Operating mechanism of molded case circuit breaker

Abstract

The utility model belongs to the technical field of circuit breakers, and particularly discloses an operating mechanism of a molded case circuit breaker, which comprises a moving contact, a rotating shaft, a lower connecting rod, a connecting rod shaft, an upper connecting rod, a main spring and a closing lever, and is characterized in that the rotating shaft is rotatably mounted on a mechanism side plate, one end of the lower connecting rod is connected with the rotating shaft, and the other end of the lower connecting rod is mounted on the connecting rod shaft; one end of the upper connecting rod is connected with the connecting rod shaft, and the other end of the upper connecting rod is installed on the jump pin assembly. One end of the main spring is connected with the connecting rod shaft, the other end of the main spring is fixedly connected with the closing lever, and the closing lever is installed on the mechanism side plate. According to the utility model, a novel operating mechanism is designed, the operating mechanism is applied to the molded case circuit breaker, the AC / DC universal requirement is met, the modularized horizontal mechanism with a miniaturized characteristic is provided, and the adaptive circuit breaker can have more space for insulation design; the whole structure is installed on the mechanism side plate, the space utilization rate is improved, and the rotating shaft is installed on the mechanism side plate, so that positioning of the rotating shaft is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, and in particular to an operating mechanism for a molded case circuit breaker. Background Technology

[0002] Due to the increase in voltage levels, the insulation design of molded case circuit breakers has become increasingly stringent, and the space allocated for insulation design is insufficient to meet the requirements. At the same time, the AC / DC universal platform design also requires more space points for fastening the arc-extinguishing module (AC has a greater breaking energy, and insufficient fasteners can easily lead to shell disintegration and breaking failure). Therefore, a new mechanism needs to be redesigned to adapt to the high-voltage platform. Utility Model Content

[0003] The purpose of this utility model is to solve the technical problems existing in the background art. To this end, an operating mechanism for a molded case circuit breaker is provided.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] An operating mechanism for a molded case circuit breaker includes a moving contact and a rotating shaft connected to each other, the rotating shaft being rotatably mounted on a side plate of the mechanism;

[0006] It also includes the lower connecting rod, connecting rod shaft, upper connecting rod, main spring, and closing lever;

[0007] One end of the lower connecting rod is connected to the rotating shaft, and the other end of the lower connecting rod is mounted on the connecting rod shaft;

[0008] One end of the upper connecting rod is connected to the connecting rod shaft, and the other end of the upper connecting rod is mounted on the jump buckle assembly;

[0009] One end of the main spring is connected to the connecting rod shaft, and the other end of the main spring is fixedly connected to the closing lever, which is mounted on the side plate of the mechanism.

[0010] The following is a further defined technical solution of this utility model: the jump buckle assembly includes a jump buckle plate, a jump buckle shaft one is installed at the middle position of the jump buckle plate, and the jump buckle shaft one is inserted into the end of the upper connecting rod. One end of the jump buckle plate is connected to a jump buckle shaft two, which is installed on the side plate of the mechanism. The end of the jump buckle plate near the jump buckle shaft two abuts or separates from the connecting rod shaft, and the end of the jump buckle plate away from the jump buckle shaft two is connected to a primary lock. The middle position of the primary lock is rotatably installed on the side plate of the mechanism, one end of the primary lock abuts or separates from the jump buckle plate, and the other end of the primary lock abuts against a traction rod, which is rotatably installed on the side plate of the mechanism.

[0011] The following is a further defined technical solution of this utility model: a traction rod return spring is connected between the traction rod and the side plate of the mechanism, and a primary lock return spring is connected between the primary lock and the side plate of the mechanism.

[0012] The following is a further technical solution of this utility model: the side plate of the mechanism is fixedly installed with a limiting shaft, and the limiting shaft abuts against or separates from the primary lock and the traction rod.

[0013] The following is a further defined technical solution of this utility model: the side plate of the mechanism is fixedly installed with a fixed shaft, the fixed shaft is located above the jump buckle plate and the upper connecting rod, and the fixed shaft and the upper connecting rod are in rolling contact, and the fixed shaft and the jump buckle plate are in collision contact.

