Switching over-range precision control device

Abstract

The utility model discloses a kind of switch overrange accurate control device, including switch base, static contact and magnetic drive mechanism being installed on switch base, be installed on switch base, and with the movable contact assembly of magnetic drive mechanism swing connection;Movable contact assembly includes multiple movable contact, and each movable contact is equipped with overrange adjusting structure, overrange adjusting structure can drive corresponding movable contact to move, the movement range of movable contact is adjusted;Magnetic drive mechanism can be driven movable contact to rotate by electromagnetic excitation and be closed with static contact, or with static contact is openedThe utility model is provided with overrange adjusting structure, and overrange adjusting structure and movable contact are one-to-one corresponding by cooperation, the overrange stroke of each movable contact can be individually adjusted, support every pole overrange amount independent adjustment, improve the action synchronism of multiple-pole contact, reduce the influence of machining accuracy and assembly error to overrange.

Description

Technical Field

[0001] This utility model relates to the field of switching technology, specifically to a switch overtravel precision control device. Background Technology

[0002] Switch overtravel is an important parameter in mechanical switches, referring to the extra stroke that the switch's drive components (such as buttons, levers, etc.) can continue to move after the contacts have completed their effective action (such as closing or opening).

[0003] The overtravel setting of the switch can effectively eliminate poor contact caused by mechanical tolerances or vibration; reduce contact bounce or impact through buffering; and compensate for installation errors or differences in operating force.

[0004] With the rapid development of integrated photovoltaic-energy storage-charging systems, and considering the off-grid switching switch as a core component for safe system operation, it is necessary to achieve millisecond-level seamless switching during grid anomalies or active grid disconnection. However, existing technologies mainly employ methods such as overall screw adjustment, shim compensation, and elastic element pre-loading, all of which have limitations. Specifically:

[0005] 1. Overall Screw Adjustment Method: This method mainly adjusts the overall stroke of all hoe linkage mechanisms by rotating screws to change the overtravel. The main drawbacks are: individual contact points cannot be adjusted separately; multi-stage synchronization is highly dependent on machining accuracy; and wear and tear over long-term use leads to accumulated deviations. When the time difference between multi-stage contact actions exceeds 0.5ms, it may cause arc reignition or current surges, exacerbating temperature imbalance and lifespan degradation, threatening the inverter (PCS) and charging pile equipment.

[0006] 2. Shim Compensation Method: This method involves adding or removing shims at the contact spring or connecting rod to compensate for overtravel losses due to contact wear. The main drawbacks are: adjustment requires disassembling the switch, making the operation complex and unable to dynamically adapt to real-time operating conditions; it is only suitable for offline maintenance scenarios.

[0007] 3. Elastic element pre-compression method: Elastic materials (such as silicone pads) are used to absorb the impact of contact movement, indirectly maintaining overtravel stability. The main drawbacks are: the elastic element is prone to aging and displacement after long-term use, making it difficult to meet the high-frequency switching requirements of optical storage and charging scenarios.

[0008] Therefore, there is an urgent need to provide a precise overtravel control device for integrated photovoltaic, energy storage and charging systems. Utility Model Content

[0009] The purpose of this invention is to propose a precise control device for switch overtravel, thereby solving the problem that existing switching devices in the background art cannot meet the requirements of integrated photovoltaic, energy storage, and charging systems.

[0010] To achieve the above objectives, this utility model proposes a switch overtravel precision control device, including a switch base, wherein a stationary contact and a magnetic drive mechanism are mounted on the switch base, and a moving contact assembly is mounted on the switch base and movably connected to the magnetic drive mechanism.

[0011] Optionally, the moving contact assembly includes multiple moving contacts, each of which is equipped with an overtravel adjustment structure. The overtravel adjustment structure can drive the corresponding moving contact to move, thereby adjusting the range of movement of the moving contact. The magnetic drive mechanism can drive the moving contact to rotate and close with the stationary contact or open with the stationary contact via electromagnetic excitation.

