Molded case circuit breaker

Abstract

A molded case circuit breaker comprises a first transmission gear, a fixed sliding frame, a sliding block and a linkage structure, the first transmission gear is rotatably installed in the circuit breaker, the sliding block is connected to the fixed sliding frame in a sliding mode, the head of a switch handle is arranged on the sliding block in a penetrating mode, and the linkage structure is arranged between the first transmission gear and the sliding block. The linkage structure comprises a transverse moving plate and a transmission bearing, one end of the transverse moving plate is fixedly connected with the sliding block, a first linkage protruding part and a second linkage protruding part are arranged on the lower portion of the other end of the transverse moving plate in a front-back mode, the transmission bearing is arranged on the first transmission gear and staggered with the center of the first transmission gear, and the first transmission gear rotates by one circle as a cycle. The first linkage convex part and the second linkage convex part are both located on a rotating path of the transmission bearing, and the transmission bearing interacts with the outer side of the first linkage convex part and the inner side of the second linkage convex part. According to the utility model, reasonable completion of the tripping action can be ensured, the structural design is reasonable, the operation is convenient, and the use is safer.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage circuit breaker technology, and in particular to a molded case circuit breaker. Background Technology

[0002] Circuit breakers are mainly used for overload, undervoltage, and short-circuit protection of electrical equipment. In related technologies, the opening and closing of circuit breakers are controlled by rotating a handle. However, manual control has operational limitations. If the operator cannot reach the site in time, the circuit breaker will remain in the open state and cannot be closed in time, which may lead to delays in power consumption and distribution. It is also inconvenient to use. In addition, the existing circuit breaker opening and closing operating mechanism is complex in structure, inconvenient to operate, and unreliable. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a molded case circuit breaker with reasonable structural design, convenient operation and safe use.

[0004] The technical solution adopted by this utility model to solve its technical problem is a molded case circuit breaker, including a first transmission gear, a fixed slide, a sliding block, and a linkage structure. The first transmission gear is rotatably installed inside the circuit breaker, the fixed slide is fixedly installed inside the circuit breaker, and the fixed slide is arranged in front of the first transmission gear. The sliding block is slidably connected to the fixed slide, and the head of the switch handle passes through the sliding block. The linkage structure is arranged between the first transmission gear and the sliding block. The first transmission gear drives the sliding block to move laterally through the linkage structure. The linkage structure includes a transverse plate and a transmission bearing. One end of the transverse plate is fixedly connected to the sliding block, and the other end of the transverse plate has a first linkage protrusion and a second linkage protrusion on its lower part. The transmission bearing is arranged on the first transmission gear and is offset from the center of the first transmission gear. One rotation of the first transmission gear is one cycle, and the first linkage protrusion and the second linkage protrusion are both located on the rotation path of the transmission bearing. The transmission bearing interacts with the outer side of the first linkage protrusion and the inner side of the second linkage protrusion.

[0005] The advantages of the above technical solution are as follows: During manual opening and closing, the operator rotates the first transmission gear, which causes the transmission bearing to press against the outer side of the first linkage protrusion. Under the constraint of the fixed slide, the transverse plate drives the sliding block to move laterally to one side. After rotating to a certain angle, the switch handle actuates, putting the circuit breaker in the open position. After the first transmission gear rotates to 180°, the transmission bearing stops pressing against the first linkage protrusion, and the opening action is completed. Continuing to rotate the first transmission gear causes the transmission bearing to press against the inner side of the second linkage protrusion. At this time, the transverse plate will drive the sliding block. After moving laterally to the other side and rotating to a certain angle, the switch handle actuates to close the circuit breaker. After the first transmission gear rotates 360°, the transmission bearing stops pressing against the second linkage protrusion, and the closing action is completed. In a circuit breaker with the above structure, when the tripping action is performed, the switch handle actuates to drive the sliding block and the transverse plate to move laterally to one side for a certain distance. Compared with the linkage method used in the prior art, it is not necessary to drive the first transmission gear to rotate. Therefore, it can ensure the proper completion of the tripping action. The structure is reasonable, the operation is convenient, and the use is safer.

