Dual power transfer switch

Abstract

The embodiment of the present disclosure provides a dual power transfer switch, comprising: a support; an opening and closing mechanism, comprising: a driving piece provided with a first hole; and a pivot, sleeved in the first hole and matched with the first hole in a non-rotatable manner, and the pivot is pivotally connected with the support to allow the driving piece to rotate in a closing direction or an opening direction around an axis of the pivot; and a buffer mechanism, comprising: an inertia wheel; and a one-way bearing, the inertia wheel is sleeved on the pivot through the one-way bearing, and the one-way bearing is configured to allow the inertia wheel to rotate together with the pivot when the driving piece rotates in the closing direction.

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, each comprising a stationary contact and a moving contact mounted on a moving contact bracket. The moving contact bracket is rotatable between an open and a closed position. When the moving contact bracket is in the open position, the moving contact is separated from the stationary contact, and the contact assembly is in the open state. When the moving contact bracket is in the closed position, the moving contact is in contact with the stationary contact, and the contact assembly is in the closed state. When one of the two contact assemblies is in the closed state, the other is in the open state, allowing either the primary power supply or the backup power supply to power the equipment. Summary of the Invention

[0004] This disclosure provides a dual-power transfer switch, comprising: a bracket; a closing / opening mechanism, comprising: a drive member having a first hole; and a pivot sleeved in the first hole and non-rotatably engaged with the first hole, wherein the pivot is pivotally connected to the bracket to allow the drive member to rotate around the axis of the pivot for closing or opening; and a buffer mechanism, comprising: an inertia wheel; and a one-way bearing, wherein the inertia wheel is sleeved on the pivot via the one-way bearing, and the one-way bearing is configured to allow the inertia wheel to rotate together with the pivot when the drive member performs a closing rotation.

[0005] In some embodiments, the wall of the first hole is provided with a first cross-section, the outer peripheral wall of the first end of the pivot is provided with a second cross-section, the first cross-section and the second cross-section cooperate to restrict the relative rotation of the drive member and the pivot; and the one-way bearing is sleeved on the second end of the pivot.

[0006] In some embodiments, the drive component is sleeved on the first end of the pivot, the one-way bearing is sleeved on the second end of the pivot, and the second end of the pivot is provided with an axial limiting structure for limiting the axial position of the one-way bearing and the inertia wheel on the pivot.

[0007] In some embodiments, the driving member is further provided with a second hole, and the opening and closing mechanism further includes an output shaft, which is sleeved in the second hole and connected to the moving contact bracket. When the driving member performs the closing rotation or the opening rotation, the output shaft drives the moving contact bracket to rotate so that the moving contact abuts or separates from the corresponding stationary contact.

[0008] In some embodiments, the dual power supply transfer switch is configured with two opening and closing mechanisms and two buffer mechanisms, with the one-way bearings of each buffer mechanism respectively mounted on the pivot of the corresponding opening and closing mechanism.

[0009] In some embodiments, the inertia wheels of the two buffer mechanisms have overlapping portions.

[0010] In some embodiments, the inertia wheel includes: a sleeve portion sleeved on the one-way bearing; and a first wheel body extending outward from the outer peripheral wall of the sleeve portion, wherein the thickness of the first wheel body is less than the axial length of the sleeve portion.

[0011] In some embodiments, the inertial wheel further includes at least one second wheel body sleeved on the sleeve portion, and in the first wheel body and the at least one second wheel body stacked together, a linkage structure is provided between each two adjacent wheel bodies. The linkage structure is configured such that when the drive member rotates in the closing direction, one of the two adjacent wheel bodies is allowed to rotate a predetermined angle in the closing direction and drive the other wheel body to rotate.

[0012] In some embodiments, the linkage structure includes: at least one first arcuate groove disposed on one of two adjacent wheel bodies; and at least one slider disposed on the other of two adjacent wheel bodies and slidingly engaging with the at least one first arcuate groove.

[0013] In some embodiments, an elastic reset member is provided between each pair of adjacent wheel bodies.

[0014] In the dual-power transfer switch provided in this embodiment, the drive component is non-rotatably connected to the pivot via a first hole, and the inertia wheel is sleeved on the pivot via a one-way bearing to increase the rotational inertia of the moving contact support during closing rotation. This helps to reduce the closing speed of the moving contact and the collision speed at the point of contact, reducing the impact force between the moving and stationary contacts at the moment of contact, thereby protecting the contact assembly. Furthermore, this additional rotational inertia is effective during closing but ineffective during opening, and does not affect the opening speed of the moving contact, thus improving the closing performance of the dual-power transfer switch without affecting its opening performance.

[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 perspective view of a portion of the structure of a dual power transfer switch according to some embodiments of the present disclosure is shown;

[0018] Figure 2 and Figure 3 It shows Figure 1 The diagram shows a dual power transfer switch from different perspectives, with the drive unit in the ready-to-close position.

[0019] Figure 4 and Figure 5 It shows Figure 1 The diagram shows a dual power transfer switch from different perspectives, with the drive element in the closing limit position.

[0020] Figure 6 It shows Figure 1 The diagram shows a dual power transfer switch, with the drive unit in the ready-to-open position.

[0021] Figure 7 It shows Figure 1 The diagram shows a dual power supply transfer switch with the drive element in the open limit position.

[0022] Figure 8 A perspective view of a portion of the structure of a dual power transfer switch provided according to some embodiments of the present disclosure is shown;

[0023] Figure 9 It shows Figure 8 Another three-dimensional schematic diagram of the dual power transfer switch is shown for ease of explanation. Figure 9 One switching mechanism and one buffer mechanism are omitted from the text.

