JPH0283911A - Automatic core-adjusting contact maker - Google Patents

Abstract

PURPOSE:To hold a gap between a distance and a movable contact maker contact by providing two pieces each of springs with three kinds of spring constant respectively while making a mounting hole of a distance elliptic in an on-load tap changer of a transformer. CONSTITUTION:In an on-load tap changer of a transformer, springs 12 and 13 having different spring constant respectively are provided between a spring stop rod 9 and a distance 10 as well as between a movable contact maker 2 and a clamping rod 11 of a movable contact maker supporting plate 4. For instance, when the contact maker 2 is closed on a fixed contact maker 6 being slipped from the core, a spring 7 and the spring 12 are up and down balanced respectively. At the same time, since a mounting hole of a clamping rod 11 of the supporting plate 4 is made elliptic, the distance 10 follows the contact maker 2 so as to hold the gaps t1 and t2 always equal. Further, the spring 13 plays a role to hold always in a fixed position in the state where the contact maker 2 is not closed to the contact maker 6.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the prevention of misalignment of devices having movable parts, and particularly to a self-aligning contactor suitable for a movable contact part of an LTC tap selector.

[Conventional technology]

A conventional movable contact part will be explained with reference to FIG.

The fixed contact 6 is connected to the coil of the transformer and is connected to the insulating cylinder 8.
Depending on the adjustment voltage, several can be installed on the outer circumference of the The movable contact 2 moves the fixed contact 6 to adjust the voltage.
At this time, since the behavior of the movable contact 2 and the fixed contact 6 is not constant, they are inserted with a slight misalignment. Also 2
During assembly, the spring stopper rod is crimped to minimize misalignment, but this work is extremely difficult.

[Problem to be solved by the invention]

In the prior art, when the movable contact 2 is inserted into the fixed contact 6, the gap lt+ between the movable contact 2 and the distance 1-5 is
If tzl is large, it will cause galling between the movable contact 2 and the fixed contact 6. Also, during assembly, this gap is adjusted by the caulking position of the spring stopper rod 3, but this is very difficult because the adjustment is small.

The purpose of the present invention is to improve reliability and workability against galling.

[Means to solve the problem]

The above objective is achieved by always keeping the gap between the movable contact 2 and the fixed contact 6 constant9 [Operation] This self-aligning contact r is a state in which the fixed contact is misaligned. Even if the springs are turned on, two pairs of each of the three types try to reach an equilibrium state. As a result, the contactor of the present invention and the fixed contactor are brought into a concentric state, which serves to prevent the caulking phenomenon caused by misalignment.

〔Example〕

Hereinafter, one embodiment of the present invention will be explained with reference to FIG. In the present invention, springs 12 and 13 are provided between the spring fixing rods 1-9 between the constants 10, and between the rods 11 for tightening the movable contact 2 and the movable contact support plate 4, and the springs 12 and 13 have the same spring constant. This is a self-aligning contact that utilizes the balance between a pair of springs.

For example, rlT! l! When the contact 2 is inserted into the fixed contact 6 with a misalignment, the spring 7 and the spring 12 are balanced vertically, and at the same time, the movable contact support plate 4 is tightened so that the hole through which the rod 11 passes is oval. By making it.

By following the ir flJ contact 2, the constant 5 can always keep the gap between the hair and L2 equally constant. Also, the 5Jff operation becomes easy. 2 serves to keep the fixed contact at a constant position when it is not inserted into the fixed contact (j).

In addition, in the figure, 1 is a current collecting ring, and 14 is a beam.

〔Effect of the invention〕

According to the present invention, misalignment between the fixed contact and the movable contact can be absorbed and galling phenomenon can be prevented, so reliability is improved, and the core adjustment work is facilitated, resulting in improved workability.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the present invention, and FIG. 2 is a sectional view of a conventional L
TC tap selector nT! It is a sectional view of the FII contact part. 1. Current collector ring, 2. Possible IJJ contact, 3, 9. Spring stopper rod, 4. Support plate, 5.10. Distant. 6... Fixed contact, 7, 1.2.13... Spring, 8.
Insulating tube. ■...--Support plate tightening lot. Figure j

Claims (1)

[Claims] 1. In a load tap changer consisting of a movable contact, a constant, a spring, and a spring stopper rod, three types of springs with different spring constants are provided, two springs each, and the mounting hole of the constant is made into an inertia hole, and the above-mentioned Even if the movable contact and the fixed contact are inserted with misalignment, the springs are balanced upward and downward, and at the same time, the distant moves following the spring, and the distance between the distant and the movable contact is maintained. A self-aligning contact that maintains a constant gap at all times.