A changeover switch single pole module

Abstract

The utility model relates to low voltage electric appliance technical field, a kind of change-over switch single pole module, comprising: shell assembly;Movable contact piece assembly, it is located at the inside center of shell assembly, movable contact piece assembly includes contact support, contact support is rotatably connected with shell assembly, the top of contact support is equipped with movable contact piece, and the both ends of movable contact piece are located at the both sides of contact support respectively;Two static contact piece assemblies, respectively located at the both sides of movable contact piece assembly, and structure mirror image symmetry, static contact piece assembly is fixedly connected with shell assembly, and static contact piece assembly includes first static contact piece, and first static contact piece is located below the end of movable contact piece, and there is gap between the end of movable contact piece, and the below of first static contact piece is equipped with spring. Movable contact piece and static contact piece contact after, spring can be compressed, when contact support reversely rotates, spring elongates and makes movable contact piece change position quickly, speed up the switching speed of the utility model.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical technology, specifically to a single-pole module for a changeover switch. Background Technology

[0002] The main function of a transfer switch is to automatically switch to a backup power source when the main power supply fails, ensuring the continuity and reliability of power supply. Common types include contactor-derived automatic transfer switches, circuit breaker-derived automatic transfer switches, motor-driven automatic transfer switches, integrated automatic transfer switches, static transfer switches, and modular automatic transfer switches. A problem with existing technologies is the slow switching speed during the transfer process. Utility Model Content

[0003] The purpose of this invention is to provide a single-pole module for a changeover switch. After the moving contact piece comes into contact with the stationary contact piece, it can compress the spring. When the contact support rotates in the opposite direction, the spring extends and causes the moving contact piece to change position quickly, thereby accelerating the switching speed of this invention.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a single-pole module for a changeover switch, comprising: a housing assembly; a moving contact assembly disposed at the center of the housing assembly, the moving contact assembly including a contact support member rotatably connected to the housing assembly, the top of the contact support member having a moving contact piece, the two ends of the moving contact piece being located on both sides of the contact support member; and two stationary contact assemblies disposed on both sides of the moving contact assembly, with a mirror-symmetrical structure, the stationary contact assemblies being fixedly connected to the housing assembly, the stationary contact assembly including a first stationary contact piece, the first stationary contact piece being located below the end of the moving contact piece and having a gap between the first stationary contact piece and the end of the moving contact piece, and a spring being disposed below the first stationary contact piece.

[0005] Preferably, it also includes an arc-extinguishing assembly, of which there are two, respectively disposed on both sides of the moving contact piece assembly. The arc-extinguishing assembly is fixedly connected to the housing assembly, and the stationary contact piece assembly is disposed between the moving contact piece assembly and the arc-extinguishing assembly.

[0006] Preferably, the arc extinguishing assembly includes: two arc extinguishing covers; and a plurality of arc extinguishing grids, each disposed between the two arc extinguishing covers. The plurality of arc extinguishing grids are divided into two groups, located at both ends of the arc extinguishing covers respectively, and the arc extinguishing grids are fixedly connected to the arc extinguishing covers.

[0007] Preferably, the arc-extinguishing grids are distributed at equal intervals, and two adjacent arc-extinguishing grids are symmetrical. Each arc-extinguishing grid has a notch at one end near the middle of the arc-extinguishing cover. The notch is triangular, and the length of the arc-extinguishing grid is less than half the length of the arc-extinguishing cover.

[0008] Preferably, the moving contact assembly further includes: a first arc-inducing angle, disposed above the moving contact and with a gap between them, wherein both ends of the first arc-inducing angle are provided with first bends, the distance between the first bends and the arc-extinguishing shield is less than the distance between the first bends and the moving contact, and the height of the lowest point of the first bend is lower than the height of the top surface of the arc-extinguishing shield; and a second stationary contact, fixedly disposed at the top of the first arc-inducing angle, wherein the second stationary contact and the moving contact are connected by a first flexible connecting wire.

[0009] Preferably, the housing assembly includes a first housing and a second housing, the first housing and the second housing are detachably connected, and the second housing is provided with terminals at the top and the edges on both sides.

[0010] Preferably, the stationary contact assembly further includes: a second arc-starting angle, the second arc-starting angle having a second bend, the second bend being located near the arc-extinguishing shield, the distance between the second bend and the arc-extinguishing shield being less than the distance between the second bend and the moving contact, the height of the highest point of the second bend being higher than the height of the bottom surface of the arc-extinguishing shield, the first stationary contact being located near the contact support member on the side of the second bend; and a third stationary contact being located below the first stationary contact, the third stationary contact being connected to the first stationary contact via a second flexible connecting wire, the bottom surface of the third stationary contact being flush with the bottom surface of the second arc-starting angle.

