Switching device

Abstract

The switch device comprises a shell, an electromagnetic operating system and at least one contact unit are arranged in the shell, each contact unit comprises a contact mechanism, the contact mechanism comprises a moving contact assembly and a static contact group which are arranged at intervals in the first direction, and the static contact group comprises two static contacts which are arranged at intervals in the second direction. One moving contact part of the moving contact assembly is opposite to the static contact part of one static contact in a spaced mode in the first direction, the electromagnetic operating system comprises two electromagnetic driving mechanisms and a linkage assembly, and the two electromagnetic driving mechanisms are arranged in a spaced mode in the second direction. The linkage assembly is in linkage connection between the two electromagnetic driving mechanisms and is in linkage with the moving contact assembly of at least one contact unit, and the linkage assembly and the moving contact assembly are arranged in the first direction and drive the moving contact assembly to move in the first direction. The two electromagnetic driving mechanisms jointly drive the contact mechanism, and stable driving force is provided for opening and closing of the contact mechanism.

Description

Technical Field

[0001] The present invention relates to the field of low-voltage electrical appliances, and particularly to a switching device. Background Art

[0002] A switching device is a device for controlling the on-off of a circuit. The switching device includes an electromagnetic operating system and at least one contact unit. The contact mechanism of the contact unit is driven by the electromagnetic operating system to open and close. However, in existing products, the electromagnetic operating system usually only includes one electromagnetic driving mechanism that can output driving force. This structure has the following defects: First, the driving force output by the electromagnetic driving mechanism is limited. In particular, when the electromagnetic driving mechanism needs to drive multiple contact mechanisms to open and close, it is impossible to ensure the opening and closing speed of the contact mechanism. Second, there is a linkage component connected between the electromagnetic driving mechanism and the moving contact assembly. The moving trajectories of the electromagnetic driving mechanism, the linkage component, and the moving contact assembly are collinear, which makes the switching device occupy more space in height and is not conducive to meeting the miniaturization design. Summary of the Invention

[0003] The purpose of the present invention is to overcome at least one defect of the prior art and provide a switching device with a simple structure and high reliability.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions:

[0005] The present invention provides a switching device, including a housing. An electromagnetic operating system and at least one contact unit are arranged in the housing. Each contact unit includes a contact mechanism. The contact mechanism includes a moving contact assembly and a static contact group that are spaced apart in a first direction. The static contact group includes two static contacts that are spaced apart in a second direction. A moving contact part of the moving contact assembly is spaced opposite to a static contact part of a static contact in the first direction. The first direction is perpendicular to the second direction.

[0006] The electromagnetic operating system includes two electromagnetic driving mechanisms and a linkage component. The two electromagnetic driving mechanisms are spaced apart in the second direction. The linkage component is linked between the two electromagnetic driving mechanisms and is linked with the moving contact assembly of at least one contact unit. The linkage component and the moving contact assembly are arranged along the first direction and drive the moving contact assembly to move along the first direction.

[0007] Preferably, the electromagnetic operating system further includes an elastic resetting member. The elastic resetting member is arranged between the two electromagnetic driving mechanisms. The elastic resetting member cooperates with the linkage component to reset the electromagnetic operating system.

[0008] Preferably, the linkage component at least includes a linkage rod. The two ends of the linkage rod are respectively connected to the two electromagnetic driving mechanisms. The moving contact assembly is driven by the middle part of the linkage rod.

[0009] Preferably, the linkage assembly further includes a linkage member. The linkage member is provided with at least one first linkage hole. The linkage rod passes through the first linkage hole along the second direction. The linkage member is provided with at least one second linkage hole, and the second linkage hole is used for linkage connection with the moving contact assembly.

[0010] Preferably, the linkage member is provided with at least one avoidance groove for avoiding the moving contact assembly. The linkage member is further provided with at least one third limiting groove, and the third limiting groove cooperates with an elastic reset member for resetting the electromagnetic operating system.

[0011] Preferably, the electromagnetic driving mechanism includes a coil assembly and a moving assembly. The coil assembly includes a coil bobbin and a coil wound around the outer side of the coil bobbin. The moving assembly includes a stationary iron core and a moving iron core. The stationary iron core is fixed at one end of the coil bobbin, and the moving iron core is slidably arranged in the middle of the coil bobbin along the first direction and is spaced opposite to the stationary iron core. The two moving iron cores are linked together.

[0012] Preferably, the contact unit further includes a unit housing. The contact mechanism is arranged in the unit housing, and the electromagnetic operating system is arranged outside the unit housing along the first direction.

[0013] Preferably, a linkage groove is formed in the middle of one side of the unit housing. In the second direction, first limiting grooves are respectively formed on both sides of the linkage groove. Each first limiting groove is recessed into the unit housing to form a position for limiting and assembling an electromagnetic driving mechanism.

