Change-over switch

Abstract

The change-over switch comprises a shell and a switch pole, the switch pole comprises a rotating shaft and two groups of contact mechanisms, in a first direction, the rotating shaft is rotatably assembled between the two groups of contact mechanisms, each group of contact mechanism comprises a static contact group and a moving contact assembly, the static contact group comprises two static contacts which are arranged at intervals in a second direction, and the moving contact assembly comprises two moving contacts which are arranged at intervals in the second direction. The moving contact assembly comprises a contact support and a moving contact, the moving contact comprises at least two moving contact bridges which are arranged side by side in the third direction, each moving contact bridge is arranged on the contact support along the second direction, and a moving contact of each moving contact bridge is opposite to a static contact of the static contact at an interval in the first direction. According to the utility model, the two adjacent moving contact bridges in the same moving contact assembly are arranged side by side in the third direction, so that the number of contacts between the moving contact assembly and the static contact assembly can be increased, the two adjacent moving contact bridges are prevented from being arranged in the moving direction of the moving contact assembly at intervals, and the space occupied by the moving contact assembly in the shell is saved; and the size of the change-over switch is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of low voltage apparatus, concretely relates to a change-over switch. BACKGROUND

[0002] The change-over switch realizes the conversion of load line between two power sources, and is widely applied in various uninterrupted power supply places to ensure power supply reliability, wherein, in the existing products, the change-over switch generally realizes the conversion of normal and standby power sources by switching the opening and closing of two sets of contact mechanisms. SUMMARY

[0003] The utility model discloses a change-over switch which overcomes at least one defect of the prior art.

[0004] To achieve the above object, the utility model adopts the following technical scheme:

[0005] The utility model provides a change-over switch, including shell and switch pole setting in the shell, the switch pole includes pivot and two sets of contact mechanism, in the first direction, the pivot rotates and is assembled between two sets of contact mechanism, and each set of contact mechanism includes static contact group and dynamic contact assembly that are opposite and are spaced in the first direction, the static contact group includes two static contacts that are spaced in the second direction, the dynamic contact assembly includes contact support and dynamic contact, the contact support is driven along the first direction and carries out linear movement by the pivot, the dynamic contact includes at least two dynamic contact bridges, and the adjacent two dynamic contact bridges are side by side arranged in the third direction, and each dynamic contact bridge is arranged on the contact support along the second direction, and the dynamic contact point of each dynamic contact bridge and the static contact point of static contact are opposite and are spaced in the first direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0006] Preferably, the contact support is provided with at least one partition plate, and the adjacent two dynamic contact bridges are separated by the partition plate in the third direction.

[0007] Preferably, the contact support is provided with a mounting cavity, and the movable contact bridge is arranged in the mounting cavity in a penetrating manner, so that the movable contact of each movable contact bridge is located outside the mounting cavity.

[0008] Preferably, the edge of the movable contact bridge is provided with a clamping part, and the clamping part is clamped and limited by the contact support.

[0009] Preferably, a partition plate is arranged in the mounting cavity, the mounting cavity is divided into at least two contact cavities along a third direction by the partition plate, one movable contact bridge and one contact spring are arranged in each contact cavity, and the contact spring is located on the side of the movable contact bridge opposite to the stationary contact.

[0010] Preferably, each contact support is connected with the same rotating shaft through one linkage, and the connection positions of the two linkages on the rotating shaft are not in line with the axis of the rotating shaft.

[0011] Preferably, the rotating shaft comprises a driving shaft, two coaxial rotating discs are arranged on the driving shaft, and the two rotating discs are drivingly matched with the driving shaft, and each rotating disc is connected with the contact support through one linkage.

[0012] Preferably, a reset elastic member is further connected between each contact support and the shell, and the reset elastic member is located on the side of the contact support opposite to the rotating shaft.

[0013] Preferably, the driving shaft is provided with two split-gate pushing parts, each split-gate pushing part is matched with one linkage, when the driving shaft is rotated, one linkage is first driven by one split-gate pushing part to drive the connected rotating disc to rotate in the split-gate mode, and then another rotating disc is driven by the driving shaft to rotate in the closed-gate mode.

[0014] Preferably, the middle part of the side wall of the driving shaft is outwardly protruded to form a split-gate pushing part, the two ends of the driving shaft are drivingly connected with the two rotating discs, and one end of the linkage connected with each rotating disc is located on the rotating track of the split-gate pushing part.

[0015] Preferably, the driving shaft is provided with a driving part, the two split-gate pushing parts are symmetrically distributed on the two sides of the driving part along the circumferential direction of the driving shaft, and the rotating disc is provided with a driving groove matched with the driving part.

[0016] Preferably, each stationary contact comprises at least one stationary contact plate, one end of the stationary contact plate is arranged along the second direction and provided with a stationary contact, and the stationary contact is spaced apart from the movable contact at one end of each movable contact bridge in the first direction.

