Dual power transfer switch
By introducing interlocking components and locking mechanisms into the dual power transfer switch, the short circuit problem caused by malfunction of the contact assembly is solved, achieving higher electrical safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SCHNEIDER ELECTRIC IND SAS
- Filing Date
- 2025-07-16
- Publication Date
- 2026-07-14
AI Technical Summary
Existing dual-power transfer switches may cause both contact components to be in a closed state simultaneously during a power failure, resulting in a short circuit and affecting electrical safety.
By introducing interlocking components and locking mechanisms into the dual power transfer switch, each contact assembly is mechanically interlocked when in the closed state, preventing the other contact assembly from malfunctioning, thus forming a power interlock and preventing both contact assemblies from being in the closed state at the same time.
It effectively improves the electrical safety of dual power supply transfer switches, prevents malfunction of contact components, and avoids short circuit accidents.
Smart Images
Figure CN224501739U_ABST
Abstract
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 typically 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 and closing mechanisms and an interlocking element. Each opening and closing mechanism includes: a drive shaft adapted to drive a moving contact support to rotate and having an open state and a closed state; a release device including a release lever assembly having an unlocked position and a locked position, wherein in the unlocked position, the release lever assembly allows the drive shaft to switch between the open state and the closed state; and a locking mechanism adapted to abut against the release lever assembly to hold the release lever assembly in a locked position to restrict the switching of the drive shaft between the open state and the closed state; and an interlocking element adapted to move between a first position and a second position, the interlocking element including two locking portions, wherein when the interlocking element is in the first position, the two locking portions... One locking part is coupled to a drive shaft in the closed state to restrict the interlocking member to a first position, and the other locking part is separated from the other drive shaft in the open state. When the drive shaft in the closed state switches to the open state, it is adapted to push the interlocking member from the first position to the second position so that the interlocking member pushes the latching mechanism corresponding to the drive shaft in the open state to disengage from the corresponding release lever group, thereby allowing the release lever group corresponding to the drive shaft in the open state to switch to the unlock position so that the drive shaft in the open state can be coupled to the other locking part of the two locking parts.
[0005] In some embodiments, each opening and closing mechanism further includes: a pivot; and a drive member, the first end of which is pivotally connected to the pivot, the drive shaft being disposed between the first end and the second end of the drive member; and an interlock member 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 release lever assembly includes: a first release lever pivotable about its own axis and provided with a first stop portion; and a second release lever pivotable about its own axis, parallel to the first release lever and including a second stop portion, wherein the first release lever is adapted to be held in the first stop position by a first torsion spring, and the second release lever is adapted to be held in the second stop position by a second torsion spring, so that the release lever assembly is held in a locked position and the first stop portion and the second stop portion are located on the rotational trajectory of the second end of the drive member; and the release device further includes a telescopic rod adapted to push the first release lever to a first clearance position and the second release lever to a second clearance position, so that the release lever assembly is switched to an unlocked position and the first stop portion and the second stop portion are moved out of the rotational trajectory of the second end of the drive member.
[0007] In some embodiments, a protrusion is provided on the outer peripheral wall of one of the first and second release levers, and the locking mechanism is adapted to abut against the protrusion to hold the release lever assembly in a locked position.
[0008] In some embodiments, when the drive shaft is in the open state, a portion of the second end of the drive member can rotate between the first stop and the second stop to allow the drive shaft to rotate from the open limit position to the closed energy storage position.
[0009] In some embodiments, the interlocking component further includes two sliding grooves, which are respectively slidably engaged with the first release levers of the two opening and closing mechanisms, or the two sliding grooves are respectively slidably engaged with the second release levers of the two opening and closing mechanisms.
[0010] In some embodiments, each locking mechanism further includes: a locking member, pivotally connected to a mounting shaft and including a locking position and an unlocking position, wherein in the locking position, the locking member abuts against a release lever assembly to restrict the release lever assembly from switching from a locked position to an unlocked position, and in the unlocking position, the locking member disengages from the release lever assembly to allow the release lever assembly to switch from a locked position to an unlocked position; and a retainer adapted to apply an elastic force to the locking member to hold the locking member in the locking position.
[0011] In some embodiments, the middle portion of the locking member is pivotally connected to the mounting shaft, the first end of the locking member is adapted to abut against the release lever assembly and the line of action of the pressure from the release lever assembly on the first end of the locking member passes through the axis of the mounting shaft, and the second end of the locking member abuts against the retainer and is adapted to be pushed by the interlocking member.
[0012] In some embodiments, each locking part includes a positioning groove, the positioning groove including an opening for the corresponding drive shaft to enter or leave the positioning groove; the interlocking member also includes two pushing surfaces adjacent to the two locking parts, each pushing surface being located on one side of the opening of the positioning groove of the corresponding locking part, and one of the two pushing surfaces being located on the opening rotation path of the drive shaft in the closed state.
[0013] In some embodiments, the interlocking member further includes two pushing parts adjacent to the two pushing surfaces, each pushing part being adapted to push the corresponding locking mechanism.
