Electrical apparatus with arc chamber assembly

Abstract

An electrical device includes a switch assembly and an arc chute housing. The arc chute housing includes a housing body, one or more magnets arranged along one or more sides of the housing body, and one or more brackets disposed above the magnets to maintain the magnets coupled to the housing body. The arc chute housing can also include a cover, which can include one or more snap features to maintain a moving contact in an open position, for example, to prevent current flow through the electrical device.

Description

Technical Field

[0001] This disclosure relates to electrical switching devices, such as contactor devices and electrical fuse devices, and more specifically to improved housings and manufacturing techniques for housings. Background Technology

[0002] Many conventional devices are known for selectively connecting or disconnecting electrical equipment. Electrical contactors (e.g., high-voltage DC contactors) and fuses (e.g., electrical fuses and / or pyrotechnic fuses) are conventionally available in and used in electrical systems. Contactors can be configured to interrupt or connect circuits to control power to and / or from equipment.

[0003] In many conventional systems, contactors are configured as switches, for example, to selectively allow / disallow the flow of current. In some examples, one or more moving contacts may be coupled to a shaft. In these examples, the shaft may be movable, for example, actuated by an actuator to selectively move the moving contacts into and out of contact with one or more fixed contacts. In some examples, the shaft (and the moving contacts) may be biased away from the fixed contacts, for example, to “disconnect” the contactor and prevent current from flowing through it. For example, a return spring may bias the shaft to the disconnected position. Many conventional contactors include a housing that defines an internal volume (also known as an arc-extinguishing chamber). The requirements for this housing can vary considerably when manufacturing and assembling conventional equipment. Typically, aspects of sensing devices are manufactured to meet the most stringent industry standards (e.g., for high-power systems), but these devices are over-designed and inefficient in lower-power systems.

[0004] Therefore, there is a need in the art for improved switching devices and methods of manufacturing such devices. There is also a need in the art for improved devices that are modular and can be used in a variety of applications with different requirements. Summary of the Invention

[0005] This technology relates to improved electrical equipment and methods of manufacturing and using these equipment. In examples, aspects of this disclosure relate to improved switchgear having a modular arc-extinguishing chamber housing. For instance, aspects of this disclosure may relate to providing housing assemblies and / or systems that can be used with multiple different electrical devices, for example, to meet the requirements of those devices. The modularity and simplicity provided by aspects of this disclosure can lead to improved safety outcomes, for example, by ensuring the arc-extinguishing chamber is suitable for a particular system, device, and / or application. In other examples, aspects of this disclosure may relate to providing systems and components that offer more efficient assembly and / or testing and / or are more cost-effective. Attached Figure Description

[0006] To make it easier for those skilled in the art to understand how to manufacture and use the systems and technologies disclosed herein, reference may be made to the following figures.

[0007] Figure 1 It is a perspective view of electrical equipment according to various aspects of this disclosure, including the arc-extinguishing chamber housing and the switch assembly.

[0008] Figure 2 yes Figure 1 The exploded perspective view of the arc-extinguishing chamber shell according to various aspects of this disclosure is shown.

[0009] Figure 3 yes Figure 2 The present invention discloses perspective views of various aspects of the arc-extinguishing chamber shell.

[0010] Figure 4A and Figure 4B It was cut along section line 4-4. Figure 1 Cross-sectional views of exemplary embodiments of electrical devices according to various aspects of the present disclosure are shown, respectively, of the electrical devices in a closed configuration and in a locked-out configuration.

[0011] Figure 5A and Figure 5B It was cut along section line 4-4. Figure 1 Cross-sectional views of alternative embodiments of electrical equipment according to various aspects of the present disclosure are shown, respectively, of the electrical equipment in a closed configuration and in a locked-out configuration. Detailed Implementation

[0012] This technology overcomes many problems of existing technologies related to electrical equipment. In short, this technology provides improved electrical equipment, including contactor designs capable of realizing the functionality of high-voltage switchgear, low-voltage switchgear, and / or fast-disconnection equipment. In an example, the device facilitates three discrete operating states, including a first operating state where the switch is open (e.g., during normal operation). The first operating state can be a default operating state. In the first operating state, no voltage or current flows through the device. The second operating state can be a closed state. For example, in the second operating state, a coil can be energized to move one or more moving contacts to contact one or more fixed contacts, thereby closing the circuit. In the second operating state, current (e.g., current from a voltage source) can flow through the device. The third operating state can be a triggered or disconnected state. For example, the third operating state can be a state where the switch is fully open to provide insulation, for example, by preventing current from flowing through the device. For example, and as detailed herein, the third state can be a permanent disconnection of internal components of the device, for example, to prevent current from flowing between these components.

[0013] In various aspects of this disclosure, the electrical equipment may be configured as a modular device, such as including a switching assembly and an arc-extinguishing chamber assembly. In examples, the switching assembly may include features associated with a contactor (e.g., moving contacts, fixed contacts, actuating components, and / or the like) and / or features associated with a fast-disconnecting component (e.g., a pyrotechnic element).

[0014] An arc-extinguishing chamber assembly according to various aspects of this disclosure may include a housing body typically configured to define an arc-extinguishing volume, within which, for example, some switching components may operate. The housing body may support one or more arc-extinguishing magnets. The arc-extinguishing chamber assembly may also include one or more supports configured to hold the arc-extinguishing magnets on the housing body. The arc-extinguishing chamber assembly may also include a cover coupled to the housing body to at least partially define the arc-extinguishing volume. In some examples, the cover may include one or more snap-fit ​​features. The snap-fit ​​features may be configured to position the electrical equipment in the third operating state described above.

