A load switch

Abstract

This application provides a load switch, relating to the field of low-voltage electrical technology, comprising: a housing, within which are disposed a coil assembly, an armature assembly, a transmission rod, and a contact system. The coil assembly, when energized, drives the armature assembly to rotate. The armature assembly, via the transmission rod, drives the moving contact of the contact system to move along a first direction, achieving opening and closing with the stationary contact. The moving contact has two contacts along a second direction. Using a transmission rod for driving simplifies the overall structure of the load switch, saves space, facilitates installation, and ensures smooth operation of the contact system, thereby improving the working stability of the load switch. Both the moving and stationary contacts are double-contact contacts. When using double-contact contacts, the cumulative opening distance of the contacts on both sides forms the overall opening distance of the contact system. This results in a smaller opening distance on each side, making the overall structure of the contact system more compact, thus enhancing the overall compactness of the load switch.

Description

Technical Field

[0001] This application relates to the field of low-voltage electrical technology, specifically to a load switch. Background Technology

[0002] Load switches typically achieve opening and closing by using a magnetic system and an electromagnetic drive contact system. Current load switches employ complex power structures for their contact drive systems, often using four-bar linkages, resulting in a bulky overall structure. This complexity also presents challenges for installation and maintenance. Utility Model Content

[0003] The purpose of this application is to provide a load switch that has a compact structure and good stability.

[0004] In one aspect of this application, a load switch is provided, including a housing. The housing contains a coil assembly, an armature assembly, a transmission rod, and a contact system. When the coil assembly is energized, it drives the armature assembly to rotate. The armature assembly drives the moving contact of the contact system to move along a first direction via the transmission rod, thereby realizing the opening and closing of the switch with the stationary contact. The moving contact has two contact points along a second direction, and the first and second directions are perpendicular to each other.

[0005] Optionally, the armature assembly includes a rotating component and a crank, with both ends of the crank connected to the rotating component and the transmission rod, respectively.

[0006] Optionally, the contact system further includes a mounting base, a through groove is provided in the mounting base, and the moving contact is disposed in the through groove; the mounting base is provided with a connecting part for connecting the transmission rod and the moving contact, and the transmission rod drives the mounting base and the moving contact to move through the connecting part.

[0007] Optionally, a mounting hole is formed on the connecting part, and one end of the transmission rod is hinged to the connecting part through the mounting hole.

[0008] Optionally, the transmission rod is V-shaped, and the other end of the transmission rod is hinged to the crank.

[0009] Optionally, the mounting base is further connected to a guide portion at its bottom along the first direction, and the guide portion is disposed in a slot in the housing.

[0010] Optionally, the guide portion is further provided with a rib on its outer wall along the second direction, and the guide portion slides within the slot of the housing via the rib.

[0011] Optionally, it further includes a first wiring component and a second wiring component, the first wiring component and the second wiring component being connected to the two contacts of the stationary contact, respectively, the first wiring component being arranged in a U-shape so that at least a portion of the current in the first wiring component is opposite to the current direction of the moving contact.

[0012] Optionally, the second wiring component is U-shaped, such that at least a portion of the current in the second wiring component is opposite to the current direction of the moving contact;

[0013] The first wiring component and the second wiring component are respectively disposed on both sides of the moving contact along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0014] Optionally, the axis of the coil assembly is along the first direction, the armature assembly is disposed on one side of the coil assembly along the second direction, and the armature assembly and the coil assembly are located above the contact system and the first wiring component and the second wiring component along the first direction.

[0015] The load switch provided in this application embodiment transmits a magnetic field to the armature assembly, causing it to rotate. The armature assembly and the moving contact are connected by a crank and a transmission rod. The armature assembly drives the moving contact to move vertically up and down in a first direction via the crank and transmission rod. Compared to existing four-bar linkage mechanisms, this application uses a crank and transmission rod for driving, simplifying the overall structure of the load switch, saving space, facilitating installation, and smoothly driving the contact system to achieve opening and closing, thereby improving the working stability of the load switch.

[0016] The moving contact and the stationary contact are both double-contact contacts. When using double-contact contacts, the cumulative opening distance of the contacts on both sides forms the overall opening distance of the contact system. In this way, the opening distance of the contacts on one side is small, which can make the overall structure of the contact system compact, and thus also enhance the overall structural compactness of the load switch. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the load switch structure provided in the embodiments of this application;

[0019] Figure 2 This is one of the partial structural schematic diagrams of the load switch provided in the embodiments of this application;

[0020] Figure 3 This is the second schematic diagram of a partial structure of a load switch provided in the embodiments of this application;

[0021] Figure 4 This is the third partial structural schematic diagram of the load switch provided in the embodiments of this application;

[0022] Figure 5 This is a schematic diagram of the load switch housing structure provided in an embodiment of this application;

[0023] Figure 6 This is the fourth partial structural schematic diagram of the load switch provided in the embodiments of this application;

[0024] Figure 7 This is the fifth partial structural schematic diagram of the load switch provided in the embodiments of this application.

