An isolated arc extinguishing structure

Abstract

The utility model discloses an isolation arc extinguishing structure, including, the shell is equipped with the accommodation cavity, and the accommodation cavity inner wall is equipped with a plurality of recesss, and the dynamic touch disc is contained in the accommodation cavity, and the dynamic touch disc is relative to the rotation of shell, and the dynamic touch disc is fixed with the dynamic touch subassembly, and the number of static contact is two, and two static contacts are contained in the accommodation cavity, and two static contacts are respectively with dynamic touch subassembly cooperation, and the push element is connected with the dynamic touch disc, and the push element is relative to the rotation of dynamic touch disc, and the slide plate is relative to the dynamic touch disc sliding, and the slide plate is linked with push element, and when the dynamic touch disc rotates, the push element is matched with the recess, and the push element rotates and drives the slide plate movement, and this kind of structure, need not the elastic energy storage device, only through mechanical connection forms the reciprocating motion of slide plate to the effective increase arc length, improves arc extinguishing effect.

Description

Technical Field

[0001] This utility model relates to the field of electrical technology, specifically to an isolation and arc-extinguishing structure. Background Technology

[0002] During the opening and closing process of an electrical switch, the moving contact and the stationary contact will discharge and generate an electric arc as they move from connection to disconnection. The electric arc will delay the circuit breaking and may even burn the contacts, causing the contacts to melt and weld. In severe cases, it may lead to the electrical switch exploding.

[0003] In existing technologies, an arc is initiated by setting up a magnetic field and then absorbed by an arc-extinguishing shroud. The problem with this structure is that the magnetic field is formed by the interaction of two magnets, and the polarity of the magnets must be considered during installation, making incorrect installation easy. Another approach involves using mechanical structures for isolation. When the moving and stationary contacts separate, the arc-extinguishing plate directly severs the connection between them, lengthening the arc and thus achieving arc extinguishing. However, current mechanical structures typically use elastic energy storage devices such as springs or torsion springs to achieve this isolation and arc extinguishing effect. The drawback is that these elastic energy storage devices are prone to elastic fatigue, and during installation, operators must overcome elastic pressure, resulting in low assembly efficiency. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is how to isolate the arc-extinguishing effect. To this end, an arc-extinguishing isolation structure is provided, comprising:

[0005] The housing has a receiving cavity, and the inner wall of the receiving cavity has a plurality of grooves;

[0006] A movable contact plate is housed in the receiving cavity and rotates relative to the housing; a movable contact assembly is fixed to the movable contact plate.

[0007] The stationary contact has two components, which are housed in the receiving cavity and respectively cooperate with the moving contact assembly.

[0008] A pusher, which is connected to the movable contact disk and rotates relative to the movable contact disk;

[0009] A skateboard that slides relative to the movable contact plate and is linked to the pusher;

[0010] When the movable contact plate rotates, the pusher engages with the groove, and the rotation of the pusher drives the slide plate to move.

[0011] The pusher is provided with at least two first legs and a second leg, the first legs engaging with the groove and the second legs engaging with the slide plate.

[0012] The skateboard has a groove, and the second leg slides relative to the groove.

[0013] The movable contact plate is provided with a guide rail groove, and the slide plate slides on the guide rail groove.

[0014] One of the guide rail groove sidewall and the slide plate is provided with a limiting protrusion, and the other of the guide rail groove sidewall and the slide plate is provided with a limiting protrusion that cooperates with the limiting protrusion.

[0015] The moving contact plate is provided with a limiting surface, which cooperates with the stationary contact.

[0016] The moving contact plate has a fixing post on its side, the fixing post has a limiting lug, the pushing member has a through hole and a notch, the notch communicates with the through hole, the through hole cooperates with the fixing post, and the notch cooperates with the limiting lug.

[0017] It also includes an arc-extinguishing grid plate, which is housed in the receiving cavity and is located on the movement trajectory of the moving contact assembly.