[0024] Figure 10 It shows Figure 9 A partially exploded view of the opening and closing mechanism and the buffer mechanism shown in the figure;

[0025] Figure 11 It shows Figure 10 An enlarged schematic diagram of part A in the middle;

[0026] Figure 12 It shows Figure 9 A three-dimensional schematic diagram of a variation of the buffer mechanism shown, wherein the slider is located at the first end of the first arc-shaped groove;

[0027] Figure 13 It shows Figure 12 Another perspective view of the buffer mechanism shown, in which the slider slides to the second end of the first arcuate groove, and the elastic reset member is stretched; and

[0028] Figure 14 It shows Figure 12 An exploded view of the buffer mechanism shown. Detailed Implementation

[0029] 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.

[0030] 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.

[0031] Figures 1 to 7 An example of a dual-power transfer switch 100 according to some embodiments of the present disclosure is shown, illustrating the closing and opening processes of the contact assembly 30. The dual-power transfer switch may be, but is not limited to, a fast-change switch. Figure 1 A three-dimensional schematic diagram of a portion of the structure of the dual power supply transfer switch 100 is shown. Figure 2 and Figure 3 It shows Figure 1 The diagram shows a dual power transfer switch 100 from different perspectives, with the drive unit 21 in the ready-to-close position. Figure 4 and Figure 5 It shows Figure 1 The diagram shows the dual power transfer switch 100 from different perspectives, with the drive unit 21 in the closing limit position. Figure 6 It shows Figure 1 Another schematic diagram of the dual power transfer switch 100 shown, in which the drive unit 21 is in the ready-to-open position. Figure 7 It shows Figure 1Another schematic diagram of the dual power supply transfer switch 100 shown, in which the drive element 21 is in the open limit position.

[0032] See Figure 1 The dual power transfer switch 100 includes a housing ( Figure 1 Not shown, the housing includes, for example, Figure 8 The bracket 10 in the middle, two opening and closing mechanisms 20 and two contact assemblies 30 mounted on the housing. For ease of explanation, Figure 1 Only one opening / closing mechanism 20 and one contact assembly 30 are shown in the diagram. The structures of the other opening / closing mechanism 20 and the other contact assembly 30, which are not shown, are similar. Figure 1 The opening and closing mechanism 20 and the contact assembly 30 shown have similar structures. The opening and closing mechanism 20 is used to control the switching of the corresponding contact assembly 30 between the open and closed states. It can be understood that when one contact assembly 30 is in the open state, the other contact assembly 30 is in the closed state; that is, the two contact assemblies 30 are not in the closed state simultaneously. The contact assembly 30 in the closed state allows the corresponding main power supply or backup power supply to supply power to the load.

[0033] See Figure 1 and Figure 2 The contact assembly 30 includes a moving contact support 31, a moving contact 32, and a stationary contact 34. The moving contact support 31 is rotatably mounted on a pivot 33 and is connected to a load terminal, for example, via a braided wire. The load terminal is connected to an electrical appliance. The moving contact 32 extends from the moving contact support 31. The stationary contact 34 is connected to an input terminal 35 via another braided wire (not shown) and is connected to a corresponding mains power supply or backup power supply. In some embodiments, the stationary contact 34 can be pivotally connected to a suitable support of the dual power transfer switch 100 via a pivot (not labeled) and can be subjected to a resilient biasing force from a contact pressure element (not shown).

[0034] The moving contact bracket 31 and its moving contact 32 can rotate between the open and closed limit positions, allowing the contact assembly 30 to switch between the open and closed states. When the contact assembly 30 is in the open state, the moving contact 32 remains separated from the stationary contact 34, and the power supply connected to the stationary contact 34 does not supply power to the load. When the contact assembly 30 is in the closed state, the moving contact 32 remains in contact with the stationary contact 34, and the power supply connected to the stationary contact 34 supplies power to the load.

[0035] The rotation of the moving contact 32 between the open limit position and the close limit position is driven by the opening and closing mechanism 20. The opening and closing mechanism 20 includes, for example, a drive member 21, a pivot 22, an output shaft 23, a mounting base 24, a first drive shaft 251, a second drive shaft 252, a first spring 261, a second spring 262, a first rod 271, a second rod 272, a first positioning pin 281, a second positioning pin 282, a first stop 291, a second stop 292, and a drive device 293.

[0036] In some embodiments, the mounting base 24 is U-shaped and includes a second connecting plate 242 and two opposing mounting plates 241 connected by the second connecting plate 242. Each mounting plate 241 includes a first through hole 2411 and second through holes 2412 and a third through hole 2413 located on both sides of the first through hole 2411. The first through holes 2411, the second through holes 2412, and the third through holes 2413 on the two mounting plates 241 are centered on each other.

[0037] In some embodiments, the drive member 21 is U-shaped and includes a first connecting plate 213 and two opposing drive plates 214, which are connected by the first connecting plate 213. Each drive plate 214 has a first hole (see reference) at one end near the first connecting plate 213. Figure 10 The first hole 211 of the two drive plates 214 is provided at one end away from the first connecting plate 213, and the second hole 212 is provided at the other end. The first holes of the two drive plates 214 are aligned with each other, and the second holes 212 are aligned with each other.