[0011] Preferably, the second bending portion is provided with a first through hole, and the first end of the first stationary contact piece and the middle portion of the third stationary contact piece are both provided in the first through hole; the second arc-leading angle is also provided with a third bending portion, the third bending portion is provided on the side close to the contact support, the third bending portion is provided with a second through hole, the second end of the first stationary contact piece is provided with a first protrusion, the first protrusion is slidably disposed in the second through hole; the middle portion of the third stationary contact piece is provided with a clearance hole, the bottom surface of the first stationary contact piece is provided with a receiving groove, the top surface of the second arc-leading angle is provided with a second protrusion, the first end of the spring is sleeved on the second protrusion, the second end of the spring passes through the clearance hole and extends into the receiving groove, and the second end of the spring abuts against the inner top surface of the receiving groove.

[0012] The beneficial effects of using this utility model are:

[0013] In use, when the moving contact piece contacts the stationary contact piece, it compresses the spring. When the contact support rotates in the opposite direction, the spring extends, causing the moving contact piece to quickly change position, thus accelerating the switching speed of this invention. This invention improves the arc-breaking capability through a multi-grid arc-extinguishing chamber, and the built-in quick-connect terminal block makes connecting wires simple and safe. Attached Figure Description

[0014] Figure 1 This is an exploded isometric view of the present invention.

[0015] Figure 2 This is an isometric view of the moving contact piece assembly in this utility model;

[0016] Figure 3 This is an isometric view of the static contact piece assembly in this utility model;

[0017] Figure 4 This is an isometric view of the arc-extinguishing component in this utility model;

[0018] Figure 5 A schematic diagram of the main structure of this utility model when the moving contact piece is in contact with the first stationary contact piece on the right side;

[0019] Figure 6 for Figure 5 Enlarged view of point A in the middle;

[0020] Figure 7 A schematic diagram of the main structure of this utility model when the moving contact piece is in contact with the first stationary contact piece on the left;

[0021] Figure 8 This is an isometric view of multiple components of this utility model combined together.

[0022] The reference numerals in the figures include:

[0023] 1-Housing assembly, 11-First housing, 12-Second housing, 13-Terminal, 2-Moving contact assembly, 21-Contact support, 22-Moving contact, 23-First arc-starting angle, 231-First bend, 24-Second stationary contact, 25-First flexible connecting wire, 3-Stationary contact assembly, 31-First stationary contact, 311-First protrusion, 312-Receiving groove, 32-Spring, 33-Second arc-starting angle, 331-Second bend, 3311-First through hole, 332-Third bend, 3321-Second through hole, 333-Second protrusion, 34-Third stationary contact, 341-Allowing hole, 35-Second flexible connecting wire, 4-Arc extinguishing assembly, 41-Arc extinguishing cover, 42-Arc extinguishing grid, 43-Notch. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this technical solution clearer, the following detailed description, in conjunction with specific embodiments, further illustrates this technical solution. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this technical solution.

[0025] Please see Figure 1-8 This utility model provides a technical solution: a single-pole module for a changeover switch, comprising a housing assembly 1, a moving contact assembly 2, and two stationary contact assemblies 3, with the two stationary contact assemblies 3 respectively disposed on both sides of the moving contact assembly 2. The moving contact assembly 2 includes a contact support 21 and a moving contact 22, and the stationary contact assembly 3 includes a first stationary contact 31 and a spring 32. The contact support 21 is rotatably connected to the housing assembly 1. When the contact support 21 rotates, the moving contact 22 can rotate with the contact support 21, and the two ends of the moving contact 22 correspond to the positions of the first stationary contact 31 on both sides.

[0026] Please see Figure 1-3 and Figure 5-7 When a rotational external force acts on the square through hole of the contact support 21, causing the moving contact piece 22 to contact the first stationary contact piece 31 on either side, the moving contact piece 22 forms a passage with the first stationary contact piece 31 on that side, while being disconnected from the first stationary contact piece 31 on the other side. At this time, on the side where the passage is formed, the moving contact piece 22 applies downward pressure to the first stationary contact piece 31, and the first stationary contact piece 31 applies downward pressure to the top of the spring 32. The spring 32 is compressed and stores elastic potential energy. Due to the opposing force of the reaction spring, the connection capability is enhanced, and the energizing performance is stable. When the external force controls the contact support 21 to rotate in the opposite direction, the spring 32 of the energized path releases its elastic potential energy and extends, and transmits the elastic force to the moving contact piece 22 through the first stationary contact piece 31, causing it to quickly change position and rapidly move away from its original position to rotate in the opposite direction, thus accelerating the switching speed of this invention.