[0014] Preferably, each contact unit further includes a current detection device and a connection circuit board. The current detection device is connected to the contact mechanism, and the wiring terminal of the current detection device extends outside the unit housing and is connected to the connection circuit board. The connection circuit board is arranged in a fitting manner on the outer surface of the unit housing.

[0015] Preferably, an installation groove for installing the connection circuit board is formed on the outer surface of the unit housing. One end of the installation groove is communicated with the wiring terminal, and the other end extends to one side of the adjacent electromagnetic driving mechanism and is communicated with the first limiting groove for limiting the electromagnetic driving mechanism.

[0016] In the switch device of the present invention, the electromagnetic operating system includes two electromagnetic driving mechanisms, and the two electromagnetic driving mechanisms jointly drive the contact mechanism, providing a stable driving force for the opening and closing of the contact mechanism and improving the stability of the electromagnetic operating system for driving multiple contact mechanisms.

[0017] In addition, the elastic reset member is arranged side by side with the electromagnetic driving mechanism, and can reset the electromagnetic driving mechanism and the linkage assembly at the same time, making full use of the space inside the housing.

[0018] In addition, the first limiting groove of the unit housing can limit and assemble the electromagnetic driving mechanism. The inward depression of the first limiting groove in the unit housing can make full use of the space inside the housing, which is beneficial to reducing the height of the switching device in the first direction.

[0019] In addition, the connection circuit board connected to the current detection device is attached to the outer surface of the unit housing, avoiding the interference of the connection circuit board to the inside of the contact unit. In particular, an installation groove is provided on the outer surface of the unit housing, and the connection circuit board is arranged in the installation groove without increasing the overall thickness of the switching device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the switching device of the present invention after removing the housing;

[0021] Figure 2 is a schematic diagram of the electromagnetic driving mechanism and the linkage assembly in the present invention;

[0022] Figure 3 is a schematic structural diagram of the electromagnetic operating system and the contact unit in the present invention;

[0023] Figure 4 is a schematic structural diagram of the disassembled electromagnetic operating system and the contact unit in the present invention;

[0024] Figure 5 is a schematic internal structure diagram of the contact unit in the present invention;

[0025] Figure 6 is a front view of the internal structure of the contact unit in the present invention;

[0026] Figure 7 is a schematic structural diagram of the contact head mechanism in the present invention;

[0027] Figure 8 is a schematic structural diagram of the moving contact assembly in the present invention;

[0028] Reference Numerals:

[0029] 1b - Base, t - Terminal, 2 - Contact Unit, 2h - Unit Housing, 20h - Linkage Groove, 21h - Arc Extinguishing Channel, 22h - First Limiting Groove, 23h - Limiting Platform, 2p - Mounting Groove, 2g - Yoke Mounting Groove, 2e - Unit Exhaust Port, 2l - Second Limiting Groove, 20 - Contact Mechanism, 21 - Moving Contact Assembly, 200 - Contact Support, 200b - Linkage Portion, 2010b - Connecting Hole, 200c - Bearing Portion, 2001c - Top Wall of Bearing Portion, 2002c - Bottom Wall of Bearing Portion, 2003c - Front Wall of Bearing Portion, 2004c - Rear Wall of Bearing Portion, 201 - Moving Contact Bridge, 2011 - Moving Contact Portion, 2012 - Moving Contact Point, 201 - Limiting Portion, 22 - Stationary Contact Group, 220 - Stationary Contact, 2200 - Stationary Contact Plate, 2201 - Stationary Contact Point, 23 - Magneto - enhancing Component, 24 - Arc Extinguishing Chamber, 25 - Metal Partition, 26 - Arc Separating Plate, 27 - Arc - guiding Plate, 28 - Current Detection Device, 3 - Electromagnetic Operating System, 3m - Electromagnetic Driving Mechanism, 31 - Moving Iron Core, 32 - Coil Assembly, 33 - Stationary Iron Core, 3c - Transmission Rod, 3b - Linkage Component, 30b - Body of Linkage Component, 300b - First Linkage Hole, 31b - Avoidance Groove, 32b - Linkage Bridge Arm, 320b - Second Linkage Hole, 33b - Third Limiting Groove, 3r - Linkage Rod, 7 - Elastic Reset Component. Detailed Embodiment

[0030] The following embodiments given in conjunction with the drawings further illustrate the detailed embodiments of the switch device of the present invention. The switch device of the present invention is not limited to the description of the following embodiments.

[0031] As Figure 1 shown, the switch device includes a housing, a control system, an electromagnetic operating system 3 and at least one contact unit 2 are arranged in the housing. The control system outputs a control signal to drive the electromagnetic operating system 3 to act. The electromagnetic operating system 3 includes an electromagnetic driving mechanism 3m and a linkage assembly. Each contact unit 2 includes at least a contact mechanism 20. The contact mechanism 20 includes a moving contact assembly 21 and a stationary contact group 22 that cooperate with each other. The stationary contact group 22 includes two stationary contacts 220 arranged at intervals. One moving contact portion 2011 of each moving contact assembly 21 is spaced opposite to the stationary contact portion of one stationary contact 220 respectively. Adjacent two moving contact assemblies 21 are linked and connected. The electromagnetic driving mechanism 3m is drivingly connected to at least one moving contact assembly 21 through the linkage assembly.

