Device for single-motor control circuit breaker drawer access and electric closing and opening

Abstract

The utility model discloses a single motor control circuit breaker drawer in and out and electric closing and opening device, including the casing, be equipped with drive motor, drawer drive screw rod, the split operation shaft and transmission shaft on the casing, install first gear and second gear on the motor shaft of drive motor, and first gear and second gear are matched through first clutch, and the third gear that meshes with second gear is linked and installed on transmission shaft, and the fourth gear that meshes with third gear is equipped on drawer drive screw rod, and the linkage disc and fifth gear are installed on split operation shaft, and fifth gear meshes with first gear, and the linkage disc is matched with fifth gear through second clutch, still be equipped with the first electromagnet for controlling first clutch split and the second electromagnet for controlling second clutch split on the casing. The utility model discloses a single motor realizes circuit breaker drawer electric propulsion and pushes out and electric closing and opening, has reduced the occupied space of structure, has reduced production cost.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker structure technology, and in particular to a device for controlling the opening and closing of a circuit breaker drawer and the electric closing and opening of the circuit breaker by a single motor. Background Technology

[0002] Universal circuit breakers, also known as frame circuit breakers, can connect, carry, and disconnect current under normal circuit conditions, and can also disconnect fault current under specified abnormal circuit conditions. In terms of application, universal circuit breakers are divided into fixed circuit breakers and withdrawable circuit breakers. Because withdrawable circuit breakers are mounted in a drawer and can be moved within the drawer, they offer advantages such as convenient inspection and maintenance, and are therefore widely used.

[0003] Currently, the circuit breaker drawer in the market uses two sets of devices to drive the opening and closing of the circuit breaker drawer and the electric opening and closing. Each of the two sets of devices is driven by a motor, which not only occupies a large space but also has a high production cost. Utility Model Content

[0004] The purpose of this invention is to provide a device for controlling the entry and exit of a circuit breaker drawer and for electric closing and opening of the circuit breaker using a single motor. This invention achieves electric pushing and pushing of the circuit breaker drawer and electric closing and opening of the circuit breaker using a single motor, which not only greatly reduces the space occupied by the structure, but also significantly reduces the production cost.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a device for controlling the drawer entry and exit and electric closing and opening of a circuit breaker using a single motor, comprising a housing, a drive motor, a drawer drive screw, a closing / opening operation shaft, and a transmission shaft on the housing. A first gear is linked to the motor shaft of the drive motor, and a second gear is rotatably mounted thereon. The first and second gears engage with each other via a first clutch. A third gear, meshing with the second gear, is linked to the transmission shaft. A fourth gear, meshing with the third gear, is mounted on the drawer drive screw. A linkage disc is linked to the closing / opening operation shaft, and a fifth gear is rotatably mounted thereon. The fifth gear meshes with the first gear, and the linkage disc engages with the fifth gear via a second clutch. The housing also includes a first electromagnet and a second electromagnet. The first electromagnet extends or retracts to control the first clutch, causing the first and second gears to engage or disengage. The second electromagnet extends or retracts to control the second clutch, causing it to engage or disengage.

[0006] By adopting the above technical solution, when the drawer is electrically operated to move in and out, the motor shaft of the drive motor rotates, the first electromagnet is energized and extends to act on the first spring clip of the first clutch, causing the first clutch to be in a linked state. The motor shaft drives the first gear and the second gear to rotate, the second gear drives the third gear on the transmission shaft to rotate, the third gear drives the fourth gear to rotate, and in turn drives the drawer drive screw to rotate, realizing the drawer moving in and out. When the drawer is moving in and out, the second electromagnet is de-energized, the second clutch is in a disengaged state, the fifth gear spins freely, and the opening and closing operation shaft does not rotate. When the circuit breaker is electrically operated to open and close, the motor shaft of the drive motor rotates, the first electromagnet is energized and extends to act on the second spring clip of the second clutch, causing the second clutch to be in a linked state. When the motor shaft drives the first gear to rotate, the first gear drives the fifth gear to rotate, the fifth gear drives the linkage disc to rotate, and in turn drives the opening and closing operation shaft to perform the circuit breaker opening and closing operation. When the circuit breaker is operating to open and close, the first electromagnet is de-energized, the first clutch is in a disengaged state, the second gear does not rotate, and thus the drawer drive screw does not rotate. This design uses a single motor to electrically push and push the circuit breaker drawer out and electrically close and open the circuit breaker, which not only greatly reduces the space occupied by the structure, but also significantly reduces production costs.

[0007] The present invention is further provided that the front end of the drawer drive screw and the opening and closing operation shaft are respectively provided with a first operation hole and a second operation hole for inserting a handle.

[0008] By adopting the above technical solution, it is convenient to manually operate the drawer drive screw to move the drawer in and out, and to manually operate the opening and closing operation shaft to open and close the circuit breaker.

[0009] The present invention is further configured such that a baffle is slidably disposed on the housing, and a manual operation micro switch electrically connected to the drive motor is also provided on the housing. One end of the baffle abuts against the spring of the manual operation micro switch, and the other end of the baffle extends to the front of the first operating hole of the drawer drive screw. When the handle is inserted into the first operating hole, the baffle slides and triggers the manual operation micro switch, so that the drive motor does not work.