[0006] Furthermore, the transverse plate is also provided with a first transverse groove, the extension direction of the first transverse groove is parallel to the transverse direction of the transverse plate, the first linkage protrusion and the second linkage protrusion are arranged on both sides of the first transverse groove, a first transverse column is provided at the center position of the first transmission gear, and the first transverse groove is also open on one side of the first transverse column, and the first transverse column cooperates with the first transverse groove.

[0007] The advantages of adopting the above technical solution are: the cooperation between the first transverse groove and the first transverse column makes the transverse movement of the transverse plate stable, thereby ensuring the smooth sliding cooperation between the sliding block and the fixed slide. The position structure design is reasonable and the use effect is good.

[0008] Furthermore, the transverse plate is also provided with a second transverse groove, which is arranged parallel to the first transverse groove. The circuit breaker is provided with a second transverse column, which cooperates with the second transverse groove.

[0009] The advantages of adopting the above technical solution are: through the cooperation of the second transverse groove and the second transverse column, the transverse movement of the transverse plate is more stable, thereby ensuring a smoother sliding cooperation between the sliding block and the fixed slide, a reasonable positional structure design, and better performance.

[0010] Furthermore, the circuit breaker also includes a clutch shaft, a second transmission gear, a third transmission gear, a gear set, and a drive motor. The clutch shaft is rotatably mounted inside the circuit breaker. The second transmission gear is fixedly mounted on the clutch shaft and meshes with the first transmission gear. The third transmission gear is located below the second transmission gear and has a one-way rotational engagement structure with the clutch shaft. The gear set meshes with the third transmission gear. The drive motor is used to drive the gear set to rotate, so that the one-way rotational engagement structure drives the clutch shaft to rotate.

[0011] The advantages of the above technical solution are as follows: Because a one-way rotational engagement structure is provided between the third transmission gear and the clutch shaft, the clutch shaft will not drive the second transmission gear to rotate during manual opening and closing. During electric opening and closing, the drive motor rotates the gear set, and the third transmission gear, which meshes with the gear set, rotates. During this process, the one-way rotational engagement structure drives the clutch shaft to rotate synchronously. The clutch shaft then drives the second transmission gear to rotate, which in turn drives the switch handle via the first transmission gear, transmission bearing, transverse plate, and sliding block, thus opening and closing the internal structure of the circuit breaker. Therefore, the design of the above structure enables the circuit breaker to achieve both manual and electric control of opening and closing. Furthermore, the control actions of the third transmission gear and the clutch shaft are not completely overlapping, thereby improving operational safety and making it safer to use.

[0012] Furthermore, the circuit breaker also includes a lower fixing plate and an upper fixing plate fixedly connected by screws. The lower fixing plate is integrally formed with a first protruding hole block and a second protruding hole block, and the upper fixing plate is integrally formed with a first mounting hole, a second mounting hole and a third protruding hole block. The first mounting hole is used to install the first transmission gear, the second mounting hole and the first protruding hole block are used to install the clutch shaft, and the second protruding hole block and the third protruding hole block are used to install the gear set.

[0013] The advantages of the above technical solution are as follows: the first convex hole block and the second mounting hole limit the position of the clutch shaft; the second convex hole block and the third convex hole block limit the position of the gear set; and the first mounting hole limits the position of the first transmission gear. Therefore, through the structural design of the lower fixed plate and the upper fixed plate, the purpose of integrated installation of the first transmission gear, the clutch shaft with the second transmission gear and the third transmission gear, and the gear set is achieved. The assembly method is reasonable. At the same time, compared with the existing technology, which uses mounting posts fixed by screws on the lower fixed plate and the upper fixed plate, the first convex hole block, the second convex hole block, and the third convex hole block are integrally formed, which simplifies the assembly process and the assembled parts, and the performance is also better.

[0014] Furthermore, a first support block is integrally formed on the lower fixing plate, and a second support block is integrally formed on the upper fixing plate. The first support block and the second support block are correspondingly fitted and connected, and a first connecting hole and a second connecting hole are respectively formed through the first support block and the second support block.

