Dual power automatic transfer switch

Abstract

The application discloses a dual-power automatic transfer switch, which comprises a shell, a first swing rod assembly and a second swing rod assembly connected with the shell, and the first swing rod assembly and the second swing rod assembly are oppositely arranged and are connected with each other through two first connecting pieces; the first swing rod assembly and the second swing rod assembly each comprise a square shaft swing rod and a gear swing rod, and the square shaft swing rod and the gear swing rod are rotationally connected; the first connecting piece comprises a hinged part and an engaging part, the hinged part is hinged with the square shaft swing rod, and the engaging part is engaged with the gear swing rod. The N-pole contact group realizes that the normal power supply is connected with the load when the normal power supply is switched, the standby power supply is connected with the load when the standby power supply is switched, and the normal power supply and the standby power supply are simultaneously connected with the load in the double-division state. In the process of switching the power supply, the N-pole is always connected with the power supply, and the zero line offset phenomenon does not occur, so that the UPS equipment is protected from the risk of burning due to the zero line offset, and the safety of the power distribution system is improved.

Description

Technical Field

[0001] This invention relates to a dual-power automatic transfer switch, and more particularly to a dual-power automatic transfer switch with overlapping neutral lines. Background Technology

[0002] Automatic transfer switches (ATS) play a crucial role in power switching in dual-power systems, enabling the load to be switched to the other power source when one power source fails. In data centers and similar environments, UPS systems may experience neutral wire drift during power switching, potentially damaging critical equipment and posing a serious threat to personal safety and property. Therefore, there is an urgent need for an ATS that ensures the neutral wire remains continuously connected to the power source during the switching process. Summary of the Invention

[0003] To address the above problems, the present invention provides a dual-power automatic transfer switch.

[0004] Specifically, the following technical solutions are included:

[0005] A dual-power automatic transfer switch includes a housing, to which a first rocker arm assembly and a second rocker arm assembly are connected. The first and second rocker arm assemblies are arranged opposite to each other and connected to each other via two first connectors. Each of the first and second rocker arm assemblies includes a square-axis rocker arm and a gear rocker arm, which are rotatably connected. Each first connector includes a hinge portion and an engaging portion. The hinge portion is hinged to the square-axis rocker arm, and the engaging portion engages with the gear rocker arm. One end of one first connector engages with the gear rocker arm of the first rocker arm assembly, and the other end is hinged to the square-axis rocker arm of the second rocker arm assembly. One end of the other first connector is hinged to the square-axis rocker arm of the first rocker arm assembly, and the other end engages with the gear rocker arm of the second rocker arm assembly.

[0006] In one embodiment of the present invention, the square shaft rocker arm includes a first sleeve and a connecting rod. The connecting rod has a through square hole. The first sleeve is sleeved on the outside of the connecting rod and fixedly connected to the connecting rod. The first sleeve is connected to a first protrusion, and the first protrusion is provided with a first connecting hole. The gear rocker arm includes a second sleeve for connecting to a rocker arm on the second sleeve. The second sleeve is sleeved on the outside of the connecting rod and can rotate relative to the connecting rod. The second sleeve is connected to a second protrusion, and the second protrusion is provided with a second connecting hole. A gear is provided on the outer periphery of a portion of the second sleeve.

[0007] In one embodiment of the present invention, a first square shaft is inserted through the square hole of the first rocker arm assembly, and a second square shaft is inserted through the square hole of the second rocker arm assembly.

[0008] In one embodiment of the present invention, the first rocker arm assembly and the second rocker arm assembly further include a mounting sleeve, the mounting sleeve being sleeved outside the connecting rod, and the second sleeve of the gear rocker arm being sleeved outside the mounting sleeve and rotatable relative to the mounting sleeve.

[0009] In one embodiment of the present invention, the hinge portion and the engaging portion are connected by a bending portion, the bending portion being used to separate the two first connecting members.

