Circuit breaker operating mechanism

Abstract

A circuit breaker operating mechanism belongs to the technical field of circuit breakers. Comprising a side plate, a handle lever, an energy storage spring and a jump pin lever, the handle lever is rotatably arranged on the side plate, an installation feature for installing the energy storage spring is arranged on the handle lever, and an area through which a connecting line formed by the rotation center of the handle lever and the installation feature passes in the movement process of the operating mechanism is a fan-shaped area. The tripping mechanism is characterized in that boundary lines on the two sides of the fan-shaped area are prolonged to obtain a new area including the fan-shaped area, the handle lever is further provided with a contact feature used for pushing the tripping lever to perform re-tripping action, and the motion trail of the contact feature is located in the new area. The operating mechanism has the advantages that mutual interference among parts can be avoided, the mounting space occupied by the operating mechanism can be reduced, the number of the parts is reduced, the structure is simplified, and the cost is saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit breakers, and in particular relates to an operating mechanism of a circuit breaker. Background Art

[0002] The operating mechanism in the circuit breaker uses a handle lever to push the trip lever into the lock lever during the re-triggering action, and locks the lock lever to achieve the purpose of converting the five-link in the free state into a four-link with only one degree of freedom. In the previous design, due to the limitation of the installation space, the contact features of the handle lever that push the trip lever action need to be set on both sides of the energy storage spring and the handle lever movement area, but due to the presence of other parts in the two side areas, it is inevitable to occupy the space of other functions, which not only increases the volume of the lever parts and the total space occupied, but also increases the number of parts used, which increases the complexity of the operating mechanism as a whole and reduces the reliability.

[0003] In view of the above-mentioned prior art, it is necessary to reasonably improve the structure of the existing circuit breaker operating mechanism. To this end, the applicant has made a useful design, and the technical solution to be introduced below is produced under this background. Utility Model Content

[0004] The task of the utility model is to provide a circuit breaker operating mechanism, which can avoid mutual interference between various parts, reduce the installation space occupied by the operating mechanism, reduce the number of parts, simplify the structure, and save costs.

[0005] The task of the utility model is accomplished in this way. A circuit breaker operating mechanism includes a side plate, a handle lever, an energy storage spring, and a trip lever. The handle lever is rotatably arranged on the side plate around a rotation center, and the handle lever is provided with an installation feature for installing the energy storage spring. The area passed by the line formed by the rotation center of the handle lever and the installation feature during the movement of the operating mechanism is a fan-shaped area. The characteristic is that: the boundary lines on both sides of the fan-shaped area are extended to obtain a new area including the fan-shaped area. The handle lever is also provided with a contact feature for pushing the trip lever to perform a re-tripping action, and the movement trajectory of the contact feature is located in the new area.

[0006] In a specific embodiment of the present invention, the installation feature is a shaft passing through the handle lever or a boss arranged on the handle lever.

[0007] In another specific embodiment of the present invention, the contact feature is a shaft passing through the handle lever or a boss or bend provided on the handle lever.

[0008] In yet another specific embodiment of the present invention, the contact feature and the installation feature share a common component.

[0009] In yet another specific embodiment of the present invention, the contact features are located at other positions in the new area except the fan-shaped area.

[0010] In another specific embodiment of the utility model, the operating mechanism also includes a locking lever, an upper connecting rod, a lower connecting rod, and a rotating shaft. One end of the energy storage spring is hung on the mounting feature of the handle lever, and the other end is hung on the hinge shaft between the upper connecting rod and the lower connecting rod; the tripping lever is rotatably set on the side plate, and the locking lever is rotatably set on the side plate; one end of the upper connecting rod is pivotally set on the tripping lever, and the other end is hinged to the lower connecting rod, and the other end of the lower connecting rod is hinged to the rotating shaft, and the rotating shaft is provided with a moving contact of the contact system, and the contact feature pushes the tripping lever to engage with the locking lever.

[0011] In another specific embodiment of the present invention, when the operating mechanism is in the open position, a line connecting the rotation center and one edge of the installation feature is determined as a first side boundary line of the fan-shaped area; when the operating mechanism is in the closed position, a line connecting the rotation center and another edge of the installation feature is determined as a second side boundary line of the fan-shaped area, and a movement trajectory of another edge of the installation feature between the open position and the closed position is determined as an arc boundary line of the fan-shaped area, and the first side boundary line, the second side boundary line and the arc boundary line constitute the fan-shaped area.

