Mechanical interlocking structure of dual power transfer switch

Abstract

The utility model relates to dual power switch technical field, specifically disclose a kind of mechanical interlock structure of dual power change-over switch, including main body;Interlock mechanism subassembly;It includes shell, rotatable installation on the gear of shell, main rack and spare rack, main rack and spare rack are symmetrically arranged in gear both sides, main rack and spare rack are slidably installed in shell interior, main rack and spare rack same side are respectively equipped with with main power or spare power connection's suction whistle, suction whistle passes through shell and is connected with main power or spare power, main rack and spare rack top end are respectively fixedly connected with control rod one and control rod two, control rod one and control rod two top are penetrated and are threadedly connected with normal button and spare button by cover, main rack and spare rack are also connected with electromagnetic locking mechanism;Through the combination design of gear rack linkage, spring energy storage and electromagnetic locking, the reliable switching and automatic recovery of main spare power are realized, ensure that power system is safely operated.

Description

Technical Field

[0001] This utility model relates to the field of dual power supply switch technology, specifically a mechanical interlock structure for a dual power supply transfer switch. Background Technology

[0002] Dual power transfer switches (ATSEs) are important safety devices in power systems, used to switch to backup power in the event of a primary power failure, ensuring continuous power supply to critical loads. Existing dual power transfer switches have the following problems:

[0003] 1. Mechanical interlocking is unreliable: Some structures rely on electronic control to achieve interlocking. When the control system fails, it may cause two power supplies to be connected at the same time, which may lead to short circuit risk.

[0004] 2. Long switching time: Traditional mechanical structures have a large delay during the switching process, which cannot meet the needs of loads that are sensitive to power outages.

[0005] The purpose of this invention is to provide a mechanical interlock structure for a dual power supply transfer switch to solve the problems mentioned in the background art. Utility Model Content

[0006] To achieve the above objectives, this utility model provides a mechanical interlock structure for a dual power supply transfer switch, comprising a main body and an interlock mechanism assembly. The assembly includes a housing, a gear rotatably mounted on the housing, a main rack, and a spare rack. The housing is mounted on the main body, and a detachable cover is provided on the top of the housing. The main rack and the spare rack are symmetrically arranged on both sides of the gear and are slidably mounted inside the housing. A whistle connected to the main power supply or the spare power supply is provided on the same side of each rack, passing through the housing and connected to the main power supply or the spare power supply. A control lever one and a control lever two are fixedly connected to the top of each rack, respectively. A commonly used button and a spare button are threaded through the cover at the top of each control lever one and control lever two. An electromagnetic locking mechanism is also connected to the main rack and the spare rack.

[0007] The electromagnetic locking mechanism includes an electromagnetic coil fixed in the bottom of the housing and an armature fixed in the bottom of the main rack and the spare rack. When the electromagnetic coil is energized, it generates a magnetic force to attract the armature and restrict the movement of the rack. The gear and rack achieve mechanical interlocking to prevent simultaneous connection of two power supplies. The engagement whistle ensures the transmission of power signals. The electromagnetic locking prevents accidental switching and improves safety.

[0008] As a further improvement of this utility model, the top ends of the main rack and the spare rack are respectively provided with a limiting spring one and a limiting spring two. The limiting spring one and the limiting spring two are sleeved on the control rod one and the control rod two, and their tops are fixedly connected to the inner wall of the top of the housing. The limiting springs provide a restoring force, buffer external force impact, facilitate operation and extend service life.

[0009] As a further improvement of this utility model, the outer wall of the housing is symmetrically provided with through grooves, which allow the engagement whistle of the main rack and the spare rack to move up and down. The through grooves ensure smooth movement of the engagement whistle and ensure stable transmission of power signals.

