Dual-power change-over switch

Abstract

The embodiment of the utility model provides a dual-power change-over switch, and the switch-on and switch-off mechanism comprises a mounting seat which is pivoted with a first pivot and is provided with a dead point position, a switch-off preparation position and a switch-on preparation position; the two driving shafts are located on the two sides of the first pivot. The driving mechanism comprises a driving wheel which is pivoted with the second pivot; the driven wheel is pivoted with the first pivot, is provided with two driving parts and is used for driving the mounting seat to pass through the dead point position; the buffer mechanism comprises a buffer part which is pivoted with the second pivot and can rotate between a first position and a second position, the buffer part comprises a first abutting part and a second abutting part, and the first abutting part abuts against the second abutting part when the mounting seat rotates from the dead point position to the opening preparation position or the closing preparation position; one of the two driving shafts abuts against one of the first abutting part and the second abutting part; and the elastic retaining piece is used for retaining the buffer piece at the first position or the second position.

Description

TECHNICAL FIELD

[0001] Embodiments of the present disclosure generally relate to the field of electrical equipment, and in particular, to a dual power transfer switch. BACKGROUND

[0002] In some electrical equipment, to avoid power failure caused by the equipment, the equipment is usually configured with two independent power supply sources, i.e., a normal power supply source and a backup power supply source. The normal power supply source and the backup power supply source selectively supply power to the equipment through a dual power transfer switch.

[0003] The dual power transfer switch includes two contact assemblies, each of which includes a static contact and a moving contact mounted on a moving contact support. The moving contact support can rotate between an open position and a closed position. When the moving contact support is in the open position, the moving contact on the moving contact support is separated from the static contact, and at this time, the contact assembly is in an open state. When the moving contact support is in the closed position, the moving contact on the moving contact support abuts against the static contact, and at this time, the contact assembly is in a closed state. When one of the two contact assemblies is in the closed state, the other is in the open state, so that one of the normal power supply source and the backup power supply source supplies power to the equipment. SUMMARY

[0004] The present disclosure provides a dual power transfer switch, including: an opening and closing mechanism, including: a mounting seat, which is pivoted to a first pivot, and has a dead point position, a preparation open position and a preparation closed position; and two drive shafts, which are installed on the mounting seat and located on both sides of the first pivot; a driving mechanism, including: a driving wheel, which is pivoted to a second pivot; and a driven wheel, which is driven by the driving wheel and is pivoted to the first pivot, the driven wheel is provided with two driving parts, the two driving parts are used for cooperating with the two drive shafts to drive the mounting seat to pass through the dead point position; and a buffer mechanism, including: a buffer, which is pivoted to the second pivot and can rotate between a first position and a second position, the buffer includes an abutting structure, the abutting structure includes a first abutting part and a second abutting part, wherein in the process that the mounting seat rotates from the dead point position to the preparation open position or the preparation closed position, one of the two drive shafts abuts against one of the first abutting part and the second abutting part, and then the buffer is driven by the driven wheel to rotate from one of the first position and the second position to the other, so as to allow the mounting seat to rotate to the preparation open position or the preparation closed position; and an elastic retaining member, which is used for retaining the buffer in the first position or the second position.

[0005] In some embodiments, the dual power transfer switch is configured with two opening and closing mechanisms; the driving mechanism is configured with two driven wheels, the two driven wheels are located on both sides of the driving wheel, the two driven wheels correspond to the two opening and closing mechanisms, and each driven wheel is pivoted to the first pivot of the corresponding opening and closing mechanism; and the buffer includes two abutting structures, the two abutting structures correspond to the two opening and closing mechanisms.

[0006] In some embodiments, the buffer includes: a ring portion sleeved on the second pivot; two abutting structures extending from the ring portion in opposite directions, and each abutting structure is V-shaped, two feet of the abutting structure form a first abutting portion and a second abutting portion; and an extension arm extending from the ring portion and located between the two abutting structures, the extension arm is connected with the elastic retaining member.

[0007] In some embodiments, the elastic retaining member is a spring, one end of the spring is connected with the bracket, and the other end is connected with one end of the extension arm away from the ring portion.

[0008] In some embodiments, when one of the two drive shafts abuts one of the first abutting portion and the second abutting portion, the drive shaft applies a torque around the second pivot to the buffer.

[0009] In some embodiments, the periphery of the driven wheel includes a gear portion and two drive portions located on both sides of the gear portion, the gear portion is engaged with the driving wheel, and each drive portion includes a first sector recess for accommodating a corresponding drive shaft, two end walls of the first sector recess of each drive portion selectively push the corresponding drive shaft to make the mounting seat pass through the dead point position.

[0010] In some embodiments, the surface of the buffer is provided with a convex column, the gear portion facing the surface of the buffer is provided with a second sector recess, the convex column is accommodated in the second sector recess, and two end walls of the second sector recess selectively abut the convex column to drive the buffer to rotate from one of the first position and the second position to the other.

[0011] In some embodiments, the opening and closing mechanism further includes: two drive springs applying torque to the mounting seat through the two drive shafts; and a driving member pivoted with the first pivot, capable of being selectively driven by the two drive shafts, and capable of being stopped by the stopper assembly to keep the mounting seat in the ready opening position or the ready closing position.

[0012] In some embodiments, the driving member is connected with the movable contact bracket through the output assembly for driving the movable contact bracket to rotate to make the movable contact on the movable contact bracket abut or separate from the corresponding stationary contact.