[0012] Optionally, the moving contact assembly further includes a moving contact mounting base movably mounted on the switch base, a moving contact rotating shaft movably mounted on the moving contact mounting base, and a rotating shaft movably mounted on the moving contact mounting base, the rotating shaft being movably connected to the magnetic drive mechanism, and the moving contact being movably mounted on the moving contact rotating shaft.

[0013] Optionally, the magnetic drive mechanism moves the rotating shaft, causing the moving contact mounting base to rotate, so that the moving contact assembly contacts the stationary contact to close the circuit, or separates to open the circuit.

[0014] Optionally, the moving contact mounting base is provided with a mounting cavity for movably connecting with the rotating shaft of the moving contact, and the bottom of the mounting cavity is provided with a limiting platform for limiting the overtravel adjustment structure; the moving contact mounting base is also provided with a telescopic cavity communicating with the mounting cavity.

[0015] Optionally, an elastic element is installed inside the telescopic cavity that abuts against the top of the moving contact. This elastic element can retract along the length of the telescopic cavity. When the magnetic drive mechanism drives the moving contact to open with the stationary contact, the elastic element is in a compressed state. When the magnetic drive mechanism drives the moving contact to close with the stationary contact, the elastic element resets.

[0016] Optionally, the elastic force of the elastic element drives the moving contact to rotate around the moving contact rotation axis, and the overtravel adjustment structure restricts the rotation of the moving contact.

[0017] Optionally, the overtravel adjustment structure includes an adjustment bracket, an adjustment plate movably mounted on the adjustment bracket and abutting against the bottom end of the moving contact, a moving contact adjustment component mounted on the adjustment plate and abutting against the adjustment bracket, and a connecting shaft mounted on the moving contact and movably connected to the adjustment bracket.

[0018] Optionally, the adjusting bracket is provided with a groove and a through groove, the groove opening direction of which is perpendicular to the groove opening direction; the adjusting plate is located in the groove, and the adjusting plate is provided with limiting blocks located in the through groove on both sides.

[0019] Optionally, when the moving contact and the stationary contact are closed, the moving contact adjusting member is movably connected to the adjusting plate; the top surface of the adjusting plate is in contact with the bottom surface of the moving contact.

[0020] Optionally, the magnetic drive mechanism includes a magnetic drive mounting bracket mounted on a switch base, an electromagnet mounted on the magnetic drive mounting bracket, and a movable guide structure mounted on the magnetic drive mounting bracket and connected to the electromagnet.

[0021] Optionally, the moving guide structure includes a limiting rotary shaft mounted on a magnetic drive mounting bracket, a rotary connecting plate movably mounted on the limiting rotary shaft, a moving connecting block mounted on an electromagnet, a horizontal moving shaft mounted on the moving connecting block, and a linkage plate movably mounted on the horizontal moving shaft and movably connected to the rotating shaft.

[0022] Compared with the prior art, this utility model provides a precise control device for switch overtravel, which has the following beneficial effects:

[0023] This switch overtravel precision control device, through the setting of the overtravel adjustment structure, and in conjunction with the one-to-one correspondence between the overtravel adjustment structure and the moving contact, can individually adjust the overtravel of each moving contact, support independent adjustment of the overtravel amount of each pole, improve the synchronization of multi-pole contact action, and reduce the impact of machining accuracy and assembly errors on overtravel.

[0024] In addition, the overtravel adjustment structure is directly installed on the moving contact assembly, and when adjusting the overtravel of the moving contact, there is no need to replace parts; the adjustment can be made directly on the overtravel adjustment structure, thereby improving adjustment efficiency and quality. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0026] Figure 2 This is a structural schematic diagram of the switch base of this utility model.

[0027] Figure 3 This is a structural schematic diagram of the moving contact and magnetic drive mechanism of this utility model.

[0028] Figure 4 This is a schematic diagram of the magnetic drive mechanism of this utility model.

[0029] Figure 5 This is a schematic diagram of the structure of the moving contact assembly and stationary contact of this utility model when the circuit is closed.

[0030] Figure 6 This is a schematic diagram of the moving contact mounting base and the moving contact of this utility model.

