Electric operator for molded case circuit breaker

Abstract

The utility model relates to an electric operator for a molded case circuit breaker, which comprises a housing, a straight gear set and a bevel gear set are arranged in the housing, and connecting rods are arranged on output gears of the bevel gear set and the straight gear set; the direct-current motor is arranged at the upper end of the housing through a motor bracket, is inserted from the upper end of the housing, is connected with the housing and is in transmission connection with the input end of the straight gear set through the bevel gear set; the transmission arm is vertically and rotatably arranged, a long groove is formed in the lower end of the transmission arm, the lower end of the transmission arm is inserted into the housing and matched with the connecting rod, and a push plate matched with the molded case circuit breaker is arranged at the upper end of the transmission arm; and the side cover is fixedly arranged and shields the side cavity opening of the housing. And the overall operation power consumption of the electric operator is lower by utilizing the high stability of the direct current motor. The direct current motor drives the connecting rod to rotate through the bevel gear set and the straight gear set, the overall structure is stable and reliable, assembling is convenient, and quick-wear parts are convenient to disassemble, assemble and maintain.

Description

Technical Field

[0001] This utility model relates to the field of circuit breakers, specifically to an electrical control for a molded case circuit breaker. Background Technology

[0002] Molded case circuit breakers (MCCBs) are switching devices used to protect circuits and are widely used in residential, commercial, and industrial applications. MCCBs are waterproof, dustproof, and shockproof, and have a longer service life.

[0003] The electric operating mechanism, or simply electric operator, is used to control the molded case circuit breaker for energy storage operations.

[0004] For existing electric operating mechanisms, see prior patents CN206961780U - Electric Operating Mechanism and CN104124113A - Electric Operating Mechanism for a Miniature Circuit Breaker.

[0005] Current electric operating mechanisms mainly use a motor to drive the worm gear assembly inside the housing, which in turn drives the transmission plate to reciprocate. In the past, the housing of such electric operating mechanisms was installed separately, the internal transmission mechanism was complex, the protection level was not high, and the assembly was inconvenient. Utility Model Content

[0006] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide an electric control for molded case circuit breakers, which solves the problems of complex internal transmission structure and inconvenient assembly of previous electric control devices.

[0007] The technical solution adopted by this utility model to solve its technical problem is:

[0008] Provides an electrical control for a molded case circuit breaker, including...

[0009] A housing, wherein a spur gear set and a bevel gear set are provided inside the housing, and a connecting rod is provided on the output gear of the bevel gear set and the spur gear set;

[0010] A DC motor is mounted on the upper end of the housing via a motor bracket. The DC motor is inserted into and connected to the upper end of the housing and is driven by the input end of a bevel gear set and a spur gear set.

[0011] The transmission arm is designed to rotate vertically. The lower end of the transmission arm has a long groove. The lower end of the transmission arm is inserted into the cover and cooperates with the connecting rod. The upper end of the transmission arm is provided with a push plate for cooperating with the molded case circuit breaker.

[0012] The side cover is fixedly installed and blocks the side cavity opening of the cover.

[0013] Furthermore, the bevel gear set includes

[0014] Bevel gear, be arranged on the rotating shaft of the direct current motor, the bevel gear is vertically arranged and rotates in the horizontal direction;

[0015] Double bevel gear, the double bevel gear is transversely arranged in the shell through the mounting shaft, the double bevel gear includes a straight tooth part and a bevel gear part, the bevel gear part is engaged with the bevel gear, and the straight tooth part is connected with the spur gear set.

[0016] Further, the spur gear set includes

[0017] First double spur gear, second double spur gear and output gear, the output gear is a spur gear;

[0018] The large spur gear of the first double spur gear is connected with the bevel gear set, the small spur gear of the first double spur gear is engaged with the large spur gear of the second double spur gear, and the small spur gear of the second double spur gear is engaged with the output gear.

[0019] Further, the shell is provided with an inner chamber and an outer chamber, and a stepped surface is formed between the inner chamber and the outer chamber;

[0020] A partition plate is arranged in the outer chamber, and a plurality of connecting screws pass through the partition plate and are connected with the stepped surface to fix the partition plate in the outer chamber;

[0021] The bevel gear set and the first double spur gear are located in the inner chamber;

[0022] The large spur gear of the second double spur gear is located in the inner chamber, and the small diameter gear thereof passes through the partition plate and extends into the outer chamber;

[0023] The output gear is located in the outer chamber.

