CN111952126A

CN111952126A - Electromagnetic closing driving mechanism

Info

Publication number: CN111952126A
Application number: CN202010611492.3A
Authority: CN
Inventors: 姚纪彭; 程勇强
Original assignee: Shenzhen Weiyu Intelligent Technology Co ltd
Current assignee: Shenzhen Weiyu Intelligent Technology Co ltd
Priority date: 2020-06-29
Filing date: 2020-06-29
Publication date: 2020-11-17

Abstract

The invention provides an electromagnetic closing driving mechanism which comprises an electromagnetic driver, a handle, a closing state identification sensor and an opening state identification sensor, wherein the electromagnetic driver is provided with a push rod, the handle is provided with a cam, and the push rod is arranged below the cam; the switching-on state identification sensor is arranged on the cam, and the switching-off state identification sensor is arranged on the handle. The invention aims to solve the technical problems of low production efficiency, large size and complex assembly process of the circuit breaker in the prior art.

Description

Electromagnetic closing driving mechanism

Technical Field

The invention relates to the technical field of low-voltage electrical appliance protection, in particular to an electromagnetic closing driving mechanism.

Background

The circuit breaker generally comprises a contact system, an arc extinguishing system, an operating mechanism, a release, a shell and the like, and has the functions of cutting off and connecting a load circuit and cutting off a fault circuit, so that the accident is prevented from being enlarged, and the safe operation is ensured. In order to reach the relevant standard of a national power grid, the miniature circuit breaker is required to realize the remote or manual control function of the miniature circuit breaker, the miniature circuit breaker is usually realized by using a motor and a gear set in the prior art, the size of the circuit breaker is increased, the use scene of the miniature circuit breaker is reduced, and the assembly is complex.

Disclosure of Invention

In view of this, the present invention provides an electromagnetic closing driving mechanism, and aims to solve the technical problems of low production efficiency, large size and complex assembly process of the circuit breaker in the prior art.

The invention adopts the following technical scheme:

an electromagnetic switching-on driving mechanism comprises a shell, wherein the shell is internally provided with the electromagnetic switching-on driving mechanism, the electromagnetic switching-on driving mechanism comprises an electromagnetic driver, a switching-on state identification sensor and a switching-off state identification sensor, the electromagnetic driver is provided with a push rod, a handle is provided with a cam, and the push rod is arranged below the cam; the switching-on state identification sensor is arranged on the cam, and the switching-off state identification sensor is arranged on the handle; the handle is provided with a pull rod groove, a U-shaped pull rod penetrates through the pull rod groove, one end of the U-shaped pull rod is arranged on the main shaft, and the main shaft is connected with the rotating shaft.

Preferably, the handle is provided with a pull rod groove.

Preferably, the opening state recognition sensor is arranged on the handle between the cam and the pull rod groove.

Preferably, the electromagnetic driver comprises a driver framework, a driver metal support and a push rod, wherein the push rod is arranged on the driver framework, and the driver framework is arranged in the shell fixing groove through the driver metal support.

Preferably, a U-shaped pull rod penetrates through the pull rod groove, one end of the U-shaped pull rod is arranged on the main shaft, and the main shaft is connected with the rotating shaft of the movable contact.

Preferably, the push rod is located directly below the cam.

Preferably, the push rod is connected with the driver framework through a flange.

The invention has the beneficial effects that:

the electromagnetic driver is adopted to drive the handle to rotate, the handle is provided with the pull rod groove, and the pull rod required by transmission is placed in the pull rod handle, so that a conduction interface is reserved for other linkage parts of the circuit breaker. The invention has the effects of small occupied space, high switching-on speed, high stability and long service life, and reserves space for the circuit board.

Drawings

Fig. 1 is a schematic structural diagram of an electromagnetic closing drive mechanism according to the present invention.

Fig. 2 is a schematic structural diagram of an electromagnetic closing drive mechanism according to the present invention.

Fig. 3 is a schematic structural diagram of the electromagnetic actuator of the present invention.

