Dual power transfer switch

Abstract

Embodiments of the present disclosure provide a dual power transfer switch comprising two switching mechanisms and an interlock. Each switching mechanism comprises a pivot, a driving member and a driving shaft. The driving member is adapted to rotate around the pivot. The driving shaft is arranged on the driving member to drive the moving contact support to rotate, wherein the driving shaft has an open state and a closed state. The interlock is adapted to move between a first position and a second position, the interlock comprises two locking portions, and when the interlock is in the first position, one of the two locking portions is coupled with the driving shaft in the closed state to restrict the interlock in the first position, and the interlock is located in the closing rotation path of the driving shaft in the open state, and when the driving shaft in the closed state switches to the open state, it is adapted to push the interlock to move from the first position to the second position, so as to move the interlock out of the closing rotation path of the driving shaft in the open state.

Description

Technical Field

[0001] The embodiments disclosed herein generally relate to the field of electrical equipment, and particularly to a dual power transfer switch. Background Technology

[0002] In some electrical equipment, to avoid power outages due to power failures, two independent power supplies are usually configured: a primary power supply and a backup power supply. The primary and backup power supplies selectively supply power to the equipment via a dual power transfer switch.

[0003] The dual-power transfer switch includes two contact assemblies and two opening / closing mechanisms. Each contact assembly includes a stationary contact and a moving contact mounted on a moving contact bracket. The moving contact bracket can switch between an open and a closed state. The switching of the moving contact bracket is driven by the main spring of the opening / closing mechanism. When the moving contact bracket is in the open state, the moving contact on the moving contact bracket is separated from the corresponding stationary contact. When the moving contact bracket is in the closed state, the moving contact on the moving contact bracket abuts against the corresponding stationary contact. During normal operation, the moving contact bracket of one contact assembly is in the closed state, while the moving contact bracket of the other contact assembly is in the open state, allowing one of the main power supply and the backup power supply to power the equipment. Utility Model Content

[0004] In a first aspect of this disclosure, a dual-power transfer switch is provided, comprising two opening / closing mechanisms and an interlocking element. Each opening / closing mechanism includes a pivot, a drive member, and a drive shaft. The drive member is adapted to rotate about the pivot. The drive shaft is disposed on the drive member to drive a moving contact support to rotate, wherein the drive shaft has an open state and a closed state, and when the drive shaft of one opening / closing mechanism is in the closed state, the drive shaft of the other opening / closing mechanism is in the open state. The interlocking element is adapted to move between a first position and a second position, the interlocking element including two locking portions, and when the interlocking element is in the first position, one of the locking portions couples with the drive shaft in the closed state to restrict the interlocking element to the first position, and the interlocking element is located on the closing rotation path of the drive shaft in the open state, and when the drive shaft in the closed state switches to the open state, it is adapted to push the interlocking element from the first position to the second position to move the interlocking element out of the closing rotation path of the drive shaft in the open state to allow the drive shaft in the open state to couple with the other of the two locking portions.

[0005] In some embodiments, the interlocking element is adapted to move in a direction parallel to the center line connecting the pivots of the two opening and closing mechanisms.

[0006] In some embodiments, the interlocking component is provided with two elongated holes, which are respectively slidably engaged with the pivots of two opening and closing mechanisms.

[0007] In some embodiments, the two locking parts are located at both ends of the interlocking member.

[0008] In some embodiments, each locking portion includes a positioning groove, the positioning groove including an opening for a corresponding drive shaft to enter or exit the positioning groove.

[0009] In some embodiments, the interlocking component is provided with two elongated holes, which are slidably engaged with the pivots of the two opening and closing mechanisms, respectively. A first engagement gap is formed between each elongated hole and the corresponding pivot. When the positioning groove is coupled with the drive shaft in the closed state, a second engagement gap is formed between the positioning groove and the drive shaft. The second engagement gap is greater than the first engagement gap.