[0010] By adopting the above technical solution, the back-end terminal cannot operate the drive motor when the drawer is manually moved in and out, thus improving operational safety.

[0011] The present invention is further configured to include a first cam, a pin plate, and a tension spring. The first cam is linkedly mounted on the opening and closing operation shaft. The pin plate is slidably mounted vertically on the housing. One end of the tension spring is connected to the housing, and the other end of the tension spring is connected to the pin plate. When the opening and closing operation shaft is closed, the first cam rotates and pushes the pin plate downward to insert it into the bottom plate of the circuit breaker drawer. When the opening and closing operation shaft is opened, the first cam returns to its original position, and the pin plate returns to its original position under the action of the tension spring.

[0012] By adopting the above technical solution, which is a mechanical closing interlocking structure, the drawer cannot be electrically rocked out when the circuit breaker is closed.

[0013] The present invention is further configured such that a locking plate is slidably disposed on the upper edge of the housing, and one end of the locking plate is provided with a supporting bend, which overlaps the pin plate. When the pin plate moves upward, the pin plate drives the locking plate to move upward. When the pin plate moves downward, the locking plate moves downward by its own weight and blocks the first operating hole of the drawer drive screw.

[0014] By adopting the above technical solution, when the circuit breaker is closed, the locking plate falls down to block the first operating hole of the drawer drive screw, preventing the handle from being inserted in the working position, thus providing a dual protection function.

[0015] The present invention is further configured such that the housing is provided with a tripping micro switch and a closing micro switch, the tripping micro switch and the closing micro switch are electrically connected to the drive motor, and a second cam is linked to the tripping operation shaft. When the second cam rotates with the tripping operation shaft, it has a first position for triggering the tripping micro switch and a second position for triggering the closing micro switch.

[0016] By adopting the above technical solution, the drive motor can be stopped in time when the opening and closing operation shaft rotates to the closing limit position and the opening limit position, thereby accurately controlling the closing and opening of the circuit breaker.

[0017] The present invention is further configured such that an indicator shaft is rotatably connected to the housing, a sixth gear is linked to the transmission shaft, a seventh gear is linked to the indicator shaft, the sixth gear and the seventh gear mesh with each other, a status indicator plate is provided at the front end of the indicator shaft, and a pointer pointing to the status indicator plate is provided on the housing.

[0018] By adopting the above technical solution, it is easier for staff to determine the position of the drawer, and the drawer can be pushed in when it is in the separated state.

[0019] This utility model is further configured to include a positioning wheel, a positioning spring, a separation micro switch, a connection micro switch, a separation spring, and a connection spring. The positioning wheel is circumferentially mounted on the indicator shaft. The positioning spring includes an arc-shaped positioning protrusion in the middle, elastic arms symmetrically arranged at both ends of the arc-shaped positioning protrusion, and snap-fit ​​portions respectively provided at the ends of the two elastic arms. The housing is provided with two slots for insertion of corresponding snap-fit ​​portions. The arc-shaped positioning protrusion abuts against the outer periphery of the positioning wheel, and the positioning wheel is provided with a first positioning recess for engaging with the arc-shaped positioning protrusion when the drawer is in the separated state and a second positioning recess for engaging with the arc-shaped positioning protrusion when the drawer is in the connected state. The separation micro switch and the connection micro switch are mounted on... Mounted on the housing and electrically connected to the drive motor, the separating spring and the connecting spring are respectively installed on the housing in front of the corresponding separating micro switch and connecting micro switch by fasteners. The ends of the separating spring and the connecting spring are respectively provided with a separating follower block and a connecting follower block. One end face of the positioning wheel is provided with an annular clearance groove for the separating follower block and the connecting follower block to extend into. An arc-shaped trigger block is provided in the annular clearance groove. When the drawer is separated into position, the arc-shaped trigger block pushes the separating follower block, causing the separating spring to deform and triggering the separating micro switch to stop the drive motor. When the drawer is connected into position, the arc-shaped trigger block pushes the connecting follower block, causing the connecting spring to deform and triggering the connecting micro switch to stop the drive motor.

[0020] By adopting the above technical solution, the two springs cooperate with the positioning wheel, which can accurately trigger the micro switches when the positioning wheel cooperates with the two micro switches, and there will be no situation of insufficient or excessive travel. Thus, the motor can be accurately controlled to stop when the drawer is in place. The structure is very reliable. In addition, the positioning structure can also accurately realize the indication of the pointer to the indicator plate.

