CN209766339U

CN209766339U - Miniature circuit breaker opening and closing driving device

Info

Publication number: CN209766339U
Application number: CN201920933095.0U
Authority: CN
Inventors: 杨平孝; 陈清槐; 周素珍
Original assignee: Xiamen Shanxiu Sunshine Technology Co Ltd
Current assignee: Xiamen Shanxiu Sunshine Technology Co Ltd
Priority date: 2019-06-20
Filing date: 2019-06-20
Publication date: 2019-12-10
Anticipated expiration: 2029-06-20

Abstract

The utility model discloses a miniature circuit breaker divide-shut brake drive arrangement, including the casing, set up circuit board, motor, drive gear subassembly on the casing, separation and reunion coupling mechanism, motor and circuit board electricity be connected, the motor pass through drive gear subassembly and realize the drive to separation and reunion coupling mechanism, separation and reunion coupling mechanism include final gear and driving medium, final gear be located the terminal of drive gear subassembly and drive gear subassembly meshing, the one end of driving medium stretch out casing and circuit breaker handle hookup, final gear, driving medium and circuit breaker handle coaxial arrangement, final gear drive the driving medium and rotate. The utility model discloses a to closing coupling mechanism setting at last stage, be favorable to carrying out position detection and control to it.

Description

Miniature circuit breaker opening and closing driving device

Technical Field

The utility model belongs to the technical field of the circuit breaker technique and specifically relates to miniature circuit breaker divide-shut brake drive arrangement.

Background

The miniature circuit breaker, abbreviated as MCB, is a terminal protection electrical appliance which is most widely used in the power distribution device of an electrical terminal. The switch-on/off driving module, namely an electric operating mechanism, is an accessory used for controlling the switch-off and switch-on of an MCB (magnetic control bus), and can realize the remote electric switch-on and switch-off of a circuit breaker.

The patent with publication number CN203277259U discloses an electric operating mechanism of a circuit breaker, in the second-stage gear, two coaxial gears with clutch function are adopted, wherein the coaxial driving wheel is firstly turned forward to drive the circuit breaker handle to switch on, and then turned reversely by a certain angle to the middle position, so that the circuit breaker can be manually operated to switch off the handle, and the position of the second-stage main gear needs to be detected to control the circuit breaker. And the reverse rotation can be continued to drive the circuit breaker to trip and open the brake. According to the scheme, the clutch device is arranged on the second-stage gear, the second-stage main gear is high in rotating speed and needs a quick detection function position detection element to carry out position detection on the second-stage main gear; there is the reduction ratio action wheel and end gear, the drive turned angle of action wheel is far away than the angle of circuit breaker handle divide-shut brake promptly, action wheel drive circuit breaker combined floodgate needs pivoted angle, the combined floodgate angle that equals the circuit breaker multiplies its reduction ratio, reversal to the intermediate position, the angle margin of idle stroke is not enough big, make comparatively complicated to its control, so at circuit breaker combined floodgate position, the drive wheel reversal to the intermediate position, reversal to the dropout position all need set up position detection component and detect, make to rotate and stop. The arrangement of a plurality of position detecting elements will increase the cost, which limits the price competitiveness of the product for the occasion of large-scale demands, such as the application of a cost-controlled circuit breaker.

Disclosure of Invention

An object of the utility model is to provide a miniature circuit breaker divide-shut brake drive arrangement through setting up at last stage with the coupling mechanism that closes to do benefit to and carry out position detection to it. In order to achieve the above purpose, the utility model adopts the following technical scheme:

The utility model discloses a miniature circuit breaker divide-shut brake drive arrangement, including the casing, set up circuit board, motor, transmission gear subassembly and separation and reunion coupling mechanism on the casing, motor and circuit board electricity be connected, separation and reunion coupling mechanism include final gear and driving medium, final gear be located the terminal and the meshing of transmission gear subassembly, the one end of driving medium stretch out casing and the hookup of circuit breaker handle, final gear, driving medium and circuit breaker handle coaxial arrangement, final gear drive the driving medium and rotate.

