Operating mechanism of molded case circuit breaker

Abstract

The invention 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. The novel operating mechanism is designed and applied to the molded case circuit breaker, the alternating current and direct current universal requirement is met, the modular horizontal mechanism is provided with the miniaturization characteristic, 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] The present invention relates to the technical field of circuit breakers, and in particular to an operating mechanism of a molded case circuit breaker. Background Art

[0002] As the voltage level increases, the insulation design of molded case circuit breakers becomes more stringent, and the space left for insulation design does not meet the demand. At the same time, the AC / DC universal platform design also requires more space points to fasten the arc extinguishing module (AC has a greater breaking energy, and insufficient fasteners can easily lead to shell disassembly and breaking failure). Therefore, it is necessary to redesign a new mechanism to adapt to the high voltage platform. Summary of the invention

[0003] The purpose of the present invention is to solve the technical problems existing in the background technology, and to this end, an operating mechanism of a molded case circuit breaker is provided.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0005] An operating mechanism of a molded case circuit breaker comprises a movable contact and a rotating shaft connected to each other, wherein the rotating shaft is rotatably mounted on a side plate of the mechanism;

[0006] It also includes a lower connecting rod, a connecting rod shaft, an upper connecting rod, a main spring and a 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 installed 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 installed 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, and the closing lever is installed on the side plate of the mechanism.

[0010] The following is a technical solution further defined by the present invention, wherein the jumper assembly comprises a jumper plate, a jumper shaft 1 is installed at the middle position of the jumper plate, and the jumper shaft 1 is inserted and installed with the end of the upper connecting rod. One end of the jumper plate is connected with a jumper shaft 2, and the jumper shaft 2 is installed on the side plate of the mechanism, the end of the jumper plate close to the jumper shaft 2 is abutted or separated from the connecting rod shaft, and the end of the jumper plate away from the jumper shaft 2 is connected with 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 is abutted or separated from the jumper plate, and the other end of the primary lock is abutted with a traction rod, and the traction rod is rotatably installed on the side plate of the mechanism.

[0011] The following is a technical solution further defined by the present invention: a traction rod reset spring is connected between the traction rod and the mechanism side plate, and a primary lock reset spring is connected between the primary lock and the mechanism side plate.

[0012] The following is a technical solution further defined in the present invention: a limiting shaft is fixedly installed on the side plate of the mechanism, and the limiting shaft is in contact with or separated from the primary lock and the traction rod.

[0013] The following is a technical solution further defined by the present invention, in which a fixed shaft is fixedly installed on the side plate of the mechanism, the fixed shaft is located above the trip plate and the upper connecting rod, and there is rolling contact between the fixed shaft and the upper connecting rod, and there is collision contact between the fixed shaft and the trip plate.

[0014] The following is a technical solution further defined in the present invention, wherein one end of the closing lever away from the main spring is fixedly connected to a handle.

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

[0016] The present invention designs a new operating mechanism for use in molded case circuit breakers to meet the universal requirements of AC and DC. It has a miniaturized modular horizontal mechanism, and the adapted circuit breaker has more space for insulation design. The overall structure is installed on the side panel of the mechanism, which is beneficial to improving space utilization, wherein the rotating shaft is installed on the side panel of the mechanism, which is beneficial to the positioning of the rotating shaft.

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of the handle in the present invention in the closing position;

[0020] Figure 2 It is a schematic diagram of the structure in which the handle is in the opening position and the moving contact is not opened in the present invention;

[0021] Figure 3 It is a structural schematic diagram of the present invention in which the handle is in the opening position and the moving contact is open;

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

[0023] Figure 5 It is a schematic diagram of the structure of the upper connecting rod and the jumper plate in the present invention;

[0024] Figure 6 It is a partial structural schematic diagram of the closing lock state in the present invention;

[0025] Figure 7 It is a partial structural schematic diagram of the initial stage of the tripping process in the present invention;

[0026] Figure 8 It is a partial structural schematic diagram of the tripping process in the present invention;

