A disconnector

Abstract

The utility model discloses a structure is simpler, and the resistance is smaller in the process of opening and closing, and the hand feeling is good, and the isolator of electric etching layer is not easy to produce. Adopted technical scheme includes: casing, be located the terminal of wiring of casing both ends, rotatable setting handle in the casing upper end and rotatable first connecting rod of being located the handle lower extreme, wherein one terminal of wiring is equipped with static contact support in, the casing is equipped with movable contact support, and static contact support end part is equipped with static contact, and movable contact support front end is equipped with movable contact of on-off cooperation with static contact, and movable contact support is installed in the casing through the reset spring floating of lower end middle part, and movable contact support rear end is equipped with the long hole of longitudinal extension.

Description

Technical Field

[0001] This utility model belongs to the field of switches, and in particular relates to an isolating switch. Background Technology

[0002] A disconnector switch (commonly known as a "knife switch") is a switching device that, when open, has an insulation distance between its contacts that meets the specified requirements and a clear disconnection mark; when closed, it can carry current under normal circuit conditions and current under abnormal conditions (such as short circuits) within a specified time. Traditional disconnector switch structures, such as those shown in the authorization announcement number "CN 213691855U" entitled "A Fast Closing Mechanism for a Disconnector Switch and a Disconnector Switch," not only have a very complex closing mechanism, but also require the connecting rod end to connect to the sliding groove of the housing after connecting to the moving contact bracket, resulting in limited freedom of movement. This leads to greater resistance or jamming during opening and closing, and the frontal pressure between the contacts easily generates an electro-corrosion layer, causing poor contact. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a disconnecting switch with a simpler structure, less resistance during opening and closing, better feel, and less prone to producing an electro-corrosion layer.

[0004] To solve the above problems, the technical solution adopted by this utility model includes: a housing, terminals at both ends of the housing, a handle rotatably disposed at the upper end of the housing, and a first connecting rod rotatably disposed at the lower end of the handle. A stationary contact bracket is provided inside one of the terminals, and a moving contact bracket is provided inside the housing. A stationary contact is provided at the end of the stationary contact bracket, and a moving contact is provided at the front end of the moving contact bracket to engage with the stationary contact. The moving contact bracket is floatingly mounted inside the housing via a return spring at its lower center. The rear end of the moving contact bracket has a longitudinally extending elongated hole, and the upper end has a first shaft hole corresponding to the space between the moving contact and the return spring. A first rotating shaft extends into the elongated hole inside the housing, and the other end of the first connecting rod is axially connected to the first shaft hole. When the handle is rotated, the moving contact bracket can rotate along the first rotating shaft and move up and down along the elongated hole.

[0005] The upper end of the moving contact bracket is provided with a second shaft hole corresponding to the first shaft hole and the reset spring. A second connecting rod is connected through the second shaft hole. The upper end of the housing is connected to a crank arm through a second rotating shaft. The lower end of the crank arm is connected to the second connecting rod, and the upper end is provided with a circuit breaker indicator.

[0006] The housing is provided with a spring positioning groove, the reset spring is installed in the spring positioning groove, and the lower end of the moving contact bracket is provided with a spring positioning post, the reset spring is connected to the spring positioning post.

[0007] The housing includes a base and a top cover, and the base and the top cover are provided with opposing positioning plates near the moving contact side. A "U"-shaped positioning groove is provided between the positioning plates, and the moving contact bracket moves within the "U"-shaped positioning groove.

[0008] Another terminal block is provided inside, and a flexible connecting wire is welded between the terminal block and the moving contact bracket.

[0009] The handle can rotate within a 90-degree angle range, and a third shaft hole is provided at the lower end at a 25-degree angle with its center line. The upper end of the first connecting rod is connected to the third shaft hole.

[0010] The upper end of the housing is provided with a lock hole, and the upper ends of the handle are provided with lock grooves on both sides that cooperate with the lock hole.

[0011] The upper side of the housing is provided with a positioning rib for positioning the opening and closing indicator.

[0012] A positioning post is provided between the base and the top cover, and the moving contact bracket and the first rotating shaft are located between the positioning post.

[0013] The first shaft hole includes an upper first shaft hole, a lower first shaft hole, and an inclined transition shaft hole connecting the upper first shaft hole and the lower first shaft hole.

[0014] The advantages of this disconnecting switch are as follows: 1. The overall structure is simple, and because the moving contact bracket is floatingly installed in the housing, it has a large degree of freedom and low resistance during the opening and closing process, and is not easy to jam; 2. After the moving contact and the stationary contact are closed face to face, there is also lateral sliding, which can effectively remove the surface electro-corrosion layer and extend the service life of the switch.