[0021] The present invention is further configured such that the first clutch includes a first clutch disc, a first spring clip, and a plurality of first clutch balls; a first bushing is rotatably disposed on the outer periphery of the motor shaft of the drive motor; a second gear is rotatably disposed on the upper end of the first bushing; the first clutch disc is rotatably disposed on the outer periphery of the first bushing; the upper end of the first gear is provided with a plurality of first upper conical grooves, the number of which is equivalent to the number of first clutch balls; the lower end of the first clutch disc is provided with a plurality of first lower conical grooves adapted to the first upper conical grooves; a portion of the first clutch balls is disposed in the first lower conical grooves; and another portion of the first clutch balls is disposed in the first upper conical grooves. The upper end of the first clutch disc... The first clutch disc is provided with multiple first clutch protrusions, and the lower end of the second gear is provided with multiple first clutch grooves adapted to the first clutch protrusions. The outer periphery of the first clutch disc is also provided with a first annular groove. The first spring clip is clamped on the outer periphery of the first annular groove, and the first spring clip is provided with a first protrusion limiting part for cooperating with the first electromagnet. When the first electromagnet extends and limits the first protrusion limiting part of the first spring clip, the first clutch ball drives the first clutch disc to move toward the direction closer to the second gear until the first clutch protrusion on the first clutch disc matches the first clutch groove on the second gear, so that the first gear and the second gear rotate synchronously.

[0022] By adopting the above technical solution, the engagement and disengagement control of the first gear and the second gear can be achieved through the cooperation of the first electromagnet and the first clutch. The control structure is simple and ingenious, which is conducive to assembly and production.

[0023] The present invention is further configured such that the second clutch includes a second clutch disc, a second spring clip, and a plurality of second clutch balls; a second bushing is rotatably mounted on the outer periphery of the engagement / disengagement operating shaft; a fifth gear is rotatably mounted on the lower end of the second bushing; the second clutch disc is rotatably mounted on the outer periphery of the second bushing; the upper end of the fifth gear is provided with a plurality of second upper conical grooves, the number of which is equivalent to the number of second clutch balls; the lower end of the second clutch disc is provided with a plurality of second lower conical grooves adapted to the second upper conical grooves; a portion of the second clutch balls is disposed in the second lower conical grooves, and another portion of the second clutch balls is disposed in the second upper conical grooves; the upper end of the second clutch disc is provided with a plurality of... A second clutch protrusion is provided, and the lower end of the linkage disc is provided with a plurality of second clutch grooves adapted to the second clutch protrusion. The outer periphery of the second clutch disc is also provided with a second annular groove. The second spring clip is clamped on the outer periphery of the second annular groove, and the second spring clip is provided with a second protrusion limiting part for cooperating with the second electromagnet. When the second electromagnet extends and limits the second protrusion limiting part of the second spring clip, the second clutch ball drives the second clutch disc to move toward the linkage disc until the second clutch protrusion on the second clutch disc matches the second clutch groove on the linkage disc, so that the fifth gear, the linkage disc and the engagement / disengagement operation shaft rotate synchronously.

[0024] By adopting the above technical solution, the engagement and disengagement control of the fifth gear and the linkage plate can be realized through the cooperation of the second electromagnet and the second clutch, thereby controlling the rotation or stop of the engagement and disengagement operation shaft. The control structure is simple and ingenious, which is conducive to assembly and production. Attached Figure Description

[0025] Figure 1 This is a first perspective view of the entire utility model; Figure 2 This is a schematic diagram of the structure of the present invention after the shell has been removed. Figure 3 This is a schematic diagram of the cooperation structure between the baffle and the drawer drive screw of this utility model; Figure 4 This is a schematic diagram of the installation structure of the pin plate and locking plate of this utility model; Figure 5 This is a second perspective view of the entire utility model; Figure 6 This is a schematic diagram of the transmission structure of the transmission shaft and the indicator shaft of this utility model; Figure 7 This is a first perspective view of the structure of the indicating part of this utility model; Figure 8 This is a second perspective view of the structure of the indicating part of this utility model; Figure 9 This is a schematic diagram of the mating structure of the positioning wheel and the positioning spring of this utility model; Figure 10 This is a schematic diagram of the cooperation structure between the positioning wheel and the two spring pieces of this utility model; Figure 11 This is a schematic diagram of the installation structure of the first clutch of this utility model; Figure 12 for Figure 11 A sectional view of the structure; Figure 13 This is a schematic diagram of the installation structure of the second clutch of this utility model; Figure 14 for Figure 13 A sectional view of the structure.

