Electric operating mechanism of isolating switch

Abstract

The utility model discloses an electric operating mechanism of an isolating switch, which comprises a mounting rack, one side of an inner cavity of the mounting rack is rotatably connected with a main shaft through a bearing, the other side of the inner cavity of the mounting rack is fixedly provided with a double-shaft motor, and the end parts of a group of output shafts of the double-shaft motor are fixedly provided with motor shafts; according to the utility model, the motor shaft is driven to rotate through the double-shaft motor, then the motor shaft drives the main shaft through the occlusion cylinder, and then the operating shaft is driven through the worm and the worm gear, so that the disconnecting switch is electrically switched on and switched off, and then the adjusting assembly is operated through the shifting fork rod and the operating rod. According to the invention, the motor shaft and the main shaft are disconnected, the energy storage and the energy release of the clockwork spring are matched, the operation shaft is manually and indirectly driven, the driving mode is changed, the small torque is adopted, the disconnecting switch is automatically turned on, when electric driving fails, manual operation can be adopted, time and labor are saved, and the disconnecting timeliness of the disconnecting switch is improved.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, specifically to an electric operating mechanism for a disconnecting switch. Background Technology

[0002] A disconnecting switch, generally referring to a high-voltage disconnecting switch, primarily functions to ensure the safety of high-voltage electrical equipment and devices during maintenance, acting as a voltage isolator. The function of a disconnecting switch is to disconnect circuits without load current, providing a clear disconnection point between the equipment under maintenance and the power supply. Some disconnecting switches are located inside high-voltage electrical equipment. From a safety perspective, after the high-voltage equipment is de-energized, it is best to disconnect the disconnecting switch before opening the cabinet door. This necessitates an electrically operated disconnecting mechanism, while also retaining a manual disconnecting method. Therefore, an electric mechanism capable of both electric and manual operation is required to disconnect the disconnecting switch.

[0003] In the prior art, Chinese utility model publication number CN222801621U discloses an electric control mechanism for a disconnecting switch, including a mounting bracket, a transmission main shaft, a double-throw clutch mechanism, an electric mechanism, and a manual mechanism. The double-throw clutch mechanism includes a drive shaft and a driven shaft. The double-throw clutch mechanism, the electric mechanism, and the manual mechanism are all connected to or fixed to the mounting bracket. The transmission main shaft is located inside the double-throw clutch mechanism. The driven shaft of the double-throw clutch mechanism is connected to the transmission main shaft, the drive shaft of the double-throw clutch mechanism is connected to the electric mechanism, and the manual mechanism is connected to the driven shaft. During electric drive, the drive shaft and the driven shaft are connected, and the electric mechanism drives the double-throw clutch mechanism to rotate, thereby rotating the transmission main shaft. During manual drive, the drive shaft and the driven shaft are separated, and the manual mechanism drives the driven shaft to rotate, thereby rotating the transmission main shaft. This mechanism can both electrically control the opening and closing of the disconnecting switch and manually operate it, improving the practicality and safety of the disconnecting switch and making high-voltage electrical equipment safer and more reliable during operation or maintenance.

[0004] When using electric drive, the device will not work if the power supply to the drive component fails. When using manual drive, a large operating torque is required to drive the actuator. Manual operation is not only laborious but also inefficient. In case of an emergency requiring the disconnect switch to be disconnected quickly, the speed of manual operation may delay the operation. Utility Model Content

[0005] The purpose of this utility model is to provide an electric operating mechanism for disconnecting switches. The mechanism uses a dual-axis motor to drive the motor shaft to rotate, and then the motor shaft drives the main shaft through a meshing cylinder. By utilizing a worm gear transmission structure and a spring energy storage design, the torque required for manual operation is reduced, the burden on the operator is lessened, and the portability of manual operation is improved, thereby solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an electric operating mechanism for a disconnecting switch, comprising:

[0007] Mounting rack;

[0008] One side of the inner cavity of the mounting frame is rotatably connected to a main shaft via a bearing, and a dual-axis motor is fixed to the other side of the inner cavity of the mounting frame. A motor shaft is fixed to the end of one set of output shafts of the dual-axis motor. Engaging sleeves are engaged at the opposite ends of the motor shaft and the main shaft. An operating shaft for driving the isolation switch to open or close is also rotatably connected to the mounting frame via a bearing. A worm gear is fixed on the operating shaft, and one end of the main shaft passes through the mounting frame and is fixed with a worm that meshes with the worm gear.

[0009] An adjustment assembly is provided on the outer side of the main shaft and the motor shaft, and a shift fork is hinged to the outer side of the mounting bracket. The shift fork is used to manually control the adjustment assembly via an operating lever.