[0031] Figure 7 This is a structural schematic diagram of the moving contact mounting base of this utility model.

[0032] Figure 8 This is a schematic diagram of the moving contact and overtravel adjustment structure of this utility model.

[0033] Figure 9 This is a side view of the moving contact and overtravel adjustment structure of this utility model.

[0034] Figure 10 This is a utility model Figure 9 A magnified view of a portion of point A in the middle.

[0035] Figure 11 This is a schematic diagram of the overtravel adjustment structure of this utility model.

[0036] The diagram identifies the following components: 1. Switch base; 2. Stationary contact; 3. Magnetic drive mechanism; 31. Magnetic drive mounting bracket; 32. Electromagnet; 33. Moving guide structure; 331. Limiting rotation shaft; 332. Rotating connecting plate; 333. Moving connecting block; 334. Horizontal moving shaft; 336. Linkage plate; 4. Moving contact assembly; 41. Moving contact; 43. Moving contact mounting base; 431. Mounting cavity; 432. Limiting platform; 433. Telescopic cavity; 434. Elastic element; 44. Moving contact rotation shaft; 45. Rotating shaft; 5. Overtravel adjustment structure; 51. Adjusting bracket; 52. Adjusting plate; 53. Moving contact adjusting component; 54. Connecting shaft; 55. Groove; 56. Through groove; 57. Limiting block. Detailed Implementation

[0037] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, illustrates the present invention. Numerous specific details are set forth in the description below to provide a thorough understanding of the invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0038] The switch overtravel precision control device of this application can be applied to occasions with high-frequency switching requirements such as integrated photovoltaic energy storage and charging systems, and can also be used in other similar application scenarios. The switch overtravel precision control device is described in detail below.

[0039] See appendix Figure 1 — Figure 11The diagram shows a preferred embodiment of a switch differential tripping precision control device according to this application. The device includes a switch base, a stationary contact 2 and a magnetic drive mechanism 3 mounted on the switch base 1, and a moving contact assembly 4 mounted on the switch base 1 and movably connected to the magnetic drive mechanism 3. The magnetic drive mechanism 3 can drive the moving contact 41 to rotate and close or open with the stationary contact 2 via electromagnetic excitation. The moving contact assembly 4 includes multiple moving contacts 41, each equipped with an overtravel adjustment structure 5. The number of overtravel adjustment structures 5 is equal to the number of moving contacts 41, and the travel of each moving contact 41 can be adjusted by the overtravel adjustment structure 5 mounted thereon.

[0040] This invention provides installation conditions through the switch base 1; the magnetic drive mechanism 3 serves as a power source to move the moving contact 41 in the moving contact assembly 4, allowing the moving contact 41 to contact the stationary contact 2 for closing and energizing, or to separate from the stationary contact 2 for opening and de-energizing. This allows for remote control while ensuring the speed of closing and opening, reducing the probability of arcing. The overtravel adjustment structure 5 allows for adjustment of the stroke of the moving contact 41. With an equal number of overtravel adjustment structures 5 and moving contacts 41, each overtravel adjustment structure 5 can individually adjust the stroke of the moving contact 41 it contacts. This allows for precise adjustment of each moving contact 41, improving the synchronization between multiple moving contacts 41, reducing the accumulation of deviations after long-term wear, reducing arc reignition and current surges, and protecting the inverter (PCS) and charging pile equipment.

[0041] See appendix Figure 3 and Figure 4 As shown, in this utility model, the magnetic drive mechanism 3 can drive the rotating shaft 45 to move, causing the moving contact mounting base 43 to rotate, so that the moving contact assembly 4 can contact the stationary contact 2 to close the circuit or separate the circuit to open the circuit; wherein, the magnetic drive mechanism 3 includes a magnetic drive mounting frame 31 mounted on the switch base 1, an electromagnet 32 ​​mounted on the magnetic drive mounting frame 31, and a moving guide structure 33 mounted on the magnetic drive mounting frame 31 and connected to the electromagnet 32.