[0012] The utility model has the following beneficial effects due to the adoption of the above structure: firstly, the contact feature on the handle lever for pushing the trip lever to perform a re-buttoning action is designed in the fan-shaped area defined by the movement area of ​​the handle lever and the energy storage spring, which can avoid mutual interference between the various parts and reduce the installation space occupied by the operating mechanism. Furthermore, by integrating with other functional components, for example, sharing the contact feature with the installation feature, the effect of reducing the number of parts, simplifying the structure and saving costs can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of a circuit breaker in an embodiment of the utility model when it is in a tripped free state;

[0014] Figure 2 It is a schematic diagram of a circuit breaker in an embodiment of the utility model when it is in an open state;

[0015] Figure 3 It is a schematic diagram of a circuit breaker in a closed state in one embodiment of the utility model;

[0016] Figure 4 This is a schematic diagram of a sector-shaped area in one embodiment of the utility model;

[0017] Figure 5 A schematic diagram of a new area in an embodiment of the utility model; (abstract diagram)

[0018] Figure 6 This is a schematic diagram of another embodiment of the present invention in which the contact feature and the installation feature are respectively arranged at different positions of the handle lever.

[0019] In the figure: 1. Side panel; 2. Handle lever, 21. Contact feature, 22. Installation feature, 23. Center of rotation; 3. Energy storage spring; 4. Trip lever, 41. Trip end; 5. Lock lever, 51. Lock end, 52. Stopper; 6. Upper connecting rod; 7. Lower connecting rod; 8. Rotating shaft; 9. Fan-shaped area, 91. First side boundary line, 92. Second side boundary line, 93. Arc boundary line; 10. New area; 11. Moving contact; 12. Stationary contact; 13. Articulated shaft. DETAILED DESCRIPTION

[0020] The specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings, but the description of the embodiments is not a limitation of the technical solution. Any changes in form rather than substance based on the concept of the present invention should be regarded as the protection scope of the present invention.

[0021] In the following description, all concepts related to directionality or orientation such as up, down, left, right, front and back are based on the positions shown in the corresponding drawings. They are only used to facilitate the description of the technical solution provided by the utility model and simplify the description in conjunction with the drawings, and therefore cannot be understood as a special limitation on the technical solution provided by the utility model.

[0022] See also Figure 1 The utility model relates to a circuit breaker operating mechanism, which is one of the important components of the circuit breaker. The circuit breaker also includes a contact system, a tripping system and an arc extinguishing system. When a circuit fault occurs, the tripping system responds to the overload or short-circuit current and actuates the operating mechanism to trip, thereby driving the moving contact 11 and the static contact 12 of the contact system to separate and disconnect the circuit.

[0023] like Figures 1 to 6 As shown, the operating mechanism includes a side plate 1, a handle lever 2, an energy storage spring 3, a trip lever 4, a lock lever 5, an upper connecting rod 6, a lower connecting rod 7, and a rotating shaft 8. The handle lever 2 is rotatably arranged on the side plate 1 around a rotation center 23. One end of the energy storage spring 3 is hung on the handle lever 2, and the other end is hung on a hinge shaft 13 between the upper connecting rod 6 and the lower connecting rod 7. The trip lever 4 is rotatably arranged on the side plate 1, and the lock lever 5 is rotatably arranged on the side plate 1. One end of the upper connecting rod 6 is pivotally arranged on the trip lever 4, and the other end is hinged to the lower connecting rod 7. The other end of the lower connecting rod 7 is hinged to the rotating shaft 8, and the rotating shaft 8 is provided with a moving contact 11 of the contact system.