[0010] Preferably, the outer side of the opposite end of the main shaft and the motor shaft is provided with a meshing groove, and the inner cavity of the meshing cylinder is fixed with a limiting strip that is slidably disposed in the meshing groove.

[0011] Preferably, the adjustment assembly includes a slide plate sleeved on the outside of the motor shaft, and a buffer spring and a compression spring sleeved on the outside of the motor shaft are respectively fixed on both sides of the slide plate. The end of the compression spring away from the slide plate is fixedly connected to the dual-axis motor, and the buffer spring is located between the engagement cylinder and the slide plate.

[0012] Preferably, the inner cavity of the mounting bracket is further provided with a reverse drive assembly for automatically resetting the spindle. The reverse drive assembly includes a spring box fixedly sleeved on the outside of the spindle. The spring box is fixed on the inner wall of the mounting bracket. A spring spring is fixed on the inner wall of the spring box. The movable end of the spring spring is fixedly connected to the outer wall of the spindle.

[0013] Preferably, the operating lever is fixed to one side of the slide plate, one end of the operating lever extends to the outside of the mounting bracket, and one end of the shift fork is sleeved on the outside of the operating lever.

[0014] Preferably, an outer sleeve is fitted around the outer side of the bite cylinder, and the end of the buffer spring away from the slide plate is fixedly connected to one end of the outer sleeve.

[0015] Preferably, the other set of output shafts of the dual-axis motor extends to the outside of the mounting frame, and a limit groove is provided on the mounting frame, with the operating lever slidably disposed within the limit groove.

[0016] Preferably, the length of the engagement groove on the main shaft is less than the length of the engagement cylinder, and the length of the engagement groove on the motor shaft is greater than the length of the engagement cylinder.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. This utility model uses a dual-axis motor to drive the motor shaft to rotate. The motor shaft then drives the main shaft through a meshing cylinder, and further drives the operating shaft through a worm gear and worm wheel. This enables the electric opening and closing of the disconnecting switch. The adjustment component is then operated via a shift fork and an operating lever to disconnect the motor shaft from the main shaft. With the energy storage and release of the spring, the operating shaft can be driven manually and indirectly. By changing the driving method and using a smaller torque, the disconnecting switch can be opened automatically. In case of electric drive failure, manual operation can be used, saving time and effort and improving the timeliness of disconnecting the disconnecting switch.

[0019] 2. This utility model uses a dual-axis motor with two sets of output shafts on both sides. When the dual-axis motor fails to operate, the output shafts can be manually rotated to drive the operating shaft and close the isolating switch. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a top-view three-dimensional structural diagram of the present invention;

[0022] Figure 3 This is a bottom-view three-dimensional structural diagram of the present invention;

[0023] Figure 4 This is a rear-view three-dimensional structural diagram of the present invention;

[0024] Figure 5 This is a cross-sectional structural diagram of the present invention.

[0025] The following are the labeling elements in the diagram: 1. Mounting bracket; 2. Main spindle; 3. Dual-axis motor; 4. Motor shaft; 5. Engaging cylinder; 6. Operating shaft; 7. Worm gear; 8. Worm; 9. Adjustment assembly; 91. Slide plate; 92. Buffer spring; 93. Compression spring; 10. Shift fork lever; 11. Engaging groove; 12. Limit bar; 13. Spring barrel; 14. Spring spring; 15. Outer sleeve; 16. Limit groove; 17. Operating lever. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] like Figures 1-5 As shown, this utility model provides an electric operating mechanism for a disconnecting switch, including a mounting frame 1. A main shaft 2 is rotatably connected to one side of the inner cavity of the mounting frame 1 via a bearing. A dual-axis motor 3 is fixed to the other side of the inner cavity of the mounting frame 1. A motor shaft 4 is fixed to one end of a set of output shafts of the dual-axis motor 3. Engaging sleeves 5 are engaged at the opposite ends of the motor shaft 4 and the main shaft 2. An operating shaft 6 for driving the disconnecting switch to open or close is also rotatably connected to the mounting frame 1 via a bearing. A worm gear 7 is fixed to the operating shaft 6. One end of the main shaft 2 passes through the mounting frame 1 and is fixed with a worm 8 that meshes with the worm gear 7.

[0028] An adjustment assembly 9 is provided on the outer side of the main spindle 2 and the motor shaft 4. A shift fork 10 is hinged to the outer side of the mounting bracket 1. The shift fork 10 is manually operated to adjust the adjustment assembly 9 via the operating lever 17.

