Electric operating mechanism of high-stability reclosing circuit breaker

Abstract

The utility model discloses an electric operating mechanism of a high-stability reclosing circuit breaker, which comprises a motor and a base plate arranged on one side of the motor, the motor is provided with a limiting gasket, and a rotating shaft of the motor is sequentially sleeved with a large gear and a ratchet wheel. The back face of one-way teeth of the ratchet wheel is provided with an inclined guide face, a rotating shaft of the motor is provided with an abutting groove, the ratchet wheel is provided with a pressure bearing groove corresponding to the abutting groove, the large gear abuts against the limiting gasket, the base plate is provided with a rotatable shaft rod, and the shaft rod is provided with a small gear and meshed with the large gear. Through the ratchet wheel, the pawl and the cooperation of the pressure bearing groove and the abutting groove, the large gear can be driven to rotate through the motor, the small gear can also be driven to drive the large gear to rotate through the manual rotating shaft rod, through the design, the number of parts is reduced, the assembling efficiency is improved, and the product has the advantages of reducing the failure rate, reducing the manufacturing cost and being high in stability.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, and in particular to an electric operating mechanism for a high-stability reclosing circuit breaker. Background Technology

[0002] Reclosing circuit breakers are widely used in power transmission and distribution circuits to control and protect the circuits. Reclosing circuit breakers have two modes: electric operation and manual operation. Electric operation can replace manual operation, eliminating the need for operators to be on-site, and enabling the reclosing circuit breaker to open and close under remote signal control.

[0003] There are two types of electric operating mechanisms: motor-operated and electromagnet-operated. Electric operating mechanisms offer the advantage of flexible speed adjustment and are currently the most widely used type of electric operating mechanism for low-voltage circuit breakers. However, when the electric operating mechanism fails, the motor-operated mechanism still requires a manual operating mechanism to automatically open and close the low-voltage circuit breaker. Therefore, the drive mechanism needs to simultaneously meet the functions of both electric and manual operation. Existing electric operating mechanisms require many components, and the interaction of these components can easily increase the failure rate of the electric operating mechanism. Furthermore, they are difficult to assemble, leading to increased manufacturing costs. Therefore, the applicant has developed a beneficial design and found a solution to the above problems. The technical solution described below arose from this background. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the electric operating mechanism design of traditional reclosing circuit breakers and to provide a product with reduced failure rate, reduced manufacturing cost, and high stability.

[0005] To solve the above problems, the present invention adopts the following technical solution.

[0006] An electric operating mechanism for a high-stability reclosing circuit breaker includes a motor and a pad disposed on one side of the motor. The motor is equipped with a limiting washer. A large gear and a ratchet are sequentially mounted on the motor shaft. The back of the one-way teeth of the ratchet is provided with an inclined guide surface. The motor shaft is provided with an abutment groove. The ratchet is provided with a pressure-bearing groove corresponding to the abutment groove. The large gear abuts against the limiting washer. The pad is provided with a rotatable shaft. The shaft is provided with a small gear that meshes with the large gear. The large gear is provided with a baffle. The baffle is provided with retractable pawls on both sides. The pawls are provided with inclined surfaces that abut against the guide surfaces.

[0007] Preferably, the baffle has a first through hole for accommodating a ratchet, and the baffle has second through holes for accommodating pawls on both sides. The second through holes have limiting holes on both sides. The second through hole has a notch and communicates with the first through hole. The second through hole also has a first groove located on the opposite side of the notch.

[0008] Preferably, the pawl is provided with limiting blocks on both sides and slidably disposed in the limiting hole. The pawl is provided with a second groove corresponding to the first groove. A spring is provided between the first groove and the second groove so that the inclined surface passes through the notch and abuts against the guide surface.

[0009] Preferably, the limiting gasket has a first boss, a second boss inside the first boss, and a third through hole in the second boss.

[0010] Preferably, the large gear has several limiting posts evenly distributed around the dot as the axis and close to the inner wall of the third through hole. A wear-resistant gasket is provided between the large gear and the limiting gasket and close to the inner wall of the first boss. The wear-resistant gasket has a fourth through hole and abuts against the outer wall of the first boss.