[0027] Fig. 9 It is a partial structural schematic diagram of the tripping and opening state in the present invention;

[0028] Fig.10 It is a partial structural schematic diagram of the tripping process in the present invention;

[0029] Fig.11 It is a schematic diagram of the structure in which the rotating shaft is installed on the side plate of the mechanism in the present invention;

[0030] Fig.12 It is a structural schematic diagram of the fixed shaft in the present invention;

[0031] Fig.13 It is a structural schematic diagram of the upper connecting rod in the present invention;

[0032] Fig.14 It is a structural schematic diagram of the connecting rod shaft in the present invention;

[0033] Fig.15 It is a structural schematic diagram of the primary lock buckle and the traction rod being reset in the present invention;

[0034] Fig.16 It is a partial structural schematic diagram of the jump buckle plate and the primary lock buckle in the present invention;

[0035] Fig.17 It is a schematic diagram of the structure of the jump buckle plate and the primary lock buckle in the present invention;

[0036] Fig.18 It is a partial structural schematic diagram of the tripping plate and the primary lock in the present invention;

[0037] Fig.19 It is a partial structural schematic diagram of the jump buckle plate and the primary lock buckle for re-fastening in the present invention;

[0038] Fig. 20 It is a structural schematic diagram of the jump button plate in the present invention;

[0039] Fig.21 It is a structural schematic diagram of a single lock buckle from one viewing angle in the present invention;

[0040] Fig. 22 is a structural schematic diagram of a one-step lock in the present invention from another perspective;

[0041] Fig.23 It is a schematic diagram of the structure in which the primary lock is installed on the side plate of the mechanism in the present invention;

[0042] Fig.24 It is a structural schematic diagram of the side plate of the mechanism in the present invention;

[0043] Fig.25 It is a structural schematic diagram of the traction plate in the present invention.

[0044] Reference numerals:

[0045] 1. Moving contact;

[0046] 2. Rotating shaft;

[0047] 3. Lower connecting rod;

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

[0049] 5. Closing lever;

[0050] 6. Handle;

[0051] 7. Jumper plate; 701. Jumper shaft mounting hole; 702. Connecting rod shaft limiting surface; 703. Upper connecting rod mounting hole; 704. One-time locking limit block; 705. One-time locking reset blocking feature surface; 706. One-time locking buckle buckle surface;

[0052] 8. One-time lock; 801. Reset blocking feature surface; 802. Jump buckle plate buckle surface; 803. One-time lock rotation center; 804. Limiting feature surface; 805. Buckle feature surface; 806. Buckle quantity limiting feature surface;

[0053] 9. Mechanism side plate; 901. Rotating shaft fixing pin mounting hole; 902. Jump buckle shaft second mounting hole; 903. Fixed shaft mounting hole; 904. Lever limit feature surface; 905. Drawbar mounting hole; 906. Limit shaft mounting hole; 907. One-time lock buckle mounting hole;

[0054] 10. Drawbar; 1001. Position limiting characteristic surface; 1002. One-time locking buckle buckle surface; 1003. Buckle quantity limiting characteristic surface; 1004. Rotation center hole; 1005. Electromagnet striking characteristic surface;

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

[0056] 12. Jump button axis 2;

[0057] 13. Fixed shaft; 1301. Side plate fixing surface; 1302. Upper connecting rod and jump buckle matching surface;

[0058] 14. Jump button axis 1;

[0059] 15. One-time lock reset spring; 1501. One-time lock reset spring hanging point 1; 1502. One-time lock reset spring hanging point 2;

[0060] 16. Drawbar reset spring; 1601. Drawbar reset spring hanging point one; 1602. Drawbar reset spring hanging point two;

[0061] 17. Limit axis. DETAILED DESCRIPTION

[0062] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0063] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

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

[0065] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0066] like Figure 1-25 As shown, this embodiment provides an operating mechanism of a molded case circuit breaker, which is mainly composed 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 tripping plate 7, a primary lock 8, a traction rod 10, a connecting rod shaft 11, a tripping shaft 2 12, a fixed shaft 13, a tripping shaft 14 and a limit shaft 17.

