An operating mechanism and switchgear

Abstract

The utility model relates to an operating mechanism and switch equipment, and the operating mechanism includes support, buckle, lever, escapement component, upper connecting rod, lower connecting rod and main tension spring. The support contains limit position axle and both sides support wall, and the wall is equipped with lever, buckle rotation center, the second rotation department of buckle is connected buckle rotation center, and has upper connecting rod rotation center, the first rotation department of lever is connected lever rotation center, and again buckle axle contacts again buckle surface. The lock catch and traction rod of escapement component all turn relative to the support, and again buckle and buckle surface realize again buckle and release. The third rotation department of upper connecting rod is connected buckle upper connecting rod rotation center, and has second pin part, lower connecting rod rotation center, and the fourth rotation department of lower connecting rod one end is connected lower connecting rod rotation center, and the other end has contact head support rotation center. The both ends of main tension spring hang ear hook first, second pin part, and exert tension on lever and upper connecting rod. The utility model discloses operating mechanism realizes the preposition of upper connecting rod and lower connecting rod, so that arc extinguishing system can be located below operating mechanism and upper connecting rod and lower connecting rod.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, specifically to an operating mechanism and a switching device. Background Technology

[0002] With the increasing demand for photovoltaic DC high-voltage switching equipment, the traditional layout of molded case circuit breakers is becoming increasingly limited. The operating mechanism of traditional molded case circuit breakers is located on the upper side of the contact system. With the current arc extinguishing technology of low-voltage switching equipment, the number of arc extinguishing grids must be increased to improve the arc voltage for DC high-voltage arc extinguishing. However, increasing the number of arc extinguishing grids in the traditional layout of molded case circuit breakers will increase the height of the circuit breaker.

[0003] Patent CN116581003A discloses a moving contact operating mechanism on a circuit breaker. This mechanism includes a latch, a moving contact seat, and a moving contact. Both the latch and the moving contact are rotatably mounted on the moving contact seat. The moving contact and the moving contact seat are linked by a torsion spring. The moving contact or the moving contact seat has a torsion spring mounting protrusion on its side. The torsion spring is mounted on the torsion spring mounting protrusion, and its two torsion arms respectively abut against the moving contact seat and the moving contact. The moving contact seat also has a latch spring for resetting the latch. The latch spring and the latch are mounted together on the same side of the moving contact seat, and both ends of the latch spring abut against the moving contact seat and the latch respectively. In the above patent, the moving contact is placed below the operating mechanism, which limits the increase in space for the arc extinguishing system and makes it impossible to increase the arc voltage by increasing the number of arc extinguishing grids without changing the circuit breaker height. Utility Model Content

[0004] The purpose of this utility model is to overcome at least one of the defects of the prior art and provide an operating mechanism and switching device. The objective of this utility model can be achieved through the following technical solutions: One of the objectives of this utility model is to provide an operating mechanism, comprising: The bracket includes a limiting shaft and a pair of bracket walls on both sides of the limiting shaft. A pair of lever rotation centers and a pair of fastener rotation centers are respectively provided on the pair of bracket walls. The fastener includes a fastener body, wherein the fastener body is provided with a pair of second rotating parts and a pair of upper connecting rod rotation centers, and the pair of second rotating parts are respectively rotatably connected to the pair of fastener rotation centers; A lever includes a lever body, on which a pair of locking pins and a pair of first rotating parts are provided. The first rotating parts can rotate in the rotation center of the pair of levers, and the locking pins can contact the pair of locking surfaces. The escapement component includes a latch and a pull rod, the latch and the pull rod being rotatable relative to the bracket, and the latch engaging with the latching surface to achieve re-locking and release; The upper connecting rod includes an upper connecting rod body, on which a second pin, a pair of third rotating parts and a pair of lower connecting rod rotation centers are provided. The third rotating parts are rotatably connected to the upper connecting rod rotation centers, so that the upper connecting rod can rotate relative to the fastener. The lower connecting rod includes a pair of connecting plates. One end of the pair of connecting plates is provided with a pair of fourth rotating parts and the other end is provided with a pair of contacts supporting the rotation center. The pair of fourth rotating parts are rotatably connected to the rotation center of the pair of lower connecting rods, so that the lower connecting rod can rotate relative to the upper connecting rod. The operating mechanism also includes a main tension spring, with its two ends hooked onto the first pin and the second pin respectively, to apply tension to the lever and the upper connecting rod.

