CN117936291A - Switch assembly and electrical equipment - Google Patents

Abstract

The present disclosure provides a switch assembly (10) and related electrical devices. The switch assembly (10) comprises: a stationary contact; a moving contact assembly (2) arranged to be pivotable via a moving contact shaft (24) and having a moving contact (20) and a driven slot (25); and a drive disc (3) arranged to be pivotable via a drive disc shaft (33) and provided with a drive lever (31) extending from a disc face of the drive disc (3) towards the driven groove (25); wherein the moving contact shaft (24) is arranged to be concentric with the drive disc shaft (33), and the driven groove (25) is arranged to: is suitable for being matched with a driving rod (31) so as to drive the moving contact to rotate around the moving contact shaft (24) under the driving of the driving rod (31) to realize the closing between the moving contact and the fixed contact.

Description

Switch assembly and electrical equipment

Technical Field

The present disclosure relates to the field of switches, and more particularly to a switch assembly and an electrical device including the same.

Background

Various types of switching devices exist on the market today for breaking and/or isolating ac/dc. In addition, with the rapid development of dc applications, there is also an increasing demand from the market for high voltage dc switches, especially in the case of dc voltage boosting. In some scenarios, the dc switch needs to be used for isolation protection in a line with a working voltage up to 1500V and a rated current up to 1000A, and realizes on-load breaking and effective isolation.

Disclosure of Invention

It is an object of the present disclosure to provide an improved switch assembly, which at least solves the technical problem of smaller rotation angle of the moving contact in the prior art.

According to a first aspect of the present disclosure, a switch assembly is provided. The switch assembly includes: a stationary contact; a movable contact assembly arranged to be pivotable via a movable contact shaft; the movable contact and the driven groove are arranged; and a drive disk arranged to be pivotable via a drive disk shaft and provided with a drive lever extending from a disk surface of the drive disk toward the driven groove; wherein the moving contact shaft is arranged non-concentric with the drive disc shaft and the driven slot is arranged to: the movable contact is suitable for being matched with the driving rod so as to drive the movable contact to rotate around the movable contact shaft under the driving of the driving rod, so that the switching-on between the movable contact and the fixed contact is realized.

It will be readily appreciated that with the switch designs of the present disclosure, particularly designs in which the moving contact shaft is not concentric with the drive plate shaft, this may allow the angle of rotation of the moving contact to be greater (or much greater) than the angle of rotation of the drive plate, thereby allowing sufficient clearance to accommodate more arc chute pieces within the switch structure, yet sufficient number of arc chute pieces may enable magnetic quenching without the need for permanent magnets.

In some embodiments, the drive rod, the drive disc shaft, and the moving contact shaft are parallel to each other, and the drive rod is spaced from the drive disc shaft a greater distance than the drive rod is spaced from the moving contact shaft throughout the full rotational travel of the drive rod.

In some embodiments, the fixed contacts include a first fixed contact and a second fixed contact, the first fixed contact and the second fixed contact are respectively disposed on opposite sides in an overall structure of the switch assembly, the moving contact has a first moving contact end and a second moving contact end symmetrically arranged about a moving contact axis, wherein the first moving contact end is capable of being closed with the first fixed contact and the second moving contact end is capable of being closed with the second fixed contact under the driving of the driving rod.

In some embodiments, the switch assembly further comprises: a housing positioned between the moving contact assembly and the drive plate, wherein the moving contact assembly is pivotably mounted to a first side of the housing via the moving contact shaft, and the drive plate is pivotably mounted to a second side of the housing via the drive plate shaft, wherein the first side and the second side are opposite each other.

In some embodiments, the switch assembly further comprises: and the first energy storage spring is arranged between the driving rod and the first energy storage spring fixed end positioned on the second side of the rack.

In some embodiments, the drive disk further comprises: and the energy storage spring release end is arranged on one side of the driving disc facing the rack, and the positions of the energy storage spring release end and the driving rod on the driving disc are axisymmetric with respect to the driving disc.