[0032] For the convenience of description, the moving direction of the electromagnetic driving mechanism 3m is taken as the first direction. Figure 1 In, the direction where the Y - axis is located is the first direction. The moving contact assembly 21 is spaced opposite to the stationary contact group 22 in the first direction. The two directions perpendicular to the first direction are the second direction and the third direction respectively. Figure 1Among them, the direction where the X-axis is located is the second direction, the direction where the Z-axis is located is the third direction. The two static contacts 220 are arranged at intervals in the second direction. The contact mechanism 20 is located between a pair of terminal blocks t. When multiple contact units 2 are arranged in the housing, two adjacent contact units 2 are arranged side by side in the third direction.

[0033] The improvement of this application lies in that the electromagnetic operating system 3 includes two electromagnetic driving mechanisms 3m and a linkage assembly. The two electromagnetic driving mechanisms 3m are arranged at intervals in the second direction. The linkage assembly is linked between the two electromagnetic driving mechanisms 3m and is linked with the moving contact assembly 21 of at least one contact unit 2. The linkage assembly and the moving contact assembly 21 are arranged along the first direction and drive the moving contact assembly 21 to move along the first direction.

[0034] In this way, the two electromagnetic driving mechanisms 3m jointly drive the contact mechanism 20, providing a stable driving force for the opening and closing of the contact mechanism 20, and improving the stability of the electromagnetic operating system 3 in driving multiple contact mechanisms 20.

[0035] Furthermore, as Figure 3 、 4 shown, the electromagnetic operating system 3 further includes an elastic resetting member 7. The elastic resetting member 7 is arranged between the two electromagnetic driving mechanisms 3m. The elastic resetting member 7 cooperates with the linkage assembly to reset the whole electromagnetic operating system 3. That is, the electromagnetic driving mechanisms 3m and the linkage assembly are reset by the elastic resetting member 7 at the same time. The elastic resetting member 7 is arranged side by side with the electromagnetic driving mechanisms 3m, making full use of the space in the housing.

[0036] Specifically, the linkage assembly at least includes a linkage rod 3r. The two ends of the linkage rod 3r are respectively connected to the two electromagnetic driving mechanisms 3m. The moving contact assembly 21 is driven by the middle part of the linkage rod 3r. Preferably, the linkage assembly further includes a linkage member 3b. The linkage member 3b is provided with at least one first linkage hole 300b and at least one second linkage hole 320b. The linkage rod 3r passes through the first linkage hole 300b along the second direction to be linked with the two electromagnetic driving mechanisms 3m. The second linkage hole 320b is used for being linked with the moving contact assembly 21, which is beneficial to ensuring the linkage and cooperation stability.

[0037] Combined with Figures 1-8 A specific structure of a switching device is provided.

[0038] As Figures 1-3As shown, the switching device includes a housing. The opposite ends of the housing serve as connection terminals respectively. Each connection terminal is provided with at least one wiring groove. Each wiring groove is correspondingly provided with an operation hole and a wiring hole for convenient operation and wiring. The connecting wire between the two connection terminals is parallel to the second direction. One side of the housing between the two connection terminals serves as an operation end. In the figure, the operation end protrudes from the middle of the housing, making the whole housing present a convex shape. Preferably, the housing includes an upper cover and a base 1b that cover each other. The upper cover covers the base 1b in the first direction, and the operation end corresponds to the middle position of the upper cover.

[0039] A control system (not shown), an electromagnetic operating system 3, and at least one contact unit 2 are arranged in the housing. The control system includes a control circuit board. The electromagnetic operating system 3 is connected to the control circuit board so that the electromagnetic operating system 3 moves in the first direction according to the control signal output by the controller. The electromagnetic operating system 3 and the contact unit 2 are arranged along the first direction. In this embodiment, the number of contact units 2 is multiple. Two adjacent contact units 2 are arranged side by side in the third direction. The electromagnetic operating system 3 is at least linked and connected with the contact mechanism 20 of one of the contact units 2. Correspondingly, the opening and closing directions of the contact mechanisms 20 of each contact unit 2 also follow the first direction.

[0040] As Figures 1-4 As shown, the electromagnetic operating system 3 includes an electromagnetic driving mechanism 3m and a linkage assembly. Each contact unit 2 includes a pair of connection terminals t arranged at intervals in the second direction. A contact mechanism 20 is connected between the pair of connection terminals t. The contact mechanism 20 includes a moving contact assembly 21 and a static contact group 22 spaced relatively in the first direction. The electromagnetic driving mechanism 3m is linked and connected with the moving contact assembly 21 of at least one contact unit 2 through the linkage assembly. The moving contact assemblies 21 of two adjacent contact units 2 are linked and connected. That is, a transmission rod 3c is connected between two adjacent moving contact assemblies 21. The electromagnetic operating system 3 can be drivingly connected with one of the moving contact assemblies 21 through the linkage assembly, and the remaining moving contact assemblies 21 act synchronously under the linkage action of the transmission rod 3c. Preferably, the linkage assembly is linked and connected with the transmission rod 3c, so that all the moving contact assemblies 21 are synchronously driven by the electromagnetic operating system 3, ensuring the action consistency.

