electrically operated mechanism

Abstract

The application provides an electric operating mechanism, which comprises a shell, a clutch assembly and a toggle block assembly; the clutch assembly comprises a gear set mechanism, an electromagnetic mechanism and a planetary transmission mechanism; the planetary transmission mechanism comprises a first gear, a first rotating shaft, a positioning wheel, a gear ring and a plurality of planetary gears; the gear set mechanism drives the first gear to rotate; the gear ring is arranged on the first rotating shaft; the gear ring drives the toggle block assembly to move; the positioning wheel is provided with a plurality of second rotating shafts in the same direction as the first rotating shaft; the planetary gears are arranged on the second rotating shafts; the planetary gears are engaged with the gear ring; the first gear is engaged with at least one planetary gear; the electromagnetic mechanism can brake or release the positioning wheel; the positioning wheel comprises a static state and a rotatable state; when the electromagnetic mechanism brakes the positioning wheel, the positioning wheel is in the static state; the planetary gears rotate around the second rotating shafts and drive the gear ring to rotate; when the electromagnetic mechanism releases the positioning wheel, the positioning wheel is in the rotatable state; the planetary gears rotate around the gear ring; and the gear ring is static.

Description

Technical Field

[0001] This invention relates to the field of electric operating mechanism technology, and more specifically to an electric operating mechanism. Background Technology

[0002] A circuit breaker is a switching device that can close, carry, and interrupt current under normal circuit conditions, and can close, carry, and interrupt current under abnormal circuit conditions within a specified time. The electric operating mechanism is a special accessory for circuit breakers, which can control the closing or opening of the circuit breaker.

[0003] Currently, most electric operating mechanisms on the market use a single gear to drive a toggle block to push the circuit breaker handle to achieve circuit breaker opening and closing operations. However, DC circuit breakers used in new energy, energy storage batteries, and other fields typically use two-pole DC circuit breakers, which are narrower and have a larger stroke. Given the requirement that the circuit breaker's external dimensions cannot be exceeded, the traditional cam-driven, clockwise unidirectional clutch structure can no longer meet this design requirement. Therefore, a bidirectional clutch assembly that can be coupled in both forward and reverse rotation of the electric drive is needed to adapt to these types of circuit breakers. Furthermore, electric operating mechanisms often include a manual drive assembly for manual circuit breaker opening and closing operations; therefore, the bidirectional clutch assembly should also have a corresponding disengagement function. Summary of the Invention

[0004] The purpose of this invention is to provide an electric operating mechanism to solve the above-mentioned problems.

[0005] The technical solution adopted in this invention is as follows:

[0006] An electric operating mechanism includes a housing, within which a clutch assembly and a toggle block assembly are disposed, the toggle block assembly being used to control the opening and closing of a circuit breaker;

[0007] The clutch assembly includes a gear set mechanism, an electromagnetic mechanism, and a planetary transmission mechanism. The planetary transmission mechanism includes a first gear, a first rotating shaft, a positioning wheel, a gear ring, and several planetary gears.

[0008] The gear set mechanism drives the first gear to rotate. The gear ring is set on the first rotating shaft. The gear ring drives the toggle block assembly to move. The positioning wheel is provided with several second rotating shafts in the same direction as the first rotating shaft. The planetary gears are set on the second rotating shafts and mesh with the gear ring. The first gear meshes with at least one planetary gear. The electromagnetic mechanism can brake or release the positioning wheel. The positioning wheel includes a stationary state and a rotatable state.

[0009] When the electromagnetic mechanism brakes the positioning wheel, the positioning wheel is stationary, and the planetary gear rotates around the second axis and drives the gear ring to rotate.

[0010] When the electromagnetic mechanism releases the positioning wheel, the positioning wheel is in a rotatable state, the planetary gear rotates around the gear ring, and the gear ring remains stationary.

[0011] As a further improvement of the present invention, the outer side wall of the positioning wheel is provided with a plurality of braking grooves, and the electromagnetic mechanism includes a drive source and a braking block, wherein the drive source drives the braking block to insert into or exit the braking groove.

