An auxiliary switch

Abstract

This utility model relates to the technical field of circuit switches, specifically to an auxiliary switch. It includes a base, a top cover, and a rotating shaft. Multiple sets of circuit switching devices are installed between the base and the top cover, stacked together. Each circuit switching device includes a rotating wheel, a copper wire connecting piece, a movable contact piece, and a plastic base. The copper wire connecting piece is fixedly mounted on the plastic base and has a wire contact end and a first contact point. The wire contact end is located on the outside of the plastic base, and the first contact point is located on the inside of the plastic base. The movable contact piece is movably mounted on the plastic base and moves linearly. The advantages of this utility model are that it achieves various speed settings at low cost, has fast and precise switching speed, and possesses strong arc extinguishing capabilities, making it suitable for high-current circuits.

Description

Technical Field

[0001] This utility model relates to the technical field of circuit switches, and specifically to an auxiliary switch. Background Technology

[0002] With the increasing integration of existing equipment, auxiliary switches have emerged to facilitate the control of a large number of circuit switches.

[0003] Auxiliary switches are mainly used as opening and closing signal control and interlocking protection contacts in the control circuits of various high-voltage circuit breakers and high-voltage disconnectors. They can also be used as changeover switches and combination switches. They are widely used in the secondary circuits of vacuum circuit breakers, load switches, and spring operating mechanisms such as VS1 (ZN63), ZN12, 3AF, ZN65, FZN25, CT19, CT19, and CTD.

[0004] This auxiliary switch is a rotary type with fully insulated terminals. The contacts are planar sliding contacts; the moving contact consists of two contact pieces with no fixed gap and no contact seat, ensuring consistent contact pressure for each pair of contacts. This product is assembled from modular switch units, allowing for customization of the number of contact sections according to user requirements. The entire switch is small in size, simple in structure, flexible in operation, and safe and reliable.

[0005] However, the auxiliary switch has a relatively low breaking capacity for current liabilities. In high inductance separation liability circuits, it is easy to generate arcs, and the arc burning time is relatively long, making it difficult to extinguish. The contacts on the contacts are severely eroded, and a few arcs may cause the insulation material to be corroded and burned, thus significantly reducing the life of the auxiliary switch. Utility Model Content

[0006] In order to overcome the shortcomings of the prior art, this utility model provides an auxiliary switch.

[0007] The technical solution of this utility model is as follows: it includes a base, a top cover, and a rotating shaft. Multiple sets of circuit switching devices are installed between the base and the top cover. The multiple sets of circuit switching devices are stacked together. Each circuit switching device includes a rotating wheel, a copper wire connecting piece, a movable contact piece, and a plastic base. The copper wire connecting piece is fixedly installed on the plastic base. The copper wire connecting piece is provided with a wire contact end and a first contact point. The wire contact end is located on the outside of the plastic base, and the first contact point is located on the inside of the plastic base. The movable contact piece is movably installed on the plastic base and moves linearly.

[0008] The circuit switching device has a rotating shaft installed in the middle. The rotating shaft passes through each set of circuit switching devices in sequence, and the rotating shaft is matched and fixed with the rotating wheel of each set of circuit switching devices. When the rotating shaft rotates, it drives the rotating wheel of each set of circuit switching devices to rotate. When the rotating wheel rotates, it drives different movable contacts to make linear movements to realize the electrical connection or disconnection between the movable contacts and the wiring copper piece.

[0009] Preferably, the copper wire is electrically connected to the outside, and the plastic base of each circuit switching device is provided with a magnet mounting groove below or above the first contact point, and a magnet is installed in the magnet mounting groove.

[0010] Preferably, in the multiple sets of circuit switching devices, in any two adjacent sets of circuit switching devices, the magnet of the upper set of circuit switching devices is directly above the first contact point of the lower set of circuit switching devices.

[0011] Preferably, the circuit switching device comprises a rotating wheel, a guide block, copper connecting plates, movable contact plates, a spring, and a plastic base. The rotating wheel is rotatably mounted in the middle of the plastic base. The rotating wheel has a protrusion in the radial direction to form a cam. The plastic base has guide grooves on both the left and right sides of the rotating wheel. The bottom of the guide block has a guide protrusion. The guide block is mounted in the guide groove through the guide protrusion and makes linear reciprocating motion. The guide block has a contact plate mounting groove. The movable contact plate is fixedly mounted on the guide block through the contact plate mounting groove. The plastic base has four copper connecting plates installed around its perimeter. Each of the four copper connecting plates has a wire contact end and a first contact point. The wire contact end is located on the outside of the plastic base, and the first contact point is located on the inside of the plastic base.

