positioning slot in the embodiment of the present application;

[0035] Figure 4 yes Figure 3 A magnified schematic diagram of part A;

[0036] Figure 5 It is a partial cross-sectional structural schematic diagram of the installation and coordination of the baffle plate in the embodiment of the present application;

[0037] Figure 6It is a partial structural diagram of the installation distribution of the adjustment cover and the adjustment rod in the embodiment of the present application;

[0038] Figure 7 is a schematic cross-sectional structural diagram of the embodiment of the present application embodying the installation and cooperation of the abutment plate;

[0039] Figure 8 yes Figure 7 Schematic diagram of the enlarged portion B.

[0040] In the figure, 1, shell seat; 11, fixing screw hole; 12, positioning slot; 13, abutment plate; 131, placement slot; 132, guiding slope; 14, elastic clamping piece; 141, compression spring; 142, arc-shaped protrusion; 2, shell cover; 21, fixing through hole; 22, positioning rod; 221, guiding slope; 23, limiting slider; 231, limiting slide groove; 24, heat dissipation through hole; 25, guiding through hole; 251, clamping slot; 26, positioning groove; 27, accommodating sink groove; 3, blocking plate; 31, blocking through hole; 4, adjusting piece; 41, damping spring; 42, adjusting rod; 421, clamping block; 43, adjusting cover; 431, anti-slip pattern; 432, clamping groove. DETAILED DESCRIPTION

[0041] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0042] Example:

[0043] Reference Figure 1 and Figure 2 A molded case circuit breaker comprises a shell base 1, an electrical component located in the shell base 1 and a shell cover 2 fixed on the shell base 1, the shell cover 2 is provided with four fixing through holes 21, and the shell base 1 is provided with fixing screw holes 11 that coincide with the fixing through holes 21; when the shell cover 2 and the shell base 1 are assembled and fixed, the shell cover 2 and the shell base 1 are aligned and abutted, and then screws are used to penetrate the fixing through holes 21 and then screwed into the corresponding fixing screw holes 11.

[0044] Reference Figure 3 and Figure 4 Four positioning rods 22 are arranged on the side of the shell cover 2 facing the shell base 1, and a positioning slot 12 for the positioning rods 22 to be inserted is provided on the shell base 1. A guiding slope 221 is arranged on the end edge of the positioning rod 22, and when the shell cover 2 and the shell cover 2 are aligned and abutted, the positioning rod 22 is convenient to be inserted into the corresponding positioning slot 12 along the guiding slope 221.

[0045] Reference Figure 4 and Figure 5On the inner walls on both sides of the opposite sides of the shell cover 2, blocking plates 3 connected with the positioning rods 22 are arranged, wherein two positioning rods 22 are fixed on each blocking plate 3; the blocking plate 3 is slidably arranged on the inner wall of the shell cover 2, and the shell cover 2 is provided with an adjusting member 4 for driving the blocking plate 3 to move toward the shell seat 1 and fix it; thereby, the depth of the positioning rod 22 inserted into the positioning slot 12 can be adjusted by the adjusting member 4.

[0046] Reference Figure 5 A limit slider 23 is relatively fixed on the inner wall of the shell cover 2, and a limit slot 231 for the edge of the blocking plate 3 to be placed is opened on the side surfaces where the two limit sliders 23 are close to each other, so as to realize the sliding limit of the blocking plate 3 and reduce the possibility of the blocking plate 3 being deflected during the sliding process.

[0047] Reference Figure 5 A plurality of heat dissipation holes 24 are provided on the side of the shell cover 2, and a blocking hole 31 corresponding to the heat dissipation hole 24 is provided on the blocking plate 3. When the adjusting member 4 drives the blocking plate 3 to slide, the blocking hole 31 can be driven to overlap or misalign with the heat dissipation hole 24; that is, the user can adjust the heat dissipation performance of the molded case circuit breaker according to actual conditions. When the environment is hot, the blocking hole 31 and the heat dissipation hole 24 can be adjusted to overlap.

[0048] Reference Figure 5 and Figure 6 The adjusting member 4 includes two damping springs 41 fixed on the blocking plate 3, wherein a receiving groove 27 for placing the damping spring 41 is provided on the inner wall of the shell cover 2, and a guide through hole 25 for inserting a part of the damping spring 41 is provided on the inner side of the receiving groove 27; wherein the vertical cross-sections of the receiving groove 27 and the guide through hole 25 are both waist-shaped, and the damping spring 41 can reciprocate along the length direction of the guide through hole 25 toward the shell seat 1;

[0049] At the same time, an adjustment rod 42 inserted into the guide through hole 25 is fixedly arranged on the side of the damping spring 41 away from the blocking plate 3, wherein an adjustment cover 43 is fixedly arranged on the end of the adjustment rod 42 extending to the outside of the shell cover 2, and a clamping block 421 is fixedly arranged on the outer periphery of the outer end of the adjustment rod 42, and two clamping grooves 251 for inserting the clamping block 421 are arranged on the outer opening edge of the guide through hole 25 along its own length direction;

[0050] When it is necessary to adjust the block 421 on the adjustment rod 42 from one slot 251 to another slot 251, the user pulls the adjustment cover 43 away from the shell cover 2 to compress the damping spring 41, thereby causing the block 421 to escape from the corresponding slot 251, and then slide the adjustment cover 43 along the length direction of the guide through hole 25 to cause the block 421 to overlap with the other slot 251 and be inserted into the inside of the slot 251.

[0051] Reference Figure 6 The outer side surface of the adjusting cover 43 is provided with anti-slip grooves 431 , and the two opposite side surfaces of the adjusting cover 43 are provided with clamping grooves 432 ; this arrangement makes it convenient for the user to hold and pull the adjusting cover 43 .