[0014] In embodiments according to this disclosure, when the contact assembly corresponding to one closing / opening mechanism is in the closed state, the release lever group of another closing / opening mechanism corresponding to the contact assembly in the open state is mechanically interlocked and held in a locked position by the corresponding locking mechanism, so as not to allow the drive shaft of the other closing / opening mechanism to drive the moving contact support of the contact assembly in the open state to perform a closing movement. When the moving contact support of the contact assembly in the closed state is driven by the drive shaft of the corresponding closing / opening mechanism to perform a closing movement, the interlocking member is pushed by the drive shaft of the closing / opening mechanism that drives the moving contact support to perform a closing movement and moves between a first position and a second position. The movement of the interlocking member pushes the locking mechanism of the closing / opening mechanism corresponding to the contact assembly in the open state to actuate so that it no longer abuts against the corresponding release lever group, thereby allowing the release lever group of the closing / opening mechanism corresponding to the contact assembly in the open state to switch to the unlocked position, and thus allowing the drive shaft of the closing / opening mechanism corresponding to the contact assembly in the open state to drive the corresponding moving contact support to perform a closing movement. Therefore, the dual power transfer switch provided in this embodiment forms a power interlock through the locking mechanism and interlocking components of each opening and closing mechanism, effectively preventing the two contact assemblies of the dual power transfer switch from being in a closed state at the same time, thereby improving the power 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 transfer switch according to some embodiments of the present disclosure is shown for ease of explanation. Figure 1 The locking mechanism and interlocking components are not shown in the diagram.
[0018] Figure 2 and Figure 3 Perspective views of a dual power transfer switch according to some embodiments of the present disclosure are shown from different angles for ease of explanation. Figures 2 to 3 The telescopic rods of the release devices for each opening and closing mechanism are not shown in the diagram; and
[0019] Figures 4 to 7 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 4 to 7 The telescopic rods of the release devices for each opening and closing mechanism are not shown in the diagram. 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, when the contact assembly corresponding to one opening / closing mechanism is in the closed state, the release lever group of the other opening / closing mechanism corresponding to the contact assembly in the open state is held in a locked position by a corresponding locking mechanism through mechanical interlocking, so as not to allow the drive shaft of the other opening / closing mechanism to drive the moving contact support of the contact assembly in the open state to perform a closing movement. When the moving contact support of the contact assembly in the closed state is driven by the drive shaft of the corresponding opening / closing mechanism to perform a opening movement, the interlocking member is pushed by the drive shaft of the opening / closing mechanism that drives the moving contact support to perform the opening movement and moves between a first position and a second position. The movement of the interlocking member pushes the locking mechanism of the opening / closing mechanism corresponding to the contact assembly in the open state to actuate so that it no longer abuts against the corresponding release lever group, thereby allowing the release lever group of the opening / closing mechanism corresponding to the contact assembly in the open state to switch to the unlocked position, and thus allowing the drive shaft of the opening / closing mechanism corresponding to the contact assembly in the open state to drive the corresponding moving contact support to perform a closing movement. Therefore, the dual power transfer switch provided in this embodiment forms a power interlock through the locking mechanism and interlocking components of each opening and closing mechanism, effectively preventing both contact assemblies of the dual power transfer switch from being in a closed state simultaneously, thereby improving the electrical safety of the dual power transfer switch. In the following, [further details will be provided in conjunction with...] Figures 1 to 7 The principles of this disclosure are described.
[0024] Figure 1 A schematic diagram of a dual power supply transfer switch 100 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 and individual locking mechanisms are not shown. Figure 2 and Figure 3 Perspective views of a dual power transfer switch 100 according to some embodiments of the present disclosure are shown from different angles. Figures 4 to 7 A schematic diagram illustrating the normal switching process of the two opening and closing mechanisms of a dual-power transfer switch 100 according to some embodiments of the present disclosure is shown. For ease of explanation, Figures 2 to 7 The telescopic rods of the release devices for each opening and closing mechanism are not shown in the diagram.
[0025] See Figures 1 to 3 The dual-power transfer switch 100 includes two opening and closing mechanisms and an interlocking component 30. The two opening and closing mechanisms are opening and closing mechanism 10 and opening and closing mechanism 20. Each opening and closing mechanism is used to drive the moving contact support of the corresponding contact assembly to perform opening rotation or closing rotation, so that the corresponding contact assembly switches to the opening state or the closing state.
[0026] 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 main springs 15, an unlocking device 16, and a locking mechanism 17.
[0027] In some embodiments, see Figure 1 The mounting base 14 is mounted on the frame (not shown in the figure) of the dual power transfer switch 100 via a pivot 11 at its center. The first end (not labeled in the figure) of the drive member 12 is pivotally connected to the pivot 11 to facilitate rotation about the pivot 11. The drive shaft 13 is disposed between the first end and the second end 122 of the drive member 12, and the drive shaft 13 is spaced a certain distance from the pivot 11. The drive shaft 13 is connected to the moving contact bracket, for example, via a crank arm (not shown in the figure) or other suitable structure. The drive shaft 13 rotates about the pivot 11 with the drive member 12 to drive the moving contact bracket and the moving contact located on the moving contact bracket to perform opening or closing rotation.
[0028] In some embodiments, see Figure 1 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 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 open or close.
