Control Structure of an Electric Operating Mechanism for a Molded Case Circuit Breaker

Abstract

The present invention relates to a control structure for an electric operating mechanism of a molded case circuit breaker, including a housing, on which a gear clutch mechanism and a control slider are provided; a manual operation station and an electric operation station are formed on the housing, and the control slider reciprocates between the manual operation station and the electric operation station; when the control slider moves to the manual operation station, the gear clutch mechanism is in a combined state; when the control slider moves to the electric operation station, the control slider drives the gear clutch mechanism to be in a separated state. Misoperation will not occur, and the safety is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breakers, and in particular to a control structure for an electric operating mechanism of a molded case circuit breaker. Background Art

[0002] High-voltage circuit breakers are electrical appliances with contacts. The opening and closing of the circuit are achieved by the separation and combination of the contacts. Therefore, it must rely on a certain mechanical operating system to complete.

[0003] The mechanical operating device outside the circuit breaker body is called an operating mechanism. The existing operating mechanisms of circuit breakers can be manually operated or electrically operated, but the manual operation and electric operation are respectively controlled by different components. When the operating mechanism needs to be manually operated, first, the power supply for electric operation needs to be cut off by the first control component, then the clutch device needs to be cut off by the second control component, and finally, the manual operation can be carried out. The operating mechanism has a complex structure, a large volume, and inconvenient operation. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a control structure for an electric operating mechanism of a molded case circuit breaker.

[0005] The technical solution adopted by the present invention to solve its technical problems is:

[0006] A control structure for an electric operating mechanism of a molded case circuit breaker includes a housing, on which a gear clutch mechanism and a control slider are provided; a manual operation station and an electric operation station are formed on the housing, and the control slider reciprocates between the manual operation station and the electric operation station;

[0007] When the control slider moves to the manual operation station, the gear clutch mechanism is in a combined state; when the control slider moves to the electric operation station, the control slider drives the gear clutch mechanism to be in a separated state.

[0008] Further, an output shaft, a motor, and a gear transmission mechanism are provided on the housing. The input end of the gear transmission mechanism is connected to the motor, and the output end of the gear transmission mechanism is connected to the output shaft;

[0009] When the gear clutch mechanism is in a combined state, the motor drives the output shaft to rotate through the gear transmission mechanism;

[0010] When the gear clutch mechanism is in a separated state, the gear transmission mechanism disconnects the power transmission between the motor and the output shaft.

[0011] Further: A micro switch for controlling the operation of the motor is provided on the housing, and a first trigger portion for contact and cooperation with the micro switch is formed on the control slider;

[0012] When the control slider moves to the electric operation station, the first trigger part of the control slider contacts and triggers the micro switch, so that the motor is in a power-off state.

[0013] Furthermore: A connecting part for cooperating with the manual operating rod is formed at the upper end of the output shaft, and a shielding part is formed on the control slider;

[0014] When the control slider moves to the manual operation station, the shielding part of the control slider moves above the connecting part of the output shaft.

[0015] Furthermore: The gear clutch mechanism includes a mounting shaft, a lower clutch gear, an upper clutch gear, a compression spring and a clutch pressing block, and the diameter of the upper clutch gear is smaller than that of the lower clutch gear;

[0016] The housing includes a top plate and a bottom plate;

[0017] A guiding pressure rod is formed at the upper end of the clutch pressing block;

[0018] The mounting shaft is fixedly arranged between the top plate and the bottom plate. A limit snap ring is arranged on the mounting shaft. The mounting shaft is sequentially sleeved with a compression spring, a lower clutch gear and an upper clutch gear from bottom to top. The compression spring, the lower clutch gear and the upper clutch gear are located between the bottom plate and the limit snap ring. A rotational fit is formed between the lower clutch gear and the upper clutch gear and the mounting shaft. A bayonet is formed on the lower clutch gear, and a convex block for cooperating with the bayonet is arranged on the upper clutch gear. The clutch pressing block is arranged at the upper end of the lower clutch gear. The upper end of the guiding pressure rod of the clutch pressing block passes through the top plate, and a second trigger part for contact cooperation with the upper end of the guiding pressure rod is formed on the control slider.