[0010] In some embodiments, the interlocking component further includes two stop surfaces adjacent to the two locking portions, each stop surface being located on one side of the opening of the positioning groove of the corresponding locking portion, and one of the two stop surfaces being located on the closing rotation path of the drive shaft in the open state.

[0011] In some embodiments, the interlocking member further includes two pushing surfaces adjacent to the two locking portions, each pushing surface being located on the other side of the opening of the positioning groove of the corresponding locking portion, and one of the two pushing surfaces being located on the opening rotation path of the drive shaft in the closed state, so as to be pushed by the drive shaft switching from the closed state to the open state, so as to switch the interlocking member between a first position and a second position.

[0012] In some embodiments, each positioning groove is an arc groove, and each pushing surface is an inclined surface.

[0013] In some embodiments, when the drive shaft is in the open state, the drive shaft has an open limit position and a closed energy storage position. In the open limit position, the drive shaft abuts against the corresponding push surface, and in the closed energy storage position, the drive shaft separates from the corresponding push surface to allow the interlocking element to be pushed.

[0014] In embodiments according to this disclosure, the dual-power transfer switch includes an interlocking element that is movable between a first position and a second position. When the drive shaft of one closing / opening mechanism is in the closed state, the interlocking element is located on the closing rotation path of the drive shaft of the other closing / opening mechanism. When the drive shaft of one closing / opening mechanism switches from the closed state to the open state, the interlocking element moves out of the closing rotation path of the drive shaft of the other closing / opening mechanism. Thus, the mechanical interlocking reliably ensures the interlocking of the two closing / opening mechanisms, preventing the two contact assemblies corresponding to the two closing / opening mechanisms from closing simultaneously, thereby improving the electrical safety of the dual-power transfer switch.

[0015] It should be understood that the content described in this section is not intended to limit the key or essential features of the embodiments of this disclosure, nor is it intended to restrict the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Attached Figure Description

[0016] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. In the drawings, the same or similar reference numerals denote the same or similar elements, wherein:

[0017] Figure 1 A schematic diagram of a dual power supply transfer switch according to some embodiments of the present disclosure is shown for ease of explanation. Figure 1 Interlocking components are not shown in the diagram.

[0018] Figures 2 to 5 A schematic diagram of the normal switching process of the two opening and closing mechanisms of a dual-power transfer switch according to some embodiments of the present disclosure is shown for ease of explanation. Figures 2 to 5 The telescopic rods of the release devices for each opening and closing mechanism are not shown in the diagram; and

[0019] Figure 6 A schematic diagram of the abnormal operating state of two opening and closing mechanisms of a dual-power transfer switch according to some embodiments of the present disclosure is shown. Detailed Implementation

[0020] Preferred embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0021] The term "comprising" and its variations as used herein signify open inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "at least partially based on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc., may refer to different or the same objects.

[0022] As described above, the dual-power transfer switch includes two contact assemblies and two opening / closing mechanisms. The switching of the opening / closing states of each contact assembly is driven by the main spring of the corresponding opening / closing mechanism. To ensure that each contact assembly can open and close quickly, the opening / closing mechanism includes a main spring capable of storing high energy. Thus, even if the moving and stationary contacts of a contact assembly are welded together, the moving contact support can still be pulled apart by the main spring to move in the opening direction. However, if the contact assembly is welded together or if there is a malfunction in the control circuit of the dual-power transfer switch, it is possible that while the moving contact support of one contact assembly is moving in the closing direction under the drive of its corresponding opening / closing mechanism, the moving contact support of the other contact assembly is pulled apart and moves in the opening direction under the drive of its corresponding opening / closing mechanism. In this case, one contact assembly may be closed, while the arc generated by the opening of the other contact assembly has not yet extinguished, resulting in both contact assemblies being in a closed state, causing a short circuit.

