A neutral pole overlapping conversion structure and automatic transfer switch electrical appliance

Abstract

The present invention proposes a neutral pole overlapping conversion structure including a main control standby conversion structure and a standby control main conversion structure, wherein the main control standby conversion structure includes a main drive shaft, a main connecting rod assembly, and a main execution shaft; the standby control main conversion structure includes a standby drive shaft, a standby connecting rod assembly, and a standby execution shaft; the main drive shaft is rotatably mounted within the main execution shaft, one end of the main connecting rod assembly is connected to the main drive shaft, and the other end of the main connecting rod assembly is connected to the standby execution shaft, the standby drive shaft is rotatably mounted within the standby execution shaft, one end of the standby connecting rod assembly is connected to the standby drive shaft, and the other end of the standby connecting rod assembly is connected to one end of the main execution shaft. The neutral pole overlapping conversion structure has a simple structure and strong parts interchangeability, which can avoid safety issues caused by zero-ground potential drift during power switching.

Description

Technical Field

[0001] The invention belongs to the technical field of low-voltage electrical automatic transfer switch electrical appliances, and in particular relates to a new type of neutral pole overlapping conversion structure of an automatic transfer switch electrical appliance. Background Art

[0002] Automatic transfer switches are primarily used in critical power distribution systems. By monitoring the power supply status and detecting an anomaly (such as a power outage, phase loss, overvoltage, or undervoltage), they automatically switch from the abnormal power source to a functioning power source, thereby ensuring power continuity for the load. Consequently, automatic transfer switches are increasingly used in modern power distribution systems, particularly in critical applications like data centers and hospitals where power outages are unacceptable.

[0003] During the automatic transfer process, existing automatic transfer switches safely disconnect one power source before closing the other, preventing a short circuit caused by simultaneous closure of both power sources. However, with four-pole switches, the neutral line on the load side is completely disconnected for a period of time during the transfer process, causing the neutral line to become vacant. In data centers and other applications, this can cause the output neutral line of the UPS behind the automatic transfer switch to float. Excessive neutral-to-ground voltage at the output can cause the server to restart or burn out, posing a significant risk to the safe operation of the equipment.

[0004] Therefore, it is now necessary for the automatic transfer switch to adopt a new structure to ensure that the N pole is always connected during the conversion process, thus eliminating the safety hazard of zero-ground potential drift. Summary of the Invention

[0005] In view of the problems existing in the prior art, the present invention provides a neutral pole overlapping conversion structure with a simple structure, strong parts interchangeability, and a neutral line suspended during power switching.

[0006] To achieve the above-mentioned objectives, the present invention provides a neutral pole overlapping conversion structure including a main control standby conversion structure and a standby control main conversion structure, wherein the main control standby conversion structure includes a main drive shaft, a main connecting rod assembly and a main execution shaft; the standby control main conversion structure includes a standby drive shaft, a standby connecting rod assembly and a standby execution shaft; the main drive shaft is rotatably sleeved in the main execution shaft, one end of the main connecting rod assembly is connected to the main drive shaft, and the other end of the main connecting rod assembly is connected to the standby execution shaft, the standby drive shaft is rotatably sleeved in the standby execution shaft, one end of the standby connecting rod assembly is connected to the standby drive shaft, and the other end of the standby connecting rod assembly is connected to one end of the main execution shaft.

[0007] The main connecting rod assembly includes a main connecting rod, a left sub-connecting rod and a right sub-connecting rod; one end of the main connecting rod is connected to the main execution shaft, the other end of the main connecting rod is connected to one end of the left sub-connecting rod and the right sub-connecting rod, and the other end of the left sub-connecting rod and the right sub-connecting rod is connected to the backup drive shaft.

[0008] The other end of the main connecting rod is fixed to one end of the left sub-connecting rod and the right sub-connecting rod through a shaft and an open retaining ring.

[0009] One end of the main connecting rod is fixed to the main driving shaft through a shaft and an open retaining ring.