[0067] like Fig.12 As shown, the fixed shaft 13 is symmetrically arranged: its two end portions are both side plate fixing surfaces 1301, and the two end portions of the fixed shaft 13 are installed on the mechanism side plates 9 on both sides; the middle portion thereof is set as an upper connecting rod and jump-fastening matching surface 1302, and the middle portion of the fixed shaft 13 is used to contact the upper connecting rod 4 and the jump-fastening plate 7.

[0068] like Fig.13 As shown, the upper connecting rod 4 is provided with an upper connecting rod arc surface 401, a connecting rod shaft connection hole 402 and a jumper shaft first installation hole 403. Among them, the upper connecting rod arc surface 401 is used for the upper connecting rod 4 to contact with the fixed shaft 13; the connecting rod shaft connection hole 402 is used to install the connecting rod shaft 11 so that the upper connecting rod 4 is hingedly arranged at the middle position of the connecting rod shaft 11; the jumper shaft first installation hole 403 is used to install the jumper shaft 14 and insert the upper connecting rod 4 and the jumper plate 7 through the jumper shaft 14.

[0069] like Fig.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 jumper plate limiting matching surface 1103 and a main spring hanging point 1104. Among them, the lower connecting rod mounting surface 1101 is used to install the lower connecting rod 3, and this embodiment has two symmetrical lower connecting rods 3; the upper connecting rod mounting surface 1102 is used to install the upper connecting rod 4, and this embodiment has two symmetrical upper connecting rods 4; the jumper plate limiting matching surface 1103 is used to contact the jumper plate 7; the main spring hanging point 1104 is used for the hook-type connection of the main spring end.

[0070] like Fig. 20As shown, the jumper plate 7 is provided with a jumper 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 buckle surface 706. Among them, the jumper shaft mounting hole 701 is used to install the jumper shaft 12 so that the end of the jumper plate 7 is in the middle position of the jumper shaft 12; the connecting rod shaft limiting surface 702 is used to contact with the connecting rod shaft 11 to limit the position; the upper connecting rod mounting hole 703 is used to install the jumper shaft 14 and make the jumper plate 7 and the upper connecting rod 4 insert-installed through the jumper shaft 14; the primary lock limiting block 704 is used to limit the primary lock 8 to prevent it from flipping over again; the primary lock reset blocking feature surface 705 is used for the reset blocking limit of the primary lock 8; the primary lock buckle buckle surface 706 is used for the buckle fit between the jumper plate 7 and the primary lock 8.

[0071] like Fig.21 and 22 As shown, the primary lock 8 is provided with a reset blocking feature surface 801, a jump plate buckle surface 802, a primary lock rotation center 803, a limit feature surface 804, a buckle feature surface 805, and a buckle amount limiting feature surface 806. Among them, the reset blocking feature surface 801 is used for blocking and limiting the primary lock 8 with the jump plate 7 when resetting; the jump plate buckle surface 802 is used for the buckle fit between the primary lock 8 and the jump plate 7; the primary lock rotation center 803 is used for the primary lock 8 to be rotatably mounted on the mechanism side plate 9; the limit feature surface 804 is used to limit the rotation angle of the primary lock 8 and contact with the limit shaft 17; the buckle feature surface 805 is used for the buckle fit between the primary lock 8 and the traction rod 10; the buckle amount limiting feature surface 806 is used for the buckle area setting between the primary lock 8 and the traction rod 10.