The circuit breaker is characterized by further comprising a tripping piece hinged on the shell, wherein a tripping connecting rod and a tripping driving rod are arranged on the tripping piece, the tripping connecting rod extends out of the shell and is linked with a lock catch of the circuit breaker, the tripping driving rod is separated from or matched with a final-stage gear in an abutting mode, and the final-stage gear rotates to abut against the tripping driving rod to drive the tripping connecting rod to rotate.

The final gear comprises a hollow gear body and a hollow shaft which protrudes upwards along the axis of the gear body, the gear body is mounted on the transmission part, the hollow shaft is provided with a switching-off feeler and a switching-on feeler which are positioned on the same plane, and the position detection element is positioned on the rotation path of the final gear and respectively abutted against the switching-off feeler and the switching-on feeler when switching off and switching on.

Preferably, the hollow shaft is further provided with an intermediate antenna which is positioned on the same plane with the opening antenna and the closing antenna.

The gear comprises a gear body, a tripping rib, a tripping deflector rod and a tripping piece, wherein the tripping rib protrudes and extends in the circumferential direction below the gear body, and is separated from or in interference fit with the tripping deflector rod on the tripping piece.

Preferably, gear main part inner wall circumference be provided with a lug, driving medium circumference be provided with a driving medium boss, lug and driving medium boss separation or conflict cooperation when rotating.

The tripping piece comprises a hinged portion, a hinged hole is formed in the middle of the hinged portion, a positioning column for the hinged hole to insert is arranged on the shell, the tripping connecting rod is perpendicular to the hinged portion and integrally arranged, and the tripping deflector rod is integrally connected with the hinged portion in the circumferential direction.

Preferably, the end of the tripping deflector rod is arc-shaped.

The shell is provided with a limiting groove, and the tripping connecting rod penetrates through the limiting groove to extend out of the shell to be linked with the lock catch of the circuit breaker.

Preferably, the driving medium include transmission main part and transmission shaft, the transmission shaft be the dysmorphism along axial cross-section, the junction of transmission main part and transmission shaft be provided with special-shaped groove, be equipped with special-shaped shaft hole on the circuit breaker handle axle center, transmission shaft one end insert special-shaped groove and be connected with the transmission main part, the other end inserts special-shaped shaft hole and is connected with the circuit breaker handle.

The transmission gear assembly comprises a worm, a worm wheel and a plurality of reduction gears, the worm is fixedly or integrally arranged on an output shaft of the motor, the worm wheel is meshed with the worm, the worm wheel is meshed with the reduction gears, and the reduction gears are meshed with the final-stage gear after being meshed in sequence.

Due to the adoption of the structure, the utility model discloses following beneficial effect has:

1. The utility model discloses a set up separation and reunion coupling mechanism (final gear and driving medium) at actuating mechanism's final stage, the rotation center of final gear and driving medium is coaxial with circuit breaker handle rotation center, and final gear is 1 with the driving medium: 1, no reduction ratio, the driving medium is connected with the circuit breaker handle, and the handle drive ratio of final stage gear and circuit breaker is 1 promptly: 1, no reduction ratio. The last-stage gear is arranged at the tail end of the transmission mechanism and has the slowest rotating speed, so that the position sensor can detect and control the position of the transmission mechanism; because the transmission ratio of the final-stage gear to the handle of the circuit breaker is 1: the final-stage gear drive switching-on rotation angle is far smaller than that of a second-stage driving wheel with a reduction ratio, so that the final-stage gear drive is reversed to an intermediate position after switching-on without touching a tripping piece, the maximum idle stroke is realized, and the position control is facilitated.

2. The utility model discloses a last stage gear control tripping member links with the hasp of external circuit breaker, and the rotation direction of last stage gear suits with the rotation direction of tripping member (accords with gear engagement's direction), has simplified the structure of tripping member, is favorable to reliably tripping.

3. The utility model discloses only need set up a position detection component, can realize the detection of two to three positions, the cost is reduced.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of fig. 1 with the circuit board removed.

