CN111403244A - Electric operating mechanism - Google Patents

Abstract

The invention relates to an electric operating mechanism, comprising a mechanism frame, a drive assembly arranged on the mechanism frame, and a sliding block which is linked with the drive assembly and can drive the handle of a molded case circuit breaker to perform opening and closing. The drive assembly includes The motor arranged laterally, the bevel gear arranged on the rotating shaft of the motor, the drive gear, the gear set arranged between the bevel gear and the drive gear, the manual operation shaft arranged in linkage with the drive gear, the manual operation shaft arranged between the manual operation shaft and the drive gear. The clutch assembly between the two parts, the opening and closing indicating assembly arranged on the mechanism frame corresponding to the manual operation shaft, the cam plate that is linked with the drive gear, and the pulley that is linked with the cam plate. The slider is provided with an arc matching the pulley. The pulley moves with the cam plate and can reciprocate in the arc guide groove, and the pulley and the slider can be linked together. The invention has the advantages of simple structure, stable and reliable performance, safety and reliability, small size and long service life.

Description

an electric operating mechanism

technical field

The invention relates to the technical field of circuit breakers, in particular to an electric operating mechanism.

Background technique

The electric operating mechanism is a special accessory for the molded case circuit breaker. After working with the circuit breaker, the circuit breaker can be electrically closed, opened and re-buckled at a long distance to realize the centralized and automatic control of the transmission and distribution network. The existing gear set and slider used for the electric operating mechanism on the molded case circuit breaker are usually up and down, and the motor is vertically arranged on the mechanism frame, so that the overall height of the electric operating mechanism is very high, so that the electric operation Institutions take up a lot of space. In order to facilitate the user to directly observe the working state of the circuit breaker, the existing electric operating mechanisms are provided with opening and closing indicating components. However, the structural design of the existing opening and closing indicating components is complicated, and even there is an inconsistency in the opening and closing indicating components. Reliable defects, and the electric operating mechanism has the defects of complex structure, unreliable performance, large volume and short service life.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the defects of the prior art and provide an electric operating mechanism with simple structure, stable and reliable performance, safety and reliability, small size and long service life.

In order to achieve the above purpose, the present invention adopts an electric operating mechanism, which includes a mechanism frame, a drive assembly arranged on the mechanism frame, and a slider that is linked with the drive assembly and can drive the handle of the molded case circuit breaker to perform opening and closing, so Said drive assembly includes a motor arranged transversely, a bevel gear arranged on the rotating shaft of the motor, a drive gear, a gear set arranged between the bevel gear and the drive gear, a manual operation shaft arranged in linkage with the drive gear, The clutch assembly between the shaft and the driving gear, the opening and closing indicator assembly arranged on the mechanism frame corresponding to the manual operation shaft, the cam plate that is linked with the drive gear, and the pulley that is linked to the cam plate. An arc-shaped guide groove matched with the pulley is provided. The pulley moves with the cam plate and can reciprocate in the arc-shaped guide groove, and can form the linkage between the pulley and the slider.

The beneficial effects of the above structure are: the motor of the electric operating mechanism is provided with a bevel gear, and the motor adopts a horizontal structure design, which effectively reduces the overall height of the entire electric operating mechanism, is conducive to reducing the volume of the electric operating mechanism, and separates and closes. The brake indicator assembly is integrated on the manual operation shaft, which is beneficial to improve the reliability of the opening and closing indication. A clutch assembly is arranged between the manual operation shaft and the drive gear. During manual operation, it can be avoided that the manual operation shaft drives the drive gear to reverse. The motor is damaged due to reverse rotation, which is beneficial to prolong the service life of the electric operating mechanism. Therefore, the electric operating mechanism has the advantages of simple structure, stable and reliable performance, safety and reliability, small size and long service life.

In particular, the opening and closing indicator assembly includes a cam that is linked with the manual operation shaft, an opening and closing indicator that is slidably arranged on the mechanism frame and is matched with the cam, and is arranged between the opening and closing indicator and the mechanism frame. The reset spring between the two switches, the opening and closing indicators are respectively provided with an opening indicator and a closing indicator, and the cam moves with the manual operation shaft and can drive the opening and closing indicator to slide back and forth on the mechanism frame. . An opening and closing indicator assembly is arranged on the manual operation shaft. The manual operation shaft rotates and can drive the cam to rotate. The cam pushes the opening and closing indicator to slide back and forth on the mechanism frame, so that the opening and closing of the opening and closing indicator assembly can be realized. instruct.