[0041] Combined with Figures 1-4Provide a specific structure of an electromagnetic operating system 3. The electromagnetic operating system 3 includes an electromagnetic driving mechanism 3m and a linkage assembly. The linkage assembly and the moving contact assembly 21 are arranged along a first direction. The electromagnetic driving mechanism 3m moves along the first direction and is arranged side by side with the linkage assembly in a second direction. The electromagnetic driving mechanism 3m is connected to the moving contact assemblies 21 of at least one contact unit 2 through the linkage assembly. In this embodiment, the electromagnetic driving mechanism 3m synchronously drives all the moving contact assemblies 21 to move along the first direction through the linkage assembly. The electromagnetic driving mechanism 3m corresponds to the area between the contact mechanism 20 and a terminal t, so that the electromagnetic driving mechanism 3m moves linearly in the area above the arc extinguishing system. That is, in the first direction, the moving trajectory of the electromagnetic driving mechanism 3m and the moving trajectory of the linkage assembly are not on the same straight line, which is beneficial to reducing its height.

[0042] As Figure 3 , 4 shown, the electromagnetic operating system 3 further includes an elastic reset member 7. The elastic reset member 7 cooperates with the linkage assembly to reset the electromagnetic driving mechanism 3m and the linkage assembly. Preferably, in the second direction, the elastic reset member 7 is arranged between two electromagnetic driving mechanisms 3m. In the third direction, the elastic reset member 7 is arranged on the unit housing 2h between two contact units 2. Two adjacent contact units 2 share one elastic reset member 7, which is beneficial to reducing costs.

[0043] In this embodiment, as Figure 1 shown, the electromagnetic driving mechanism 3m includes a yoke, a coil assembly 32 and a moving assembly. The yoke is arranged around the outside of the coil assembly 32. The coil assembly 32 includes a coil skeleton and a coil wound around the outside of the coil skeleton. The moving assembly includes a moving iron core 31 and a static iron core 33. The static iron core 33 and the moving iron core 31 are respectively arranged at opposite ends of the coil skeleton. Each coil skeleton is arranged in the housing along the first direction. The moving iron core 31 is driven by the coil assembly 32 to move along the first direction according to a control signal. The two coil skeletons are arranged at intervals in the second direction. The two moving iron cores 31 are arranged at intervals in the second direction and are linked through the linkage assembly. Of course, the electromagnetic driving mechanism 3m can also adopt the prior art.

[0044] As Figures 1-4As shown, the linkage assembly includes a linkage rod 3r and a linkage member 3b. Both ends of each linkage rod 3r are respectively connected to two moving iron cores 31, that is, the central axis of each linkage rod 3r is parallel to the second direction. The linkage member 3b is arranged in the middle of the linkage rod 3r and is linked and connected to the contact mechanism 20 of at least one contact unit 2. When the number of contact units 2 is large or the length of the moving iron core 31 in the third direction is large, the number of linkage rods 3r is two or more. Two adjacent linkage rods 3r are arranged side by side in the third direction, which is beneficial to ensuring the stable linkage of the two electromagnetic drive mechanisms 3m. In the third direction, preferably, the linkage member 3b is drivingly connected to the contact mechanism 20 of one or two contact units 2 located in the middle position, which is beneficial to ensuring the synchronization of the opening and closing actions of all contact mechanisms 20.

[0045] As Figure 3 , 4 As shown, the linkage member 3b includes a block-shaped linkage member body 30b. An opening groove serving as an avoidance groove 31b is formed in the middle of one side of the linkage member body 30b. The opening of the avoidance groove 31b faces the contact mechanism 20 of the contact unit 2, which is beneficial to reducing the space occupied by the linkage member 3b in the first direction (height direction). A first linkage hole 300b for the linkage member 3b to pass through is formed in the other side of the linkage member body 30b. In the figure, the avoidance groove 31b and the first linkage hole 300b are arranged along the middle line position of the linkage member 3b, making the linkage member 3b have a symmetrical structure.

[0046] Of course, the linkage assembly may also only include the linkage rod 3r. Both ends of the linkage rod 3r are respectively linked and connected to the two electromagnetic drive mechanisms 3m. The middle of the linkage rod 3r is connected to at least one moving contact assembly 21, or the middle of the linkage rod 3r is connected to a transmission rod 3c connected between the two moving contact assemblies 21, which can also drive all contact mechanisms 20.

