Opening mechanism of thin circuit breaker

Abstract

The utility model relates to an opening mechanism of a thin circuit breaker, the thin circuit breaker comprises a panel, a bottom plate, an opening crank arm and a transmission plate, the opening mechanism is fixedly arranged on a fixed column between the bottom plate and the panel, the fixed column is rotatably sleeved with an opening pawl linked with the transmission plate, a rotating groove is arranged in the opening pawl, and the rotating groove is provided with a rotating shaft. A driving block is rotatably installed in the rotating groove, the fixing column is sleeved with an elastic piece, one end of the elastic piece extends into the driving block to enable the driving block to extend out of the rotating groove to be in linkage with the transmission plate, and the other end of the elastic piece is fixed to the panel. According to the utility model, the elastic member is used to replace a protruding block, a spring and other parts on an original brake separating pawl, thereby greatly simplifying the structure of the brake separating pawl, being more convenient to produce, manufacture and process, and reducing the production and manufacturing cost.

Description

Technical Field

[0001] The utility model relates to a tripping mechanism of a thin circuit breaker, belonging to the field of electric power components. Background Art

[0002] A high-voltage circuit breaker refers to a mechanical switching device that can break, close and carry the normal current of an operating line, and can also carry, break and close abnormal current within a specified time. It is the most important control and protection equipment in the power system. At present, the thickness dimension of the spring operating mechanism of the circuit breaker is large, and it cannot meet the technical requirements of the normally pressurized sealed gas-insulated ring main unit.

[0003] This application is an improvement based on the utility model with the publication number of CN220543800U.

[0004] In the traditional circuit breaker, two non-concentric structures are usually set on the tripping mechanism. For example, the Chinese invention with the publication number of CN103337386B discloses a large-output-angle spring operating mechanism. The tripping mechanism includes a tripping half shaft (8), a tripping pawl (9) and a tripping spring (10). The tripping half shaft (8) is linked with a link mechanism (7) through the tripping pawl (9). One end of the tripping spring (10) is fixed, and the other end is arranged on the crank arm (11) of the output main shaft. The link mechanism (7) includes a first link (71) and a second link (72). The first link (71) is provided with a first crank arm (711) cooperating with a cam (61), a second crank arm (712) connected with the second link (72) and a third crank arm (713) cooperating with the tripping pawl (9). The second link (72) is connected with the output main shaft (2). The length of the second crank arm (712) is longer than the lengths of the first crank arm (711) and the third crank arm (713). The link mechanism (7) is arranged below the tripping pawl (9). The tripping half shaft (8) is provided with a tripping knob (15). The tripping knob (15) is detachably connected with the tripping half shaft (8). The tripping half shaft (8) is provided with a pin (82). The tripping knob (15) is provided with a chute (151) rotatably cooperating with the pin (82) in the circumferential direction. The tripping pawl (9) is provided with a convex block (91). A groove (81) for accommodating the convex block (91) is formed by inward depression on the tripping half shaft (8). The tripping pawl (9) is provided with a transmission block (92). The transmission block (92) abuts against the tripping pawl (9). In this patent, the tripping pawl and the transmission block are arranged non-concentrically, which is difficult in production and processing, and there are many components, and problems such as misassembly, omission and error are likely to occur during assembly, which is not conducive to improving production efficiency. Content of the Utility Model

[0005] The purpose of the utility model is to provide a tripping mechanism of a thin circuit breaker in order to overcome the defects and deficiencies existing in the prior art.

[0006] A tripping mechanism for a thin circuit breaker, the thin circuit breaker includes a panel, a bottom plate, a tripping toggle arm and a transmission plate. The tripping mechanism is fixedly arranged on a fixed column between the bottom plate and the panel. A tripping pawl linked with the transmission plate is rotatably sleeved on the fixed column. A rotating groove is arranged in the tripping pawl, and a driving block is rotatably installed in the rotating groove. An elastic member is sleeved on the fixed column. One end of the elastic member extends into the driving block to make the driving block extend out of the rotating groove and link with the transmission plate, and the other end is fixed on the panel. By improving the structural arrangement of the tripping mechanism and using an elastic member to replace components such as the convex block and spring on the original tripping pawl, the structure of the tripping pawl is greatly simplified, production, manufacturing and processing are more convenient, and the production and manufacturing costs are reduced.

