An operating mechanism and circuit breaker

Abstract

The application provides an operating mechanism and a circuit breaker, and relates to the technical field of electrical equipment. The operating mechanism comprises a base, an insulating piece and an operating mechanism. The base is provided with a first mounting cavity and a plurality of second mounting cavities, and is provided with two partition walls. The first mounting cavity and the plurality of second mounting cavities are arranged in sequence and are all used for mounting a contact mechanism. The first mounting cavity is located between any two adjacent second mounting cavities. The insulating piece is detachably arranged in the first mounting cavity. The insulating piece comprises two insulating walls which are respectively detachably arranged on the top of the two partition walls. The two insulating walls are respectively located between the first mounting cavity and the two adjacent second mounting cavities. The operating mechanism is arranged between the two insulating walls and on the top of the partition wall. In this way, the insulation capacity of the operating mechanism is substantially improved without sacrificing the compression of the phase distance, so as to ensure the electrical isolation performance of the small-sized circuit breaker and effectively improve the reliability and service life of the circuit breaker.

Description

Technical Field

[0001] This invention relates to the field of electrical equipment technology, and more specifically, to an operating mechanism and a circuit breaker. Background Technology

[0002] With the increasing demands for miniaturization and high integration in power systems, the circuit breaker industry is continuously developing towards smaller size and more compact designs. To adapt to this trend, the thickness of the insulation spacers between phases inside circuit breakers is constantly being reduced to minimize the interphase distance, thereby meeting the requirement for overall size reduction.

[0003] See Figure 7 In existing technology, the insulating partition walls between each phase inside the circuit breaker have upward-facing notches. The contact shaft is mounted in the notch, and corresponding insulating components are inserted into each notch to seal it, creating a space between the insulating components and the notch for the contact shaft to rotate. The left and right side plates of the operating mechanism are located on the inner sides of two adjacent insulating components. The left and right side plates of the operating mechanism are provided with threaded mounting holes, and the left and right side plates of the operating mechanism are fastened to the bottom wall of the base mounting cavity through the threaded mounting holes.

[0004] However, in the existing technology, the wall thickness of the insulation spacer is too thin. During the part forming and subsequent mechanical assembly and separation process, it is very easy to generate micro-cracks, deformation or even penetrating rupture due to residual stress concentration or external impact. This leads to a significant decrease in the phase-to-phase insulation performance, which directly affects the product yield and long-term reliability. Summary of the Invention

[0005] This invention provides an operating mechanism and a circuit breaker that can substantially improve the insulation capability of the operating mechanism without sacrificing phase-to-phase distance compression, thereby ensuring the electrical isolation performance of the miniaturized circuit breaker and effectively improving the reliability and service life of the circuit breaker.

[0006] The embodiments of the present invention can be implemented as follows: In a first aspect, the present invention provides an operating mechanism, comprising: The base has a first mounting cavity and a plurality of second mounting cavities, which are arranged sequentially and are all used to mount the contact mechanism. The first mounting cavity is located between any two adjacent second mounting cavities. The base has two partition walls protruding from its bottom wall corresponding to the first mounting cavity. An insulating component, comprising two insulating walls, each of which is detachably disposed on the top of a partition wall, and the two partition walls and the two insulating walls together form the first mounting cavity; A mechanism assembly disposed between the two insulating walls, with the side plate of the mechanism assembly located above or above the partition wall.

[0007] In an optional embodiment, the partition wall is provided with two first mounting portions, and the insulating wall is provided with a second mounting portion. The second mounting portions of the two insulating walls are detachably inserted into the two first mounting portions to jointly form the first mounting cavity.

[0008] In an optional embodiment, the insulating wall is provided with a protrusion, and the first mounting portion is provided with a protruding edge corresponding to the second mounting portion; The two side plates of the mechanism assembly are respectively pressed against the protrusions of the two insulating walls so that the second mounting portion abuts against the protruding edge.