[0010] In one embodiment of the present invention, the hinge portion is provided with a fifth connecting hole, which is hinged to the first connecting hole; the meshing portion is provided with a rack that meshes with the gear, and the lower end face of the meshing portion is provided with a downwardly extending abutment surface.

[0011] In one embodiment of the present invention, the housing is further connected to a support shaft, and the two support shafts abut against the two first connecting members respectively; the support shaft includes a shaft, a roller sleeved on the shaft, and a limiting plate; the shaft is connected to the housing, the roller is rotatably connected to the shaft, and the roller abuts against the abutting surface of the first connecting member; the limiting plate abuts against the lower end surface of the meshing part and the side wall of the abutting surface.

[0012] In one embodiment of the present invention, the housing is further connected to a first contact and a second contact. Both the first contact and the second contact include a movable contact, a third connecting hole, and a fourth connecting hole. The movable contact is disposed at the lower end of the first contact and the second contact. The first contact and the second contact are hinged to the housing through the third connecting hole and are rotatable about the third connecting hole. A connecting rod is hinged to the first contact and the second contact through the fourth connecting hole. The other end of the connecting rod is hinged to the second connecting hole of the gear rocker arm.

[0013] In one embodiment of the present invention, the housing is further connected to a load-side connecting plate, a first connecting plate, and a second connecting plate. The load-side connecting plate is connected to the load and has stationary contacts. The two stationary contacts correspond to the two moving contacts respectively. The first connecting plate is connected to a normal power supply and is electrically connected to the moving contact of the first contact. The second connecting plate is connected to a backup power supply and is electrically connected to the moving contact of the second contact.

[0014] In one embodiment of the present invention, the two first connecting members are arranged in opposite directions. When the first connecting member hinged to the first rocker arm assembly moves, it simultaneously drives the rotation of the gear rocker arm of the second rocker arm assembly; when the first connecting member hinged to the second rocker arm assembly moves, it simultaneously drives the rotation of the gear rocker arm of the first rocker arm assembly; when the dual-power automatic transfer switch is in the dual-open state, the moving contact on the first contact is in contact with the stationary contact, and the moving contact on the second contact is in contact with the stationary contact; when the dual-power automatic transfer switch performs the normal side switching, the first square shaft drives the square shaft rocker arm of the first rocker arm assembly to rotate, and The first connecting piece, which is hinged to the square shaft rocker arm of the first rocker arm assembly, is moved to the right, causing the gear rocker arm of the second rocker arm assembly to rotate under the meshing of the gear and rack. The gear rocker arm of the second rocker arm assembly pulls the second contact up through the connecting rod, causing the moving contact of the second contact to separate from the corresponding stationary contact below it. At this time, the first contact remains stationary, and the switch state is that the normal side is on and the standby side is off. When the dual power supply automatic transfer switch switches to the standby side, the second contact remains on while the first contact is raised, causing the moving contact of the first contact to separate from the corresponding stationary contact below it. The switch state is that the standby side is on and the normal side is off.

[0015] Beneficial effects

[0016] This invention provides an automatic transfer switch with overlapping neutral lines. During power switching, the N-pole of the transfer switch remains connected to the load on the normally used side, and on the standby side when the standby power is switched. In a dual-mode state, both the normally used and standby power supplies are simultaneously connected to the load. This invention ensures that the N-pole of the automatic transfer switch remains connected to the power supply throughout the power switching process, preventing any break in the neutral wire. This protects UPS equipment from the risk of burnout due to neutral wire misalignment and increases the safety of the power distribution system. Furthermore, this invention employs two lever assemblies interconnected by two first connectors and driven by gears and racks. This simplifies the structure while enabling the N-pole contact group of the transfer switch to connect the normally used side to the load when the normally used power is switched, and on the standby side to the load when the standby power is switched. In a dual-mode state, both the normally used and standby power supplies are simultaneously connected to the load. The load remains connected to the power supply throughout the switching process, making it suitable for applications where a break in the neutral wire is unacceptable during power switching. Attached Figure Description

[0017] Figure 1 This is a front view of the dual-power automatic transfer switch of the present invention.