[0013] In some embodiments, the stopper assembly includes two stoppers, the two stoppers are arranged at intervals along the rotation track of the driving member, and each stopper can rotate to a stopping position or a avoiding position, and when the mounting seat is in the ready opening position or the ready closing position, the driving member is stopped by one of the two stoppers in the stopping position.

[0014] In embodiments according to the present disclosure, during the rotation of the mounting base of the opening and closing mechanism to the ready opening position or the ready closing position, one of the two driving shafts on the mounting base first collides with the corresponding abutting portion of the buffer, and then the mounting base reaches the ready opening position or the ready closing position. Since the collision of the driving shaft and the corresponding abutting portion of the buffer can consume most of the energy released by the two driving springs of the opening and closing mechanism, when the driving member of the opening and closing mechanism rotates to the ready opening position or the ready closing position and collides with the corresponding stop member, the collision force between the driving member and the stop member is greatly reduced. Thus, damage to the stop member due to a large impact can be effectively avoided, thereby improving the reliability of the double power transfer switch.

[0015] It should be understood that the content described in this part is not intended to limit the key features or important features of the embodiments of the present disclosure, nor is it used to limit the scope of the present disclosure. Other features of the present disclosure will become apparent through the following description. BRIEF DESCRIPTION OF DRAWINGS

[0016] The above and other features, advantages, and aspects of embodiments of the present disclosure will become more apparent by describing in detail the following embodiments with reference to the attached drawings. In the drawings, the same or similar reference numerals refer to the same or similar elements, in which:

[0017] Figure 1 and Figure 2 shows a partial schematic view of a double power transfer switch according to some embodiments of the present disclosure, Figure 1 one of the opening and closing mechanisms drives the corresponding movable contact to the opening limit position away from the static contact, and the other opening and closing mechanism drives the corresponding movable contact to the closing limit position pressing against the static contact, Figure 2 one of the opening and closing mechanisms drives the corresponding movable contact to the ready closing position, and the other opening and closing mechanism drives the corresponding movable contact to the ready opening position, Figure 1 and Figure 2 the contact assemblies of each opening and closing mechanism are shielded by the bracket, and Figure 2 the buffer mechanism is omitted;

[0018] Figures 3 to 7 shows Figure 1 schematic views of different perspectives of the opening and closing mechanisms and contact assemblies of the double power transfer switch shown, Figure 3 the movable contact is driven to the opening limit position in Figure 4 and Figure 5 the movable contact is driven to the ready closing position in Figure 6 the movable contact is driven to the closing limit position in Figure 7 the movable contact is driven to the ready opening position in

[0019] Figure 8 shows a perspective view of a part of the opening and closing mechanism and a part of the driving mechanism in the double power transfer switch shown in Figure 1

[0020] Figure 9 shows an exploded view of a part of the opening and closing mechanism, a part of the driving mechanism and a part of the buffer mechanism in the double power transfer switch shown in Figure 1

[0021] Figure 10 shows a perspective view of the buffer mechanism in the double power transfer switch shown in Figure 1

[0022] Figure 11 and Figure 12 shows a perspective view of the double power transfer switch shown in Figure 1 wherein the mounting seat of each of the two opening and closing mechanisms rotates through the dead point position under the driving of the corresponding driving mechanism, and one driving shaft of each of the two opening and closing mechanisms and the corresponding abutting part of the buffer member abut;

[0023] Figure 13 shows a cross-sectional view of the double power transfer switch shown in

[0024] Figure 14 shows a cross-sectional view of the double power transfer switch shown in

[0025] Figure 15 shows a perspective view of the driven wheel in the double power transfer switch shown in Figure 1 DETAILED DESCRIPTION

[0026] Preferred embodiments of the present disclosure will be described in greater detail below, with reference to the accompanying drawings. While preferred embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be embodied in various forms without being limited by 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.

[0027] The term “comprising” and variations thereof as used herein are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements is not necessarily limited to those elements, but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an overly literal sense unless expressly so defined herein.​​​​

[0028] Figures 1 to 15 An example of a dual power transfer switch 100 is shown. Specifically, referring to Figures 1 to 5 , the dual power transfer switch 100 includes a housing (the housing includes a bracket 10, for example), two switching mechanisms 20 mounted on the housing, two contact assemblies 30, a drive mechanism 50, and a buffer mechanism 60. The dual power transfer switch can be, but is not limited to, a fast transfer switch. Each switching mechanism 20 is configured to control the switching of the corresponding contact assembly 30 between an open state and a closed state. Figure 1 and Figure 2 , the two switching mechanisms 20 are arranged left and right, and the two contact assemblies 30 are shielded by the bracket 10. 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, i.e., the two contact assemblies 30 are not in the closed state at the same time. The contact assembly 30 in the closed state allows the corresponding normal power source or standby power source to supply power to the load.

[0029] Figure 1 The two drive springs 26 of one switching mechanism 20 drive the moving contact 32 of the corresponding contact assembly 30 to the open limit position, and the two drive springs 26 of the other switching mechanism 20 drive the moving contact 32 of the corresponding contact assembly 30 to the closed limit position. Figure 2 One switching mechanism 20 drives the corresponding moving contact to the ready-to-close position, and the other switching mechanism 20 drives the corresponding moving contact to the ready-to-open position. For ease of illustration, the following is described by way of example with Figure 1 The left switching mechanism 20 drives the corresponding moving contact 32 to the closed limit position, and the right switching mechanism 20 drives the corresponding moving contact 32 to the open limit position. Accordingly, Figure 2 The left switching mechanism 20 drives the corresponding moving contact 32 to the ready-to-open position, and the right switching mechanism 20 drives the corresponding moving contact 32 to the ready-to-close position. It can be understood that in some alternative embodiments, it can also be that Figure 1 The left switching mechanism 20 drives the corresponding moving contact 32 to the open limit position, and the right switching mechanism 20 drives the corresponding moving contact 32 to the closed limit position.