[0014] The following is a further technical solution of this utility model: the end of the closing lever away from the main spring is fixedly connected to the handle.

[0015] Compared with the prior art, the present invention has the following technical effects:

[0016] This utility model designs a new operating mechanism for use in molded case circuit breakers, meeting the requirements for both AC and DC applications. It features a miniaturized, modular horizontal mechanism, allowing for more space in the circuit breaker for insulation design. The overall structure is mounted on the side plate of the mechanism, which improves space utilization. The rotating shaft is also mounted on the side plate, facilitating its positioning.

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the handle in the closed position in this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of this utility model where the handle is in the open position and the moving contact is not open;

[0021] Figure 3 This is a schematic diagram of the structure of this utility model where the handle is in the open position and the moving contact is open;

[0022] Figure 4 This is a partial structural schematic diagram of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of the upper connecting rod and the jump buckle plate in this utility model;

[0024] Figure 6 This is a partial structural diagram of the closing latch state in this utility model;

[0025] Figure 7 This is a partial structural diagram of the initial stage of the tripping process in this utility model;

[0026] Figure 8 This is a partial structural diagram of the tripping process in this utility model;

[0027] Figure 9 This is a partial structural diagram of the tripped and open state of this utility model;

[0028] Figure 10 This is a partial structural diagram of the tripping process in this utility model;

[0029] Figure 11 This is a schematic diagram of the structure of the rotating shaft installed on the side plate of the mechanism in this utility model;

[0030] Figure 12 This is a schematic diagram of the fixed shaft structure in this utility model;

[0031] Figure 13 This is a schematic diagram of the upper connecting rod in this utility model;

[0032] Figure 14 This is a schematic diagram of the connecting rod shaft in this utility model;

[0033] Figure 15 This is a schematic diagram of the structure of the lock and traction rod resetting in this utility model;

[0034] Figure 16 This is a schematic diagram of the part of the structure in this utility model where the jump buckle plate and the primary lock buckle are fastened together;

[0035] Figure 17 This is a schematic diagram of the structure in which the jump buckle plate and the primary lock buckle are fastened together in this utility model;

[0036] Figure 18 This is a schematic diagram of the part of the structure in this utility model where the jump buckle plate and the primary lock buckle are disengaged;

[0037] Figure 19 This is a schematic diagram of the structure of the jump buckle plate and the primary buckle being re-fastened in this utility model;

[0038] Figure 20 This is a schematic diagram of the structure of the jumper plate in this utility model;

[0039] Figure 21 This is a structural schematic diagram of the primary locking mechanism from one perspective in this utility model;

[0040] Figure 22 This is a structural schematic diagram of the primary locking mechanism from another perspective in this utility model;

[0041] Figure 23 This is a schematic diagram of the structure of the primary locking buckle installed on the side plate of the mechanism in this utility model;

[0042] Figure 24 This is a schematic diagram of the structure of the side plate of the mechanism in this utility model;

[0043] Figure 25 This is a schematic diagram of the traction plate in this utility model.

[0044] Figure label:

[0045] 1. Moving contact;

[0046] 2. Shaft;

[0047] 3. Lower connecting rod;

[0048] 4. Upper connecting rod; 401. Upper connecting rod arc surface; 402. Connecting rod shaft connection hole; 403. Jumper shaft mounting hole;

[0049] 5. Closing lever;

[0050] 6. Handle;

[0051] 7. Jump buckle plate; 701. Jump buckle shaft mounting hole; 702. Connecting rod shaft limiting surface; 703. Upper connecting rod mounting hole; 704. Primary lock limit block; 705. Primary lock reset blocking feature surface; 706. Primary lock latch surface;

[0052] 8. Primary locking; 801. Reset blocking feature surface; 802. Jumper plate latch surface; 803. Primary lock rotation center; 804. Limiting feature surface; 805. Hook and latch feature surface; 806. Hook and latch amount limiting feature surface;

[0053] 9. Mechanism side plate; 901. Rotary shaft fixing pin mounting hole; 902. Jumper shaft mounting hole; 903. Fixed shaft mounting hole; 904. Lever limiting feature surface; 905. Traction rod mounting hole; 906. Limiting shaft mounting hole; 907. Primary locking mounting hole;