[0018] Figure 2 This is a perspective view of the dual-power automatic transfer switch of the present invention without its housing.

[0019] Figure 3 This is a perspective view of the rocker arm assembly of the present invention.

[0020] Figure 4This is an exploded view of the rocker arm assembly of the present invention.

[0021] Figure 5 This is a perspective view of the first connector of the present invention.

[0022] Figure 6 This is a perspective view of the support shaft of the present invention.

[0023] Figure 7 This is a perspective view of the first or second contact of the present invention.

[0024] Figure 8 This is a schematic diagram showing the connection between the gear rocker arm, the first connecting member, the square shaft rocker arm, the connecting rod, and the contact of the present invention.

[0025] Figure 9 This is a schematic diagram of the dual-power automatic transfer switch of the present invention in the dual-open state.

[0026] Figure 10 This is a schematic diagram of the dual-power automatic transfer switch of the present invention during the common side switching process.

[0027] Figure 11 This is a schematic diagram of the automatic transfer switch for dual power supplies of the present invention when switching to the backup side.

[0028] Figure 12 This is a circuit diagram of the dual-power automatic transfer switch of the present invention.

[0029] Wherein: 1. First rocker arm assembly; 11. Square shaft rocker arm; 111. Square hole; 112. Connecting rod; 113. First connecting hole; 114. First protrusion; 115. First sleeve; 12. Mounting sleeve; 13. Gear rocker arm; 131. Second sleeve; 132. Gear; 133. Second connecting hole; 134. Second protrusion; 135. Rocker arm; 2. Second rocker arm assembly; 3. Support shaft; 31. Shaft; 32. Roller; 33. Limiting plate; 41. 411. First contact; 412. Moving contact; 413. Third connecting hole; 414. Fourth connecting hole; 42. Second contact; 5. Housing; 61. Load-side connecting plate; 611. Stationary contact; 62. First connecting plate; 63. Second connecting plate; 7. First connecting member; 71. Hinge part; 711. Fifth connecting hole; 72. Engaging part; 721. Rack; 722. Abutment surface; 73. Bending part; 8. Connecting rod; 91. First square shaft; 92. Second square shaft. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] In this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] like Figure 1 and 2 As shown, this embodiment provides a dual-power automatic transfer switch, including a housing 5. The housing 5 is connected to a first rocker arm assembly 1 and a second rocker arm assembly 2. The first rocker arm assembly 1 and the second rocker arm assembly 2 are arranged opposite to each other and connected to each other by two first connectors 7.

[0034] like Figure 2-4As shown, both the first rocker arm assembly 1 and the second rocker arm assembly 2 include a square shaft rocker arm 11 and a gear rocker arm 13, which are rotatably connected. The square shaft rocker arm 11 includes a first sleeve 115 and a connecting rod 112. The connecting rod 112 has a through square hole 111. The first sleeve 115 is sleeved on the connecting rod 112 and fixedly connected to it. The first sleeve 115 is connected to a first protrusion 114, which has a first connecting hole 113. The gear rocker arm 13 includes a second sleeve 131 to connect to a rocker arm 135 on the second sleeve 131. The second sleeve 131 is sleeved on the connecting rod 112 and can rotate relative to it. The second sleeve 131 is connected to a second protrusion 134, which has a second connecting hole 133. A gear 132 is provided on the outer periphery of a portion of the second sleeve 131. In this embodiment, the first pendulum assembly 1 and the second pendulum assembly 2 have the same structure, but different installation directions and positions; the first pendulum assembly 1 and the second pendulum assembly 2 can rotate about the center line of their respective square holes 111.