[0026] In the diagram: 1. Housing; 2. Drive motor; 3. Drawer drive screw; 4. Opening / closing operation shaft; 5. Transmission shaft; 6. Motor shaft; 7. First gear; 8. Second gear; 9. First clutch; 10. Third gear; 11. Fourth gear; 12. Linkage plate; 13. Fifth gear; 14. Second clutch; 15. First electromagnet; 16. Second electromagnet; 17. First operating hole; 18. Second operating hole; 19. Baffle; 20. Manual operation micro switch; 21. First cam; 22. Pin plate; 23. Tension spring; 24. Locking plate; 25. Support bend; 26. Opening micro switch; 27. Closing micro switch; 28. Second cam; 29. ​​Indicator shaft; 30. Sixth gear; 31. Seventh gear; 32. Status indicator plate; 33. Pointer; 34. Positioning wheel; 35. Positioning spring; 36. Disengagement micro switch; 37. Connecting micro switch 39. Separating spring; 40. Connecting spring; 41. Arc-shaped positioning protrusion; 42. Elastic arm; 43. Snap-fit ​​part; 44. Bayonet; 45. First positioning recess; 46. Second positioning recess; 47. Separating follower block; 48. Connecting follower block; 49. Annular clearance groove; 50. Arc-shaped trigger block; 51. First clutch disc; 52. First spring clip; 53. First clutch ball; 54. First bushing; 55. First... 56. Upper conical groove; 57. First lower conical groove; 58. First clutch protrusion; 59. First clutch groove; 60. First protrusion limiting part; 61. Second clutch disc; 62. Second spring clip; 63. Second clutch ball; 64. Second bushing; 65. Second upper conical groove; 66. Second lower conical groove; 67. Second clutch protrusion; 68. Second clutch groove; 69. Second annular groove; 70. Second protrusion limiting part. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Example: As attached Figures 1-14The single-motor control device for the drawer opening and closing and electric operation of a circuit breaker includes a housing 1. The housing 1 houses a drive motor 2, a drawer drive screw 3, an operation shaft 4, and a transmission shaft 5. The drive motor 2 can be controlled by a back-end terminal, such as a PLC controller. A first gear 7 is linked to the motor shaft 6 of the drive motor 2, and a second gear 8 is rotatably mounted thereon. That is, the first gear 7 and the motor shaft 6 achieve circumferential synchronous rotation through a non-circular cross-section engagement. The second gear 8 is rotatably mounted on the motor shaft 6 through a circular cross-section engagement. The first gear 7 and the second gear 8 are engaged by a first clutch 9. A third gear 10, meshing with the second gear 8, is circumferentially linked to the transmission shaft 5. The drawer drive screw 3 is equipped with a third gear 10 that meshes with the second gear 8. The fourth gear 11 meshes with gear 10. A linkage disk 12 is linked to the engagement / disengagement operation shaft 4, and a fifth gear 13 is rotatably mounted thereon. That is, the linkage disk 12 and the engagement / disengagement operation shaft 4 achieve synchronous rotation through a non-circular cross-section fit. The fifth gear 13 and the engagement / disengagement operation shaft 4 achieve rotatable mounting on the engagement / disengagement operation shaft 4 through a circular cross-section fit. The fifth gear 13 meshes with the first gear 7. The linkage disk 12 engages with the fifth gear 13 through a second clutch 14. The housing 1 is also provided with a first electromagnet 15 and a second electromagnet 16. The first electromagnet 15 extends or retracts to control the first clutch 9 to cause the first gear 7 and the second gear 8 to engage or disengage. The second electromagnet 16 extends or retracts to control the second clutch 14 to engage or disengage. When the drawer moves in and out electrically, the motor shaft 6 of the drive motor 2 rotates, energizing the first electromagnet 15, which extends and acts on the first spring clip of the first clutch 9, causing the first clutch 9 to engage. The motor shaft 6 drives the first gear 7 and the second gear 8 to rotate. The second gear 8 drives the third gear 10 on the transmission shaft 5 to rotate, and the third gear 10 drives the fourth gear 11 to rotate, which in turn drives the drawer drive screw 3 to rotate, thus realizing the drawer's entry and exit. When the drawer is in and out, the second electromagnet 16 is de-energized, the second clutch 14 is disengaged, the fifth gear 13 idles, and the engagement / disengagement shaft 4 does not rotate. When the circuit breaker is operated to open or close, the motor shaft 6 of the drive motor 2 rotates, the first electromagnet 15 is energized and extends to act on the second spring clip of the second clutch 14, causing the second clutch 14 to be in a linked state. When the motor shaft 6 drives the first gear 7 to rotate, the first gear 7 drives the fifth gear 13 to rotate, and the fifth gear 13 drives the linkage disc 12 to rotate, which in turn causes the opening / closing operation shaft 4 to rotate, performing the opening / closing operation of the circuit breaker. During the opening / closing operation of the circuit breaker, the first electromagnet 15 is de-energized, the first clutch 9 is in a disengaged state, the second gear 8 does not rotate, and therefore the drawer drive screw 3 does not rotate. This design achieves electric pushing and pushing out of the circuit breaker drawer and electric closing and opening with a single motor, which not only greatly reduces the space occupied by the structure, but also significantly reduces production costs.

[0029] As attached Figure 1 As shown, the front ends of the drawer drive screw 3 and the opening / closing operation shaft 4 are respectively provided with a first operation hole 17 and a second operation hole 18 for inserting a handle. In this embodiment, both the first operation hole 17 and the second operation hole 18 are square holes. This design facilitates manual operation of the drawer drive screw 3 for drawer entry and exit, and manual operation of the opening / closing operation shaft 4 for circuit breaker opening and closing.

[0030] As attached Figure 3 As shown, a baffle 19 is slidably mounted on the housing 1. Specifically, a first sliding hole extending laterally can be provided on the baffle 19. Two pins are installed on the housing, passing through the first sliding hole, with the pin heads providing a limiting position. The housing 1 also has a manual operation micro switch 20 electrically connected to the drive motor 2. One end of the baffle 19 abuts against the spring contact of the manual operation micro switch 20, and the other end of the baffle 19 extends to the front of the first operating hole 17 of the drawer drive screw 3. When the handle is inserted into the first operating hole 17, the baffle 19 slides and triggers the manual operation micro switch 20. The manual operation micro switch 20 sends a signal to the back-end terminal, which then controls the drive motor 2 to stop working. This design prevents the back-end terminal from operating the drive motor 2 when the drawer is manually moved in and out, improving operational safety.