[0023] In the dual power transfer switch provided in this embodiment, an interlocking element can be provided to form a power interlock, thereby effectively preventing both contact assemblies of the dual power transfer switch from being in a closed state. In the following, [the following will be combined with...] Figures 1 to 6 The principles of this disclosure are described.

[0024] Figure 1 A schematic diagram of a dual power supply transfer switch 1000 according to some embodiments of the present disclosure is shown for ease of explanation. Figure 1 Two opening and closing mechanisms are shown, but the interlocking components are not shown. Figures 2 to 5 A schematic diagram of the normal switching process of two opening and closing mechanisms of a dual power supply transfer switch 1000 according to some embodiments of the present disclosure is shown. Figure 6 A schematic diagram of the abnormal operating state of two opening and closing mechanisms of a dual power transfer switch 1000 according to some embodiments of the present disclosure is shown.

[0025] See Figures 1 to 5 The dual-power transfer switch 100 includes two opening and closing mechanisms and an interlocking element 30. The two opening and closing mechanisms are opening and closing mechanism 10 and opening and closing mechanism 20. The dual-power transfer switch 100 also includes two contact assemblies (not shown). Each opening and closing mechanism is used to drive the moving contact support of the corresponding contact assembly to perform an opening rotation or a closing rotation, so that the corresponding contact assembly switches to the opening state or the closing state.

[0026] See Figure 1 In some embodiments, the opening and closing mechanism 10 includes a pivot 11, a drive member 12, a drive shaft 13, a mounting base 14, two top pushers 141, two main springs 15, and an unlocking device 16.

[0027] The mounting base 14 is mounted on the frame (not shown) of the dual power transfer switch 100 via a pivot 11 at its center. The second end of the drive member 12 is pivotally connected to the pivot 11 to accommodate rotation about the pivot 11. The drive shaft 13 is positioned between the first end 121 and the second end of the drive member 12 and spaced a certain distance from the pivot 11. The drive shaft 13 is connected to the moving contact support, for example, via a crank arm (not shown) or other suitable structure. The drive shaft 13 rotates about the pivot 11 with the drive member 12 to drive the moving contact support and the moving contact located on the moving contact support to perform opening or closing rotation.

[0028] Two main spring support rods 151 are pivotally connected to both sides of the mounting base 14 via two push pins 141. Two main springs 15 are sleeved on the two main spring support rods 151. The mounting base 14 can rotate clockwise or counterclockwise under the action of external force to store energy in the two main springs 15. When the two main springs 15 release energy, one of the push pins 141 pushes the corresponding side of the driving member 12, causing the driving member 12 to rotate around the pivot 11, thereby causing the drive shaft 13 to drive the moving contact bracket to rotate to open or close the circuit.

[0029] Drive shaft 13 includes a closed state (see...) Figure 1 and Figure 2 ) and tripped status (see Figure 4 and Figure 5 The closing state of drive shaft 13 corresponds to the closing state of the contact assembly, at which time the moving contact on the moving contact bracket and the corresponding stationary contact are connected to each other. The opening state of drive shaft 13 corresponds to the opening state of the contact assembly, at which time the moving contact on the moving contact bracket and the corresponding stationary contact are separated from each other.

[0030] The first end 121 of the drive member 12, away from the pivot 11, cooperates with the release device 16 to allow the two main springs 15 to remain in a stored-energy state. In some embodiments, the release device 16 includes a telescopic rod 161 and two release levers (release lever 162 and release lever 163). Release lever 162 is rotatable about its own axis between a first stop position and a first unlocked position. Release lever 163 is rotatable about its own axis between a second stop position and a second unlocked position.