[0035] Optionally, a first square shaft 91 is inserted into the square hole 111 of the first rocker arm assembly 1, and a second square shaft 92 is inserted into the square hole 111 of the second rocker arm assembly 2. The first square shaft 91 drives the square shaft rocker arm 11 of the first rocker arm assembly 1 to rotate, and the second square shaft 92 drives the square shaft rocker arm 11 of the second rocker arm assembly 2 to rotate.

[0036] Optionally, the first rocker arm assembly 1 and the second rocker arm assembly 2 further include a mounting sleeve 12, which is sleeved on the connecting rod 112. The second sleeve 131 of the gear rocker arm 13 is sleeved on the mounting sleeve 12 and can rotate relative to the mounting sleeve 12. The mounting sleeve 12 can be made of copper, graphite, polytetrafluoroethylene, or other combinations of one or more materials, and serves to provide lubrication, wear resistance, and insulation. In this embodiment, the mounting sleeve 12 may not be installed, and the second sleeve 131 can be directly sleeved on the connecting rod 112, as long as the second sleeve 131 and the connecting rod 112 have lubrication, wear resistance, and insulation properties.

[0037] like Figure 5As shown, the first connecting member 7 includes a hinge portion 71 and an engaging portion 72. The hinge portion 71 and the engaging portion 72 are connected by a bending portion 73. The bending portion 73 is used to increase the distance between the engaging portions 72 of the two first connecting members 7, preventing the two first connecting members 7 from contacting each other and affecting the rotation of the first rocker arm assembly 1 and the second rocker arm assembly 2. The hinge portion 71 is provided with a fifth connecting hole 711, which is hinged to the first connecting hole 113. The engaging portion 72 is provided with a rack 721 that meshes with the gear 132, and the lower end face of the engaging portion 72 is provided with a downwardly extending abutment surface 722.

[0038] Optionally, the meshing surface of the gear 132 of the gear lever 13 and the rack 721 of the first connecting member 7 is not limited to the gear tooth profile; other meshing tooth profiles are also possible, and no specific limitation is made thereto.

[0039] Optionally, such as Figure 1 , 2 As shown in Figures 5, 6, and 8, the housing 5 is also connected to a support shaft 3. The two support shafts 3 respectively abut against the two first connecting members 7. The support shafts 3 are used to support the first connecting members 7 and also serve to limit the position of the first connecting members 7. The support shaft 3 includes a shaft 31, a roller 32 sleeved on the shaft 31, and a limiting plate 33. The shaft 31 is connected to the housing 5, and the roller 32 is rotatably connected to the shaft 31. The roller 32 abuts against the contact surface 722 of the first connecting member 7, thus supporting the first connecting member 7, preventing it from falling off, and ensuring its stable operation. The limiting plate 33 abuts against the lower end face of the meshing part 72 and the side wall of the contact surface 722. While supporting the lower end face of the meshing part 72, the limiting plate 33 abuts against the side wall of the contact surface 722, thus limiting the first connecting member 7 and preventing the two first connecting members 7 from shifting and colliding with each other during movement, ensuring the normal operation of the changeover switch.

[0040] Optionally, the structure of the support shaft 3 can also be in other forms, such as a stop or a slider, as long as it can support the first connecting member 7 and reduce friction, and there is no specific limitation.

[0041] Optionally, one end of one of the first connecting members 7 is engaged with the gear rocker arm 13 of the first rocker arm assembly 1, and the other end is hinged to the square shaft rocker arm 11 of the second rocker arm assembly 2; one end of the other first connecting member 7 is hinged to the square shaft rocker arm 11 of the first rocker arm assembly 1, and the other end is engaged with the gear rocker arm 13 of the second rocker arm assembly 2; the two first connecting members 7 are arranged in opposite directions and are arranged back and forth along the axial direction of the connecting rod 112; when the first connecting member 7 hinged to the first rocker arm assembly 1 moves, it simultaneously drives the rotation of the gear rocker arm 13 of the second rocker arm assembly 2; similarly, when the first connecting member 7 hinged to the second rocker arm assembly 2 moves, it simultaneously drives the rotation of the gear rocker arm 13 of the first rocker arm assembly 1.