[0005] Furthermore, the fastener body includes a first fastener wall and a pair of second fastener walls disposed on both sides of the first fastener wall. The pair of second fastener walls are provided with a pair of second rotating parts. One side of the pair of second fastener walls extends outward to form a pair of re-fastening surfaces. The rotation center of the pair of upper connecting rods is located on the pair of re-fastening surfaces. The other side of the pair of second fastener walls extends outward to form a pair of second limiting surfaces and a pair of third limiting surfaces. The side of the pair of second fastener walls opposite to the first fastener wall extends outward to form a pair of first limiting surfaces. The side of the first fastener wall opposite to the pair of second fastener walls is provided with a fastening surface. The pair of second rotating parts are rotatably connected to the pair of fastener rotation centers respectively.

[0006] Furthermore, the extension lines of the second and third limiting surfaces on the same side pass through the rotation center of the upper connecting rod on the same side.

[0007] Furthermore, the first limiting surface of the fastener is used to contact the limiting shaft of the bracket when the operating mechanism is disengaged, so as to limit the rotation range of the fastener when it is disengaged.

[0008] Furthermore, the lever body includes a first lever wall and a pair of second lever walls disposed on both sides of the first lever wall. The portion of the pair of second lever walls near the first lever wall is provided with a re-locking shaft. The side of the pair of second lever walls opposite to the first lever wall is provided with a pair of first rotating parts. The side of the first lever wall opposite to the pair of second lever walls is provided with a first pin. The first rotating parts can rotate around the rotation center of the pair of levers. The re-locking shaft can contact the pair of re-locking surfaces.

[0009] Furthermore, the re-fastening surface of the fastener is used to contact the re-fastening shaft of the lever when the operating mechanism re-fastens, so that when the lever rotates, the fastener can be driven to rotate through the re-fastening shaft.

[0010] Furthermore, the lever also includes a handle, which is fixedly connected to the lever, and the operator can rotate the lever relative to the support by turning the handle.

[0011] Furthermore, the upper connecting rod body includes a first upper connecting rod wall and a pair of second upper connecting rod walls on both sides of the first upper connecting rod wall. A second pin is provided between the pair of second upper connecting rod walls to connect the two. A pair of third rotating parts and a pair of lower connecting rod rotation centers are also provided on the pair of second upper connecting rod walls. The third rotating parts are rotatably engaged with the upper connecting rod rotation centers so that the upper connecting rod can rotate relative to the fastener. The second pin of the upper connecting rod is used to contact the second limiting surface of the latch when the operating mechanism is closed, and to contact the third limiting surface of the latch when the operating mechanism is re-engaged or disengaged, so as to realize the positioning of the upper connecting rod in different states.

[0012] Furthermore, the lower connecting rod body includes a pair of connecting plates arranged opposite each other. One end of the pair of connecting plates is provided with a pair of fourth rotating parts and the other end is provided with a pair of contact supports for the rotation center. The pair of fourth rotating parts are rotatably connected to the pair of lower connecting rod rotation centers, so that the lower connecting rod can rotate relative to the upper connecting rod.

[0013] The second objective of this utility model is to provide a switching device, including the operating mechanism described above, as well as a contact system, a stationary contact, and an arc extinguishing system; The contact system includes a moving contact, a contact support, a fifth rotating part, and a sixth rotating part. The moving contact extends from inside the contact support. The fifth rotating part of the contact support rotates in conjunction with the rotation center of the contact support of the lower connecting rod, so that the contact system can rotate around the sixth rotating part.