In particular, the opening and closing indicator is provided with a guide limit block, the mechanism frame is provided with a sliding hole matched with the guide limit block, and the guide limit block is engaged with the sliding hole inside, and the guide limit block moves with the opening and closing indicator and can slide back and forth in the sliding hole, and constitutes the sliding connection between the opening and closing indicator and the mechanism frame. The opening and closing indicator and the mechanism frame are connected by a snap fit, which is convenient for the assembly of the opening and closing indicator and the mechanism frame, and can ensure that the opening and closing indicator can slide reliably on the mechanism frame, which is beneficial to improve the opening and closing indicator. Indicates the reliability of the component's opening and closing instructions.

In particular, a positioning shaft is arranged at one end of the opening and closing indicator corresponding to the return spring, and a limit plate is arranged at the other end of the mechanism frame corresponding to the return spring, and a limit shaft is arranged on the limit plate. The two ends of the reset spring are respectively clamped on the positioning shaft and the limit shaft, and constitute the snap fit of the reset spring with the opening and closing indicator and the mechanism frame. The reset spring is clamped between the opening and closing indicator and the mechanism frame, which can ensure the reliable reset of the opening and closing indicator, facilitate the assembly of the reset spring, the opening and closing indicator and the mechanism frame, and is beneficial to improve the assembly efficiency.

In particular, the clutch assembly includes a ratchet wheel arranged on the manual operation shaft, a plurality of pawls respectively matched with the ratchet wheel, and a plurality of torsion springs respectively arranged between the driving gear and each pawl. An accommodating groove is arranged on the gear, and the plurality of pawls are distributed in the accommodating groove in an annular array and are matched with the ratchet. When the driving gear rotates in the closing direction of the molded case circuit breaker, the driving gear and the manual The operating shaft is linked and matched, and when the driving gear rotates in the opening direction of the molded case circuit breaker, the driving gear and the manual operating shaft are freely matched. A clutch assembly is arranged between the manual operation shaft and the drive gear. During manual operation, when the manual operation shaft rotates in the opening direction of the molded case circuit breaker, the manual operation shaft and the drive gear are freely matched, thereby preventing the gear set from driving the motor in the reverse direction. Rotating to avoid damage to the motor is beneficial to prolong the service life of the electric operating mechanism.

In particular, the gear set includes a bevel gear meshed with the bevel gear, a first transmission gear meshed with the bevel gear, and a second transmission gear meshed with the first transmission gear. The second transmission gear The gear meshes with the driving gear, the bevel gear is rotatably arranged on the lower end face of the mechanism frame, and a support plate is arranged on the mechanism frame corresponding to the bevel gear, the motor is laterally arranged on the support plate, and the mechanism The frame is provided with holes for accommodating the motor. The motor is arranged horizontally on the machine frame, which is beneficial to reduce the overall height of the electric operating mechanism and the volume of the entire electric operating mechanism.

Description of drawings

FIG. 1 is a perspective view of an embodiment of the present invention after being assembled on a molded case circuit breaker.

FIG. 2 is an assembly diagram of a motor and a gear set according to an embodiment of the present invention.

FIG. 3 is an assembly diagram of an opening and closing indicating component and a manual operating shaft according to an embodiment of the present invention.

FIG. 4 is an assembly diagram of a driving gear and a clutch assembly according to an embodiment of the present invention.

FIG. 5 is a perspective view of a slider according to an embodiment of the present invention.

