Opening and closing mechanism of isolating switch

Abstract

The utility model relates to the field of low-voltage electric appliances, and particularly discloses an opening and closing mechanism of an isolating switch, which comprises a switch seat body and a control shaft arranged in the switch seat body in a penetrating manner, and one end of the control shaft is provided with an operating mechanism used for driving the control shaft to rotate. The operating mechanism comprises a driving motor fixedly connected with the control shaft, a circuit board used for controlling starting and stopping of the driving motor, a microswitch electrically connected with the circuit board and a fixing plate used for installation of the microswitch, and an output shaft of the driving motor penetrates through the fixing plate. The end, close to the driving motor, of the control shaft is fixedly connected with a control piece used for pressing the microswitch. The opening and closing mechanism of the isolating switch has the effects of facilitating opening and closing operation and improving safety.

Description

Technical Field

[0001] This application relates to the field of low-voltage electrical equipment, and in particular to a switching mechanism for a disconnecting switch. Background Technology

[0002] Disconnecting switches are mainly used to reliably isolate the parts of a power distribution system that need to be de-energized from the energized parts, so as to ensure the safety of maintenance work.

[0003] Chinese patent CN206451644U discloses a switching mechanism for a disconnector, comprising a housing, a sliding button and a rotating shaft on the housing, an insulating turntable fitted on the rotating shaft, an arc-shaped groove on the circumference of the turntable, a conductive contact piece embedded in the bottom of the arc-shaped groove, a contact steel ball corresponding to the arc-shaped groove, the contact steel ball being disposed at the end of a transmission rod, two parallel convex plates respectively on the upper and lower sides of the housing corresponding to the insulating turntable, two symmetrical balance bars respectively connected to the upper and lower sides of the contact steel ball, the ends of the balance bars contacting the convex plates, a connecting baffle is provided between the two convex plates, the connecting baffle is provided with a guide hole for the transmission rod to pass through, a compression spring is provided between the connecting baffle and the balance bars, and the sliding button drives the insulating turntable to rotate through a transmission device.

[0004] The aforementioned disconnecting switch is controlled by a sliding button to open and close the circuit, which can effectively reduce the occurrence of misoperation. However, it still requires the operator to directly contact the disconnecting switch on site to perform the opening and closing operations, so there is still room for improvement. Utility Model Content

[0005] To facilitate opening and closing of the circuit breaker, this application provides an opening and closing mechanism for a disconnecting switch.

[0006] The opening and closing mechanism of the disconnecting switch provided in this application adopts the following technical solution:

[0007] A disconnecting switch opening and closing mechanism includes a switch base and a control shaft passing through the switch base. One end of the control shaft is provided with an operating mechanism for driving the control shaft to rotate. The operating mechanism includes a drive motor fixedly connected to the control shaft, a circuit board for controlling the start and stop of the drive motor, a micro switch electrically connected to the circuit board, and a fixing plate for mounting the micro switch. The output shaft of the drive motor passes through the fixing plate. A control component for pressing the micro switch is fixedly connected to the end of the control shaft near the drive motor.

[0008] By adopting the above technical solution, the efficiency of opening and closing the circuit is improved by using a motor to drive the control shaft to rotate. A micro switch is installed on the fixed plate to sense the position or movement state of the motor output shaft. The control component presses the micro switch to transmit a signal to the circuit board, so that the circuit board can control the output shaft of the motor to rotate according to the signal. The circuit board can also be remotely controlled by the operator to realize the automated operation of opening and closing the circuit, reduce human error, and improve the accuracy of operation.

[0009] Optionally, at least two microswitches are arranged circumferentially around the control element, with the button of the microswitch facing towards the side closer to the control element.

[0010] By adopting the above technical solution, the motor drives the control shaft to rotate to realize the opening and closing operation. Two microswitches detect the position when the circuit is opened and closed, thereby ensuring that the control shaft can receive effective feedback when it rotates, so that the motor can more accurately control the rotation angle of the control shaft.

[0011] Optionally, the outer wall of the control element is provided with at least one protrusion for pressing the micro switch.

[0012] By adopting the above technical solution, it is ensured that when the motor drives the control shaft to rotate, the control components can stably trigger the micro switch, thereby ensuring that the rotation of the control shaft can be effectively detected and fed back, and ensuring the reliability of operation.

[0013] Optionally, a positioning seat is connected to the side of the switch base near the drive motor, a positioning ring is fixedly connected to the control shaft, and the positioning seat has a groove for placing the positioning ring.

[0014] By adopting the above technical solution, the positioning ring and the groove cooperate to achieve accurate positioning and alignment. When the control shaft rotates, the positioning ring rotates in the groove, thereby preventing the control shaft from being displaced along its length and improving the stability and safety of use.

[0015] Optionally, two positioning seats are provided and located on both sides of the control shaft, and the groove is formed on the opposite side of the two positioning seats.

[0016] By adopting the above technical solution, when the positioning ring plays a positioning role, the positioning seats are set on both sides of the control shaft to ensure that the positioning ring is subjected to uniform force, thereby preventing the positioning ring from being deformed or even damaged due to unilateral force, and ensuring the stability and reliability of the system.