[0031] As attached Figure 4 As shown, it also includes a first cam 21, a pin plate 22, and a tension spring 23. The first cam 21 is circumferentially mounted on the opening and closing operation shaft 4. The pin plate 22 is vertically slidably mounted on the housing 1. A second sliding hole extending vertically can be provided on the housing 1. Two pins are provided on the pin plate 22, and the two pins pass through the second sliding hole, with the pin heads providing a limit. One end of the tension spring 23 is connected to the housing 1, and the other end of the tension spring 23 is connected to the pin plate 22. A hole can be opened on the housing 1 for one end of the tension spring 23 to hook. At the same time, a screw is provided on the pin plate 22 for the other end of the tension spring 23 to hook. When the opening and closing operation shaft 4 is closed, the first cam 21 rotates and pushes the pin plate 22 downward so that it is inserted under the bottom plate of the circuit breaker drawer. When the opening and closing operation shaft 4 is opened, the first cam 21 returns to its original position, and at the same time, the pin plate 22 moves upward and returns to its original position under the action of the tension spring 23. It has a mechanical closing interlocking structure to ensure that the drawer cannot be electrically rocked out when the circuit breaker is closed.

[0032] As attached Figure 4As shown, a locking plate 24 is vertically slidable on the housing 1. A third sliding hole extending vertically can be provided on the housing 1. Two pins are provided on the locking plate 24, passing through the third sliding hole, with the pin heads providing a limit. One end of the locking plate 24 has a supporting bend 25, which overlaps the pin plate 22, specifically the upper end of the screw on the pin plate 22. When the pin plate 22 moves upward, it drives the locking plate 24 upward. When the pin plate 22 moves downward, the locking plate 24 moves downward by its own weight and blocks the first operating hole 17 of the drawer drive screw 3. In the circuit breaker closed state, the locking plate 24 falls down to block the first operating hole 17 of the drawer drive screw 3, preventing the handle from being inserted in the working position, providing a double protection function.

[0033] As attached Figure 5 As shown, the housing 1 is also equipped with a tripping microswitch 26 and a closing microswitch 27. The tripping and closing microswitches 26 and 27 are electrically connected to the drive motor 2. Specifically, when the tripping and closing microswitches 26 and 27 are triggered, they send signals to the back-end terminal. The back-end terminal then sends corresponding instructions to the drive motor 2 to control its stop. A second cam 28 is linked to the tripping operation shaft 4. When the second cam 28 rotates with the tripping operation shaft 4, it has a first position for triggering the tripping microswitch 26 and a second position for triggering the closing microswitch 27. This allows the drive motor 2 to stop working promptly when the tripping operation shaft 4 rotates to the closing limit position and the tripping limit position, thereby precisely controlling the circuit breaker's closing and opening.

[0034] As attached Figure 1 and attached Figure 6 As shown, an indicator shaft 29 is rotatably connected to the housing 1, a sixth gear 30 is linked to the transmission shaft 5, and a seventh gear 31 is linked to the indicator shaft 29. The sixth gear 30 and the seventh gear 31 mesh with each other. The number of teeth of the sixth gear 30 is less than that of the third gear 10 and the seventh gear 31. A status indicator plate 32 is provided at the front end of the indicator shaft 29. The status indicator plate 32 is provided with three status indicators: "Separated," "Connected," and "Test." A pointer 33 is provided on the housing 1, pointing to the status indicator plate 32. This design facilitates the operator in determining the drawer's position; when the drawer is in the separated state, it can be shoved into place.

[0035] As attached Figures 7-10As shown, the device also includes a positioning wheel 34, a positioning spring 35, a disengaging micro switch 36, a connecting micro switch 37, a disengaging spring 39, and a connecting spring 40. The positioning wheel 34 is circumferentially mounted on the indicator shaft 29. The positioning spring 35 includes an arc-shaped positioning protrusion 41 located in the middle, elastic arms 42 symmetrically arranged at both ends of the arc-shaped positioning protrusion 41, and snap-fit ​​portions 43 respectively disposed at the ends of the two elastic arms 42. The housing 1 is provided with two springs respectively for corresponding... The snap-fit ​​part 43 is inserted into the slot 44. The arc-shaped positioning protrusion 41 abuts against the outer periphery of the positioning wheel 34. The positioning wheel 34 is provided with a first positioning recess 45 for engaging with the arc-shaped positioning protrusion 41 when the drawer is in the separated state and a second positioning recess 46 for engaging with the arc-shaped positioning protrusion 41 when the drawer is in the connected state. The separation micro switch 36 and the connection micro switch 37 are mounted on the housing 1 and electrically connected to the drive motor 2. Specifically, the separation micro switch 36 and the connection micro switch 37 are... When switch 37 is triggered, it sends a signal to the back-end terminal, which then sends a corresponding command to the drive motor 2 to stop it. The separating spring 39 and the connecting spring 40 are respectively installed in front of the separating micro switch 36 and the connecting micro switch 37 on the housing 1 by fasteners. The ends of the separating spring 39 and the connecting spring 40 are respectively provided with a separating follower block 47 and a connecting follower block 48. One end face of the positioning wheel 34 is provided with an annular clearance groove 49 for the separating follower block 47 and the connecting follower block 48 to extend into. An arc-shaped trigger block 50 is provided in the annular clearance groove 49. When the drawer is separated, the arc-shaped trigger block 50 pushes the separating follower block 47, causing the separating spring 39 to deform and triggering the separating micro switch 36 to stop the drive motor 2. When the drawer is connected, the arc-shaped trigger block 50 pushes the connecting follower block 48, causing the connecting spring 40 to deform and triggering the connecting micro switch 37 to stop the drive motor 2. The two springs cooperate with the positioning wheel 34, which can accurately trigger the microswitches when the positioning wheel 34 cooperates with the two microswitches, and will not cause the travel to be insufficient or excessive. Thus, the motor is accurately controlled to stop when the drawer is in position. The structure is very reliable. In addition, the positioning structure can also accurately realize the indication of the pointer 33 corresponding to the indicator plate.