[0015] The advantages of adopting the above technical solution are: by integrally forming the first support block and the second support block on the lower fixed plate and the upper fixed plate, and by setting the first connecting hole and the second connecting hole on the first support block and the second support block, the structure after the lower fixed plate and the upper fixed plate are assembled is more stable and the structural design is reasonable.

[0016] Furthermore, the transverse plate is provided with a status indicator, and the circuit breaker housing is provided with an indicator window, which cooperates with the status indicator.

[0017] The advantages of adopting the above technical solution are: by placing the status indicator on the transverse plate, the operator can observe the changes of the status indicator through the indicator window on the circuit breaker housing, thereby understanding the working status of the circuit breaker. Compared with the structure of placing the status indicator on the clutch shaft, it is safer to use.

[0018] Furthermore, the circuit breaker is also equipped with a first micro switch and a second micro switch at the front and rear, respectively. The contacts of the first micro switch and the second micro switch are used for the sliding block to press against each other.

[0019] The advantages of adopting the above technical solution are: by setting the first micro switch and the second micro switch, the position monitoring of the sliding block is achieved, making it safer to use. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a partial structural diagram of the present invention. Figure 1 ;

[0022] Figure 3 This is a partial structural diagram of the present invention. Figure 2 ;

[0023] Figure 4 This is a schematic diagram of the transverse sliding plate structure of this utility model;

[0024] Figure 5 This is a partial structural diagram of the present invention. Figure 3 ;

[0025] Figure 6 This is a schematic diagram of the lower fixing plate structure of this utility model;

[0026] Figure 7 This is a schematic diagram of the upper fixing plate structure of this utility model. Figure 1 ;

[0027] Figure 8 This is a schematic diagram of the upper fixing plate structure of this utility model. Figure 2 ;

[0028] Figure 9 This is a partial structural diagram of the present invention. Figure 4 ;

[0029] Figure 10 This is a partial structural diagram of the present invention. Figure 5 ;

[0030] Figure 11 This is a partial structural diagram of the present invention. Figure 6 ;

[0031] Figure 12 This is a partial structural diagram of the present invention. Figure 7 .

[0032] In the diagram: 1-First transmission gear, 2-Fixed slide, 3-Sliding block, 4-Switch handle, 5-Transverse plate, 6-Transmission bearing, 7-First linkage protrusion, 8-Second linkage protrusion, 9-First transverse groove, 10-First transverse column, 11-Second transverse groove, 12-Second transverse column, 13-Clutch shaft, 14-Second transmission gear, 15-Third transmission gear, 16-Gear set, 17-Drive motor, 18-One-way rotational mating structure, 19-Lower fixed plate, 20-Upper fixed plate, 21-First protruding hole block, 22-Second protruding hole 23-First mounting hole, 24-Second mounting hole, 25-Third protruding hole block, 26-First support block, 27-Second support block, 28-Status indicator, 29-Indicator window, 30-First micro switch, 31-Second micro switch, 32-Manual operation part, 33-First mounting block, 34-Second mounting block, 35-Guide rod, 36-Third micro switch, 37-Third mounting block, 38-Fourth mounting block, 39-Placement slot, 40-Hex wrench, 41-Elastic hook, 42-Positioning insert, 43-Positioning slot. Detailed Implementation

[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model and / or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without creative effort. Furthermore, references to orientation only indicate the relative positional relationship between the components, not their absolute positional relationship.

[0034] like Figures 1-12 As shown, a molded case circuit breaker includes a first drive gear 1, a fixed slide 2, a sliding block 3, and a linkage structure. The first drive gear 1 is rotatably mounted inside the circuit breaker, the fixed slide 2 is fixedly mounted inside the circuit breaker, and the fixed slide 2 is positioned in front of the first drive gear 1. The sliding block 3 is slidably connected to the fixed slide 2, and the head of the switch handle 4 passes through the sliding block 3. The linkage structure is located between the first drive gear 1 and the sliding block 3. The first drive gear 1 drives the sliding block 3 to move laterally through the linkage structure. The linkage structure includes a lateral movement mechanism. Plate 5 and transmission bearing 6, one end of the transverse plate 5 is fixedly connected to the sliding block 3 by screws, and the other end of the transverse plate 5 is provided with a first linkage protrusion 7 and a second linkage protrusion 8 on the lower part. The transmission bearing 6 is set on the first transmission gear 1 and is offset from the center of the first transmission gear 1. The first transmission gear 1 rotates one revolution as one cycle. That is to say, the first linkage protrusion 7 and the second linkage protrusion 8 are both located on the rotation path of the transmission bearing 6. The transmission bearing 6 interacts with the outer side of the first linkage protrusion 7 and the inner side of the second linkage protrusion 8.