[0052] Reference Figure 7 A contact plate 13 is fixedly provided on the side edge of the shell base 1 facing the shell cover 2. After the shell cover 2 and the shell base 1 are installed, one side of the contact plate 13 can contact the inner side surface of the shell cover 2; a guide slope 132 is provided on the side edge of the contact plate 13 away from the shell base 1, so that the contact plate 13 can contact the inner side surface of the shell base 1 along the guide slope 132.

[0053] Reference Figure 7 and Figure 8 An elastic clip 14 is provided on the side where the abutting plate 13 abuts against the shell cover 2, wherein the elastic clip 14 includes a compression spring 141 and an arc-shaped protrusion 142, and the abutting plate 13 is provided with a placement groove 131 for the compression spring 141 and the arc-shaped protrusion 142 to be placed; the compression spring 141 presses the arc-shaped protrusion 142 so that a part of the arc-shaped protrusion 142 protrudes out of the placement groove 131, and the protruding part is an arc surface, and the arc length corresponding to the arc surface is a minor arc. At the same time, a positioning groove 26 is provided on the inner side surface of the shell cover 2 for the protruding part of the arc-shaped protrusion 142 to be inserted.

[0054] The implementation principle of the embodiment of the present application is:

[0055] When the shell cover 2 and the shell base 1 are assembled and fixed, the shell cover 2 and the shell base 1 are aligned and abutted, at which time the positioning rod 22 is inserted into the corresponding positioning slot 12 along the guide slope 221, the abutment plate 13 abuts against the inner side surface of the shell base 1 along the guide slope 132, and the elastic clamping member 14 on the abutment plate 13 is inserted into the corresponding positioning groove 26. Finally, a screw is used to penetrate the fixing through hole 21 and then screwed into the corresponding fixing screw hole 11.

[0056] After the shell cover 2 and the shell base 1 are installed, the user can adjust the heat dissipation performance of the molded case circuit breaker according to actual conditions. When the environment is hot, the blocking through hole 31 and the heat dissipation through hole 24 can be adjusted to overlap to improve the heat dissipation performance; when the environment is humid, the blocking through hole 31 and the heat dissipation through hole 24 can be adjusted to a misaligned state.

[0057] Unless otherwise defined, the terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The "first", "second", "third" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and other similar words do not indicate a quantitative limit, but indicate that there is at least one. "Including" or "comprising" and other similar words mean that the elements or objects appearing in front of "including" or "comprising" cover the elements or objects listed after "including" or "comprising" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0058] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A molded case circuit breaker, comprising a housing (1), an electrical component located in the housing (1), and a housing cover (2) fixedly mounted on the housing (1), wherein the housing cover (2) is provided with a plurality of fixing through holes (21), and the housing (1) is provided with fixing screw holes (11) that overlap with the fixing through holes (21); It is characterized in that A plurality of positioning rods (22) are arranged on the side of the shell cover (2) facing the shell seat (1), and a positioning slot (12) for inserting the positioning rods (22) is provided on the shell seat (1); a blocking plate (3) connected with the positioning rods (22) is arranged on the inner wall of the shell cover (2); the blocking plate (3) is slidably arranged on the inner wall of the shell cover (2), and an adjusting member (4) is provided on the shell cover (2) for driving the blocking plate (3) to move toward the shell seat (1) and fix it; A plurality of heat dissipation holes (24) are provided on the side of the shell cover (2); a blocking hole (31) corresponding to the heat dissipation hole (24) is provided on the blocking plate (3); the adjusting member (4) can drive the blocking hole (31) to overlap or misalign with the heat dissipation hole (24); the adjusting member (4) comprises a damping spring (41) fixed on the blocking plate (3); a receiving groove (27) for the damping spring (41) to be placed is provided on the inner wall of the shell cover (2); a guide hole (25) with a waist-shaped cross section and for a portion of the damping spring (41) to be inserted is provided on the inner side of the receiving groove (27); The damping spring (41) can reciprocate along the length direction of the guide through hole (25) toward the direction approaching the shell seat (1); an adjustment rod (42) is fixedly provided on the side of the damping spring (41) away from the blocking plate (3) and inserted into the inside of the guide through hole (25); an adjustment cover (43) is fixedly provided on the end of the adjustment rod (42) extending to the outside of the shell cover (2); a clamping block (421) is fixedly provided on the outer periphery of the outer end of the adjustment rod (42); and a plurality of clamping grooves (251) for inserting the clamping blocks (421) are opened on the outer opening edge of the guide through hole (25) along its own length direction.

2. A molded case circuit breaker according to claim 1, characterized in that: A guiding inclined surface (221) is provided on the end edge of the positioning rod (22).

3. A molded case circuit breaker according to claim 1, characterized in that: Limiting slide blocks (23) are relatively fixedly arranged on the inner wall of the shell cover (2), and limiting sliding grooves (231) for the edges of the blocking plates (3) to be placed are provided on the sides of the two limiting slide blocks (23) that are close to each other.

4. A molded case circuit breaker according to claim 1, characterized in that: The outer side surface of the adjusting cover (43) is provided with anti-slip grooves (431), and the two opposite side surfaces of the adjusting cover (43) are provided with clamping grooves (432).

5. The molded case circuit breaker according to claim 1, characterized in that: An abutment plate (13) is fixedly provided on the side edge of the shell seat (1) facing the shell cover (2), one side of the abutment plate (13) can abut against the inner side surface of the shell cover (2), an elastic clamping piece (14) is provided on the side surface of the abutment plate (13), and a positioning groove (26) for inserting the elastic clamping piece (14) is provided on the inner side surface of the shell cover (2).

6. A molded case circuit breaker according to claim 5, characterized in that: A guide slope (132) is provided on the side edge of the abutment plate (13) away from the housing seat (1).

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