[0012] As a further improvement of the present invention, the surfaces of the brake groove and the brake block near the positioning wheel are both arc surfaces coaxial with the positioning wheel.

[0013] As a further improvement of the present invention, the brake block is also connected to a return spring, which is used to reset the brake block.

[0014] As a further improved technical solution of the present invention, the gear ring has internal teeth, the gear ring, the first gear and the positioning wheel are coaxial, there are three planetary gears and they are evenly distributed in the circumference, and the first gear extends into the gear ring and meshes with all the planetary gears.

[0015] As a further improvement of the present invention, a second gear is provided on the gear ring, and the second gear rotates synchronously with the gear ring;

[0016] The actuating block assembly includes a base plate, an actuating block disposed on the base plate, and a first rack. The second gear meshes with the first rack. The actuating block is used to drive the circuit breaker handle to perform opening or closing operations.

[0017] As a further improved technical solution of the present invention, a manual drive assembly is also provided inside the housing. The manual drive assembly includes a third rotating shaft, a turntable and a fifth gear. The third rotating shaft is in the same direction as the first rotating shaft. The turntable and the fifth gear are disposed on the third rotating shaft. The third rotating shaft, the turntable and the fifth gear rotate synchronously. The fifth gear meshes with the second gear.

[0018] The base plate is also provided with a second rack that is parallel to and opposite to the first rack, and the fifth gear meshes with the second rack.

[0019] As a further improvement of the present invention, the housing is provided with a window facing the lock hole of the turntable. The manual drive assembly also includes a slide plate slidably disposed on the housing and a first micro switch disposed inside the housing. The slide plate is used to cover the window. A contact block is disposed on the slide plate. The first micro switch is disposed on the movement trajectory of the contact block. When the slide plate is slid, the slide plate drives the contact block to move so that the first micro switch is closed or opened. The first micro switch is used to mark the position of the slide plate.

[0020] As a further improvement of the present invention, the turntable is provided with a clearance groove, and the housing is also provided with a second micro switch and a third micro switch. The second micro switch and the third micro switch are arranged on the rotation path of the clearance groove. When the second micro switch / third micro switch is in the clearance groove, the second micro switch / third micro switch is open; otherwise, the turntable causes the second micro switch / third micro switch to close. The second micro switch / third micro switch is used to indicate the opening and closing of the circuit breaker.

[0021] As a further improved technical solution of the present invention, the gear set mechanism includes a motor, a third gear and a fourth gear, the third gear is driven by the motor, the fourth gear meshes with the third gear, and the fourth gear is connected to the first gear and rotates synchronously.

[0022] The beneficial effects of this invention are as follows:

[0023] With the above structure, a bidirectional clutch that can be coupled regardless of whether the motor rotates forward or backward is achieved during electric drive, limiting the travel distance to within the safe dimensions of the circuit breaker. The electromagnetic mechanism enables the disengagement of the clutch assembly, thereby improving the safety of the electric operating mechanism. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the external structure of the electric operating mechanism;

[0025] Figure 2 This is a schematic diagram of the connection between the electric operating mechanism and the circuit breaker;

[0026] Figure 3 This is a front view of the clutch assembly;

[0027] Figure 4 This is a schematic diagram of the back of the clutch assembly;

[0028] Figure 5 This is a schematic diagram of a planetary transmission mechanism;

[0029] Figure 6 This is a structural diagram of the manually driven component;

[0030] Figure 7 This is the main view of the manually driven component.

[0031] Wherein: 1-Circuit breaker handle, 2-Housing, 3-Electromagnetic mechanism, 301-Brake block, 302-Guide rod, 303-Reset spring, 4-First gear, 5-First shaft, 6-Positioning wheel, 601-Through hole, 602-Second shaft, 603-Brake groove, 7-Gear ring, 8-Planetary gear, 9-Motor, 10-Third gear, 11-Fourth gear, 12-Second gear, 13-Third shaft, 14-Turntable, 1401-Relief groove, 15-Fifth gear, 16-Base plate, 17-Toggle block, 18-First rack, 19-Second rack, 20-Slide plate, 2001-Pushing part, 2002-Contact block, 21-First micro switch, 22-Second micro switch, 23-Third micro switch. Detailed Implementation

[0032] The present invention will now be described in detail with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the scope of protection of the present invention.