[0011] Preferably, the pad is provided with a bracket, the shaft passes through the bracket, the shaft is provided with a rotating part, and the rotating part is provided with a hexagonal groove.

[0012] Preferably, the baffle is provided with a crank, the crank is provided with a rotatable push rod, and the crank is provided with a plurality of fastening screws to connect and fix the crank to the baffle and the large gear.

[0013] Beneficial effects:

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] (1) In this utility model, when the motor is running, the rotating shaft drives the ratchet to rotate. The ratchet and the pawl abut against each other and drive the large gear, crank, and small gear to rotate together. The push rod drives the handle of the reclosing circuit breaker to perform the closing operation. Similarly, the rotating shaft can be rotated in the opposite direction to perform the opening operation. When the shaft is manually rotated, the small gear drives the large gear to rotate. The push rod drives the handle of the reclosing circuit breaker to perform the closing operation. Similarly, the shaft can be rotated in the opposite direction to perform the opening operation. Through the above optimization of the structure and reasonable design, the number of required parts and the failure rate are reduced. Due to the reduction of parts, the assembly efficiency is improved, and the product has the advantages of reducing the failure rate and reducing the manufacturing cost.

[0016] (2) In this utility model, when the large gear is subjected to pulling force during rotation, the third through hole serves as a limiting post and the first boss serves as a wear-resistant pad, providing strong support to limit the large gear from shifting too far and prevent the motor shaft from being subjected to large radial pressure. This effectively improves the service life of the motor and the large gear, prevents the large gear from swaying due to external force, and gives the product the advantage of high stability. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the electric operating mechanism of a high-stability reclosing circuit breaker according to the present invention.

[0018] Figure 2 This is a side cross-sectional view of the electric operating mechanism of a high-stability reclosing circuit breaker according to the present invention.

[0019] Figure 3 This is a top view of the electric operating mechanism of a high-stability reclosing circuit breaker according to the present invention.

[0020] Figure 4 This is an exploded view of the electric operating mechanism of a high-stability reclosing circuit breaker according to the present invention.

[0021] Figure 5 This is an exploded view of the electric operating mechanism of a high-stability reclosing circuit breaker according to this utility model.

[0022] The correspondence between the labels and component names in the attached figures is as follows:

[0023] Reference numerals in the attached diagram: 1. Motor; 2. Pad; 3. Limiting washer; 4. Large gear; 5. Ratchet; 6. Baffle; 7. Crank; 8. Pad; 9. Wear-resistant washer;

[0024] 11. Abutment groove;

[0025] 21. Shaft; 22. Pinion; 23. Bracket;

[0026] 211. Rotating part; 212. Hexagonal groove;

[0027] 31. First boss; 32. Third through hole; 33. Second boss;

[0028] 41. Limiting post;

[0029] 51. One-way tooth; 52. Guide surface; 53. Pressure-bearing groove;

[0030] 61. First through hole; 62. Second through hole; 63. Limiting hole; 64. Notch; 65. First groove;

[0031] 71. Push rod; 72. Fastening screw;

[0032] 81. Limiting block; 82. Second groove; 83. Spring; 84. Inclined surface;

[0033] 91. Fourth through hole. Detailed Implementation

[0034] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0035] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] In this embodiment of the utility model, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0037] Reference example Figures 1 to 5 An electric operating mechanism for a high-stability reclosing circuit breaker includes a motor 1 and a pad 2 disposed on one side of the motor 1. The motor 1 is provided with a limiting pad 3. The rotating shaft of the motor 1 is sequentially fitted with a large gear 4 and a ratchet 5. The back of the one-way teeth 51 of the ratchet 5 is provided with an inclined guide surface 52. The rotating shaft of the motor 1 is provided with an abutment groove 11. The ratchet 5 is provided with a pressure-bearing groove 53 corresponding to the abutment groove 11. The large gear 4 abuts against the limiting pad 3. The pad 2 is provided with a rotatable shaft 21. The shaft 21 is provided with a small gear 22 that meshes with the large gear 4. The large gear 4 is provided with a baffle 6. The baffle 6 is provided with retractable pawls 8 on both sides. The pawls 8 are provided with an inclined surface 84 that abuts against the guide surface 52. The torque is transmitted to the pressure-bearing groove 53 through the abutment groove 11, thereby reducing the loss of transmission efficiency.