[0019] Furthermore: The gear transmission mechanism includes a first gear, a second gear, a third gear, a fourth gear, a fifth gear and a gear clutch mechanism, and the first gear is connected to the motor rotating shaft;

[0020] The fifth gear is sleeved on the output shaft. A side stop convex block is arranged on the output shaft, and a lower stop convex block is arranged below the fifth gear;

[0021] The second gear, the third gear and the fourth gear are arranged in the housing;

[0022] The first gear meshes with the second gear, the second gear meshes with the third gear, the third gear meshes with the lower clutch gear of the gear clutch mechanism, the upper clutch gear of the gear clutch mechanism meshes with the fourth gear, and the fifth gear meshes with the fourth gear.

[0023] Further: A first transmission rod, a second transmission rod, and a slider for connecting the switch lever of the plastic case circuit breaker are fixedly arranged on the output shaft. A perforation for connecting with the switch lever is formed on the slider. One end of the first transmission rod is fixedly connected to the output shaft, the other end of the first transmission rod is rotatably connected to one end of the second transmission rod, and the other end of the second transmission rod is rotatably connected to the slider.

[0024] Further: The second triggering part for controlling the slider is a guiding inclined surface.

[0025] The beneficial effects of the present invention are as follows: By using the control slider, it can simultaneously achieve motor power-off, separation of the gear clutch mechanism, and exposure of the connection part. The switching between electric operation and manual operation is convenient, the interlock performance of the two operations is increased, and the structure of the operating mechanism is made simpler. In the electric operation state, the shielding part will block the connection part of the manual operating rod, preventing misoperation and improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below with reference to the accompanying drawings.

[0027] Figure 1 It is a schematic diagram of the control slider in the electric operation position in the present invention;

[0028] Figure 2 It is a schematic diagram of the control slider in the manual operation position in the present invention;

[0029] Figure 3 It is a schematic diagram of the gear transmission mechanism in the present invention;

[0030] Figure 4 It is a schematic diagram of the gear clutch mechanism in the present invention;

[0031] Figure 5 It is a schematic diagram for showing the connection relationship between the bayonet and the clamping protrusion in the present invention;

[0032] Figure 6 It is a schematic diagram for showing the connection relationship between the lower blocking protrusion and the side blocking protrusion in the present invention.

[0033] In the figure, 1 is the housing; 1A is the manual operation station; 1B is the electric operation station; 11 is the microswitch; 12 is the top plate; 13 is the bottom plate; 2 is the gear transmission mechanism; 21 is the first gear; 22 is the second gear; 23 is the third gear; 24 is the fourth gear; 25 is the fifth gear; 251 is the lower blocking projection; 3 is the gear clutch mechanism; 31 is the mounting shaft; 311 is the limit snap ring; 32 is the lower clutch gear; 321 is the bayonet; 33 is the upper clutch gear; 331 is the clamping projection; 34 is the compression spring; 35 is the clutch pressure block; 351 is the guiding pressure rod; 4 is the control slider; 41 is the first triggering part; 42 is the second triggering part; 43 is the shielding part; 5 is the output shaft; 51 is the connecting part; 52 is the side blocking projection; 53 is the first transmission rod; 54 is the second transmission rod; 55 is the slider; 551 is the perforation; 6 is the motor. Detailed implementation manners

[0034] Now, the present invention will be further described in conjunction with specific embodiments. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the components related to the present invention.

[0035] As Figure 1 , a control structure of an electric operating mechanism for a plastic case circuit breaker includes a housing 1, an output shaft 5 arranged on the housing 1 (see Figure 3 ), a motor 6, and a gear transmission mechanism 2. The input end of the gear transmission mechanism 2 is connected to the motor 6, and the output end of the gear transmission mechanism 2 is connected to the output shaft 5. The gear transmission mechanism 2 includes a gear clutch mechanism 3 (see Figure 3 ).