[0024] The handle lever 2 is provided with a mounting feature 22 for mounting one end of the energy storage spring 3, and the handle lever 2 is also provided with a contact feature 21 for pushing the trip lever 4 to perform a re-tripping action. When the above tripping system responds to an overload or short-circuit current, the actuation is in Figure 3 The lock lever 5 in the position rotates clockwise, the lock lever 5 releases the lock on the trip lever 4, the trip lever 4 rotates counterclockwise under the spring force of the energy storage spring 3, and the operating mechanism is a five-link mechanism in a free state, such as Figure 1 As shown, this process is the mechanism tripping process, during which the operating mechanism drives the rotating shaft 8 to rotate clockwise through the upper connecting rod 6 and the lower connecting rod 7, thereby driving the moving contact 11 and the static contact 12 in the contact system to separate.

[0025] exist Figure 1 When the latch is in the above position, the operator manually or electrically drives the handle lever 2 to rotate clockwise, and the contact feature 21 on the handle lever 2 pushes the tripping lever 4 to rotate clockwise, so that the tripping lever 4 contacts the locking lever 5. When the tripping end 41 on the tripping lever 4 moves below the locking end 51 of the locking lever 5, the locking lever 5 rotates counterclockwise under the action of its own return spring until the stopper 52 falls and abuts against one side of the locking lever 5. Finally, under the action of the energy storage spring 3, the tripping end 41 of the tripping lever 4 and the locking end 51 of the locking lever 5 are buckled together. At this point, the tripping lever 4 and the locking lever 5 re-establish the buckling relationship, and the operating mechanism is a four-bar linkage with only one degree of freedom, such as Figure 2 As shown, the tripping lever 4 and the locking lever 5 cannot move relative to each other, and this process is the mechanism re-locking process.

[0026] like Figure 2 As shown, when the operating mechanism maintains the four-bar linkage, the handle lever 2 is driven to rotate counterclockwise, and the installation feature 22 on the handle lever 2, that is, the upper hanging point of the energy storage spring 3, is pulled through the dead point (the upper hanging point and the upper connecting rod are in the same straight line position), and the direction of the force of the energy storage spring 3 on the upper connecting rod 6 changes from counterclockwise to clockwise, and the energy storage spring 3 then pulls the hinge shaft 13 of the upper connecting rod 6 and the lower connecting rod 7, driving the rotating shaft 8 to rotate counterclockwise, thereby driving the moving contact 11 and the static contact 12 in the contact system to close and reach the closing position.

[0027] The technical innovation of the present utility model lies in the setting of the contact feature 21 on the handle lever 2: the rotation center 23 of the handle lever 2 and the installation feature 22 for installing the energy storage spring 3 form a connecting line, and the area through which this connecting line passes during the movement of the operating mechanism is a fan-shaped area 9, such as Figure 4 As shown, by extending the boundary lines on both sides of the sector-shaped region 9, a new region 10 including the sector-shaped region 9 can be obtained, as shown in FIG. Figure 5 As shown, a contact feature 21 for pushing the trip lever 4 to perform a re-tightening action is provided on the handle lever 2, and the movement trajectory of the contact feature 21 is located in the new area 10. That is, during the entire action process of the operating mechanism, the contact feature 21 is located in the new area 10, and the specific content is as follows.

[0028] like Figure 1 In this embodiment, the mounting feature 22 is a shaft passing through the handle lever 2, and one end of the energy storage spring 3 is hung on the shaft. During the buckling process, the contact feature 21 formed by the edge of the shaft is always in contact with the tripping lever 4, and pushes the tripping lever 4 to Figure 1 Position, turn clockwise until it reaches the action completion position, that is, Figure 2 In the position shown, the trip lever 4 is latched with the lock lever 5.

[0029] Reference Figure 2 At this time, the operating mechanism is in the open position, and the line connecting the rotation center 23 and the lower edge of the shaft is determined as the side boundary line of the fan-shaped area 9, which is the first side boundary line 91; Figure 3 At this time, the operating mechanism is in the closing position, and the line connecting the rotation center 23 and the upper edge of the shaft is determined as the other side boundary line of the sector area 9, that is, the second side boundary line 92. Figure 4 The motion trajectory of another edge of the shaft between the opening position and the closing position is determined as the arc boundary line 93 of the sector-shaped area 9 located on the right side of the figure, and the first side boundary line 91, the second side boundary line 92 and the arc boundary line 93 constitute the sector-shaped area 9.