[0010] The main execution shaft includes a left execution shaft and a right execution shaft. The left execution shaft is provided with a first mounting hole, a first fan-shaped recess and a first connecting portion. The right execution shaft is provided with a second mounting hole, a second fan-shaped recess and a second connecting portion. When installed, the main drive shaft is rotatably inserted into the space composed of the first mounting hole, the second mounting hole, the first fan-shaped recess and the second fan-shaped recess.

[0011] The left executing shaft is provided with a positioning post, and the right executing shaft is provided with a positioning hole. During installation, the positioning post on the left executing shaft is plugged into the positioning hole on the right executing shaft for positioning.

[0012] The left executing shaft is provided with a positioning hole, and the right executing shaft is provided with a positioning hole. During installation, the positioning hole on the left executing shaft and the positioning hole on the right executing shaft are plugged and positioned by a cylindrical pin.

[0013] The main drive shaft is an integral structure, and the main drive shaft includes a left end portion, a right end portion and a connecting portion. The left end portion and the right end portion are symmetrically arranged on the left and right sides of the connecting portion. During installation, the left end portion of the main drive shaft is inserted into the first mounting hole, and the right end portion of the main drive shaft is inserted into the second mounting hole. The connecting portion of the main drive shaft rotates within the fan-shaped area formed by the first fan-shaped recess and the second fan-shaped recess.

[0014] The main control standby conversion structure and the standby control main conversion structure are the same structure.

[0015] Another object of the present invention is to provide an automatic transfer switch electrical appliance, comprising a housing and a neutral-level overlapping transfer structure, wherein the neutral-level overlapping transfer structure is the above-mentioned neutral-level overlapping transfer structure.

[0016] Compared with the prior art, the neutral pole overlapping conversion structure provided by the present invention has the following advantages:

[0017] 1) The neutral pole overlapping conversion structure of the present invention can ensure that when the automatic transfer switch switches from primary to standby mode, the N terminals of both circuits are in a closed state for a period of time. This ensures that the N pole remains powered on and avoids the safety hazard of zero-ground potential drift.

[0018] 2) The main driving shaft of the present invention adopts a centrally symmetrical design, which can effectively ensure the force balance of the structure and the stability of movement;

[0019] 3) The connecting rod assembly in the present invention adopts a Y-shaped symmetrical design, which avoids interference problems during movement and increases the interchangeability of parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the structure of a neutral pole overlapping conversion structure in a specific embodiment of the present invention;

[0021] Figure 2 Schematic diagram of the structure of a driving shaft in a specific embodiment of the present invention;

[0022] Figure 3 Schematic diagram of the structure of a connecting rod assembly in a specific embodiment of the present invention;

[0023] Figure 4 It is a structural schematic diagram of an execution shaft in a specific embodiment of the present invention;

[0024] Figure 5 Schematic diagram of the structure of the left execution shaft in a specific embodiment of the present invention;

[0025] Figure 6 Schematic diagram of the structure of the right execution shaft in a specific embodiment of the present invention;

[0026] Figure 7 This is a structural diagram of a neutral pole overlapping conversion structure in a specific embodiment of the present invention installed on an automatic transfer switch;

[0027] Figure 8 for Figure 7 A schematic structural diagram of the shell in FIG.

[0028] Serial number:

[0029] 01-main control standby conversion structure, 02-standby control main conversion structure, 1-main drive shaft, 2-main connection assembly, 3-main execution shaft, 4-standby drive shaft, 5-standby connecting rod assembly, 6-standby execution shaft, 11-left end, 12-right end, 13-left connecting part, 131-left connecting hole, 14-right connecting part, 141-right connecting hole, 15-square hole, 21-main connecting rod, 22-left branch connecting rod, 23-right branch connecting rod, 211-first connecting hole, 221-second connecting hole, 231-third connecting hole, 31-left execution shaft, 32-right execution shaft Rotating shaft, 311-first mounting hole, 312-first fan-shaped recess, 313-first connecting part, 314-first hole, 315-second hole, 316-positioning column, 321-second mounting hole, 322-second fan-shaped recess, 323-second connecting part, 324-third hole, 325-fourth hole, 326-positioning hole, 7-operating mechanism, 71-main push-pendulum, 72-standby push-pendulum, 81-first moving contact group, 82-second moving contact group, 91-first static contact, 92-second static contact, 10-housing, 101-mounting circular hole, 102-groove. DETAILED DESCRIPTION