[0033] If the description of this invention involves orientation (e.g., up, down, left, right, front, back, outside, inside, etc.), then the orientations involved need to be defined. For example, "To clearly express the positions and directions described in this invention, the end closer to the operator is the proximal end, and the end farther from the operator is the distal end," or the paper surface can be used as a reference. Of course, if the positional relationship between the two is defined by mutual reference in the subsequent description, then this definition is not necessary.

[0034] An electric operating mechanism, such as Figures 1-2 As shown, the circuit breaker includes a housing 2, which contains a clutch assembly, a manual drive assembly, and a toggle block assembly. The toggle block assembly is driven by the clutch assembly / manual drive assembly and drives the circuit breaker handle 1 to perform opening or closing actions.

[0035] like Figures 3-5 As shown, the clutch assembly includes a gear set mechanism, an electromagnetic mechanism 3, and a planetary transmission mechanism. The planetary transmission mechanism includes a first gear 4, a first rotating shaft 5, a positioning wheel 6, a gear ring 7, and several planetary gears 8.

[0036] The gear set mechanism drives the first gear 4 to rotate. The gear ring 7 is disposed on the first rotating shaft 5. The gear ring 7 drives the toggle block assembly to move. The positioning wheel 6 includes a through hole 601 located at its center. The first rotating shaft 5 passes through the through hole 601. The positioning wheel 6 is provided with a plurality of second rotating shafts 602 in the same direction as the first rotating shaft 5. The planetary gears 8 are disposed on the second rotating shafts 602. The number of planetary gears 8 corresponds one-to-one with the number of second rotating shafts 602. The planetary gears 8 mesh with the gear ring 7. The first gear 4 meshes with at least one planetary gear 8. The electromagnetic mechanism 3 can brake or release the positioning wheel 6. The positioning wheel 6 includes a stationary state and a rotatable state.

[0037] When the electromagnetic mechanism 3 brakes the positioning wheel 6, the positioning wheel 6 is in a stationary state, and the planetary gear 8 rotates around the second rotating shaft 602 and drives the gear ring 7 to rotate.

[0038] When the electromagnetic mechanism 3 releases the positioning wheel 6, the positioning wheel 6 is in a rotatable state, and the planetary gear 8 and the second rotating shaft 602 rotate around the gear ring 7, that is, rotate along the teeth of the gear ring 7, while the gear ring 7 remains stationary.

[0039] The gear set mechanism includes a motor 9, a third gear 10, and a fourth gear 11. The third gear 10 is driven to rotate by the motor 9. The fourth gear 11 meshes with the third gear 10. The fourth gear 11 is connected to the first gear 4 and rotates synchronously. The meshing of the third gear 10 and the fourth gear 11 is used to transmit driving force. The fourth gear 11 is used to output driving force to the first gear 4.

[0040] The outer side wall of the positioning wheel 6 is provided with a plurality of braking grooves 603. The electromagnetic mechanism 3 includes a drive source, a guide rod 302 and a brake block 301. The guide rod 302 is connected to the brake block 301. The drive source drives the guide rod 302 to extend or retract, thereby causing the brake block 301 to insert or exit the brake groove 603, so as to brake or release the positioning wheel 6.

[0041] The brake block 301 is also connected to a return spring 303, which is used to reset the brake block 301. The surfaces of the brake groove 603 and the brake block 301 near the positioning wheel 6 are both coaxial arc surfaces, conforming to the shape of the outer wall of the positioning wheel 6 and using the same curvature to avoid wear on the brake block 301 or the positioning wheel 6 during the process of inserting or removing the brake block 301 from the brake groove 603. The axial width d of the brake block 301 inserted into the brake groove 603 is smaller than the axial width D of the brake groove 603, facilitating the return spring to remove the brake block 301 from the positioning wheel 6 without hindering the circuit breaker's rapid opening or closing.