[0030] In some embodiments, the two switching mechanisms 20 are similar in structure, and the two contact assemblies 30 are similar in structure. The following is described by way of example with Figures 3 to 7 one switching mechanism 20 and one contact assembly 30.

[0031] The contact assembly 30 includes a movable contact holder 31, a movable contact 32, and a stationary contact 34. The movable contact holder 31 is rotatably arranged on a pivot 33, and the movable contact holder 31 is connected to a load terminal, for example, by a lanyard, and the load terminal is connected to an electrical device. The movable contact 32 extends from the movable contact holder 31. The stationary contact 34 is configured to be connected to a line terminal 35, for example, by another lanyard (not shown in the drawings), and the line terminal 35 is connected to a corresponding power supply or backup power supply. In some embodiments, the stationary contact 34 can be pivotally connected to a suitable holder of the dual power transfer switch 100 by a pivot (not labeled in the drawings), and the stationary contact 34 can be elastically biased by a contact pressure member (not shown in the drawings).

[0032] The movable contact holder 31 and the movable contact 32 thereon can be rotated between an open limit position and a closed limit position to enable the contact assembly 30 to switch between an open state and a closed state. When the contact assembly 30 is in the open state, the movable contact 32 is kept 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 movable contact 32 is kept in abutment with the stationary contact 34, and the power supply connected to the stationary contact 34 supplies power to the load.

[0033] The rotation of the movable contact 32 between the open limit position and the closed limit position is driven by an opening and closing mechanism 20. The opening and closing mechanism 20 includes, for example, a driving member 21, a first pivot 22, an output assembly 23, a mounting seat 24, two driving shafts 25, two driving springs 26, two levers 27, two positioning pins 28, and a stopper assembly 29.

[0034] Referring to Figure 5 In some embodiments, the mounting seat 24 is U-shaped and includes a second connecting plate 242 and two opposite mounting plates 241 connected by the second connecting plate 242. The middle portions of the two mounting plates 241 are pivotally connected to the first pivot 22. The two driving shafts 25 are a first driving shaft 251 and a second driving shaft 252, and the two driving shafts 25 are connected to the two mounting plates 241 of the mounting seat 24 and are located on both sides of the first pivot 22. In some embodiments, the axes of the two driving shafts 25 and the axis of the first pivot 22 are in the same plane.

[0035] Referring to Figure 5 In some embodiments, the driving member 21 is U-shaped and includes a first connecting plate 213 and two opposite driving plates 214 connected by the first connecting plate 213. The two mounting plates 241 are located outside the two driving plates 214 of the driving member 21. Each driving plate 214 is pivotally connected to the first pivot 22 at an end close to the first connecting plate 213, so that the driving member 21 is pivotally connected to the mounting seat 24 by the first pivot 22.

[0036] Each driving plate 214 is formed with a buckle portion 2143 at an end away from the first connecting plate 213. Each driving plate 214 is formed with a first clamping slot 2141 (see Figure 3 ) at one side thereof, and formed with a second clamping slot 2142 (see Figure 4 ) at the other side thereof.

[0037] Referring to Figure 5 , in some embodiments, the output assembly 23 comprises an output shaft 231 and a toggle arm 232. The first end of the output shaft 231 is connected with the two driving plates 214 of the driving member 21, and the output shaft 231 is parallel to the first pivot 22. The second end of the output shaft 231 is connected with the first end of the toggle arm 232, and the second end of the toggle arm 232 is connected with the movable contact holder 31 in a non-rotatable manner. Thus, when the driving member 21 rotates around the axis of the first pivot 22, the movable contact holder 31 is driven to rotate around the axis of the pivot 33 by the output assembly 23, so as to make the movable contact 32 and the fixed contact 34 abut or separate. It can be understood that the rotation of the driving member 21 and the rotation of the movable contact holder 31 are synchronous. The axis of the first pivot 22 and the axis of the pivot 33 coincide.

[0038] The two driving springs 26 comprise a first spring 261 and a second spring 262. The two rods 27 comprise a first rod 271 and a second rod 272, and the two positioning pins 28 comprise a first positioning pin 281 and a second positioning pin 282.

[0039] The first end of the first rod 271 is located between the two mounting plates 241 and is pivotally connected with the first driving shaft 251. The second end of the first rod 271 is provided with an elongated hole 2710. The first positioning pin 281 is positioned on the holder 10 and is threaded in the elongated hole 2710. The first spring 261 is sleeved on the first rod 271 and is clamped between the first driving shaft 251 and the first positioning pin 281. The first end of the second rod 272 is located between the two mounting plates 241 and is pivotally connected with the second driving 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 holder 10 and is threaded in the elongated hole 2720. The second spring 262 is sleeved on the second rod 272 and is clamped between the second driving shaft 252 and the second positioning pin 282.

[0040] The stopper assembly 29 comprises two stoppers 291 and a driving device 293. The two stoppers 291 are respectively a first stopper 2911 and a second stopper 2912, which are pivotally connected to the bracket 10, for example. The first stopper 2911 and the second stopper 2912 are arranged at intervals along the rotation track of the clasp portion 2143 of the driving member 21. The first stopper 2911 and the second stopper 2912 have a stop position and a retreat position, respectively. The first stopper 2911 and the second stopper 2912 are kept in the stop position by a retaining mechanism (not shown) to prevent the clasp portion 2143 from rotating beyond the adjacent stopper 291 by accident. The first stopper 2911 and the second stopper 2912 can be rotated to the retreat position by the driving of the driving device 293 to allow the clasp portion 2143 to rotate beyond the respective stopper 291.