[0042] Optionally, such as Figure 1 , 2 As shown in Figure 7, the housing 5 is also connected to a first contact 41 and a second contact 42. The first contact 41 and the second contact 42 have the same structure and are arranged opposite to each other. The first contact 41 and the second contact 42 each include a moving contact 411, a third connecting hole 412 and a fourth connecting hole 413. The moving contact 411 is located at the lower end of the first contact 41 and the second contact 42. The first contact 41 and the second contact 42 are hinged to the housing 5 through the third connecting hole 412 and can rotate around the third connecting hole 412. The first contact 41 and the second contact 42 are hinged to a connecting rod 8 through the fourth connecting hole 413. The other end of the connecting rod 8 is hinged to the second connecting hole 133 of the gear rocker arm 13.

[0043] Optionally, such as Figure 1 and 2 As shown, the housing 5 is also connected to a load-side connecting plate 61, a first connecting plate 62, and a second connecting plate 63. The load-side connecting plate 61 is connected to the load and has a stationary contact 611 connected to it. The two stationary contacts 611 correspond to the two moving contacts 411 respectively. The first connecting plate 62 is connected to power supply I and is electrically connected to the moving contact 411 of the first contact 41. The second connecting plate 63 is connected to power supply II and is electrically connected to the moving contact 411 of the second contact 42.

[0044] The working principle of this invention: The first square shaft 91 passes through the square hole 111 on the square shaft rocker arm 11 of the first rocker arm assembly 1, and can drive the square shaft rocker arm 11 of the first rocker arm assembly 1 to rotate along the central axis of the square hole 111. When the changeover switch is in the dual-open state, the position of the first square shaft 91 is as follows: Figure 9As shown, at this time, the moving contact 411 on the second contact 42 is in contact with the stationary contact 611, and the load-side connecting plate 61 and the first connecting plate 62 remain connected. When the changeover switch is switched to the normal operating side, the first square shaft 91 drives the square shaft rocker arm 11 of the first rocker arm assembly 1 to rotate counterclockwise, and pushes the first connecting piece 7, which is hinged to the square shaft rocker arm 11 of the first rocker arm assembly 1, to move to the right, thereby causing the gear rocker arm 13 of the second rocker arm assembly 2 to rotate counterclockwise under the meshing of the gear 132 and the rack 721. At this time, the gear rocker arm 13 of the second rocker arm assembly 2 pulls the second contact 42 up through the connecting rod 8, so that the moving contact 411 of the second contact 42 separates from the corresponding stationary contact 611 below it. At this time, the first contact 41 remains stationary, and the switch state is that the normal operating side is connected and the standby side is disconnected. Figure 10 As shown. Conversely, when the switch is switched to the standby side, the second contact 42 remains closed while the first contact 41 is raised, causing the moving contact 411 of the first contact 41 to separate from its corresponding stationary contact 611 below it. The switch state is that the standby side is closed and the normal side is open, as shown. Figure 11 As shown. Thus, this dual-power automatic transfer switch realizes the function of connecting only the normal power supply to the load when the normal power supply is switched on, connecting only the standby power supply to the load when the standby power supply is switched on, and connecting both the normal power supply and the standby power supply to the load simultaneously in the dual-mode state.

[0045] It should be noted that the positions of the primary power supply and the backup power supply in this invention can be interchanged. When the first swing arm assembly 1 serves as the primary side swing arm assembly, the corresponding primary side power supply ( Figure 12 When the I power supply is in use, the second pendulum assembly 2 serves as the backup pendulum assembly, corresponding to the backup power supply ( Figure 12 II power supply). When the first swing arm assembly 1 is used as the backup swing arm assembly, the corresponding backup power supply ( Figure 12 When the power supply is II, the second pendulum assembly 2 serves as the commonly used side pendulum assembly, corresponding to the commonly used side power supply ( Figure 12 (I power supply in the middle).