[0017] Preferably, each contact mechanism is further provided with an arc extinguishing system in a matched manner, the arc extinguishing system comprises an arc extinguishing chamber, in the first direction, the arc extinguishing chamber is arranged side by side with the matched contact mechanism, and the two arc extinguishing chambers are located on the same side of the two groups of contact mechanisms, and in the second direction, the arc extinguishing chambers of the two arc extinguishing systems are arranged in a spaced apart manner.

[0018] The utility model discloses a change-over switch, and adjacent two movable contact bridges in the same movable contact assembly are arranged side by side in the third direction, which can increase the number of contacts between the movable contact assembly and the static contact group, avoid spacing the adjacent two movable contact bridges in the moving direction of the movable contact assembly, save the space occupied by the movable contact assembly in the shell, and facilitate reducing the size of the change-over switch.

[0019] In addition, the adjacent two movable contact bridges are isolated by the partition plate, and the use safety is ensured.

[0020] In addition, each movable contact bridge is clamped with the contact support through the clamping part, and the assembly stability of the movable contact bridge and the contact support is facilitated to be ensured.

[0021] In addition, each movable contact bridge is provided with the contact spring, and the contact pressure of each movable contact bridge and the static contact is ensured.

[0022] In addition, the rotating shaft of the change-over switch is of a split type structure, is used for driving a group of contact mechanisms to be separated first, and another group of contact mechanisms to be separated later, and the use safety is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is the internal structure schematic view of the switch pole in the utility model;

[0024] Figure 2 is the structure schematic view of the movable contact assembly in the utility model;

[0025] Figure 3 is the structure schematic view of the contact support in the utility model;

[0026] Figure 4 is the structure schematic view of the movable contact bridge in the utility model;

[0027] Figure 5 is the cooperation schematic view of the rotating shaft and the contact mechanism in the utility model;

[0028] Figure 6 is the cooperation schematic view of the movable contact assembly and the rotating shaft in the utility model;

[0029] Figure 7 is the structure schematic view of the rotating shaft in the utility model;

[0030] Figure 8 is the structure schematic view of the driving shaft of the rotating shaft in the utility model;

[0031] Figure 9 is the cooperation sectional view of the rotating disc and the driving shaft in the utility model;

[0032] Reference signs:

[0033] 1 - housing, 11 - limiting portion, 2 - switch pole, 20 - terminal, 21 - rotating shaft, 211 - driving shaft, 2111 - driving portion, 2112 - opening and closing pushing portion, 212 - rotating disc, 2120 - central hole, 2121 - driving groove, 2122 - closing portion, 2123 - connecting portion, 2124 - connecting hole, 2125 - stop portion, 22 - movable contact assembly, 221 - contact support, 2210 - mounting cavity, 2211 - hinged portion, 2212 - matching portion, 2213 - partition, 2214 - insertion portion, 2215 - baffle, 222 - movable contact, 2220 - movable contact bridge, 2221 - movable contact point, 2222 - clamping portion, 223 - contact spring, 23 - stationary contact, 231 - stationary contact plate, 232 - stationary contact point, 24 - linkage, 25 - reset elastic member, 28 - arc extinguishing chamber. DETAILED DESCRIPTION

[0034] The following embodiments, combined with the accompanying drawings, further illustrate the specific implementation of the change-over switch of the present application. The change-over switch of the present application is not limited to the description of the following embodiments.

[0035] The change-over switch comprises a housing 1, at least one switch pole 2 is arranged in the housing 1, when two or more switch poles 2 are arranged in the housing 1, two adjacent switch poles 2 are arranged side by side, each switch pole 2 comprises at least three terminals 20, two sets of contact mechanisms and a rotating shaft 21, the three terminals 20 are divided into at least two incoming terminals and at least one outgoing terminal, the incoming terminals and the outgoing terminal are arranged at opposite ends of the housing 1, each terminal 20 is arranged in the terminal hole of the housing 1 and is used to connect with the external power supply, each set of contact mechanisms is connected between an incoming terminal and an outgoing terminal, that is, one set of contact mechanisms in the switch pole 2 is connected with the commonly used power supply through the terminal 20 connected therewith, and the other set of contact mechanisms is connected with the standby power supply through the terminal 20 connected therewith.

[0036] Specifically, the two sets of contact mechanisms in each switch pole 2 are arranged opposite to each other in the housing 1, each set of contact mechanisms is connected between an incoming terminal and an outgoing terminal, the rotating shaft 21 is arranged between the two sets of contact mechanisms, the rotating shaft 21 is driven to rotate, the two sets of contact mechanisms in the same switch pole 2 are driven to open and close by the rotating shaft 21, when the rotating shaft 21 drives one set of contact mechanisms to close, the other set of contact mechanisms is driven to open, the opening and closing of one set of contact mechanisms is used to control the disconnection and connection of the commonly used power supply, the opening and closing of the other set of contact mechanisms is used to control the disconnection and connection of the standby power supply, and the commonly used power supply and the standby power supply are not connected at the same time, that is, the two sets of contact mechanisms cannot be closed at the same time.