[0030] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0031] like Figure 1 As shown, the neutral pole overlapping conversion structure in the specific embodiment of the present invention includes a main control standby conversion structure 01 and a standby control main conversion structure 02, the main control standby conversion structure 01 includes a main drive shaft 1, a main connecting rod assembly 2 and a main execution shaft 3; the standby control main conversion structure 02 includes a standby drive shaft 4, a standby connecting rod assembly 5 and a standby execution shaft 6; the main drive shaft 1 is rotatably mounted in the main execution shaft 3, one end of the main connecting rod assembly 2 is connected to the main drive shaft 1, and the other end of the main connecting rod assembly 2 is connected to the standby execution shaft 6, the standby drive shaft 4 is rotatably mounted in the standby execution shaft 6, one end of the standby connecting rod assembly 5 is connected to the standby drive shaft 4, and the other end of the standby connecting rod assembly 5 is connected to one end of the main execution shaft 3.

[0032] like Figure 2 , Figure 6 and Figure 7As shown, the main drive shaft 1 in this embodiment comprises a left end 11, a right end 12, and a connecting portion. The left and right ends 11 and 12 are symmetrically arranged on either side of the connecting portion. The connecting portion comprises a left connecting portion 13 and a right connecting portion 14. The left connecting portion 13 is provided with a left connecting hole 131, and the right connecting portion 14 is provided with a right connecting hole 141. During installation, the left end 11 of the main drive shaft 1 fits within the first mounting hole 311, and the right end 12 of the main drive shaft 1 fits within the second mounting hole 321. The connecting portion of the main drive shaft 1 rotates within the fan-shaped area formed by the first and second fan-shaped recesses 312 and 322. The main drive shaft 1 is a monolithic structure. A square hole 15 is also provided on the main drive shaft 1 for connection to the operating mechanism of the automatic transfer switch. The main drive shaft in the present invention adopts a centrally symmetrical design, which effectively ensures force balance and stability of the moving contact assembly during movement, significantly contributing to the maintenance of contact parameters such as the final pressure of the N phase.

[0033] like Figure 2-3 As shown, the main connecting rod assembly 2 in this embodiment includes a main connecting rod 21, a left branch connecting rod 22 and a right branch connecting rod 23; one end of the main connecting rod 21 is connected to the main execution shaft 3, and the other end of the main connecting rod 21 is connected to one end of the left branch connecting rod 22 and the right branch connecting rod 23, and the other end of the left branch connecting rod 22 and the right branch connecting rod 23 is connected to the spare drive shaft 4.

[0034] A first connecting hole 211 is provided at one end of the main connecting rod 21. During installation, one end of the main connecting rod 21 is placed between the left connecting portion 13 and the right connecting portion 14 of the main drive shaft 1. A shaft is passed through the left connecting portion 13, the first connecting hole 211, and the right connecting portion 14 in sequence, and open retaining rings are installed at both ends of the shaft to fix it. Two connecting holes are provided at the other end of the main connecting rod 21. The other end of the main connecting rod 21 is fixed to one end of the left branch connecting rod 22 and the right branch connecting rod 23 via a shaft and an open retaining ring. The left branch connecting rod 22 and the right branch connecting rod 23 in this embodiment have the same structure. The left branch connecting rod 22 and the right branch connecting rod 23 are symmetrically installed at the other end of the main connecting rod 21, and the main connecting rod assembly 2 is Y-shaped. A second connecting hole 221 is provided at the other end of the left branch connecting rod 22, and a third connecting hole 231 is provided at the other end of the right branch connecting rod 23. The main connecting rod assembly of the present invention adopts a Y-shaped symmetrical design, which avoids interference problems between the main control standby conversion structure and the standby control main conversion structure during movement, can ensure the smoothness of movement, and at the same time provides the difference between the main control standby conversion structure and the standby control main conversion structure only through assembly. The components themselves are universal, low in cost, and have strong parts interchangeability.