[0029] The motor shaft 4 is driven to rotate by the dual-axis motor 3. The motor shaft 4 then drives the main shaft 2 through the engagement cylinder 5, and then drives the operating shaft 6 through the worm gear 8 and worm wheel 7, thereby realizing the electric opening and closing of the disconnecting switch. Then, the adjustment component 9 is operated through the shift fork 10 and the operating lever 17 to realize the disconnection between the motor shaft 4 and the main shaft 2. With the energy storage and release of the spring 14, the operating shaft 6 is driven manually and indirectly. By changing the driving mode and using a smaller torque, the disconnecting switch is opened automatically. In the event of an electric drive failure, manual operation can be used, which saves time and effort and improves the timeliness of disconnecting the disconnecting switch.

[0030] like Figure 3 and Figure 5 As shown, a meshing groove 11 is provided on the outer side of the opposite end of the main shaft 2 and the motor shaft 4. A limiting strip 12 is fixedly provided in the inner cavity of the meshing cylinder 5 and is slidably disposed in the meshing groove 11. The limiting strip 12 slides in the meshing groove 11. When the meshing cylinder 5 is used to connect the motor shaft 4 and the main shaft 2, the synchronous drive of the motor shaft 4 and the main shaft 2 is realized. At the same time, the meshing cylinder 5 moves along the axial direction of the main shaft 2 under the cooperation of the limiting strip 12 and the meshing groove 11.

[0031] like Figure 1 , Figure 2 , Figure 4 and Figure 5As shown, the adjustment assembly 9 includes a slide plate 91 sleeved on the outside of the motor shaft 4. A buffer spring 92 and a compression spring 93 sleeved on the outside of the motor shaft 4 are respectively fixed on both sides of the slide plate 91. The end of the compression spring 93 away from the slide plate 91 is fixedly connected to the dual-axis motor 3. The buffer spring 92 is located between the biting cylinder 5 and the slide plate 91. The slide plate 91 is limited by the cooperation of the buffer spring 92 and the compression spring 93. When the position of the slide plate 91 is manually intervened, the position of the biting cylinder 5 is adjusted by the elastic deformation of the buffer spring 92 and the compression spring 93.

[0032] like Figure 3 As shown, the inner cavity of the mounting bracket 1 is also equipped with a reverse drive assembly for automatically resetting the spindle 2. The reverse drive assembly includes a spring box 13 fixedly sleeved on the outside of the spindle 2. The spring box 13 is fixed on the inner wall of the mounting bracket 1. A spring spring 14 is fixed on the inner wall of the spring box 13. The movable end of the spring spring 14 is fixedly connected to the outer wall of the spindle 2. When the dual-axis motor 3 drives the spindle 2 to rotate and closes the isolating switch, the spring spring 14 winds up and stores energy. When the motor shaft 4 is disconnected from the spindle 2, the spring spring 14 releases energy and expands outward. At this time, the spring spring 14 drives the spindle 2 to rotate in the opposite direction. Then, the worm gear 8 and worm wheel 7 reverse the operation of the operating shaft 6 to open the isolating switch.

[0033] like Figure 1 As shown, the operating lever 17 is fixed to one side of the slide plate 91, and one end of the operating lever 17 extends to the outside of the mounting bracket 1. One end of the shift fork 10 is sleeved on the outside of the operating lever 17. By connecting the operating lever 17 to the slide plate 91, the position of the slide plate 91 is adjusted by the shift fork 10, and the position of the engagement cylinder 5 is adjusted by the buffer spring 92 and the compression spring 93, so as to realize the manual disconnection operation between the motor shaft 4 and the main shaft 2.

[0034] like Figure 5 As shown, an outer sleeve 15 is fitted on the outer side of the bite cylinder 5. The end of the buffer spring 92 away from the slide plate 91 is fixedly connected to one end of the outer sleeve 15. The outer sleeve 15 is connected to the buffer spring 92. The outer sleeve 15 is rotated and clamped to the outside of the bite cylinder 5. When the bite cylinder 5 rotates with the motor shaft 4 and the main shaft 2, it will not affect the shape change of the compression spring 93, thus avoiding the buffer spring 92 from being directly connected to the bite cylinder 5 and causing the buffer spring 92 to twist.

[0035] like Figure 1-5As shown, the other set of output shafts of the dual-axis motor 3 extends to the outside of the mounting bracket 1. A limit groove 16 is provided on the mounting bracket 1, and the operating rod 17 is slidably set in the limit groove 16. With the dual-axis motor 3 set up, and the two sets of output shafts located on both sides, when the dual-axis motor 3 fails to operate, the output shaft can be manually rotated, and then the operating shaft 6 can be driven to close the isolating switch.