[0009] In an optional embodiment, the base is provided with multiple isolation plates, which divide the internal cavity of the base into multiple arc-extinguishing cavities. The multiple arc-extinguishing cavities are connected to the first mounting cavity and the multiple second mounting cavities in a one-to-one correspondence. The two partition walls correspond to two of the isolation plates respectively.

[0010] In an optional embodiment, two adjacent isolation plates are provided with a third mounting portion, and the insulating wall is provided with a fourth mounting portion, wherein the fourth mounting portions of the two insulating walls are detachably inserted into the two third mounting portions respectively.

[0011] In an optional embodiment, the length of the insulating element / the length of the partition wall is greater than 0.8.

[0012] In an optional embodiment, on a projection plane perpendicular to the width direction, the ratio of the projected area of ​​the insulating element to the projected area of ​​the partition wall is greater than 1.

[0013] In an optional embodiment, the operating mechanism further includes a fastener, the mechanism component is provided with a second mounting hole, the partition wall is provided with a through hole, the through hole is provided at the top of the partition wall; the fastener passes through the through hole and is fixedly engaged with the second mounting hole, so that the mechanism component is fixed on the partition wall of the base.

[0014] In an optional embodiment, a rear partition is provided on each of the two insulating members on opposite sides, and the rear partition corresponds to the bottom of the two side plates of the mechanism assembly. And / or, each of the two insulating members has a front partition on its opposite side, the front partition corresponding to the bottom of the two side plates of the mechanism assembly.

[0015] In a second aspect, the present invention provides a circuit breaker including an operating mechanism as described in any of the foregoing embodiments.

[0016] The beneficial effects of the operating mechanism and circuit breaker provided in this invention include: by placing the insulating component entirely within the first mounting cavity, with two insulating walls positioned between two adjacent second mounting cavities and the first mounting cavity, precisely corresponding to the phase-to-phase isolation positions originally borne by the thin wall of the base, the mechanism components are constrained between these two insulating walls, thus forming an independently operating space that is physically enclosed and electrically isolated. Since the insulating component is no longer attached to the thin wall structure of the base, its thickness can be independently designed according to the requirements of insulation strength and mechanical stiffness, without needing to accommodate the base demolding process or overall size limitations. Simultaneously, its material, wall thickness, and rib layout can be optimized and structurally reinforced for actual working conditions such as impact resistance. In this way, the responsibility for phase-to-phase insulation is transferred from the originally fragile thin wall of the base to an independently insulating component with a complete structure, controllable thickness, and controlled assembly, avoiding the easy failure of the thin wall of the base during manufacturing and operation, and ensuring that a stable and reliable electrical isolation boundary is always maintained between the mechanism components and each phase contact system. Therefore, without sacrificing the phase-to-phase distance compression, the insulation capability of the operating mechanism can be substantially improved, thereby ensuring the electrical isolation performance of the miniaturized circuit breaker and effectively improving the reliability and service life of the circuit breaker. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the operating mechanism structure provided in an embodiment of the present invention; Figure 2 An exploded view of the operating mechanism provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the base and insulating component structure provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the insulating component structure provided in an embodiment of the present invention; Figure 5 This is one of the assembly diagrams of the side plate and the insulating component provided in an embodiment of the present invention; Figure 6 This is a second schematic diagram of the assembly of the side plate and the insulating component provided in an embodiment of the present invention; Figure 7 This is a background diagram of the present invention.

[0019] Icons: 10-Operating mechanism; 100-Base; 101-Separation wall; 102-Through hole; 110-First mounting cavity; 120-Second mounting cavity; 130-First mounting part; 131-First notch; 132-Raised edge; 140-Isolation plate; 141-Third mounting part; 150-Arc extinguishing cavity; 200-Insulating component; 210-Insulating wall; 211-Second notch; 220-Second mounting part; 230-Fourth mounting part; 240-Connecting beam; 250-Protrusion; 260-Rear partition; 270-Front partition; 300-Mechanism assembly; 310-Second mounting hole; 320-Contact shaft; 400-Fastener. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0022] 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.