[0038] It is worth mentioning that the baffle 6 is provided with a first through hole 61 to accommodate the ratchet 5, and the baffle 6 is provided with a second through hole 62 to accommodate the pawl 8 on both sides. The second through hole 62 is provided with a limiting hole 63 on both sides. The second through hole 62 is provided with a notch 64 and communicates with the first through hole 61. The second through hole 62 is also provided with a first groove 65 and is located on the opposite side of the notch 64. The limiting hole 63 limits the distance of the pawl 8 extending and retracting. The notch 64 allows the pawl 8 to extend into the second through hole 62. The first groove 65 prevents the spring 83 from disengaging and facilitates the positioning of the spring 83 during assembly.

[0039] It is worth mentioning that the pawl 8 is provided with limiting blocks 81 on both sides and is slidably disposed in the limiting hole 63. The pawl 8 is provided with a second groove 82 corresponding to the first groove 65. A spring 83 is provided between the first groove 65 and the second groove 82, so that the inclined surface 84 passes through the notch 64 and abuts against the guide surface 52. The limiting blocks 81 are used in conjunction with the limiting hole 63, and the spring 83 makes the pawl 8 fit tightly against the guide surface 52.

[0040] It is worth mentioning that the limiting gasket 3 is provided with a first protrusion 31, and a second protrusion 33 is provided inside the first protrusion 31. The second protrusion 33 is provided with a third through hole 32. The second protrusion 33 is used in conjunction with the fourth through hole 91, and the third through hole 32 is used in conjunction with the limiting post 41.

[0041] It is worth mentioning that the large gear 4 is provided with several limiting posts 41 evenly distributed around the center point and close to the inner wall of the third through hole 32. A wear-resistant pad 9 is provided between the large gear 4 and the limiting pad 3 and close to the inner wall of the first boss 31. The wear-resistant pad 9 is provided with a fourth through hole 91 and abuts against the outer wall of the second boss 33. When the large gear 4 is subjected to a pulling force during rotation, the third through hole 32 provides strong support for the limiting posts 41 and the first boss 31 provides strong support for the wear-resistant pad 9, limiting the large gear 4 from making a large offset distance and preventing the shaft of the motor 1 from being subjected to a large radial pressure, thereby effectively improving the service life of the motor 1 and the large gear 4 and preventing the large gear 4 from swinging due to external forces.

[0042] By using the limiting post 41 in conjunction with the third through hole 32, the large gear 4, the limiting pad 3, and the motor 1 shaft are aligned on the same axis, preventing vibration and sway caused by external forces during rotation. The wear-resistant pad 9 further prevents the above-mentioned effects, thereby increasing the service life of the motor 1 and the drive mechanism.

[0043] It is worth mentioning that the pad 2 is provided with a bracket 23, the shaft 21 passes through the bracket 23, the shaft 21 is provided with a rotating part 211, the rotating part 211 is provided with a hexagonal groove 212, the bracket 23 provides support for the shaft 21, and the tool is inserted into the hexagonal groove 212, at which time the shaft 21 can be rotated;

[0044] It is worth mentioning that the baffle 6 is equipped with a crank 7, the crank 7 is equipped with a rotatable push rod 71, and the crank 7 is equipped with several fastening screws 72, so that the crank 7 is connected and fixed to the baffle 6 and the large gear 4, and the push rod 71 is connected to the handle of the reclosing circuit breaker.

[0045] The working principle of this utility model is described as follows:

[0046] Example 1

[0047] As attached Figure 3 As shown, when the shaft of motor 1 rotates clockwise, it drives ratchet 5 and large gear 4 to rotate together. Ratchet 5 abuts against pawl 8, which improves the transmission efficiency and torque of the shaft of motor 1, thereby driving crank 7 to rotate and driving push rod 71 to close the handle of the reclosing circuit breaker.

[0048] When the motor 1 rotates in the opposite direction, it drives the large gear 4 to rotate. The ratchet 5 will not apply any torque to the pawl 8. At this time, the crank 7 rotates in the opposite direction, driving the push rod 71 to open the handle of the reclosing circuit breaker.