[0025] Icons: 10-Housing; 10a-Slot; 11-Coil assembly; 111-First yoke; 112-Second yoke; 12-Armature assembly; 120-Rotating component; 121-First armature; 122-Second armature; 123-Crank; 13-Drive rod; 14-Contact system; 140-Connecting part; 140a-Mounting hole; 141-Moving contact; 142-Stationary contact; 143-Mounting base; 143a-Through slot; 144-Guide part; 144a-Rib; 151a-First wiring component; 151a1-First wiring segment; 151b-First wiring terminal; 152a-Second wiring component; 152a1-Second wiring segment; 152b-Second wiring terminal; F1-First direction; F2-Second direction; F3-Third direction. Detailed Implementation

[0026] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0027] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0028] It should also be noted that, unless otherwise explicitly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0029] Please refer to Figure 1 As shown, this application embodiment provides a load switch, including: a housing 10, in which a coil assembly 11, an armature assembly 12, a transmission rod 13 and a contact system 14 are disposed. When the coil assembly 11 is energized, it drives the armature assembly 12 to rotate. The armature assembly 12 drives the moving contact 141 of the contact system 14 to move along the first direction F1 through the transmission rod 13, thereby realizing the opening and closing of the switch with the stationary contact 142. The moving contact 141 and the stationary contact 142 are both double-contact contacts. Both the moving contact 141 and the stationary contact 142 are provided with two contacts along the second direction F2.

[0030] When the coil assembly 11 is energized, it drives the armature assembly 12 to rotate. When the armature assembly 12 rotates, it drives the transmission rod 13 to move, which in turn drives the moving contact 141 of the contact system 14 to move in the first direction F1, so as to achieve contact or separation with the stationary contact 142.

[0031] Among them, such as Figure 2 As shown, the coil assembly 11 is provided with a first magnetic yoke 111 and a second magnetic yoke 112 that are arranged opposite to each other along the first direction F1.

[0032] The armature assembly 12 includes a rotating member 120, a permanent magnet disposed within the rotating member 120, and a crank 123 connected to the rotating member 120. The crank 123 is also connected to a transmission rod 13. The armature assembly 12 also includes a first armature 121 and a second armature 122 disposed opposite to each other on both sides of the permanent magnet along the second direction F2. The permanent magnet, the first armature 121, and the second armature 122 are fixed by the rotating member 120. The first yoke 111 and the second yoke 112 extend to the space between the protruding ends of the first armature 121 and the second armature 122, respectively.

[0033] When the coil is energized, it generates a magnetic field, which is transmitted to the first armature 121 and the second armature 122 through the first yoke 111 and the second yoke 112 to drive the armature assembly 12 to rotate.

[0034] After the armature assembly 12 rotates, the upper ends of the first magnetic yoke 111 and the second armature 122 abut together, and the lower ends of the second magnetic yoke 112 and the first armature 121 abut together to transmit the magnetic field; similarly, when the armature assembly 12 is driven to rotate in the opposite direction, the upper ends of the first magnetic yoke 111 and the first armature 121 abut together, and the lower ends of the second magnetic yoke 112 and the second armature 122 abut together to transmit the magnetic field.

[0035] In this application, the coil assembly 11 transmits the magnetic field to the armature assembly 12, causing it to rotate. The armature assembly 12 and the moving contact 141 are connected by a crank 123 and a transmission rod 13. The armature assembly 12 drives the moving contact 141 to move vertically up and down in the first direction F1 via the crank 123 and the transmission rod 13. Compared with existing four-bar linkages, this application uses a crank-connecting rod mechanism formed by the crank 123 and the transmission rod 13 to achieve the drive, which simplifies the overall structure of the load switch, saves space, facilitates installation, and can smoothly drive the contact system 14 to achieve opening and closing, thereby improving the working stability of the load switch.

[0036] Furthermore, the moving contact 141 and the stationary contact 142 in this application are both double-contact contacts. When double-contact contacts are used, the cumulative opening distance of the contacts on both sides forms the overall opening distance of the contact system 14. In this way, the opening distance of the contacts on one side is small, which can make the overall structure of the contact system 14 compact, thereby enhancing the overall structural compactness of the load switch.

[0037] Specifically, one end of the crank 123 is connected to the rotating part 120 of the armature assembly 12, and the other end of the crank 123 is used to connect the transmission rod 13. The transmission rod 13 is connected to the moving contact 141 to realize the linear movement of the moving contact 141 in the first direction F1.