[0036] As attached Figure 11 and attached Figure 12As shown, the first clutch 9 includes a first clutch disc 51, a first spring clip 52, and a plurality of first clutch balls 53. A first bushing 54 is rotatably mounted on the outer periphery of the motor shaft 6 of the drive motor 2. The second gear 8 is rotatably mounted on the upper end of the first bushing 54. A first step can be provided on the upper end of the first bushing 54. A limiting nut is threaded onto the motor shaft 6, and the limiting nut restricts the second gear 8 onto the second step. The first clutch disc 51 is rotatably mounted on the outer periphery of the first bushing 54. The upper end of the first gear 7 has a plurality of first upper conical grooves 55, the number of which is equivalent to the number of first clutch balls 53. The lower end of the first clutch disc 51 has a plurality of first lower conical grooves 56 adapted to the first upper conical grooves 55. Part of the first clutch balls 53 are disposed in the first lower conical grooves 56, and the other part of the first clutch balls 53 are disposed in the first upper conical grooves 55. The upper end of the first clutch disc 51 is provided with multiple first clutch protrusions 57, and the lower end of the second gear 8 is provided with multiple first clutch grooves 58 for matching the first clutch protrusions 57. The outer periphery of the first clutch disc 51 is also provided with a first annular groove 59. The first spring clip 52 is clamped on the outer periphery of the first annular groove 59, and the first spring clip 52 is provided with a first protrusion limiting part 60 for cooperating with the first electromagnet 15. When the first electromagnet 15 extends and limits the first protrusion limiting part 60 of the first spring clip 52, the first clutch ball 53 drives the first clutch disc 51 to move toward the direction close to the second gear 8, and the first clutch ball 53 will never disengage from the first upper conical groove 55 and the first lower conical groove 56 until the first clutch protrusion 57 on the first clutch disc 51 engages with the first clutch groove 58 on the second gear 8, so that the first gear 7 and the second gear 8 rotate synchronously. The engagement and disengagement control of the first gear 7 and the second gear 8 can be achieved by the cooperation of the first electromagnet 15 and the first clutch 9. The control structure is simple and ingenious, which is conducive to assembly and production.

[0037] As attached Figure 13 and attached Figure 14As shown, the second clutch 14 includes a second clutch disc 61, a second spring clip 62, and a plurality of second clutch balls 63. A second bushing 64 is rotatably mounted on the outer periphery of the engagement / disengagement shaft 4. The fifth gear 13 is rotatably mounted on the lower end of the second bushing 64. The second clutch disc 61 is rotatably mounted on the outer periphery of the second bushing 64. The upper end of the fifth gear 13 has a plurality of second upper conical grooves 65, the number of which is equivalent to the number of second clutch balls 63. The lower end of the second clutch disc 61 has a plurality of second lower conical grooves 66 that are adapted to the second upper conical grooves 65. Both the second upper conical grooves 65 and the second lower conical grooves 66 are conical in shape. Part of the second clutch ball 63 is disposed in the second lower conical groove 66, and the other part of the second clutch ball 63 is disposed in the second upper conical groove 65. The upper end of the second clutch disc 61 has a plurality of second clutch protrusions 67. The lower end of the linkage disc 12 is provided with a plurality of second clutch grooves 68 for matching the second clutch protrusion 67. The outer periphery of the second clutch disc 61 is also provided with a second annular groove 69. The second spring clip 62 is clamped on the outer periphery of the second annular groove 69, and the second spring clip 62 is provided with a second protrusion limiting part 70 for cooperating with the second electromagnet 16. When the second electromagnet 16 extends and limits the second protrusion limiting part 70 of the second spring clip 62, the second clutch ball 63 drives the second clutch disc 61 to move toward the linkage disc 12, and the second clutch ball 63 will never disengage from the second upper conical groove 65 and the second lower conical groove 66 until the second clutch protrusion 67 on the second clutch disc 61 engages with the second clutch groove 68 on the linkage disc 12, so that the fifth gear 13, the linkage disc 12 and the engagement / disengagement operation shaft 4 rotate synchronously. The engagement and disengagement of the fifth gear 13 and the linkage disc 12 can be achieved by the cooperation of the second electromagnet 16 and the second clutch 14, thereby controlling the rotation or stop of the engagement and disengagement operation shaft 4. The control structure is simple and ingenious, which is conducive to assembly and production.

