Switching drive mechanism for three power supply transfer switch

Abstract

The switching drive mechanism of the three power source switch includes: electromagnetic drive assembly, manual operation assembly and energy storage limiting assembly; the electromagnetic drive assembly is composed of switching drive shaft, six-hole sheet, stepped shaft, left and right mechanism shell, and left and right two sets of rotary hooks, iron core, electromagnetic coil and other parts; when one coil is energized, the moving iron core is attracted to drive the rotary hook to move and drive the stepped shaft to move, and each action makes the switching drive shaft rotate 60°; when the other coil is energized, the switching drive shaft can rotate 60° in the opposite direction; the manual operation assembly is composed of operation gear and driven gear, and when the operation gear is manually rotated, the driven gear can be rotated about 60°; the energy storage limiting assembly is composed of six-petal drive wheel, drive block and energy storage spring; the six-petal drive wheel, driven gear and switching drive shaft are sleeved together and can rotate synchronously; under the action of the drive block, the six-petal drive wheel can rotate 60° clockwise and counterclockwise step by step, thereby realizing three power source switching.

Description

Technical Field

[0001] The subject matter disclosed in this invention relates to devices belonging to electrical systems, and more specifically to three-power transfer switching devices. Background Technology

[0002] Multi-power automatic transfer switches need to selectively connect the load to the first, second, or third power supply based on the power quality status of the first, second, and third power supplies. In automatic mode, when the first power supply fails, the automatic transfer switch can automatically switch from the first power supply to the second or third power supply, ensuring the continuity and reliability of power supply. In case of line maintenance or failure of both power supplies, there should also be a position where the first, second, and third power supplies are simultaneously disconnected, i.e., the fully open position.

[0003] Existing transmission devices have complex structures and numerous components, resulting in a non-compact overall structure for dual-power transfer switches. Furthermore, their operational stability is poor, making them unsuitable for three-power transfer mechanisms. Summary of the Invention

[0004] This invention provides a switching mechanism for a three-power switching device that solves the above-mentioned problems.

[0005] The present invention is achieved through the following technical solution: the switching drive mechanism of the three power transfer switch plus the contact assembly of the three power transfer switch constitutes the execution switching part of the three power transfer switch.

[0006] The switching drive mechanism of the three power transfer switch includes an electromagnetic drive assembly, a manual operation assembly, an energy storage limit assembly, a left mechanism housing, a right mechanism housing, and a base for mounting the above components and parts.

[0007] The electromagnetic drive assembly includes: a left mechanism housing, a right mechanism housing, a six-hole plate, a stepped shaft, and a conversion drive shaft; one six-hole plate is fitted onto the conversion drive shaft, and six stepped shafts pass through the holes in the six-hole plate, and another six-hole plate is fitted onto it. These parts are fixed in the left and right mechanism housings; it also includes: a first rotary hook, a first magnetic yoke, a first cover plate, and a first coil. When the first coil is energized, the first iron core is attracted, driving the first rotary hook to move. The first rotary hook drives the stepped shaft and the six-hole plate to rotate by an angle, which in turn causes the conversion drive shaft to rotate by an angle, defined as clockwise; a return spring pulls the first rotary hook back to its original position.

[0008] The electromagnetic drive assembly also includes: a second rotary hook, a second magnetic yoke, a second cover plate, and a second coil. When the second coil is energized, the second iron core is attracted, which drives the second rotary hook to move. The second rotary hook drives the stepped shaft and the six-hole plate to rotate by an angle, which in turn causes the drive shaft to rotate by an angle. This rotation direction should be counterclockwise. The return spring pulls the second rotary hook back to its original position.

[0009] There is a guide groove on both sides of the first and second iron cores. This guide groove is not open. This guide groove is also used to limit the return of the first and second slewing hooks by the reset spring after their movement. The two cover plate protrusions in the middle of the second cover plate are the limiters.

[0010] The first iron core and the first slewing hook are connected by rivets, and the first slewing hook can rotate freely.