[0037] Each group of contact mechanism comprises a pair of spaced-apart moving contact assembly 22 and a stationary contact group, the moving contact assembly 22 comprises a contact support 221 and a moving contact 222 arranged on the contact support 221, the moving contact 222 is provided with a moving contact point 2221 at each end, the stationary contact group comprises two spaced-apart stationary contacts, each stationary contact is provided with a stationary contact point 232, the contact support 221 is driven by the rotating shaft 21 to drive the moving contact assembly 22 to move linearly, so that the moving contact point 2221 and the stationary contact point 232 in the same group of contact mechanism are in contact or separated, thereby connecting or disconnecting a group of contact mechanism.

[0038] For the convenience of description, the moving direction of the moving contact assembly 22 is the first direction, that is Figure 1 the up-down direction in the figure is the first direction, the two groups of contact mechanisms are spaced apart in the first direction, the two directions perpendicular to the first direction are the second direction and the third direction, the incoming terminal and the outgoing terminal are spaced apart in the second direction, that is Figure 1 the left-right direction in the figure is the second direction, the third direction is perpendicular to the first direction and the second direction, Figure 1 the third direction is the direction perpendicular to the paper, and the adjacent two switch poles 2 are stacked in the third direction.

[0039] As shown in Figure 2 , the improvement of the present application is that the moving contact 222 comprises at least two moving contact bridges 2220, the adjacent two moving contact bridges 2220 are arranged side by side in the third direction, each moving contact bridge 2220 is arranged on the contact support 221 in the second direction, and the moving contact point 2221 of each moving contact bridge 2220 and the stationary contact point 232 of the stationary contact are spaced apart in the first direction. That is, the length direction of the moving contact bridge 2220 is arranged in the second direction, and the width direction is arranged in the third direction.

[0040] In this way, the adjacent two moving contact bridges 2220 in the same moving contact assembly 22 are arranged side by side in the third direction, which can increase the number of contact points of the moving contact assembly 22, and avoid arranging the moving contact bridges 2220 in the moving direction of the moving contact assembly 22, thereby saving the space occupied by the moving contact assembly 22 in the shell 1, and facilitating the reduction of the size of the switch.

[0041] Specifically, the contact support 221 is provided with a mounting cavity 2210, each moving contact bridge 2220 is arranged in the mounting cavity 2210, so that the moving contact point 2221 of each moving contact bridge 2220 is located outside the mounting cavity 2210, and preferably, a clamping part 2222 is arranged at the edge of the moving contact bridge 2220, when the moving contact bridge 2220 is arranged in the mounting cavity 2210, the clamping part 2222 can be clamped and limited with the contact support 221, thereby ensuring the assembly stability of the moving contact bridge 2220 and the contact support 221.

[0042] Preferably, the contact support 221 is provided with at least one partition plate 2213, the partition plate 2213 is used to separate two adjacent movable contact bridges 2220 in the third direction, to ensure that each movable contact bridge 2220 is in contact with the static contact, to ensure the safety of use, further, the partition plate 2213 can separate the mounting cavity 2210 on the contact support 221 into at least two contact cavities arranged side by side in the third direction, one movable contact bridge 2220 is assembled in each contact cavity, and a contact spring 223 is further connected between each movable contact bridge 2220 and the mounting cavity 2210, the contact spring 223 is connected to the side of the movable contact bridge 2220 away from the static contact, when the movable contact bridge 2220 and the contact support 221 are relatively displaced in the first direction, the contact spring 223 is pressed to be deformed, and when the switch is closed, each contact spring 223 provides contact pressure to the corresponding movable contact bridge 2220.

[0043] A rotating shaft 21 is rotatably arranged between the two groups of contact mechanisms, and the movable contact assemblies 22 in the two groups of contact mechanisms are driven by the rotating shaft 21 to move in the first direction, wherein the number of rotating shafts 21 can be two, that is, two rotating shafts 21 are connected in linkage, and each rotating shaft 21 drives a movable contact assembly 22 to move in the first direction, preferably, the two groups of contact mechanisms are driven by the same rotating shaft 21, which can reduce the number of rotating shafts 21, save internal space, and reduce cost. Preferably, the rotating shaft 21 adopts a split structure, the rotating shaft 21 is rotated, one group of contact mechanisms is first opened to position by the rotating shaft 21, and the other group of contact mechanisms is then closed to position, thereby avoiding the two groups of contact mechanisms being closed at the same time, and ensuring the safety of use.

[0044] In combination Figures 1-4 A specific embodiment of a change-over switch is provided.