[0017] Optionally, a limiting rod is connected to the inner wall of the groove, and an abutment rod is connected to the outer periphery of the positioning ring, the abutment rod being used to abut against the limiting rod.

[0018] By adopting the above technical solution, when the control shaft rotates to the closing position during the opening and closing operation, the abutment rod will abut against the limit rod, thereby preventing the control shaft from rotating too much and causing unstable circuit connection or even short circuit. In the event of failure of the micro-motion mechanism, the abutment rod and the limit rod work together as a second layer of protection to effectively limit the position, thereby ensuring the safety of the opening and closing operation.

[0019] Optionally, the operating mechanism is covered with a protective shell.

[0020] By adopting the above technical solution, the protective shell provides external physical protection for the operating mechanism, preventing damage from the external environment such as dust, impact, and moisture, and effectively preventing rust from the internal components. Furthermore, the protective shell enhances the aesthetics and durability of the operating mechanism, effectively improving its service life and safety.

[0021] Optionally, an indicator light connected to a circuit board is provided on the top of the protective shell.

[0022] By adopting the above technical solution, the indicator light can change to different states when the circuit's operating state changes, thus intuitively showing the operating status of the disconnect switch, enabling users to perform corresponding operations based on the current state of the disconnect switch and improving interactivity.

[0023] In summary, this application has the following beneficial effects:

[0024] 1. By setting up an operating mechanism, the opening and closing of the disconnecting switch can be effectively automated, and it is convenient for operators to remotely control the switch, reducing human error and improving the accuracy of operation.

[0025] 2. By setting a limit rod and a stop rod, when the micro switch fails, the control shaft rotates and the stop rod contacts the limit rod, thereby effectively limiting the rotation angle of the control shaft and ensuring the safety of the opening and closing operation. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the disconnecting switch according to an embodiment of this application;

[0027] Figure 2 This is a schematic diagram of the structure of the operating mechanism according to an embodiment of this application;

[0028] Figure 3 This is a cross-sectional view of the operating mechanism according to an embodiment of this application;

[0029] Figure 4 This is a cross-sectional view of the positioning ring and the fixing seat according to an embodiment of this application.

[0030] Explanation of reference numerals in the attached drawings: 1. Switch base; 11. Positioning seat; 111. Groove; 112. Limiting rod; 2. Control shaft; 21. Control component; 211. Protrusion; 22. Positioning ring; 221. Abutment rod; 3. Operating mechanism; 31. Drive motor; 32. Circuit board; 33. Micro switch; 34. Fixing plate; 4. Protective shell; 41. Indicator light. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0032] This application discloses a closing and opening mechanism for a disconnecting switch. (Refer to...) Figure 1 The opening and closing mechanism of the disconnecting switch includes a switch base 1 and a control shaft 2 passing through the switch base 1. The opening and closing operation of the disconnecting switch is realized by rotating the control shaft 2.

[0033] Reference Figure 2 , Figure 3 One end of the control shaft is provided with an operating mechanism 3 for driving the control shaft 2 to rotate. The operating mechanism 3 includes a drive motor 31 fixedly connected to the control shaft 2, a circuit board 32 for controlling the start and stop of the drive motor 31, a micro switch 33 electrically connected to the circuit board 32, and a fixing plate 34 for mounting and fixing the micro switch 33. The output shaft of the drive motor 31 passes through the fixing plate 34. The body of the drive motor 31 is fixedly connected to the fixing plate 34. A control component 21 for pressing the micro switch 33 is fixedly connected to the end of the control shaft 2 near the drive motor 31.

[0034] When performing opening and closing operations, the circuit board 32 receives a signal, causing the drive motor 31 to drive the control shaft 2 to rotate. When the control shaft 2 rotates to the closing position, the control component 21 presses the micro switch 33. The micro switch 33 transmits an electrical signal to the circuit board, causing the drive motor 31 to stop running, thereby realizing the automated operation of opening and closing, effectively reducing human error and improving the accuracy of operation.

[0035] Reference Figure 2 , Figure 3At least two microswitches 33 are arranged circumferentially around the control element 21, with the button of the microswitch 33 facing towards the side closer to the control element 21. When only one microswitch 33 is used, there is only one control signal. When the circuit breaker is opened, the control shaft 2 will stop rotating as soon as the control element 21 leaves the microswitch 33. At this time, the contacts inside the isolating switch may not be completely separated, which poses a certain safety hazard. In this embodiment, there are two microswitches 33; in other embodiments, there may be three, four or more microswitches 33. In contrast, two microswitches 33 respectively correspond to the opening and closing positions and perform detection, thereby ensuring that the control shaft 2 can achieve effective position detection whether the circuit breaker is open or closed, so that the motor can drive the control shaft 2 to rotate more accurately and ensure the reliability of operation.

[0036] Reference Figure 2 , Figure 3 The outer periphery of the control component 21 is provided with a protrusion 211 for pressing the micro switch 33. During the opening and closing operation, the control component 21 rotates with the control shaft 2, thereby driving the protrusion 211 to rotate. The protrusion 211 ensures that the control component 21 can stably trigger the micro switch 33, thereby ensuring that the rotation state of the control shaft 2 can be effectively detected and fed back, and ensuring the reliability of the operation.

