Toggle switch

Abstract

To provide a changeover switch which can minimize wear for many opening and closing operations.SOLUTION: A changeover switch for a medium voltage switchgear includes a first terminal body, a second terminal body, and two elongate pole bodies. The two elongate pole bodies are arranged parallel to each other and rotatably arranged with first ends on opposite sides of, and in direct contact with, the first terminal body around a rotation axis. The two elongate pole bodies are rotatable between an open position and a closed position. The second ends of the two elongate pole bodies are positioned in direct contact with opposite sides of the second terminal body. The changeover switch further includes spring means arranged between the two elongate pole bodies to urge the pole bodies towards each other.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a switching switch for a medium voltage switching device.

Background Art

[0002] The switching switch is used to achieve the insulation distance in the circuit after the current is interrupted by a circuit breaker or a load break switch. This switching switch is designed for a specific rated current. The current and resistance of the circuit greatly affect the temperature rise of the circuit. To prevent the temperature rise from becoming too high when the rated current is flowing, it is important that the total resistance of the switching switch remains low even after a specified number of switching operations.

[0003] Furthermore, the switching switch needs to be highly reliable for many opening and closing operations. Wear increases the ohmic resistance, so wear needs to be minimized.

[0004] The object of the present invention is to provide a switching switch in which the above-mentioned disadvantages are reduced or even prevented.

[0005] Summary of the Invention This object is achieved by a switching switch, which comprises: - a first terminal body, - a second terminal body, - two elongated pole bodies arranged parallel to each other, having a first end on the opposite side of the first terminal body around a rotation axis, and being rotatably arranged so as to be in direct contact with the first terminal body, the two elongated pole bodies being rotatable between an open position and a closed position, and a second end of the two elongated pole bodies being arranged in direct contact with the opposite side of the second terminal body, the two elongated pole bodies, - spring means arranged between the two elongated pole bodies and biasing the pole bodies towards each other.

[0006] Using the changeover switch according to the present invention, the spring mechanism biases the two elongated pole bodies into direct contact with the first and second terminal bodies. Even in the event of wear, the spring mechanism maintains this direct contact. Furthermore, the spring force of the spring mechanism also ensures sufficient contact force, which minimizes ohmic resistance and therefore minimizes undesirable heat generation.

[0007] In a preferred embodiment of the changeover switch according to the present invention, the spring means comprises at least one leaf spring, the central portion of which is connected to one of two elongated pole bodies and the ends of which are connected to the other of the two elongated pole bodies.

[0008] Leaf springs are elongated and generate relatively high spring forces with relatively small deformation in a direction perpendicular to their length. Due to their shape, leaf springs can be easily housed between two elongated poles while ensuring sufficient force to bias the elongated poles toward each other.

[0009] In a more preferred embodiment of the changeover switch according to the present invention, the spring mechanism comprises two leaf springs, each leaf spring having one central portion or end connected to the other, and the other central portion or end connected to each of the elongated pole bodies.

[0010] By using two leaf springs, the configuration of the changeover switch can be made symmetrical along the longitudinal direction of the changeover switch, that is, between the first terminal body and the second terminal body.

[0011] In a further embodiment of the changeover switch according to the present invention, at least one spacer is positioned between two leaf springs to adjust the pre-tension of the leaf springs.

[0012] Spacers allow you to set the pre-tension of a leaf spring. Thicker spacers reduce the pre-tension, while thinner spacers increase it.

[0013] It is even more preferable that at least one end of the leaf spring has a slot-shaped opening, and that a bolt extends through the slot-shaped opening to attach the end.

[0014] When a leaf spring deforms, its length changes slightly. By using a slot-shaped opening, this change in length can be absorbed while the ends remain connected.

[0015] A further embodiment of the changeover switch according to the present invention further comprises an operating rod positioned at a distance from the first end, with one end hinged to at least one of the elongated pole bodies.

[0016] The changeover switch can be rotated between the open and closed positions using the operating rod.

[0017] These and other features of the present invention will be described in conjunction with the accompanying drawings. [Brief explanation of the drawing]

[0018] [Figure 1] Figure 1 shows a perspective view of an embodiment of the changeover switch according to the present invention in the closed position. [Figure 2] Figure 2 shows a side view and the toggle switch in Figure 1 in the open position. [Figure 3] Figure 3 shows a cross-sectional view of the embodiment shown in Figure 1.

[0019] Figure 1 shows a changeover switch 1. The changeover switch 1 has a first terminal body 2 and a second terminal body 3. Two elongated pole bodies 4 are arranged such that their first ends are on the opposite side of the first terminal body 2. The elongated pole bodies 4 can rotate around a rotation axis 5 relative to the first terminal body 2.

[0020] In the diagram, when the changeover switch 1 is in the closed position, the elongated pole body 4 is positioned so that its second end is in direct contact with the opposite side of the second terminal body 3.

[0021] Two leaf springs 6 are positioned between the elongated pole body 4 to achieve sufficient contact force between the elongated pole body 4 and the first terminal body 2 and the second terminal body 3.

[0022] The operating rod 7 is positioned with one end hinged to the elongated pole body 4 so that the elongated pole body 4 can be rotated between the closed position shown in Figure 1 and the open position shown in Figure 2.

[0023] As shown in Figure 3, the leaf spring 4 has its central portion placed on the spacer 8, and its ends are attached to each elongated pole body 4 by bolts 9.

[0024] Each leaf spring 6 has a slot-shaped opening through which a bushing 10 extends, allowing the leaf spring 6 to move relative to the elongated pole body 4.

Claims

1. A changeover switch (1) for a medium-voltage switchgear, - The first terminal body (2), - The second terminal body (3), - Two elongated pole bodies (4) arranged parallel to each other, having a first end on the opposite side of the first terminal body (2) around the axis of rotation (5), and rotatably arranged to be in direct contact with the first terminal body, The two elongated pole bodies (4) are rotatable between an open position and a closed position, and the second ends of the two elongated pole bodies (4) are positioned in direct contact with the opposite side of the second terminal body (3), - A spring means (6) is positioned between the two elongated pole bodies (4) and biases the pole bodies (4) toward each other, Equipped with, The spring means (6) comprises at least one leaf spring (6) whose central portion is connected to one of the two elongated pole bodies (4) and whose ends are connected to the other of the two elongated pole bodies (4). Changeover switch (1).

2. The changeover switch (1) according to claim 1, wherein the spring means (6) comprises two leaf springs (6), and one of the central portion or the end of each leaf spring (6) is connected to the other, and the other of the central portion or the end is connected to each of the elongated pole bodies (4).

3. The changeover switch (1) according to claim 2, wherein at least one spacer (8) is positioned between the two leaf springs (6) to adjust the pre-tension of the leaf springs (6).

4. A changeover switch (1) according to any one of claims 1 to 3, wherein a slot-shaped opening is provided at the end of at least one leaf spring (6), and a bolt (9) extends through the slot-shaped opening for attaching the end.

5. The changeover switch (1) according to any one of claims 1 to 4, further comprising an operating rod (7) positioned at a distance from the first end, with one end hinged to at least one of the elongated pole bodies (4).

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