[0023] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0024] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0025] It should be noted that, where there is no conflict, the features in the embodiments of the present invention can be combined with each other.

[0026] With the increasing demands for miniaturization and high integration in power systems, the circuit breaker industry is continuously developing towards smaller size and more compact designs. To adapt to this trend, the thickness of the insulation spacers between phases inside circuit breakers is constantly being reduced to minimize the interphase distance, thereby meeting the requirement for overall size reduction.

[0027] However, in the existing technology, the wall thickness of the insulation board is too thin. During the injection molding, cooling and shrinkage and subsequent mechanical assembly of the parts, it is very easy to generate micro-cracks, deformation or even through-breaks due to residual stress concentration or external impact. This leads to a significant decrease in the phase-to-phase insulation performance, which directly affects the product yield and long-term reliability.

[0028] Please see Figures 1 to 6 This invention provides an operating mechanism 10, which includes a base 100, an insulating component 200, and a mechanism assembly 300.

[0029] The base 100 includes a first mounting cavity 110 and multiple second mounting cavities 120, arranged sequentially and all used for mounting contact mechanisms. The first mounting cavity 110 is located between any two adjacent second mounting cavities 120. Partition walls 101 protrude from both sides of the bottom wall of the first mounting cavity 110 of the base 100, and the mechanism assembly 300 is disposed between two partition walls 101. An insulating member 200 is detachably disposed on the side of the partition wall 101 away from the bottom surface of the base. The insulating member 200 includes two insulating walls 210, each detachably disposed on the top of one of the two partition walls 101, and located between two adjacent second mounting cavities 120 and the first mounting cavity 110. The mechanism assembly 300 is disposed between the two insulating walls 210. The two partition walls 101 and the two insulating walls 210 together form the first mounting cavity 110.

[0030] It is worth mentioning that the mechanism component 300 is located above or above the partition wall 101. This means that the partition wall 101 includes an upper section and a lower section, with the upper section corresponding to the upper part of the partition wall 101. Specifically, in the width direction (i.e., the left-right direction, such as...) Figure 2 The X direction shown is the length direction, i.e., the front-to-back direction. Figure 2 As shown, the Y-direction, the height direction, i.e., the up and down direction, is as follows. Figure 2 On the projection plane perpendicular to the Z direction (as shown), the projection of the side plate of the operating mechanism partially overlaps with the projection of the partition wall 101, and the overlapping part is located above the partition wall 101. Alternatively, the projection of the side plate of the operating mechanism does not overlap with the projection of the partition wall 101, that is, the projection of the side plate of the operating mechanism 10 is located above the projection of the partition wall 101. It can be understood that its side plate can contact the partition wall 101 or be spaced apart.

[0031] When the projection of the side plate of the operating mechanism 10 partially overlaps with the projection of the partition wall 101, and the overlapping part is located above the partition wall 101, the upper part of the partition wall 101 will become thinner, but it will not have a significant impact on the overall strength of the partition wall 101. Preferably, the projection of the side plate of the operating mechanism is located above the projection of the partition wall 101.

[0032] It can be understood that the two side plates of the operating mechanism are the mounting structures that contact and connect the operating mechanism with the base or insulating parts, with the two side plates located on the left and right sides of the operating mechanism respectively.

[0033] As can be seen, by placing the insulating component 200 entirely within the first mounting cavity 110, and with two insulating walls 210 positioned between the two adjacent second mounting cavities 120 and the first mounting cavity 110, the left and right sides, which were originally isolated by the thin wall of the base 100, are precisely aligned. The mechanism assembly 300 is then constrained between these two insulating walls 210, thereby forming a physically enclosed and electrically isolated independent working space.