[0018] The movable contact plate is provided with a mating part, which extends through the housing to the outside. The outer surface of the housing is provided with a limiting part, which is located on the rotation trajectory of the mating part.

[0019] The technical solution of this utility model has the following advantages:

[0020] 1. This utility model provides an arc-extinguishing isolation structure. The rotation of the moving contact plate connects or disconnects the moving contact assembly from the stationary contact, achieving the opening and closing effect. Simultaneously, the rotation of the moving contact plate causes the groove to engage with the pushing component, causing the pushing component to rotate relative to the moving contact plate. The rotation of the pushing component drives the sliding plate, achieving the effect of cutting off and extinguishing the arc. Conversely, if the pushing component rotates in the opposite direction, it will also drive the sliding plate, achieving a direct driving effect. This structure eliminates the need for an elastic energy storage device; the reciprocating motion of the sliding plate is achieved solely through mechanical connection, effectively increasing the arc length and improving the arc-extinguishing effect.

[0021] 2. The present invention provides an isolation and arc-extinguishing structure, in which multiple first legs respectively cooperate with grooves and second legs cooperate with the slide plate to form a relative movement between the shell and the pusher, thereby achieving the effect of the pusher driving the slide plate to move.

[0022] 3. The arc-extinguishing isolation structure provided by this utility model has a guide effect formed by the cooperation between the slide groove and the second support leg. At the same time, when the second support leg abuts against the side wall of the slide groove, it also drives the slide plate to move. In addition, the second support leg can also be used as a soft connection structure to form a linkage effect between the pusher and the slide plate, or a hinge structure can be used to achieve the connection.

[0023] 4. The present invention provides an arc-extinguishing isolation structure in which the slide plate slides on the guide rail groove, forming a guiding effect and making the slide plate slide more smoothly.

[0024] 5. The present invention provides an isolation and arc-extinguishing structure in which the limiting protrusion and the limiting protrusion cooperate to form a limiting effect and prevent the slide plate from shifting position.

[0025] 6. The arc-extinguishing isolation structure provided by this utility model has a limiting surface that creates a limiting effect and prevents excessive rotation.

[0026] 7. The present invention provides an isolation arc extinguishing structure, wherein the limiting lug forms a limiting effect, and the pusher component falls off when the value is lost.

[0027] 8. The present invention provides an arc-extinguishing isolation structure in which the arc-extinguishing grid plate has an arc-extinguishing effect and the sliding plate has a guiding effect, making it easier for the electric arc to enter the arc-extinguishing grid plate.

[0028] 9. The present invention provides an isolation arc extinguishing structure, wherein the limiting part forms a limiting effect to prevent excessive rotation. Attached Figure Description

[0029] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the isolation and arc-extinguishing structure provided by this utility model;

[0031] Figure 2 This is a schematic diagram of the isolation and arc-extinguishing structure provided by this utility model from another angle;

[0032] Figure 3 A cross-sectional view of the open circuit state provided by this utility model;

[0033] Figure 4 A schematic diagram of the open circuit state provided by this utility model;

[0034] Figure 5 A schematic diagram illustrating the structure of the movable contact plate, movable contact component, pusher, and slide plate provided by this utility model;

[0035] Figure 6 A schematic diagram of the closed state provided by this utility model;

[0036] Figure 7for Figure 6 A partial structural diagram;

[0037] Figure 8 A schematic diagram of the structure of the shell provided by this utility model.