[0045] As Figure 1 shown, the change-over switch comprises a housing 1, at least one switch pole 2 is arranged in the housing 1, a terminal 20 is arranged in each switch pole 2, the terminal 20 is divided into an incoming terminal and an outgoing terminal, the incoming terminal and the outgoing terminal are spaced apart and opposite in the second direction, usually, the incoming terminal and the outgoing terminal are arranged in pairs; each switch pole 2 comprises two groups of contact mechanisms arranged in the first direction, a rotating shaft 21 is rotatably arranged between the two groups of contact mechanisms, each group of contact mechanisms comprises a movable contact assembly 22 and a static contact group spaced apart in the first direction, the movable contact assembly 22 is connected in linkage with the rotating shaft 21 through a linkage 24, and the movable contact assembly 22 is driven by the rotating shaft 21 to move in the first direction for cooperation with the static contact group, in this embodiment, the two groups of movable contact assemblies 22 are simultaneously driven by the rotating shaft 21 to move in the first direction, but the two groups of contact mechanisms cannot be simultaneously connected, that is, one group of movable contact assemblies 22 is in contact with one group of static contact groups, and the other group of movable contact assemblies 22 is separated from the other group of static contact groups.

[0046] Specifically, the moving contact assembly 22 comprises a contact support 221, the contact support 221 is connected with the rotating shaft 21 through the linkage 24, the hinge points of the two linkages 24 and the rotating shaft 21 and the axis of the rotating shaft 21 are not collinear, the middle part of the contact support 221 is provided with a mounting cavity 2210, one moving contact 222 is provided through the mounting cavity 2210, the two ends of the moving contact 222 are respectively provided with moving contact parts and extend out of the mounting cavity 2210, the stationary contact group comprises two stationary contacts which are arranged in the second direction, each stationary contact is provided with a stationary contact part which is spaced from the moving contact part, when the rotating shaft 21 drives the two moving contact assemblies 22 to move, in the same contact mechanism, the two moving contact parts of the moving contact 222 are respectively in contact with or separated from the stationary contact parts of the two stationary contacts.

[0047] In the embodiment, each moving contact 222 comprises at least two moving contact bridges 2220, the two adjacent moving contact bridges 2220 are arranged side by side in the third direction, each moving contact bridge 2220 is provided through the mounting cavity 2210 in the second direction, the two ends of each moving contact bridge 2220 are respectively provided with one moving contact point 2221, the same end of all the moving contact bridges 2220 on the same contact support 221 forms the moving contact part of the moving contact 222, at this time, each moving contact part has at least two moving contact points 2221, correspondingly, the stationary contact part of the stationary contact is provided with a stationary contact point 232 which cooperates with the moving contact point 2221, the number of the stationary contact point 232 can be one or correspond to the number of the moving contact point 2221, the moving contact point 2221 and the stationary contact point 232 are spaced from each other in the first direction, in this structure, the number of the contact points between the moving contact assembly 22 and the stationary contact group is increased, the two adjacent moving contact bridges 2220 are not arranged in the moving direction of the moving contact assembly 22, and the space occupied by the moving contact assembly 22 in the shell 1 is saved.

[0048] In the embodiment, as shown in Figures 2-4 the mounting cavity 2210 of each contact support 221 is provided with two moving contact bridges 2220 arranged side by side, the mounting cavity 2210 is divided into two contact cavities arranged side by side in the third direction by the partition plate 2213, one moving contact bridge 2220 is arranged in each contact cavity, the moving contact bridge 2220 is provided through each contact cavity, so that the two moving contact points 2221 of each moving contact bridge 2220 extend out of the contact cavity, the two adjacent moving contact bridges 2220 are separated by the partition plate 2213, so that the safety in use is ensured. Preferably, the limiting structure which is clamped with each other is arranged between the contact support 221 and the moving contact bridge 2220, Figure 4In this design, a snap-fit ​​portion 2222 is provided on the edge of the movable contact bridge 2220, so that the movable contact bridge 2220 is snapped and limited by the snap-fit ​​portion 2222, thereby restricting the relative movement of the movable contact bridge 2220 and the contact support 221 in the second direction, and ensuring the assembly stability of the movable contact bridge 2220 and the contact support 221.

[0049] Furthermore, each contact cavity is equipped with a contact spring 223. Each contact spring 223 is located on the side of the moving contact bridge 2220 facing away from the stationary contact, ensuring the contact pressure between each moving contact bridge 2220 and the stationary contact. In the figure, each contact spring 223 is a spring segment.

[0050] Combination Figures 1-4 A moving contact assembly 22 is provided for use in this embodiment.

[0051] like Figure 2 , 3 As shown, the contact support 221 includes a block-shaped support body. A through groove serving as a mounting cavity 2210 is provided in the middle of the support body. A partition 2213 is provided inside the mounting cavity 2210, which divides the mounting cavity 2210 into two relatively independent contact cavities. One end of the support body is provided with a hinge portion 2211. A drive hole for hinged connection with the linkage member 24 is provided in the middle of the hinge portion 2211. The other end of the support body is provided with a pair of spaced baffles 2215. The support body between the pair of baffles 2215 is provided with a protruding insertion portion 2214. A reset elastic member 25 can be connected to the insertion portion 2214. The linkage member 24 and the reset elastic member 25 connected to the same contact support 221 form a set of drive components connected to the moving contact assembly 22.