[0035] In this embodiment, the transverse plate 5 can be a metal plate, and the first linkage protrusion 7 and the second linkage protrusion 8 can be a bent plate formed by bending downwards at one edge of the transverse plate 5. The first transmission gear 1 rotates counterclockwise. The second linkage protrusion 8 and the first linkage protrusion 7 are also arranged on the left and right sides of the transverse plate 5. At the same time, the first transmission gear 1 can complete one opening and closing action by rotating 360°. During manual opening and closing, the operator rotates the first transmission gear 1 counterclockwise. The first transmission gear 1 causes the transmission bearing 6 to press against the outside of the first linkage protrusion 7. Under the restriction of the fixed slide 2, the transverse plate 5 drives the sliding block 3 to move laterally to one side. After rotating to a certain angle, the switch handle 4 is activated to open the circuit breaker. After the first transmission gear 1 rotates to 180°, the transmission bearing... 6 will not press against the first linkage protrusion 7, the tripping action is completed, the first transmission gear 1 continues to rotate, so that the transmission bearing 6 presses against the inner side of the second linkage protrusion 8. At this time, the transverse plate 5 will drive the sliding block 3 to move laterally to the other side. After rotating to a certain angle, the switch handle 4 will move to close the circuit breaker. After the first transmission gear 1 rotates to 360°, the transmission bearing 6 will not press against the second linkage protrusion 8, the closing action is completed. In a circuit breaker with the above structure, when performing the tripping action, the switch handle 4 will move the sliding block 3 and the transverse plate 5 laterally to one side for a certain distance. Compared with the linkage method used in the prior art, it is not necessary to drive the first transmission gear 1 to rotate. Therefore, it can ensure the reasonable completion of the tripping action. The structure is reasonable, the operation is convenient, and the use is safer.

[0036] In this embodiment, the transverse plate 5 is also provided with a first transverse groove 9. The extension direction of the first transverse groove 9 is parallel to the transverse direction of the transverse plate 5. The first linkage protrusion 7 and the second linkage protrusion 8 are arranged on both sides of the first transverse groove 9. A first transverse column 10 is provided at the center of the first transmission gear 1, and the first transverse groove 9 is also open on one side of the first transverse column 10. That is, the opening of the first transverse groove 9 faces the first transverse column 10. The first transverse column 10 cooperates with the first transverse groove 9. In the above structure, the transverse movement of the transverse plate 5 is stable through the cooperation of the first transverse groove 9 and the first transverse column 10, thereby ensuring the smooth sliding cooperation between the sliding block 3 and the fixed slide 2. The position structure design is reasonable and the use effect is good.

[0037] In this embodiment, a second transverse groove 11 is also provided on the transverse plate 5. The second transverse groove 11 is arranged parallel to the first transverse groove 9. A second transverse column 12 is provided inside the circuit breaker. The second transverse column 12 cooperates with the second transverse groove 11. Through the cooperation of the second transverse groove and the second transverse column, the transverse movement of the transverse plate is more stable, thereby ensuring a smoother sliding cooperation between the sliding block and the fixed slide. The position and structure design is reasonable and the use effect is better.

[0038] In this embodiment, the top of the second transverse column 12 passes through the second transverse groove 11. At the same time, without affecting the transverse movement of the second transverse column 12, a limiting member can also be provided at the top of the second transverse column 12. The limiting member makes the practical effect of the second transverse column 12 better.