[0038] The two mounting plates 241 of the mounting base 24 are located outside the two drive plates 214 of the drive member 21. A pivot 22 is fitted into the first hole of each drive plate 214 and the first through hole 2411 of each mounting plate 241. The drive member 21 is pivotally connected to the housing (e.g., bracket 10) of the dual power transfer switch 100 via the pivot 22, allowing it to rotate between the closing and opening limit positions. The rotation of the drive member 21 from the opening limit position to the closing limit position can be referred to as the closing rotation of the drive member 21. The rotation of the drive member 21 from the closing limit position to the opening limit position can be referred to as the opening rotation of the drive member 21. The mounting base 24 is pivotally connected to the pivot 22 via the first through hole 2411, allowing the mounting base 24 to rotate relative to the pivot 22.

[0039] Output shaft 23 is parallel to pivot 22. The first end of output shaft 23 is fitted into the second hole 212 of each drive plate 214, and the second end of output shaft 23 is connected to the first end of crank arm 38. The second end of crank arm 38 is non-rotatably connected to moving contact bracket 31. Thus, when drive member 21 rotates about the axis of pivot 22, output shaft 23 drives moving contact bracket 31 to rotate about the axis of pivot 33 via crank arm 38, causing moving contact 32 and stationary contact 34 to abut or separate. The axis of pivot 22 coincides with the axis of pivot 33. It can be understood that the rotation of drive member 21 and the rotation of moving contact bracket 31 are synchronized. When drive member 21 is in the open limit position, moving contact bracket 31 and moving contact 32 are also in the open limit position. When drive member 21 is in the closed limit position, moving contact bracket 31 and moving contact 32 are also in the closed limit position. The rotation of the moving contact support 31 from the open limit position to the close limit position can be called the closing rotation of the moving contact support 31. The rotation of the moving contact support 31 from the close limit position to the open limit position can be called the opening rotation of the moving contact support 31.

[0040] Each drive plate 214 has a latching portion 2143 formed at the end furthest from the first connecting plate 213. Each drive plate 214 has a first slot 2141 formed on one side (see...). Figure 7 And can be referenced Figure 11 The first slot 2141 is formed in the drive plate 214, and a second slot 2142 is formed on the other side of each drive plate 214. In some embodiments, the planes defined by each drive plate 214 about the center line of its first hole and the center line of its second hole 212 are symmetrical.

[0041] The first drive shaft 251 is sleeved in the second through hole 2412 of each mounting plate 241. The first end of the first rod 271 is located between the two mounting plates 241 and is pivotally connected to the first drive shaft 251. The second end of the first rod 271 is provided with an elongated hole 2710. The first locating pin 281 is positioned on the housing (e.g., bracket 10) and passes through the elongated hole 2710. The first spring 261 is sleeved on the first rod 271 and clamped between the first drive shaft 251 and the first locating pin 281.

[0042] The second drive shaft 252 is sleeved in the third through hole 2413 of each mounting plate 241. The first end of the second rod 272 is located between the two mounting plates 241 and is pivotally connected to the second drive shaft 252. The second end of the second rod 272 is provided with an elongated hole 2720. The second positioning pin 282 is positioned on the housing (e.g., bracket 10) and passes through the elongated hole 2720. The second spring 262 is sleeved on the second rod 272 and clamped between the second drive shaft 252 and the second positioning pin 282.

[0043] The first stop 291 and the second stop 292 are pivotally connected to a suitable structure of the housing (e.g., bracket 10). The first stop 291 and the second stop 292 are arranged at intervals along the rotational trajectory of the latch portion 2143. The first stop 291 and the second stop 292 have a stop position and a clearance position, respectively. The first stop 291 and the second stop 292 are held in the stop position by a retaining mechanism (not shown) to prevent the latch portion 2143 from accidentally rotating past the adjacent first stop 291 or second stop 292. The first stop 291 and the second stop 292 can be rotated to the clearance position by the drive device 293 to allow the latch portion 2143 to rotate past the first stop 291 and the second stop 292.

[0044] For example, in some embodiments, the first stop 291 and the second stop 292 each include a shaft, which is pivotally connected to the housing (e.g., bracket 10) rotatably about its own axis. The first stop 291 and the second stop 292 each have two grooves (not shown in the figure). When the first stop 291 and the second stop 292 are in the stop position, the first stop 291 or the second stop 292 can abut against the latch portion 2143 of the drive member 21, thereby preventing the latch portion 2143 from continuing to rotate past the first stop 291 or the second stop 292. When the first stop 291 and the second stop 292 are in the avoidance position, the first stop 291 and the second stop 292 avoid the latch portion 2143 of the drive member 21 through their respective grooves, allowing the latch portion 2143 to continue rotating past the first stop 291 and the second stop 292.

[0045] In some embodiments, a first operating part 2911 may be provided on the first stop 291, and a second operating part 2921 may be provided on the second stop 292. The driving device 293 includes a telescopic rod 2931, which is used to apply force to the first operating part 2911 and the second operating part 2921 to drive the first stop 291 and the second stop 292 to rotate from the stop position to the avoidance position.

[0046] The following is combined with Figures 2 to 7 This will explain the working process of the dual power supply transfer switch 100.

[0047] See Figure 2 and Figure 3 Both the first stop 291 and the second stop 292 are in the stopped position under the action of the holding mechanism. The contact assembly 30 is in the open state, and the moving contact 32 is away from the stationary contact 34. Both the first spring 261 and the second spring 262 are in the compressed state, applying force to the first drive shaft 251 and the second drive shaft 252 respectively, so that the mounting base 24 has a tendency to rotate. Figure 2(The current is a counter-clockwise rotation). At this time, the first drive shaft 251 engages with the first slots 2141 of each drive plate 214 of the drive member 21, and each latch 2143 abuts against the first stop 291 in the stop position, so that the drive member 21 is held in the ready-to-close position. The ready-to-close position is between the open limit position and the close limit position, and is close to the open limit position. At this time, the moving contact bracket 31 and the moving contact 32 are also in the ready-to-close position.