[0054] 10. Traction rod; 1001. Limiting feature surface; 1002. First-time locking buckle surface; 1003. Buckle amount limiting feature surface; 1004. Rotation center hole; 1005. Electromagnet striking feature surface;

[0055] 11. Connecting rod shaft; 1101. Lower connecting rod mounting surface; 1102. Upper connecting rod mounting surface; 1103. Jumper plate limiting mating surface; 1104. Main spring hanging point;

[0056] 12. Jump and buckle axis two;

[0057] 13. Fixed shaft; 1301. Side plate fixing surface; 1302. Upper connecting rod and jumper mating surface;

[0058] 14. Jump buckle axis one;

[0059] 15. Primary lock reset spring; 1501. Primary lock reset spring hanging point one; 1502. Primary lock reset spring hanging point two;

[0060] 16. Traction rod return spring; 1601. Traction rod return spring hanging point one; 1602. Traction rod return spring hanging point two;

[0061] 17. Limiting shaft. Detailed Implementation

[0062] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0063] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0064] In the description of this utility model, it should be understood that the terms "a" and "b" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "a" or "b" may explicitly or implicitly include at least one of those features.

[0065] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0066] like Figure 1-25 As shown, this embodiment provides an operating mechanism for a molded case circuit breaker, which mainly consists of a moving contact 1, a rotating shaft 2, a lower connecting rod 3, an upper connecting rod 4, a closing lever 5, a handle 6, a trip plate 7, a primary locking latch 8, a traction rod 10, a connecting rod shaft 11, a second trip pin shaft 12, a fixed shaft 13, a first trip pin shaft 14, and a limit shaft 17.

[0067] like Figure 12 As shown, the fixed shaft 13 is symmetrically arranged: both ends are side plate fixing surfaces 1301, which are used to fix the two ends of the shaft 13 to be installed on the side plates 9 of the mechanism on both sides; the middle part is set as the upper connecting rod and jump buckle mating surface 1302, which is used to fix the middle part of the shaft 13 to contact the upper connecting rod 4 and the jump buckle plate 7.

[0068] like Figure 13 As shown, the upper connecting rod 4 is provided with an upper connecting rod arc surface 401, a connecting rod shaft connecting hole 402, and a jump buckle shaft mounting hole 403. The upper connecting rod arc surface 401 is used for contact between the upper connecting rod 4 and the fixed shaft 13; the connecting rod shaft connecting hole 402 is used to install the connecting rod shaft 11, so that the upper connecting rod 4 is hinged at the middle position of the connecting rod shaft 11; the jump buckle shaft mounting hole 403 is used to install the jump buckle shaft 14, and through the jump buckle shaft 14, the upper connecting rod 4 is inserted into the jump buckle plate 7.

[0069] like Figure 14 As shown, the connecting rod shaft 11 is symmetrically arranged: the connecting rod shaft 11 is provided with a lower connecting rod mounting surface 1101, an upper connecting rod mounting surface 1102, a jump buckle plate limiting mating surface 1103, and a main spring hanging point 1104. The lower connecting rod mounting surface 1101 is used to mount the lower connecting rod 3; in this embodiment, there are two symmetrical lower connecting rods 3. The upper connecting rod mounting surface 1102 is used to mount the upper connecting rod 4; in this embodiment, there are two symmetrical upper connecting rods 4. The jump buckle plate limiting mating surface 1103 is used to contact the jump buckle plate 7. The main spring hanging point 1104 is used for a hook-type connection at the end of the main spring.

[0070] like Figure 20As shown, the jump buckle plate 7 is provided with a jump buckle shaft mounting hole 701, a connecting rod shaft limiting surface 702, an upper connecting rod mounting hole 703, a primary lock limiting block 704, a primary lock reset blocking feature surface 705, and a primary lock latching surface 706. Specifically, the jump buckle shaft mounting hole 701 is used to install the second jump buckle shaft 12, so that the end of the jump buckle plate 7 is in the middle position of the second jump buckle shaft 12; the connecting rod shaft limiting surface 702 is used to contact the connecting rod shaft 11 for limiting; the upper connecting rod mounting hole 703 is used to install the first jump buckle shaft 14, and the jump buckle plate 7 is inserted into the upper connecting rod 4 via the first jump buckle shaft 14; the primary lock limiting block 704 is used to limit the primary lock 8 to prevent over-tightening; the primary lock reset blocking feature surface 705 is used to limit the reset of the primary lock 8; and the primary lock latching surface 706 is used for the latching engagement between the jump buckle plate 7 and the primary lock 8.

