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CN-122000243-A - Contact device for counteracting lifting

CN122000243ACN 122000243 ACN122000243 ACN 122000243ACN-122000243-A

Abstract

The invention relates to a contact arrangement having a proximal fixed contact arrangement with a proximal fixed contact section, having a distal fixed contact arrangement with a distal fixed contact section with a contact bridge movable in a switching direction from an open position to a closed position, and wherein the proximal fixed contact arrangement has a proximal base and the distal fixed contact arrangement has a distal base, wherein the proximal fixed contact section protrudes from the proximal base in the direction of the distal base and the distal fixed contact section protrudes from the distal base in the direction of the proximal base, and wherein the contact bridge is arranged at least in the closed position at a height in the switching direction which is both between the height in the switching direction of the proximal base and the height in the switching direction of the proximal fixed contact section and between the height in the switching direction of the distal base and the height in the switching direction of the distal fixed contact section.

Inventors

  • WIEGEL CHRISTOPHER

Assignees

  • 泰科电子连接解决方案有限责任公司

Dates

Publication Date
20260508
Application Date
20251103
Priority Date
20241105

Claims (15)

  1. 1. A contact device (1) for a switching device (56), such as a relay or contactor, Comprising a proximal fixed contact device (2) having a proximal fixed contact section (2 a), Having a distal fixed contact device (4) with a distal fixed contact section (4 a), Having a contact bridge (6 a) which can be moved in a switching direction (8) from an open position (10 a) to a closed position (10 b), which in the closed position (10 b) contacts the proximal and distal fixed contact sections (2 a, 4 a) and electrically connects them to one another, and which in the open position (10 a) is spaced apart from the proximal and distal fixed contact sections (2 a, 4 a), And wherein the proximal fixed contact device (2) has a proximal base (14) and the distal fixed contact device (4) has a distal base (16), wherein the proximal fixed contact section (2 a) protrudes from the proximal base (14) in the direction of the distal base (16) and the distal fixed contact section (4 a) protrudes from the distal base (16) in the direction of the proximal base (14), And wherein the contact bridge (6 a) is arranged at least in the closed position (10 b) at a height (18 a) in the switching direction (8), the height (18 a) being between the height (18 b) in the switching direction (8) of the proximal base (14) and the height (18 c) in the switching direction (8) of the proximal fixed contact section (2 a) and between the height (18 d) in the switching direction (8) of the distal base (16) and the height (18 e) in the switching direction (8) of the distal fixed contact section (4 a).
  2. 2. Contact arrangement (1) according to claim 1, Wherein the proximal base (14) and the distal base (16) are opposite to each other in a reference direction (11), and wherein a direction (64) in which the switching contacts (62) of the contact bridge (6 a) are spaced apart from each other extends perpendicular to the switching direction (8) and is at an angle (66) to the reference direction (11).
  3. 3. Contact arrangement (1) according to claim 2, Wherein the angle (66) is 90 °.
  4. 4. A contact device (1) according to any one of claims 1 to 3, Wherein the proximal fixed contact device (2) has a further proximal fixed contact section (2 a) and the distal fixed contact device (4) has a further distal fixed contact section (4 a), And wherein the proximal fixed contact section (2 a) is connected to the other proximal fixed contact section (2 b) via the proximal base (14), and wherein the distal fixed contact section (4 a) is connected to the other distal fixed contact section (4 b), Having a further contact bridge (6 b) which can be moved in the switching direction (8) from a further open position (12 a) into a further closed position (12 b), which in the further closed position (12 b) contacts the further proximal and further distal fixed contact sections (2 b, 4 b) and electrically connects them to one another, and which in the further open position (12 a) is spaced apart from the further proximal and further distal fixed contact sections (2 b, 4 b), And wherein the further contact bridge (6 b) is arranged at least in the further closed position (12 b) at a height (18 f) in the switching direction (8), the height (18 f) being between the height (18 b) in the switching direction (8) of the proximal base (14) and the height (18 g) in the switching direction (8) of the further proximal fixed contact section (2 a) and between the height (18 d) in the switching direction (8) of the distal base (16) and the height (18 h) in the switching direction (8) of the further distal fixed contact section (4 a).
  5. 5. Contact arrangement (1) according to any one of claims 1 to 4, Wherein in the switching direction (8), the proximal fixed contact section (2 a) is spaced apart from the proximal base (14) by a first proximal offset (22 a), and the distal fixed contact section (4 a) is spaced apart from the distal base (16) by a first distal offset (24 a), and/or Wherein, in the switching direction (8), the further proximal fixed contact section (2 b) is spaced apart from the proximal base (14) by a second proximal offset (22 b), and the further distal fixed contact section (4 b) is spaced apart from the distal base (16) by a second distal offset (24 b).
  6. 6. The contact device according to claim 5, Wherein the first proximal offset (22 a) and the first distal offset (24 a) are the same, and wherein the second proximal offset (22 b) and the second distal offset (24 b) are the same, and wherein the first proximal offset (22 a) and the first distal offset (24 a) are different from the second proximal offset (22 b) and the second distal offset (24 b).
  7. 7. Contact arrangement (1) according to any one of claims 1 to 6, Wherein the proximal and/or distal base (14, 16) has at least one flat side (28) pointing in the switching direction (8).
  8. 8. Contact arrangement (1) according to any one of claims 1 to 7, Wherein the proximal base (14) has at least one connection means (34) for receiving and/or fastening at least one current conductor (32), and/or wherein the distal base (16) has at least one connection means (34) for receiving and/or fastening at least one current conductor (32).
  9. 9. Contact arrangement (1) according to claim 8, Wherein the at least one connection means (34) comprises a connection tab (46) configured to be connected to the at least one current conductor (32).
  10. 10. Contact arrangement (1) according to claim 9, Wherein the at least one connection tab (46) extends at least partially along the switching direction (8).
  11. 11. Contact arrangement (1) according to claim 9 or 10, Wherein the at least one connection tab (46) does not intersect a plane spanned by the proximal fixed contact section (2 a) and the distal fixed contact section (4 a) and/or spanned by the further proximal fixed contact section (2 b) and the further distal fixed contact section (4 b), respectively.
  12. 12. Contact arrangement (1) according to any one of claims 1 to 11, Wherein the contact device (1) has a transition section (40), wherein the proximal fixed contact section (2 a) and the further proximal fixed contact section (2 b) are each connected to the proximal base (14) via one of the transition sections (40), and/or Wherein the distal fixed contact section (4 a) and the further distal fixed contact section (4 b) are each connected to the distal base (16) via one of the transition sections (40), Wherein the transition section (40) extends substantially along the switching direction (8).
  13. 13. Contact arrangement (1) according to any one of claims 1 to 12, Wherein at least one of the fixed contact means (2, 4) from the group of fixed contact means (2, 4) comprising said proximal and distal fixed contact means (2, 4) is integrally formed.
  14. 14. Contact arrangement (1) according to any one of claims 1 to 13, Has a quenching device (52) having at least one quenching magnet (54), wherein the quenching device (52) is designed to generate at least one magnetic field for deflecting an arc generated in the open position (10 a) or in the further open position (12 a).
  15. 15. An electrical switching apparatus (56), Having a contact device (1) according to any one of claims 1 to 14, And a drive (60) which is designed to move the first contact bridge (6 a) in the switching direction (8) from a first open position (10 a) to a first closed position (10 b) and to move the second contact bridge (6 b) in the switching direction (8) from a second open position (12 a) to a second closed position (12 b).