[0036] As Figure 1 , a manual operation station 1A and an electric operation station 1B are arranged inside the housing 1, a control slider 4 is arranged on the housing 1, and the control slider 4 reciprocates between the manual operation station 1A and the electric operation station 1B. When the control slider 4 slides to the manual operation station 1A, the gear clutch mechanism 3 is in a combined state, and the motor 6 drives the output shaft 5 to rotate through the gear transmission mechanism 2. When the control slider 4 slides to the electric operation station 1B, the control slider 4 drives the gear clutch mechanism 3 to be in a separated state. At this time, the connection between the motor 6 and the output shaft 5 is disconnected through the gear transmission mechanism 2, and the operating mechanism can be controlled through the manual operation station 1A.

[0037] As Figure 2 , a microswitch 11 for controlling the operation of the motor 6 is arranged on the housing 1, and a first triggering part 41 for contacting and cooperating with the microswitch 11 is formed on the control slider 4. When the control slider 4 moves to the electric operation station 1B, the first triggering part 41 contacts the microswitch 11 and triggers the microswitch 11. At this time, the motor 6 is in a power-off state.

[0038] AsFigure 1 , the upper end of the output shaft 5 (see Figure 3 ) is provided with a connecting portion 51 for cooperating with the manual operating rod, and one end of the control slider 4 away from the first triggering portion 41 is provided with a shielding portion 43 for shielding the connecting portion 51. When the control slider 4 slides to the manual operating station 1A, the shielding portion 43 moves above the connecting portion 51. At this time, the motor 6 is in the powered-on state.

[0039] As Figure 4 , the housing 1 includes a top plate 12 and a bottom plate 13. The gear transmission mechanism 2 is arranged between the top plate 12 and the bottom plate 13. The gear clutch mechanism 3 includes a mounting shaft 31 vertically fixed between the top plate 12 and the bottom plate 13, a compression spring 34, a lower clutch gear 32, an upper clutch gear 33 sleeved on the mounting shaft 31 in sequence from bottom to top, and a clutch pressing block 35 arranged at the upper end of the lower clutch gear 32. The diameter of the upper clutch gear 33 is smaller than that of the lower clutch gear 32. Two guiding pressure rods 351 are formed at the upper end of the clutch pressing block 35, and the upper ends of the guiding pressure rods 351 pass through the top plate 12. A limiting snap ring 311 is arranged on the mounting shaft 31. The compression spring 34, the lower clutch gear 32, and the upper clutch gear 33 are located between the bottom plate 13 and the limiting snap ring 311.

[0040] As Figure 5 , a rotational fit is formed between both the lower clutch gear 32 and the upper clutch gear 33 and the mounting shaft 31. A bayonet 321 is formed on the lower clutch gear 32, and a convex 331 cooperating with the bayonet 321 is arranged on the upper clutch gear 33.

[0041] As Figure 2 , one end of the control slider 4 located at the first triggering portion 41 is provided with a second triggering portion 42 in contact and cooperation with the upper end of the guiding pressure rod 351, and the second triggering portion 42 is a guiding inclined surface. When the control slider 4 slides towards the electric operating station 1B, the second triggering portion 42 contacts the guiding pressure rod 351 and gradually pushes the guiding pressure rod 351 downward, such that the guiding pressure rod 351 abuts against the lower clutch gear 32 and pushes the lower clutch gear 32 to move downward along the mounting shaft 31, and the bayonet 321 is disengaged from the convex 331, thereby realizing the separation of the upper clutch gear 33 and the lower clutch gear 32, and the gear transmission mechanism 2 is disconnected. At this time, the power of the motor cannot be transmitted to the output shaft 5.

[0042] As Figure 3, the gear transmission mechanism 2 includes a first gear 21, a second gear 22, a third gear 23, a fourth gear 24, a fifth gear 25 and a gear clutch mechanism 3. The first gear 21 is a bevel gear and is fixedly connected to the rotating shaft of the motor 6. The second gear 22, the third gear 23 and the fourth gear 24 are all double gears. The second gear 22 includes a bevel gear meshing with the first gear 21 and a spur gear arranged below the bevel gear. The third gear 23 and the fourth gear 24 each include two spur gears arranged vertically. The spur gear of the second gear 22 meshes with the lower spur gear of the third gear 23. The upper spur gear of the third gear 23 meshes with the lower clutch gear 32 of the gear clutch mechanism 3. The upper spur gear of the fourth gear 24 meshes with the upper clutch gear 33 of the gear clutch mechanism 3. The lower spur gear of the fourth gear 24 meshes with the fifth gear 25.