[0052] like Figure 2 , 4 As shown, each movable contact bridge 2220 includes a strip-shaped contact bridge body. A movable contact 2221 is provided at each end of the contact bridge body, and the movable contact 2221 is located on the same side plate surface of the contact bridge body. Each contact spring 223 is connected to the middle of the contact bridge body. Each movable contact bridge 2220 has a snap-fit ​​portion 2222 protruding outward from its edge. Preferably, the snap-fit ​​portions 2222 are arranged in pairs on the same side of the movable contact bridge 2220. That is, the two snap-fit ​​portions 2222 on the same side are spaced apart in the second direction, and there is a gap between the two snap-fit ​​portions 2222 in the second direction, so that each snap-fit ​​portion 2222 is used to snap-fit ​​with the edge of the contact support 221.

[0053] In this embodiment, the stationary contact can employ existing technology. Typically, the stationary contact includes a stationary contact plate 231. Preferably, the stationary contact plate 231 is disposed along the corner of the housing 1, thereby reducing the space occupied by the stationary contact plate 231. Figure 1In this embodiment, one end of the stationary contact plate 231 is arranged along the second direction, and two stationary contacts 232 are arranged side by side in the third direction. Each stationary contact 232 is spaced apart from a moving contact 2221 in the first direction. The middle part of the stationary contact plate 231 can be bent and extended so that the other end of the stationary contact plate 231 moves closer to the adjacent terminal 20. In this embodiment, the two sets of contact mechanisms share a single output terminal. That is, one stationary contact in each of the two sets of contact mechanisms is connected to two different input terminals, and the other stationary contact in each of the two sets of contact mechanisms is connected to the same output terminal.

[0054] In this embodiment, the rotating shaft 21 is rotatably disposed between two sets of contact mechanisms. The axis of rotation of the rotating shaft 21 is parallel to a third direction. The rotating shaft 21 is connected to the hinge portion 2211 of a contact support 221 via a linkage 24. The rotating shaft 21 can be a one-piece structure. Of course, in this embodiment, it is preferred that the rotating shaft 21 adopts a split structure, such as... Figure 6 As shown, the rotating shaft 21 includes a drive shaft 211 that can be driven to rotate. Two rotating disks 212 are coaxially mounted on the drive shaft 211. Each rotating disk 212 is driven to rotate by the drive shaft 211, and the two rotating disks 212 can also be driven to drive each other. Each rotating disk 212 is connected to a moving contact assembly 22 through a linkage 24.

[0055] Furthermore, each contact support 221 is also connected to a reset elastic element 25. Figure 1 , 2 In the middle, the reset elastic element 25 is elastically connected between the plug portion 2214 of the contact support 221 and the outer shell 1. The reset elastic element 25 and the linkage element 24 connected on the same contact support 221 together form a set of driving components. The rotating shaft 21 realizes that one set of contact mechanisms opens first and the other set of contact mechanisms closes later through the two sets of driving components.

[0056] Combination Figures 5-9 A split-type rotating shaft 21 structure is provided for application in this embodiment.

[0057] like Figure 5 , 7As shown in FIG. 9, the rotating shaft 21 comprises a driving shaft 211, two rotating discs 212 are coaxially arranged on the driving shaft 211, each rotating disc 212 is driven by the driving shaft 211, and each rotating disc 212 is connected with the contact support 221 of the movable contact assembly 22 through a linkage 24. When the rotating shaft 21 rotates, the rotation of the driving shaft 211 drives one rotating disc 212 to rotate in the opening direction and the other rotating disc 212 to rotate in the closing direction. Two opening pushing parts 2112 are arranged on the middle part of the driving shaft 211, each opening pushing part 2112 cooperates with two linkages 24. When the driving shaft 211 rotates, the opening pushing part 2112 first pushes one linkage 24 to drive one rotating disc 212 to rotate in the opening direction, and then the driving shaft 211 drives the other rotating disc 212 to rotate in the closing direction, so as to realize that one set of contact mechanism opens first and the other set of contact mechanism closes later.

[0058] As shown in FIGS. 1-8, Figure 5 、 7 and 8, the opening pushing part 2112 is protrudedly arranged on the middle side wall of the driving shaft 211, each rotating disc 212 is arranged on the two ends of the driving shaft 211, and one end of the linkage 24 connected with each rotating disc 212 is located on the rotation track of the opening pushing part 2112. Specifically, one end of the linkage 24 passes through the connecting hole 2124 of one rotating disc 212, and the one end of the linkage 24 can slide in the connecting hole 2124 of the rotating disc 212. The other end of the linkage 24 is connected with the movable contact assembly 22. The rotating shaft 21, the movable contact assembly 22 and the linkage 24 have simple structure, strong cooperation stability and low cost.