[0024] Further, a plurality of positioning columns are arranged on the stepped surface, and threaded holes are formed in the positioning columns;

[0025] The connecting screws are connected with the positioning columns after passing through the partition plate, and the partition plate abuts against the positioning columns.

[0026] Further, the shell is integrally injection molded.

[0027] The utility model discloses a beneficial effect is:

[0028] The utility model discloses a plastic shell circuit breaker electric manipulator, utilize the high stability of direct current motor, make the overall operation power consumption of electric manipulator lower.

[0029] The direct current motor drives the connecting rod to rotate through the bevel gear set + spur gear set, the overall structure is stable and reliable, and is convenient to assemble, and the wearing parts are convenient to disassemble, maintain.

[0030] The shell is integrally injection molded, and has higher protection level.

[0031] The electric handle for the molded case circuit breaker has simple and reliable structure, low material cost, and is not easy to be damaged. BRIEF DESCRIPTION OF DRAWINGS

[0032] The utility model is further described below in combination with the drawings.

[0033] Figure 1 It is a schematic diagram of the electric handle for the molded case circuit breaker of the utility model;

[0034] Figure 2 It is a schematic diagram of the electric handle for the molded case circuit breaker (without side cover) of the utility model;

[0035] Figure 3 It is a schematic diagram of the cover (with partition plate);

[0036] Figure 4 It is a schematic diagram of the cover (without partition plate);

[0037] Figure 5 It is a schematic diagram of the straight gear set and the bevel gear set assembled together;

[0038] Figure 6 It is a schematic diagram of the straight gear set;

[0039] Figure 7 It is a schematic diagram of the bevel gear set;

[0040] Figure 8 It is a schematic diagram of the transmission arm;

[0041] Figure 9 It is a schematic diagram of the molded case circuit breaker;

[0042] 1, DC motor, 11, motor support;

[0043] 2, cover, 21, inner chamber, 22, outer chamber, 23, positioning column, 24, side cover;

[0044] 3, partition plate;

[0045] 4, bevel gear set, 41, bevel gear, 42, double bevel gear, 421, straight tooth part, 422, bevel tooth part;

[0046] 5, straight gear set, 51, first double straight gear, 52, second double straight gear, 53, output gear;

[0047] 6, transmission arm, 61, long slot, 62, push plate.

[0048] 7, connecting rod;

[0049] 8, circuit breaker shell, 81, mechanism rotating shaft, 82, ratchet wheel. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical scheme and advantages of the utility model embodiment clearer, the technical scheme of the utility model will be described clearly and completely below in combination with the drawings. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0051] The application provides an electric handle for a molded case circuit breaker, which is described in detail below. It should be noted that the description order of the following embodiments is not limited as the preferred order of the embodiments of the application. In the following embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0052] To solve the technical problem of complex internal transmission structure and inconvenient assembly of the electric handle in the prior art, an embodiment of the application provides an electric handle for a molded case circuit breaker. The following is described in detail.

[0053] As shown in Figures 1 to 8 An electric handle for a molded case circuit breaker includes

[0054] A cover 2 is provided with a spur gear set 5 and a bevel gear set 4 inside. The bevel gear set 4 is provided with a connecting rod 7 on the output gear 53 of the spur gear set 5.

[0055] A DC motor 1 is arranged on the upper end of the cover 2 through a motor support 11. The DC motor 1 is inserted into and connected from the upper end of the cover 2, and is drivingly connected through the input end of the bevel gear set 4 and the spur gear set 5.

[0056] A transmission arm 6 is arranged vertically rotatable. The lower end of the transmission arm 6 is provided with a long slot 61. The lower end of the transmission arm 6 is inserted into the cover 2 and cooperates with the connecting rod 7. The upper end of the transmission arm 6 is provided with a push plate 62 for cooperating with the molded case circuit breaker.

[0057] A side cover 24 is fixedly arranged and shields the side cavity opening of the cover 2.

[0058] In this embodiment, the transmission arm 6 is rotatably arranged on the motor support 11.

[0059] As shown in Figure 8 The transmission arm 6 is a sheet metal part. The push plate 62 is obtained by bending at the upper end. The long slot 61 is formed at the lower end of the sheet metal part.

[0060] As shown in Figure 1 The side cover 24 is fixed on the cover 2 and the motor support 11 by screws.

