Electric switch

Abstract

The embodiment of the invention relates to an electric switch. An electrical switch comprises a frame (2), a first stationary contact (41), a rolling element (6) adapted to rotate relative to the frame (2), a rotating contact (8) stationary fixed to the rolling element (6), and an arc baffle system for enhancing the extinguishing of an arc between the first stationary contact (41) and the rotating contact (8) during an open event of the electrical switch. The arc baffle system comprises: a first arc baffle (91) movable relative to the frame (2) between a first position and a second position; and a mating part (92) adapted to cooperate with the first arc baffle (91) in order to enhance the extinguishing of the arc by pressing the arc between the first arc baffle (91) and the mating part (92).

Description

Technical Field

[0001] This invention relates to an electrical switch. Background Technology

[0002] An electric switch is a device suitable for opening and closing circuits connected to it. When a circuit is opened by an electric switch, an electric arc with a temperature reaching thousands of degrees Celsius may be generated within the switch. The arc consists of ionized gas containing a large number of free electrons. This gas plasma is conductive.

[0003] An electric arc delays the transition of an electrical switch from a conducting to a non-conducting state. Furthermore, electric arcs typically damage electrical switches and the electrical components that include them.

[0004] Arc baffle systems are known in the art for enhancing arc extinction during the opening event of an electrical switch. Examples of known electrical switches with arc baffle systems are described in publications EP4376038A1 and EP3985700A1. The arc baffle systems described in these publications are particularly effective in electrical switches with relatively large rotating contact rotation angles (approximately 90° or greater). Summary of the Invention

[0005] The purpose of this invention is to provide an electric switch with an arc baffle system that can effectively extinguish the arc even when the rotation angle of the rotating contact is relatively small.

[0006] The object of the present invention is achieved by the electrical switch described below.

[0007] The present invention aims to provide an arc baffle system adapted to enhance arc extinguishing by compressing the arc between a first arc baffle and a mating component. This arc baffle system is adapted to reduce the cross-sectional area of ​​the arc path, thereby extinguishing the arc.

[0008] The advantage of the electric switch of the present invention is that its arc baffle system can effectively extinguish the arc even when the rotation angle of the rotating contact is relatively small, for example, 45°. Attached Figure Description

[0009] The present invention will now be described in more detail with reference to the accompanying drawings and preferred embodiments. Wherein:

[0010] Figures 1 to 3 A switch accessory including an electric switch according to an embodiment of the present invention is shown;

[0011] Figure 4 It shows Figure 3 Part of the switch fittings shown;

[0012] Figure 5 yes Figure 4 A side view of a portion of the switch fitting shown;

[0013] Figure 6 A side view of an electrical switching mechanism according to another embodiment of the present invention is shown;

[0014] Figure 7 A side view of an electrical switching mechanism according to yet another embodiment of the present invention is shown;

[0015] Figure 8 and Figure 9 A side view of an electrical switching mechanism according to yet another embodiment of the present invention is shown. Detailed Implementation

[0016] Figure 1 A switch accessory is shown, comprising an electric switch according to an embodiment of the present invention and a control module 101 adapted to control the electric switch. Figure 1 In the image, the switch accessory is partially disassembled to reveal its internal structure.

[0017] Figure 1 The electric switch shown includes a frame 2, a first stationary contact 41, a second stationary contact 42, a rolling element 6, a rotating contact 8, an arc interruption system, and a transmission mechanism.

[0018] The first stationary contact 41 is stationary to the frame 2 and is adapted to be connected to a power source. The second stationary contact 42 is stationary to the frame 2 and is adapted to be connected to a load. The rolling element 6 is adapted to rotate relative to the frame 2 about a rotation axis between a first position and a second position.

[0019] The rotation angle of the rolling element 6 between the first position and the second position is 45°. In an alternative embodiment, the rotation angle of the rolling element about the rotation axis is limited to less than or equal to 70°. In another alternative embodiment, the rotation angle of the rolling element about the rotation axis is limited to less than or equal to 120°.

[0020] The rotating contact 8 is statically fixed to the rolling element 6 and includes a first contact portion 81. Figure 1 In the first position, the rolling element 6 is electrically connected to the first stationary contact 41. The first position of the rolling element 6 provides an on or off position for the electrical switch, in which the rotating contact 8 is electrically connected to the first stationary contact 41 and the second stationary contact 42.

[0021] The first stationary contact 41 and the first contact portion 81 of the rotating contact 8 are adapted to cooperate as a knife-shaped contact or a blade contact. This means that in the first position of the rolling element 6, current is adapted to flow between the first stationary contact 41 and the first contact portion 81 in a direction generally parallel to the axis of rotation.