[0042] This invention uses an electromagnet 32 ​​as a power source to drive a rotating shaft 45 to reciprocate at equal distances. The electromagnet 32 ​​can be a push-pull type electromagnet. The moving guide structure 33 guides the rotating shaft 45 as it moves, ensuring normal movement.

[0043] See appendix Figure 4As shown, in this utility model, the movable guide structure 33 includes a limiting rotating shaft 331 mounted on the magnetic drive mounting bracket 31, a rotating connecting plate 332 movably mounted on the limiting rotating shaft 331, a movable connecting block 333 mounted on the electromagnet 32 ​​by a nut, a horizontal moving shaft 334 mounted on the moving connecting block 333 and connected to the rotating connecting plate 332, and a linkage plate 336 movably mounted on the horizontal moving shaft 334 and movably connected to the rotating shaft 45.

[0044] This invention uses a limiting rotating shaft 331 to limit one end of the rotating connecting plate 332, ensuring that the rotating connecting plate 332 can only rotate and move around the limiting rotating shaft 331. The movable connecting block 333, the horizontal moving shaft 334, and the linkage plate 336 are used to transmit power to the electromagnet 32, allowing the electromagnet 32 ​​to drive the moving contact 41 to rotate and move. It should be noted that the rotating connecting plate 332 has an oblong hole corresponding to the horizontal moving shaft 334, and the magnetic drive mounting bracket 31 has a guide groove corresponding to the horizontal moving shaft 334.

[0045] See appendix Figure 3 — Figure 10 As shown, in this utility model, the moving contact assembly 4 also includes a moving contact mounting base 43 movably mounted on the switch base 1, a moving contact rotating shaft 44 movably mounted on the moving contact mounting base 43, and a rotating shaft 45 movably mounted on the moving contact mounting base 43. The rotating shaft 45 is movably connected to the magnetic drive mechanism 3, and the moving contact 41 is pivotally mounted on the moving contact rotating shaft 44.

[0046] This utility model provides installation conditions for the moving contact 41 and the overtravel adjustment structure 5 by setting the moving contact mounting base 43; by setting the moving contact rotation shaft 44, it provides a rotation center for the moving contact 41, so that the moving contact 41 can rotate regularly clockwise and counterclockwise; by setting the rotating shaft 45, the magnetic drive mechanism 3 can drive the contact mounting base 43 to rotate, thereby driving the moving contact 41 to move.

[0047] See appendix Figure 3 — Figure 11 As shown, in this utility model, the moving contact mounting base 43 is provided with a mounting cavity 431 for movably connecting with the moving contact rotation shaft 44, and the bottom of the mounting cavity 431 is provided with a limiting platform 432 for limiting the overtravel adjustment structure 5; the moving contact mounting base 43 is also provided with a telescopic cavity 433 communicating with the mounting cavity 431.

[0048] This invention provides installation space for the rotating shaft 44 of the moving contact 41 through the installation cavity 431. The rotating shaft 44 is installed in the installation cavity 431 by snap-fit. The limiting platform 432 limits the adjustment bracket 51, ensuring that the adjustment bracket 51 cannot move when the moving contact adjustment component 53 is adjusted, allowing the adjustment plate 52 to move relative to it, thereby driving the moving contact 41 to move and adjusting the range of movement of the moving contact 41. The telescopic cavity 433 provides installation space for the elastic component 434 and guides the telescopic direction.

[0049] See appendix Figure 5 — Figure 11 As shown, in this utility model, the overtravel adjustment structure 5 is installed on the moving contact mounting base 43 and located at the bottom of the moving contact 41; wherein, the overtravel adjustment structure 5 includes an adjustment bracket 51 connected to the moving contact 41, an adjustment plate 52 movably installed on the adjustment bracket 51 and abutting against the moving contact 41, a moving contact adjustment member 53 installed on the adjustment plate 52 and abutting against the adjustment bracket 51, and a connecting shaft 54 ​​installed on the moving contact 41 and movably connected to the adjustment bracket 51.