[0031] In some embodiments, the release lever 162 is provided with a first stop (not shown in the figure), and the release lever 163 is provided with a second stop (not shown in the figure). In some embodiments, the stop portions (first stop portion and second stop portion) of each release lever (release lever 162 and release lever 163) include a semi-shaft structure, that is, a section is formed on a portion of the outer peripheral wall of each release lever instead of a complete circle. In some embodiments, the cross-section of each stop portion is, for example, D-shaped; of course, the stop portion may also have other embodiments. Each release lever can be held in a stop position (first stop position and second stop position) by the action of a torsion spring (not shown in the figure). In the stop position, the stop portion of each release lever is located on the rotation trajectory of the first end 121 of the drive member 12, and the first end 121 of the drive member 12 cannot pass over any release lever. Each release lever is provided with a radial protrusion (see Figure 1 The telescopic rod 161 (with radial protrusions 1621 and 1631) abuts against the radial protrusions of the two release levers. When the telescopic rod 161 extends, the radial protrusions cause each release lever to rotate about its own axis to the release position. When both release levers are in the release position (first release position and second release position), the stop portion of each release lever moves out of the rotation trajectory of the first end 121 of the drive member 12, thereby allowing the first end 121 of the drive member to pass over either release lever. In some embodiments, the extension and retraction of the telescopic rod 161 can be driven by electromagnetic force and spring force.

[0032] See back Figure 1 In some embodiments, the first end 121 of the drive member 12 includes a first portion 1211 and a second portion 1212, which are generally V-shaped. In some embodiments, when the drive shaft 13 is in the closed state, the first portion 1211 is clamped by the first stop portion of the release lever 162 and the second stop portion of the release lever 163. When the drive shaft 13 is in the open state, the second portion 1212 is located between the first stop portion and the second stop portion, and the second portion 1212 is rotatable between the first stop portion and the second stop portion, so that the drive shaft 13 in the open state can rotate from the open limit position to the closed energy storage position.

[0033] The opening and closing mechanism 20 includes a pivot 21, a drive member 22, a drive shaft 23, a mounting base 24, two top pushers 241, two main springs 25, two main spring support rods 251, and a release device 26. The second end of the drive member 22 is pivotally connected to the pivot 21 to accommodate rotation about the pivot 21. The first end 221 of the drive member 22, away from the pivot 21, cooperates with the release device 26 to allow the two main springs 25 to remain in an energized state.

[0034] The release device 26 includes a telescopic rod 261 and two release rods (release rod 262 and release rod 263). Release rod 262 can rotate about its own axis between a first stop position and a first release position. Release rod 263 can rotate about its own axis between a second stop position and a second release position. Release rod 262 is provided with a first stop portion (not shown in the figure), and release rod 263 is provided with a second stop portion (not shown in the figure). In some embodiments, the stop portions (first stop portion and second stop portion) of each release rod (release rod 262 and release rod 263) both include a half-shaft structure. Each release rod may also be provided with a radial protrusion (see...). Figure 2 (Radial protrusions 2621 and 2631 in the middle).

[0035] In some embodiments, the first end 221 of the drive member 22 includes a first portion 2211 and a second portion 2212, which are generally V-shaped. In some embodiments, when the drive shaft 23 is in the closed state, the first portion 2211 is clamped by the first stop portion of the release lever 262 and the second stop portion of the release lever 263. When the drive shaft 23 is in the open state (see...), the first portion 2211 is clamped by the first stop portion of the release lever 262 and the second stop portion of the release lever 263. Figure 2 and Figure 3 When the circuit is open, the second part 2212 is located between the first stop and the second stop, and the second part 2212 can rotate between the first stop and the second stop so that the drive shaft 23 in the open state can rotate from the open limit position to the closed energy storage position.

[0036] In some embodiments, the opening and closing mechanism 20 and the opening and closing mechanism 10 have largely the same structure. The structure and function of each component of the opening and closing mechanism 20 and the connection relationship between different components can be referred to the description above regarding the structure and function of each component of the opening and closing mechanism 10 and the connection relationship between different components, and will not be described in detail here.

