CN220253082U

CN220253082U - DC switch

Info

Publication number: CN220253082U
Application number: CN202320493547.4U
Authority: CN
Inventors: 卢科军; 郭绍军; 杨艳群; 周长青; 付浩; 王远; 张世鹏; 郭雨扬; 钱军
Original assignee: Noark Electrics Shanghai Co Ltd; Delphi Electrical Centers Shanghai Co Ltd
Current assignee: Noark Electrics Shanghai Co Ltd; Delphi Electrical Centers Shanghai Co Ltd
Priority date: 2023-03-14
Filing date: 2023-03-14
Publication date: 2023-12-26
Anticipated expiration: 2033-03-14

Abstract

The utility model provides a direct current switch, includes the casing and sets up contact support and two stationary contacts in the casing, two stationary contacts include contact portion and wiring portion that set up relatively respectively to and connect the connecting portion between contact portion and wiring portion respectively, be equipped with the moving contact on the contact support, the contact support can drive the moving contact rectilinear movement, makes the both ends of moving contact with the contact portion of two stationary contacts respectively and separate, is equipped with on two stationary contacts and dodges the mouth respectively, the both ends of moving contact stretch to between wiring portion and the contact portion of two stationary contacts from dodging the mouth respectively, still are equipped with the baffle in the casing, the baffle is equipped with and stretches to insulating board between two stationary contacts, and the spring is connected with the baffle and is moved to the direction that is close to the contact support with the insulating board of drive baffle, and the contact support drives the baffle and compress spring when driving the contact to the contact portion of stationary contact, has great opening and is equipped with the breakpoint that the baffle effectively separates both sides.

Description

DC switch

Technical Field

The utility model relates to the field of piezoelectric devices, in particular to a direct current switch.

Background

When the current direct current switch drives the arc barrier to move between the two fixed contacts through the moving contact, the arc between the two fixed contacts can be blocked through the arc barrier. However, the existing arc-shaped plate is usually arranged on the contact support, so that the contact support structure is complex, the processing difficulty is high, the cost is high, the contact support is also more heavy, the action is insensitive, the problems of clamping stagnation and the like are more likely to occur, and the service life is low. In addition, when the contact support is positioned between two fixed contacts, the arc-shield plate is difficult to insert deep between the two fixed contacts, and satisfactory protection effect is difficult to achieve.

Disclosure of Invention

The utility model aims to overcome at least one defect of the prior art and provide a direct current switch.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a direct current switch, includes the casing and sets up contact support and two stationary contacts in the casing, two stationary contacts include contact portion and wiring portion that set up relatively respectively to and connect the connecting portion between contact portion and wiring portion respectively, be equipped with the moving contact on the contact support, the contact support can drive the moving contact rectilinear movement, makes the both ends of moving contact with the contact portion of two stationary contacts respectively and separate, is equipped with on two stationary contacts and dodges the mouth respectively, the both ends of moving contact stretch to between wiring portion and the contact portion of two stationary contacts from dodging the mouth respectively, still are equipped with the baffle in the casing, the baffle is equipped with and stretches to insulation board between two stationary contacts, and the spring is connected with the baffle and is moved to the direction that is close to the contact support with the insulation board of drive baffle, and the contact support drives the baffle and compresses the spring when driving the moving contact to the contact portion of stationary contact.

Preferably, the contact support is provided with a sliding groove, the sliding groove is positioned between the two fixed contacts, and the insulating plate is inserted into the sliding groove to be in sliding fit.

Preferably, the side surface of the connecting part, which is close to the contact part, is provided with an insulating sheet, and the insulating sheet is provided with an avoidance groove for avoiding the moving contact.

Preferably, the static contacts are of a C-shaped structure, openings of the C-shaped structures of the two static contacts are arranged in a back-to-back mode, and the avoidance opening is a through hole or a notch arranged on the wiring portion.