[0038] The moving contact 141 has two contacts, which are disposed opposite to each other at the end of the moving contact 141 along the second direction F2; the stationary contact 142 is located below the moving contact 141 along the first direction F1, and the stationary contact 142 also has two contacts along the second direction F2, so that they correspond one-to-one with the two contacts of the moving contact 141.

[0039] Reference Figure 3 , Figure 4 As shown, the contact system 14 also includes a mounting base 143. The mounting base 143 is provided with a connecting part 140 for connecting the transmission rod 13 and the moving contact 141. A through groove 143a is provided in the mounting base 143, and the moving contact 141 is disposed in the through groove 143a. The transmission rod 13 drives the mounting base 143 and the moving contact 141 to move as a whole through the connecting part 140.

[0040] The connecting part 140 is provided on the mounting base 143. A mounting hole 140a is formed on the connecting part 140. One end of the transmission rod 13 is installed in the mounting hole 140a to be hinged with the connecting part 140. The connecting part 140 drives the moving contact 141 to move linearly in the first direction F1. The other end of the transmission rod 13 is hinged with the crank 123.

[0041] like Figure 1 , Figure 2As shown in the example of this application, the transmission rod 13 is arranged in a V-shape, which can avoid interference between the transmission rod 13 and other components inside the housing 10, and prevent the transmission rod 13 from affecting other components when it moves.

[0042] The bottom of the mounting base 143 along the first direction F1 is also connected to a guide portion 144. The guide portion 144 and the mounting base 143 are disposed in the slot 10a of the housing 10 to guide the movement of the mounting base 143, ensuring that the moving contact 141 moves along the slot 10a, and thus opens and closes with the stationary contact 142. Figure 5 As shown.

[0043] A rib 144a is also formed on the outer wall of the guide portion 144 along the second direction F2, and the guide portion 144 slides within the slot 10a of the housing 10 by means of the rib 144a.

[0044] Mounting base 143 and guide portion 144 are fixedly connected. The protruding rib 144a on guide portion 144 cooperates with the slot 10a of housing 10. The setting of protruding rib 144a can reduce the friction between it and slot 10a, making the contact area between guide portion 144 and slot 10a smaller, and guide portion 144 and mounting base 143 can slide more smoothly along the first direction F1.

[0045] like Figure 6 , Figure 7 As shown, it also includes a first wiring component 151a and a second wiring component 152a. The first wiring component 151a and the second wiring component 152a are respectively connected to the two contacts of the stationary contact 142. The first wiring component 151a is U-shaped so that at least a portion of the current in the first wiring component 151a is opposite to the current direction of the moving contact 141. Furthermore, the second wiring component 152a is U-shaped so that at least a portion of the current in the second wiring component 152a is opposite to the current direction of the moving contact 141.

[0046] One end of the first wiring component 151a is also connected to the first wiring terminal 151b, and one end of the second wiring component 152a is also connected to the second wiring terminal 152b. The first wiring terminal 151b and the second wiring terminal 152b are both arranged along the first direction F1. After the moving contact 141 and the stationary contact 142 come into contact, the current flows through the first wiring terminal 151b and the first wiring component 151a to the moving contact 141, and then flows out through the second wiring component 152a and the second wiring terminal 152b; or the current flows through the second wiring terminal 152b and the second wiring component 152a, and then flows out through the moving contact 141, the first wiring component 151a, and the first wiring terminal 151b.

[0047] like Figure 6As shown, the first wiring component 151a is U-shaped and has a first wiring segment 151a1 along the second direction F2; the second wiring component 152a is U-shaped and has a second wiring segment 152a1 along the second direction F2; the moving contact 141 along the third direction F3 is located between the first wiring component 151a and the second wiring component 152a.

[0048] Figure 7 The red dashed line shows the direction of current flow from the first terminal 151b and the first connecting member 151a to the moving contact 141, while the blue dashed line shows the direction of current flow when the current flows from the first terminal 151b to the second terminal 152b. Figure 7 As can be seen, the current direction of the first connecting segment 151a1 and the second connecting segment 152a1 are both towards the right, while the current direction of the moving contact 141 is towards the left. That is to say, the current of the first connecting segment 151a1 of the first connecting component 151a is opposite to the current direction of the moving contact 141, and the current of the second connecting segment 152a1 of the second connecting component 152a is opposite to the current direction of the moving contact 141. This makes the magnetic field generated by the first connecting segment 151a1 and the second connecting segment 152a1 effectively act on the moving contact 141, increasing the contact force between the moving contact 141 and the stationary contact 142. The moving contact 141 can press the stationary contact 142 below it, ensuring stable contact between the moving contact 141 and the stationary contact 142. This prevents the moving contact 141 and the stationary contact 142 from being separated due to repulsion under abnormal circuit fault conditions such as abnormal current, thereby improving the short-term withstand capability and operational stability of the load switch.