[0014] Compared with the prior art, the present invention has the following beneficial effects: (1) This utility model provides an operating mechanism that realizes the front-mounted upper and lower connecting rods; (2) This utility model provides a switching device. Because the upper and lower connecting rods are positioned in front of the device, the arc extinguishing system is located below the operating mechanism and the upper and lower connecting rods, thereby increasing the space of the arc extinguishing system. Under the premise that the height of the circuit breaker remains unchanged, the arc voltage can be increased by increasing the number of arc extinguishing grid plates. Attached Figure Description

[0015] Figure 1 This is a diagram showing the arrangement of the switchgear in this utility model; Figure 2 This is a structural diagram of the support frame in this utility model; Figure 3This is a structural diagram of the lever handle in this utility model; Figure 4 This is a diagram of the lever structure in this utility model; Figure 5 This is one of the structural diagrams of the fastener in this utility model; Figure 6 This is the second structural diagram of the fastener in this utility model; Figure 7 This is the third structural diagram of the fastener in this utility model; Figure 8 This is a structural diagram of the upper connecting rod in this utility model; Figure 9 This is a structural diagram of the lower connecting rod in this utility model; Figure 10 This is a structural diagram of the contact system in this utility model; Figure 11 This is a diagram showing the disengaged state of the operating mechanism in this utility model; Figure 12 This is a diagram showing the re-engagement state of the operating mechanism in this utility model; Figure 13 This is a diagram showing the re-engagement state of the operating mechanism in this utility model; Figure 14 This is a diagram showing the closed state of the operating mechanism in this utility model; Figure 15 This is a bottom view of the operating mechanism in this utility model; Figure 16 This is a schematic diagram of the existing operating mechanism. Figure 17 This is a schematic diagram of the operating mechanism in this utility model; Figure 18 This is one of the schematic diagrams of the escapement component in this utility model; Figure 19 This is one of the schematic diagrams of the escapement component in this utility model; The numbers in the diagram are as follows: 1-Operating mechanism; 2-Lever; 21-First rotating part; 22-Handle; 23-Re-locking shaft; 24-Main tension spring; 25-First pin; 3-Bracket; 31-Lever rotation center; 32-Snap fastener rotation center; 33-Limit shaft; 34-Lock rotation center; 4-Snap fastener; 41-Second rotating part; 42-Snap fastener surface; 43-Second snap fastener surface; 44-First limiting surface; 45-Second limiting surface; 46-Third limiting surface; 47-Upper connecting rod rotation center; 5-Upper connecting rod; 51-Second pin; 52-Third rotating part; 53-Lower connecting rod rotation center; 6-Lower connecting rod; 61-Fourth rotating part; 62-Contact support rotation center; 7-Escapement assembly; 71-Lock; 72-Traction rod; 73-Torsion spring; 74-First contact surface; 75-Second contact surface; 76-Traction rod rotation center; 8-Contact system; 81-Moving contact; 82-Contact support; 83-Fifth rotating part; 84-Sixth rotating part; 9-Stationary contact; 10-Arc extinguishing system. Detailed Implementation

[0016] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. These embodiments are implemented based on the technical solution of the present invention, providing detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments.

[0017] Example 1 This embodiment provides an operating mechanism, including a bracket 3, a latch 4, a lever 2, an escapement component 7, an upper connecting rod 5, and a lower connecting rod 6; See Figure 2 The bracket 3 includes a limiting shaft 33 and a pair of bracket walls on both sides of the limiting shaft 33. A pair of lever rotation centers 31 and a pair of fastener rotation centers 32 are respectively provided on the pair of bracket walls. Specifically, the pair of lever rotation centers 31 are two grooves respectively provided on the pair of bracket walls; the pair of fastener rotation centers 32 are two through holes respectively provided on the pair of bracket walls.