[0048] See Figure 4 and Figure 5 The telescopic rod 2931 of the drive device 293 extends, and by pressing the first operating part 2911 and the second operating part 2921, the first stop 291 and the second stop 292 are driven to the avoidance position. Neither the first stop 291 nor the second stop 292 interferes with the rotation of each latch 2143. The first spring 261 and the second spring 262 both... Figure 2 The compression state is released, and through the engagement of the first drive shaft 251 and the first slot 2141, the drive member 21 is driven to rotate around the axis of the pivot 22 to close the circuit until the drive member 21 rotates to the closing limit position. When the drive member 21 rotates to the closing limit position, it drives the moving contact bracket 31 to rotate around the axis of the pivot 33 through the output shaft 23 and the crank arm 38 to close the circuit until the moving contact 32 abuts against the stationary contact 34. At this time, the drive member 21, the moving contact bracket 31, and the moving contact 32 all reach the closing limit position, the moving contact 32 abuts against the stationary contact 34, and the contact assembly 30 is in the closed state.

[0049] Then, see Figure 6 The telescopic rod 2931 of the drive device 293 retracts and no longer presses against the first operating part 2911 and the second operating part 2921. Both the first stop 291 and the second stop 292 return to their stop positions under the action of the holding mechanism. For example, by applying torque to the mounting base 24 through the first drive shaft 251 and the second drive shaft 252, the mounting base 24 rotates around the axis of the pivot 22, causing the first drive shaft 251 to disengage from the first slot 2141, and the second drive shaft 252 to engage with the second slot 2142. At this time, the first spring 261 and the second spring 262 are still in a compressed state, applying force to the first drive shaft 251 and the second drive shaft 252 respectively, causing the mounting base 24 to have a rotational tendency. Figure 6 (The tendency to rotate counterclockwise). Each latch 2143 abuts against the second stop 292 in the stop position, keeping the drive member 21 in the ready-to-open position. The ready-to-open position is between the closing limit position and the opening limit position, and is close to the closing limit position. At this time, the moving contact support 31 and the moving contact 32 are also in the ready-to-open position. At the same time, the stationary contact 34, under the action of the elastic bias force of the contact pressure member, abuts against the moving contact 32, keeping the contact assembly 30 in the closed state.

[0050] When it is necessary to disconnect the circuit breaker, see [link / reference]. Figure 7 The telescopic rod 2931 of the drive device 293 extends, and by pressing the first operating part 2911 and the second operating part 2921, the first stop 291 and the second stop 292 are driven to the avoidance position. Neither the first stop 291 nor the second stop 292 interferes with the rotation of each latch 2143. The first spring 261 and the second spring 262 both... Figure 6 The compression state shown is released, and through the engagement of the second drive shaft 252 and the second slot 2142, the drive member 21 is driven to rotate around the axis of the pivot 22 to open the circuit until it reaches the opening limit position. When the drive member 21 rotates to the opening limit position, it drives the moving contact bracket 31 to rotate around the axis of the pivot 33 through the output shaft 23 and the crank arm 38 to open the circuit until the moving contact bracket 31 and the moving contact 32 also rotate to the opening limit position.

[0051] Subsequently, the telescopic rod 2931 of the drive device 293 retracts and no longer presses against the first operating part 2911 and the second operating part 2921. Both the first stop 291 and the second stop 292 return to their stop positions under the action of the holding mechanism. For example, by applying torque to the mounting base 24 through the first drive shaft 251 and the second drive shaft 252, the mounting base 24 rotates around the pivot 22, causing the first drive shaft 251 to engage with the first slot 2141 and the second drive shaft 252 to disengage from the second slot 2142. The opening and closing mechanism 20 and the contact assembly 30 can then return to their original positions. Figure 2 and Figure 3 The state shown indicates preparation for the next closing.

[0052] As described above, the opening and closing rotations of the moving contact 32 of the contact assembly 30 are indirectly driven by the elastic restoring force of the first spring 261 and the second spring 262. To ensure good opening performance of the dual-power transfer switch 100, the design of the first spring 261 and the second spring 262 must meet the requirement of enabling the contact assembly 30 to open quickly. It can be understood that when the contact assembly 30 can meet the requirement of rapid opening under the action of the first spring 261 and the second spring 262, it will correspondingly close quickly under the action of the first spring 261 and the second spring 262. That is, the opening and closing speeds of the moving contact 32 are relatively fast. For a fast transfer switch, the opening and closing speeds of the moving contact 32 will be even faster. Thus, when the contact assembly 30 closes, when the moving contact 32 abuts against the stationary contact 34, the moving contact 32 has a high speed at the point of contact, resulting in a large impact force between the moving contact 32 and the stationary contact 34.

[0053] To prevent excessive impact force between the moving contact 32 and the stationary contact 34 when the contact assembly 30 closes, which could cause deformation, wear, or even damage to the moving contact 32 and the stationary contact 34 and thus affect the service life of the dual power supply transfer switch. See also Figures 8 to 14 The embodiments of this disclosure also provide a dual power supply transfer switch 100, which can reduce the speed of the moving contact 32 at the point of contact when the moving contact assembly 30 is closed, reduce the impact when the moving contact 32 and the stationary contact 34 come into contact, and will not affect the opening speed of the contact assembly 30.