[0015] In the example, the electrical equipment according to this disclosure is normally used in the first and second operating states, while the third operating state is generated by an overcurrent / fault condition.

[0016] In various aspects of this disclosure, the arc-extinguishing chamber assembly can be a modular assembly, for example, easily configurable for different electrical devices. For instance, aspects of this disclosure provide a housing body that facilitates the use of different magnets and / or different covers. For example, high-power applications may require certain types of rare-earth magnets to suppress faults, while lower-power applications may use cheaper and / or more readily available magnets to safely mitigate faults. Similarly, some high-performance applications may require insulating materials such as glass-reinforced plastics, while other applications use different (e.g., cheaper) polymers for adequate insulation. Various aspects of this disclosure provide an arc-extinguishing chamber assembly that can be easily modified or configured for a given use case, avoiding the need for costly and time-consuming engineering, reengineering, testing, and / or similar work for different applications.

[0017] Without limitation, the devices and techniques described herein can provide improved electrical equipment that is less complex, less costly to manufacture and use, and / or offers improved safety and / or enhanced system protection compared to similar conventional systems. Furthermore, while aspects of this disclosure may be particularly useful in certain applications (such as high-voltage automotive systems), the systems and techniques described herein can be used for any electrical equipment requiring an arc-extinguishing chamber.

[0018] Various aspects of this disclosure will now be explained in more detail with reference to the accompanying drawings.

[0019] Figure 1 It is a perspective view of electrical equipment 100, which may be a contactor device, a fuse device, a pyrotechnic fuse or the like.

[0020] More specifically, Figure 1 The illustrated electrical device 100 includes an arc-extinguishing chamber assembly 102 and a switch assembly 104. In an example orientation, the switch assembly 104 is attached to the top or upper surface of the arc-extinguishing chamber assembly 102. In this example, the switch assembly 104 may include components that perform one or more fuse functions. For example, those discussed below... Figure 4A and Figure 4B Details of an example embodiment in which the electrical device 100 is implemented as a fuse are shown. In other examples, the switch assembly 104 may also, or alternatively, include components that perform one or more contactor functions. For example, those discussed below... Figure 5A and Figure 5B Details of an example embodiment in which electrical device 100 is implemented as a contactor are shown. Although not shown herein, arc-extinguishing chamber assembly 102 may be further configured for coupling to a drive or actuation component, such as a coil or other actuator that facilitates movement of components of switching assembly 104, as when electrical device 100 is a contactor, as further detailed below.

[0021] like Figure 1 As shown, the switch assembly 104 typically includes a body or housing 106. This will be further described below, particularly with reference to the following description. Figures 4A to 5B To elaborate further, the switch assembly 104 may include a number of features or components disposed within the housing 106. Figure 1 The switch assembly shown may include two fixed contacts 108. Fixed contacts 108 are configured to electrically connect internal components of electrical device 100 (described further below) to an external circuit, such as to an electrical system or device. For example, fixed contacts 108 may be terminals configured to facilitate connection of a first electrical lead (not shown) from a voltage source to a second electrical lead (also not shown) of a load to be powered by the voltage source. For example, the first lead may be electrically coupled to one of the fixed contacts 108, while the second lead may be electrically coupled to the other of the fixed contacts 108. Switch assembly 104 may include a moving contact that selectively electrically couples or decouples the two fixed contacts 108. Switch assembly 104 may include components that facilitate selectively opening or closing the electrical device.

[0022] The housing 106 may comprise any suitable material capable of supporting the structure and function of the switching assembly 104. For example, the housing 106 is shown as a substantially rectangular hull sized to hold two fixed contacts 108 arranged side-by-side. However, the dimensions, shape, and configuration of the switching assembly 104 are merely illustrative. As mentioned above, the arc-extinguishing chamber assembly 102 can be modular, thus defining the dimensions and / or one or more features of the housing 106 to facilitate connection and / or mating with the arc-extinguishing chamber assembly 102. As mentioned above, because the arc-extinguishing chamber assembly is modular, the arc-extinguishing chamber assembly 102 can be used with multiple switching assemblies. That is, although... Figure 1 Switching assembly 104 is shown, but any number of switching assemblies can be configured to cooperate with arc-extinguishing chamber assembly 102. For example, in Figure 1 In one example, switch assembly 104 is configured as a fuse device, but in other examples, switch assembly 104 may include contactor devices such as pyrotechnic contactor devices, triggers, interruptors and / or the like. Figure 5A and Figure 5B An example contactor incorporating aspects of this disclosure is shown.

[0023] The housing 106 may be formed from one or more components. For example, Figure 1 The housing 106 is shown to include a sidewall 110 and a top 112. In the example, during assembly or manufacturing, two stationary contacts 108 may be coupled to the top 112, which may then be coupled to the sidewall 110. In the illustrated example, a coupler 116 is configured to selectively couple the top 112 to the sidewall 110 and / or the bottom 114 of the housing 106. A second coupler 118 opposite to the coupler 116 may also be present (but is obscured by the stationary contacts 108 in the illustration). In the example, the coupler 116 includes a post 118 having a tab or head 120 configured to interact or engage with a retaining surface 122 on the top 112 of the switch assembly 104. In the example, the end of the post 118 opposite the head 120 may be secured to the bottom 114 of the housing 106. The coupler 116 shown is merely an example and can be configured to position or otherwise configure aspects of the housing 106 relative to each other and / or relative to other features.