[0012] The movable contact piece has a second contact point on both sides near the first contact point. A spring is installed between the movable contact piece and the plastic base. Under the action of the spring, the movable contact piece pushes the guide block towards the center of the wheel, so that the guide block contacts the wheel.

[0013] Preferably, when the wheel rotates, the two guide blocks each move in a straight line, thereby achieving electrical connection or disconnection between the second contact point and the first contact point.

[0014] Preferably, the movable contact piece is provided with spring mounting seats on the back of each of the two second contact points, and a spring is installed between the two spring mounting seats of the movable contact piece and the plastic seat.

[0015] Preferably, the wiring copper sheet and the movable contact piece are manufactured using sheet metal stamping technology.

[0016] Preferably, the wiring copper sheet and the movable contact piece are made of uniform purple copper material, and the surfaces of the first contact point and the second contact point are both silver-plated.

[0017] Preferably, the multiple circuit switching devices are installed in a staggered stacked state with the upper and lower sets flipped 180 degrees to each other, so that the upper and lower layers of copper wiring sheets are misaligned. The plastic base is provided with a positioning boss on the top and a positioning groove on the bottom. In two adjacent sets of circuit switching devices, the positioning boss of the lower set of circuit switching devices matches the positioning groove of the upper set of circuit switching devices.

[0018] Preferably, the base has two first hexagon countersunk holes on the side near the circuit switching device, and the top cover has two second hexagon countersunk holes on the side near the circuit switching device. Hexagon bolts are installed on both the first and second hexagon countersunk holes.

[0019] Preferably, an upper cover base is installed between the upper cover and the uppermost set of circuit switching devices. The upper cover base is also provided with an upper cover base positioning groove on the side near the circuit switching device. The upper cover base positioning groove and the positioning boss match and position each other. A wear-resistant sleeve is installed on the end of the rotating shaft located on the upper cover base, and a wear-resistant sleeve is installed on the end of the rotating shaft located on the base.

[0020] Preferably, the wire contact end is provided with a threaded hole, and a slotted screw or a Phillips screw is installed in the threaded hole.

[0021] The advantages of this invention are that it achieves various speeds at low cost, with fast and precise switching speed, and also has a strong arc extinguishing capability, making it suitable for high-current circuits. Attached Figure Description

[0022] Figures 1-2 This is a schematic diagram of the structure of this utility model.

[0023] Figures 3-6 This is an exploded view of the present invention.

[0024] Figure 7 A three-dimensional sectional view of this utility model.

[0025] Figures 8-9 This utility model presents a schematic diagram of the structure of a two-layer circuit switching device.

[0026] Figures 10-11 An exploded view of the two-layer circuit switching device of this utility model.

[0027] Figures 12-13 This utility model provides a schematic diagram of the structure of embodiment 1 of the circuit switching device.

[0028] Figures 14-15 This is a schematic diagram of the structure of Embodiment 2 of the circuit switching device of this utility model.

[0029] Figure 16 This is a schematic diagram of the structure of the plastic base of this utility model.

[0030] Figures 1-16 In the middle, 1. Base, 11. First internal hexagon countersunk hole, 2. Top cover, 21. Second internal hexagon countersunk hole, 3. Rotating shaft, 4. Circuit switching device, 41. Rotating wheel, 411. Protrusion, 42. Guide block, 421. Contact plate mounting groove, 422. Guide protrusion, 43. Wiring copper plate, 431. Wire contact end, 432. First contact contact, 433. Threaded hole, 44. Movable contact plate, 441. Second contact contact, 45. Spring, 451. Spring mounting seat, 46. Plastic seat, 461. Magnet mounting slot, 462. Guide groove, 463. Positioning boss, 464. Positioning groove, 5. Top cover base, 51. Top cover base positioning groove, 6. Magnet, 7. Wear-resistant sleeve. Detailed Implementation

[0031] The embodiments of this utility model will be further described below with reference to the accompanying drawings:

[0032] like Figures 1-16 As shown, this embodiment provides an auxiliary switch, including a base 1, a top cover 2, and a rotating shaft 3. Multiple sets of circuit switching devices 4 are installed between the base 1 and the top cover 2. The multiple sets of circuit switching devices 4 are stacked together. The stacking of the circuit switching devices 4 can realize the simultaneous switching of a large number of circuits in one place. The circuit switching device 4 includes a rotating wheel 41, a wire connecting copper piece 43, a movable contact piece 44, and a plastic base 46. The wire connecting copper piece 43 is fixedly installed on the plastic base 46. The wire connecting copper piece 43 is provided with a wire contact end 431 and a first contact point 432. The wire contact end 431 is located outside the plastic base 46, and the first contact point 432 is located inside the plastic base 46. The movable contact piece 44 is movably installed on the plastic base 46 and the movable contact piece 44 moves linearly.

[0033] The circuit switching device 4 has a rotating shaft 3 installed in the middle. The rotating shaft 3 passes through each group of circuit switching devices 4 in sequence, and the rotating shaft 3 is matched and fixed with the rotating wheel 41 of each group of circuit switching devices 4. When the rotating shaft 3 rotates, it drives the rotating wheel 41 of each group of circuit switching devices 4 to rotate. When the rotating wheel 41 rotates, it drives different movable contact pieces 44 to make linear motion to realize the electrical connection or disconnection between the movable contact pieces 44 and the wiring copper piece 43.

[0034] Preferably, the copper wire 43 is electrically connected to the outside, and the plastic base 46 of each circuit switching device 4 is provided with a magnet mounting groove 461 below or above the first contact point 432, and a magnet 6 is installed in the magnet mounting groove 461.

[0035] When the rotating shaft 3 rotates, it will drive the rotating wheel 41 of each circuit switching device 4 to rotate. The rotating wheel 41 will drive its two movable contact pieces 44 to move, thereby realizing the electrical connection or disconnection between the movable contact pieces 44 and the wiring copper piece 43 in batches.

[0036] Furthermore, magnet 6 is positioned directly above and below the first contact point 432, and the distance between magnet 6 and the first contact point 432 is extremely short. If an electric arc is generated, the arc will be extinguished under the influence of the magnetic field. Additionally, the magnets 6 of the upper and lower circuit switching device 4 can form a composite magnetic field. Because the circuit switching devices are stacked multiple times, a strong composite magnetic field is formed between each group of magnets 6. The first contact point 432 is located precisely between two magnets 6, thus achieving the function of extinguishing any electric arc. Due to its powerful arc-extinguishing function, this invention can naturally adapt to high-current operation.

[0037] To facilitate installation and shorten the arc-extinguishing distance between the magnet 6 and the first contact point 432, preferably, in any two adjacent sets of circuit switching devices 4, the magnet 6 of the upper set of circuit switching devices 4 is directly above the first contact point 432 of the lower set of circuit switching devices 4. This brings the magnet 6 closer to any potential electric arc.

[0038] Preferably, the circuit switching device 4 consists of a rotating wheel 41, a guide block 42, copper connecting plates 43, a movable contact plate 44, a spring 45, and a plastic seat 46. The rotating wheel 41 is rotatably mounted in the middle position of the plastic seat 46. The rotating wheel 41 has a protrusion 411 in the radial direction to form a cam. The plastic seat 46 has guide grooves 462 on both the left and right sides of the rotating wheel 41. The bottom of the guide block 42 has a guide protrusion 422. The guide block 42 is mounted in the guide groove 462 through the guide protrusion 422 and makes linear reciprocating motion. The guide block 42 has a contact plate mounting groove 421. The movable contact plate 44 is fixedly mounted on the guide block 42 through the contact plate mounting groove 421. The plastic seat 46 has four copper connecting plates 43 installed around its perimeter. Each of the four copper connecting plates 43 has a wire contact end 431 and a first contact point 432. The wire contact end 431 is located on the outside of the plastic seat 46, and the first contact point 432 is located on the inside of the plastic seat 46.

[0039] The movable contact piece 44 has a second contact point 441 on both sides near the first contact point 432. A spring 45 is installed between the movable contact piece 44 and the plastic base 46. Under the action of the spring 45, the movable contact piece 44 pushes the guide block 42 toward the center of the rotating wheel 41, so that the guide block 42 contacts the rotating wheel 41.

[0040] The cam shape of the rotating wheel 41 helps to quickly switch the state of the guide block 42, ultimately achieving rapid switching of the circuit state.