Preferably, the static contact is of a C-shaped structure, and an opening of the C-shaped structure is used as an avoidance opening.

Preferably, the contact support comprises a sliding block structure arranged between the connecting parts of the two fixed contacts and a supporting structure arranged between the contact parts of the two fixed contacts, wherein the sliding block structure is provided with a sliding groove, the supporting structure is provided with two insertion structures respectively used for being inserted into the avoidance openings, the insertion structures are provided with second avoidance grooves used for avoiding the moving contacts, and the moving contacts penetrate through the second avoidance grooves and extend to the side surfaces of the contact parts.

Preferably, the baffle plate includes a driving part connected to the insulating plate, and the width of the driving part is greater than the width of the sliding groove.

Preferably, the driving part comprises a limiting plate connected with the insulating plate, the width of the limiting plate is larger than that of the sliding groove, the two sides of the insulating plate are respectively provided with a pressing surface, and the pressing surfaces can be pressed on a sliding block structure supported by the contact under the driving of the spring.

Preferably, the driving part comprises two guide plates which are oppositely arranged, and a limiting plate connected between the guide plates, a guide groove which is in sliding fit with the outer sides of the two guide plates is arranged in the shell, and the spring is inserted between the two guide plates to push the limiting plate.

Preferably, the insulating sheet comprises two first insulating parts arranged at intervals, and a second insulating part connected between one ends of the two first insulating parts, wherein an inverted U-shaped avoidance groove is formed between the second insulating part and the two first insulating parts in a surrounding mode, and the second insulating part and the two first insulating parts are respectively matched with the connecting part.

According to the direct current switch, the contact support is positioned between the two fixed contacts, two ends of the moving contact extend from the avoidance opening to the position between the wiring parts and the contact parts of the two fixed contacts respectively so as to increase the opening distance and improve the arc extinguishing effect, the baffle is arranged between the two fixed contacts and is used for separating break-point arcs on two sides, the baffle is not required to be arranged on the contact support, and the spring and the contact support are used for driving movement, so that the structure of the contact support is simplified, the weight of the contact support is reduced, the moving contact is driven to move by the contact support to be more flexible, and when the moving contact is required to be driven by the contact support to leave the fixed contact by the spring force of the baffle, the moving contact is driven by the contact support to leave the fixed contact more quickly, and damage of the moving contact and the fixed contact due to arcs is avoided.

In addition, the connecting portion is equipped with the insulating piece in the side that is close to the contact portion, and the insulating piece can play the effect that improves creepage distance.

Drawings

FIG. 1 is a schematic diagram of a DC switch of the present utility model;

FIG. 2 is an enlarged view of a portion of FIG. 1 in accordance with the present utility model;

FIG. 3 is a front view of FIG. 1 of the present utility model;

fig. 4 is a schematic structural view of a stationary contact according to a first embodiment of the present utility model;

fig. 5 is a schematic structural diagram of a stationary contact according to a second embodiment of the present utility model.

In the figure, 1, a shell; 2. a contact support; 3. a stationary contact; 4. a moving contact; 5. a baffle; 6. a spring; 7. an arc extinguishing chamber; 8. an insulating sheet; 21. a slider structure; 22. a pressure spring; 24. a sliding groove; 25. an insertion structure; 26. a second avoidance groove; 30. an avoidance port; 31. a contact portion; 32. a wiring section; 33. a connection part; 34. a threaded hole; 51. an insulating plate; 52. a limiting plate; 53. a compression surface; 54. a guide plate; 55. a guide groove; 80. an avoidance groove; 81. a first insulating portion; 82. a second insulating portion; 83. a third insulating portion; 84. and a fourth insulating portion.

Detailed Description

The following examples are given in connection with the accompanying drawings to further illustrate embodiments of the dc switch of the present utility model. The dc switch of the present utility model is not limited to the description of the following embodiments.

