CN216648198U

CN216648198U - Plastic case circuit breaker and electric operating mechanism thereof

Info

Publication number: CN216648198U
Application number: CN202121905563.7U
Authority: CN
Inventors: 曹兵兵; 宋城爱; 邸云飞
Original assignee: Foretech Elec App Jiangsu Corp ltd
Current assignee: Foretech Elec App Jiangsu Corp ltd
Priority date: 2021-08-13
Filing date: 2021-08-13
Publication date: 2022-05-31
Anticipated expiration: 2031-08-13

Abstract

The utility model discloses an electric operating mechanism of a molded case circuit breaker, which comprises a rack, a cam slider assembly arranged below the rack and an electric gear assembly arranged on the rack, wherein the cam slider assembly comprises a cam slider and a cam slider; an operating rod is also rotatably arranged on the rack, a driven gear is arranged at the position, above the rack, of the operating rod, and a cam is arranged at the position, below the rack, of the operating rod; an output shaft of the motor rotates and drives the driven gear and the operating rod to rotate through the gear, the operating rod rotates to drive the cam to rotate, the cam rotates and drives the driving block to rotate, and the driving block rotates and drives the sliding block to slide on the rack; or, the operating rod is driven to rotate manually, the operating rod rotates and drives the cam to rotate, the cam rotates and drives the driving block to rotate, and the driving block rotates and enables the sliding block to slide on the rack. The electric operating mechanism of the molded case circuit breaker has simple structure and reliable performance; because the motor is laid down, small in size, and then can effectually reduce the whole height behind the circuit breaker installation electric operator.

Description

Plastic case circuit breaker and electric operating mechanism thereof

Technical Field

The utility model relates to the technical field of circuit breakers, in particular to a molded case circuit breaker and an electric operating mechanism thereof.

Background

The electric operating mechanism is one of the common accessories of the plastic shell type circuit breaker, and after being matched with the circuit breaker, the electric operating mechanism can electrically close, open and re-buckle the circuit breaker in a long distance to realize the centralized and automatic control of the power transmission and distribution network. With the development of electric power utilities, the electric operating mechanism of the molded case circuit breaker has gradually become the mainstream of the current development, and the design is developed towards miniaturization and intellectualization.

Meanwhile, diversified requirements are provided for the installation environment and the accessory combination mode of the molded case circuit breaker, and the existing molded case circuit breaker electric operating mechanism has the defects of complex structure, large volume, unreliable performance and the like, and cannot meet the requirements of circuit breaker installation and use.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model provides the molded case circuit breaker and the electric operating mechanism thereof, and the electric operating mechanism of the molded case circuit breaker has the advantages of simple structure, reliable performance and high switching-on and switching-off speed.

In order to achieve the purpose, the utility model provides the following technical scheme: the electric operating mechanism of the molded case circuit breaker comprises a rack, a cam slider assembly arranged below the rack and an electric gear assembly arranged on the rack; the rack is also rotatably provided with an operating rod, a driven gear is arranged at the position, above the rack, of the operating rod, and a cam is arranged at the position, below the rack, of the operating rod;

the cam sliding block assembly comprises a sliding block and a cam arranged above the sliding block, and the sliding block is arranged on the rack in a sliding mode; the sliding block is provided with a strip-shaped through hole or a strip-shaped groove, the cam is provided with a driving block, and the driving block extends into the strip-shaped through hole or the strip-shaped groove; the cam rotates and drives the driving block to rotate, and the driving block rotates and drives the sliding block to slide on the rack;

the electric gear assembly comprises a motor and a plurality of meshed first gears; an output shaft of the motor is arranged along the horizontal direction and is in meshed transmission connection with the driven gear through the first gear;

an output shaft of the motor rotates and drives the driven gear and the operating rod to rotate through the gear, the operating rod rotates to drive the cam to rotate, the cam rotates and drives the driving block to rotate, and the driving block rotates and drives the sliding block to slide on the rack; or, the operating rod is driven to rotate manually, the operating rod rotates and drives the cam to rotate, the cam rotates and drives the driving block to rotate, and the driving block rotates and enables the sliding block to slide on the rack.