In some embodiments, the switch assembly further comprises: the second energy storage spring is arranged between the energy storage spring release end and the second energy storage spring fixing end positioned on the second side of the frame, and the positions of the first energy storage spring fixing end and the second energy storage spring fixing end on the frame are axisymmetric with respect to the driving disc.

In some embodiments, the housing further comprises a first limit slot, the drive rod being disposed within the first limit slot to rotate in an arcuate path.

In some embodiments, the power spring release end is in the form of a lever, and the housing further comprises a second limit slot, the power spring release end being arranged to: the driving rod rotates in an arc track in the first limit groove and simultaneously rotates in an arc track in the second limit groove, wherein the first limit groove and the second limit groove are axisymmetric relative to the driving disc.

In some embodiments, the first and second limit slots are both arcuate slots.

In some embodiments, the switch assembly further comprises: the arc extinguishing grid piece is positioned between the first fixed contact and the second fixed contact and distributed along the movement track of the first movable contact end and the second movable contact end.

In some embodiments, the movement tracks of the arc extinguishing gate sheet and the first moving contact end and the second moving contact end of the switch assembly are not overlapped.

In some embodiments, the first moving contact end and the second moving contact end of the switch assembly each comprise a first side and a second side opposite to each other, wherein during the movement of the closing, the first moving contact end and the second moving contact end establish electrical contact with the first stationary contact and the second stationary contact, respectively, via the respective first sides; wherein the moving contact assembly further comprises: an arc protection sleeve is disposed on the respective second sides of the first and second movable contact ends.

In some embodiments, the switch assembly is a dc load switch.

According to a second aspect of the present disclosure, an electrical device is provided. The electrical device comprises a switch assembly according to the first aspect described above.

It should also be appreciated that the descriptions in this summary are not intended to limit key or critical features of embodiments of the disclosure, nor are they intended to limit the scope of the disclosure. Other features of embodiments of the present disclosure will become apparent from the following description.

Drawings

The above and other features, advantages and aspects of embodiments of the present disclosure will become more apparent by reference to the following detailed description when taken in conjunction with the accompanying drawings. In the drawings, wherein like or similar reference numerals denote like or similar elements, in which:

fig. 1 shows a schematic top view of the main structure of a switch assembly according to an example embodiment of the present disclosure, wherein the switch assembly is in a closed state;

FIG. 2 illustrates another schematic top view of the primary structure of a switch assembly according to an example embodiment of the present disclosure, wherein the switch assembly is in a fully open state;

Fig. 3 illustrates an overall structural schematic diagram of a moving contact assembly according to an example embodiment of the present disclosure;

fig. 4 illustrates another top view structural schematic of a switch assembly according to an example embodiment of the present disclosure, wherein the chassis is shown transparent;

Fig. 5a shows a schematic view of a driving disc shaft, a moving contact shaft and a driving rod of the switch assembly in the complete opening state on a frame plane;

fig. 5b shows a schematic view of a driving disc shaft, a moving contact shaft and a driving rod of the switch assembly in a closed state on a plane of a rack;

fig. 6a to 6d respectively show schematic diagrams of movement trajectories of the driving disc shaft, the moving contact shaft and the driving rod from a complete opening state to a closing state when viewed from a plane of the frame; and

Fig. 7 shows a graph of the rotation angle of the moving contact of the present disclosure as a function of the rotation angle of the drive disk;

Detailed Description

Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present disclosure have been shown in the accompanying drawings, it is to be understood that the present disclosure may be embodied in various forms and should not be construed as limited to the embodiments set forth herein, but are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are for illustration purposes only and are not intended to limit the scope of the present disclosure.

As mentioned above, the market demand for high voltage dc switches is increasing. However, the inventors noted that: the existing switch still has some defects. Specifically, for example, due to the structural feature of irrelevant manual operations (i.e., the rotational speed of the contact at the moment of opening and closing is irrelevant to the speed of the manual operation mechanism), the angle by which the movable contact of a conventional switch can rotate is generally small, such as generally not more than 50 degrees. As another example, conventional dc switches typically employ permanent magnets to control the movement of the generated arc toward the arc chute to effect magnetic quenching. However, the strong magnetic field generated by the permanent magnets is prone to interference with the surrounding electronics, increasing the electromagnetic interference (EMC) risk of the system. In addition, when the permanent magnet is demagnetized due to the influence of high temperature (electric arc, current carrying and/or air temperature), the direct current breaking performance of the switch is lost, which forms a potential safety hazard.