[0018] Referring to 5-7, the fastener 4 includes a fastener body, which includes a first fastener wall and a pair of second fastener walls on both sides of the first fastener wall. The pair of second fastener walls have a pair of second rotating portions 41. One side of the pair of second fastener walls extends outward to form a pair of re-fastening surfaces 43. The rotation centers 47 of the pair of upper connecting rods are located on the pair of re-fastening surfaces 43. The other side of the pair of second fastener walls extends outward to form a pair of second limiting surfaces 45 and a pair of third limiting surfaces 46. The side of the pair of second fastener walls opposite to the first fastener wall extends outward to form a pair of first limiting surfaces 44. The side of the first fastener wall opposite to the pair of second fastener walls has a fastening surface 42. The pair of second rotating portions 41 are rotatably connected to the pair of fastener rotation centers 32. The pair of second rotating parts 41 are two connecting holes respectively provided on the walls of the pair of second buckle plates, and the rotation center of the upper connecting rod 47 is two connecting protrusions respectively provided on the pair of re-fastening surfaces 43; the extension lines of the second limiting surface 45 and the third limiting surface 46 on the same side pass through the rotation center 47 of the upper connecting rod on the same side. The first limiting surface 44 of the buckle plate 4 is used to contact the limiting shaft 33 of the bracket 3 when the operating mechanism is disengaged, so as to limit the rotation range of the buckle plate 4 when it is disengaged.

[0019] See Figure 2-3 The lever 2 includes a lever body, which includes a first lever wall and a pair of second lever walls on both sides of the first lever wall. The portion of each pair of second lever walls near the first lever wall has a re-locking shaft 23. The side of each pair of second lever walls opposite to the first lever wall has a pair of first rotating parts 21. The side of each first lever wall opposite to the pair of second lever walls has a first pin 25. The first rotating parts 21 are rotatable around the rotation center 31 of the pair of levers. The re-locking shaft 23 can contact the pair of re-locking surfaces 43. The re-locking surface 43 of the latch 4 is used to contact the re-locking shaft 23 of the lever 2 when the operating mechanism re-locks, so that when the lever 2 rotates, the latch 4 can be rotated via the re-locking shaft 23. Optionally, the lever 2 also includes a handle 22, which is fixedly connected to the lever 2. Rotating the handle 22 causes the lever 2 to rotate relative to the bracket 3.

[0020] See Figure 8 The upper connecting rod 5 includes an upper connecting rod body, which includes a first upper connecting rod wall and a pair of second upper connecting rod walls on both sides of the first upper connecting rod wall. A second pin 51 connecting the two second upper connecting rod walls is provided. A pair of third rotating parts 52 and a pair of lower connecting rod rotation centers 47 are also provided on the pair of second upper connecting rod walls. The third rotating parts 52 are rotatably engaged with the upper connecting rod rotation centers 47, allowing the upper connecting rod 5 to rotate relative to the latching piece 4. The second pin 51 of the upper connecting rod 5 is used to contact the second limiting surface 45 of the latching piece 4 when the operating mechanism is closed, and to contact the third limiting surface 46 of the latching piece 4 when the operating mechanism is re-engaged or disengaged, so as to realize the positioning of the upper connecting rod 5 in different states. The pair of lower connecting rod rotation centers 53 are two connecting holes respectively provided on the pair of second upper connecting rod walls, and the pair of third rotating parts 52 are two connecting grooves respectively provided on the pair of second upper connecting rod walls.

[0021] See Figure 9 The lower connecting rod 6 includes a pair of connecting plates arranged opposite each other. One end of the pair of connecting plates is provided with a pair of fourth rotating parts 61 and the other end is provided with a pair of contact support rotation centers 62. The pair of fourth rotating parts 61 are rotatably connected to the pair of lower connecting rod rotation centers 53, so that the lower connecting rod 6 can rotate relative to the upper connecting rod 5.

[0022] See Figure 11-14 The operating mechanism also includes a main tension spring 24, with the two ends of the main tension spring 24 hooked onto the first pin 25 and the second pin 51 respectively, to apply tension to the lever 2 and the upper connecting rod 5.