When the circuit breaker is electrically operated, the motor rotates, an output shaft of the motor rotates and drives the driven gear and the operating rod to rotate through the gear, the operating rod rotates and drives the cam to rotate, the cam rotates and drives the driving block to rotate, and the driving block rotates and drives the sliding block to slide on the rack, so that the circuit breaker is buckled, opened and closed again;

when the circuit breaker is manually operated, a tool is used for rotating the operating rod, the operating rod rotates and drives the cam to rotate, the cam rotates and drives the driving block to rotate, and the driving block rotates and drives the sliding block to slide on the rack, so that the circuit breaker is buckled, opened and closed again;

the electric operating mechanism of the molded case circuit breaker has simple structure and reliable performance; because the motor is laid down, small in size, and then can effectually reduce the whole height behind the circuit breaker installation electric operator.

Preferably, the motor is mounted below the rack, a second gear is rotatably arranged on the rack, and the upper part of the second gear is meshed with the first gear; the lower part of the second gear is meshed with an output shaft of the motor.

Preferably, a worm is mounted on an output shaft of the motor, and the worm is meshed with the second gear; or a driving bevel gear is mounted on an output shaft of the motor, a driven bevel gear which rotates coaxially with the second gear is fixed at the lower end of the second gear, and the driving bevel gear is meshed with the driven bevel gear.

Preferably, the first gear comprises a first gear A and a first gear B which rotates coaxially with the first gear A, and the diameter of the first gear A is larger than that of the first gear B; the plurality of first gears are sequentially meshed and connected to form a meshing path, the diameter of the first gear A is directly and gradually increased along the direction from the second gear to the driven gear, and the diameter of the first gear B meshed with the driven gear is smaller than that of the driven gear.

Preferably, a transverse plate is fixed on the sliding block, and the transverse plate is provided with the strip-shaped through hole or the strip-shaped groove.

Preferably, the driving block is a bidirectional bearing, and the bidirectional bearing is fixedly or rotatably arranged on the cam through a shaft; or the driving block is a rotating shaft which is rotatably arranged on the cam.

Preferably, an annular groove is formed in the center of the driven gear, a one-way bearing is arranged in the annular groove, and the one-way bearing is sleeved on the operating rod.

Preferably, a protruding block is integrally formed in the center of the driven gear, and the protruding block is provided with the annular groove.

Preferably, the upper end of the operating rod is provided with a straight groove; the motor is a direct current motor; the rack comprises a first bracket and a second bracket mounted at the upper end of the first bracket, a cavity is formed between the first bracket and the second bracket, the electric gear assembly is arranged in the cavity, and the cam slider assembly is arranged below the first bracket.

The molded case circuit breaker comprises the electric operating mechanism of the molded case circuit breaker.

In conclusion, the utility model has the following beneficial effects:

1. the electric operating mechanism of the molded case circuit breaker has the advantages of simple structure, reliable performance and high opening and closing speed;

2. the electrode on the molded case circuit breaker is arranged horizontally, so that the size is small, and the overall height of the circuit breaker after the circuit breaker is installed and operated electrically can be effectively reduced;

3. the one-way bearing is sleeved on the operating rod of the molded case circuit breaker, so that when the circuit breaker is manually operated, labor is saved, the abrasion of the gear is reduced, and the service life of the circuit breaker is prolonged.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the cam slider assembly of the present invention assembled with an operating lever;

FIG. 3 is a schematic view of the present invention with the second bracket removed;

FIG. 4 is a cross-sectional view of the present invention;

FIG. 5 is a bottom view of the present invention;

fig. 6 is a schematic structural view of the cam and bidirectional bearing assembly of the present invention.

Reference numerals: 1. a cam slider assembly; 2. a motorized gear assembly; 3. an operating lever; 4. a driven gear; 5. a cam; 6. a slider; 7. a slide bar; 8. a strip-shaped through hole; 9. a transverse plate; 10. a motor; 11. a first gear; 12. a second gear; 13. a drive bevel gear; 14. a driven bevel gear; 15. a bidirectional bearing; 16. a one-way bearing; 17. a bump; 18. a straight slot; 19. a first bracket; 20. a second bracket; 21. a chamber.