[0042] In this embodiment, the gear ring 7 has internal teeth, the gear ring 7, the first gear 4, and the positioning wheel 6 are coaxial, and there are three planetary gears 8 that are evenly distributed circumferentially on the gear ring 7. The first gear 4 extends into the gear ring 7 and meshes with all the planetary gears 8. The triangular structure has a good supporting and stabilizing effect as well as a gear transmission effect.

[0043] In addition, the gear ring 7 may also have external teeth, as long as they can achieve the corresponding meshing function.

[0044] The first rotating shaft 5 is also provided with a second gear 12. A connecting piece is provided between the second gear 12 and the gear ring 7 so that the second gear 12 and the gear ring 7 rotate synchronously. The second gear 12, the connecting piece, and the gear ring 7 can be integrated to facilitate installation and disassembly.

[0045] like Figures 6-7 As shown, the manual drive assembly includes a third rotating shaft 13, a turntable 14, and a fifth gear 15. The third rotating shaft 13 is in the same direction as the first rotating shaft 5. The turntable 14 and the fifth gear 15 are disposed on the third rotating shaft 13. The third rotating shaft 13, the turntable 14, and the fifth gear 15 rotate synchronously. The fifth gear 15 meshes with the second gear 12.

[0046] The actuating block assembly includes a base plate 16, on which an actuating block 17, a first rack 18, and a second rack 19 are disposed. The first rack 18 and the second rack 19 are parallel and opposite to each other. The second gear 12 meshes with the first rack 18, and the fifth gear 15 meshes with the second rack 19. The actuating block 17 has a rectangular frame structure. The actuating block 17 is sleeved on the circuit breaker handle 1 and drives the circuit breaker handle 1 to move during movement to perform opening or closing operations.

[0047] Whether driven electrically, with the second gear 12 acting as the driving wheel to rotate the fifth gear 15, or driven manually, with the turntable 14 driving the fifth gear 15 to rotate, and the fifth gear 15 acting as the driving wheel to rotate the second gear 12, the meshing of the second gear 12 with the first rack 18 and the meshing of the fifth gear 15 with the second rack 19 can move the base plate 16 and the actuating block 17. By rotating the motor 9 / turntable 14 forward or backward, the actuating block 17 can move in different directions, thereby realizing the opening or closing operation of the circuit breaker. The dual-rack, dual-gear synchronous drive structure effectively reduces motion friction, improves motion smoothness, increases driving efficiency, and enhances overall structural strength.

[0048] During the electric drive closing or opening operation, the planetary transmission mechanism and electromagnetic mechanism 3 are used to insert the brake block 301 into the brake groove 603 of the positioning wheel 6, restricting the rotation of the positioning wheel 6. The positioning wheel 6 is in a stationary state. When the third gear 10 rotates, it meshes with the fourth gear 11 to rotate. The fourth gear 11 drives the first gear 4 to rotate. The first gear 4 drives the planetary gear 8 to rotate. Since the positioning wheel 6 is restricted from rotating, it acts as a rotating support. The planetary gear 8 rotates around the second rotating shaft 602, driving the gear ring 7 and the second gear 12 to rotate. The second gear 12 drives the fifth gear 15 to rotate. The second gear 12 and the fifth gear 15 together drive the toggle block assembly to move to realize the closing or opening operation of the circuit breaker.