[0059] The driving shaft 211 is provided with a driving part 2111, the two opening pushing parts 2112 are symmetrically distributed on the two sides of the driving part 2111 along the circumferential direction of the driving shaft 211, and the rotating disc 212 is provided with a driving groove 2121. The driving part 2111 cooperates with the driving groove 2121 to drive the rotating disc 212 to rotate in the closing direction or the opening direction, which has the advantages of simple structure and reliable cooperation.

[0060] Preferably, the middle side wall of the driving shaft 211 is outwardly protruded to form a separation part 2110, the two ends of the driving shaft 211 are drivingly connected with the two rotating discs 212, one end of the linkage 24 connected with each rotating disc 212 is located on the rotation track of the opening pushing part 2112, and the two rotating discs 212 are separated by the separation part 2110, which can avoid mutual interference of the two rotating discs 212 in the rotating process.

[0061] Specifically, as shown in FIGS. 1-8, Figures 7-9As shown, the drive shaft 211 is cylindrical in shape. A strip-shaped boss protrudes from the circumferential sidewall of the drive shaft 211. A disc-shaped partition 2110 protrudes radially from the middle of the drive shaft 211. The partition 2110 makes the drive shaft 211 a stepped shaft that is thicker in the middle and thinner at both ends. The partition 2110 divides the strip-shaped boss into two drive sections 2111. Figures 7-9 In this configuration, the protrusion height of the strip-shaped boss is less than the protrusion height of the partition 2110; that is, the protrusion height of each drive part 2111 is less than the protrusion height of the partition 2110. Two bosses, serving as tripping push parts 2112, protrude outwards from the two sides of the partition 2110, and the two tripping push parts 2112 are symmetrically distributed on both sides of the strip-shaped boss along the circumferential direction of the partition 2110. Figures 7-9 In the circuit, each tripping push unit 2112 includes a straight sidewall and an arc-shaped wall. The straight sidewall of each tripping push unit 2112 faces one end of the linkage member 24 and drives the linkage member 24 by the straight sidewall of the tripping push unit 2112. The arc-shaped wall of each tripping push unit 2112 faces the drive unit 2111.

[0062] like Figure 6 , 7 As shown in Figure 9, each rotating disk 212 is generally circular. A central hole 2120 penetrating both sides is formed in the middle of the end face of the rotating disk 212. The two ends of the drive shaft 211 pass through the central holes 2120 of the two rotating disks 212 respectively. Of course, the central holes 2120 of the rotating disk 212 may not penetrate the rotating disk 212, in which case one end of the drive shaft 211 is inserted into the central hole 2120. An arc groove is also formed on the end face of the rotating disk 212. This arc groove serves as the drive groove 2121. In this embodiment, the drive groove 2121 is located on one side of the hole wall of the central hole 2120, so that the side with the smaller diameter of the drive groove 2121 is connected to the central hole 2120, so that the drive groove 2121 and the central hole 2120 are connected. 0 and the rotating disk 212 are concentric. The opposite ends of the drive groove 2121 serve as the closing part 2122 and the stop part 2125, respectively. One drive part 2111 on the drive shaft 211 is located in the drive groove 2121. The drive part 2111 cooperates with the closing part 2122 to drive the rotating disk 212 to perform closing rotation. In addition, the central angle of the drive part 2111 is smaller than the central angle of the drive groove 2121. That is, when the drive part 2111 abuts with the closing part 2122, there is a gap between the drive part 2111 and the stop part 2125 to ensure that when the drive part 2111 cooperates with one closing part 2122 to rotate, there is sufficient free travel between the drive part 2111 and the other stop part 2125.

[0063] The circumferential sidewall of the rotating disk 212 protrudes outward to form a connecting part 2123. The connecting part 2123 is located on the side away from the drive groove 2121 and is located closer to the stop part 2125. The connecting part 2123 has a strip-shaped connecting hole 2124. The through direction of the strip-shaped hole is parallel to the through direction of the central hole 2120. One end of the linkage 24 passes through the connecting hole 2124 and can slide in the connecting hole 2124. When the two rotating disks 212 are assembled on the drive shaft 211, the two connecting parts 2123 correspond to the two opening push parts 2112. In this embodiment, the two connecting parts 2123 are located between the straight sidewalls of the two opening push parts 2112.

[0064] The linkage 24 that mates with the rotating shaft 21 is preferably a U-shaped rod, with one end of the linkage 24 slidably inserted into the connecting hole 2124, such as... Figure 6 As shown, one end of the linkage 24 located in the connection hole 2124 extends to the moving trajectory of the tripping push part 2112, and the other end is connected to the moving contact assembly 22. That is, the other end of the linkage 24 passes through the drive hole of the contact support 221.