[0037] As described above, the drive shaft 23 includes a closed state and an open state. In the closed state, the moving contact on the moving contact bracket and the corresponding stationary contact are connected to each other. In the open state, the moving contact on the moving contact bracket and the corresponding stationary contact are separated from each other.

[0038] When one of the drive shafts 13 and 23 is in the closed state, the other should be in the open state. Figures 2 to 5 In the dual power transfer switch shown, Figure 2 and Figure 3 In the circuit, the drive shaft 13 of the opening and closing mechanism 10 is in the closed state, and the drive shaft 23 is in different positions in the open state. Figure 4 Both the opening and closing mechanism 10 and the opening and closing mechanism 20 are in the open state. Figure 5The opening and closing mechanism 10 is in the open state, and the drive shaft 23 is in the closed state.

[0039] In some embodiments, see Figure 2 and Figure 4 The interlocking member 30 can move between a first position and a second position. In some embodiments, Figure 2 and Figure 3 The position of the interlock component 30 can be referred to as the first position. Figure 4 and Figure 5 The position of the interlocking component 30 can be referred to as the second position.

[0040] The interlocking component 30 includes two locking parts, namely locking part 31 and locking part 32. See also Figure 2 and Figure 3 In some embodiments, when the interlock 30 is in the first position, the locking part 31 couples with the drive shaft 13 in the closed state to restrict the interlock 30 to the first position. The locking part 32 disengages from the drive shaft 23 in the closed state (it should be noted that...). Figure 2 (The top pusher 241 and the locking part 32 are not coupled). At this time, the interlocking member 30 is located on the closing rotation path of the drive shaft 23 in the open state, thereby the interlocking member 30 stops the drive shaft 23 from switching to the closing state by means of mechanical interlocking.

[0041] See Figure 3 and Figure 4 When the drive shaft 13, which is in the closed state, switches to the open state, the drive shaft 13 can push the interlock member 30 to move from the first position to the second position, so that the interlock member moves out of the closing rotation path of the drive shaft 23, thereby allowing the drive shaft 23 to switch to the closed state.

[0042] See Figure 5 Drive shaft 13 is in the open state, and drive shaft 23 is in the closed state. At this time, drive shaft 23 is coupled with locking part 32, thus restricting interlocking part 30 to the second position. Locking part 31 is separated from drive shaft 13 in the closed state (it should be noted that...). Figure 5 (The top pusher 141 and the locking part 31 are not coupled). At this time, the interlocking member 30 is located on the closing rotation path of the drive shaft 13 in the open state, thereby the interlocking member 30 stops the drive shaft 13 from switching to the closing state by means of mechanical interlocking.

[0043] It is understood that when the drive shaft 23 switches from the closed state to the open state, the drive shaft 23 can push the interlock member 30 to move from the second position to the first position, so that the interlock member 30 moves out of the closing rotation path of the drive shaft 13, thereby allowing the drive shaft 13, which is in the open state, to switch to the closed state. When the drive shaft 13 moves to the closed state, the dual power supply transfer switch 100 returns to its original position. Figure 1 The state shown.

[0044] As described above, the dual-power transfer switch 100 provided in this embodiment includes an interlocking component 30, which can move between a first position and a second position. When the drive shaft of one closing / opening mechanism is in the closed state, the interlocking component 30 is located on the closing rotation path of the drive shaft of the other closing / opening mechanism. When the drive shaft of one closing / opening mechanism switches from the closed state to the open state, the interlocking component 30 moves out of the closing rotation path of the drive shaft of the other closing / opening mechanism. Thus, the mechanical interlocking reliably ensures the interlocking of the two closing / opening mechanisms, preventing the two contact assemblies corresponding to the two closing / opening mechanisms from closing simultaneously, thereby improving the electrical safety of the dual-power transfer switch.