[0049] During manual closing or opening operations, the electromagnetic mechanism 3 is first controlled to disengage the brake block 301 from the brake groove 603 of the positioning wheel 6. At this time, the positioning wheel 6 can rotate freely. Even if the motor 9 is accidentally turned due to remote touch, the third gear 10 will mesh with the fourth gear 11, which will then drive the first gear 4 to rotate. The first gear 4 will drive the planetary gear 8 to rotate. Since the positioning wheel 6 is in a rotatable state, the gear ring 7 serves as the rotating support. The planetary gear 8 and the second gear rotate along the teeth of the gear ring 7, making a motion along the circumference of the gear ring 7. The second gear 12 is stationary with the gear ring 7, and the fifth gear 15 and the toggle block assembly are stationary. That is, the clutch assembly is disengaged from the toggle block assembly and the manual drive assembly. Therefore, the circuit breaker handle 1 will not perform closing or opening operations due to the rotation of the motor 9, thus improving operational safety. If a closing or opening operation is required, with the motor 9 stopped, the turntable 14 is rotated to drive the fifth gear 15 to rotate. The fifth gear 15 drives the second gear 12 to rotate, the second gear 12 drives the first rack 18 to move, and the fifth gear 15 drives the second rack 19 to move, thereby realizing the movement of the toggle block 17. The toggle block 17 then drives the circuit breaker handle 1 to perform a closing or opening operation. Furthermore, since the positioning wheel 6 can rotate freely, the second gear 12 drives the gear ring 7 to rotate synchronously, the gear ring 7 drives the planetary gear 8 to rotate, and the planetary gear 8 rotates around the first gear 4 while the first gear 4 remains stationary. This reduces the operating force required for manual closing and opening, improving the convenience of manual operation.

[0050] The housing 2 has a window facing the lock hole of the turntable 14. The manual drive assembly also includes a slide plate 20 slidably mounted on the housing 2, and a first micro switch 21, a second micro switch 22, and a third micro switch 23. The slide plate 20 is used to cover the window. The slide plate 20 is provided with a pushing part 2001. Applying external force to the pushing part 2001 moves the slide plate 20, that is, opens or closes the window. This provides dust and collision protection for the components inside the housing 2, and also facilitates the operation of the turntable 14.

[0051] The bottom of the slide plate 20 is provided with a contact block 2002. When the slide plate 20 moves, it drives the contact block 2002 to move. The first micro switch 21 is provided on the movement trajectory of the contact block 2002. When the slide plate 20 is slid, the slide plate 20 drives the contact block 2002 to move so that the first micro switch 21 is closed or opened. The first micro switch 21 is used to identify the position of the slide plate 20, thereby indicating that the window is in an open or closed state.

[0052] A clearance groove 1401 is provided on the outer edge of the turntable 14. When the turntable 14 rotates, the relative position of the clearance groove 1401 and other components also changes. The second micro switch 22 and the third micro switch 23 are arranged on the rotation path of the clearance groove 1401. When the second micro switch 22 / third micro switch 23 is in the clearance groove 1401, the second micro switch 22 / third micro switch 23 is open. Otherwise, the turntable 14 causes the second micro switch 22 / third micro switch 23 to close. Since the third rotating shaft 13 rotates synchronously with the fifth gear 15, the second micro switch 22 / third micro switch 23 is used to indicate the open and closed state of the circuit breaker.

[0053] Through the above structure, the present invention transforms the traditional one-way clutch that rotates in one direction into a two-way clutch structure that can be coupled in both forward and reverse directions, whether electric or manual. It limits the operating stroke to within the safe size of the circuit breaker, improving the flexibility of closing or opening. The disengagement function of the clutch component is realized through the electromagnetic mechanism, which improves the safety of the electric operating mechanism during use. At the same time, the double rack and double gear drive structure reduces the manual operating force. The structure is simple, low in cost, and highly efficient.

[0054] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0055] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. All equivalent embodiments or modifications made without departing from the spirit of the present invention should be included within the scope of protection of the present invention.