As shown in fig. 1-2, a direct current switch comprises a shell 1, a contact support 2 and two fixed contacts 3, wherein the contact support 2 and the two fixed contacts 3 are arranged in the shell 1, the two fixed contacts 3 respectively comprise a contact part 31 and a wiring part 32 which are oppositely arranged, and a connecting part 33 which is connected between the contact part 31 and the wiring part 32, the contact support 2 is provided with a movable contact 4, the contact support 2 can drive the movable contact 4 to move linearly, two ends of the movable contact 4 are respectively contacted with and separated from the contact part 31 of the two fixed contacts 3, the two fixed contacts 3 are respectively provided with a avoiding opening 30, two ends of the movable contact 4 respectively extend from the avoiding opening 30 to a position between the wiring part 32 and the contact part 31 of the two fixed contacts 3, a baffle 5 is also arranged in the shell 1, the baffle 5 is provided with an insulating plate 51 which extends between the two fixed contacts 3, the spring 6 and the baffle 5 are connected with the baffle 5, and the insulating plate 51 which drives the movable contact 4 to move towards the contact part 31 of the fixed contact support 2, and the baffle 5 is driven by the movable contact support 2 to move towards the contact part 31 of the fixed contact 3, and the spring 6 is compressed.

In the direct current switch of the embodiment, the contact support 2 is located between two fixed contacts, two ends of the moving contact 4 extend from the avoidance port 30 to a position between the wiring part 32 and the contact part 31 of the two fixed contacts 3 respectively so as to increase the opening distance and improve the arc extinguishing effect, a baffle 5 is arranged between the two fixed contacts 3 and used for separating break-point arcs on two sides, the baffle 5 is not required to be arranged on the contact support 2, and the spring 6 and the contact support 2 are used for driving movement, so that the structure of the contact support 2 can be simplified, the weight of the contact support 2 is reduced, the moving contact 4 is driven to move by the contact support 2 more flexibly, and when the moving contact 4 is required to be driven by the contact support 2 to leave the fixed contact 3, the moving contact 4 is driven by the contact support 2 to leave the fixed contact 3 more quickly through the elastic force of the baffle 5, and damage caused by arcs is avoided by the moving contact 4 and the fixed contact 3.

As shown in fig. 1-2, a moving contact 4, two fixed contacts 3 and two arc extinguishing chambers 7 are arranged in a shell 1, the moving contact 4 is arranged on a contact support 2, and the contact support 2 is arranged in the shell 1 in a sliding manner and can drive the moving contact 4 to move linearly. The two ends of the shell 1 are provided with the two arc-extinguishing chambers 7, the moving contact 4 and the two fixed contacts 3 are arranged in the middle of the shell 1, the two fixed contacts 3 are positioned between the two arc-extinguishing chambers 7, the two arc-extinguishing chambers 7 are respectively matched with the two ends of the moving contact 4, the two ends of the moving contact 4 and the two fixed contacts 3 are respectively provided with an arc striking structure extending to the corresponding arc-extinguishing chambers 7, when the two ends of the moving contact 4 are contacted with the contact parts 31 of the two fixed contacts 3, the two contact connected loops can be conducted, the wiring parts 32 of the two fixed contacts 3 extend out of the shell 1 for wiring, when the two ends of the moving contact 4 are separated from the two fixed contacts 3, the two fixed contacts 3 connected loops can be disconnected, meanwhile, an electric arc between the moving contact 4 and the fixed contacts 3 can be attracted into the arc-extinguishing chambers 7 by the arc striking structure, and then discharged after being extinguished by the arc-extinguishing chambers 7. The contact support 2 is internally provided with a support groove, the moving contact 4 is movably arranged in the support groove, the support groove is internally provided with a pressure spring 22 connected with the moving contact 4, and the pressure spring 22 is used for pushing the moving contact 4 to be pressed on the fixed contact 3, so that the effect of improving the pressing force is achieved. Of course, when the moving contact 4 is separated from the fixed contact 3, the pressure spring 22 can drive the moving contact 4 to be pressed on the contact support 2 for limiting.