[0049] Example 2

[0050] As attached Figure 3 As shown, when the shaft 21 is manually rotated clockwise, the small gear 22 drives the large gear 4 to rotate, and drives the shaft and ratchet 5 to rotate together. The ratchet 5 abuts against the pawl 8, which improves the transmission efficiency and torque of the shaft 21, thereby driving the crank 7 to rotate and driving the push rod 71 to close the handle of the reclosing circuit breaker.

[0051] When shaft 21 moves in the opposite direction, pinion 22 drives gear 4 to rotate. At this time, ratchet 5 will not apply any torque to pawl 8, and crank 7 rotates in the opposite direction, driving push rod 71 to open the handle of the reclosing circuit breaker.

[0052] The above design scheme can enable the product to achieve the advantages of reduced failure rate, reduced manufacturing cost, and high stability.

[0053] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present utility model. It should not be construed that the specific implementation of the present utility model is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present utility model, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted by the present utility model.

Claims

1. An electric operating mechanism for a high-stability reclosing circuit breaker, comprising a motor (1) and a pad (2) disposed on one side of the motor (1), characterized in that: The motor (1) is provided with a limiting pad (3). The rotating shaft of the motor (1) is sequentially fitted with a large gear (4) and a ratchet (5). The back of the one-way tooth (51) of the ratchet (5) is provided with an inclined guide surface (52). The rotating shaft of the motor (1) is provided with an abutment groove (11). The ratchet (5) is provided with a pressure groove (53) corresponding to the abutment groove (11). The large gear (4) abuts against the limiting pad (3). The pad (2) is provided with a rotatable shaft (21). The shaft (21) is provided with a small gear (22) and meshes with the large gear (4). The large gear (4) is provided with a baffle (6). The baffle (6) is provided with retractable pawls (8) on both sides. The pawls (8) are provided with an inclined surface (84) and abut against the guide surface (52).

2. The electric operating mechanism of the high-stability reclosing circuit breaker according to claim 1, characterized in that: The baffle (6) is provided with a first through hole (61) for accommodating a ratchet (5), and the baffle (6) is provided with a second through hole (62) for accommodating a pawl (8) on both sides. The second through hole (62) is provided with a limiting hole (63) on both sides. The second through hole (62) is provided with a notch (64) and communicates with the first through hole (61). The second through hole (62) is also provided with a first groove (65) and is located on the opposite side of the notch (64).

3. The electric operating mechanism of the high-stability reclosing circuit breaker according to claim 2, characterized in that: The pawl (8) has limiting blocks (81) on both sides and is slidably disposed in the limiting hole (63). The pawl (8) has a second groove (82) corresponding to the first groove (65). A spring (83) is provided between the first groove (65) and the second groove (82) so that the inclined surface (84) passes through the notch (64) and abuts against the guide surface (52).

4. The electric operating mechanism of the high-stability reclosing circuit breaker according to claim 1, characterized in that: The limiting pad (3) is provided with a first boss (31), the first boss (31) is provided with a third through hole (32), the first boss (31) is provided with a second boss (33), and the second boss (33) is provided with a third through hole (32).

5. The electric operating mechanism of the high-stability reclosing circuit breaker according to claim 4, characterized in that: The large gear (4) has several limiting posts (41) evenly distributed around the dot as the axis and close to the inner wall of the third through hole (32). A wear-resistant pad (9) is provided between the large gear (4) and the limiting pad (3) and is close to the inner wall of the first boss (31). The wear-resistant pad (9) has a fourth through hole (91) and abuts against the outer wall of the first boss (31).

6. The electric operating mechanism of the high-stability reclosing circuit breaker according to claim 5, characterized in that: The pad (2) is provided with a bracket (23), the shaft (21) passes through the bracket (23), the shaft (21) is provided with a rotating part (211), and the rotating part (211) is provided with a hexagonal groove (212).

7. The electric operating mechanism of the high-stability reclosing circuit breaker according to any one of claims 2 to 6, characterized in that: The baffle (6) is provided with a crank (7), the crank (7) is provided with a rotatable push rod (71), and the crank (7) is provided with a number of fastening screws (72) to connect and fix the crank (7) to the baffle (6) and the large gear (4).

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