[0041] For example, in some embodiments, the first stopper 2911 and the second stopper 2912 each comprise a shaft, which is pivotally connected to the bracket 10, for example, about its own axis. Two recesses 2910 (see Figure 8 ) are arranged on the first stopper 2911 and the second stopper 2912, respectively. When the first stopper 2911 and the second stopper 2912 are in the stop position, the first stopper 2911 or the second stopper 2912 can abut against the clasp portion 2143 of the two driving plates 214 of the driving member 21, thereby preventing the clasp portion 2143 from continuing to rotate beyond the first stopper 2911 or the second stopper 2912. When the first stopper 2911 and the second stopper 2912 are in the retreat position, the first stopper 2911 and the second stopper 2912 retreat from the clasp portion 2143 of the two driving plates 214 of the driving member 21 through the respective recesses 2910, so that the clasp portion 2143 can continue to rotate beyond the first stopper 2911 and the second stopper 2912, thereby allowing the driving member 21 to drive the movable contact 32 to approach or move away from the static contact 34.

[0042] In some embodiments, the first stopper 2911 and the second stopper 2912 can be respectively provided with an operating portion 2913. The driving device 293 comprises a telescopic rod 2931, for example, which is used to apply force to the two operating portions 2913 to drive the first stopper 2911 and the second stopper 2912 to rotate from the stop position to the retreat position.

[0043] The working process of the opening and closing mechanism 20 will be described below in conjunction with Figures 3 to 7 .

[0044] Reference is made to Figure 3, the telescopic rod 2931 is extended and drives the two operation parts 2913, so that the first stop part 2911 and the second stop part 2912 rotate to the avoiding position and do not interfere with the rotation of the respective clasp parts 2143 of the driving part 21. The two driving springs 26 (the first spring 261 and the second spring 262) have been released from the compressed state, exert a torque on the mounting base 24 by pushing the two driving shafts 25, and drive the driving part 21 to rotate in the direction S4 around the axis of the first pivot 22 to the open limit position of the movable contact 32 by means of the clamping of the second driving shaft 252 and the second clamping groove 2142 of the driving part 21. It can be understood that at this time, the contact assembly 30 is in the open state, and the driving part 21 and the mounting base 24 are also in the respective open limit positions.

[0045] Referring to Figures 3 to 5 , in order to facilitate the contact assembly 30 in the open state to quickly close when needed. After the movable contact 32 rotates to the open limit position, the movable contact 32 is driven to the ready-to-close position. Specifically, first, the telescopic rod 2931 is retracted, and the first stop part 2911 and the second stop part 2912 both return to the stop position. Then, the driving mechanism 50 (the structure of the driving mechanism 50 will be described below) exerts a torque on the mounting base 24 through the two driving shafts 25, drives the mounting base 24 to rotate around the first pivot 22 in the direction S3, and the first spring 261 and the second spring 262 are compressed.

[0046] When the first spring 261 and the second spring 262 are compressed to the shortest distance, the mounting base 24 reaches the dead point position. At this dead point position, the force exerted by the first spring 261 on the mounting base 24 through the axis of the first pivot 22, and the force exerted by the second spring 262 on the mounting base 24 through the axis of the first pivot 22, the first spring 261 and the second spring 262 cannot push the mounting base 24 to rotate. Under the drive of the driving mechanism 50, the mounting base 24 passes through the dead point position.

[0047] Referring to Figure 4 and Figure 5When the mounting base 24 passes the dead point position, the two driving springs 26 (the first spring 261 and the second spring 262) are released from the compressed state, apply torque to the mounting base 24 by pushing the two driving shafts 25, and drive the driving member 21 to continue rotating in the direction S3 about the axis of the first pivot 22 by means of the clamping of the first driving shaft 251 and the first clamping groove 2141 of the driving member 21, until the movable contact 32 abuts against the first stop piece 2911 in the stop position. At this time, the driving member 21 is clamped between the first stop piece 2911 and the first driving shaft 251, thereby keeping the movable contact 32 in the ready-to-close position. It can be understood that when the movable contact 32 rotates between the open limit position and the ready-to-close position, the movable contact 32 keeps away from the corresponding stationary contact 34, and the contact assembly 30 keeps in the open state. When the movable contact 32 keeps in the ready-to-close position, the driving member 21 and the mounting base 24 also keep in the respective ready-to-close positions.

[0048] Referring to Figure 6 When it is needed to close, the telescopic rod 2931 is extended and drives the two operation parts 2913, so that the first stop piece 2911 and the second stop piece 2912 rotate to the avoiding position without interfering with the rotation of the respective clasp parts 2143 of the driving member 21. The two driving springs 26 (the first spring 261 and the second spring 262) continue to be released from the compressed state, apply torque to the mounting base 24 by pushing the two driving shafts 25, and drive the driving member 21 to continue rotating in the direction S3 about the axis of the first pivot 22 by means of the clamping of the first driving shaft 251 and the first clamping groove 2141 of the driving member 21, until the movable contact 32 rotates to the close limit position and abuts against the stationary contact 34. It can be understood that at this time, the contact assembly 30 is in the closed state, and the driving member 21 and the mounting base 24 also keep in the respective close limit positions.