[0050] This invention uses an adjustable bracket 51 as a mounting base, which, together with a connecting shaft 54, is mounted on the moving contact 41. This allows the entire overtravel adjustment structure 5 to move synchronously with the moving contact 41, enabling each overtravel adjustment structure 5 to individually adjust the stroke of its corresponding moving contact 41. The adjustable plate 52 is used to limit the bottom of the moving contact 41, thus adjusting its stroke. The moving contact adjusting member 53 is used to adjust the distance between the adjusting plate 52 and the bottom surface of the adjustable bracket 51. With the stroke of the magnetic drive mechanism 3 fixed, this changes the stroke (overtravel) of the moving contact 41.

[0051] See appendix Figure 5 — Figure 11 As shown, the adjusting bracket 51 is provided with a groove 55 and a through groove 56, wherein the opening direction of the through groove 56 is perpendicular to the opening direction of the groove 55; the adjusting plate 52 is located in the groove 55, and the two sides of the adjusting plate 52 are provided with limiting blocks 57 located in the through groove 56; the moving contact 41 is equipped with a connecting shaft 54, which is located in the through groove 56.

[0052] This invention provides installation space for the adjusting plate 52 through the groove 55, allowing the adjusting plate 52 to contact the bottom of the moving contact 41 and adjust the position of the moving contact 41. The through groove 56, in conjunction with the limiting block 57, restricts the adjusting plate 52 to the adjusting bracket 51. Since the adjusting bracket 51 is mounted on the moving contact 41 via the connecting shaft 54, the adjusting plate 52 can also move with the moving contact 41, preventing it from separating from the adjusting bracket 51 during movement. It should be noted that both ends of the connecting shaft 54 ​​are also located in the through groove 56, and the limiting block 57 is located between the connecting shaft 54 ​​and the bottom surface of the adjusting bracket 51.

[0053] See appendix Figure 9 and Figure 10 As shown, in this utility model, the moving contact adjusting member 53 is threadedly connected to the adjusting plate 52, and the moving contact adjusting member 53 can be a bolt; the top surface of the adjusting plate 52 is in contact with the bottom surface of the moving contact 41.

[0054] See appendix Figure 5 — Figure 7 As shown, in this utility model, an elastic element 434 is installed on the moving contact mounting base 43, and the elastic element 434 abuts against the top of the moving contact 41; it should be noted that the elastic element 434 can be a spring, and one end of the spring abuts against the top of the moving contact 41.

[0055] See appendix Figure 1 — Figure 11 As shown, the principle of overtravel adjustment of the moving contact assembly 4 in this utility model is as follows:

[0056] When the bottom of the adjusting plate 52 contacts the bottom of the groove 55, the top surface of the adjusting plate 52 contacts the moving contact 41, which is the initial state. Then, the operator uses a tool to rotate the moving contact adjusting member 53, causing it to move towards the bottom surface of the adjusting bracket 51. This pushes the adjusting bracket 51 away from the moving contact 41, causing the moving contact adjusting member 53 to move downwards. This increases the distance between the adjusting plate 52 and the adjusting bracket 51, allowing the moving contact 41 to move and thus adjusting its overtravel. It should be noted that when the moving contact adjusting member 53 is in the initial position, the distance between the center line of the connecting shaft 54 ​​and the bottom of the through groove 56 is greater than the diameter of the connecting shaft 54. That is, in the initial position, the connecting shaft 54 ​​is not in contact with the bottom of the through groove 56 and can still move along the through groove.

[0057] The above embodiments are illustrative of this application and are not intended to limit this application. Any simple modifications to this application are within the protection scope of this application.

Claims

1. A switch overtravel precision control device, comprising a switch base (1), characterized in that, It also includes a stationary contact (2) and a magnetic drive mechanism (3) mounted on the switch base (1), and a moving contact assembly (4) mounted on the switch base (1) and movably connected to the magnetic drive mechanism (3). The moving contact assembly (4) includes multiple moving contacts (41), and each moving contact (41) is equipped with an overtravel adjustment structure (5). The overtravel adjustment structure (5) can drive the corresponding moving contact (41) to move and adjust the movement range of the moving contact (41). The magnetic drive mechanism (3) can drive the moving contact (41) to rotate and close with the stationary contact (2) or open with the stationary contact (2) by electromagnetic excitation.