[0054] Figures 8 to 10 A dual power transfer switch 100 according to some embodiments of the present disclosure is shown. Figure 8 A three-dimensional schematic diagram of a portion of the structure of the dual power supply transfer switch 100 is shown. Figure 9 It shows Figure 8 Another perspective view of the dual power supply transfer switch 100 shown is provided for ease of explanation. Figure 9 One opening / closing mechanism and one buffer mechanism are omitted from the text. Figure 10 It shows Figure 9 The diagram shows a partial exploded view of the opening and closing mechanism 20 and the buffer mechanism 40. Figure 11 It shows Figure 10 An enlarged schematic diagram of part A in the middle.

[0055] The dual-power transfer switch 100 includes a housing and two opening / closing mechanisms 20 and two contact assemblies mounted on the housing. As previously described, the housing may include a bracket 10. The two opening / closing mechanisms 20 are substantially identical in structure, and the two contact assemblies are substantially identical in structure.

[0056] See Figures 9 to 11 The opening and closing mechanism 20 includes a drive component 21, a pivot 22, an output shaft 23, a mounting base 24, a first drive shaft 251, a second drive shaft 252, a first spring 261, a second spring 262, a first rod 271, a second rod 272, a first positioning pin 281, a second positioning pin 282, a first stop, a second stop, and a drive device. Unless otherwise specified, the structure of the opening and closing mechanism 20 can be referenced above. Figures 1 to 7 The structure of the opening and closing mechanism 20 in the middle.

[0057] Specifically, the drive member 21 is provided with a first hole 211 and a second hole 212. The drive member 21 is, for example, U-shaped and includes a first connecting plate (see reference). Figure 1The system comprises a first connecting plate 213 and two opposing drive plates 214. A first hole 211 is provided at one end of each drive plate 214 near the first connecting plate, and a second hole 212 is provided at one end of each drive plate 214 away from the first connecting plate. Each drive plate 214 also has a latching portion 2143 at the end away from the first connecting plate 213. Furthermore, each drive plate 214 has a first slot 2141 on one side and a second slot 2142 on the other side.

[0058] The mounting base 24 is provided with a first through hole 2411, a second through hole 2412 and a third through hole (see...). Figure 2 )2413, the first through hole 2411 is located between the second through hole 2412 and the third through hole 2413. More specifically, the mounting base is U-shaped and includes a second connecting plate (reference). Figure 1 The second connecting plate 242 and two opposing mounting plates 241 are included. A first through hole 2411, a second through hole 2412, and a third through hole 2413 all penetrate the two mounting plates 241. The two mounting plates 241 are located outside the two drive plates 214.

[0059] Pivot 22 is fitted into the first hole 211 of each drive plate 214 and the first through hole 2411 of each mounting plate 241. The first end of pivot 22 is pivotally connected to the hole 101 of bracket 10, so that pivot 22 can rotate about its own axis. Pivot 22 is pivotally connected to the first through hole 2411 of each mounting plate 241, so that mounting base 24 can rotate relative to pivot 22.

[0060] The first end of the output shaft 23 is fitted into the second hole 212 of each drive plate 214. The middle part of the output shaft 23 passes through the second arc-shaped groove 12 on the bracket 10, and the second end of the output shaft 23 is connected by a crank arm (see...). Figure 1 The crank arm 38) and contact assembly (see Figure 1 The moving contact support of the contact assembly 30) is connected. Where there is no conflict, the structure of the contact assembly can be referred to above. Figures 1 to 7 The structure of the contact assembly 30 is not described in detail here. When the drive unit 21 performs a closing or opening rotation, the output shaft 23 drives the moving contact bracket to rotate via a crank arm, so that the moving contact abuts against or separates from the corresponding stationary contact. In some embodiments, the portion of the output shaft 23 located between the two drive plates 214 may be fitted with a spacer sleeve (not labeled in the figure).

[0061] The first drive shaft 251 is sleeved in the second through hole 2412 of each mounting plate 241. As mentioned above, the first drive shaft 251 can abut against the first slot 2141 of each drive plate 214 to drive the drive member 21 to perform a closing rotation.

[0062] The first end of the first rod 271 is located between the two mounting plates 241 and is pivotally connected to the first drive shaft 251. The second end of the first rod 271 is provided with an elongated hole 2710 (see...). Figure 2 The first locating pin 281 is positioned on the bracket 10 of the housing and passes through the elongated hole 2710 of the first rod 271. The first spring 261 is sleeved on the first rod 271 and clamped between the first drive shaft 251 and the first locating pin 281.

[0063] The second drive shaft 252 is sleeved in the third through hole 2413 of each mounting plate 241. As mentioned above, the second drive shaft 252 can abut against the second slot 2142 of each drive plate 214 to drive the drive member 21 to perform a tripping rotation.

[0064] The first end of the second rod 272 is located between the two mounting plates 241 and is pivotally connected to the second drive shaft 252. The second end of the second rod 272 is provided with an elongated hole 2720 (see...). Figure 2 The second locating pin 282 is positioned on the bracket 10 of the housing and passes through the elongated hole 2720 of the second rod 272. The second spring 262 is sleeved on the second rod 272 and clamped between the second drive shaft 252 and the second locating pin 282.