FIG. 3 is a schematic view of the motor, drive gear assembly, final gear, and position sensing element of FIG. 2 removed.

fig. 4 is a schematic structural view of the connection between the transmission member and the trip member and the circuit breaker.

FIG. 5 is a schematic view of the structure of the handle of the circuit breaker

FIG. 6 is a schematic view of a transmission member and a drive shaft.

fig. 7 is a schematic structural view of the final stage gear.

Fig. 8 is another angular configuration of the final stage gear.

Fig. 9 is a schematic diagram of an initial state in an embodiment of the present invention.

Fig. 10 is a schematic diagram illustrating a state of a closing position according to an embodiment of the present invention.

Fig. 11 is a schematic view showing a positional relationship between the release member and the final stage gear of fig. 10.

Fig. 12 is a schematic diagram of a state of an intermediate position in the first embodiment of the present invention.

Fig. 13 is a schematic view showing the positional relationship between the release member and the final stage gear in fig. 12.

Fig. 14 is a schematic diagram of a state of a trip position according to a first embodiment of the present invention.

Fig. 15 is a schematic view showing the positional relationship between the release member and the final gear in fig. 14.

Fig. 16 is a schematic state diagram of the final stage gear according to the second embodiment of the present invention.

Description of the main symbols:

1: a housing, 11: positioning column, 12: spacing groove, 2: circuit board, 3: motor, 4: transmission gear assembly, 41: worm, 42: worm wheel, 43: reduction gear, 5: drive shaft, 6: transmission main body, 61: profile groove, 62: transmission main body boss, 7: final stage gear, 71: gear main body, 711: bump, 72: a hollow shaft, 721: opening antenna, 722: closing feeler, 723: intermediate antenna, 73: tripping rib, 8: position detection element, 9: disengaging piece, 91: hinge, 911: hinge hole, 92: tripping deflector rod, 93: trip connecting rod, 10: circuit breaker, 20: breaker handle, 21: irregular shaft hole, 30: and (5) locking.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention is further described in detail with reference to the accompanying drawings and specific embodiments.

Example one

As shown in fig. 1 to 3, the present embodiment discloses a switching-closing driving device for a miniature circuit breaker, which includes a housing 1, a circuit board 2 disposed on the housing 1, a motor 3, a transmission gear assembly 4, a transmission member (including a transmission shaft 5 and a transmission main body 6), a final gear 7, a position detection element 8, and a release member 9. The motor 3 is electrically connected with the circuit board 2, and the motor 3 drives the final gear 7 through the transmission gear assembly 4.

As shown in fig. 2, the transmission gear assembly 4 includes a worm 41, a worm wheel 42, and a plurality of reduction gears 43. The worm 41 is fixed or integrally arranged on the output shaft of the motor 3, the worm wheel 42 is meshed with the worm 41, the worm wheel 42 is meshed with the reduction gear 43, and the reduction gears 43 of a plurality of stages are meshed with the final gear 7 after being meshed in sequence. The final gear 7 is arranged on the final end transmission, so that the rotating speed is slowest, and the angle margin of idle stroke is large.

Referring to fig. 4 to 6, in order to facilitate transmission, the section of the transmission shaft 5 along the axial direction is irregular, a special-shaped groove 61 is provided at the joint of the transmission main body 6 and the transmission shaft 5, and an irregular shaft hole 21 for inserting the transmission shaft 5 is provided on the axis of the breaker handle 20. One end of the transmission shaft 5 extends out of the shell 1 and is inserted into the special-shaped shaft hole 21 of the breaker handle 20, the other end of the transmission shaft 5 is inserted into the special-shaped groove 61 of the transmission main body 6, the transmission main body 6 is fixed on the transmission shaft 5, the final gear 7 is installed on the transmission main body 6, and the position detection element 8 is arranged on the circuit board 2 and is positioned on the rotation path of the final gear 7.