[0065] Combination Figure 5 Briefly describe the process of the rotating shaft 21 cooperating with the two sets of contact mechanisms.

[0066] exist Figure 5 In the first contact mechanism, the upper contact mechanism is the first contact mechanism, and the lower contact mechanism is the second contact mechanism. The moving contact assembly 22 in the first contact mechanism is connected to the first linkage member, and the moving contact assembly 22 in the second contact mechanism is connected to the second linkage member. The two rotating disks 212 of the rotating shaft 21 are divided into the first rotating disk and the second rotating disk according to the first linkage member and the second linkage member connected to them. The tripping push part 2112 that cooperates with the first linkage member is the first tripping push part, and the tripping push part 2112 that cooperates with the second linkage member is the second tripping push part.

[0067] like Figure 5When the driving shaft 211 rotates to switch the state of the two sets of contact mechanisms, a gap is left between the driving part 2111 and the second rotating disc stopper 2125. When the driving shaft 211 rotates, the straight side wall of the second opening pusher pushes one end of the second linkage, and thus the second rotating disc rotates to the opening direction under the cooperation of the second opening pusher and the driving part 2111, thereby driving the movable contact assembly 22 in the second contact mechanism to move to the opening direction. At the same time, when the driving part 2111 cooperates with the stopper 2125 of the second rotating disc, the driving part 2111 has moved a distance in the driving groove 2121 of the first rotating disc and cooperates with the closing part 2122 of the first rotating disc, thereby pushing the first rotating disc to rotate to the closing direction. The first rotating disc rotating to the closing direction drives the movable contact assembly 22 in the first contact mechanism to move to the closing direction, thereby realizing that the second contact mechanism opens first and the first contact mechanism closes later.

[0068] When the driving shaft 211 rotates to switch the state of the two sets of contact mechanisms again, a gap is left between the driving part 2111 and the first rotating disc stopper 2125. When the driving shaft 211 rotates, the straight side wall of the first opening pusher pushes one end of the first linkage, and thus the first rotating disc rotates to the opening direction under the cooperation of the first opening pusher and the driving part 2111, thereby driving the movable contact assembly 22 in the first contact mechanism to move to the opening direction. At the same time, when the driving part 2111 cooperates with the stopper 2125 of the first rotating disc, the driving part 2111 has moved a distance in the driving groove 2121 of the second rotating disc and cooperates with the closing part 2122 of the second rotating disc, thereby driving the second rotating disc to rotate to the closing direction. The second rotating disc rotating to the closing direction drives the movable contact assembly 22 in the second contact mechanism to move to the closing direction, thereby realizing that the first contact mechanism opens first and the second contact mechanism closes later.

[0069] Preferably, a limiting part 11 is further arranged in the shell 1, Figure 1 The limiting part 11 is an arc-shaped boss, and the limiting part 11 is arranged around the side of the rotating shaft 21 opposite to the connecting part 2123. When the rotating shaft 21 rotates, each connecting part 2123 can be stopped by the limiting part 11, thereby limiting the rotation of the rotating disc 212 to the opening position.

[0070] In addition, the switch pole 2 is further provided with an arc extinguishing system matched with each contact mechanism, preferably, the arc extinguishing system comprises an arc extinguishing chamber 28, in the first direction, each arc extinguishing chamber 28 is arranged side by side with the corresponding contact mechanism, and the two arc extinguishing chambers 28 are located on the same side of the two contact mechanisms, the moving contact part of each moving contact 222 is in contact with or separated from the fixed contact at the arc inlet of an arc extinguishing chamber 28, so as to facilitate the introduction of the arc into the arc extinguishing chamber 28, in the second direction, the arc extinguishing chambers 28 in the two arc extinguishing systems are arranged at intervals, by reducing the number of arc extinguishing chambers used, the internal space is saved, and the cost is reduced.

[0071] In the embodiment, the control pole can also be arranged in the shell 1, the control pole is arranged side by side with the switch pole 2 in the third direction, the control pole adopts the prior art, that is, the control pole comprises a circuit board, a motor and a gear set, the circuit board is provided with a controller, the motor is connected to the circuit board and starts and stops according to the control signal output by the controller, and the gear set is drivingly connected between the output shaft of the motor and the rotating shaft 21, so as to realize automatic opening and closing of the switch pole 2 driven by the control pole.

[0072] It should be noted that, in the description of the utility model, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings or the orientation or positional relationship commonly used in use, and are only for the convenience of description, and do not indicate that the device or element referred to must have a particular orientation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" and the like are only used for distinguishing description, and cannot be understood as indicating relative importance.

[0073] The above is a further detailed description of the utility model in combination with specific preferred embodiments, and the specific implementation of the utility model cannot be limited to these descriptions. For ordinary skilled persons in the technical field to which the utility model belongs, without departing from the concept of the utility model, a number of simple deductions or substitutions can be made, which should be regarded as falling within the protection scope of the utility model.

