Dual-power change-over switch

Abstract

The embodiment of the utility model provides a dual-power change-over switch. The dual-power change-over switch comprises a support. The main spring assembly is rotatably arranged on the bracket; the driving assembly is coupled to the bracket and is matched with the main spring assembly so as to rotate relative to the bracket under the driving of the main spring assembly; the moving contact assembly is coupled to the driving assembly and is suitable for being driven by the driving assembly; and the buffer piece is rotatably arranged on the support, and the buffer piece is located on the rotating path of the driving assembly so as to buffer the driving assembly.

Description

TECHNICAL FIELD

[0001] Embodiments of the present disclosure generally relate to the technical field of electrical equipment, and more particularly, to dual power transfer switches. BACKGROUND

[0002] The paired main spring assembly in the dual power transfer switch needs to store energy in advance and keep in the position ready to close or ready to open. When receiving the transfer signal, the paired main spring assembly releases quickly according to the sequence and drives the corresponding driving member to act, and the corresponding driving member drives the corresponding moving contact assembly to move to switch between the main power supply and the standby power supply.

[0003] In some application scenarios, the contact switching time of the dual power transfer switch is required to be short, and the strength of the related moving parts is a great challenge in such a short time range to complete the switching. CONTENT OF THE UTILITY MODEL

[0004] In one aspect of the present disclosure, a dual power transfer switch is provided, which includes a bracket, a main spring assembly rotatably disposed on the bracket, a driving assembly coupled to the bracket and cooperating with the main spring assembly to rotate relative to the bracket under the driving of the main spring assembly, a moving contact assembly coupled to the driving assembly and adapted to be driven by the driving assembly, and a buffer rotatably disposed on the bracket and located on the rotation path of the driving assembly to buffer the driving assembly.

[0005] According to embodiments of the present disclosure, when the driving assembly drives the moving contact assembly to switch to the closed position, the buffer buffers the driving assembly to reduce the speed of the driving assembly, and further reduce the speed of the moving contact assembly, thereby reducing the collision speed between the contacts, avoiding the deformation or even damage of the contact contact position due to the impact, and improving the contact life. In addition, since the collision speed between the contacts is reduced, it is also beneficial to reduce the bounce amplitude of the moving contact assembly.

[0006] In some embodiments, the dual power transfer switch further includes a stationary contact assembly, and in the case that the moving contact assembly moves towards the stationary contact assembly and is spaced apart from the stationary contact assembly by a first distance, the driving assembly contacts the buffer.

[0007] In some embodiments, the first distance is in the range of 2mm to 4mm.

[0008] In some embodiments, the bracket includes a rotation shaft, and the buffer includes a rotation part, and the rotation shaft is coupled to the rotation part to make the buffer rotate around the rotation shaft between an initial position and a stop position.

[0009] In some embodiments, the buffer further comprises a matching portion, the matching portion is disposed on the rotating portion adjacent to the driving assembly, and the matching portion is located on a rotating path of the driving assembly to buffer the driving assembly.

[0010] In some embodiments, the dual power transfer switch further comprises a reset member, the buffer further comprises a connecting portion, the connecting portion is disposed on the rotating portion away from the matching portion, one end of the reset member is coupled to the support, and the other end of the reset member is coupled to the connecting portion.

[0011] In some embodiments, the support further comprises a limiting shaft, and the end of the reset member away from the connecting portion is coupled to the limiting shaft.

[0012] In some embodiments, the support further comprises at least one movable hole, and the buffer further comprises at least one stop portion coupled to the matching portion, the at least one stop portion is disposed in the at least one movable hole and is adapted to rotate in the at least one movable hole, wherein when the buffer is in the initial position, the at least one stop portion abuts with a hole wall of the at least one movable hole to be stopped by the at least one movable hole.

[0013] In some embodiments, the movable hole comprises an arc-shaped hole, and wherein during the rotation of the buffer from the initial position to the stop position, a rotation distance of the stop portion is less than an arc length of the arc-shaped hole.