[0015] The present invention will be further described below with reference to the accompanying drawings. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the disconnecting switch of the present invention, showing the open state;

[0017] Figure 2 This is a schematic diagram of the disconnecting switch according to the present invention, showing the closed state;

[0018] Figure 3 This is a cross-sectional view of the disconnecting switch of this utility model, showing the structure of the positioning plate;

[0019] Figure 4 This is a cross-sectional view of the disconnecting switch of this utility model, showing the positioning post structure;

[0020] Figure 5This is a schematic diagram of the structure of the moving contact bracket of this utility model.

[0021] Figure 6 This is a schematic diagram of the structure of the first connecting rod of this utility model;

[0022] Figure 7 This is a schematic diagram of the handle of this utility model;

[0023] Figure 8 This is a schematic diagram of the contact bracket structure of the second embodiment of this utility model;

[0024] Figure 9 This is a schematic diagram of the disconnecting switch according to the second embodiment of this utility model, showing the closed state; Detailed Implementation

[0025] Reference Figure 1-9 As shown, the disconnecting switch of this utility model includes a housing 1, terminals 2 disposed at both ends of the housing 1, a handle 3 rotatably disposed at the upper end of the housing 1, and a first connecting rod 4 rotatably disposed at the lower end of the handle 3. The terminals 2 typically consist of a wiring frame and a wiring screw disposed on the wiring frame. One of the terminals 2 has a stationary contact bracket 5, and the housing 1 has a moving contact bracket 6. The stationary contact bracket 5 has a stationary contact 7 at its end, and the moving contact bracket 6 has a moving contact 8 at its front end that engages with the stationary contact 7 for switching. The moving contact bracket 6 is floatingly mounted in the housing 1 via a return spring 9 at its lower center, and the rear end of the moving contact bracket 6 has a longitudinally extending elongated hole 10. The upper end of the moving contact bracket 6 corresponds to a first shaft hole 11 between the moving contact 8 and the return spring 9. The housing 1 has a first rotating shaft 12 extending into the elongated hole 10. The other end of the first connecting rod 4 is axially connected to the first shaft hole 11 via a shaft portion 32. When the handle 3 is rotated, the moving contact bracket 6 can rotate along the first rotating shaft 12 and move up and down along the elongated hole 10. Specifically, when the handle 3 is rotated from the open position to the closed position, the handle 3 first drives the first connecting rod 4 to press down, which in turn drives the moving contact bracket 6 to rotate around the first rotating shaft 12 towards the stationary contact 7 and move down along the elongated hole 10, thereby enabling the moving contact 8 to contact the stationary contact 7.

[0026] Preferably, the upper end of the moving contact bracket 6 has a second shaft hole 13 corresponding to the first shaft hole 11 and the return spring 9. A second connecting rod 14 is connected through the second shaft hole 13. A crank arm 16 is pivotally connected to the upper end of the housing 1 via a second rotating shaft 15. The lower end of the crank arm 16 is pivotally connected to the second connecting rod 14. The upper end of the crank arm 16 has an opening / closing indicator 17. When the handle 3 is rotated from the open position to the closed position, the rotation of the moving contact bracket 6 can drive the linkage between the second connecting rod 14 and the crank arm 16, thereby moving the closing indicator (usually a red indicator surface) on the opening / closing indicator 17 to the opening / closing observation window of the housing 1 to achieve opening / closing indication.

[0027] Preferably, the housing 1 has a spring positioning groove 18, the return spring 9 is installed in the spring positioning groove 18, and the moving contact bracket 6 has a spring positioning post 19 at the lower center, with the return spring 9 connected to the spring positioning post 19. This improves the stability of the return spring 9 installation.

[0028] Preferably, the housing 1 includes a base 20 and a top cover 21, and the base 20 and the top cover 21 are provided with opposing positioning plates 22 near the moving contact 8. A "U"-shaped positioning groove 23 is provided between the positioning plates 22, and the moving contact support 6 moves within the "U"-shaped positioning groove 23 to improve the rotational stability of the moving contact support 6.

[0029] Preferably, another terminal block 2 is provided with a terminal block 24, and a flexible connecting wire 25 is welded between the terminal block 24 and the moving contact bracket 6. The connection is made through the flexible connecting wire 25, so that the movement of the moving contact bracket 6 is not restricted.

[0030] Preferably, the handle 3 rotates within a 90-degree angle range, and a third shaft hole 27 is provided at a position where the lower end of the handle 3 forms a 25-degree angle with its center line 26. The upper end of the first connecting rod 4 is pivotally connected to the third shaft hole 27 via a shaft portion 32. This structure achieves the optimal opening and closing distance.

[0031] Preferably, the upper end of the housing 1 is provided with a lock hole 28, and the upper ends of the handle 3 are provided with lock grooves 29 on both sides that cooperate with the lock hole 28. When the handle 3 is in the open / closed position, a switch lock can be installed in the lock hole 28 to lock the handle 3 and prevent accidental operation.