[0039] In this embodiment, the circuit breaker further includes a clutch shaft 13, a second transmission gear 14, a third transmission gear 15, a gear set 16, and a drive motor 17. The clutch shaft 13 is rotatably mounted inside the circuit breaker. The second transmission gear 14 is fixedly mounted on the clutch shaft 13 and meshes with the first transmission gear 15. The third transmission gear 15 is located below the second transmission gear 14 and has a one-way rotational engagement structure 18 between itself and the clutch shaft 13. The gear set 16 meshes with the third transmission gear 15. The drive motor 17 drives the gear set 16 to rotate, so that the one-way rotational engagement structure 18 drives the clutch shaft 13 to rotate. In the above structure, since the third transmission gear 15 has a one-way rotational engagement structure 18 between itself and the clutch shaft 13, the third transmission gear 15 and the gear set can be rotated. The arrangement of gear sets 16 ensures that during manual opening and closing, the clutch shaft 13 will not drive the second transmission gear 14 to rotate. During electric opening and closing, the drive motor 17 drives the gear set 16 to rotate, and the third transmission gear 15, which meshes with the gear set 16, rotates. During this process, the unidirectional rotational engagement structure 18 drives the clutch shaft 13 to rotate synchronously. The clutch shaft 13 drives the second transmission gear 14 to rotate, and then the first transmission gear 1, transmission bearing 6, transverse plate 5, and sliding block 3 drive the switch handle 4 to open and close the internal structure of the circuit breaker. Therefore, the design of the above structure enables the circuit breaker to achieve the purpose of manual and electric control of opening and closing. Moreover, the control actions of the third transmission gear 15 and the clutch shaft 13 are not completely overlapping, thereby improving operational safety and making it safer to use.

[0040] In this embodiment, the one-way rotational mating structure 18 adopts a one-way bearing, which is existing technology and will not be described in detail here.

[0041] In this embodiment, the unidirectional rotation structure 18 can also be composed of a ratchet groove, a clutch ball, and a spring. There are two ratchet grooves formed on the inner wall of the shaft hole of the third transmission gear 15. The ratchet groove is for the clutch shaft 13 to be inserted and engaged. The clutch ball is located on one side of the outer end of the spring. The clutch shaft 13 is provided with a clutch hole in the radial direction. The clutch hole is a blind hole structure. The clutch ball and the spring are engaged with the clutch hole. The spring is used to push the clutch ball against the inner wall of the ratchet groove. The ratchet groove is set on the inner wall of the shaft hole of the third transmission gear 15, and the clutch hole for installing the clutch ball and the spring is set on the clutch shaft 13. During the relative rotation of the third transmission gear 15 and the clutch shaft 13, the clutch will always be in contact with the inner wall of the ratchet groove due to the preload of the spring. The above structure can realize that the third transmission gear 15 can drive the clutch shaft 13 to rotate only when it rotates in a specific direction.

[0042] In this embodiment, the circuit breaker further includes a lower fixing plate 19 and an upper fixing plate 20 fixedly connected by screws. The lower fixing plate 19 has a first protruding hole block 21 and a second protruding hole block 22 integrally formed on it. The upper fixing plate 20 has a first mounting hole 23, a second mounting hole 24, and a third protruding hole block 25 integrally formed on it. The first mounting hole 23 is used to mount the first transmission gear 1, the second mounting hole 24 and the first protruding hole block 21 are used to mount the clutch shaft 13, and the second protruding hole block 22 and the third protruding hole block 25 are used to mount the gear set 16. In the above structure, the first mounting hole 23 enables the mounting of the first transmission gear 1... Position limitation: The second mounting hole 24 and the first protruding hole block 21 define the position of the clutch shaft 13, while the second protruding hole block 22 and the third protruding hole block 25 define the position of the gear set 16. The first mounting hole 23 is a through hole, and a bearing is mounted on the front side of the first mounting hole 23. The mounting shaft at the shaft hole of the first transmission gear 1 passes through the first mounting hole 23 via rotation with the bearing. The bottom of the clutch shaft 13 engages with the first protruding hole block 21. More specifically, the bottom of the clutch shaft 13 is inserted into the first protruding hole block 21, forming a positional limitation and allowing relative rotation. The second mounting hole 24... 4 is also a perforation. The upper part of the clutch shaft 13 passes through the second mounting hole 24. The gear set 16 consists of three meshing gears. Therefore, the second protruding hole block 22 and the third protruding hole block 25 are also set to three respectively. The gear set 16 is inserted into the second protruding hole block 22 and the third protruding hole block 25 through the gear shaft on the gear to form a position limit and allow rotation. It should be noted that a supporting rib is integrally formed on the periphery of the upper fixing plate 20 at the first mounting hole 23. The supporting rib supports and cooperates with the first transmission gear 1. This can not only form an effective position limit for the first transmission gear 1, but also prevent the first transmission gear 1 from being rotated. The drive gear 1 is attached to the upper fixed plate 20. Therefore, through the structural design of the lower fixed plate 19 and the upper fixed plate 20, the purpose of the integrated installation of the first transmission gear 1, the clutch shaft 13 with the second transmission gear 14 and the third transmission gear 15, and the gear set 16 is achieved. The assembly method is reasonable. At the same time, compared with the existing technology, which uses mounting posts fixed by screws on the lower fixed plate 19 and the upper fixed plate 20, the first protruding hole block 21, the second protruding hole block 22, and the third protruding hole block 25 are integrally formed, which simplifies the assembly process and the assembled parts, and the use effect is also better.