2. The switch overtravel precision control device according to claim 1, characterized in that, The moving contact assembly (4) further includes a moving contact mounting base (43) movably mounted on the switch base (1), a moving contact rotating shaft (44) movably mounted on the moving contact mounting base (43), and a rotating shaft (45) movably mounted on the moving contact mounting base (43). The rotating shaft (45) is movably connected to the magnetic drive mechanism (3), and the moving contact (41) is movably mounted on the moving contact rotating shaft (44). The magnetic drive mechanism (3) drives the rotating shaft (45) to move, causing the moving contact mounting base (43) to rotate, so that the moving contact assembly (4) contacts the stationary contact (2) to close the circuit, or separates the circuit to open the circuit.

3. The switch overtravel precision control device according to claim 2, characterized in that, The moving contact mounting base (43) is provided with a mounting cavity (431) for movably connecting with the moving contact rotating shaft (44), and the bottom of the mounting cavity (431) is provided with a limiting platform (432) for limiting the overtravel adjustment structure (5). The moving contact mounting base (43) is also provided with a telescopic cavity (433) that communicates with the mounting cavity (431).

4. The switch overtravel precision control device according to claim 3, characterized in that, The elastic element (434) installed in the telescopic cavity (433) abuts against the top of the moving contact (41), and the elastic element (434) can contract along the length of the telescopic cavity (433); When the magnetic drive mechanism (3) drives the moving contact (41) to open with the stationary contact (2), the elastic element (434) is compressed. When the magnetic drive mechanism (3) drives the moving contact (41) to close with the stationary contact (2), the elastic element (434) is reset. The elastic force of the elastic element (434) drives the moving contact (41) to rotate around the moving contact rotation axis (44), and the overtravel adjustment structure (5) restricts the rotation of the moving contact (41).

5. The switch overtravel precision control device according to any one of claims 1-4, characterized in that, The overtravel adjustment structure (5) includes an adjustment bracket (51), an adjustment plate (52) movably mounted on the adjustment bracket (51) and abutting against the bottom end of the moving contact (41), a moving contact adjustment component (53) mounted on the adjustment plate (52) and abutting against the adjustment bracket (51), and a connecting shaft (54) mounted on the moving contact (41) and movably connected to the adjustment bracket (51).

6. The switch overtravel precision control device according to claim 5, characterized in that, The adjusting bracket (51) is provided with a groove (55) and a through groove (56), and the opening direction of the through groove (56) is perpendicular to the opening direction of the groove (55). The adjusting plate (52) is located in the groove (55), and the two sides of the adjusting plate (52) are provided with limiting blocks (57) located in the through groove (56).

7. The switch overtravel precision control device according to claim 5, characterized in that, The moving contact adjusting member (53) is movably connected to the adjusting plate (52); When the moving contact (41) and the stationary contact (2) are closed, the top surface of the adjusting plate (52) contacts the bottom surface of the moving contact (41).

8. The switch overtravel precision control device according to claim 6, characterized in that, When the moving contact adjustment member (53) is in the initial position, the distance between the center line of the connecting shaft (54) and the bottom of the through groove (56) is greater than the diameter of the connecting shaft (54).

9. The switch overtravel precision control device according to claim 3, characterized in that, The magnetic drive mechanism (3) includes a magnetic drive mounting bracket (31) mounted on a switch base (1), an electromagnet (32) mounted on the magnetic drive mounting bracket (31), and a movable guide structure (33) mounted on the magnetic drive mounting bracket (31) and connected to the electromagnet (32).

10. The switch overtravel precision control device according to claim 9, characterized in that, The moving guide structure (33) includes a limiting rotating shaft (331) mounted on a magnetic drive mounting bracket (31), a rotating connecting plate (332) movably mounted on the limiting rotating shaft (331), a moving connecting block (333) mounted on an electromagnet (32), a horizontal moving shaft (334) mounted on the moving connecting block (333), and a linkage plate (336) movably mounted on the horizontal moving shaft (334) and movably connected to the rotating shaft (45).

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