[0010] As a further improvement of this utility model, the housing is provided with two cavities, and the main rack and the spare rack slide in the two cavities respectively. Sliders are symmetrically provided on both sides of the main rack and the spare rack. The inner walls of the two cavities are provided with guide grooves that slide and connect with the sliders. The sliders cooperate with the guide grooves to accurately guide the racks, prevent deviation and jamming, and ensure stable transmission.

[0011] As a further improvement of this utility model, a movable groove is provided between the two cavities. The gear is rotatably installed in the movable groove. The driving teeth on the opposite sides of the main rack and the spare rack are arranged between the slider. The main rack and the spare rack mesh with the gear. The gear rotatably installed in the movable groove meshes with the main rack and the spare rack. The reasonable layout and meshing method enable the gear to transmit power efficiently and realize the interlocking switching of the main power supply and the spare power supply.

[0012] As a further improvement of this utility model, the main body also has multiple mounting grooves, and the housing is provided with a mounting plate that matches the mounting grooves. The mounting plate is provided with through holes, and the mounting groove is provided with threaded holes that match the through holes. The mounting groove and the mounting plate are fixed by screws. The screw connection facilitates installation and disassembly and ensures that the component connection is stable.

[0013] As a further improvement of this utility model, the main body is also symmetrically provided with plug rods, and the side of the housing opposite to the mounting plate is provided with a slot that matches the plug rod. Multiple installation positions are also provided above the plug rod. The housing is provided with a fixing hole at a position parallel to the installation position. The installation position and the fixing hole are fixedly connected by bolts. The plug and bolt double fixation enhances the stability of the component and adapts to complex working conditions.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. This utility model adopts a pure mechanical interlocking scheme combining rigid gear and rack linkage with electromagnetic locking, eliminating reliance on electronic control. Even if the control system fails, it can effectively prevent the main and backup power supplies from being connected simultaneously, thereby reducing the risk of short circuits. At the same time, by utilizing the energy storage of limit springs, the switching time between the two power supplies is compressed, meeting the power supply requirements of power outage-sensitive loads.

[0016] 2. The interlocking mechanism component of this utility model achieves modular installation through mounting plates and plug-in rods, which effectively improves assembly efficiency, significantly reduces operation and maintenance costs and downtime, and the guide structure, combined with precision gear and rack transmission, reduces the problem of poor power contact, reduces the risk of electric arc, and extends the service life of mechanical parts. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the entire utility model. Figure 1 ;

[0018] Figure 2 This is a separate diagram of the main body and interlocking mechanism components of this utility model;

[0019] Figure 3 This is a schematic diagram of the main rack and spare rack of this utility model. Figure 1 ;

[0020] Figure 4 This is a schematic diagram of the main rack and spare rack of this utility model. Figure 2 .

[0021] In the diagram: 1. Main body; 11. Mounting groove; 12. Connecting rod; 121. Mounting station; 2. Interlocking mechanism assembly; 21. Housing; 211. Mounting plate; 212. Screw; 213. Cover; 214. Through groove; 215. Cavity; 22. Main rack; 221. Engaging whistle; 222. Slider; 23. Spare rack; 24. Gear; 25. Armature; 26. Limit spring one; 27. Limit spring two; 271. Control lever one; 272. Control lever two; 281. Common button; 282. Spare button. Detailed Implementation

[0022] To facilitate understanding of this utility model, a more comprehensive description of it will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of this utility model more thorough and comprehensive.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] The present invention will be further described in detail below with reference to the accompanying drawings.

[0025] Example 1:

[0026] Please see Figure 1-4 This utility model provides a mechanical interlock structure for a dual power supply transfer switch, including a main body 1 and an interlock mechanism assembly 2. The assembly includes a housing 21, a gear 24 rotatably mounted on the housing 21, a main rack 22, and a spare rack 23. The housing 21 is mounted on the main body 1, and a detachable cover 213 is provided on the top of the housing 21. The main rack 22 and the spare rack 23 are symmetrically arranged on both sides of the gear 24, and are slidably mounted inside the housing 21. The spare rack 23 is provided with a whistle 221 connected to the main power supply or the backup power supply on the same side. The whistle 221 passes through the housing 21 and is connected to the main power supply or the backup power supply. The top ends of the main rack 22 and the spare rack 23 are respectively fixedly connected to a control rod 1 271 and a control rod 272. The top ends of the control rod 1 271 and the control rod 272 are threaded through the cover 213 and connected to a regular button 281 and a spare button 282. The main rack 22 and the spare rack 23 are also connected to an electromagnetic locking mechanism.