To this end, the present disclosure proposes a novel switch assembly which can be used in particular as a direct current load switch, wherein the moving contact shaft of the present disclosure is designed to be non-concentric with the drive disc shaft to greatly expand the angle the moving contact can rotate, thereby allowing for providing sufficient opening distance within the switch structure to accommodate more arc extinguishing grids to achieve arc extinction, which makes possible magnetic quenching without the need for permanent magnets.

It should be noted here that, for convenience of description, the structure of the switch assembly of the present disclosure will be described herein mainly by taking a dc switch as an example, however, it will be understood that the switch assembly of the present disclosure is not limited to the application of the dc switch, and that it is possible to use as an electrical switch for other purposes including an ac switch.

Fig. 1 shows a schematic top view of the main structure of a switch assembly according to an example embodiment of the present disclosure, wherein the switch assembly is in a closed state; fig. 2 illustrates another top view structural schematic of the main structure of a switch assembly according to an example embodiment of the present disclosure, wherein the switch assembly is in a tripped state. And (3) injection: the drive plate and associated housing are omitted from fig. 2 for clarity of illustration of the structure of the moving and stationary contacts.

As shown in connection with fig. 1 and 2, the switch assembly 10 may mainly comprise a stationary contact 1, a moving contact assembly 2, a drive disc 3 and a frame 4, wherein the frame 4 may serve as a support for some electrical or mechanical components in the switch assembly 10.

In embodiments where the switch assembly 10 has a housing structure, the stationary contact 1, the movable contact assembly 2, the drive disc 3, and the housing 4 may all be housed within the housing structure of the switch assembly 10.

In particular, in a typical example of a switch assembly as a direct current load switch, the stationary contact 1 may include a first stationary contact 11 and a second stationary contact 12, which may be located at opposite sides within the overall structure of the entire switch assembly 1, and may be electrically connected with respective positive and negative terminals of an external power line. Accordingly, the moving contact assembly 2 may be disposed between both the first and second stationary contacts 11 and 12 and pivotally mounted to the first side of the frame 4 via the moving contact shaft 24. In some examples, the moving contact 20 in the moving contact assembly 2 may include a first moving contact end 21 and a second moving contact end 22, which may be symmetrically arranged about a moving contact axis 24.

The drive disc 3 may be pivotally mounted to the second side of the housing 4 via a drive disc shaft 33, which serves to drive the movable contact assembly 2 to pivot about the movable contact shaft 24. As will be further explained later, the movable contact assembly 2 may be driven to rotate under the driving of the driving disc 3, so that the first movable contact end 21 of the movable contact 20 may be closed or opened with the first stationary contact 11, and the second movable contact end 22 may be closed or opened with the second stationary contact 12, thereby achieving the closing or opening of the movable contact in the switch assembly 10.

For example, in the closed state of the switch assembly shown in fig. 1, the moving contact assembly 2 can rotate counterclockwise under the drive of the driving disc 3, so as to realize separation from the fixed contact 1; in the open state of the switch assembly shown in fig. 2, the movable contact assembly 2 can rotate clockwise under the drive of the drive disc 3 to realize electrical contact with the fixed contact 1.

To more clearly understand the principle by which the moving contact assembly 2 of the present disclosure is driven, fig. 3 shows an overall structural schematic diagram of the moving contact assembly according to an example embodiment of the present disclosure; and fig. 4 shows another schematic top view of a switch assembly according to an example embodiment of the present disclosure, wherein the chassis 4 is shown transparent.