[0029] In some embodiments, the drive shaft 13 includes a closed state (see...). Figure 4 and Figure 5 ) and tripped status (see Figure 6 and Figure 7 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] In some embodiments, in conjunction with reference Figure 1 and Figure 5 The second end 122 of the drive member 12 cooperates with the release device 16 to allow the two main springs 15 to remain in the stored state. In some embodiments, the release device 16 includes a telescopic rod 161 and a release rod assembly 160. In some embodiments, the release rod assembly 160 includes two release rods (a first release rod 162 and a second release rod 163) that are parallel to each other. The first release rod 162 is rotatable about its own axis between a first stop position and a first clearance position. The second release rod 163 is rotatable about its own axis between a second stop position and a second clearance position.
[0031] In some embodiments, see Figure 3The first unlocking lever 162 is provided with a first stop portion 1621, and the second unlocking lever 163 is provided with a second stop portion 1631. In some embodiments, the stop portions (first stop portion 1621 and second stop portion 1631) of the first unlocking lever 162 and the second unlocking lever 163 may each include a half-shaft structure, that is, a section is formed on a portion of the outer peripheral wall of each unlocking lever instead of a complete circle.
[0032] In some embodiments, the first release lever 162 includes a first stop position and a first clearance position. The first release lever 162 can be held in the first stop position by the action of a first torsion spring (not shown in the figure), so that the first stop portion 1621 is located on the rotation trajectory of the second end 122 of the drive member 12. The second release lever 163 includes a second stop position and a second clearance position. The second release lever 163 can be held in the second stop position by the action of a second torsion spring (not shown in the figure), so that the second stop portion 1631 is located on the rotation trajectory of the second end 122 of the drive member 12. When the first release lever 162 is in the first stop position and the second release lever 163 is in the second stop position, it corresponds to the locked position of the release lever assembly 160. It can be understood that when the release lever assembly 160 is in the locked position, the second end 122 of the drive member 12 cannot pass over any release lever, thus restricting the switching of the drive shaft 13 between the open and closed states.
[0033] In some embodiments, see Figure 1 The first unlocking rod 162 has a radial protrusion 1622, and the second unlocking rod 163 has a radial protrusion 1632. The telescopic rod 161 is used to abut against the radial protrusions 1622 and 1632. When the telescopic rod 161 extends, by applying force to the two radial protrusions (radial protrusions 1622 and 1632), the first unlocking rod 162 rotates around its own axis to a first clearance position, and the second unlocking rod 163 rotates around its own axis to a second clearance position. At this time, the half-shaft structure of the first unlocking rod 162 and the second unlocking rod 163 makes room for the rotation of the second end 122 of the driving member 12, and causes the first stop 1621 and the second stop 1631 to move out of the rotation trajectory of the second end 122 of the driving member 12, thereby allowing the second end 122 of the driving member 12 to pass over either unlocking rod. In some embodiments, the extension and retraction of the telescopic rod 161 can be driven by electromagnetic force and spring force. When the first release rod 162 is in the first clearance position and the second release rod 163 is in the second clearance position, it corresponds to the unlocked position of the release rod assembly 160. It can be understood that when the release rod assembly 160 is in the unlocked position, the second end 122 of the drive member 12 can pass over either release rod, thereby allowing the drive shaft 13 to switch between the open and closed states.
[0034] See back Figure 1In some embodiments, the second end 122 of the drive member 12 includes a first portion 1221 and a second portion 1222, which are generally V-shaped. In some embodiments, when the drive shaft 13 is in the closed state, the first portion 1221 is clamped by the first stop portion 1621 of the first release lever 162 and the second stop portion 1631 of the second release lever 163. When the drive shaft 13 is in the open state, the second portion 1222 is located between the first stop portion 1621 and the second stop portion 1631, and the second portion 1222 is rotatable between the first stop portion 1621 and the second stop portion 1631, so that the drive shaft 13 in the open state can rotate from the open limit position to the closed energy storage position.
[0035] In some embodiments, see Figure 7 The locking mechanism 17 abuts against the release lever assembly 160 to hold the release lever assembly 160 in a locked position. In some embodiments, a protrusion 1623 is provided on the outer peripheral wall of the first release lever 162. In some embodiments, the protrusion 1623 protrudes radially outward relative to the outer peripheral wall of the first release lever 162. In some embodiments, the protrusion 1623 may also extend circumferentially by a certain length. In some alternative embodiments, the protrusion 1623 may alternatively be provided on the second release lever 163. The locking mechanism 17 may abut against the corresponding protrusion 1623 to apply torque to the first release lever 162, thereby preventing the first release lever 162 from rotating from the first stop position to the first clearance position. Because the first unlocking lever 162 is blocked by the locking mechanism 17 and cannot rotate to the first clearance position, the telescopic lever 161 is blocked by the radial protrusion 1622 on the first unlocking lever 162 and cannot extend. Therefore, the telescopic lever 161 cannot push the radial protrusion 1632 to make the second unlocking lever 163 rotate to the second clearance position.