Claims

1. A device for controlling the opening and closing of a circuit breaker drawer and its electric closing and opening by a single motor, characterized in that: The device includes a housing (1), on which a drive motor (2), a drawer drive screw (3), a splitting / engaging operation shaft (4), and a transmission shaft (5) are mounted. A first gear (7) is mounted on the motor shaft (6) of the drive motor (2), and a second gear (8) is rotatably mounted thereon. The first gear (7) and the second gear (8) are engaged by a first clutch (9). A third gear (10) meshing with the second gear (8) is mounted on the transmission shaft (5). A fourth gear (11) meshing with the third gear (10) is mounted on the drawer drive screw (3). The splitting / engaging operation shaft (4)... A linkage disc (12) is mounted on the shaft (4) and a fifth gear (13) is rotatably mounted thereon. The fifth gear (13) meshes with the first gear (7). The linkage disc (12) engages with the fifth gear (13) through a second clutch (14). The housing (1) is also provided with a first electromagnet (15) and a second electromagnet (16). The first electromagnet (15) extends or retracts to control the first clutch (9) to cause the first gear (7) and the second gear (8) to engage or disengage. The second electromagnet (16) extends or retracts to control the second clutch (14) to engage or disengage.

2. The device for controlling the drawer movement and electric closing / opening of a circuit breaker by a single motor according to claim 1, characterized in that: The front ends of the drawer drive screw (3) and the split operation shaft (4) are respectively provided with a first operation hole (17) and a second operation hole (18) for inserting a handle.

3. The device for controlling the drawer entry and exit and electric closing and opening of a circuit breaker controlled by a single motor according to claim 2, characterized in that: A baffle (19) is slidably disposed on the housing (1), and a manual operation micro switch (20) electrically connected to the drive motor (2) is also provided on the housing (1). One end of the baffle (19) abuts against the spring of the manual operation micro switch (20), and the other end of the baffle (19) extends to the front of the first operation hole (17) of the drawer drive screw (3). When the handle is inserted into the first operation hole (17), the baffle (19) slides and triggers the manual operation micro switch (20), so that the drive motor (2) does not work.

4. The device for controlling the drawer entry and exit and electric closing and opening of a circuit breaker controlled by a single motor according to claim 1, characterized in that: It also includes a first cam (21), a pin plate (22), and a tension spring (23). The first cam (21) is linked and installed on the opening and closing operation shaft (4). The pin plate (22) is slidably disposed on the housing (1) in a vertical direction. One end of the tension spring (23) is connected to the housing (1), and the other end of the tension spring (23) is connected to the pin plate (22). When the opening and closing operation shaft (4) is closed, the first cam (21) rotates and pushes the pin plate (22) downward so that it is inserted into the bottom plate of the circuit breaker drawer. When the opening and closing operation shaft (4) is opened, the first cam (21) returns to its original position, and at the same time, the pin plate (22) moves upward and returns to its original position under the action of the tension spring (23).

5. The device for controlling the drawer movement and electric closing / opening of a circuit breaker by a single motor according to claim 4, characterized in that: A locking plate (24) is vertically slidably mounted on the housing (1). One end of the locking plate (24) is provided with a support bend (25). The support bend (25) overlaps the pin plate (22). When the pin plate (22) moves upward, the pin plate (22) drives the locking plate (24) to move upward. When the pin plate (22) moves downward, the locking plate (24) moves downward by its own weight and blocks the first operating hole (17) of the drawer drive screw (3).

6. The device for controlling the drawer entry and exit and electric closing and opening of a circuit breaker by a single motor according to claim 1, characterized in that: The housing (1) is also provided with a tripping micro switch (26) and a closing micro switch (27). The tripping micro switch (26) and the closing micro switch (27) are electrically connected to the drive motor (2). A second cam (28) is linked to the tripping operation shaft (4). When the second cam (28) rotates with the tripping operation shaft (4), it has a first position to trigger the tripping micro switch (26) and a second position to trigger the closing micro switch (27).

7. The device for controlling the drawer entry and exit and electric closing and opening of a circuit breaker by a single motor according to claim 1, characterized in that: An indicator shaft (29) is rotatably connected to the housing (1), a sixth gear (30) is linked to the transmission shaft (5), a seventh gear (31) is linked to the indicator shaft (29), the sixth gear (30) and the seventh gear (31) mesh with each other, a status indicator plate (32) is provided at the front end of the indicator shaft (29), and a pointer (33) pointing to the status indicator plate (32) is provided on the housing (1).