[0038] Explanation of reference numerals in the attached figures:

[0039] 11. Housing; 12. Moving contact plate; 13. Moving contact assembly; 14. Stationary contact; 15. Pushing element; 16. Slide plate; 17. Limiting protrusion; 18. Limiting protrusion; 19. Arc extinguishing grid plate; 111. Receiving cavity; 112. Groove; 113. Limiting part; 121. Guide rail groove; 122. Limiting surface; 123. Fixing post; 124. Limiting lug; 125. Mating part; 151. First support leg I; 152. First support leg II; 153. First support leg III; 154. Second support leg; 155. Fixing part; 156. Through hole; 157. Notch; 161. Slide groove. Detailed Implementation

[0040] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0041] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0043] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0044] Example 1

[0045] This embodiment provides an isolation arc-extinguishing structure, as shown in the attached figure. Figures 1-8 As shown, it includes:

[0046] The housing 11 has a receiving cavity 111, and the inner wall of the receiving cavity 111 has a plurality of grooves 112. The number of grooves 112 can be adjusted according to actual needs. The arrangement of the grooves 112 can also be adjusted according to actual needs, and can be arranged in a matrix or in a circular array. In this embodiment, a plurality of grooves 112 are arranged in a circular array on the inner wall of the receiving cavity 111.

[0047] A movable contact plate 12 is housed in a receiving cavity 111 and rotates relative to the housing 11. A movable contact assembly 13 is fixed to the movable contact plate 12. The movable contact plate 12 is linked to an external handle, which drives the movable contact plate 12 to rotate, thereby rotating the movable contact assembly 13 and establishing a connection or disconnection between the movable contact assembly 13 and the stationary contact 14. The connection between the movable contact assembly 13 and the stationary contact 14 can be a clamping connection or a mating connection, which can be adjusted according to actual needs by those skilled in the art. Simultaneously, the movable contact assembly 13 also applies pressure to the contact, allowing the movable contact in the movable contact assembly 13 to better form an electrical connection with the stationary contact 14.

[0048] There are two stationary contacts 14, housed in the receiving cavity 111. Each stationary contact 14 cooperates with a moving contact assembly 13, which connects or disconnects the two stationary contacts 14, thus achieving the closing and opening effects. The moving contact assembly 13 and the two stationary contacts 14 form a double-break structure: in the open state, both ends of the moving contact assembly 13 are not connected to the two stationary contacts 14; in the closed state, both ends of the moving contact assembly 13 are connected to the two stationary contacts 14. Alternatively, the moving contact assembly 13 and the two stationary contacts 14 can form a single-break structure: in the open state, one end of the moving contact assembly 13 is connected to one stationary contact 14, while the other end is not connected to the other stationary contact 14; in the closed state, the moving contact assembly 13 rotates, connecting the other end of the moving contact assembly 13 to the other stationary contact 14. In this embodiment, a double-breakpoint structure is used as an example for description. Therefore, in this embodiment, there are two pushers 15 and two slides 16, with one pusher 15 and one slide 16 forming a set, corresponding to two breakpoint positions respectively. Since the pushers 15 and slides 16 have the same structure, only one set of structures is described in this embodiment.

[0049] A pusher 15 is connected to the movable contact disk 12. When the movable contact disk 12 rotates, the pusher 15 rotates along with it. The pusher 15 rotates relative to the movable contact disk 12, specifically relative to its side. In this embodiment, there are two pushers 15, which have the same structure but differ in their installation positions.

[0050] The slide plate 16 slides relative to the moving contact plate 12. The slide plate 16 is linked with the pusher 15. When the pusher 15 rotates, it drives the slide plate 16 to move. In this embodiment, there are also two slide plates 16. The two slide plates 16 have the same structure, but the difference lies in their installation positions.

[0051] When the movable contact plate 12 rotates, the pusher 15 engages with the groove 112. When the pusher 15 abuts against the groove 112, the pusher 15 will rotate, and the rotation of the pusher 15 will drive the slide plate 16 to move.