[0032] Preferably, a positioning rib 30 is provided on one side of the upper end of the housing 1 for positioning the opening / closing indicator 17. This is for positioning the opening / closing indicator 17 after it has been rotated into place.

[0033] Preferably, a positioning post 31 is provided between the base 20 and the upper cover 21, and the moving contact bracket 6 and the first rotating shaft 12 are located between the positioning post 31. This further improves the rotational stability of the moving contact bracket 6.

[0034] Preferably, the first shaft hole 11 includes an upper first shaft hole 111, a lower first shaft hole 112, and an inclined transition shaft hole 113 connecting the upper first shaft hole 111 and the lower first shaft hole 112. When the moving contact support 6 is pressed downward by the first connecting rod 4, when the first rotating shaft 12 enters the upper first shaft hole 111 from the lower first shaft hole 112, the upper first shaft hole 111 is offset from the center line of the lower first shaft hole 112, thereby driving the moving contact support 6 to move laterally, so that after the moving contact and the stationary contact are closed face to face, there is still lateral sliding.

[0035] The foregoing is not intended to limit the present invention in any way. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed structure and technical content to create equivalent embodiments without departing from the scope of the present invention. However, any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A disconnecting switch, comprising a housing (1), terminals (2) disposed at both ends of the housing (1), a handle (3) rotatably disposed at the upper end of the housing (1), a first connecting rod (4) rotatably disposed at the lower end of the handle (3), and a moving contact bracket (6) disposed within the housing (1), wherein a stationary contact bracket (5) is disposed within one of the terminals (2), a stationary contact (7) is disposed at the end of the stationary contact bracket (5), and a moving contact (8) is disposed at the front end of the moving contact bracket (6) for switching with the stationary contact (7), characterized in that: The moving contact bracket (6) is floatingly installed in the housing (1) via a return spring (9) at the lower middle. The moving contact bracket (6) has a longitudinally extending elongated hole (10) at its rear end and a first shaft hole (11) at its upper end corresponding to the moving contact (8) and the return spring (9). The housing (1) has a first rotating shaft (12) extending into the elongated hole (10). The other end of the first connecting rod (4) is axially connected to the first shaft hole (11). When the handle (3) is rotated, the moving contact bracket (6) can rotate along the first rotating shaft (12) and move up and down along the elongated hole (10).

2. The disconnecting switch according to claim 1, characterized in that: The upper end of the moving contact bracket (6) is provided with a second shaft hole (13) between the first shaft hole (11) and the reset spring (9). A second connecting rod (14) is connected through the second shaft hole (13). A crank arm (16) is axially connected to the upper end of the housing (1) through a second rotating shaft (15). The lower end of the crank arm (16) is axially connected to the second connecting rod (14), and the upper end is provided with a circuit breaker indicator (17).

3. The disconnecting switch according to claim 1, characterized in that: The housing (1) is provided with a spring positioning groove (18), the reset spring (9) is installed in the spring positioning groove (18), the lower middle part of the moving contact bracket (6) is provided with a spring positioning post (19), and the upper end of the reset spring (9) is connected to the spring positioning post (19).

4. The disconnecting switch according to claim 1, characterized in that: The housing (1) includes a base (20) and a top cover (21), and the base (20) and the top cover (21) are provided with opposing positioning plates (22) near the moving contact (8). A "U"-shaped positioning groove (23) is provided between the positioning plates (22), and the moving contact bracket (6) moves within the "U"-shaped positioning groove (23).

5. The disconnecting switch according to claim 1, characterized in that: Another terminal block (2) is provided with a terminal block (24), and a flexible connecting wire (25) is welded between the terminal block (24) and the moving contact bracket (6).

6. The disconnecting switch according to claim 1, characterized in that: The handle (3) rotates within a 90-degree angle range and a third shaft hole (27) is provided at the position where the lower end forms a 25-degree angle with its center line (26). The upper end of the first connecting rod (4) is connected to the third shaft hole (27).

7. The disconnecting switch according to claim 1, characterized in that: The upper end of the housing (1) is provided with a lock hole (28), and the upper ends of the handle (3) are provided with lock grooves (29) that cooperate with the lock hole (28).

8. The disconnecting switch according to claim 2, characterized in that: The upper side of the housing (1) is provided with a positioning rib (30) for positioning the opening and closing indicator (17).

9. The disconnecting switch according to claim 4, characterized in that: A positioning post (31) is provided between the base (20) and the top cover (21) and is disposed opposite to each other. The moving contact bracket (6) and the first rotating shaft (12) are disposed between the positioning post (31).

10. The disconnecting switch according to claim 1, characterized in that: The first shaft hole (11) includes an upper first shaft hole (111), a lower first shaft hole (112), and an inclined transition shaft hole (113) connecting the upper first shaft hole (111) and the lower first shaft hole (112).

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