[0024] The electrical device 100 also includes features that facilitate operatively connecting the switch assembly 104 to the arc-extinguishing chamber assembly 102. For example, Figure 1A plurality of receptacles 124 formed around the top periphery of the arc-extinguishing chamber assembly 102 are shown. The receptacles 124 are configured to receive mating protrusions 126 extending from the bottom 114 of the housing 106. In this example, the receptacles 124 may be slightly deformable, for example, to facilitate a snap-fit ​​engagement of the switch assembly 104 via the protrusions 126. Of course, this coupling arrangement is merely illustrative. Other fastening means will be understood by those skilled in the art with the aid of this disclosure. For example, a post 118 may be secured to the arc-extinguishing chamber assembly 102.

[0025] The aspects of this disclosure are particularly useful for providing modular solutions, in which aspects of the arc-extinguishing chamber assembly 102 can be configured or reconfigured, for example by changing magnet specifications, cover specifications, material specifications, and / or the like. Specific details of the arc-extinguishing chamber assembly 102 are further described below, including references to... Figure 2 and Figure 3 .

[0026] Figure 2 The various aspects of the arc-extinguishing chamber assembly are shown in more detail. Specifically, Figure 2 This is an exploded perspective view of the arc-extinguishing chamber assembly 102. As shown, the arc-extinguishing chamber assembly 102 typically includes a housing body 202, a first magnet 204, a second magnet 206, a first magnet support 208, a second magnet support 210, and a cover 212. These features will be described in detail herein.

[0027] The housing body 202 is illustrated as a generally polyhedral shape, having a first end wall 214 and an opposing second end wall 216 (in Figure 2 (Generally obscured in the view). The housing body 202 also includes a first sidewall 218 and a second sidewall 220 extending between the first endwalls 214, 216 (in Figure 2 (The middle is obscured). End walls 214, 216 and side walls 218, 220 generally define the sides of the arc-extinguishing chamber volume 222. Although Figure 2 Examples include end walls 214, 216 and side walls 218, 220, but the housing body is not limited to the shape or construction shown in the figures. In other examples, the housing body may have more or fewer walls, one or more walls may be arcuate, and / or similar. Any construction that allows the housing body 202 to define the arc-extinguishing chamber volume 222 may be used. The arc-extinguishing chamber volume 222 is the volume within the arc-extinguishing chamber assembly 102, configured to contain, suppress, and / or otherwise mitigate events associated with arcing or overcurrent.

[0028] like Figure 2 As also shown, the housing body 202 also has an upper surface 224. (See diagram for reference.) Figure 1As shown, the switch assembly 104 is configured to be placed on the upper surface 224. As also shown, a shaped protrusion 226 may be provided on the upper surface 224. In some examples, the shaped protrusion 226 may be integrated into the upper surface 224 or may be provided as a separate component, such as a washer. The shaped protrusion 226 extends around an opening in the upper surface 224 leading to the arc-extinguishing chamber volume 222. When the shaped protrusion is a washer, a channel may be provided in the upper surface 224 to receive or accommodate a portion of the washer. In operation, when the switch assembly 104 is attached to the arc-extinguishing chamber assembly 102, the shaped protrusion 226 may form a seal between the two assemblies, for example, such that the volume inside the switch assembly 104 is connected to the arc-extinguishing chamber volume 222, but is sealed relative to the surrounding environment. Furthermore, the shaped protrusion 226 may be configured to be received in a corresponding channel formed in the bottom surface of the switch assembly 104, for example, to facilitate alignment of the arc-extinguishing chamber assembly 102 relative to the switch assembly 104.

[0029] A first magnet 204 is configured to be coupled to the outer side of a first end wall 214 of the housing body 202, and a second magnet 206 is configured to be coupled to the outer side of a second end wall 216 of the housing body 202. In the example, magnets 204 and 206 may be arranged opposite each other, for example, at opposite ends of a conductive member, and / or may be otherwise positioned to promote arc elongation during a short-circuit event. Although magnets 204 and 206 are illustrated as being arranged on end walls 214 and 216, in other examples, the magnets may instead be arranged on or additionally on the first side wall 218 and the second side wall 220.

[0030] In an example of this disclosure, the housing body 202 includes a magnet positioning feature 228 formed as a protrusion extending from the first end wall 214. Although the second end wall 216... Figure 2 While not visible in the center, the second end wall 216 may include one or more instances of the magnet positioning feature 228. The magnet positioning feature 228 defines a planar (top) surface 230 extending generally perpendicular to the end wall 214. The magnet positioning feature 228 may also include a tab 232 located at one end of the planar surface 230. The tab 232 extends generally perpendicular to both the end wall 214 and the planar surface 230. Therefore, the magnet positioning feature 228 may be generally L-shaped.

[0031] During assembly, the bottom or lower edge 234 of the first magnet 204 can be supported on the planar surface 230, for example, in the vertical dimension (in Figure 2In the orientation of the first magnet 204, the first magnet 204 is positioned relative to the housing body 202. Furthermore, the side or side edge 236 of the first magnet 204 may contact the tab 232, for example, to position the first magnet 204 relative to the housing body 202 in the horizontal dimension. The back of the magnet 204 may then abut the end wall 214, thereby positioning the first magnet 204 in three dimensions. In the example just described, the corner defined by the lower edge 234 and the side edge 236 is arranged in the angle formed by the surface 230 and the tab 232. Although in Figure 2 While not visible in the center, similar magnet positioning features 228 may be located near the upper surface 224 of the housing body 202. For example, when the magnet is generally rectangular (as in the illustrated example), it may be desirable to have instances of magnet positioning features 228 at more than one corner, such as at opposite corners, at all four corners, or the like.