[0071] like Figure 21 and 22 As shown, the primary locking buckle 8 is provided with a reset blocking feature surface 801, a jump buckle plate latching surface 802, a primary lock rotation center 803, a limiting feature surface 804, a latching feature surface 805, and a latching amount limiting feature surface 806. Specifically, the reset blocking feature surface 801 is used to block and limit the primary locking buckle 8 when it resets; the jump buckle plate latching surface 802 is used for the latching engagement between the primary locking buckle 8 and the jump buckle plate 7; the primary lock rotation center 803 is used for the primary locking buckle 8 to rotate and be mounted on the mechanism side plate 9; the limiting feature surface 804 is used to limit the rotation angle of the primary locking buckle 8 and is in contact with the limiting shaft 17; the latching feature surface 805 is used for the latching engagement between the primary locking buckle 8 and the traction rod 10; and the latching amount limiting feature surface 806 is used to set the latching area between the primary locking buckle 8 and the traction rod 10.

[0072] like Figure 24 As shown, the side plate 9 of the mechanism is provided with a rotating shaft fixing pin mounting hole 901, a jump buckle shaft 2 mounting hole 902, a fixed shaft mounting hole 903, a lever limiting feature surface 904, a traction rod mounting hole 905, a limiting shaft mounting hole 906, and a primary lock mounting hole 907. Specifically, the rotating shaft fixing pin mounting hole 901 is used to install the rotating shaft fixing pin (the rotating shaft fixing pin is fixedly connected to the center of the rotating shaft 1), thereby allowing the rotating shaft 1 to be rotatably mounted on the side plate 9 of the mechanism; the jump buckle shaft 2 mounting hole 902 is used to rotatably install the end of the jump buckle shaft 2 12; the fixed shaft mounting hole 903 is used to rotatably install the end of the fixed shaft 13; the lever limiting feature surface 904 is used to limit the rotational position of the closing lever 5; the traction rod mounting hole 905 is used to rotatably install the traction rod 10; the limiting shaft mounting hole 906 is used to rotatably install the limiting shaft 17; and the primary lock mounting hole 907 is used to rotatably install the primary lock 8.

[0073] like Figure 25As shown, the traction rod 10 is provided with a limiting feature surface 1001, a primary locking latch surface 1002, a latching amount limiting feature surface 1003, a rotation center hole 1004, and an electromagnet striking feature surface 1005. The limiting feature surface 1001 is used to limit the rotation angle of the traction rod 10 and contacts the limiting shaft 17; the primary locking latch surface 1002 is used for the latching engagement between the traction rod 10 and the primary locking latch 8; the latching amount limiting feature surface 1003 is used to set the latching area between the traction rod 10 and the primary locking latch 8; the rotation center hole 1004 is used for the traction rod 10 to be rotatably mounted on the mechanism side plate 9; and the electromagnet striking feature surface 1005 is used for the electromagnet to strike, thereby causing the traction rod 10 to rotate.

[0074] like Figure 15 As shown, the primary latch 8 is reset using a primary latch return spring 15. The two ends of the primary latch return spring 15 are hooked to primary latch return spring hook point one 1501 and primary latch return spring hook point two 1502, respectively. Among them, primary latch return spring hook point one 1501 is set on the primary latch 8, and primary latch return spring hook point two 1502 is set on the side plate 9 of the mechanism.

[0075] The traction rod 10 is reset using the traction rod return spring 16. The two ends of the traction rod return spring 16 are hooked to the first hook point 1601 and the second hook point 1602, respectively. The first hook point 1601 is located on the traction rod 10, and the second hook point 1602 is located on the side plate 9 of the mechanism.