As shown in fig. 3, the moving contact assembly 2 may include at least an insulating bracket 23, a moving contact 20, a driven groove 25, and a moving contact shaft hole 231. In some embodiments, the driven groove 25 and the moving contact shaft hole 241 may be commonly formed on the insulating bracket 23. Further, the moving contact shaft 24 described above may be installed in the moving contact shaft hole 231 on the moving contact assembly 2 and fixed to the first side of the frame 4.

Further, as shown in fig. 4, the drive disc 3 may comprise a drive rod 31, which drive rod 31 may extend, for example, from a disc surface of the drive disc 3 towards the driven groove 25 of the movable contact assembly 2 and further cooperate with the driven groove 25 (e.g. be inserted into the driven groove 25).

It will be appreciated that the driven slot 25 functions in: the whole moving contact assembly 2 rotates around the moving contact shaft 24 under the drive of the driving rod 31 of the driving disc 3 so as to realize the closing between the moving contact and the fixed contact.

In some embodiments, the switch assembly 10 may also include an arc chute sheet 5. As an example, the arc extinguishing gate 5 may be positioned between the first and second stationary contacts 11 and 12 and distributed along the movement trajectories of both the first and second movable contact ends 21 and 22. In some embodiments, the arc extinguishing gate 5 may not overlap with the movement trajectories of both the first movable contact end 21 and the second movable contact end 22. In still other embodiments, the arc extinguishing gate 5 may be a C-shaped gate, and both the first movable contact end 21 and the second movable contact end 22 may extend into the opening of the C-shaped gate.

In general, the switch assembly 2 of the present disclosure may also be designed to have an extraneous human-operated feature. To this end, in some embodiments, the switch assembly 2 may further have a first power spring 43 (see fig. 1), which first power spring 43 may be disposed between the driving rod 31 and the first power spring fixing end 41 located at the second side of the bracket 4. The first energy storage spring 43 has the following functions: the auxiliary switch assembly 2 is switched on and off, and in particular, the first storage spring 43 can store energy in the state in which the switch assembly 2 is switched on, in order to be ready for switching off.

In further embodiments, the drive disc 3 may also have a storage spring release end 32, which storage spring release end 32 may be provided on the side of the drive disc 3 facing the support 4. By way of example only, the storage spring release end 32 may also be shaped in the form of a rod and may extend parallel to one another with the drive rod 31. In particular, the positions of both the storage spring release end 32 and the drive rod 31 on the drive disk 3 may be arranged symmetrically with respect to the drive disk axis 24. It will be appreciated that the power spring release end 32 functions similarly to the drive rod 31, except that it does not cooperate with the driven slot 25 to drive the moving contact assembly 2.

In the embodiment having the above-described charge spring release end 32, the switch assembly 2 may further include a second charge spring 44 (see fig. 1), and the second charge spring 44 may be connected between the charge spring release end 32 and the second charge spring fixing end 41 disposed at the second side of the bracket 4. In particular, the positions of both the first and second power spring fixing ends 41, 42 on the above-mentioned bracket 4 are symmetrical about the drive disc shaft 33. With the above symmetrical arrangement, the rotation of the driving disk 3 can be made smoother, thereby achieving switching on and off of the switching element more stably.

For example only, the first storage spring 43 and the second storage spring 44 may be compression springs.

In some embodiments, in cooperation with the drive rod 31, the bracket 4 may also be provided with a first limit groove 45, which first limit groove 45 may be designed to allow the drive rod 31 to be arranged to rotate in an arcuate path within said first limit groove. At the same time, the first limiting groove 45 can also limit the movement of the driving rod.

In still other embodiments, the bracket 4 may also be provided with a second limit groove 46 in cooperation with the power spring release end 32, which second limit groove 46 may be designed to allow the power spring release end 32 to be arranged to rotate in an arcuate path within said second limit groove 46. Similarly, the second limiting groove 45 may also limit the movement of the power spring release end 32.

For example only, the first and second limiting grooves 45 and 45 may each be in the shape of an arc-shaped groove.