[0007] Further, the outer arc of the driving block and the rotation center of the tripping pawl are concentrically arranged. Setting the outer arc of the driving block and the rotation center of the tripping pawl to be concentric simplifies the processing cost, stabilizes the tripping release force of the tripping, simplifies the design difficulty and improves the production and installation efficiency.

[0008] Preferably, a plugging groove is arranged on the driving block, and a plugging hole communicated with the rotating groove is arranged on the tripping pawl. One end of the elastic member extends into the plugging groove through the plugging hole and elastically engages with the driving block. The elastic force of the elastic member can keep the driving block in the state of extending out of the rotating groove all the time, which is convenient for quick resetting and maintaining during closing.

[0009] Further, a fixing pin is arranged in the rotating groove, and the driving block is rotatably installed in the rotating groove through the fixing pin.

[0010] Further, a fixing hole is arranged on the panel, and the end of the elastic member is in a hook shape and is hooked and fixed with the fixing hole. The fixing hole has a space that enables the elastic member to rotate. Driven by the transmission plate, the driving block will drive the elastic member to rotate together, and the fixing hole plays a limiting role.

[0011] Further, the elastic member is a spring or a torsion spring. The material of the elastic member is easy to obtain and has a low cost, further reducing the production and manufacturing costs.

[0012] Preferably, a groove is arranged on the tripping toggle arm, and the tripping function is realized by the rotation action of the tripping toggle arm to make the groove abut against the end of the tripping pawl.

[0013] Preferably, a limiting column is arranged between the panel and the bottom plate, and a limiting groove is arranged at the end of the tripping pawl. The limiting column abuts against the limiting groove in the closing state. The limiting column is used to limit the rotation angle of the tripping pawl to prevent its rotation angle from being too large and affecting the movement track of the transmission plate.

[0014] The beneficial effects of the present utility model are as follows: By improving the structural arrangement of the opening mechanism and using elastic components to replace components such as the convex block and spring on the original opening pawl, the structure of the opening pawl is greatly simplified, making production, manufacturing, and processing more convenient and reducing the production and manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following-described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, obtaining other drawings based on these drawings still belongs to the scope of the present utility model.

[0016] Figure 1 is a schematic diagram of the main structure of the present utility model;

[0017] Figure 2 is a schematic diagram of the structure with the panel removed;

[0018] Figure 3 is Figure 2 a schematic diagram of the structure from another angle in

[0019] In the figure, 1. Panel; 11. Fixed hole; 12. Limit post; 2. Base plate; 3. Opening toggle arm; 31. Groove; 4. Transmission plate; 41. Fixed post; 42. Elastic component; 5. Opening pawl; 51. Rotation groove; 52. Insertion hole; 53. Fixed pin; 54. Driving block; 541. Insertion slot; 55. Limit slot. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] To make the objectives, technical solutions, and advantages of the present utility model clearer, the following will further describe the present utility model in detail with reference to the drawings.

[0021] It should be noted that all the expressions using "first" and "second" in the embodiments of the present utility model are used to distinguish two entities or parameters with the same name but different identities. It can be seen that "first" and "second" are only for the convenience of expression and should not be construed as a limitation on the embodiments of the present utility model. This will not be elaborated further in the subsequent embodiments.

[0022] The terms of direction and position mentioned in the present utility model, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "top", "bottom", "side", etc., are only references to the directions or positions in the drawings. Therefore, the terms of direction and position used are for the purpose of explaining and understanding the present utility model, rather than a limitation on the protection scope of the present utility model.

[0023] Such as Figures 1-3As shown in the figure, this is an embodiment of the opening mechanism of a thin-type circuit breaker of the present utility model. The thin-type circuit breaker includes a panel 1, a bottom plate 2, an opening toggle arm 3, and a transmission plate 4. The opening mechanism is fixedly arranged on a fixing column 41 between the bottom plate 2 and the panel 1. A opening pawl 5 linked to the transmission plate 4 is rotatably sleeved on the fixing column 41. A rotating groove 51 is arranged in the opening pawl 5, and a driving block 54 is rotatably installed in the rotating groove 51. An elastic member 42 is sleeved on the fixing column 41. One end of the elastic member 42 extends into the driving block 54 to make the driving block 54 extend out of the rotating groove 51 and be linked to the transmission plate 4, and the other end is fixed on the panel 1. By improving the structural setting of the opening mechanism and using the elastic member 42 to replace components such as the convex block and spring on the original opening pawl 5, the structure of the opening pawl 5 is greatly simplified, production, manufacturing, and processing are more convenient, and the production and manufacturing costs are reduced.