[0011] The manual operation component includes: an operating gear and a driven gear, which are installed in the left and right mechanism housings; the driven gear is fitted into the central hole of the conversion drive shaft, and the two move synchronously; the operating gear transmits torque to the driven gear under manual operation, causing the conversion drive wheel to rotate.

[0012] Energy storage limiting assembly, including a six-lobed drive wheel, drive block, and energy storage spring; The six-lobed drive wheel is integrated with the driven gear and the conversion drive shaft, and the six-lobed drive wheel is installed in the left mechanism housing and the right mechanism housing; The drive block is located in the track slots of the left and right mechanism housings, and the energy storage spring is placed inside the drive block.

[0013] In both the electromagnetic drive assembly and the manual operation assembly, the six-lobed drive wheel is driven to rotate when the drive shaft or driven gear is rotated.

[0014] In the energy storage limit assembly, when the six-lobed drive wheel rotates, the large tooth on top squeezes the drive block, and the drive block compresses the energy storage spring. After the large tooth and the drive block pass the highest point, the six-lobed drive wheel accelerates its rotation. Assuming that at this time the moving and stationary contacts of the three power supply changeover switch are in the open state, the changeover drive shaft completes a 60° rotation, which in turn drives the moving and stationary contacts of the three power supply changeover switch to close quickly.

[0015] In the energy storage limit assembly, when the six-lobed drive wheel rotates, the large tooth on top squeezes the drive block, and the drive block compresses the energy storage spring. After the large tooth and the drive block pass the highest point, the six-lobed drive wheel accelerates its rotation. Assuming that the moving and stationary contacts of the three-power transfer switch are closed at this time, the transfer drive shaft completes a 60° rotation, which in turn drives the moving and stationary contacts of the three-power transfer switch to open quickly. Attached Figure Description

[0016] Figure 1 Overall schematic diagram;

[0017] Figure 2 Schematic diagram of electromagnetic drive components;

[0018] Figure 3 : Schematic diagram of the first iron core being attracted;

[0019] Figure 4: Schematic diagram of the second iron core reset.

[0020] Figure 5 : Manual operation component diagram;

[0021] Figure 6 : Schematic diagram of the operation gear for switching the driven gear of the drive shaft.

[0022] Figure 7 Schematic diagram of energy storage limiting component.

[0023] Figure 8 : Schematic diagram of the operation of the energy storage limit component.

[0024] Figure 9 : Schematic diagram of the operation process of the energy storage limit component.

[0025] Figure 10 Schematic diagram of the track groove of the iron core.

[0026] Figure 11 Schematic diagram of iron core rotary hook cover plate.

[0027] List of Identifiers: 1. Three-Power Transfer Switch Contact Assembly; 2. Transfer Drive Shaft; 3. Six-Hole Plate; 4. First Magnetic Yoke; 5. First Coil; 6. First Cover Plate; 7. Base; 8. Six-Petal Drive Wheel; 9. Drive Block; 10. Energy Storage Spring; 11. Driven Gear; 12. Operating Gear; 13. Right Mechanism Housing; 14. Left Mechanism Housing; 15. Stepped Shaft; 16. First Rotating Hook; 17. First Iron Core; 18. Second Magnetic Yoke; 19. Second Coil; 20. Second Cover Plate; 21. Second Rotating Hook; 22. Second Iron Core; 23. Track Groove; 24. Rivet; 25. Return Spring; 26. Cover Plate Boss; 27. Iron Core Guide Groove. Detailed Implementation

[0028] like Figure 1 As shown: The switching drive mechanism of the three power transfer switch includes an electromagnetic drive assembly, a manual operation assembly, an energy storage limit assembly, a left mechanism housing 13, a right mechanism housing 14, a base 7 for mounting the above components and parts, and a three power transfer switch contact assembly 1.