The shell 1 is internally provided with a baffle plate 5 and a spring 6, the baffle plate 5 is arranged between the two fixed contacts 3 in a sliding manner and is used for separating breaking arcs at two sides, the baffle plate 5 is provided with an insulating plate 51 extending between the two fixed contacts 3, and the spring 6 drives the baffle plate 5 to move towards a direction close to the contact support 2 and prop against the contact support 2. When the switch is closed, the contact support 2 drives the moving contact 4 to contact with the fixed contact 3, and drives the baffle 5 and compresses the spring 6; when the switch is opened, the contact support 2 drives the moving contact 4 to be separated from the fixed contact 3, and the spring 6 drives the baffle 5 to move towards the contact support 2.

Preferably, the contact support 2 is provided with a sliding groove 24, the sliding groove 24 is positioned between the two fixed contacts 3, and the insulating plate 51 is inserted into the sliding groove 24 to be in sliding fit. As shown in fig. 1-2, the contact support 2 includes a sliding block structure 21 and a supporting structure disposed on a side surface of the sliding block structure 21, a sliding groove 24 is disposed on the sliding block structure 21, the insulating plates 51 are respectively inserted into the sliding groove 24, the insulating plates 51 can be avoided through the sliding groove 24, the insulating plates 51 can be inserted between the two fixed contacts 3 more deeply, a better insulating effect is achieved, and the sliding plates can be slidably matched with the insulating plates 51 through the sliding groove 24, so that the functions of guiding and positioning the movement of the baffle 5 are achieved. The contact support 2 is characterized in that two insertion structures 25 which are respectively inserted into avoidance ports 30 of two fixed contacts 3 are arranged on a supporting structure, a second avoidance groove 26 for avoiding the moving contact 4 is arranged in the insertion structure 25, the moving contact 4 penetrates through the second avoidance groove 26 to extend to the side face of the contact part 31, silver points for contacting the fixed contacts 3 are respectively arranged at two ends of the moving contact 4, and the supporting structure can be used for positioning the two fixed contacts 3.

Further, the shutter 5 includes a driving portion connected to the insulating plate 51, the driving portion having a width larger than that of the sliding groove 24, and the driving portion is blocked outside the sliding groove 24 and pressed against the slider structure 21 when the insulating plate 51 is inserted into the sliding groove 24.

Specifically, the driving portion includes a limiting plate 52 connected to the insulating plate 51, where the width of the limiting plate 52 is greater than the width of the sliding groove 24 and greater than the width of the insulating plate 51, the limiting plate 52 is provided with compression surfaces 53 on two sides of the insulating plate 51, and when the insulating plate 51 of the baffle 5 is inserted into the sliding groove 24 of the contact support 2 under the driving of the spring 6, the limiting plate 52 is blocked outside the sliding groove 24, and the compression surfaces 53 can be compressed on the sliding block structure 21 of the contact support 2 under the driving of the spring 6.

Further, the driving part is in a U-shaped structure, the driving part comprises two guide plates 54 which are oppositely arranged, and a limiting plate 52 which is connected between the guide plates 54, a guide groove 55 which is in sliding fit with the outer sides of the two guide plates 54 is formed in the shell 1, the spring 6 can be inserted between the two guide plates 54 and propped against the side surface, far away from the contact support 2, of the limiting plate 52, the spring 6 pushes the limiting plate 52 to move towards the contact support 2, and a compression limiting surface 53 on the other side of the limiting plate 52 is compressed on the contact support 2. The guide groove 55 on the shell 1 can play a role in guiding and positioning the movement of the baffle 5, and the two guide plates 54 also limit the spring 6.