8. The device for controlling the drawer entry and exit and electric closing and opening of a circuit breaker controlled by a single motor according to claim 7, characterized in that: It also includes a positioning wheel (34), a positioning spring (35), a separation micro switch (36), a connecting micro switch (37), a separation spring (39), and a connecting spring (40). The positioning wheel (34) is circumferentially mounted on the indicator shaft (29). The positioning spring (35) includes an arc-shaped positioning protrusion (41) located in the middle, elastic arms (42) symmetrically arranged at both ends of the arc-shaped positioning protrusion (41), and snap-fit ​​portions (43) respectively arranged at the ends of the two elastic arms (42). The housing (1) It is provided with two slots (44) for inserting into the corresponding latching part (43), the arc-shaped positioning protrusion (41) abuts against the outer periphery of the positioning wheel (34), and the positioning wheel (34) is provided with a first positioning recess (45) for engaging with the arc-shaped positioning protrusion (41) when the drawer is in the separated state and a second positioning recess (46) for engaging with the arc-shaped positioning protrusion (41) when the drawer is in the connected state; the separation micro switch (36) and the connection micro switch (37) are installed on the housing (1) The separation spring (39) and the connecting spring (40) are respectively mounted on the housing (1) in front of the separation micro switch (36) and the connecting micro switch (37) by fasteners. The ends of the separation spring (39) and the connecting spring (40) are respectively provided with a separation follower block (47) and a connecting follower block (48). One end face of the positioning wheel (34) is provided with an annular clearance for the separation follower block (47) and the connecting follower block (48) to extend into. The annular clearance groove (49) is provided with an arc-shaped trigger block (50). When the drawer is separated into place, the arc-shaped trigger block (50) pushes the separation follower block (47), causing the separation spring (39) to deform and triggering the separation micro switch (36) to stop the drive motor (2). When the drawer is connected into place, the arc-shaped trigger block (50) pushes the connection follower block (48), causing the connection spring (40) to deform and triggering the connection micro switch (37) to stop the drive motor (2).

9. The device for controlling the drawer entry and exit and electric closing and opening of a circuit breaker by a single motor according to claim 1, characterized in that: The first clutch (9) includes a first clutch disc (51), a first spring clip (52), and a plurality of first clutch balls (53). A first bushing (54) is rotatably mounted on the outer periphery of the motor shaft (6) of the drive motor (2). The second gear (8) is rotatably mounted on the upper end of the first bushing (54). The first clutch disc (51) is rotatably mounted on the outer periphery of the first bushing (54). The upper end of the first gear (7) is provided with a plurality of first upper conical grooves (55) with a number equivalent to the number of first clutch balls (53). The lower end of the first clutch disc (51) is provided with a plurality of first lower conical grooves (56) that are adapted to the first upper conical grooves (55). Part of the first clutch ball (53) is disposed in the first lower conical groove (56), and the other part of the first clutch ball (53) is disposed in the first upper conical groove (55). The upper end of the first clutch disc (51) is provided with a plurality of first clutch balls. The first clutch protrusion (57) and the second gear (8) are provided with a plurality of first clutch grooves (58) at the lower end for matching the first clutch protrusion (57). The first clutch disc (51) is also provided with a first annular groove (59) on its outer periphery. The first spring clip (52) is clamped on the outer periphery of the first annular groove (59), and the first spring clip (52) is provided with a first protrusion limiting part (60) for cooperating with the first electromagnet (15). When the first electromagnet (15) extends out and limits the first protrusion limiting part (60) of the first spring clip (52), the first clutch ball (53) drives the first clutch disc (51) to move toward the direction close to the second gear (8) until the first clutch protrusion (57) on the first clutch disc (51) and the first clutch groove (58) on the second gear (8) are engaged, so that the first gear (7) and the second gear (8) rotate synchronously.

10. The device for controlling the drawer entry and exit and electric closing and opening of a circuit breaker controlled by a single motor according to claim 1, characterized in that: The second clutch (14) includes a second clutch disc (61), a second spring clip (62), and a plurality of second clutch balls (63). A second bushing (64) is rotatably mounted on the outer periphery of the engagement / disengagement shaft (4). The fifth gear (13) is rotatably mounted on the lower end of the second bushing (64). The second clutch disc (61) is rotatably mounted on the outer periphery of the second bushing (64). The upper end of the fifth gear (13) is provided with a plurality of second upper conical grooves (65) in a number equivalent to the number of second clutch balls (63). The lower end of the second clutch disc (61) is provided with a plurality of second lower conical grooves (66) that are adapted to the second upper conical grooves (65). Part of the second clutch balls (63) are disposed in the second lower conical grooves (66), and the other part of the second clutch balls (63) are disposed in the second upper conical grooves (65). The upper end of the second clutch disc (61) is provided with a plurality of second clutch protrusions (67). The lower end of the linkage disc (12) is provided with a plurality of second clutch grooves (68) for matching the second clutch protrusion (67). The outer periphery of the second clutch disc (61) is also provided with a second annular groove (69). The second spring clip (62) is clamped on the outer periphery of the second annular groove (69), and the second spring clip (62) is provided with a second protrusion limiting part (70) for cooperating with the second electromagnet (16). When the second electromagnet (16) extends out and limits the second protrusion limiting part (70) of the second spring clip (62), the second clutch ball (63) drives the second clutch disc (61) to move toward the linkage disc (12) until the second clutch protrusion (67) on the second clutch disc (61) and the second clutch groove (68) on the linkage disc (12) are engaged, so that the fifth gear (13), the linkage disc (12) and the engagement / disengagement operation shaft (4) rotate synchronously.

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