[0032] In another example, the first magnet 204 may include a notch 238 formed in the lower edge 234. For example, the notch 238 may be sized to accommodate the tab 232 therein, for example, by clearance fit, interference fit, or the like. It will be understood that the use of the notch 238 allows for better positioning of the first magnet 204 in the horizontal dimension.

[0033] The illustrated magnet positioning feature 228 is merely an example. In other examples, other protrusions, surfaces, and / or features may be provided to position magnets 204, 206 on the housing body 202. In another non-limiting example, magnet positioning feature 228 may include multiple planar surfaces (such as planar surface 230) that define the position of the lower edge 234, one or two side surfaces, and / or the top edge of magnet 204.

[0034] The housing body 202 may also include one or more switch assembly positioning features. For example, Figure 2 Four arcuate tabs 240 extending (upward) from the upper surface 224 are shown. The arcuate tabs can be positioned and sized to accommodate corners of a switching assembly (such as switching assembly 104 discussed above). Furthermore, one or more locating holes 242, which may be threaded holes, are formed in the top surface 224. Non-limitingly, the holes 242 can be configured for connecting a coupler 114.

[0035] The first magnet holder 208 and the second magnet holder 210 are configured to hold magnets 204, 206 on the housing body 202 and / or provide a magnetic circuit. For example, and as illustrated, each magnet holder 208, 210 is generally U-shaped, including a central portion 244 and end portions 246 angled relative to the central portion 244. In the illustrated example, the end portions 246 are generally right-angled relative to the central portion 244. In the example, the end portions 246 are spaced apart to extend outside the magnets 204, 206, for example, to clamp the magnets 204, 206 between the housing body 202 and the associated end portions 246. In the example, the holders 208, 210 may be made of a magnetic material, such that the end portions 246 are magnetically coupled to the magnets 204, 206. For example, the holders 208, 210 may be made of a metallic material, such as a metal plate. In some specific examples, the holders 208, 210 may be made of low-carbon steel to provide a magnetic circuit.

[0036] It is understandable that the magnetic coupling between supports 208 and 210 and magnets 204 and 206 will hold the supports and magnets on the housing body 202. For example... Figure 2 As also shown, the housing body 202 may have one or more bracket positioning features. These bracket positioning features are configured to ensure proper positioning of the bracket relative to the housing body 202. In the illustrated example, the bracket positioning feature includes a support flange 248 formed on a first sidewall 218. During assembly, the bottom edge 250 of the bracket 208 contacts the support flange 248 to vertically position the bracket 208 on the sidewall 218. Although in Figure 2 While the middle section is obscured, the second sidewall 220 may have a similar support flange to similarly position the second bracket 210. It is understood that the support flange 248 is merely one example of a bracket positioning feature. Other features that facilitate bracket positioning will be apparent to those skilled in the art upon receiving this disclosure.

[0037] The cover 212 is configured to attach to the bottom of the housing body 202. For example, and although in Figure 2 While not visible from the center, the housing body 202 may have an opening in its bottom surface. A cover 212 may be received in this opening, for example, to provide the bottom of the arc-extinguishing chamber volume 222. In the illustrated example, the side edge 252 of the cover 212 includes a protrusion 254. The periphery of the cover 212 may be sized and shaped to fit into the opening at the bottom of the housing body 202, and the protrusion 254 may be received in a mating socket or recess formed at the lower edge of the housing body 202. In the example, the cover 212 may be sealed relative to the housing body 202, for example, by a gasket or the like, to seal the arc-extinguishing chamber volume 222.

[0038] Cover 212 is also illustrated to include a plurality of retaining members or snap-fit ​​features 256. Snap-fit ​​features 256 are configured to facilitate holding the moving contact in a position away from the fixed contact 108, for example, to hold the electrical device 100 in the off position. In the illustrated example, each snap-fit ​​feature 256 includes a shaped protrusion 258 extending from cover 212, having a distal end 260 disposed in the travel path of the moving contact (discussed below). Figure 4A and Figure 4B (As better shown in the diagram). The formed protrusion 258 or tab is angled, for example, relative to the travel path (vertical direction in the example), and is resilient. For example, the retaining member is configured to allow the moving contact to travel in one direction, such as in a first (downward) direction, but to prevent or inhibit movement of the moving contact in the opposite direction. In the example, movement of the moving contact caused by contact with the pyrotechnic device or other interruptor is sufficient to cause the moving contact to push the protrusion 258 out of the travel path, for example toward the sidewalls 218, 220, until the moving contact passes the distal end 260 of the snap-fit ​​feature 256. Once the moving contact has passed the snap-fit ​​feature 256, the snap-fit ​​feature 256 is no longer in passive contact. Without the force applied by the moving contact, the snap-fit ​​feature 256 “springs back” to its angled position ( Figure 2 and Figure 4B As shown in the diagram below, the distal end 260 is positioned above (e.g., above) the top surface of the moving contact. Because the distal end 260 of the snap-fit ​​feature 256 is located above the moving contact, (in...) Figure 2 The upward movement of the orientation is prevented by the latching feature 256.