Claims

1. A changeover switch, comprising a housing (1) and a switch electrode (2) disposed within the housing (1), the switch electrode (2) comprising a rotating shaft (21) and two sets of contact mechanisms, wherein the rotating shaft (21) is rotatably mounted between the two sets of contact mechanisms in a first direction, each set of contact mechanisms comprising a stationary contact group and a moving contact assembly (22) spaced apart and opposite to each other in the first direction, the stationary contact group comprising two stationary contacts spaced apart in a second direction, the moving contact assembly (22) comprising a contact support (221) and a moving contact (222), the contact support (221) being driven by the rotating shaft (21) to move linearly along the first direction, characterized in that: The movable contact (222) comprises at least two movable contact bridges (2220), two adjacent movable contact bridges (2220) are arranged side by side in the third direction, each movable contact bridge (2220) is arranged on the contact support (221) in the second direction, and the movable contact point (2221) of each movable contact bridge (2220) is spaced from the fixed contact point (232) of the fixed contact in the first direction, the first direction, the second direction and the third direction are perpendicular to each other.

2. The switch according to claim 1, characterized in that: The contact support (221) is provided with at least one partition plate (2213), and the partition plate (2213) separates two adjacent movable contact bridges (2220) in the third direction.

3. The switch according to claim 1 or 2, characterized in that: The contact support (221) is provided with a mounting cavity (2210), and the movable contact bridge (2220) is arranged in the mounting cavity (2210) in a penetrating manner, so that the movable contact point (2221) of each movable contact bridge (2220) is located outside the mounting cavity (2210).

4. The switch according to claim 3, characterized in that: The edge of the movable contact bridge (2220) is provided with a clamping part (2222), and the clamping part (2222) is clamped and limited with the contact support (221).

5. The switch according to claim 3, characterized in that: The mounting cavity (2210) is provided with a partition plate (2213), and the partition plate (2213) separates the mounting cavity (2210) into at least two contact cavities in the third direction, one movable contact bridge (2220) and one contact spring (223) are arranged in each contact cavity, and the contact spring (223) is located on the side of the movable contact bridge (2220) away from the fixed contact.

6. The switch according to claim 1, characterized in that: Each contact support (221) is connected with the same rotating shaft (21) through one linkage (24), and the connection positions of the two linkages (24) on the rotating shaft (21) are not collinear with the axis of the rotating shaft (21).

7. The switch according to claim 6, characterized in that: The rotating shaft (21) comprises a driving shaft (211), two coaxial rotating discs (212) are assembled on the driving shaft (211), and the two rotating discs (212) are driven in cooperation with the driving shaft (211), respectively. Each rotating disc (212) is connected with the contact support (221) through one linkage (24).

8. The switch according to claim 7, characterized in that: A reset elastic member (25) is further connected between each contact support (221) and the shell (1), and the reset elastic member (25) is located on the side of the contact support (221) away from the rotating shaft (21).

9. The switch according to claim 7 or 8, characterized in that: The driving shaft (211) is provided with two split-gate pushing parts (2112), each split-gate pushing part (2112) is matched with one linkage (24), and when the driving shaft (211) is rotated, one linkage (24) is first driven by one split-gate pushing part (2112) to drive the connected rotating disc (212) to split-gate rotate, and then another rotating disc (212) is driven by the driving shaft (211) to split-gate rotate.

10. The switch according to claim 9, characterized in that: The middle part of the driving shaft (211) is outwardly protruded to form a split-gate pushing part (2112), and the two ends of the driving shaft (211) are drivingly connected with the two rotating discs (212), and one end of the linkage (24) connected with each rotating disc (212) is located on the rotation track of the split-gate pushing part (2112).

11. The switch according to claim 10, characterized in that: The driving shaft (211) is provided with a driving part (2111), and two split-brake pushing parts (2112) are symmetrically distributed on both sides of the driving part (2111) along the circumferential direction of the driving shaft (211); the rotating disc (212) is provided with a driving groove (2121) matched with the driving part (2111).

12. The switch according to claim 1, characterized in that: Each static contact includes at least one static contact plate (231), one end of the static contact plate (231) is provided along the second direction and is provided with a static contact point (232), and the static contact point (232) is spaced apart from the moving contact point (2221) at one end of each moving contact bridge (2220) in the first direction.

13. The switch according to claim 1, characterized in that: Each contact mechanism is also matched with an arc extinguishing system, the arc extinguishing system includes an arc extinguishing chamber (28), in the first direction, the arc extinguishing chamber (28) is arranged side by side with the matched contact mechanism, and the two arc extinguishing chambers (28) are located on the same side of the two groups of contact mechanisms, and in the second direction, the arc extinguishing chambers (28) of the two arc extinguishing systems are spaced apart.

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