[0052] The rotation of the moving contact plate 12 connects or disconnects the moving contact assembly 13 from the stationary contact 14, achieving the opening and closing effect. Simultaneously, the rotation of the moving contact plate 12 causes the groove 112 to engage with the pusher 15, causing the pusher 15 to rotate relative to the moving contact plate 12. The rotation of the pusher 15 drives the slide plate 16, which is positioned between the moving contact assembly 13 and the stationary contact 14, achieving the effect of cutting off, isolating, and extinguishing the arc. Conversely, if the pusher 15 rotates in the opposite direction, it will also drive the slide plate 16, achieving a direct drive effect. This structure eliminates the need for an elastic energy storage device; the reciprocating motion of the slide plate 16 is achieved solely through mechanical connection, effectively increasing the arc length and improving the arc extinguishing effect.

[0053] Specifically, as shown in the attached document Figures 3-7As shown, the pusher 15 has at least two first legs and a second leg 154. The first legs mate with the groove 112. In this embodiment, the pusher 15 also includes a fixing part 155. The first legs and the second legs 154 are respectively connected to the outer wall of the fixing part 155, forming a radially outward extending structure. The first legs are used to mate with the groove 112. Here, the number of first legs can be adjusted according to actual needs; it can be one, two, three, or even more. When the number of first legs is one, the groove 112 needs to be equipped with corresponding features to mate with the first legs, so as to achieve the effect of driving the first legs to move, such as a stepped surface. In this embodiment, three first legs are used as an example for description. For better description, the three first legs are first leg I 151, first leg II 152, and first leg III 153. For example, during the opening operation, first leg I 151 and first leg II 152 extend to two adjacent grooves 112 respectively. When the moving contact plate 12 rotates, first leg I 151 moves to the middle of the groove 112, and first leg II 152 moves out of the adjacent groove 112 and continues to rotate until first leg III 153 moves into the groove 112 adjacent to the other side, forming a structure that rotates with the gear. At the same time, second leg 154 cooperates with slide plate 16. Second leg 154 drives slide plate 16 to move, so that slide plate 16 moves between moving contact assembly 13 and stationary contact 14, achieving the effect of cutting off the arc. When rotating in the opposite direction, slide plate 16 will not interfere with the cooperation between moving contact assembly 13 and stationary contact 14 after moving. By having multiple first legs engage with grooves 112 and second legs 154 engage with the slide plate 16, relative movement is formed between the housing 11 and the pusher 15, thereby achieving the effect of the pusher 15 driving the slide plate 16 to move.

[0054] Specifically, as shown in the attached document Figures 3-7 As shown, the slide plate 16 has a groove 161, and the second support leg 154 slides relative to the groove 161. Here, the groove 161 is vertically positioned, and one end of the second support leg 154 slides on the groove 161. During this sliding process, an oblique force is generated, which drives the slide plate 16 to move. The groove 161 and the second support leg 154 cooperate to form a guiding effect. Simultaneously, when the second support leg 154 abuts against the side wall of the groove 161, it also drives the slide plate 16 to move. Alternatively, the second support leg 154 can be a flexible connection structure to create a linkage effect between the pusher 15 and the slide plate 16, or a hinged structure can be used for connection.

[0055] Specifically, as shown in the attached document Figures 3-7As shown, the moving contact plate 12 is provided with a guide rail groove 121, and the slide plate 16 slides on the guide rail groove 121. The slide plate 16 slides on the guide rail groove 121, forming a guiding effect, making the slide plate 16 slide more smoothly. In this embodiment, the slide plate 16 has two positions in different states. One position is to cut off the connection between the moving contact assembly 13 and the stationary contact 14. That is, during the opening operation, when the moving contact plate 12 rotates to separate the moving contact assembly 13 and the stationary contact 14, the slide plate 16 moves at the same time, so that the slide plate 16 is located between the moving contact assembly 13 and the stationary contact 14, forming the effect of blocking the electric arc and guiding the electric arc. The other position is the avoidance position. That is, during the closing operation, when the moving contact plate 12 rotates to achieve the closing effect, the slide plate 16 will avoid the circuit in advance to prevent the slide plate 16 from interfering with the electrical connection between the moving contact assembly 13 and the stationary contact 14.