[0029] like Figure 2 , 3As shown: The electromagnetic drive assembly includes: a left mechanism housing 13, a right mechanism housing 14, a six-hole plate 3, a stepped shaft 15, and a conversion drive shaft 2; one six-hole plate 3 is fitted onto the conversion drive shaft 2, and six stepped shafts 15 pass through the holes of the six-hole plate 3, and another six-hole plate 3 is fitted onto it. These parts are fixed in the left mechanism housing 13 and the right mechanism housing 14; it also includes: a first rotary hook 16, a first magnetic yoke 5, a first cover plate 6, and a first coil 5. When the first coil is energized, the first iron core 17 is attracted, driving the first rotary hook 4 to move. The first rotary hook 16 drives the stepped shaft 15 and the six-hole plate 3 to rotate by an angle, which is also the rotation of the conversion drive shaft 2 by an angle, defined as clockwise. The return spring 25 pulls the first rotary hook 16 back to its original position.

[0030] like Figure 4 The electromagnetic drive assembly also includes: a second rotary hook 21, a second magnetic yoke 18, a second cover plate 20, and a second coil 19. When the second coil 19 is energized, the second iron core 22 is attracted, driving the second rotary hook 21 to move. The second rotary hook drives the stepped shaft 15 and the six-hole plate 3 to rotate by an angle, which means the drive shaft 2 rotates by an angle. This rotation direction should be counterclockwise. The return spring 25 pulls the second rotary hook 21 back to its original position.

[0031] There is a core guide groove 27 on both sides of the first and second cores. This core guide groove 27 is not open. This core guide groove 27 is also used to limit the return of the first rotary hook 16 and the second rotary hook 21 by the reset spring 25 after their operation. The two cover plate protrusions 26 in the middle of the second cover plate 20 are for this limit.

[0032] like Figure 11 The first iron core 17 and the first slewing hook 16 are connected by rivets 24, and the first slewing hook 16 can rotate freely.

[0033] like Figure 5 , 6 The manual operation component includes: an operating gear 12 and a driven gear 11, which are installed in the left mechanism housing 13 and the right mechanism housing 14; the driven gear 11 is fitted into the middle hole of the conversion drive shaft 2, and the two move synchronously; the operating gear 12 transmits torque to the driven gear 11 under manual operation, causing the conversion drive wheel 2 to rotate.

[0034] In the electromagnetic drive assembly and the manual operation assembly, when the conversion drive shaft 2 or the driven gear 11 is rotated, the six-lobed drive wheel 8 is also driven to rotate.

[0035] like Figure 7 The energy storage limiting assembly includes a six-lobed drive wheel 8, a drive block, and an energy storage spring 10; The six-lobed drive wheel 8 is integrated with the driven gear 11 and the conversion drive shaft 2, and these three parts are installed in the left mechanism housing 13 and the right mechanism housing 14; the drive block 9 is in the track groove 23 of the left mechanism housing 13 and the right mechanism housing 14, and the energy storage spring 10 is placed in the drive block 9.

[0036] like Figure 6 , 7 In the energy storage limit assembly, when the six-lobed drive wheel 8 rotates, the large tooth on it squeezes the drive block 9, and the drive block 9 compresses the energy storage spring 10. After the large tooth and the drive block 9 pass the highest point, the six-lobed drive wheel 8 accelerates its rotation. Assuming that the moving and stationary contacts of the three power supply changeover switch are in the open state at this time, the changeover drive shaft 2 completes a 60° rotation action, and at the same time drives the moving and stationary contacts of the three power supply changeover switch to close quickly.

[0037] like Figure 6 , 7 In the energy storage limit assembly, when the six-lobed drive wheel 8 rotates, the large tooth on it squeezes the drive block 9, and the drive block 9 compresses the energy storage spring 10. After the large tooth and the drive block 9 pass the highest point, the six-lobed drive wheel 8 accelerates its rotation. Assuming that the moving and stationary contacts of the three power supply changeover switch are closed at this time, the changeover drive shaft 2 completes a 60° rotation, and at the same time drives the moving and stationary contacts of the three power supply changeover switch to open quickly.

Claims

1. A switching drive mechanism for a three-power transfer switch, characterized in that, It includes an electromagnetic drive assembly, a manual operation assembly, an energy storage limit assembly, a left mechanism housing, a right mechanism housing, and a base for mounting the above components and parts.