[0065] See also Figures 9 to 11 The pivot 22 is fitted with the first hole 211 in a non-rotatable manner, so that the pivot 22 and the drive member 21 are connected in a non-rotatable manner. In this way, when the drive member 21 rotates around the axis of the pivot 22 to close or open the circuit, the pivot 22 rotates together with the drive member 21 around its own axis.

[0066] With the above Figures 1 to 7 Unlike the dual-power transfer switch 100 shown, this dual-power transfer switch 100 also includes a buffer mechanism 40. The buffer mechanism 40 specifically includes a one-way bearing (also referred to as a one-way clutch bearing) 41 and an inertia wheel 42. The one-way bearing 41 is mounted on the pivot 22, and the inertia wheel 42 is mounted on the one-way bearing 41; that is, the inertia wheel 42 is mounted on the pivot 22 via the one-way bearing 41. The one-way bearing 41 is configured such that when the drive member 21 performs a closing rotation, the inertia wheel 42 is allowed to rotate together with the pivot 22 and the drive member 21. It can be understood that when the drive member 21 performs a opening rotation, under the action of the one-way bearing 41, the inertia wheel 42 may not rotate together with the pivot 22.

[0067] Therefore, when the drive component 21 rotates to close, the first spring 261 and the second spring 262, released from their compressed state, not only drive the drive component 21, the moving contact support 31, and the moving contact 32 to rotate, but also drive the inertia wheel 42 to rotate via the pivot 22. This helps to reduce the closing speed of the moving contact 32, significantly reducing the speed of the moving contact 32 at the point of contact, thereby reducing the impact force between the moving contact 32 and the stationary contact 34 at the moment of contact. Furthermore, after the moving contact 32 and the stationary contact 34 come into contact, although the drive component 21 stops rotating, the inertia wheel 42 continues to rotate, thus consuming the absorbed energy and protecting the contact assembly 30. Conversely, when the drive component 21 rotates to open, under the action of the one-way bearing 41, the inertia wheel 42 does not rotate with the pivot 22, and therefore does not affect the opening speed of the moving contact 32. Thus, while improving the closing performance, the opening performance is not affected. In addition, when the moving contact support 31 and the driving component 21 rotate to the maximum opening distance, there will be a rebound. This rebound will drive the inertia wheel 42 to rotate. At this time, the inertia wheel 42 can suppress the rebound of the moving contact support 31 and the driving component 21, which is beneficial to the arc extinguishing.

[0068] In the dual-power transfer switch 100 according to an embodiment of this disclosure, the drive member 21 is non-rotatably connected to the pivot 22 via a first hole 211, and the inertia wheel 42 is sleeved on the pivot 22 via a one-way bearing 41, thereby increasing the rotational inertia of the moving contact support 31 during closing rotation. This helps to reduce the closing speed of the moving contact 32 and the collision speed at the point of contact, reducing the impact force between the moving contact 32 and the stationary contact 34 at the moment of contact, thus protecting the contact assembly 30. Furthermore, this additional rotational inertia is effective during closing but ineffective during opening, and does not affect the opening speed of the moving contact 32, thereby improving the closing performance of the dual-power transfer switch 100 without affecting its opening performance.

[0069] See Figure 10 and Figure 11This illustrates an exemplary embodiment of a non-rotatable connection between pivot 22 and drive member 21. Specifically, the wall of the first hole 211 is provided with a first cross-section 2110, and the outer peripheral wall of the first end of pivot 22 is provided with a second cross-section 2212. The first cross-section 2110 and the second cross-section 2212 cooperate to restrict the relative rotation of drive member 21 and pivot 22. The number of the first cross-section 2110 and the second cross-section 2212 can be set as needed. The number of the first cross-section 2110 and the second cross-section 2212 can be the same or different, as long as the relative rotation of drive member 21 and pivot 22 can be restricted. For example, in some embodiments, the wall of the first hole 211 may be provided with a first cross-section 2110, and the pivot 22 may be provided with a second cross-section 2212. Alternatively, in some embodiments, the wall of the first hole 211 may be provided with a first cut surface 2110, and two second cut surfaces 2212 may be symmetrically provided on the pivot 22, one of the two second cut surfaces 2212 abutting against the first cut surface 2110.

[0070] In some embodiments, the diameter of the pivot 22 is not uniform. The drive member 21 may be fitted onto the first end of the pivot 22 with a smaller diameter, and the one-way bearing 41 may be fitted onto the second end of the pivot 22 with a larger diameter. In addition, the second end of the pivot 22 may also be provided with an axial limiting structure, which is used to limit the axial position of the one-way bearing 41 and the inertia wheel 42 on the pivot 22.

[0071] Figure 10 An exemplary embodiment of the axial limiting structure is shown. Specifically, the axial limiting structure includes a limiting flange 2231 and a limiting groove 2232. The limiting flange 2231 protrudes outward from the outer peripheral wall of the pivot 22, restricting the movement of the one-way bearing 41 and the inertia wheel 42 toward a first end of the pivot 22. The limiting groove 2232 is disposed on the outer peripheral wall of the pivot 22 and is used to mount a retaining ring 224, which restricts the movement of the one-way bearing 41 and the inertia wheel 42 toward a second end of the pivot 22. Of course, the axial limiting structure can also have other embodiments, as long as it can restrict the axial movement of the one-way bearing 41 and the inertia wheel 42 on the pivot 22.

[0072] Figure 10 An exemplary embodiment of the inertia wheel 42 is shown. Specifically, the inertia wheel 42 includes a sleeve portion 420 and a first wheel body 421. The sleeve portion 420 is sleeved on a one-way bearing 41. The first wheel body 421 extends outward from the outer peripheral wall of the sleeve portion 420. The first wheel body 421 may be integrally formed with the sleeve portion 420. The thickness of the first wheel body 421 is less than the axial length of the sleeve portion 420.