As shown in fig. 1 and 4, the two static contacts 3 respectively include a contact portion 31 and a connection portion 32 that are oppositely disposed, and a connection portion 33 that is connected between the respective contact portion 31 and connection portion 32, the static contacts 3 are approximately in a C-shaped structure, silver points are disposed on the contact portion 31, the connection portion 32 is provided with threaded holes 34 that are matched with connection screws, the connection screws are used for fixing wires with the connection portion 32, the side surface of the connection portion 33, which is close to the contact portion 31, is provided with an insulating sheet 8, the avoidance groove is used for avoiding the moving contact 4, and the insulating sheet 8 can have an effect of improving the creepage distance.

Further, the connection portion 33 is provided with an avoidance port 30, two ends of the moving contact 4 extend from the avoidance port 30 to a position between the connection portion 32 and the contact portion 31 of the two fixed contacts 3, in this embodiment, openings of C-shaped structures of the two fixed contacts 3 are arranged in opposite directions, the openings of the C-shaped structures face the arc extinguishing chambers 7 corresponding to each other, the avoidance port 30 is a through hole or a notch formed in the connection portion 32, the avoidance port 30 shown in fig. 4 is a through hole, and a notch can be formed in a side edge of the connection portion 32 as the avoidance port 30 in another similar embodiment.

Further, the connecting portion 33 is provided with an insulating sheet 8 on a side surface close to the contact portion 31, and the insulating sheet 8 is provided with a recess 80 for receiving the moving contact 4. The insulating sheet 8 is provided with an avoidance groove 80 for avoiding the moving contact 4.

As another embodiment of the stationary contact 3 shown in fig. 5, the stationary contact 3 includes a contact portion 31 and a connection portion 32, and a connection portion 33 connected between the respective contact portion 31 and connection portion 32, the stationary contact 3 has a substantially C-shaped structure, and the openings of the C-shaped structures of the two stationary contacts 3 are not disposed toward the arc extinguishing chamber 7 in fig. 3, but disposed toward the direction perpendicular to the paper surface in fig. 3, so that the connection portion 33 is disposed offset from the contact portion 31 and connection portion 32 in the direction perpendicular to the paper surface in fig. 3, corresponding to the opening of the connection portion 33 on the side close to the contact portion 31 and connection portion 32, i.e., the opening of the connection portion 33 on the side close to the contact portion 31 and connection portion 32 serves as the escape opening 30, and both ends of the movable contact 4 respectively pass through the openings of the C-shaped structures of the two stationary contacts 3 between the connection portion 32 and the contact portion 31.

Further, the insulating sheet 8 further includes a third insulating portion 83 mated with the contact portion 31, the third insulating portion 83 is connected to a fourth insulating portion 84, and the fourth insulating portion 84 is used for shielding a connection portion between the contact portion 31 and the connection portion 33.

Specifically, the insulating sheet 8 includes two first insulating portions 81 disposed at intervals, and a second insulating portion 82 connected between one ends of the two first insulating portions 81, and an inverted U-shaped escape groove 80 is enclosed between the second insulating portion 82 and the two first insulating portions 81, so as to facilitate assembly. The second insulating portion 82 and the two first insulating portions 81 are respectively matched with the connecting portion 33, one ends of the two first insulating portions 81 far away from the second insulating portion 82 are respectively connected with the third insulating portion 83 through the fourth insulating portion 84, the two third insulating portions 83 are vertically arranged with the first insulating portions 81, and the fourth insulating portion 84 is in a curved surface shape, has elasticity and is not easy to damage.

It should be noted that, in the description of the present utility model, the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate an orientation or a positional relationship based on that shown in the drawings or an orientation or a positional relationship conventionally put in use, and are merely for convenience of description, and do not indicate that the apparatus or element to be referred to must have a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating relative importance.

The foregoing is a further detailed description of the utility model in connection with the preferred embodiments, and it is not intended that the utility model be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the utility model, and these should be considered to be within the scope of the utility model.