[0022] The arc damper system is adapted to enhance the extinguishing of the arc between the first stationary contact 41 and the first contact portion 81 of the rotating contact 8 during an open event of the electrical switch. An open event is an event in which the electrical switch changes from the on position to the off position or the disconnected position.

[0023] exist Figure 2 In the middle position, the electric switch is in the intermediate position between the on and off positions. Figure 3 In the middle, the power switch is in the off position.

[0024] The arc baffle system includes a first arc baffle 91 and a mating component 92. The mating component 92 is adapted to mate with the first arc baffle 91 to enhance the extinguishing of the arc by compressing the arc between the first arc baffle 91 and the mating component 92.

[0025] The first arc baffle 91 is movable relative to the frame 2 between a first position and a second position. The mating component 92 is stationary relative to the frame 2. Both the first arc baffle 91 and the mating component 92 are made of electrically insulating material.

[0026] exist Figure 1 The first position of the first arc baffle 91 shown in the diagram allows for conductive contact between the first stationary contact 41 of the rotating contact 8 and the first contact portion 81. Figure 3 The second position of the first arc baffle 91 shown in the diagram blocks the path on which the arc would rest, if the first arc baffle 91 were not present. In the second position of the first arc baffle 91, the first arc baffle 91 is located on the path of the rotating contact 8, through which the rotating contact 8 moves during the rotation of the rolling element 6 between the first and second positions.

[0027] The transmission mechanism is adapted to transmit power from the rolling element 6 to the first arc baffle 91, such that rotation of the rolling element 6 causes the first arc baffle 91 to move relative to the frame 2. In the first position of the rolling element 6, the first arc baffle 91 is in its first position. In the second position of the rolling element 6, the first arc baffle 91 is in its second position.

[0028] In an alternative embodiment, the transmission mechanism is adapted to transfer power from another component of an electrical switch adapted to move during a disconnection event to the arc baffle system.

[0029] exist Figure 2In the middle, the first arc baffle 91 is positioned between its first and second positions. Figure 3 In the middle, the first arc baffle 91 is in its second position.

[0030] Figure 4 It shows Figure 3 Part of the switch accessories shown. Figure 5 yes Figure 4 A side view of a portion of the switch fitting shown. Figure 4 and Figure 5 In the middle, the power switch is in the off position.

[0031] The first arc baffle 91 is rotatable relative to the frame 2 about a first position and a second position. The baffle axis is parallel to the rotation axis 16. The baffle axis is spaced apart from the rotation axis 16 such that, in a longitudinal direction perpendicular to the rotation axis 16, the arcuate segment 417 of the first stationary contact 41 is located between the rotation axis 16 and the baffle axis. The arcuate segment 417 is a segment of the first stationary contact 41 on which one end of the arc is located during a disconnection event. Figure 5 In the middle, the vertical direction is the horizontal direction.

[0032] The first arc baffle 91 is arc-shaped. The first arc baffle 91 has an inner shielding surface and an outer shielding surface, and the shape of each shielding surface is a section of a circular straight cylinder. The center line of the circular straight cylinder coincides with the axis of the baffle.

[0033] The lateral dimension of the first arc baffle 91 is larger than the lateral dimension of the first contact portion 81, and also larger than the lateral dimension of the arcuate segment 417 of the first stationary contact 41. In this embodiment, the lateral dimension of the first arc baffle is at least 1 cm larger than the lateral dimension of the first contact portion, and at least 1 cm larger than the lateral dimension of the arcuate segment of the first stationary contact. The lateral dimension is parallel to the axis of rotation.

[0034] like Figure 5 As seen, in the final stage of the movement of the first arc baffle 91 from the first position to the second position, the first arc baffle 91 moves toward the mating member 92. The mating member 92 has a groove adapted to receive the leading edge of the first arc baffle 91.

[0035] In the second position of the first arc baffle 91, a small gap exists between the first arc baffle 91 and the mating component 92. In one embodiment, in the second position of the first arc baffle, the distance between the first arc baffle and the mating component is less than or equal to 1.5 mm. In another embodiment, in the second position of the first arc baffle, the distance between the first arc baffle and the mating component is less than or equal to 1.0 mm.

[0036] Generally, the smaller the gap between the first arc baffle and the mating component, the better. In some embodiments, a small gap is allowed between the first arc baffle and the mating component to account for manufacturing tolerances in electrical switches, such as in transmission mechanisms.

[0037] In an alternative embodiment, at the second position of the first arc baffle, the first arc baffle contacts the mating component, thereby closing the arc path. In this alternative embodiment, the contact surfaces of the first arc baffle and / or the mating component are made of an elastic material, wherein the contact surfaces are surfaces adapted to contact each other when the first arc baffle is in the second position. Because at least one contact surface is made of an elastic material, even if one or both contact surfaces wear or corrode, no gap will remain between the first arc baffle and the mating component in the second position.