[0043] In this embodiment, a first support block 26 is integrally formed on the lower fixing plate 19, and a second support block 27 is integrally formed on the upper fixing plate 20. The first support block 26 and the second support block 27 are correspondingly fitted and connected, and a first connecting hole and a second connecting hole are respectively formed through the first support block 26 and the second support block 27. In the above structure, by integrally forming the first support block 26 and the second support block 27 on the lower fixing plate 19 and the upper fixing plate 20, and by setting the first connecting hole and the second connecting hole on the first support block 26 and the second support block 27, the structure after the lower fixing plate 19 and the upper fixing plate 20 are assembled is more stable and the structural design is reasonable.

[0044] In this example, a status indicator 28 is provided on the transverse plate 5, and an indicator window 29 is provided on the circuit breaker housing. The indicator window 29 cooperates with the status indicator 28. In the above structure, the status indicator 28 can be different colors corresponding to the open, closed and tripped states. By setting the status indicator 28 on the transverse plate 5, the operator can observe the changes of the status indicator 28 through the indicator window 29 on the circuit breaker housing, thereby understanding the working status of the circuit breaker. Compared with the structure of setting the status indicator 28 on the clutch shaft 13, it is safer to use.

[0045] In this embodiment, the circuit breaker is also equipped with a first micro switch 30 and a second micro switch 31 at the front and rear. The contacts of the first micro switch 30 and the second micro switch 31 are used for the sliding block 3 to press against. In the above structure, the purpose of monitoring the position of the sliding block 3 is achieved by setting the first micro switch 30 and the second micro switch 31, making it safer to use.

[0046] In this embodiment, the clutch shaft 13 is provided with a manual operation part 32, that is, the rotation of the first transmission gear 1 is driven by rotating the clutch shaft 13.

[0047] In this embodiment, the fixed slide 2 includes a first mounting block 33, a second mounting block 34, and two guide rods 35. The guide rods 35 connect the first mounting block 33 and the second mounting block 34. The guide rods 35 are arranged on both sides of the sliding block 3. Therefore, the corresponding sides of the sliding block 3 are also provided with sliding grooves. The sliding grooves cooperate with the guide rods 35. In the above structure, the assembled fixed slide 2 will have a rectangular frame structure. At the same time, the sliding block 3 achieves the purpose of sliding connection on the fixed slide 2 through the cooperation of the sliding grooves on both sides and the corresponding guide rods 35. The overall structure is simple, easy to install, and has a good sliding effect.

[0048] In this embodiment, the first mounting block 33 is integrally formed on the lower fixing plate 19 or the upper fixing plate 20, and the first mounting block 33 also provides support for the upper fixing plate 20 and the lower fixing plate 19. More specifically, the second mounting block 34 is screwed to the circuit board. The positions of the first mounting block 33 and the second mounting block 34 within the circuit breaker are reasonably set, reducing the volume of the circuit breaker. At the same time, the first mounting block 33 is integrally formed on the upper fixing plate 20 or the lower fixing plate 19, making assembly more convenient. The first mounting block 33 also has the function of supporting the upper fixing plate 20 and the lower fixing plate 19. The connection between the assembled upper fixing plate 20 and the lower fixing plate 19 is more stable, and the structural design is reasonable.