[0045] See Figures 2 to 5 In some embodiments, the interlocking member 30 is adapted to move in a direction parallel to the center line M connecting pivots 11 and 21, which facilitates the installation and manufacture of the interlocking member 30. In some embodiments, the interlocking member 30 is provided with two elongated holes 301, one of which slides with pivot 11 and the other with pivot 21. This allows the interlocking member 30 to easily move in a direction parallel to the center line M. Of course, in some alternative embodiments, the interlocking member 30 can also move in a direction parallel to the center line M through other implementations.

[0046] In some embodiments, locking part 31 and locking part 32 each include a positioning groove, the positioning groove including an opening (not labeled in the figure), the opening of each positioning groove allowing the corresponding drive shaft 13 or drive shaft 23 to enter the positioning groove to couple with the corresponding locking part 31 or locking part 32, and allowing the corresponding drive shaft to leave the positioning groove. In some embodiments, the positioning groove is an arc-shaped groove, the arc-shaped groove extending a certain length with the corresponding pivot 11 or pivot 21 as the center.

[0047] In some embodiments, the interlocking member 30 further includes a stop surface 33 adjacent to the locking portion 31 and a stop surface 34 adjacent to the locking portion 32. The stop surface 33 is located on one side of the opening of the positioning groove of the locking portion 31. See also Figure 5 When drive shaft 23 is in the closed state and drive shaft 13 is in the open state, stop surface 33 is located on the closing rotation path of drive shaft 13 to prevent drive shaft 13 from switching to the closed state. See also Figure 2 and Figure 3 When drive shaft 13 is in the closed state and drive shaft 23 is in the open state, stop surface 34 is located on the closing rotation path of drive shaft 23 to prevent drive shaft 23 from switching to the closed state.

[0048] In some embodiments, the stop surface 33 may be a plane parallel to the center line M. In some embodiments, the stop surface 34 may be a plane parallel to the center line M. This makes it easy to manufacture the stop surface 33 and the stop surface 34.

[0049] In some embodiments, the interlock member 30 may further include a push surface 35 adjacent to the locking part 31, the push surface 35 being located on the other side of the opening of the positioning groove of the locking part 31. In some embodiments, the push surface 35 may be an inclined surface. When the drive shaft 13 is in the closed state, the push surface 35 is located on the opening rotation path of the drive shaft 13. When the drive shaft 13 switches from the closed state to the open state, the drive shaft 13 may push the push surface 35 to switch the interlock member 30 between a first position and a second position. Correspondingly, the interlock member 30 may further include a push surface 36 adjacent to the locking part 32, the push surface 36 being located on the other side of the opening of the positioning groove of the locking part 32. In some embodiments, the push surface 36 may be an inclined surface. When the drive shaft 23 is in the closed state, the push surface 36 is located on the opening rotation path of the drive shaft 23. When the drive shaft 23 switches from the closed state to the open state, the drive shaft 23 may push the push surface 36 to switch the interlock member 30 between a first position and a second position.

[0050] In some embodiments, locking parts 31 and 32 may be located at both ends of the interlocking member 30, which facilitates the processing of the interlocking member 30.

[0051] The following is combined Figures 2 to 5 This describes the normal opening and closing process of the two opening and closing mechanisms of a dual power transfer switch 100 according to some embodiments of the present disclosure.

[0052] See Figure 2 The interlocking member 30 is in the first position, and all release levers are in the stop position. The two main springs 15 have driven the drive shaft 13 to the closed state, and the first part 1211 of the drive member 12 is clamped between the first stop of the release lever 162 and the second stop of the release lever 163. The two main springs 25 have driven the drive shaft 23 to the open state, more specifically, the drive shaft 23 is in the open limit position and abuts against the corresponding push surface 36. At this time, the first part 2211 of the drive member 22 has passed the release lever 262, and the second part 2212 has passed the release lever 263 but not the release lever 262. The second part 2212, for example, abuts against the tangential surface of the half-shaft structure of the release lever 262.