[0027] This invention features excellent insulation performance, a modular structure allowing for flexible multi-pole combinations, a compact design, and simple assembly. It utilizes a double-break moving contact for synchronous and rapid opening and closing, ensuring that one circuit closes while the other is opened within the effective timeframe. Opening and closing indicators are located on the exterior of the casing, allowing for easy identification of the switch's operating position. When a fault or abnormality occurs in a pole, the faulty pole can be removed for convenient inspection, maintenance, and replacement. This invention also boasts advantages such as small size and low cost.

[0028] Please see Figure 1-7This invention also includes two arc-extinguishing components 4, which are capable of absorbing and extinguishing electric arcs. Each arc-extinguishing component 4 includes two arc-extinguishing covers 41 and several arc-extinguishing grids 42. Adjacent arc-extinguishing grids 42 are symmetrically arranged, and each grid 42 has a notch 43 at one end near the center of the arc-extinguishing cover 41. The staggered arrangement of several arc-extinguishing grids 42 rapidly divides a long electric arc into several smaller arc segments, absorbing and extinguishing them by cooling, greatly improving its breaking capacity and enhancing the product's versatility.

[0029] Please see Figure 1-8 The moving contact piece 22 assembly 2 also includes a first arc-leading angle 23 and a second stationary contact piece 24, which is connected to the moving contact piece 22 via a first flexible connecting wire 25. The housing assembly 1 includes a first housing 11 and a second housing 12, with several terminals 13 provided on the second housing 12. The stationary contact piece assembly 3 also includes a second arc-leading angle 33 and a third stationary contact piece 34, which is connected to the first stationary contact piece 31 via a second flexible connecting wire 35. This utility model uses an embedded terminal block 13, making the connection of external wires safer and more convenient. When users have multi-pole requirements, the same single-pole modules can be added and combined left and right to achieve multi-pole functionality, saving mold costs and improving production and assembly efficiency.

[0030] Please see Figure 1-8 Both ends of the first arc-starting angle 23 are provided with a first bending portion 231, and the second arc-starting angle 33 is provided with a second bending portion 331. When the moving contact piece 22 separates from the first stationary contact piece 31, because the opening distance between the moving and stationary contacts is relatively long, the electric arc between the breaking contacts surges towards the arc-extinguishing assembly 4 under the combined action of the first bending portion 231 and the second bending portion 331, and several arc-extinguishing grid plates 42 absorb and extinguish the electric arc.

[0031] Please see Figure 1-8 During assembly, the moving contact piece assembly 2 is first placed into the rectangular groove above the contact support 21. Cylindrical pins are then passed through the circular holes in both the contact support 21 and the moving contact piece 22 to form a single unit. The first arc-leading angle 23, the conductor, and the second stationary contact piece 24 are then fastened together with rivets. The first flexible connecting wire 25 is then welded to form a single unit from the two components.

[0032] Please see Figure 1-8The second bend 331 has a first through hole 3311, and the second arc-leading angle 33 has a third bend 332, which has a second through hole 3321. The second end of the first stationary contact piece 31 has a first protrusion 311, which is slidably disposed within the second through hole 3321. The third stationary contact piece 34 has a clearance hole 341 in the middle, the bottom surface of the first stationary contact piece 31 has a receiving groove 312, and the top surface of the second arc-leading angle 33 has a second protrusion 333.

[0033] Please see Figure 1-8 During assembly of the stationary contact assembly 3, the second flexible connecting wire 35 connects the end of the first stationary contact 31 furthest from the contact point to the shorter end of the third stationary contact 34 by welding to form a conductor. The unwelded end of the third stationary contact 34 passes through the first through hole 3311 on the front of the second arc-starting angle 33, and its bottom is flush with the bottom of the second arc-starting angle 33. Two first protrusions 311 on both sides of the welded end of the first stationary contact 31 slide through the second through holes 3321 on both sides of the third bend 332 folded up on both sides of one end of the second arc-starting angle 33, and can move up and down in the second through holes 3321 without coming out. One end of the spring 32 is fixed to the second protrusion 333 on the upper surface of the bottom of the second arc-starting angle 33, and the other end is compressed to press it into the receiving groove 312 above the first stationary contact 31 directly above the spring 32. The spring 32 passes through the clearance hole 341 on the third stationary contact 34 and supports the first stationary contact 31 stacked on top of it.

[0034] Please see Figure 1-8 During assembly of the arc-extinguishing assembly 4, one end of an arc-extinguishing grid plate 42 is first inserted into the corresponding row of square holes on the left side of an arc-extinguishing cover 41. The other arc-extinguishing grid plates 42 are then alternately and orderly arranged in the corresponding rows of square holes on the arc-extinguishing cover 41. After installation, the arc-extinguishing grid plates 42 are symmetrically arranged on the arc-extinguishing cover 41. Then, another arc-extinguishing cover 41 is placed on the upper end of the arc-extinguishing grid plate 42 according to the square holes corresponding to the upper end of the arc-extinguishing grid plate 42, and then riveted together to form a whole.