[0049] Figure 7 In the circuit, the current forms a U-shaped loop between the first terminal 151a1 and the moving contact 141. Similarly, the current also forms a U-shaped loop between the stationary contact 142 and the second terminal 152a1, so that the load switch forms a double U-shaped current loop.

[0050] This application employs a double U-shaped current loop, which makes the current distribution more uniform, reduces local overheating of the contacts, and thus improves the current carrying capacity of the contact system 14. Furthermore, it can optimize the magnetic field distribution, making the magnetic field more concentrated and stable, which helps to improve the arc extinguishing performance of the contact system 14, thereby improving the overall breaking capacity.

[0051] In addition, the first wiring component 151a and the second wiring component 152a are also wrapped with insulating material to improve the safety of the contact system 14.

[0052] In the overall layout of the load switch, the first wiring component 151a and the second wiring component 152a are respectively located on both sides of the moving contact 141 along the third direction F3. This arrangement allows for a compact layout of the contact system 14 and the first wiring component 151a and the second wiring component 152a.

[0053] The axis of the coil assembly 11 is along the first direction F1, while the armature assembly 12 is disposed on one side of the coil assembly 11 along the second direction F2. The armature assembly 12 and the coil assembly 11 are located above the contact system 14 and the first wiring component 151a and the second wiring component 152a along the first direction F1, making the overall layout of the load switch reasonable and compact.

[0054] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A load break switch characterized by, include: The housing (10) contains a coil assembly (11), an armature assembly (12), a transmission rod (13), and a contact system (14). When the coil assembly (11) is energized, it drives the armature assembly (12) to rotate. The armature assembly (12) drives the moving contact (141) of the contact system (14) to move along the first direction (F1) through the transmission rod (13), thereby opening and closing the circuit with the stationary contact (142). The moving contact (141) has two contacts along the second direction (F2), and the first direction (F1) and the second direction (F2) are perpendicular.

2. The load break switch according to claim 1, characterized in that The armature assembly (12) includes a rotating component (120) and a crank (123), with the two ends of the crank (123) connected to the rotating component (120) and the transmission rod (13), respectively.

3. The load break switch according to claim 2, characterized in that The contact system (14) further includes a mounting base (143), a through groove (143a) is provided in the mounting base (143), and the moving contact (141) is disposed in the through groove (143a); the mounting base (143) is also provided with a connecting part (140) for connecting the transmission rod (13) and the moving contact (141), and the transmission rod (13) drives the mounting base (143) and the moving contact (141) to move through the connecting part (140).

4. The load break switch according to claim 3, characterized in that The connecting part (140) has a mounting hole (140a) formed on its upper surface, and one end of the transmission rod (13) is hinged to the connecting part (140) through the mounting hole (140a).

5. The load break switch according to claim 4, characterized in that The transmission rod (13) is V-shaped, and the other end of the transmission rod (13) is hinged to the crank (123).

6. The load switch according to claim 3, characterized in that, The mounting base (143) is also connected to a guide portion (144) at the bottom along the first direction (F1), and the guide portion (144) is disposed in the slot (10a) of the housing (10).

7. The load break switch according to claim 6, characterized in that The guide portion (144) also has a raised rib (144a) formed on the outer wall along the second direction (F2), and the guide portion (144) slides within the slot (10a) of the housing (10) by means of the raised rib (144a).

8. The load switch of claim 1, wherein, It also includes a first wiring component (151a) and a second wiring component (152a), the first wiring component (151a) and the second wiring component (152a) being connected to the two contacts of the stationary contact (142) respectively. The first wiring component (151a) is arranged in a U-shape so that at least a portion of the current in the first wiring component (151a) is opposite to the current direction of the moving contact (141).

9. The load break switch according to claim 8, characterized in that The second wiring component (152a) is U-shaped so that at least a portion of the current in the second wiring component (152a) is opposite to the current direction of the moving contact (141); The first wiring component (151a) and the second wiring component (152a) are respectively disposed on both sides of the moving contact (141) along a third direction (F3), and the first direction (F1), the second direction (F2) and the third direction (F3) are perpendicular to each other.

10. The load break switch according to any one of claims 1 to 9, characterized in that The axis of the coil assembly (11) is along the first direction (F1), and the armature assembly (12) is disposed on one side of the coil assembly (11) along the second direction (F2). The armature assembly (12) and the coil assembly (11) are located above the contact system (14) and the first wiring component (151a) and the second wiring component (152a) along the first direction (F1).

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