[0030] See also Figure 5 , the extension lines of the boundary lines on both sides of the sector area 9 are used to obtain a new area 10 including the sector area 9, the new area 10 has the same central angle as the sector area 9, but has a wider radiation area than the sector area 9. The contact feature 21 is located in the new area 10, preferably, the contact feature 21 and the mounting feature 22 share a part, which is a circular shaft part in this embodiment. At this time, the contact feature 21 is located in the new area 10, and its movement trajectory is close to the arc boundary line 93 of the sector area 9.

[0031] See also Figure 6 The contact feature 21 can also be set at different positions of the handle lever 2 together with the installation feature 22 for installing the energy storage spring 3, including but not limited to the form of using two circular axes in the schematic diagram, wherein the installation feature 22 is still in the fan-shaped area 9, and the contact feature 21 can be in the remaining positions in the new area 10 except the fan-shaped area 9, and during all movement processes, the contact feature 21 is always within the range of the new area 10.

[0032] In addition, the installation feature 22 can also be a boss set on the handle lever 2, and the contact feature 21 can also be a boss or a bend set on the handle lever 2, that is, there is no restriction on the shape and installation method of the installation feature 22 and the contact feature 21, as long as the installation feature 22 can play the role of installing the energy storage spring 3 and the contact feature 21 can play the role of pushing the trip lever 4.

Claims

1. A circuit breaker operating mechanism, comprising a side plate (1), a handle lever (2), an energy storage spring (3), and a trip lever (4), wherein the handle lever (2) is rotatably arranged on the side plate (1) around a rotation center (23), and the handle lever (2) is provided with a mounting feature (22) for mounting the energy storage spring (3), and the area passed by the line formed by the rotation center (23) of the handle lever (2) and the mounting feature (22) during the movement of the operating mechanism is a fan-shaped area (9), characterized in that: The boundary lines on both sides of the sector-shaped area (9) are extended to obtain a new area (10) including the sector-shaped area (9), and the handle lever (2) is also provided with a contact feature (21) for pushing the tripping lever (4) to perform a re-tightening action, and the movement trajectory of the contact feature (21) is located in the new area (10).

2. The circuit breaker operating mechanism according to claim 1, characterized in that: The installation feature (22) is a shaft passing through the handle lever (2) or a boss arranged on the handle lever (2).

3. The circuit breaker operating mechanism according to claim 1, characterized in that: The contact feature (21) is a shaft passing through the handle lever (2) or a boss or bend arranged on the handle lever (2).

4. The circuit breaker operating mechanism according to claim 1, characterized in that: The contact feature (21) and the mounting feature (22) share a common component.

5. The circuit breaker operating mechanism according to claim 1, characterized in that: The contact features (21) are located at the remaining positions in the new area (10) except the fan-shaped area (9).

6. The circuit breaker operating mechanism according to claim 1, characterized in that: The operating mechanism also includes a locking lever (5), an upper connecting rod (6), a lower connecting rod (7), and a rotating shaft (8); one end of the energy storage spring (3) is hung on the mounting feature (22) of the handle lever (2), and the other end is hung on the hinge shaft (13) between the upper connecting rod (6) and the lower connecting rod (7); the tripping lever (4) is rotatably arranged on the side plate (1), and the locking lever (5) is rotatably arranged on the side plate (1); one end of the upper connecting rod (6) is pivotally arranged on the tripping lever (4), and the other end is hinged to the lower connecting rod (7); the other end of the lower connecting rod (7) is hinged to the rotating shaft (8); the rotating shaft (8) is provided with a moving contact (11) of a contact system; the contact feature (21) pushes the tripping lever (4) to engage with the locking lever (5).

7. The circuit breaker operating mechanism according to claim 1, characterized in that: When the operating mechanism is in the opening position, a line connecting the rotation center (23) and one edge of the mounting feature (22) is determined as a first side boundary line (91) of the fan-shaped area (9); when the operating mechanism is in the closing position, a line connecting the rotation center (23) and another edge of the mounting feature (22) is determined as a second side boundary line (92) of the fan-shaped area (9), and a motion trajectory of another edge of the mounting feature (22) between the opening position and the closing position is determined as an arcuate boundary line (93) of the fan-shaped area (9), and the first side boundary line (91), the second side boundary line (92) and the arcuate boundary line (93) constitute the fan-shaped area (9).

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