Description

Contact device for counteracting lifting Technical Field The present invention relates to a contact arrangement for a switching device, such as a relay or a contactor, and to a switching device having such a contact arrangement, in particular for an electric vehicle. Background Electrical switching devices such as relays or contactors are used to switch the current. Switching devices typically have contact bridges that are used to open or close an electrical circuit. When closed, the contact bridge contacts the fixed contact, and when open, the contact bridge is spaced apart from the fixed contact. In the field of electric vehicles, very high currents up to 27kA and above occur in the event of short circuits, for example during charging or in the drive train. This high current produces a repulsive force that pushes the contact bridge away from the fixed contacts. When the contact bridge is pushed away from the fixed contact, an arc may occur, which may damage or even destroy the switching device. Thus, the contact bridge should remain in contact with the fixed contact at least until the fuse in the circuit trips. Disclosure of Invention It is therefore an object of the present invention to provide a device which meets the above-mentioned requirements. This object is achieved by a contact arrangement for a switching device, such as a relay or a contactor, having a proximal fixed contact arrangement with a proximal fixed contact section, having a distal fixed contact arrangement with a distal fixed contact section, having a contact bridge movable in a switching direction from an open position to a closed position, which in the closed position contacts the proximal and distal fixed contact sections and electrically connects them to each other, and which in the open position is spaced apart from the proximal and distal fixed contact sections, and wherein the proximal fixed contact arrangement has a proximal base and the distal fixed contact arrangement has a distal base, wherein the proximal fixed contact section protrudes from the proximal base in the direction of the distal base and the distal fixed contact section protrudes from the distal base in the direction of the proximal base, and wherein the contact bridge is arranged at least in the closed position at a height in the switching direction, both between the height in the switching direction of the proximal base and the height in the switching direction of the proximal fixed contact section and between the height in the switching direction of the distal fixed contact section and the height in the switching direction of the distal fixed contact section. When a current flows through the above-mentioned contact arrangement during operation, a strong electromagnetic force is generated, in particular in the region of the base. Since the contact bridge is arranged between the base and the fixed contact section in the switching direction at least in its closed position, these electromagnetic forces press the contact bridge against the fixed contact section, which at least makes it more difficult for the contact bridge to lift from the fixed contact section and reduces the risk of arcing. The above-described invention can be further improved by the following features, each of which is itself advantageous and can be combined with each other as desired. The proximal and distal bases may each be designed to connect to a current conductor, such as a busbar, terminal, contact bolt, contact pin, or electrical plug. According to an advantageous embodiment, the proximal and distal bases may be opposite to each other in a reference direction, wherein the direction in which the switching contacts of the contact bridge are spaced apart from each other may extend perpendicular to the switching direction and at an angle to the reference direction. Such a contact arrangement is particularly compact in the reference direction. When the angle to the reference direction is 90 deg., there is a contact arrangement that is particularly compact in the reference direction. Of course, according to other embodiments, the contact bridge may also extend at a different angle, for example at an angle of about 45 ° to the reference direction. The switching contacts of the contact bridge may be designed to abut the near-end fixed contact section or the far-end fixed contact section in the closed position. In particular, the contact bridge may be contacted or distally secured in the closed position only by the switching contacts of the contact bridge. The direction in which the switching contacts of the contact bridge are spaced apart from each other may correspond to the longitudinal direction of the contact bridge. The contact arrangement is particularly compact in the reference direction if the proximal and distal fixed contact sections are adjacent to each other, and in particular overlap, at least partially, with respect to the direction in which the switching contacts of the contact bri