[0072] like Fig.24 As shown, the mechanism side plate 9 is provided with a shaft fixing pin mounting hole 901, a tripping shaft second mounting hole 902, a fixed shaft mounting hole 903, a lever limiting characteristic surface 904, a traction rod mounting hole 905, a limiting shaft mounting hole 906, and a one-time lock mounting hole 907. Among them, the shaft fixing pin mounting hole 901 is used to install the shaft fixing pin (the shaft fixing pin is fixedly connected to the center of the shaft 1) so that the shaft 1 is rotatably mounted on the mechanism side plate 9; the tripping shaft second mounting hole 902 is used to rotatably mount the end of the tripping shaft second 12; the fixed shaft mounting hole 903 is used to rotatably mount the end of the fixed shaft 13; the lever limiting characteristic surface 904 is used to limit the rotation position of the closing lever 5; the traction rod mounting hole 905 is used to rotatably mount the traction rod 10; the limiting shaft mounting hole 906 is used to rotatably mount the limiting shaft 17; and the one-time lock mounting hole 907 is used to rotatably mount the one-time lock 8.

[0073] like Fig.25As shown, the traction rod 10 is provided with a limited position characteristic surface 1001, a primary lock buckle buckle surface 1002, a buckle amount limiting characteristic surface 1003, a rotation center hole 1004 and an electromagnet striking characteristic surface 1005. Among them, the limited position characteristic surface 1001 is used to limit the rotation angle of the traction rod 10 and is in contact with the limited position shaft 17; the primary lock buckle buckle surface 1002 is used for the buckle fit between the traction rod 10 and the primary lock buckle 8; the buckle amount limiting characteristic surface 1003 is used for setting the buckle area between the traction rod 10 and the primary lock buckle 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 characteristic surface 1005 is used for the electromagnet striking to rotate the traction rod 10.

[0074] like Fig.15 As shown, the primary lock 8 is reset by using the primary lock reset spring 15, and the two ends of the primary lock reset spring 15 are respectively hooked on the primary lock reset spring hanging point 1501 and the primary lock reset spring hanging point 2 1502. Among them, the primary lock reset spring hanging point 1501 is set on the primary lock 8, and the primary lock reset spring hanging point 2 1502 is set on the mechanism side plate 9.

[0075] The traction rod 10 is reset by using a traction rod reset spring 16, and the two ends of the traction rod reset spring 16 are respectively hooked on the traction rod reset spring hanging point 1 1601 and the traction rod reset spring hanging point 2 1602. Among them, the traction rod reset spring hanging point 1 1601 is set on the traction rod 10, and the traction rod reset spring hanging point 2 1602 is set on the mechanism side plate 9.

[0076] like Fig.11 As shown, the moving contact 1 is fixedly mounted on the radial outer side wall of the rotating shaft 2, and the center position of the rotating shaft 2 is rotatably mounted on the mechanism side plate 9. The rotating shaft 2 is mounted on the mechanism side plate 9, which is conducive to the positioning of the rotating shaft 2. Compared with the traditional solution in which the rotating shaft 2 is mounted on the housing, the dimension chain increases two key dimensions, which is not conducive to the positioning of the rotating shaft 2 and also increases the product manufacturing and testing costs.

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

[0078] A jumper shaft 14 is installed in the middle of the jumper plate 7, and the jumper shaft 14 is inserted into the jumper shaft 1 installation hole 403 at the end of the upper connecting rod 4. One end of the jumper plate 7 is fixedly connected to the middle of the jumper shaft 2 12, one end of the jumper shaft 2 12 is rotatably mounted on the mechanism side plate 9, and the other end of the jumper shaft 2 12 is connected to an accessory.

[0079] One end of the tripping plate 7 close to the second tripping shaft 12 is in contact with or separated from the connecting rod shaft 11 , and one end of the tripping plate 7 away from the second tripping shaft 12 is connected with a primary lock 8 .