[0038] In another alternative embodiment, at a second position of the first arc-shaped baffle, the first arc-shaped baffle contacts the mating component, and the transmission mechanism is provided with a spring system that allows compensation for any manufacturing tolerances in the electrical switch, such that the contact between the first arc-shaped baffle and the mating component does not jam the transmission mechanism.

[0039] Figures 1 to 3 The transmission mechanism is shown to include a first gear 11 stationary relative to the rolling element 6 and a second gear 12 stationary relative to a first arcuate baffle 91. The first gear 11 has more teeth than the second gear 12. Due to the gear ratio of the transmission mechanism, the rotation angle of the first arcuate baffle 91 between the first position and the second position is greater than the rotation angle of the rolling element 6 between the first position and the second position.

[0040] In one embodiment, the transmission ratio of the transmission mechanism is such that the rotation angle between the first position and the second position of the first arc baffle is greater than or equal to 300% of the rotation angle between the first position and the second position of the rolling element.

[0041] Figure 6 A side view of an electric switching mechanism according to another embodiment of the present invention is shown. In addition to the arc baffle system and the transmission mechanism, Figure 6 electrical switch and Figures 1 to 5 The electrical switch shown is the same.

[0042] exist Figure 6 In the illustrated embodiment, the arc baffle system includes a first arc baffle 912 and a mating component 922. The first arc baffle 912 is movable relative to the frame between a first position and a second position. The mating component 922 is movable relative to the frame between the first position and the second position.

[0043] The first arc baffle 912 is rotatable relative to the frame about a first position and a second position. The baffle axis is parallel to the rotation axis of the winding element 6. The baffle axis is spaced apart from the rotation axis such that, in the longitudinal direction perpendicular to the rotation axis, the arcuate segment 417 of the first stationary contact 41 is located between the rotation axis and the baffle axis.

[0044] The mating component 922 is rotatable relative to the frame between a first position and a second position about its axis. The axis of the mating component coincides with the axis of the baffle.

[0045] The first arc-shaped baffle 912 has a curved shape. The first arc-shaped baffle 912 has an inner obstruction surface and an outer obstruction surface, and the shape of each surface is a section of a cylinder. The center line of the cylinder coincides with the axis of the baffle.

[0046] The mating component 922 has a curved shape. The mating component 922 has an inner mating surface and an outer mating surface, each of which is a segment of a circular straight cylinder. The centerline of the circular straight cylinder coincides with the axis of the baffle. The radius of the inner mating surface of the mating component 922 is larger than the radius of the outer blocking surface of the first arc baffle 912.

[0047] Figure 6 An arc baffle system in the off position of an electric switch is shown, wherein a first arc baffle 912 and a mating component 922 overlap.

[0048] Figure 7 A side view of an electric switching mechanism according to yet another embodiment of the present invention is shown. In addition to the arc baffle system and the transmission mechanism, Figure 7 The electrical switch and Figures 1 to 5 The electrical switch shown is the same.

[0049] exist Figure 7 In the illustrated embodiment, the arc baffle system includes a first arc baffle 913 and a mating component (not shown). The first arc baffle 913 is movable relative to the frame between a first position and a second position. The mating component is stationary relative to the frame.

[0050] The first arc baffle 913 is adapted to move linearly between the first position and the second position. The first arc baffle 913 is a planar quadrilateral.

[0051] Figure 8 A side view of an electric switching mechanism according to yet another embodiment of the present invention is shown. In addition to the arc baffle system and the transmission mechanism, Figure 8 electrical switch and Figures 1 to 5 The electrical switches shown are the same.

[0052] exist Figure 8In the illustrated embodiment, the arc baffle system includes a first arc baffle 914 and a mating component 924. The first arc baffle 914 is movable relative to the frame between a first position and a second position. The mating component 924 is movable relative to the frame between the first position and the second position.

[0053] The first arc baffle 914 is adapted to move linearly between the first position and the second position. The first arc baffle 914 is a planar quadrilateral.

[0054] The mating component 924 is adapted to move linearly between a first position and a second position. The mating component 924 is a planar quadrilateral.

[0055] Figure 8 The arc baffle system is shown in the on position of the electric switch, wherein the first arc baffle 914 is spaced apart from the mating component 924. Figure 8 A first drive rod 291 adapted to move the first arc baffle 914 and a second drive rod 292 for moving the mating component 924 are also shown. Figure 8 In the middle, the first transmission rod 291 partially blocks the first arc baffle 914, while the second transmission rod 292 partially blocks the mating component 924.

[0056] Figure 9 It shows Figure 8 In the off position of the electric switch, the arc baffle system has the first arc baffle 914 in contact with the mating component 924, thus closing the arc path. Figure 9 In the middle, due to the shielding ratio of the first transmission rod 291 to the first arc baffle 914 Figure 8 There are fewer in the middle, therefore the visibility of the first arc baffle 914 is less than Figure 8 It's better in the middle.