As shown in fig. 11, the release 9 includes a hinge portion 91, a release lever 92, and a release connecting rod 93. The middle part of the hinge part 91 is provided with a hinge hole 911, the shell 1 is provided with a positioning column 11 for inserting the hinge hole 911, the hinge hole 911 is inserted into the positioning column 11, and the fastening part 9 is hinged and rotated along the positioning column 11. The trip connecting rod 93 is integrally provided perpendicular to the hinge portion 91, and the trip shift lever 92 is integrally connected to the hinge portion 91 in the circumferential direction. The housing 1 is provided with a limiting groove 12, and the trip connecting rod 93 passes through the limiting groove 12 and extends out of the housing 1 to be linked with the latch 30 of the circuit breaker 10. The end of the trip lever 92 is arc-shaped, and the trip lever 92 is separated from or in interference fit with the final stage gear 7.

As shown in fig. 7 and 8, the final stage gear 7 includes a hollow gear body 71, a hollow shaft 72 projecting upward in the axial direction of the gear body 71, and a release rib 73 projecting in the circumferential direction below the gear body 71. The hollow shaft 72 is provided with an opening contact 721 and a closing contact 722 on the same plane. A lug 711 is circumferentially arranged on the inner wall of the gear main body 71, a transmission main body boss 62 is circumferentially arranged on the transmission main body 6, and the lug 711 is separated from or matched with the transmission main body boss 62 in an abutting mode when rotating. The final gear 7 rotates, and the trip rib 73 abuts against the arc-shaped end of the trip lever 92 to rotate the trip link 93.

As shown in fig. 9-15, the principle of the process of opening or closing the circuit breaker of the present invention is described in detail as follows:

1. As shown in fig. 9, in the initial state, the circuit breaker is in the open position and the final gear is in the intermediate position.

2. As shown in fig. 10 and fig. 11, when the utility model discloses during closing, driving motor 3 drives transmission gear assembly 4 and rotates, and then drives final gear 7 anticlockwise and moves, and final gear 7 drives the driving medium and circuit breaker handle 20 rotates and realizes that circuit breaker 10 closes a floodgate, and the closing feeler 722 on final gear 7 is when touchhing position detecting element 8, explains to close a floodgate and targets in place.

3. As shown in fig. 12 and 13, when the switch is in place, the driving motor 3 drives the transmission gear assembly 4 to rotate, so as to drive the final gear 7 to rotate clockwise, the final gear 7 reaches the middle position according to the designed rotation time, a certain disengagement angle is formed between the projection 711 of the final gear 7 and the transmission body boss 62, when the breaker handle 20 and the transmission member are switched off, the projection 711 of the final gear 7 does not touch the transmission body boss 62, and at this time, manual switch-on or switch-off can be manually performed.

4. As shown in fig. 14 and 15, during opening, the driving motor 3 drives the transmission gear assembly 4 to rotate, and further drives the final gear 7 to rotate clockwise, the final gear 7 rotates to the position of the tripping shift lever 92 to abut against the tripping lever, so as to drive the tripping member 9 to rotate, the tripping member 9 drives the mechanism of the circuit breaker 10 to trip and open the brake, at this time, the tripping feeler 721 on the final gear 7 touches the position detection element 8, which indicates that the brake is in place, at this time, the tripping member 9 is in a tripping state, the circuit breaker 10 cannot be tripped, and the brake cannot be manually closed.

5. When the final gear 7 rotates counterclockwise to the middle position, and the trip rib 73 of the final gear 7 is separated from the trip shift lever 92 of the trip device 9 by a certain angle, the rotation of the latch of the circuit breaker 10 and the trip device 9 linked therewith is not interfered by the trip rib 73 of the final gear 7, that is, the circuit breaker returns to the initial state, and the closing restriction of the circuit breaker 10 is released. At the moment, manual closing can be carried out manually.

example two

As shown in fig. 16, the present embodiment is different from the first embodiment in that: the hollow shaft 72 of the final gear 7 of the present embodiment is further provided with an intermediate antenna 723, which is located on the same plane as the opening antenna 721 and the closing antenna 722. When the final gear 7 is in the neutral position, the intermediate horn 723 on the final gear 7 hits the position detecting element 8, which indicates that the final gear 7 is in the neutral position.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention.