[0049] Referring to Figure 6 and Figure 7 In order to facilitate the contact assembly 30 in the closed state to quickly open when needed, after the movable contact 32 rotates to the close limit position, the movable contact 32 is driven to the ready-to-open position. The process of driving the movable contact 32 to the ready-to-open position is similar to the process of driving the movable contact 32 to the ready-to-close position described above.

[0050] Specifically, first, the first stop piece 2911 and the second stop piece 2912 are returned to the stop position, and then the driving mechanism 50 applies torque to the mounting base 24 by the two driving shafts 25, drives the mounting base 24 to rotate in the direction S4 about the first pivot 22, so that the mounting base 24 passes the dead point position. Referring to Figure 7When the mounting seat 24 passes the dead point position, the two drive springs 26 are released from the compressed state, and the torque is applied to the mounting seat 24 by pushing the two drive shafts 25, and by means of the clamping of the second drive shaft 252 and the second clamping groove 2142 of the driving member 21, the driving member 21 is continuously rotated around the axis of the first pivot 22 in the direction S4 until abutting against the second stop piece 2912 in the stop position. At this time, the driving member 21 is clamped between the second stop piece 2912 and the second drive shaft 252, thereby keeping the movable contact 32 in the ready opening position. It can be understood that when the movable contact 32 rotates between the closed limit position and the ready opening position, the stationary contact 34 keeps abutting against the movable contact 32 under the elastic biasing force of the contact pressure member, so that the contact assembly 30 is kept in the closed state. When the movable contact 32 is kept in the ready opening position, the driving member 21 and the mounting seat 24 are also kept in the respective ready opening positions. It can be understood that when the first stop piece 2911 and the second stop piece 2912 are driven to the avoiding position, the opening and closing mechanism 20 and the contact assembly 30 return to the state shown in FIG. 1. Figure 3

[0051] Referring back to Figure 1 It can be understood that when the movable contact 32 rotates between the closed limit position and the ready opening position, the stationary contact 34 keeps abutting against the movable contact 32 under the elastic biasing force of the contact pressure member, so that the contact assembly 30 is kept in the closed state. When the movable contact 32 is kept in the ready opening position, the driving member 21 and the mounting seat 24 are also kept in the respective ready opening positions. It can be understood that when the first stop piece 2911 and the second stop piece 2912 are driven to the avoiding position, the opening and closing mechanism 20 and the contact assembly 30 return to the state shown in FIG. 1. Figure 2 When the mounting seat 24 passes the dead point position, the two drive springs 26 are released from the compressed state, and the torque is applied to the mounting seat 24 by pushing the two drive shafts 25, and by means of the clamping of the second drive shaft 252 and the second clamping groove 2142 of the driving member 21, the driving member 21 is continuously rotated around the axis of the first pivot 22 in the direction S4 until abutting against the second stop piece 2912 in the stop position. At this time, the driving member 21 is clamped between the second stop piece 2912 and the second drive shaft 252, thereby keeping the movable contact 32 in the ready opening position. It can be understood that when the movable contact 32 rotates between the closed limit position and the ready opening position, the stationary contact 34 keeps abutting against the movable contact 32 under the elastic biasing force of the contact pressure member, so that the contact assembly 30 is kept in the closed state. When the movable contact 32 is kept in the ready opening position, the driving member 21 and the mounting seat 24 are also kept in the respective ready opening positions. It can be understood that when the first stop piece 2911 and the second stop piece 2912 are driven to the avoiding position, the opening and closing mechanism 20 and the contact assembly 30 return to the state shown in FIG. 1.

[0052] In particular, referring to Figure 2 ​, the mounting seat 24 of the left side of the opening and closing mechanism 20 rotates through the dead point position along the direction S1, and under the action of the two driving springs 26, the lower driving shaft 25 quickly abuts against the corresponding clamping groove (for example, the second clamping groove 2142 described above) on the driving piece 21, and quickly pushes the buckle part 2143 of the driving piece 21 to the position abutting against the lower stop piece 291. After the mounting seat 24 of the right side of the opening and closing mechanism 20 rotates through the dead point position along the direction S2, under the action of the two driving springs 26, the upper driving shaft 25 quickly abuts against the corresponding clamping groove (for example, the first clamping groove 2141 described above) on the driving piece 21, and quickly pushes the buckle part 2143 of the driving piece 21 to the position abutting against the upper stop piece 291.

[0053] After the mounting seat 24 of each opening and closing mechanism 20 rotates through the dead point position, the two driving shafts 25 quickly push the corresponding driving piece 21 to the position ready for opening or closing under the action of the two driving springs 26. When each driving piece 21 moves to the position ready for opening or closing, it will collide with the corresponding stop piece 291, which may cause the stop piece 291 to break.

[0054] To reduce the risk of breaking the stop piece 291, the double power transfer switch 100 provided by the embodiments of the present disclosure is configured with the driving mechanism 50 described above and the buffering mechanism 60. The driving mechanism 50 is used to drive the mounting seat 24 to smoothly pass through the dead point position, and the buffering mechanism 60 is used to consume part of the impact energy caused by the two driving springs 26 before the driving piece 21 collides with the corresponding stop piece 291 after the mounting seat 24 passes through the dead point position, thereby greatly reducing the impact on the stop piece 291.