[0023] See Figure 18-19The operating mechanism also includes an escapement component 7, which is a prior art technology, including a latch 71, a traction rod 72 and a torsion spring 73. The latch 71 and the traction rod 72 can rotate relative to the bracket 3 respectively. The latch 71 cooperates with the latching surface 42 to achieve re-locking and release. When the circuit is closed, the latch 4 is connected to the upper connecting rod 5. The second pin 51 of the upper connecting rod 5 and the lever 2 are provided with tension by the main tension spring 24. The latch 4 has a counterclockwise rotational torque. The latch 71 and the traction rod 72 are rotatably connected to the bracket. The torsion spring 73 provides torque for the latch 71 and the traction rod 72 around their respective rotation centers. The latch 4 and the latch 73 are in contact with the first contact surface 74. The latch 4 gives the latch 71 a clockwise counter-torque. The traction rod 72 and the latch 71 are in contact with the second contact surface 75. The latch 71 gives the traction rod 72 a clockwise torque. When the traction rod 72 rotates clockwise, the second contact surface 75 disengages, causing the latch 41 to rotate clockwise, which causes the first contact surface 74 to disengage. The latch 4 will rotate counterclockwise due to the force of the main tension spring 24, pulling up the upper connecting rod 6 and completing the disengagement action.

[0024] Figure 11 The operating mechanism is in the disengaged state. Figure 12 and 13 The operating mechanism is now in a locked state. Figure 14 The operating mechanism is in the closed state. The specific implementation process is as follows: Disengagement to re-engagement state: The operator drives the lever 2 to rotate clockwise around the lever rotation center 31 by operating the handle 22. The re-engagement shaft 23 on the lever 2 contacts the re-engagement surface 43 on the latch 4, causing the latch 4 to rotate clockwise around the latch rotation center 32. The latch surface 42 of the latch 4 is finally restricted by the escapement component 7, completing the re-engagement. During the re-engagement process, the third limiting surface 46 of the latch 4 will drive the second pin 51 and the upper connecting rod 5 to rotate clockwise around the upper connecting rod rotation center 47, thereby lengthening the main tension spring 24 to store energy for the operating mechanism 1.

[0025] To re-close the circuit: The operator operates handle 22 to rotate lever 2 counterclockwise around lever rotation center 31. One end of main tension spring 24 rotates along with the first pin 25 until the force exerted by main tension spring 24 on upper connecting rod 5 passes the dead point. Then, it rotates upper connecting rod 5 clockwise around upper connecting rod rotation center 47 until the second pin 51 contacts the second limiting surface 45. Upper connecting rod 5 then drives contact system 8 to rotate counterclockwise around the sixth rotating part 84 via lower connecting rod 6 to close the circuit. The re-closing state is the opposite of the re-closing state, except that the main tension spring drives upper connecting rod 5 to rotate counterclockwise around upper connecting rod rotation center 47 until the second pin 51 contacts the third limiting surface 46. Furthermore, during the re-fastening process, lever 2 drives fastener 4 to rotate clockwise. When it descends below the first contact surface 74, latch 71 engages with the fastener due to the counterclockwise torque provided by torsion spring 73. Simultaneously, traction rod 72 engages with latch 71 due to the counterclockwise torque provided by torsion spring 73, thus completing the re-fastening process. When the circuit is closed to the tripped state, after the escapement component 7 releases the latch 4, the main tension spring 24 will pull the latch 4 and the upper connecting rod 5 upward together. At this time, the latch 4 rotates counterclockwise around the latch rotation center 32 until the first limiting surface 44 contacts the limiting shaft 33. The upper connecting rod 5 rotates counterclockwise around the upper connecting rod rotation center 47 until the second pin 51 contacts the third limiting surface 46. At this time, the upper connecting rod 5 will drive the contact system 8 to trip clockwise around the sixth rotating part 84 through the lower connecting rod 6.