[0036] In some embodiments, the locking mechanism 17 includes a locking member 171 and a retaining member 173. The locking member 171 is pivotally connected to the mounting shaft 172, and the locking member 171 can rotate about the mounting shaft 172 to the locking position. Figure 7 ) or release position ( Figure 4 In the locked position, the locking member 171 abuts against the corresponding protrusion 1623 of the release lever assembly 160 to prevent the release lever assembly 160 from switching from the locked position to the unlocked position. In the unlocked position, the locking member 171 disengages from the corresponding protrusion 1623 of the release lever assembly 160 to allow the release lever assembly 160 to switch from the locked position to the unlocked position. The retainer 173 is adapted to apply a resilient force to the locking member 171 to hold the locking member 171 in the locked position. In some embodiments, the retainer 173 is compressed by a spring 174 to apply a resilient force to the locking member 171.
[0037] See Figure 7 In some embodiments, the middle portion of the locking mechanism 171 is pivotally connected to a mounting shaft 172, which may be fixed to a frame, for example. A first end of the locking member 171 is adapted to abut against a corresponding protrusion 1623. When the first end of the locking member 171 abuts against the protrusion 1623, the line of action of the pressure exerted on the first end of the locking member 171 by the protrusion 1623 of the release lever assembly 160 passes through the axis of the mounting shaft 172. Therefore, the pressure exerted by the release lever assembly 160 on the locking member 171 through the protrusion 1623 does not push the locking member 171 to rotate, and the release lever assembly 160 is thus held in the locked position.
[0038] Of course, in some alternative embodiments, the locking mechanism 17 may also have other suitable implementations, as long as it can abut against any of the release levers of the release lever assembly 160 as needed to hold the release lever assembly 160 in the locked position, and can release the position lock of any release lever under the push of the interlocking member 30 described below.
[0039] The opening and closing mechanism 20 includes a pivot 21, a drive component 22, a drive shaft 23, a mounting base 24, two main springs 25, an unlocking device 26, and a locking mechanism 27.
[0040] In some embodiments, the opening and closing mechanism 20 and the opening and closing mechanism 10 have substantially the same structure. The structure and function of the various components of the opening and closing mechanism 20 and the connection relationship between the different components can be referred to the description above regarding the structure and function of the various components of the opening and closing mechanism 10 and the connection relationship between the different components.
[0041] Specifically, in some embodiments, see [link to relevant documentation]. Figure 1 The mounting base 24 is mounted on the frame (not shown) of the dual power transfer switch 100 via a pivot 21 at its center. The first end (not labeled) of the drive member 22 is pivotally connected to the pivot 21 to accommodate rotation about the pivot 21. A drive shaft 23 is positioned between the first and second ends 222 of the drive member 22, with a certain distance between the drive shaft 23 and the pivot 21. The drive shaft 23 is connected to the moving contact bracket, for example, via a crank arm (not shown) or other suitable structure. The drive shaft 23 rotates around the pivot 21 with the drive member 22 to drive the moving contact bracket and the moving contact located on the moving contact bracket to perform opening or closing rotation.
[0042] In some embodiments, see Figure 1Two main spring support rods 251 are pivotally connected to both sides of the mounting base 24 via two push pins 241. Two main springs 25 are sleeved on the two main spring support rods 251. The mounting base 24 can rotate clockwise or counterclockwise under the action of external force to store energy in the two main springs 25. When the two main springs 25 release energy, one of the push pins 241 pushes the corresponding side of the driving member 22, causing the driving member 22 to rotate around the pivot 21, thereby causing the driving shaft 23 to drive the moving contact bracket to rotate to open or close the circuit.
[0043] In some embodiments, the drive shaft 23 includes a closed state (see...). Figure 7 ) and tripped status (see Figures 4 to 6 The closing state of drive shaft 23 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 23 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.
[0044] In some embodiments, in conjunction with reference Figure 1 , Figure 5 and Figure 6 The second end 222 of the drive member 22 cooperates with the release device 26 to allow the two main springs 25 to remain in the stored state. In some embodiments, the release device 26 includes a telescopic rod 261 and a release rod assembly 260. In some embodiments, the release rod assembly 260 includes two release rods (a first release rod 262 and a second release rod 263) that are parallel to each other. The first release rod 262 is rotatable about its own axis between a first stop position and a first clearance position. The second release rod 263 is rotatable about its own axis between a second stop position and a second clearance position.
[0045] In some embodiments, see Figure 3 The first unlocking lever 262 is provided with a first stop portion 2621, and the second unlocking lever 263 is provided with a second stop portion 2631. In some embodiments, the stop portions (first stop portion 2621 and second stop portion 2631) of the first unlocking lever 262 and the second unlocking lever 263 may each include a half-shaft structure, that is, a section is formed on a portion of the outer peripheral wall of each unlocking lever instead of a complete circle.
[0046] In some embodiments, the first release lever 262 includes a first stop position and a first clearance position. The first release lever 262 can be held in the first stop position by the action of a first torsion spring (not shown in the figure), so that the first stop portion 2621 is located on the rotation trajectory of the second end 222 of the drive member 22. The second release lever 263 includes a second stop position and a second clearance position. The second release lever 263 can be held in the second stop position by the action of a second torsion spring (not shown in the figure), so that the second stop portion 2631 is located on the rotation trajectory of the second end 222 of the drive member 22. When the first release lever 262 is in the first stop position and the second release lever 263 is in the second stop position, it corresponds to the locked position of the release lever assembly 260. It can be understood that when the release lever assembly 260 is in the locked position, the second end 222 of the drive member 22 cannot pass over any release lever, thus restricting the switching of the drive shaft 23 between the open and closed states.