[0056] Specifically, as shown in the attached document Figure 8 As shown, the groove 112 can be disposed on the top surface of the inner wall of the receiving cavity 111, or it can be disposed on the bottom surface of the inner wall of the receiving cavity 111. Those skilled in the art can adjust this according to actual needs. Furthermore, the number of grooves 112 can also be adjusted according to actual needs.

[0057] Specifically, as shown in the attached document Figures 3-7 As shown, one of the sidewalls of the guide rail groove 121 and the slide plate 16 is provided with a limiting protrusion 17, and the other of the sidewalls of the guide rail groove 121 and the slide plate 16 is provided with a limiting protrusion 18 that cooperates with the limiting protrusion 17. The limiting protrusion 17 and the limiting protrusion 18 cooperate to form a limiting effect, preventing the position of the slide plate 16 from shifting. In this embodiment, the limiting protrusion 17 and the limiting protrusion 18 form a limiting position in the vertical direction of the moving contact plate 12.

[0058] Specifically, the moving contact plate 12 is provided with a limiting surface 122, which cooperates with the stationary contact 14. The limiting surface 122 is provided to create a limiting effect and prevent excessive rotation. In this embodiment, the limiting surface 122 is provided on the side wall of the guide rail groove 121.

[0059] Specifically, as shown in the attached document Figures 3-7As shown, the moving contact plate 12 has two fixing posts 123 on its side, each corresponding to one of the two pushing members 15. Each fixing post 123 has a limiting lug 124. Each pushing member 15 has a through hole 156 and a notch 157. The through hole 156 and the notch 157 are located in the fixing part 155. The notch 157 communicates with the through hole 156. The through hole 156 engages with the fixing post 123, and the notch 157 engages with the limiting lug 124. The limiting lug 124 provides a limiting effect, preventing the pushing member 15 from falling off. During installation, the pusher 15 initially aligns the notch 157 with the limiting lug 124, allowing it to slide along the axial direction of the fixed post 123 towards the movable contact plate 12. Once the notch 157 passes the limiting lug 124, the pusher 15 rotates radially along the fixed post 123. At this point, the limiting lug 124 and the notch 157 no longer engage in the axial direction of the fixed post 123. The limiting lug 124 then acts as a limit on the pusher 15 in the axial direction, preventing axial sliding. It should also be noted that the engagement position of the limiting lug 124 and the notch 157 is not the same as other rotational positions of the pusher 15.

[0060] Specifically, as shown in the attached document Figures 3-7 As shown, it also includes arc-extinguishing grid plates 19, which are housed in the receiving cavity 111. Two sets of arc-extinguishing grid plates 19 are formed, each corresponding to one end of the moving contact assembly 13. The arc-extinguishing grid plates 19 are located on the movement trajectory of the moving contact assembly 13. The arc-extinguishing grid plates 19 provide an arc-extinguishing effect, and the sliding plate 16 also serves as a guide, facilitating the arc to more easily enter the arc-extinguishing grid plates 19. The number of arc-extinguishing grid plates 19 can be adjusted according to actual needs.

[0061] Specifically, as shown in the attached document Figure 2 As shown, the movable contact plate 12 is provided with a mating part 125, which extends through the housing 11 to the outside. A limiting part 113 is provided on the outer surface of the housing 11, located on the rotation trajectory of the mating part 125. The limiting part 113 provides a limiting effect, preventing excessive rotation. In this embodiment, the movable contact plate 12 lies flat in the receiving cavity 111, and the central axis of the movable contact plate 12 is perpendicular to the horizontal plane, which is equivalent to the Z-axis in three-dimensional space. It can also be considered that the movable contact plate 12 rotates around the Z-axis. The pushing member 15 rotates relative to the side of the movable contact plate 12, specifically rotating along the central axis of the fixed post 123 on the side of the movable contact plate 12. The sliding plate 16 slides along the guide groove 121 on the movable contact plate 12.