[0043] As Figure 6 , the fifth gear 25 is sleeved on the output shaft 5. A side stop projection 52 is arranged on the output shaft 5, and a lower stop projection 251 is arranged below the fifth gear 25.

[0044] As Figure 3 , a first transmission rod 53 is fixedly connected to the output shaft 5. One end of the first transmission rod 53 away from the output shaft 5 is fixedly connected to a second transmission rod 54. One end of the second transmission rod 54 away from the first transmission rod 53 is rotatably connected to a slider 55 for connecting the toggle lever of the molded case circuit breaker. A through hole 551 for connecting with the toggle lever is formed on the slider 55.

[0045] Specific implementation process:

[0046] When the control slider 4 moves to the electric operation station 1B, the first trigger portion 41 contacts and triggers the microswitch 11, and the motor 6 is in a power-off state. At the same time, the second trigger portion 42 contacts and pushes the guide pressure rod 351 downward, and the guide pressure rod 351 pushes the lower clutch gear 32 to separate from the upper clutch gear 33, and the gear clutch mechanism 3 is in a clutch state. At this time, the manual operating rod is installed in the connecting portion 51, and the manual operating rod is rotated to drive the output shaft 5 to rotate. The output shaft 5 rotates to drive the side stop projection 52 to toggle the lower stop projection 251 and bypass the lower stop projection 251. At this time, the output shaft 5 drives the first transmission rod 53 to swing and pulls the second transmission rod 54 to move, and further pulls the slider 55. When the slider 55 moves, it drives the toggle lever of the molded case circuit breaker to achieve closing; when the output shaft 5 is rotated in the reverse direction, the side stop projection 52 toggles the lower stop projection 251 in the reverse direction and bypasses the lower stop projection 251. The output shaft 5 drives the first transmission rod 53 to swing and pushes the second transmission rod 54 to move, and further pushes the slider 55. When the slider 55 moves, it drives the toggle lever of the molded case circuit breaker to achieve opening.

[0047] When the control slider 4 moves to the manual operation station 1A, the shielding portion 43 moves above the connecting portion 51 to cover the connecting portion 51. At this time, the first trigger portion 41 disengages from the microswitch 11, the motor 6 is powered on, the second trigger portion 42 disengages from the guiding pressure lever 351, the gear clutch mechanism 3 is in the combined state, the motor 6 drives the output shaft 5 to rotate through the gear transmission mechanism 2, the output shaft 5 drives the first transmission rod 53 to swing, when the first transmission rod 53 swings, it pulls (or pushes) the second transmission rod 54 to move, and further pulls (or pushes) the slider 55. When the slider 55 moves, it drives the lever of the molded case circuit breaker switch to achieve closing (or opening).

[0048] Using the control slider 4 can simultaneously achieve three functions: power-off of the motor 6, separation of the gear clutch mechanism 3, and exposure of the connecting portion 51. The structure is simpler and the operation is more convenient.