Claims

1. An electrically operated mechanism, comprising a housing (2), characterized in that: The housing (2) is provided with a clutch assembly and a toggle block assembly, the toggle block assembly being used to control the opening and closing of the circuit breaker; The clutch assembly includes a gear set mechanism, an electromagnetic mechanism (3) and a planetary transmission mechanism. The planetary transmission mechanism includes a first gear (4), a first rotating shaft (5), a positioning wheel (6), a gear ring (7) and several planetary gears (8). The gear set mechanism drives the first gear (4) to rotate. The gear ring (7) is set on the first rotating shaft (5). The gear ring (7) drives the toggle block assembly to move. The positioning wheel (6) is provided with several second rotating shafts (602) in the same direction as the first rotating shaft (5). The planetary gear (8) is set on the second rotating shaft (602). The planetary gear (8) meshes with the gear ring (7). The first gear (4) meshes with at least one planetary gear (8). The electromagnetic mechanism (3) can brake or release the positioning wheel (6). The positioning wheel (6) includes a stationary state and a rotatable state. The outer side wall of the positioning wheel (6) is provided with several brake grooves (603). The electromagnetic mechanism (3) includes a drive source and a brake block (301). The drive source drives the brake block (301) to insert into or exit the brake groove (603). When the electromagnetic mechanism (3) brakes the positioning wheel (6), the positioning wheel (6) is in a stationary state, and the planetary gear (8) rotates around the second rotating shaft (602) and drives the gear ring (7) to rotate; When the electromagnetic mechanism (3) releases the positioning wheel (6), the positioning wheel (6) is in a rotatable state, the planetary gear (8) rotates around the gear ring (7), and the gear ring (7) is stationary; A second gear (12) is provided on the gear ring (7), and the second gear (12) rotates synchronously with the gear ring (7); The actuating block assembly includes a base plate (16), an actuating block (17) disposed on the base plate (16), and a first rack (18). The second gear (12) meshes with the first rack (18). The actuating block (17) is used to drive the circuit breaker handle (1) to perform opening or closing operations. The housing (2) is also provided with a manual drive assembly, which includes a third rotating shaft (13), a turntable (14) and a fifth gear (15). The third rotating shaft (13) is in the same direction as the first rotating shaft (5). The turntable (14) and the fifth gear (15) are disposed on the third rotating shaft (13). The third rotating shaft (13), the turntable (14) and the fifth gear (15) rotate synchronously. The fifth gear (15) meshes with the second gear (12). The base plate (16) is also provided with a second rack (19) that is parallel to and opposite to the first rack (18), and the fifth gear (15) meshes with the second rack (19).

2. The electric operating mechanism according to claim 1, characterized in that: The surfaces of the brake groove (603) and the brake block (301) near the positioning wheel (6) are both arc surfaces coaxial with the positioning wheel (6).

3. The electric operating mechanism according to claim 1, characterized in that: The brake block (301) is also connected to a return spring (303), which is used to reset the brake block (301).

4. The electric operating mechanism according to claim 1, characterized in that: The gear ring (7) has internal teeth. The gear ring (7), the first gear (4), and the positioning wheel (6) are coaxial. There are three planetary gears (8) and they are evenly distributed around the circumference. The first gear (4) extends into the gear ring (7) and meshes with all the planetary gears (8).

5. The electric operating mechanism according to claim 1, characterized in that: The housing (2) is provided with a window facing the lock hole of the turntable (14). The manual drive assembly also includes a slide plate (20) slidably disposed on the housing (2) and a first micro switch (21) disposed inside the housing (2). The slide plate (20) is used to cover the window. A contact block (2002) is provided on the slide plate (20). The first micro switch (21) is disposed on the movement trajectory of the contact block (2002). When the slide plate (20) is slid, the slide plate (20) drives the contact block (2002) to move so that the first micro switch (21) is closed or opened. The first micro switch (21) is used to mark the position of the slide plate (20).

6. The electric operating mechanism according to claim 1, characterized in that: The turntable (14) is provided with a clearance groove (1401). The housing (2) is also provided with a second micro switch (22) and a third micro switch (23). The second micro switch (22) and the third micro switch (23) are located on the rotation path of the clearance groove (1401). When the second micro switch (22) / the third micro switch (23) is in the clearance groove (1401), the second micro switch (22) / the third micro switch (23) is open. Otherwise, the turntable (14) causes the second micro switch (22) / the third micro switch (23) to close. The second micro switch (22) / the third micro switch (23) is used to mark the opening and closing of the circuit breaker.

7. The electric operating mechanism according to claim 1, characterized in that: The gear set mechanism includes a motor (9), a third gear (10) and a fourth gear (11). The third gear (10) is driven by the motor (9), and the fourth gear (11) meshes with the third gear (10). The fourth gear (11) is connected to the first gear (4) and rotates synchronously.

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