Detailed Description

The utility model is further illustrated with reference to the accompanying drawings.

The embodiment discloses a molded case circuit breaker and an electric operating mechanism thereof, and as shown in fig. 1-6, the molded case circuit breaker comprises a rack, a cam slider assembly 1 arranged below the rack, and an electric gear assembly 2 arranged on the rack; an operating rod 3 is also rotatably arranged on the rack, a driven gear 4 is arranged at the position, above the rack, of the operating rod 3, and a cam 5 is arranged at the position, below the rack, of the operating rod 3; the cam slide block assembly 1 comprises a slide block 6 and a cam 5 arranged above the slide block 6, wherein the slide block 6 is arranged on a rack in a sliding manner, specifically, two slide bars 7 are symmetrically arranged on the rack, the slide block 6 is sleeved on the two slide bars 7, the slide bars 7 can slide on the slide bars 7, a strip-shaped through hole 8 or a strip-shaped groove is arranged on the slide block 6, specifically, a transverse plate 9 is fixed on the slide block 6, the transverse plate 9 is provided with the strip-shaped through hole 8 or the strip-shaped groove, a driving block is arranged on the cam 5, and the driving block extends into the strip-shaped through hole 8 or the strip-shaped groove; the cam 5 rotates and drives the driving block to rotate, and the driving block rotates and drives the sliding block 6 to slide on the rack; the motorized gear assembly 2 comprises a motor 10, and a plurality of first gears 11 engaged with each other; an output shaft of the motor 10 is arranged along the horizontal direction, and the output shaft of the motor 10 is in meshing transmission connection with the driven gear 4 through a first gear 11; an output shaft of the motor 10 rotates and drives the driven gear 4 and the operating rod 3 to rotate through gears, the operating rod 3 rotates to drive the cam 5 to rotate, the cam 5 rotates and drives the driving block to rotate, and the driving block rotates and drives the sliding block 6 to slide on the rack; or, the operating rod 3 is driven to rotate manually, the operating rod 3 rotates and drives the cam 5 to rotate, the cam 5 rotates and drives the driving block to rotate, and the driving block rotates and drives the sliding block 6 to slide on the rack.

When the circuit breaker is electrically operated, the motor 10 rotates, an output shaft of the motor 10 rotates and drives the driven gear 4 and the operating rod 3 to rotate through the gears, the operating rod 3 rotates and drives the cam 5 to rotate, the cam 5 rotates and drives the driving block to rotate, the driving block rotates and enables the sliding block 6 to slide on the rack, the sliding block 6 is connected with a handle on the circuit breaker, and the sliding block 6 slides and drives the handle to move, so that the circuit breaker is buckled, opened and closed again; when the circuit breaker is manually operated, a tool is used for rotating the operating rod 3, the operating rod 3 rotates and drives the cam 5 to rotate, the cam 5 rotates and drives the driving block to rotate, the driving block rotates and enables the sliding block 6 to slide on the rack, the sliding block 6 is connected with a handle on the circuit breaker, and the sliding block 6 slides and drives the handle to move, so that the circuit breaker is buckled, opened and closed again;

the electric operating mechanism of the molded case circuit breaker has simple structure and reliable performance; because the motor 10 is laid down, the size is small, and the overall height of the breaker after the breaker is installed and the electric operation can be effectively reduced.

In some embodiments, the motor 10 is installed below a frame, and a second gear 12 is rotatably installed on the frame, and an upper portion of the second gear 12 is engaged with the first gear 11; the lower portion of the second gear 12 is engaged with the output shaft of the motor 10. Therefore, the driving assemblies of the electric operating mechanism are all arranged below the rack, and the performance of the electric operating mechanism is more reliable.