[0014] In some embodiments, the at least one movable hole comprises a pair of movable holes, the at least one stop portion comprises a pair of stop portions, and the pair of stop portions are distributed along an axial direction of the rotating shaft.

[0015] It should be understood that the content described in this section 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 some embodiments thereof with reference to the attached drawings in which:

[0017] Figure 1 and Figure 2 Fig. 1 shows a partial structural schematic diagram of a dual power transfer switch according to some embodiments of the present disclosure;

[0018] Figure 3Structural schematic diagrams of a main spring assembly, a driving assembly, a static contact assembly, a dynamic contact assembly, and a crank are shown according to some embodiments of the present disclosure.

[0019] Figure 4 An enlarged schematic diagram of the A part of the dual power transfer switch is shown. Figure 2 An enlarged schematic diagram of the A part of the dual power transfer switch is shown.

[0020] Figure 5 And Figure 6 A working state schematic diagram of the dual power transfer switch according to some embodiments of the present disclosure is shown.

[0021] Legend of reference signs:

[0022] 100 is a dual power transfer switch;

[0023] 1 is a support, 11 is a rotating shaft, 12 is a movable hole, and 13 is a limiting shaft;

[0024] 2 is a main spring assembly; 3 is a driving assembly;

[0025] 4 is a buffer, 41 is a rotating part, 42 is a matching part, 43 is a connecting part, and 44 is a stop part;

[0026] 5 is a static contact assembly; 6 is a dynamic contact assembly; 7 is a reset part; and 8 is a crank. DETAILED DESCRIPTION

[0027] Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure is more thoroughly and completely conveyed to those skilled in the art, and the scope of the present disclosure is fully conveyed to those skilled in the art.

[0028] The term “comprising” and variations thereof as used herein indicate an open-ended inclusion of also items which do not “comprise”, “contain” or “consist of” the recited steps or components. The term “or” means “and / or” unless stated otherwise. The term “based on” means “based at least in part on”. The terms “one example embodiment” and “an embodiment” mean “at least one example embodiment”. The term “another embodiment” means “at least one additional embodiment”. The terms “first”, “second”, etc. can refer to different or identical objects.

[0029] As described above, in some applications, the contact switching time of dual power transfer switches is required to be very short. Completing the switching within such a short time range puts a great strain on the strength of the related moving parts. For example, due to the fast contact closing speed, the contact points are easily impacted and deformed or even damaged, thus affecting the product's service life. Furthermore, the fast contact closing speed can increase the bounce amplitude of the moving contact assembly, thereby creating a safety hazard. Embodiments of this disclosure provide a dual power transfer switch 100 to at least partially solve the above problems. In the following sections, [further details will be provided]. Figures 1 to 6 The principles of this disclosure are described.

[0030] Figure 1 and Figure 2 A partial structural schematic diagram of a dual power transfer switch 100 according to some embodiments of the present disclosure is shown. Figure 3 Schematic diagrams of the main spring assembly 2, drive assembly 3, stationary contact assembly 5, moving contact assembly 6, and crank arm 8 according to some embodiments of the present disclosure are shown. It should be noted that... Figure 2 The dual power transfer switch 100 shown has a portion of the bracket 1 removed to better illustrate its internal structure. (See attached image.) Figures 1 to 3 As shown, the dual power transfer switch 100 described herein generally includes a bracket 1, a main spring assembly 2, a drive assembly 3, a buffer 4, a stationary contact assembly 5, a moving contact assembly 6, a reset member 7, and a crank arm 8.

[0031] refer to Figures 1 to 3 In some embodiments, the main spring assembly 2 is rotatably mounted on the bracket 1. A drive assembly 3 is coupled to the bracket 1 and adapted to cooperate with the main spring assembly 2, thereby enabling the drive assembly 3 to rotate relative to the bracket 1 under the drive of the main spring assembly 2. A moving contact assembly 6 is coupled to the drive assembly 3 and adapted to be driven by the drive assembly 3. For example, refer to... Figure 3 The moving contact assembly 6 can be connected to the drive assembly 3 via the crank arm 8, thereby enabling the drive assembly 3 to drive the moving contact assembly 6 to move toward or away from the stationary contact assembly 5, so as to realize the closing and opening processes.