Claims

1. The utility model provides a direct current switch, includes casing (1) and sets up contact support (2) and two stationary contacts (3) in casing (1), two stationary contacts (3) are including contact portion (31) and wiring portion (32) of relative setting respectively to and connect connecting portion (33) between contact portion (31) and wiring portion (32) respectively, be equipped with moving contact (4) on contact support (2), contact support (2) can drive moving contact (4) rectilinear movement, make the both ends of moving contact (4) contact and separate with contact portion (31) of two stationary contacts (3) respectively, its characterized in that: the two static contacts (3) are respectively provided with an avoidance port (30), two ends of the moving contact (4) extend from the avoidance ports (30) to between a wiring part (32) and a contact part (31) of the two static contacts (3), a baffle plate (5) is further arranged in the shell (1), the baffle plate (5) is provided with an insulating plate (51) extending between the two static contacts (3), a spring (6) is connected with the baffle plate (5) to drive the insulating plate (51) of the baffle plate (5) to move towards a direction close to the contact support (2), and the contact support (2) drives the moving contact (4) to move towards the contact part (31) of the static contact (3) and compress the spring (6).

2. The direct current switch of claim 1, wherein: the contact support (2) is provided with a sliding groove (24), the sliding groove (24) is positioned between the two fixed contacts (3), and the insulating plate (51) is inserted into the sliding groove (24) to be in sliding fit.

3. The direct current switch of claim 1, wherein: the connecting part (33) is provided with an insulating sheet (8) on the side surface close to the contact part (31), and an avoidance groove (80) for avoiding the moving contact (4) is formed in the insulating sheet (8).

4. The direct current switch of claim 1, wherein: the static contacts (3) are of C-shaped structures, openings of the C-shaped structures of the two static contacts (3) are arranged in a back-to-back mode, and the avoidance opening (30) is a through hole or a notch arranged on the wiring portion (32).

5. The direct current switch of claim 1, wherein: the static contact (3) is of a C-shaped structure, and an opening of the C-shaped structure is used as an avoidance opening (30).

6. A dc switch as claimed in any one of claims 1 to 5, wherein: the contact support (2) comprises a sliding block structure (21) arranged between connecting parts (33) of two fixed contacts (3) and a supporting structure arranged between contact parts (31) of the two fixed contacts (3), wherein the sliding block structure (21) is provided with a sliding groove (24), two inserting structures (25) respectively used for being inserted into the avoiding openings (30) are arranged on the supporting structure, a second avoiding groove (26) used for avoiding the moving contact (4) is arranged in the inserting structures (25), and the moving contact (4) penetrates through the second avoiding groove (26) to extend to the side face of the contact part (31).

7. The direct current switch of claim 2, wherein: the baffle (5) comprises a driving part connected with the insulating plate (51), and the width of the driving part is larger than that of the sliding groove (24).

8. The direct current switch of claim 7, wherein: the driving part comprises a limiting plate (52) connected with the insulating plate (51), the width of the limiting plate (52) is larger than that of the sliding groove (24), the two sides of the insulating plate (51) of the limiting plate (52) are respectively provided with a pressing surface (53), and the pressing surfaces (53) can be pressed on the sliding block structure (21) of the contact support (2) under the driving of the springs (6).

9. The direct current switch of claim 7, wherein: the driving part comprises two guide plates (54) which are oppositely arranged, and a limiting plate (52) connected between the guide plates (54), a guide groove (55) which is in sliding fit with the outer sides of the two guide plates (54) is formed in the shell (1), and the spring (6) is inserted between the two guide plates (54) to push the limiting plate (52).

10. A dc switch as claimed in claim 3, wherein: the insulating piece (8) comprises two first insulating parts (81) arranged at intervals, and a second insulating part (82) connected between one ends of the two first insulating parts (81), wherein an inverted U-shaped avoidance groove (80) is formed between the second insulating part (82) and the two first insulating parts (81), and the second insulating part (82) and the two first insulating parts (81) are respectively matched with the connecting part (33).