[0034] Since the insulating component 200 is no longer attached to the thin-walled structure of the base 100, its own thickness can be independently designed according to the requirements of insulation strength and mechanical stiffness, without having to accommodate the demolding process or overall size limitations of the base 100. At the same time, its material, wall thickness, and rib layout can be optimized and structurally strengthened for actual working conditions such as impact resistance. In this way, the responsibility for interphase insulation is transferred from the originally fragile thin-walled base 100 to the independent insulating component 200, which has a complete structure, controllable thickness, and controlled assembly. This not only avoids the easy failure of the thin-walled base 100 during the manufacturing and operation cycle, but also ensures that the mechanical component 300 and each phase contact system always maintain a stable and reliable electrical isolation boundary.

[0035] Therefore, without sacrificing the phase-to-phase distance compression, the insulation capability of the operating mechanism 10 can be substantially improved, thereby ensuring the electrical isolation performance of the miniaturized circuit breaker and effectively improving the reliability and service life of the circuit breaker.

[0036] Furthermore, the partition wall 101 is provided with two first mounting portions 130, and the insulating wall 210 is provided with a second mounting portion 220. The second mounting portions 220 of the two insulating walls 210 are detachably inserted into the two first mounting portions 130 to jointly form a first mounting cavity 110. The first mounting portion 130 has a protruding edge 132 corresponding to the second mounting portion 220. After the second mounting portion 220 is inserted into the two first mounting portions 130, it abuts against the protruding edge 132.

[0037] During assembly, the operator aligns the insulating component 200 with the first mounting cavity 110 and presses it down. The second mounting portions 220 of the two insulating walls 210 slide in and fit onto the two first mounting portions 130. At this time, the first mounting portions 130 are inserted into the second mounting portions 220, which not only restricts the horizontal displacement and forward and backward movement of the insulating wall 210, but also bears the downward reaction force and vibration load generated when the mechanism component 300 is working through surface contact, thereby improving the installation stability of the insulating component 200.

[0038] Furthermore, the top of the partition wall 101 is provided with a first notch 131, and the bottom of the insulating wall 210 is provided with a second notch 211. The first notch 131 and the second notch 211 together form a first mounting hole, which is used for the contact shaft 320 of the contact mechanism to pass through.

[0039] In detail, when the second mounting portion 220 of the insulating wall 210 is inserted into the first mounting portion 130, the first notch 131 and the second notch 211 are precisely aligned in space and their edges are connected, together forming a complete hole-like structure, namely the first mounting hole.

[0040] Therefore, the contact shaft can be mounted on the first notch 131 and connected to the drive component inside the mechanism assembly 300, and cooperate with the insulating wall 210. In this way, while enabling the mechanism assembly 300 to drive multiple contact mechanisms to open and close synchronously, the electrical insulation performance between each phase can also be guaranteed.

[0041] Furthermore, on the projection plane perpendicular to the width direction, the side plate of the operating mechanism is located above or above the first notch 131 of the partition wall 101.

[0042] Furthermore, the base 100 is provided with multiple isolation plates 140, which divide the internal cavity of the base 100 into multiple arc-extinguishing cavities 150. The multiple arc-extinguishing cavities 150 are connected to the first mounting cavity 110 and the multiple second mounting cavities 120 in a one-to-one correspondence. The two partition walls 101 correspond to two of the isolation plates respectively.

[0043] In other words, each of the second mounting cavity 120 and the first mounting cavity 110 where the contact mechanism is located, as well as the intermediate first mounting cavity 110 where the operating mechanism 10 is located, each has a dedicated arc extinguishing cavity 150 behind it, providing a physical channel for directional ignition and longitudinal elongation of the electric arc.

[0044] Based on this, the two partition walls 101 protruding from the bottom wall of the base 100 are not randomly arranged at any position on the bottom wall, but are precisely corresponding to the two partition plates 140.