[0047] At least one second linkage hole 320b is formed at both ends of the linkage member 3b. The central axis of the second linkage hole 320b penetrates both sides of the opening of the avoidance groove 31b, that is, the central axis of the second linkage hole 320b is perpendicular to the central axis of the first linkage hole 300b. In this embodiment, the central axis of the first linkage hole 300b is parallel to the first direction, and the central axis of the second linkage hole 320b is parallel to the third direction. The linkage member 3b is linked and connected to the contact mechanism 20 through the second linkage hole 320b. When multiple contact mechanisms 20 are linked and connected, the transmission rod 3c linked between two adjacent contact mechanisms 20 can pass through the second linkage hole 320b, thereby enabling the linkage member 3b to drive the contact mechanism 20. Figure 4Among them, both ends of the linkage member 3b protrude and extend outward along directions away from the opening of the avoidance groove 31b respectively, so that both end portions on both sides of the opening of the avoidance groove 31b form linkage bridge arms 32b. Each second linkage hole 320b is correspondingly opened on the linkage bridge arm 32b. A third limiting groove 33b is opened on the side of the linkage bridge arm 32b facing the contact unit 2. One end of the elastic reset member 7 is elastically abutted against the third limiting groove 33b. In the figure, the elastic reset member 7 is a spring 2021 with one end arranged along the first direction. One end of the spring 2021 is cooperated with the third limiting groove 33b, and the other end is in limiting cooperation with the contact unit 2.

[0048] Combined Figures 3-8 Provide a specific structure of the contact unit 2.

[0049] The contact unit 2 includes a pair of terminal blocks t, a contact mechanism 20 and two arc extinguishing systems. Among them, the pair of terminal blocks t are arranged at intervals in the second direction. The contact mechanism 20 is connected between the pair of terminal blocks t for controlling the on and off of the main circuit of each contact unit 2. Each arc extinguishing system is arranged between the contact mechanism 20 and a terminal block t. Each arc extinguishing system includes an arc extinguishing chamber 24. The incoming arc opening of the arc extinguishing chamber 24 is connected with the contact mechanism 20. One end of the arc extinguishing chamber 24 far from the incoming arc opening is provided with an exhaust hole for discharging tail gas. Among them, the terminal block t and the arc extinguishing chamber 24 can adopt the prior art.

[0050] Such as Figures 3-7 As shown, the contact mechanism 20 includes a moving contact assembly 21 and a static contact group 22 that are spaced oppositely in the first direction. The static contact group 22 includes two static contacts 220. In the second direction, the two static contacts 220 are arranged at intervals between the two terminal blocks t. A static contact portion is provided at the first end of each static contact 220. The middle of the static contact 220 extends along the side close to the arc extinguishing chamber 24, so that the second end of the static contact 220 is connected to a terminal block t. The moving contact assembly 21 includes a contact support 200 and a moving contact bridge 201 connected to the contact support 200. A protruding linkage portion 200b is provided on the side of the contact support 200 facing away from the moving contact bridge 201. The adjacent two linkage portions 200b are linked and connected through a transmission rod 3c. Both ends of the moving contact bridge 201 are respectively used as moving contact portions 2011. Each moving contact portion 2011 contacts or separates from a corresponding static contact portion at the incoming arc opening of the arc extinguishing chamber 24.

[0051] Preferably, one end of the contact support 200 serves as the linkage portion 200b. At least one connection hole 2010b is opened on the linkage portion 200b. Each connection hole 2010b passes through a transmission rod 3c for linking and connecting the adjacent two linkage portions 200b together. An assembly cavity is opened at the other end of the contact support 200. The moving contact bridge 201 is arranged through the assembly cavity, and the two moving contact portions 2011 respectively extend outside the assembly cavity.

[0052] Combination Figures 5-8 A specific structure of a moving contact assembly 21 is provided, the moving contact assembly 21 includes a contact support 200 and a moving contact bridge 201, wherein the contact support 200 includes an integrally formed linkage portion 200b and a bearing portion 200c, one end of the linkage portion 200b is provided with two parallel connection holes 2010b, the other end of the linkage portion 200b is connected to one end of the bearing portion 200c, preferably, the bearing portion 200c is a T-shaped hollow body, after the linkage portion 200b is connected to the bearing portion 200c, the contact support 200 is in a cross shape as a whole, wherein the top wall 2001c of the bearing portion is connected to the linkage portion 200b, respectively. On both sides of the other end of 00b, the end wall of the load-bearing part 200c away from one end of the linkage part 200b serves as the bottom wall 2002c of the load-bearing part, and two pairs of side walls are connected between the bottom wall 2002c of the load-bearing part and the top wall 2001c of the load-bearing part, one pair of side walls are respectively the front wall 2003c of the load-bearing part and the rear wall 2004c of the load-bearing part, and the other pair of side walls are respectively the left wall of the load-bearing part and the right wall of the load-bearing part, and the inner hollow area of ​​the load-bearing part 200c serves as an assembly cavity, and the left wall and the right wall of the load-bearing part are opened as an installation port connected to the assembly cavity, and the two ends of the moving contact bridge 201 extend from the installation port to the outside of the contact support 200 respectively.