[0061] The push plate 62 passes through the side cover 24 and is used to cooperate with a ratchet 82 in the circuit breaker.

[0062] Specifically, as an optional embodiment in the embodiment, as shown in Figure 5 and Figure 7 shown, the bevel gear set 4 comprises

[0063] a bevel gear 41 arranged on a rotating shaft of the direct current motor 1, the bevel gear 41 is arranged vertically and rotates in the horizontal direction;

[0064] a double bevel gear 42 arranged transversely in the housing 2 through a mounting shaft, the double bevel gear 42 comprises a spur gear part 421 and a bevel gear part 422, the bevel gear part 422 is engaged with the bevel gear 41, and the spur gear part 421 is connected with the spur gear set 5.

[0065] Specifically, as an optional embodiment in the embodiment, as shown in Figure 5 and Figure 6 shown, the spur gear set 5 comprises

[0066] a first double spur gear 51, a second double spur gear 52, and an output gear 53 which is a spur gear;

[0067] the large spur gear of the first double spur gear 51 is connected with the bevel gear set 4, the small spur gear of the first double spur gear 51 is engaged with the large spur gear of the second double spur gear 52, and the small spur gear of the second double spur gear 52 is engaged with the output gear 53.

[0068] Specifically, as an optional embodiment in the embodiment, as shown in Figure 3 and Figure 4 shown, the housing 2 is provided with an inner chamber 21 and an outer chamber 22, and a stepped surface is formed between the inner chamber 21 and the outer chamber 22;

[0069] a partition plate 3 is arranged in the outer chamber 22, and a plurality of connecting screws pass through the partition plate 3 and are connected with the stepped surface to fix the partition plate 3 in the outer chamber 22;

[0070] the bevel gear set 4 and the first double spur gear 51 are located in the inner chamber 21;

[0071] the large spur gear of the second double spur gear 52 is located in the inner chamber 21, and the small diameter gear thereof passes through the partition plate 3 and extends into the outer chamber 22;

[0072] the output gear 53 is located in the outer chamber 22.

[0073] Specifically, as an optional embodiment in the embodiment, as shown in Figure 3 andFigure 4 As shown, a plurality of positioning columns 23 are arranged on the step surface, and threaded holes are arranged in the positioning columns 23;

[0074] The connecting screw is connected with the positioning column 23 after passing through the partition plate 3, and the partition plate 3 abuts against the positioning column 23.

[0075] In the embodiment, the positioning column 23 is integrally formed with the cover 2, and the installation position of the partition plate 3 is facilitated to be controlled through the positioning column 23.

[0076] In the embodiment, the cover 2 is integrally injection molded.

[0077] In the electric operation, the DC motor 1 drives the bevel gear 41 to rotate, the bevel gear 41 drives the double bevel gear 42 to rotate, the double bevel gear 42 drives the output gear 53 to rotate through the first double spur gear 51 and the second double spur gear 52 in sequence, the output gear 53 drives the connecting rod 7 to rotate in the circumferential direction, and the connecting rod 7 drives the transmission arm 6 to swing back and forth in the circumferential direction.

[0078] The electric operation is installed in the molded case circuit breaker, like Figure 8 As shown, the molded case circuit breaker comprises a circuit breaker shell 8, a mechanism rotating shaft 81 and a ratchet wheel 82, the ratchet wheel 82 is installed on the mechanism rotating shaft 81, the electric operation is installed in the circuit breaker shell 8, when the electric operation drives the transmission arm 6 to swing back and forth, the push plate 62 at the upper end of the transmission arm 6 cooperates with the ratchet wheel 82 in the circuit breaker shell 8, the push plate 62 rotates to drive the ratchet wheel 82 to rotate, the ratchet wheel 82 further drives the mechanism rotating shaft 81 to store energy, the push plate 62 is reset at the same time, and the ratchet wheel 82 is also reset at the same time, at this time, the mechanism rotating shaft 81 remains stationary, with the push plate 62 swinging towards the ratchet wheel 82 again, the ratchet wheel 82 and the mechanism rotating shaft 81 are continuously driven to rotate, and the circuit breaker continues to store energy.

[0079] The electric operation for the molded case circuit breaker has high stability of the DC motor 1, so that the overall operation power consumption of the electric operation is lower. The DC motor 1 drives the connecting rod 7 to rotate through the bevel gear set 4+spur gear set 5, the overall structure is stable and reliable, and is convenient to assemble and disassemble and maintain. Secondly, the cover 2 is integrally injection molded, and has higher protection level. The electric operation has simple and reliable structure, low material cost, and is not easy to be damaged.