Fig. 4 is a circuit schematic of the present invention.

Fig. 5 is a schematic diagram of a rectifier circuit of the present invention.

Fig. 6 is a schematic diagram of an isolated power supply circuit of the present invention.

Fig. 7 is a schematic diagram of an electromagnetic drive of the present invention.

Fig. 8 is a schematic structural view of the latch of the present invention.

In the figure: 1. a housing; 2. an electromagnetic drive; 3. a push rod; 4. a cam; 5. a rotating shaft; 6. a pull rod groove; 7. a handle; 8. a switch-on state identification sensor; 9. a brake-off state identification sensor; 10. a metal rod; 21. a housing fixing groove; 22. a driver metal bracket; 23. a driver skeleton.

Detailed Description

As shown in fig. 1 and 2, the present invention provides an electromagnetic closing driving mechanism, which includes an electromagnetic driver 2, a handle 7, a closing state recognition sensor 8 and an opening state recognition sensor 9, wherein the electromagnetic driver 2 is provided with a push rod 3, the handle 7 is provided with a cam 4, and the push rod 3 is arranged right below the cam 4. The closing state recognition sensor 8 is arranged on the cam 4, and the opening state recognition sensor 9 is arranged on the handle 7 between the cam 4 and the pull rod groove 6. The handle 7 is provided with a pull rod groove 6, a U-shaped pull rod is arranged in the pull rod groove 6 in a penetrating mode, one end of the U-shaped pull rod is arranged on the main shaft, the main shaft is connected with the rotating shaft 5, a metal rod 10 is arranged on the moving contact flow guide piece in a penetrating mode, the moving contact is fixed on the moving contact flow guide piece, the moving contact flow guide piece is arranged on the rotating shaft, and one end of the metal rod 10 is fixed on the shell 1 of the circuit breaker.

As shown in fig. 3, the electromagnetic driver 2 includes a push rod 3, a driver frame 23, and a driver metal bracket 22, wherein the push rod 3 is disposed on the driver frame 23, and the driver frame 23 is disposed in the housing fixing groove 21 via the driver metal bracket 22. The push rod 21 is connected with the driver framework 23 by a flange.

A flange is designed at one end of the push rod 3, a cam 4 is designed on the handle 7, the electromagnetic driver 2 drives the push rod 3 to push the cam 4, so that the handle 7 drives other components of the circuit breaker to enable the handle to be in a switching-on position through the pull rod groove 6, the circuit breaker is in a switching-on state synchronously, and a power supply of the electromagnetic driver is from a main loop power supply. The handle 7 can toggle the switch up and down after the switch-on is finished, and the push rod 3 is in a free moving state at the moment. After the electric appliance driver drives the switch-on, the handle 7 and the cam 4 detect the switch-on state of the position synchronization server through the switch-on state identification sensor 8.

In one embodiment, after the switching-on and switching-off are manually driven by the handle 7, the switching-on state identification sensor 8 and the switching-off state identification sensor 9 are used for identifying the switching state of the position synchronization server.

As shown in fig. 4, the isolation driving unit includes a rectifying circuit and an isolation power supply circuit. As shown in fig. 5 to 7, the rectification circuit is divided into single-phase power supply rectification and three-phase power supply rectification. And the alternating current is rectified into direct current through a rectifier bridge to supply power for a control panel MCU of the control system. And L _ A/L _ B/L _ C are ABC three-phase power respectively, and L _ IN and N _ IN are a live wire and a zero wire of single-phase power supply respectively. In order to improve the anti-interference performance, ensure the reliability, enable the strong current driving action to be fast and powerful and isolate the strong current from a control circuit. The control circuit required by the 12V direct current and the control panel through strong current conversion is realized by an isolated power supply; wherein, L1 and C1 form an LC filter circuit to isolate the ripple in the circuit.