[0073] See you again Figure 8In some embodiments, the two opening and closing mechanisms 20 of the dual power supply transfer switch 100 may each be equipped with a buffer mechanism 40, and the one-way bearings 41 of the two buffer mechanisms 40 are respectively sleeved on the pivots 22 of the corresponding opening and closing mechanisms 20. In some embodiments, by reasonably setting the position of the first wheel body 421 of each inertia wheel 42 on the sleeve portion 420, the first wheel bodies 421 of the inertia wheels 42 of the two buffer mechanisms 40 are spaced apart by a predetermined distance in the axial direction, so that the two inertia wheels 42 (in the axial projection direction) have overlapping portions. This is beneficial to save assembly space without reducing the size of the inertia wheels 42.

[0074] In some embodiments, the driving members 21 of the two opening and closing mechanisms 20 rotate in opposite directions. For example, in some embodiments, the closing rotation direction of the left driving member 21 is counterclockwise, while the closing rotation direction of the right driving member 22 is clockwise. This facilitates the layout of the two opening and closing mechanisms 20 and saves assembly space.

[0075] Of course, the implementation of the inertial wheel 42 is not limited to the examples above. Figure 12 and Figure 13 That is, it shows Figure 9 The following is a three-dimensional schematic diagram from different perspectives of a variant of the buffer mechanism 40 shown. Figure 14 It shows Figure 12 An exploded view of the buffer mechanism 40 shown.

[0076] See Figures 12 to 14 In some embodiments, the inertia wheel 42 may further include at least one second wheel body 422 sleeved on the sleeve portion 420. In some embodiments, one end of the at least one second wheel body 422 may be limited by the first wheel body 421, and the other end may be limited by a retaining ring (not shown) mounted on the sleeve portion 420. Among the stacked first wheel body 421 and at least one second wheel body 422, a linkage structure is provided between each pair of adjacent wheel bodies. The linkage structure may be configured such that when the drive member 21 performs a closing rotation in the closing direction S1, one of the two adjacent wheel bodies is allowed to rotate a predetermined angle in the closing direction S1 and then drive the other wheel body to rotate.

[0077] More specifically, taking an inertia wheel 42 configured with a second wheel body 422 as an example. When the driving member 21 rotates in the closing direction S1, the first wheel body 421 rotates with the pivot 22 in the closing direction S1. After the first wheel body 421 rotates a certain angle, under the action of the linkage structure, the second wheel body 422 begins to rotate together with the first wheel body 421. Thus, when the driving member 21 rotates in the closing direction, the first wheel body 421 follows the pivot 22 throughout the entire rotation, and the second wheel body 422 is driven by the first wheel body 421 to rotate with the pivot 22 after the first wheel body 421 has rotated a certain angle. It can be understood that when the inertia wheel 42 is configured with two or more second wheel bodies 422, each second wheel body 422 rotates sequentially with the pivot 22.

[0078] Because the drive component 21 only needs to drive the first wheel 421 to rotate in the initial stage of closing rotation, this is conducive to the drive component 21 starting to rotate quickly, so as to obtain a shorter closing time. As the drive component 21 rotates during the closing rotation, it gradually drives each of the second wheels 422 to rotate, thereby gradually increasing the moment of inertia of the moving contact bracket during closing rotation, which is conducive to obtaining a lower closing point speed.

[0079] In some embodiments, the linkage structure may include at least one first arcuate groove 431 and at least one slider 432. The first arcuate groove 431 is disposed on one of two adjacent wheel bodies. The slider 432 is disposed on the other of two adjacent wheel bodies and slides in engagement with the at least one first arcuate groove 431. See also Figure 14 In the exemplary embodiment of the linkage structure shown, the first arc-shaped groove 431 is specifically disposed on the second wheel body 422, and the slider 432 is specifically disposed on the first wheel body 421. Of course, there are many other embodiments of the linkage structure and it is not limited to the example above. The linkage structure only needs to be able to make the first wheel body 421 and each of the second wheels body 422 rotate sequentially when the driving member 21 performs the closing movement.

[0080] In some embodiments, the linkage structure may include a plurality of first arc-shaped grooves 431 and a plurality of sliders 432, which are evenly spaced on the corresponding wheel bodies. This facilitates uniform force distribution on each wheel body during rotation.

[0081] In some embodiments, among the stacked first wheel body 421 and at least one second wheel body 422, the weight of the first wheel body 421 and at least one second wheel body 422 gradually increases in the direction from the first wheel body 421 to the second wheel body 422 away from the first wheel body 421. This is beneficial for obtaining a shorter closing time. Of course, in some embodiments, the first wheel body 421 and at least one second wheel body 422 may have the same weight. Or at least one second wheel body 422 may have the same weight, and the weight of the second wheel body 422 may be greater than the weight of the first wheel body 421.

[0082] In some embodiments, an elastic reset member is provided between each pair of adjacent wheel bodies (e.g., between the first wheel body 421 and the adjacent second wheel body 422, and between two adjacent second wheel bodies 422). Specifically, when the drive member 21 performs a closing movement, the first wheel body 421 and at least one second wheel body 422 rotate sequentially in the closing direction S1 under the action of the linkage structure, causing the elastic reset member located between each pair of adjacent wheel bodies to be compressed or stretched. When the drive member 21 rotates to the closing position, and at least one second wheel body 422 is no longer directly or indirectly driven by the first wheel body 421 and rotates in the closing direction S1, the elastic reset member resets, causing each second wheel body 422 to reset, thereby buffering the next closing movement of the drive member 21 and the moving contact support.