[0032] Return to reference Figure 2 In some embodiments, the buffer 4 is rotatably disposed on the bracket 1 and is located on the rotation path of the drive assembly 3 to buffer the drive assembly 3, thereby reducing the speed of the drive assembly 3.

[0033] According to embodiments of the present disclosure, when the drive assembly 3 drives the movable contact assembly 6 to switch to the closed position, the buffer 4 buffers the drive assembly 3 to reduce the speed of the drive assembly 3, and further reduce the speed of the movable contact assembly 6, so as to reduce the collision speed between the contacts, and avoid the contact contact position from being easily impacted to be deformed or even damaged, so as to improve the contact life. In addition, since the collision speed between the contacts is reduced, it is also beneficial to reduce the bounce amplitude of the movable contact assembly 6.

[0034] In some embodiments, the drive assembly 3 can contact the buffer 4 when the movable contact assembly 6 moves towards the stationary contact assembly 5 and is spaced apart from the stationary contact assembly 5 by a first distance. It can be understood that the moment of inertia of the buffer 4 can be greater than the moment of inertia of the drive assembly 3, for example, the moment of inertia of the buffer 4 can be 10 times the moment of inertia of the drive assembly 3, so that the buffer 4 needs to be applied with a greater torque to be driven, so as to quickly reduce the speed of the drive assembly 3, thereby avoiding the deformation or even damage of the contact.

[0035] In some embodiments, the first distance can be in the range of 2mm to 4mm. That is, the drive assembly 3 contacts the buffer 4 when the movable contact assembly 6 is adjacent to the stationary contact assembly 5. Thus, the drive assembly 3 can contact the buffer 4 at a later time, so that the drive assembly 3 can be decelerated at a later time, so as to avoid being decelerated too early to prolong the closing time, thereby ensuring the stability requirement of the system.

[0036] It should be noted that the numbers, values, numbers mentioned above and possibly mentioned elsewhere in the present disclosure are all exemplary and are not intended to limit the scope of the present disclosure in any way. Any other appropriate numbers, values, numbers are possible. For example, according to specific application scenarios and requirements, the first distance can also be in the range of 4mm to 5mm.

[0037] Figure 4 An enlarged schematic view of part A of the double power transfer switch is shown. Figure 2 As shown in part A of the double power transfer switch, the drive assembly 3 can contact the buffer 4 when the movable contact assembly 6 moves towards the stationary contact assembly 5 and is spaced apart from the stationary contact assembly 5 by a first distance. Figure 2 And Figure 4 As shown, in some embodiments, the buffer 4 can include a rotating part 41, a matching part 42, a connecting part 43, and at least one stop part 44. Correspondingly, the bracket 1 can include a rotating shaft 11. The rotating shaft 11 can be coupled to the rotating part 41. Thus, when the drive assembly 3 contacts and drives the buffer 4, the buffer 4 can rotate around the rotating shaft 11 between the initial position and the stop position.

[0038] Continuing to refer to Figure 2 And Figure 4Further, the engaging portion 42 can be disposed on the rotating portion 41 adjacent to the driving assembly 3, and the engaging portion 42 can be located on the rotating path of the driving assembly 3 to buffer the driving assembly 3. Thus, when the driving assembly 3 drives the moving contact assembly 6 to switch to the closed position, the engaging portion 42 can buffer the driving assembly 3 to reduce the speed of the driving assembly 3, and further reduce the speed of the moving contact assembly 6, so as to reduce the collision speed between the contacts, avoid the contact position from being easily impacted and deformed or even damaged, and improve the contact life. In addition, since the collision speed between the contacts is reduced, it is also beneficial to reduce the bounce amplitude of the moving contact assembly 6.