[0076] like Figure 11 As shown, the moving contact 1 is fixedly mounted on the radial outer wall of the rotating shaft 2, and the center position of the rotating shaft 2 is rotatably mounted on the side plate 9 of the mechanism. Mounting the rotating shaft 2 on the side plate 9 of the mechanism is beneficial for the positioning of the rotating shaft 2. Compared with the traditional solution where the rotating shaft 2 is mounted on the housing, the dimensional chain increases by two key dimensions, which is not only detrimental to the positioning of the rotating shaft 2, but also increases the product manufacturing and testing costs.

[0077] like Figure 1-4 As shown, one end of the lower connecting rod 3 is hinged to an eccentric position at the axial end of the rotating shaft 2, and the other end of the lower connecting rod 3 is hinged to the end position of the connecting rod shaft 11. One end of the upper connecting rod 4 is hinged to the middle position of the connecting rod shaft 11, and the other end of the upper connecting rod 4 has a jump-lock shaft mounting hole 403, into which the jump-lock shaft 14 is inserted. One end of the main spring is hinged to the middle position of the connecting rod shaft 11, and the other end of the main spring is fixedly connected to the closing lever 5, which is rotatably mounted on the side plate 9 of the mechanism. The end of the closing lever 5 away from the main spring is fixedly connected to the handle 6.

[0078] A first jumper shaft 14 is installed in the middle of the jumper plate 7. The first jumper shaft 14 is inserted into the mounting hole 403 of the end of the upper connecting rod 4. One end of the jumper plate 7 is fixedly connected to the middle of the second jumper shaft 12. One end of the second jumper shaft 12 is rotatably mounted on the side plate 9 of the mechanism. The other end of the second jumper shaft 12 is connected to an accessory.

[0079] The end of the jump buckle plate 7 near the second jump buckle shaft 12 is either in contact with or separate from the connecting rod shaft 11, and the end of the jump buckle plate 7 away from the second jump buckle shaft 12 is connected to a primary lock 8.

[0080] The central position of the primary latch 8 is rotatably mounted on the side plate 9 of the mechanism via the primary latch rotation center 803. One end of the primary latch 8 abuts against or separates from the jump latch plate 7 via the jump latch plate latching surface 802 (i.e., latching connection). The other end of the primary latch 8 abuts against the traction rod 10 via the latching feature surface 805. The traction rod 10 is rotatably mounted on the side plate 9 of the mechanism via the rotation center hole 1004. A traction rod return spring 16 is connected between the traction rod 10 and the side plate 9 of the mechanism, and a primary latch return spring 15 is connected between the primary latch 8 and the side plate 9 of the mechanism. A limiting shaft 17 is fixedly mounted on the side plate 9 of the mechanism, and the limiting shaft 17 abuts against or separates from the primary latch 8 and the traction rod 10. A fixing shaft 13 is fixedly mounted on the side plate 9 of the mechanism. The fixing shaft 13 is located above the jump latch plate 7 and the upper connecting rod 4, and the fixing shaft 13 makes rolling contact with the upper connecting rod 4 and collision contact with the jump latch plate 7.

[0081] like Figure 1 As shown, the operating mechanism is in the locked and closed state, and the handle 6 is in the closed position.

[0082] like Figure 2 As shown, the operating mechanism is in the locked and closed state, and the handle 6 is in the open position. At this time, the spring force of the main spring will drive the rotating shaft 2 to rotate, and then the moving contact 1 will open.

[0083] like Figure 3 As shown, handle 6 is in the open position, and moving contact 1 is open.

[0084] like Figure 4 As shown, the fixing of the upper connecting rod 4 and the jump-stop plate 7 has been changed from the traditional two-sided cantilever beam scheme to a centrally located scheme. Specifically: the jump-stop plate 7 is fixed to the rotation center by the second jump-stop shaft 12 (for greater stability and balance); the upper connecting rod 4 is inserted into the first jump-stop shaft 14. In position A, the end of the second jump-stop shaft 12 is connected to an accessory, which is triggered by the rotation of the jump-stop plate 7. In position B, the connecting rod is limited in the closed state, and the jump-stop plate 7 contacts the connecting rod shaft 11.

[0085] like Figure 5 As shown, at position C, the upper connecting rod 4 and the jump plate 7 are inserted into each other.