According to the design of the present disclosure, as shown in fig. 4, the moving contact shaft 24 may be designed to be non-concentric with the drive disc shaft 32. In particular, in some embodiments, the distance of the drive rod 31 from the drive disc shaft 33 is greater (or much greater) than the distance of the drive rod 31 from the moving contact shaft 24 throughout the entire pivot travel of the drive rod 31. It will be appreciated that in this way, the angle of rotation of the moving contact 20 can advantageously be made greater (or much greater) than the angle of rotation of the drive disk 3. For example, the rotation angle of the driving disk 3 may be 50 degrees or less, and the rotation angle of the moving contact 20 may be 70 degrees, 80 degrees, 90 degrees, 100 degrees, or 130 degrees or more.

In such a design, the switch assembly 10 of the present disclosure may be made to provide a substantial opening distance, while a sufficiently large opening distance may in turn allow for a sufficient number of arc chute sheets 3 to be arranged in the switch assembly 10 of the present disclosure. Further, arranging a sufficient number of arc chute sheets 3 may in turn make it possible for the switch assembly 10 of the present disclosure to be equipped with no permanent magnets. Of course, in alternative embodiments, it is also possible to provide permanent magnets in the switch assembly 10 of the present disclosure to better perform arc extinction.

The principle of the above-described design of the present disclosure will be explained in more detail below with reference to fig. 5a to 6 d. Specifically, fig. 5a shows a schematic view of the driving disc shaft 33, the moving contact shaft 24 and the driving rod 31 of the switch assembly of the present disclosure in a frame plane in a completely opened state; fig. 5b shows a schematic view of the driving disc shaft 33, the moving contact shaft 24 and the driving rod 31 of the switch assembly of the present disclosure in a closed state on a plane of the frame; fig. 6a to 6d show the movement path diagrams of the drive shaft 33, the movable contact shaft 24 and the drive rod 31 from the completely opened state to the closed state, respectively, as seen from the plane of the machine frame, wherein fig. 6a corresponds to the completely opened state and fig. 6b corresponds to the closed state.

In connection with fig. 5a to 6d, it will be understood that, in the process of moving the moving contact from the completely opened state to the closed state, the driving rod 31 will be driven to rotate clockwise about the driving disc shaft 33 (the energy storage spring releasing end 32 will rotate synchronously therewith) under the action of external force, and at this time, the first energy storage spring 43 between the driving rod 31 and the first energy storage spring fixing end 41 will be compressed first. Subsequently, the drive rod 31 will be brought into a position in line with the three points of the drive disc shaft 33 and the first storage spring fixing end 41, i.e. the dead point of the mechanism (at which point the mechanism is at an unstable force balance point and the first storage spring 43 and the second storage spring 44 if present will be compressed maximally). Thereafter, as the external force continues to drive the drive rod 31 and the drive is removed at a later time, the first power spring 43 (and possibly the second power spring 44) will release energy and continue to rotate the drive rod 31 clockwise and reach the end of the release energy (i.e., the rest of the housing 4). It will be appreciated that during the entire movement, the drive rod 31 will drive the moving contact assembly relatively quickly from the beginning (as in the process of fig. 6a to 6 b) to rotate, due to the moment, and will transition to drive the moving contact assembly relatively slowly (as in the process of fig. 6c to 6 d). This is advantageous for the case of closing a switch, in which it is desirable to relatively smoothly overcome the closing resistance of the moving and static contacts (the process from fig. 6c to fig. 6 d).

Further, from the movement trajectories of both the connection line 63 between the driving lever 31 and the moving contact shaft 24 and the connection line 64 between the driving lever 31 and the driving disc shaft 33 depicted in fig. 6a to 6d, it can be seen that the rotation angle of the connection line 63 is much larger than the rotation angle of the connection line 64. It can also be appreciated that since the moving contact 20 (in particular, the first moving contact end 21) in the moving contact assembly 2 is in the direction of the connection line 63, this means: the rotation angle of the movable contact 20 may be larger (or much larger) than the rotation angle of the driving disk 3 as the driving disk 3 rotates.

By way of example only, fig. 7 shows a graph of the rotation angle of the moving contact 20 as a function of the rotation angle of the drive disk 3, wherein the abscissa represents the rotation angle of the drive disk 3 (which is measured with respect to the reference mark 65 in fig. 6) and the ordinate represents the rotation angle of the moving contact 20.