[0035] Please see Figure 1-8 When assembling this utility model as a whole, the moving contact piece assembly 2, two static contact piece assemblies 3, two arc extinguishing assemblies 4 and several terminals 13 are arranged in sequence according to the internal structure of the second housing 12. Each component is observed to be in its correct position. Then, the first housing 11 is fastened together and the first housing 11 and the second housing 12 are tightened with screws to form an independent whole.

[0036] The above content is only a preferred embodiment of this utility model. For those skilled in the art, many changes can be made in the specific implementation and application scope based on the ideas of this technical content. As long as these changes do not depart from the concept of this utility model, they all fall within the protection scope of this patent.

Claims

1. A single-pole module for a changeover switch, characterized in that, include: Housing assembly; A movable contact assembly is disposed at the center inside the housing assembly. The movable contact assembly includes a contact support member, which is rotatably connected to the housing assembly. A movable contact piece is provided on the top of the contact support member, and the two ends of the movable contact piece are respectively located on both sides of the contact support member. Two stationary contact plate assemblies are respectively disposed on both sides of the moving contact plate assembly and are mirror-symmetrical in structure. The stationary contact plate assembly is fixedly connected to the housing assembly. The stationary contact plate assembly includes a first stationary contact plate, which is located below the end of the moving contact plate and has a gap with the end of the moving contact plate. A spring is provided below the first stationary contact plate.

2. The single-pole module of the changeover switch according to claim 1, characterized in that, It also includes an arc-extinguishing assembly, of which there are two, respectively disposed on both sides of the moving contact piece assembly. The arc-extinguishing assembly is fixedly connected to the housing assembly, and the stationary contact piece assembly is disposed between the moving contact piece assembly and the arc-extinguishing assembly.

3. The single-pole module of the changeover switch according to claim 2, characterized in that, The arc-extinguishing component includes: Two arc-extinguishing shields; A plurality of arc-extinguishing grid plates are disposed between the two arc-extinguishing covers. The plurality of arc-extinguishing grid plates are divided into two groups and located at both ends of the arc-extinguishing covers respectively. The arc-extinguishing grid plates are fixedly connected to the arc-extinguishing covers.

4. The single-pole module of the changeover switch according to claim 3, characterized in that, The arc-extinguishing grids are evenly spaced, and two adjacent arc-extinguishing grids are symmetrical. Each arc-extinguishing grid has a notch at one end near the center of the arc-extinguishing cover. The notch is triangular, and the length of the arc-extinguishing grid is less than half the length of the arc-extinguishing cover.

5. The single-pole module of the changeover switch according to claim 3, characterized in that, The moving contact assembly also includes: The first arc-starting angle is located above the moving contact piece and there is a gap between the first arc-starting angle and the moving contact piece. Both ends of the first arc-starting angle are provided with a first bend. The distance between the first bend and the arc-extinguishing cover is less than the distance between the first bend and the moving contact piece. The height of the bottom of the first bend is lower than the height of the top surface of the arc-extinguishing cover. The second static contact piece is fixedly disposed at the top of the first arc-leading angle, and the second static contact piece is connected to the moving contact piece through the first flexible connecting wire.

6. The single-pole module of the changeover switch according to claim 5, characterized in that, The housing assembly includes a first housing and a second housing, which are detachably connected. The second housing has terminals on its top and both sides.

7. The single-pole module of the changeover switch according to claim 3, characterized in that, The stationary contact assembly also includes: The second arc-starting angle has a second bend, which is located near the arc-extinguishing shield. The distance between the second bend and the arc-extinguishing shield is less than the distance between the second bend and the moving contact piece. The height of the top of the second bend is higher than the height of the bottom surface of the arc-extinguishing shield. The first stationary contact piece is located on the side of the second bend near the contact support. The third stationary contact piece is located below the first stationary contact piece. The third stationary contact piece is connected to the first stationary contact piece via a second flexible connecting wire. The bottom surface of the third stationary contact piece is flush with the bottom surface of the second arc-drawing angle.

8. The single-pole module of the changeover switch according to claim 7, characterized in that, The second bent portion is provided with a first through hole, and the first end of the first stationary contact piece and the middle portion of the third stationary contact piece are both located in the first through hole; The second arc-leading angle is also provided with a third bending part, which is located on the side close to the contact support member. The third bending part is provided with a second through hole, and the second end of the first stationary contact piece is provided with a first protrusion, which is slidably disposed in the second through hole. The third stationary contact piece has a clearance hole in the middle, the bottom surface of the first stationary contact piece has a receiving groove, the top surface of the second arc-leading angle has a second protrusion, the first end of the spring is sleeved on the second protrusion, the second end of the spring passes through the clearance hole and extends into the receiving groove, and the second end of the spring abuts against the inner top surface of the receiving groove.

Images