[0086] like Figure 6 As shown, in the closed locking state, due to the action of the main spring, the trip plate 7 tends to rotate counterclockwise around the rotation center (trip shaft 12); under the action of the main spring tension (double arrows indicate tension), the upper connecting rod 4 tends to rotate clockwise around the trip shaft 14. At this time, the connecting rod shaft 11 is in contact with the trip plate 7, and the trip plate 7 and the upper connecting rod 4 can be regarded as moving as a whole. Figure 6 The dashed box indicates the boundary of a partial screenshot of the overall structure.

[0087] like Figure 7 As shown, during the tripping process:

[0088] 1. The latch opens counterclockwise by turning it 8 times in one go;

[0089] 2. The jump buckle plate 7, the upper connecting rod 4, and the connecting rod shaft 11 rotate counterclockwise around the jump buckle shaft 12 under the action of the main spring tension (at this time, under the action of the spring force, the connecting rod shaft 11 contacts the jump buckle plate 7).

[0090] 3. After rotating a certain angle, it reaches... Figure 7 In the state shown, the upper connecting rod 4 is in contact with the fixed shaft 13, thereby generating a thrust F1.

[0091] 4. Under the action of F1, the upper connecting rod 4 will rotate counterclockwise around the jump buckle shaft 14, pushing the connecting rod shaft 11 away from the jump buckle plate 7.

[0092] At position D, in the initial stage of the release process, the release plate 7 and the upper connecting rod 4 move together in close contact under the action of spring force. Figure 7 The dashed box indicates the boundary of a partial screenshot of the overall structure.

[0093] like Figure 8 As shown, at position E, the upper link 4 is pushed, and the link shaft 11 disengages from the limit of the jump plate 7. Among these, Figure 8 The dashed box indicates the boundary of a partial screenshot of the overall structure. Based on the movement trajectory of the jump plate 7 and the upper connecting rod 4, the arc surface of the upper connecting rod 4 is designed to ensure contact between the fixed shaft 13 and the upper connecting rod 4, enabling no relative sliding during the disengagement movement, reducing frictional loss (rolling friction replaces sliding friction), and improving the efficiency of the mechanism.

[0094] like Figure 9 As shown, in the tripped and open state, the trip plate 7 and the upper connecting rod 4 continue to move until the trip plate 7 collides with the fixed shaft 13 and stops moving. Among these, Figure 9 The dashed box indicates the boundary of a partial screenshot of the overall structure.

[0095] like Figure 10As shown, during the release process, the thrust F1 exerted by the fixed shaft 13 on the upper connecting rod 4 tends to separate the upper connecting rod 4 from the release shaft 14. Under collision conditions, this poses a certain risk of separation. Therefore, the insertion opening direction of the upper connecting rod 4 is designed to be as perpendicular as possible to the direction of the F1 force to prevent the upper connecting rod 4 from separating from the release shaft 14. Figure 10 The dashed box indicates the boundary of a partial screenshot of the overall structure. F1 represents the thrust, and F0 represents the contraction force of the main spring.

[0096] like Figure 11 As shown, at position G, the rotating shaft 2 is mounted on the side plate 9 of the mechanism, which is beneficial for the positioning of the rotating shaft 2 (mounting it on the housing increases the dimension chain by two key dimensions, which is not only detrimental to the positioning of the rotating shaft, but also increases the product manufacturing and inspection costs).

[0097] like Figure 16 As shown, position H1 is the latching position between the jump buckle plate 7 and the primary lock 8; position H2 is the latching position between the primary lock 8 and the traction plate 10; position H3 is the latching amount limitation. The latching surface of the jump buckle plate 7 contacts the chamfered portion of the primary lock 8 (approximately line-surface contact), ensuring the stability of the force F2 applied to the primary lock 8 (including the magnitude and direction of the force). The traction rod 10 limits the counterclockwise rotation tendency of the primary lock 8 (position H2), and the primary lock 8 limits the clockwise movement tendency of the traction rod 10 (position H3, latching amount limitation). Figure 16 The dashed box indicates the boundary of a partial screenshot of the overall structure.