[0053] like Figures 5-8 As shown, the moving contact bridge 201 is in the shape of a straight plate as a whole, and the middle part of the moving contact bridge 201 is arranged through the assembly cavity. The two ends of the moving contact bridge 201 respectively serve as moving contact parts 2011 and extend out of the assembly cavity from two installation openings. A moving contact point 2012 is provided on the side of each moving contact part 2011 facing the static contact 220, and the end of each moving contact part 2011 is bent in the direction away from the static contact 220 to form a limiting part 201. When the moving contact assembly 21 is in the opening position, the limiting part 201 can cooperate with the limiting platform 23h in the switch device, so as to limit the moving range of the moving contact bridge 201.

[0054] like Figures 5-7 As shown, the first end of the static contact 220 is spaced opposite to the moving contact assembly 21, and the first end is folded back and extended to form a static contact portion, the static contact portion is spaced opposite to the moving contact assembly 21, and a static contact point 2201 is provided on the side of the static contact portion facing the moving contact assembly 21, and a gap is left between the static contact portion facing away from the static contact point 2201 and the first end of the static contact 220, and the middle part of the static contact 220 extends along one side of the arc extinguishing chamber 24, so that the second end of the static contact 220 is connected to a terminal t.

[0055] In this embodiment, the static contact 220 includes a static contact plate 2200, and the static contact plate 2200 includes a first plate and a second plate which are parallel to each other and extend in opposite directions. In the figure, the first plate and the second plate extend along the second direction away from and close to the terminal t, respectively, wherein the first plate and the second plate serve as the first end and the second end of the static contact 220, respectively, and a connecting section is connected between the first plate and the second plate. The end of the first plate extends and folds back to form a static contact portion spaced opposite to the first plate 22001, and a gap is left between the static contact portion and the first plate. A static contact point 2201 is provided on the side of the static contact portion facing the moving contact portion 2011, and the static contact point 2201 cooperates with the moving contact point 2012 of the moving contact portion 2011, and the end of the static contact portion is deflected toward the direction close to the first plate to form a connecting portion.

[0056] In this embodiment, if Figure 5 , 6 As shown, each contact unit 2 also includes a unit housing 2h, and the contact mechanism 20, the arc extinguishing system and the terminal t are arranged in the unit housing 2h, which is conducive to forming a modular structure. Preferably, the contact mechanism 20 is arranged in the unit housing 2h, and the terminal t is arranged on the outside of both ends of the unit housing 2h and correspondingly arranged in the wiring slot of the shell. The unit housing 2h is provided with a threading hole at the position corresponding to the terminal t, and the second end of the static contact 220 is connected with the terminal t through the threading hole; the arc extinguishing system is correspondingly arranged in the unit housing 2h between the contact mechanism 20 and a terminal t, and unit exhaust ports 2e connected to the arc extinguishing system are respectively opened at both ends of the unit housing 2h to facilitate the exhaust of exhaust gas. The unit exhaust port 2e corresponds to the wiring slot of the shell, which can both discharge the exhaust gas and reduce the number of holes opened on the shell.

[0057] like Figure 5 As shown, a linkage groove 20h is opened in the middle of the unit housing 2h, and the central axis of the linkage groove 20h is parallel to the first direction. The moving contact assembly 21 is linked to the linkage assembly through the linkage groove 20h, and the linkage part 200b corresponds to the linkage groove 20h for being linked to the electromagnetic operating system 3. At the same time, adjacent moving contact assemblies 21 are also linked through the linkage part 200b, that is, the two linkage parts 200b are linked through the transmission rod 3c. The electromagnetic operating system 3 is driven and connected to the transmission rod 3c connected between the two linkage parts 200b, and all the moving contact assemblies 21 can be driven synchronously, thereby ensuring the consistency of the actions of multiple moving contact assemblies 21.

[0058] like Figure 5As shown, a first limiting groove 22h is provided on each side of the linkage groove 20h. Each first limiting groove 22h corresponds to the upper part of the arc extinguishing system in the first direction, and the bottom surface of the first limiting groove 22h is recessed towards the inside of the unit housing 2h. Assembling each electromagnetic driving mechanism 3m in a first limiting groove 22h can reduce the height protruding from the unit housing 2h in the first direction, which not only ensures the assembly stability but also helps to reduce the overall height of the switching device. In this embodiment, the middle part of the bottom surface of the first limiting groove 22h is recessed towards the inside of the unit housing 2h to form a stepped surface. The lower region in the middle is used to limit the coil assembly 32 in the electromagnetic driving mechanism 3m, and the higher region surrounding the lower region in the middle serves as a yoke mounting groove 2g, and the yoke arranged around the outside of the coil assembly 32 is correspondingly limited therein; at least on one side of the linkage groove 20h, a semi-circular groove is provided in the unit housing 2h. The semi-circular groove and the linkage groove 20h are arranged side by side in the third direction. Adjacent unit housings 2h are arranged side by side, so that the two semi-circular grooves are butted to form a circular second limiting groove 2l. Each second limiting groove 2l is spaced opposite to the third limiting groove 33b for limiting and assembling an elastic reset member 7. In this way, each elastic reset member 7 is located between two adjacent linkage parts 200b.