[0046] like Figure 12 As shown, the N-pole contact group of this invention realizes the switching of the commonly used power supply on the commonly used side ( Figure 12 When the I power supply is connected to the load, and the backup power supply is switched on, the backup power supply ( Figure 12In this invention, a dual-power automatic transfer switch with overlapping neutral lines ensures that the N-pole remains connected to the power supply during power switching, preventing any break in the neutral wire. This protects the UPS equipment from burnout due to neutral wire misalignment and increases the safety of the power distribution system. Furthermore, this invention employs two lever assemblies connected to each other via two first connectors and driven by gears and racks. This simplifies the structure while enabling the N-pole contact group of the transfer switch to connect the load to the normal power supply when switching to the normal power supply, and the load to the standby power supply when switching to the standby power supply. In the dual-power state, both the normal and standby power supplies are simultaneously connected to the load. The load remains connected to the power supply throughout the switching process, making it suitable for applications where a break in the neutral wire is unacceptable during power switching.

[0047] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the claims.

Claims

1. A dual-power automatic transfer switch, characterized in that, The device includes a housing (5) connected to a first rocker arm assembly (1) and a second rocker arm assembly (2). The first rocker arm assembly (1) and the second rocker arm assembly (2) are arranged opposite to each other and connected to each other by two first connectors (7). Each of the first rocker arm assembly (1) and the second rocker arm assembly (2) includes a square shaft rocker arm (11) and a gear rocker arm (13), which are rotatably connected. The first connector (7) includes a hinge portion (71) and a meshing portion (72). The hinge part (71) is hinged to the square shaft rocker arm (11), and the meshing part (72) meshes with the gear rocker arm (13); one end of one of the first connecting members (7) meshes with the gear rocker arm (13) of the first rocker arm assembly (1), and the other end is hinged to the square shaft rocker arm (11) of the second rocker arm assembly (2); one end of another of the first connecting members (7) is hinged to the square shaft rocker arm (11) of the first rocker arm assembly (1), and the other end meshes with the gear rocker arm (13) of the second rocker arm assembly (2).

2. The dual-power automatic transfer switch according to claim 1, characterized in that, The square shaft rocker arm (11) includes a first sleeve (115) and a connecting rod (112). The connecting rod (112) has a through square hole (111). The first sleeve (115) is sleeved on the outside of the connecting rod (112) and fixedly connected to the connecting rod (112). The first sleeve (115) is connected to a first protrusion (114), and the first protrusion (114) is provided with a first connecting hole (113). The gear rocker arm (13) includes a second sleeve (131) to connect to a rocker arm (135) on the second sleeve (131). The second sleeve (131) is sleeved on the outside of the connecting rod (112) and can rotate relative to the connecting rod (112). The second sleeve (131) is connected to a second protrusion (134), and the second protrusion (134) is provided with a second connecting hole (133). A gear (132) is provided on the outer periphery of a portion of the second sleeve (131).

3. The dual-power automatic transfer switch according to claim 2, characterized in that, A first square shaft (91) is inserted through the square hole (111) of the first rocker arm assembly (1), and a second square shaft (92) is inserted through the square hole (111) of the second rocker arm assembly (2).

4. The dual-power automatic transfer switch according to claim 3, characterized in that, The first rocker arm assembly (1) and the second rocker arm assembly (2) further include a mounting sleeve (12), which is sleeved outside the connecting rod (112), and the second sleeve (131) of the gear rocker arm (13) is sleeved outside the mounting sleeve (12) and can rotate relative to the mounting sleeve (12).

5. The dual-power automatic transfer switch according to claim 2, characterized in that, The hinge (71) and the engagement (72) are connected by a bend (73), which is used to separate the two first connectors (7).