[0080] The middle position of the primary lock 8 is rotatably mounted on the mechanism side plate 9 through the primary lock rotation center 803, one end of the primary lock 8 is abutted or separated from the jump plate 7 through the jump plate buckle surface 802 (i.e., a buckle connection is performed), and the other end of the primary lock 8 is abutted with the traction rod 10 through the buckle feature surface 805, and the traction rod 10 is rotatably mounted on the mechanism side plate 9 through the rotation center hole 1004. A traction rod reset spring 16 is connected between the traction rod 10 and the mechanism side plate 9, and a primary lock reset spring 15 is connected between the primary lock 8 and the mechanism side plate 9. The mechanism side plate 9 is fixedly mounted with a limit shaft 17, and the limit shaft 17 is abutted or separated from the primary lock 8 and the traction rod 10. The mechanism side plate 9 is fixedly mounted with a fixed shaft 13, and the fixed shaft 13 is above the jump plate 7 and the upper connecting rod 4, and the fixed shaft 13 is in rolling contact with the upper connecting rod 4, and the fixed shaft 13 is in collision contact with the jump plate 7.

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

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

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

[0084] like Figure 4 As shown, the fixing of the upper connecting rod 4 and the trip plate 7 is changed from the traditional two-side cantilever beam solution to a central solution. Among them: the trip plate 7 is fixed with the rotation center by the trip shaft 2 12 (more stable and balanced); the upper connecting rod 4 is inserted on the trip shaft 14. In the A position, the end of the trip shaft 2 12 is connected to the accessory, and the trip plate 7 rotates to trigger the accessory. In the B position, the connecting rod is limited in the closed state, and the trip plate 7 is in contact with the connecting rod shaft 11.

[0085] like Figure 5 As shown, at the C position, the upper connecting rod 4 and the jumper plate 7 are installed in an inserting manner.

[0086] like Figure 6 As shown, in the closed lock state, due to the action of the main spring, the trip plate 7 has a tendency to rotate counterclockwise around the rotation center (trip axis 2 12); under the action of the main spring tension (the double-sided arrow indicates tension), the upper connecting rod 4 has a tendency to rotate clockwise around the trip axis 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 in the middle indicates the boundary of a partial screenshot of the overall structure.

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

[0088] 1. Open the lock 8 counterclockwise once;

[0089] 2. The trip plate 7, the upper connecting rod 4 and the connecting rod shaft 11 rotate counterclockwise around the trip plate shaft 2 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 trip plate 7);

[0090] 3. After rotating a certain angle, arrive 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 tripping shaft 14, pushing the connecting rod shaft 11 away from the tripping plate 7.

[0092] At the D position, at the beginning of the tripping process, the tripping plate 7 and the upper connecting rod 4 move closely together under the action of the spring force. Figure 7 The dashed box in the middle indicates the boundary of a partial screenshot of the overall structure.

[0093] like Figure 8 As shown, in position E, the upper connecting rod 4 is pushed, and the connecting rod shaft 11 is separated from the limit of the trip plate 7. Figure 8 The dotted box in the middle indicates the boundary of a partial screenshot of the overall structure. According to the motion trajectory of the trip plate 7 and the upper connecting rod 4, the arc surface of the upper connecting rod 4 is designed to ensure the contact between the fixed shaft 13 and the upper connecting rod 4, so that there is no relative sliding during the tripping movement, reducing friction loss (rolling friction instead of sliding friction) and improving the efficiency of the mechanism.

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

[0095] like Fig.10As shown, during the release process, the thrust F1 exerted by the fixed shaft 13 on the upper connecting rod 4 will produce a tendency to separate the upper connecting rod 4 from the tripping shaft 14. Under collision conditions, there is 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 tripping shaft 14. Fig.10 The dashed box in the middle indicates the boundary of a partial screenshot of the overall structure. F1 indicates the thrust, and F0 indicates the contraction force of the main spring.

[0096] like Fig.11 As shown, at position G, the rotating shaft 2 is installed on the mechanism side plate 9, which is beneficial to the positioning of the rotating shaft 2 (if installed on the housing, the dimension chain adds two key dimensions, which is not conducive to the positioning of the rotating shaft and also increases the product manufacturing and testing costs).