[0026] Example 2 See Figures 2 to 4 As shown, lever 2 is fixedly connected to handle 22, bracket 3 is fixed, and lever 2 rotates relative to bracket 3: lever 2 has a first rotating part 21, bracket 3 has a lever rotation center 31, and the first rotating part 2 and lever rotation center 31 rotate in coordination.

[0027] See Figure 2 and Figure 6 As shown, the fastener 4 rotates relative to the bracket 3: the fastener 4 has a second rotating part 41, and the bracket 3 has a fastener rotation center 32; the second rotating part 41 and the lever rotation center 32 rotate in coordination; see also Figure 5 As shown, the fastener 4 has a first limiting surface 44, see [reference]. Figure 11 As shown, it contacts the limiting shaft 33 on the bracket 3 when it is released.

[0028] See Figure 11 As shown, the escapement component 7 includes a latch 71 and a pull rod 72. The escapement component 7 is based on existing technology: the latch 71 and the pull rod 72 rotate relative to the bracket 3. The main function of the escapement component 7 is to restrict and release the latch plate 4 to achieve the purpose of re-locking and release.

[0029] See Figure 5 and Figure 6 As shown, the latch plate 4 has a latching surface 42, which cooperates with the escapement component 7 to perform the functions of re-fastening and disengaging. The latch plate 4 also has a re-fastening surface 43. (See attached image.) Figure 12 As shown, when re-fastening, the re-fastening surface 43 contacts the re-fastening shaft 23 on the lever 2.

[0030] See Figure 5 and Figure 8 As shown, the upper connecting rod 5 rotates relative to the fastener 4: the upper connecting rod 5 has a third rotating part 52, and the fastener 4 has a rotation center 47 of the upper connecting rod; the third rotating part 52 and the rotation center 47 of the upper connecting rod rotate in coordination; see also Figure 7 As shown, the fastener 4 has a second limiting surface 45 and a third limiting surface 46, the extension lines of which point towards the rotation center 47 of the upper connecting rod; see also Figure 8 As shown, the upper connecting rod 5 has a second pin 51, see [reference]. Figure 13 and 14 As shown, when the circuit is closed, the second pin 51 contacts the second limiting surface 45, and when the circuit is engaged or disengaged, the second pin 51 contacts the third limiting surface 46.

[0031] See Figure 7 As shown, the lower link 6 rotates relative to the upper link 5: the lower link 6 has a fourth rotating part 61, and the upper link 5 has a lower link rotation center 53. The fourth rotating part 61 and the lower link rotation center 53 rotate in coordination.

[0032] See Figure 10 As shown, the contact support 82 rotates relative to the lower connecting rod 6: the contact support 82 has a fifth rotating part 83, and the lower connecting rod 6 has a contact support rotation center 62. The fifth rotating part 83 and the contact support rotation center 62 rotate in coordination.

[0033] See Figure 4 , Figure 8 and Figure 11 As shown, the upper connecting rod 5 has a second pin 51; the lever has a first pin 25; the two ends of the main tension spring 24 are hooked onto the second pin 51 and the first pin 25 respectively, to apply tension to the lever 2 and the upper connecting rod 5.

[0034] See Figure 2 , 4 As shown in Figures 5, 8, 9 and 15, the fastener 4, upper connecting rod 5 and lever 2 are U-shaped, the lower connecting rod 6 and bracket 3 are symmetrically arranged, the entire operating mechanism 1 is centered, and from both sides to the center, the distance between the lever 2 and the bracket 3 is the same as the center plane, the distance between the fastener 4 and the lower connecting rod 6 is the same as the center plane, the upper connecting rod 5, and the main tension spring 24.