[0055] For reference, Figure 1 and Figure 9 In some embodiments, the driving mechanism 50 includes a driving wheel 51 and two driven wheels 52. The driving wheel 51 is pivotally connected to a second pivot shaft 53 and can rotate clockwise or counterclockwise under the driving of an external force. The two driven wheels 52 are located on the two sides of the driving wheel 51 and correspond to the two opening and closing mechanisms 20. Each driven wheel 52 is pivotally connected to the first pivot shaft 22 of the corresponding opening and closing mechanism 20. Each driven wheel 52 has a gear part 522, which directly or indirectly meshes with the driving wheel 51, so that the two driven wheels 52 are driven by the same driving wheel 51.

[0056] Each driven wheel 52 is provided with two driving parts 521, which are used to cooperate with the two driving shafts 25 of the corresponding opening and closing mechanism 20 to drive the mounting seat 24 to pass through the dead point position, thereby allowing the mounting seat 24 to rotate to the position ready for opening or closing under the driving of the two driving springs 26.

[0057] In some embodiments, the periphery of the driven wheel 52 comprises the gear portion 522 and two driving portions 521 located on both sides of the gear portion 522. Each driving portion 521 comprises a first sector-shaped recess for accommodating the corresponding driving shaft 25. The two end walls 5211 of the first sector-shaped recess of each driving portion 521 selectively push the corresponding driving shaft 25 to pass through the dead point position.

[0058] The buffering mechanism 60 comprises a buffering piece 61 and an elastic retaining piece 62. The buffering piece 61 is pivotally connected with the second pivot 53 and can rotate between a first position and a second position. The elastic retaining piece 62 is used to retain the buffering piece 61 in the first position or the second position. The buffering piece 61 comprises two abutting structures 611, each of which comprises a first abutting portion 6111 and a second abutting portion 6112.

[0059] Referring to Figure 9 and Figure 10 , in some embodiments, the buffering piece 61 comprises a ring portion 612, two abutting structures 611 extending in opposite directions from the ring portion 612, and an extension arm 613. The ring portion 612 is sleeved on the second pivot 53. The two abutting structures 611 correspond to the two opening and closing mechanisms 20. Each abutting structure 611 is V-shaped, and the V-shaped abutting structure 611 comprises two foot portions away from the ring portion 612, which form the first abutting portion 6111 and the second abutting portion 6112. The extension arm 613 extends from the ring portion 612 and is located between the two abutting structures 611. The extension arm 613 is connected with the elastic retaining piece 62. The elastic retaining piece 62 is, for example, a spring, one end of which can be connected with the support 10, and the other end of which is connected with one end of the extension arm 613 away from the ring portion 612.

[0060] Referring to Figures 11 to 14 , the process that the mounting seats 24 of the two opening and closing mechanisms 20 are respectively rotated back through the dead point position and are ready to be in the opening position / ready to be in the closing position is shown.

[0061] Referring to Figure 1 , Figure 11 and Figure 12 , when it is needed to change the two driving pieces 21 shown in Figure 1 into the opening position and the closing position respectively, that is, to change the two mounting seats 24 into the opening position and the closing position respectively, the driving wheel 51 is rotated in the counterclockwise direction, the left driven wheel 52 is pushed to rotate in the direction S1, and the right driven wheel 52 is pushed to rotate in the direction S2. Figure 1In the middle, the buffer 61 is kept in the first position by the elastic retainer 62. At this time, the first abutting part 6111 of the left abutting structure 611 is located on the rotation track of the first drive shaft 251 of the left opening and closing mechanism 20. The second abutting part 6112 of the right abutting structure 611 is located on the rotation track of the second drive shaft 252 of the right opening and closing mechanism 20.

[0062] Continuing to refer to Figure 1 For the left opening and closing mechanism 20, the two drive shafts 25 (the first drive shaft 251 and the second drive shaft 252) are pushed by the two end walls 5211 of the two drive parts 521 of the left driven wheel 52, so that the mounting seat 24 rotates to the dead point position and passes through the dead point position. As shown in Figure 11 and Figure 12 When the mounting seat 24 passes through the dead point position, that is, continues to rotate in the direction S1 driven by the elastic restoring force of the two drive springs 26, the upper first drive shaft 251 collides with the first abutting part 6111 of the left abutting structure 611, which can consume most of the energy released by the two drive springs 26 of the left opening and closing mechanism 20.

[0063] Continuing to refer to Figure 1 For the right opening and closing mechanism 20, the two drive shafts 25 (the first drive shaft 251 and the second drive shaft 252) are pushed by the two end walls 5211 of the two drive parts 521 of the right driven wheel 52, so that the mounting seat 24 rotates to the dead point position and passes through the dead point position. As shown in Figure 11 and Figure 12 When the mounting seat 24 passes through the dead point position, that is, continues to rotate in the direction S2 driven by the elastic restoring force of the two drive springs 26, the lower second drive shaft 252 collides with the second abutting part 6112 of the right abutting structure 611, which can consume most of the energy released by the two drive springs 26 of the right opening and closing mechanism 20.

[0064] Referring to Figure 13 and Figure 14 After driving each mounting seat 24 to pass through the dead point position, the driving wheel 51 continues to push the two driven wheels 52 to rotate. After the two drive shafts 25 (the left first drive shaft 251 and the right second drive shaft 252) of the two opening and closing mechanisms 20 and the two abutting parts (the left first abutting part 6111 and the right second abutting part 6112) of the buffer 61 collide, the driven wheel 52 in rotation can push the buffer 61 to rotate from the first position to the second position through a suitable structure.