[0027] The electromagnetic locking mechanism includes an electromagnetic coil fixed in the bottom of the housing 21 and an armature 25 fixed in the bottom of the main rack 22 and the spare rack 23. When the electromagnetic coil is energized, it generates a magnetic force to attract the armature 25 and restrict the movement of the rack. The gear 24 and rack achieve mechanical interlocking to prevent simultaneous connection of two power supplies. The engagement whistle 221 ensures the transmission of power signals. The electromagnetic locking prevents accidental switching and improves safety.

[0028] The main rack 22 and the spare rack 23 are respectively provided with a limiting spring 1 26 and a limiting spring 27 at their top ends. The limiting spring 1 26 and the limiting spring 27 are sleeved on the control rod 1 271 and the control rod 272, and their tops are fixedly connected to the inner wall of the top of the housing 21. The limiting springs provide a restoring force, buffer external impact, facilitate operation and extend service life.

[0029] The outer wall of the housing 21 is symmetrically provided with through grooves 214, which allow the engagement whistle 221 of the main rack 22 and the spare rack 23 to move up and down. The through grooves 214 ensure smooth movement of the engagement whistle 221 and ensure stable transmission of power signals.

[0030] The dual power transfer switch mechanical interlock structure of this embodiment includes a main body 1 and an interlock mechanism assembly 2. The housing 21 of the interlock mechanism assembly 2 is fixed in the mounting groove 11 of the main body 1 by a mounting plate 211 and screws 212. The cover 213 on the top of the housing 21 is removable for internal maintenance. The main rack 22 and the spare rack 23 are symmetrically arranged on both sides of the gear 24. The armature 25 at the bottom of the rack 22 cooperates with the electromagnetic coil at the bottom of the housing 21. When the main power supply is normal, the electromagnetic coil on the main power supply side is energized to attract the armature 25, causing the main rack 22 to move down. Through the linkage of the gear 24, the spare rack 23 moves up to disconnect the spare power supply. At this time, the limit spring is in a stretched state to provide a reset force. The whistle 221 of the main and spare racks 23 passes through the through groove 214 of the housing 21 and connects to the main power supply or the spare power supply. The width of the through groove 214 is slightly larger than the diameter of the whistle 221 to ensure that the whistle 221 moves up and down smoothly without shaking.

[0031] When the main power supply is in normal condition:

[0032] When the electromagnetic coil on the main power supply side is energized, it generates a magnetic field that attracts the armature 25, causing the main rack 22 to move down, and the main power supply whistle 221 is connected to the main power supply.

[0033] The main rack 22 moves down and is linked by the gear 24, causing the spare rack 23 to move up synchronously, and the spare power engagement whistle 221 is disconnected from the spare power supply;

[0034] The limit spring 26 is stretched to store elastic potential energy, providing power for power-off reset.

[0035] When switching during main power failure:

[0036] The control circuit detects a power outage in the main power supply and cuts off the power supply to the electromagnetic coil on the main power supply side.

[0037] The limit spring 26 releases its elastic potential energy, pulling the main rack 22 upward to reset;

[0038] The gear 24 moves the spare rack 23 downward, and the spare power supply whistle 221 connects to the spare power supply, completing the switching.

[0039] Main power restoration and switching:

[0040] The control circuit detects that the main power supply has been restored and connects the electromagnetic coil on the main power supply side.