[0098] Figure 18 As shown, the release process is as follows: the traction rod 10 rotates counterclockwise, releasing the primary lock 8; the primary lock 8 then opens counterclockwise, releasing the jump plate 7, completing the release action of the operating mechanism. In position J1, the primary lock 8 opens to avoid the jump plate 7; in position J2, the limiting shaft 17 limits the primary lock 8; in position J3, the limiting shaft 17 limits the traction rod 10; in position J4, the traction rod 10 flips to avoid the primary lock 8. Among these, Figure 18 The dashed box indicates the boundary of a partial screenshot of the overall structure.

[0099] like Figure 19 As shown, during the re-fastening process, the rotation angle of the jump-button plate 7 around the release shaft 12 is larger, causing the latching surface to be unable to restrict the clockwise rotation of the primary latch 8 under the action of the primary latch return spring 15 (excessive rotation may cause jamming). A limiting feature is added to the jump-button plate 7 to prevent the primary latch 8 from jamming. Among these features, Figure 19 The double-headed arrow indicates the contraction force of the locking reset spring 15, and the dashed box indicates the boundary of the partial screenshot of the overall structure.

[0100] like Figure 23As shown, at position K, the locking mechanism 8 is inserted into the side plate 9 of the locking mechanism.

[0101] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Any person skilled in the art can make many possible variations and modifications to the technical solution of this utility model using the disclosed methods and techniques, or modify it into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of this utility model. Therefore, all equivalent changes made based on the shape, structure, and principle of this utility model without departing from its technical solution should be covered within the protection scope of this utility model.

Claims

1. An operating mechanism for a molded case circuit breaker, characterized in that, It includes a movable contact and a rotating shaft connected to each other, the rotating shaft being rotatably mounted on the side plate of the mechanism; It also includes the lower connecting rod, connecting rod shaft, upper connecting rod, main spring, and closing lever; One end of the lower connecting rod is connected to the rotating shaft, and the other end of the lower connecting rod is mounted on the connecting rod shaft; One end of the upper connecting rod is connected to the connecting rod shaft, and the other end of the upper connecting rod is mounted on the jump buckle assembly; One end of the main spring is connected to the connecting rod shaft, and the other end of the main spring is fixedly connected to the closing lever, which is mounted on the side plate of the mechanism.

2. The operating mechanism of a molded case circuit breaker as described in claim 1, characterized in that, The jump buckle assembly includes a jump buckle plate, and a jump buckle shaft is installed at the middle position of the jump buckle plate. The jump buckle shaft is inserted into the end of the upper connecting rod.

3. The operating mechanism of a molded case circuit breaker as described in claim 2, characterized in that, One end of the jump buckle plate is connected to the second jump buckle shaft, which is installed on the side plate of the mechanism. The end of the jump buckle plate near the second jump buckle shaft abuts against or separates from the connecting rod shaft, and the end of the jump buckle plate away from the second jump buckle shaft is connected to a primary lock.

4. The operating mechanism of a molded case circuit breaker as described in claim 3, characterized in that, The primary latch is rotatably mounted on the side plate of the mechanism at its middle position. One end of the primary latch abuts against or separates from the jump latch plate, and the other end of the primary latch abuts against a traction rod, which is rotatably mounted on the side plate of the mechanism.

5. The operating mechanism of a molded case circuit breaker as described in claim 4, characterized in that, A traction rod return spring is connected between the traction rod and the side plate of the mechanism, and a primary lock return spring is connected between the primary lock and the side plate of the mechanism.

6. The operating mechanism of a molded case circuit breaker as described in claim 4, characterized in that, The limiting shaft is fixedly installed on the side plate of the mechanism, and the limiting shaft abuts against or separates from the primary lock and the traction rod.

7. The operating mechanism of a molded case circuit breaker as described in claim 2, characterized in that, The mechanism's side plate is fixedly mounted with a fixed shaft, which is located above the jump buckle plate and the upper connecting rod. The fixed shaft and the upper connecting rod are in rolling contact, and the fixed shaft and the jump buckle plate are in collision contact.

8. The operating mechanism of a molded case circuit breaker as described in claim 1, characterized in that, The end of the closing lever furthest from the main spring is fixedly connected to the handle.

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