[0049] In this embodiment, the first mounting block 33 is integrally formed on the lower fixing plate 19, which makes the structural design relatively reasonable.

[0050] In this embodiment, the circuit breaker is also provided with a third micro switch 36, a third mounting block 37 is integrally formed on the lower fixing plate 19, and a fourth mounting block 38 is integrally formed on the upper fixing plate 20. Mounting posts and / or mounting holes can be provided on the third mounting block 37 and the fourth mounting block 38. In the above structure, the third mounting block 37 is used to install the second micro switch 31, and the fourth mounting block 38 is used to install the third micro switch 36. By integrally forming the third mounting block 37 and the fourth mounting block 38 on the lower fixing plate 19 and the upper fixing plate 20, the purpose of installing the second micro switch 31 and the third micro switch 36 can be achieved. Compared with the prior art, the installation accuracy is higher and the product performance is better by bending the mounting part.

[0051] In this embodiment, the first mounting block 33 is also provided with a third connecting hole that passes through the upper part, and a fourth connecting hole is formed at the corresponding position of the upper fixing plate 20. The third connecting hole and the fourth connecting hole are used to install screws. In the above structure, by setting the third connecting hole and the fourth connecting hole, the structure after the lower fixing plate 19 and the upper fixing plate 20 are assembled is more stable and the structural design is more reasonable.

[0052] In this embodiment, the lower fixing plate 19 is also provided with a fifth mounting block, and a U-shaped recess is formed on the fifth mounting block. The upper fixing plate 20 is also provided with a third support block, which is fitted and connected to the fifth mounting block. More specifically, there are two third support blocks, which are arranged on both sides of the U-shaped recess. In the above structure, the U-shaped recess is used to cooperate with the drive motor 17. The arrangement of the third support blocks makes the structure after the lower fixing plate 19 and the upper fixing plate 20 are assembled more stable.

[0053] In this embodiment, the manual operation part 32 is an internal hexagonal hole, and the circuit breaker is provided with a placement slot 39. The placement slot 39 is provided with a hexagonal wrench 40 that cooperates with the manual operation part 32. The placement slot 39 is also provided with a flexible hook 41 to fix the hexagonal wrench 40. The circuit breaker comes with a hexagonal wrench 40. When needed, the hexagonal wrench 40 can be directly pulled out from the placement slot 39 without the need to find additional tools, making the operation more convenient. In addition, the placement slot 39 is provided with a flexible hook 41, so the hexagonal wrench 40 is not easy to lose.

[0054] In this embodiment, the lower fixing plate 19 is provided with a positioning plug 42, and the upper fixing plate 20 is provided with a positioning slot 43. The positioning plug 42 and the positioning slot 43 are inserted and fitted together. In the above structure, the lower fixing plate 19 and the upper fixing plate 20 are installed more reasonably through the cooperation of the positioning plug 42 and the positioning slot 43.

[0055] In another embodiment, the similarities will not be detailed here. In this structure, the first transmission gear 1 rotates clockwise. At this time, the first linkage protrusion 7 and the second linkage protrusion 8 are arranged on the left and right sides of the transverse plate 5.

[0056] In the above embodiments, the manual operation unit 32 can also be provided on the first transverse column 10. More specifically, in the above structure, by providing the manual operation unit 32 on the first transverse column 10, and in conjunction with the rotation angle indicator mark on the circuit breaker housing, compared to providing the manual operation unit 32 on the clutch shaft 13 (where the transmission ratio of the second transmission gear 14 on the clutch shaft 13 is smaller), the user can operate more accurately and the usage effect will be better.