[0045] Specifically, the front end of each partition wall 101 is directly connected to the rear edge of the corresponding isolation plate 140, or at least completely overlaps with it in the length projection direction. Therefore, the partition wall 101 is not only the assembly fulcrum of the insulating wall 210, but also a structural continuation of the rearward extension of the isolation plate 140. When the insulating wall 210 is inserted into the first mounting part 130 through the second mounting part 220, its bottom actually closely adheres to and partially covers the upper region of the corresponding partition wall 101, thereby forming a continuous and complete barrier in the length and height directions at the junction of the arc extinguishing cavity 150 and the first mounting cavity 110, which is composed of the isolation plate 140, the partition wall 101, and the insulating wall 210.

[0046] The insulating partition wall includes a portion corresponding to the arc-extinguishing cavity 150, namely the isolation plate 140, and a portion corresponding to the operating mechanism. The portion corresponding to the operating mechanism consists of an upper part, namely the insulating member 200, and a lower part, namely the partition wall 101. The first mounting portion 130 is located above the rear end of the partition wall 101. The insulating member 200 must have sufficient length and area to replace the upper part of the insulating partition wall corresponding to the operating mechanism in the prior art to ensure the strength of the partition wall 101. Therefore, the length of the insulating member 200 / the length of the partition wall 101 is greater than 0.8. Furthermore, on the projection plane perpendicular to the width direction, the projected area of ​​the insulating member 200 / the projected area of ​​the partition wall 101 is greater than 1.

[0047] In detail, two adjacent isolation plates 140 are provided with a third mounting part 141, and an insulating wall 210 is provided with a fourth mounting part 230. The fourth mounting parts 230 of the two insulating walls 210 are detachably inserted into the two third mounting parts 141 respectively.

[0048] When the operator presses the insulating component 200 into the first mounting cavity 110 along the height direction, the fourth mounting portions 230 of the two insulating walls 210 are aligned with the two third mounting portions 141 respectively, and the insertion action is completed under continuous downward pressure. At this time, a surface contact or line contact is formed between the fourth mounting portion 230 and the third mounting portion 141, which not only restricts the swaying of the insulating wall 210 in the left and right directions, but also constrains its slight torsion around the vertical axis, so that the spatial posture of the two insulating walls 210 in the first mounting cavity 110 achieves a higher order of positioning accuracy.

[0049] Furthermore, the insulating element 200 also includes at least one connecting beam 240, the two ends of which are respectively connected to two insulating walls 210.

[0050] It is understood that the connecting beam 240 typically spans horizontally between the two insulating walls 210, located near the top or middle of both, with its axis perpendicular to the plane containing the insulating walls 210.

[0051] The connection between the connecting beam 240 and the two insulating walls 210 can be an integral structure formed by injection molding; of course, in other embodiments, it can also be a rigid connection formed by welding or snap locking. In any case, it is ensured that there is no relative sliding or rotational freedom between the connecting beam 240 and the insulating wall 210.

[0052] It is worth mentioning that the connecting beam 240 is located between the mechanism component 300 and the base 100, and above the partition wall 101.

[0053] The insulating wall 210 is provided with a plurality of protrusions 250. When the mechanism assembly 300 is fastened to the base 100, the left and right side plates of the mechanism assembly 300 press against the protrusions 250, so that the second mounting part 220 abuts against the protruding edge 132.

[0054] The insulating component 200 has a rear partition 260 at the rear bottom position of the left and right side plates of the mechanism assembly 300. The rear partition 260 is located on the two inner sides of the left and right side plates, that is, the insulating component 200 is fitted into the rear bottom position of the left and right side plates to ensure insulation isolation between the mechanism side plates and the flexible connection, and to avoid phase-to-phase short circuit. The left and right side plates of the mechanism assembly 300 have a front partition 270 at the front bottom position of the left and right side plates. The front partition 270 is located on the two inner sides of the left and right side plates, that is, the insulating component 200 is fitted into the front bottom position of the left and right side plates to ensure insulation isolation between the side plates of the mechanism assembly and the moving contact.