[0036] like Figure 5 As shown, the length of the engagement groove 11 on the main shaft 2 is less than the length of the engagement cylinder 5, and the length of the engagement groove 11 on the motor shaft 4 is greater than the length of the engagement cylinder 5. By limiting the length of the engagement groove 11 on the main shaft 2 and the motor shaft 4, when the buffer spring 92 and the compression spring 93 push the engagement cylinder 5 towards the main shaft 2, the engagement cylinder 5 can be connected to the motor shaft 4 and the main shaft 2 through the limiting strip 12. When the slide plate 91 moves to the right, driving the buffer spring 92 and the engagement cylinder 5 to move towards the motor shaft 4, the engagement cylinder 5 slides completely onto the motor shaft 4, realizing the separation of the motor shaft 4 and the main shaft 2. It is impossible to drive the main shaft 2 through the motor shaft 4, avoiding the motor shaft 4 from locking due to the failure of the dual-shaft motor 3, which would affect the reverse drive of the main shaft 2 by the spring spring 14.

[0037] The beneficial effects that can be achieved through the above technical solution include:

[0038] Dual drive mode:

[0039] It supports both electric and manual operation modes, solving the problems of inability to operate during power failure or large torque and slow speed during manual operation in existing technologies, ensuring that the opening and closing of the disconnect switch can still be completed quickly and reliably in emergency situations.

[0040] Low-torque manual operation:

[0041] Through the worm gear 7 and worm 8 transmission structure (large reduction ratio) and the energy storage design of the spring 14, the torque required for manual operation is significantly reduced, the burden on operators is reduced, and the convenience of manual operation is improved.

[0042] Automatic reset and disengagement:

[0043] The mechanical structure of the shift fork lever 10, the sliding plate 91, the buffer spring 92, and the engagement cylinder 5 automatically resets after manual operation, ensuring that the engagement cylinder 5 re-engages with the main shaft 2 in electric mode, achieving seamless switching without manual intervention.

[0044] Power outage emergency function:

[0045] When the power supply to the dual-axis motor 3 fails, the motor output shaft can be manually rotated to indirectly drive the operating shaft 6 through the worm gear 7 and worm 8, maintaining the basic function of the disconnecting switch and ensuring the safe operation of the equipment.

[0046] Dynamic buffering and stability:

[0047] The combined design of the buffer spring 92 and the compression spring 93 effectively absorbs the impact force during operation, avoids damage to mechanical parts caused by overload or misoperation, and improves the smoothness of the mechanism's operation.

[0048] Compact structure and adaptability:

[0049] The nested design of the worm gear 7, worm 8 and meshing groove 11 optimizes the spatial layout and is suitable for internal installation of high-voltage electrical devices; at the same time, the linkage mechanism between the shift fork rod 10 and the slide plate 91 simplifies the operation process and adapts to various working conditions.

[0050] Enhanced security:

[0051] The self-locking characteristics of the worm gear 7 and worm 8 prevent reverse drive and avoid misoperation; the energy storage and release process of the spring 14 is controllable, reducing the safety risks caused by accidental power outages or operational errors.

[0052] In practical use, when the electric operation is performed, the dual-axis motor 3 drives the motor shaft 4 to rotate. The rotation of the motor shaft 4, under the biting action of the biting cylinder 5, drives the main shaft 2 to rotate. The rotation of the main shaft 2 drives the worm 8 to rotate. The rotation of the worm 8 drives the worm wheel 7 to rotate. The rotation of the worm wheel 7 drives the operating shaft 6 to rotate, and then drives the isolating switch to open or close through the rotation of the operating shaft 6.

[0053] When performing manual operation, the dual-axis motor 3 has already stored energy in the spring 14 when it rotates to close the isolating switch. When it is necessary to disconnect the isolating switch, the operating fork lever 10 rotates, and the upper end of the operating fork lever 10 rotates, causing the operating lever 17 to move to the right. The operating lever 17 moves to the right, causing the slide plate 91 to move to the right against the force of the compression spring 93, which in turn causes the buffer spring 92 to move to the right. The buffer spring 92 is stretched, causing the outer sleeve 15 to move to the right, and then causing the internally rotatable engagement cylinder 5 to move to the right, so that the engagement cylinder 5 and the main shaft 2 are separated. At this time, the main shaft 2 rotates under the action of the spring 14, which in turn causes the worm gear 8 to rotate. The rotation of the worm gear 8 causes the worm wheel 7 to rotate, which in turn causes the operating shaft 6 to rotate. The rotation of the operating shaft 6 performs the separation action of the isolating switch.