[0047] In some embodiments, see Figure 1 The first unlocking rod 262 has a radial protrusion 2622, and the second unlocking rod 263 has a radial protrusion 2632. The telescopic rod 261 is used to abut against the radial protrusions 2622 and 2632. When the telescopic rod 261 extends, by applying force to the two radial protrusions (radial protrusions 2622 and 2632), the first unlocking rod 262 rotates around its own axis to a first clearance position, and the second unlocking rod 263 rotates around its own axis to a second clearance position. At this time, the half-shaft structure of the first unlocking rod 262 and the second unlocking rod 263 makes room for the rotation of the second end 222 of the driving member 22, and causes the first stop 2621 and the second stop 2631 to move out of the rotation trajectory of the second end 222 of the driving member 22, thereby allowing the second end 222 of the driving member 22 to pass over either unlocking rod. In some embodiments, the extension and retraction of the telescopic rod 261 can be driven by electromagnetic force and spring force. When the first release rod 262 is in the first clearance position and the second release rod 263 is in the second clearance position, it corresponds to the unlocked position of the release rod assembly 260. It can be understood that when the release rod assembly 260 is in the unlocked position, the second end 222 of the drive member 22 can pass over either release rod, thereby allowing the drive shaft 23 to switch between the open and closed states.
[0048] See back Figure 1In some embodiments, the second end 222 of the drive member 22 includes a first portion 2221 and a second portion 2222, which are generally V-shaped. In some embodiments, when the drive shaft 23 is in the closed state, the first portion 2221 is clamped by the first stop portion 2621 of the first release lever 262 and the second stop portion 2631 of the second release lever 263. When the drive shaft 23 is in the open state, the second portion 2222 is located between the first stop portion 2621 and the second stop portion 2631, and the second portion 2222 is rotatable between the first stop portion 2621 and the second stop portion 2631, so that the drive shaft 23 in the open state can rotate from the open limit position to the closed energy storage position.
[0049] In some embodiments, see Figure 4 The locking mechanism 27 abuts against the release lever assembly 260 to hold the release lever assembly 260 in a locked position. In some embodiments, a protrusion 2623 is provided on the outer peripheral wall of the first release lever 262. In some embodiments, the protrusion 2623 protrudes radially outward relative to the outer peripheral wall of the first release lever 262. In some embodiments, the protrusion 2623 may also extend circumferentially by a certain length. In some alternative embodiments, the protrusion 2623 may alternatively be provided on the second release lever 263. The locking mechanism 27 may abut against the corresponding protrusion 2623 to apply torque to the first release lever 262, thereby preventing the first release lever 262 from rotating from the first stop position to the first clearance position. Because the first unlocking lever 262 is blocked by the locking mechanism 27 and cannot rotate to the first clearance position, the telescopic lever 261 is blocked by the radial protrusion 2622 on the first unlocking lever 262 and cannot extend. Therefore, the telescopic lever 261 cannot push the radial protrusion 2632 to make the second unlocking lever 263 rotate to the second clearance position.
[0050] In some embodiments, the locking mechanism 27 includes a locking member 271 and a retaining member 273. The locking member 271 is pivotally connected to the mounting shaft 272, and the locking member 271 can rotate about the mounting shaft 272 to the locking position. Figure 4 ) or release position ( Figure 6 In the locked position, the locking member 271 abuts against the corresponding protrusion 2623 of the release lever assembly 260 to prevent the release lever assembly 260 from switching from the locked position to the unlocked position. In the unlocked position, the locking member 271 disengages from the corresponding protrusion 2623 of the release lever assembly 260 to allow the release lever assembly 260 to switch from the locked position to the unlocked position. The retainer 273 is adapted to apply a resilient force to the locking member 271 to hold the locking member 271 in the locked position. In some embodiments, the retainer 273 is compressed by a spring 274 to apply a resilient force to the locking member 271.
[0051] See Figure 4 In some embodiments, the middle portion of the locking mechanism 271 is pivotally connected to a mounting shaft 272, which may be fixed to a frame, for example. A first end of the locking member 271 is adapted to abut against a corresponding protrusion 2623. When the first end of the locking member 271 abuts against the protrusion 2623, the line of action of the pressure exerted on the first end of the locking member 271 by the protrusion 2623 of the release lever assembly 260 passes through the axis of the mounting shaft 272. Therefore, the pressure exerted by the release lever assembly 260 on the locking member 271 through the protrusion 2623 does not push the locking member 271 to rotate, and the release lever assembly 260 is thus held in the locked position.
[0052] Of course, in some alternative embodiments, the locking mechanism 27 may also have other suitable implementations, as long as it can abut against any of the release levers of the release lever assembly 260 as needed to hold the release lever assembly 260 in the locked position, and can be released from the position lock of any release lever by the push of the interlocking member 30 described below.