[0080] Each device (parts without specific structure) selected in the application is a general standard part or a part known by the person skilled in the art, and the structure and principle thereof can be known by the person skilled in the art through technical manual or through conventional experimental method.

[0081] In the description of the embodiments of the utility model, unless another definite provision and limitation, the term " install " " link " " connection " should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be direct connection, also can indirectly connect through the intermediate medium, can be the intercommunication of two elements. For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0082] In the description of the utility model, it should be explained that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0083] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. The device embodiments described above are only schematic, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, and for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the displayed or discussed mutual ones can be through some communication interface, indirect coupling or communication connection of the devices or units, which can be electrical, mechanical or other forms.

[0084] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, i.e. can be located in one place, or can be distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment scheme.

[0085] In addition, the functional units in each embodiment of the utility model can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit.

[0086] With the above ideal embodiment of the present application as the inspiration, through the above description, relevant staff can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content in the specification, and the technical scope must be determined according to the scope of claims.

Claims

1. An electrically operated for molded case circuit breakers, characterized in that, The utility model relates to a kind of electric operations for moulded case circuit breaker, including Cover (2), the straight gear set (5) and bevel gear set (4) are equipped in the cover (2), bevel gear set (4) is connected with the output gear (53) of straight gear set (5) and is provided with connecting rod (7) on it; DC motor (1), the DC motor (1) is arranged on the upper end of cover (2) by motor support (11), the DC motor (1) is inserted and connected from the upper end of cover (2), and is drivenly connected by bevel gear set (4) and the input end of straight gear set (5); Transmission arm (6), the transmission arm (6) is vertically rotatably arranged, the transmission arm (6) lower end is equipped with long slot (61), transmission arm (6) lower end is inserted into cover (2), and is matched with connecting rod (7), transmission arm (6) upper end is provided with the push plate (62) for being matched with moulded case circuit breaker; Side cover (24), the side cover (24) is fixedly arranged, and the side cavity of cover (2) is shielded.

2. According to claim 1, a kind of electric operations for moulded case circuit breaker, characterized in that, The bevel gear set (4) includes Bevel gear (41), the bevel gear (41) is arranged on the rotating shaft of DC motor (1), the bevel gear (41) is vertically arranged and is rotated in horizontal direction; Double bevel gear (42), the double bevel gear (42) is transversely arranged in cover (2) by mounting shaft, the double bevel gear (42) includes straight tooth part (421) and bevel gear part (422), the bevel gear part (422) is engaged with bevel gear (41), the straight tooth part (421) is connected with straight gear set (5).

3. According to claim 1, a kind of electric operations for moulded case circuit breaker, characterized in that, The straight gear set (5) includes First double straight gear (51), second double straight gear (52) and output gear (53), the output gear (53) is straight gear; The large straight gear of the first double straight gear (51) is connected with bevel gear set (4), the small straight gear of the first double straight gear (51) is engaged with the large straight gear of second double straight gear (52), the small straight gear of second double straight gear (52) is engaged with output gear (53).

4. According to claim 3, a kind of electric operations for moulded case circuit breaker, characterized in that, The cover (2) is equipped with inner chamber (21) and outer chamber (22) in, the step surface is formed between the inner chamber (21) and the outer chamber (22); The outer chamber (22) is provided with the partition (3), and a plurality of connecting screws are connected with the step surface after passing through the partition (3), so as to fix the partition (3) in the outer chamber (22); The bevel gear set (4) and the first double straight gear (51) are located in the inner chamber (21); The large straight gear of the second double straight gear (52) is located in the inner chamber (21), and the small diameter gear thereof extends to the outer chamber (22) by passing through the partition (3); The output gear (53) is located in the outer chamber (22).

5. According to claim 4, a kind of electric operations for moulded case circuit breaker, characterized in that, A plurality of positioning columns (23) are provided on the step surface, and threaded holes are formed in the positioning columns (23). The connecting screw is connected with the positioning column (23) after passing through the partition plate (3), and the partition plate (3) is in abutment with the positioning column (23).

6. The electric handle for molded case circuit breaker according to claim 1, wherein, The cover shell (2) is integrally injection molded.

Images