[0059] Inside the unit housing 2h corresponding to the linkage groove 20h, a limiting platform 23h is further provided. The limiting platform 23h is spaced opposite to the static contact group 22, so that the moving contact bridge 201 moves between the static contact group 22 and the limiting platform 23h. In the opening position, the limiting part 201 abuts against the limiting platform 23h, thereby restricting the moving range of the moving contact bridge 201. When the moving contact bridge 201 is repelled, the abutting cooperation between the limiting part 201 of the moving contact bridge 201 and the limiting platform 23h enables the contact support 200 to reset the elastic device 202 when it moves to the opening position.

[0060] In this embodiment, each arc extinguishing system includes an arc extinguishing chamber 24, an arc guiding plate 27, and a magnetic enhancing member 23. The arc extinguishing chamber 24 and the arc guiding plate 27 can adopt existing structures. Each moving contact part 2011 corresponds to the arc inlet of the arc extinguishing chamber 24. One end of the arc guiding plate 27 is connected to the end of the static contact part. That is, one end of the arc guiding plate 27 is connected to the connecting part 22005, and the other end of the arc guiding plate 27 extends into the arc extinguishing chamber 24 along one side of the arc inlet. An exhaust hole for exhausting tail gas is provided at one end of the arc extinguishing chamber 24 away from the arc inlet.

[0061] The magnetic enhancing member 23 is preferably in a strip-shaped plate structure. The middle part of the magnetic enhancing member 23 passes through the gap between the static contact part and the first end of the static contact 220. The two ends of the magnetic enhancing member 23 are bent and extended towards the moving contact part 2011 respectively to form magnetic enhancing walls. Each moving contact part 2011 contacts or separates from the static contact part within the gap between the two magnetic enhancing walls, enhancing the magnetic field at the moving contact part 2011 and the static contact part, which is beneficial to introducing the arc generated when the contact mechanism 20 is disconnected into the arc extinguishing chamber 24, and improving the arc introducing and arc extinguishing efficiency.

[0062] In this embodiment, each arc extinguishing system further includes a pair of arc separating plates 26. The two arc separating plates 26 are arranged opposite to each other at intervals between the two magnetic enhancing walls. One moving contact part 2011 contacts or separates from one static contact part within the interval between the pair of arc separating plates 26. In this embodiment, the pair of arc separating plates 26 and the pair of magnetic enhancing walls are spaced opposite to each other in the third direction. The arc is separated from the magnetic enhancing walls by the arc separating plates 26 to prevent the arc from contacting the magnetic enhancing walls.

[0063] In addition, in this embodiment, an arc extinguishing channel 21h is arranged inside the unit housing 2h. The arc extinguishing channel 21h is connected between the unit exhaust port 2e and the exhaust hole. Figure 6 In, the arc extinguishing channel 21h extends in a curved manner, which is beneficial to buffering and cooling the exhaust gas discharged from the arc extinguishing chamber 24. Preferably, at least one metal partition 25 is further arranged inside the arc extinguishing channel 21h. The metal partition 25 is arranged at an angle with the side wall of the arc extinguishing channel 21h, which is used to change the direction of gas flow and can also block the impurities in the exhaust gas outside the unit housing 2h.

[0064] Each contact unit 2 further includes a current detection device 28 and a connection circuit board. The current detection device 28 is connected to the contact mechanism 20. The wiring terminal of the current detection device 28 extends outside the unit housing 2h and is connected to the connection circuit board, and the connection circuit board is connected to the control circuit board of the control system.

[0065] In this embodiment, the current detection device 28 is connected to the middle part of a static contact 220. Figure 6 In, the middle part of the static contact 220 is arranged along the gap between the arc extinguishing chamber 24 and the unit housing 2h. The wiring terminal of the current detection device 28 is located on the side of the static contact 220 facing away from the arc extinguishing chamber 24 and correspondingly extends outside the unit housing 2h. The connection circuit board is arranged to fit the outer surface of the unit housing 2h, and the connection circuit board is connected to the control circuit board of the control unit.

[0066] Preferably, an installation groove 2p for installing the connection circuit board is opened on the outer surface of the unit housing 2h. One end of the installation groove 2p is linked with the wiring terminal, and the other end extends to the side of the adjacent electromagnetic driving mechanism 3m and is communicated with the first limiting groove 22h for limiting the electromagnetic driving mechanism 3m, so that the connection circuit board and the electromagnetic driving mechanism 3m are jointly connected to the control circuit board.Figure 1 In [description], two mounting grooves 2p are formed in the outer surface of the unit housing 2h. The two mounting grooves 2p are spaced opposite to each other in the second direction. The groove depth of each mounting groove 2p is greater than or equal to the thickness of the connection circuit board, so that the connection circuit board disposed in the mounting groove 2p does not protrude from the outer surface of the unit housing 2h. In this way, the external wiring of the connection circuit board neither penetrates and contacts the unit 2 to interfere with the internal structure nor increases the thickness of the switching device.