[0041] In order to ensure that the second contact point 441 and the first contact point 432 make accurate contact or separation, the rotating wheel 41 causes the two guide blocks 42 to move linearly when rotating, thereby realizing the contact electrical connection or disconnection between the second contact point 441 and the first contact point 432.

[0042] Preferably, the movable contact 44 has spring mounting seats 451 on the back of each of the two second contact points 441, and springs 45 are installed between the two spring mounting seats 451 of the movable contact 44 and the plastic seat 46. Under the action of the springs 45, the movable contact 44 pushes against the guide block 42 and moves towards the rotating wheel 41. When the rotating wheel 41 rotates, it pushes against the guide block 42 to make linear motion, realizing the contact and separation of the second contact point 441 and the first contact point 432.

[0043] In order to mass-produce and reduce production costs, preferably, the wiring copper piece 43 and the movable contact piece 44 are made by sheet metal stamping process.

[0044] Preferably, the copper connecting piece 43 and the movable contact piece 44 are made of uniform copper, and the surfaces of the first contact point 432 and the second contact point 441 are both silver-plated. Copper is very suitable for sheet metal stamping in molds, and copper has excellent conductivity. The silver plating of the surfaces of the first contact point 432 and the second contact point 441 helps to reduce contact resistance, reduce the generation of electric arcs, and reduce the magnitude of the arc current.

[0045] For ease of wiring, preferably, the multiple sets of circuit switching devices 4 are installed in a staggered stacked state with the upper and lower sets flipped 180 degrees to each other, so that the upper and lower layers of wiring copper plates 43 are misaligned. The plastic base 46 is provided with a positioning boss 463 on the top and a positioning groove 464 on the bottom. In two adjacent sets of circuit switching devices 4, the positioning boss 463 of the lower set of circuit switching devices 4 matches the positioning groove 464 of the upper set of circuit switching devices 4.

[0046] The upper and lower layers of copper contacts 43 are staggered to facilitate wiring by the operator.

[0047] Preferably, the base 1 has two first hexagon countersunk holes 11 on the side near the circuit switching device, and the upper cover 2 has two second hexagon countersunk holes 21 on the side near the circuit switching device. Hexagon bolts are installed on both the first hexagon countersunk holes 11 and the second hexagon countersunk holes 21.

[0048] Preferably, an upper cover base 5 is installed between the upper cover 2 and the uppermost set of circuit switching devices 4. The upper cover base 5 is also provided with an upper cover base positioning groove 51 on the side of the upper cover base 5 near the circuit switching device 4. The upper cover base positioning groove 51 and the positioning boss 463 are matched and positioned with each other. A wear-resistant sleeve 7 is installed on the end of the rotating shaft 3 located on the upper cover base 5. A wear-resistant sleeve 7 is installed on the end of the rotating shaft 3 located on the base 1.

[0049] Preferably, the wire contact end 431 is provided with a threaded hole 433, and a slotted screw or a Phillips screw is installed on the threaded hole 433.

[0050] This embodiment should not be regarded as a limitation of the utility model, but any improvement made based on the spirit of the utility model should be within the protection scope of the utility model.

Claims

1. An auxiliary switch comprising a base (1), an upper cover (2) and a rotating shaft (3), characterized in that: Multiple sets of circuit switching devices (4) are installed between the base (1) and the top cover (2). The multiple sets of circuit switching devices (4) are stacked together. Each circuit switching device (4) includes a rotating wheel (41), a wire connecting plate (43), a movable contact plate (44), and a plastic base (46). The wire connecting plate (43) is fixedly installed on the plastic base (46). The wire connecting plate (43) is provided with a wire contact end (431) and a first contact point (432). The wire contact end (431) is located outside the plastic base (46), and the first contact point (432) is located inside the plastic base (46). The movable contact plate (44) is movably installed on the plastic base (46), and the movable contact plate (44) moves in a straight line. The circuit switching device (4) has a rotating shaft (3) installed in the middle. The rotating shaft (3) passes through each group of circuit switching devices (4) in sequence, and the rotating shaft (3) is matched and fixed with the rotating wheel (41) of each group of circuit switching devices (4). When the rotating shaft (3) rotates, it drives the rotating wheel (41) of each group of circuit switching devices (4) to rotate. When the rotating wheel (41) rotates, it will drive different movable contact pieces (44) to make linear motion to realize the electrical connection or disconnection between the movable contact piece (44) and the wiring copper piece (43). The copper wire (43) is electrically connected to the outside. The plastic base (46) of each circuit switching device (4) is provided with a magnet mounting groove (461) below or above the first contact point (432). A magnet (6) is installed in the magnet mounting groove (461).