6. The dual-power automatic transfer switch according to claim 2, characterized in that, The hinge part (71) is provided with a fifth connecting hole (711), which is hinged to the first connecting hole (113); the meshing part (72) is provided with a rack (721) that meshes with the gear (132), and the lower end face of the meshing part (72) is provided with a downwardly extending abutment surface (722).

7. The dual-power automatic transfer switch according to claim 6, characterized in that, The housing (5) is also connected to a support shaft (3), and the two support shafts (3) respectively abut against the two first connecting members (7); the support shaft (3) includes a shaft (31) and a roller (32) sleeved on the shaft (31) and a limiting plate (33); the shaft (31) is connected to the housing (5), the roller (32) is rotatably connected to the shaft (31), and the roller (32) abuts against the abutting surface (722) of the first connecting member (7); the limiting plate (33) abuts against the lower end face of the meshing part (72) and the side wall of the abutting surface (722).

8. The dual-power automatic transfer switch according to claim 3, characterized in that, The housing (5) is also connected to a first contact (41) and a second contact (42). The first contact (41) and the second contact (42) each include a moving contact (411), a third connecting hole (412) and a fourth connecting hole (413). The moving contact (411) is located at the lower end of the first contact (41) and the second contact (42). The first contact (41) and the second contact (42) are hinged to the housing (5) through the third connecting hole (412) and can rotate around the third connecting hole (412). The first contact (41) and the second contact (42) are hinged to a connecting rod (8) through the fourth connecting hole (413). The other end of the connecting rod (8) is hinged to the second connecting hole (133) of the gear rocker arm (13).

9. The dual-power automatic transfer switch according to claim 8, characterized in that, The housing (5) is also connected to a load-side connecting plate (61), a first connecting plate (62), and a second connecting plate (63). The load-side connecting plate (61) is connected to the load and has a stationary contact (611). The two stationary contacts (611) correspond to the two moving contacts (411) respectively. The first connecting plate (62) is connected to the normal power supply and is electrically connected to the moving contact (411) of the first contact (41). The second connecting plate (63) is connected to the backup power supply and is electrically connected to the moving contact (411) of the second contact (42).

10. The dual-power automatic transfer switch according to claim 9, characterized in that, The two first connecting pieces (7) are arranged in opposite directions. When the first connecting piece (7) hinged to the first rocker arm assembly (1) moves, it simultaneously drives the rotation of the gear rocker arm (13) of the second rocker arm assembly (2); when the first connecting piece (7) hinged to the second rocker arm assembly (2) moves, it simultaneously drives the rotation of the gear rocker arm (13) of the first rocker arm assembly (1); when the dual power supply automatic transfer switch is in the dual open state, the moving contact (411) on the first contact (41) contacts the stationary contact (611), and the moving contact (411) on the second contact (42) contacts the stationary contact (611); when the dual power supply automatic transfer switch performs the normal side switching, the first square shaft (91) drives the square shaft rocker arm (11) of the first rocker arm assembly (1) to rotate, and pushes the gear rocker arm (13) of the first rocker arm assembly (1) to rotate. The first connecting piece (7) hinged to the square shaft rocker arm (11) moves to the right, causing the gear rocker arm (13) of the second rocker arm assembly (2) to rotate under the meshing of the gear (132) and the rack (721). The gear rocker arm (13) of the second rocker arm assembly (2) pulls the second contact (42) up through the connecting rod (8), so that the moving contact (411) of the second contact (42) separates from the corresponding stationary contact (611) below it. At this time, the first contact (41) remains stationary, and the switch state is that the normal side is on and the standby side is off. When the dual power supply automatic transfer switch switches the standby side, the second contact (42) remains on and the first contact (41) is lifted, so that the moving contact (411) of the first contact (41) separates from the corresponding stationary contact (611) below it. The switch state is that the standby side is on and the normal side is off.

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