Detailed ways

As shown in FIGS. 1 to 5 , the embodiment of the present invention is an electric operating mechanism, which includes a mechanism frame 10 , a drive assembly 20 disposed on the mechanism frame 10 , which is linked with the drive assembly 20 and can drive the handle of the molded case circuit breaker to perform the splitting operation. The sliding block 11 for closing and closing, the drive assembly 20 includes a motor 21 arranged laterally, a bevel gear 22 arranged on the rotating shaft of the motor 21, a drive gear 23, and a gear arranged between the bevel gear 22 and the drive gear 23 Group 24 , a manual operation shaft 25 arranged in linkage with the drive gear 23 , a clutch assembly 26 arranged between the manual operation shaft 25 and the drive gear 23 , an opening and closing indicator assembly arranged on the mechanism frame 10 corresponding to the manual operation shaft 25 27. The cam disc 28 linked with the drive gear 23, the pulley 29 linked with the cam disc 28, the slider 11 is provided with an arc guide groove 111 matched with the pulley 29, the pulley 29 The cam plate 28 moves and can reciprocate in the arc guide groove 111 , and can constitute the linkage between the pulley 29 and the slider 11 . As shown in FIG. 1 , the opening and closing indicator assembly 27 includes a cam 271 arranged in linkage with the manual operation shaft 25 , an opening and closing indicator 272 slidably arranged on the mechanism frame 10 and matched with the cam 271 , and an opening and closing indicator 272 arranged on the The reset spring 273 between the opening and closing indicator 272 and the mechanism frame 10, the opening and closing indicator 272 are respectively provided with an opening indicator 274 and a closing indicator 275, and the cam 271 is manually operated The shaft 25 moves and can drive the opening and closing indicator 272 to slide back and forth on the mechanism frame 10 . An opening and closing indicator assembly is arranged on the manual operation shaft. The manual operation shaft rotates and can drive the cam to rotate. The cam pushes the opening and closing indicator to slide back and forth on the mechanism frame, so that the opening and closing of the opening and closing indicator assembly can be realized. instruct. The opening and closing indicator 27 is provided with a guide limit block 276, and the mechanism frame 10 is provided with a sliding hole 101 matched with the guide limit block 276, and the guide limit block 276 is engaged with In the sliding hole 101 , the guide limit block 276 moves with the opening and closing indicator 27 and can slide back and forth in the sliding hole 101 , and constitutes the sliding connection between the opening and closing indicator 27 and the mechanism frame 10 . The opening and closing indicator and the mechanism frame are connected by a snap fit, which is convenient for the assembly of the opening and closing indicator and the mechanism frame, and can ensure that the opening and closing indicator can slide reliably on the mechanism frame, which is beneficial to improve the opening and closing indicator. Indicates the reliability of the component's opening and closing instructions. A positioning shaft 277 is provided at one end of the opening and closing indicator 272 corresponding to the return spring 273 , and a limit plate 102 is arranged at the other end of the mechanism frame 10 corresponding to the return spring 273 . A limit shaft 103 is provided. The two ends of the reset spring 273 are respectively engaged with the positioning shaft 277 and the limit shaft 103 , and constitute the snap fit of the reset spring 273 with the opening and closing indicator 272 and the mechanism frame 10 . The reset spring is clamped between the opening and closing indicator and the mechanism frame, which can ensure the reliable reset of the opening and closing indicator, facilitate the assembly of the reset spring, the opening and closing indicator and the mechanism frame, and is beneficial to improve the assembly efficiency.

As shown in FIGS. 1 and 4 , the clutch assembly 26 includes a ratchet wheel 261 disposed on the manual operation shaft 25 , a plurality of pawls 262 respectively matched with the ratchet wheel 261 , a plurality of ratchet wheels 262 respectively disposed on the driving gear 23 and each ratchet wheel The torsion spring 263 between the claws 262, the drive gear 23 is provided with a accommodating groove 231, the plurality of pawls 262 are distributed in the accommodating groove 231 in an annular array and cooperate with the ratchet 261, the said When the driving gear 23 rotates in the closing direction of the molded case circuit breaker, the driving gear 23 cooperates with the manual operation shaft 25. When the driving gear 23 rotates in the opening direction of the molded case circuit breaker, the driving gear 23 and the manual operation shaft 25 free fit. A clutch assembly is arranged between the manual operation shaft and the drive gear. During manual operation, when the manual operation shaft rotates in the opening direction of the molded case circuit breaker, the manual operation shaft and the drive gear are freely matched, thereby preventing the gear set from driving the motor in the reverse direction. Rotating to avoid damage to the motor is beneficial to prolong the service life of the electric operating mechanism.

As shown in FIGS. 1 and 2 , the gear set 24 includes a bevel gear 241 meshing with the bevel gear 22 , a first transmission gear 242 meshing with the bevel gear 241 , and a first transmission gear 242 meshing with the bevel gear 242 . The second transmission gear 243, the second transmission gear 243 meshes with the drive gear 23, the bevel gear 241 is rotatably arranged on the lower end surface of the mechanism frame 10, and the mechanism frame 10 corresponds to the bevel gear 241 A support plate 104 is provided, the motor 21 is laterally arranged on the support plate 104 , and the mechanism frame 10 is provided with a vacant hole 105 for accommodating the motor 21 . The motor is arranged horizontally on the machine frame, which is beneficial to reduce the overall height of the electric operating mechanism and the volume of the entire electric operating mechanism.