[0053] As described above, 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. When one of drive shafts 13 and 23 is in the closed state, the other should be in the open state. Figures 2 to 7 In the dual power transfer switch shown, Figures 2 to 5 The drive shaft 13 of the opening and closing mechanism 10 is in the closed state, and the drive shaft 23 of the opening and closing mechanism 20 is in different positions in the open state. Figure 6 The drive shaft 13 of the opening and closing mechanism 10 and the drive shaft 23 of the opening and closing mechanism 20 are both in the open state. Figure 7 The opening and closing mechanism 10 is in the open state, and the drive shaft 23 is in the closed state.
[0054] In some embodiments, see Figure 4 and Figure 6 The interlocking member 30 can move between a first position and a second position. In some embodiments, Figure 4 and Figure 5 The position of the interlock component 30 can be referred to as the first position. Figure 6 and Figure 7 The position of the interlocking component 30 can be referred to as the second position.
[0055] In some embodiments, the interlock member 30 includes two locking parts, namely locking part 31 and locking part 32. See also Figure 4 and Figure 5In 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 171 of the latching mechanism 17 is pushed by the interlock 30 to disengage from the protrusion 1623 of the corresponding release lever assembly 160. The locking part 32 separates from the drive shaft 23 in the open state, and the locking part 271 of the latching mechanism 27 abuts against the protrusion 2623 of the release lever assembly 260, thereby holding the release lever assembly 260 in the locked position.
[0056] See Figure 5 and Figure 6 When the drive shaft 13 switches to the open state, it pushes the interlock member 30 from the first position to the second position, causing the locking member 271 of the locking mechanism 27 to be pushed by the interlock member 30 and disengage from the protrusion 2623 of the corresponding release lever assembly 260. Therefore, the locking mechanism 27 does not restrict the release lever assembly 260 from switching to the unlocked position; the release lever assembly 260 can switch to the unlocked position under the drive of the telescopic rod 261, thereby allowing the drive shaft 23 to switch to the closed state to couple with the locking part 32.
[0057] See Figure 7 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 to restrict interlocking member 30 to the second position. At this time, latching member 171 is held in the latching position abutting against the protrusion 1623 of release lever assembly 160 by the elastic force of retaining member 173, thereby holding release lever assembly 160 in the locked position.
[0058] It is understandable that when the drive shaft 23 switches from the closed state to the open state, the drive shaft 23 can push the interlock component 30 to move from the second position to the first position. When the interlock component 30 moves to the first position, the dual power supply transfer switch 100 returns to its original position. Figure 1 The state shown.
[0059] As described above, in the dual-power transfer switch 100 provided in this embodiment, when the contact assembly corresponding to the opening and closing mechanism 10 is in the closed state, the release lever group 260 of the opening and closing mechanism 20 corresponding to the contact assembly in the open state is held in a locked position by the locking mechanism 27 through mechanical interlocking, so as not to allow the drive shaft 23 of the opening and closing mechanism 20 to drive the moving contact support of the contact assembly in the open state to perform a closing movement. When the moving contact support of the contact assembly in the closed state is driven by the drive shaft 13 of the opening and closing mechanism 10 to perform a opening movement, the interlocking member 30 is pushed by the drive shaft 13 of the opening and closing mechanism 10 to move between the first position and the second position. The movement of the interlocking member 30 pushes the locking mechanism 27 of the opening and closing mechanism 20 to actuate so that it no longer abuts against the release lever group 260, thereby allowing the release lever group 260 to switch to the unlocked position, and thus allowing the drive shaft 23 of the opening and closing mechanism 20 to drive the corresponding moving contact support to perform a closing movement. Therefore, the dual power transfer switch 100 provided in this embodiment forms a power interlock through the locking mechanism and interlocking components of each opening and closing mechanism, effectively preventing the two contact assemblies of the dual power transfer switch 100 from being in the closed state at the same time, thereby improving the power safety of the dual power transfer switch.
[0060] See Figures 4 to 7 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 sliding grooves, namely sliding groove 301 and sliding groove 302. Sliding groove 301 can slide with the second unlocking lever 163, and sliding groove 302 can slide with the second unlocking lever 263. Thus, the movement of the interlocking member 30 in a direction parallel to the center line M can be easily achieved. Of course, in some alternative embodiments, the interlocking member 30 can also achieve movement in a direction parallel to the center line M through other implementation methods. For example, sliding groove 301 can slide with the first unlocking lever 162, and sliding groove 302 can slide with the second unlocking lever 262.
[0061] 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 allows 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 allows the corresponding drive shaft to leave the positioning groove.
[0062] In some embodiments, the interlock member 30 may further include a push surface 33 adjacent to the locking part 31, the push surface 33 being located on one side of the opening of the positioning groove of the locking part 31. In some embodiments, the push surface 33 may be an inclined surface. When the drive shaft 13 is in the closed state, the push surface 33 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 33 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 34 adjacent to the locking part 32, the push surface 34 being located on one side of the opening of the positioning groove of the locking part 32. In some embodiments, the push surface 34 may be an inclined surface. When the drive shaft 23 is in the closed state, the push surface 34 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 34 to switch the interlock member 30 between a first position and a second position.