[0037] Reference Figure 2 , Figure 4 A positioning seat 11 is fixedly connected to the side of the switch base 1 near the drive motor 31. Two positioning seats are provided, located on either side of the control shaft 2. A positioning ring 22 is fixedly connected to the control shaft 2 circumferentially. The two positioning seats 11 have grooves 111 on opposite sides for the positioning rings 22 to be placed. The grooves 111 within the positioning seats 11 cooperate with the positioning rings 22 to achieve accurate positioning of the control shaft 2. When the control shaft 2 rotates, the inner wall of the positioning ring 22 contacts the inner wall of the groove 111, preventing large displacement of the control shaft 2 along its length that could hinder the closing operation and improving stability and safety. Simultaneously, the positioning seats 11, positioned on both sides of the control shaft 2, ensure that the positioning rings 22 are evenly stressed, preventing deformation or damage due to unilateral stress and ensuring system stability and reliability.

[0038] Reference Figure 2 , Figure 4A limit rod 112 is connected to the inner wall of the groove 111, and an abutment rod 221 for abutting against the limit rod 112 is connected to the outer wall of the positioning ring 22. During the rotation of the control shaft 2, when the micro switch 33 fails, the abutment rod 221 and the limit rod 112 cooperate to limit the rotation, thereby preventing the control shaft 2 from continuing to rotate and preventing the circuit connection from becoming unstable or even short-circuiting due to excessive rotation of the control shaft 2. In this process, the abutment rod 221 and the limit rod 112 act as a second safety measure to effectively limit the rotation angle of the control shaft 2 and ensure the safety of the opening and closing operation.

[0039] Reference Figure 1 The operating mechanism 3 is covered by a protective shell 4, and an indicator light 41 connected to the circuit board is installed on the top of the protective shell 4. The protective shell 4 effectively isolates the operating mechanism 3 from the external environment, thereby preventing dust, moisture, etc. from affecting the internal components of the operating mechanism 3, effectively preventing the internal components of the operating mechanism 3 from rusting, and effectively improving the service life and safety of the components. The indicator light 41 can intuitively show the operating status of the disconnect switch, thereby facilitating the operator to perform corresponding operations and improving interactivity.

[0040] The implementation principle of the opening and closing mechanism of the disconnecting switch in this application embodiment is as follows: When performing the opening and closing operation, the circuit board sends a signal, and the drive motor 31 drives the control shaft 2 to rotate. When the control shaft 2 rotates to the opening and closing position, the protrusion 211 on the control component 21 presses the micro switch 33. At this time, the circuit board receives the signal from the micro switch 33, causing the drive motor 31 to stop rotating, thus completing the opening and closing operation. This effectively realizes automation, reduces human error, and improves the accuracy of operation.

[0041] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A switching mechanism for a disconnecting switch, comprising a switch base (1) and a control shaft (2) passing through the switch base (1), characterized in that: One end of the control shaft (2) is provided with an operating mechanism (3) for driving the control shaft (2) to rotate. The operating mechanism (3) includes a drive motor (31) fixedly connected to the control shaft (2), a circuit board (32) for controlling the start and stop of the drive motor (31), a micro switch (33) electrically connected to the circuit board (32), and a fixing plate (34) for mounting the micro switch (33). The output shaft of the drive motor (31) passes through the fixing plate (34). The control shaft (2) near the drive motor (31) is fixedly connected with a control component (21) for pressing the micro switch (33).

2. The opening and closing mechanism of the disconnecting switch according to claim 1, characterized in that: At least two microswitches (33) are arranged circumferentially around the control member (21), and the buttons of the microswitches (33) face the side closer to the control member (21).

3. The opening and closing mechanism of the disconnecting switch according to claim 1, characterized in that: The outer wall of the control element (21) is provided with at least one protrusion (211) for pressing the micro switch (33).

4. The opening and closing mechanism of the disconnecting switch according to claim 1, characterized in that: The switch base (1) is connected to a positioning seat (11) on the side near the drive motor (31), and the control shaft (2) is fixedly connected to a positioning ring (22). The positioning seat (11) has a groove (111) for the positioning ring (22) to be placed.

5. The opening and closing mechanism of the disconnecting switch according to claim 4, characterized in that: There are two positioning seats (11) located on both sides of the control shaft (2), and the groove (111) is opened on the opposite side of the two positioning seats (11).

6. The opening and closing mechanism of the disconnecting switch according to claim 5, characterized in that: The inner wall of the groove (111) is connected to a limiting rod (112), and the outer periphery of the positioning ring (22) is connected to an abutting rod (221), which is used to abut against the limiting rod (112).

7. The opening and closing mechanism of the disconnecting switch according to claim 1, characterized in that: The operating mechanism (3) is covered with a protective shell (4).

8. The opening and closing mechanism of the disconnecting switch according to claim 7, characterized in that: The top of the protective shell (4) is provided with an indicator light (41) that is connected to the circuit board.

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