As can be seen from fig. 7, as the driving disc 3 rotates 70 degrees, the moving contact assembly of the present disclosure can achieve a rotation angle of around 130 degrees.

It is easy to understand that the degree of enlargement of the rotation angle of the movable contact 20 with respect to the rotation angle of the drive disk 3 depends on the distance of the movable contact shaft 24 with respect to both the drive lever 31 and the drive disk shaft 33. Accordingly, fig. 7 is merely an example, and in other embodiments, the degree of magnification of the rotation angle of the movable contact 20 with respect to the rotation angle of the drive disk 3 may be different.

It is also easy to understand that this allows the opening of the moving contact 20 with respect to the stationary contact 1 in the fully open state to be significantly enlarged due to the enlargement of the rotation angle of the moving contact 20 with respect to the rotation angle of the drive disk, which is advantageous for arranging a sufficient number of arc extinguishing gate sheets in a sufficiently large travel path of the moving contact 20. As previously mentioned, a sufficient number of arc chute plates may make it possible to eliminate the arrangement of permanent magnets within the switch assembly 2.

To test the arc extinguishing performance of the switch assembly of the present disclosure without the provision of permanent magnets, we have conducted related experiments on the switch assembly of the present disclosure. The related experiments show that: the electric arc generated by the moving and static contacts during opening the switch can quickly enter the arc extinguishing grid plate due to the action of a magnetic field generated by current on the electric arc and the action of air pressure generated by air heated by the electric arc. Once the arc enters the grid, it is interrupted by the arc extinguishing grid and a very high arc voltage is established, resulting in a continuous decrease in current. Particularly, as the movable contact rotates at a large angle, the electric arc is greatly elongated, the energy of the electric arc is rapidly reduced and extinguished, and the breaking of the current is completed. Therefore, the switch assembly of the present disclosure can achieve a better arc extinguishing performance even without providing a permanent magnet.

The switch assembly designed according to the present disclosure has been described above in detail. It should be appreciated that the switch assembly of the present disclosure may be provided as a stand-alone product or as part of an electrical device. In addition, various modifications or variations may be made to the designs of the present disclosure. For example, in some embodiments, it is also possible that the switch assembly includes only a single stationary contact and a corresponding movable contact. For another example, in some embodiments, an arc protection sleeve 27 may be disposed on the other side of the first movable contact end 21 and the second movable contact end 22 opposite to the side that is first contacted by the fixed contact 1 when closing a switch (see fig. 3 and 4), so as to avoid an arc being established on the one side, so as to better introduce the arc into the arc extinguishing grid sheet 3.

While the invention has been illustrated and described in detail in the drawings and foregoing description, such illustration and description are to be considered illustrative or exemplary and not restrictive; the invention is not limited to the disclosed embodiments. Other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed invention, from a study of the drawings, the disclosure, and the appended claims.

In the claims, the word "comprising" does not exclude other elements, and the indefinite article "a" or "an" does not exclude a plurality. A single element or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain features are recited in mutually different embodiments or in dependent claims does not indicate that a combination of these features cannot be used to advantage. The scope of the application encompasses any possible combination of the features recited in the various embodiments or the dependent claims without departing from the spirit and scope of the present application.

Furthermore, any reference signs in the claims shall not be construed as limiting the scope of the invention.

Claims (15)

1.A switch assembly (10), comprising:

A stationary contact (1);

A moving contact assembly (2) arranged to be pivotable via a moving contact shaft (24) and having a moving contact (20) and a driven slot (25); and

A drive disc (3) arranged to be pivotable via a drive disc shaft (33) and provided with a drive rod (31) extending from a disc face of the drive disc (3) towards the driven groove (25);

Wherein the moving contact shaft (24) is arranged to be concentric with the drive disc shaft (33), and the driven groove (25) is arranged to: is suitable for being matched with the driving rod (31) so as to drive the moving contact (20) to rotate around the moving contact shaft (24) under the driving of the driving rod (31) to realize the switching-on between the moving contact (20) and the fixed contact (1).