[0057] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A molded case circuit breaker, comprising a first transmission gear (1), a fixed slide (2), a sliding block (3), and a linkage structure, wherein the first transmission gear (1) is rotatably mounted inside the circuit breaker, the fixed slide (2) is fixedly mounted inside the circuit breaker and is positioned in front of the first transmission gear (1), the sliding block (3) is slidably connected to the fixed slide (2), the head of a switch handle (4) passes through the sliding block (3), and the linkage structure is disposed between the first transmission gear (1) and the sliding block (3), wherein the first transmission gear (1) drives the sliding block (3) to move laterally through the linkage structure, characterized in that: The linkage structure includes a transverse plate (5) and a transmission bearing (6). One end of the transverse plate (5) is fixedly connected to the sliding block (3). The other end of the transverse plate (5) has a first linkage protrusion (7) and a second linkage protrusion (8) on its lower part. The transmission bearing (6) is located on the first transmission gear (1) and is offset from the center of the first transmission gear (1). The first transmission gear (1) rotates once for one cycle. The first linkage protrusion (7) and the second linkage protrusion (8) are both located on the rotation path of the transmission bearing (6). The transmission bearing (6) interacts with the outer side of the first linkage protrusion (7) and the inner side of the second linkage protrusion (8).

2. A molded case circuit breaker according to claim 1, characterized in that: The transverse plate (5) is also provided with a first transverse groove (9). The extension direction of the first transverse groove (9) is parallel to the transverse direction of the transverse plate (5). The first linkage protrusion (7) and the second linkage protrusion (8) are arranged on both sides of the first transverse groove (9). A first transverse column (10) is provided at the center position of the first transmission gear (1). The first transverse groove (9) is also open on one side of the first transverse column (10). The first transverse column (10) cooperates with the first transverse groove (9).

3. A molded case circuit breaker according to claim 2, characterized in that: The transverse plate (5) is also provided with a second transverse groove (11), which is arranged parallel to the first transverse groove (9). The circuit breaker is provided with a second transverse column (12), which cooperates with the second transverse groove (11).

4. A molded case circuit breaker according to claim 1 or 3, characterized in that: The circuit breaker also includes a clutch shaft (13), a second transmission gear (14), a third transmission gear (15), a gear set (16), and a drive motor (17). The clutch shaft (13) is rotatably installed inside the circuit breaker. The second transmission gear (14) is fixedly installed on the clutch shaft (13) and meshes with the first transmission gear (1). The third transmission gear (15) is located below the second transmission gear (14) and has a one-way rotational engagement structure (18) between it and the clutch shaft (13). The gear set (16) meshes with the third transmission gear (15). The drive motor (17) is used to drive the gear set (16) to rotate so that the one-way rotational engagement structure (18) drives the clutch shaft (13) to rotate.

5. A molded case circuit breaker according to claim 4, characterized in that: The circuit breaker also includes a lower fixing plate (19) and an upper fixing plate (20) fixedly connected by screws. The lower fixing plate (19) has a first protruding hole block (21) and a second protruding hole block (22) integrally formed on it. The upper fixing plate (20) has a first mounting hole (23), a second mounting hole (24) and a third protruding hole block (25) integrally formed on it. The first mounting hole (23) is used to install the first transmission gear (1). The second mounting hole (24) and the first protruding hole block (21) are used to install the clutch shaft (13). The second protruding hole block (22) and the third protruding hole block (25) are used to install the gear set (16).

6. A molded case circuit breaker according to claim 5, characterized in that: The lower fixing plate (19) is also integrally formed with a first support block (26), and the upper fixing plate (20) is also integrally formed with a second support block (27). The first support block (26) and the second support block (27) are correspondingly fitted and connected, and the first support block (26) and the second support block (27) are respectively formed with a matching first connecting hole and a second connecting hole.

7. A molded case circuit breaker according to claim 5, characterized in that: The transverse plate (5) is provided with a status indicator (28), and the circuit breaker housing is provided with an indicator window (29), which cooperates with the status indicator (28).

8. A molded case circuit breaker according to claim 1, characterized in that: The circuit breaker is also equipped with a first micro switch (30) and a second micro switch (31) at the front and rear. The contacts of the first micro switch (30) and the second micro switch (31) are used for the sliding block (3) to press against each other.

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