[0035] like Figure 2, as shown in Figures 4-6, the main execution shaft 3 in this embodiment includes a left execution shaft 31 and a right execution shaft 32. The left execution shaft 31 is provided with a first mounting hole 311, a first fan-shaped recess 312 and a first connecting portion 313, and the right execution shaft 32 is provided with a second mounting hole 321, a second fan-shaped recess 322 and a second connecting portion 323. During installation, the main drive shaft 1 is rotatably mounted in the space composed of the first mounting hole 311, the second mounting hole 321, the first fan-shaped recess 312 and the second fan-shaped recess 322.

[0036] The first connecting portion 313 is provided with a first hole 314 and a second hole 315. The first connecting portion 313 is fixed to the left connecting portion 13 via a shaft and a split retaining ring. Specifically, the shaft is sequentially passed through the first hole 314 and the second connecting hole 221, and then the split retaining rings are installed at both ends of the shaft to secure it. The second hole 315 is used to connect to the first moving contact group 81. Similarly, the second connecting portion 323 is provided with a third hole 324 and a fourth hole 325. The second connecting portion 323 is fixed to the right connecting portion 14 via a shaft and a split retaining ring. Specifically, the shaft is sequentially passed through the third hole 324 and the third connecting hole 231, and then the split retaining rings are installed at both ends of the shaft to secure it. The fourth hole 325 is used to connect to the first moving contact group 82.

[0037] In this embodiment, a positioning post 316 is provided on the left actuating shaft 31, and a positioning hole 326 is provided on the right actuating shaft 32. During installation, the positioning post 316 on the left actuating shaft 31 engages with the positioning hole 326 on the right actuating shaft 32 for positioning. In this embodiment, three positioning posts 316 are provided on the left actuating shaft 31, and correspondingly, three positioning holes 326 are provided on the right actuating shaft 32. The number of positioning posts 316 in this embodiment is the same as the number of positioning holes 326. The number of positioning posts in this embodiment can also be two, four, or more.

[0038] In this embodiment, a positioning hole can also be provided on the left execution shaft 31 and a positioning hole can be provided on the right execution shaft 32. During installation, the positioning holes on the left execution shaft 31 and the positioning holes on the right execution shaft 32 are positioned by plugging in cylindrical pins.

[0039] The standby-control-main conversion structure and the main-control-standby conversion structure in the present invention have the same structure, and the specific structure of the standby-control-main conversion structure will not be described here.

[0040] like Figure 7 and Figure 8As shown, the automatic transfer switch in the specific embodiment of the present invention includes the aforementioned neutral pole overlapping conversion structure, a housing 10, a first moving contact group 81, a second moving contact group 82, a first static contact 91, a second static contact 92 and an operating mechanism 7; the operating mechanism 7 includes a main push pendulum 71 and a standby push pendulum 72. Two mounting circular holes 101 and two grooves 102 are provided on the housing 10, and the first static contact 91 and the second static contact 92 are respectively provided in the two grooves 102 of the housing 10; the main control standby conversion structure 01 and the standby control main conversion structure 02 of the neutral pole overlapping conversion structure are respectively installed and placed in the two mounting circular holes 101 of the housing 10, and the square hole 15 of the main driving shaft 1 is inserted into the square shaft of the main push pendulum 71 of the operating mechanism 7 to connect the two. Similarly, the square hole of the standby control main conversion structure 02 is inserted into the square shaft of the standby push pendulum 72 of the operating mechanism 7 to connect the two.

[0041] When the automatic transfer switch needs to switch from one power source to another, the main push pendulum 71 of the operating mechanism 7 drives the main circuit A, B, and C three-phase to disconnect, while the main circuit N phase is still in a closed state. However, the main push pendulum 71 can drive the backup circuit N phase to close through the neutral line overlapping conversion structure, thereby achieving a state in which both circuits N phases are closed. When the backup push pendulum 72 of the operating mechanism 7 drives the backup circuit A, B, and C three-phase to close, the backup push pendulum drives the main circuit N phase to disconnect through the neutral line overlapping conversion structure. Therefore, through the neutral pole overlapping conversion structure, during the process of the automatic transfer switch automatically switching from the main circuit to the backup circuit, the N phases of the two circuits are in a closed state for a period of time in the middle, thus achieving the goal of maintaining power to the N pole and avoiding the safety hazard of zero-ground potential drift.