2. The switch assembly (10) of claim 1, wherein the drive rod (31), the drive disc shaft (33) and the moving contact shaft (24) are parallel in pairs, and the distance from the drive rod (31) to the drive disc shaft (33) is greater than the distance from the drive rod (31) to the moving contact shaft (24) throughout the rotational travel of the drive rod (31).

3. The switch assembly (10) according to claim 1, wherein the stationary contact (1) comprises a first stationary contact (11) and a second stationary contact (12), the first stationary contact (11) and the second stationary contact (12) being arranged on opposite sides within the overall structure of the switch assembly (10), respectively, the moving contact (20) having a first moving contact end (21) and a second moving contact end (22) symmetrically arranged about the moving contact axis (24),

Under the drive of the drive rod (31), the first movable contact end (21) can be switched on with the first fixed contact (11), and the second movable contact end (22) can be switched on with the second fixed contact (12).

4. A switch assembly (10) according to any one of claims 1-3, further comprising: a frame (4), said frame (4) being positioned between said moving contact assembly (2) and said driving disk (3),

Wherein the moving contact assembly (2) is pivotably mounted to a first side of the housing (4) via the moving contact shaft (24), the drive disc (3) being pivotably mounted to a second side of the housing (4) via the drive disc shaft (33), wherein the first side and the second side are opposite to each other.

5. The switch assembly (10) of claim 4, further comprising: -a first power spring (43), the first power spring (43) being arranged between the drive rod (31) and a first power spring fixed end (41) at the second side of the frame (4).

6. The switch assembly (10) of claim 5, wherein the drive plate (3) further comprises: -a storage spring release end (32) arranged on a side of the drive disc (3) facing the frame (4), wherein the positions of both the storage spring release end (32) and the drive rod (31) on the drive disc (3) are symmetrical with respect to the drive disc axis (33).

7. The switch assembly (10) of claim 6, further comprising: -a second power spring (44), the second power spring (44) being arranged between the power spring release end (32) and a second power spring fixing end (42) located at a second side of the frame (4), wherein the positions of both the first power spring fixing end (41) and the second power spring fixing end (42) on the frame (4) are symmetrical with respect to the drive disc axis (33).

8. The switch assembly (10) of claim 7, wherein the housing (4) further comprises a first limit slot (45), the drive rod (31) being arranged to rotate in an arcuate path within the first limit slot (45).

9. The switch assembly (10) of claim 8, wherein the power spring release end (32) is in the form of a lever and the housing (4) further comprises a second limit slot (46), the power spring release end (32) being arranged to: the driving rod (31) rotates in an arc track in the second limit groove (46) while rotating in an arc track in the first limit groove (45), wherein the first limit groove (45) and the second limit groove (46) are symmetrical about the driving disc shaft (33).

10. The switch assembly (10) of claim 9, wherein the first limit slot (45) and the second limit slot (46) are each arcuate slots.

11. The switch assembly (10) of claim 3, further comprising: the arc extinguishing grid plates (5) are positioned between the first fixed contact (11) and the second fixed contact (12) and distributed along the movement track of the first movable contact end (21) and the second movable contact end (22).

12. The switch assembly (10) of claim 11, wherein the arc chute sheet (5) does not overlap the motion trajectories of both the first and second movable contact ends (21, 22).

13. A switch assembly (10) according to claim 3, wherein the first and second movable contact ends (21, 22) each comprise a first side and a second side opposite to each other, wherein during the movement of the closing, the first and second movable contact ends (21, 22) establish electrical contact with the first and second stationary contacts (11, 12), respectively, first via the respective first sides;

wherein the moving contact assembly (2) further comprises: -an arc protection sleeve (27), said arc protection sleeve (27) being arranged at the respective second sides of the first and second movable contact ends (21, 22).

14. The switch assembly (10) according to any one of claims 1-3 and 5-13, wherein the switch assembly (10) is a direct current load switch.

15. Electrical device, characterized in that it comprises a switching assembly (20) according to any one of claims 1-13.