In some embodiments, a worm is mounted on the output shaft of the motor 10, and the worm is engaged with the second gear 12; or, a driving bevel gear 13 is mounted on the output shaft of the motor 10, a driven bevel gear 14 rotating coaxially with the second gear 12 is fixed at the lower end of the second gear, and the driving bevel gear 13 is engaged with the driven bevel gear 14. An output shaft of the motor 10 rotates and drives a worm to rotate, and the worm rotates and drives the second gear 12 and the first gear 11 to rotate; alternatively, the output shaft of the motor 10 rotates and drives the drive bevel gear 13 to rotate, and the drive bevel gear 13 rotates and drives the driven bevel gear 14, the second gear 12, and the first gear 11 to rotate.

The first gear 11 is rotatably arranged on the rack and comprises a first gear 11A and a first gear 11B which coaxially rotates with the first gear 11A, and the diameter of the first gear 11A is larger than that of the first gear 11B; the plurality of first gears 11 are sequentially engaged and connected to form an engagement path, the diameter of the first gear 11A is gradually increased in a direction from the second gear 12 to the driven gear 4 along the engagement path, and the diameter of the first gear 11B engaged with the driven gear 4 is smaller than that of the driven gear 4. Therefore, the opening and closing speed of the electric operating mechanism is high.

In some embodiments, the drive block is a bidirectional bearing 15, the bidirectional bearing 15 being fixed or rotatably disposed on the cam 5 by a shaft; alternatively, the driving block is a rotating shaft rotatably provided on the cam 5. So, convert into rolling friction by sliding friction between drive block and bar through-hole 8 or the bar recess, be favorable to the drive block to impel slider 6 to slide.

Preferably, an annular groove is formed in the center of the driven gear 4, a one-way bearing 16 is arranged in the annular groove, and the one-way bearing 16 is sleeved on the operating rod 3. In one embodiment, a protrusion 17 is integrally formed at the center of the driven gear 4, and an annular groove is formed on the protrusion 17.

When the circuit breaker is electrically operated, the motor 10 rotates clockwise, the output shaft of the motor 10 rotates and drives the driven gear 4 to rotate clockwise through the gear, the corresponding one-way bearing 16 and the operating rod 3 are driven to rotate clockwise, the operating rod 3 is linked with the cam 5 and the driving block to rotate clockwise, and the cam 5 and the driving block are linked with the sliding block 6 to move horizontally, so that the circuit breaker is buckled, opened and closed again.

During manual operation circuit breaker, use instrument anticlockwise rotation action bars 3, make action bars 3 and electronic gear assembly 2 separation under one-way bearing 16's effect this moment, electronic gear assembly 2 can not rotate along with the rotation of action bars 3 promptly, and action bars 3 directly links cam 5 and drive block, makes slider 6 carry out horizontal motion to realize detaining again, separating brake, the combined floodgate of circuit breaker. When the circuit breaker is manually operated, labor is saved, abrasion of gears is reduced, and the service life of the circuit breaker is prolonged.

Furthermore, the upper end of the operating rod 3 is provided with a straight groove 18; meanwhile, the motor 10 is a direct current motor 10; wherein, the frame includes first support 19, and install the second support 20 in the upper end of first support 19, forms cavity 21 between first support 19 and the second support 20, and electronic gear assembly 2 arranges in cavity 21, and cam 5 slider 6 subassembly 1 arranges in the below of first support 19. In this way, the arrangement of the motorized gear assembly 2 inside the chamber 21 formed by the first bracket 19 and the second bracket 20, makes it possible to protect the gears.

In the present invention, it should be understood that the terms "upper", "lower", and the like indicate orientations or positional relationships based on those shown in the drawings, which are merely for convenience of describing the present invention and simplifying the description, and thus, should not be construed as limiting the present invention.

The directions specified in the present embodiment are merely for convenience of describing the positional relationship between the respective members and the relationship of mutual cooperation. The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the utility model may occur to those skilled in the art without departing from the principle of the utility model, and are considered to be within the scope of the utility model.