[0039] In a non-limiting example, the cover 212 may be a molded part, such as a molded part made by injection molding of a rigid polymer or similar means. The snap-fit ​​feature 256 is illustrated as being supported on the base of the cover 212.

[0040] Of course, the snap-fit ​​feature 256 is merely an example. Modified and alternative constructions are also envisioned. For example, other constructions could be used that allow the moving contact to move away from the fixed contact 108 and are able to hold the moving contact in that spaced-out position. In a non-limiting example, the snap-fit ​​feature 256 could be replaced by a locating member or a spring-biased member that is biased to a position that prevents the moving contact from moving upward as the moving contact travels a predetermined distance from the fixed contact 116. In another example, one or more posts could extend upward from the cover 212, for example, within the footprint of the moving contact. In this example, the bottom of the moving contact could have a corresponding opening or hole aligned with the post, such that when the moving contact is forced into contact with the post, the post engages with the opening to hold the moving contact. For example, the post could form an interference fit with the opening. In other examples, the post could have an expanded or otherwise deformable profile to generate a force that holds the moving contact away from the fixed contact 108.

[0041] Figure 3 This is a perspective view of the arc-extinguishing chamber assembly 102 in its assembled state. (See image.) Figure 3 As shown, the first magnet support 208 and the second magnet support 210 are positioned on the housing body 202 such that the lower edge 250 is adjacent to or arranged near the support flange 248. Figure 3 As also shown, the housing body 202 also includes a support flange 302 configured to contact or otherwise position the upper edge of the support 208.

[0042] Figure 3 It is also shown that the lower edge of the housing body 202 includes a plurality of tabs 304 configured to mate with protrusions 254 of the cover 212. More specifically, each tab 340 defines a slot or opening 306 configured to receive one of the protrusions 254 therein. The tabs 304 may be configured to bend, for example, such that the cover can be pressed into place, and once in place, the tabs spring back to the illustrated position, with each protrusion 254 seated in the associated opening 306. Figure 3 One of the snap-fit ​​features 256 arranged in the arc-extinguishing chamber volume 222 is also shown.

[0043] Figure 4A and Figure 4B It is along Figure 1 The sectional view taken by section line 4-4 in the figure. Figure 4A and Figure 4B Additional aspects of the electrical equipment 100 are shown, including additional aspects of the switch assembly 104. More specifically, Figure 4A This illustrates aspects of the normal operation of the electrical equipment 100. Figure 4B This indicates a locked or locked-out configuration.

[0044] Figure 4A and Figure 4B The arc-extinguishing chamber volume 222 and the upper portion 402 defined by the housing 106 of the switching assembly are shown.

[0045] The electrical equipment 100 is characterized in the arc-extinguishing chamber volume 222 and / or the upper part 402. For example, Figure 4A and Figure 4B The view shows two fixed contacts 108 coupled to the housing 106. The fixed contacts 108 are arranged to extend through the upper portion 402 and into the arc-extinguishing chamber volume 222. The fixed contacts 108 are configured to electrically connect internal components of the electrical device 100 (described further in detail herein) to external circuitry, such as to an electrical system or electrical equipment. For example, the fixed contacts 108 may be terminals configured to facilitate connection to a voltage source and to a load that will be powered by the voltage source.

[0046] Electrical equipment 100 also includes a moving contact 404. In Figure 4A and Figure 4BIn this example, electrical device 100 may be a normally closed fuse. In this example, the moving contact 404 is typically positioned in a first position that contacts the fixed contact 108 (e.g., Figure 4A (As shown). In the illustrated example, the moving contact 404 is a generally elongated member, in Figure 4A In the first position shown in the figure, both fixed contacts 108 can be contacted simultaneously. Therefore, the moving contact 404 can selectively couple the two fixed contacts 108 to facilitate the flow of current between the fixed contacts 108 and thus through the electrical device 100.

[0047] Electrical device 100 also includes a fuse assembly 406 configured to, in other functions, facilitate selective disconnection of electrical device 100, such as in the event of an overload, surge, or similar event, by facilitating the selective disengagement of a moving contact 404 from contact with a fixed contact 108. In this example, fuse assembly 406 may include a moving contact 404 and / or may be operatively coupled to the moving contact 404.

[0048] exist Figure 4A and Figure 4B In the diagram, the fuse assembly 406 is shown as including a shaft 408, a bias spring 410, a shaft retaining member 412, a trigger spring 414, and a trigger spring retaining member 416.

[0049] In this example, shaft 408 is disposed through moving contact 404, for example through a hole formed in moving contact 404, such that first end 418 (e.g., in Figure 4A The upper end in the orientation) is located in the upper part 402, while the second end 420 (e.g., in) Figure 4A The lower end of the orientation is located in the arc-extinguishing chamber volume 222. As shown in the figure, the shaft 408 also includes a first flange 422 near the longitudinal middle portion of the shaft 408 and a second flange 424 near the second end 420.

[0050] A bias spring 410 is located between the second flange 424 and the bottom surface of the moving contact 404 to bias the moving contact 404 away from the second end 418 of the shaft 408. When the shaft 408 is held... Figure 4A When in the position shown, the bias spring 410 biases the moving contact 404 against the fixed contact 108.