[0042] In the description of this application, it should be understood that the terms "up", "down", "front", "back", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on this application.

[0043] In the description of the present invention, the terms "first", "second", etc. are only used to distinguish the descriptions and should not be understood as indicating or implying relative importance.

[0044] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A neutral pole overlapping conversion structure, comprising a main control standby conversion structure and a standby control main conversion structure, characterized in that: The main-control-standby conversion structure includes a main drive shaft, a main connecting rod assembly and a main execution shaft; the standby-control-main conversion structure includes a standby drive shaft, a standby connecting rod assembly and a standby execution shaft; the main drive shaft is rotatably sleeved inside the main execution shaft, one end of the main connecting rod assembly is connected to the main drive shaft, and the other end of the main connecting rod assembly is connected to the standby execution shaft, the standby drive shaft is rotatably sleeved inside the standby execution shaft, one end of the standby connecting rod assembly is connected to the standby drive shaft, and the other end of the standby connecting rod assembly is connected to one end of the main execution shaft; The main connecting rod assembly includes a main connecting rod, a left sub-connecting rod and a right sub-connecting rod; one end of the main connecting rod is connected to the main execution shaft, the other end of the main connecting rod is connected to one end of the left sub-connecting rod and the right sub-connecting rod, and the other ends of the left sub-connecting rod and the right sub-connecting rod are connected to the backup drive shaft; The main execution shaft includes a left execution shaft and a right execution shaft, the left execution shaft is provided with a first mounting hole, a first fan-shaped recess and a first connecting portion, and the right execution shaft is provided with a second mounting hole, a second fan-shaped recess and a second connecting portion. When installed, the main drive shaft is rotatably mounted in a space formed by the first mounting hole, the second mounting hole, the first fan-shaped recess and the second fan-shaped recess; The main drive shaft includes a mounting hole, a left end, a right end and a connecting part. The left end and the right end are symmetrically arranged on the left and right sides of the connecting part. During installation, the left end of the main drive shaft is inserted into the first mounting hole, and the right end of the main drive shaft is inserted into the second mounting hole. The connecting part of the main drive shaft rotates within the fan-shaped area formed by the first fan-shaped recess and the second fan-shaped recess. The mounting hole is used to install the main push-and-switch connected to the operating mechanism of the automatic transfer switch electrical appliance.

2. The neutral pole overlapping conversion structure according to claim 1, characterized in that: The other end of the main connecting rod is fixed to one end of the left sub-connecting rod and the right sub-connecting rod through a shaft and an open retaining ring.

3. The neutral pole overlapping conversion structure according to claim 1 or 2, characterized in that: One end of the main connecting rod is fixed to the main driving shaft through a shaft and an open retaining ring.

4. The neutral pole overlapping conversion structure according to claim 1, characterized in that: The left executing shaft is provided with a positioning post, and the right executing shaft is provided with a positioning hole. During installation, the positioning post on the left executing shaft is plugged into the positioning hole on the right executing shaft for positioning.

5. The neutral pole overlapping conversion structure according to claim 1, characterized in that: The left executing shaft is provided with a positioning hole, and the right executing shaft is provided with a positioning hole. During installation, the positioning hole on the left executing shaft and the positioning hole on the right executing shaft are plugged and positioned by a cylindrical pin.

6. The neutral pole overlapping conversion structure according to claim 1, characterized in that: The main control standby conversion structure and the standby control main conversion structure are the same structure.

7. An automatic transfer switch electrical appliance, comprising a housing and a neutral pole overlapping transfer structure, characterized in that: The neutral level overlapping conversion structure is the neutral level overlapping conversion structure according to any one of claims 1 to 6.

Images