The motor of the electric operating mechanism is provided with a bevel gear, and the motor adopts a horizontal structure design, which effectively reduces the overall height of the entire electric operating mechanism, which is conducive to reducing the volume of the electric operating mechanism, and integrates the opening and closing indicating components in the manual operation. On the shaft, it is beneficial to improve the reliability of the opening and closing indication. There is a clutch assembly between the manual operation shaft and the drive gear. During manual operation, it can prevent the manual operation shaft from driving the drive gear to reverse, and avoid damage to the motor due to reverse rotation. It is beneficial to prolong the service life of the electric operating mechanism. Therefore, the electric operating mechanism has the advantages of simple structure, stable and reliable performance, safety and reliability, small size and long service life.

Claims (6)

1. An electric operating mechanism, comprising a mechanism frame, a drive assembly arranged on the mechanism frame, a sliding block that cooperates with the drive assembly and can drive a plastic case circuit breaker handle to perform opening and closing, characterized in that: the described The drive assembly includes a horizontally arranged motor, a bevel gear arranged on the rotating shaft of the motor, a drive gear, a gear set arranged between the bevel gear and the drive gear, a manual operation shaft arranged in linkage with the drive gear, and a manual operation shaft arranged between the manual operation shaft and the drive gear. The clutch assembly between the drive gears, the opening and closing indicator assembly arranged on the mechanism frame corresponding to the manual operation shaft, the cam disc that is linked with the drive gear, and the pulley linked to the cam disc, the slider is provided with The arc guide groove is matched with the pulley, the pulley moves with the cam plate and can reciprocate in the arc guide groove, and can form the linkage between the pulley and the slider. 2 . The electric operating mechanism according to claim 1 , wherein the opening and closing indicator assembly comprises a cam which is linked with the manual operation shaft, and an opening and closing switch which is slidably arranged on the mechanism frame and cooperates with the cam. 3 . The indicator, the reset spring arranged between the opening and closing indicator and the mechanism frame, the opening and closing indicator are respectively provided with the opening indicator and the closing indicator, and the cam moves with the manual operation shaft And it can drive the opening and closing indicator to slide back and forth on the mechanism frame. 3 . The electric operating mechanism according to claim 2 , wherein a guide limit block is provided on the opening and closing indicator, and a sliding block matched with the guide limit block is provided on the mechanism frame. 4 . The guide limit block is engaged in the sliding hole, and the guide limit block moves with the opening and closing indicator and can slide back and forth in the sliding hole, and constitutes the sliding connection between the opening and closing indicator and the mechanism frame. . 4. The electric operating mechanism according to claim 2 or 3, characterized in that: a positioning shaft is provided at one end of the opening and closing indicator corresponding to the return spring, and the other end of the mechanism frame corresponding to the return spring is provided. A limit plate is arranged at one end, and a limit shaft is arranged on the limit plate. The two ends of the return spring are respectively clamped on the positioning shaft and the limit shaft, and constitute the return spring, the opening and closing indicator, and the mechanism frame. snap fit. 5. The electric operating mechanism according to claim 1 or 2, wherein the clutch assembly comprises a ratchet wheel arranged on the manual operation shaft, a plurality of pawls respectively matched with the ratchet wheel, a plurality of ratchet wheels respectively arranged on A torsion spring between the drive gear and each ratchet, the drive gear is provided with an accommodating groove, the plurality of ratchets are distributed in the accommodating groove in an annular array and cooperate with the ratchet, the drive When the gear rotates in the closing direction of the molded case circuit breaker, the driving gear cooperates with the manual operation shaft, and when the driving gear rotates in the opening direction of the molded case circuit breaker, the driving gear cooperates freely with the manual operation shaft. 6. The electric operating mechanism according to claim 1 or 2, wherein the gear set comprises a bevel gear meshed with the bevel gear, a first transmission gear meshed with the bevel gear, and a first transmission gear meshed with the bevel gear. The second transmission gear meshes with the transmission gear, the second transmission gear meshes with the driving gear, the bevel gear is rotatably arranged on the lower end surface of the main frame, and the corresponding bevel gear on the main frame is provided with a A support plate, the motor is laterally arranged on the support plate, and the mechanism frame is provided with a vacant hole for accommodating the motor.

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