Claims

1. Miniature circuit breaker divide-shut brake drive arrangement, its characterized in that: including the casing, set up circuit board, motor, transmission gear assembly and separation and reunion coupling mechanism on the casing, motor and circuit board electricity be connected, its characterized in that: the clutch connecting mechanism comprises a final gear and a transmission piece, the final gear is positioned at the tail end of the transmission gear assembly and is meshed with the transmission gear assembly, one end of the transmission piece extends out of the shell to be connected with the breaker handle, the final gear, the transmission piece and the breaker handle are coaxially arranged, and the final gear drives the transmission piece to rotate.

2. The opening/closing drive device of a miniature circuit breaker according to claim 1, wherein: the tripping device is provided with a tripping connecting rod and a tripping driving rod, the tripping connecting rod extends out of the shell and is linked with a lock catch of the circuit breaker, the tripping driving rod is separated from or matched with a final-stage gear in an abutting mode, and the final-stage gear rotates to drive the tripping connecting rod to rotate when the final-stage gear abuts against the tripping driving rod.

3. The opening/closing drive device of a miniature circuit breaker according to claim 2, wherein: the final-stage gear comprises a hollow gear body and a hollow shaft which protrudes upwards along the axis of the gear body, the gear body is installed on the transmission part, the hollow shaft is provided with a switching-off feeler and a switching-on feeler which are located on the same plane, and the position detection element is located on a rotating path of the final-stage gear and is respectively abutted to the switching-off feeler and the switching-on feeler when switching off and switching on.

4. the opening/closing drive device of a miniature circuit breaker according to claim 3, wherein: the hollow shaft is also provided with a middle antenna which is positioned on the same plane with the opening antenna and the closing antenna.

5. The opening/closing drive device of a miniature circuit breaker according to claim 3, wherein: a tripping rib protrudes and extends in the circumferential direction below the gear main body, and the tripping rib is separated from or matched with a tripping deflector rod on the tripping piece in an abutting mode.

6. The opening/closing drive device of a miniature circuit breaker according to claim 3, wherein: the gear main part inner wall circumference be provided with a lug, driving medium circumference be provided with a driving medium boss, lug and driving medium boss separation or conflict cooperation when rotating.

7. The opening/closing drive device of a miniature circuit breaker according to claim 2, wherein: the tripping piece comprises a hinged part, a hinged hole is formed in the middle of the hinged part, a positioning column for the hinged hole to insert is arranged on the shell, the tripping connecting rod is perpendicular to the hinged part and integrally arranged, and the tripping deflector rod is integrally connected with the hinged part in the circumferential direction; the end part of the tripping deflector rod is arc-shaped.

8. The opening/closing drive device of a miniature circuit breaker according to claim 7, wherein: the shell is provided with a limiting groove, and the tripping connecting rod penetrates through the limiting groove and extends out of the shell to be linked with the lock catch of the circuit breaker.

9. The opening/closing drive device of a miniature circuit breaker according to claim 1, wherein: the driving medium include transmission main part and transmission shaft, the transmission shaft be special-shaped along axial cross-section, the junction of transmission main part and transmission shaft be provided with special-shaped groove, be equipped with special-shaped shaft hole on the circuit breaker handle axle center, transmission shaft one end insert special-shaped groove and be connected with the transmission main part, the other end inserts special-shaped shaft hole and is connected with the circuit breaker handle.

10. The opening/closing drive device of a miniature circuit breaker according to claim 1, wherein: the transmission gear assembly comprises a worm, a worm wheel and a plurality of reduction gears, the worm is fixedly or integrally arranged on an output shaft of the motor, the worm wheel is meshed with the worm, the worm wheel is meshed with the reduction gears, and the reduction gears are meshed with the final-stage gear after being meshed in sequence.