[0055] Furthermore, the operating mechanism 10 also includes a fastener 400, and the mechanism assembly 300 is provided with a second mounting hole 310, which is a threaded hole. The partition wall 101 is provided with a through hole 102, which opens on the upper surface of the partition wall 101. The fastener 400 passes through the through hole 102 on the base 100 and is fixedly engaged with the second mounting hole 310.

[0056] During installation, the mechanism assembly 300 and the insulating component 200 are assembled and inserted into the partition wall 101. Then, the mechanism assembly 300 is fixed to the partition wall 101 of the base 100 using fasteners 400. After fixing, there is a gap between the bottom surface of 310 and the top surface of the partition wall 101. During tightening, the left and right side plates of the mechanism assembly 300 press against the protrusion 250, causing the second mounting part 220 to abut against the protruding edge 132. Therefore, in the assembled state, the mechanism assembly 300 can firmly press the insulating component 200 onto the base 100, thus eliminating the need for other parts to fix the insulating component 200, thereby reducing the number of parts.

[0057] In this embodiment, the fastener 400 can be a screw or rivet, which passes through the second mounting hole 310 from top to bottom and is screwed or pressed into the pre-set threaded hole or riveting structure of the base 100. This ensures that the axis of the fastener 400 is basically perpendicular to the base 100, so that the locking force can be effectively converted into downward pressure and anti-rotation constraint force on the entire mechanism assembly 300, further improving the installation stability of the base 100, the insulating part 200 and the mechanism assembly 300.

[0058] In the prior art, the second mounting holes 310 of the left and right side plates of the mechanism assembly 300 abut against the bottom surface of the base 100. Therefore, the left and right side plates of the mechanism assembly 300 are located on the inner sides of the two insulating spacers corresponding to the operating mechanism, i.e., in the projection along the width direction, the side plates of the operating mechanism extend to the lower part of the insulating spacers. As the thickness of the insulating spacers between the phases inside the circuit breaker is continuously compressed, the distance between the outer sides of the two insulating spacers continuously decreases. When the distance between the outer sides of the left and right side plates of the mechanism assembly 300 remains unchanged, the thickness of the insulating spacers becomes too thin.

[0059] In this embodiment, the insulating partition wall corresponding to the mechanism is divided into upper and lower parts. Projected along the width direction, the side plate of the operating mechanism is located in the lower half, i.e., the upper part or above the partition wall 101. This allows the thickness of the partition wall 101 to be unaffected by the side plate of the mechanism, resulting in a thicker wall. When the base material is thermosetting plastic, the thicker wall allows the partition wall 101 to have higher molding quality.

[0060] The insulating component 200 forms the upper part. The insulating component 200 has a relatively thin wall thickness and is preferably made of thermoplastic material. The thinner wall thickness also results in better molding quality. Moreover, when the mechanism assembly 300 is fastened to the base 100, the left and right side plates of the mechanism assembly 300 press against the protrusion 250. Since the thermoplastic material has good toughness, the protrusion 250 will not break and has good impact resistance when broken.

[0061] In summary, this embodiment of the invention provides an operating mechanism 10. By integrally placing the insulating component 200 within the first mounting cavity 110, and with two insulating walls 210 located between two adjacent second mounting cavities 120 and the first mounting cavity 110, the mechanism precisely corresponds to the left and right sides of the originally isolated position borne by the thin wall of the base 100. The mechanism component 300 is constrained between these two insulating walls 210, thereby forming a physically enclosed and electrically isolated independent working space. Since the insulating component 200 is no longer attached to the thin wall structure of the base 100, its own thickness can be independently designed according to the requirements of insulation strength and mechanical rigidity, without having to accommodate the demolding process or overall size limitations of the base 100. At the same time, its material, wall thickness, and rib layout can be optimized and structurally strengthened for actual working conditions such as impact resistance. In this way, the responsibility for phase-to-phase insulation is transferred from the originally fragile thin wall of the base 100 to the independent insulating component 200, which has a complete structure, controllable thickness, and controlled assembly. This not only avoids the easy failure of the thin wall of the base 100 during the manufacturing and operation cycle, but also ensures that the mechanical component 300 and each phase contact system always maintain a stable and reliable electrical isolation boundary.