[0063] In some embodiments, the interlocking member 30 may further include a pushing portion 35 adjacent to the pushing surface 33 and a pushing portion 36 adjacent to the pushing surface 34. When the interlocking member 30 moves from the first position to the second position, the pushing portion 36 biases the locking member 271 of the locking mechanism 27, causing the locking member 271 to rotate to the unlocked position. When the interlocking member 30 moves from the second position to the first position, the pushing portion 35 biases the locking member 171 of the locking mechanism 17, causing the locking member 171 to rotate to the unlocked position.
[0064] 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.
[0065] The following is combined Figures 4 to 7 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.
[0066] See Figure 4 The interlocking member 30 is in the first position, and both the release lever assembly 160 and the release lever assembly 26 are in the locked position. The two main springs 15 have driven the drive shaft 13 to the closed state, and the first part 1221 of the drive member 12 is clamped by the first stop 1621 of the first release lever 162 and the second stop 1631 of the second 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 34. At this time, see... Figure 1When the opening and closing mechanism 20 performs the opening movement, the first part 2221 of the driving member 22 passes over the first release lever 262, and the second part 2222 passes over the second release lever 263 but does not pass over the first release lever 262. The second part 2222, for example, abuts against the cross-section of the half-shaft structure of the first release lever 262. At this time, the locking member 271 abuts against the protrusion 2623 under the action of the retaining member 273, and the locking member 171 is pushed by the pushing part 35 and separated from the protrusion 1623.
[0067] See Figure 5 An 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 essentially unchanged. Drive member 22 is pushed away from the cross-section of the first release lever 262 by the upper pusher 241 and can abut against the cross-section of the half-shaft structure of the second release lever 263. At this time, drive shaft 23 is in the open state, more specifically in the closed energy-storing position, in preparation for subsequent closed rotation. Drive shaft 23 in the closed energy-storing position separates from pusher surface 34, leaving space for interlock member 30 to move to the second position. At this time, the locking element 271 remains in the locking position abutting against the protrusion 2623. Even if the control circuits of the opening and closing mechanisms 10 and 20 malfunction, causing the telescopic rod 261 to extend and exert a force on the first release rod 262 and the second release rod 263 to rotate towards their respective avoidance positions, the first release rod 262 and the second release rod 263 will not rotate to their respective avoidance positions due to the obstruction of the locking element 271. Therefore, the drive shaft 23 cannot pass the second release rod 263 to perform a closing rotation and switch to the closing state. Thus, power interlocking is achieved through mechanical interlocking, preventing the contact assemblies of the two opening and closing mechanisms from being in the closing state simultaneously.
[0068] See Figure 6The control circuit extends the telescopic rod 161, causing the first release lever 162 and the second release lever 163 to switch to their respective avoidance positions. Simultaneously, the two main springs 15 release energy, driving the drive shaft 13 to rotate and disengage from the locking part 31. After the two main springs 15 release energy, the control circuit retracts the telescopic rod 161, and the first release lever 162 and the second release lever 163 switch to their respective stop positions. At this time, the first part 1221 of the drive member 12 passes over the first release lever 162, and the second part 1222 passes over the second release lever 163 but does not pass over the first release lever 162. The second part 1222, for example, abuts against the tangential surface of the half-shaft structure of the first release lever 162, and the drive shaft 13 moves to the limit position of the opening. During its rotation towards the limit position, the drive shaft 13 can abut against the push surface 33 and push the interlocking member 30 to the second position. At this time, the locking member 271 is pushed by the pushing part 36 and separated from the protrusion 2623, and the locking member 171 abuts against the protrusion 1623 under the action of the retaining member 173.
[0069] See Figure 7 When the interlocking member 30 moves to the second position, the control circuit controls the extension rod 261 to extend, causing the first release rod 262 and the second release rod 263 to switch to their respective clearance positions. Simultaneously, the two main springs 25 release energy, driving the drive shaft 23 to rotate in a closing manner, 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 their respective stop positions. At this time, the first part 2221 of the drive member 22 is clamped by the first stop part 2621 of the first release rod 262 and the second stop part 2631 of the second release rod 263.
[0070] 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.
[0071] In the dual-power transfer switch 100 provided in this embodiment, the interlocking component 30 and the release lever groups of each opening and closing mechanism cooperate with each other to achieve the technical effect that the contact assembly corresponding to one opening and closing mechanism is allowed to close only after the contact assembly corresponding to that mechanism has been fully opened, and it can avoid the accident where the other contact assembly has closed before the opened contact assembly has completed arc extinguishing. The dual-power transfer switch 100 provided in this embodiment achieves mechanical interlocking of dual power supplies through a simple structure. In addition, the interlocking is achieved by the abutment of the locking mechanism and the release lever group, which can prevent the impact of each main spring on the corresponding pivot 11 or pivot 21.