[0054] After the operation is completed, the shift fork lever 10 is released. At this time, the slide plate 91 is reset under the action of the compression spring 93, which in turn compresses the buffer spring 92. When the dual-axis motor 3 performs the closing action next time, the buffer spring 92 indirectly pushes the biting cylinder 5 into the biting groove 11 on the main shaft 2, thereby driving the main shaft 2. The rotation angle of the main shaft 2 and the operating shaft 6 is detected by the angle sensor installed on the operating shaft 6. When the power supply of the dual-axis motor 3 fails, if it is necessary to close the isolating switch, the output shaft of the dual-axis motor 3 can be manually turned, thereby indirectly driving the operating shaft 6 to work.

[0055] Under normal circumstances, the positions of the slide plate 91 and the biting cylinder 5 are relatively stable, and the biting cylinder 5 is located between the motor shaft 4 and the main shaft 2, realizing the synchronous drive of the motor shaft 4 to the main shaft 2.

[0056] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electric operating mechanism for a disconnecting switch, characterized in that, include: Mounting bracket (1); One side of the inner cavity of the mounting frame (1) is rotatably connected to the main shaft (2) via a bearing, and the other side of the inner cavity of the mounting frame (1) is fixed with a dual-axis motor (3). A set of output shafts of the dual-axis motor (3) is fixed with a motor shaft (4). The motor shaft (4) and the main shaft (2) are both meshed with a meshing cylinder (5). The mounting frame (1) is also rotatably connected with an operating shaft (6) that drives the isolation switch to open or close via a bearing. A worm gear (7) is fixed on the operating shaft (6). One end of the main shaft (2) passes through the mounting frame (1) and is fixed with a worm (8) that meshes with the worm gear (7). An adjustment assembly (9) is provided on the outside of the main shaft (2) and the motor shaft (4). A shift fork (10) is hinged to the outside of the mounting bracket (1). The shift fork (10) is manually operated by the operating rod (17) to adjust the adjustment assembly (9).

2. The electrically operated mechanism for a disconnecting switch according to claim 1, characterized in that: The main shaft (2) and the motor shaft (4) have a meshing groove (11) on the outer side of their opposite ends, and the inner cavity of the meshing cylinder (5) is fixed with a limiting strip (12) that is slidably disposed in the meshing groove (11).

3. The electrically operated mechanism for a disconnecting switch according to claim 1, characterized in that: The adjustment assembly (9) includes a slide plate (91) sleeved on the outside of the motor shaft (4). A buffer spring (92) and a compression spring (93) sleeved on the outside of the motor shaft (4) are respectively fixed on both sides of the slide plate (91). The end of the compression spring (93) away from the slide plate (91) is fixedly connected to the dual-axis motor (3). The buffer spring (92) is located between the engagement cylinder (5) and the slide plate (91).

4. The electrically operated mechanism for a disconnecting switch according to claim 1, characterized in that: The inner cavity of the mounting bracket (1) is also provided with a reverse drive assembly for automatically resetting the spindle (2). The reverse drive assembly includes a spring box (13) fixedly sleeved on the outside of the spindle (2). The spring box (13) is fixed on the inner wall of the mounting bracket (1). A spring spring (14) is fixed on the inner wall of the spring box (13). The movable end of the spring spring (14) is fixedly connected to the outer wall of the spindle (2).

5. The electrically operated mechanism for a disconnecting switch according to claim 1, characterized in that: The operating lever (17) is fixed to one side of the slide plate (91), one end of the operating lever (17) extends to the outside of the mounting bracket (1), and one end of the shift fork (10) is sleeved on the outside of the operating lever (17).

6. The electrically operated mechanism for a disconnecting switch according to claim 3, characterized in that: The outer sleeve (15) is fitted on the outside of the bite cylinder (5), and the end of the buffer spring (92) away from the slide plate (91) is fixedly connected to one end of the outer sleeve (15).

7. The electrically operated mechanism for a disconnecting switch according to claim 1, characterized in that: The other set of output shafts of the dual-axis motor (3) extends through to the outside of the mounting bracket (1). A limit groove (16) is provided on the mounting bracket (1), and the operating rod (17) is slidably disposed in the limit groove (16).

8. The electrically operated mechanism for a disconnecting switch according to claim 1, characterized in that: The length of the engagement groove (11) on the main shaft (2) is less than the length of the engagement cylinder (5), and the length of the engagement groove (11) on the motor shaft (4) is greater than the length of the engagement cylinder (5).

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