[0062] Furthermore, embodiments of the present invention also provide a circuit breaker, which includes an operating mechanism 10 as described in the above embodiments.

[0063] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An operating mechanism (10), characterized in that, include: A base (100) is provided with a first mounting cavity (110) and a plurality of second mounting cavities (120). The first mounting cavity (110) and the plurality of second mounting cavities (120) are arranged sequentially and are all used to mount the contact mechanism. The first mounting cavity (110) is located between any two adjacent second mounting cavities (120). The base (100) has two partition walls (101) protruding from its bottom wall corresponding to the first mounting cavity (110). An insulating component (200) includes two insulating walls (210), which are detachably disposed on the top of two partition walls (101), and the two partition walls (101) and the two insulating walls (210) together form the first mounting cavity (110). A mechanism assembly (300) is disposed between the two insulating walls (210), and the side plate of the mechanism assembly (300) is located above or above the partition wall (101).

2. The operating mechanism (10) according to claim 1, characterized in that, The partition wall (101) is provided with two first mounting parts (130), and the insulating wall (210) is provided with a second mounting part (220). The second mounting parts (220) of the two insulating walls (210) are respectively detachably inserted into the two first mounting parts (130) to jointly form the first mounting cavity (110).

3. The operating mechanism (10) according to claim 2, characterized in that, The insulating wall (210) is provided with a protrusion (250), and the first mounting part (130) is provided with a protruding edge (132) corresponding to the second mounting part (220). The two side plates of the mechanism assembly (300) are pressed against the protrusions (250) of the two insulating walls, so that the second mounting part (220) abuts against the protrusion (132).

4. The operating mechanism (10) according to claim 2, characterized in that, The base (100) is provided with a plurality of isolation plates (140), which divide the internal cavity of the base (100) into a plurality of arc-extinguishing cavities (150). The plurality of arc-extinguishing cavities (150) are connected to the first mounting cavity (110) and the plurality of second mounting cavities (120) in a one-to-one correspondence. The two partition walls (101) correspond to two of the isolation plates (140) respectively.

5. The operating mechanism (10) according to claim 4, characterized in that, Two adjacent isolation plates (140) are provided with a third mounting part (141), and the insulating wall (210) is provided with a fourth mounting part (230). The fourth mounting parts (230) of the two insulating walls (210) are respectively detachably inserted into the two third mounting parts (141).

6. The operating mechanism (10) according to claim 1, characterized in that, The length of the insulating element (200) / the length of the partition wall (101) is greater than 0.

8.

7. The operating mechanism (10) according to claim 6, characterized in that, On a projection plane perpendicular to the width direction, the projected area of ​​the insulating element (200) / the projected area of ​​the partition wall (101) is greater than 1.

8. The operating mechanism (10) according to claim 1, characterized in that, The operating mechanism (10) further includes a fastener (400), the mechanism component (300) is provided with a second mounting hole (310), the partition wall (101) is provided with a through hole (102), the through hole (102) is provided at the top of the partition wall (101); the fastener (400) passes through the through hole (102) and is fixedly engaged with the second mounting hole (310) so that the mechanism component (300) is fixed on the partition wall (101) of the base (100).

9. The operating mechanism (10) according to claim 1, characterized in that, Each of the two insulating components (200) has a rear partition (260) on one side opposite to the other, and the rear partition (260) corresponds to the bottom of the two side plates of the mechanism assembly (300); And / or, each of the two insulating elements (200) is provided with a front partition (270) on an opposite side, the front partition (270) corresponding to the bottom of the two side plates of the mechanism assembly (300).

10. A circuit breaker, characterized in that, Includes the operating mechanism (10) as described in any one of claims 1-9.

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