[0072] 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: The drive shaft (13,23) is suitable for driving the moving contact support to rotate and has an open state and a closed state; The release device (16, 26) includes a release lever assembly (160, 260) having an unlocked position and a locked position, wherein in the unlocked position, the release lever assembly (160, 260) allows the drive shaft (13, 23) to switch between the open state and the closed state; and A locking mechanism (17, 27) is adapted to abut against the release lever assembly (160, 260) to hold the release lever assembly (160, 260) in the locked position to restrict the switching of the drive shaft (13, 23) between the open state and the closed state; and 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 one of the drive shafts (13) in the closed state to restrict the interlock (30) in the first position, and the other locking part (32) is separated from the other drive shaft (23) in the open state. 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) pushes the latching mechanism (27) corresponding to the drive shaft (23) in the open state to disengage from the corresponding unlocking lever group (260), thereby allowing the unlocking lever group (260) corresponding to the drive shaft (23) in the open state to switch to the unlocking position, 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, Each of the opening and closing mechanisms (10, 20) further includes: Pivot (11,21); and A drive member (12, 22) has its first end pivotally connected to the pivot (11, 21), and a drive shaft (13, 23) is disposed between the first end and the second end (122, 222) of the drive member (12, 22); and 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 2, characterized in that, The release lever assembly (160, 260) includes: A first release lever (162, 262) pivotable about its own axis, provided with a first stop (1621, 2621); and A second release lever (163, 263) pivotable about its own axis is parallel to the first release lever (162, 262) and includes a second stop (1631, 2631). The first unlocking lever (162, 262) is adapted to be held in a first stop position by a first torsion spring, and the second unlocking lever (163, 263) is adapted to be held in a second stop position by a second torsion spring, so that the unlocking lever assembly (160, 260) is held in the locked position and the first stop portion (1621, 2621) and the second stop portion (1631, 2631) are located on the rotational trajectory of the second end (122, 222) of the drive member (12, 22); and The unfastening device (16, 26) further includes telescopic rods (161, 261), which are adapted to push the first unfastening rod (162, 262) to a first clearance position and push the second unfastening rod (163, 263) to a second clearance position, so that the unfastening rod assembly (160, 260) switches to the unlocked position and the first stop (1621, 2621) and the second stop (1631, 2631) move out of the rotation trajectory of the second end (122, 222) of the driving member (12, 22).
4. The dual power supply transfer switch according to claim 3, characterized in that, One of the first unlocking levers (162, 262) and the second unlocking levers (163, 263) has a protrusion (1623, 2623) on its outer peripheral wall. The locking mechanism (17, 27) is adapted to abut against the protrusion (1623, 2623) to hold the release lever assembly (160, 260) in the locked position.
5. The dual power supply transfer switch according to claim 3, characterized in that, When the drive shaft (13,23) is in the open state, a portion (1222,222) of the second end (122,222) of the drive member (12,22) can rotate between the first stop (1621,2621) and the second stop (1631,2631) to allow the drive shaft (13,23) to rotate from the open limit position to the closed energy storage position.
6. The dual power supply transfer switch according to claim 3, characterized in that, The interlocking component (30) further includes two sliding grooves (301, 302), which are respectively slidably engaged with the first release levers (162, 262) of the two opening and closing mechanisms (10, 20), or the two sliding grooves (301, 302) are respectively slidably engaged with the second release levers (163, 263) of the two opening and closing mechanisms (10, 20).
7. The dual power supply transfer switch according to any one of claims 1 to 6, characterized in that, Each of the locking mechanisms (17, 27) further includes: A locking element (171, 271), pivotally connected to a mounting shaft (172, 272), includes a locking position and an unlocking position. In the locking position, the locking element (171, 271) abuts against the unlocking lever assembly (160, 260) to restrict the unlocking lever assembly (160, 260) from switching from the locked position to the unlocked position. In the unlocking position, the locking element (171, 271) disengages from the unlocking lever assembly (160, 260) to allow the unlocking lever assembly (160, 260) to switch from the locked position to the unlocked position. The retainer (173, 273) is adapted to apply an elastic force to the locking member (171, 271) to keep the locking member (171, 271) in the locking position.
8. The dual power supply transfer switch according to claim 7, characterized in that, The middle portion of the locking element (171, 271) is pivotally connected to the mounting shaft (172, 272). The first end of the locking element (171, 271) is adapted to abut against the unlocking lever assembly (160, 260), and the line of action of the pressure from the unlocking lever assembly (160, 260) on the first end of the locking element (171, 271) passes through the axis of the mounting shaft (172, 272). The second end of the locking element (171, 271) abuts against the retainer (173, 273) and is adapted to be pushed by the interlocking element (30).
9. The dual power supply transfer switch according to any one of claims 1 to 6, characterized in that, Each of the locking parts (31, 32) includes a positioning groove, the positioning groove including an opening for the corresponding drive shaft (13, 23) to enter into or exit the positioning groove; The interlocking component (30) also includes two pushing surfaces (33, 34) adjacent to the two locking parts (31, 32). Each of the pushing surfaces (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 pushing surfaces (33, 34) is located on the opening rotation path of the drive shaft (13) in the closed state.
10. The dual power supply transfer switch according to claim 9, characterized in that, The interlocking member (30) also includes two pushing parts (35, 36) adjacent to the two pushing surfaces (33, 34), each of the pushing parts (35, 36) being adapted to push the corresponding locking mechanism (17, 27).