[0083] Figures 12 to 14 An exemplary embodiment of the elastic reset member 45 is shown. The elastic reset member 45 includes a spring, one end of which is connected, for example, to a slider 432 disposed on a first wheel body 421, and the other end of which is connected, for example, to a second wheel body 422 where the first arcuate groove 431 is located. More specifically, the second wheel body 422 may be provided with a fixing post 4221 for connection with the spring. See also... Figure 12 When the inertia wheel 42 is in its initial position, the slider 432 is held at the first end of the first arc-shaped groove 431 by the elastic reset member 45. See also Figure 13 When the drive unit 21 performs the closing motion, the slider 432 can move to the second end of the first arc-shaped groove 431, and the elastic reset member 45 is stretched to... Figure 13 In the state shown, the first wheel 421 drives the second wheel 422 to rotate together in the closing direction S1. When the driving member 21 rotates to the closing position, and the first wheel 421 no longer drives the second wheel 422 to rotate in the closing direction S1 through the linkage structure, the stretched elastic reset member resets, and the slider 432 resets to the first end of the first arc groove 431, thereby preparing for the next closing movement of the driving member 21 and the moving contact bracket.

[0084] Of course, the implementation of the elastic reset member 45 is not limited to the above examples. For example, in some embodiments not shown, the elastic reset member 45 can be disposed in the first arc groove 431. One end of the elastic reset member 45 can be connected to the slider 432, and the other end can be connected to one end of the first arc groove 431. It can also play the role of resetting each wheel of the inertia wheel 42.

[0085] 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 (100), characterized in that, include: Frame (10); The opening and closing mechanism (20) includes: The drive element (21) is provided with a first hole (211); and A pivot (22) is fitted into the first hole (211) and is non-rotatably engaged with the first hole (211), and the pivot (22) is pivotally connected to the bracket (10) to allow the drive member (21) to rotate about the axis of the pivot (22) for closing or opening; and Buffer mechanism (40), including: Inertia wheel (42); and A one-way bearing (41) is provided, through which the inertia wheel (42) is mounted on the pivot (22), and the one-way bearing (41) is configured as follows: When the drive unit (21) performs a closing rotation, the inertial wheel (42) is allowed to rotate together with the pivot (22).

2. The dual power supply transfer switch (100) according to claim 1, characterized in that, The first hole (211) has a first cross-section (2110) on its wall, and the outer peripheral wall of the first end of the pivot (22) has a second cross-section (2212). The first cross-section (2110) and the second cross-section (2212) cooperate to restrict the relative rotation of the drive member (21) and the pivot (22); and The one-way bearing (41) is sleeved on the second end of the pivot (22).

3. The dual power supply transfer switch (100) according to claim 1, characterized in that, The drive component (21) is sleeved on the first end of the pivot (22). The one-way bearing (41) is sleeved on the second end of the pivot (22), and An axial limiting structure is provided at the second end of the pivot (22), which is used to limit the axial position of the one-way bearing (41) and the inertia wheel (42) on the pivot (22).

4. The dual power supply transfer switch (100) according to claim 1, characterized in that, The drive element (21) is also provided with a second hole (212), and The opening and closing mechanism (20) also includes an output shaft (23), which is sleeved in the second hole (213) and connected to the moving contact bracket. When the driving member (21) performs the closing rotation or the opening rotation, the output shaft (23) drives the moving contact bracket to rotate so that the moving contact abuts or separates from the corresponding stationary contact.

5. The dual power supply transfer switch (100) according to claim 1, characterized in that, The dual power supply transfer switch (100) is equipped with two opening and closing mechanisms (20) and two buffer mechanisms (40), and the one-way bearings (41) of each buffer mechanism (40) are respectively sleeved on the pivot (22) of the corresponding opening and closing mechanism (20).

6. The dual power supply transfer switch (100) according to claim 5, characterized in that, The inertia wheels (42) of the two buffer mechanisms (40) have overlapping portions.

7. The dual power supply changeover switch (100) according to any one of claims 1 to 6, characterized in that, The inertial wheel (42) includes: The sleeve portion (420) is sleeved on the one-way bearing (41); The first wheel body (421) extends outward from the outer peripheral wall of the sleeve portion (420), and the thickness of the first wheel body (421) is less than the axial length of the sleeve portion (420).

8. The dual power supply transfer switch (100) according to claim 7, characterized in that, The inertia wheel (42) further includes at least one second wheel body (422) sleeved on the sleeve portion (420), and In the first wheel body (421) and the at least one second wheel body (422) stacked together, a linkage structure is provided between each pair of adjacent wheel bodies. The linkage structure is configured such that when the drive member (21) rotates in the closing direction (S1), one of the two adjacent wheel bodies is allowed to rotate a predetermined angle in the closing direction (S1) and drive the other wheel body to rotate.

9. The dual power supply transfer switch (100) according to claim 8, characterized in that, The linkage structure includes: At least one first arcuate groove (431) is provided on one of every two adjacent wheel bodies; and At least one slider (432) is disposed on the other wheel in each of two adjacent wheel bodies and slides in engagement with the at least one first arcuate groove (431).

10. The dual power supply transfer switch (100) according to claim 8, characterized in that, An elastic reset element (45) is provided between each pair of adjacent wheel bodies.

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