Claims

1. Moulded case circuit breaker's electric operating mechanism, characterized by: comprises a frame, a cam slider component (1) arranged below the frame and an electric gear component (2) arranged on the frame; an operating rod (3) is further rotatably arranged on the rack, a driven gear (4) is mounted at a position, above the rack, of the operating rod (3), and a cam (5) is mounted at a position, below the rack, of the operating rod (3);

the cam slider assembly (1) comprises a slider (6) and a cam (5) arranged above the slider (6), and the slider (6) is arranged on a rack in a sliding manner; a strip-shaped through hole (8) or a strip-shaped groove is formed in the sliding block (6), a driving block is arranged on the cam (5), and the driving block extends into the strip-shaped through hole (8) or the strip-shaped groove;

the motorized gear assembly (2) comprises a motor (10) and a plurality of meshed first gears (11); an output shaft of the motor (10) is arranged along the horizontal direction, and the output shaft of the motor (10) is in meshed transmission connection with the driven gear (4) through the first gear (11);

an output shaft of the motor (10) rotates and drives the driven gear (4) and the operating rod (3) to rotate through the gears, the operating rod (3) rotates to drive the cam (5) to rotate, the cam (5) rotates to drive the driving block to rotate, and the driving block rotates to drive the sliding block (6) to slide on the rack; or the operating rod (3) is driven to rotate manually, the operating rod (3) rotates and drives the cam (5) to rotate, the cam (5) rotates and drives the driving block to rotate, and the driving block rotates and drives the sliding block (6) to slide on the rack.

2. The electric operating mechanism of the molded case circuit breaker according to claim 1, wherein: the motor (10) is arranged below the rack, a second gear (12) is rotatably arranged on the rack, and the upper part of the second gear (12) is meshed with the first gear (11); the lower part of the second gear (12) is meshed with the output shaft of the motor (10).

3. The electric operating mechanism of the molded case circuit breaker according to claim 2, wherein: a worm is mounted on an output shaft of the motor (10), and the worm is meshed with the second gear (12); or a driving bevel gear (13) is mounted on an output shaft of the motor (10), a driven bevel gear (14) which rotates coaxially with the second gear is fixed at the lower end of the second gear (12), and the driving bevel gear (13) is meshed with the driven bevel gear (14).

4. The electric operating mechanism of the molded case circuit breaker according to claim 1, wherein: the first gear (11) comprises a first gear A and a first gear B which coaxially rotates with the first gear A, and the diameter of the first gear A is larger than that of the first gear B; the plurality of first gears (11) are sequentially meshed and connected to form a meshing path, the diameter of the first gear A is gradually increased along the direction from the second gear (12) to the driven gear (4), and the diameter of the first gear B meshed with the driven gear (4) is smaller than that of the driven gear (4).

5. The electric operating mechanism of the molded case circuit breaker according to claim 1, wherein: and a transverse plate (9) is fixed on the sliding block (6), and the transverse plate (9) is provided with the strip-shaped through hole (8) or the strip-shaped groove.

6. The electric operating mechanism of the molded case circuit breaker according to claim 1, wherein: the driving block is a bidirectional bearing (15), and the bidirectional bearing (15) is fixedly or rotatably arranged on the cam (5) through a shaft; or the driving block is a rotating shaft which is rotatably arranged on the cam (5).

7. The electric operating mechanism of the molded case circuit breaker according to claim 1, wherein: an annular groove is formed in the center of the driven gear (4), a one-way bearing (16) is arranged in the annular groove, and the one-way bearing (16) is sleeved on the operating rod (3).

8. The electric operating mechanism of the molded case circuit breaker according to claim 7, wherein: a convex block (17) is integrally formed in the center of the driven gear (4), and the convex block (17) is provided with the annular groove.

9. The electric operating mechanism of the molded case circuit breaker according to claim 1, wherein: the upper end of the operating rod (3) is provided with a straight groove (18); the motor (10) is a direct current motor (10); the frame comprises a first bracket (19) and a second bracket (20) installed at the upper end of the first bracket (19), a cavity (21) is formed between the first bracket (19) and the second bracket (20), the electric gear assembly (2) is arranged in the cavity (21), and the cam slider assembly (1) is arranged below the first bracket (19).

10. Moulded case circuit breaker, characterized by: an electric operating mechanism including the molded case circuit breaker according to any one of claims 1 to 9.