[0057] In an embodiment not shown in the accompanying drawings, the first arc baffle is rotatable relative to the frame about a baffle axis between a first position and a second position, such that the baffle axis coincides with the rotation axis of the rolling element, wherein the first arc baffle is fixed to the rolling element. In the described embodiment, the first arc baffle is adapted to rotate eccentrically, such that in the final stage of the first arc baffle moving from the first position to the second position, the first arc baffle moves toward the mating component, thereby enhancing the compression effect of the arc baffle system.

[0058] It will be apparent to those skilled in the art that the inventive concept can be implemented in various ways. The present invention and its embodiments are not limited to the examples described above, but can be modified within the scope of the claims.

Claims

1. An electrical switch, comprising: Framework (2); First stationary contact (41), the first stationary contact is stationarily fixed to the frame (2) and adapted to be connected to a power source; A rolling element (6) is capable of rotating relative to the frame (2) about a rotation axis (16) between a first position and a second position; A rotating contact (8) is stationarily fixed to the rolling element (6) and includes a first contact portion (81) such that in the first position of the rolling element (6), the first contact portion (81) is electrically connected to the first stationary contact (41), and in the second position of the rolling element (6), the rotating contact (8) is disconnected from the first stationary contact (41). An arc baffle system adapted to enhance the extinguishing of an arc between the first stationary contact (41) and the first contact portion (81) of the rotating contact (8) during an open event of the electrical switch, wherein the arc baffle system includes a first arc baffle (91) movable relative to the frame (2) between a first position and a second position. The arc baffle system is characterized in that it includes a mating component (92) adapted to mate with the first arc baffle (91) to enhance the extinguishing of the arc by squeezing the arc between the first arc baffle (91) and the mating component (92).

2. The electric switch according to claim 1, wherein in the final stage of the first arc baffle (91) moving from the first position to the second position, the first arc baffle (91) moves toward the mating member (92).

3. The electric switch according to claim 1 or 2, wherein in the second position of the first arc baffle (91), the distance between the first arc baffle (91) and the mating component (92) is less than or equal to 1.5 mm.

4. The electric switch according to claim 1 or 2, wherein in the second position of the first arc baffle (91), the first arc baffle (91) contacts the mating member (92) such that the path of the arc is closed.

5. The electric switch according to claim 4, wherein the contact surface of the first arc baffle (91) and / or the contact surface of the mating component (92) is made of an elastic material, wherein the contact surfaces are surfaces adapted to contact each other in the second position of the first arc baffle (91).

6. The electric switch according to claim 1 or 2, wherein the first arc baffle (91) is rotatable relative to the frame (2) about the baffle axis between the first position and the second position.

7. The electrical switch according to claim 6, wherein the baffle axis is spaced apart from the rotation axis (16) such that, in a longitudinal direction perpendicular to the rotation axis (16), an arcuate segment (417) of the first stationary contact (41) is located between the rotation axis (16) and the baffle axis, wherein the arcuate segment (417) is a segment of the first stationary contact (41) on which the end of the arc is located during the disconnection event.

8. The electric switch according to claim 6, wherein the rotation angle between the first position and the second position of the first arc baffle (91) is greater than the rotation angle between the first position and the second position of the rolling element (6).

9. The electrical switch according to claim 1 or 2, wherein the electrical switch includes a transmission mechanism for transmitting power from a component of the electrical switch adapted to move during the disconnection event to the arc baffle system.

10. The electric switch according to claim 9, wherein the transmission mechanism is adapted to transmit power from the rolling element (6) to the first arc baffle (91) such that the rotation of the rolling element (6) causes the first arc baffle (91) to move relative to the frame (2).

11. The electric switch according to claim 10, wherein the transmission mechanism comprises a first gear (11) stationarily connected relative to the rolling element (6) and a second gear (12) stationarily connected relative to the first arc baffle (91).

12. The electrical switch according to claim 1 or 2, wherein the lateral dimension of the first arc baffle (91) is greater than the lateral dimension of the first contact portion (81) and greater than the lateral dimension of the arc segment (417) of the first stationary contact (41), wherein the arc segment (417) is a segment of the first stationary contact (41) on which the end of the arc is located during the disconnection event, and wherein the lateral dimension is parallel to the axis of rotation (16).

13. The electrical switch according to claim 1 or 2, wherein the first contact portion (81) of the first stationary contact (41) and the first contact portion (81) of the rotating contact (8) are adapted to cooperate as a knife-shaped contact.

14. The electric switch according to claim 1 or 2, wherein the rotation angle of the rolling element (6) about the rotation axis (16) is limited to an angle less than or equal to 120°.

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