2. An auxiliary switch according to claim 1, characterized in that: In the multiple circuit switching devices (4), in any two adjacent circuit switching devices (4), the magnet (6) of the circuit switching device (4) located above is directly above the first contact point (432) of the circuit switching device (4) located below.

3. An auxiliary switch according to claim 2, characterised in that: The circuit switching device (4) consists of a rotating wheel (41), a guide block (42), a copper wire (43), a movable contact (44), a spring (45), and a plastic seat (46). The rotating wheel (41) is rotatably mounted in the middle of the plastic seat (46). The rotating wheel (41) has a protrusion (411) in the radial direction to form a cam. The plastic seat (46) has guide grooves (462) on both the left and right sides of the rotating wheel (41). The bottom of the guide block (42) has a guide protrusion (422). The guide block (42) passes through the guide protrusion (422). The movable contact (44) is installed in the guide groove (462) and moves linearly back and forth. The guide block (42) is provided with a contact plate mounting groove (421). The movable contact (44) is fixedly installed on the guide block (42) through the contact plate mounting groove (421). The plastic base (46) is equipped with four wire copper pieces (43) around its perimeter. Each of the four wire copper pieces (43) is provided with a wire contact end (431) and a first contact point (432). The wire contact end (431) is located outside the plastic base (46), and the first contact point (432) is located inside the plastic base (46). The movable contact piece (44) has a second contact point (441) on both sides near the first contact point (432). A spring (45) is installed between the movable contact piece (44) and the plastic seat (46). Under the action of the spring (45), the movable contact piece (44) pushes the guide block (42) towards the center of the rotating wheel (41) so that the guide block (42) contacts the rotating wheel (41). When the wheel (41) rotates, the two guide blocks (42) each make linear motion, thereby realizing the electrical connection or disconnection between the second contact point (441) and the first contact point (432).

4. An auxiliary switch according to claim 3, characterised in that: The movable contact (44) has spring mounting seats (451) on the back of the two second contact points (441), and springs (45) are installed between the two spring mounting seats (451) of the movable contact (44) and the plastic seat (46).

5. An auxiliary switch according to claim 4, characterised in that: The wiring copper piece (43) and the movable contact piece (44) are made by sheet metal stamping process.

6. An auxiliary switch according to claim 4, characterized in that: The wiring copper piece (43) and the movable contact piece (44) are made of uniform purple copper material, and the surfaces of the first contact point (432) and the second contact point (441) are both silver plated.

7. An auxiliary switch according to any one of claims 1 to 6, characterized in that: The multiple circuit switching devices (4) are installed in a staggered stacked state with the upper and lower sets flipped 180 degrees to each other, so that the upper and lower layers of copper wire sheets (43) are staggered. The plastic base (46) is provided with a positioning boss (463) on the top and a positioning groove (464) on the bottom. In the two adjacent sets of circuit switching devices (4), the positioning boss (463) of the lower set of circuit switching devices (4) matches the positioning groove (464) of the upper set of circuit switching devices (4).

8. An auxiliary switch according to any one of claims 1 to 6, characterized in that: The base (1) has two first internal hexagon countersunk holes (11) on the side near the circuit switching device, and the top cover (2) has two second internal hexagon countersunk holes (21) on the side near the circuit switching device. External hexagon bolts are installed on both the first internal hexagon countersunk holes (11) and the second internal hexagon countersunk holes (21).

9. An auxiliary switch according to claim 8, characterised in that: An upper cover base (5) is installed between the upper cover (2) and the uppermost circuit switching device (4). The upper cover base (5) is also provided with an upper cover base positioning groove (51) on the side of the upper cover base (5) near the circuit switching device (4). The upper cover base positioning groove (51) and the positioning boss (463) are matched and positioned with each other. A wear-resistant sleeve (7) is installed on the end of the rotating shaft (3) located on the upper cover base (5). A wear-resistant sleeve (7) is installed on the end of the rotating shaft (3) located on the base (1).

10. An auxiliary switch according to claim 9, characterized in that: The wire contact end (431) is provided with a threaded hole (433), and a slotted screw or a Phillips screw is installed on the threaded hole (433).

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