[0039] With continued reference to Figure 2 and Figure 4 Further, the connecting portion 43 can be disposed on the rotating portion 41 away from the engaging portion 42. One end of the reset member 7 can be coupled to the support 1, and the other end of the reset member 7 can be coupled to the connecting portion 43. It can be understood that in the process of driving the buffer member 4 from the initial position to the stop position by the driving assembly 3, the reset member 7 is stretched and stores energy, so that in the case of releasing the buffer member 4 by the driving assembly 3, the reset member 7 can drive the buffer member 4 to reset to the initial position, so as to make the buffer member 4 circulate.

[0040] The reset member 7 according to the embodiments of the present disclosure can be various types of reset members 7 currently known or available in the future, and the embodiments of the present disclosure are not limited thereto. For example, in some embodiments, the reset member 7 can be a spring. The reset member 7 can be coupled to the support 1 in any manner. For example, the end of the reset member 7 away from the connecting portion 43 can be coupled to the limiting shaft 13 of the support 1.

[0041] With continued reference to Figure 1 , Figure 2 and Figure 4 Further, the support 1 can further include at least one movable hole 12. At least one stop portion 44 can be coupled to the engaging portion 42, and the at least one stop portion 44 can be disposed in the at least one movable hole 12 and adapted to rotate in the at least one movable hole 12, so that the buffer member 4 can be switched between the initial position and the stop position. In the case that the buffer member 4 is in the initial position, the reset member 7 is in a stretched state, so that the buffer member 4 has a tendency to rotate clockwise. However, since the at least one stop portion 44 abuts against the hole wall of the at least one movable hole 12, and the at least one stop portion 44 can be stopped by the at least one movable hole 12, the buffer member 4 can be kept in the initial position.

[0042] With reference back to Figure 1In some embodiments, since the buffer 4 is rotatably mounted on the bracket 1, the movable hole 12 may include an arc-shaped hole, wherein during the rotation of the buffer 4 from the initial position to the stop position, the rotation distance of the stop portion 44 may be less than the arc length of the arc-shaped hole. In other words, when the buffer 4 is in the stop position, along the rotation direction of the stop portion 44, the stop portion 44 is spaced apart from the hole wall of the movable hole 12 to avoid the movable hole 12 interfering with the rotation of the buffer 4.

[0043] In other embodiments, as the buffer 4 rotates from the initial position to the stop position, the rotation distance of the stop portion 44 can also be equal to the arc length of the arc-shaped hole. In other words, when the buffer 4 is in the stop position, along the rotation direction of the stop portion 44, the stop portion 44 just contacts the wall of the movable hole 12, so as to similarly prevent the movable hole 12 from interfering with the rotation of the buffer 4.

[0044] Return to reference Figure 1 , Figure 2 as well as Figure 4 In some embodiments, at least one movable hole 12 may include a pair of movable holes 12, and correspondingly, at least one stop portion 44 may include a pair of stop portions 44. The pair of stop portions 44 may be disposed on the side of the mating portion 42 along the axial direction of the rotation shaft 11. Each pair of stop portions 44 is disposed in a corresponding movable hole 12 and adapted to rotate within the corresponding movable hole 12 so that the buffer member 4 can switch between an initial position and a stop position.

[0045] In other embodiments, at least one movable hole 12 may further include a movable hole 12, and correspondingly, at least one stop portion 44 may further include a stop portion 44. The stop portion 44 is disposed within the movable hole 12 and adapted to rotate within the movable hole 12 so that the buffer 4 can switch between an initial position and a stop position.

[0046] Figure 5 and Figure 6 A schematic diagram of the operating state of a dual power transfer switch 100 according to some embodiments of the present disclosure is shown.

[0047] like Figure 5 As shown, the main spring assembly 2 releases energy and drives the drive assembly 3 to rotate, and the drive assembly 3 does not contact the mating part 42. At this time, the buffer 4 is in its initial position under the action of the reset member 7.