[0051] Shaft retaining member 412 selectively retains shaft 408 Figure 4A The location is shown. In the example shown, shaft 408 includes a reduced diameter portion or recess 426 near the first end 418 of shaft 408. Shaft retaining member 412 includes a slot or opening configured to mate with recess 426 to selectively prevent (or allow) axial movement of shaft 408, as further detailed herein. Figure 4AIn the example, a portion of the shaft retaining member 412 is held in the groove 426 to act as a stop, preventing downward movement of the shaft 408 (e.g., due to gravity and / or the force exerted by the trigger spring 414, discussed below). Figure 4A In this example, the length of the shaft is generally accommodated in a shaft housing 428 disposed in the upper part 402. In this example, the shaft housing 428 forms a clearance fit with the shaft 408, but restricts the lateral movement of the shaft 408, for example, to constrain the movement of the shaft 408 generally to the direction of the axis of the shaft 408.

[0052] A trigger spring 414 is positioned to apply a downward force to the shaft 408. In the illustrated example, the trigger spring 414 is a compression spring disposed around the shaft 408. A first (top) end of the trigger spring 414 contacts a fixed surface or feature of the upper portion 402. A second (bottom) end of the trigger spring 414 contacts a trigger spring retaining member 416. In the example, the trigger spring retaining member 416 includes a cup-shaped member disposed on the shaft 408. Specifically, the bottom of the trigger spring retaining member 416 includes a hole through which the shaft 408 passes. The diameter of this hole is larger than the diameter of the shaft 408, but smaller than the diameter or other external dimensions of the first flange 422 of the shaft 408. Thus, the bottom of the trigger spring retaining member 416 rests on or otherwise contacts the top of the first flange 422, while the trigger spring 414 applies a biasing force, pressing the bottom of the trigger spring retaining member 416 against the first flange 422.

[0053] exist Figure 4A In this arrangement, the shaft retaining member 412 cooperates with the shaft 408 to resist the biasing force of the trigger spring 414. Also in this position, the biasing spring 410 biases the moving contact 404 into contact with the fixed contact 108. In this configuration, current flows between the fixed contacts 108 via the moving contact 404.

[0054] Figure 4B A trigger or disconnect configuration is shown, which is generated by the disengagement of the shaft retaining member 412 from the shaft 408. More specifically, in response to a triggering event (such as a power surge, overcurrent event, or similar event), the shaft retaining member 412 can be moved, damaged, or otherwise reconfigured to no longer inhibit axial movement of the shaft 408. When the shaft retaining member no longer inhibits such movement, the biasing force of the trigger spring 414 forces the shaft 408 downward, thereby forcing the moving contact 404 away from the fixed contact 108, disconnecting the electrical equipment, and preventing current from flowing between the fixed contacts 108.

[0055] Figure 4A and Figure 4B Two snap-fit ​​features 256 are also shown. (e.g.) Figure 4AAs shown, during normal operation of the electrical device 100, the moving contact 404 is generally positioned above the snap-fit ​​feature. However, if the moving contact 404 is driven away from the fixed contact, for example by the trigger spring 414, the moving contact 404 will cause the protrusion 258 to bend, for example, outward, as discussed above. Continued downward movement will advance the moving contact 404 below the distal end 260 of the snap-fit ​​feature 256. Once past the distal end 260, the protrusion 258 will return to its unbent state, and the distal end 260 will be positioned above the moving contact 404, as... Figure 4B As shown. When the distal end 260 is above the moving contact, the moving contact 404 is prevented from moving upward, for example, from contacting the fixed contact 108. Therefore, the latching feature 256 keeps the electrical device 100 in the off state.

[0056] As discussed above, the arc-extinguishing chamber assembly 102 can be a modular assembly that can be used in any number of switch assemblies 104 with different characteristics, components, or the like. For example, the fuse assembly 406 can be replaced or supplemented with one or more additional components that otherwise facilitate the reconfiguration of the electrical device 100 from a closed state to an open state.

[0057] Furthermore, although electrical equipment 100 is shown as a fuse-type device, aspects of this disclosure can also be applied to other types of electrical equipment. For example, Figure 5A and Figure 5B These are cross-sectional views of aspects of this disclosure used in contactor-type devices, which generally correspond to Figure 4A and Figure 4B The view. For example, Figure 5A The normal operation of electrical equipment 100 is shown, while Figure 5B The locked or locked-out configuration is shown.

[0058] The electrical equipment 100 is characterized in the arc-extinguishing chamber volume 222 and / or the upper volume 502. For example, Figure 5A and Figure 5B The view shows two fixed contacts 108 coupled to the housing 106. The fixed contacts 108 are partially disposed in the upper volume 502 and configured to electrically connect internal components of the electrical device 100 (described further in detail herein) to external circuitry, such as to an electrical system or device. For example, the fixed contacts 108 may be terminals configured to facilitate connection to a voltage source and to a load to be powered by the voltage source.

[0059] The electrical device 100 also includes a moving contact 504. The moving contact 504 can be in a first position spaced apart from the fixed contact 108 (in... Figure 5A (shown in solid line) and the second position of the contact fixed contact 108 (in Figure 5AThe movable contact 504 can move between the first position (shown as a dashed line). Specifically, the movable contact 504 can move upward from the first position (in the...). Figure 5A The moving contact 504 is moved to the second position (oriented upwards). In the example shown, the moving contact 504 is a generally elongated member that can simultaneously contact both fixed contacts 108 in the second position, as shown by the dashed line. Therefore, the moving contact 504 can selectively couple the two fixed contacts 108 to facilitate current flow between the fixed contacts 108, thereby flowing through the electrical device 100.