[0065] It can be understood that in some embodiments, the buffer 61 has a dead point position between the first position and the second position. The driven wheel 52 can push the buffer 61 from the first position to the dead point position through a suitable structure, and then the buffer 61 can be rotated to the second position under the driving of the elastic restoring force of the elastic retainer 62. After that, the buffer 61 can be kept in the second position by the elastic retainer 62.

[0066] At this time, the first abutting portion 6111 of the abutting structure 611 on the left side moves out of the rotation path of the first drive shaft 251 on the left side, and the second abutting portion 6112 is located on the rotation track of the second drive shaft 252 on the left side. The second abutting portion 6112 of the abutting structure 611 on the right side moves out of the rotation path of the second drive shaft 252 on the right side, and the first abutting portion 6111 is located on the rotation track of the first drive shaft 251 on the right side. Thus, the mounting seat 24 of the split and closed brake mechanism 20 on the left side is allowed to move to the ready-to-open position under the action of the two drive springs 26, and the mounting seat 24 of the split and closed brake mechanism 20 on the right side is allowed to move to the ready-to-close position under the action of the two drive springs 26.

[0067] From the above, when the mounting seat 24 of the split and closed brake mechanism 20 on the left side moves to the ready-to-open position, the driving piece 21 moves to the ready-to-open position abutting against the second stop piece 2912. Although collision will also occur when the driving piece 21 abuts against the second stop piece 2912, after the collision buffering of the first drive shaft 251 and the first abutting portion 6111, the force of the collision between the driving piece 21 and the second stop piece 2912 is greatly reduced, thereby facilitating the avoidance of damage to the second stop piece 2912. Similarly, when the mounting seat 24 of the split and closed brake mechanism 20 on the right side moves to the ready-to-close position, the driving piece 21 moves to the ready-to-close position abutting against the first stop piece 2911. Although collision will also occur when the driving piece 21 abuts against the first stop piece 2911, after the collision buffering of the second drive shaft 252 and the second abutting portion 6112, the force of the collision between the driving piece 21 and the first stop piece 2911 is greatly reduced, thereby facilitating the avoidance of damage to the first stop piece 2911.

[0068] Referring back to Figure 2 When the stop pieces 291 of the split and closed brake mechanisms 20 on the left and right sides are all rotated to the avoiding position, the mounting seat 24 and the driving piece 21 on the left side can be rotated to the open limit position under the driving of the corresponding two drive springs 26, and the two drive shafts 25 on the left side slide from one end to the other end of the drive portion 521; and the mounting seat 24 and the driving piece 21 on the right side are correspondingly rotated to the closed limit position under the driving of the corresponding two drive springs 26, and the two drive shafts 25 on the right side slide from one end to the other end of the drive portion 521.

[0069] The process of rotating the mounting seat 24 of the left split and close mechanism 20 from the split limit position to the ready close position can refer to the process of rotating the mounting seat 24 of the right split and close mechanism 20 from the split limit position to the ready close position described above. The process of rotating the mounting seat 24 of the right split and close mechanism 20 from the close limit position to the ready split position can refer to the process of rotating the mounting seat 24 of the left split and close mechanism 20 from the close limit position to the ready split position described above, which will not be repeated here. It can be understood that when the left mounting seat 24 is in the split limit position and the right mounting seat 24 is in the close limit position, the driving wheel 51 rotates clockwise to drive the left split and close mechanism 20 through the dead center position to the ready close position through the dead center position, and to drive the right split and close mechanism 20 through the dead center position to the ready split position. With the rotation of the two mounting seats 24 to the ready close position / ready split position, the buffer 61 is correspondingly rotated from the second position to the first position.

[0070] Referring to Figure 12 In some embodiments, when the two driving shafts 25 (for example, the first driving shaft 251 on the left and the second driving shaft 252 on the right) of the two split and close mechanisms 20 collide with the corresponding abutting portions (for example, the first abutting portion 6111 on the left and the second abutting portion 6112 on the right) of the buffer 61, the two driving shafts 25 apply forces to the buffer 61 in opposite directions and with substantially the same magnitude, which is beneficial to improve the stress condition of the second pivot 53.

[0071] In some embodiments, when any driving shaft 25 and the corresponding first abutting portion 6111 or second abutting portion 6112 abut, the driving shaft 25 applies a force to the buffer 61 in a direction deviating from the axis of the second pivot 53. That is, the driving shaft 25 applies a torque to the buffer 61 around the second pivot 53, and the direction of the torque is opposite to the direction of the torque on the buffer 61 from the driven wheel 52. In this way, when the driving shaft 25 collides with the buffer 61, the collision force can immediately push the buffer 61 out of the rotation track of the driving shaft 25, and the desired buffering effect cannot be achieved.

[0072] Referring to Figure 10 , Figure 13 and Figure 15In some embodiments, the surface of the buffer 61 is provided with a convex column 614, the gear portion 522 is provided with a second sector-shaped recess 5221 facing the surface of the buffer 61, and the convex column 614 is accommodated in the second sector-shaped recess 5221. Two end walls 5222 of the second sector-shaped recess 5221 selectively abut against the convex column 614 to drive the buffer 61 to rotate from one of the first position and the second position to the other. Of course, there are many other embodiments in which the driven gear 52 drives the buffer 61 to rotate between the first position and the second position, and the above examples are not limiting.