[0049] Enlightened by the ideal embodiments of the present invention described above, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A control structure for an electric operating mechanism of a molded case circuit breaker, characterized in that, It includes a housing (1), on which a gear clutch mechanism (3) and a control slider (4) are provided; a manual operation station (1A) and an electric operation station (1B) are formed on the housing (1), and the control slider (4) reciprocates between the manual operation station (1A) and the electric operation station (1B); When the control slider (4) moves to the manual operation station (1A), the gear clutch mechanism (3) is in a combined state; when the control slider (4) moves to the electric operation station (1B), the control slider (4) drives the gear clutch mechanism (3) to be in a separated state; An output shaft (5), a motor (6) and a gear transmission mechanism (2) are provided on the housing (1), the input end of the gear transmission mechanism (2) is connected to the motor (6), and the output end of the gear transmission mechanism (2) is connected to the output shaft (5); When the gear clutch mechanism (3) is in a combined state; the motor (6) drives the output shaft (5) to rotate through the gear transmission mechanism (2); When the gear clutch mechanism (3) is in a separated state, the gear transmission mechanism (2) disconnects the power transmission between the motor (6) and the output shaft (5); A microswitch (11) for controlling the operation of the motor (6) is provided on the housing (1), and a first trigger portion (41) for contact cooperation with the microswitch (11) is formed on the control slider (4); When the control slider (4) moves to the electric operation station (1B), the first trigger portion (41) of the control slider (4) contacts and triggers the microswitch (11), so that the motor (6) is in a power-off state; The gear clutch mechanism (3) includes a mounting shaft (31), a lower clutch gear (32), an upper clutch gear (33), a compression spring (34) and a clutch pressure block (35), and the diameter of the upper clutch gear (33) is smaller than that of the lower clutch gear (32); The housing (1) includes a top plate (12) and a bottom plate (13); A guide pressure rod (351) is formed at the upper end of the clutch pressure block (35); The installation shaft (31) is fixedly arranged between the top plate (12) and the bottom plate (13). A limit snap ring (311) is arranged on the installation shaft (31). A compression spring (34), a lower clutch gear (32), and an upper clutch gear (33) are sleeved on the installation shaft (31) in sequence from bottom to top. The compression spring (34), the lower clutch gear (32), and the upper clutch gear (33) are located between the bottom plate (13) and the limit snap ring (311). A rotational fit is formed between the lower clutch gear (32), the upper clutch gear (33) and the installation shaft (31). A bayonet (321) is formed on the lower clutch gear (32), and a clamping protrusion (331) for cooperating with the bayonet (321) is arranged on the upper clutch gear (33). The clutch pressure block (35) is arranged at the upper end of the lower clutch gear (32). The upper end of the guiding pressure rod (351) of the clutch pressure block (35) passes through the top plate (12). A second trigger part (42) for contacting and cooperating with the upper end of the guiding pressure rod (351) is formed on the control slider (4).

2. The control structure for an electric operating mechanism of a molded case circuit breaker according to claim 1, characterized in that, A connection part (51) for cooperating with a manual operating rod is formed at the upper end of the output shaft (5). A shielding part (43) is formed on the control slider (4); When the control slider (4) moves to the manual operation station (1A), the shielding part (43) of the control slider (4) moves above the connection part (51) of the output shaft (5).

3. The control structure for an electric operating mechanism of a molded case circuit breaker according to claim 1, characterized in that, The gear transmission mechanism (2) includes a first gear (21), a second gear (22), a third gear (23), a fourth gear (24), a fifth gear (25), and a gear clutch mechanism (3). The first gear (21) is connected to the rotating shaft of the motor (6); The fifth gear (25) is sleeved on the output shaft (5). A side blocking protrusion (52) is arranged on the output shaft (5). A lower blocking protrusion (251) is arranged below the fifth gear (25); The second gear (22), the third gear (23), and the fourth gear (24) are arranged in the housing (1); The first gear (21) meshes with the second gear (22), the second gear (22) meshes with the third gear (23), the third gear (23) meshes with the lower clutch gear (32) of the gear clutch mechanism (3), the upper clutch gear (33) of the gear clutch mechanism (3) meshes with the fourth gear (24), and the fifth gear (25) meshes with the fourth gear (24).

4. The control structure for an electric operating mechanism of a molded case circuit breaker according to claim 3, characterized in that, A first transmission rod (53), a second transmission rod (54), and a slider (55) for connecting the switch lever of the plastic case circuit breaker are fixedly arranged on the output shaft (5). A perforation (551) for connecting with the switch lever is formed on the slider (55); One end of the first transmission rod (53) is fixedly connected to the output shaft (5), the other end of the first transmission rod (53) is rotatably connected to one end of the second transmission rod (54), and the other end of the second transmission rod (54) is rotatably connected to the slider (55).

5. The control structure for an electric operating mechanism of a molded case circuit breaker according to claim 1, characterized in that, The second trigger part (42) of the control slider (4) is a guiding inclined plane.

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