[0060] The electrical device 100 also includes an actuation component 506 configured to, in other functions, facilitate the selective opening and closing of the electrical device 100 by promoting the selective movement of a moving contact 504 into and out of contact with a fixed contact 108. In the example, the actuation component 506 may include the moving contact 504 and / or may be operatively coupled to the moving contact 504.

[0061] exist Figure 5A and Figure 5B In the figure, the actuation assembly 506 is shown as including a shaft 508 and a coupler 510.

[0062] In this example, shaft 508 is configured such that the first end (e.g., in) Figure 1 The upper end of the shaft 508 is located in the arc-extinguishing chamber volume 222. The first end is coupled to the moving contact 504, for example, via a coupler 510. The opposite (second) end of the shaft 508 is not shown in the figure. In the example, the shaft may extend through the cover 212. In the example, although not shown, the opposite (bottom) end of the shaft 508 may be coupled to the plunger.

[0063] exist Figure 5A and Figure 5B In the example, coupler 510 includes a base 512 and an extension extending upward from the base 512 (in... Figure 5A The spaced-apart sides 514 extend in the orientation of the coupler 510. In this example, the spaced-apart sides 514 define an opening through which a portion of the moving contact 504 passes. Specifically, the moving contact 504 is a generally elongated or strip-shaped member extending from a first end near the first end wall 214 to a second end. The moving contact 504 passes through the opening in the spaced-apart sides 514 such that the first end and the second end are positioned on opposite sides of the spaced-apart sides 514 of the coupler 510 (and are generally vertically aligned with the fixed contact 108).

[0064] In the illustrated example, the base 512 of the coupler 510 is attached to the upper end of the shaft 508. In this example, the base 512 may be molded onto the shaft 508. For example, the base 512 may be a polymer material formed on the shaft 508 by an overmolding process or similar method. In this example, the polymer material may be configured to partially electrically isolate the moving contact 504 from the remaining actuator components (e.g., the shaft 508) and / or the housing.

[0065] In the illustrated example, the side portion 514 of the coupler 510 may be integrated with the base portion 512. For example, the base portion 512 may be overmolded onto the bottom portion of the side portion 514. However, in other examples, the side portion 514 may be coupled, secured, or attached to the base portion 512 in other ways. In the illustrated example, the side portion 514 may approximate an inverted U-shape to define an opening providing a clearance at the end of the moving contact 504, as described above. The moving contact 504 can move relative to the side portion 514 and the base portion 512 within the opening.

[0066] exist Figure 5A and Figure 5B In the example shown, a bias spring 516 is disposed between the base 512 and the moving contact 504. More specifically, the bias spring 516 biases the moving contact 504 away from the shaft 508 and against the top edge of the opening in the side portion 514. Thus, in the illustrated example, the shaft 508 is fixed to the coupler 510 (e.g., fixed to the base 512 of the coupler 510), while the bias spring 516 biases the moving contact 504 against the top edge of the opening in the side portion 514 of the coupler 510. Therefore, movement of the shaft 508 (e.g., along the axial direction of the shaft 508) will cause corresponding movement of the coupler 510, the bias spring 516, and the moving contact 504. For example, when the shaft 508 is in Figure 5A When the orientation of the shaft is caused to move downward, the moving contact 504 moves away from the fixed contact 108. Alternatively, when the shaft 508 is in Figure 5A When the orientation of the shaft is caused to move upward, the moving contact 504 is moved towards the fixed contact 108 and eventually makes contact with it. When the moving contact 504 contacts the fixed contact 108, the shaft 508... Figure 5A Continuing to move the shaft 508 upwards can cause the coupler 510 to continue moving relative to the moving contact 504, for example, due to the compression of the bias spring 516. In this example, the bias spring 516 can compensate for excessive travel of the shaft 508, for example, to prevent destructive contact between the moving contact 504 and the fixed contact 108. In other examples, the bias spring 516 may not be included.

[0067] Figure 5A and Figure 5B Two snap-fit ​​features 256 are also shown. (e.g.) Figure 5AAs shown, during normal operation, such as during the normal opening and closing of electrical equipment 100, the moving contact 504 is generally positioned above the snap-fit ​​feature. However, if the moving contact 504 is driven away from the fixed contact, for example by a pyrotechnic element (not shown), the moving contact 504 will cause the protrusion 258 to bend, for example, outward, as discussed above. Continued downward movement will advance the moving contact 504 below the distal end 260 of the snap-fit ​​feature 256. Once past the distal end 260, the protrusion 258 will return to its unbent state, and the distal end 260 will be positioned above the moving contact 504, as... Figure 5B As shown. When the distal end 260 is above the moving contact, the moving contact 504 is prevented from moving upward, for example, from contacting the fixed contact 108. Therefore, the latching feature 256 keeps the electrical device 100 in the off state.

[0068] Despite Figure 5A and Figure 5B Not shown, but the electrical device 100 (specifically, the actuation assembly 506) may include one or more additional components to move the shaft 508 as just described. For example, the actuation assembly 506 may include a plunger disposed at the lower end of the shaft 508. This plunger may be driven by a coil (e.g., a DC coil). This coil may be selectively energized.