[0035] See Figure 16The diagram shows the principle of the mechanism. In existing operating mechanisms, the upper connecting rod 5 only has rotational features at both ends, rotatably connecting the fastener 4 and the lower connecting rod 6 respectively. The rotation of the upper connecting rod 5 and the lower connecting rod 6 is achieved through shaft-like parts. Simultaneously, one end of the main tension spring 24 is hooked onto the lever 2, and the other end is hooked onto the shaft on which the upper connecting rod 5 and the lower connecting rod 6 rotate relative to each other. In this embodiment, the upper connecting rod 5 splits the shaft-like part on which it rotates with the lower connecting rod 6 into two parts. One part is attached to the main tension spring 24 to provide transmission force, and the other part is rotatably connected to the lower connecting rod 6 to apply transmission force to the lower connecting rod 6. See [link to relevant documentation]. Figure 17 The diagram shown is a schematic diagram of the mechanism.

[0036] Example 3 This embodiment provides a switching device, including an operating mechanism 1 as described in Embodiment 1 or Embodiment 2, and also includes a contact system 8, a stationary contact 9, and an arc extinguishing system 10; The contact system 8 includes a moving contact 81, a contact support 82, a fifth rotating part 83, and a sixth rotating part 84. The moving contact 81 extends from inside the contact support 82. The fifth rotating part 83 of the contact support 82 rotates with the contact support rotation center 62 of the lower connecting rod 6, so that the contact system 8 can rotate around the sixth rotating part 84.

[0037] Figure 16 The diagram shows the operating mechanism of an existing switchgear. In existing operating mechanisms, the upper link only has two rotating ends that rotatably connect to the latch and the lower link, respectively. The rotation of the upper and lower links is achieved through shaft-like parts. Simultaneously, one end of the main tension spring is hooked onto a lever, and the other end is hooked onto the shaft on which the upper and lower links rotate relative to each other. In this embodiment, the upper link splits the shaft-like part that rotates with the lower link into two parts: one part is attached to the main tension spring to provide power transmission, and the other part is rotatably connected to the lower link to apply power to the lower link. Figure 17 The diagram shown is a schematic of the operating mechanism in the switchgear provided in this embodiment. Compared with the prior art, this embodiment realizes the front placement of the upper and lower connecting rods, so that the arc extinguishing system is located below the operating mechanism and the upper and lower connecting rods, thereby increasing the space of the arc extinguishing system. Under the premise of keeping the circuit breaker height unchanged, the arc voltage can be increased by increasing the number of arc extinguishing grid plates.