The driving signal of the electromagnetic driver comes from the MCU, and the PWM modulation control signal is used (because the PWM control has strong resistance to noise, the harmonic is suppressed by the frequency and voltage conversion, and the stability of the circuit breaker when closing is enhanced), the control signal controls the conduction of the MOS transistor Q1 through the optical coupling isolation chip TLP152, so as to control the electromagnetic driver to operate.

The rotating shaft is provided with a torsion spring and a lock catch, and the main shaft is connected with the rotating shaft through a moving contact flow guide piece. The contact mechanism is arranged in the shell and comprises a moving contact and a static contact, the moving contact is arranged on the moving contact flow guide piece, the moving contact flow guide piece is arranged on the rotating shaft, and the static contact is arranged on the static contact flow guide piece; and an electric heating release is arranged on one side of the lock catch, which is far away from the main shaft, and the electric heating release is arranged on the static contact flow guide piece.

As shown in fig. 8, the shackle includes a first shackle 701, a second shackle 702, and a third shackle 703, with the second shackle 702 being disposed between the first shackle 701 and the third shackle 703. The first lock body 701 and the second lock body 702 are in a V shape or a U shape, and the second lock body 702 and the third lock body 703 are in a V shape or a U shape.

In this embodiment, the electrothermal release is disposed between the second lock 702 and the third lock 703, and contacts with one side of the second lock 702. The electromagnetic trip assembly is disposed on one side of the third lock body 703. And the static contact flow guide member is connected with the electromagnetic drive tripping assembly in a spot welding manner. The static contact is connected with the static contact flow guide element in a spot welding mode, and the moving contact is connected with the moving contact flow guide element in a spot welding mode. The moving contact flow guide element is connected with the rotating shaft. The moving contact flow guide element is connected with the outlet end flow guide copper sheet by a lead. The moving contact is in contact conduction with the fixed contact when in a closing state. The outlet terminal guide copper sheet is connected with the outlet terminal assembly by a lead. The moving contact and the moving contact diversion piece are pushed by the handle to transmit force and angle through the pull rod to enable the transmission mechanism assembly to take effect, and the transmission mechanism assembly drives the moving contact and the moving contact diversion piece to be close to the static contact through the rotating shaft until the moving contact and the moving contact diversion piece are contacted.

The invention forms the overall arrangement through the embedded slot position of the shell 1 and the rotating shaft, connects and links all the components, achieves the effect of automatically driving the breaker to close, has the effects of small occupied space, high closing speed, high stability and long service life, and reserves the space for the circuit board.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides an electromagnetism closing drive mechanism which characterized in that: the electromagnetic switching-on device comprises a shell, wherein an electromagnetic switching-on driving mechanism is arranged in the shell and comprises an electromagnetic driver (2), a switching-on state identification sensor (8) and a switching-off state identification sensor (9), the electromagnetic driver (2) is provided with a push rod (3), a cam (4) is arranged on a handle (7), and the push rod (3) is arranged below the cam (4); the switching-on state recognition sensor (8) is arranged on the cam (4), and the switching-off state recognition sensor (9) is arranged on the handle (7); the handle (7) is provided with a pull rod groove (6), a U-shaped pull rod penetrates through the pull rod groove (6), one end of the U-shaped pull rod is arranged on the main shaft, and the main shaft is connected with the rotating shaft (5).

2. The electromagnetic closing drive mechanism according to claim 1, characterized in that: the brake-separating state recognition sensor (9) is arranged on the handle (7) between the cam (4) and the pull rod groove (6).

3. The electromagnetic closing drive mechanism according to claim 1, characterized in that: electromagnetic drive ware (2) include driver skeleton (23), driver metal support (22) and push rod (21), push rod (21) set up on driver skeleton (23), driver skeleton (23) set up in shell fixed slot (24) through driver metal support (22).

4. The electromagnetic closing drive mechanism according to claim 1, characterized in that: the push rod (3) is positioned right below the cam (4).

5. The electromagnetic closing drive mechanism according to claim 1, characterized in that: the push rod (21) is connected with the driver framework (23) through a flange.