[0069] As mentioned above, Figure 5A and Figure 5B The examples provided are merely illustrative. Modifications to the switching assembly 104 are contemplated. For example, the switching assembly may be a normally open switching device, such that the moving contact 504 is biased away from the fixed contact 108 by the actuating assembly 506. Aspects of this disclosure may also be applied to other configurations, including normally closed switching device arrangements. In a normally closed arrangement, the actuating assembly 506 may bias the moving contact toward the fixed contact 108.

[0070] As discussed above, the arc-extinguishing chamber assembly 102 can be a modular assembly that can be used with any number of switching assemblies 104 having different characteristics, components, or the like. The arc-extinguishing chamber assembly 102 can also be configured according to the application. For example, when the electrical device 100 is intended for high-power applications, the magnets 204, 206 can be relatively robust rare-earth magnets, such as neodymium magnets. Similarly, in higher-power applications, the housing body 202 and / or cover 212 can be made of an insulating material such as a reinforced polymer. In some examples, the housing body 202 and / or cover 212 can be made of a glass fiber reinforced polymer.

[0071] In other applications (e.g., lower power), the magnets can be smaller and / or made of less expensive permanent magnet materials. Similarly, in lower power applications, the polymers used for the housing body 202 and / or cover 212 can be less insulating and / or less expensive polymers. Not limited to this, the housing body 202 and / or cover 212 may not include reinforcing polymers. In this example, the modularity of this disclosure can enable more efficient assembly by allowing functional testing and / or assembly to be performed in parallel and / or as an offline process.

[0072] Although the present technology has been described with respect to preferred embodiments, those skilled in the art will readily understand that various changes and / or modifications can be made to the present technology without departing from its spirit or scope. For example, each claim may be referenced in multiple dependent manners from any or all of the claims, even if such manner was not originally claimed.

Claims

1. An arc-extinguishing chamber assembly, comprising: The housing body has a first end wall and an opposing second end wall, as well as a first side wall and an opposing second side wall, the housing body defining the volume of the arc-extinguishing chamber; The first magnet is located on the outer surface of the first end wall of the housing body; The second magnet is located on the outer surface of the second end wall of the housing body. The first support contacts the outer surface of the first magnet and the outer surface of the second magnet, and extends substantially along the first sidewall; as well as The second support contacts the outer surface of the first magnet and the outer surface of the second magnet, and extends substantially along the second sidewall.

2. The arc-extinguishing chamber assembly according to claim 1, wherein, At least one of the first or second brackets is generally C-shaped, having a first end and a second end angled relative to a central portion, the first end being configured to contact the outer surface of the first magnet, the second end being configured to contact the outer surface of the second magnet, and the central portion extending generally along the first or second sidewall.

3. The arc-extinguishing chamber assembly according to claim 2, wherein, At least one of the first support or the second support is magnetically coupled to the first magnet at the first end and to the second magnet at the second end.

4. The arc-extinguishing chamber assembly according to any one of claims 1 to 3, further comprising: A cover is coupled to the housing body to block the opening leading to the arc-extinguishing chamber volume.

5. The arc-extinguishing chamber assembly according to claim 4, wherein, The cover includes one or more snap-fit ​​features extending into the volume of the arc-extinguishing chamber, the one or more snap-fit ​​features including flexible protrusions that at least partially extend into the volume of the arc-extinguishing chamber.

6. The arc-extinguishing chamber assembly according to claim 1, wherein, The first end wall includes at least one magnet alignment feature extending from the first end wall in a direction away from the volume of the arc-extinguishing chamber, the at least one alignment feature being configured to position the first magnet adjacent to the first end wall.

7. The arc-extinguishing chamber assembly according to claim 1, wherein, The first sidewall includes a support flange configured to contact the edge of the first bracket.

8. The arc-extinguishing chamber assembly according to claim 1, wherein, The shell body is a polymer shell body.

9. The arc-extinguishing chamber assembly according to claim 8, wherein, The polymer shell body is reinforced with glass fiber.

10. The arc-extinguishing chamber assembly according to claim 4, wherein, The cap is a polymer cap.

11. The arc-extinguishing chamber assembly according to any one of claims 1, wherein, At least one of the first magnet or the second magnet is a neodymium magnet.

12. An electrical device comprising: The arc-extinguishing chamber assembly according to any one of claims 1 to 11; as well as A switching assembly, coupled to the arc-extinguishing chamber housing, the switching assembly comprising: A switch assembly housing, a housing body sealed to the arc-extinguishing chamber housing, the switch assembly housing defining a second volume in communication with the arc-extinguishing chamber volume; One or more fixed contacts are at least partially disposed within the arc-extinguishing chamber volume or the second volume; and A movable contact is disposed at least partially in the volume of the arc-extinguishing chamber and configured to move relative to the fixed contact between a first position and a second position, wherein in the first position the movable contact contacts the one or more fixed contacts, and in the second position the movable contact is spaced apart from the one or more fixed contacts.

13. The electrical equipment according to claim 12, wherein: The arc-extinguishing chamber assembly includes the cover and the one or more snap-fit ​​features; and The one or more latching features hold the moving contact in the second position.

14. The electrical equipment according to claim 12, wherein: The housing body of the arc-extinguishing chamber assembly further includes positioning features extending from the upper surface of the housing body; and At least a portion of the switch assembly housing contacts the positioning feature to position the switch assembly relative to the switch assembly.

15. The electrical equipment of claim 14, further comprising a shaped protrusion disposed between the housing body of the arc-extinguishing chamber assembly and the switch assembly housing to seal the housing body relative to the switch assembly housing.

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