[0038] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. An operating mechanism, characterized in that, include: The bracket (3) includes a limiting shaft (33) and a pair of bracket walls on both sides of the limiting shaft (33). A pair of lever rotation centers (31) and a pair of fastener rotation centers (32) are respectively provided on the pair of bracket walls. The fastener (4) includes a fastener body, on which a pair of second rotating parts (41) and a pair of upper connecting rod rotating centers (47) are provided. The pair of second rotating parts (41) are rotatably connected to the pair of fastener rotating centers (32) respectively. The lever (2) includes a lever body, on which a pair of locking pins (23) and a pair of first rotating parts (21) are provided, the first rotating parts (21) being able to rotate in the pair of lever rotation centers (31); The escapement component (7) includes a latch (71) which is rotatable relative to the bracket (3); The upper connecting rod (5) includes an upper connecting rod body, on which a second pin (51), a pair of third rotating parts (52) and a pair of lower connecting rod rotation centers (53) are provided. The third rotating parts (52) are rotatably connected to the upper connecting rod rotation centers (47), so that the upper connecting rod (5) can rotate relative to the fastener (4). The lower connecting rod (6) includes a pair of connecting plates. One end of the pair of connecting plates is provided with a pair of fourth rotating parts (61) and the other end is provided with a pair of contact support rotation centers (62). The pair of fourth rotating parts (61) are rotatably connected to the pair of lower connecting rod rotation centers (53), so that the lower connecting rod (6) can rotate relative to the upper connecting rod (5). The fastener body includes a first fastener wall and a pair of second fastener walls on both sides of the first fastener wall. The pair of second fastener walls are provided with a pair of second rotating parts (41). One side of the pair of second fastener walls extends outward to form a pair of re-fastening surfaces (43). The rotation centers (47) of the pair of upper connecting rods are located on the pair of re-fastening surfaces (43). The other side of the pair of second fastener walls extends outward to form a pair of second limiting surfaces (45) and a pair of third limiting surfaces (46). The side of the pair of second fastener walls opposite to the first fastener wall extends outward to form a pair of first limiting surfaces (44). The side of the first fastener wall opposite to the pair of second fastener walls is provided with a fastening surface (42). The pair of second rotating parts (41) are rotatably connected to the pair of fastener rotation centers (32). The latch (71) cooperates with the fastening surface (42) to realize re-fastening and unfastening. The lever body includes a first lever wall and a pair of second lever walls on both sides of the first lever wall. The portion of the pair of second lever walls near the first lever wall is provided with a re-locking shaft (23). The side of the pair of second lever walls away from the first lever wall is provided with a pair of first rotating parts (21). The side of the first lever wall away from the pair of second lever walls is provided with a first pin (25). The first rotating part (21) can rotate around the rotation center (31) of the pair of levers. The re-locking shaft (23) can contact the pair of re-locking surfaces (43). The upper connecting rod body includes a first upper connecting rod wall and a pair of second upper connecting rod walls on both sides of the first upper connecting rod wall. A second pin (51) connecting the two is provided between the pair of second upper connecting rod walls. A pair of third rotating parts (52) and a pair of lower connecting rod rotation centers (53) are also provided on the pair of second upper connecting rod walls. The third rotating parts (52) are rotatably engaged with the upper connecting rod rotation centers (47) so that the upper connecting rod (5) can rotate relative to the fastener (4). The second pin (51) of the upper connecting rod (5) is used to contact the second limiting surface (45) of the latch (4) when the operating mechanism is closed, and to contact the third limiting surface (46) of the latch (4) when the operating mechanism is re-locked or disengaged, so as to realize the positioning of the upper connecting rod (5) in different states. The operating mechanism also includes a main tension spring (24), the two ends of which are hooked to the first pin (25) and the second pin (51) respectively, so as to apply tension to the lever (2) and the upper connecting rod (5).

2. The operating mechanism according to claim 1, characterized in that, The extension lines of the second limiting surface (45) and the third limiting surface (46) on the same side pass through the rotation center (47) of the upper connecting rod on the same side.

3. The operating mechanism according to claim 1, characterized in that, The first limiting surface (44) of the buckle (4) is used to contact the limiting shaft (33) of the bracket (3) when the operating mechanism is disengaged, so as to limit the rotation range of the buckle (4) when it is disengaged.

4. The operating mechanism according to claim 1, characterized in that, The re-fastening surface (43) of the fastener (4) is used to contact the re-fastening shaft (23) of the lever (2) when the operating mechanism re-fastens, so that when the lever (2) rotates, the fastener (4) can be driven to rotate through the re-fastening shaft (23).

5. An operating mechanism according to claim 1, characterized in that, The lever (2) also includes a handle (22), which is fixedly connected to the lever (2). By rotating the handle (22), the lever (2) is driven to rotate relative to the bracket (3).

6. An operating mechanism according to claim 1, characterized in that, The lower connecting rod body includes a pair of connecting plates arranged opposite each other. One end of the pair of connecting plates is provided with a pair of fourth rotating parts (61) and the other end is provided with a pair of contact support rotation centers (62). The pair of fourth rotating parts (61) are rotatably connected to the pair of lower connecting rod rotation centers (53), so that the lower connecting rod (6) can rotate relative to the upper connecting rod (5).

7. A switching device, characterized in that, The operating mechanism (1) according to any one of claims 1-6 further includes a contact system (8), a stationary contact (9), and an arc extinguishing system (10). The contact system (8) includes a moving contact (81), a contact support (82), a fifth rotating part (83), and a sixth rotating part (84). The moving contact (81) extends from inside the contact support (82). The fifth rotating part (83) of the contact support (82) rotates with the contact support rotation center (62) of the lower connecting rod (6), so that the contact system (8) can rotate around the sixth rotating part (84).

Images