[0048] like Figure 6As shown, the main spring assembly 2 continues to release energy and continues to drive the driving assembly 3 to rotate. The driving assembly 3 contacts the mating portion 42 and drives the mating portion 42, and the buffer 4 can be driven. The buffer 4 buffers the driving assembly 3 and reduces the speed of the driving assembly 3, thereby reducing the speed of the movable contact assembly 6, until the movable contact assembly 6 and the stationary contact assembly 5 are in conduction. At this time, the buffer 4 is driven to a stop position.

[0049] The buffer design according to the embodiments of the present disclosure can be applied to various dual power transfer switches to at least partially solve the above problems. It should be understood that the buffer design according to the embodiments of the present disclosure can also be applied to other electrical components, and the embodiments of the present disclosure are not limited thereto.

[0050] The above has described various embodiments of the present disclosure, and the above description is exemplary, 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 the terms used herein is intended to best explain the principles of the embodiments, practical application, or technical improvement in the market, 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 dual power transfer switch (100) comprises: a support (1); a main spring assembly (2) rotatably arranged on the support (1); a driving assembly (3) coupled to the support (1) and cooperating with the main spring assembly (2) to rotate relative to the support (1) under the driving of the main spring assembly (2); a moving contact assembly (6) coupled to the driving assembly (3) and adapted to be driven by the driving assembly (3); and a buffer (4) rotatably arranged on the support (1), and the buffer (4) is located on the rotation path of the driving assembly (3) to buffer the driving assembly (3).

2. The dual power transfer switch (100) of claim 1, characterized in that The dual power transfer switch (100) further comprises a static contact assembly (5), and in the case that the moving contact assembly (6) moves towards the static contact assembly (5) and is spaced from the static contact assembly (5) by a first distance, the driving assembly (3) contacts the buffer (4).

3. The dual power transfer switch (100) of claim 2, characterized in that The first distance is in the range of 2mm to 4mm.

4. The dual power transfer switch (100) of claim 1, wherein, The support (1) comprises a rotation shaft (11), and the buffer (4) comprises a rotation part (41), and the rotation shaft (11) is coupled to the rotation part (41) to make the buffer (4) rotate around the rotation shaft (11) between an initial position and a stop position.

5. The dual power transfer switch (100) of claim 4, characterized in that The buffer (4) further comprises a cooperating part (42) arranged on the rotation part (41) adjacent to the driving assembly (3), and the cooperating part (42) is located on the rotation path of the driving assembly (3) to buffer the driving assembly (3).

6. The dual power transfer switch (100) of claim 5, characterized in that The dual power transfer switch (100) further comprises a reset member (7), and the buffer (4) further comprises a connecting part (43) arranged on the rotation part (41) away from the cooperating part (42), one end of the reset member (7) is coupled to the support (1), and the other end of the reset member (7) is coupled to the connecting part (43).

7. The dual power transfer switch (100) of claim 6, characterized in that The support (1) further comprises a limiting shaft (13), and one end of the reset member (7) away from the connecting part (43) is coupled to the limiting shaft (13).

8. The dual power transfer switch (100) of claim 5, wherein, The support (1) further comprises at least one movable hole (12), and the buffer (4) further comprises at least one stop part (44) coupled to the cooperating part (42), the at least one stop part (44) is arranged in the at least one movable hole (12) and is adapted to rotate in the at least one movable hole (12), wherein in the case that the buffer (4) is in the initial position, the at least one stop part (44) abuts against the hole wall of the at least one movable hole (12) to be stopped by the at least one movable hole (12).

9. The dual power transfer switch (100) of claim 8, characterized in that The movable hole (12) comprises an arc-shaped hole, and in the process of rotating the buffer (4) from the initial position to the stop position, the rotation distance of the stop part (44) is less than the arc length of the arc-shaped hole.

10. The dual power transfer switch (100) of claim 8, wherein, The at least one movable hole (12) comprises a pair of movable holes (12), the at least one stop portion (44) comprises a pair of stop portions (44), and the pair of stop portions (44) are distributed along the axial direction of the rotation shaft (11).

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