[0067] It should be noted that in the description of the present invention, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship habitually placed during use. It is only for the convenience of description and does not indicate that the device or element referred to must have a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating relative importance.

[0068] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should all be regarded as belonging to the protection scope of the present invention.

Claims

1. Switching device, comprising a housing, an electromagnetic operating system (3) and at least one contact unit (2) are arranged in the housing. Each contact unit (2) comprises a contact mechanism (20), and the contact mechanism (20) comprises a moving contact assembly (21) and a static contact group (22) which are spaced apart in a first direction (Y). The static contact group (22) comprises two static contacts (220) which are spaced apart in a second direction (X). A moving contact portion (2011) of the moving contact assembly (21) is respectively spaced opposite to a static contact portion of a static contact (220) in the first direction (Y). The first direction (Y) is perpendicular to the second direction (X). It is characterized in that: The electromagnetic operating system (3) comprises two electromagnetic driving mechanisms (3m) and a linkage assembly. The two electromagnetic driving mechanisms (3m) are spaced apart in the second direction (X). The linkage assembly is linked between the two electromagnetic driving mechanisms (3m) and is linked with the moving contact assembly (21) of at least one contact unit (2). The linkage assembly is arranged along the first direction (Y) with the moving contact assembly (21) and drives the moving contact assembly (21) to move along the first direction (Y).

2. The switch device according to claim 1, characterized in that: The electromagnetic operating system (3) further comprises an elastic reset member (7). The elastic reset member (7) is arranged between the two electromagnetic driving mechanisms (3m). The elastic reset member (7) cooperates with the linkage assembly to reset the electromagnetic operating system (3).

3. The switching device according to claim 1, wherein: The linkage assembly at least comprises a linkage rod (3r). Two ends of the linkage rod (3r) are respectively connected with the two electromagnetic driving mechanisms (3m), and the moving contact assembly (21) is driven by the middle part of the linkage rod (3r).

4. The switching device according to claim 3, characterized in that: The linkage assembly further comprises a linkage member (3b). The linkage member (3b) is provided with at least one first linkage hole (300b). The linkage rod (3r) passes through the first linkage hole (300b) along the second direction (X). The linkage member (3b) is provided with at least one second linkage hole (320b), and the second linkage hole (320b) is used for linkage connection with the moving contact assembly (21).

5. The switching device according to claim 4, characterized in that: The linkage member (3b) is provided with at least one avoidance groove (31b) for avoiding the moving contact assembly (21). The linkage member (3b) is further provided with at least one third limiting groove (33b), and the third limiting groove (33b) cooperates with the elastic reset member (7) for resetting the electromagnetic operating system (3).

6. The switching device according to claim 1, characterized in that: The electromagnetic driving mechanism (3m) comprises a coil assembly (32) and a moving assembly. The coil assembly (32) comprises a coil bobbin and a coil wound outside the coil bobbin. The moving assembly comprises a static iron core (33) and a moving iron core (31). The static iron core (33) is fixed at one end of the coil bobbin. The moving iron core (31) is slidably arranged in the middle of the coil bobbin along the first direction (Y) and is spaced opposite to the static iron core (33). The two moving iron cores (31) are linked and connected.

7. The switching device according to claim 1, characterized in that: The contact unit (2) further comprises a unit housing (2h). The contact mechanism (20) is arranged in the unit housing (2h). The electromagnetic operating system (3) is arranged outside the unit housing (2h) along the first direction (Y).

8. The switching device according to claim 7, wherein: A linkage groove (20h) is formed in the middle of one side of the unit housing (2h). In the second direction (X), first limiting grooves (22h) are respectively formed on both sides of the linkage groove (20h). Each first limiting groove (22h) is recessed into the unit housing (2h) to form a position-limiting and assembling structure for an electromagnetic driving mechanism (3m).

9. The switching device according to claim 7, characterized in that: Each contact unit (2) further includes a current detection device (28) and a connection circuit board. The current detection device (28) is connected to the contact mechanism (20), and the wiring terminal of the current detection device (28) extends outside the unit housing (2h) to be connected to the connection circuit board. The connection circuit board is arranged in a manner that fits the outer surface of the unit housing (2h).

10. The switching device according to claim 9, characterized in that: An installation groove (2p) for installing the connection circuit board is formed on the outer surface of the unit housing (2h). One end of the installation groove (2p) is communicated with the wiring terminal, and the other end extends to one side of the adjacent electromagnetic driving mechanism (3m) and is communicated with the first limiting groove (22h) for limiting the electromagnetic driving mechanism (3m).

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