[0053] See Figure 3An external force (such as the driving force from the motor) applies force to mounting base 14 and mounting base 24, causing mounting base 14 to rotate, and both main springs 15 and 25 are in an energy-storing state. The position of drive shaft 13 remains substantially unchanged. Drive member 22 is pushed away from the cross-section of release lever 262 by the upper pusher 241 and can abut against the cross-section of the half-shaft structure of release lever 263. At this time, drive shaft 23 is in the open state, more specifically in the closed energy-storing position, preparing for subsequent closing rotation. Drive shaft 23 in the closed energy-storing position is separated from pusher surface 36, leaving space for interlock member 30 to move to the second position. In addition, drive shaft 23 is located above stop surface 34, and stop surface 34 is located on the closing rotation path of drive shaft 23. See Figure 6 Even if the control circuits of the opening and closing mechanisms 10 and 20 malfunction, causing the telescopic rod 261 to extend, the release rods 262 and 263 will switch to the release position (also known as the avoidance position) while the drive shaft 13 is still in the closed state. The drive pin 23 will not switch to the closed state because it is blocked by the stop surface 34.

[0054] See Figure 4 The control circuit extends the telescopic rod 161, causing the release rods 162 and 163 to switch to the release position. Simultaneously, the two main springs 15 release energy, driving the drive shaft 13 to rotate in a tripping motion, disengaging the lock part 31. After the two main springs 15 release energy, the control circuit retracts the telescopic rod 161, and the release rods 162 and 163 switch to their respective stop positions. At this time, the first part 1211 of the drive member 12 passes over the release rod 162, and the second part 1212 passes over the release rod 163 but does not pass over the release rod 162. The second part 1222, for example, abuts against the tangential surface of the half-shaft structure of the release rod 162, and the drive shaft 13 moves to the tripping limit position. During its rotation towards the tripping limit position, the drive shaft 13 can abut against the push surface 35, pushing the interlocking member 30 to the second position. At this time, the stop surface 34 exits the closing rotation path of the drive shaft 23.

[0055] See Figure 5 When the interlocking member 30 moves to the second position, the control circuit controls the extension rod 261 to extend, causing the release rods 262 and 263 to switch to the release position. Simultaneously, the two main springs 25 release energy, driving the drive shaft 23 to rotate in a closing position, causing the drive shaft 23 to switch to the closing state coupled with the locking part 32. After the two main springs 25 have released energy, the control circuit controls the extension rod 261 to retract, and the release rods 262 and 263 switch to the stop position. At this time, the first part 2211 of the drive member 22 is clamped between the first stop part of the release rod 262 and the second stop part of the release rod 263.

[0056] The process of switching drive shaft 23 from the closed state to the open state and drive shaft 13 from the open state to the closed state can be referred to the description above regarding the process of switching drive shaft 13 from the closed state to the open state and drive shaft 23 from the open state to the closed state, and will not be described in detail here.

[0057] In some embodiments, the fit clearance between one elongated hole 301 and the corresponding pivot 11 can be referred to as the first fit clearance, and the fit clearance between another elongated hole 301 and the corresponding pivot 21 can also be referred to as the first fit clearance. When the positioning groove of the locking part 31 is coupled with the corresponding drive shaft 13, the fit clearance between them can be referred to as the second fit clearance. When the positioning groove of the locking part 32 is coupled with the corresponding drive shaft 23, the fit clearance between them can also be referred to as the second fit clearance. The second fit clearance is greater than the first fit clearance. In this way, when the drive shaft 13 or drive shaft 23 switches to the closed state, the impact force between the drive shaft 13 or drive shaft 23 and the interlocking member 30 can be transferred to the frame of the dual power supply transfer switch 100 through the pivots 11 and 21, thereby reducing the adverse effects of the impact force on each opening and closing mechanism.

