Arc-resistant constant voltage static contact group, movable contact group and movable and static contact group for electric switch machine
A technology of static contact and switch machine, which is used in electrical equipment for manipulating turnouts or line circuit breakers, railway car body parts, railway signals and safety, etc., can solve the problem of easy arcing and other problems when the dynamic and static contacts are inserted or pulled out. , to achieve the effect of improving equipment safety and reducing arcing
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[0038] Example 1:
[0039] Such as image 3 with Figure 4 As shown, the magnetic body 7 of the movable contact group is a magnetic ring, and the magnetic ring is arranged on the inner or outer side wall of the movable contact 6 by bonding, riveting, bolt connection or inlaid, and the height of the magnetic ring is not greater than the height of the movable contact 6. The specific magnetic ring setting position can be selected and used according to the actual situation.
[0040] Such as Figure 5 with Figure 8 As shown, the movable contact 6 includes a fixed shaft 61 and a movable contact ring 62 movably sleeved on the fixed shaft 61. One end of the fixed shaft 61 is connected to the base 5, and the magnetic ring is connected in the inner cavity of the movable contact ring 62 by interference fit. Such as Picture 9 As shown, the inner diameter of the magnetic ring is greater than the diameter of the fixed shaft 61, and the magnetic ring and the movable contact ring 62 can rotate r...
Example Embodiment
[0042] Example 2:
[0043] The number of magnetic rings is at least one, and two adjacent magnetic rings are connected or spaced, such as Image 6 As shown, the difference between embodiment 1 and embodiment 2 is that the number of magnetic rings is two, the two magnetic rings are respectively arranged on the upper and lower parts of the movable contact 6, and the upper and lower parts of the two magnetic rings have the same magnetic properties. , That is, when the upper part of the magnetic ring is N-pole, all the upper parts of the magnetic ring are N-pole.
Example Embodiment
[0044] Example 3:
[0045] Such as Figure 7 As shown, the difference between this embodiment 3 and embodiment 2 is that an odd number of spiral grooves 621 are uniformly provided on the outer circumferential surface of the movable contact ring 62, and the two ends of each groove are respectively located on the movable contact ring 62. And the bottom edge, and the top and bottom ends of two adjacent grooves are in a straight line. The groove is arranged so that when the movable contact ring 62 is inserted or pulled out between the left and right contact pieces, the contact area with the left and right contact pieces is different, so the friction force between the left and right contact pieces is different. When the contact 6 is moved out, the movable contact ring 62 can rotate, so that the friction part of the movable contact ring 62 is different from the left and right contact pieces each time, so as to avoid the same friction part every time when inserting or pulling out. The ...
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