[0041] The electromagnetic coil attracts the armature 25, and the main rack 22 moves down again to connect the main power supply;

[0042] The gear 24 is engaged to move the spare rack 23 upward, disconnecting the spare power supply and restoring the initial state.

[0043] Example 2:

[0044] Based on Example 1, please refer to the following in this implementation: Figure 2-4 The housing 21 has two cavities 215 inside. The main rack 22 and the spare rack 23 slide in the two cavities 215 respectively. Slider 222 is symmetrically provided on both sides of the main rack 22 and the spare rack 23. The inner wall of the two cavities 215 is provided with guide grooves that slide in connection with the sliders 222. The sliders 222 cooperate with the guide grooves to accurately guide the racks, prevent deviation and jamming, and ensure stable transmission.

[0045] A movable groove is also provided between the two cavities 215. The gear 24 is rotatably installed in the movable groove. The driving teeth on opposite sides of the main rack 22 and the spare rack 23 are arranged between the slider 222. The main rack 22 and the spare rack 23 mesh with the gear 24. The gear 24, which is rotatably installed in the movable groove, meshes with the main rack 22 and the spare rack 23. The reasonable layout and meshing method enable the gear 24 to transmit power efficiently and realize the interlocking switching between the main power supply and the spare power supply.

[0046] The housing 21 has two cavities 215 inside, which respectively accommodate the main rack 22 and the spare rack 23. The sliders 222 on both sides of the rack slide in cooperation with the guide grooves on the inner wall of the cavity 215. The guide grooves are 5mm deep to ensure the linear motion accuracy of the rack. The gear 24 is installed in the movable groove between the two cavities 215.

[0047] The sliders 222 on both sides of the main and spare racks 23 slide along the guide groove to ensure linear motion accuracy. The clearance between the sliders 222 and the guide groove is controlled at 0.05-0.1mm to reduce lateral sway.

[0048] When the main rack 22 moves down, the drive gear pushes the gear 24 to rotate clockwise. The gear 24 drives the spare rack 23 to move up. The transmission ratio of 1:1 ensures synchronous reverse movement. When the main rack 22 moves down to the limit position, the spare rack 23 moves up to the limit in sync, ensuring complete power switching.

[0049] Example 3:

[0050] Based on Example 1, please refer to the following in this implementation: Figure 2The main body 1 also has multiple mounting grooves 11, and the housing 21 is provided with a mounting plate 211 that matches the mounting grooves 11. The mounting plate 211 is provided with a through hole, and the mounting groove 11 is provided with a threaded hole that matches the through hole. The mounting groove 11 and the mounting plate 211 are fixed by screws 212. The screws 212 facilitate installation and disassembly, ensuring a stable connection of the components.

[0051] The main body 1 is also symmetrically provided with plug rods 12. The housing 21 is provided with a slot matching the plug rod 12 on the side opposite to the mounting plate 211. Multiple installation positions 121 are also provided above the plug rod 12. The housing 21 and the installation positions 121 are provided with fixing holes at parallel positions. The installation positions 121 and the fixing holes are fixedly connected by bolts. The plug and bolt double fixation enhances the stability of the component and adapts to complex working conditions.

[0052] The square plug-in rod 12 on the main body 1 mates with the slot of the housing 21 to achieve quick positioning. During installation, first align the slot with the plug-in rod 12 and insert it, then fix it with screws 212 through the through hole on the mounting plate 211 and the threaded hole of the mounting groove 11. The mounting station 121 of the main body 1 and the fixing hole of the housing 21 are reinforced with M6 bolts. The mounting station 121 has three threaded holes with a spacing of 20mm, which can be selected as needed to improve versatility. Align the slot of the housing 21 with the plug-in rod 12 of the main body 1 and insert it. The square cross-section ensures circumferential positioning accuracy. The length of the plug-in rod 12 ensures that the gap between the housing 21 and the main body 1 after insertion is less than 0.2mm. Align the through hole of the mounting plate 211 with the threaded hole of the mounting groove 11, screw in the M8 screws 212 for pre-tightening. Select the threaded hole of the mounting station 121 according to actual needs, align it with the fixing hole of the housing 21, and screw in the M6 ​​bolts to ensure connection rigidity.