[0058] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A dual-power transfer switch, characterized in that, include: Two opening and closing mechanisms (10, 20), each of the opening and closing mechanisms (10, 20) comprising: Pivot (11,21); Drive elements (12, 22) adapted to rotate about the pivot (11, 21); and A drive shaft (13, 23) is mounted on the drive member (12, 22) to drive the moving contact support to rotate. The drive shaft (13, 23) has an open state and a closed state, and when the drive shaft (13) of one of the opening / closing mechanisms (10) is in the closed state, the drive shaft (23) of the other opening / closing mechanism (20) is in the open state. An interlocking element (30), adapted to move between a first position and a second position, the interlocking element (30) comprising two locking parts (31, 32), and When the interlock (30) is in the first position, one of the two locking parts (31, 32), locking part (31), is coupled to the drive shaft (13) in the closed state to restrict the interlock (30) in the first position, and the interlock (30) is located on the closing rotation path of the drive shaft (23) in the open state, and When the drive shaft (13) in the closed state switches to the open state, it is adapted to push the interlock member (30) to move from the first position to the second position, so that the interlock member (30) moves out of the closing rotation path of the drive shaft (23) in the open state, so as to allow the drive shaft (23) in the open state to couple with the other locking part (32) of the two locking parts (31, 32).

2. The dual power supply transfer switch according to claim 1, characterized in that, The interlocking element (30) is adapted to move in a direction parallel to the center line (M) connecting the pivots (11, 21) of the two opening and closing mechanisms (10, 20).

3. The dual power supply transfer switch according to claim 1, characterized in that, The interlocking component (30) is provided with two elongated holes (301), which are slidably engaged with the pivots (11, 21) of the two opening and closing mechanisms (10, 20).

4. The dual power supply transfer switch according to claim 1, characterized in that, The two locking parts (31, 32) are located at both ends of the interlocking member (30).

5. The dual power supply transfer switch according to any one of claims 1 to 4, characterized in that, Each of the locking parts (31, 32) includes a positioning groove with an opening for the corresponding drive shaft (13, 23) to enter or exit the positioning groove.

6. The dual power supply transfer switch according to claim 5, characterized in that, The interlock component (30) is provided with two elongated holes (301), which are slidably engaged with the pivots (11, 21) of the two opening and closing mechanisms (10, 20), respectively. A first fitting clearance is formed between each elongated hole (301) and the corresponding pivot (11, 21). When the positioning groove and the drive shaft in the closed state are coupled, a second fitting gap is formed between the positioning groove and the drive shaft, and the second fitting gap is greater than the first fitting gap.

7. The dual power supply transfer switch according to claim 5, characterized in that, The interlocking component (30) also includes two stop surfaces (33, 34) adjacent to the two locking parts (31, 32). Each stop surface (33, 34) is located on one side of the opening of the positioning groove of the corresponding locking part (31, 32), and one of the two stop surfaces (33, 34) is located on the closing rotation path of the drive shaft (23) in the open state.

8. The dual power supply transfer switch according to claim 7, characterized in that, The interlock (30) further includes two push surfaces (35, 36) adjacent to the two locking parts (31, 32), each push surface (35, 36) being located on the other side of the opening of the positioning groove of the corresponding locking part (31, 32), and one of the two push surfaces (35, 36) being located on the opening rotation path of the drive shaft (13) in the closed state, so as to be pushed by the drive shaft (13) switching from the closed state to the open state, so as to switch the interlock (30) between the first position and the second position.

9. The dual power supply transfer switch according to claim 8, characterized in that, Each of the positioning grooves is an arc-shaped groove, and each of the pushing surfaces (35, 36) is an inclined surface.

10. The dual power supply transfer switch according to claim 8, characterized in that, When the drive shaft (13, 23) is in the open state, the drive shaft (13, 23) has an open limit position and a closed energy storage position, and At the tripped limit position, the drive shaft (13, 23) abuts against the corresponding push surface (35, 36), and In the closed energy storage position, the drive shaft (13, 23) is separated from the corresponding push surface (35, 36) to allow the interlock (30) to be pushed.

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