[0097] like Fig.16 As shown, the H1 position is the buckle position between the jump plate 7 and the primary lock 8; the H2 position is the buckle position between the primary lock 8 and the traction plate 10; and the H3 position is the buckle amount limit. The buckle surface of the jump plate 7 is in contact with the chamfered portion of the primary lock 8 (approximately line-surface contact), which can ensure the stability of the force F2 acting on the primary lock 8 (including the magnitude and direction of the force). The traction rod 10 limits the counterclockwise flipping tendency of the primary lock 8 (H2 position), and the primary lock 8 limits the clockwise movement tendency of the traction rod 10 (at the H3 position, the buckle amount is limited). Among them, Fig.16 The dashed box in the middle indicates the boundary of a partial screenshot of the overall structure.

[0098] Fig.18 As shown, the tripping process: the traction rod 10 rotates counterclockwise to release the primary lock 8, the primary lock 8 opens counterclockwise, releases the trip plate 7, and completes the tripping action of the operating mechanism. In the J1 position, the primary lock 8 avoids the trip plate 7 from opening; in the J2 position, the limit shaft 17 limits the primary lock 8; in the J3 position, the limit shaft 17 limits the traction rod 10; in the J4 position, the traction rod 10 avoids the primary lock 8 from flipping. Among them, Fig.18 The dashed box in the middle indicates the boundary of a partial screenshot of the overall structure.

[0099] like Fig.19 As shown, during the re-locking process, the rotation angle of the trip plate 7 around the tripping axis 12 is larger, resulting in the buckle surface being unable to limit the clockwise flipping of the primary lock 8 under the action of the primary lock reset spring 15 (excessive flipping may cause jamming), and a limiting feature is added to the trip plate 7 to prevent the primary lock 8 from jamming. Fig.19 The double-headed arrow in the middle indicates the contraction force of the primary lock reset spring 15, and the dotted frame indicates the boundary of a partial screenshot of the overall structure.

[0100] like Fig.23As shown, at the K position, the primary lock buckle 8 is inserted into the mechanism side plate 9.

[0101] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the above disclosed methods and technical contents without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, all equivalent changes made according to the shape, structure and principle of the present invention without departing from the content of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. An operating mechanism of a molded case circuit breaker, characterized in that: It includes a moving contact and a rotating shaft connected to each other, and the rotating shaft is rotatably mounted on the side plate of the mechanism; It also includes a lower connecting rod, a connecting rod shaft, an upper connecting rod, a main spring and a 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 installed 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 installed 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, and the closing lever is installed on the side plate of the mechanism.

2. The operating mechanism of a molded case circuit breaker according to claim 1, characterized in that: The jump button assembly comprises a jump button plate, a jump button shaft 1 is installed at the middle position of the jump button plate, and the jump button shaft 1 is inserted into the end of the upper connecting rod.

3. The operating mechanism of a molded case circuit breaker according to claim 2, characterized in that: One end of the jump-clip plate is connected to a jump-clip shaft 2, and the jump-clip shaft 2 is mounted on a side plate of the mechanism. The end of the jump-clip plate close to the jump-clip shaft 2 is in contact with or separated from the connecting rod shaft, and the end of the jump-clip plate away from the jump-clip shaft 2 is connected to a primary lock.

4. The operating mechanism of a molded case circuit breaker according to claim 3, characterized in that: The middle position of the primary lock is rotatably mounted on the side plate of the mechanism, one end of the primary lock is in contact with or separated from the jump plate, and the other end of the primary lock is in contact with a traction rod, which is rotatably mounted on the side plate of the mechanism.

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

6. The operating mechanism of a molded case circuit breaker according to claim 4, characterized in that: The side plate of the mechanism is fixedly mounted with a limiting shaft, and the limiting shaft is in contact with or separated from the primary lock buckle and the traction rod.

7. The operating mechanism of a molded case circuit breaker according to claim 2, characterized in that: The side plate of the mechanism is fixedly mounted with a fixed shaft, the fixed shaft is located above the trip plate and the upper connecting rod, and the fixed shaft is in rolling contact with the upper connecting rod, and the fixed shaft is in collision contact with the trip plate.

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

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