[0053] The present invention has been described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A mechanical interlock structure of a dual power transfer switch, characterized by: Includes the main body (1); An interlocking mechanism assembly (2) includes a housing (21), a gear (24) rotatably mounted on the housing (21), a main rack (22), and a spare rack (23). The housing (21) is mounted on the main body (1), and a cover (213) is detachably provided on the top of the housing (21). The main rack (22) and the spare rack (23) are symmetrically arranged on both sides of the gear (24). The main rack (22) and the spare rack (23) are slidably mounted inside the housing (21). The main rack (22) and the spare rack (23) are respectively located on the same side. A whistle (221) is provided to be connected to the main power supply or the backup power supply. The whistle (221) passes through the housing (21) and is connected to the main power supply or the backup power supply. The top ends of the main rack (22) and the backup rack (23) are respectively fixedly connected to control rod one (271) and control rod two (272). The top ends of control rod one (271) and control rod two (272) are threaded through the cover (213) and connected to a common button (281) and a spare button (282). The main rack (22) and the backup rack (23) are also connected to an electromagnetic locking mechanism. The electromagnetic locking mechanism includes an electromagnetic coil fixed in the bottom of the housing (21) and an armature (25) fixed in the bottom of the main rack (22) and the spare rack (23). When the electromagnetic coil is energized, it generates a suction force to attract the armature (25) and restrict the movement of the rack.

2. The mechanical interlocking structure of a dual power transfer switch according to claim 1, characterized in that: The main rack (22) and the spare rack (23) are respectively provided with a limiting spring one (26) and a limiting spring two (27) at their top ends. The limiting spring one (26) and the limiting spring two (27) are sleeved on the control rod one (271) and the control rod two (272), and their tops are fixedly connected to the inner wall of the top of the housing (21).

3. The mechanical interlocking structure of a dual power transfer switch according to claim 2, characterized in that: The outer wall of the housing (21) is symmetrically provided with through grooves (214), which allow the engagement whistle (221) of the main rack (22) and the spare rack (23) to move up and down.

4. The mechanical interlocking structure of a dual power transfer switch according to claim 3, characterized in that: The housing (21) has two cavities (215) inside. The main rack (22) and the spare rack (23) slide in the two cavities (215) respectively. Slider (222) is symmetrically provided on both sides of the main rack (22) and the spare rack (23). The inner wall of the two cavities (215) is provided with guide grooves that are slidably connected to the sliders (222).

5. The mechanical interlock structure of a dual power transfer switch according to claim 4, characterized in that: A movable groove is provided between the two cavities (215), and the gear (24) is rotatably installed in the movable groove. The driving teeth on opposite sides of the main rack (22) and the spare rack (23) are arranged between the slider (222), and the main rack (22) and the spare rack (23) mesh with the gear (24).

6. The mechanical interlocking structure of a dual power transfer switch according to claim 1, characterized in that: The main body (1) also has multiple mounting grooves (11), and the housing (21) is provided with a mounting plate (211) that matches the mounting grooves (11). The mounting plate (211) is provided with through holes, and the mounting grooves (11) are provided with threaded holes that match the through holes. The mounting grooves (11) and the mounting plate (211) are fixed by screws (212).

7. The mechanical interlock structure of a dual power transfer switch according to claim 6, characterized in that: The main body (1) is also symmetrically provided with plug rods (12). The housing (21) is provided with a slot matching the plug rod (12) on the side opposite to the mounting plate (211). Multiple installation stations (121) are also provided above the plug rod (12). The housing (21) is provided with a fixing hole at a position parallel to the installation station (121). The installation station (121) and the fixing hole are fixedly connected by bolts.

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