[0024] The outer arc of the driving block 54 and the rotation center of the opening pawl 5 are concentrically arranged. Setting the outer arc of the driving block 54 and the rotation center of the opening pawl 5 to be concentric simplifies the processing cost, stabilizes the opening tripping force, simplifies the design difficulty, and improves the production and installation efficiency.

[0025] A plug-in slot 541 is arranged on the driving block 54, and a plug-in hole 52 communicating with the rotating groove 51 is arranged on the opening pawl 5. One end of the elastic member 42 extends into the plug-in slot 541 through the plug-in hole 52 and is elastically clamped with the driving block 54. The elastic force of the elastic member 42 can keep the driving block 54 in a state of extending out of the rotating groove 51 all the time, which is convenient for quick reset and retention during closing.

[0026] A fixing pin 53 is arranged in the rotating groove 51, and the driving block 54 is rotatably installed in the rotating groove 51 through the fixing pin 53.

[0027] A fixing hole 11 is arranged on the panel 1. The end of the elastic member 42 is in a hook shape and is hooked and fixed with the fixing hole 11. The fixing hole 11 has a space that can make the elastic member 42 rotate. Driven by the transmission plate 4, the driving block 54 will drive the elastic member 42 to rotate together, and the fixing hole 11 plays a limiting role.

[0028] The elastic member 42 is a spring or a torsion spring. The material of the elastic member 42 is easy to obtain and has a low cost, further reducing the production and manufacturing costs.

[0029] A groove 31 is arranged on the opening toggle arm 3. The opening toggle arm 3 makes the groove 31 abut against the end of the opening pawl 5 through a rotating action to realize the opening function.

[0030] A limiting post 12 is provided between the panel 1 and the bottom plate 2. A limiting groove 55 is provided at the end of the opening release pawl 5. The limiting post 12 abuts against the limiting groove 55 in the closing state. The limiting post 12 is used to limit the rotation angle of the opening release pawl 5 to prevent its excessive rotation angle from affecting the movement track of the transmission plate 4.

[0031] Although the present invention has been described with reference to several specific embodiments, it should be understood that the present invention is not limited to the specific embodiments disclosed. The present invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A tripping mechanism for a thin circuit breaker, the thin circuit breaker comprising a panel, a bottom plate, a tripping arm and a transmission plate, characterized in that: The opening mechanism is fixed on a fixed column between the base plate and the panel, and a closing latch which is linked to the transmission plate is rotatably sleeved on the fixed column. A rotating groove is provided in the opening latch, and a driving block is rotatably installed in the rotating groove. An elastic member is sleeved on the fixed column, and one end of the elastic member extends into the driving block so that the driving block extends out of the rotating groove and is linked to the transmission plate, and the other end is fixed on the panel.

2. The opening mechanism of the thin circuit breaker according to claim 1, characterized in that: The outer arc of the driving block and the rotation center of the opening latch are concentrically arranged.

3. The opening mechanism of the thin circuit breaker according to claim 1, characterized in that: The driving block is provided with a plug-in slot, the opening latch is provided with a plug-in hole connected with the rotating slot, and one end of the elastic member extends into the plug-in slot through the plug-in hole to be elastically engaged with the driving block.

4. The opening mechanism of the thin circuit breaker according to claim 3, characterized in that: A fixing pin is arranged in the rotating groove, and the driving block is rotatably mounted in the rotating groove through the fixing pin.

5. The opening mechanism of the thin circuit breaker according to claim 1, characterized in that: The panel is provided with a fixing hole, and the end of the elastic member is hooked and fixed to the fixing hole.

6. The opening mechanism of the thin circuit breaker according to claim 1 or 5, characterized in that: The elastic member is a spring or a torsion spring.

7. The opening mechanism of the thin circuit breaker according to claim 1, characterized in that: The opening switch crank arm is provided with a groove, and the opening switch crank arm realizes the opening switch function by rotating the groove and the end of the opening switch latch.

8. The opening mechanism of the thin circuit breaker according to claim 1, characterized in that: A limiting column is arranged between the panel and the bottom plate, a limiting groove is arranged at the end of the opening latch, and the limiting column abuts against the limiting groove in the closing state.

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