[0073] In embodiments according to the present disclosure, during rotation of the drive member 21 and the mounting seat 24 to the ready opening position or the ready closing position, one of the two drive shafts 25 on the mounting seat 24 first collides with the corresponding abutting portion of the buffer 61, and then the drive member 21 abuts against the corresponding stopper 291, and the mounting seat 24 and the drive member 21 reach the ready opening position or the ready closing position. Since the collision of the drive shaft 25 with the corresponding abutting portion of the buffer 61 can consume most of the energy released by the two drive springs 26, when the drive member 21 rotates to the ready opening position or the ready closing position and collides with the corresponding stopper 291, the impact force between the drive member 21 and the stopper 291 is greatly reduced. Thus, damage to the stopper 291 due to a large impact can be effectively avoided, thereby improving the reliability of the dual power transfer switch 100.

[0074] The above has described embodiments of the present disclosure, and the above description is exemplary and is not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements in the art, or to enable other ordinary skilled persons in the art to understand the embodiments disclosed herein.

Claims

1. A dual power transfer switch (100), characterized in that, The double power transfer switch (100) comprises: a switching mechanism (20) comprising: a mounting base (24) pivotally connected with a first pivot (22) and having a dead point position, a preparation opening position and a preparation closing position; and two driving shafts (25) mounted on the mounting base (24) and located on both sides of the first pivot (22); a driving mechanism (50) comprising: a driving wheel (51) pivotally connected with a second pivot (53); and a driven wheel (52) driven by the driving wheel (51) and pivotally connected with the first pivot (22), the driven wheel (52) is provided with two driving portions (521) for cooperating with the two driving shafts (25) to drive the mounting base (24) to pass through the dead point position; and a buffer mechanism (60) comprising: a buffer (61) pivotally connected with the second pivot (53) and capable of rotating between a first position and a second position, the buffer (61) comprises an abutting structure (611) comprising a first abutting portion (6111) and a second abutting portion (6112), wherein, during rotation of the mounting base (24) from the dead point position to the preparation opening position or the preparation closing position, one of the two driving shafts (25) abuts one of the first abutting portion (6111) and the second abutting portion (6112), and then the buffer (61) is driven by the driven wheel (52) to rotate from one of the first position and the second position to the other position to allow the mounting base (24) to rotate to the preparation opening position or the preparation closing position; and a resilient retaining member (62) for retaining the buffer (61) in the first position or the second position.

2. The double power transfer switch (100) according to claim 1, wherein: the double power transfer switch (100) is provided with two switching mechanisms (20); the driving mechanism (50) is provided with two driven wheels (52) located on both sides of the driving wheel (51), and the two driven wheels (52) correspond to the two switching mechanisms (20), and each driven wheel (52) is pivotally connected with the first pivot (22) of the corresponding switching mechanism (20); and the buffer (61) comprises two abutting structures (611) corresponding to the two switching mechanisms (20).

3. The dual power transfer switch (100) of claim 2, characterized in that The buffer (61) comprises: an annular portion (612) sleeved on the second pivot (53); two abutting structures (611) extending in opposite directions from the annular portion (612), and each abutting structure (611) is V-shaped, and two feet of the abutting structure (611) form the first abutting portion (6111) and the second abutting portion (6112); and An extension arm (613) extends from the annular portion (612) and is located between the two abutting structures (611), the extension arm (613) is connected with the elastic retaining member (62).

4. The dual power transfer switch (100) of claim 3, characterized in that The elastic retaining member (62) is a spring, one end of the spring is connected with the support (10), and the other end is connected with one end of the extension arm (613) away from the annular portion (612).

5. The dual power transfer switch (100) according to any one of claims 1 to 4, characterized in that When one of the two drive shafts (25) abuts with one of the first abutting portion (6111) and the second abutting portion (6112), the drive shaft (25) applies a torque to the buffer (61) to rotate around the second pivot (53).

6. The dual power transfer switch (100) according to any one of claims 1 to 4, characterized in that, the periphery of the driven wheel (52) comprises a gear portion (522) and the two drive portions (521) located on both sides of the gear portion (522), the gear portion (522) is in meshing cooperation with the driving wheel (51), and each drive portion (521) comprises a first sector recess for accommodating the corresponding drive shaft (25), and the two end walls (5211) of the first sector recess of each drive portion (521) selectively push the corresponding drive shaft (25) to pass through the dead point position.

7. The dual power transfer switch (100) according to claim 6, characterized in that, the surface of the buffer (61) is provided with a protruding column (614), the gear portion (522) is provided with a second sector recess (5221) facing the surface of the buffer (61), the protruding column (614) is accommodated in the second sector recess (5221), and the two end walls (5222) of the second sector recess (5221) selectively abut with the protruding column (614) to drive the buffer (61) to rotate from one of the first position and the second position to the other.

8. The dual power transfer switch (100) according to any one of claims 1 to 4, characterized in that The opening and closing mechanism (20) further comprises: two drive springs (26) applying torque to the mounting seat (24) through the two drive shafts (25); and a driving member (21) pivotally connected with the first pivot (22), which can be selectively driven by the two drive shafts (25) and stopped by a stopper assembly (29) to keep the mounting seat (24) in the ready opening position or the ready closing position.

9. The dual power transfer switch (100) of claim 8, characterized in that The driving member (21) is connected with a movable contact support (31) through an output assembly (23) for driving the movable contact support (31) to rotate to make a movable contact (32) on the movable contact support (31) abut with or separate from a corresponding stationary contact (34).

10. The dual power transfer switch (100) according to claim 8, characterized in that, the stopper assembly (29) comprises two stoppers (291) arranged at intervals along the rotation track of the driving member (21), and each stopper (291) can rotate to a stopping position or a avoiding position, and When the mounting seat (24) is in the ready-to-open position or the ready-to-close position, the driving member (21) is stopped by one of the two stop pieces (291) in the stop position.

Images