2. The switching drive mechanism of the three-power transfer switch according to claim 1, characterized in that, The electromagnetic drive assembly includes: a left mechanism housing, a right mechanism housing, a six-hole plate, a stepped shaft, and a conversion drive shaft; one of the six-hole plates is fitted onto the conversion drive shaft, and six stepped shafts pass through the holes of the six-hole plate, and another six-hole plate is fitted onto it. The above parts are fixed in the left mechanism housing and the right mechanism housing. The electromagnetic drive assembly further includes: a first rotary hook, a first magnetic yoke, a first cover plate, and a first coil. When the first coil is energized, the first iron core is attracted, driving the first rotary hook to move. The first rotary hook drives the stepped shaft and the six-hole plate to rotate by an angle, which in turn causes the drive shaft to rotate by an angle, defined as clockwise. A reset spring pulls the first rotary hook back to its original position.

3. The switching drive mechanism of the three-power transfer switch according to claim 2, characterized in that, The electromagnetic drive assembly further includes: a second rotary hook, a second magnetic yoke, a second cover plate, and a second coil. When the second coil is energized, the second iron core is attracted, which drives the second rotary hook to move. The second rotary hook drives the stepped shaft and the six-hole plate to rotate by an angle, which in turn causes the drive shaft to rotate by an angle. This rotation direction should be counterclockwise. The reset spring pulls the second rotary hook back to its original position.

4. The switching drive mechanism of the three-power transfer switch according to claims 2 and 3, characterized in that, Both sides of the first and second iron cores have a guide groove. This guide groove is not through. This guide groove is also used to limit the movement of the first and second slewing hooks after they are moved by the return spring. The two cover plate protrusions in the middle of the two cover plates are for this limit.

5. The switching drive mechanism of the three-power transfer switch according to claim 2, characterized in that, The first iron core and the first slewing hook are connected by rivets, and the first slewing hook can rotate freely.

6. The switching drive mechanism of the three-power transfer switch according to claim 1, characterized in that, The manual operation component includes: an operating gear and a driven gear, which are installed in the left and right mechanism housings; the driven gear is fitted into the middle hole of the conversion drive shaft, and the two move synchronously; the operating gear transmits torque to the driven gear under manual operation, causing the conversion drive wheel to rotate.

7. The switching drive mechanism of the three-power transfer switch according to claim 1, characterized in that, The energy storage limiting component includes a six-lobed drive wheel, a drive block, and an energy storage spring; The six-lobed drive wheel is integrated with the driven gear and the conversion drive shaft, and the six-lobed drive wheel is installed in the left mechanism housing and the right mechanism housing; The drive block is placed in the track slots of the left and right mechanism housings, and the energy storage spring is placed inside the drive block.

8. The switching drive mechanism of the three-power transfer switch according to claims 2, 3, and 6, characterized in that, In the electromagnetic drive assembly and the manual operation assembly, when the drive shaft or driven gear rotates, the six-lobed drive wheel is driven to rotate.

9. The switching drive mechanism of the three-power transfer switch according to claim 8, characterized in that, In the energy storage limiting component, when the six-lobed drive wheel rotates, the large tooth on top squeezes the drive block, and the drive block compresses the energy storage spring. After the large tooth and the drive block pass the highest point, the six-lobed drive wheel accelerates its rotation. Assuming that the moving and stationary contacts of the three power supply conversion switch are in the open state at this time, the conversion drive shaft completes a 60° rotation action, and at the same time drives the moving and stationary contacts of the three power supply conversion switch to close quickly.

10. The switching drive mechanism of the three-power transfer switch according to claims 8 and 9, characterized in that, In the energy storage limiting component, when the six-lobed drive wheel rotates, the large tooth on top squeezes the drive block, and the drive block compresses the energy storage spring. After the large tooth and the drive block pass the highest point, the six-lobed drive wheel accelerates its rotation. Assuming that the moving and stationary contacts of the three power supply conversion switch are closed at this time, the conversion drive shaft completes a 60° rotation, and at the same time drives the moving and stationary contacts of the three power supply conversion switch to open quickly.

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