[0062] Specifically, the housing 11, the moving contact assembly 13, and the stationary contact 14 form a module. In this embodiment, this module is part of the disconnect switch. The disconnect switch also includes an operating mechanism, a handle, and several modules. The modules are stacked vertically, with the operating mechanism at the top. The moving contact plates 12 between two adjacent modules are linked together. The topmost module cooperates with the operating mechanism, and the handle cooperates with the operating mechanism. The operating mechanism drives the moving contact plates 12 in the module to rotate, thereby realizing the operation of the entire disconnect switch. This is prior art, so it is not described in detail in this embodiment.

[0063] Specifically, its working principle is as follows: when the moving contact plate 12 rotates, the moving contact plate 12 moves relative to the receiving cavity 111. At this time, the pushing member 15 also rotates relative to the receiving cavity 111 until the first support foot abuts against the groove 112, causing the pushing member 15 to also rotate. While the pushing member 15 rotates along the central axis of the moving contact plate 12, it also rotates relative to the fixed column 123. The second support foot 154 drives the sliding plate 16 to slide, forming the effect of the sliding plate 16 cutting off the electric arc or making way for avoidance.

[0064] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. An isolation arc-extinguishing structure, characterized in that, include, The housing (11) has a receiving cavity (111) and the inner wall of the receiving cavity (111) has a plurality of grooves (112); A movable contact plate (12) is housed in the receiving cavity (111) and rotates relative to the housing (11); a movable contact assembly (13) is fixed to the movable contact plate (12); Two stationary contacts (14) are housed in the receiving cavity (111) and each of the two stationary contacts (14) is engaged with the moving contact assembly (13). A pusher (15) is connected to the movable contact disk (12), and the pusher (15) rotates relative to the movable contact disk (12); A sliding plate (16) slides relative to the moving contact plate (12), and the sliding plate (16) is linked with the pusher (15); When the moving contact plate (12) rotates, the pusher (15) engages with the groove (112), and the rotation of the pusher (15) drives the slide plate (16) to move.

2. The isolation and arc-extinguishing structure according to claim 1, characterized in that, The pusher (15) is provided with at least two first legs and a second leg (154), the first legs engaging with the groove (112) and the second legs (154) engaging with the slide plate (16).

3. The isolation and arc-extinguishing structure according to claim 2, characterized in that, The slide plate (16) is provided with a groove (161), and the second foot (154) slides relative to the groove (161).

4. The isolation and arc-extinguishing structure according to claim 1, characterized in that, The movable contact plate (12) is provided with a guide rail groove (121), and the slide plate (16) slides on the guide rail groove (121).

5. The isolation and arc-extinguishing structure according to claim 4, characterized in that, One of the sidewall of the guide rail groove (121) and the slide plate (16) is provided with a limiting protrusion (17), and the other of the sidewall of the guide rail groove (121) and the slide plate (16) is provided with a limiting protrusion (18) that cooperates with the limiting protrusion (17).

6. The isolation and arc-extinguishing structure according to claim 1, characterized in that, The moving contact plate (12) is provided with a limiting surface (122), which cooperates with the stationary contact (14).

7. The isolation and arc-extinguishing structure according to claim 1, characterized in that, The moving contact plate (12) has a fixing post (123) on its side. The fixing post (123) has a limiting lug (124). The pushing member (15) has a through hole (156) and a notch (157). The notch (157) communicates with the through hole (156). The through hole (156) cooperates with the fixing post (123). The notch (157) cooperates with the limiting lug (124).

8. The isolation and arc-extinguishing structure according to claim 1, characterized in that, It also includes an arc-extinguishing grid (19), which is housed in the receiving cavity (111) and is located on the movement trajectory of the moving contact assembly (13).

9. The isolation and arc-extinguishing structure according to claim 1, characterized in that, The movable contact plate (12) is provided with a mating part (125), which extends through the housing (11) to the outside. The outer surface of the housing (11) is provided with a limiting part (113), which is located on the rotation trajectory of the mating part (125).

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